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Science News for December 4, 2000


Breast-cancer risk related to insulin-resistance indicators, elevated levels of sex hormones, UB study shows

A new UB study reveals a significant association between breast cancer risk and physical characteristics of insulin resistance, including abdominal fat distribution and higher-than-normal male and female sex hormones. Women with increased waist-to-hip ratio and oily skin are at greater risk of developing breast cancer.

SourceUniversity at Buffalo·JournalCancer Causes & Control·DateDec 4, 2000

'Translocation' surgery yields unprecedented results

A new operation developed at Johns Hopkins improves vision for nearly half of the first 100 patients treated with early-stage macular degeneration. Six months after surgery, 48% of patients could read an additional two lines on a standard eye chart or had vision of 20/100 or better, enough to legally drive in Maryland.

SourceJohns Hopkins Medicine·JournalAmerican Journal of Ophthalmology·DateDec 4, 2000

Researchers reveal insidious role of a 'serpin' in Alzheimer's Disease

A team of researchers found that the protein alpha1-antichymotrypsin doubles the accumulation of Alzheimer's disease-associated amyloid plaque in mice brains, indicating a potential therapeutic target. The study suggests that reducing or inhibiting this protein's activity could help prevent plaque formation and brain damage.

SourceUniversity of California - San Francisco·JournalAmerican Journal Of Pathology·DateDec 4, 2000

Game of life allows all mating strategies

A study by Cornell University researchers found that each mating strategy in side-blotched lizards has its advantages and vulnerabilities, allowing them to coexist and perpetuate. The aggressive orange-throated males, loyal blue-throated males, and sneaky yellow-throated males all have a reasonable chance of reproductive success.

SourceCornell University·JournalProceedings of the National Academy of Sciences·DateDec 4, 2000