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Type: Journal article
Title: The paired-box homeodomain transcription factor Pax6 binds to the upstream region of the TRAP gene promoter and suppresses receptor activator of NF-kB ligand (RANKL)-induced Osteoclast differentiation
Author: Kogawa, M.
Hisatake, K.
Atkins, G.
Findlay, D.
Enoki, Y.
Sato, T.
Gray, P.
Kanesaki-Yatsuka, Y.
Anderson, P.
Wada, S.
Kato, N.
Fukuda, A.
Katayama, S.
Tsujimoto, M.
Yoda, T.
Suda, T.
Okazaki, Y.
Matsumoto, M.
Citation: Journal of Biological Chemistry, 2013; 288(43):31299-31312
Publisher: Amer Soc Biochemistry Molecular Biology Inc
Issue Date: 2013
ISSN: 0021-9258
Statement of
Masakazu Kogawa, Koji Hisatake, Gerald J. Atkins, David M. Findlay, Yuichiro Enoki, Tsuyoshi Sato, Peter C. Gray, Yukiko Kanesaki-Yatsuka, Paul H. Anderson, Seiki Wada, Naoki Kato, Aya Fukuda, Shigehiro Katayama, Masafumi Tsujimoto, Tetsuya Yoda, Tatsuo Suda, Yasushi Okazaki, and Masahito Matsumoto
Abstract: Osteoclast formation is regulated by balancing between the receptor activator of nuclear factor-κB ligand (RANKL) expressed in osteoblasts and extracellular negative regulatory cytokines such as interferon-γ (IFN-γ) and interferon-β (IFN-β), which can suppress excessive bone destruction. However, relatively little is known about intrinsic negative regulatory factors in RANKL-mediated osteoclast differentiation. Here, we show the paired-box homeodomain transcription factor Pax6 acts as a negative regulator of RANKL-mediated osteoclast differentiation. Electrophoretic mobility shift and reporter assays found that Pax6 binds endogenously to the proximal region of the tartrate acid phosphatase (TRAP) gene promoter and suppresses nuclear factor of activated T cells c1 (NFATc1)-induced TRAP gene expression. Introduction of Pax6 retrovirally into bone marrow macrophages attenuates RANKL-induced osteoclast formation. Moreover, we found that the Groucho family member co-repressor Grg6 contributes to Pax6-mediated suppression of the TRAP gene expression induced by NFATc1. These results suggest that Pax6 interferes with RANKL-mediated osteoclast differentiation together with Grg6. Our results demonstrate that the Pax6 pathway constitutes a new aspect of the negative regulatory circuit of RANKL-RANK signaling in osteoclastogenesis and that the augmentation of Pax6 might therefore represent a novel target to block pathological bone resorption.
Keywords: Differentiation
Gene Regulation
Transcription Factors
Rights: © 2013 by The American Society for Biochemistry and Molecular Biology, Inc.
DOI: 10.1074/jbc.M113.461848
Appears in Collections:Aurora harvest
Orthopaedics and Trauma publications

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