Detection of cancer and abnormal pregnancy using monoclonal...

C - Chemistry – Metallurgy – 07 – K

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C07K 16/26 (2006.01) G01N 33/574 (2006.01) G01N 33/76 (2006.01)

Patent

CA 2369923

Human chorionic gonadotropin (hCG) exists in blood and urine as a variety of isoforms, one of which contains peptide bond cleavages within its beta subunit and is referred to as nicked hCG (hCGn). This hCGn isoform appears more prevalent in the urine of patients with certain malignancies and possibly in other diseases of pregnancy. The present invention is directed to two monoclonal antibodies to an isoform of hCGn isolated from a choriocarcinoma patient. Two-site immunometric assays have been developed using these antibodies, designated B151 and B152. The former exhibits good specificity for hCGn independent of the source of the hCGn, that form excreted by choriocarcinoma patients, or the form of hCGn from normal pregnancies. The latter antibody, B152, is uniquely sensitive to the carbohydrate moieties of choriocarcinoma hCG, nicked or non-nicked, since its recognition of ligand is dependent upon carbohydrate differences rather than differences in peptide bond. These two immunometric assays provide novel diagnostic tools based on direct measurement of these hCG isoforms.

La gonadotrophine chorionique humaine (hCG) existe dans le sang et l'urine en tant que variété d'isoformes. L'une d'elles, qui contient des clivages de liaisons peptidiques à l'intérieur de sa sous unité bêta, est désignée hCG coupée (hCGn). Cette isoforme de la hCGn est plus courante dans l'urine des patients présentant certaines malignités et éventuellement dans d'autres maladies de grossesse. L'invention porte sur deux anticorps monoclonaux à une isoforme de la hCGn isolée chez un patient choriocarcinome. Deux analyses immunométriques sur site ont été élaborées à l'aide de ces anticorps, désignés B151 et B152. Le premier présente une bonne spécificité pour hCGn indépendante de la source de la hCGn, forme évacuée par des patients choriocarcinomes, ou la forme de la hCGn provenant de grossesses normales. L'autre anticorps, B152, est exceptionnellement sensible aux fractions glucidiques de hCG choriocarcinome, coupée ou non, étant donné que sa reconnaissance de ligand est fonction des différences glucidiques plutôt que des différences de liaisons peptidiques. Ces deux analyses immunométriques apportent de nouveaux outils de diagnostic fondés sur le mesurage direct de ces isoformes de la hCG.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Detection of cancer and abnormal pregnancy using monoclonal... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Detection of cancer and abnormal pregnancy using monoclonal..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detection of cancer and abnormal pregnancy using monoclonal... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1983944

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.