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Hereditas(Beijing) ›› 2023, Vol. 45 ›› Issue (1): 52-66.doi: 10.16288/j.yczz.22-293

• Research Article • Previous Articles     Next Articles

Application of transcriptome in time analysis and donor characterization in blood samples

Jin Zhang1,2(), Kaihui Liu2, Ying Zhang2, Jinping Hao2, Guangfeng Zhang2, Xiaoyu Xu2, Jingjing Chang2, Xingpeng Liu3, Xueying Yang2(), Jian Ye1,2()   

  1. 1. People's Public Security University of China, Beijing 100038, China
    2. Institute of Forensic Science Ministry of Public Security, Beijing 100038, China
    3. Ruijin Public Security Bureau, Ruijin 342500, China
  • Received:2022-10-31 Revised:2022-11-29 Online:2023-01-20 Published:2022-12-09
  • Contact: Yang Xueying,Ye Jian E-mail:zhangjin1101@126.com;yxystyhhp@163.com;yejian77@126.com
  • Supported by:
    the Science and Technology Development Programs of Ministry of Public Security P.R.C(2017JSYJC22);the Public Security Scientific and Technological Achievements Promotion and Guidance Programs of Ministry of Public Security P.R.C(2020TGYDBGAES25);the Basic research Funds for Public Welfare Research Institutes of the Central Government(2020JB008)

Abstract:

As an effective supplement to the current forensic DNA typing and one of the research hotpots in forensic science, the in-depth mining and characterization of biological evidence can provide rich and reliable clues for case investigation. In this study, the time-dependent variations of transcriptome were confirmed in in vitro blood samples within 0-168 days and a random forest model was established to realize the classification of blood samples with different TSD (time since deposition). Meanwhile, significant differences were observed in the transcripts of blood samples with different smoking habits and genders within a certain time period. HLA-DRB1, HLA-DQB1 and HLA-DQA2 were identified as markers for smoking habit identification, while the transcripts for RPS4Y1 and EIF1AY from the non-recombining region of the Y chromosome (NRY) were identified as markers for male sex identification. Thus, this study provides a theoretical foundation and experimental strategy for establishing a transcriptome-based method for characterizing blood sample retention time and donor characteristics in the field of forensic investigation.

Key words: forensic science, blood, time since deposition, smoking habit, gender