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Tag: "hormone" at biology news

Gene controlling circadian rhythms linked to drug addiction

...including sleep and wakefulness, body temperature, hormone levels, blood pressure and heart activity, it may also be a key regulator of the brain's reward system. UT Southwestern researchers showed that, in mice, the Clock gene regulates the reward response to cocaine, suggesting that similar actions take p...

Temperature regulates circadian clock in zebrafish

...logical and behavioral processes, from fluctuating hormone levels to sleep-wake cycles and feeding patterns. While it's well known that circadian clock elements sense and respond to light cycles, much less is known about how daily temperature cycles affect the clock's timing mechanism in vertebrates. In the...

Rodent social behavior encoded in junk DNA

...as mere junk DNA ?in the gene that codes for a key hormone receptor determined male-female relations and pare...e distribution of brain receptors that bind to the hormone vasopressin differed dramatically between monogamous and polygamous vole species and accounted for t...

Hormones and growth: The control of body size and developmental growth rate in fruit flies

...s, it was previously found that the release of the hormone ecdysone from an endocrine organ called the prothoracic gland triggers larval molting and, ultimately, metamorphosis. Thus, researchers have speculated that the timing of ecdysone release is critical in determining both the final body size and develo...

Clear rules needed to govern deep sea bioprospecting: UNU

...d one is used as an anti-irritant in cosmetics. A hormone extracted from salmon has been found effective in preventing osteoporosis while a salmon-derived sulfate is an antidote to the anticoagulant heparin. Sponges are particularly targeted as potential sources of pharmaceutical products. One of the most ...

A Father’s Day Gift: Free DNA Paternity Testing

...d one is used as an anti-irritant in cosmetics. A hormone extracted from salmon has been found effective in preventing osteoporosis while a salmon-derived sulfate is an antidote to the anticoagulant heparin. Sponges are particularly targeted as potential sources of pharmaceutical products. One of the most ...

Newly Discovered Role for Heart Response Enzyme May Yield Better Heart Failure Therapy

...in the cell membrane and that are activated by the hormone adrenaline to enhance the heart's pumping action in response to exercise or stress. In heart failure patients, chronic stress leads to an excess of adrenaline, over-stimulating beta-adrenergic receptors, a process that results in receptor desensitiz...

Weight control protein may yield antiobesity drugs

...out the body, keeps the brain sensitive to the fat hormone leptin, found researchers from the University of M...Medical School. Produced by fat tissue, the leptin hormone sends signals to the brain about the body's fat content. That signal, in turn, elicits adjustments i...

Gene for immune deficiency syndromes found

...fecting the thyroid gland and resulting in thyroid hormone insufficiency. Finally, people with CVID are susceptible to B-cell lymphomas. The researchers, led by Raif Geha, MD, and Emanuela Castigli, PhD, in the Division of Immunology at Children's Hospital Boston, found mutations in a gene known as TACI in ...

Protein amplification in melanoma is possible drug target

...fecting the thyroid gland and resulting in thyroid hormone insufficiency. Finally, people with CVID are susceptible to B-cell lymphomas. The researchers, led by Raif Geha, MD, and Emanuela Castigli, PhD, in the Division of Immunology at Children's Hospital Boston, found mutations in a gene known as TACI in ...

Suppressing growth hormone in early adulthood may prevent cancer

A modest suppression of growth hormone and related compounds beginning in early adulthood...rine Society, in San Diego. Suppression of growth hormone and insulin-like growth factor (IGF-1) also may decrease cancer risk in those individuals at high ri...

Scientists find a maturity gene in fly

...ds for Drosophila (the genus name for fruit flies) hormone receptor 4. The DHR4 gene carries inherited instru...ells to make the DHR4 protein, which is a "nuclear hormone receptor." Hormones like estrogen and testosterone attach to these receptors, which in turn attach t...

MWG Biotech expands siMAX?siRNA portfolio with new scales, lengths and design tools

...ds for Drosophila (the genus name for fruit flies) hormone receptor 4. The DHR4 gene carries inherited instru...ells to make the DHR4 protein, which is a "nuclear hormone receptor." Hormones like estrogen and testosterone attach to these receptors, which in turn attach t...

Scientists discover genetic pathway responsible for breast cancer cell growth

...t will advance our understanding of how the female hormone estrogen causes growth of breast cancer cells. The...fying a large number of genes that respond to this hormone in a single experiment. "This technology, first developed for the study of yeast, now offers the opp...

Neurotransmitters signal aggressive cancer, offer potential for early diagnosis

...ated neurotransmitter and the other a plant growth hormone with an unknown function in animals. Furthermore, the researchers found that the tumors made GABA using a different set of biochemical reactions than normal. Key enzymes involved in the production of these compounds were switched on in poor prognosis...

Anti-cancer Compound In Beer Gaining Interest

...ything from preventing prostate or colon cancer to hormone replacement therapy for women. "Xanthohumol is one of the more significant compounds for cancer chemoprevention that we have studied," said Fred Stevens, a researcher with OSU's Linus Pauling Institute and an assistant professor of medicinal chemist...

Research Permits First-Ever Visualization of Psychological Stress in the Human Brain

...- and measured the corresponding changes in stress hormone and heart rate. Many subjects described themselves as being "flustered, distracted, rushed and upset" by the stress task. The results showed increased cerebral blood-flow during the "stress test" in the right anterior portion of the brain (prefronta...

Plant gene related to cancer treatment may foster new oncology drugs

...g resistant proteins in humans move a plant growth hormone into cells, said Purdue plant cell biologist Angus...eins apparently move molecules of the plant growth hormone auxin through cell walls. In humans, related proteins rid cells of toxins such as cancer drugs. "Th...

Nanoparticles, nanoshells, nanotubes: How tiny specks may provide powerful tools against cancer

...re and the shell. A nanoparticle combined with a hormone and cell-killing peptide is being tested to image,...tage of the abundance of receptors for luteinizing hormone releasing hormone (LHRH) on breast cancer cell surfaces and created a molecular complex, combining L...

Max Planck researchers make a breakthrough in plant stem cell research

...a feedback mechanism, involving a growth-enhancing hormone and a regulatory protein, which controls the numbe... feedback loop, by which the growth-inducing plant hormone cytokinin limits its own influence. The study shows that the ARR genes play a direct role in regulat...

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