Tag: "estrogens" at biology news

OHSU-VAMC study sheds light on estrogen's benefit for MS

...OHSU's MS Center of Oregon, says understanding how estrogens boost protective T cells to fight MS will lead to ...ave made a major breakthrough in understanding how estrogens help MS," Bourdette said. "This breakthrough will provide a critical 'tool' for developing these new...

Gene duplication allowed pigs to have more babies

...formation of androgens, such as testosterone, into estrogens - whereas other hooved animals have only one. The evidence that they collected suggests that the additional aromatase genes arose as a result of natural selection for pigs with larger litters than their ancestors. These larger litters may well have...

Animal research suggests plant estrogens in soy do not increase breast cancer risk

...eys suggests that a diet high in the natural plant estrogens found in soy does not increase the risk of breast ...is convincing evidence that at dietary levels, the estrogens found in soy do not stimulate cell growth and other markers for cancer risk," said Charles E. Wood, ...

Moderate alcohol consumption increases plasma levels of a protective hormone

...king can increase DHEAS," he added. "Estradiol, or estrogens in general," Hendriks continued, "may be pivotal in the protection from coronary heart disease in premenopausal women. An association between moderate alcohol consumption and breast cancer has been proposed, which may be mediated through an increase...

Soy processing influences estrogen-dependent breast cancer growth in mice

.... Soy isoflavone products are marketed as dietary estrogens to women over age 50 as a natural alternative to hormone replacement therapy (HRT), but this is the age group in which most breast cancers occur. Seventy-five percent of breast cancer cases are diagnosed in women over 50, and the majority of these ...

Exercise reduces blood estrogens, risk for breast cancer in post menopausal women

...xercise per week significantly reduced circulating estrogens in postmenopausal women, according to a new study ...ive-day per week exercise program, serum levels of estrogens dipped significantly in the more active postmenopausal women. After 12 months of routine exercise, w...

SMCM professor discovers cattle hormones that leak into streams and alter fish reproduction

...d potent mix of androgens (male sex hormones), and estrogens (female hormones). According to the study, published in the online version of the scientific journal Environmental Health Perspectives, the male fish had one-third less testosterone and their testes were about half as big as those of unexposed fish ...

Estrogen found as link between obesity and breast cancer in postmenopausal women

...n postmenopausal women by increasing the amount of estrogens in the blood. High levels of estrogen definitivel... also is higher in women who have higher levels of estrogens in their blood," said Dorgan. "Our results suggest that obesity increases breast cancer risk in pos...

Researchers one step closer to Holy Grail of neurobiology

...damental arousal mechanisms," says Pfaff. "Because estrogens strongly drive female sex behaviors, we were interested in determining if the genes encoding the estrogen receptors alpha and beta could be involved in a more global brain function." The experiments were set up to study female mice sleeping in their ...

Estrogens as antioxidants reducing heart disease in younger postmenopausal women

...he journal Lipids in Health and Disease shows that estrogens commonly used in HRT reduce the build up of harmfu...part of the University of Toronto, have shown that estrogens can act as antioxidants, which neutralise free radicals, and hence protect HDL from oxidation. In a...

Grape seed extract may be useful supplement to blunt hypertension in postmenopausal women

...out the same extent as treatment with either plant estrogens or 17-estradiol. This suggests that mechanisms ot...iologists from Alabama previously found that plant estrogens from soy reduce salt-sensitive hypertension in young, estrogen-depleted spontaneously hypertensive r...

Popular weed killer feminizes native leopard frogs across Midwest

... or estrogens. The lowered androgens and increased estrogens allow egg cells to grow within the testes, which is normally impossible. Atrazine's effects on aromatase have been demonstrated in fish, reptiles and mammals, but not yet in amphibians. Atrazine is so widespread that it can be found far from agricult...

Walleye fishery threatened; Puerto Rico aquaculture, calling ALVIN on ocean bottom

...lls, feed lots or industrial waste. Environmental estrogens can come from the natural hormone estrogen (found in animals, including humans), or from synthetic hormones like those found in birth control pills and industrial products such as detergents, packaging plastics and insecticides. Many questions still...

Study: Isoflavone-enriched soy proteins fail to increase bone mineral density in young women

...uch as genistein are structurally similar to human estrogens and for that reason have some estrogen-like proper... without the negative impact, such as cancer, that estrogens are believed to have on reproductive organs in some women. The value of estrogens remains in dispute...

Maternal alcohol use during pregnancy may increase offsprings breast cancer risk

...turn them malignant. Since alcohol increases both estrogens in the blood as well as breast cancer risk, researchers at Georgetown University Medical Center wondered whether alcohol exposure in utero through a pregnant mother affects breast cancer risk. "Women should continue to heed warnings that alcohol int...

Diet rich in soy protein lowers estrogens associated with breast cancer

...ed foods significantly lowers levels of a class of estrogens normally associated with breast cancer risk in postmenopausal women, according to a new study published in the September issue of the American Association for Cancer Research (AACR) journal, Cancer Epidemiology, Biomarkers & Prevention. The study fou...

Sex genes of fish disrupted by common household products

...ia. Historically scientists have suspected actual estrogens or chemicals that mimic estrogens in pollution as the causes of the gender bending effects on fish. Estrogen (or estrogen-like) molecu...

CIIT research on estrogens featured at national meeting

...ually. While the study suggests that plant-based estrogens can alter the effects of synthetic compounds such as pesticides, the exposures studied were at dose levels unlikely to be encountered by people. The study is part of an effort to develop toxicogenomic methods for understanding how estrogen-like subst...

Popular weed killer demasculinizes frogs, disrupts their sexual development

...erfere with voice box development, while increased estrogens would promote ovaries within the testes. More than 60 million pounds of the herbicide were applied last year in the United States alone. Manufacturer Syngenta estimates that farmers use the herbicide to control weeds on about two-thirds of all U.S. c...

UPCI presents study on estrogenic activity of medicinal botanicals

...ay want to avoid their use for conditions in which estrogens are contraindicated. Of the extracts studied, motherwort leaf, saw palmetto berry, rhodiola rosea root and red clover blossom were the most potent in terms of their estrogenic activity, and extracts of maca root, cramp bark and tumeric root were the ...

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