Probiotics,stop,menopause-like health Probiotics stop menopause-like bone loss in mice
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Probiotic supplements protected female mice from the loss of bone density that occurs after having their ovaries removed, researchers at Emory University School of Medicine and Georgia State University have shown.The results were published Monday, April 25 in Journal of Clinical Investigation.In mice, ovary removal induces the hormonal changes that occur with menopause in women. The findings suggest that probiotic bacteria may have potential as an inexpensive treatment for post-menopausal osteoporosis. However, clinical evidence that probiotics can have a lasting effect on the mix of bacteria in the body is limited.The immune system was known to be involved in post-menopausal osteoporosis, but the mechanism was previously unclear. Emory and Georgia State researchers found that in mice, the loss of estrogen increases gut permeability, which allows bacterial products to activate immune cells in the intestine. In turn, immune cells release signals that break down bone. Probiotics both tighten up the permeability of the gut and dampen inflammatory signals that drive the immune cells, the team found.“Our findings highlight the role that intestinal microbes play in modulating gut permeability and inflammation in the context of sex steroid depletion,” says senior author Roberto Pacifici, MD. “We think there are direct implications for the treatment of osteoporosis that should be tested clinically.”Researchers led by Pacifici treated female mice twice a week with Lactobacillus rhamnosus GG (LGG), a type of bacteria found in some yogurts, or with a commercially available mix of eight strains of bacteria known as VSL#3..A month after ovary removal, mice that were not treated with probiotic bacteria had lost half of their bone density. But the bone density in probiotic-treated mice stayed the same, the researchers observed.The type of bacteria was important; treating mice with a laboratory strain of E. coli bacteria lacking probiotic properties did not help, and a mutant LGG bacteria with a defect in sticking to intestinal cells provided a weakened protective effect. In mice that did not have their ovaries removed, probiotic treatment actually led to an increase in bone density.The scientists also tested the role of gut bacteria in bone loss by studying mice that were raised under germ-free conditions. In this situation, surgical ovary removal is not feasible so the research team used the drug leuprolide, which reduces hormone production by the ovaries. Germ-free mice treated with leuprolide do not have a reduction in bone density.- medicalnewstoday.comFor more , Please visit us :http://Salamatezanan.ir/enAlso you can read our articles in Persian Language , Please visit us :http://Salamatezanan.ir Article Tags: Bone Loss, Bone Density, Ovary Removal, Immune Cells
Probiotics,stop,menopause-like