兔皮肤钝器伤IL-1β、COX-2和MCP-1 mRNA表达与法医学应用

目的应用荧光定量PCR技术检测兔皮肤钝器伤后IL-1β、COX-2和MCP-1mRNA的时序性表达规律,分析其与损伤时间的关系。方法分别在兔耳皮肤钝器伤后<0.5h,0.5h,1h,2h,3h,4h,5h,6h,8h,12h,24h,1d,3d,7d和死后10min,0.5h,1h取材,一步法提取组织总RNA,逆转录合成cDNA第一条链,荧光定量PCR检测IL-1β、COX-2和MCP-1mRNA逆转录合成第一条cDNA链的拷贝数,作统计学分析。结果IL-1βmRNA在钝器伤后<0.5h表达显著增强(P<0.001),0.5h达到峰值,至第2d降至基本水平;COX-2mRNA于创伤后0.5h表达显著增强(P<0.05)并持续强表达至24h开始下降,第2d降至正常;MCP-1 mRNA在钝器伤后于1h表达显著增强(P<0.05),于3h出现表达峰,至第3d降至正常;3个指标在死后各时间组与正常对照无明显表达差异。结论检测皮肤IL-1β、COX-2和MCP-1mRNA可对早期损伤时间的推断提供帮助,并且这三个指标都可以鉴别生前伤和死后伤。     

正交设计在实时定量PCR检测条件优化中的应用

目的探索正交设计在实时定量PCR检测条件优化中的应用，找出扩增ICAM-1基因的最佳条件。方法建立大鼠皮肤损伤模型，采用正交设计实时定量PCR的各影响条件，提取损伤处皮肤组织总RNA反转录成cDNA，cDNA作为模板，通过特异性引物扩增ICAM-1基因。对扩增曲线和融解曲线制定评分标准，量化不同实验条件下的扩增结果并进行统计分析。结果退火温度、模板量和引物浓度直接影响扩增效果，但三因素间无相互作用。结果经统计学分析表明退火温度61℃、模板cDNA用量0．4μg和引物终浓度150μmol／L为实时定量PCR检测ICAM-1基因的最佳条件组合。结论正交设计是一种切实可行、快速经济的实时定量PCR检测条件优化方法。     

气功对经络系统的平衡调节作用

The unbalance levels (UL) and the deviation levels (DL)of the 72 cases'' skin resistance for the three Yin and three Yang meridians of upper limbs were examined and analysed simulaneously by jinluo unbalance instrument ( JUI). The results as follows, after Qigong, variety of conscious symptoms of the cases take a evident turn for the improvement. The UL of Pericardium Meridian ( P相似文献   

小鼠皮肤切创愈合过程中caspase-9、-3表达的研究

目的研究caspase-9、-3在小鼠皮肤切创愈合过程中的表达及其变化规律。方法在小鼠背部正中制作皮肤全层切创模型,应用免疫组化染色技术观察切创及切创周边区内caspase-9、-3的表达情况,以无切创的小鼠皮肤作为对照。结果对照组中caspase-9、-3表达于表皮层,毛囊及皮脂腺。伤后3h损伤区及损伤周边区中可见少量多核粒细胞表达caspase-9、-3,6~24h,部分浸润的多核粒细胞和单核细胞caspase-9、-3阳性,此后caspase-9、-3阳性细胞逐渐以单核细胞和成纤维细胞为主。伤后caspase-9、-3阳性细胞率逐渐升高并在3d达到高峰,此后逐渐下降,至14d最低。结论caspase-9、-3可能引发正常小鼠皮肤表皮、毛囊和皮脂腺细胞的凋亡并参与正常皮肤细胞的自我更新;在小鼠皮肤切创愈合过程中,caspase-9、-3在多核粒细胞、单核细胞及成纤维细胞中表达,其时序性变化规律可望用于皮肤切创损伤时间的判定。     

Analysis of genetic polymorphisms associated with the presence of freckles for phenotypic prediction

The prediction of externally visible characteristics (EVCs) is a commonly used practice by the forensic sciences as an important resource in the investigation of criminal cases in which the identity of perpetrators or victims is unknown or even to recognize decomposed cadavers. With this purpose, genetic markers associated with pigmentation traits have been widely studied by forensic scientists and, nowadays, it is possible to predict phenotypic characteristics such as hair, eyes and skin colour, as well as the presence of skin freckles by analysing single nucleotide polymorphisms (SNPs). In this study, we analysed the association of six SNPs located in pigmentation genes to the presence of freckles in individuals from the Brazilian population for forensic DNA phenotyping. The study was based within the context of a larger project on a population sample of 534 adult Brazilians of both sexes and different skin colours. DNA was extracted from peripheral blood and genotyped using the TaqMan® OpenArray® Real-Time PCR System (ThermoFischer Scientific) technique. Statistical analyses were carried out with the R software (version 4.0.2). As for the results obtained, three SNPs were shown to be statistically associated to the freckling, rs12203592, rs1800404 and rs222847, with CT, AG and AA genotypes being the main contributors, respectively. Variables such as sex of the individuals and skin colour were found to also contribute to the manifestation of this pigmentation trait. Further statistical analyses will be carried out to evaluate the possibility of using the SNPs in this study for phenotyping prediction of the Brazilian population, improving existing DNA phenotyping models in forensic sciences.     

The detection and persistence of Cannabis sativa DNA on skin

The presence of Cannabis sativa DNA was detected on the skin of persons who have recently handled both leaf and resinous material. The persistence of C. sativa DNA was examined on the skin. The subjects were asked to either repeatedly rub their hands on their trousers, place their hands repeatedly into their pockets or wash their hands in soap and water. After rubbing the hands on trousers or placing them in pockets C. sativa DNA could still be detected. No DNA could be detected after washing the hands.     

Fifty years of creativity,crisis, and cancer in Uganda

Abstract

This article tells the story of the Uganda Cancer Institute over the past 50 years. I discuss the fundamental dynamism of research collaborations and the ways in which they bring vital yet partial investments in improving the capacity of medical facilities in sub-Saharan Africa. I explore the ways in which patient populations and the needs of caretakers themselves shape research collaborations. I also show how extreme oscillations in the capacity to conduct oncology research and provide care were (and are) tied not only to shifting international research priorities, but also to broader upheaval and periods of stability in Uganda since independence in 1962. Rather than dwelling on the debris, ruins, or an emptying of capacity in the health sector in Africa, this article highlights how this experimental infrastructure in East Africa not only survived, but also fundamentally shaped a culture of care and oncology practice that lived on.     

内异止痛方直肠用药对子宫内膜异位症痛经患者血清癌抗原125和血管内皮生长因子的影响

目的 观察内异止痛方直肠用药治疗子宫内膜异位症痛经的临床疗效及其对血清癌抗原125（cancer antigen 125, CA125）、血管内皮生长因子（vascular endothelial growth factor, VEGF）的影响。方法 将60例子宫内膜异位症痛经患者随机分为治疗组与对照组各30例。治疗组予内异止痛方灌肠,对照组予散结镇痛胶囊口服。两组均以15 d为1个疗程,连续治疗3个疗程,随访3个月后评估临床疗效及治疗前后CA125、VEGF的变化。结果 两组治疗后血清CA125、VEGF水平均较治疗前明显下降（P<0.05）,治疗组CA125、VEGF水平下降程度明显大于对照组（P<0.05）;治疗组临床疗效优于对照组,差异具有统计学意义（P<0.05）。结论 内异止痛方直肠用药通过降低血清CA125和VEGF水平治疗子宫内膜异位症痛经。     

艾叶/茶叶水提物促进皮肤感染模型大鼠创面愈合的协同作用及机制研究

目的 探讨艾叶水提物和茶叶水提物对皮肤感染模型大鼠的协同治疗作用及其机制。方法 实验分两个部分进行：第一部分将皮肤感染模型大鼠随机分为模型组、西药组、艾叶水提物组、茶叶水提物组、2∶1组（艾叶水提物与茶叶水提物质量比为2∶1）、1∶1组（艾叶水提物与茶叶水提物质量比为1∶1）和1∶2组（艾叶水提物与茶叶水提物质量比为1∶2）,每组7只。比较治疗前后各组大鼠创面面积;ELISA法检测各组大鼠血清肿瘤坏死因子-α（tumor necrosis factor-α,TNF-α）、白细胞介素（interleukin, IL）-1β、IL-18水平。第二部分随机选取7只大鼠为正常组,将皮肤感染模型大鼠随机分为模型组、2∶1组（艾叶水提物与茶叶水提物质量比为2∶1）,每组7只。Western blot法检测各组大鼠皮肤组织黑色素瘤缺乏因子2（absent in melanoma 2, AIM2）、含有CARD的凋亡相关斑点样蛋白(apoptosis-associated speck-like protein containing CARD,ASC)和Caspase-1蛋白表达水平;ELISA法检测各组大鼠血清AIM2、ASC、Caspase-1及IL-1β、IL-18水平。结果 第一部分,与模型组比较,西药组、艾叶水提物组、茶叶水提物组和3个不同比例组感染创口收缩明显,创面面积明显减小,且促炎因子TNF-α、IL-1β、IL-18的表达水平均显著降低（P＜0.05）。其中西药组、2∶1组效果更明显,两组促炎因子TNF-α、IL-1β水平比较,差异无统计学意义（P＞0.05）。第二部分,与正常组比较,模型组感染创面组织中AIM2、ASC、Caspase-1蛋白表达水平和血清IL-1、IL-18水平均显著升高（P＜0.05）。与模型组比较,2∶1组感染创面组织中AIM2、ASC、Caspase-1蛋白表达水平和血清IL-1、IL-18水平均显著降低（P＜0.05）。结论 艾叶水提物和茶叶水提物对治疗皮肤感染模型大鼠存在协同作用,艾叶水提物与茶叶水提物质量比为2∶1是最优比例。其协同机制可能与AIM2炎症小体活化和细胞焦亡通路有关。