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Skullcapflavone II inhibits osteoclastogenesis by regulating reactive oxygen species and attenuates the survival and resorption function of osteoclasts by modulating integrin signaling
Author(s) -
Lee Jiae,
Son Han Saem,
Lee Hye In,
Lee Gong-Rak,
Jo You-Jin,
Hong Seong-Eun,
Kim Narae,
Kwon Minjeong,
Kim Nam Young,
Kim Hyun Jin,
Lee Yoo Jin,
Seo Eun Kyoung,
Jeong Woojin
Publication year - 2019
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fj.201800866rr
Subject(s) - osteoclast , bone resorption , cathepsin k , rhoa , integrin , resorption , chemistry , reactive oxygen species , microbiology and biotechnology , cancer research , signal transduction , medicine , biology , biochemistry , receptor
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 β 3 , 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. FASEB J. 33, 2026–2036 (2019). www.fasebj.org