Hyperbaric oxygen therapy is not associated with oxidative stress assessed using plasma F-2-isoprostanes and isofurans

Tomas Corcoran, Sonya Ting, Emilie Mas, Michael Phillips, Edmond O'Loughlin, Anne Barden, Trevor A. Mori

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Background and aims: Hyperbaric oxygen (HBO) therapy is increasingly used in medical practice as a means of enhancing the formation of collagen matrix and angiogenesis, thus promoting healing in wounds and necrotic tissue. However, there are concerns that oxygen can also associate with increased production of oxygen free radicals and oxidative stress. F-2-Isoprostanes (F-2-IsoPs) formed by non-enzymatic oxidation of arachidonic acid (AA) are reliable measures for assessing oxidative stress in vivo. In addition, under conditions of high oxygen tension isofurans (IsoFs) are preferentially formed from AA and are considered to better reflect oxidative stress in the setting of high oxygen tension. This study aimed to measure plasma IsoFs and F-2-IsoP in patients receiving HBO therapy to treat osteonecrosis secondary to radiation therapy. Our hypothesis was that IsoFs would continue to rise with increasing oxygen pressures in contrast to F2-IsoPs whose synthesis would be reduced.

Methods: Twelve patients receiving hyperbaric therapy to treat osteonecrosis secondary to radiation therapy were studied during hyperbaric treatment. Blood samples were collected prior to, during and after cessation of HBO therapy that lasted for 119 min. Seven serial blood samples were collected for measurement of plasma F-2-IsoPs and IsoFs, blood gases and haemoglobin.

Results: Oxygen saturation and venous oxygen partial pressure (PvO(2)) rose significantly during hyperbaric therapy. However, there were no significant changes in plasma IsoFs or F-2-IsoPs during the hyperbaric therapy session.

Conclusion: In this study of patients with osteonecrosis, HBO therapy at a maximum pressure of 2.4 atm with up to 100% oxygen did not worsen oxidative stress assessed using plasma F-2-IsoFs and IsoPs.

Original languageEnglish
Pages (from-to)16-19
Number of pages4
JournalProstaglandins, Leukotrienes & Essential Fatty Acids
Volume127
DOIs
Publication statusPublished - 1 Dec 2017

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