Chitosan derived chito-oligosaccharides promote osteoblast differentiation and offer anti-osteoporotic potential: Molecular and morphological evidence from a zebrafish model
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Published on: October 18, 2018
Selvaraj Vimalraj1, Dharunya Govindarajan2, Swathi Sudhakar3
1Department of Applied Mechanics and Biomedical Engineering, Indian Institute of Technology-Madras, Chennai 600 036, Tamil Nadu, India; Department of Prosthodontics, Saveetha Dental College and Hospital, Saveetha Institute of Medical and Technical Science (SIMATS), Saveetha University, Chennai 600 077, Tamil Nadu, India.
Abstract:
This study delves into the potential of chito-oligosaccharides (COS) to promote osteoblast differentiation and prevent osteoporosis, utilizing experiments with mouse MSCs and the zebrafish model. The preliminary biocompatibility study affirms the non-toxic nature of COS across various concentrations. In the osteoblast differentiation study, COS enhances ALP activity and calcium deposition at the cellular level. Moreover, COS induces the upregulation of molecular markers, including Runx2, Type I collagen, ALP, osteocalcin, and osteonectin in mouse MSCs. Zebrafish studies further demonstrate COS's anti-osteoporotic effects, showcasing its ability to expedite fin fracture repair, vertebral mineralization, and bone mineralization in dexamethasone-induced osteoporosis models. The scale regenerative study reveals that COS mitigates the detrimental effects of dexamethasone induced osteoclastic activity, reducing TRAP and hydroxyproline levels while elevating the expression of Runx2a MASNA isoform, collagen2α, OC, and ON mRNAs. Additionally, COS enhances calcium and phosphorus levels in regenerated scales, impacting the bone-healthy calcium-to‑phosphorus ratio. The study also suggests that COS modulates the MMP3-Osteopontin-MAPK signaling pathway. Overall, this comprehensive investigation underscores the potential of COS to prevent and treat osteoporosis. Its multifaceted cellular and molecular effects, combined with in vivo bone regeneration and repair, propose that COS may be effective in addressing osteoporosis and related bone disorders. Nonetheless, further research is imperative to unravel underlying mechanisms and optimize clinical applications.
Insights
Chito-oligosaccharides (COS) show promise for preventing and treating osteoporosis by enhancing bone formation and mineralization. Studies in mice and zebrafish confirm COS
Area of Science:
- Biomaterials Science
- Skeletal Biology
- Regenerative Medicine
Background:
- Osteoporosis is a growing global health concern characterized by low bone mass and microarchitectural deterioration.
- Current treatments for osteoporosis have limitations and side effects, necessitating the exploration of novel therapeutic agents.
- Chito-oligosaccharides (COS), derived from chitin, are biocompatible polysaccharides with potential bioactivities.
Purpose of the Study:
- To investigate the efficacy of chito-oligosaccharides (COS) in promoting osteoblast differentiation and preventing osteoporosis.
- To evaluate the effects of COS on bone regeneration and repair in preclinical models.
Main Methods:
- In vitro studies using mouse mesenchymal stem cells (MSCs) to assess osteoblast differentiation markers (ALP activity, calcium deposition, gene expression).
- In vivo studies using zebrafish models to evaluate the effects of COS on bone fracture repair, mineralization, and osteoporosis.
- Analysis of molecular markers, signaling pathways (MMP3-Osteopontin-MAPK), and mineral content in regenerated tissues.
Main Results:
- COS demonstrated non-toxicity and significantly enhanced osteoblast differentiation in mouse MSCs, upregulating key bone formation markers.
- Zebrafish studies showed COS accelerated fin fracture repair, improved vertebral and bone mineralization, and counteracted dexamethasone-induced osteoporosis.
- COS mitigated osteoclast activity, modulated gene expression related to bone formation, and improved the calcium-to-phosphorus ratio in regenerated scales.
Conclusions:
- Chito-oligosaccharides (COS) exhibit significant potential as a therapeutic agent for preventing and treating osteoporosis.
- COS promotes osteoblast differentiation, enhances bone regeneration and repair, and modulates key molecular pathways involved in bone metabolism.
- Further research is warranted to elucidate the precise mechanisms of COS action and optimize its clinical application for bone disorders.
