Immunohistochemical Localization of Nitric Oxide Synthase in Normal Human Skin: Expression of Endothelial‐type and Inducible‐type Nitric Oxide Synthase in Keratinocytes

Immunohistochemical Localization of Nitric Oxide Synthase in Normal Human Skin: Expression of Endothelial‐type and Inducible‐type Nitric Oxide Synthase in Keratinocytes
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正常人皮肤一氧化氮合酶的免疫组织化学定位:角质形成细胞中内皮型和诱导型一氧化氮合酶的表达

DOI:
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发表时间:
1997
期刊:
Journal of dermatology (Print)
影响因子:
--
通讯作者:
H. Ueda
H. Ueda
中科院分区:
--
文献类型:
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作者:
Y. Shimizu;M. Sakai;Y. Umemura;H. Ueda

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一氧化氮(NO)是多种生物功能的重要介体。一氧化氮由一氧化氮合酶催化L-精氨酸产生,有三种亚型,内皮型和脑型为构成酶,诱导型一氧化氮合酶在刺激后表达。我们用免疫组织化学技术和免疫印迹法检测了正常皮肤组织中一氧化氮合酶的表达。在人皮肤中,表皮角质形成细胞和外根鞘不仅用eNOS抗体标记,而且用iNOS抗体标记。免疫印迹法证实表皮角质形成细胞有eNOS和iNOS蛋白表达。ENOS免疫反应见于内皮细胞、成纤维细胞、直毛肌、大汗腺、小汗管和小汗腺。肥大细胞呈BNOS免疫反应阳性。其他类型的细胞均未见抗bnos抗体染色。我们目前的发现表明,正常人皮肤的表皮角质形成细胞同时含有eNOS和iNOS。
Nitric oxide (NO) is a critical mediator of various biological functions. NO is generated from L‐arginine by nitric oxide synthase (NOS), which has three isoforms; endothelial‐type NOS (eNOS) and brain‐type NOS (bNOS) are constitutive enzymes, and inducible‐type NOS (iNOS) is expressed after stimulation. We investigated the expression of NOS in normal human skin by an immunohistochemical technique and western blotting analysis. In human skin, epidermal keratinocytes and the outer root sheath were labeled with not only eNOS antibody but also with iNOS antibody. Both eNOS and iNOS protein in epidermal keratinocytes were confirmed by western blotting. eNOS immunoreactivity was observed in endothelial cells, fibroblasts, the arrector pili muscle, apocrine secretory gland, eccrine coiled duct, and eccrine secretory gland. bNOS immunoreactivity was observed in mast cells. No staining with anti‐bNOS antibody was observed in any other cell type. Our present findings suggest that epidermal keratinocytes in normal human skin contain both eNOS and iNOS.
DOI: 10.1152/ajpcell.1993.265.1.c299
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影响因子: --
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