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001-es BibID:	BIBFORM114025
035-os BibID:	(cikkazonosító)1207394 (WoS)001119286500001 (Scopus)85173040621
Első szerző:	Vinnai Boglárka Ágnes (molekuláris biológus)
Cím:	Extracellular thiamine concentration influences thermogenic competency of differentiating neck area-derived human adipocytes / Vinnai Boglárka Ágnes, Arianti Rini, Győry Ferenc, Bacsó Zsolt, Fésüs László, Kristóf Endre
Dátum:	2023
ISSN:	2296-861X
Megjegyzések:	IntroductionBrown adipose tissue (BAT) dissipates energy in the form of heat majorly via the mitochondrial uncoupling protein 1 (UCP1). The activation of BAT, which is enriched in the neck area and contains brown and beige adipocytes in humans, was considered as a potential therapeutic target to treat obesity. Therefore, finding novel agents that can stimulate the differentiation and recruitment of brown or beige thermogenic adipocytes are important subjects for investigation. The current study investigated how the availability of extracellular thiamine (vitamin B1), an essential cofactor of mitochondrial enzyme complexes that catalyze key steps in the catabolism of nutrients, affects the expression of thermogenic marker genes and proteins and subsequent functional parameters during ex vivo adipocyte differentiation.MethodsWe differentiated primary human adipogenic progenitors that were cultivated from subcutaneous (SC) or deep neck (DN) adipose tissues in the presence of gradually increasing thiamine concentrations during their 14-day differentiation program. mRNA and protein expression of thermogenic genes were analyzed by RT-qPCR and western blot, respectively. Cellular respiration including stimulated maximal and proton-leak respiration was measured by Seahorse analysis.ResultsHigher thiamine levels resulted in increased expression of thiamine transporter 1 and 2 both at mRNA and protein levels in human neck area-derived adipocytes. Gradually increasing concentrations of thiamine led to increased basal, cAMP-stimulated, and proton-leak respiration along with elevated mitochondrial biogenesis of the differentiated adipocytes. The extracellular thiamine availability during adipogenesis determined the expression levels of UCP1, PGC1a, CKMT2, and other browning-related genes and proteins in primary SC and DN-derived adipocytes in a concentration-dependent manner. Providing abundant amounts of thiamine further increased the thermogenic competency of the adipocytes.DiscussionCase studies in humans reported that thiamine deficiency was found in patients with type 2 diabetes and obesity. Our study raises the possibility of a novel strategy with long-term thiamine supplementation, which can enhance the thermogenic competency of differentiating neck area-derived adipocytes for preventing or combating obesity.
Tárgyszavak:	Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk obesity adipocytes beige thermogenesis thiamine UCP1
Megjelenés:	Frontiers in Nutrition. - 10 (2023), p. 1-15. -
További szerzők:	Arianti, Rini (1991-) (biokémikus) Győry Ferenc (1964-) (sebész) Bacsó Zsolt (1963-) (biofizikus) Fésüs László (1947-) (orvos biokémikus) Kristóf Endre (1987-) (általános orvos)
Pályázati támogatás:	FK131424 OTKA K129139 OTKA ÚNKP-22-3-I Egyéb
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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