Objective Using circRNA detection technology to explore the feasibility of the application of circRNA molecules in the identification of body fluids. Methods Prepare three kinds of body fluid samples: semen, saliva and vaginal secretions. Total RNA was extracted from Qiagen RNeasy Micro kit and digested by RNase R to obtain circRNA. Reverse transcription PCR amplification and agarose gel electrophoresis analysis were performed to detect target products. Results CircRNA can be detected in all prepared samples. These results showed that the circRNA was widely present in common body fluids of forensic medicine, and had some application value. Conclusion The detection for circRNA can be compatible with the existing DNA detection technology, and its tissue specificity can be used as a new marker for identification of body fluid and has important research value.%目的 利用circRNA检测技术,探索circRNA分子应用于体液斑迹鉴定的可行性.方法 制备精液、唾液、阴道分泌物三种体液斑迹样本,以Qiagen RNeasy Micro试剂盒提取总RNA,经RNase R消化后得到circRNA,进行逆转录PCR扩增,琼脂糖凝胶电泳检测分析. 结果 制备的体液斑迹样本均可检测到circRNA分子,提示circRNA普遍存在于法医常见体液斑迹中,具备一定的应用价值. 结论 circRNA的检测可与现有DNA检测技术兼容,利用其组织特异性,可成为体液斑迹鉴定的新标记,具备重要的研究价值.
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