肝星状细胞
纤维连接蛋白
层粘连蛋白
细胞外基质
肌成纤维细胞
结蛋白
胰腺
生物
分子生物学
纤维化
IV型胶原
病理
化学
内分泌学
细胞生物学
免疫学
医学
免疫组织化学
波形蛋白
作者
Max G. Bachem,Erik Schneider,H. Groß,H Weidenbach,Roland M. Schmid,André Menke,Marco Siech,H G Beger,A. Grünert,Guido Adler
标识
DOI:10.1016/s0016-5085(98)70209-4
摘要
Until now, the basic matrix-producing cell type responsible for pancreas fibrosis has not been identified. In this report, retinoid-containing pancreatic stellate cells (PSCs) in rat and human pancreas are described, and morphological and biochemical similarities to hepatic stellate cells are shown.Electron and immunofluorescence microscopy (collagen types I and III, fibronectin, laminin, alpha-actin, and desmin) was performed using pancreatic tissue and cultured PSCs. Extracellular matrix synthesis was shown using quantitative immunoassay and Northern blot analysis.PSCs are located in interlobular areas and in interacinar regions. Early primary cultured PSCs contain retinol and fatty acid retinyl-esters. Addition of retinol to passaged cells resulted in retinol uptake and esterification. During primary culture, the cells changed from a quiescent fat-storing phenotype to a highly synthetic myofibroblast-like cell expressing iso-alpha-smooth muscle actin (>90%) and desmin (20%-40%) and showing strong positive staining with antibodies to collagen types I and III, fibronectin, and laminin. As determined on protein and messenger RNA level, serum growth factors stimulated the synthesis of collagen type I and fibronectin.The identification of PSCs, particularly in fibrotic areas, and the similarities of these cells to hepatic stellate cells suggest that PSCs participate in the development of pancreas fibrosis.
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