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Lai L, Huang XL, Wang YC, Liu SL, Lin SM, Chen D, Han LL, Yu H, Shen XL. Detection and analysis of null alleles of amelogenin in gender identification. Leg Med (Tokyo) 2021; 52:101899. [PMID: 34052679 DOI: 10.1016/j.legalmed.2021.101899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 03/31/2021] [Accepted: 04/20/2021] [Indexed: 11/17/2022]
Abstract
In this study, we located eight samples with null alleles of amelogenin out of 10,750 cases, and discussed the influence in gender identification and forensic personal identification. Amelogenin was detected and retested by several autosomal STR kits and sex chromosomal STR kits, and the causes were analyzed by chromosome karyotype analysis and Y chromosome microdeletion detection if necessary. Suspected AMEL-X loss was observed in five samples, but no abnormality was detected in the X-STR loci. AMEL-X was recovered when samples were retested by other detection systems designed with different primers. One sample had AMEL-X and X-STR loci loss, and the karyotype was chimeric 45,X0[70]/46,X,+mar[13].Two male samples lost AMEL-Y fragment, and both of them lost DYS522-DYS570-DYS576 loci, but no abnormalities were found in the STS loci of SRY and AZF regions. Therefore, when carrying out gender identification by using amelogenin, it is essential to focus on null alleles of amelogenin. In especially, deal with the samples collected from the individuals who had chromosomal hereditary disorders(e.g. Turner Syndrome and Oligospermia / Azoospermia). In order to achieve this, laboratories should have various techniques to verify the null alleles of amelogenin and ensure accurate genotyping. Accurate genotyping of amelogenin and DNA database establishment are vital for personal identification.
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Affiliation(s)
- Li Lai
- Forensic Science Institute of Fujian Provincial Hospital, Fujian Provincial Key Laboratory of Cardiovascular Disease, Fuzhou, Fujian 350001, PR China; Provincial Clinicial College of Fujian Medical University, Fuzhou, Fujian 350001, PR China
| | - Xiao-Li Huang
- Provincial Clinicial College of Fujian Medical University, Fuzhou, Fujian 350001, PR China; Clinical Laboratory of Fujian Provincial Hospital, Fuzhou, Fujian 350001, PR China
| | - Yao-Cheng Wang
- Forensic Science Institute of Fujian Provincial Hospital, Fujian Provincial Key Laboratory of Cardiovascular Disease, Fuzhou, Fujian 350001, PR China; Provincial Clinicial College of Fujian Medical University, Fuzhou, Fujian 350001, PR China
| | - Shang-Long Liu
- Forensic Science Institute of Fujian Provincial Hospital, Fujian Provincial Key Laboratory of Cardiovascular Disease, Fuzhou, Fujian 350001, PR China; Provincial Clinicial College of Fujian Medical University, Fuzhou, Fujian 350001, PR China
| | - Sai-Mei Lin
- Forensic Science Institute of Fujian Provincial Hospital, Fujian Provincial Key Laboratory of Cardiovascular Disease, Fuzhou, Fujian 350001, PR China
| | - Dian Chen
- Forensic Science Institute of Fujian Provincial Hospital, Fujian Provincial Key Laboratory of Cardiovascular Disease, Fuzhou, Fujian 350001, PR China
| | - Li-Li Han
- Forensic Science Institute of Fujian Provincial Hospital, Fujian Provincial Key Laboratory of Cardiovascular Disease, Fuzhou, Fujian 350001, PR China
| | - Hong Yu
- Forensic Science Institute of Fujian Provincial Hospital, Fujian Provincial Key Laboratory of Cardiovascular Disease, Fuzhou, Fujian 350001, PR China
| | - Xiao-Li Shen
- Forensic Science Institute of Fujian Provincial Hospital, Fujian Provincial Key Laboratory of Cardiovascular Disease, Fuzhou, Fujian 350001, PR China; Provincial Clinicial College of Fujian Medical University, Fuzhou, Fujian 350001, PR China
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