1. Academic Validation
  2. Kisspeptin-10 (KP-10) stimulates osteoblast differentiation through GPR54-mediated regulation of BMP2 expression and activation

Kisspeptin-10 (KP-10) stimulates osteoblast differentiation through GPR54-mediated regulation of BMP2 expression and activation

  • Sci Rep. 2018 Feb 1;8(1):2134. doi: 10.1038/s41598-018-20571-2.
Hyo-Eun Son 1 2 Kyeong-Min Kim 1 2 Eun-Jung Kim 3 4 Won-Gu Jang 5 6
Affiliations

Affiliations

  • 1 Department of Biotechnology, School of Engineering, Daegu University, Gyeongbuk, 38453, Republic of Korea.
  • 2 Research Institute of Anti-Aging, Daegu University, Gyeongbuk, 38453, Republic of Korea.
  • 3 Research Institute of Anti-Aging, Daegu University, Gyeongbuk, 38453, Republic of Korea. ejkim4164@knu.ac.kr.
  • 4 Department of Immunology, Kyungpook National University School of Medicine, Daegu, 41944, Republic of Korea. ejkim4164@knu.ac.kr.
  • 5 Department of Biotechnology, School of Engineering, Daegu University, Gyeongbuk, 38453, Republic of Korea. jangwg@daegu.ac.kr.
  • 6 Research Institute of Anti-Aging, Daegu University, Gyeongbuk, 38453, Republic of Korea. jangwg@daegu.ac.kr.
Abstract

Kisspeptin-10 (KP-10) acts as a tumor metastasis suppressor via its receptor, G-protein-coupled receptor 54 (GPR54). The KP-10-GPR54 system plays an important role in embryonic kidney development. However, its function in osteoblast differentiation is unknown. Osteoblast differentiation is controlled by a range of Hormones and cytokines, such as bone morphogenetic protein (BMPs), and multiple transcription factors, such as Runt-related transcription factor 2 (Runx2), Alkaline Phosphatase (ALP), and Distal-less homeobox 5 (Dlx5). In the present study, KP-10-treatment significantly increased the expression of osteogenic genes, including mRNA and protein levels of BMP2, in C3H10T1/2 cells. Moreover, KP-10 induced BMP2-luc activity and increased phosphorylation of Smad1/5/9. In addition, NFATc4 specifically mediated KP-10-induced BMP2 gene expression. However, KP-10 treatment did not induce expression of the BMP2 and Runx2 genes in GPR54-/- cells. To examine whether KP-10 induced secretion of BMP2 to the culture medium, we used the conditioned-medium (C.M) of KP-10 treated medium on C3H10T1/2 cells. Dlx5 and Runx2 expressions were higher in GPR54-/- cells treated with C.M than in those treated with KP-10. These results demonstrate that BMP2 protein has an autocrine effect upon KP-10 treatment. Taken together, these findings suggest that KP-10/GPR54 signaling induces osteoblast differentiation via NFATc4-mediated BMP2 expression.

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