METHODS FOR NON-INVASIVE PRENATAL PLOIDY CALLING

    公开(公告)号:US20190256908A1

    公开(公告)日:2019-08-22

    申请号:US16399991

    申请日:2019-04-30

    申请人: Natera, Inc.

    摘要: The present disclosure provides methods for determining the ploidy status of a chromosome in a gestating fetus from genotypic data measured from a mixed sample of DNA comprising DNA from both the mother of the fetus and from the fetus, and optionally from genotypic data from the mother and father. The ploidy state is determined by using a joint distribution model to create a plurality of expected allele distributions for different possible fetal ploidy states given the parental genotypic data, and comparing the expected allelic distributions to the pattern of measured allelic distributions measured in the mixed sample, and choosing the ploidy state whose expected allelic distribution pattern most closely matches the observed allelic distribution pattern. The mixed sample of DNA may be preferentially enriched at a plurality of polymorphic loci in a way that minimizes the allelic bias, for example using massively multiplexed targeted PCR.

    METHODS FOR NON-INVASIVE PRENATAL PLOIDY CALLING
    4.
    发明申请
    METHODS FOR NON-INVASIVE PRENATAL PLOIDY CALLING 审中-公开
    非侵入式预防性呼吸方法

    公开(公告)号:US20150072872A1

    公开(公告)日:2015-03-12

    申请号:US14546321

    申请日:2014-11-18

    申请人: Natera, Inc.

    IPC分类号: C12Q1/68 G06F19/00 G06F19/18

    摘要: The present disclosure provides methods for determining the ploidy status of a chromosome in a gestating fetus from genotypic data measured from a sample of DNA from the mother of the fetus and from the fetus, and from genotypic data from the mother and optionally also from the father. The ploidy state is determined by using a joint distribution model to create a set of expected allele distributions for different possible fetal ploidy states given the parental genotypic data, and comparing the expected allelic distributions to the pattern of measured allelic distributions measured in the mixed sample, and choosing the ploidy state whose expected allelic distribution pattern most closely matches the observed allelic distribution pattern. In an embodiment, the mixed sample of DNA may be preferentially enriched at a plurality of polymorphic loci in a way that minimizes the allelic bias.

    摘要翻译: 本公开提供了用于从胎儿母体和胎儿的DNA样品测量的基因型数据以及来自母亲的基因型数据以及任选地还可以从父亲的基因型数据确定胎儿胎儿中染色体的倍性状态的方法 。 通过使用联合分布模型来确定给定父母基因型数据的不同可能胎儿倍性状态的一组预期等位基因分布,并将预期等位基因分布与在混合样品中测量的测量等位基因分布的模式进行比较来确定倍性状态, 并选择其预期等位基因分布模式与观察到的等位基因分布模式最接近的倍性状态。 在一个实施方案中,DNA的混合样品可以以使等位基因偏倚最小化的方式优先富集在多个多态位点。

    METHODS FOR PREIMPLANTATION GENETIC DIAGNOSIS BY SEQUENCING
    5.
    发明申请
    METHODS FOR PREIMPLANTATION GENETIC DIAGNOSIS BY SEQUENCING 审中-公开
    通过序列预测遗传学诊断的方法

    公开(公告)号:US20140206552A1

    公开(公告)日:2014-07-24

    申请号:US14225356

    申请日:2014-03-25

    申请人: Natera, Inc.

    IPC分类号: C12Q1/68

    摘要: The present disclosure provides methods for determining the ploidy status of an embryo at a chromosome from a sample of DNA from an embryo. The ploidy state is determined by sequencing the DNA from one or more cells biopsied from the embryo, and analyzing the relative amounts of each allele at a plurality of polymorphic loci on the chromosome. In an embodiment, the ploidy state is determined by comparing the observed allele ratios to the expected allele ratios for different ploidy states. In an embodiment, the DNA is selectively amplified at a plurality of polymorphic loci by targeted sequencing. In an embodiment, the mixed sample of DNA may be preferentially enriched at a plurality of polymorphic loci in a way that minimizes the allelic bias.

    摘要翻译: 本公开提供了用于从胚胎的DNA样品测定染色体上胚胎的倍性状态的方法。 倍性状态通过对来自胚胎活检的一个或多个细胞的DNA进行测序,并分析染色体上多个多态性位点处的每个等位基因的相对量来确定。 在一个实施方案中,通过将观察到的等位基因比率与不同倍性状态的预期等位基因比率进行比较来确定倍性状态。 在一个实施方案中,通过靶向测序在多个多态位点选择性扩增DNA。 在一个实施方案中,DNA的混合样品可以以使等位基因偏倚最小化的方式优先富集在多个多态位点。

    Methods for non-invasive prenatal ploidy calling
    9.
    发明授权
    Methods for non-invasive prenatal ploidy calling 有权
    非侵入性产前倍性调用方法

    公开(公告)号:US09163282B2

    公开(公告)日:2015-10-20

    申请号:US13791397

    申请日:2013-03-08

    申请人: Natera, Inc.

    摘要: The present disclosure provides methods for determining the ploidy status of a chromosome in a gestating fetus from genotypic data measured from a mixed sample of DNA comprising DNA from both the mother of the fetus and from the fetus, and optionally from genotypic data from the mother and father. The ploidy state is determined by using a joint distribution model to create a plurality of expected allele distributions for different possible fetal ploidy states given the parental genotypic data, and comparing the expected allelic distributions to the pattern of measured allelic distributions measured in the mixed sample, and choosing the ploidy state whose expected allelic distribution pattern most closely matches the observed allelic distribution pattern. The mixed sample of DNA may be preferentially enriched at a plurality of polymorphic loci in a way that minimizes the allelic bias, for example using massively multiplexed targeted PCR.

    摘要翻译: 本公开提供了从包括来自胎儿母体和胎儿的DNA的DNA的混合样品测量的基因型数据以及任选地来自母体的基因型数据以及任选地从胎儿的基因型数据确定胎儿胎儿的染色体的倍性状态的方法 父亲。 通过使用联合分布模型来确定给定父母基因型数据的不同可能胎儿倍性状态的多个预期等位基因分布,并将预期等位基因分布与混合样品中测量的等位基因分布的模式进行比较来确定倍性状态, 并选择其预期等位基因分布模式与观察到的等位基因分布模式最接近的倍性状态。 DNA的混合样品可以以使等位基因偏倚最小化的方式优先富集在多个多态性位点,例如使用大规模复用的靶向PCR。

    Informatics Enhanced Analysis of Fetal Samples Subject to Maternal Contamination
    10.
    发明申请
    Informatics Enhanced Analysis of Fetal Samples Subject to Maternal Contamination 审中-公开
    母亲污染胎儿样本的信息学增强分析

    公开(公告)号:US20130196862A1

    公开(公告)日:2013-08-01

    申请号:US13780022

    申请日:2013-02-28

    申请人: Natera, Inc.

    IPC分类号: C12Q1/68

    摘要: The invention provides methods for chromosome copy number calling on genetic samples, such as fetal samples subject to contamination from maternal DNA. The present disclosure provides methods for determining the ploidy status of a chromosome in a fetus (such as a gestating fetus or a POC sample) from genotypic data measured from a mixed sample of DNA comprising DNA from both the mother of the fetus and from the fetus, and optionally from genotypic data from the mother and father. In some embodiments, the ploidy state is determined by using a joint distribution model to create a plurality of expected allele distributions for different possible fetal ploidy states given the parental genotypic data, and comparing the expected allelic distributions to the pattern of measured allelic distributions measured in the mixed sample, and choosing the ploidy state whose expected allelic distribution pattern most closely matches the observed allelic distribution pattern. The mixed sample of DNA may be preferentially enriched at a plurality of polymorphic loci in a way that minimizes the allelic bias, for example using massively multiplexed targeted PCR.

    摘要翻译: 本发明提供了染色体拷贝数调用基因样品的方法,例如受母体DNA污染的胎儿样品。 本公开提供了从包含来自胎儿母体和胎儿的DNA的DNA的混合样品测量的基因型数据中确定胎儿(例如胎儿胎儿或POC样品)中染色体的倍性状态的方法 ,以及来自母亲和父亲的基因型数据。 在一些实施方案中,通过使用联合分布模型来确定给定父母基因型数据的不同可能的胎儿倍性状态的多个预期等位基因分布,并将预期的等位基因分布与所测量的等位基因分布的模式进行比较来确定倍性状态 混合样品,并选择其预期等位基因分布模式与观察到的等位基因分布模式最为匹配的倍性状态。 DNA的混合样品可以以使等位基因偏倚最小化的方式优先富集在多个多态性位点,例如使用大规模复用的靶向PCR。