Open AccessProteins binding the thyroid hormones and their physiological role
Author(s) -
О. В. Свиридов
Publication year - 1994
Publication title -
problemy èndokrinologii
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.124
H-Index - 5
eISSN - 2308-1430
pISSN - 0375-9660
DOI - 10.14341/probl12197
Subject(s) - hormone , steroid , triiodothyronine , thyroid , receptor , thyroid hormones , chemistry , hormone receptor , biological activity , peptide hormone , globulin , steroid hormone , biology , endocrinology , medicine , biochemistry , in vitro , cancer , breast cancer
Steroid and thyroid hormones exert a regulatory effect on a whole range of physiological processes that form the basis of the normal development and functioning of the body. In the channel of human blood, from 96 to 99.9% of the total masses of cortisol, progesterone, thyroxine and triiodothyronine circulate in the form of complexes with hormone-binding transport proteins. The free hormone" hypothesis assigns to these transport proteins the passive function of maintaining a stationary pool of biologically active unbound hormones due to the rapid dissociation of complexes in response to the needs of target tissues. Recent studies have revealed the active role of transport proteins and their receptors on the surface of cell membranes in the interaction of steroid and thyroid hormones with competent tissues.
The structural aspects of the biological activity of complexes of corticosteroid-binding and sex steroid-binding globulins with natural ligands are described in detail in a review article. This literature review is devoted to the description of the physicochemical properties and biomedical characteristics of a multicomponent system of proteins that bind thyroid hormones in human blood plasma. Particular attention is paid to the physiological significance of these proteins in the framework of the hypothesis of free hormones and in the light of their recently discovered specific transport functions.