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Dynamics of hormone and metabolic state in polar inhabitants depend on daylight duration.

https://arctichealth.org/en/permalink/ahliterature227518
Source
Arctic Med Res. 1991;50 Suppl 6:152-5
Publication Type
Article
Date
1991
Author
A V Tkachev
E B Ramenskaya
J R Bojko
Author Affiliation
Institute of Physiology, USSR Academy of Sciences, Archangelsk.
Source
Arctic Med Res. 1991;50 Suppl 6:152-5
Date
1991
Language
English
Publication Type
Article
Keywords
Adult
Arctic Regions
Cholesterol - blood
Cold Climate
Hormones - blood
Humans
Light
Male
Abstract
Fluctuations in the level of TSH, T3, T4 and total cholesterol were determined in male aborigines and native polar inhabitants in different photoperiods of the year. It was found that a rise of serum TSH and T3 and a reduction of the thyroxine level and total cholesterol occurred in both population groups with the lengthening of daylight duration. However, the amplitude of annual fluctuations in the studied variables was different. There was a significant correlation between TSH, T4 and T3 levels and daylight duration. The photoperiodical contrasts of the polar regions are probably important in the formation of the annual fluctuations of hormone levels of the hypophysis-thyroid gland system and total cholesterol.
PubMed ID
1811572 View in PubMed
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Endocrine status and plasma lipids in inhabitants of the northern European part of the USSR.

https://arctichealth.org/en/permalink/ahliterature227519
Source
Arctic Med Res. 1991;50 Suppl 6:148-51
Publication Type
Article
Date
1991
Author
A V Tkachev
J R Bojko
E B Ramenskaya
Author Affiliation
Institute of Physiology, USSR Academy of Sciences, Archangelsk.
Source
Arctic Med Res. 1991;50 Suppl 6:148-51
Date
1991
Language
English
Publication Type
Article
Keywords
Adult
Cold Climate
Hormones - blood
Humans
Lipids - blood
Male
Middle Aged
USSR
Abstract
Inhabitants of the northern districts of the Archangelsk Region of the USSR (Nenets and natives) were examined. Hormones of the hypophysis-adrenal cortex-thyroid gland system as well as the metabolites of lipid exchange were measured during the year. Higher mean levels of TSH and T3 were found in Nenets compared to natives. Activation of the hypophysis-thyroid gland system was demonstrated in the winter period compared to the summer one. Metabolites involved in lipid exchange transport in blood remained stable in Nenets, while natives showed dynamics of the lipid exchange metabolites related to the different seasons of the year.
PubMed ID
1811571 View in PubMed
Less detail