抗人心肌肌凝蛋白重链单克隆抗体在心肌缺血尸检例中的应用

为了更有效地检测早期及超早期心肌缺血性病变，对5例心肌组织材料进行了肌凝蛋白重链（MyosinH链）及肌红蛋白的免疫组织学染色，探讨了肌凝蛋白的染色情况、抗原分布、死后变化对染色的影响及心肌早期、超早期缺血的有无、程度及与死亡的关系。应用石蜡组织切片进行的抗人心肌肌凝蛋白重链免疫组织学染色，在病理学方面尚属首次，这种单克隆抗体对人的特异性高，无共集现象，在心肌缺血数分钟乃至十几分钟后即可发现缺血心肌细胞中肌凝蛋白重键的脱失像，是分析早期、超早期心肌缺血所致急死及其它原因死亡案例心肌缺血病变的有力方法。     

5个STR基因座的遗传多态性及其法医学应用

目的获得D11S4951、D11S4957、GATA193H05、D2S2951、D6S2421基因座的群体遗传学数据,并分析其在法医学中的应用价值。方法随机抽取成都地区汉族群体无血缘关系个体的静脉血,EDTA抗凝,用Chelex-100法提取DNA,应用PCR技术,扩增上述5个短串联重复序列基因座,聚丙烯酰胺凝胶垂直板电泳分型。结果5个基因座在中国成都汉族人群中分别发现了7、10、8、6、8个等位基因,5个基因座的基因型分布符合Hardy-Weinberg平衡(P>0.05)。各基因座的杂合度分别为0.743、0.772、0.833、0.650和0.800;非父排除概率分别为0.497、0.549、0.662、0.356和0.599;个人识别几率分别为0.863、0.912、0.947、0.829和0.931。结论5个基因座在中国汉族群体中具有法医学应用价值。     

日本参加TPP的“内忧”与“外患”

文章分析了日本参加TPP谈判问题所面临的困境及其对未来内政外交走向的影响。首先,在经济方面,日本因参加TPP谈判将面临是继续保护农业还是扩展制造业出口以振兴经济的矛盾;其次,在政治方面,由于参加TPP谈判日本将面临由于各利益集团冲突引起的国内政治矛盾;第三,在外交方面,因为参加TPP谈判,日本将与美国围绕以农业为主的市场开放的程度问题进行博弈,同时也陷入如何协调美国市场与中国市场的关系的矛盾。文章认为日本将不会在短期内解决这些矛盾,而只能在国内政界重新整合与国际格局进一步发展变化的过程中逐步得到解决。     

GC/MS衍生化测定精浆中游离支链氨基酸和果糖

目的 建立人精浆中支链氨基酸和果糖的气相质谱衍生化分析方法.方法 精液样本液化离心后,按精子活率的临床标准分为正常组和非正常组,经TMS微波衍生化,GC/MS分析两组支链氨基酸、果糖衍生物含量差异.结果 正常组与非正常组的缬氨酸,亮氨酸,异亮氨酸在相对含量上均有一定差异.正常组3种氨基酸相对含量高于非正常组.果糖分析观察到同样的特征,正常组相对含量高于非正常组.结论 精子活率低的精浆样本仍可检出支链氨基酸和果糖,其差异有助于无精子、少精子精斑的法医学鉴别.     

糖皮质激素不良反应在医疗纠纷鉴定中引发的思考

糖皮质激素是维持生命的必需品,药理作用广,不适当的使用或长期大剂量使用可导致不良反应和并发症甚至危及生命。糖皮质激素在为患者治疗疾病的同时,也使许多患者饱受全身器官、组织受损的痛苦。由于临床存在不合理应用,不可避免地对机体产生严重的危害,有的甚至产生严重的后果,轻者掩盖病情,延误诊断,重者致感染扩散,危及生命。     

An innovative transfer DNA experimental design and qPCR assay to identify primary,secondary, and tertiary DNA transfer

“Touch DNA” is a form of trace DNA that is presumed to be deposited when an individual touches something and leaves behind DNA-containing skin cells, sweat, or other fluids. While touch DNA is often the result of direct contact (i.e., primary transfer), it can also be indirectly transferred between surfaces or individuals (e.g., secondary or tertiary transfer). Even experts cannot distinguish between different types of transfer and do not fully understand which variables affect direct versus indirect transfer or how often each type of transfer occurs. In this study, we utilize an innovative protocol that combines a paired male and female transfer DNA experimental design with an Amelogenin qPCR assay to generate data on primary, secondary, and tertiary DNA transfer. We report frequencies of indirect DNA transfer and also investigate the potential effects of participant age, self-identified ethnicity, and skin conditions on DNA transfer. Out of 22 experimental trials, we detected primary transfer (male + female) in 71% of trials, secondary DNA transfer in 50% of trials, and tertiary DNA transfer in 27% of trials. No significant associations were found between primary DNA transfer and age, self-identified ancestry, or skin conditions, however, all individuals with sloughing skin conditions demonstrated primary DNA transfer and we suggest this variable be explored in larger samples. These results contribute to a better understanding of the conditions under which secondary and tertiary DNA transfer occurs and can be used to propose realistic DNA transfer scenarios in court cases.     

微滴式数字PCR技术用于生物样品种属鉴定和绝对定量

目的 运用微滴式数字PCR技术进行生物样品的种属鉴定和绝对定量.方法 选择人mtDNA两个编码基因ND4和16S rRNA,设计特异性引物与探针,用人来源及常见动物样本验证种属特异性,再用重组质粒和2组共16份人来源生物检材,倍比稀释.使用微滴式数字PCR技术进行种属检验和绝对定量,验证其灵敏度和稳定性.结果 人重组质粒FAM （ND4）可进行人来源样品的检测,其检测结果与各级稀释梯度基本吻合,微滴式数字PCR技术可以检测出反应体系中低至单拷贝的DNA.结论 微滴式数字PCR技术可以进行生物样品的种属鉴定和绝对定量,并具有很高的灵敏度和特异性,可应用于日常法医物证检验.     

Simplified Direct PCR Method for Reference Buccal Samples Using a Non-FTA Card by Omitting the Pretreatment Step

When using non-FTA cards in commercial multiplex STR kits for direct PCR, pretreatment steps with specific buffers are recommended. Here, we designed a rapid direct PCR method utilizing a non-FTA card, Oral Cell Sampling Kit, by omitting the pretreatment step involving Prep-n-Go™ Buffer, and it showed compatibility with the GlobalFiler™ Express PCR Amplification Kit, GlobalFiler™ PCR Amplification Kit, and PowerPlex^® Fusion system. To optimize the PCR conditions, we tested the method with different final PCR volumes and cycles. Finally, we conducted a performance test using 50 Korean buccal samples and confirmed the high performance of the method, detecting more than 90% of the samples with full profiles when using GlobalFiler™ PCR Amplification Kit and PowerPlex^® Fusion system at 29 cycles in a 10 μL final PCR volume. Thus, we report a simple direct PCR set-up to analyze reference samples collected using a non-FTA card manufactured in Korea.