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Fluoride has dramatic effects on bacteria inside the mouth

Regular use of fluoride-containing toothpaste and mouthwash has long been known to strengthen the enamel on teeth. But new research by Howard Hughes Medical Institute (HHMI) scientists finds that fluoride also has dramatic effects on bacteria inside the mouth -- including those that form plaque and can cause cavities.

23 Dec 2011

Study identifies six risk factors associated with blindness after spine surgery

A study published in the January 2012 issue of Anesthesiology identified six risk factors associated with blindness or partial blindness that can occur after major spine surgery: 1) male sex, 2) obesity, 3) use of a surgical frame that places the head lower than the heart, 4) length of the surgery, 5) amount of blood loss and 6) use of certain fluids that replace lost blood.

22 Dec 2011

Scientists identify why African naked mole-rat feels no pain when exposed to acid

British researchers of the Max Delbr-ck Center for Molecular Medicine (MDC) Berlin-Buch have found out why the African naked mole-rat (Heterocephalus glaber), one of the world's most unusual mammals, feels no pain when exposed to acid.

21 Dec 2011

Zalicus commences Z944 Phase 1 clinical trial for treatment of acute and inflammatory pain

Zalicus Inc. a biopharmaceutical company that discovers and develops novel treatments for patients suffering from pain and immuno-inflammatory diseases, today announced the initiation of a Phase 1 clinical trial evaluating the pharmacokinetics and safety of Z944, a novel oral T-type calcium channel blocker with demonstrated preclinical potential for the treatment of acute and inflammatory pain.

19 Dec 2011

Engineers describe novel method that collates trace heavy metals in water

An unfortunate consequence of many industrial and manufacturing practices, from textile factories to metalworking operations, is the release of heavy metals in waterways. Those metals can remain for decades, even centuries, in low but still dangerous concentrations.

17 Dec 2011

State roundup: Florida awaits Medicaid waiver news

Now, nurses regularly do everything from give insulin shots to empty urinary catheter bags. At the same time, state budget cuts mean the number of school nurses in California is shrinking. As a result, nurses say, they are responsible for more students every year and are largely consumed with keeping "medically fragile" children in class.

16 Dec 2011

Matrix protein tenascin C regulates astrocyte development

How astrocytes, certain cells of the nervous system, are generated was largely unknown up to now. Bochum's researchers have now investigated what influence the cell environment, known as the extracellular matrix, has on this process.

13 Dec 2011

Cortex plays a key role in fear learning

The study, initiated by the Swiss researchers and published in Nature, constitutes ground-breaking work in exploring emotions in the brain.

12 Dec 2011

Increased sensitivity to low frequency vibration found in people with inherited hearing loss

People with a certain form of inherited hearing loss have increased sensitivity to low frequency vibration, according to a study by Professor Thomas Jentsch of the Leibniz-Institut f-r Molekulare Pharmakologie (FMP)/Max Delbr-ck Center for Molecular Medicine (MDC) Berlin-Buch and Professor Gary Lewin (MDC), conducted in cooperation with clinicians from Madrid, Spain and Nijmegen, the Netherlands.

9 Dec 2011

H. pylori bacterium produces urease to neutralize gastric acid

A research team led by scientists at the Chinese University of Hong Kong is releasing study results this week showing how a bacterium, Helicobacter pylori, that causes more than half of peptic ulcers worldwide and that has been implicated in stomach cancer has managed for eons to turn the acidic environment of the human gut into one in which it can thrive.

8 Dec 2011

TAU develops tumor destruction method that also creates immunity

Even when surgical tumor removal is combined with a heavy dose of chemotherapy or radiation, there's no guarantee that the cancer will not return. Now researchers at Tel Aviv University are strengthening the odds in favor of permanent tumor destruction - and an immunity to the cancer's return - with a new method of tumor removal.

7 Dec 2011

Zalicus commences Z160 Phase 1 clinical trial for pain

Zalicus Inc. a biopharmaceutical company that discovers and develops novel treatments for patients suffering from pain and immuno-inflammatory diseases today announced the initiation of a Phase 1 clinical trial evaluating the pharmacokinetics and safety of a new formulation of Z160 (formerly NMED-160), a novel oral N-type calcium channel blocker.

5 Dec 2011

Implantable replacement cartilages hold promise for damaged knees, shoulders, ears and noses

A lab discovery is a step toward implantable replacement cartilage, holding promise for knees, shoulders, ears and noses damaged by osteoarthritis, sports injuries and accidents.

3 Dec 2011

New insight into why aminoglycoside antibiotics cause deafness

Peter Steyger's research on hearing is very personal. That's because Steyger - a research scientist with the Oregon Hearing Research Center at Oregon Health & Science University - is deaf. Now Steyger has published groundbreaking research that is as personal as it gets. The study gives scientists new insight into why a specific class of antibiotics causes deafness - the same class of antibiotics that caused Steyger's deafness as a child in England 48 years ago. The study was published this month in Scientific Reports, part of the Nature Publishing Group.

2 Dec 2011

Study reveals no clear advantage of one implant type over another

More than 270,000 Americans get hip replacement surgeries every year -- a number that is projected to double in the next decade as the population ages. With various options for implants, including metal-on-polyethylene, metal-on-metal and ceramic-on-ceramic, there have been questions about which kind works best.

1 Dec 2011

Scientists create genetically-altered neurons that light up as they fire

In a scientific first that potentially could shed new light on how signals travel in the brain, how learning alters neural pathways, and might lead to speedier drug development, scientists at Harvard have created genetically-altered neurons that light up as they fire.

30 Nov 2011

Even normal salt intake can cause hypertension in people suffering from sodium dysregulation

Hypertension is an endemic condition with far-reaching consequences. For instance, high blood pressure is the main cause of heart attacks and strokes. Other organs are also damaged by the chronic condition.

25 Nov 2011

ABCC9 gene also influences duration of sleep in humans

A collaborative European study led by LMU researchers has shown that ABCC9, a known genetic factor in heart disease and diabetes, also influences the duration of sleep in humans.

24 Nov 2011

New device safe, more effective for patients with chronic neurological conditions

Functional electrical stimulation (FES) was developed to help return lost function to patients with upper and lower extremity injuries and spinal cord injuries, among other applications. However, the devices, which work by stimulating neuronal activity in nerve-damaged patients, have a potential shortcoming in that the electrical currents needed for the treatment to work can also send errant signals to surrounding nerves, resulting in painful side effects.

22 Nov 2011

Study reveals specific functional deficit in inner ear mechanotransduction channels

National Institutes of Health-funded researchers have identified two proteins that may be the key components of the long-sought after mechanotransduction channel in the inner ear-the place where the mechanical stimulation of sound waves is transformed into electrical signals that the brain recognizes as sound.

22 Nov 2011