17β-estradiol regulates the differentiation of cementoblasts via Notch signaling cascade.
Estrogen has been well recognized as a key factor in the homeostasis of bone and periodontal tissue, but the way it regulates the activities of cementoblasts, the cell population maintaining cementum has not been fully understood. In this study, we examined the expression of estrogen receptor in OCCM-30 cells and the effect of 17β-estradiol (E2) on the proliferation and differentiation of OCCM-30 cells. We found that both estrogen receptor α and β were expressed in OCCM-30 cells. E2 exerted no significant influence on the proliferation of OCCM-30 cells, but inhibited the transcription and translation of BSP and Runx2 in the early phase of osteogenic induction except the BSP mRNA. Afterwards in the late phase of osteogenic induction, E2 enhanced the transcription and translation of BSP and Runx2 and promoted the calcium deposition. In addition, the expression level of Notch1, NICD and Hey1 mRNAs responded to exogenous E2 in a pattern similar to that of the osteoblastic markers. DAPT could attenuate the effect of E2 on the expression of osteoblastic markers. These findings indicated that E2 might regulate the differentiation of cementoblasts via Notch signaling.
Department of Orthodontics, The State Key Laboratory of Oral Disease, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan Province, China.
Jing
J
Liao
Department of Orthodontics, The State Key Laboratory of Oral Disease, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan Province, China.
Zeyuan
Z
Zhou
Department of Orthodontics, The State Key Laboratory of Oral Disease, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan Province, China.
Li
L
Huang
Department of Orthodontics, The State Key Laboratory of Oral Disease, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan Province, China.
Yuyu
Y
Li
Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan Province, China.
Jingtao
J
Li
Department of Orthodontics, The State Key Laboratory of Oral Disease, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan Province, China. Electronic address: drzsj@scu.edu.cn.
Shujuan
S
Zou
D000818:Animals; D002454:Cell Differentiation / Q000187:drug effects*; D002461:Cell Line, Transformed; D049109:Cell Proliferation / Q000187:drug effects; D003739:Dental Cementum / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D004958:Estradiol / Q000494:pharmacology*; D047628:Estrogen Receptor alpha / Q000378:metabolism; D047629:Estrogen Receptor beta / Q000378:metabolism; D051379:Mice; D051880:Receptors, Notch / Q000378:metabolism*; D015398:Signal Transduction / Q000187:drug effects*
D047628:Estrogen Receptor alpha; D047629:Estrogen Receptor beta; D051880:Receptors, Notch; D004958:Estradiol
Bone sialoprotein; Cementoblast; Estrogen; Notch; Runx2