摘要
目的探讨银屑病患者T细胞促发表皮动力学改变的机制。方法将皮肤组织与银屑病患者外周血T细胞混合培养,免疫组化法检测培养前、培养后第3天、第6天表皮c-myc﹑bcl-2及p53表达。结果未培养的银屑病患者皮损c-myc及p53表达增强,bcl-2表达减弱;银屑病正常皮肤表达无明显改变。银屑病正常皮肤及正常人皮肤分别与银屑病T细胞共培养后第3天,p53表达显著增强,共培养第6天后,c-myc表达显著增强,bcl-2表达显著降低,且银屑病正常皮肤与正常人皮肤受银屑病T细胞作用后二者间差异无显著性。结论c-myc、bcl-2及p53的异常表达与银屑病皮损表皮动力学紊乱密切相关;银屑病T细胞可影响表皮c-myc、bcl-2及p53的表达,从而影响表皮的增殖状态;银屑病发病的关键可能在于T细胞的异常,而不是表皮角质形成细胞。
Objective To investigate the mechanism of abnormal epidermal proliferation induced by psoriatic T lymphocytes.Methods Skin organ culture was established with psoriatic T cells mixed with epi-dermal cells.The expressions of c-myc,bcl-2and p53protein were examined with immunohistochemical method in epidermis before culture,on the3rd day and the6th day after culture.Results Significant up-regulation of c-myc and p53protein was found in psoriatic lesions,but bcl-2protein expression was rarely observed.The expressions of those proteins were normal in non-lesional psoriatic skin.The p53protein ex-pression was increased in normal skin and non-lesional psoriatic skin on the3rd day after culture with psori-atic T cells,and c-myc protein expression was enhanced while bcl-2was decreased on the6th day of co-culture.There was no significant difference of those proteins' expression between normal skin and non-lesion-al psoriatic skin stimulated by psoriatic T cells.Conclusions The abnormal expressions of c-myc,bcl-2and p53protein play an important role in abnormal epidermal proliferation and differentiation in psoriasis.Psoriatic T lymphocytes can influence c-myc,bcl-2and p53protein expression in normal skin and non-le-sional psoriatic skin.Pathogenic T cells rather than keratinocytes might be vital for initiation of psoriasis.
出处
《中华皮肤科杂志》
CAS
CSCD
北大核心
2004年第3期147-149,共3页
Chinese Journal of Dermatology
