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Brook, I. et al.

Therapies for radiation injuries: research perspectives.

Exposure to radiation damages the immune, hematopoietic, and gastrointestinal components of the host defense system. This may lead to serious endogenous or exogenous infections. When radiation injury is combined with other physical trauma, e.g., burn or wound, the resulting damage to these systems is synergistic, and treatment for infection requires multiple approaches. This paper reviews successful single and combined therapeutic modalities for infections in irradiated mice and irradiated mice inflicted with trauma that are currently conducted at the Armed Forces Radiobiology Research Institute. The models of endogenous and exogenous infection and combined injury are described. The management of wounds infected with bacteria, exogenous systemic infection due to gram-negative enteric bacteria, and the chemoprophylaxis of enteric-derived systemic infection with quinolones is described. Infections can be treated successfully with proper antimicrobial therapy. In gamma- and neutron-irradiated mice, the immunomodulator trehalose dimycolate (TDM) was effective in treating endogenous infection. TDM with the antimicrobial ceftriaxone was effective in treating exogenous infection due to Klebsiella pneumoniae. Improvement in managing infection in irradiated and injured hosts will require further research using these diagnostic and therapeutic modalities. Accurate biological dosimetry is critical in determining if victims are at risk of developing infection. We found that radiation induced changes in plasma diamine oxidase activity; monitoring these changes was a useful indicator of the severity of radiation injury.[1]

References

Therapies for radiation injuries: research perspectives. Brook, I., Ledney, G.D., Madonna, G.S., DeBell, R.M., Walker, R.I. Military medicine. (1992) [Pubmed]

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