Chronobiology – diurnal and seasonal rhythms.

Chronobiology – diurnal and seasonal rhythms.

There is much evidence to indicate that the activities of the neuroendocrine system are not constant; instead, they vary during an individual’s life span and during the course of a 24-h period (circadian rhythmicity) and of a year (seasonal variation). Those studies that have been performed indicate

1) seasonal rhythmicity,

2) seasonal rhythmicity in patients with obesity,

3) the effect of dietary restriction, intermittent food restriction, and chronotype on diurnal rhythms,

 4) that the autonomic nervous might play a role in these seasonal changes and that other systems, including the thermoregulatory and immune systems, are also affected,

5) clock genes and seasonality.

Selected publications:

1. Kanikowska D, Sugenoya J, Sato M, Shimizu Y, Inukai Y, Nishimura N, Iwase S. Seasonal variation in blood concentrations of interleukin-6, adrenocorticotrophic hormone, metabolites of catecholamine and cortisol in healthy volunteers. Int J Biometeorol. 2009 Nov;53(6):479-85.
   https://doi.org/10.1007/s00484-009-0236-1
2. Sato M, Kanikowska D, Iwase S, Shimizu Y, Nishimura N, Inukai Y, Sato M, Sugenoya J. Seasonal differences in melatonin concentrations and heart rates during sleep in obese subjects in Japan. Int J Biometeorol. 2013 Sep;57(5):743-8.
   https://doi.org/10.1007/s00484-012-0601-3
3. Kanikowska D, Sato M, Sugenoya J, Shimizu Y, Nishimura N, Inukai Y, Iwase S. Attenuated thermoregulatory responses with increased plasma osmolality in obese subjects during two seasons. Int J Biometeorol. 2013 Sep;57(5):663-7.
   https://doi.org/10.1007/s00484-012-0592-0
4. Kanikowska D, Sato M, Iwase S, Shimizu Y, Nishimura N, Inukai Y, Sugenoya J. Effects of living at two ambient temperatures on 24-h blood pressure and neuroendocrine function among obese and non-obese humans: a pilot study. Int J Biometeorol. 2013 May;57(3):475-81.
   https://doi.org/10.1007/s00484-012-0574-2
5. Kanikowska D, Sato M, Witowski J. Contribution of daily and seasonal biorhythms to obesity in humans. Int J Biometeorol. 2015 Apr;59(4):377-84.
   https://doi.org/10.1007/s00484-014-0871-z
6. Kanikowska D, Roszak M, Rutkowski R, Sato M, Sikorska D, Orzechowska Z, Bręborowicz A, Witowski J. Seasonal differences in rhythmicity of salivary cortisol in healthy adults. J Appl Physiol (1985). 2019 Mar 1;126(3):764-770. doi: 10.1152/japplphysiol.00972.2018.
   https://doi.org/10.1152/japplphysiol.00972.2018
7. Nakamoto I, Uiji S, Okata R, Endo H, Tohyama S, Nitta R, Hashimoto S, Matsushima Y, Wakimoto J, Hashimoto S, Nishiyama Y, Kanikowska D, Negoro H, Wakamura T. Diurnal rhythms of urine volume and electrolyte excretion in healthy young men under differing intensities of daytime light exposure. Sci Rep. 2021 Jun 23;11(1):13097.
   https://doi.org/10.1038/s41598-021-92595-0
8. Strojny Z, Rutkowski R, Kanikowska A, Zawada A, Juchacz A, Grzymisławski M, Sato M, Litwinowicz M, Korybalska K, Bręborowicz A, Witowski J, Kanikowska D. No Significant Effect of the Individual Chronotype on the Result of Moderate Calorie Restriction for Obesity-A Pilot Study. Nutrients. 2021 Nov 15;13(11):4089.
   https://doi.org/10.3390/nu13114089
9. Sato M, Hayashi H, Kanikowska D. Seasonal differences in clock gene expression levels in buccal epithelial cells of obese men: a pilot study. Int J Biometeorol. 2021 Jul;65(7):1119-1124. doi: 10.1007/s00484-021-02092-2.
   https://doi.org/10.1007/s00484-021-02092-2
10. Marciniak M, Sato M, Rutkowski R, Zawada A, Juchacz A, Mahadea D, Grzymisławski M, Dobrowolska A, Kawka E, Korybalska K, Bręborowicz A, Witowski J, Kanikowska D. Effect of the one-day fasting on cortisol and DHEA daily rhythm regarding sex, chronotype, and age among obese adults. Front Nutr. 2023 Feb 6;10:1078508.
    https://doi.org/10.3389/fnut.2023.1078508