Methods for the diagnosis of fetal abnormalities
First Claim
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1. A method for determining the presence or absence of a fetal trisomy or monosomy using a maternal blood sample comprising a mixture of fetal and maternal genomic nucleic acids, the method comprising:
- obtaining a test sample comprising a mixture of fetal and maternal genomic nucleic acids from a maternal blood sample;
selectively amplifying a plurality of target nucleic acids from the test sample and a plurality of target nucleic acids from a reference sample, wherein the target nucleic acids are selected from one or more chromosomes to be tested for trisomy or monosomy, and wherein the reference sample is diploid for the one or more chromosomes to be tested for trisomy or monosomy;
detecting the amplified target nucleic acids from the test sample and from the reference sample;
quantifying the target nucleic acids from the test sample and from the reference sample by highly parallel sequencing;
analyzing the test sample for the presence or absence of a fetal trisomy or monosomy by comparing the quantity of the detected amplified target nucleic acids obtained from the test sample for the one or more chromosomes tested for trisomy or monosomy to the quantity of the detected amplified target nucleic acids obtained from the reference sample for the one or more chromosomes tested for trisomy or monosomy; and
generating a report on the presence or absence of trisomy or monosomy in the maternal blood sample.
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Abstract
The present invention relates to methods for detecting, enriching, and analyzing rare cells that are present in the blood, e.g. fetal cells. The invention further features methods of analyzing rare cell(s) to determine the presence of an abnormality, disease or condition in a subject, e.g. a fetus by analyzing a cellular sample from the subject.
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12 Claims
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1. A method for determining the presence or absence of a fetal trisomy or monosomy using a maternal blood sample comprising a mixture of fetal and maternal genomic nucleic acids, the method comprising:
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obtaining a test sample comprising a mixture of fetal and maternal genomic nucleic acids from a maternal blood sample; selectively amplifying a plurality of target nucleic acids from the test sample and a plurality of target nucleic acids from a reference sample, wherein the target nucleic acids are selected from one or more chromosomes to be tested for trisomy or monosomy, and wherein the reference sample is diploid for the one or more chromosomes to be tested for trisomy or monosomy; detecting the amplified target nucleic acids from the test sample and from the reference sample; quantifying the target nucleic acids from the test sample and from the reference sample by highly parallel sequencing; analyzing the test sample for the presence or absence of a fetal trisomy or monosomy by comparing the quantity of the detected amplified target nucleic acids obtained from the test sample for the one or more chromosomes tested for trisomy or monosomy to the quantity of the detected amplified target nucleic acids obtained from the reference sample for the one or more chromosomes tested for trisomy or monosomy; and generating a report on the presence or absence of trisomy or monosomy in the maternal blood sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification