VITAMIN D AND PREECLAMPSIA: SERUM 25-HIDROXIVITAMIN D IS REDUCED IN EARLY PREECLAMPSIA AND INVERSILY CORRELATED TO ALBUMIN TO CREATININE RATIO
Preeclampsia, vitamin D, biochemical parameters.
Preeclampsia (PE) is a pregnancy-specific disease. It is characterized by hypertension and target-organ injury after 20 weeks of pregnancy. PE’s complications are associated with significant maternal and perinatal mortality and morbidity. Thus, understanding the development of the disease may lead to an early intervention and a more appropriated management of PE, reducing the risks to maternal and fetal/neonatal health. In this regard, there are evidence of the association of vitamin D deficiency, as well, of immunomodulatory process failure may be directly associated to PE development and evolution. Thus, the objective of the present study was to evaluate 25-hidroxivitamin D (25(OH)D) concentration and its correlation with general biochemical parameters in pregnant women with PE. Forty-five pregnant women were included: 25 with severe PE diagnosis (PE group) and 20 normotensives (normotensive group). After signing written informed consent, a fasting blood sample, to evaluate general metabolic biochemical parameters and 25(OH)D; and a first morning urine sample, to determine urinary albumin-to-creatinine (ACR), were collected. Regarding vitamin D evaluation, PE group was divided according to the moment of PE development in early PE group (patients who developed PE before 34th week of pregnancy) and late PE group (patients who developed PE from 34th of pregnancy); and according to the presence (PE + RH group) or not (PE group) of resistant hypertension. Regarding general metabolic status analyses, urea (p<0.001), creatinine (p<0.001), ACR (p<0.001), uric acid (p<0.001), AST (p=0.016), LDH (p=0.002), phosphorous (p=0.046) and magnesium (p<0.001) increased values, as well as, albumin (p<0.001), total protein (p<0.001) and calcium (p<0.001), diminished values, were observed in PE group when compared to the normotensives pregnant. Concerning 25(OH)D quantification, statistically lower values were observed in early PE group when compared to late PE group (p=0.045). No differences were found between the other groups. A negative correlation between 25(OH)D and ACR was also noticed (r=-0.765, p<0.001). In conclusion, there are also evidences that vitamin D may be associated to early PE, as well, as that the lower the 25(OH)D concentration more severe will be the PE.