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    • 23. 发明申请
    • NONINVASIVE PRENATAL SCREENING USING DYNAMIC ITERATIVE DEPTH OPTIMIZATION
    • 动态迭代深度优化的无创性初步筛选
    • WO2018064486A1
    • 2018-04-05
    • PCT/US2017/054318
    • 2017-09-29
    • COUNSYL, INC.
    • MUZZEY, DaleARTIERI, Carlo, G.EVANS, Eric, AndrewHAQUE, Imran, Saeedul
    • A61K39/395A61P35/00C12P19/34C12Q1/68
    • Fetal maternal samples taken from pregnant women include both maternal cell-free DNA and fetal cell-tree DNA. Described herein are methods for determining a chromosomal abnormality of a test chromosome or a portion thereof in a fetus by analyzing a test maternal sample of a woman carrying said fetus, wherein the test maternal sample comprises fetal cell- free DNA and maternal cell-free DNA. The chromosomal abnormality can include aneuploidy or a microdeletion. In some embodiments, the chromosomal abnormality is determined by measuring a dosage of the test chromosome or portion thereof in the test maternal sample, measuring a fetal fraction of cell-free DNA in the test maternal sample, and determining an initial value of likelihood that the test chromosome or the portion thereof in the fetal cell-free DNA is abnormal based on the measured dosage, an expected dosage of the test chromosome or portion thereof, and the measured fetal fraction.
    • 从孕妇身上采集的胎儿母体样本包括母体无细胞DNA和胎儿细胞树DNA。 本文描述了通过分析携带所述胎儿的妇女的测试母体样本来确定胎儿中测试染色体或其部分的染色体异常的方法,其中所述测试母体样本包含胎儿无细胞DNA和无母系细胞DNA 。 染色体异常可能包括非整倍性或微缺失。 在一些实施方案中,染色体异常通过测量测试母体样本中测试染色体或其部分的剂量,测量测试母体样本中无细胞DNA的胎儿分数并确定测试母体样本中无细胞DNA的可能性的初始值 基于测量的剂量,测试染色体或其部分的预期剂量以及测量的胎儿分数,测试染色体或其在胎儿无细胞DNA中的部分是异常的。