Abstract
Offspring of diabetes patients may suffer from tissue iron deficiency. Erythrocyte zinc protoporphyrin/heme (ZnPP/H) ratios measure impaired iron status. The aim of the study was to examine whether cord ZnPP/H ratios were associated with pregnancy glycemic control. ZnPP/H was measured in cord blood from 31 pregnancies with insulin-treated diabetes (diabetes group) and compared to population normal values. Maternal glycemic control was assessed by daily glucose log, glycosylated hemoglobin and birth weight. Median cord ZnPP/H was higher in the diabetes group than the population normal values (106 (65.2 to 146.8) microM/M vs 68.2 (37.6 to 98.8) micro/M, P < 0.0001). Ratios were directly correlated to surrogates of control (glycosylated hemoglobin, P = 0.05, and birth weight, P < 0.04). Cord ZnPP/H ratios from pregnancies with pre-existing and gestational diabetes were similar. Because cord ZnPP/H was higher in large offspring of diabetic pregnancy, it might identify greater iron utilization for fetal erythropoiesis.
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