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首页> 外文期刊>Journal of Cellular Physiology >CRF1 receptor splicing in epidermal keratinocytes: potential biological role and environmental regulations.
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CRF1 receptor splicing in epidermal keratinocytes: potential biological role and environmental regulations.

机译:表皮角化细胞CRF1受体拼接:潜在的生物作用和环境规定。

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摘要

Corticotropin releasing factor receptor type 1 (CRF1), a coordinator of the body responses to stress, is also expressed in human skin, where it undergoes alternative splicing. Since the epidermis is continuously exposed to the environmental stress, human keratinocytes were chosen to study the biological role of CRF1 alternative splicing. The expression pattern of CRF1 isoforms depended on cell density, presence or absence of serum, and exposure to ultraviolet irradiation (UVR). Only two isoforms alpha and c were predominantly localized to the cell membrane, with only CRF1alpha being efficient in stimulating cAMP responding element (CRE). CRF1d, f and g had intracellular localization, showing no or very low (g) activation of CRE. The co-expression of CRF1alpha with d, f or g resulted in intracellular retention of both isoforms suggesting dimerization confirmed by detection of high molecular weight complexes. The soluble isoforms e and h were diffusely distributed in the cytoplasm or localized to the ER,respectively, and additionally found in culture medium. These findings suggest that alternatively spliced CRF1 isoforms can interact and modify CRF1alpha subcellular localization, thus affecting its activity. We suggest that alternative splicing of CRF1 may play an important role in the regulation of skin cell phenotype with potential implications in pathology.
机译:促肾上腺皮质激素释放因子受体1型(CRF1),协调身体的反应在人类皮肤压力,也表示,它发生选择性剪接。表皮不断暴露环境压力,人类角质细胞选择研究CRF1的生物学作用选择性剪接。CRF1亚型取决于细胞密度,存在或缺乏血清,暴露于紫外线辐射(紫外线辐射)。主要是局部细胞吗膜,只有CRF1alpha效率刺激阵营回应元素(CRE)。f和g细胞内定位,显示没有或很低(g) CRE激活。co-expression CRF1alpha的d, f和g导致细胞内保留的亚型表明证实了二聚作用高分子量复合物的检测。可溶性e亚型和h是广泛的分布在细胞质或本地化呃,分别,另外发现培养基。或者拼接CRF1亚型可以互动和修改CRF1alpha亚细胞定位、从而影响其活动。可变剪接CRF1可能发挥重要的作用在皮肤细胞的调控表型与潜在影响病理

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