Taga gene and methods for detecting predisposition to peptic ulc

Details Taga gene and methods for detecting predisposition to peptic ulc Taga gene and methods for detecting predisposition to peptic ulc

1994-09-30

1998-03-31

Housel, James C.

Chemistry: molecular biology and microbiology

Measuring or testing process involving enzymes or...

Involving antigen-antibody binding, specific binding protein...

4353201, G01N 33554, G01N 33569

Patent

active

057337403

ABSTRACT:
An isolated nucleic acid encoding an approximately 120-128 kilodalton antigen of Helicobacter pylori, or an antigenic fragment thereof, wherein the antigen is associated with peptic ulceration. The present invention also provides methods of detecting the presence of a Helicobacter pylori strain possessing the 120-128 kilodalton antigen in a subject, comprising the steps of contacting an antibody-containing sample from the subject with a detectable amount of the tagA antigen or antigenic polypeptide of the present invention and detecting the binding of the antigen or fragment and the antibody. The detection of a strain expressing the TagA antigen is an indication of predisposition to peptic ulceration and gastric carcinoma. A mutant H. pylori not expressing a functional TagA antigen is also provided.

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