Anti-aging gene `may help suppress tumours`
Washington: In a new study, researchers have shed more light on how an anti-aging gene suppresses cancer growth.
According to the new joint study by the University of Michigan Health System and Harvard Medical School, loss of the SIRT6 protein in mice increases the number, size and aggressiveness of tumors.
The study also suggests that the loss of SIRT6 promotes tumor growth in human colon and pancreatic cancers.
“It is critical to understand the spectrum of genes that suppress tumor development,” co-senior author David Lombard from U-M Medical School said.
“Our research suggests SIRT6 may have a critical role in blocking cancer and controlling cellular metabolism. We hope to build on this work to better understand how this protein suppresses tumor development, and provide insight into potential future means of reprogramming cancer metabolism,” he said.
The research was done in conjunction with the Massachusetts General Hospital Cancer Center at Harvard Medical School. Raul Mostoslavsky, M.D., Ph.D., assistant professor of medicine at Harvard Medical School, was the co-senior author.
The new research highlights the role SIRT6 plays in dampening cancer growth by repressing aerobic glycolysis – a major feature of cancer cells that involves the conversion of glucose to lactate. SIRT6 also inhibits activity of the key cancer gene Myc.
Many studies in cancer biology have focused on the importance of tumor suppressor proteins and how they may protect cells from progressing to cancer.
The new research follows up on previous studies that have tied SIRT6 to longevity in male mice. Other research has also shown that the protein may protect against diet-induced obesity.
“This work points to the conservation of biological mechanisms between lower organisms and humans, and the importance of fundamental basic research,” Lombard said.
“This family of proteins was originally studied in yeast. It turns out to have key roles in promoting mammalian health,” he added.
The study has been published in the journal Cell.