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首页> 外文期刊>Cell and Tissue Research >Laminin and collagen modulate expression of the small leucine-rich proteoglycan fibromodulin in rat anterior pituitary gland
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Laminin and collagen modulate expression of the small leucine-rich proteoglycan fibromodulin in rat anterior pituitary gland

机译:Laminin和胶原蛋白调节大鼠前垂体腺体中小亮氨酸富含蛋白多糖纤维皂苷的表达

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摘要

The anterior pituitary is a complex organ consisting of five types of hormone-producing cells, non-hormone-producing cells such as folliculostellate (FS) cells and vascular cells (endothelial cells and pericytes). We have previously shown that FS cells and pericytes produce fibromodulin, a small leucine-rich proteoglycan (SLRP). SLRPs are major proteoglycans of the extracellular matrix (ECM) and are important in regulating cell signaling pathways and ECM assembly. However, the mechanism regulating fibromodulin expression in the anterior pituitary has not been elucidated. Here, we investigate whether fibromodulin expression is modulated by major anterior pituitary ECM components such as laminin and type I collagen. Using transgenic rats expressing green fluorescent protein (GFP) specifically in FS cells, we examine fibromodulin expression in GFP-positive (FS cells) and GFP-negative cells (e.g., pericytes, endocrine cells and endothelial cells). Immunostaining and Western blot analysis were used to assess protein expression in the presence and absence of laminin or type I collagen. We confirmed fibromodulin expression in the pituitary and observed the up-regulation of fibromodulin in FS cells in the presence of ECM components. However, neither laminin nor type I collagen affected expression in GFP-negative cells. This suggests that laminin and type I collagen support the function of FS cells by increasing fibromodulin protein expression in the anterior pituitary.
机译:前脑垂体是一种复杂的器官,由五种类型的激素产生细胞,产生非激素产生的细胞,如毛囊(FS)细胞和血管细胞(内皮细胞和周细胞)。我们之前已经表明,FS细胞和周细胞产生纤维蛋白,富含小亮氨酸的蛋白多糖(SLRP)。 SLRPS是细胞外基质(ECM)的主要蛋白多糖,并且在调节细胞信号传导途径和ECM组件方面很重要。然而,尚未阐明调节垂体垂体纤维蛋白表达的机制。在这里,我们研究了是否通过诸如层粘连蛋白和I型胶原蛋白的主要前脑垂体ECM组分来调节纤维调节蛋白表达。使用特异性在FS细胞中表达绿色荧光蛋白(GFP)的转基因大鼠,我们研究GFP阳性(FS细胞)和GFP阴性细胞中的纤维调节蛋白表达(例如,细胞,内分泌细胞和内皮细胞)。使用免疫染色和蛋白质印迹分析来评估蛋白质表达,在层粘连蛋白或I型胶原蛋白的存在和不存在中。我们在垂体中确认了纤维皂苷蛋白在ECM组分存在下观察到FS细胞中纤维蛋白的上调。然而,层蛋白也不是I型胶原蛋白在GFP阴性细胞中影响表达。这表明层蛋白和I型胶原蛋白通过增加垂体垂体中的纤维调节蛋白蛋白表达来支持FS细胞的功能。

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