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Gastrin-Releasing Peptide (GRP) Stimulates Osteoclastogenesis in Periodontitis by Choi, YunJeong ;Heo, Soon Chul ;Kim, Yu Na ;Joo, Ji-Young ;Hwang, Jae Joon ;Bae, Moon-Kyoung ;Kim, Hyung Joon is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

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Periodontitis is a chronic inflammatory disease with alveolar bone resorption and subsequent tooth loss as its ultimate outcomes. Gastrin-releasing peptide (GRP) is a neuropeptide with growth-stimulatory and tumorigenic properties, and neuropeptides have previously been suggested to play a role in the complex cascade of chemical activity associated with periodontal inflammation. In this study, GRP treatment enhanced the differentiation of bone marrow-derived macrophages (BMMs) into osteoclasts, and gastrin-releasing peptide receptor (GRPR) antagonists suppressed the pro-osteoclastogenic effect of GRP. Grpr-siRNA knockdown resulted in a significantly lower number of osteoclasts formed as compared with the control. Interestingly, gene expression analysis indicated downregulation of Grp and Grpr expressions in BMMs during osteoclastogenesis. Moreover, ligature-induced periodontitis model in mice and gingival samples from patients with periodontitis displayed increased immunostaining of GRP in the oral epithelium. Subsequently, stimulation of mouse primary epithelial cells (ECs) and HaCaT cells, human epidermal keratinocytes, with lipopolysaccharides (LPS) of Porphyromonas gingivalis o

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Author

Choi, YunJeong ;Heo, Soon Chul ;Kim, Yu Na ;Joo, Ji-Young ;Hwang, Jae Joon ;Bae, Moon-Kyoung ;Kim, Hyung Joon

Publisher

MDPI AG

Published

2020

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)