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Changing length of days reverses how estrogen affects aggressiveness in mice
10-18-2006 · EurekAlert!New research shows how simply varying the length of daylight to which mice are exposed to can change how aggressively they react to other mice. The study found that in the short days of winter, the class of hormones called estrogens acts to increase aggression in males of a particular type of mouse called the Oldfield Mouse, or Peromyscus polionotus.
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Keywords: changing, length, days, reverses, estrogen, affects, aggressiveness, mice, day, reverse, affect
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- How does day length affect aggression in mice? It's in the genes
05-21-2007 · EurekAlert!
Imagine if a naturally occurring chemical in your body could help make you feel more calm and relaxed -- but it would only work during the long days of summer. The same chemical would, instead, make you aggressive and nasty when you were exposed to less daylight during the winter. That's exactly what occurs for a specific species of mouse.
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- Women on hormone therapy regain emotion response
10-16-2006 · EurekAlert!
Older women on hormone therapy are more sensitive to negative events, confirming speculation that age-related estrogen loss affects the brain's ability to process emotion, an Oregon Health & Science University study shows. Researchers found that hormone therapy appears to reverse the age-related loss of arousal to negative emotional events experienced by the elderly. It also points to specific changes in the brain's arousal system, in the regions that process emotion, and intensification of negative emotions.
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- Cancer conflict with chemotherapy treatment
10-10-2007 · EurekAlert!
Women under the age of 40 with breast cancer who are given drugs in addition to lumpectomies or radiotherapy, known as adjuvant chemotherapy, may not be benefiting from these drugs. This is especially true if their tumors respond to changing levels of hormones such as estrogen, according to research published in the online journal, Breast Cancer Research.
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02-02-2007 · EurekAlert!
Fluctuations in sex hormone levels during women's menstrual cycles affect the responsiveness of their brains' reward circuitry, an imaging study has revealed. While women were winning rewards, their circuitry was more active if they were in a menstrual phase preceding ovulation and dominated by estrogen, compared to a phase when estrogen and progesterone are present. These first pictures of sex hormones influencing reward-evoked brain activity in humans may provide insights into mood and anxiety disorders.
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- The neurobiology behind why eating feels so good
10-19-2006 · EurekAlert!
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- Spearmint tea -- A possible treatment for mild hirsutism
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Women with hirsutism grow hair on their faces, breasts and stomachs. This can cause great distress. The hair grows because they have abnormally high levels of the "masculinising" androgen hormones. Androgens travel around the body in the blood stream, and a key way of treating hirsutism is to reduce the level of these androgens. Data just published in Phytotherapy Research shows that drinking two cups of spearmint tea a day for five days could reduce the level of androgens in women with hirsutism.
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09-10-2007 · EurekAlert!
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10-01-2007 · EurekAlert!
Microscopic worms used for scientific research are living longer despite cellular defects, a discovery that is shedding light on how the human body ages and how doctors could one day limit or reverse genetic mutations that cause inherited diseases, according to a new University of Colorado at Boulder study.
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