Navigation Links
Low micro-RNA level linked to high gene activity in AML
Date:3/6/2008

COLUMBUS, Ohio A new study suggests that a type of acute leukemia may occur in part because abnormally low levels of one small molecule result in the over-activity of genes important to the disease.

The research involved patients with acute myeloid leukemia (AML) and a gene mutation called NPM1, an alteration seen in about one-third of adult AML cases.

The findings suggest new therapeutic targets for treating the disease and should improve the understanding of AML, researchers say.

The study showed that a type of microRNA molecules important in controlling cell development and proliferation regulates two genes whose elevated activity has been linked to leukemia in humans and proven to cause leukemia in mice.

The two genes belong to the Hox family of genes, known to play a critical role in embryonic development and blood-cell development.

The study, led by researchers at the Ohio State University Comprehensive Cancer Center, was published online Feb. 28 in the Proceedings of the National Academy of Sciences.

Weve shown that low levels of a microRNA called miR-204 are at least partly responsible for the high activity of these Hox genes, says first author Dr. Ramiro Garzon, an Ohio State cancer researcher.

If this is verified, and if we can develop a drug to modulate this microRNA, it may provide a new therapeutic intervention for these patients.

For this study, the investigators examined microRNAs levels in leukemia cells from 85 patients. They also looked for mutations in two genes in the leukemic cells: NPM1 and FLT3 (pronounced Flit-3).

The pattern of microRNA molecules present in the cells enabled the researchers to distinguish the 55 patients with mutated NPM1 genes from those with a normal gene.

Furthermore, 26 of the 85 patients had FLT3 mutations. These cases also had high levels of a microRNA called miR-155. Further experiments showed that while the high levels of miR-155 were closely associated with FLT3 mutations, they were independent of the mutation (i.e., it did not cause the high levels).

This is significant, says Garzon, an assistant professor of internal medicine. We already have drugs that target FLT3, but they are not effective by themselves. This finding suggests that if we develop a drug that targets miR-155, and combine it with a FLT3 inhibitor, we might achieve a more complete response in these patients.

Garzon and his colleagues are studying that possibility now.


'/>"/>

Contact: Darrell E. Ward
darrell.ward@osumc.edu
614-293-4833
Ohio State University Medical Center
Source:Eurekalert

Related medicine news :

1. Estrogen Levels in Blood Predict Breast Cancers Return
2. Mother-daughter conflict, low serotonin level may be deadly combination
3. Atypical protein kinase C stabilizes SRC-3 levels in breast cancer cells
4. Next Step(R) Institute of Integrative Medicine, Inc. Takes Wellness to a New Level With 2008 Series of Wellness Weeks
5. Moderate Aerobic Fitness Levels May Cut Stroke Risk
6. Novel link between excessive nutrient levels and insulin resistance
7. Cleveland Clinic Collaborates with Google
8. ADAMS Performs Management Services for University Hospitals $600 Million Expansion/Renovation Program in Cleveland, OH
9. Cleveland Clinic Press Consumer Health Book Empowers and Gives Hope to People with Epilepsy
10. Climb to Fight Breast Cancer Offers Peaks for Every Skill Level
11. Oscar Pistorius Aims to Compete on Level Playing Field at 2008 Beijing Olympics
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/16/2017)... ... January 17, 2017 , ... Recently, patients and staff from A ... other volunteers and organizations in support of the annual Binder Park Zoo Halloween celebration ... up in colorful costumes of all designs coming out to enjoy games, face painting, ...
(Date:1/16/2017)... ... ... Anybody who may be looking for a substance abuse rehabilitation program with ... a holistic treatment center for addiction located in Marne, MI. This video, which can ... and staff that visited the 2016 Recovery Palooza support event in nearby Grand Rapids. ...
(Date:1/16/2017)... ... January 16, 2017 , ... Atlanta-based incentive company ... in the wheelchair accessibility industry, BraunAbility . Incentive Solutions will provide BraunAbility ... accessible vehicles. With this new incentive plan, BraunAbility plans to continue their tradition ...
(Date:1/16/2017)... (PRWEB) , ... January 16, 2017 , ... One thing ... only to treat, but to test for, as well. The money spent screening for ... year.(1) Doctors in the U.S. screen patients for cancer more than in any other ...
(Date:1/15/2017)... ... 15, 2017 , ... Going above and beyond the practical ... better communities around the world by offering the Gensuite team and their services ... team members to become involved in a cause that is bigger than themselves ...
Breaking Medicine News(10 mins):
(Date:1/16/2017)... TORONTO , Jan. 16, 2017 When synthetic ... to market their product as top-rate. They offered free samples, ... top-notch customer service. Soon, business was booming. ... often described as 100 times more powerful than morphine, has ... in last 2 years. One dealer,s recorded fentanyl ...
(Date:1/16/2017)... PUNE, India , January 16, 2017 /PRNewswire/ ... Research, titled, "Vital Signs Monitoring Devices Market by Type and ... that the global vital signs monitoring devices market size was ... $5,491 million by 2022, growing at a CAGR of 5.8% ... was the leading regional market in global vital signs monitoring ...
(Date:1/16/2017)... PUNE, India , January 16, 2017 ... & Its Derivatives Market by Product Type (Methyl, ... Personal Care, Foods & Beverages, Surface Coatings ... 2021", published by MarketsandMarkets, the market was ... and is projected to reach USD 6.41 ...
Breaking Medicine Technology: