Archives for 2009

MicroRNAs in Human Health and Disease

July 1, 2009 | by

The central dogma of molecular biology deals with the detailed residue-by-residue transfer of sequential information. It states that such information cannot be transferred from protein to either protein or nucleic acid. The irreversible flow of information is from DNA to RNA to protein; DNA is transcribed into messenger RNA (mRNA) and subsequently translated into protein. However, in recent years it has become clear that additional genetic information exists in the human genome. Non-protein coding RNA (ncRNA) refers to mRNA that is transcribed from DNA but is not translated into protein. These sequences, once thought of as “junk DNA” – portions of the DNA sequence of the genome that don’t have a function – are being found to have crucial roles in human development, physiology and disease. Indeed, recent studies suggest that there are thousands of ncRNAs in the human genome [1-2].

Non-coding RNAs include a class of molecules called microRNAs (miRNAs or miRs). MicroRNAs are highly expressed in normal tissues and are being found to have critical roles in gene regulatory processes during cellular development and differentiation. MicroRNAs are small ncRNAs ~21-nucleotides long that regulate gene expression at the post-transcriptional level. MicroRNAs function by binding target mRNA molecules and either inhibiting translation into protein or targeting them for degradation. Abnormal microRNA expression has been linked to many human diseases, including schizophrenia, autism and cancer.

Tackling Heart Disease Together or Alone: The Behavioural Science of Self-Management

June 24, 2009 | by
ResearchBlogging.org

Heart disease is the leading killer in the U.S. and throughout most of Europe. People’s behaviour can protect and reduce risk of heart disease, and interventions to help people “self-manage” exist. But what is the best way to “self-manage”? A recent study shows that group programmes and self-directed programmes have remarkably different effects [1].

heart-disease

Self-management interventions exist for many health problems. They are notoriously difficult to define. One thorough definition is that it relates to activities undertaken by the person who has a “chronic” or “long-term” condition such as asthma, multiple sclerosis or arthritis. These activities include problem solving, decision making, resource utilization, the formation of a patient-provider partnership, action planning and self tailoring [2]. Interventions or programmes are designed around these activities to help support people to manage their own illness. The idea is that following attendance at a programme of some sort, the activities and skills learned will be continued to be used, thus improving health, maintaining fitness and/or quality of life and reducing the risk of future acute episodes of ill health. These interventions are popular for many reasons, including the relatively low cost to health service providers as interventions can be delivered by health-care professionals or by people with the relevant condition who have been trained, or a mixture of both. Self-management interventions also allow people with long-term conditions to be meet in a group with people with similar conditions. The experience of being in a group, knowing one is not alone and sharing stories is thought to play some part in the effectiveness of self-management interventions. But to what extent is this true?

Health Highlights – June 18th, 2009

June 18, 2009 | by

Health Highlights is a biweekly summary of particularly interesting articles from credible sources of health and medical information that we follow & read. For a complete list of recommeded sources, see our links page.

Health Highlights

Recovery Act Drives Record Number of NIH Grant Applications

June 10, 2009 | by

The American Recovery and Reinvestment Act of 2009 (Recovery Act) was signed into law by President Obama on February 17th, 2009. It included significant support for biomedical research. As part of the Recovery Act, the National Institutes of Health (NIH) designated at least $200 million for a new initiative in fiscal year 2009 – 2010 called the NIH Challenge Grants in Health and Science Research (RC1). The initiative is designed to fund approximately 200 grants. Earlier this week, Secretary of Health and Human Services Kathleen Sebelius announced that the NIH has received approximately 20,000 Challenge Grant applications through the Recovery Act [1].

scientists-under-the-microscope

By way of comparison, the Center for Scientific Review (CSR) reviewed 27,360 Research Project Grants (R01s) and 9,483 Exploratory/Developmental Research Grants (R21s) for the entire year of 2008 [2]. Over the next few months, the CSR will check the submitted Challenge Grant applications for compliance and then review them in a two-phase process. Reviewers with expertise in the specific Challenge Areas (listed below) will do the first phase reviews, followed by a study section comprised of researchers who will focus on each application’s overall significance and impact. The earliest anticipated start date for those grants funded is September 30th, 2009.

Health 2.0 Highlights: June 6th, 2009

June 6, 2009 | by