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Home / Health News / Know the potential biomarkers of cerebral aneurysm risk

Know the potential biomarkers of cerebral aneurysm risk

Turns out, aneurysm occurs anywhere throughout the circulatory system, but most commonly develop along the aorta and in blood vessels of the brain.

By: ANI   | | Published: August 25, 2018 1:02 pm
Tags: Blood vessels  Brain  Cerebrovascular disease  RNA  
Brain power
याददाश्त मजबूत बनाए रखने के लिए बादाम को काफी उपयोगी माना जाता है। © Shutterstock

Washington D.C. [USA], Aug 25 (ANI): Turns out, aneurysm occurs anywhere throughout the circulatory system, but most commonly develop along the aorta and in blood vessels of the brain. Also Read - Opioid addiction can cause permanent brain changes

Expansive arterial remodeling (EAR) comprises a genetically programmed biological response designed to restore homeostatic levels of arterial wall stress after an increase in vessel flow load occurs. The magnitude and rate of EAR reactions relative to local hemodynamic stress fields and the tensile strength of vascular tissue determine whether the process will result in a stable mural structure (adaptive remodeling) or an unstable mural structure that progresses to form an aneurysm (maladaptive remodeling). Also Read - Women at greater risk of heart disease as their blood vessels age faster than those of men



A recent study revealed the molecular mechanisms underlying adaptive and maladaptive remodeling of cerebral arteries for the first time. Also Read - New study states drops in income can harm your brain

In this study, investigators flow loaded the basilar artery in rats by performing bilateral carotid artery ligation. Flow-induced changes in basilar artery morphometry and histology were correlated with changes in mRNA expression and protein expression. These alterations in mural structure and biology were revealed by comparison of flow loaded basilar arteries with basilar arteries from rats that underwent sham surgery. The adaptive and maladaptive remodeling responses were differentiated by comparing the results from an aneurysm prone inbred strain of rats to an aneurysm resistant inbred strain of rats.

The study revealed 24 genes that were differentially expressed between strains in the absence of flow loading (resting state). More than half of these genes have previously been associated with pathological vascular phenotypes, and more than a third have specifically been associated with aneurysmal pathology.

Numerous flow-induced genes were revealed by this study, including a group of 8 genes that showed very strong flow induced expression conserved in both inbred strains. A group of 9 genes showed very strong flow induced expression with major differences between an aneurysm prone inbred rats and the aneurysm resistant inbred rats. These genes are considered to play major roles in maladaptive cerebrovascular remodeling responses that lead to mural destabilization and cerebral aneurysm formation. Three of these genes including the Tgfb3, Ldha and Rgs16 genes have specifically been associated with aneurysmal pathology in prior studies.

The newly-discovered maladaptive cerebrovascular remodeling genes revealed by this research may enable the development of new diagnostic biomarker tests for patients at increased risk of cerebral aneurysm formation.

The products of maladaptive cerebrovascular remodeling genes may eventually prove to be high yield drug targets for targeted arterial wall stabilizing therapies. Such therapies may be particularly beneficial for individuals at high risk of aneurysm formation, including patients with severe hypertension, unilateral carotid artery occlusions, cerebral arteriovenous malformations and aneurysmal cerebral arteriopathies such as Tuberous Sclerosis, Alagille syndrome and Sickle cell disease.

The findings published in the Journal of Current Neurovascular Research. (ANI)

This is published unedited from the ANI feed.

Published : August 25, 2018 1:02 pm
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