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.

MicroRNAs key to memory and learning process

Studying tiny bits of genetic material that control protein formation in the brain, Johns Hopkins scientists say they have new clues to how memories are made and how drugs might someday be used to stop disruptions in the process that lead to mental illness and brain wasting diseases.

5 Mar 2012

Certain microRNAs key to controlling actions of BDNF, linked to brain cell survival

5 Mar 2012

New link between polyamine regulation and ESC biology

A*STAR scientists have for the first time, identified that precise regulation of polyamine levels is critical for embryonic stem cell (ESC) self-renewal - the ability of ESCs to divide indefinitely - and directed differentiation.

2 Mar 2012

Scientists identify specific pathways behind breast cell's transformation into cancer

Although it's widely accepted that inflammation is a critical underlying factor in a range of diseases, including the progression of cancer, little is known about its role when normal cells become tumor cells. Now, scientists from the Florida campus of The Scripps Research Institute have shed new light on exactly how the activation of a pair of inflammatory signaling pathways leads to the transformation of normal breast cells to cancer cells.

24 Feb 2012

PNAS selects six papers to receive 2011 Cozzarelli Prize

The Proceedings of the National Academy of Sciences (PNAS) Editorial Board has selected six papers published by PNAS in 2011 to receive the Cozzarelli Prize, an award that recognizes outstanding contributions to the scientific disciplines represented by the National Academy of Sciences.

22 Feb 2012

Asuragen introduces miRInform test for diagnosis of pancreatic ductal adenocarcinoma

Asuragen, Inc. announced today the immediate availability of the miRInform® Pancreas Test in its CAP-accredited CLIA Laboratory. miRInform® Pancreas was developed to aid physicians in the diagnosis and management of pancreatic ductal adenocarcinoma (PDAC) when cytology is inconclusive. The test evaluates expression levels of seven miRNAs in Fine Needle Aspirate (FNA) specimens of pancreatic masses.

17 Feb 2012

New preclinical data from Regulus' miR-21 study on kidney fibrosis

Regulus Therapeutics Inc., a biopharmaceutical company leading the discovery and development of innovative medicines targeting microRNAs, today announced that new preclinical data investigating the role of microRNA-21 (miR-21) in the treatment of kidney fibrosis has been published in the journal Science Translational Medicine.

17 Feb 2012

Epigenetic mechanisms maintain tolerance in T cells specific for self antigens

At the most basic level, the immune system must distinguish self from non-self, that is, it must discriminate between the molecular signatures of invading pathogens (non-self antigens) and cellular constituents that usually pose no risk to health (self-antigens).

14 Feb 2012

Alnylam commences underwritten public offering of 7,000,000 shares of common stock

Alnylam Pharmaceuticals, Inc., a leading RNAi therapeutics company, today announced that it has commenced an underwritten public offering of 7,000,000 shares of its common stock. All of these shares are being sold by Alnylam.

14 Feb 2012

New cERD method can detect RNAi activity in biological fluids

Alnylam Pharmaceuticals, Inc., a leading RNAi therapeutics company, announced today that its scientists have discovered a novel method for monitoring RNAi activity in blood samples, representing a potential major advance for future development of RNAi therapeutics, other therapeutic modalities, and diagnostics.

10 Feb 2012

Researchers discover molecules that differentiate early-stage breast tumors from invasive cancer

Researchers have discovered a restricted pattern of molecules that differentiate early-stage breast tumors from invasive, life-threatening cancer. They also found a similar molecular signature that correlated with the aggressiveness of invasive tumors, and with the time to metastasis and overall survival.

8 Feb 2012

Study describes molecular pathway that controls rest and activity rhythms

The molecular pathway that carries time-of-day signals from the body's internal clock to ultimately guide daily behavior is like a black box, says Amita Sehgal, PhD, the John Herr Musser Professor of Neuroscience and Co-Director, Comprehensive Neuroscience Center, at the Perelman School of Medicine, University of Pennsylvania.

8 Feb 2012

Alnylam receives U.S. patent allowance for LNP platform

Alnylam Pharmaceuticals, Inc., a leading RNAi therapeutics company, announced today that the United States Patent and Trademark Office (USPTO) has issued a Notice of Allowance for patent application number 12/813,448, covering the company's proprietary second generation lipid nanoparticle (LNP) platform, including the "MC3" lipid.

30 Jan 2012

Combination of gefitinib and miRNA-inhibitor might effectively treat NSCLC

New research published in Nature Medicine indicates that targeted drugs such as gefitinib might more effectively treat non-small cell lung cancer if they could be combined with agents that block certain microRNAs.

20 Jan 2012

MSC-mediated RNAi transfer holds promise for Huntington's disease

A team of researchers at the UC Davis Institute for Regenerative Cures has developed a technique for using stem cells to deliver therapy that specifically targets the genetic abnormality found in Huntington's disease, a hereditary brain disorder that causes progressive uncontrolled movements, dementia and death.

20 Jan 2012

USPTO issues new patent to PBL's RNAi technology

Plant Bioscience Limited (PBL) is pleased to announce that the United States Patent and Trademark Office (USPTO) has issued out US Patent No. 8,097,710 with fundamental claims directed to methods of inducing gene silencing using short RNA molecules, or DNA constructs encoding short RNA molecules, in a wide range of organisms, including in plants and humans.

19 Jan 2012

Alnylam sues Tekmira over LNP-formulated siRNA molecules

Alnylam Pharmaceuticals, Inc., a leading RNAi therapeutics company, announced today that it has filed a patent infringement lawsuit against Tekmira Pharmaceuticals Corporation in the U.S. District Court of the District of Massachusetts.

18 Jan 2012

UCSF, Sanofi enter $3.1 million collaboration to identify diabetes drug targets

The University of California, San Francisco has signed an alliance with international pharmaceutical company Sanofi to share expertise in diabetes research and identify drug targets that could lead to new therapies for both type 1 and type 2 diabetes.

11 Jan 2012

miRagen, Silence partner to assess delivery potential of novel miRNA-based therapeutics

Silence Therapeutics plc, a leading RNA interference (RNAi) therapeutics company, announces that it has signed an agreement with miRagen Therapeutics, Inc., to assess the delivery potential of Silence's proprietary DBTC delivery system with miRagen's novel microRNA-based therapeutics.

9 Jan 2012

Alnylam files CTA with the U.K. MHRA to initiate ALN-TTR02 Phase I trial in ATTR

Alnylam Pharmaceuticals, Inc., a leading RNAi therapeutics company, announced today that it has filed a Clinical Trial Application (CTA) with the U.K. Medicines and Healthcare products Regulatory Agency (MHRA) to initiate a Phase I clinical trial with ALN-TTR02, an RNAi therapeutic targeting transthyretin (TTR) for the treatment of TTR-mediated amyloidosis.

7 Jan 2012