The Role Of Differentially Methylated Genes In The Initiation And Progression Of Colorectal Cancers
Funder
National Health and Medical Research Council
Funding Amount
$361,527.00
Summary
Most colorectal cancers develop from polyps in the lining of the bowel. The bulk of cancers develop from adenomatous polyps, but we have found that a second type of polyp called a hyperplatic polyp can also be associated with the development of cancer. During our studies of these polyps we found that a particular gene was inactivated in all of these polyps. We have called this gene HPP1. HPP1 was also found to be inactivated in adenomatous polyps and about 50% of colorectal cancers, indicating t ....Most colorectal cancers develop from polyps in the lining of the bowel. The bulk of cancers develop from adenomatous polyps, but we have found that a second type of polyp called a hyperplatic polyp can also be associated with the development of cancer. During our studies of these polyps we found that a particular gene was inactivated in all of these polyps. We have called this gene HPP1. HPP1 was also found to be inactivated in adenomatous polyps and about 50% of colorectal cancers, indicating that it may be an important player in the early stages of colorectal cancer and hence may allow opportunity for prevetive intervention. This grant proposal will investigate the function of HPP1 in the genesis of colorectal polyps and cancers.Read moreRead less
Characterisation Of Precursor Lesions In Colorectal Cancers With DNA Instability
Funder
National Health and Medical Research Council
Funding Amount
$60,190.00
Summary
It is now generally accepted that most colorectal cancers arise from previously benign lesions in the mucosal lining of the large bowel. These lesions are called adenomatous polyps. They have been extensively studied as have the cancers which evolve from them with regard to the type of cancer causing genetic changes they bear. Recently, it has been found that colorectal cancer is not a single disease in that there exists a subgroup comprising 15% of colorectal cancers which is an entirely differ ....It is now generally accepted that most colorectal cancers arise from previously benign lesions in the mucosal lining of the large bowel. These lesions are called adenomatous polyps. They have been extensively studied as have the cancers which evolve from them with regard to the type of cancer causing genetic changes they bear. Recently, it has been found that colorectal cancer is not a single disease in that there exists a subgroup comprising 15% of colorectal cancers which is an entirely different type wwith respect to genetic changes and biological behaviour. This subgroup contains cancers with a high level of microsatellite instability (MSI-high) and the cancers which comprise this group show none of the common genetic changes which can be demonstrated in both adenomatous polyps and the 85% of colon cancers which develop from them. The MSI-high colorectal cancers do however share some striking similarities to a type of polyp (hyperplastic) which has until quite recently been considered of little consequence. Our research group and others have shown an association with colorectal cancer in those patients in whom hyperplastic polyps are unusually large or numerous, especially if present in the right side of the large bowel, where the bulk of MSI-high colorectal cancers arise. The current proposal will investigate the hyperplastic polyp as a precursor lesion in the genesis of MSI-high cancers.Read moreRead less
Studies Of Genetic Predisposition To Develop Serrated Neoplasia In The Colorectum.
Funder
National Health and Medical Research Council
Funding Amount
$308,291.00
Summary
Colorectal Cancer was once believed to develop only from a certain kind of polyp in the colon called the adenoma. However, recently another type of polyp called the hyperplastic polyp was found to also be capable of producing a cancer. In this proposal, we will look at the possibility that the predisposition to form hyperplastic polyps may be inherited in families.