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Anti-tolA antibody in non-A, non-B chronic liver disease

Fukuoka Igaku Zasshi 83(10): 367-376

Anti-tolA antibody in non-A, non-B chronic liver disease

We constructed a cDNA library against the plasma obtained from the patient with acute exacerbation of non-A, non-B liver cirrhosis, and immunoscreened this library with the sera obtained from the patients with non-A, non-B chronic liver disease. One positive clones lambda-22C containing about 1.2 kb cDnA insert was isolated from 10-6 clones. Nucleotide sequence determination and subsequent homology search revealed its identity to the tolA gene of Escherichia coli. Anti-tolA antibody was detected in 54.5% of the patients with NANB chronic liver disease whose sera was negative for antibody to hepatitis C virus (anti-C100). In contrast, anti-tolA was detected only of 14.6% patients with anti-C100 positive NANB chronic liver disease, 10.5% with hepatitis B surface antigen-positive chronic liver disease, 7.7% with alcoholic liver disease and 4.2% in normal control, and non positive case in acute hepatitis of etiology and in primary biliary cirrhosis. However, antibody to the core protein of hepatitis C virus (anti-JCC) was detected 50% of the patients whose sera were negative for anti-C100 but positive for anti-tolA. Recently, it has been reported that hepatitis C virus is rich in mutations and has some variants. These results indicated the presence of a common epitope between the tolA protein and some agent related to non-A, non-B hepatitis, especially to anti-C100 negative non-A, non-B hepatitis such as variants of hepatitis C virus which have mutations in C100 coded region.

Accession: 009770189

PMID: 1281459

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