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Scientists tweak gene to mimick heart-strengthening effects of endurance training in sedentary mice

By tweaking a single gene, scientists have mimicked in sedentary mice the heart-strengthening effects of two weeks of endurance training, according to a report from Dana-Farber Cancer Institute and Beth Israel Deaconess Medical Center (BIDMC).

24 Dec 2010

Sequestering GSK3 enzyme leads to stabilization of proteins in cells

The cell signaling pathway known as Wnt, commonly activated in cancers, causes internal membranes within a healthy cell to imprison an enzyme that is vital in degrading proteins, preventing the enzyme from doing its job and affecting the stability of many proteins within the cell, researchers at UCLA's Jonsson Comprehensive Cancer Center have found.

24 Dec 2010

Silencing of specific genes of germinal cell lines reduces brain tumors

Scientists at IRB Barcelona have discovered that some brain tumours in larvae of the fruit fly Drosophila melanogaster use the genetic programme of germline cells to grow. The removal of some of these genes leads to healthy brains. This finding demonstrates that these genes are crucial for tumour development. The study, headed by ICREA researcher Cayetano Gonz-lez, is published today in the prestigious journal Science.

24 Dec 2010

Paternal diet affects lipid metabolizing genes in offspring

Scientists at the University of Massachusetts Medical School and the University of Texas at Austin have uncovered evidence that environmental influences experienced by a father can be passed down to the next generation, "reprogramming" how genes function in offspring. A new study published this week in Cell shows that environmental cues-in this case, diet-influence genes in mammals from one generation to the next, evidence that until now has been sparse.

24 Dec 2010

Researchers study relationship between MITF, ATF2 in melanoma development

Melanoma is one of the least common types of skin cancer, but it is also the most deadly. Melanocytes (pigment-producing skin cells) lose the genetic regulatory mechanisms that normally limit their number, allowing them to divide and proliferate out of control. One such regulator, called MITF, controls an array of genes that influence melanocyte development, function and survival.

24 Dec 2010

Oxytocin makes individuals feel calmer and dampens effect on fear receptor in the brain

"My husband of thirty-five years passed away seven years ago, and I lost my daughter in a car accident last year, I honestly could no longer find the energy to smile or laugh," recounts sixty-year-old widow Opal Perry. "My son suggested I try a new hormone being touted to help with symptoms of depression, called oxytocin. After the second day I was driving and caught myself smiling in the mirror. I couldn't believe it. I had to do a double take. I hadn't really smiled in seven years! I thought I would never smile again until now."

23 Dec 2010

Brawn and stealth beat colorful and refined in evolutionary mating game

When prowling for a hook up, it's not always the good-looker who gets the girl. In fact, in a certain species of South American fish, brawn and stealth beat out colorful and refined almost every time.

23 Dec 2010

Scientists pinpoint brain site where leptin hormone may trigger onset of puberty

UT Southwestern Medical Center researchers have pinpointed a tiny site in the brain where the hormone leptin may help trigger the onset of puberty.

23 Dec 2010

Power, anthropomorphism, and risk perception

People who feel powerful are more likely to believe they can beat cancer if it's described in human terms, according to new study in the Journal of Consumer Research.

23 Dec 2010

When will runners and swimmers reach their physical limit?

Running and swimming records are broken again and again at almost every international athletics event. But, can human performance continue to improve indefinitely? Will runners continue to accelerate off the starting blocks and reach the finish line in faster and faster times? Will swimmers always be able to dive into the record books with a quicker kick?

23 Dec 2010

Most Australians don't approve of IVF or abortion for sex-selection

Most Australians do not approve of IVF or abortion for sex-selection purposes, and most do not think a hypothetical blue or pink pill to select the sex of a child should be legal, a new study has found.

23 Dec 2010

MCP-1 protein may contribute to failure of AV fistulas created for vascular access in dialysis patients

A protein implicated in the development of vascular diseases may also contribute to the failure of arteriovenous (AV) fistulas created for vascular access in dialysis patients, according to a study appearing in an upcoming issue of the Journal of the American Society of Nephrology (JASN).

23 Dec 2010

Past experiences subconsciously influence behavior: Researchers

Researchers at MIT's Picower Institute for Learning and Memory report for the first time how animals' knowledge obtained through past experiences can subconsciously influence their behavior in new situations.

23 Dec 2010

Catalogs of fruit fly and roundworm's functional genomic elements

Scientists today published catalogs of the fruit fly and roundworm's functional genomic elements: DNA sequences in the genome that carry the instructions and determine which genes are turned on and off at various times in different cells.

23 Dec 2010

Researchers discover recycling mechanism of signaling receptors

An international team of researchers led by Carnegie Mellon University's Manojkumar Puthenveedu has discovered the mechanism by which signaling receptors recycle, a critical piece in understanding signaling receptor function. Writing in the journal Cell, the team for the first time describes how a signaling receptor travels back to the cell membrane after it has been activated and internalized.

23 Dec 2010

Earlier diagnosis in Cowden syndrome patients predisposed to breast and kidney cancer

Researchers at Cleveland Clinic's Genomic Medicine Institute have revealed multiple genetic discoveries that may permit easier diagnosis and disease management for Cowden syndrome patients who are predisposed to breast and kidney cancer.

23 Dec 2010

Brain regions that 'fire up' due to suppression of automatic behaviour

Research from York University is revealing which regions in the brain "fire up" when we suppress an automatic behaviour such as the urge to look at other people as we enter an elevator.

23 Dec 2010

Arsenic agent for leukemia beneficial in treating medulloblastoma, Ewing's Sarcoma

Researchers at the Georgetown Lombardi Comprehensive Cancer Center, a part of Georgetown University Medical Center, have found that an arsenic-based agent already FDA-approved for a type of leukemia may be helpful in another hard-to-treat cancer, Ewing's Sarcoma (ES). The research, based on animal studies, also suggests the drug might be beneficial in treating medulloblastoma, a highly malignant pediatric brain cancer.

23 Dec 2010

Scientist discovers molecular switch controlling synthesis of ribosomes

A scientist from the Florida campus of The Scripps Research Institute has discovered a molecular switch that controls the synthesis of ribosomes. Ribosomes are the large machineries inside all living cells that produce proteins, the basic working units of any cell. These new findings offer a novel target for potential treatments for a range of diseases, including cancer.

23 Dec 2010

Key to long-term weight-loss success is finding unique individual level of carbohydrate tolerance

Recent media coverage suggests that the reported wedding diet of Carole Middleton, mother of future British princess Kate Middleton, is something brand new. Yet the Dukan Diet is just another variation of the Atkins Diet™, but with some nutritional recommendations that simply don't make sense or are guaranteed to fail.

23 Dec 2010