Methods and reagents for identifying rare fetal cells in the...

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 15/12 (2006.01) C07H 17/00 (2006.01) C07K 1/00 (2006.01) C07K 14/435 (2006.01) C07K 16/18 (2006.01) C12Q 1/68 (2006.01) G01N 33/50 (2006.01) G01N 33/569 (2006.01) G01N 33/577 (2006.01) G01N 33/58 (2006.01) G01N 33/60 (2006.01) G01N 33/68 (2006.01)

Patent

CA 2428757

This invention provides methods and compositions useful for identifying and diagnosing rare fetal cells in a mixed cell population such as a maternal blood sample. The methods entail the use of specific nucleic acid probes that hybridize to fetal cell associated RNAs to identify the rate fetal cells or antibodies that bind to polypeptides encoded by the fetal cell associated RNAs for fetal cell detection. The cells detected by the methods of the present invention are useful for diagnosing the fetal cells for a genetic trait of interest, such as trisomy 21. Novel methods for simultaneous screening for fetal cells and diagnosing the fetal cells are also provide. Compositions comprising the fetal cell associated nucleic acids of the invention and their encoded proteins are also provided. The present invention further provides kits useful for practicing the present methods.

Cette invention concerne des méthodes et des compositions utiles pour l'identification et le diagnostic de cellules embryonnaires rares dans une population cellulaire mélangées telle qu'un échantillon de sang maternel. Ces méthodes font intervenir des sondes d'acides nucléiques spécifiques qui s'hybrident avec des ARN associés à des cellules embryonnaires et permettent d'identifier le taux de cellules embryonnaires ou d'anticorps qui se lient à des polypeptides codés par lesdits ARN pour la détection de telles cellules embryonnaires. Les cellules embryonnaires détectées par ce procédé sont utiles pour l'identification d'une caractéristique génétique d'intérêt telle que la trisomie 21. L'invention concerne également des méthodes permettant simultanément de cribler des cellules et de les soumettre à diagnostic. Sont également décrites des compositions renfermant les acides nucléiques associés à des cellules embryonnaires et les protéines pour lesquelles codent ces acides. L'invention porte en outre sur des trousses utiles pour la mise en oeuvre desdites méthodes.

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