title: The Effect of Estradiol on the Growth Plate Chondrocytes of Limb and Spine from Postnatal Micein vitro: The Role of Estrogen-Receptor and Estradiol Concentration.
abstract: Objectives:Skeletal development is a complex process. Little is known about the different response of limb or spine growth plate chondrocytes (LGP or SGP) to the estrogen level and the role of estrogen receptor (ER) during postnatal stage.Methods:LGP and SGP chondrocytes were isolated from 50 one-week mice and treated with different concentrations of 17β-estradiol. Cell viability was measured by cell counting kit-8 (CCK-8). The expression of collagen II and X were evaluated by real-time PCR and Western blotting. Then, the response of LGP or SGP chondrocyte after with or without estradiol and specific ER antagonists to block the effect of ERs were also measured by Western blotting and immunofluorescence.Results:Estradiol promoted the chondrogensis of the chondrocytes in vitro and achieved the maximal expression of type II collagen at the dose of 10-7M. Additionally, the regulatory effect of estradiol on the chondrogenesis can be mainly relied on ERα. The LGP chondrocytes were more sensitive to the estradiol treatment than SGP in the expression of type II collagen.Conclusions:Estrogen at a pharmacological concentration (10-7M) could stimulate the maximal production of type II collagen in the growth plate chondrocytes in vitro, which exerts its activity mainly through ERα in the chondrogenesis. Furthermore, the LGP chondrocytes were more sensitive to the estradiol treatment than SGP in the chondrogenesis.
authors.affiliation: Department of Orthopaedic Surgery, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200127, P.R.China.
authors.forename: Sheng
authors.initials: S
authors.lastname: Shi
authors.affiliation: Department of Endocrinology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200127, P.R.China.
authors.forename: Shuang
authors.initials: S
authors.lastname: Zheng
authors.affiliation: Department of Orthopaedic Surgery, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200127, P.R.China.
authors.forename: Xin-Feng
authors.initials: XF
authors.lastname: Li
authors.affiliation: Department of Orthopaedic Surgery, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200127, P.R.China.
authors.forename: Zu-De
authors.initials: ZD
authors.lastname: Liu
mesh_terms: D000818:Animals; D015153:Blotting, Western; D002470:Cell Survival / Q000187:drug effects; D002478:Cells, Cultured; D019902:Chondrocytes / Q000187:drug effects* / Q000378:metabolism*; D004958:Estradiol / Q000494:pharmacology*; D005260:Female; D006132:Growth Plate / Q000166:cytology*; D051379:Mice; D008810:Mice, Inbred C57BL; D060888:Real-Time Polymerase Chain Reaction; D011960:Receptors, Estrogen / Q000378:metabolism*; D013131:Spine / Q000166:cytology*
chemical_list: D011960:Receptors, Estrogen; D004958:Estradiol
keywords: estradiol; estrogen receptor.; growth plate chondrocyte; limb; postnatal stage; spine