Actin pools and actin microfilament organization in cultured human endothelial cells after exposure to thrombin.

Abstract:

:Human umbilical vein endothelial cells (HUVEC) in primary confluent cultures lost their normal polygonal shape and assumed a 'contracted' appearance as judged by phase contrast microscopy when exposed to highly purified bovine thrombin (2 N.I.H. u/ml). Total actin in thrombin-exposed cells did not differ from that of control cells, as measured by the deoxyribonuclease I inhibition assay. However, the monomeric actin pool (unpolymerized actin) in thrombin-treated HUVEC was c. 15% smaller (P less than 0.01) than in control HUVEC (in which it represented approximately 50% of total actin). Transmission electron microscopy showed that thrombin-stimulated HUVEC contained more and thicker bundles of filamentous actin than control cells. Polymerization of actin and reorganization of actin microfilaments may contribute to the shape changes of HUVEC induced by thrombin.

journal_name

Br J Haematol

authors

Galdal KS,Evensen SA,Høglund AS,Nilsen E

doi

10.1111/j.1365-2141.1984.tb06108.x

subject

Has Abstract

pub_date

1984-12-01 00:00:00

pages

617-25

issue

4

eissn

0007-1048

issn

1365-2141

journal_volume

58

pub_type

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