MicroRNA News and Research

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In genetics, microRNAs (miRNA) are single-stranded RNA molecules of 21-23 nucleotides in length, which regulate gene expression. miRNAs are encoded by genes from whose DNA they are transcribed but miRNAs are not translated into protein (i.e. they are non-coding RNAs); instead each primary transcript (a pri-miRNA) is processed into a short stem-loop structure called a pre-miRNA and finally into a functional miRNA. Mature miRNA molecules are partially complementary to one or more messenger RNA (mRNA) molecules, and their main function is to down-regulate gene expression.

Molecular similarity between one sub-type of breast cancer and ovarian cancer

A team of scientists with The Cancer Genome Atlas program reports their genetic characterization of 800 breast tumors, including finding some of the genetic causes of the most common forms of breast cancer, providing clues for new therapeutic targets, and identifying a molecular similarity between one sub-type of breast cancer and ovarian cancer.

24 Sep 2012

MicroRNA-145 gene therapy can drastically reduce severity and progression of atherosclerosis

Researchers at St. Michael's Hospital are one step closer to understanding why plaque bursts in coronary arteries and causes heart attacks.

11 Sep 2012

New findings establish connection between microRNAs and cellular metabolism

New findings establish a connection between microRNAs and cellular metabolism, suggesting that a drug designed to inhibit these tiny molecules -- once considered to be "junk" DNA -- would have a positive effect against obesity.

7 Sep 2012

Alnylam announces complete results from ALN-RSV01 Phase IIb trial on RSV infection

Alnylam Pharmaceuticals, Inc., a leading RNAi therapeutics company, announced today complete results from its Phase IIb trial with ALN-RSV01 for the treatment of respiratory syncytial virus (RSV) infection in lung transplant patients.

6 Sep 2012

LIN28 protein can bind directly to thousands of messenger RNAs

A study led by researchers at the UC San Diego Stem Cell Research program and funded by the California Institute for Regenerative Medicine (CIRM) looks at an important RNA binding protein called LIN28, which is implicated in pluripotency and reprogramming as well as in cancer and other diseases.

6 Sep 2012

Fusion-negative prostate tumours display more aberrant DNA methylations

In about half of all prostate tumours, there are two genetic areas that are fused with one another. When this is not the case, the exact way cancer cells originate in prostate tumours was not clear until now.

5 Sep 2012

Scientists identify master regulator essential for progression and relapse of deadly brain cancer

A*STAR scientists have identified a biomarker of the most lethal form of brain tumours in adults- glioblastoma multiforme. The scientists found that by targeting this biomarker and depleting it with a potential drug, they were able to prevent the progression and relapse of the brain tumour.

5 Sep 2012

GWSMHS professor to study correlation between genetics and susceptibility to drug abuse

Norman H. Lee, Ph.D., professor of pharmacology at the George Washington University School of Medicine and Health Sciences (SMHS), received a total of $405,001 in grant funding from the National Institute on Drug Abuse (NIDA) to continue to study the correlation between genetics and susceptibility to drug abuse.

30 Aug 2012

People with guanine version of rs55705857 SNP more likely to develop gliomas

People who carry a "G" instead of an "A" at a specific spot in their genetic code have roughly a six-fold higher risk of developing certain types of brain tumors, a Mayo Clinic and University of California, San Francisco study has found. The

27 Aug 2012

Influenza virus can change microRNA expression to control immune responses in human lung cells

When you are hit with the flu, you know it immediately -- fever, chills, sore throat, aching muscles, fatigue. This is your body mounting an immune response to the invading virus. But less is known about what is happening on the molecular level.

24 Aug 2012

New results describe development of DC cancer vaccine with enhanced immunogenic potential

Alnylam Pharmaceuticals, Inc., a leading RNAi therapeutics company, and collaborators at Radboud University Nijmegen Medical Centre in the Netherlands announced today that they have published new pre-clinical results in the journal Cancer Immunology Immunotherapy describing the development of a dendritic cell (DC) cancer vaccine with enhanced immunogenic potential.

23 Aug 2012

Researchers discover why people with sickle cell disease get milder cases of malaria

Researchers at Duke University Medical Center may finally have discovered why people with sickle cell disease get milder cases of malaria than individuals who have normal red blood cells.

16 Aug 2012

Study investigates role of inflammation in ALS mouse model

Amyotrophic lateral sclerosis (ALS) is a progressive disease wherein the cells of the central nervous system (CNS) involved in movement and coordination are destroyed. Although the mechanism of ALS is not completely understood, inflammation is believed to play a role in the disease process. A recent study by Howard Weiner and colleagues at Harvard Medical School and Tufts School of Medicine investigated the role of inflammation in a mouse model of ALS.

7 Aug 2012

Researchers discover genetic process that can restore function to a CF defective protein

Researchers at the University of Iowa Carver College of Medicine have discovered a genetic process that can restore function to a defective protein, which is the most common cause of cystic fibrosis (CF).

2 Aug 2012

Gluconeogenesis severely compromised in HCC by IL6-Stat3-mediated activation of miR-23a

As liver cancer develops, tumor cells lose the ability to produce and release glucose into the bloodstream, a key function of healthy liver cells for maintaining needed blood-sugar levels.

31 Jul 2012

Progress with GSK in advancing VaxiRNA technology earns Alnylam $3.2M milestone payment

Alnylam Pharmaceuticals, Inc., a leading RNAi therapeutics company, announced today that it has earned a development milestone payment from GlaxoSmithKline, totaling $3.2 million. The milestone payment is related to progress in the companies' collaboration on the use of VaxiRNA technology for the production of GSK influenza vaccine.

30 Jul 2012

Research finds new gene involved in epilepsy

New research conducted by neuroscientists from the Royal College of Surgeons in Ireland (RCSI) published in Nature Medicine has identified a new gene involved in epilepsy and could potentially provide a new treatment option for patients with epilepsy.

23 Jul 2012

Researchers discover potential drug targets that might reduce ventilator-induced lung inflammation

When hospital patients need assistance breathing and are placed on a mechanical ventilator for days at a time, their lungs react to the pressure generated by the ventilator with an out-of-control immune response that can lead to excessive inflammation, new research suggests.

19 Jul 2012

Targeted regulation of microRNA-125b may lead to effective prostate cancer therapies

A small, naturally occurring nucleic acid sequence, called a microRNA, known to regulate a number of different cancers, appears to alter the activity of the androgen receptor, which plays a critical role in prostate cancer.

18 Jul 2012

Positive results from Alnylam’s ALN-TTR02 Phase I trial on TTR-mediated amyloidosis

Alnylam Pharmaceuticals, Inc., a leading RNAi therapeutics company, announced today the achievement of positive clinical results from its Phase I trial with ALN-TTR02, an RNAi therapeutic targeting the transthyretin (TTR) gene for the treatment of TTR-mediated amyloidosis.

16 Jul 2012