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001-es BibID:	BIBFORM033987
Első szerző:	Knüver, Jana
Cím:	Thyrotropin-releasing hormone controls mitochondrial biology in human epidermis / Knuever J., Poeggeler B., Gáspár E., Klinger M., Hellwig-Burgel T., Hardenbicker C., Tóth B. I., Bíró T., Paus R.
Dátum:	2012
ISSN:	0021-972X
Megjegyzések:	Context: Mitochondrial capacity and metabolic potential are under the control of hormones, such as thyroid hormones. The most proximal regulator of the hypothalamic-pituitary-thyroid (HPT) axis, TRH, is the key hypothalamic integrator of energy metabolism via its impact on thyroid hormone secretion. Objective: Here, we asked whether TRH directly modulates mitochondrial functions in normal, TRH-receptor-positive human epidermis. Methods: Organ-cultured human skin was treated with TRH (5-100 ng/ml) for 12-48 h. Results: TRH significantly increased epidermal immunoreactivity for the mitochondria-selective subunit I of respiratory chain complex IV (MTCO1). This resulted from an increased MTCO1 transcription and protein synthesis and a stimulation of mitochondrial biogenesis as demonstrated by transmission electron microscopy and TRH-enhanced mitochondrial DNA synthesis. TRH also significantly stimulated the transcription of several other mitochondrial key genes (TFAM, HSP60, and BMAL1), including the master regulator of mitochondrial biogenesis (PGC-1 alpha). TRH significantly enhanced mitochondrial complex I and IV enzyme activity and enhanced the oxygen consumption of human skin samples, which shows that the stimulated mitochondria are fully vital because the main source for cellular oxygen consumption is mitochondrial endoxidation. Conclusions: These findings identify TRH as a potent, novel neuroendocrine stimulator of mitochondrial activity and biogenesis in human epidermal keratinocytes in situ. Thus, human epidermis offers an excellent model for dissecting neuroendocrine controls of human mitochondrial biology under physiologically relevant conditions and for exploring corresponding clinical applications. (J Clin Endocrinol Metab 97: 978-986, 2012)
Tárgyszavak:	Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:	Journal of Clinical Endocrinology & Metabolism 97 : 3 (2012), p. 978-986. -
További szerzők:	Poeggeler, Burkhard Gáspár E. Klinger, Matthias Hellwig-Burgel, T. Hardenbicker, Celine Tóth István Balázs (1978-) (élettanász) Bíró Tamás (1968-) (élettanász) Paus, Ralf
Internet cím:	DOI elektronikus változat Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM016011
Első szerző:	Langan, Ewan A.
Cím:	Thyrotropin-releasing hormone and oestrogen differentially regulate prolactin and prolactin receptor expression in female human skin and hair follicles in vitro / Langan, E. A., Ramot, Y., Hanning, A., Poeggeler, B., Biro, T., Gaspar, E., Funk, W., Griffiths, C. E. M., Paus, R.
Dátum:	2010
ISSN:	0007-0963
Megjegyzések:	Human skin and scalp hair follicles are both a nonclassical target and an extrapituitary source of prolactin (PRL), which is a potent hair growth modulator. However, how the expression of PRL and PRL receptor (PRLR) is regulated in human skin is unknown. Objectives To investigate whether two key stimulators of pituitary PRL secretion, thyrotropin-releasing hormone (TRH) and oestrogen, also regulate cutaneous PRL and PRLR expression. Methods Female scalp skin and/or microdissected hair follicles were treated for 6 days in serum-free organ culture with oestrogen (100 nmol L-1), TRH (1-10 ng mL-1, 3-30 nm) or vehicle control. Quantitative immunohistomorphometry of skin and hair follicle sections was complemented with quantitative polymerase chain reaction for PRL and PRLR in cultured hair follicles and/or female human outer root sheath (ORS) keratinocytes. Results Oestrogen treatment significantly upregulated PRL and PRLR immunoreactivity in selected skin and hair follicle compartments, at the gene and protein level (P < 0 center dot 05). TRH significantly increased PRL immunoreactivity and transcription in hair follicles (P < 0 center dot 05); however, while it also increased PRLR transcription in hair follicles, it downregulated PRLR immunoreactivity in the hair follicle ORS (P < 0 center dot 05). Conclusions Our pilot study shows that two key endocrine controls of pituitary PRL secretion, oestrogen and TRH, also regulate PRL and PRLR expression in human skin. This provides novel insights into the regulation of extrapituitary PRL and PRLR expression, and invites exploration of oestrogen and TRH as novel therapeutic agents in the management of skin and hair diseases characterized by aberrant PRLR-mediated signalling.
Tárgyszavak:	Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:	British Journal of Dermatology. - 162 : 5 (2010), p. 1127-1131. -
További szerzők:	Ramot, Yuval Hanning, A. Poeggeler, Burkhard Bíró Tamás (1968-) (élettanász) Gáspár E. Funk, W. Griffiths, Christopher E. M. Paus, Ralf
Internet cím:	DOI Intézményi repozitóriumban (DEA) tárolt változat
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