Navigation Links
Research aims to starve breast cancer cells
Date:8/29/2011

AUGUSTA, Ga. The most common breast cancer uses the most efficient, powerful food delivery system known in human cells and blocking that system kills it, researchers report.

This method of starving cancer cells could provide new options for patients, particularly those resistant to standard therapies such as tamoxifen, Georgia Health Sciences University researchers said.

Human estrogen receptor-positive breast cancer cells thriving in a Petri dish or transplanted onto mice die when exposed to a drug that blocks the transporter, called SLC6A14, said Dr. Vadivel Ganapathy, Chairman of GHSU's Department of Biochemistry and Molecular Biology.

"It basically starves the cancer cell," said Ganapathy, corresponding author of the study published in the Journal of Biological Chemistry. The transporter can carry 18 of the known 20 amino acids, fuel all cells need in some combination. Amino acids enable cells to make proteins, which they need to function and survive. The cell type determines its amino acid needs and delivery system. Rapidly growing, dividing estrogen receptor-positive breast cancer needs nearly every amino acid so it makes the smart choice of utilizing the transporter that can deliver the biggest load, Ganapathy said.

SLC6A14 is the only transporter known to carry all 10 essential amino acids, essential because the body can't make them so they have to be delivered via the bloodstream from food. The transporter also takes eight of the nonessential amino acids along for the ride, Ganapathy said.

And it is a fast ride. The transporter has three energy sources instead of the usual one or two, he said.

Interestingly, SLC6A14 is expressed at low levels in most of the body. "There are specialized features of this transport system which could be used by every cell to its advantage but they do not seem to do that. It's expressed only at low levels in normal tissues," Ganapathy noted. While that may seem like a loss for healthy cells, it bolsters the cancer-fighting potential for drugs that block SLC6A14 by making it a more specific cancer target. "Since the normal cells do not depend on this transporter, you can use a drug that selectively blocks it to target cancer cells" Ganapathy said.

The compound they used is alpha-methyl-DL-tryptophan, already used in humans for short periods when they are getting a PET scan in certain areas of the brain. When the researchers treated estrogen receptor-positive breast cancer cells with it or put it in the drinking water of the mice with the cells, rapid growth stopped and the cancer cells died. Further studies showed alpha-methyl-DL-tryptophan seemed to impact only cells expressing the SLC6A14 transport system. Even another type of breast cancer, estrogen receptor-negative, wasn't impacted.


'/>"/>

Contact: Toni Baker
tbaker@georgiahealth.edu
706-721-4421
Georgia Health Sciences University
Source:Eurekalert  

Related medicine news :

1. Embedded Mobile & M2M Device revenues to Rise to Almost $19 Billion Globally by 2014, Says Juniper Research
2. 2010 HSR Impact Award recognizes surgical safety research
3. MSU launches first anti-counterfeiting research program
4. Researchers map all the fragile sites of the yeast Saccharomyces cerevisiaes genome
5. UH Case Medical Center researchers publish promising findings for advanced cervical cancer
6. Researchers discover new way to kill pediatric brain tumors
7. Family Research Council: Planned Parenthood Report Oversexualizes Ten-Year-Olds, Undermines Parental Authority
8. Michael J. Fox Foundation Awards $1 Million to Drive Critical New Research Tools and Technologies in Parkinsons Drug Development
9. Luth Researchs IndicatorEDG(TM) Study Finds Americans Hopes of Achieving Their Dreams Are Fading
10. International Diabetes Federation awards $2 million to 9 global diabetes research projects
11. Gladstones Robert Mahley to receive Research!America advocacy award
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Research aims to starve breast cancer cells
(Date:2/10/2016)... ... February 10, 2016 , ... Pediatric ... in their patients. Research shows that the Goal Attainment Scale (GAS) captures 20% ... this challenge and learn more about the Goal Attainment Scale, Education Resources Inc. ...
(Date:2/10/2016)... ... 2016 , ... A national ergonomics pioneer , HealthPostures, ... March 9-11, 2016. Hosted by Ohio's Bureau of Worker's Compensation, the expo will ... running and largest worker's compensation event in Ohio, organizers of the safety congress ...
(Date:2/10/2016)... ... February 10, 2016 , ... Everseat has ... readily available to physicians. The integration will enable Allscripts users to post ... via Everseat’s free mobile app. , The partnership gives Everseat substantial added power ...
(Date:2/10/2016)... ... February 10, 2016 , ... ... UNF Drive, Jacksonville, FL 32224, February 26th: Amateur & Professional Divisions - ... - Time: 7:00pm – 10:00pm | Ticket Prices $30, Social Media: ...
(Date:2/10/2016)... CA (PRWEB) , ... February 10, 2016 , ... Workrite ... based company that has evolved from humble beginnings to being an internationally recognized leader ... company that we are today”, said Charlie Lawrence, President of Workrite. “Workrite recognized ...
Breaking Medicine News(10 mins):
(Date:2/10/2016)... Feb. 10, 2016 CSI Specialty Group (CSI) ... launch of the Specialty Pharmacy Podcast. A free, weekly ... at providing real-world education, discussion and context amongst specialty ... --> The Specialty Pharmacy Podcast, ... CSI Specialty Group Suzette DiMascio, CHE, CMCE, CPC, is ...
(Date:2/10/2016)... MINNEAPOLIS , Feb. 10, 2016 Urologix, ... for the treatment of Benign Prostatic Hyperplasia (BPH), announces ... Ash Keswani , a medical device industry veteran ... of the Limited Liability Company.  ... and service lines, Cooled ThermoTherapy™ and Prostiva® RF Therapy, ...
(Date:2/10/2016)... Feb. 10, 2016  Oxis International Inc. (OTC/QB: OXIS) ... was described as a "clinical trial triumph" after one ... into complete cancer remission. Daniel Vallera ... Masonic Cancer Center. --> Daniel Vallera ... Masonic Cancer Center. --> An article ...
Breaking Medicine Technology: