Featured Research

from universities, journals, and other organizations

Knocking Out Survival Protein Could Aid Leukemia Treatment

Date:
April 22, 2007
Source:
Ohio State University
Summary:
An effective way to fight leukemia might be to knock out a specific protein that protects cancer cells from dying, a new study shows. The findings suggest that a drug that can block this "survival protein" might on its own be an effective therapy.

An effective way to fight leukemia might be to knock out a specific protein that protects cancer cells from dying, a new study shows. The findings suggest that a drug that can block this “survival protein” might on its own be an effective therapy.

Related Articles


But such a drug used in combination with several existing drugs might also offer an effective one-two punch against drug-resistant forms of chronic lymphocytic leukemia (CLL) and acute lymphoblastic leukemia (ALL). The two forms of cancer kill about 20,500 Americans yearly.

The survival protein is called Mcl1. It usually helps keep normal cells healthy and is involved in the development of the components of the immune system, but it can also help prolong survival of cancer cells.

Cells with an overabundance of the protein are also more resistant to anticancer drugs such as rituximab, which has revolutionized the treatment of certain chronic and acute leukemias.

“Our findings demonstrate that Mcl1 may be an effective target for drugs directed against CLL and ALL,” says principal investigator John C. Byrd, professor of internal medicine and director of the hematologic malignancies program at Ohio State's James Cancer Hospital and Solove Research Institute.

“These results give us a rationale for lowering the amount of this protein in CLL cells and suggest that this should enhance the action of rituximab and perhaps other agents as well.”

Rituximab is an antibody-based drug that targets CLL and ALL cells and causes the cells to self-destruct. “We've shown that knocking down Mcl1 can, by itself, cause CLL cells to die, and that this effect might enhance the activity of rituximab,” says first author Rehan Hussain, a postdoctoral fellow with Ohio State's Comprehensive Cancer Center.

Byrd, Hussain and their collaborators conducted this research using cancer cells from 17 CLL patients and ALL cell lines grown in the laboratory.

The investigators placed molecules called small interfering RNA (siRNA) inside the cells and found that the tiny molecules greatly reduced the amount of the survival protein, causing many of the cells to die. The effect was the same even in cells that came from patients with advanced cancer or from patients with tumors that resisted conventional treatment.

When the researchers treated cells with both siRNA and the drug rituximab, the combination killed significantly more leukemia cells than the drug alone. Overall, says Byrd, “Our data indicate that specifically targeting Mcl1 might be effective in the treatment of CLL, particularly when combined with rituximab.”

Funding from the National Cancer Institute, the Leukemia & Lymphoma Society and the D. Warren Brown Foundation supported this research. Byrd is the D. Warren Brown Professor of Leukemia Research and a Clinical Scholar of the Leukemia & Lymphoma Society. The study by researchers at the Ohio State University Comprehensive Cancer Center is published online in the journal Clinical Cancer Research.


Story Source:

The above story is based on materials provided by Ohio State University. Note: Materials may be edited for content and length.


Cite This Page:

Ohio State University. "Knocking Out Survival Protein Could Aid Leukemia Treatment." ScienceDaily. ScienceDaily, 22 April 2007. <www.sciencedaily.com/releases/2007/04/070420175914.htm>.
Ohio State University. (2007, April 22). Knocking Out Survival Protein Could Aid Leukemia Treatment. ScienceDaily. Retrieved April 19, 2015 from www.sciencedaily.com/releases/2007/04/070420175914.htm
Ohio State University. "Knocking Out Survival Protein Could Aid Leukemia Treatment." ScienceDaily. www.sciencedaily.com/releases/2007/04/070420175914.htm (accessed April 19, 2015).

Share This


More From ScienceDaily



More Health & Medicine News

Sunday, April 19, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Our Love Of Puppy Dog Eyes Explained By Science

Our Love Of Puppy Dog Eyes Explained By Science

Newsy (Apr. 17, 2015) Researchers found a spike in oxytocin occurs in both humans and dogs when they gaze into each other&apos;s eyes. Video provided by Newsy
Powered by NewsLook.com
Dr. Oz Under Fire For 'Quack Treatments' Yet Again

Dr. Oz Under Fire For 'Quack Treatments' Yet Again

Newsy (Apr. 17, 2015) Ten doctors signed a letter urging Columbia University to drop Dr. Oz as vice chair of its department of surgery, saying he plugs "quack" treatments. Video provided by Newsy
Powered by NewsLook.com
Scientists Find Link Between Gestational Diabetes And Autism

Scientists Find Link Between Gestational Diabetes And Autism

Newsy (Apr. 17, 2015) Researchers who analyzed data from over 300,000 kids and their mothers say they&apos;ve found a link between gestational diabetes and autism. Video provided by Newsy
Powered by NewsLook.com
Video Messages Help Reassure Dementia Patients

Video Messages Help Reassure Dementia Patients

AP (Apr. 17, 2015) Family members are prerecording messages as part of a unique pilot program at the Hebrew Home in New York. The videos are trying to help victims of Alzheimer&apos;s disease and other forms of dementia break through the morning fog of forgetfulness. (April 17) Video provided by AP
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