Taghizadeh Hadi, Taghizadehghalehjoughi Ali, Yildirim Serkan, Ozkaraca Mustafa, Genc Sidika, Yeni Yesim, Mokresh Muhammed Yasser, Hacimuftuoglu Ahmet, Tsatsakis Aristidis, Tsarouhas Konstantinos
Tissue Mechanics Laboratory, Faculty of Biomedical Engineering, Sahand University of Technology, Tabriz 51335-1996, Iran.
Department of Pharmacology, Faculty of Medicine, Bilecik Seyh Edebali University, 11230 Bilecik, Turkey.
J Pers Med. 2022 Sep 28;12(10):1602. doi: 10.3390/jpm12101602.
Hypertension, as a primary risk factor for many fatal disorders, is prevalent in the elderly. There is wide literature on hypertension dealing with its biological and/or biochemical aspects; however, limited research is available on the multifactorial nature of hypertension from a mechanobiological standpoint. This study intended to study in parallel histopathological alterations and deviated protein expressions with the mechanical behavior of the hypertensive tissues. The Goldblatt (2K1C) method was chosen for induction of renovascular hypertension in rabbits. The microstructural and immunohistological characteristics of the aortic, pancreatic, and brain vasculature were investigated. The mechanical properties of the aortic tissue were also evaluated using biaxial tensile tests. Our findings indicated severe hypertrophy of the hypertensive vessels and declined content of intact smooth muscle cells. Most of the collagen I content of the wall was compromised and less functional type III collagen was highly expressed. Reversed collagen I to collagen III ratio was the main contributor to the hypertrophic and less stiff hypertensive vessel walls. The multifactorial nature of hypertension is illustrated, and smooth muscle cell detachment is identified as the sign of described degenerative cascades all along the arterial tree.
高血压作为许多致命疾病的主要风险因素,在老年人中普遍存在。关于高血压的生物学和/或生物化学方面有大量文献;然而,从机械生物学角度对高血压多因素性质的研究有限。本研究旨在同时研究高血压组织的组织病理学改变、偏离的蛋白质表达及其力学行为。选用戈德布拉特(2K1C)法诱导家兔肾血管性高血压。研究了主动脉、胰腺和脑血管的微观结构和免疫组织学特征。还使用双轴拉伸试验评估了主动脉组织的力学性能。我们的研究结果表明,高血压血管出现严重肥大,完整平滑肌细胞含量下降。血管壁的大部分I型胶原蛋白受损,功能性较差的III型胶原蛋白高表达。I型胶原蛋白与III型胶原蛋白的比例倒置是高血压血管壁肥厚和僵硬程度降低的主要原因。高血压的多因素性质得到了说明,平滑肌细胞脱离被确定为整个动脉树中所述退行性级联反应的标志。