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با سلام خدمت تمام دوستان نخبه @};-
در اين بخش قصد داريم خبرهاي انگليسي رو در اين بخش قرار بديم تا دوستان بتونن بهتر استفاده كنن;)
از همه درخواست ميشه به ما در تكميل اين بخش كمك كنن;;)
حتي الامكان اگه با ترجمه باشه خيلي بهتره

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High Dose Folate And B Vitamin Supplements Increase Uterine Cancer Risk

Women who take large amounts of folate, vitamin B2, B6 or B12 supplements may be increasing their risk of uterine cancer (http://www.medicalnewstoday.com/info/cancer-oncology/whatiscancer.php), according to research presented at the 16th International Meeting of the European Society of Gynaecological Oncology (ESGO) in Belgrade, Serbia, 11-14 October 2009.

Results from a 20 year follow up of dietary intake in over 23,000 postmenopausal women taking part in the Iowa Women's Health Study, have shown that women who consumed large amounts of the supplements were twice as likely to get type II uterine cancer than women who had normal intakes, although there was no effect on type I uterine cancer.

Dr S Uccella, from the department of gynaecologic surgery at the Mayo Clinic, Rochester, USA., explained that the results contrasted with the expected protective effects of the supplements and further investigation showed that, while a folate intake of 200-600mcg/day did have a protective effect, taking higher levels nearer 1000mcg/day increased the risk of uterine cancer.

He concluded that the research could have implications for women's health in countries such as the USA and Canada, where folate and B vitamins are added to foodstuffs, and other countries considering similar action.

Source
European Society of Gynaecological Oncology

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Sleep Habits and Susceptibility to the Common Cold

Sheldon Cohen, PhD; William J. Doyle, PhD; Cuneyt M. Alper, MD; Denise Janicki-Deverts, PhD; Ronald B. Turner, MD

Arch Intern Med. 2009;169(1):62-67.
Background Sleep quality is thought to be an important predictor of immunity and, in turn, susceptibility to the common cold. This article examines whether sleep duration and efficiency in the weeks preceding viral exposure are associated with cold susceptibility.
Methods A total of 153 healthy men and women (age range, 21-55 years) volunteered to participate in the study. For 14 consecutive days, they reported their sleep duration and sleep efficiency (percentage of time in bed actually asleep) for the previous night and whether they felt rested. Average scores for each sleep variable were calculated over the 14-day baseline. Subsequently, participants were quarantined, administered nasal drops containing a rhinovirus, and monitored for the development of a clinical cold (infection in the presence of objective signs of illness) on the day before and for 5 days after exposure.
Results There was a graded association with average sleep duration: participants with less than 7 hours of sleep were 2.94 times (95% confidence interval [CI], 1.18-7.30) more likely to develop a cold than those with 8 hours or more of sleep. The association with sleep efficiency was also graded: participants with less than 92% efficiency were 5.50 times (95% CI, 2.08-14.48) more likely to develop a cold than those with 98% or more efficiency. These relationships could not be explained by differences in prechallenge virus-specific antibody titers, demographics, season of the year, body mass, socioeconomic status, psychological variables, or health practices. The percentage of days feeling rested was not associated with colds. Conclusion Poorer sleep efficiency and shorter sleep duration in the weeks preceding exposure to a rhinovirus were associated with lower resistance to illness.

Author Affiliations: Department of Psychology, Carnegie Mellon University, Pittsburgh, Pennsylvania (Drs Cohen and Janicki-Deverts); Department of Otolaryngology, Children's Hospital of Pittsburgh and University of Pittsburgh School of Medicine (Drs Doyle and Alper); and Department of Pediatrics, University of Virginia Health Sciences Center, Charlottesville (Dr Turner).



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