Találati lista | Tudóstér

001-es BibID:	BIBFORM049598
035-os BibID:	(Scopus)84881242676 (WoS)000325593700011 (PMID)23860260
Első szerző:	Szénási Tibor
Cím:	Hmgb1 can facilitate activation of the matrilin-1 gene promoter by Sox9 and L-Sox5/Sox6 in early steps of chondrogenesis / Tibor Szénási, Erzsébet Kénesi, Andrea Nagy, Annamária Molnár, Bálint László Bálint, Ágnes Zvara, Zsolt Csabai, Ferenc Deák, Beáta Boros Oláh, Lajos Mátés, László Nagy, László G. Puskás, Ibolya Kiss
Dátum:	2013
ISSN:	1874-9399
Megjegyzések:	The architectural high mobility group box 1 (Hmgb1) protein acts as both a nuclear and an extracellular regulator of various biological processes, including skeletogenesis. Here we report its contribution to the evolutionarily conserved, distinctive regulation of the matrilin-1 gene (Matn1) expression in amniotes. We previously demonstrated that uniquely assembled proximal promoter elements restrict Matn1 expression to specific growth plate cartilage zones by allowing varying doses of L-Sox5/Sox6 and Nfi proteins to fine-tune their Sox9-mediated transactivation. Here, we dissected the regulatory mechanisms underlying the activity of a conserved distal promoter element 1. We show that this element carries three Sox-binding sites, works as an enhancer in vivo, and allows promoter activation by the Sox5/6/9 chondrogenic trio. In early steps of chondrogenesis, declining Hmgb1 expression overlaps with the onset of Sox9 expression. Unlike repression in late steps, Hmgb1 overexpression in early chondrogenesis increases Matn1 promoter activation by the Sox trio, and forced Hmgb1 expression in COS-7 cells facilitates induction of Matn1 expression by the Sox trio. The conserved Matn1 control elements bind Hmgb1 and SOX9 with opposite efficiency in vitro. They show higher HMGB1 than SOX trio occupancy in established chondrogenic cell lines, and HMGB1 silencing greatly increases MATN1 and COL2A1 expression. Together, these data thus suggest a model whereby Hmgb1 helps recruit the Sox trio to the Matn1 promoter and thereby facilitates activation of the gene in early chondrogenesis. We anticipate that Hmgb1 may similarly affect transcription of other cartilage-specific genes.
Tárgyszavak:	Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban Growth plate Cartilage-specific regulation Matrilin Transgenic mice Chromatin immunoprecipitation Silencing
Megjelenés:	Biochimica et Biophysica Acta (BBA). Gene Regulatory Mechanisms. - 1829 : 10 (2013), p. 1075-1091. -
További szerzők:	Kénesi Erzsébet Nagy Andrea Molnár Annamária Bálint Bálint László (1971-) (kutató orvos) Zvara Ágnes Csabai Zsolt Deák Ferenc (Szeged) Boros-Oláh Beáta (1989-) (molekuláris biológus) Mátés Lajos Nagy László (1966-) (molekuláris sejtbiológus, biokémikus) Puskás László G. Kiss Ibolya
Pályázati támogatás:	BO/00781/11 János Bolyai fellowship BO/795/08 János Bolyai fellowship
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon: