Related Experiment Video
Updated: Aug 5, 2026
11:13
Porcine Model of Infrarenal Abdominal Aortic Aneurysm
Published on: November 21, 2019
Inflammatory abdominal aortic aneurysm and the associated T-cell reaction: a case study
J Lieberman1, J S Scheib, P B Googe
1Department of Surgery, University of Tennessee Medical Center, Knoxville 37920.
Journal of Vascular Surgery
|March 1, 1992
Summary
Inflammatory abdominal aortic aneurysms involve an immune response with elevated T cells in blood and tissue. This immune response, particularly CD4 T cells, decreases after aneurysm repair, indicating a link between inflammation and disease progression.
Area of Science:
- Immunology
- Vascular Biology
- Cardiovascular Research
Background:
- Abdominal aortic aneurysm (AAA) is a life-threatening condition characterized by inflammation.
- The specific immune cell populations and their role in AAA pathogenesis require further elucidation.
- Understanding the systemic immune response in AAA is crucial for developing targeted therapies.
Observation:
- Lymphocyte phenotypes were analyzed in peripheral blood, aortic aneurysm wall, and perianeurysmal tissue.
- Activated T cells were significantly increased in all three sampled locations.
- A specific subset of T cells, CD4, was elevated in both AAA tissue and peripheral blood.
Findings:
- The study identified a distinct immune signature associated with inflammatory AAA.
- Peripheral blood analysis revealed elevated CD4 T cells, mirroring findings in the aneurysm tissue.
- Aneurysm repair led to the normalization of T-cell subsets in the peripheral blood.
Implications:
- The findings suggest that peripheral blood immune cell analysis can serve as a biomarker for AAA-associated inflammation.
- The observed regression of the immune response post-repair highlights the dynamic nature of AAA inflammation.
- Targeting specific immune pathways, particularly CD4 T cells, may offer therapeutic strategies for AAA.
More Related Videos
04:30Investigating Aortic Valve Calcification via Isolation and Culture of T Lymphocytes using Feeder Cells from Irradiated Buffy Coat
Published on: February 4, 2021
06:50A Model of Acute Lung Injury Following Visceral Ischemia-Reperfusion by Supra-Coeliac Aortic Cross Clamping in Rats
Published on: August 15, 2025
Related Concept Videos
01:30Aneurysm I: Introduction
An aortic aneurysm is a localized outpouching or dilation at a weak point in the artery wall. It may involve different parts of the aorta, such as the abdominal aorta, aortic arch, or thoracic aorta.Etiological factorsSeveral disorders are associated with aortic aneurysms.Congenital causes, such as primary connective tissue disorders like Marfan syndrome, impact the integrity and strength of connective tissues, notably affecting the aorta. Marfan syndrome is a genetic disorder that specifically...
01:21Aneurysm II: Clinical Manifestations and Diagnostic Studies
Thoracic, aortic arch and abdominal aneurysms are significant vascular conditions that can present with various clinical manifestations and lead to serious complications. Understanding these manifestations and the appropriate diagnostic studies is essential for effective management and treatment.Thoracic Aortic AneurysmsThoracic aortic aneurysms often remain asymptomatic until they reach a size that impinges on adjacent structures. They typically cause deep, diffuse chest pain that radiates to...
01:26Aneurysm III: Interprofessional Care
Aneurysm management involves either conservative medical therapy or surgical intervention, depending on the size and symptoms of the aneurysm. Conservative management is generally reserved for smaller, asymptomatic aneurysms, while larger or symptomatic aneurysms often necessitate surgical repair.Conservative Medical TherapyFor small, asymptomatic aneurysms, particularly abdominal aortic aneurysms (AAA) less than 5.5 centimeters in diameter, conservative medical therapy is recommended. This...
01:12Chronic Inflammation: Introduction
Chronic inflammation is a prolonged, dysregulated immune response that persists for weeks to years when the inciting stimulus is difficult to eradicate or when self‑antigens drive ongoing reactivity. Morphologically, it is defined by mononuclear cell infiltration, progressive tissue destruction, and concurrent attempts at healing via angiogenesis and fibrosis. Compared with acute inflammation, edema is less prominent while cellular infiltration predominates; triggers include persistent...
01:20Inflammatory Bowel Disease II: Ulcerative Colitis
Ulcerative colitis is a chronic inflammatory disorder of the colon characterized by continuous mucosal inflammation that typically begins in the rectum and extends proximally in a uniform pattern. Its pathogenesis involves a complex interplay of genetic predisposition, immune dysregulation, and environmental influences. These factors converge to impair the colon’s epithelial defenses and promote an exaggerated inflammatory response against luminal contents.Breakdown of the Mucosal BarrierA...
01:25Inflammatory Bowel Disease III: Crohn's Disease
Crohn’s disease is a chronic, relapsing form of inflammatory bowel disease characterized by segmental, transmural inflammation that can affect any part of the gastrointestinal tract. Its pathogenesis arises from a combination of genetic susceptibility, environmental exposures, epithelial barrier dysfunction, and immune dysregulation. Together, these factors lead to an exaggerated immune response against components of the gut microbiome.Genetic and Environmental InfluencesMultiple genetic...