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从发育到衰老过程中弹性纤维的变化。对动脉结构-功能的影响及治疗前景。

Rise and fall of elastic fibers from development to aging. Consequences on arterial structure-function and therapeutical perspectives.

机构信息

Univ. Grenoble Alpes, Inserm U1042, CHU Grenoble Alpes, HP2, 38000 Grenoble, France.

INSERM, U1148, and Hopital Bichat-Claude Bernard, 46 rue Henri Huchard, 75877 Paris, France.

出版信息

Matrix Biol. 2019 Nov;84:41-56. doi: 10.1016/j.matbio.2019.08.005. Epub 2019 Sep 4.

Abstract

In the arteries of vertebrates, evolution has given rise to resilient macromolecular structures, elastin and elastic fibers, capable of sustaining an elevated blood pressure and smoothening the discontinuous blood flow and pressure generated by the heart. Elastic fibers are produced only during development and childhood, before being progressively degraded by mechanical stress and enzymatic activities during adulthood and aging. During this period, arterial elastic fiber calcification and loading of lipids also occur, all of these events conducting to arteriosclerosis. This leads to a progressive dysfunction of the large elastic arteries inducing elevated blood pressure as well as altered hemodynamics and organ perfusion, which induce more global malfunctions of the body during normal aging. Additionally, some arterial conditions occur more frequently with advancing age, such as atherosclerosis or aneurysms, which are called age-related diseases or pathological aging. The physiological or pathological degradation of elastic fibers and function of elastic arteries seemed to be rather inevitable over time. However, during the recent years, different molecules - including several ATP-dependent potassium channel openers, such as minoxidil - have been shown to re-induce elastin production and elastic fiber assembly, leading to improvements in the arterial structure and function or in organ perfusion. This review summarizes the changes in the arterial elastic fibers and structure from development until aging, and presents some of the potential pharmacotherapies leading to elastic fiber neosynthesis and arterial function improvement.

摘要

在脊椎动物的动脉中,进化产生了具有弹性的大分子结构——弹性蛋白和弹性纤维,它们能够承受较高的血压,并使心脏产生的不连续血流和压力平稳化。弹性纤维仅在发育和儿童期产生,然后在成年和衰老期间逐渐被机械应力和酶活性降解。在此期间,动脉弹性纤维也会发生钙化和脂质堆积,所有这些事件都会导致动脉硬化。这会导致大动脉弹性纤维的功能逐渐失调,引起血压升高以及血液动力学和器官灌注改变,从而导致在正常衰老过程中身体出现更多的全身性功能障碍。此外,一些动脉疾病随着年龄的增长而更频繁地发生,如动脉粥样硬化或动脉瘤,这些疾病被称为与年龄相关的疾病或病理性衰老。随着时间的推移,弹性纤维的生理或病理性降解以及弹性动脉的功能似乎是不可避免的。然而,近年来,已经发现了多种分子——包括几种 ATP 依赖性钾通道开放剂,如米诺地尔——可以重新诱导弹性蛋白的产生和弹性纤维的组装,从而改善动脉结构和功能或器官灌注。本综述总结了从发育到衰老过程中动脉弹性纤维和结构的变化,并介绍了一些可能导致弹性纤维新生合成和动脉功能改善的潜在药物治疗方法。

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