Hyperbaric oxygen and lymphoid system function: a review supporting possible intervention in tissue transplantation

Area of Science:

• Immunology
• Transplantation Science
• Hyperbaric Medicine

Background:

• Allograft transplant rejection involves complex immune responses, including lymphoid system reactions and lymphoid-independent damage.
• Proinflammatory cytokines and cellular elements like CD4 cells and macrophages contribute to transplant rejection.
• Reperfusion injury and tissue ischemia are significant challenges in transplantation.

Purpose of the Study:

• To review the immunomodulatory effects of hyperbaric oxygen (HBO2) in the context of allograft transplantation.
• To explore the potential of HBO2 as an adjunct therapy for preserving transplanted tissues.
• To summarize HBO2's impact on immune reactions and tissue viability relevant to transplantation.

Main Methods:

• Review of existing literature on hyperbaric oxygen therapy and its effects on immune responses.
• Analysis of HBO2's impact on cellular immunity, cytokine production, and immune complexes.
• Examination of studies involving HBO2 in various tissue and organ transplantation models.

Main Results:

• HBO2 demonstrates immunosuppressive effects, including decreased IL-1 and CD4 cell production, and increased CD8 cell counts.
• HBO2 normalizes cell-bound immunity, reduces immune complexes, and alters MHC class I expression.
• HBO2 has been successfully applied in diverse transplantation scenarios, improving tissue oxygenation and reducing damage.

Conclusions:

• HBO2 exhibits significant immunomodulatory properties beneficial for mitigating transplant rejection.
• HBO2 enhances tissue oxygenation, reduces oxidative stress, and promotes wound healing, supporting graft viability.
• HBO2 presents a promising adjunctive therapy for improving outcomes in transplantation recipients.