Attenuating inflammation but stimulating both angiogenesis and neurogenesis using hyperbaric oxygen in rats with traumatic brain injury

Kao Chang Lin, Kuo Chi Niu, Kuen Jer Tsai, Jinn Rung Kuo, Liang Chao Wang, Chung Ching Chio, Ching Ping Chang

Research output: Contribution to journalArticlepeer-review

75 Citations (Scopus)


BACKGROUND: Inflammation, angiogenesis, neurogenesis, and gliosis are involved in traumatic brain injury (TBI). Several studies provide evidence supporting the neuroprotective effect of hyperbaric oxygen (HBO 2) therapy in TBI. The aim of this study was to ascertain whether inflammation, angiogenesis, neurogenesis, and gliosis during TBI are affected by HBO 2 therapy. METHODS: Rats were randomly divided into three groups: TBI + NBA (normobaric air: 21% O 2 at 1 absolute atmospheres), TBI + HBO 2, and Sham operation + NBA. TBI + HBO 2 rats received 100% O 2 at 2.0 absolute atmospheres for 1 hr/d for three consecutive days. Behavioral tests and biochemical and histologic evaluations were done 4 days after TBI onset. RESULTS: TBI + NBA rats displayed: (1) motor and cognitive dysfunction; (2) cerebral infarction and apoptosis; (3) activated inflammation (evidenced by increased brain myeloperoxidase activity and higher serum levels of tumor necrosis factor-α); (4) neuronal loss (evidenced by fewer NeuN-positive cells); and (5) gliosis (evidenced by more glial fibrillary protein-positive cells). In TBI + HBO 2 rats, HBO 2 therapy significantly reduced TBI-induced motor and cognitive dysfunction, cerebral infarction and apoptosis, activated inflammation, neuronal loss, and gliosis. In addition, HBO 2 therapy stimulated angiogenesis (evidenced by more bromodeoxyuridine-positive endothelial and vascular endothelial growth factor-positive cells), neurogenesis (evidenced by more bromodeoxyuridine-NeuN double-positive and glial cells-derived neurotrophic factor-positive cells), and overproduction of interleukin-10 (an anti-inflammatory cytokine). CONCLUSIONS: Collectively, these results suggest that HBO 2 therapy may improve outcomes of TBI in rats by inhibiting activated inflammation and gliosis while stimulating both angiogenesis and neurogenesis in the early stage.

Original languageEnglish
Pages (from-to)650-659
Number of pages10
JournalJournal of Trauma and Acute Care Surgery
Issue number3
Publication statusPublished - 2012 Mar

All Science Journal Classification (ASJC) codes

  • Surgery
  • Critical Care and Intensive Care Medicine


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