赛霉安阴道栓对家兔阴道粘膜刺激试验

目的 观察赛霉安阴道栓对阴道粘膜的刺激反应.方法 以家兔阴道每日持续给药4 h,每日1.0 g/只,连续给药10日,同时设赋型剂对照组,观察对阴道的刺激反应.结果 经肉眼临床观察未见明显水肿、糜烂、出血、溃疡等病理改变,组织病理学镜检赛霉安阴道栓对家兔阴道粘膜刺激反应程度为无刺激.结论 赛霉安阴道栓对阴道粘膜无刺激性.     

异种去细胞真皮基质在体内转归的初步研究

目的 初步研究异种（猪）去细胞真皮基质在体内的转归。方法 经曲通（Triton）X-100、胰蛋白酶处理得到异种（猪）去细胞真皮基质后，将其包埋于SD大鼠皮下，于术后1、2、4、6、8、12、16、20和30周观察异种（猪）去细胞真皮基质的大体形态及组织学变化。结果 制备的异种（猪）去细胞真皮基质去细胞成分，胶原纤维排列有序，基底膜结构完整。大体观察异种（猪）去细胞真皮基质原始形态随时间延长而逐渐模糊．组织学观察异种（猪）去细胞真皮基质1周以炎性细胞浸润为主，以后成纤维细胞、毛细血管逐渐增多，真皮胶原排列逐渐规则、致密。结论 异种（猪）去细胞真皮基质可在体内作为支架长期存在，并可诱导自身成纤维细胞及毛细血管有序长入。     

Analysis of the skin of mice humanized for the immune system

Development of new immunotherapeutic strategies relies on the ability to activate the right cells at the right place and at the right moment and on the capacity of these cells to home to the right organ(s). Skin delivery has shown high potency for immunotherapeutic administration. However, an adequate in vivo model of human skin immunity is still a critical bottleneck. We demonstrated here that the skin of human immune system mice is colonized by human hematopoietic cells, mainly human T cells and that complementation with human antigen‐presenting cells at the vaccination site allowed the induction of an immune response.     

The Sox2: GFP+/− knock‐in mouse model does not faithfully recapitulate Sox2 expression in skin

Hair follicle heterogeneity may be regulated by distinct dermal papillae (DP) that represent mesenchymal lineages, which can be defined by Sox2 expression. However, it was recently shown that GFP expression in the Sox2: GFP+/? mouse model occurs in the DPs of all hair follicle types, challenging the idea that hair follicle heterogeneity can be defined by DP heterogeneity. Here, we investigated whether the knock‐in mouse model faithfully expresses GFP when compared to endogenous Sox2 expression. The results reveal that GFP expression is aberrant in both the infundibulum of hair follicles and in the DPs. Consequently, we provide an explanation for the aberrant expression of the knock‐in gene based on the original cloning strategy for the mouse model in the context of a newly identified regulatory element associated within the coding region of Sox2.     

异体脱细胞真皮基质加自体刃厚皮复合移植远期随访评价

目的 评价异体ADM+自体刃厚皮复合移植的临床远期效果.方法 选择2001年3月-2008年10月,笔者单位收治的19例行异体ADM+自体刃厚皮复合移植患者为复合移植组(34个创面),同期9例行自体刃厚皮移植患者为对照组(11个创面).患者术后均随访2年以上.随访时,在曼彻斯特瘢痕量表的基础上设计随访对象评估表,评估移植皮肤的颜色、平整度、质地、挛缩、感觉、并发症情况,分值1～4分,得分越高、情况越差;采用温哥华瘢痕量表评估供皮区瘢痕形成情况;发放问卷调查患者满意度、移植期内健康记录;组织病理学方法观察其中4例患者皮肤组织结构.采用中立位法描述术前、术后及随访时患者关节活动范围.对数据进行非参数秩和检验、t检验或x2检验.结果 (1)复合移植组皮肤平整度、挛缩、质地评分分别为(1.6±0.5)、(1.8±0.8)、(1.5±0.8)分,显著低于对照组的(2.0±0.7)、(2.2±0.9)、(2.3±0.7)分(Z值分别为-2.058、-2.220、-2.323,P值均小于0.05);2组皮肤颜色、感觉、并发症评分结果相近(Z值分别为-0.628、-0.428、-2.520,P值均大于0.05).(2)复合移植组仅1个供皮区部分区域有轻度瘢痕.(3)复合移植组和对照组患者在疼痛、瘙痒和满意度方面比较,差异均无统计学意义(x2值分别为0.187、0.019、2.628,P值均大于0.05).(4)病理结果显示,手部复合移植后2年可见神经纤维结构,ADM在受体内未引起强烈的炎症反应.(5)复合移植组11处关节部位功能得到恢复或改善,另2处需再次手术.对照组2处关节部位均明显挛缩.结论 异体ADM+自体刃厚皮复合移植在防止瘢痕挛缩,改善功能及外观方面效果明显,长期存留于成人和儿童患者体内均未出现安全问题.     

以胚鼠脱细胞真皮构建口腔黏膜固有层的实验研究

目的:探讨以胚鼠脱细胞真皮构建组织工程化口腔黏膜固有层的可行性。方法:取胚鼠皮肤制备脱细胞真皮支架,将体外培养的人口腔黏膜成纤维细胞复合入胚鼠脱细胞真皮支架中,分别于接种后的1、4、7 d行HE染色、荧光显微镜及电镜检测。结果:胚鼠脱细胞真皮支架行HE染色显示未见细胞残留,表皮-真皮结合面保存波浪状基底膜样结构,HE、荧光显微镜及电镜检测均显示成纤维细胞复合入胚鼠脱细胞真皮支架后可黏附、生长、增殖。结论:以胚鼠脱细胞真皮体外构建的口腔黏膜固有层具有较好的组织构架,为进一步研究成纤维细胞-上皮细胞相互作用机制和构建全层口腔黏膜提供良好的实验模型。     

In Vitro Direct and Indirect Cytotoxicity Comparative Analysis of One Pre-Hydrated versus One Dried Acellular Porcine Dermal Matrix

Aim: The aim of the present study was to compare the direct and indirect cytotoxicity of a porcine dried acellular dermal matrix (PDADM) versus a porcine hydrated acellular dermal matrix (PHADM) in vitro. Both are used for periodontal and peri-implant soft tissue regeneration. Materials and methods: Two standard direct cytotoxicity tests—namely, the Trypan exclusion method (TEM) and the reagent WST-1 test (4-3-[4-iodophenyl]-2-[4-nitrophenyl]-2H-[5-tetrazolio]-1,3-benzol-desulphonated)—were performed using human primary mesenchymal stem cells (HPMSCs) seeded directly onto a PDADM and PHADM after seven days. Two standard indirect cytotoxicity tests—namely, lactate dehydrogenase (LTT) and MTT (3-[4,5-dimethyl-2-thiazolyl]-2,5-diphenyl-2H-tetrazoliumbromide)—were performed using HPMSCs cultivated in eluates from the matrices incubated for 0.16 h (10 min), 1 h, and 24 h in a serum-free cell culture medium. Results: The WST and the TEM tests revealed significantly lower direct cytotoxicity values of HPMSCs on the PHADM compared with the PDADM. The indirect cytotoxicity levels were low for both the PHADM and PDADM, peaking in short-term eluates and decreasing with longer incubation times. However, they were lower for the PHADM with a statistically significant difference (p < 0.005). Conclusions: The results of the current study demonstrated a different biologic behavior between the PHADM and the PDADM, with the hydrated form showing a lower direct and indirect cytotoxicity.     

癌痛贴巴布剂的皮肤刺激性及毒性实验研究

目的:评价癌痛贴巴布剂的安全性,从而保证临床用药安全。方法:皮肤刺激性试验观察单次和多次用药后,癌痛贴巴布剂组与空白巴布剂组豚鼠皮肤红斑、水肿的发生情况。急性毒性试验比较癌痛贴巴布剂实验组与空白巴布剂对照组豚鼠在用药14 d内的一般情况、体质量变化、中毒表现和死亡数,并心脏取血观察癌痛巴布剂在短期内对豚鼠血常规、血生化指标有无明显改变。长期毒性试验是将2组实验组豚鼠连续敷贴癌痛贴45 d后选一组心脏取血,与对照组比较血常规、血生化指标有无明显差异;另一组停药饲养14 d后再心脏取血,与对照组比较血常规、血生化指标有无明显差异,以评价停药后一段时间内有无影响。结果:癌痛贴巴布剂对豚鼠一般状况无明显影响;对豚鼠皮肤无明显刺激性作用;对豚鼠体重无明显影响(P>0.05);急性毒性试验中豚鼠心脏取血检测血常规、血生化指标,实验组和对照组无显著性差异(P>0.05)。长期毒性试验中豚鼠心脏取血检测血常规、血生化指标,实验组和对照组无显著性差异(P>0.05)。结论:癌痛贴巴布剂的皮肤刺激性试验、急性毒性试验及长期毒性试验均未显示毒性作用,预期临床应用安全性良好。     

酯类双缩合化合物的合成及抗炎活性研究

目的:合成新型的丹皮酚衍生物,并研究其抗炎活性。方法:以丹皮酚、乙醇胺、非甾体抗炎药为原料,经修饰后与非甾体抗炎药缩合,合成6个目标化合物。以布洛芬为对照,二甲苯致炎法考察目标化合物的抗炎活性,并且探究目标化合物小鼠胃肠道的不良反应。结果:化合物的结构经¹H-NMR及MS得到确证,6个目标化合物均能显著减轻小鼠的耳肿胀,与阳性对照组相比,都具有良好的抗炎效果,同时能明显减少小鼠炎症组织中的前列腺素E₂(PGE₂)的含量。结论:合成6个丹皮酚衍生物,抗炎活性均明显强于布洛芬,且胃肠道不良反应明显降低。