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12-hour phase-shift of mice kidney rhodanese (thiosulfate sulfurtransferase) activity in the first two months of life



12-hour phase-shift of mice kidney rhodanese (thiosulfate sulfurtransferase) activity in the first two months of life



Biological Rhythm Research 39(2): 163-171



This study aimed to investigate and compare variation of renal rhodanese activity at 2(nd), 4(th) and 8(th) weeks of post-natal development (PND) in mice. The enzyme activity increased with age and was higher in females compared to males in all studied groups. Cosinor analysis revealed significant circadian rhythms (with period tau = 24 h) of enzyme activity in both genders with peak time shift during the PND. At the 2(nd) week of PND (pre-weaning time), the circadian rhythm peaked at the beginning of light span, more precisely congruent to 1 HALO ((H) under bar ours (A) under bar fter (L) under bar ight Onset). A week after weaning (4(th) week of PND), the peak time was located at the second half-of photophase (congruent to 9 HALO) in both genders. Four to six weeks later, about the 8(th) week of PND, the circadian peak time was then recorded at congruent to 13 HALO. These findings suggest that rhodanese level and rhythm stabilization were age-dependent. Moreover, gender-related differences may stimulate discussions on the relationship between renal rhodanese and cyanide sensitivity.

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Accession: 022130931

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DOI: 10.1080/09291010701424812


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