Navigation Links
Low micro-RNA level linked to high gene activity in AML

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
Ohio State University Medical Center

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:
(Date:6/26/2016)... ... June 26, 2016 , ... PawPaws brand pet supplements ... that was developed to enhance the health of felines. The formula is all-natural and ... main herbs in the PawPaws Cat Kidney Support Supplement Soft Chews are ...
(Date:6/25/2016)... ... June 25, 2016 , ... The temporary closing of Bruton Memorial Library on June 21 due ... up a new, often overlooked aspect of head lice: the parasite’s ability to live away ... a common occurrence, but a necessary one in the event that lice have simply gotten ...
(Date:6/25/2016)... ... June 25, 2016 , ... On Friday, June 10, Van ... Wellness at Work award to iHire in recognition of their exemplary accomplishments in worksite ... 7th annual Maryland Workplace Health & Wellness Symposium at the BWI Marriott in Linthicum ...
(Date:6/24/2016)... ... , ... Marcy was in a crisis. Her son James, eight, was out of control. Prone ... physically. , “When something upset him, he couldn’t control his emotions,” remembers Marcy. “If ... at my other children and say he was going to kill them. If we ...
(Date:6/24/2016)... ... June 24, 2016 , ... Topical BioMedics, Inc, makers of Topricin and MyPainAway Pain Relief Products, ... minimum wage raise to $12 an hour by 2020 and then adjusting it yearly to ... value of the minimum wage, assure the wage floor does not erode again, and make ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... -- Research and Markets has announced the addition ... report to their offering. ... The World Market for Companion Diagnostics covers the world ... in the report includes the following: , ... by Region (N. America, EU, ROW), 2015-2020 , World ...
(Date:6/24/2016)...  Arkis BioSciences, a leading innovator in the ... cerebrospinal fluid treatments, today announced it has secured ... led by Innova Memphis, followed by Angel Capital ... Arkis, new financing will accelerate the commercialization of ... of its in-licensed Endexo® technology. ...
(Date:6/23/2016)... Research and Markets has announced ... Type (Organic Chemical (Sugar, Petrochemical, Glycerin), Inorganic Chemical), Functionality ... - Global Forecast to 2021" report to their ... global pharmaceutical excipients market is projected to reach USD ... in the forecast period 2016 to 2021. ...
Breaking Medicine Technology: