Tag: "testosterone" at biology news
No evidence that widely prescribed statins protect against prostate cancer
...ins may not have a clinically meaningful impact on testosterone
in the blood, although further studies should be d... found no relationship between statin use and free testosterone
and most of the other associated compounds. There was a significant association between statin use a...
Cardio exercise benefits in male vs. female hearts
...veral descriptions on the effects of estradiol and testosterone
(female and male hormones, respectively) on pathologic hypertrophy, but very little research has been conducted on the physiological remodeling of the heart. Methodology In this study, the researchers focused on chronic voluntary exercise, an im...
Testosterone replacement therapy: How safe for aging men?
... progesterone levels lost to aging. More recently, testosterone
(the most important male hormone) supplements have...In 2002, the number of elderly American men taking testosterone
replacement therapy was nearly 819,000, and the number is growing. The increased use has occurred de...
Female gender provides an advantage in renal diseases
...gen helped to protect against kidney disease while testosterone
proved to be detrimental to kidney health. More recently, Dr. Sharon Silbiger of the Department of Medicine/Division of Nephrology, Albert Einstein College of Medicine/Montefiore Medical Center, Bronx, NY and her colleagues examined the direct effe...
The 'female advantage' in kidney disease does not extend to diabetic women
...t kidney disease the absence of the hormone testosterone
contributes to a more rapid progression of kidney disease when diabetes is present. More severe renal damage can be found when diabetes is present. Conclusion These findings suggest that sex hormones play a significant role in the development o...
Disabling a sensory organ prompts female mice to act like male mice
...everything from the influences of hormones such as testosterone
to anatomy, positing that there may be a region of the brain that organizes gender-based behavior. The sensory-controlled neural switch that governs the circuit is most likely different in male and female mice, Dulac noted, but that may be the exte...
A sensory organ, not the brain, differentiates male and female behavior in some mammals
...they -- like mutant females in the study -- showed testosterone
levels, estrogen levels, and estrus cycles indistinguishable from those found in normal females. "It had previously been thought that entirely different neural circuits, modulated by these hormones, controlled sex-specific behavior," Dulac says. "R...
News tips from ACS Chemical Biology
... effects How the sex hormones estrogen and testosterone
activate cell signaling pathways Helper peptides that can influence the opening of calcium channels in cell membranes A new technique called the double barrel shotgun approach that helps pinpoint key cellular proteins How trickin...
Females more prone to brain damage from alcohol abuse
... "What we're looking at now is the involvement of testosterone
in mediating the cell death in females," Wiren sai...ns, but in acute (alcohol consumption) situations, testosterone
levels drop in males. In females, they may rise." Wiren also wants to look at a longer withdrawal ...
Other highlights in the July 24 JNCI
...olleagues measured breast density and estrogen and testosterone
levels in postmenopausal women who later developed breast cancer and those who did not. They found that sex hormone levels and breast density are strongly and independently associated with breast cancer risk. Thus, levels of circulating sex stero...
Steroids, not songs, spur growth of brain regions in sparrows
...eek after the surgery, all of the birds were given testosterone
implants and were shifted to long-day light conditions, similar to what they would encounter during their breeding season in Alaska. The birds three song-control regions are called the HVC, RA and X. All are located in the forebrain and grow quick...
Common environmental chemicals in diet affect fetal ovarian development
...s Unit in Edinburgh, UK, has already found reduced testosterone
and testis cell numbers in the male fetus exposed to sewage sludge at day 110 of gestation. The group has applied for further funding to look more closely at the implications of the sheep findings for humans, for instance by comparing quantities of...
Stressed-out African naked mole-rats may provide clues about human infertility
...e, while in the non-breeding males it causes lower testosterone
concentrations, and lower numbers of sperm. In mos...he breeding males, so that concentrations of their testosterone
are suppressed except when she is ready to mate. However, this stress-related block to fertility i...
Researchers find gene that spurs development of the epididymis
...e reproductive structures depend on an increase in testosterone
levels that begins in the latter half of the life ...mbryo. But all the normal indicators of adequate testosterone
levels (its production and other physiological characteristics) were present in the mutant embryos. ...
ASU research shows connection between testosterone, dietary antioxidants and bird coloration
...They appear to fight off the negative impacts that testosterone
can have on an animals health. The researchers,...ealth price to the animal. This study shows that testosterone
may not be as costly as previously thought, so long as animals can nutritionally offset the immune d...
Older men may not live as long if they have low testosterone
Low levels of testosterone
may increase the long-term risk of death in men ov...udy strongly suggests that the association between testosterone
levels and death is not simply due to some acute illness," said Laughlin. In the study, Laughlin a...
How does day length affect aggression in mice? It's in the genes
...en were fitted with implants that controlled their testosterone
levels. The males were then treated with a drug wh... of the few that has shown how hormones other than testosterone
can affect aggression in mammals. "This goes against the common belief that testosterone
is the h...
Testosterone may help men with multiple sclerosis
...lot study at UCLA now shows promise for the use of testosterone
to combat its effects in men. Reporting in the M...er colleagues have found that the application of a testosterone
gel for men with MS reduced symptoms, slowed brain degeneration and increased muscle mass in men wit...
Hot flashes -- Studies explore the role of genes, obesity and alcohol
...dex (BMI) was significantly correlated with higher testosterone
and lower total estradiol, estrone, progesterone and sex hormone binding globulin (SHBG) in midlife women. The researchers were surprised by the findings related to estrogen, because adipose tissue produces and stores estradiol, the major estrogen ...
Phthalates now linked to fat, related health risks
...halates and other common chemicals may be reducing testosterone
levels or function in men, and thereby contributin...al Health Perspectives. "Substantial declines in testosterone
levels and sperm quality have been observed in the United States and other countries over the last s...
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