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.

Inhibiting miR-193a decreases tumor growth in SCC

Squamous cell carcinoma (SCC) is a common type of skin cancer. In this paper, Leif Ellisen and colleagues at Mass General Hospital investigated the p53-related proteins p63 and p73 in SCC cells, and discovered a feedback loop between p63, microRNAs (miRs), and p73. In a model of SCC, they found that inhibiting one of these miRs decreased tumor growth and made the cells more sensitive to chemotherapy, highlighting a new potential therapeutic target.

11 Jan 2011

Isis Pharmaceuticals announces addition of two new drugs to development pipeline

Isis Pharmaceuticals, announced today that it has added two new drugs to its development pipeline, ISIS-FGFR4Rx and ISIS-STAT3Rx.

7 Jan 2011

Alnylam presents ALN-VSP Phase I trial results for liver cancer

Alnylam Pharmaceuticals, a leading RNAi therapeutics company, today presented new clinical data from its ALN-VSP Phase I liver cancer trial in a presentation at the Dana-Farber Cancer Institute in Boston. Results from molecular analysis of human biopsy samples showed achievement of pharmacologically relevant siRNA drug levels in tissues.

5 Jan 2011

Santaris Pharma, Pfizer expand RNA-targeted medicine collaboration

Santaris Pharma A/S, a clinical-stage biopharmaceutical company focused on the research and development of mRNA and microRNA targeted therapies, and Pfizer Inc., today announced that the companies have expanded their collaboration directed to the development and commercialization of RNA-targeted medicines using Santaris Pharma A/S Locked Nucleic Acid (LNA) Drug Platform.

5 Jan 2011

Isis commences ISIS-EIF4ERx Phase 2 studies in non-small cell lung cancer and prostate cancer

Isis Pharmaceuticals, Inc. announced the initiation of two Phase 2 studies of ISIS-EIF4ERx in patients with non-small cell lung cancer and prostate cancer. These studies are part of Isis' broad Phase 2 development program designed to evaluate ISIS-EIF4ERx in multiple types of cancer. ISIS-EIF4ERx targets eukaryotic initiation factor-4E (eIF-4E), a traditionally "undruggable" target that is thought to promote tumor growth and metastasis in many cancers.

4 Jan 2011

Turns mortal heart attacks into non-mortal heart attacks -- NIH study

Three weeks of oral resveratrol or Longevinex- ingestion prior to an induced heart attack returned microRNA activity close to their pre-event levels in excised animal hearts. Among thousands of microRNA's studied, just six were attributed to exerting the majority of the gene-switching effects measured in the animal heart study - four microRNA optimally regulated by Longevinex- and two optimally by plain resveratrol.

28 Dec 2010

Exiqon announces introduction of GLP compliant services for miRNA biomarker screening

Exiqon A/S, a leading provider of technologies for biomarker detection, today announced the introduction of GLP compliant services for miRNA biomarker screening and diagnostic assay development for clinical trials.

27 Dec 2010

UH scientist evaluates microRNAs as potential treatment strategy for ovarian cancer

The day when an ovarian cancer patient can treat her tumor with a single, painless pill instead of a toxic drug cocktail is the ultimate goal of the pioneering research of a University of Houston scientist.

22 Dec 2010

Isis commences ISIS-APOCIIIRx Phase 1 trial in hypertriglyceridemia

Isis Pharmaceuticals, Inc. announced the initiation of a Phase 1 study of ISIS-APOCIIIRx, an antisense drug designed to lower triglycerides to treat a variety of diseases associated with elevated triglycerides. Hypertriglyceridemia, a condition characterized by elevated levels of triglycerides, is an independent risk factor for cardiovascular disease and is a component of numerous cardiovascular and metabolic diseases, including metabolic syndrome.

21 Dec 2010

Exiqon completes discovery phase program for early detection of colorectal cancer in blood

Exiqon A/S today announced the completion of the discovery phase in its program for early detection of colorectal cancer in blood.

21 Dec 2010

Alnylam Pharmaceuticals progress in delivery and translation of RNAi therapeutics

Alnylam Pharmaceuticals, a leading RNAi therapeutics company, presented new data at the 2010 International Chemical Congress of Pacific Basin Societies, being held in Honolulu, Hawaii, December 15-20.

17 Dec 2010

Scientists discover potential strategy for pancreatic cancer therapy

By determining what goes missing in human cells when the gene that is most commonly mutated in pancreatic cancer gets turned on, Johns Hopkins scientists have discovered a potential strategy for therapy.

15 Dec 2010

Stem cell biology offers great hope for eventual repair of body parts

Remarkable progress in understanding how stem cell biology works has been reported by a team of leading scientists, directed by experts at UC Santa Barbara. Their research has been published in the journal Cell Stem Cell.

13 Dec 2010

Exiqon announces launch of 6th generation of miRCURY LNA microRNA Arrays

Exiqon A/S, a leading supplier of high-value gene expression analysis products, today announced the launch of the 6th generation of miRCURY LNA microRNA Arrays for expression profiling of microRNA from human, mouse and rat.

6 Dec 2010

Asuragen, Novartis to develop ARQ BCR-ABL1 RNA IS Calibrators, laboratory software reporting tools

Asuragen, Inc. announced today that it has entered into an exclusive agreement with Novartis to develop worldwide Armored RNA Quant BCR-ABL1 RNA International Scale Calibrators and laboratory software reporting tools, intended to aid laboratories with standardization of BCR-ABL1 RT-qPCR testing to the International Scale. As part of this agreement, Asuragen will develop and, if successful, distribute the ARQ BCR-ABL1 IS RNA Calibrators and software reporting tools to laboratories globally directly or through its distributors.

6 Dec 2010

EPO upholds Alnylam's Tuschl II 1407044 patent

Alnylam Pharmaceuticals, Inc., a leading RNAi therapeutics company, announced today that the European Patent Office (EPO) has fully upheld its Tuschl II '044 (EP 1407044) patent in oral opposition proceedings held in Munich. Specifically, the originally granted claims of the '044 patent were upheld without any modification and were deemed valid and supported by the EPO.

3 Dec 2010

MicroRNA linked to mosquito blood digestion and egg development identified

Each year, dengue fever infects as many as 100 million people while yellow fever is responsible for about 30,000 deaths worldwide. Both diseases are spread by infected female Aedes aegypti mosquitoes, which require vertebrate blood to produce eggs. The blood feeding and the egg development are tightly linked to how the mosquito transmits the disease-causing virus.

2 Dec 2010

Mount Sinai’s instructor receives Liz Tilberis Grant from OCRF

AnaLisa DiFeo, PhD, Instructor in the Department of Genetics and Genomic Sciences at Mount Sinai School of Medicine, has been honored by the Ovarian Cancer Research Fund (OCRF) with the Liz Tilberis Grant.

2 Dec 2010

miRagen and t2cure enter licensing agreement for microRNA 92 technology

miRagen Therapeutics, Inc., a biopharmaceutical company focused on improving patients' lives by developing innovative microRNA (miRNA)-based therapeutics for cardiovascular and muscle disease, and t2cure, a clinical stage biopharmaceutical company developing progenitor cell-based regenerative therapeutics for cardiac or peripheral vascular diseases, announced today that they have entered into a licensing agreement

30 Nov 2010

Overexpression of microRNA 125b can cause leukemia: Research

Whitehead Institute researchers have shown in mouse models that overexpression of the microRNA 125b (miR-125b) can independently cause leukemia and accelerate the disease's progression. Their results are published in this week's online edition of the Proceedings of the National Academy of Sciences (PNAS).

30 Nov 2010