title: Effects of hyperbaric oxygen therapy on biochemical and histological parameters of muscle groups in proximity to the distracted rat tibia.
abstract: We investigated the effect of hyperbaric oxygen therapy (HBOT) on rat muscles during tibial distraction osteogenesis (DO) at normal and hyperdistraction rates. Animals in groups 1 and 2 were distracted by 0.5 mm/day and those in groups 3 and 4 by 1 mm/day. Groups 2 and 4 received HBOT during distraction. Group 5 served as control. Superoxide dismutase (SOD; U/g protein), malondialdehyde (nmol/g protein), glutathione (mmol/g protein), and protein levels (g/dl) were determined. SOD was significantly higher in group 2 (4.59 ± 0.97) than in controls (2.19 ± 0.7) (P = 0.0001), and lower in group 4 (3.74 ± 1.70) than in group 2 (P=0.011). Malondialdehyde was significantly higher in group 2 (0.72 ± 0.23) than in controls (0.38 ± 0.10) (P=0.005). Total protein levels were better preserved with HBOT in distracted muscles: group 2 (3.24 ± 0.37) vs. group 1 (1.88 ± 0.60), and group 4 (3.45 ± 0.70) vs. group 3 (2.03 ± 0.75) (both P=0.0001). Numbers of fibres were lower in group 1 (4.88 ± 0.59) than in group 2 (6.07 ± 0.86), and in group 3 (5.13 ± 0.36) than in group 4 (6.14 ± 0.74) (both P=0.001). Numbers of nuclei were higher in group 1 (11.29 ± 2.47) than in group 2 (9.03 ± 1.53) (P=0.04), and in group 3 (12.43 ± 3.32) than in group 4 (9.08 ± 1.58) (P=0.001). Fibres and nuclei with HBOT were similar to those of controls. HBOT decreased the inflammatory cell infiltrate for group 1 (19.8 ± 8.54) vs. group 2 (4.2 ± 2.53) and group 3 (36.54 ± 11.29) vs. group 4 (21.5 ± 9.23) (both P=0.001). HBOT improves the adaptation of distracted muscle by increasing fibres and antioxidants while decreasing inflammation.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Istanbul University, Istanbul, Turkey.
authors.forename: A
authors.initials: A
authors.lastname: Kaynar
authors.affiliation: Department of Biochemistry, Cerrahpaşa Medical Faculty, Istanbul University, Istanbul, Turkey. Electronic address: sabihacivelek@hotmail.com.
authors.forename: S
authors.initials: S
authors.lastname: Civelek
authors.affiliation: Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Istanbul University, Istanbul, Turkey.
authors.forename: Z
authors.initials: Z
authors.lastname: Kasymova
authors.affiliation: Division of Basic Sciences, Faculty of Dentistry, Istanbul University, Istanbul, Turkey.
authors.forename: N
authors.initials: N
authors.lastname: Keklikoglu
authors.affiliation: Department of Underwater and Hyperbaric Medicine, Medical Faculty Istanbul, Istanbul University, Istanbul, Turkey.
authors.forename: S
authors.initials: S
authors.lastname: Toklu
authors.affiliation: Department of Biochemistry, Cerrahpaşa Medical Faculty, Istanbul University, Istanbul, Turkey.
authors.forename: H
authors.initials: H
authors.lastname: Uzun
mesh_terms: D000818:Animals; D015415:Biomarkers / Q000378:metabolism*; D005978:Glutathione / Q000378:metabolism; D006931:Hyperbaric Oxygenation; D008297:Male; D008315:Malondialdehyde / Q000378:metabolism; D023421:Models, Animal; D018482:Muscle, Skeletal / Q000378:metabolism*; D019857:Osteogenesis, Distraction; D011506:Proteins / Q000378:metabolism; D051381:Rats; D017208:Rats, Wistar; D013482:Superoxide Dismutase / Q000378:metabolism; D013977:Tibia / Q000601:surgery*
chemical_list: D015415:Biomarkers; D011506:Proteins; D008315:Malondialdehyde; D013482:Superoxide Dismutase; D005978:Glutathione
keywords: distraction osteogenesis; glutathione; hyperbaric oxygen therapy; malondialdehyde.; muscle; superoxide dismutase