Evidence of Negligible Parenting Influences on Self‐Control,Delinquent Peers,and Delinquency in a Sample of Twins

Behavioral genetic findings continue to call into question the dominant role of parental influence. Utilizing a sample of twins from the National Longitudinal Study of Adolescent Health (Add Health), we assess the association between parenting behaviors and child self‐control, delinquent peer formation, and delinquency. Our results indicate that genetic influences and non‐shared environmental influences account for variation in these outcomes. We discuss these findings as they relate to theorizing about the role and function of parenting in the etiology of unique traits and behaviors.     

Massive parallel sequencing and osteogenesis imperfecta: An essential tool for forensic investigation over child abuse

Osteogenesis imperfecta (OI) is a rare disease of collagen synthesis causing bone fragility. Also called “glass bone disease” since it manifests as spontaneous fractures, it is classified into nine types, both with dominant and recessive transmission. In 95% of cases OI is caused by mutations in COL1A1 and COL1A2 genes encoding the alpha1 and alpha2 chains of type 1 collagen, mainly null variants caused by frame-shift/nonsense mutations or splicing defects. In infants the differential diagnosis include not-accidental trauma, so child abuse. Families suspected of abuse often provide an unverified history of frequent fractures; conversely, the family history of individuals with OI often does not reveal any other affected individuals because of a de novo pathogenic variant in the proband or the presence of a mild phenotype in relatives. Therefore, legal medicine unit with DNA lab is crucial in these cases since it could early collect living or autopsy samples when a child abuse is suspected and then test DNA. We set up a MPS (massively parallel sequencing) panel including the coding regions of COL1A1 and COL1A2 and other 11 genes known to cause OI. We presented a case of suspected abuses in 2-month-old baby. MPS libraries were sequenced by Ion Torrent PGM platform; pathogenic variants and VUS (variants of uncertain significance) were confirmed by Sanger sequencing and familial segregation study was performed to better characterize the clinical significance of the mutation. This study remarks that MPS could help not only for identification, ancestry/phenotyping or molecular autopsy applications but also for forensic investigation over child abuse. The usefulness of this assay for diagnostic projects on victims of abuse together with post-mortem cases is discussed.     

DNATyper^TM15与Identifiler^TM试剂盒遗传学调查应用比较

目的比较DNATyper^TM 15和Identifiler^TM试剂盒的遗传学调查应用结果，以评价DNATyper^TM15试剂盒的指标和性能。方法用DNATyper^TM 15和Identifiler^TM试剂盒同时对290份北方汉族群体的血样本进行扩增检测，比较遗传学统计数据。结果DNATyper^TM15和Identifiler^TM荧光检测试剂盒中各基因座在汉族群体中的基因型分布均符合Hardy—Weinberg平衡，累积个人识别率和累计非父排除率：DNATyper^TM15试剂盒分别为2．66×10^-18和0．9999997；Identifiler^TM试剂盒分别为1．28×10^-17和0．9999984。且两个试剂盒对相同基因座的频率调查数据一致。结论DNATyper^TM15具有较高的个体识别和亲权鉴定能力，对法医学检案和DNA数据库建设具有应用价值。