Dried plum diet protects from bone loss caused by ionizing radiation

Area of Science:

• Radiation biology
• Skeletal physiology
• Nutritional science

Background:

• Ionizing radiation exposure can cause significant bone loss, increasing oxidative damage and disrupting bone remodeling through enhanced osteoclast activity.
• This poses a health risk for individuals undergoing radiotherapy, radiation workers, and astronauts during space missions.

Purpose of the Study:

• To evaluate the efficacy of antioxidant and anti-inflammatory interventions in mitigating radiation-induced bone loss.
• To assess the impact of these interventions on the expression of key bone resorption-related genes following irradiation.

Main Methods:

• Animal models were exposed to gamma rays (photons) or simulated space radiation (protons and heavy ions).
• Candidate interventions including an antioxidant cocktail, dihydrolipoic acid, ibuprofen, and dried plum were administered.
• Gene expression analysis of resorption markers (Nfe2l2, Rankl, Mcp1, Opg, TNF-α) and bone density measurements were performed.

Main Results:

• Dried plum (DP) demonstrated the most significant reduction in the expression of radiation-induced bone resorption genes.
• DP supplementation was effective in preventing cancellous bone loss caused by both photon and heavy ion irradiation.
• Other tested interventions showed less pronounced effects compared to dried plum.

Conclusions:

• Dietary dried plum supplementation is a promising strategy to prevent skeletal damage from radiation exposure.
• DP may offer a protective effect against bone loss for radiotherapy patients, radiation workers, and astronauts.
• Further research into DP's mechanisms and clinical application is warranted.