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H2S plays critical role in signaling pathway linked to Alzheimer's and Parkinson's

Something rotten never smelled so sweet. This is what members of a team of scientists at Cold Spring Harbor Laboratory (CSHL) are telling one another as they discuss a new finding they did not expect to make. They have discovered that hydrogen sulfide (H2S) - the flammable, highly toxic gas that we usually associate with the smell of rotten eggs in landfills and sewers - plays an important role in the regulation of a signaling pathway implicated in biological malfunctions linked to Alzheimer's and Parkinson's diseases, among others.

14 Dec 2011

Fresh cells can pep talk immune cells exhausted by HIV or hepatitis C

Chronic infections by viruses such as HIV or hepatitis C eventually take hold because they wear the immune system out, a phenomenon immunologists describe as exhaustion.

14 Dec 2011

Chemical disruption to key interaction shown to limit metastasis in test mice

Finding ways to counteract or disrupt the invasive nature of cancer cells, called "metastasis," has been a long-term goal of cancer researchers. Now, researchers at Moffitt Cancer Center in Tampa, Fla., have identified an interactive pathway that regulates metastases in some cancers that may be vulnerable to chemical targeting in order to prevent cancer cell proliferation and tumor growth.

14 Dec 2011

Hydrogel regenerates healthy, scar-free tissue on skin damaged by severe burns

Johns Hopkins researchers have developed a jelly-like material and wound treatment method that, in early experiments on skin damaged by severe burns, appeared to regenerate healthy, scar-free tissue.

14 Dec 2011

Potential nanoparticle treatment for macular degeneration and retinitis pigmentosa

Hitching a ride into the retina on nanoparticles called dendrimers offers a new way to treat age-related macular degeneration and retinitis pigmentosa. A collaborative research study among investigators at Wayne State University, the Mayo Clinic and Johns Hopkins Medicine shows that steroids attached to the dendrimers targeted the damage-causing cells associated with neuroinflammation, leaving the rest of the eye unaffected and preserving vision.

14 Dec 2011

Acetylcholine can weaken synaptic connections between neurons in brain

Researchers from the University of Bristol have discovered that a chemical compound in the brain can weaken the synaptic connections between neurons in a region of the brain important for the formation of long-term memories.

14 Dec 2011

Researchers discover how statins promote breakdown of plaque in arteries

In a new study, NYU Langone Medical Center researchers have discovered how cholesterol-lowering drugs called statins promote the breakdown of plaque in the arteries. The study was published online by the journal PLoS One on December 6, 2011.

14 Dec 2011

Link between high tau levels and worse outcome after head trauma

High levels of tau protein in fluid bathing the brain are linked to poor recovery after head trauma, according to a study from Washington University School of Medicine in St. Louis and the Fondazione IRCCS Ca Granda-Ospedale Maggiore Policlinico in Milan, Italy.

14 Dec 2011

Researchers uncover important source of inflammation for CKD

UC Irvine researchers have uncovered an important source of inflammation seen in people with chronic kidney disease, which is increasingly common due to the epidemic of obesity-related diabetes and hypertension.

14 Dec 2011

Macrophages play a role in brown fat metabolism

Throughout the interior spaces of humans and other warm-blooded creatures is a special type of tissue known as brown fat, which may hold the secret to diets and weight-loss programs of the future.

14 Dec 2011

Scientists shed light on 3-D structure of olfactory receptor binding site

Banana, mango or apricot - telling these smells apart is no problem for the human nose. How the olfactory organ distinguishes such similar smells has been uncovered by an interdisciplinary team of researchers at the RUB. The scientists were the first to shed light on the dynamics of the three-dimensional structure of the binding site of an olfactory receptor. In so doing, they also found a characteristic pattern of hydrogen bonds between odorant and receptor, which accounts for the specificity of the olfactory sensors.

14 Dec 2011

New study: Insulin signaling is altered in human pancreas

Insulin signaling is altered in the pancreas, a new study shows for the first time in humans. The errant signals disrupt both the number and quality of beta cells - the cells that produce insulin.

14 Dec 2011

GW scientist to identify molecular mechanisms that define embryonic OE stem cells

Anthony-Samuel LaMantia, PhD, professor in the Department of Pharmacology and Physiology and Director of the GW Institute for Neuroscience in the School of Medicine and Health Sciences has been awarded a grant from the National Institutes of Health to identify molecular mechanisms that define embryonic olfactory epithelium (OE) stem cells.

14 Dec 2011

Researchers create vaccine that reduces tumors in mice

Researchers at Mayo Clinic in Arizona and the University of Georgia (UGA) have developed a vaccine that dramatically reduces tumors in a mouse model that mimics 90 percent of human breast and pancreatic cancer cases - including those that are resistant to common treatments.

14 Dec 2011

Researchers convert astrocytes directly into dopamine-producing neurons

In efforts to find new treatments for Parkinson's Disease (PD), researchers from the Perelman School of Medicine at the University of Pennsylvania have directly reprogrammed astrocytes, the most plentiful cell type in the central nervous system, into dopamine-producing neurons.

14 Dec 2011

Study reveals key role of melatonin receptor in sleep regulation

A team from the Research Institute of the McGill University Health Centre (RI-MUHC) and McGill University has made a major breakthrough by unraveling the inner workings of melatonin, also known as the "sleep hormone."

14 Dec 2011

New substance can replace nucleoside thymidine in DNA biosynthesis

Interactions of biological macromolecules are the central bases of living systems. Biological macromolecules are synthesized in living cells by linking many small molecules together. Naturally occurring macromolecules include genetic materials (DNA) and proteins. A detailed understanding of the synthesis of these macromolecules in whole animals is a basic requirement for understanding biological systems, and for the development of new therapeutic strategies.

14 Dec 2011

Aethlon Hemopurifier can capture Nef protein exosomes linked with HIV

Aethlon Medical, Inc., the pioneer in developing therapeutic filtration devices to address infectious disease and cancer, announced today that researchers have discovered that the Aethlon Hemopurifier is able to capture particles known as Nef protein exosomes, which contribute to the progression of human immunodeficiency virus (HIV) infection to acquired immunodeficiency syndrome.

14 Dec 2011

Researchers identify interactive pathway that regulates cancer metastasis

14 Dec 2011

People with myotonic muscular dystrophy more likely to develop cancer

People who have the most common type of adult muscular dystrophy also have a higher risk of getting cancer, according to a paper published today in the Journal of the American Medical Association.

14 Dec 2011