Featured Research

from universities, journals, and other organizations

Antitumor Compound Blocks Heat Shock Protein

Date:
June 14, 2007
Source:
Journal of the National Cancer Institute
Summary:
Deguelin, a natural compound known to have antitumor properties, appears to disrupt the function of heat shock protein 90 (Hsp90), which cancer cells may need to grow. Heat shock proteins are expressed in response to higher temperatures and help prevent disruptions in protein folding. Hsp90, in particular, is often overexpressed in cancer cells and maintains stability and function of several oncoproteins, known as client proteins.

Deguelin, a natural compound known to have antitumor properties, appears to disrupt the function of heat shock protein 90 (Hsp90), which cancer cells may need to grow.

Heat shock proteins are expressed in response to higher temperatures and help prevent disruptions in protein folding. Hsp90, in particular, is often overexpressed in cancer cells and maintains stability and function of several oncoproteins, known as client proteins.

Seung Hyun Oh, Ph.D., D.V.M., of the University of Texas M. D. Anderson Cancer Center in Houston, and colleagues investigated whether deguelin inhibits the function of Hsp90. Mice with transplanted human non--small-cell lung cancer, head and neck cancer, stomach cancer, or prostate cancer were treated with deguelin or placebo twice a day for 15-28 days.

The researchers showed that deguelin directly binds to Hsp90 and inhibits its functional activity, which results in a reduction in the expression of its client proteins. Additionally, deguelin reduced tumor growth in mice without any detectable toxic side effects.

"Extensive and complete chronic toxicity testing in clinical trials is warranted before the further development of deguelin as an anticancer therapeutic agent," the authors write.


Story Source:

The above story is based on materials provided by Journal of the National Cancer Institute. Note: Materials may be edited for content and length.


Cite This Page:

Journal of the National Cancer Institute. "Antitumor Compound Blocks Heat Shock Protein." ScienceDaily. ScienceDaily, 14 June 2007. <www.sciencedaily.com/releases/2007/06/070612183000.htm>.
Journal of the National Cancer Institute. (2007, June 14). Antitumor Compound Blocks Heat Shock Protein. ScienceDaily. Retrieved October 2, 2014 from www.sciencedaily.com/releases/2007/06/070612183000.htm
Journal of the National Cancer Institute. "Antitumor Compound Blocks Heat Shock Protein." ScienceDaily. www.sciencedaily.com/releases/2007/06/070612183000.htm (accessed October 2, 2014).

Share This



More Health & Medicine News

Thursday, October 2, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Pregnancy Spacing Could Have Big Impact On Autism Risks

Pregnancy Spacing Could Have Big Impact On Autism Risks

Newsy (Oct. 1, 2014) A new study says children born less than one year and more than five years after a sibling can have an increased risk for autism. Video provided by Newsy
Powered by NewsLook.com
Ebola Patient Told Hospital He Was from Liberia

Ebola Patient Told Hospital He Was from Liberia

AP (Oct. 1, 2014) The first Ebola patient diagnosed in the U.S. initially went to a Dallas emergency room last week but was sent home, despite telling a nurse that he had been in disease-ravaged West Africa, the hospital acknowledged Wednesday. (Oct. 1) Video provided by AP
Powered by NewsLook.com
Robotic Hair Restoration

Robotic Hair Restoration

Ivanhoe (Oct. 1, 2014) A new robotic procedure is changing the way we transplant hair. The ARTAS robot leaves no linear scarring and provides more natural results. Video provided by Ivanhoe
Powered by NewsLook.com
Insertable Cardiac Monitor

Insertable Cardiac Monitor

Ivanhoe (Oct. 1, 2014) A heart monitor the size of a paperclip that can save your life. The “Reveal Linq” allows a doctor to monitor patients with A-Fib on a continuous basis for up to 3 years! Video provided by Ivanhoe
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins