The role of melatonin in bone regeneration: A review of involved signaling pathways

Faezeh Malakoti, Farshad Zare, Reza Zarezadeh, Aydin Raei Sadigh, Alireza Sadeghpour, Maryam Majidinia, Bahman Yousefi, Forough Alemi
In: Biochimie · 2022 · vol. 202 , pp. 56–70 · doi:10.1016/j.biochi.2022.08.008 · PMID:36007758 · W4292977485
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This review examines the involvement of melatonin in bone regeneration and the signaling pathways it influences.

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Abstract

Increasing bone resorption followed by decreasing bone mineralization are hallmarks of bone degeneration, which mostly occurs in the elderly population and post-menopausal women. The use of mesenchymal stem cells (MSCs) has raised many promises in the field of bone regeneration due to their high osteoblastic differentiation capacity and easy availability from abundant sources. A variety of compounds, including growth factors, cytokines, and other internal factors, have been combined with MSCs to increase their osteoblastic differentiation capacity. One of these factors is melatonin, whose possible regulatory role in bone metabolism and formation has recently been suggested by many studies. Melatonin also is a potential signaling molecule and can affect many of the signaling pathways involved in MSCs osteoblastic differentiation, such as activation of PI3K/AKT, BMP/Smad, MAPK, NFkB, Nrf2/HO-1, Wnt, SIRT/SOD, PERK/ATF4. Furthermore, melatonin in combination with other components such as strontium, vitamin D3, and vitamin K2 has a synergistic effect on bone microstructure and improves bone mineral density (BMD). In this review article, we aim to summarize the regulatory mechanisms of melatonin in osteoblastic differentiation of MSCs and underling involved signaling pathways as well as the clinical potential of using melatonin in bone degenerative disorders.

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