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Humanin suppresses receptor activator of nuclear factor-κB ligand-induced osteoclast differentiation via AMP-activated protein kinase activation

 Namju Kang  ;  Ki Woo Kim  ;  Dong Min Shin 
 Korean Journal of Physiology & Pharmacology, Vol.23(5) : 411-417, 2019 
Journal Title
 Korean Journal of Physiology & Pharmacology 
Issue Date
AMP-activated protein kinase ; Humanin ; Osteoclastogenesis ; Receptor activator of nuclear factor-κB ; ligand
Humanin (HN) is a mitochondrial peptide that exhibits cytoprotective actions against various stresses and diseases. HN has been shown to induce the phosphorylation of AMP-activated protein kinase (AMPK), which is a negative regulator of receptor activator of nuclear factor-κB ligand (RANKL). However, the role of HN in osteoclastogenesis or other skeletal disorders remains unknown. Here, we examined whether HN regulates osteoclastogenesis via AMPK activation using bone marrow-derived macrophage (BMM) cultures. Our results show that HN inhibited RANKL-induced osteoclast formation and reduced the expression of genes involved in osteoclastogenesis, including nuclear factor of activated T-cells cytoplasmic 1, osteoclast-associated receptor, cathepsin K, and tartrate-resistant acid phosphatase. Moreover, HN increased the levels of phosphorylated AMPK protein; compound C, an AMPK inhibitor, recovered HN-induced osteoclast differentiation. In addition, we found that HN significantly decreased the levels of RANKL-induced reactive oxygen species in BMMs. Therefore, these results indicate that HN plays an important role in osteoclastogenesis and may function as an inhibitor of bone disorders via AMPK activation.
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2. College of Dentistry (치과대학) > Dept. of Oral Biology (구강생물학교실) > 1. Journal Papers
Yonsei Authors
Kim, Ki Woo(김기우) ORCID logo https://orcid.org/0000-0002-7790-1515
Shin, Dong Min(신동민) ORCID logo https://orcid.org/0000-0001-6042-0435
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