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Early Immune Cell and Antibody Kinetics Following SARS-CoV-2 Vaccination in Healthy Adults and Low-Count Monoclonal B-Cell Lymphocytosis.
Int J Mol Sci
January 2025
Translational and Clinical Research Program, Cancer Research Center (IBMCC, Instituto de Biología Molecular y Celular del Cáncer, CSIC-University of Salamanca), Cytometry Service, NUCLEUS, 37007 Salamanca, Spain.
The early immune kinetics after SARS-CoV-2 vaccination remain poorly understood, particularly among individuals with low-count monoclonal B-cell lymphocytosis (MBL). We investigated the cellular and humoral kinetics in the blood of 50 non-MBL healthy donors (HD) vs. 16 MBL subjects after SARS-CoV-2 vaccination, who were subclassified according to their history of previous exposure to SARS-CoV-2 into SARS-CoV-2 naïve and previously infected subjects.
View Article and Find Full Text PDFMycobacterium tuberculosis resisters despite HIV exhibit activated T cells and macrophages in their pulmonary alveoli.
J Clin Invest
January 2025
Program in Infectious Diseases and Global Health, The Research Institute of the McGill University Health Centre, Montréal, Canada.
Natural resistance to Mycobacterium tuberculosis (Mtb) infection in some people with HIV (PWH) is unexplained. We performed single cell RNA-sequencing of bronchoalveolar lavage cells, unstimulated or ex vivo stimulated with Mtb, for 7 PWH who were TST & IGRA positive (called LTBI) and 6 who were persistently TST & IGRA negative (called resisters). Alveolar macrophages (AM) from resisters displayed a baseline M1 macrophage phenotype while AM from LTBI did not.
View Article and Find Full Text PDFCytomegalovirus Infection in an Immunocompetent Host Presenting as Hemophagocytic Lymphohistiocytosis.
Eur J Case Rep Intern Med
December 2024
Department of Internal Medicine, Hospital de Santa Maria, ULS de Santa Maria, Lisbon, Portugal.
Unlabelled: Cytomegalovirus (CMV) is a human herpes virus with a worldwide seroprevalence of 60-100%, mainly known to cause severe life-threatening disease in immunocompromised patients. In immunocompetent hosts (IMCh), CMV causes a self-limiting mononucleosis-like infection, and severe pictures are less recognized. We report a case of a previously healthy 62-year-old woman evaluated in the Internal Medicine outpatient clinic for 3 weeks of progressive fatigue, generalised inflammatory arthralgias, hypogastric discomfort and daily persistent fever.
View Article and Find Full Text PDFWe report 14 cases of immune effector cell (IEC)-associated enterocolitis following chimeric antigen receptor T-cell (CAR-T) therapy in multiple myeloma, with a 1.2% incidence overall (0.2% for idecabtagene vicleucel and 2.
View Article and Find Full Text PDFGenomic instability and genetic heterogeneity in aging: insights from clonal hematopoiesis (CHIP), monoclonal gammopathy (MGUS), and monoclonal B-cell lymphocytosis (MBL).
Geroscience
October 2024
Healthy Aging Program, Institute of Preventive Medicine and Public Health, Semmelweis University, Budapest, Hungary.
Article Synopsis
- Aging involves a decline in bodily functions and greater risk of chronic diseases, with genomic instability being a key factor due to increased mutations in cells.
- The review highlights three specific age-related conditions—CHIP, MGUS, and MBL—that indicate genomic instability in the blood system and are common in older adults.
- Understanding these conditions can provide insights into how mutations accumulate as we age, which can improve predictions of biological age and support personalized healthcare approaches.
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