Janko Z. Nikolich

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• Adams, A. C., Macy, A. M., Borden, E. S., Herrmann, L. M., Brambley, C. A., Sonar, S. A., Ma, T., Li, X., Hughes, A., Roe, D. J., Mangold, A. R., Nikolich, J. Z., Buetow, K. H., Wilson, M. A., Baker, B. M., & Hastings, K. T. (2025). Structural changes from wild-type define tumor-rejecting neoantigens. Journal for immunotherapy of cancer, 13(10).
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  Challenges in predicting which neoantigens mediate tumor rejection limit the efficacy of neoantigen vaccines to treat cancers, especially for cancers with a high mutational burden like cutaneous squamous cell carcinoma (cSCC). Only a small portion of neoantigens prioritized by current methods elicit effective T cell responses, demonstrating the critical need for improved criteria for the prediction of tumor-rejecting neoantigens.
• Fain, M. J., Horne, B. D., Horwitz, L. I., Thaweethai, T., Greene, M., Hornig, M., Orkaby, A. R., Rosen, C., Ritchie, C. S., Ashktorab, H., Blachman, N., Brim, H., Emerson, S., Erdmann, N., Erlandson, K. M., de Erausquin, G., Fong, T., Geng, L. N., Gordon, H. S., , Gully, J. R., et al. (2025). Age-Related Changes in the Clinical Picture of Long COVID. Journal of the American Geriatrics Society, 73(10), 3123-3137.
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  This study evaluated the impact of aging on the frequency and prevalent symptoms of Long COVID, also termed post-acute sequelae of SARS-CoV-2, using a previously developed Long COVID research index (LCRI) of 41 self-reported symptoms in which those with 12 or more points were classified as likely to have Long COVID.
• Geng, L. N., Erlandson, K. M., Hornig, M., Letts, R., Selvaggi, C., Ashktorab, H., Atieh, O., Bartram, L., Brim, H., Brosnahan, S. B., Brown, J., Castro, M., Charney, A., Chen, P., Deeks, S. G., Erdmann, N., Flaherman, V. J., Ghamloush, M. A., Goepfert, P., , Goldman, J. D., et al. (2025). 2024 Update of the RECOVER-Adult Long COVID Research Index. JAMA, 333(8), 694-700.
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  Classification of persons with long COVID (LC) or post-COVID-19 condition must encompass the complexity and heterogeneity of the condition. Iterative refinement of the classification index for research is needed to incorporate newly available data as the field rapidly evolves.
• Horwitz, L. I., Becker, J. H., Huang, W., Akintonwa, T., Hornig-Rohan, M. M., Maranga, G., Adams, D. R., Albers, M. W., Ayache, M., Berry, J., Brim, H., Bryan, T. W., Charney, A. W., Clark, R. A., Cortez, M. M., D'Anza, B., Davis, H., Donohue, S. E., Erdmann, N., , Flaherman, V., et al. (2025). Olfactory Dysfunction After SARS-CoV-2 Infection in the RECOVER Adult Cohort. JAMA network open, 8(9), e2533815.
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  Olfactory dysfunction is common after SARS-CoV-2 infection and has been associated with cognitive loss in other conditions. Formal testing is needed to characterize the presence, severity, and patterns of olfactory dysfunction.
• Ille, M., Adamopoulos, I. E., Fain, M. J., & Nikolich, J. Ž. (2025). Osteoimmunology and aging - a frontier to explore. GeroScience.
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  Osteoimmunology is an interdisciplinary branch of immunology which studies the interplay of skeletal and immune systems. Both spatial and functional connections exist between the two systems, as most immune cells are generated in the bone marrow microenvironment, which facilitates the communication between the two systems. Moreover, immune cytokines such as RANKL (receptor activating Nf-kB ligand) and non-immune soluble mediators such as osteoprotegrin (OPG), made by immune and bone cells, respectively, interact to influence differentiation and activation of each other. The above interactions become of particular importance in the old age, when dysregulation of both systems yields changes affecting both length and quality of life. This perspective paper will outline both our current understanding as well as general gaps in knowledge, on geriatric osteoimmunology. We will also specifically address two highly prevalent diseases of aging, osteoarthritis and osteoporosis, as major sources of disability, loss of independence and increased morbidity and mortality in older adults, because cellular senescence appears to play a substantial pathogenetic role in both conditions, potentially opening new avenues for diagnosis and treatment.
• Kulik, G. L., Zheng, T., Jolley, S. E., Ashktorab, H., Brim, H., Feuerriegel, E. M., Hafner, J. W., Hess, R., Horne, B. D., Hornig, M., Johnson, B., Kim, C., Laiyemo, A. O., McComsey, G. A., Nikolich, J. Ž., Reid, K., Scherry, J., Sherif, Z. A., Tran, H. G., , Verduzco-Gutierrez, M., et al. (2025). Physical Function Differences by COVID-19 Status: A Cross-sectional Analysis From the RECOVER Adult Cohort. Physical therapy, 105(7).
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  Many adults with prior SARS-CoV-2 infection have persistent limitations, but few studies have examined objective physical function impairment that persist longer than 3 months after infection.
• Pivniouk, V., Pivniouk, O., Uhrlaub, J. L., Hahn, S., Molzahn, A., Kimura, H., Numata, M., Chu, H. W., Ledford, J. G., Kraft, M., Nikolich, J. Ž., & Vercelli, D. (2025). IL-13 protects epithelial cells from SARS-CoV-2 infection by inhibiting ACE2-mediated virus binding and cell entry. ImmunoHorizons, 9(12).
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  Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) preferentially infects airway epithelial cells. This infection is mediated by the binding of SARS-CoV-2 spike (S) protein to ACE2 expressed on target cells. Patients with allergic (type-2) asthma have been reported to be less susceptible to coronavirus disease 2019 (COVID-19), but these effects are controversial and mechanistically unclear. We previously showed lower expression of ACE2 mRNA in airway epithelial cells from type-2 asthmatics compared to healthy donors. Moreover, we and others demonstrated that the type-2 cytokine interleukin 13 (IL-13) suppresses ACE2 expression and SARS-CoV-2 infection in human epithelial cells. To better understand the relationship between type-2 inflammation, ACE2 expression, and SARS-CoV-2 infection, we investigated the effects of IL-13 on critical steps of epithelial cell infection by SARS-CoV-2: S protein-mediated binding to ACE2 on epithelial cells, and ACE2-mediated SARS-CoV-2 entry into these cells. Recombinant IL-13 significantly inhibited both these processes. This inhibition appeared to be mediated by IL-13-induced suppression of ACE2 transcription because IL-13 failed to affect S protein-mediated viral entry into cells that express ACE2 under the control of an IL-13 unresponsive heterologous promoter. We propose that IL-13 protects epithelial cells from SARS-CoV-2 infection largely by inhibiting ACE2 expression and ACE2-mediated downstream events that allow the virus to access its cellular targets.
• Quirk, G. E., Schoenle, M. V., Peyton, K. L., Uhrlaub, J. L., Lau, B., Liang, C. Y., Burgess, J. L., Ellingson, K., Beitel, S., Romine, J., Lutrick, K., Fowlkes, A., Britton, A., Tyner, H. L., Caban-Martinez, A. J., Naleway, A., Gaglani, M., Yoon, S., Edwards, L. J., , Olsho, L., et al. (2025). Intrinsic immunogenicity is a major determinant of type-specific responses in SARS-CoV-2 infections. Nature immunology, 26(6), 829-836.
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  Few type-specific antibodies that recognize drifted epitopes are made during post-vaccination exposures to SARS-CoV-2 variants, perhaps due to suppression by previous immunity. We compared type-specific B cell responses in unvaccinated and vaccinated individuals with Delta and Omicron BA.1 SARS-CoV-2 variant infections. For both Delta, which is antigenically similar to the vaccine strain, and the more distant BA.1 variant, neutralizing antibodies were greater in post-vaccination variant infections than in primary variant infections. Delta type-specific memory B cells were reduced in post-vaccination Delta infections relative to primary variant infections. Yet some drifted epitopes in the Delta variant elicited minimal responses even in primary infections. For BA.1 infections, type-specific antibodies and memory B cells were mostly undetectable, irrespective of previous immunity. Thus, poor intrinsic antigenicity of drifted epitopes in Delta and BA.1 infections superseded the impact of previous immunity. Enhancing the immunogenicity of vaccine antigens may promote type-specific responses.
• Shah, D. P., Thaweethai, T., Karlson, E. W., Bonilla, H., Horne, B. D., Mullington, J. M., Wisnivesky, J. P., Hornig, M., Shinnick, D. J., Klein, J. D., Erdmann, N. B., Brosnahan, S. B., Lee-Iannotti, J. K., Metz, T. D., Maughan, C., Ofotokun, I., Reeder, H. T., Stiles, L. E., Shaukat, A., , Hess, R., et al. (2025). Sex Differences in Long COVID. JAMA network open, 8(1), e2455430.
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  A substantial number of individuals worldwide experience long COVID, or post-COVID condition. Other postviral and autoimmune conditions have a female predominance, but whether the same is true for long COVID, especially within different subgroups, is uncertain.
• Alwine, J., Goodrum, F., Banfield, B., Bloom, D., Britt, W. J., Broadbent, A. J., Campos, S. K., Casadevall, A., Chan, G. C., Cliffe, A. R., Dermody, T., Duprex, P., Enquist, L. W., Frueh, K., Geballe, A. P., Gaglia, M., Goldstein, S., Greninger, A. L., Gronvall, G. K., , Jung, J. U., et al. (2024). The harms of promoting the lab leak hypothesis for SARS-CoV-2 origins without evidence. Journal of virology, 98(9), e0124024.
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  Science is humanity's best insurance against threats from nature, but it is a fragile enterprise that must be nourished and protected. The preponderance of scientific evidence indicates a natural origin for SARS-CoV-2. Yet, the theory that SARS-CoV-2 was engineered in and escaped from a lab dominates media attention, even in the absence of strong evidence. We discuss how the resulting anti-science movement puts the research community, scientific research, and pandemic preparedness at risk.
• Bradshaw, C. M., Georgieva, T., Tankersley, T. N., Taylor-Doyle, T., Johnson, L., Uhrlaub, J. L., Besselsen, D., & Nikolich, J. Ž. (2024). Cutting Edge: Characterization of Low Copy Number Human Angiotensin-Converting Enzyme 2-Transgenic Mice as an Improved Model of SARS-CoV-2 Infection. Journal of immunology (Baltimore, Md. : 1950), 212(4), 523-528.
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  A popular mouse model of COVID-19, the K18-hACE2 mouse, expresses the SARS-coronavirus entry receptor, human angiotensin-converting enzyme 2 (hACE2) driven by the keratin-18 promoter. SARS-CoV-2-infected K18-hACE2 mice exhibit neuropathology not representative of human infection. They contain eight transgene (Tg) copies, leading to excess hACE2 expression and rampant viral replication. We generated two new lines of K18-hACE2 mice encoding one and two copies of hACE2 (1-hACE2-Tg and 2-hACE2-Tg, respectively). Relative to the original strain (called 8-hACE2-Tg in this study), 2-hACE2-Tg mice exhibited lower mortality, with less viral replication in the lung and brain. Furthermore, 1-hACE2-Tg mice exhibited no mortality and had no detectable virus in the brain; yet, they exhibited clear viral replication in the lung. All three strains showed SARS-CoV-2-related weight loss commensurate with the mortality rates. 1-hACE2-Tg mice mounted detectable primary and memory T effector cell and Ab responses. We conclude that these strains provide improved models to study hACE2-mediated viral infections.
• Coplen, C. P., Jergovic, M., Terner, E. L., Bradshaw, C. M., Uhrlaub, J. L., & Nikolich, J. Ž. (2024). Virological, innate, and adaptive immune profiles shaped by variation in route and age of host in murine cytomegalovirus infection. Journal of virology, 98(5), e0198623.
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  Human cytomegalovirus (hCMV) is a ubiquitous facultative pathogen, which establishes a characteristic latent and reactivating lifelong infection in immunocompetent hosts. Murine CMV (mCMV) infection is widely used as an experimental model of hCMV infection, employed to investigate the causal nature and extent of CMV's contribution to inflammatory, immunological, and health disturbances in humans. Therefore, mimicking natural human infection in mice would be advantageous to hCMV research. To assess the role of route and age at infection in modeling hCMV in mice, we infected prepubescent and young sexually mature C57BL/6 (B6) mice intranasally (i.n., a likely physiological route in humans) and intraperitoneally (i.p., a frequently used experimental route, possibly akin to transplant-mediated infection). In our hands, both routes led to comparable early viral loads and tissue spreads. However, they yielded differential profiles of innate and adaptive systemic immune activation. Specifically, the younger, prepubescent mice exhibited the strongest natural killer cell activation in the blood in response to i.p. infection. Further, the i.p. infected animals (particularly those infected at 12 weeks) exhibited larger anti-mCMV IgG and greater expansion of circulating CD8 T cells specific for both acute (non-inflationary) and latent phase (inflationary) mCMV epitopes. By contrast, tissue immune responses were comparable between i.n. and i.p. groups. Our results illustrate a distinction in the bloodborne immune response profiles across infection routes and ages and are discussed in light of physiological parameters of interaction between CMV, immunity, inflammation, and health over the lifespan.
• Coplen, C. P., Sonar, S. A., & Nikolich, J. Ž. (2024). Late-life Attenuation of Cytomegalovirus-mediated CD8 T Cell Memory Inflation: Shrinking of the Cytomegalovirus Latency Niche. Journal of immunology (Baltimore, Md. : 1950), 213(7), 965-970.
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  CMV drives the accumulation of virus-specific, highly differentiated CD8 memory T cells (memory inflation [MI]). In mice, MI was shown to directly correlate with the CMV infection dose, yet the CMV-associated CD8 MI plateaus over time. It is unclear how MI is regulated with aging. We infected young mice with 102, 104, and 106 PFU of murine CMV and confirmed that MI magnitude was directly proportional to the infectious dose, reaching a setpoint by midlife. By old age, MI subsided, most prominently in mice infected with 106 PFU, and reached statistical parity between groups in 26-mo-old mice. This corresponded to an age-related loss in lymphatic endothelial cells in lymph nodes, recently shown to be sufficient to drive MI in mice. We propose that MI size and persistence over the lifespan is controlled by the size of the lymphatic endothelial cell niche, whose shrinking leads to reduced MI with aging.
• Erlandson, K. M., Geng, L. N., Selvaggi, C. A., Thaweethai, T., Chen, P., Erdmann, N. B., Goldman, J. D., Henrich, T. J., Hornig, M., Karlson, E. W., Katz, S. D., Kim, C., Cribbs, S. K., Laiyemo, A. O., Letts, R., Lin, J. Y., Marathe, J., Parthasarathy, S., Patterson, T. F., , Taylor, B. D., et al. (2024). Differentiation of Prior SARS-CoV-2 Infection and Postacute Sequelae by Standard Clinical Laboratory Measurements in the RECOVER Cohort. Annals of internal medicine, 177(9), 1209-1221.
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  There are currently no validated clinical biomarkers of postacute sequelae of SARS-CoV-2 infection (PASC).
• Greenhalgh, T., Sivan, M., Perlowski, A., & Nikolich, J. Ž. (2024). Long COVID: a clinical update. Lancet (London, England), 404(10453), 707-724.
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  Post-COVID-19 condition (also known as long COVID) is generally defined as symptoms persisting for 3 months or more after acute COVID-19. Long COVID can affect multiple organ systems and lead to severe and protracted impairment of function as a result of organ damage. The burden of this disease, both on the individual and on health systems and national economies, is high. In this interdisciplinary Review, with a coauthor with lived experience of severe long COVID, we sought to bring together multiple streams of literature on the epidemiology, pathophysiology (including the hypothesised mechanisms of organ damage), lived experience and clinical manifestations, and clinical investigation and management of long COVID. Although current approaches to long COVID care are largely symptomatic and supportive, recent advances in clinical phenotyping, deep molecular profiling, and biomarker identification might herald a more mechanism-informed and personally tailored approach to clinical care. We also cover the organisation of services for long COVID, approaches to preventing long COVID, and suggestions for future research.
• Rasmussen, A. L., Gronvall, G. K., Lowen, A. C., Goodrum, F., Alwine, J., Andersen, K. G., Anthony, S. J., Baines, J., Banerjee, A., Broadbent, A. J., Brooke, C. B., Campos, S. K., Caposio, P., Casadevall, A., Chan, G. C., Cliffe, A. R., Collins-McMillen, D., Connell, N., Damania, B., , Daugherty, M. D., et al. (2024). Correction for Rasmussen et al., "Virology-the path forward". Journal of virology, 98(3), e0007424.
• Rasmussen, A. L., Gronvall, G. K., Lowen, A. C., Goodrum, F., Alwine, J., Andersen, K. G., Anthony, S. J., Baines, J., Banerjee, A., Broadbent, A. J., Brooke, C. B., Campos, S. K., Caposio, P., Casadevall, A., Chan, G. C., Cliffe, A. R., Collins-McMillen, D., Connell, N., Damania, B., , Daugherty, M. D., et al. (2024). Virology-the path forward. Journal of virology, 98(1), e0179123.
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  In the United States (US), biosafety and biosecurity oversight of research on viruses is being reappraised. Safety in virology research is paramount and oversight frameworks should be reviewed periodically. Changes should be made with care, however, to avoid impeding science that is essential for rapidly reducing and responding to pandemic threats as well as addressing more common challenges caused by infectious diseases. Decades of research uniquely positioned the US to be able to respond to the COVID-19 crisis with astounding speed, delivering life-saving vaccines within a year of identifying the virus. We should embolden and empower this strength, which is a vital part of protecting the health, economy, and security of US citizens. Herein, we offer our perspectives on priorities for revised rules governing virology research in the US.
• Russell, S. J., Parker, K., Lehoczki, A., Lieberman, D., Partha, I. S., Scott, S. J., Phillips, L. R., Fain, M. J., & Nikolich, J. Ž. (2024). Post-acute sequelae of SARS-CoV-2 infection (Long COVID) in older adults. GeroScience, 46(6), 6563-6581.
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  Long COVID, also known as PASC (post-acute sequelae of SARS-CoV-2), is a complex infection-associated chronic condition affecting tens of millions of people worldwide. Many aspects of this condition are incompletely understood. Among them is how this condition may manifest itself in older adults and how it might impact the older population. Here, we briefly review the current understanding of PASC in the adult population and examine what is known on its features with aging. Finally, we outline the major gaps and areas for research most germane to older adults.
• Swank, Z., Borberg, E., Chen, Y., Senussi, Y., Chalise, S., Manickas-Hill, Z., Yu, X. G., Li, J. Z., Alter, G., Henrich, T. J., Kelly, J. D., Hoh, R., Goldberg, S. A., Deeks, S. G., Martin, J. N., Peluso, M. J., Talla, A., Li, X., Skene, P., , Bumol, T. F., et al. (2024). Measurement of circulating viral antigens post-SARS-CoV-2 infection in a multicohort study. Clinical microbiology and infection : the official publication of the European Society of Clinical Microbiology and Infectious Diseases, 30(12), 1599-1605.
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  To determine the proportion of individuals with detectable antigen in plasma or serum after SARS-CoV-2 infection and the association of antigen detection with postacute sequelae of COVID-19 (PASC) symptoms.
• Watanabe, M., Davidson, L., Smith, P., Castellucio, P. F., Jergovic, M., Uhrlaub, J. L., Smithey, M. J., Fantry, L. E., Dechambre, B., Wilson, R. C., Knox, K. C., Ren, J., Stowe, R. P., Weinstock, G., Twigg, H., & Nikolich, J. Ž. (2024). Anti-cytomegalovirus antibody levels stratify human immune profiles across the lifespan. GeroScience, 46(5), 4225-4242.
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  Human cytomegalovirus (hCMV) is a ubiquitous latent persistent herpesvirus infecting 60-90% of the population worldwide. hCMV carriage in immunocompetent people is asymptomatic; thus, hCMV can be considered a component of normative aging. However, hCMV powerfully modulates many features of the immune, and likely other, systems and organs. Questions remain as to how hCMV carriage affects the human host. We used anti-CMV antibody titers as a stratifying criterion to examine the impact of "intensity" of hCMV infection as a potential biomarker of aging, inflammation, and immune homeostasis in a cohort of 247 participants stratified into younger (21-40 years) and older (> 65 years of age) groups. We showed that anti-CMV antibody titers increased with age and directly correlated to increased levels of soluble tumor necrosis factor (sTNFR) I in younger but not older participants. CD8 + cell numbers were reduced in the older group due to the loss in CD8 + T naïve (Tn) cells. In CMV carriers and, in particular, in anti-CMV Ab-high participants, this loss was mitigated or reversed by an increase in the numbers of CD8 + T effector memory (Tem) and T effector memory reexpressing CD45RA (Temra) cells. Analysis of CD38, HLA-DR, and CD57 expression revealed subset (CD4 or CD8)-specific changes that correlated with anti-CMV Ab levels. In addition, anti-CMV Ab levels predicted anti-CMV CD8 T cell responsiveness to different CMV open reading frames (ORFs) selectively in older participants, which correlated to the transcriptional order of expression of specific CMV ORFs. Implications of these results for the potential predictive value of anti-CMV Ab titers during aging are discussed.
• Wilson, J. E., & Nikolich, J. Ž. (2024). Nurture over nature for old antitumor T cells. Nature immunology, 25(6), 932-934.
• Lafleur, B. J., White, L., Dake, M. D., Nikolich, J. Z., Sprissler, R., & Bhattacharya, D. (2023). No Evidence That Analgesic Use after COVID-19 Vaccination Negatively Impacts Antibody Responses. ImmunoHorizons, 7(12), 834-841.
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  Uptake of mRNA vaccines, especially booster immunizations, against COVID-19 has been lower than hoped, perhaps in part due to their reactogenicity. Analgesics might alleviate symptoms associated with vaccination, but they might also impact immune responses. We semiquantitatively measured Ab responses following COVID-19 vaccination in 2354 human participants surveyed about analgesic use after vaccination. Participants who used nonsteroidal anti-inflammatory drugs or acetaminophen after vaccination showed elevated Ab levels against the receptor-binding domain of Spike protein relative to those who did not use analgesics. This pattern was observed for both mRNA-1273 and BNT162b2 and across age groups. Participants who used analgesics more frequently reported fatigue, muscle aches, and headaches than did those who did not use painkillers. Among participants who reported these symptoms, we observed no statistically significant differences in Ab levels irrespective of analgesic use. These data suggest that elevated Ab levels are associated with symptoms and inflammatory processes rather than painkiller use per se. Taken together, we find no evidence that analgesic use reduces Ab responses after COVID-19 vaccination. Recommendation of their use to alleviate symptoms might improve uptake of booster immunizations.
• Quirk, G. E., Schoenle, M. V., Peyton, K. L., Uhrlaub, J. L., Lau, B., Burgess, J. L., Ellingson, K., Beitel, S., Romine, J., Lutrick, K., Fowlkes, A., Britton, A., Tyner, H. L., Caban-Martinez, A. J., Naleway, A., Gaglani, M., Yoon, S., Edwards, L., Olsho, L., , Dake, M., et al. (2023). Determinants of B cell responses to drifted epitopes in post-vaccination SARS-CoV-2 infections. medRxiv : the preprint server for health sciences.
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  Vaccine-induced immunity may impact subsequent responses to drifted epitopes in SARS-CoV-2 variants, but this has been difficult to quantify due to the challenges in recruiting unvaccinated control groups whose first exposure to SARS-CoV-2 is a primary infection. Through local, statewide, and national SARS-CoV-2 testing programs, we were able to recruit cohorts of individuals who had recovered from either primary or post-vaccination infections by either the Delta or Omicron BA.1 variants. Regardless of variant, we observed greater Spike-specific and neutralizing antibody responses in post-vaccination infections than in those who were infected without prior vaccination. Through analysis of variant-specific memory B cells as markers of responses, we observed that Delta and Omicron BA.1 infections led to a marked shift in immunodominance in which some drifted epitopes elicited minimal responses, even in primary infections. Prior immunity through vaccination had a small negative impact on these responses, but this did not correlate with cross-reactive memory B cells, arguing against competitive inhibition of naïve B cells. We conclude that dampened B cell responses against drifted epitopes are mostly a function of altered immunodominance hierarchies that are apparent even in primary infections, with a more modest contribution from pre-existing immunity, perhaps due to accelerated antigen clearance.
• Sonar, S. A., Watanabe, M., & Nikolich, J. Ž. (2023). Disorganization of secondary lymphoid organs and dyscoordination of chemokine secretion as key contributors to immune aging. Seminars in immunology, 70, 101835.
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  Aging is characterized by progressive loss of organ and tissue function, and the immune system is no exception to that inevitable principle. Of all the age-related changes in the body, reduction of the size of, and naïve T (Tn) cell output from, the thymus occurs earliest, being prominent already before or by the time of puberty. Therefore, to preserve immunity against new infections, over much of their lives, vertebrates dominantly rely on peripheral maintenance of the Tn cell pool in the secondary lymphoid organs (SLO). However, SLO structure and function subsequently also deteriorate with aging. Several recent studies have made a convincing case that this deterioration is of major importance to the erosion of protective immunity in the last third of life. Specifically, the SLO were found to accumulate multiple degenerative changes with aging. Importantly, the results from adoptive transfer and parabiosis studies teach us that the old microenvironment is the limiting factor for protective immunity in old mice. In this review, we discuss the extent, mechanisms, and potential role of stromal cell aging in the age-related alteration of T cell homeostatic maintenance and immune function decline. We use that discussion to frame the potential strategies to correct the SLO stromal aging defects - in the context of other immune rejuvenation approaches, - to improve functional immune responses and protective immunity in older adults.
• Akarapipad, P., Kaarj, K., Breshears, L. E., Sosnowski, K., Baker, J., Nguyen, B. T., Eades, C., Uhrlaub, J. L., Quirk, G., Nikolich-Zugich, J., Worobey, M., & Yoon, J. (2022). Smartphone-based sensitive detection of SARS-CoV-2 from saline gargle samples via flow profile analysis on a paper microfluidic chip. Biosensors and Bioelectronics, 207, 114192. doi:https://doi.org/10.1016/j.bios.2022.114192
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  Respiratory viruses, especially coronaviruses, have resulted in worldwide pandemics in the past couple of decades. Saliva-based paper microfluidic assays represent an opportunity for noninvasive and rapid screening, yet both the sample matrix and test method come with unique challenges. In this work, we demonstrated the rapid and sensitive detection of SARS-CoV-2 from saliva samples, which could be simpler and more comfortable for patients than existing methods. Furthermore, we systematically investigated the components of saliva samples that affected assay performance. Using only a smartphone, an antibody-conjugated particle suspension, and a paper microfluidic chip, we made the assay user-friendly with minimal processing. Unlike the previously established flow rate assays that depended solely on the flow rate or distance, this unique assay analyzes the flow profile to determine infection status. Particle-target immunoagglutination changed the surface tension and subsequently the capillary flow velocity profile. A smartphone camera automatically measured the flow profile using a Python script, which was not affected by ambient light variations. The limit of detection (LOD) was 1 fg/μL SARS-CoV-2 from 1% saliva samples and 10 fg/μL from simulated saline gargle samples (15% saliva and 0.9% saline). This method was highly specific as demonstrated using influenza A/H1N1. The sample-to-answer assay time was
• Vercelli, D., Nikolich-Zugich, J., Kraft, M., Anderson, D., Churko, J., Ezeh, P., Malone, S. P., Hahn, S., Conway, M. Y., VanLinden, S. R., Pivniouk, D., Michael, A., Uhrlaub, J. L., DeVries, A., Pivniouk, O., & Pivniouk, V. I. (2021). The OM-85 bacterial lysate inhibits SARS-CoV-2 infection of epithelial cells by downregulating SARS-CoV-2 receptor expression. The Journal of Allergy and Clinical Immunology. doi:10.1016/j.jaci.2021.11.019
• Yoon, J., Nikolich-Zugich, J., Uhrlaub, J. L., Baker, J., Sosnowski, K., Breshears, L. E., Nguyen, B. T., Akarapipad, P., & Kim, S. (2022). Direct Capture and Smartphone Quantification of Airborne SARS-CoV-2 on a Paper Microfluidic Chip. Biosensors and Bioelectronics, 200, 113912. doi:https://doi.org/10.1016/j.bios.2021.113912
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  SARS, a new type of respiratory disease caused by SARS-CoV, was identified in 2003 with significant levels of morbidity and mortality. The recent pandemic of COVID-19, caused by SARS-CoV-2, has generated even greater extents of morbidity and mortality across the entire world. Both SARS-CoV and SARS-CoV-2 spreads through the air in the form of droplets and potentially smaller droplets (aerosols) via exhaling, coughing, and sneezing. Direct detection from such airborne droplets would be ideal for protecting general public from potential exposure before they infect individuals. However, the number of viruses in such droplets and aerosols is too low to be detected directly. A separate air sampler and enough collection time (several hours) are necessary to capture a sufficient number of viruses. In this work, we have demonstrated the direct capture of the airborne droplets on the paper microfluidic chip without the need for any other equipment. 10% human saliva samples were spiked with the known concentration of SARS-CoV-2 and sprayed to generate liquid droplets and aerosols into the air. Antibody-conjugated submicron particle suspension is then added to the paper channel, and a smartphone-based fluorescence microscope isolated and counted the immunoagglutinated particles on the paper chip. The total capture-to-assay time was < 30 minutes, compared to several hours with the other methods. In this manner, SARS-CoV-2 could be detected directly from the air in a handheld and low-cost manner, contributing to slowing the spread of SARS-CoV-2. We can presumably adapt this technology to a wide range of other respiratory viruses.
• Yoon, J., Worobey, M., Nikolich-Zugich, J., Uhrlaub, J. L., Quirk, G., Kaarj, K., Sosnowski, K., Akarapipad, P., Nguyen, B. T., & Breshears, L. E. (2022). Sensitive, smartphone-based SARS-CoV-2 detection from clinical saline gargle samples. PNAS Nexus, pgac028. doi:https://doi.org/10.1093/pnasnexus/pgac028
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  Saliva specimens have drawn interest for diagnosing respiratory viral infections due to their ease of collection and decreased risk to healthcare providers. However, rapid and sensitive immunoassays have not yet been satisfactorily demonstrated for such specimens due to their viscosity and low viral loads. Using paper microfluidic chips and a smartphone-based fluorescence microscope, we developed a highly sensitive, low-cost immunofluorescence particulometric SARS-CoV-2 assay from clinical saline gargle samples. We demonstrated the limit of detection of 10 ag/μL. With easy-to-collect saline gargle samples, our clinical sensitivity, specificity, and accuracy were 100%, 86%, and 93%, respectively, for n = 27 human subjects with n = 13 RT-qPCR positives.
• Bhattacharya, D., Nikolich-Zugich, J., & Campion, J. M. (2020). Orthogonal SARS-CoV-2 Serological Assays Enable Surveillance of Low-Prevalence Communities and Reveal Durable Humoral Immunity. Immunity, 17(53), 8. doi:doi: 10.1101/2020.08.14.20174490
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  Many other clinical faculty involved in this project.
• Uhrlaub, J. L., Smithey, M. J., & Nikolich-zugich, J. (2017). Cutting Edge: The Aging Immune System Reveals the Biological Impact of Direct Antigen Presentation on CD8 T Cell Responses.. Journal of immunology (Baltimore, Md. : 1950), 199(2), 403-407. doi:10.4049/jimmunol.1700625
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  The vertebrate immune system uses multiple, sometimes redundant, mechanisms to contain pathogenic microorganisms that are always evolving to evade host defenses. Thus, the cowpox virus (CPXV) uses genes encoding CPXV12 and CPXV203 to prevent direct MHC class I presentation of viral peptides by infected cells. However, CD8 T cells are effectively primed against CPXV by cross-presentation of viral Ags in young mice. Old mice accumulate defects in both CD8 T cell activation and cross-presentation. Using a double-deletion mutant (∆12∆203) of CPXV, we show that direct priming of CD8 T cells in old mice yields superior recall responses, establishing a key contribution of this mechanism to host antipoxvirus responses and enhancing our fundamental understanding of how viral manipulation of direct presentation impacts pathogenesis. This also provides a proof of principle that suboptimal CD8 T cell in old organisms can be optimized by manipulating Ag presentation, with implications for vaccine design.
• Nikolich-Zugich, J., Li, G., Smithey, M. J., Rudd, B. D., & Nikolich-Zugich, J. -. (2012). Age-associated alterations in CD8α+ dendritic cells impair CD8 T-cell expansion in response to an intracellular bacterium. Aging cell, 11(6).
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  Age-associated decline in immunity to infection has been documented across multiple pathogens, yet the relative contributions of the aged priming environment and of lymphocyte-intrinsic defects remain unclear. To address the impact of the aging environment on T-cell priming, adult naïve OT-I TCR transgenic CD8 T cells, specific for the H-2Kb-restricted immunodominant OVA(257-264) epitope, were transferred into adult or old recipient mice infected with the recombinant intracellular bacterium Listeria monocytogenes carrying the chicken ovalbumin protein (Lm-OVA). We consistently found that adult OT-I CD8 expansion was reduced in aged recipient mice, and this correlated with numeric, phenotypic, and functional defects selectively affecting CD8α+ dendritic cells (DC). Following Lm-OVA infection, aged mice failed to accumulate CD8α+ DC in the spleen, and these cells expressed much lower levels of critical costimulatory molecules in the first three days following infection. Further, aged CD8α+ DC showed impaired uptake of the bacteria at very early time points following infection. Treatment of aged mice with Flt3 ligand (Flt3L) improved the number of DC present in the spleen prior to Lm-OVA infection, and improved, but did not reconstitute, OT-I expansion to Lm-OVA infection. These results suggest that age-associated changes in antigen uptake, pathogen sensing, and/or antigen presentation contribute to impaired adaptive immune responses to microbial pathogens with aging.
• Nikolich-Zugich, J., Smithey, M. J., Li, G., Venturi, V., Davenport, M. P., & Nikolich-Zugich, J. -. (2012). Lifelong persistent viral infection alters the naive T cell pool, impairing CD8 T cell immunity in late life. Journal of immunology (Baltimore, Md. : 1950), 189(11).
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  Persistent CMV infection has been associated with immune senescence. To address the causal impact of lifelong persistent viral infection on immune homeostasis and defense, we infected young mice systemically with HSV-1, murine CMV, or both viruses and studied their T cell homeostasis and function. Herpesvirus(+) mice exhibited increased all-cause mortality compared with controls. Upon Listeria-OVA infection, 23-mo-old animals that had experienced lifelong herpesvirus infections showed impaired bacterial control and CD8 T cell function, along with distinct alterations in the T cell repertoire both before and after Listeria challenge, compared with age-matched, herpesvirus-free controls. Herpesvirus infection was associated with reduced naive CD8 T cell precursors above the loss attributable to aging. Moreover, the OVA-specific CD8 T cell repertoire recruited after Listeria challenge was entirely nonoverlapping between control and herpesvirus(+) mice. To our knowledge, this study for the first time causally links lifelong herpesvirus infection to all-cause mortality in mice and to disturbances in the T cell repertoire, which themselves correspond to impaired immunity to a new infection in aging.
• Nikolich-Zugich, J., Lang, A., & Nikolich-Zugich, J. -. (2011). Functional CD8 T cell memory responding to persistent latent infection is maintained for life. Journal of immunology (Baltimore, Md. : 1950), 187(7).
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  Aging is associated with depressed naive T cell responses, but it is less clear whether T cell memory established early in life also becomes impaired with age. This is particularly important for T cells responding to latent persistent infection, which need to remain functional and capable of controlling the infection over the lifetime; however, repeated stimulation over the lifetime may dysregulate their maintenance or function, potentially contributing to impaired immunity in the elderly. Systemic infection with HSV-1, a persistent latent virus, is associated with memory inflation of virus-specific CD8 T cells. We tested how these inflated memory cells are maintained from adulthood into old age. We found no significant differences in the numbers (i.e., blood, spleen), ex vivo Ag-specific IFN-γ production, and in vivo recall response to HSV-1 (i.e., proliferation, IFN-γ production, cytolysis) between adult and old memory T cells. There was a discrete shift from dominantly effector memory phenotype in the adults to a central memory-like phenotype in the old mice, with fewer old cells expressing the killer cell lectin-like receptor G1 (KLRG1). Adult and old KLRG1(+) memory CD8 T cells were functionally identical: both produced IFN-γ but could minimally proliferate in response to viral challenge. Interestingly, regardless of age, KLRG1(+) cells retained the ability to proliferate and survive in response to homeostatic signals, both in vitro (culture with IL-7 and IL-15) and in vivo (expansion following transfer into lymphopenic recipients). This finding demonstrates that functional effector memory T cells, including those expressing KLRG-1, are maintained and are functional for life, despite the presence of persistent viral infection.
• Nikolich-Zugich, J., Rudd, B. D., Venturi, V., Davenport, M. P., & Nikolich-Zugich, J. -. (2011). Evolution of the antigen-specific CD8+ TCR repertoire across the life span: evidence for clonal homogenization of the old TCR repertoire. Journal of immunology (Baltimore, Md. : 1950), 186(4).
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  Defects in T cell responses against pathogens and reduced diversity of TCRs have been described at both extremes of the life span. Yet, we still lack information on how Ag-specific T cell populations are maintained and/or altered from birth to old age. In this study, for the first time to our knowledge, we provide insight into Ag-specific TCR repertoire changes over the life span at the single-cell level. We have examined the TCR diversity of the primary CD8(+) T cell response to the immunodominant HSV-1 epitope HSV glycoprotein B 495-502 (HSV gB(498-505); SSIEFARL) (gB-8p) in neonatal, adult, and old C57BL/6 mice. The global distinctive features of the gB-8p-specific TCR repertoire were preserved in mice of different ages. However, both old and especially neonatal mice exhibited significant decreases in TCR diversity compared with that of adult mice. Still, although the neonatal Ag-specific repertoire comprised expectedly shorter germline-biased CDR3β lengths, the repertoire was surprisingly complex, and only a minority of responding cells lacked random nucleotide additions. Changes with aging included increased use of the already dominant TCRVβ10 family, a trend for lower content of the TCR containing the germline WG motif in the CDR3, and a remarkable sharing of one dominant clonotype between individual old mice, implying operation of selective mechanisms. Implications for the rational design of vaccines for neonates and the elderly are discussed.
• Nikolich-Zugich, J., Rudd, B. D., Venturi, V., Li, G., Samadder, P., Ertelt, J. M., Way, S. S., Davenport, M. P., & Nikolich-Zugich, J. -. (2011). Nonrandom attrition of the naive CD8+ T-cell pool with aging governed by T-cell receptor:pMHC interactions. Proceedings of the National Academy of Sciences of the United States of America, 108(33).
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  Immunity against new infections declines in the last quartile of life, as do numbers of naive T cells. Peripheral maintenance of naive T cells over the lifespan is necessary because their production drastically declines by puberty, a result of thymic involution. We report that this maintenance is not random in advanced aging. As numbers and diversity of naive CD8(+) T cells declined with aging, surviving cells underwent faster rates of homeostatic proliferation, were selected for high T-cell receptor:pMHC avidity, and preferentially acquired "memory-like" phenotype. These high-avidity precursors preferentially responded to infection and exhibited strong antimicrobial function. Thus, T-cell receptor avidity for self-pMHC provides a proofreading mechanism to maintain some of the fittest T cells in the otherwise crumbling naive repertoire, providing a degree of compensation for numerical and diversity defects in old T cells.
• Nikolich-Zugich, J., Smithey, M. J., Renkema, K. R., Rudd, B. D., & Nikolich-Zugich, J. -. (2011). Increased apoptosis, curtailed expansion and incomplete differentiation of CD8+ T cells combine to decrease clearance of L. monocytogenes in old mice. European journal of immunology, 41(5).
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  Aging is accompanied by altered immunity, resulting in a variable state of poorly understood immunodeficiency. While both the numbers and the functionality of naïve T cells are decreased by aging, the impact of these changes upon immune defense against bacterial pathogens in vivo remains understudied. Using a model of Listeria monocytogenes (Lm), where the primary CD8(+) T-cell response is critically important for immune defense, we show that C57BL/6 (B6) mice exhibit an age-dependent reduction in survival, with delayed bacterial clearance in old animals. Kinetic analysis of antigen-specific CD8(+) T-cell expansion showed that CD8(+) effectors begin dividing at the same time in old and adult mice, but that the proliferative burst remained incomplete during discrete windows of time and was coupled with increased effector apoptosis in old mice. Further, antilisterial CD8(+) T cells in old mice showed altered expression of key phenotypic and effector molecules and diminished polyfunctionality, measured by the ability to simultaneously produce multiple effector molecules. These results suggest that defects in functional maturation of CD8(+) cells in aged mice, compounded by (or perhaps coupled to) their reduced expansion in response to infection, yield effector CD8(+) T-cell populations insufficient in size and capability to effectively clear newly encountered intracellular pathogens.
• Nikolich-Zugich, J., Uhrlaub, J. L., Brien, J. D., Widman, D. G., Mason, P. W., & Nikolich-Zugich, J. -. (2011). Repeated in vivo stimulation of T and B cell responses in old mice generates protective immunity against lethal West Nile virus encephalitis. Journal of immunology (Baltimore, Md. : 1950), 186(7).
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  Older adults exhibit higher morbidity and mortality from infectious diseases compared with those of the general population. The introduction and rapid spread of West Nile virus (WNV) throughout the continental United States since 1999 has highlighted the challenge of protecting older adults against emerging pathogens: to this day there is no therapy or vaccine approved for human use against West Nile encephalitis. In this study, we describe the characterization of T and B cell responses in old mice after vaccination with RepliVAX WN, a novel West Nile encephalitis vaccine based on single-cycle flavivirus particles. In adult mice, RepliVAX WN induced robust and long-lasting CD4(+) and CD8(+) T cell and Ab (B cell) responses against natural WNV epitopes, similar to those elicited by primary WNV infection. Primary and memory T and B cell responses in old mice against RepliVAX WN vaccination were significantly lower than those seen in younger mice, similar to the response of old mice to infection with WNV. Surprisingly, both the quality and the quantity of the recall Ab and T cell responses in vaccinated old mice were improved to equal or exceed those in adult animals. Moreover, these responses together (but not individually) were sufficient to protect both old and adult mice from severe WNV disease upon challenge. Therefore, at least two cycles of in vivo restimulation are needed for selection and expansion of protective lymphocytes in older populations, and live, single-cycle virus vaccines that stimulate both cellular and humoral immunity can protect older individuals against severe viral disease.
• Nikolich-Zugich, J., Rudd, B. D., Venturi, V., Smithey, M. J., Way, S. S., Davenport, M. P., & Nikolich-Zugich, J. -. (2010). Diversity of the CD8+ T cell repertoire elicited against an immunodominant epitope does not depend on the context of infection. Journal of immunology (Baltimore, Md. : 1950), 184(6).
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  The diversity of the pathogen-specific T cell repertoire is believed to be important in allowing recognition of different pathogen epitopes and their variants and thereby reducing the opportunities for mutation-driven pathogen escape. However, the extent to which the TCR repertoire can be manipulated by different vaccine strategies so as to obtain broad diversity and optimal protection is incompletely understood. We have investigated the influence of the infectious/inflammatory context on the TCR diversity of the CD8(+) T cell response specific for the immunodominant epitope in C57BL/6 mice, derived from glycoprotein B of HSV-1. To that effect, we compared TCR V segment utilization, CDR3 length, and sequence diversity of the response to natural HSV-1 infection with those elicited by either Listeria monocytogenes or vaccinia virus expressing the immunodominant epitope in C57BL/6 mice. We demonstrate that although the type of infection in which the epitope was encountered can influence the magnitude of the CD8(+) T cell responses, TCR beta-chain repertoires did not significantly differ among the three infections. These results suggest that widely different live vaccine vectors may have little impact upon the diversity of the induced CTL response, which has important implications for the design of live CTL vaccine strategies against acute and chronic infections.
• Nikolich-Zugich, J., Wertheimer, A. M., Uhrlaub, J. L., Hirsch, A., Medigeshi, G., Sprague, J., Legasse, A., Wilk, J., Wiley, C. A., Didier, P., Tesh, R. B., Murray, K. O., Axthelm, M. K., Wong, S. W., & Nikolich-Zugich, J. -. (2010). Immune response to the West Nile virus in aged non-human primates. PloS one, 5(12).
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  Risk of encephalitis from West Nile virus (WNV) infection increases dramatically with age. Understanding the basis of this susceptibility requires development of suitable animal models. Here, we investigated the immune response to WNV in old non-human primates.
• Nikolich-Zugich, J., Lang, A., Brien, J. D., & Nikolich-Zugich, J. -. (2009). Inflation and long-term maintenance of CD8 T cells responding to a latent herpesvirus depend upon establishment of latency and presence of viral antigens. Journal of immunology (Baltimore, Md. : 1950), 183(12).
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  Following the priming and contraction phases of the T cell response, latent persistent herpesviruses lead to an accumulation of large pools of virus-specific CD8 T cells, also known as memory inflation (MI). The mechanism of this inflation is incompletely understood, largely because the molecular reactivation of these viruses in vivo and its impact upon T cell biology have not been resolved in mice, and because the relevant observations in humans remain, by necessity, correlative. Understanding these processes is essential from the standpoint of the proposed critical role for latent herpesviruses in aging of the immune system. We studied the causes of memory CD8 T cell accumulation following systemic HSV-1 administration as a model of widespread latent viral infection in humans. A direct role of viral latency and Ag-specific restimulation in driving the accumulation and maintenance of inflated CD8 T cells and a strongly suggested role of viral reactivation in that process were shown by the following: 1) lack of MI in the absence of established latency; 2) prevention or delay of MI with drugs that curtail viral replication; and 3) abrogation of MI by the transfer of inflated T cells into a virus-free environment. These results strongly suggest that periodic, subclinical reactivations of a latent persistent virus cause dysregulation of memory CD8 T cell homeostasis, similar to the one in humans. Moreover, results with antiviral drugs suggest that this approach could be considered as a treatment modality for maintaining T cell diversity and/or function in old age.
• Nikolich-Zugich, J., & Nikolich-Zugich, J. -. (2008). Ageing and life-long maintenance of T-cell subsets in the face of latent persistent infections. Nature reviews. Immunology, 8(7).
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  A diverse and well-balanced repertoire of T cells is thought to be crucial for the efficacious defence against infection with new or re-emerging pathogens throughout life. In the last third of the mammalian lifespan, the maintenance of a balanced T-cell repertoire becomes highly challenging because of the changes in T-cell production and consumption. In this Review, I question whether latent persistent pathogens might be key factors that drive this imbalance and whether they determine the extent of age-associated immune deficiency.
• Nikolich-Zugich, J., Rudd, B. D., Brien, J. D., Davenport, M. P., & Nikolich-Zugich, J. -. (2008). Cutting edge: TLR ligands increase TCR triggering by slowing peptide-MHC class I decay rates. Journal of immunology (Baltimore, Md. : 1950), 181(8).
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  TLR ligands are among the key stimuli driving the optimal dendritic cell (DC) maturation critical for strong and efficacious T cell priming. In this study, we show that part of this effect occurs via increased TCR triggering. Pretreatment of DCs with TLR ligands resulted in the triggering of many more TCRs in responding CD8(+) T cells. Importantly, even when DCs expressed the same amount of cognate peptide-MHC (pMHC) molecules, TLR ligand treatment resulted in down-regulation of larger numbers of TCR molecules. This was independent of the up-regulation of costimulatory, adhesion or cytokine molecules or the amount of noncognate pMHCs. Rather, DCs pretreated with TLR ligands exhibited increased stability of cognate pMHCs, enabling extended TCR triggering. These findings are of potential importance to T cell vaccination.
• Nikolich-zugich, J., Lacorazza, H. D., Gounari, F., Borowski, C., Boehmer, H. V., & Aifantis, I. (2002). A critical role for the cytoplasmic tail of pTalpha in T lymphocyte development.. Nature immunology, 3(5), 483-8. doi:10.1038/ni779
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  Signals that emanate from the pre-T cell receptor (pre-TCR) regulate multiple processes required for the development of the alphabeta T cell lineage. In contrast to the gammadelta TCR, the pre-TCR localizes cell-autonomously to membrane rafts, where it appears to signal in a constitutive and ligand-independent manner. We addressed here the role played by structural features specific to the cytoplasmic domain of the pre-TCRalpha chain (pTalpha). More specifically, we examined a COOH-terminal proline-rich sequence that might play a role in signal transduction and a juxtamembrane cysteine residue that could be a target for palmitoylation, thus allowing spontaneous raft localization. Expression of pTalpha mutants in transgenic mice, retrovirally transduced T cell precursors and cell lines showed that the pTalpha cytoplasmic tail, in particular the proline-rich domain, plays a crucial role in pre-TCR signaling and T cell development. In contrast, the pTalpha juxtamembrane cysteine appeared to be dispensable for pre-TCR function.

Presentations

• Vercelli, D., Nikolich-Zugich, J. Z., Kraft, M., Ledford, J., Kimura, H., Molzahn, A., Uhrlaub, J. L., Pivniouk, O., & Pivniouk, V. I. (2023).

  IL-13 protects epithelial cells from SARS-CoV-2 infection by inhibiting early ACE2-mediated events

  . Immunology2023, The AAI Annual Meeting. Washington, DC: AAI.

Poster Presentations

• Brooks, H. L., Nikolich-Zugich, J., Langlais, P. R., Kelly, A. C., Moffett, C. K., Romero-Aleshire, M. J., Husband, N. A., & Uhlorn, J. A. (2019, September/Fall). Transcriptomic and Proteomic Analysis of CD4+ T Cells to Identify Sex Differences in Angiotensin II Signaling Pathways.. American Heart Association – Hypertension 2019 Scientific Sessions.
• Brooks, H. L., Langlais, P. R., Nikolich-Zugich, J., Nunez, F., Uhrlaub, J., Uhlorn, J. A., Romero-Aleshire, M. J., Moffett, C., & Husband, N. A. (2018, April). Angiotensin II-Induced Hypertension in VCD-Treated Menopausal Female Mice Elicits Significant Changes to the Splenic CD4+ Cell Proteome. Experimental Biology.
• Pollow, D., Romero-Aleshire, M. J., Uhrlaub, J., Nikolich-Zugich, J., Hay, M., & Brooks, H. L. (2014, April). Tcell-dependent hypertension is attenuated in female mice during angiotensin II infusion. FASEB 2014.
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  25. Pollow D.P., Romero-Aleshire, M.J., Uhrlaub J., Nikolich-Zugich J., Hay M., Brooks H.L. FASEB 2014, A751. 26. Beckman J., Moore-Dotson J.M., Romero-Aleshire M.J., Brooks H.L., and Eggers E.D. Morphology of the Retina in Early Diabetes. The Association for Research in Vision and Ophthalmology (ARVO), May 2014.27. Moore-Dotson JM, Mazade R.E., Bernstein, A.S., Romero-Aleshire, M.J., Brooks, H.L., and Eggers ED. Light-evoked rod bipolar cell inhibition is decreased in diabetes. FASEB Summer Research Conference, Retinal Neurobiology and Visual Processing, June 2014.28. Pollow DP, Perez JN, Constantopoulos E, Konhilas JP, Brooks HL. Menopause impairs cardiovascular resilience and blood pressure regulation. American College of Sports Medicine Annual Meeting 2014. Abstract #3087.29. Pollow DP, Romero-Aleshire MJ, Goldberg E, Nikolich-Zugich J, Brooks H.L. 17-β estradiol treatment prevents angiotensin II-induced hypertension in VCD-treated menopausal female mice, independent of renal T lymphocyte infiltration. American Heart Association Council for High Blood Pressure Research, San Francisco, Sept 2014. 30. Moore-Dotson, J.M., Beckman, J., Mazade, R.E., Bernstein, A.S., Romero-Aleshire, M.J., Brooks, H.L. and Eggers, E.D. Spontaneous GABAergic signaling in the retinal OFF pathway is reduced in diabetes. Society for Neuroscience, November 2014.

Reviews

• Cegledi, A., Cegledi, A., Russell, S., Russell, S., Phillips, L. R., Phillips, L. R., Scott, S., Scott, S., Fain, M. J., Fain, M. J., Lieberman, D., Lieberman, D., Partha, I., Partha, I., Nikolich, J. Z., Nikolich, J. Z., Parker, K., & Parker, K. (2024. Post-Acute Sequelae of SARS-CoV-2 Infection (Long COVID) in Older Adults(pp Dec;46(6):6563-6581). Geroscience.
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  Russell SJ, Parker K, Lehoczki A, Lieberman D, Partha IS, Scott SJ, Phillips LR, Fain MJ, Nikolich JŽ. Post-acute sequelae of SARS-CoV-2 infection (Long COVID) in older adults. Geroscience. 2024 Dec;46(6):6563-6581. doi: 10.1007/s11357-024-01227-8. Epub 2024 Jun 14. PMID: 38874693; PMCID: PMC11493926.Invited review -- first 2 authors shared lead authorship
• Cegledi, A., Russell, S., Phillips, L. R., Scott, S., Fain, M. J., Lieberman, D., Partha, I., Nikolich, J. Z., & Parker, K. (2024. Post-Acute Sequelae of SARS-CoV-2 Infection (Long COVID) in Older Adults.
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  Invited review article in preparation for publication 2024