LITE-1 Mediates X-ray Avoidance Response in C. elegans
Cannon, K. E.; Ranasinghe, M.; Do, A.; Pierce, H. M.; Millhouse, P. W.; Roychowdhury, A.; Foulger, S. H.; Dobrunz, L. E.; Anker, J. N.; Bolding, M.
Show abstract
We report the finding that C. elegans display X-ray avoidance behavior at high but well tolerated doses, and that this behavior appears to require LITE-1, a gustatory receptor that has been implicated in UV avoidance behavior. We recorded acute behavioral responses of wildtype worms to increasing intensities of X-ray stimulation and found a positive stimulation-response relationship. Mutant strains of worms with dysfunctional photoreceptor proteins LITE-1 and GUR-3 were assayed, and the X-ray avoidance response was found to be nearly absent in LITE-1 mutants but not GUR-3 mutants, suggesting a prominent role for LITE-1 in the detection of X-rays. These findings may be important for developing optogenetics tools to stimulate cells in deep tissue using X-rays, for understanding the mechanism of LITE-1 signaling, and for understanding how organisms may respond to radiation.
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