中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (25): 4062-4067.doi: 10.3969/j.issn.2095-4344.2017.25.021

• 干细胞基础实验 basic experiments of stem cells • 上一篇    下一篇

中国深圳地区12个X染色体短串联重复序列基因座的遗传多态性:一项家系调查分析

李 桢1,李雪梅1,邹红岩1,程良红2   

  1. 1深圳市血液中心输血医学研究所,广东省深圳市  5180352广东南天司法鉴定所中心实验室,广东省深圳市  518045
  • 修回日期:2017-06-24 出版日期:2017-09-08 发布日期:2017-10-09
  • 通讯作者: 程良红,硕士,主任技师。广东南天司法鉴定所中心实验室,广东省深圳市 518045
  • 作者简介:李桢,女,1969年生,北京市人,汉族,1993年兰州医学院毕业,主任技师,主要从事法医物证和免疫遗传方面的研究。 并列第一作者:李雪梅,女,1974年生,吉林省人,汉族,1997年吉林医学院毕业,副主任技师。
  • 基金资助:

    深圳市科技计划项目(201302152)

Genetic polymorphism of 12 short tandem repeat on chromosome X loci in Shenzhen, China: a pedigree investigation

Li Zhen1, Li Xue-mei1, Zou Hong-yan1, Cheng Liang-hong2   

  1. 1Institute of Transfusion Medicine, Shenzhen Blood Center, Shenzhen 518035, Guangdong Province, China; 2Central Laboratory of Guangdong Nantian Judicial Appraisal Institute, Shenzhen 518045, Guangdong Province, China
  • Revised:2017-06-24 Online:2017-09-08 Published:2017-10-09
  • Contact: Cheng Liang-hong, Master, Chief technologist, Central Laboratory of Guangdong Nantian Judicial Appraisal Institute, Shenzhen 518045, Guangdong Province, China
  • About author:Li Zhen, Chief technologist, Institute of Transfusion Medicine, Shenzhen Blood Center, Shenzhen 518035, Guangdong Province, China Li Xue-mei, Associate chief technologist, Institute of Transfusion Medicine, Shenzhen Blood Center, Shenzhen 518035, Guangdong Province, China Li Zhen and Li Xue-mei contributed equally to this work.
  • Supported by:

    the Science and Technology Project of Shenzhen City, No. 201302152

摘要:

文章快速阅读:

 

文题释义:
遗传标记个体识别的系统效能:
即遗传标记识别没有血缘关系个体的能力,可用个体识别力定量评价。个体识别力指从群体中随机抽取2名无关个体,其遗传标记表型不相同的概率。对某一遗传标记而言,多态性程度越高,其识别无关个体的能力就越强。提高系统的个体识别能力可以通过增加检测的遗传标记数目来实现,从而获得累积个体识别力。
X染色体短串联重复序列:具有特殊的遗传规律,在亲属关系鉴定中可作为常染色体和Y染色体的有效补充。

 

摘要
背景:
X染色体短串联重复序列(short tandem repeat on chromosome X,X-STR)具有特殊的遗传规律,使其在法医物证鉴定中表现出常染色体遗传标记无法比拟的优点。 但其群体遗传学研究数据远比不上常染色体STR,尤其是单倍型遗传数据的报道在国内外均很少见。
目的:通过家系分析,研究深圳地区12个X染色体STR基因座的遗传多态性,为X-STR在法医学、遗传学的应用提供科学有效的数据。
方法:常规Chelex-100法提取118个家系的血样DNA,使用Investigator Argus X-12试剂盒进行PCR扩增。用直接计数法和Excel软件统计231个无关个体的等位基因频率,并用卡方检验对女性样本的12个X-STR基因座进行Hardy-Weinberg平衡检验,根据公式计算个体识别力和平均排除率。采用家系分析确定女性样本的单倍型,用直接计数法和Excel软件计算111位父亲和119位母亲的4个连锁群的单倍型频率。
结果与结论:①基因多态性分析:DXS10135基因座的多态性最高,检出了21个等位基因;DXS7423基因座多态性最差,仅有4个等位基因;男性累积个体识别力DPm为0.999 999 99;女性累积个体识别力DPf为0.999 999 99;累积三联体平均排除率MECtrio为0.999 999 99;累积二联体平均排除率MECduo为0.999 998 11;②单倍型分析:试验获得了349个单倍型。连锁群X1-X4中分别有238,139,153和157个不同的单倍型;③结果说明,X-12检测系统在中国深圳地区具有较高的遗传多态性,在法医学个体识别及亲权鉴定中具有重要的应用价值。

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程
ORCID:0000-0003-0567-0495(程良红)

关键词: 干细胞, 组织工程, X染色体, 短串联重复序列, 单倍型, 等位基因频率, 个体识别力, 平均排除率, 家系分析, 多态性, 连锁群, 法医学

Abstract:

BACKGROUND: The special genetic law of short tandem repeat on chromosome X (X-STR) makes it incomparable with autosome markers in forensic identification. However, the population genetics data is far less than that of the autosome STR, and especially the haplotype data are rarely reported.
OBJECTIVE: To study the genetic polymorphism of 12 X-STR loci in Shenzhen area by pedigree analysis, aiming to provide scientific and effective data for the application of X-STR in forensic medicine and genetics.
METHODS: The blood samples of 118 families were taken to extract DNA by Chelex-100, followed by PCR amplification using Investigator Argus X-12 kit. The frequency of alleles of 231 unrelated individuals was counted by direct counting method and Excel software. Hardy-Weinberg equilibrium test was performed on 12 X-STR loci of female samples by chi-square test. Discrimination power and mean exclusion chance were calculated according to the formula. Pedigree analysis was done to identify haplotypes of female samples and the haplotype frequencies of 4 linkage groups in 111 fathers and 119 mothers were calculated using direct counting method and Excel software.
RESULTS AND CONCLUSION: In this study, 349 haplotypes were obtained. There were 238, 139, 153 and 157 haplotypes in linkage groups X1-X4, respectively. The polymorphism of DXS10135 locus was the highest with 21 alleles, while the polymorphism of DXS7423 locus was the worst with only 4 alleles. The combined discrimination power was 0.99999999 in males and 0.99999999 in females. The combined mean exclusion chance was 0.99999999 in trio cases, and 0.99999811 in duo cases. These findings indicate that the X-12 detection system has high polymorphism in Shenzhen Han population, and has important application value in forensic individual identification and paternity testing.

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

Key words: Tissue Engineering, X Chromosome, Polymorphism, Single Nucleotide, Genetic Linkage, Gene Frequency, Haploidy

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