Article
Rheumatology
Cristina M. Padilla, Eleanor Valenzi, Tracy Tabib, Banafsheh Nazari, John Sembrat, Mauricio Rojas, Patrizia Fuschiotti, Robert Lafyatis
Summary: This study analyzed lymphoid subpopulations in SSc-ILD lung tissue using single-cell RNA sequencing and found activated NK cells, CD8(+) tissue resident memory T cells, and Treg cells in SSc-ILD lungs. The transition of CD8(+) T cells to tissue resident memory phenotype was observed in SSc-ILD.
Review
Immunology
Abhinav Jain, Ines Sturmlechner, Cornelia M. Weyand, Joerg J. Goronzy
Summary: Immune memory is crucial for success of vaccinations, but its durability can be affected by age. Loss of T cell clones and changes in T cell composition contribute to the compromised immunity in older adults. Genome-wide studies provide insights into the heterogeneity and functional changes of T cells with age.
FRONTIERS IN IMMUNOLOGY
(2023)
Article
Immunology
Weinian Liao, Chaonan Liu, Ke Yang, Jun Chen, Yiding Wu, Shuzhen Zhang, Kuan Yu, Lisha Wang, Li Ran, Mo Chen, Fang Chen, Yang Xu, Song Wang, Fengchao Wang, Qian Zhang, Jinghong Zhao, Lilin Ye, Changhong Du, Junping Wang
Summary: The accumulation of DNA mutations in aging hematopoietic stem cells (HSCs) increases the expression of MHCII on their surface, allowing them to be recognized by bone marrow regulatory T cells (Tregs). Tregs transfer cAMP to aged HSCs through gap junctions, promoting their survival and preventing apoptosis. Disrupting the interaction between HSCs and Tregs effectively prevents premature/physiological aging of HSCs.
CELLULAR & MOLECULAR IMMUNOLOGY
(2023)
Review
Immunology
Masato Asaoka, Hiroki Kabata, Koichi Fukunaga
Summary: Group 2 innate lymphoid cells (ILC2s) are tissue-resident cells that produce type 2 cytokines and are associated with various pathological conditions in different organs. The diversity of ILC2s is influenced by post-natal tissue environment, developmental timing, and activation. They can acquire other ILC-like functions depending on the tissue environment. Understanding the heterogeneity of ILC2s is crucial for studying their impact on human diseases.
FRONTIERS IN IMMUNOLOGY
(2022)
Article
Immunology
Sarah A. Greaves, Avinash Ravindran, Radleigh G. Santos, Lan Chen, Michael T. Falta, Yang Wang, Angela M. Mitchell, Shaikh M. Atif, Douglas G. Mack, Alex N. Tinega, Lisa A. Maier, Shaodong Dai, Clemencia Pinilla, Johan Grunewald, Andrew P. Fontenot
Summary: The acute form of sarcoidosis known as Lofgren's syndrome is genetically associated with HLA-DR3 and characterized by an accumulation of CD4(+) T cells in bronchoalveolar lavage. Research has identified a peptide from Aspergillus nidulans that stimulates CD4(+) T cells in an HLA-DR3-restricted manner in LS patients. Additionally, LS subjects showed increased IFN-gamma and IL-2-secreting T cells in response to the NDPD peptide, along with elevated IgG antibody responses to A. nidulans NDPD in their serum. These findings suggest a potential role of A. nidulans in the etiology of LS.
JOURNAL OF EXPERIMENTAL MEDICINE
(2021)
Article
Immunology
Naoki Kaneko, Julie Boucau, Hsiao-Hsuan Kuo, Cory Perugino, Vinay S. Mahajan, Jocelyn R. Farmer, Hang Liu, Thomas J. Diefenbach, Alicja Piechocka-Trocha, Kristina Lefteri, Michael T. Waring, Katherine R. Premo, Bruce D. Walker, Jonathan Z. Li, Gaurav Gaiha, Xu G. Yu, Mathias Lichterfeld, Robert F. Padera, Shiv Pillai
Summary: The study found that cytotoxic CD4+ T cells increase in the lungs, draining lymph nodes, and blood in severe COVID-19, while CD8+ T cells do not show a significant increase. This suggests that CD4+ T cells may play a role in viral clearance and contribute to lung inflammation and fibrosis in severe COVID-19.
CLINICAL IMMUNOLOGY
(2022)
Article
Immunology
Murilo Delgobo, Margarete Heinrichs, Nils Hapke, DiyaaElDin Ashour, Marc Appel, Mugdha Srivastava, Tobias Heckel, Ioakim Spyridopoulos, Ulrich Hofmann, Stefan Frantz, Gustavo Campos Ramos
Summary: The cardiovascular and immune systems undergo significant changes with aging, and an accumulation of CD4(+) T cells in elderly individuals may contribute to myocardial aging and heart disease progression. By studying young mice with expanded CD4(+) T cell compartments, researchers found that these cells can differentiate and impact the heart, suggesting a link between immunological senescence and age-related cardiac deterioration.
FRONTIERS IN IMMUNOLOGY
(2021)
Review
Immunology
Helena Slaets, Lena Fonteyn, Bert Eijnde, Niels Hellings
Summary: Frailty and a failing immune system in the final years of life contribute to healthcare burdens, but regular exercise can help combat muscle loss and support immune system function. T cells play an important role in both muscle pathology and exercise-induced immune responses. This review article provides insights into T cell senescence, how exercise modulates it, and the involvement of T cells in muscle regeneration and growth. Understanding the interactions between myocytes and T cells can help develop strategies to address age-related diseases.
BRAIN BEHAVIOR AND IMMUNITY
(2023)
Article
Immunology
Georgiana Toma, Ioana Maria Lemnian, Eliza Karapetian, Ivo Grosse, Barbara Seliger
Summary: Memory CD8(+) T cells increase with aging, leading to higher susceptibility to infections and decreased vaccine efficiency. In this study, the age-dependent expression profile of CD8(+) T cells from young and old donors was analyzed. The results showed that CD8(+)CD45RA(-) memory T cells from old donors maintained the characteristics of total CD8(+) T cells, including increased cytokine secretion and JAK-STAT pathway transcripts.
FRONTIERS IN IMMUNOLOGY
(2022)
Review
Genetics & Heredity
Xianmei Zhong, Jie Chen, Bo Wen, Xu Wu, Mingxing Li, Fukuan Du, Yu Chen, Shuai Deng, Yueshui Zhao, Jing Shen, Zhangang Xiao
Summary: Immunosenescence, characterized by immunodeficiency and inflammation, occurs with age. This review explores the potential role of mesenchymal stem cells (MSCs) in protecting against T cell aging, providing new insights for intervening in immune system aging.
JOURNAL OF MOLECULAR MEDICINE-JMM
(2023)
Review
Biochemistry & Molecular Biology
Hirofumi Kiyokawa, Yuma Hoshino, Kazuhiro Sakaguchi, Shigeo Muro, Junji Yodoi
Summary: Epithelial cells in the respiratory system are directly exposed to exogenous ROS, increasing the risk of oxidative stress; Dysfunction of redox regulation due to cellular aging accelerates COPD pathogenesis; Drugs targeting oxidative stress pathways can help precisely regulate the redox system.
Review
Cell Biology
Laura O. Knapik, Shubangi Paresh, Dalileh Nabi, Lynae M. Brayboy
Summary: Infertility is a global issue affecting a significant number of couples, with delayed child-bearing and autoimmune diseases playing contributing factors. The role of T cells in infertility, specifically in ovarian physiology, remains to be fully understood.
FRONTIERS IN CELL AND DEVELOPMENTAL BIOLOGY
(2022)
Review
Immunology
Lourdes Rocamora-Reverte, Franz Leonard Melzer, Reinhard Wuerzner, Birgit Weinberger
Summary: The immune system is a tightly regulated network, where regulatory T cells play an important role in maintaining immune homeostasis. Different types of T cells have regulatory functions in modulating immune responses, and the aging process can affect the composition of immune cells.
FRONTIERS IN IMMUNOLOGY
(2021)
Article
Medicine, General & Internal
Leah Zuroff, Ayman Rezk, Koji Shinoda, Diego A. Espinoza, Yehezqel Elyahu, Bo Zhang, Andrew A. Chen, Russell T. Shinohara, Dina Jacobs, Roy N. Alcalay, Thomas F. Tropea, Alice Chen-Plotkin, Alon Monsonego, Rui Li, Amit Bar-Or
Summary: In the study comparing untreated MS patients with normal controls, it was found that MS patients exhibited early and persistent redistribution of naive and memory CD4 T-cell compartments. While most CD4 and CD8 T-cell aging trajectories were similar between groups, MS patients demonstrated abnormal age-associated increases, particularly in patients over 60.
Article
Immunology
Yu Zhao, Christoph Kilian, Jan-Eric Turner, Lidia Bosurgi, Kevin Roedl, Patricia Bartsch, Ann-Christin Gnirck, Filippo Cortesi, Christoph Schultheiss, Malte Hellmig, Leon U. B. Enk, Fabian Hausmann, Alina Borchers, Milagros N. Wong, Hans-Joachim Paust, Francesco Siracusa, Nicola Scheibel, Marissa Herrmann, Elisa Rosati, Petra Bacher, Dominik Kylies, Dominik Jarczak, Marc Luetgehetmann, Susanne Pfefferle, Stefan Steurer, Julian Schulze Zur-Wiesch, Victor G. Puelles, Jan-Peter Sperhake, Marylyn M. Addo, Ansgar W. Lohse, Mascha Binder, Samuel Huber, Tobias B. Huber, Stefan Kluge, Stefan Bonn, Ulf Panzer, Nicola Gagliani, Christian F. Krebs
Summary: Hyperinflammation contributes to lung injury in severe COVID-19, with T-RM 17 cells identified as potential orchestrators of this process. High levels of IL-17A and GM-CSF were associated with a more severe clinical course in patients with COVID-19.
SCIENCE IMMUNOLOGY
(2021)