الخميس، 24 يوليو 2014

ScienceDaily: Health & Medicine News

ScienceDaily: Health & Medicine News

Combination antiretroviral therapy helps treat HCV in patients co-infected with HIV

Posted: 23 Jul 2014 11:17 AM PDT

Treatment of HIV patients co-infected with the hepatitis C virus (HCV) with an anti-retroviral drug therapy not only tackles HIV, but also reduces HCV replication, according to a new study.

Age of puberty in girls influenced by which parent 'imprinted' genes are inherited from

Posted: 23 Jul 2014 10:14 AM PDT

The age at which girls reach sexual maturity is influenced by 'imprinted' genes, a small sub-set of genes whose activity differs depending on which parent passes on that gene, according to new research.

Genetics of cancer: Non-coding DNA can finally be decoded

Posted: 23 Jul 2014 10:14 AM PDT

Cancer is a disease of the genome resulting from a combination of genetic modifications, or mutations. We inherit from our parents strong or weak predispositions to developing certain kinds of cancer; in addition, we also accumulate new mutations in our cells throughout our lifetime. Although the genetic origins of cancers have been studied for a long time, researchers were not able to measure the role of non-coding regions of the genome until now.

How stress hormones promote brain's building of negative memories

Posted: 23 Jul 2014 10:12 AM PDT

Scientists have discovered a key component to better understanding how traumatic memories may be strengthened in women. Their study's findings suggest that developing clinical treatments that could lower norepinephrine levels immediately following a traumatic event might offer a way to prevent this memory-enhancing mechanism from occurring.

Physicians seeing increase in brown recluse spider bites

Posted: 23 Jul 2014 10:12 AM PDT

Medical toxicologists are reporting an increase in patients seen with brown recluse spider bites this summer. There are two components to spider bites -- the cutaneous lesion and, more rarely, the systemic symptoms that can occur following the bite.

Strategy proposed for preventing diseases of aging

Posted: 23 Jul 2014 10:12 AM PDT

Researchers argue that medicine focuses too much on fighting diseases individually instead of concentrating on interventions that prevent multiple chronic diseases and extend healthy lifespan. They call for moving forward with strategies that have been shown to delay aging in animals. In addition to promoting a healthy diet and regular exercise, these strategies include manipulating molecular pathways that slow aging and promote healthy longevity.

Ancient genetic material from caries bacterium obtained for the first time

Posted: 23 Jul 2014 08:04 AM PDT

Streptococcus mutans, one of the principal bacteria that cause dental caries, has increased the change in its genetic material over time, possibly coinciding with dietary change linked to the expansion of humanity.

Life expectancy gains threatened as more older Americans suffer from multiple medical conditions

Posted: 23 Jul 2014 07:59 AM PDT

With nearly four in five older Americans living with multiple chronic medical conditions, a new study finds that the more ailments you have after retirement age, the shorter your life expectancy. The analysis, one of the first to examine the burden of multiple chronic conditions on life expectancy among the elderly, may help explain why increases in life expectancy among older Americans are slowing.

Presence of uterine cancers at time of hysterectomy studied using morcellation

Posted: 22 Jul 2014 01:43 PM PDT

Among women undergoing a minimally invasive hysterectomy using electric power morcellation, uterine cancers were present in 27 per 10,000 women at the time of the procedure, according to a study. There has been concern that this procedure, in which the uterus is fragmented into smaller pieces, may result in the spread of undetected malignancies.

New knee implant saves the ligaments

Posted: 22 Jul 2014 01:41 PM PDT

A new total knee replacement that saves all of the ligaments can make a person's knee feel and move just like the original. During a traditional total knee replacement, the surgeon must remove the "island" of bone to which the anterior cruciate ligament (ACL) and the posterior cruciate ligament (PCL) are attached. The new knee features a shape that protects that island of bone and saves the ligaments.

Gene variant identified as heart disease risk factor for women

Posted: 22 Jul 2014 12:25 PM PDT

A genetic basis has been identified for heart disease in women. This new information helps to identify which women are more prone to heart disease, researchers report. The gene, when functioning normally, is activated in part by the hormone estrogen and has been previously shown to relax the blood vessels, and in turn, lower blood pressure.

Forty-five percent rise in diagnostic imaging tests by GPs in Australia

Posted: 22 Jul 2014 12:25 PM PDT

A 45 percent rise in diagnostic imaging tests ordered by Australian GPs is being driven by increasing GP visits, a rising number of problems managed at consultations and a higher likelihood that GPs order imaging tests for these problems, according to a new study says. Based on a long term national survey of 9,802 GPs between 2002 and 2012, the report draws on data from more than 980,000 GP-patient encounter records to assess the extent to which GP's order tests in line with diagnostic imaging guidelines.

Distinctive developmental origin for a drainage tube in the eye

Posted: 22 Jul 2014 11:25 AM PDT

Scientists have conducted a comprehensive exploration of an eye structure known as Schlemm's canal: a key gatekeeper for the proper flow of eye fluid, presenting a number of insights relevant to glaucoma and other diseases.

Pathogenic connection between autoimmune disorders, cancer found

Posted: 22 Jul 2014 11:24 AM PDT

Autoimmune disorders may share certain pathogenic mechanisms with cancer, according to a new report. "This study opens a new therapeutic approach for myasthenia gravis, as well as other autoimmune disorders," said one researcher. "Conventional therapies may improve the disease, but have numerous complications. This discovery may lead to a viable treatment option for the millions of American suffering from these disorders."

Clients of violence interventional advocacy program find experience supportive

Posted: 22 Jul 2014 10:07 AM PDT

Participants who received care through a Violence Intervention Advocacy Program -- an interventional program targeting the physical, mental, emotional and social needs of violently injured youths -- were less likely to retaliate for their injuries and experienced life changing behaviors through connections to caring, steady, supportive adults who helped them feel trust and hope, researchers report.

Why do challenging tasks make consumers believe drugs wear off faster?

Posted: 22 Jul 2014 09:57 AM PDT

Imagine that you have a cup of coffee and sit down to read People magazine. How long do you think the energy boost will last before you reach for another cup? Would you need more caffeine if you tried to read War and Peace? A new study finds that consumers wrongly believe that pharmacological products such as coffee and aspirin lose their effectiveness when they engage in more strenuous activities.
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