Background:
Neonatal hypoxic ischemic encephalopathy (HIE) is a potentially devastating
disorder associated with significant mortality and long-term morbidity.
Objective:
The aim of this study was to study the role of vitamin D as an adjuvant therapy for management
of neonatal HIE.
Patients and Methods:
This study was carried out on 60 neonates with HIE grade II who were diagnosed
according to modified Sarnat staging and were divided in to 2 groups: Group I: Included 30
neonates with Sarnat grade II HIE who received single daily oral dose of vitamin D3 (1000 IU) for 2
weeks in addition to daily subcutaneous (SC) human recombinant erythropoietin (2500 IU/kg) for 5
days and IM or IV magnesium sulphate 250 mg/kg within half an hour of birth, and subsequently 125
mg/kg at 24 and 48 hours of life. Group II: Included 30 neonates with HIE grade II who received
erythropoietin and magnesium sulphate as group I but without vitamin D. Two blood samples were
taken from all neonates included in both groups; the 1st at diagnosis and the 2nd after 2 weeks of therapy.
This study included also 30 healthy neonates as a control group. All neonates included in this
study were subjected to: complete clinical examination with assessment of Apgar score at 5 and 10
minutes, measurement of arterial blood gases and serum 25 (OH) vitamin D, calcium, phosphorus,
S100-B and IL-17 levels.
Results:
Before therapy, there were no significant differences between group I and II in PH, PO2 and
PCO2 (p= 0.294, 0.462, 0.758 respectively), but after 2 weeks of therapy, there were significantly
higher PH levels in group I compared with group II (p <0.001) while there were no significant differences
between group I and II regarding PO2 and PCO2. Before therapy, there were no significant differences
in serum 25(OH) vitamin D levels between group I and II while there were significantly lower
serum 25(OH) vitamin D levels in group I and II compared with controls (P1; comparison between
group I and II = 0.742, P2; comparison between group I and controls = 0.001 and P3; comparison between
group II and controls = 0. 001). There were no significant differences between group I and II
and between group I and II and control as regard serum calcium (P1= 0.943, P2= 0.875 and P3= 0.764)
and phosphorus (P1= 0.862, P2= 0.921, P3= 0.786). There were no significant differences between
group I and II regarding serum IL-17 levels while there were significantly lower serum IL-17 levels in
group I and II compared with controls (P1 = 0.457, P2 = 0.043 and P3 = 0.023). Before therapy, there
were no significant differences in serum S100-B levels between group I and II while there were significantly
higher serum S100-B levels in group I and II compared with control (P1 = 0.381, P2 = 0.001
and P3= 0.001) but after therapy, there were significantly higher S100-B levels in group II compared
with group I and significantly higher S100-B levels in group I and II compared with control (P1=
0.001, P2= 0.043, P3 = 0.001). There were significant negative correlations in group I between serum
S100-B and PH and between S100-B and serum vitamin D before and after therapy.
Conclusion:
Vitamin D was found to improve the cases of group I as demonstrated by the reduction of
serum S100-B levels after vitamin D therapy.
Recommendations:
Extensive multicenter studies are required on a large number of patients with Sarnat
grade II HIE with longer duration of follow up to give valid recommendations about the use of
vitamin D as an adjuvant therapy in Sarnat grade II HIE.