Functional regulation of osteoblastic MC3T3E-1 cells by hyperbaric oxygen treatment

Masato Kaku; Jin Izumino; Taeko Yamamoto; Yuka Yashima; Saiji Shimoe; Kotaro Tanimoto

doi:10.1016/j.archoralbio.2022.105410

Functional regulation of osteoblastic MC3T3E-1 cells by hyperbaric oxygen treatment

Arch Oral Biol. 2022 Jun:138:105410. doi: 10.1016/j.archoralbio.2022.105410. Epub 2022 Mar 15.

Authors

Masato Kaku¹, Jin Izumino², Taeko Yamamoto², Yuka Yashima², Saiji Shimoe³, Kotaro Tanimoto²

Affiliations

¹ Department of Anatomy and Functional Restorations, Division of Oral Health Sciences, Hiroshima University Graduate School of Biomedical Sciences, Hiroshima, Japan. Electronic address: mkaku@hiroshima-u.ac.jp.
² Department of Orthodontics and Craniofacial Developmental Biology, Hiroshima University Graduate School of Biomedical Sciences, Hiroshima, Japan.
³ Department of Anatomy and Functional Restorations, Division of Oral Health Sciences, Hiroshima University Graduate School of Biomedical Sciences, Hiroshima, Japan.

PMID: 35305478
DOI: 10.1016/j.archoralbio.2022.105410

Abstract

Objectives: The purpose of the present study was to examine the influence of hyperbaric oxygen (HBO) on the function of osteoblastic MC3T3-E1 cells.

Design: Murine MC3T3-E1 cells were exposed to HBO treatment (at 2.5 absolute atmospheric pressure with 100% oxygen, 90 min per day) for 28 days. Alkaline phosphatase (ALP) staining, activity, and calcium (Ca) content were measured. Gene expression of vascular endothelial growth factor (VEGF), basic fibroblast growth factor (bFGF), hypoxia-inducible factor-1α (HIF-1α), type 1 collagen (COL1), and osteocalcin (OCN) was assessed using real-time quantitative polymerase chain reaction after a single HBO exposure for 1.5, 6, and 12 h. Furthermore, adenosine triphosphate (ATP) levels were measured using a luminescent cell viability assay.

Results: ALP activity and Ca content were higher in the HBO group compared to those in the control group. Gene expression of bFGF, COL1, and OCN was upregulated in the HBO group; however, that of VEGF and HIF-1α significantly decreased in the HBO group in comparison with that in the control group. ATP levels were significantly higher in the HBO group compared to those in the control group.

Conclusions: These findings suggest that HBO accelerates bone formation by increasing the ATP levels of osteoblasts, and bFGF can act as a substitute for VEGF in vascularization by HBO application.

Keywords: HIF-1α; Hyperbaric oxygen treatment; VEGF; bFGF.

MeSH terms

Adenosine Triphosphate
Animals
Hyperbaric Oxygenation*
Mice
Oxygen
Vascular Endothelial Growth Factor A / metabolism

Substances

Vascular Endothelial Growth Factor A
Adenosine Triphosphate
Oxygen