A fully plant-based approach to mitigating radiation exposure

The development of effective radioprotective agents has long been a critical research focus due to rising radiation risks from expanding nuclear energy and radiological technologies in civilian and military sectors. Nuclear accidents and the threat of nuclear warfare or terrorism pose major public health challenges, emphasizing the need for pharmacological protection and prevention. Although extensive studies have explored potential radioprotectors, an ideal agent remains elusive. Since ionizing radiation primarily induces free radical-mediated cellular damage, radical scavengers are promising candidates. Synthetic thiol compounds like amifostine gained limited FDA approval, yet no new agents exist for acute radiation syndrome (ARS). In this context, our ongoing research explores non-toxic, natural-origin dietary supplements as potential radioprotectors. Departing from traditional animal-based assays, we employ an innovative, plant-based model using Allium cepa (onion) root meristems. This system provides a rapid, cost-effective, and ethically sound platform for preliminary screening of potential radioprotective compounds. Nanovesicles derived from Opuntia ficus-indica (prickly pear cactus), known for their antioxidant and anti-inflammatory properties, were evaluated for their ability to mitigate cytogenetic damage induced by ionizing radiation. Preliminary findings reveal potential radioprotective effects of Opuntia ficus-indica -derived nanovesicles, warranting further investigation. These results contribute to the global effort to develop accessible, effective countermeasures against radiation exposure, enhancing both civilian and military radiological defense capabilities.