BioMosaics’ Glypican-3 Antibody (clone 1G12) Validated at PhenoPath Laboratories for Immunohistochemical Detection of Liver Cancer
“We are pleased that PhenoPath has added the 1G12 Glypican-3 antibody to its test menu. Immunohistochemistry using this antibody provides added specificity to the identification of HCC in patient tissue samples,” said Dr.
The antibody validation studies were performed with formalin fixed paraffin embedded tissue sections used in routine immunohistochemistry tests. For validation, a series of tissues (normal & tumor) that would be part of the differential diagnosis in a clinical setting were tested to determine what percent might be positive. With the 1G12 antibody to GPC3, 88% (38/43) of cases with hepatocellular carcinoma showed strong positive immunostaining. In all observed cases, non-neoplastic liver that was present in the specimen was negative or showed rare cells positive for Glypican-3. All 21 cases of nodules in cirrhotic liver were negative for Glypican-3.
Primary Liver Cancer, or Hepatocellular Carcinoma, is one of the most common and aggressive malignant tumors worldwide, causing an estimated one million deaths annually. The main causative agents are hepatitis B virus (HBV), hepatitis C virus (HCV), as well as alcoholic cirrhosis and non-alcoholic steatohepatitis (NASH) which is associated with obesity and diabetes. The incidence of HCC has been steadily increasing over the past ten years and is expected to continue to rise over the next decade.
Glypican-3, an oncofetal antigen, is a member of the glypican family of GPI-anchored cell-surface heparan sulfate proteoglycans. Many studies have shown that, using the 1G12 antibody, GPC3 is detected at the protein level by immunohistochemistry in most cases of primary liver cancer, including small tumors. It is undetectable in normal liver and benign hepatic lesions. Glypican-3 has been identified as one of the earliest proteins detected in HCC. Recent validation studies using BioMosaics GPC3 1G12 monoclonal antibody have confirmed the early presence of GPC3 on HCC biopsies and in a percentage of highly dysplastic cirrhotic nodules. This class of dysplastic nodule is considered to be an early form of HCC, and immunohistochemical studies show that they are routinely negative for alpha fetoprotein. Glypican-3 therefore has considerable promise as a biomarker for early detection of HCC.
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About PhenoPath Laboratories
PhenoPath Laboratories is a physician-owned pathology reference laboratory providing diagnostic and contract research services to hospitals, physician offices, surgery centers, biopharmaceutical companies and research institutions nationwide. http://www.phenopath.com
Contacts: BioMosaics Inc. Mark Allegretta PhD; email@example.com
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SOURCE BioMosaics Inc.