Cerebral Venous Collagen Remodeling in a Modified White Matter Lesions Animal Model. (26th December 2017)

• Record Type: Journal Article
• Authors: Lin, Jing; Lan, Linfang; Wang, Dilong; Qiu, Baoshan; Fan, Yuhua
• Is Part Of: Neuroscience. Volume 367(2017)
• Page Start: 72
• Page End: 84
• Publication Date: 2017-12-26
• Subjects: 2k2c two kidney-two clip -- AP alkaline phosphatase -- BBB blood–brain barrier -- BCCAO bilateral common carotid artery occlusion -- LA leukoaraiosis -- MBP myelin basic protein -- modified 2VO modified two vessel occlusion -- RHRSP stroke-prone renovascular hypertensive rats -- SBP systolic blood pressure -- SHRSP stroke-prone spontaneously hypertensive rats -- WMHs white matter hyperintensities -- WMLs white matter lesions -- α-SMA α-smooth muscle actin; white matter lesions -- venous collagen deposition -- stroke-prone renovascular hypertensive rat -- modified bilateral carotid artery occlusion -- smooth muscle -- cognitive impairment; Neurochemistry -- Periodicals; Neurophysiology -- Periodicals; Neurology -- Periodicals; Neurochimie -- Périodiques; Neurophysiologie -- Périodiques; Neurochemistry; Neurophysiology; Electronic journals; Periodicals; Electronic journals; 612.8
• DOI: 10.1016/j.neuroscience.2017.10.031
• Languages: English
• ISSNs: 0306-4522

Abstract

Highlights: We establish a modified WMLs model (RHRSP/modified 2VO) mimicking the expected characteristics of WMLs in human beings. Modified 2VO in RHRSP improves the stability and extent of WMLs without obvious rise in mortality rate compared to RHRSP. We differentiate cerebral veins from arteries through the presence of smooth muscle in tissue sections. We demonstrate that small venous collagen remodeling likely plays an important role in the white matter damage. Abstract: To mimic the expected pathological changes of white matter lesions (WMLs) and increase the stability, we applied modified two-vessel occlusion (modified 2VO) (1-week interval bilateral carotid artery occlusion) in stroke-prone renovascular hypertensive rats (RHRSP) and established a modified WMLs model (RHRSP/modified 2VO) that compared their phenotypes with RHRSP and sham-operated rats. In addition, we tried to differentiate small veins from small arteries through the presence of smooth muscle to study the pathological changes of small veins detailed in the model. RHRSP/modified 2VO rats showed higher stability and more extensive white matter damage without an obvious increase in mortality rate at 12 weeks after the modified 2VO operation compared to RHRSP rats. RHRSP/modified 2VO rats showed more severe small venous collagen deposition than RHRSP rats, and the majority of the deposition was collagen I and IV rather than collagen III. In addition, RHRSP/modified 2VO rats possessed cognitive impairment, mild wall thickness and blood–brain barrier disruption. Our findings suggest that the modified WMLs model (RHRSP/modified 2VO) mimics cognitive impairment and small vessel pathological changes similar to WMLs in humans. Differentiating small veins from small arteries through smooth muscle is feasible, and marked small venous deposition may play an important role in the hypertensive white matter lesions.