[Polyamine system in experimental retinopathy of prematurity].

Spermidine (SPD) and spermine (SP) concentrations and the activities of ODC and SAT have been measured in retina and lens of the rats maintained in 60% atmospheric oxygen for the first 14 days life. Hyperoxia, known to cause retardation of vessel growth, was associated with some reduction of the enzyme activities and polyamine levels.