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  • Title: Effects of hormones on chemotaxis in Tetrahymena: investigations on receptor memory.
    Author: Köhidai L, Karsa J, Csaba G.
    Journal: Microbios; 1994; 77(311):75-85. PubMed ID: 8152393.
    Abstract:
    The peptide type hormones such as insulin and adenocorticotropic hormone (ACTH) have a positive chemoattractant effect on Tetrahymena. Non-hormone protein-sulphate provoked negative chemoattraction. Of the amino acid type hormones, serotonin produced negative, and the histamine and di-iodotyrosine induced positive chemotactic effects. The first encounter with these molecules may modify the chemotactic behaviour of the progeny cells. In a significant number of cases there was a different response after repeated encounters of cells and hormones.
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