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Lab study shows THC exposure as adolescents linked to negative effects of THC as adults

In earlier studies, researchers at Louisiana State University had found that estrogen - or more precisely, having ovaries - made adult rats exposed for the first time to THC, the primary ingredient in marijuana and hashish, less sensitive to THC's negative effects on tests of learning and memory.

20 Apr 2009

Keeping fit good for the environment

Maintaining a healthy body weight is good news for the environment, according to a study which appears today in the International Journal of Epidemiology.

20 Apr 2009

Key genetic mechanism a potential key to new class of antibiotics

Researchers have determined the structure of a key genetic mechanism at work in bacteria, including some that are deadly to humans, in an important step toward the design of a new class of antibiotics, according to an accelerated publication that appeared online today as a "paper of the week" in the Journal of Biological Chemistry.

20 Apr 2009

Early isolation linked to enhanced response to cocaine

Drug addiction affects millions of people around the world, causing numerous problems ranging from emotional and psychological difficulties to physical and health issues.

20 Apr 2009

Treatment with biphosphonates may prevent radiation-induced leukemia

Treatment with biphosphonates could prevent radiation-induced leukemia, according to data presented at the American Association for Cancer Research 100th Annual Meeting 2009.

20 Apr 2009

Could senna improve the quality of colonoscopy preparation with magnesium citrate?

Inadequate cleansing of the colon has an adverse effect on procedure time, safety, completion rate and diagnostic accuracy.

20 Apr 2009

Coffee, caffeine and amyotrophic lateral sclerosis

Amyotrophic lateral sclerosis (ALS) is a fatal disease that damages key neurons in the brain and spinal cord.

20 Apr 2009

Brain metastases hijack neuron-supporting cells to resist chemotherapy

Cancer that spreads to other organs finds a particularly inviting hideout in the brain, where these metastases are usually far harder to treat than they are in other locations.

20 Apr 2009

Computational model examines the pathways of Alzheimer's that strikes at the young

Alzheimer's disease (AD) is a tragic disease that robs an individual of their memory and mental capacity.

20 Apr 2009

Thymoquinone inhibits the development of pancreatic cancer

An herb recently found to kill pancreatic cancer cells also appears to inhibit development of pancreatic cancer as a result of its anti-inflammatory properties, according to researchers from the Kimmel Cancer Center at Jefferson.

20 Apr 2009

Addition of dasatinib to standard chemo cocktail may enhance effect in certain ovarian cancers

The addition of a chemotherapeutic drug for leukemia to a standard regimen of two other chemotherapy drugs appears to enhance the response of certain ovarian cancers to treatment, according to a pre-clinical study led by researchers in the Duke Comprehensive Cancer Center.

20 Apr 2009

A potential therapeutic target for gastric cancer

Gastric cancer (GC) is the fourth most common malignancy and the second most frequent cause of cancer-related death in the world.

20 Apr 2009

Novel method of isolating high quality RNA from Kupffer cells

Kupffer cells, resident tissue macrophages that line the liver sinusoids, play a key role in modulating inflammation in a number of experimental models of liver injury.

20 Apr 2009

Cooked tomatoes may be healthier than raw ones

According to scientists in New Zealand, eating a raw tomato may not be the best way to access it s healthy antioxidants - they say a mere 4% of the antioxidant lycopene is released from raw tomatoes.

20 Apr 2009

Jet lag disrupts sleep by throwing two neural centers out of sync

New research by scientists in the U.S. has revealed that the disrupted sleep which results from jet lag and shift work occurs in two separate but linked groups of neurons below the hypothalamus at the base of the brain.

19 Apr 2009

Scientists uncover secrets of salmonella's stealth attack

A single crafty protein allows the deadly bacterium Salmonella enterica to both invade cells lining the intestine and hijack cellular functions to avoid destruction, Yale researchers report in the April 17 issue of the journal Cell.

16 Apr 2009

When every photon counts: unusual cell nuclei help nocturnal animals see better

The eyes of nocturnal mammals have very large numbers of highly-sensitive rod photoreceptors (the cell type responsible for night vision).

16 Apr 2009

Move over, Y chromosome - it's time X got some attention

In the first evolutionary study of the chromosome associated with being female, University of California, Berkeley, biologist Doris Bachtrog and her colleagues show that the history of the X chromosome is every bit as interesting as the much-studied, male-determining Y chromosome, and offers important clues to the origins and benefits of sexual reproduction.

16 Apr 2009

Survival mode that protects cells when oxygen is low also slows aging

A biochemical pathway that helps keep cells alive when oxygen is low also plays a role in longevity and resistance against some diseases of old age, according to a report to be published April 16 in the journal Science.

16 Apr 2009

Disruption of copper regulation key to prion diseases

An investigation of a rare, inherited form of Creutzfeldt-Jakob disease suggests that disrupted regulation of copper ions in the brain may be a key factor in this and other prion diseases.

16 Apr 2009