Navigation Links
A potential sugar fix for tumors
Date:4/15/2008

DURHAM, N.C. -- Researchers at the Duke School of Medicine apparently have solved the riddle of why cancer cells like sugar so much, and it may be a mechanism that could lead to better cancer treatments.

Jonathan Coloff, a graduate student in Assistant Professor Jeffrey Rathmells laboratory in the Duke Department of Pharmacology and Cancer Biology, has found that the tumor cells use glucose sugar as a way to avoid programmed cell death. They make use of a protein called Akt, which promotes glucose metabolism, which in turn regulates a family of proteins critical for cell survival, the researchers shared during an April 15 presentation at the American Association of Cancer Research Annual Meeting in San Diego.

In normal cells, growth factors regulate metabolism and cell survival. Removing these factors leads to loss of glucose uptake and metabolism and cell death. Cancer cells, however, maintain glucose metabolism and resist cell death, even when deprived of growth factors.

To study how Akt might affect these processes, Coloff and colleagues introduced a cancer-causing form of Akt called myrAkt, into cells that depend on growth factor to survive. The mutant form of Akt allowed cells to maintain glucose usage and survive even when no growth factors were present, allowing them to bypass a normal safeguard used by cells to prevent cancer development.

The death of normal cells after growth factors are removed is partly accomplished by two proteins called Mcl-1 and Puma. But the cancer-causing version of Akt prevents these two proteins from accomplishing their tasks, allowing the cell to survive when it shouldnt.

Once glucose was withdrawn from the environment, however, Akt was no longer able to maintain regulation of the key targeted proteins Mcl-1 and Puma, and the cells died.

Akts dependence on glucose to provide an anti-cell-death signal could be a sign of metabolic addiction to glucose in cancer cells, and could give us a new avenue for a metabolic treatment of cancer, said Dr. Rathmell.


'/>"/>

Contact: Mary Jane Gore
mary.gore@duke.edu
919-660-1309
Duke University Medical Center
Source:Eurekalert

Related medicine news :

1. DNA vaccine against multiple sclerosis appears safe, potentially beneficial
2. UCLA study identifies designer estrogen as potential MS drug
3. Office-Based Medical Treatment and Internet Resources Are Potential Solution to Rising Painkiller Misuse Among Teens, Young Adults
4. Common abdominal pain may be due to a potentially treatable newly recognized inflammatory reaction
5. Potential new approach to treat cognitive impairments in schizophrenia
6. Nosespray vaccine using aloe vera has exciting potential, researcher says
7. Network approach identifies potential breast cancer susceptibility gene
8. Liver fibrosis will be treated by a potential target
9. Researchers study potential health benefits of natural chemicals in muscadine grape seeds
10. Jefferson researchers find stem cells in degenerating spinal discs, potential for repair
11. China Holdings, Inc. Announces 2nd Biomass Renewable Energy Project (Power Capacity: 50 MW); Total Potential: 100 MW in Biomass Energy Pipeline
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/29/2017)... Ca (PRWEB) , ... March 29, 2017 , ... ... process in many scientific laboratories. The assembly protocols involve many repetitive steps and ... suited for automation, which enables the high-throughput needed, and results in a lower ...
(Date:3/29/2017)... ... March 29, 2017 , ... Hamlin Dental Group, multi-location ... now offering laser dental treatments. Dental lasers are safe and effective options, and can ... options and can improve the overall quality of care. , Dr. Hamid Reza of ...
(Date:3/29/2017)... ... March 29, 2017 , ... Physicians’ Education Resource® (PER®), ... medical education conference for clinicians who manage some of the most difficult-to-treat forms ... , The program will be led by co- chairs Dr. John Marshall, chief ...
(Date:3/29/2017)... ... March 29, 2017 , ... AvePoint , the Microsoft Cloud expert, is ... Richmond, Virginia, located at the Riverfront Plaza, 901 East Byrd Street. AvePoint is celebrating ... Ralph S. Northam and Mayor of Richmond Levar M. Stoney. , Founded in 2001, ...
(Date:3/28/2017)... ... March 28, 2017 , ... ... in order to improve teacher quality, the field must first improve teacher preparation ... popular reform to the next” and that decades of input- and outcome-based research ...
Breaking Medicine News(10 mins):
(Date:3/28/2017)... March 28, 2017  Medeon Biodesign, Inc., a ... is pleased to announce that the Company led ... Panther Orthopedics, Inc., a San Jose, ... solutions for orthopedic extremity applications.  ... rapidly, primarily due to procedure volume growth, lifestyle ...
(Date:3/28/2017)...  "US Cancer Generics Market Outlook 2022" report ... trend analysis related to the emergence and integration ... in US. The report analyzes various clinical and ... generics drugs in recent years. The introduction of ... dollars for various stake holders involved US cancer ...
(Date:3/28/2017)... 2017  Orexigen Therapeutics, Inc. (Nasdaq: OREX ... fourth quarter and year ended December 31, 2016. ... progress for Orexigen, beginning with the re-acquisition of the ... March, the team at Orexigen demonstrated remarkable focus, executing ... and strengthened our Company while rewarding us full control ...
Breaking Medicine Technology: