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Polymorphism and haplotype analysis of three novel short tandem repeat loci in the p11.4 region of human X chromosome. Int J Legal Med 2021; 136:513-518. [PMID: 34741211 DOI: 10.1007/s00414-021-02739-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 10/26/2021] [Indexed: 10/19/2022]
Abstract
X-chromosomal short tandem repeats (X-STRs) are useful for the identification of absent single parents and complex blood relations. In the present study, we aimed to identify novel STR loci for use as DNA markers by conducting polymorphism and haplotype analyses. We detected three novel STR loci (LC552061, LC552062, and LC552063, with repetitive structures of (GGAA)n(GGGA)m, (CCTT)n(CCCT)m, and (ATTT)n, respectively) in the p11.4 region of the X chromosome. For these X-STRs, the polymorphism information content values ranged from 0.5766 to 0.6377 and the power of discrimination in males and females ranged from 0.6269 to 0.6844 and from 0.8105 to 0.8537, respectively. The linkage disequilibrium analysis revealed p values of < 0.0001, < 0.0001, and 0.00909 between LC552061 and LC552062, LC552061 and LC552063, and LC552062 and LC552063, respectively. Additional linkage disequilibrium analysis including seven previously analyzed loci (LC149476, LC149479, LC149480, LC149484, LC317283, LC317284, and LC317285) revealed a p value of < 0.001 among each of the five loci (LC149476, LC149479, LC149480, LC149484, and LC317283) and between LC317284 and LC317285, indicating that they were a linked group. These results indicate that, in addition to the seven previously detected loci, the three novel X-STR loci identified in the present study might be useful DNA markers for complex kinship analysis and might support the Investigator® Argus X-12 kit.
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Nishi T, Fukui K, Iwadate K. Genetic polymorphism analyses of three novel X chromosomal short tandem repeat loci in the Xp22.3 region. Leg Med (Tokyo) 2020; 45:101709. [PMID: 32371301 DOI: 10.1016/j.legalmed.2020.101709] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 03/13/2020] [Accepted: 04/17/2020] [Indexed: 11/18/2022]
Abstract
X chromosomal short tandem repeats (X-STRs) can be useful for haplotype analysis in DNA testing, particularly for complex kinship testing or when one parent is absent. We searched downstream of four previously detected loci in the Xp22.3 region (LC149476, LC149479, LC149480, and LC149484) and detected and analyzed three novel short tandem repeats (STRs), LC317283, LC317284, and LC317285, with the repeat sequences TATAA, TTTA, and TATC, respectively. The forensic statistical values in Japanese subjects were confirmed to be noninferior to existing loci, with values for polymorphism information content, the power of discrimination in males (PDm), and the power of discrimination in females (PDf) of 0.5606-0.7448, 0.6078-0.7774, and 0.7990-0.9178, respectively. Haplotype analysis also revealed linkage disequilibrium between LC317283 and the four known loci (LC149476, LC149479, LC149480, and LC149484) and between two other novel loci (LC317284 and LC317285). Analysis of three family samples suggested that these STRs could be useful in complex kinship testing, so we developed an X-STR multiplex polymerase chain reaction (PCR) system for the seven loci and confirmed its ability to provide favorable amplification. We anticipate that the identified loci and developed multiplex PCR system will be beneficial to the field of forensic medicine.
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Affiliation(s)
- Takeki Nishi
- Department of Forensic Medicine, The Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, 105-8461 Tokyo, Japan.
| | - Kenji Fukui
- Department of Forensic Medicine, The Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, 105-8461 Tokyo, Japan
| | - Kimiharu Iwadate
- Department of Forensic Medicine, The Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, 105-8461 Tokyo, Japan
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Chen M, Ren H, Liu Z, Zhao J, Chen C, Shi Y, Jia L, Cheng F, Chen T, Fan Q, Yang Y, Liu Y, Zhang G, Yan J. Genetic polymorphisms and mutation rates of 16 X-STRs in a Han Chinese population of Beijing and application examples in second-degree kinship cases. Int J Legal Med 2019; 134:163-168. [PMID: 30937593 DOI: 10.1007/s00414-019-02047-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 03/19/2019] [Indexed: 10/27/2022]
Abstract
As a supplementary tool in forensic cases, X chromosomal short tandem repeats (X-STRs) might bridge large pedigree gaps and bring inspiration to forensic practices for the special mode of inheritance. To standardize the application of X-STRs, the DNA Commission of the International Society for Forensic Genetics (ISFG) presented recommendations concentrating on biostatistical evaluations. Following this guideline, in this study, 1247 (655 females and 592 males) unrelated individuals and 770 families originating from a Han Chinese population of Beijing were investigated with 16 X-STRs. The combined PDF and PDM were 0.999999999999994 and 0.999999997, respectively. The combined MECKrüger, MECKishida, MECDesmarais, and MECDesmarais duo were 0.999972736708864, 0.999999975670766, 0.999999975720931, and 0.999993489709197, respectively. In addition, a population comparison demonstrated that genetic heterogeneity widely exists between the Han population of Beijing and other populations, especially southern Han Chinese, European, and West African populations. Additionally, the overall mutation rates of the paternal and maternal germlines of the 16 X-STRs were 0.0021 and 0.0003, respectively. Among them, HPRTB showed the highest paternal mutation rate of 0.0094. Finally, based on these forensic parameters, the likelihood ratios of four second-degree kinship cases were evaluated. Comparing with autosomal STR, X-STR showed significant advantages for hypothesis exclusion. Our study indicated that the 16 X-STR loci are highly polymorphic in the Han population of Beijing and could be a satisfactory complimentary tool for forensic applications.
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Affiliation(s)
- Man Chen
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, 100101, People's Republic of China.,University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - He Ren
- Beijing Police College, Beijing, 102202, People's Republic of China
| | - Zhiyong Liu
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, 100101, People's Republic of China.,University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Jing Zhao
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, 100101, People's Republic of China
| | - Chong Chen
- Beijing Tongda Shoucheng Institute of Forensic Science, Beijing, 100192, People's Republic of China
| | - Yan Shi
- Beijing Tongda Shoucheng Institute of Forensic Science, Beijing, 100192, People's Republic of China
| | - Li Jia
- Beijing Tongda Shoucheng Institute of Forensic Science, Beijing, 100192, People's Republic of China
| | - Feng Cheng
- School of Forensic Medicine, Shanxi Medical University, Taiyuan, 030009, People's Republic of China
| | - Tong Chen
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, 100101, People's Republic of China.,University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Qingwei Fan
- School of Forensic Medicine, Shanxi Medical University, Taiyuan, 030009, People's Republic of China
| | - Yaran Yang
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, 100101, People's Republic of China
| | - Yacheng Liu
- Beijing Tongda Shoucheng Institute of Forensic Science, Beijing, 100192, People's Republic of China
| | - Gengqian Zhang
- School of Forensic Medicine, Shanxi Medical University, Taiyuan, 030009, People's Republic of China.
| | - Jiangwei Yan
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, 100101, People's Republic of China. .,University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China. .,School of Forensic Medicine, Shanxi Medical University, Taiyuan, 030009, People's Republic of China.
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Fukuta M, Gaballah M, Takada K, Miyazaki H, Kato H, Aoki Y, Hamed SS, ElMorsi DAA, ElDakroory SA. Genetic polymorphism of 27 X-chromosomal short tandem repeats in an Egyptian population. Leg Med (Tokyo) 2019; 37:64-66. [PMID: 30711876 DOI: 10.1016/j.legalmed.2019.01.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 11/27/2018] [Accepted: 01/23/2019] [Indexed: 11/17/2022]
Abstract
We presented allele frequencies of 27 X-chromosomal short tandem repeats (DXS6807, DXS9902, DXS6795, DXS6810, DXS10076, DXS10077, DXS10078, DXS10162, DXS10163, DXS10164, DXS7132, DXS981, DXS6800, DXS6803, DXS6809, DXS6789, DXS6799, DXS7424, DXS101, DXS7133, GATA172D05, DXS10103, HPRTB, GATA31E08, DXS8377, DXS10147, and DXS7423) obtained from 352 unrelated individuals in Egypt. No deviation from Hardy-Weinberg equilibrium was detected. Two pairs of adjacent loci showed significant linkage disequilibrium. In the principal component analysis plot, the Egyptian data were located between Europe and sub-Saharan Africa, away from Asia.
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Affiliation(s)
- Mamiko Fukuta
- Department of Forensic Medicine, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan.
| | - Mohammed Gaballah
- Egyptian Forensic Medicine Authority, Ministry of Justice, Cairo, Egypt
| | - Kazushi Takada
- Department of Forensic Medicine, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Hiroki Miyazaki
- Department of Forensic Medicine, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Hideaki Kato
- Department of Forensic Medicine, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Yasuhiro Aoki
- Department of Forensic Medicine, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Sameera Sh Hamed
- Forensic Medicine and Clinical Toxicology Department, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Doaa A A ElMorsi
- Forensic Medicine and Clinical Toxicology Department, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Sahar A ElDakroory
- Forensic Medicine and Clinical Toxicology Department, Faculty of Medicine, Mansoura University, Mansoura, Egypt
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