{"id":259254,"date":"2025-07-18T19:58:22","date_gmt":"2025-07-18T19:58:22","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=259254"},"modified":"2025-07-18T19:58:24","modified_gmt":"2025-07-18T19:58:24","slug":"which-cells-bear-cd4-and-cd25-markers","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/07\/18\/which-cells-bear-cd4-and-cd25-markers\/","title":{"rendered":"Which cells bear CD4 and CD25 markers"},"content":{"rendered":"\n<p>Which cells bear CD4 and CD25 markers? <\/p>\n\n\n\n<p>a.) Regulatory T cells b.) Th2 cells c.) Cytotoxic T cells d.) Th1 cells<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\">The correct answer and explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p>The correct answer is <strong>a) Regulatory T cells<\/strong>.<\/p>\n\n\n\n<p>Regulatory T cells (Tregs) are a specialized subset of T cells that play a critical role in maintaining immune tolerance and preventing autoimmune diseases. These cells bear both <strong>CD4<\/strong> and <strong>CD25<\/strong> markers on their surface.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>CD4<\/strong> is a co-receptor molecule expressed on helper T cells, including Tregs, and plays a vital role in recognizing antigens presented by MHC class II molecules on antigen-presenting cells (APCs). The presence of CD4 allows these cells to interact effectively with APCs during immune responses.<\/li>\n\n\n\n<li><strong>CD25<\/strong> is the alpha chain of the interleukin-2 (IL-2) receptor, which is essential for the survival and function of Tregs. IL-2 is a cytokine that stimulates T cell proliferation, and CD25+ Tregs use IL-2 in a way that helps them regulate immune responses by suppressing the activation of other immune cells.<\/li>\n<\/ul>\n\n\n\n<p>Regulatory T cells are involved in maintaining immune homeostasis by suppressing excessive immune responses that could lead to inflammation or autoimmunity. They are crucial in preventing the immune system from attacking self-tissues and in limiting the severity of immune responses to foreign pathogens.<\/p>\n\n\n\n<p>In contrast:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Th2 cells<\/strong> (option b) also express CD4, but they do not typically bear CD25.<\/li>\n\n\n\n<li><strong>Cytotoxic T cells<\/strong> (option c) do not express either CD4 or CD25; they are primarily characterized by their expression of CD8.<\/li>\n\n\n\n<li><strong>Th1 cells<\/strong> (option d) also express CD4, but like Th2 cells, they do not typically express CD25.<\/li>\n<\/ul>\n\n\n\n<p>Thus, CD4 and CD25 are markers that are most strongly associated with regulatory T cells, which are essential for immune regulation and tolerance.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Which cells bear CD4 and CD25 markers? a.) Regulatory T cells b.) Th2 cells c.) Cytotoxic T cells d.) Th1 cells The correct answer and explanation is: The correct answer is a) Regulatory T cells. Regulatory T cells (Tregs) are a specialized subset of T cells that play a critical role in maintaining immune tolerance [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-259254","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/259254","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=259254"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/259254\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=259254"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=259254"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=259254"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}