title: Cartilage development requires the function of Estrogen-related receptor alpha that directly regulates sox9 expression in zebrafish.
abstract: Estrogen-related receptor alpha (ESRRa) regulates a number of cellular processes including development of bone and muscles. However, direct evidence regarding its involvement in cartilage development remains elusive. In this report, we establish an in vivo role of Esrra in cartilage development during embryogenesis in zebrafish. Gene expression analysis indicates that esrra is expressed in developing pharyngeal arches where genes necessary for cartilage development are also expressed. Loss of function analysis shows that knockdown of esrra impairs expression of genes including sox9, col2a1, sox5, sox6, runx2 and col10a1 thus induces abnormally formed cartilage in pharyngeal arches. Importantly, we identify putative ESRRa binding elements in upstream regions of sox9 to which ESRRa can directly bind, indicating that Esrra may directly regulate sox9 expression. Accordingly, ectopic expression of sox9 rescues defective formation of cartilage induced by the knockdown of esrra. Taken together, our results indicate for the first time that ESRRa is essential for cartilage development by regulating sox9 expression during vertebrate development.
authors.affiliation: Department of Microbiology and Center for Metabolic Function Regulation, Iksan, Jeonbuk, 570-749, South Korea.
authors.forename: Yong-Il
authors.initials: YI
authors.lastname: Kim
authors.affiliation: Department of Microbiology and Center for Metabolic Function Regulation, Iksan, Jeonbuk, 570-749, South Korea.
authors.forename: Joon
authors.initials: J
authors.lastname: No Lee
authors.affiliation: Department of Microbiology and Center for Metabolic Function Regulation, Iksan, Jeonbuk, 570-749, South Korea.
authors.forename: Sushil
authors.initials: S
authors.lastname: Bhandari
authors.affiliation: Department of Microbiology and Center for Metabolic Function Regulation, Iksan, Jeonbuk, 570-749, South Korea.
authors.forename: In-Koo
authors.initials: IK
authors.lastname: Nam
authors.affiliation: Department of Microbiology and Center for Metabolic Function Regulation, Iksan, Jeonbuk, 570-749, South Korea.
authors.forename: Kyeong-Won
authors.initials: KW
authors.lastname: Yoo
authors.affiliation: Department of Microbiology and Center for Metabolic Function Regulation, Iksan, Jeonbuk, 570-749, South Korea.
authors.forename: Se-Jin
authors.initials: SJ
authors.lastname: Kim
authors.affiliation: Department of Microbiology and Center for Metabolic Function Regulation, Iksan, Jeonbuk, 570-749, South Korea.
authors.forename: Gi-Su
authors.initials: GS
authors.lastname: Oh
authors.affiliation: Department of Microbiology and Center for Metabolic Function Regulation, Iksan, Jeonbuk, 570-749, South Korea.
authors.forename: Hyung-Jin
authors.initials: HJ
authors.lastname: Kim
authors.affiliation: Department of Microbiology and Center for Metabolic Function Regulation, Iksan, Jeonbuk, 570-749, South Korea.
authors.forename: Hong-Seob
authors.initials: HS
authors.lastname: So
authors.affiliation: Department of Microbiology and Center for Metabolic Function Regulation, Iksan, Jeonbuk, 570-749, South Korea.|Integrated Omics Institute, Wonkwang University School of Medicine, Iksan, Jeonbuk, 570-749, South Korea.
authors.forename: Seong-Kyu
authors.initials: SK
authors.lastname: Choe
authors.affiliation: Department of Microbiology and Center for Metabolic Function Regulation, Iksan, Jeonbuk, 570-749, South Korea.
authors.forename: Raekil
authors.initials: R
authors.lastname: Park
mesh_terms: D000818:Animals; D001934:Branchial Region / Q000196:embryology; D002356:Cartilage / Q000196:embryology / Q000378:metabolism; D002470:Cell Survival / Q000235:genetics; D019902:Chondrocytes / Q000378:metabolism; D020219:Chondrogenesis / Q000235:genetics; D047108:Embryonic Development / Q000235:genetics; D018507:Gene Expression Regulation, Developmental; D055785:Gene Knockdown Techniques; D009432:Neural Crest / Q000196:embryology; D059372:Nucleotide Motifs; D011485:Protein Binding; D011960:Receptors, Estrogen / Q000235:genetics / Q000378:metabolism*; D020218:Response Elements; D055758:SOX9 Transcription Factor / Q000235:genetics*; D015027:Zebrafish / Q000196:embryology / Q000235:genetics* / Q000378:metabolism*; D000097983:ERRalpha Estrogen-Related Receptor
chemical_list: D011960:Receptors, Estrogen; D055758:SOX9 Transcription Factor; D000097983:ERRalpha Estrogen-Related Receptor