Extension of the established period of diacetyl adaptation by oxygen intermediates in the nematode Caenorhabditis elegans

Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
Asuka NishinoTetsuya Matsuura

Abstract

After pre-exposure to the odorant diacetyl, the nematode Caenorhabditis elegans showed a decline in chemotactic responses to diacetyl, a phenomenon known as diacetyl adaptation. In the present study, we found that the established period of diacetyl adaptation in nematodes increased with the breeding temperature. When wild-type (N2) nematodes were bred at 15°C, adaptation was observed from the young adult (YA) to the 3-day-old adult that is reached 3 days after the YA stage. On breeding nematodes at 20°C and 25°C, adaptation was observed between the YA and 5-day-old adult and between the YA and the 7-day-old adult, respectively. Breeding temperature has been shown to correlate with the rate of aging in nematodes, which is related to the level of oxygen consumption. Accordingly, long-lived isp-1 and clk-1 mutants that demonstrate decreased levels of oxygen consumption showed a shorter established period of adaptation than N2 nematodes, whereas short-lived gas-1 and mev-1 mutants that have a hypersensitive response to oxygen showed a longer period of adaptation than the N2. Moreover, the established period of diacetyl adaptation in N2 nematodes was shortened by the antioxidant α-lipoic acid. These results suggest that oxygen inter...Continue Reading

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Citations

Jul 22, 2016·Journal of Experimental Zoology. Part A, Ecological Genetics and Physiology·Takuya UrushihataTetsuya Matsuura

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