态规则、结构清晰、无肿胀，无变性坏死，排列整齐，从而最大程度地保留其基质的功能。    本研究表明：脱细胞真皮基质制备过程可有效地去除皮肤中的细胞成分，完整保留基底膜和真皮基质，形成相对无免疫活性的脱细胞真皮基质。   【参考文献】    1  Livesey SA. US Patent.#5，336，616.Lifecell Corporation，1994， 23-24.    2  Castagnolic C， Stella M， Magliacani G， et al. Anomalous express of HLA class II molecules on keratinocytes and fibroblasts in hypertrophic scars consequent to thermal therapy. Clin Exp Immunol，1990，82:350-354.    3  Sedmak DD， Orosz CG. The role of vascular endothelial cells in transplantation. Arch Pathol Lab Med，1991，115:260-265.    4  Yukan RA.Variable antigenicity of lyophilized allogeneic and lyophilized xenogeneic skin in guinea pigs. J Peridont Re，1997，12:197-201.    5  Kischer CW， Shetlar MR， Chvapil M， et al. Hypertrophic scars in keloids: a review and new concept concerning their orientation. Scan Electron Microsc，1982，4:1699-1713.

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