Navigation Links
Cleveland Clinic researcher finds genetic mutation in castration-resistant prostate cancer
Date:8/29/2013

AUG. 29, 2013, Cleveland:

The mutation occurs in the androgen-synthesizing enzyme 3βHSD1 in castration-resistant prostate cancer (CRPC), according to research published online today in Cell. This mutation enables the tumor to make its own supply of androgens, a hormone that fuels the growth of the prostate cancer.

Prostate cancer requires a constant supply of androgens in order to sustain itself. The current standard of care for patients with metastatic prostate cancer is medical castration, the ability to interfere with the body's production of testosterone (androgens) using medications that disrupt the process. Oftentimes, metastatic prostate cancer flourishes despite the lack of testosterone in the bloodstream, creating CRPC. These tumors are able to exist without the body's supply of testosterone by creating androgens within the tumor cell; however, increased androgen synthesis has not yet been attributable to any known mutations. The Cleveland Clinic discovery shows that the 3βHSD1 mutation makes this enzyme hyperactive to create androgens.

"This discovery gives us the ability to identify molecular subtypes of prostate cancer known to resist treatment. By finding the mutated enzyme, we can now investigate treatments that block it. This kind of strategy is the crux of personalized medicine which is currently used as the standard of care for some forms of lung cancer and melanoma," said Nima Sharifi, M.D., Kendrick Family Chair for Prostate Cancer Research at Cleveland Clinic, who led the research.

The 3βHSD1 mutation can occur within CRPC tumors and it can also come from germline DNA, which is inherited from maternal and paternal sources.

The research found that laboratory models of human prostate cancer fall into two categories of androgen synthesis: those that make androgens slowly and those that do so rapidly. Next, they found that the 3βHSD1 mutation explains the difference between these two categories and that DNA from some patient tumors also contains this mutation. The mutation works by opening the floodgates to androgen synthesis, essentially throwing fuel on the fire that promotes tumor progression.

In an era of personalized cancer care, there is increased focus on defining and treating cancer by its genetic abnormalities. Tumor-promoting enzyme mutations in several cancers have been identified and, subsequently, have led to the development of targeted drug therapies, improving outcomes for patients.

"The past decade has seen an explosion of molecularly targeted therapies that are matched to specific mutations in a given patient's tumor," says Dr. Sharifi. "However, no drug-targeting based on enzyme mutations exists for the standard treatment of metastatic CRPC. With this finding, we have the opportunity for matching a mutant disease-driving biomarker with a pharmacologic inhibitor."

Prostate cancer is the most common cancer in men, with nearly 240,000 new cases diagnosed each year in the United States. According to the American Cancer Society, there will be an estimated 30,000 deaths due to prostate cancer in 2013. Almost every man who dies of prostate cancer dies with castration-resistant prostate cancer.


'/>"/>

Contact: Stephanie Jansky
JANSKYS@ccf.org
216-363-5869
Cleveland Clinic
Source:Eurekalert

Related medicine news :

1. CE Lectures on the Dental Treatment of Snoring and Sleep Apnea Include Rochester, Cleveland and Ft. Lauderdale, as Sleep Seminar Destinations
2. Cleveland Indians vs. Detroit Tigers Tickets: Cheap Concert Tickets Slashes Prices on All Indians vs. Tigers Tickets for August 5th - August 8th Series Progressive Field
3. National Transitions of Care Coalition to Host Regional Summit in Cleveland
4. Maroon 5 & Kelly Clarkson Ticket Prices Slashed for Concerts in Long Island, Holmdel, Cincinnati, Pittsburgh, Camden/Philly, Boston/Mansfield, Chicago, Cleveland & Detroi
5. Explorys Proud to Sponsor Cleveland GiveCamp
6. NEONI Participates in Healthcare Career Event at Cleveland Convention Center Grand Opening
7. Cleveland Clinic Laboratories to provide testing and diagnostic services to ACL Laboratories
8. Book of Mormon Tickets: Prices Slashed on Book of Mormon Tickets in New York, Chicago, Cleveland, Buffalo, Washington DC, Minneapolis, Houston and San Antonio
9. Cancer Survivor David Emerson Awarded Volkswagen Cup at Cleveland Marathon
10. Nine Inch Nails Tickets (NIN) Tickets Go On Public Sale for St. Paul, Toronto, Cleveland, Detroit, Boston, Brooklyn, Newark, Washington DC, Las Vegas, Portland on June 14th
11. Justin Timberlake Tickets: Cheap Concert Tickets Announces that Justin Timberlake Tickets Go Onsale 6/3 for Concerts in Omaha, St. Paul, Fargo, Pittsburgh, Cleveland, Indianapolis and St. Louis
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/12/2016)... ... 12, 2016 , ... CDRH Enforcement Trends: , Back to the Future , Feb. 25, 2016 ... Winston Churchill said, “Those who don’t learn from history are doomed to repeat it.” , ... come knocking this year. But that takes time. , Take a close look at ...
(Date:2/12/2016)... ... 12, 2016 , ... Each year, the American Physical Therapy Association (APTA) offers ... the Anaheim Convention Center. Almost 10,000 physical therapists across the country are expected to ... more about their chosen field and network with their colleagues. As in years ...
(Date:2/12/2016)... ... , ... Coco Libre, the maker of coconut water beverages with a purpose, ... Event. Coco Libre will offer musicians and celebrities the company’s signature Organic Coconut Water, ... gifting suite, held this year at the W Hollywood Hotel, has become a pre-show ...
(Date:2/12/2016)... ... February 12, 2016 , ... ... at Zuckerberg San Francisco General Hospital on April 5-7. The series is a ... create new habits. The workshops cover a broad range of topics, including coaching ...
(Date:2/12/2016)... (PRWEB) , ... February 12, 2016 , ... Every winter, ... , This winter the West Penn Burn Center, part of the Allegheny ... #1, to bring you the “Space Heaters Need Space” campaign. , ...
Breaking Medicine News(10 mins):
(Date:2/11/2016)... Feb. 11, 2016  NOIT™ Research LLC, a private, ... of Change" campaign to assist needy families in obtaining ... unit sold between February 10, 2016 and March 31, ... needy family. The NOIT is an auditory stimulus that ... develop language skills. Beth Shier , ...
(Date:2/11/2016)... , Feb. 11, 2016 AAIPharma ... provider of custom manufacturing and development services for ... sterile fill-finish capabilities and capacity in its ... in demand has driven several recent investments. ... it had one filling line with small-scale lyophilization. ...
(Date:2/11/2016)... PORTLAND, Ore. , Feb. 11, 2016 ... to announce the acquisition of SolutionsRx, a full-service 340B ... hospitals. Along with providing traditional contract pharmacy services, SolutionsRx ... assist clients in navigating the complex 340B regulatory environment. ... Wellpartner. --> James R. Love , CEO ...
Breaking Medicine Technology: