Endogenously produced oxides of nitrogen appear to play important role
s in tissue and organ homeostasis. Endogenous production of nitric oxi
de, which can be altered in response to various stimuli, can modulate
vascular tone, oxyradical cascades, cell adhesion, and other aspects o
f inflammation. Because exogenously administered (inhaled) nitric oxid
e can mediate pulmonary vasodilatation and improve pulmonary function
in some patients with lung injury, treatment df lung allograft recipie
nts with inhaled nitric oxide may ameliorate ischemia-reperfusion inju
ry, thereby improving perioperative pulmonary function and diminishing
ventilatory support requirements. This review examines the biology of
nitric oxide and present data that support its potential therapeutic
effects for lung transplant recipients.