当前位置： SCI文献检索 > BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS期刊下所有文献 > Biointerface topography regulates phenotypic switching and cell apoptosis in vascular smooth muscle cells.

Biointerface topography regulates phenotypic switching and cell apoptosis in vascular smooth muscle cells.

Abstract：

BACKGROUND:In-stent restenosis (ISR) is a complex disease that occurs after coronary stenting procedures. The development of quality materials and improvement of our understanding on significant factors regulating ISR are essential for enhancing prognosis. Vascular smooth muscle cells (VSMCs) are the main constituent cells of blood vessel walls, and dysfunction of VMSCs can exacerbate ISR. Accordingly, in this study, we explored the influence of wrinkled material topography on the biological functions of VSMCs. METHODS:Polydimethylsiloxane with a wrinkled topography was synthesized using elastomer base and crosslinking and observed by atomic force microscopy. VSMC proliferation, apoptosis, and morphology were determined by Cell Counting Kit-8 assays, fluorescence-assisted cell sorting, and phalloidin staining. α-Smooth muscle actin (α-SMA), major histocompatibility complex (MHC), and calponin 1 (CNN-1) expression levels were measured by quantitative real-time polymerase chain reaction and western blotting. Moreover, p53 and cleaved caspase-3 expression levels were evaluated by western blotting in VSMCs to assess apoptotic induction. RESULTS:Surface topographies were not associated with a clear orientation or elongation of VSMCs. The number of cells was increased on wrinkled surfaces (0.7 μm in amplitude, and 3 μm in wavelength [W3]) compared with that on other surfaces, contributing to continuously increased cell proliferation. Moreover, interactions of VSMCs with the W3 surface suppressed phenotypic switching, resulting in ISR via regulation of α-SMA, calponin-1, and SM-MHC expression. The surface with an amplitude of 0.05 μm and a wavelength of 0.5 μm (W0.5) promoted apoptosis by inducing caspase 3 and p53 activities. CONCLUSION:Introduction of aligned topographies on biomaterial scaffolds could provide physical cues to modulate VSMC responses for engineering vascular constructs. Materials with wrinkled topographies could have applications in the development of stents to reduce ISR.

journal_name

Biochem Biophys Res Commun

journal_title

Biochemical and biophysical research communications

authors

Han L,Yin Q,Yang L,van Rijn P,Yang Y,Liu Y,Li M,Yan M,Zhou Q,Yu T,Lian Z

doi

10.1016/j.bbrc.2020.03.038

subject

Has Abstract

pub_date

2020-06-04 00:00:00

pages

841-847

issue

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(20)30517-9

journal_volume

526

pub_type

杂志文章

在线工具

Biointerface topography regulates phenotypic switching and cell apoptosis in vascular smooth muscle cells.