Tag: "hormones" at biology news
Medicines, caffeine and antibacterial soap among contaminants found in American streams
...cardiac disorders and hypertension, and female sex hormones
used in birth control pills and hormone replacemen...count, the measured concentrations of reproductive hormones
may have implications for the health of aquatic organisms, according to Kolpin and his colleagues....
Scientists seek women who suffer from PMS
...nicians have known for a long time that female sex hormones
are associated in some way with PMS and the more serious premenstrual dysphoric disorder because neither occurs before puberty and both disappear after menopause, Girdler said. Paradoxically, women who have PMDD have completely normal ovarian functi...
Scientists meet to discuss latest in how sex matters
...current research ranging from the influence of sex hormones
on brain development to unlocking the mystery behi...University, will present her research showing that hormones
present during fetal development likely affect behavior. Females with congenital adrenal hyperplasia...
Alaskan waters growing hospitable to sharks while seals and sea lions decline
...Gallucci's group is trying to find ways to analyze hormones
from blood samples that might allow them to determine the age, sexual maturity and other information. Such life-history data can then be used to model shark dynamics. Unraveling the basic biology of the animals also may give scientists insight on how...
'Night eating syndrome' may be related to the performance of the body -- not the mind
.... Cortisol, melatonin, and leptin are regulatory hormones
with typical circadian rhythms that regulate various physiological and metabolic functions. Another main regulator is the hypothalamic-pituitaryadrenal (HPA) axis, which coordinates several biological functions. The circadian rhythms represent the b...
NIH panel outlines strategies for managing tumors of the adrenal glands
...renal tumor, known as a pheochromocytoma, releases hormones
that can cause dangerously high blood pressure. Another type, known as an adrenal cortical cancer, has a high mortality rate. The panel recommends surgically removing both types when technically possible, regardless of size. The panel members concu...
Tidying up transcription factors
... of certain genes. These signals include primarily hormones
(e.g., estrogens) and small proteins (e.g., growth hormone). Transcription factors are the mediators of these signals and ultimately govern which genes are expressed. Darnell and Brivanlou realized that by grouping transcription factors according to...
Differences between boys and girls show less than three weeks into pregnancy
...e development of the glands that produce the fetal hormones
means that the higher level must be due to the way...ses proteins in female pregnancies and not to male hormones
suppressing MSHCG, as has been suggested by other researchers. Genes that the researchers believe a...
Pain in the gut? Don't blame stomach acid
...onship between bacteria, pro-inflammatory factors, hormones
and acid secretion in the stomach. Results are published in the January 2002 issues of Gastroenterology and The American Journal of Physiology. Mice in the U-M studies contracted gastritis just like people do - from eating food or drinking water cont...
Alcohol consumption during pregnancy alters thyroid function
... general, fetal brain development requires thyroid hormones
to grow normally and build all the right connectio... alcohol given to a pregnant mother lowers thyroid hormones
in both the fetus and the mother. This finding gives investigators the rationale for doing addition...
Basis of rare genetic illness leads to better understanding of bone formation, Hopkins researchers find
...-alpha at normal levels allows cells to respond to hormones
by influencing which genes are turned on and off, as well as controlling the action of many proteins. A defect in GNAS1 prevents cells from responding to hormones. In POH's case, this leads to the synthesis of bone by affected cells. The research tea...
Lehigh scientists believe they have found link between DHEA and central nervous system
...mon, and, when needed, it converts DHEA into other hormones
such as testosterone and estrogen. The body's supply of DHEA peaks in the twenties and drops as much as 90 percent by the seventies. Simon stresses that he and his team are only beginning the search to determine the impact of DHEA. They will look f...
Hormonal regulation of glucose production by fat cells
...p30 extended this finding and showed that multiple hormones
secreted by adipocytes can profoundly alter energy metabolism in various tissues. Here, Combs and colleagues elucidate the primary metabolic effect of the latter hormone, also known as adiponectin. From earlier work, it appears that Acrp30 can sensit...
Ohio State scientists bake heart healthy soy bread
...lant-based chemicals that are used by the plant as hormones
to ward off pests such as insects. There is some evidence that isoflavones may mimic human estrogen. Tomatoes, on the other hand, contain substantial amounts of lycopene, which has been shown to help prevent prostate cancer. The question is, does c...
Oral administration of estrogen replacement therapy suppresses the biological actions of growth hormones in GH-deficient women
...with key hormonal deficiencies. Background Growth hormones
have recently been approved for replacement treatm...ed information regarding the interaction of growth hormones
with other hormones
during replacement therapy. Accordingly, observations in postmenopausal women ...
Illuminating how plants adapt to light
...The scientists also exposed seedlings to two plant hormones
known to affect light-sensitive pathways. By measuring the length of the embryonic shoot, or hypocotyl, in the plants, the scientists could quantify each plants sensitivity to light. Hypocotyls tend to extend longer in lower light -- as the plant del...
Seat of cellular bus system for protein passengers found by Dartmouth Medical School researchers
...e, paving the way for further understanding of how hormones
such as insulin as well as other important factors are conveyed through cells for secretion into the blood stream. The authors are Charles Barlowe, PhD, associate professor of biochemistry and William J. Belden, a graduate student. Transporting prot...
A fish named Wayne-Wanda?
...e fish. He believes that it is the female estrogen hormones
released from sewage treatment plants that are responsible for the feminization of wild fish....
Gene silencing produces disease resistance in plants
...grobacterium tumefaciens but would not produce the hormones
that lead to gall formation. "Usually when you try to prevent disease, you look at stopping the bacteria or other disease-causing agents at the 'front door' and preventing them from entering the plant," said Dandekar. "Here, we're doing the opposite....
Does the Pill affect libido by blunting a womans sense of smell?
...he particular nature of the monophasic pills whose hormones
are mainly progestative, which is similar to the natural clime of the luteal phase of the menstrual cycle," said Professor Salvatore Caruso of the Department of Gynaecological Science at the Ospedale S. Bambino in Catania. "Our data seem to show that...
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