{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,27]],"date-time":"2026-07-27T23:13:22Z","timestamp":1785194002494,"version":"3.55.0"},"reference-count":99,"publisher":"MDPI AG","issue":"18","license":[{"start":{"date-parts":[[2024,9,17]],"date-time":"2024-09-17T00:00:00Z","timestamp":1726531200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100010438","name":"National Center of Science","doi-asserted-by":"publisher","award":["2022\/47\/B\/NZ6-0048"],"award-info":[{"award-number":["2022\/47\/B\/NZ6-0048"]}],"id":[{"id":"10.13039\/501100010438","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJMS"],"abstract":"<jats:p>Common variable immunodeficiency (CVID) is the most common symptomatic antibody deficiency, characterized by heterogeneous genetic, immunological, and clinical phenotypes. It is no longer conceived as a sole disease but as an umbrella diagnosis comprising a spectrum of clinical conditions, with defects in antibody biosynthesis as their common denominator and complex pathways determining B and T cell developmental impairments due to genetic defects of many receptors and ligands, activating and co-stimulatory molecules, and intracellular signaling molecules. Consequently, these genetic variants may affect crucial immunological processes of antigen presentation, antibody class switch recombination, antibody affinity maturation, and somatic hypermutation. While infections are the most common features of pediatric CVID, variants in genes linked to antibody production defects play a role in pathomechanisms of immune dysregulation with autoimmunity, allergy, and lymphoproliferation reflecting the diversity of the immunogenetic underpinnings of CVID. Herein, we have reviewed the aspects of genetics in CVID, including the monogenic, digenic, and polygenic models of inheritance exemplified by a spectrum of genes relevant to CVID pathophysiology. We have also briefly discussed the epigenetic mechanisms associated with micro RNA, DNA methylation, chromatin reorganization, and histone protein modification processes as background for CVID development.<\/jats:p>","DOI":"10.3390\/ijms25189999","type":"journal-article","created":{"date-parts":[[2024,9,18]],"date-time":"2024-09-18T01:52:31Z","timestamp":1726624351000},"page":"9999","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Immunogenetic Landscape in Pediatric Common Variable Immunodeficiency"],"prefix":"10.3390","volume":"25","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7244-1882","authenticated-orcid":false,"given":"Aleksandra","family":"Szczawi\u0144ska-Pop\u0142onyk","sequence":"first","affiliation":[{"name":"Department of Pediatric Pneumonology, Allergy and Clinical Immunology, Institute of Pediatrics, Poznan University of Medical Sciences, Szpitalna 27\/33, 60-572 Pozna\u0144, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0007-5425-4160","authenticated-orcid":false,"given":"Wiktoria","family":"Ciesielska","sequence":"additional","affiliation":[{"name":"Student Scientific Society, Poznan University of Medical Sciences, 60-572 Pozna\u0144, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-1741-8522","authenticated-orcid":false,"given":"Marta","family":"Konarczak","sequence":"additional","affiliation":[{"name":"Student Scientific Society, Poznan University of Medical Sciences, 60-572 Pozna\u0144, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0005-2878-0306","authenticated-orcid":false,"given":"Jakub","family":"Opanowski","sequence":"additional","affiliation":[{"name":"Student Scientific Society, Poznan University of Medical Sciences, 60-572 Pozna\u0144, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0000-5447-7873","authenticated-orcid":false,"given":"Aleksandra","family":"Orska","sequence":"additional","affiliation":[{"name":"Student Scientific Society, Poznan University of Medical Sciences, 60-572 Pozna\u0144, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-5044-3143","authenticated-orcid":false,"given":"Julia","family":"Wr\u00f3blewska","sequence":"additional","affiliation":[{"name":"Student Scientific Society, Poznan University of Medical Sciences, 60-572 Pozna\u0144, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3379-9106","authenticated-orcid":false,"given":"Aleksandra","family":"Szczepankiewicz","sequence":"additional","affiliation":[{"name":"Department of Pediatric Pneumonology, Allergy and Clinical Immunology, Institute of Pediatrics, Poznan University of Medical Sciences, Szpitalna 27\/33, 60-572 Pozna\u0144, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,9,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"e12709","DOI":"10.1111\/sji.12709","article-title":"B lymphocyte subsets and outcomes in patients with an initial diagnosis of transient hypogammaglobulinemia of infancy","volume":"88","author":"Eroglu","year":"2018","journal-title":"Scand. 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