CHANGES IN THE COMPOSITION OF CYTOSKELETAL AND CYTOCONTRACTILE PROTEINS OF RAT AORTIC SMOOTH-MUSCLE CELLS DURING AGING

被引：15

作者：

NIKKARI, ST ^{[1
]}

KOISTINAHO, J ^{[1
]}

JAAKKOLA, O ^{[1
]}

机构：

[1] UNIV TAMPERE,DEPT PUBL HLTH,GERONTOL SECT,SF-33101 TAMPERE,FINLAND

来源：

DIFFERENTIATION | 1990年 / 44卷 / 03期

关键词：

D O I：

10.1111/j.1432-0436.1990.tb00620.x

中图分类号：

Q2 [细胞生物学];

学科分类号：

071009 ; 090102 ;

摘要：

Cytoskeletal proteins are used as differentiation markers of vascular smooth muscle cells (SMC). To study possible changes in SMC phenotype during aging, cytoskeletal and cytocontractile proteins were quantified in the aortic intima-medias of 4-, 12-, 30-, and 36-month-old rats by one- and two-dimensional gel electrophoresis. The percentages of myosin and desmin in total protein decreased with age, while those of actin and vimentin remained unchanged. Immunohistochemical comparison of the aortas from 4- and 30-month-old rats showed that the reduction of desmin reflected a selective disappearance of desmin in some cells. There was an age-related increase in the proportion of β-actin at the expense of the α-isoform. Our results suggest an age-dependent modulation of the phenotype of vascular SMC towards the synthetic state, which is opposite to that observed during developmental differentiation. © 1990, International Society of Differentiation. All rights reserved.

引用

页码：216 / 221

页数：6

共 37 条

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