Scientists uncover new therapeutic target for cancer

December 25th, 2008 - 2:37 pm ICT by ANI  

Washington, Dec 25 (ANI): Researchers from University of Utah have identified a potential target that may hold key to new therapies for cancer.

The research team has identified two enzymes that, when combined, could be involved in the earliest stages of cancer.

Manipulating these enzymes genetically might lead to targeted therapies aimed at slowing or preventing the onset of tumours.

“We could conceivably reactivate a completely normal gene in a tumour cell a gene that could prevent the growth of a tumour if reactivated,” said David Jones, Ph.D., professor of oncological sciences at the University of Utah and senior director of early translational research at the university’’s Huntsman Cancer Institute (HCI).

“We believe this could be one of the earliest processes to go wrong in cancer. By manipulating these enzymes, we could possibly prevent or slow the onset of tumours,” he added.

The enzymes are believed to control an “onand-off switch” for critical genes that could trigger cancer or numerous other diseases and birth defects.

During the study on zebrafish, the scientists identified a previously unknown enzyme process that controls the levels of DNA methylation on genes.

“Methylation is a cellular process that is required for healthy cell growth and development, but it can go awry in cancer and diseased cells,” said Brad Cairns, Ph.D., HCI investigator and professor of oncological sciences at the University of Utah.

“You can think of DNA methylation as an on-and-off switch. Methylation silences or ‘’shuts off” genes that need to be turned off or are not functioning as they should, whereas the reverse process called demethylation ”turns on” healthy genes and genes needed at critical times in development,” he added.

In cancer, this methylation process goes haywire, leading to tumour growth. Genes that should be “turned on” are not and vice versa.

Defects in DNA methylation balance are strongly associated with the early development of cancer, other diseases and birth defects, and the scientists say that this enzyme system plays a critical role in maintaining this balance. They also believe it’’s a process that can be reversed.

The research is published in journal Cell. (ANI)

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