Details

Autor(en) / Beteiligte

• Lu, Da-Zhuang
• Dong, Wei
• Feng, Xiao-Jie
• Chen, Hui
• Liu, Juan-Juan
• Wang, Hui
• Zang, Lu-Yang
• Qi, Meng-Chun

Titel

CaMKII(δ) regulates osteoclastogenesis through ERK, JNK, and p38 MAPKs and CREB signalling pathway

Ist Teil von

• Molecular and cellular endocrinology, 2020-05, Vol.508, p.110791-110791, Article 110791

Ort / Verlag

Ireland: Elsevier B.V

Erscheinungsjahr

2020

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• Calcium/calmodulin-dependent protein kinases (CaMKs) are a group of important molecules mediating calcium signal transmission and have been proved to participate in osteoclastogenesis regulation. CaMKII, a subtype of CaMKs is expressed during osteoclast differentiation, but its role in osteoclastogenesis regulation remains controversial. In the present study, we identified that both mRNA and protein levels of CaMKII (δ) were upregulated in a time-dependent manner during osteoclast differentiation. CaMKII (δ) gene silencing significantly inhibited osteoclast formation, bone resorption, and expression of osteoclast-related genes, including nuclear factor of activated T cells c1 (NFATc1), tartrate-resistant acid phosphatase (TRAP), and c-Src. Furthermore, CaMKII (δ) gene silencing downregulated phosphorylation of mitogen-activated protein kinases (MAPKs), including JNK, ERK, and p38, which were transiently activated by RANKL. Specific inhibitors of ERK, JNK, and p38 also markedly inhibited expression of osteoclast-related genes, osteoclast formation, and bone resorption like CaMKII (δ) gene silencing. Additionally, CaMKII (δ) gene silencing also suppressed RANKL-triggered CREB phosphorylation. Collectively, these data demonstrate the important role of CaMKII (δ) in osteoclastogenesis regulation through JNK, ERK, and p38 MAPKs and CREB pathway. •CaMKIIδ expression time-dependently upregulated during osteoclast differentiation.•CaMKIIδ gene silencing inhibits osteoclast formation and specific gene expression.•Phosphorylation of JNK, ERK, p38 MAPKs and CREB decreased by CaMKIIδ gene silencing.•MAPK inhibitors markedly suppress NFATc1 and TRAP expression and osteoclastogenesis.