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

Jiae Lee, Han Saem Son, Hye In Lee, Gong Rak Lee, You Jin Jo, Seong Eun Hong, Narae Kim, Minjeong Kwon, Nam Young Kim, Hyun Jin Kim, Yoo Jin Lee, Eun Kyoung Seo, Woojin Jeong

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

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 b3, 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.

Original languageEnglish
Pages (from-to)2026-2036
Number of pages11
JournalFASEB Journal
Volume33
Issue number2
DOIs
StatePublished - 2019

Keywords

  • Bone resorption
  • Nrf2
  • Rho GTPase

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