1. Academic Validation
  2. Skullcapflavone II inhibits osteoclastogenesis by regulating reactive oxygen species and attenuates the survival and resorption function of osteoclasts by modulating integrin signaling

Skullcapflavone II inhibits osteoclastogenesis by regulating reactive oxygen species and attenuates the survival and resorption function of osteoclasts by modulating integrin signaling

  • FASEB J. 2019 Feb;33(2):2026-2036. doi: 10.1096/fj.201800866RR.
Jiae Lee 1 Han Saem Son 1 Hye In Lee 1 Gong-Rak Lee 1 You-Jin Jo 1 Seong-Eun Hong 1 Narae Kim 1 Minjeong Kwon 1 Nam Young Kim 1 Hyun Jin Kim 1 Yoo Jin Lee 2 Eun Kyoung Seo 2 Woojin Jeong 1
Affiliations

Affiliations

  • 1 Department of Life Science, Research Center for Cellular Homeostasis, Ewha Womans University, Seoul, South Korea.
  • 2 College of Pharmacy, Ewha Womans University, Seoul, South Korea.
Abstract

Many bone diseases, such as osteoporosis and rheumatoid arthritis, are attributed to an increase in osteoclast number or activity; therefore, control of osteoclasts has significant clinical implications. This study shows how skullcapflavone II (SFII), a flavonoid with anti-inflammatory activity, regulates osteoclast differentiation, survival, and function. SFII inhibited osteoclastogenesis with decreased activation of MAPKs, Src, and cAMP response element-binding protein (CREB), which have been known to be redox sensitive. SFII decreased Reactive Oxygen Species by scavenging them or activating nuclear factor-erythroid 2-related factor 2 (Nrf2), and its effects were partially reversed by hydrogen peroxide cotreatment or Nrf2 deficiency. In addition, SFII attenuated survival, migration, and bone resorption, with a decrease in the expression of Integrin β3, Src, and p130 Crk-associated substrate, and the activation of RhoA and Rac1 in differentiated osteoclasts. Furthermore, SFII inhibited osteoclast formation and bone loss in an inflammation- or ovariectomy-induced osteolytic mouse model. These findings suggest that SFII inhibits osteoclastogenesis through redox regulation of MAPKs, Src, and CREB and attenuates the survival and resorption function by modulating the Integrin pathway in osteoclasts. SFII has therapeutic potential in the treatment and prevention of bone diseases caused by excessive osteoclast activity.-Lee, J., Son, H. S., Lee, H. I., Lee, G.-R., Jo, Y.-J., Hong, S.-E., Kim, N., Kwon, M., Kim, N. Y., Kim, H. J., Lee, Y. J., Seo, E. K., Jeong, W. Skullcapflavone II inhibits osteoclastogenesis by regulating Reactive Oxygen Species and attenuates the survival and resorption function of osteoclasts by modulating Integrin signaling.

Keywords

Nrf2; Rho GTPase; bone resorption.

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