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Detection of Ⅴ,Ⅲ and Ⅰ type collagens of Dermal Tissues in Skin Lesions of Patients with Systemic Sclerosis and Its Implication

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Journal of Huazhong University of Science and Technology(Medical Sciences) 2008年第5期28卷 599-603页

作者：刘彤张键 Department of Dermatology First Affiliated Hospital Medical School Xi'an Jiaotong University

This study investigated the contents and distribution of collagen Ⅴ （Col Ⅴ） in skin lesions of the patients with systemic sclerosis （SSc） and its roles in the pathogenesis. The contents and distribution for α1 chain of collagen type Ⅰ, Ⅲ and v [α1 （Ⅰ）, α1 （Ⅲ） and α1 （Ⅴ）] in skin lesions of 36 patients with SSc （9 cases of mild fibrosis, 14 moderate, and 13 severe） were detected by using im- munohistochemical SP method. Six cases of normal skin tissues served as controls. The results showed that there was diffuse distribution for three kinds of collagens in dermis. The deep staining α1 （Ⅰ） and α1 （Ⅲ） masses or bands were seen in reticular layer, while α1 （Ⅴ） was distributed more ho- mogeneously. From control to weak, moderate and severe fibrosis stages, α1 （Ⅰ）, α1 （Ⅲ） and α1 （v） showed a gradually increased trend in skin lesions （P〈0.05）. α1 （Ⅴ） was obviously elevated in skin lesions at early stage and persisted in whole fibrotic process and risen in greater contents, while α1 （Ⅰ） and α1 （Ⅲ） were to go higher late and were apparently elevated at moderate and late stages. Com- pared with α1 （Ⅰ）, α1 （Ⅴ） took leading increase at early stage in skin lesions （P〈0.01）, and had more elevated contents than α1 （Ⅲ） at moderate and late stages. The fibrotic changes in dermal reticular layer occurred earlier than those in papillary layer, and the abnormalities of α1 （Ⅴ）/α1 （I） ratio ap- peared before α1 （Ⅲ）/α1 （Ⅰ） ratio. It was concluded that a lot of α1 （Ⅴ） began to deposit in greater contents prior to α1 （Ⅰ） and α1 （Ⅲ） at early stage in SSc and persisted in whole fibrotic process. The changes of α1 （Ⅴ） contents in reticular layer occurred earlier than those in papillary layer, and it sug- gested that the fibrosis in reticular layer appeared earlier.

关键词： sclerosis, systemic v type collagen immunohistochemical staining

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