Open AccessVASCULAR CONNECTIVE TISSUE CHANGES IN EXPERIMENTAL PORTACAVAL ANASTOMOSIS
Author(s) -
Takiya Christina,
Louis Dominique,
Clement Gérald,
Grimaud JeanAlexis
Publication year - 1986
Publication title -
acta patholigica japonica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.73
H-Index - 74
ISSN - 0001-6632
DOI - 10.1111/j.1440-1827.1986.tb02248.x
Subject(s) - connective tissue , portacaval anastomosis , pathology , basement membrane , reticular fiber , fibrosis , portal hypertension , matrix (chemical analysis) , perisinusoidal space , cirrhosis , anastomosis , hepatic stellate cell , lobules of liver , biology , medicine , chemistry , hepatocyte , biochemistry , chromatography , psychiatry , in vitro
Hepatic vascular changes are generally associated to fibrotic lesions of the liver but their role in the development and extension of fibrosis is not well known. By performing a portacaval anastomosis in rats, a proliferation of hepatic vessels was attained progressively, comparable to proliferations seen in cirrhosis and schistosomiasis. Such a modification of the hepatic vasculature was accompanied by changes in the connective matrix of the liver, mainly related to the vascular walls. Moreover, sinusoidal capillarization was detected at the electron microscopical level whereas no alterations could be seen neither in the distribution nor in the quality of the connective matrix proteins with Immunofluorescence technique. The only modification detected by light microscopy, at this zone, was the shrinked aspect of reticulin fibers which could be related to the important liver atrophy provoked by the anastomosis. It can be assumed that in liver pathology, selective changes occur in the connective matrix components depending on the type of injury. Necrotic and inflammatory processes lead mainly to the deposition of interstitial collagens and associated proteins, related to a diffuse stroma reaction resultant from activation of specific cell populations whereas in portacaval anastomosis, a selective increase of vascular connective matrix (mainly basement membrane components) occurs as a direct consequence of vessel proliferation.