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001-es BibID:	BIBFORM048833
035-os BibID:	PMID:23949722
Első szerző:	Vidali, Silvia
Cím:	Hypothalamic-Pituitary-Thyroid Axis Hormones Stimulate Mitochondrial Function and Biogenesis in Human Hair Follicles / Silvia Vidali, Jana Knuever, Johannes Lerchner, Melanie Giesen, Tamás Bíró, Matthias Klinger, Barbara Kofler, Wolfgang Funk, Burkhard Poeggeler, Ralf Paus
Dátum:	2014
ISSN:	0022-202X
Megjegyzések:	Thyroid hormones regulate mitochondrial function. As other hypothalamic-pituitary-thyroid (HPT) axis hormones, i.e., thyrotropin-releasing hormone (TRH) and thyrotropin (TSH), are expressed in human hair follicles (HFs) and regulate mitochondrial function in human epidermis, we investigated in organ-cultured human scalp HFs whether TRH (30?nM), TSH (10?mU?ml-1), thyroxine (T4) (100?nM), and triiodothyronine (T3) (100?pM) alter intrafollicular mitochondrial energy metabolism. All HPT-axis members increased gene and protein expression of mitochondrial-encoded subunit 1 of cytochrome c oxidase (MTCO1), a subunit of respiratory chain complex IV, mitochondrial transcription factor A (TFAM), and Porin. All hormones also stimulated intrafollicular complex I/IV activity and mitochondrial biogenesis. The TSH effects on MTCO1, TFAM, and porin could be abolished by K1-70, a TSH-receptor antagonist, suggesting a TSH receptor-mediated action. Notably, as measured by calorimetry, T3 and TSH increased follicular heat production, whereas T3/T4 and TRH stimulated ATP production in cultured HF keratinocytes. HPT-axis hormones did not increase reactive oxygen species (ROS) production. Rather, T3 and T4 reduced ROS formation, and all tested HPT-axis hormones increased the transcription of ROS scavengers (catalase, superoxide dismutase 2) in HF keratinocytes. Thus, mitochondrial biology, energy metabolism, and redox state of human HFs are subject to profound (neuro-)endocrine regulation by HPT-axis hormones. The neuroendocrine control of mitochondrial biology in a complex human mini-organ revealed here may be therapeutically exploitable.
Tárgyszavak:	Orvostudományok Klinikai orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban Calcium (Ca2+) signalling Ion channel Membrane transport Molecular mechanisms of disease Skin TRP channels
Megjelenés:	Journal of Investigative Dermatology. - 134 (2014), p. 33-42. -
További szerzők:	Knüver, Jana Lerchner, Johannes Giesen, Melanie Bíró Tamás (1968-) (élettanász) Klinger, Matthias Kofler, Barbara Funk, Wolfgang Poeggeler, Burkhard Paus, Ralf
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