Objective: To investigate the mechanism of the effect of Moist Exposed Burn Therapy (MEBT) and Moist Exposed Burn Ointment (MEBO) on the spontaneous repair and healing of superficial third degree burn wound involving fatty layer. Method: A series of skin tissue samples were taken from deep burn wounds of 2 cases. Immunocytochemistry method, biotin avidin DCS system, and indirect immunofluorescence technique were applied. Mouse anti human keratin type 19 monoclonal antibody was used to detect regenerative epidermal stem cells in wound tissues. Results: Epidermal regenerative stem cells emerged at 24 hours post burn, and the number of epidermal regenerative stem cell increased on day 4 post burn. On days 7 and 14 post burn, the number of epidermal stem cells increased to the peak level. On days 21 and 28 post burn, it decreased and disappeared gradually as burn wound progressed to healing. Conclusion: MEBT/MEBO has the effect of promoting the activation and proliferation of epidermal regenerative stem cells in the residual viable tissue of superficial full thickness burn wound, and these stem cells play an unique role in spontaneous wound healing of deep burn.

间接免疫荧光技术检测尖锐湿疣中的人乳头瘤病毒

目的:间接免疫荧光技术在临床与基础研究中的应用较为广泛,但却极少有人用于尖锐湿疣的检测,我们旨在验证该方法是否可行,并将之与PCR方法相比较,以了解其准确性和敏感性.材料和方法:60例临床确诊的尖锐湿疣疣体标本均取自性病门诊,采取疣体印片,用小鼠抗人的HPV6型作为I抗,FTTC标记的山羊抗鼠IgG作为Ⅱ抗.在荧光显微镜下检查.剩余标本消化后做PCR,证实有无人乳头瘤病毒(Human papillomavirus,HPV)的DNA,并用RFLP方法进行分型.结果:在34例尖锐湿疣标本中检测到特异性荧光,阳性率为56.67%,而用PCR方法共检测到58例阳性,阳性率为96.67%.用X2检验比较二者的阳性率,P＜0.01.主要感染类型为6和11型,占98.28%.结论:间接免疫荧光技术针对的是乳头瘤HPV的衣壳蛋白,能检测有完整衣壳的成熟HPV,操作简便,有望用于宫颈涂片的常规检查,以筛查带HPV者,对预防宫颈癌提供帮助.但敏感性不及PCR技术.

AIM:To establish the endoplasmic reticulum stress ( ERS) cell model in vascular smooth muscle cells ( VSMCs) of Sprague-Dawley (SD) rats.METHODS:Under sterile condition, the coronary arteries were isolated from SD rats .The primary VSMCs were cultured by tissue-sticking method , and observed the basic morphological characteristics under optical microscope .The marker proteins of VSMCs including α-smooth muscle actin (α-SMA) and smooth muscle myosin heavy chain ( SM-MHC) were identified by immuno-fluorescence technique .VSMCs were treated with thapsigargin (0.5, 1 and 2 μmol/L) for 24 h, and the expression levels of binding immunoglobulin protein (BiP) and C/EBP homologus protein (CHOP), the marker molecules of ERS, were detected using Western blotting.RESULTS:VSMCs climbed out from coronary artery tissues after about six days , and the cells had a nice state and formed the VSMC-like typical "peak valley".The results of immunofluorescence technique show that the marker proteins of VSMCs ,α-SMA and SM-MHC were expressed significantly .The results of Western blotting show that the protein expression levels of BiP and CHOP were increased by thapsigargin in a dose-dependent manner .CONCLUSION:VSMCs can be successfully cultured by tissue-sticking method and built the ERS model induced by thapsigargin .