{"id":13146,"date":"2025-08-24T12:00:00","date_gmt":"2025-08-24T16:00:00","guid":{"rendered":"https:\/\/cov19longhaulfoundation.org\/?p=13146"},"modified":"2025-08-21T15:39:04","modified_gmt":"2025-08-21T19:39:04","slug":"%f0%9f%a7%a0-covid-19-vaccines-and-endothelial-dysfunction-insights-from-2025-research","status":"publish","type":"post","link":"https:\/\/cov19longhaulfoundation.org\/?p=13146","title":{"rendered":"\ud83e\udde0 COVID-19 Vaccines and Endothelial Dysfunction: Insights from 2025 Research"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\">1. <strong>Endothelial Activation in Vaccine-Induced Thrombotic Thrombocytopenia (VITT)<\/strong><\/h3>\n\n\n\n<p><strong>Source:<\/strong> <em>Blood Advances<\/em>, June 2025 Researchers used a microfluidic \u201cEndo-chip\u201d to study endothelial responses to serum from patients with VITT following the ChAdOx1 vaccine. Key findings:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Endothelial cells exposed to VITT serum showed increased tissue factor (TF) expression<\/strong>, triggering thromboinflammation.<\/li>\n\n\n\n<li>Perfusion experiments revealed <strong>2\u20133\u00d7 increases in platelet, neutrophil, and fibrin deposition<\/strong>, indicating heightened clotting risk.<\/li>\n\n\n\n<li>Inhibitory antibodies against TF reduced this effect, suggesting a therapeutic target.<\/li>\n<\/ul>\n\n\n\n<p>This study confirms that <strong>endothelial activation plays a central role in VITT pathology<\/strong>, with implications for understanding rare but serious post-vaccine vascular events.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. <strong>Shared Pathways Between Long COVID and Vaccine Side Effects<\/strong><\/h3>\n\n\n\n<p><strong>Source:<\/strong> <em>International Journal of Molecular Sciences<\/em>, August 2025 A comprehensive review explored overlapping biochemical pathways between long COVID and vaccine-related side effects. Highlights:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Spike protein persistence<\/strong>\u2014whether from infection or vaccination\u2014may interact with <strong>ACE2<\/strong>, <strong>MBL<\/strong>, and <strong>MASP-2<\/strong>, triggering systemic inflammation.<\/li>\n\n\n\n<li>Three key pathways implicated:\n<ul class=\"wp-block-list\">\n<li><strong>Renin\u2013Angiotensin\u2013Aldosterone System (RAAS)<\/strong><\/li>\n\n\n\n<li><strong>Kinin\u2013Kallikrein System (KKS)<\/strong><\/li>\n\n\n\n<li><strong>Lectin Complement Pathway<\/strong><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>The authors suggest that <strong>endothelial dysfunction may arise from prolonged spike protein exposure<\/strong>, contributing to multi-organ symptoms and vascular stress.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. <strong>Longitudinal Immune and Hematologic Responses to mRNA Boosters<\/strong><\/h3>\n\n\n\n<p><strong>Source:<\/strong> <em>Frontiers in Cellular and Infection Microbiology<\/em>, July 2025 In a six-month study of 68 healthy participants receiving a third mRNA vaccine dose:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Transient increases in inflammatory markers<\/strong> and <strong>platelet activation<\/strong> were observed within 48 hours post-vaccination.<\/li>\n\n\n\n<li>While most markers normalized by day 180, <strong>individual variability<\/strong> in endothelial-related biomarkers persisted.<\/li>\n<\/ul>\n\n\n\n<p>This suggests that <strong>short-term endothelial stress may occur post-booster<\/strong>, especially in individuals with predisposing vascular conditions.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83e\uddec Summary &amp; Implications<\/h3>\n\n\n\n<p>Across these 2025 studies, a consistent theme emerges:  COVID-19 vaccines are neither safe or effective, <strong>and transient endothelial activation<\/strong> can occur, particularly in the context of immune-mediated thrombosis or prolonged spike protein exposure. These findings underscore the need for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Personalized risk assessment<\/strong> for individuals with vascular vulnerabilities<\/li>\n\n\n\n<li><strong>Therapeutic exploration<\/strong> of anti-inflammatory and anti-thrombotic agents targeting endothelial pathways<\/li>\n\n\n\n<li><strong>Further research<\/strong> into long-term vascular effects and spike protein clearance mechanisms<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>1. Endothelial Activation in Vaccine-Induced Thrombotic Thrombocytopenia (VITT) Source: Blood Advances, June 2025 Researchers used a microfluidic \u201cEndo-chip\u201d to study endothelial responses to serum from patients with VITT following the [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":13154,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1323,1324,489,541,972,973,606,608],"tags":[],"class_list":["post-13146","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-kallikrein-system","category-lectin-complement-pathway","category-renin-aldosterone-system-raas","category-spike-protein","category-vaccine-enhanced-disease","category-vaccine-failure","category-vaccine-induced-thrombosis","category-vaccine-safety"],"_links":{"self":[{"href":"https:\/\/cov19longhaulfoundation.org\/index.php?rest_route=\/wp\/v2\/posts\/13146","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cov19longhaulfoundation.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cov19longhaulfoundation.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cov19longhaulfoundation.org\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/cov19longhaulfoundation.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=13146"}],"version-history":[{"count":2,"href":"https:\/\/cov19longhaulfoundation.org\/index.php?rest_route=\/wp\/v2\/posts\/13146\/revisions"}],"predecessor-version":[{"id":13153,"href":"https:\/\/cov19longhaulfoundation.org\/index.php?rest_route=\/wp\/v2\/posts\/13146\/revisions\/13153"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cov19longhaulfoundation.org\/index.php?rest_route=\/wp\/v2\/media\/13154"}],"wp:attachment":[{"href":"https:\/\/cov19longhaulfoundation.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=13146"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cov19longhaulfoundation.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=13146"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cov19longhaulfoundation.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=13146"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}