Mast cell chymase regulates dermal mast cell number in mice.

Mast cell chymase regulates dermal mast cell number in mice.
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肥大细胞糜酶调节小鼠真皮肥大细胞数量。

DOI:
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发表时间:
2002
期刊:
Biochemical and Biophysical Research Communications - BBRC
影响因子:
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通讯作者:
Y. Fukuda
Y. Fukuda
中科院分区:
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文献类型:
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作者:
Y. Tomimori;Tsuyoshi Muto;H. Fukami;Kayo Saito;C. Horikawa;N. Tsuruoka;Kyoko Yamashiro;Masayuki Saito;Namino Sugiura;Motoo Sumida;S. Kakutani;Y. Fukuda

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糜酶抑制剂以剂量依赖性方式减少2,4-二硝基氟苯诱导的皮炎中真皮肥大细胞数量的增加。皮内注射人糜酶到小鼠耳显著增加组胺含量,皮肤中肥大细胞数量的标志。这些结果提示肥大细胞释放的糜酶可能以正反馈的方式参与肥大细胞局部聚集。免疫组织化学分析显示,糜酶皮内注射减少皮肤角质形成细胞表面干细胞因子(SCF)的表达。此外,人角质形成细胞与糜蛋白酶在体外孵育导致SCF释放到培养基中。由于可溶性SCF被认为调节肥大细胞的数量,因此糜酶诱导的肥大细胞积聚可能通过糜酶处理表皮角质形成细胞上的膜结合SCF的能力而发生。
Chymase inhibitor reduced the increase in the number of dermal mast cells in 2,4-dinitrofluorobenzene-induced dermatitis in a dose-dependent manner. Intradermal injection of human chymase to mouse ear significantly increased histamine content, the marker for mast cell number in the skin. These results suggest that chymase released by mast cells may participate in local mast cell accumulation in a positive feedback fashion. Immunohistochemical analysis revealed that the intradermal injection of chymase reduces expression of stem cell factor (SCF) on surface of the skin keratinocytes. In addition, incubation of human keratinocytes with chymase in vitro resulted in release of SCF into the culture medium. Since soluble SCF is thought to regulate mast cell number, the chymase-induced mast cell accumulation may occur via the ability of chymase to process membrane-bound SCF on the epidermal keratinocytes.
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