Association between placental vitamin D receptor expression and cord blood vitamin D level and its effect on the birth weight of newborns

Background: Vitamin D deficiency during pregnancy affects fetal growth and development. The present study explored the association between vitamin D levels in cord blood and placental vitamin D receptor expression.Methods: A total of 54 subjects with live-born singleton deliveries were included in SRM Medical College Hospital and Research Centre, Kattankulathur, India. Cord blood and placenta was obtained at the time of delivery.      Results: The mean newborn vitamin D level was 20.07 ng/mL (13-27.50). The mean of relative vitamin D receptor (VDR) expression was 1.45Ct (range 0.10-2.6). Mean comparison of cord serum 25(OH) D3 and VDR revealed significant at p<0.05 by student’s t-test. The newborn anthropometric measurement of head circumference 31.44±3.99 cm, Chest circumference 28.88±4.30 cm, Body length 45.52±8.05 cm, Birth weight 2660.61±353.27 g had significant association with mean VDR expression at p <0.05 level by student t-test analysis. Further, Pearson correlation coefficient also revealed strong positive correlation of placental VDR and cord serum vitamin D (r=0.853, p <0.05).Conclusions: The present study indicates that there was a high prevalence of vitamin D deficiency in the south Indian newborns and the study suggested that VDR had crucial role in maternal to fetal nutrient transfer mechanism. Vitamin D status in cord blood is associated with the birth weight of newborns. Hence, Vitamin D levels during gestation may affect fetal growth and development

Correlation between maternal and neonatal blood vitamin D levels and its effect on the newborn anthropometry

Background: Vitamin D deficiency during pregnancy has important implications for the new born and infant. In India, there were few data about the prevalence of hypovitaminosis D in pregnancy and in new-born and its correlation. Hence, this study aim was to determine vitamin D deficiency in pregnant women and their new-borns and to assess the correlation between maternal and new born serum levels of the vitamin D3 and also to study its effect on the newborn anthropometry.Methods: This cross-sectional, hospital based study was conducted with 54 consecutive women in labour presenting with a singleton term pregnancy at a large tertiary centre in Tamilnadu, India. Data were recorded on a special form and 25-hydroxy vitamin D3 was assessed before delivery in mothers and after delivery in their infant’s umbilical cord blood.Results: The mean vitamin D levels were 20.21 ng/mL for the participants and 20.07 ng/mL for the newborns. Vitamin D severe deficiency was noted in 3 (6%), deficiency 31 (57%), insufficiency 12 (22%) and sufficiency in 8 (15%) of 54 participants whereas severe deficiency, insufficiency and sufficiency respectively, were noted in 4 (7%), 30 (56%), 11 (20%) and 9 (17%) of the newborns. Maternal vitamin D level significantly associated with socioeconomic status, term of delivery and type of delivery respectively were p=0.000, p=0.000 and p=0.038 whereas age (p=0.081), BMI (p=0.085) and parity (p=0.038) was not significant at p <0.05 level by chi-square analysis. Similarly, the new born characteristics of birth weight (p=0.000), birth length (p=0.016), head and chest circumference (p=0.001, p=0.000) exists significant association at p<0.05 level by analysis of variance (ANOVA) method and also there was a strong positive correlation between the vitamin D levels in maternal and cord blood (r=0.898; P <0.05).Conclusions: There was a high prevalence of vitamin D deficiency in the south Indian pregnant women and their newborns. Vitamin D deficiency increased the risk of low birth weight neonate and it also had an effect on the length of the baby, head circumference and chest circumference. This public health problem needs urgent attention

Hydrothermal liquefaction of lignocellulosic biomass for production of biooil and by-products

In this chapter, the current state of the art for hydrothermal liquefaction (HTL) of lignocellulosic biomass is discussed in detail. Lignocellulosic biomass is a promising alternative to fossil fuels for the production of energy and chemicals due to its sustainability and abundance. In recent decades, extensive research has been applied to various thermochemical technologies to convert lignocellulosic biomass into value-added products. Among different technologies, HTL is considered to be one of the most effective methods for producing biofuels and bio-based chemicals from lignocellulosic biomass. The primary by-products of the HTL process include (1) biooil, (2) biochar, (3) gas, and (4) aqueous crude. Currently, only a few HTL processes have been expanded from laboratory to industrial scale. The status of the studies on the HTL of lignocellulosic biomass is critically reviewed in this chapter. In particular, the effect of HTL on the biooil production from biomass has been discussed briefly. © 2022 Elsevier Inc. All rights reserved

Association between placental vitamin D receptor expression and cord blood vitamin D level and its effect on the birth weight of newborns

Background: Vitamin D deficiency during pregnancy affects fetal growth and development. The present study explored the association between vitamin D levels in cord blood and placental vitamin D receptor expression.Methods: A total of 54 subjects with live-born singleton deliveries were included in SRM Medical College Hospital and Research Centre, Kattankulathur, India. Cord blood and placenta was obtained at the time of delivery.      Results: The mean newborn vitamin D level was 20.07 ng/mL (13-27.50). The mean of relative vitamin D receptor (VDR) expression was 1.45Ct (range 0.10-2.6). Mean comparison of cord serum 25(OH) D3 and VDR revealed significant at p&lt;0.05 by student’s t-test. The newborn anthropometric measurement of head circumference 31.44±3.99 cm, Chest circumference 28.88±4.30 cm, Body length 45.52±8.05 cm, Birth weight 2660.61±353.27 g had significant association with mean VDR expression at p &lt;0.05 level by student t-test analysis. Further, Pearson correlation coefficient also revealed strong positive correlation of placental VDR and cord serum vitamin D (r=0.853, p &lt;0.05).Conclusions: The present study indicates that there was a high prevalence of vitamin D deficiency in the south Indian newborns and the study suggested that VDR had crucial role in maternal to fetal nutrient transfer mechanism. Vitamin D status in cord blood is associated with the birth weight of newborns. Hence, Vitamin D levels during gestation may affect fetal growth and development

Correlation between maternal and neonatal blood vitamin D levels and its effect on the newborn anthropometry

Background: Vitamin D deficiency during pregnancy has important implications for the new born and infant. In India, there were few data about the prevalence of hypovitaminosis D in pregnancy and in new-born and its correlation. Hence, this study aim was to determine vitamin D deficiency in pregnant women and their new-borns and to assess the correlation between maternal and new born serum levels of the vitamin D3 and also to study its effect on the newborn anthropometry.Methods: This cross-sectional, hospital based study was conducted with 54 consecutive women in labour presenting with a singleton term pregnancy at a large tertiary centre in Tamilnadu, India. Data were recorded on a special form and 25-hydroxy vitamin D3 was assessed before delivery in mothers and after delivery in their infant’s umbilical cord blood.Results: The mean vitamin D levels were 20.21 ng/mL for the participants and 20.07 ng/mL for the newborns. Vitamin D severe deficiency was noted in 3 (6%), deficiency 31 (57%), insufficiency 12 (22%) and sufficiency in 8 (15%) of 54 participants whereas severe deficiency, insufficiency and sufficiency respectively, were noted in 4 (7%), 30 (56%), 11 (20%) and 9 (17%) of the newborns. Maternal vitamin D level significantly associated with socioeconomic status, term of delivery and type of delivery respectively were p=0.000, p=0.000 and p=0.038 whereas age (p=0.081), BMI (p=0.085) and parity (p=0.038) was not significant at p &lt;0.05 level by chi-square analysis. Similarly, the new born characteristics of birth weight (p=0.000), birth length (p=0.016), head and chest circumference (p=0.001, p=0.000) exists significant association at p&lt;0.05 level by analysis of variance (ANOVA) method and also there was a strong positive correlation between the vitamin D levels in maternal and cord blood (r=0.898; P &lt;0.05).Conclusions: There was a high prevalence of vitamin D deficiency in the south Indian pregnant women and their newborns. Vitamin D deficiency increased the risk of low birth weight neonate and it also had an effect on the length of the baby, head circumference and chest circumference. This public health problem needs urgent attention