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Effects of Early Nutrition on Free Radical Formation in VLBW Infants with Respiratory Distress

2nd Department of Pediatrics, Department of Pathophysiology, Semmelweis University of Medicine, Budapest, HUNGARY

View larger version (20K): [in a new window]   Fig. 1. Effect of nutrition on plasma EA/AA ratio plotted against the age. By day 21, all the infants in P group exhibited pathological plasma EA/AA ratio and the majority of this group showed pathological EA/AA ratio already on day seven. Closed circles represent lipid free total parenteral nutrition, closed triangles represent H infants and open circles mark the L group. The dotted line represents the lower limit of EFAD.

View larger version (18K): [in a new window]   Fig. 2. Alteration of plasma vitamin E concentration with aging. Significant difference could be observed between vitamin E supplemented and unsupplemented groups from day seven onwards. Closed circles represent vitamin E supplementation, open ones show nonsupplemented infants. The dotted line stands for the upper limit of vitamin E deficiency.

View larger version (21K): [in a new window]   Fig. 3. Connection between changes of plasma vitamin E/total lipid ratio and aging. Plasma vitamin E/total lipid ratio increased during the course of aging. The dotted line represents 1.9 of normal plasma vitamin E/total lipid ratio. Closed circles represent vitamin E supplementation, open ones show non supplemented infants. **p<0.01.

View larger version (40K): [in a new window]   Fig. 4. Effects of the parameters characterizing vitamin E and essential fatty acid status of preterm infants on plasma TBARS concentrations of red blood cells. Pathological EA/AA ratio alone did not alter plasma TBARS concentration. Vitamin E deficiency significantly elevated plasma TBARS concentration compared to control (p<0.01). Infants with both vitamin E deficiency and with pathological EA/AA ratio exhibited plasma TBARS levels (compared to control p<0.005; compared to the vitamin E deficiency group p<0.05).