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Rethinking the role of microbiome in age-related bone loss

Dec 30 , 2024

Osteoporosis is a global health issue especially among the elderly. While pharmacological treatments exist their effectiveness is hindered by side effects high costs and accessibility issues leading to poor adherence. The gut microbiome has emerged as a potential regulator of bone metabolism but its stability and impact are influenced by aging. This has prompted researchers to focus on identifying non-microbial factors contributing to age-related bone loss.

A collaborative study published in Bone Research explored the role of the microbiome in age-related bone loss. Using advanced genetic sequencing and metabolomic tools the researchers assessed bone health in CB6F1 mice under both germ-free and microbiome-colonized conditions to determine the microbiome's impact on bone deterioration during aging.

The study revealed that bone loss in germ-free mice mirrored that of their microbiome-colonized counterparts debunking the belief that gut microbes significantly influence age-related bone deterioration. Over 21 months both groups exhibited comparable declines in trabecular bone volume and cortical thickness underscoring that bone loss occurs independently of gut microbiota. Although age-related shifts in microbial composition and function were observed—such as increased amino acid and protein biosynthesis these changes did not affect bone health. Even microbiota transplants from young or old donors into germ-free mice had no discernible impact regardless of donor age or colonization duration. These findings redirect attention to other biological pathways as potential drivers of osteoporosis.

The team highlighted the microbiome's influence on other health aspects but emphasized its limited role in bone health during aging.

These results pave the way for rethinking osteoporosis interventions suggesting that genetic hormonal or environmental factors may hold greater significance. Future research could leverage these insights to develop innovative therapies ultimately improving care for aging populations. While the microbiome remains a crucial research frontier this study underscores the importance of broadening the lens to fully understand bone health.

Source: https://www.news-medical.net/news/20241230/Rethinking-the-role-of-microbiome-in-age-related-bone-loss.aspx


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