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Melatonin in the unicellular Tetrahymena pyriformis : effects of different lighting conditions
Author(s) -
Köhidai L.,
Vakkuri O.,
Keresztesi M.,
Leppäluoto J.,
Csaba G.
Publication year - 2002
Publication title -
cell biochemistry and function
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.933
H-Index - 61
eISSN - 1099-0844
pISSN - 0263-6484
DOI - 10.1002/cbf.973
Subject(s) - melatonin , tetrahymena pyriformis , secretion , tetrahymena , biology , pineal gland , circadian rhythm , chemistry , medicine , endocrinology , microbiology and biotechnology
Melatonin content in the cellular fraction and medium of Tetrahymena pyriformis GL cultures was measured at different time points of light and dark exposures. Tetrahymena produced, stored and secreted immunoreactive melatonin, which in displacement and HPLC studies, behaved like synthetic melatonin. There was not a continuous secretion of melatonin produced by the cells. In contrast to this, storage of melatonin was observed, which was more expressed in dark conditions. Prolonged light exposure suppressed melatonin production and secretion alike, however it did not block it completely. Copyright © 2002 John Wiley & Sons, Ltd.