Study links pain and aging: Mice genetically engineered to lack a pain receptor called TRPV1 live 12 to 16 percent longer than typical lab mice, according to a study published this week in Cell. The mutant mice also showed increased energy expenditure, oxygen consumption, and energy levels.
Double mastectomies on the rise, but most not necessary: A study of 1,447 women who were diagnosed with cancer in one breast found that 19 percent of the women seriously considered having a double mastectomy. Almost 8 percent chose to have the surgery. But 69 percent of the women who went ahead with the surgery had no risk factors that would make it more likely that they would get breast cancer again. According to the study, published in JAMA Surgery, the top reasons were anxiety and MRIs. Even if the MRI didn’t show more cancer, women who had the scan were more likely to opt for a double mastectomy.
Diabetes increases women’s risk of heart disease more than it does for men: Type 2 diabetes raises the risk of heart disease in both men and women, but a recent review of 64 studies has found that the increased risk is much more prevalent in women. Diabetic women were found to have a 44 percent higher risk for heart disease than diabetic men.