{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,12]],"date-time":"2026-03-12T05:20:27Z","timestamp":1773292827749,"version":"3.50.1"},"reference-count":42,"publisher":"Wiley","issue":"9","license":[{"start":{"date-parts":[[2006,10,10]],"date-time":"2006-10-10T00:00:00Z","timestamp":1160438400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Liver International"],"published-print":{"date-parts":[[2006,11]]},"abstract":"<jats:p><jats:bold>Abstract: Purpose: <\/jats:bold> To analyze the gene expression pattern in rat hepatic fibrogenesis and further assess the role of some key genes during the pathological process.<\/jats:p><jats:p><jats:bold>Methods: <\/jats:bold> Hepatic fibrosis was induced by intraperitoneal injection of dimethylnitrosamine or carbon tetrachloride (CCl<jats:sub>4<\/jats:sub>) injection subcutaneously in rats, and identification of the hepatic fibrosis related genes with cDNA microarray was performed. After some key genes up\u2010regulated during the development of hepatic fibrosis were screened and confirmed, their effects on the function of the activated rat hepatic stellate cells (HSC) were assessed using the small interfering RNA (siRNA) technique.<\/jats:p><jats:p><jats:bold>Results: <\/jats:bold> Using an Atlas rat cDNA array, a number of differentially expressed genes in fibrotic liver tissues were identified compared with non\u2010diseased control. A total of 15 genes predominantly associated with the mitogen\u2010activated protein kinase (MAPK) signal transduction pathway were upregulated in the fibrotic liver. Immunohistochemical study revealed that the expressions of both extracellular signal\u2010regulated kinases (ERK) and ribosomal protein S6 kinase (RSK), two of the key genes in the MAPK pathway, were remarkably induced, which was closely correlated to that of collagen types I and III during the development of hepatic fibrosis. Transfection of siRNA targeting ERK1 mRNA (siERK1) into HSC led to a 66% and 72% reduction of ERK1 mRNA and protein expression, respectively. Furthermore, siERK1 exerted the inhibition of the proliferation of HSC, accompanied by the induction of HSC apoptosis and reduction of collagen types I and III. In addition, siERK1 abolished the effect of platelet\u2010derived growth factor\u2010BB on the proliferation of HSC.<\/jats:p><jats:p><jats:bold>Conclusions: <\/jats:bold> The present study provided strong evidence for the participation of the MAPK pathway in the pathogenesis of hepatic fibrosis. Selective targeting of ERK1 inhibitors to HSC might present as a novel strategy for the treatment of hepatic fibrosis.<\/jats:p>","DOI":"10.1111\/j.1478-3231.2006.01353.x","type":"journal-article","created":{"date-parts":[[2006,10,10]],"date-time":"2006-10-10T19:07:02Z","timestamp":1160507222000},"page":"1126-1137","source":"Crossref","is-referenced-by-count":27,"title":["Differential expression genes analyzed by cDNA array in the regulation of rat hepatic 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