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Updated: Jan 19, 2026
Osteoclast Derivation from Mouse Bone Marrow
Published on: November 6, 2014
Activation of Dusp14 protects against osteoclast generation and bone loss by regulating AMPKα-dependent manner
Lei Hong1, Jiangbo Ai2, Danian Ma3
1Department of Orthopedic Surgery, First Affiliated Hospital of PLA General Hospital, Beijing, 100048, China.
Abstract:
Osteoporosis is a progressive systematic skeletal disorder featured by decreased bone and enhanced risk of fracture due to an uncoupling of bone resorption. Chronic inflammatory response plays an essential role in osteoporosis progression. Unfortunately, the pathogenesis that contributes to osteoporosis still remains unclear. Dual-specificity phosphatase 14 (Dusp14, also known as MKP6) is a MAP kinase phosphatase, and has important roles in regulating various cellular processes. In the study, we attempted to explore the effects of Dusp14 on osteoporosis development. The results indicated that Dusp14 expression was decreased during osteoclast differentiation and that Dusp14 over-expression markedly alleviated osteoclast generation regulated by macrophage colony-stimulating factor (M-CSF) and receptor activator of NF-κB ligand (RANKL). In M-CSF/RANKL-treated bone marrow-derived cells (BMMs), promoting Dusp14 expression significantly alleviated inflammation and apoptosis by suppressing nuclear factor (NF)-κB and Caspase-3 signaling pathways, respectively. Furthermore, AMP-activated protein kinase (AMPK)-α activation was markedly increased by Dusp14 over-expression in M-CSF/RANKL-incubated BMMs. Importantly, we found that AMPKα blockage obviously abolished the role of Dusp14 in preventing osteoclasts differentiation at least partly via elevating M-CSF/RANKL-elicited inflammation and apoptosis. In vivo, magnesium silicate-induced inflammatory osteoporosis was obviously alleviated in Dusp14 transgenic (TG) mice. Taken together, we defined Dusp14 as an important molecular switch resulting in osteoporosis through an AMPKα-dependent manner.
Insights
Dual-specificity phosphatase 14 (Dusp14) acts as a key regulator in osteoporosis. Overexpressing Dusp14 inhibits osteoclast formation and inflammation, offering a potential therapeutic target for bone loss.
Area of Science:
- Molecular biology
- Cell biology
- Biochemistry
Background:
- Osteoporosis is a skeletal disorder characterized by reduced bone mass and increased fracture risk, often linked to chronic inflammation.
- The precise molecular mechanisms driving osteoporosis pathogenesis remain incompletely understood.
- Dual-specificity phosphatase 14 (Dusp14), a MAP kinase phosphatase, regulates cellular processes, but its role in bone metabolism is unclear.
Purpose of the Study:
- To investigate the role of Dusp14 in the development of osteoporosis.
- To elucidate the molecular pathways through which Dusp14 influences osteoclast differentiation and inflammatory responses.
Main Methods:
- Examined Dusp14 expression during osteoclast differentiation in vitro.
- Overexpressed Dusp14 in bone marrow-derived cells (BMMs) treated with M-CSF and RANKL.
- Assessed the impact of Dusp14 on inflammatory markers (NF-κB) and apoptosis (Caspase-3).
- Investigated the involvement of AMP-activated protein kinase (AMPK)-α signaling.
- Utilized Dusp14 transgenic (TG) mice to study magnesium silicate-induced inflammatory osteoporosis in vivo.
Main Results:
- Dusp14 expression decreased during osteoclast differentiation.
- Dusp14 overexpression suppressed osteoclastogenesis, inflammation (NF-κB pathway), and apoptosis (Caspase-3 pathway) in M-CSF/RANKL-treated BMMs.
- Dusp14 overexpression upregulated AMPK-α activation.
- AMPK-α inhibition reversed the protective effects of Dusp14 against osteoclast differentiation, inflammation, and apoptosis.
- Dusp14 TG mice showed alleviated magnesium silicate-induced inflammatory osteoporosis.
Conclusions:
- Dusp14 plays a critical role in regulating osteoporosis by inhibiting osteoclast differentiation, inflammation, and apoptosis.
- Dusp14 exerts its effects through an AMPK-α-dependent mechanism.
- Dusp14 functions as a molecular switch in osteoporosis development, highlighting its potential as a therapeutic target.
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