Chemistry: molecular biology and microbiology – Measuring or testing process involving enzymes or... – Involving virus or bacteriophage
Patent
1995-01-17
1997-05-13
Myers, Carla J.
Chemistry: molecular biology and microbiology
Measuring or testing process involving enzymes or...
Involving virus or bacteriophage
435 6, 435 724, 435 725, 536 2431, 536 2432, 935 8, 935 77, 935 78, C12Q 168, C12Q 170, C07H 2104
Patent
active
056291477
ABSTRACT:
Fetal cells may be obtained from amniocentesis, chorionic villus sampling, percutaneous umbilical cord sampling or in vitro fertilization embryos or products of conception, but are preferably from maternal peripheral blood. Fetal cells may be enriched by density gradient centrifugation. Fetal cells may also be enriched by removing maternal cells with an antibody to a cell surface antigen, e.g. anti-CD45, either immobilized or by fluorescence-activated cell sorting. Fetal cells are also distinguishable from maternal cells by staining, e.g. with a labeled antibody to cytokeratin or to fetal hemoglobin, or for fetal hemoglobin by hematoxylin/eosin, or by in situ hybridization to detect one or more fetal mRNAs, e.g., of fetal hemoglobin or fetoprotein. Amplification may be used in conjunction with the in situ hybridization. Fetal cells circulating in maternal blood may be separated by flow cytometry, sorting on their intrinsic light scattering properties. Fetal nucleated erythrocytes may be identified by a label for fetal hemoglobin. Fetal cells may be treated to determine genetic characteristics or abnormalities, infectious agents or other properties by nucleic acid hybridization. Genetic abnormalities may include deletions, additions, amplifications, translocations or rearrangements. Multiple abnormalities may also be detected simultaneously, and they may be visually distinguished by color. Kits are provided for the disclosed procedures.
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Asgari Morteza
Blick Mark
Bresser Joel
Cubbage Michael L.
Prashad Nagindra
Aprogenex, Inc.
Myers Carla J.
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