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Effect of vascular endothelial growth factor on hepatic regenerative activity following partial hepatectomy in rats.

Abstract：

BACKGROUND/AIMS:Vascular endothelial growth factor (VEGF) is an angiogenic factor with a growth-promoting effect that is thought to be restricted to vascular endothelial cells. Its essential role during liver regeneration has yet to be determined. The aim of this study was to document the effect of exogenous VEGF administration on liver regeneration in rats undergoing submaximal hepatic resections. METHODS:Adult male Sprague-Dawley rats (n = 4/group) undergoing 30% partial hepatectomy were administered 200 ng VEGF165 intravenously and were sacrificed at 24, 36, and 48 h postoperatively. Liver regeneration was monitored by measuring the restituted liver mass, proliferating cell nuclear antigen (PCNA) immunostaining, and hepatic PCNA protein by Western blot. RESULTS:Changes in restituted liver mass 48 h postsurgery were more prominent, but did not differ statistically between VEGF-treated and control rats (47% vs. 29%; p<0.06). Nevertheless, PCNA immunostaining showed increased labeling index of hepatocytes, apparent at 36 and 48 h after partial hepatectomy (38% vs. 18% [p<0.041 and 42% vs. 11% [p<0.021], respectively). Hepatic PCNA proteins measured by Western blot showed a 3-fold increase in VEGF-treated rats 48 h postsurgery compared with controls (p<0.01). CONCLUSION:Exogenous VEGF administration early after partial hepatectomy stimulates liver regeneration in rats. Whether or not VEGF165 is a direct mitogen for hepatocytes remains to be determined.

journal_name

J Hepatol

journal_title

Journal of hepatology

authors

Assy N,Spira G,Paizi M,Shenkar L,Kraizer Y,Cohen T,Neufeld G,Dabbah B,Enat R,Baruch Y

doi

10.1016/s0168-8278(99)80147-0

subject

Has Abstract

pub_date

1999-05-01 00:00:00

pages

911-5

issue

5

eissn

0168-8278

issn

1600-0641

pii

S0168-8278(99)80147-0

journal_volume

30

pub_type

杂志文章

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