Anti-MSH2, rabbit monoclonal - Optibodies

MSH2 (MutS Homologue 2) is one of the five key genes (besides MLH1, PMS1, PMS2, MSH6) of the Mis-Match Repair family (MMR). These genes encode MMR proteins, a group of nuclear enzymes that initiates repair of base-base mismatch, that can occur in DNA replication. MMR nuclear proteins form heterodimers, that bind abnormal DNA and initiates its removal. Loss of MMR proteins lead to accumulation of DNA replication errors in the proliferating cells. The above mentioned MMR genes have clinical interest, as they may mutate in families with hereditary non-polyposis colorectal cancer (HNPCC). About 3-5% of all colorectal carcinomas are related to MMR protein mutation. Carriers of an MLH1 or MSH2 mutation have a more than 70% lifetime risk of developing a colorectal carcinoma, with increased risk of developing endometrial carcinomas (50%). Staining for MLH1, MSH2 and MSH6 in colorectal carcinomas should be carried out in patients < 55 years-of-age or with a family history of these tumors.