Serum Retinol Levels Research Articles

8290 Hypervitaminosis A Induced Severe Hypercalcemia In A Patient With Cirrhosis

Abstract Disclosure: N. Vennelaganti: None. S. Vennelaganti: None. R.L. Fitzgerald: None. K.C. McCowen: None. Introduction The liver stores vitamin A in hepatic stellate cells and regulates its absorption through bile production and distribution via retinol-binding protein 4 and transthyretin synthesis. Cirrhosis compromises these functions, resulting in vitamin A deficiency, which is inversely linked to the severity of nonalcoholic steatohepatitis. Addressing this deficiency in chronic liver diseases, particularly cirrhosis, is challenging due to the risk of vitamin A toxicity. This case describes a cirrhotic patient who developed hypervitaminosis A, leading to severe hypercalcemia. Clinical Case A 54-year-old male with alcoholic cirrhosis was diagnosed with hypovitaminosis A. He was prescribed 10,000 IU of vitamin A due to a low serum retinol level of less than 0.06 mg/L (reference range: 0.3-1.2 mg/L ). Two months later, he presented to the hospital with an erythematous patchy, scaling facial rash. His serum calcium corrected for albumin was high at 15.6 mg/dL. The rash and hypercalcemia, alongside vitamin A supplementation, raised suspicion of vitamin A toxicity. The patient, however, exhibited no hypercalcemia symptoms. He also had an acute kidney injury. His lab results revealed a PTH level of 10 pg/mL (normal range 15-65 pg/ml) and a normal myeloma screen, as well as normal vitamin D and TSH levels. An elevated PTHrP level of 5.2 pmol/l (normal range 0-2.3) was noted, which was attributed to the kidney injury(Cr 2.55 mg/l, eGFR 23 ml/min). Malignancy was excluded after a pan scan. Hypervitaminosis A is a clinical diagnosis, as serum vitamin A levels correlate poorly with toxicity. His serum retinol was normal at 0.83 mg/l, but his retinyl palmitate was high at 0.38 mg/L(reference range 0-0.10 mg/l), which supported our diagnosis. He received continuous IV 0.9% saline and subcutaneous calcitonin at 4 units/kg twice, and had a reduction in corrected calcium to 11 mg/dL over a week. The vitamin A-induced contact dermatitis improved with topical steroids. He was discharged; two months later, he remained asymptomatic with a corrected calcium of 11.1 mg/dL. He was not interested in further management as he was asymptomatic and serum calcium levels were improving. Labs were, however, notable for worsening renal function of unclear etiology. We will be trending his labs for improvement in serum calcium as the Vitamin A clears from his system. Clinical Lesson Vitamin A supplementation in cirrhotic patients is necessary in those with deficiency but carries a risk of toxicity. There are no definitive hepatology guidelines on the replacement of Vitamin A in patients with cirrhosis. This case emphasizes the importance of awareness of hypervitaminosis A-induced hypercalcemia in this population. Clinicians must carefully monitor and manage Vitamin A levels to avoid toxicity. Further research is essential for the management of this condition in cirrhotic patients. Presentation: 6/2/2024

Iron and Vitamin A Status of Children Aged 0 to 36 Months in Thulamela Municipality, Vhembe District, South Africa.

Objective: The present study assessed the iron and Vitamin A status of children aged 0 to 36 months in Thulamela municipality, Vhembe District. Methods: A cross-sectional study was conducted among 250 children aged 0 to 36 months attending well-baby clinic services with their mothers. Convenience sampling was used to select study participants, and simple random sampling was used to choose clinics. Data were gathered via a questionnaire administered by the researcher and field workers from August to September 2019. Standard techniques were used to measure body weight and height. In addition, serum retinol, haemoglobin, iron, ferritin, transferrin saturation, and transferrin levels were also assessed. Information on dietary diversity was gathered through a 24 h dietary recall. Results: The prevalence of underweight, wasting, and stunting was 3.6%, 2%, and 9.2%, respectively. Using serum retinol <10 µg/dL, 22% of children had vitamin A deficiency. The prevalence of anaemia was 53.6%, while 13.1% of children had iron deficiency anaemia when using serum ferritin of less than 12 μg/dL. Most children (90.8%) had an inadequate dietary diversity score, while 9.2% had sufficient dietary diversity. The most consumed food groups were grains, roots and tubers, vitamin A rich fruits and vegetable, and flesh foods. A higher percentage (44%) of children with low iron ferritin were underweight compared to those with normal iron ferritin (df = 1, p-value = 0.007). Conclusion: Iron, anaemia, and vitamin A deficiencies, accompanied by a high prevalence of stunting, were common among children in Thulamela Municipality. Thus, improving nutritional status in this area is a critical need.

Effectiveness of vitamin A supplementation among children under 5 years old in Kazakhstan

Micronutrient sufficiency leads to high rates of morbidity and mortality among children in Kazakhstan. Kazakhstan does not have a program for mandatory vitamin A supplementation of children under 5 years of age. Thus, the aim of this study was to assess the effectiveness of a pilot vitamin A supplementation program among children in Kazakhstan with the ultimate goal of informing future vitamin supplementation efforts. In Akmola and Kostanay regions of Kazakhstan, 529 children (aged 6-59 months) were randomly selected in each region through the local policlinics. In the first step of the study, mothers of the children were surveyed about the health status of their children using a standard data collection tool. Children were supplemented with Vitamin A using oral at a dose of 100,000 IU for children aged 6-11 months and 200,000 IU for children aged 12-59 months. Blood serum samples were collected for determining Vitamin A status. In the second step of the study, mothers were interviewed again about the health status of their children 6 months after the intervention and blood serum samples were collected to assess the efficacy of Vitamin A supplementation program. The number of self reported diarrhea cases and other intestinal infections significantly decreased after the vitamin A supplementation. The number of children with normal level of Vitamin A signficantly increased from before to after the intervention. Data from all participants (n = 529; pre VAS and 501 post VAS) showed that mean serum retinol levels increased significantly post VAS from 30.01 ±0.5 µg/dL to 61.06 ±1.2 µg/dL (p &lt;0.001) Likewise, a significant change was observed in the cases of reported diarrhea between pre-test and post-test assessments (30 vs. 95; p &lt;0.01). The health status of the examined children in the Akmola and Kostanay regions had significantly improved after the vitamin A supplementation and it points to the necessity of implementing Vitamin A supplementation program on the national level. This study has important policy implications for recommending the supplementation program on the national scale.

The Causal Association Between Blood Lead and Sleep Disorders: Evidence from National Health and Nutrition Examination Survey and Mendelian Randomization Analysis

BackgroundPoor sleep quality is a global public health concern. This study aimed to identify the risk factors for sleep disorders and clarify their causal effects.MethodsData were obtained from the National Health and Nutrition Examination Survey (NHANES) and Mendelian randomization (MR)-Base databases. Baseline characteristics of individuals with and without sleep disorders were compared. A multivariate logistic regression analysis was performed to calculate the effects of each variable on sleep disorders. Causal effects of blood lead levels and hypertension on sleep disorders were assessed using MR analysis.ResultsIn total, 3660 individuals were enrolled in the study. The prevalence of self-reported sleep disorders was 26.21%. Serum lead level, serum mercury level, serum retinol level, prevalence of hypertension, and daily vigorous work duration were significantly higher for those in the sleep disorders group than the control group. After adjusting for various covariates, the effects of serum lead and hypertension on sleep disorders were stable from logistic regression models 1–4. MR analysis showed that blood lead levels were causally related to the risk of sleep disorders (odds ratio (OR) = 1.09, 95% confidence interval (CI) 1.01–1.17, P = 0.030). There was no causal link between elevated blood pressure and sleep disorders (OR = 0.99, 95% CI 0.94–1.04, P = 0.757). Goodness-of-fit tests and sensitivity analyses were used to verify the reliability of the results.ConclusionsBlood lead is positively and causally associated with an increased risk of sleep disorders. These findings provide a novel perspective regarding sleep protection. Taking effective measures to reduce lead exposure may significantly improve sleep health.

Associations between serum retinol and all-cause mortality among adults with prediabetes and diabetes: A cohort study.

We aimed to explore the associations between serum retinol and all-cause mortality among people with prediabetes and diabetes. The study included 2582 participants with prediabetes and 1654 with diabetes aged ≥40 years from the National Health and Nutrition Examination Survey 2001-2006. Serum retinol was collected from laboratory tests and categorized into five groups, including <50, 50-60, 60-70, 70-80, and ≥80 μg/dL. Deaths were obtained by linkage to National Death Index up to December 31, 2019. Cox proportional hazards models were used to estimate the associations between serum retinol and all-cause mortality. During the follow-up, 993 participants with prediabetes died and 874 participants with diabetes died. There were U-shaped associations between serum retinol and mortality among participants with prediabetes and diabetes, separately. Among participants with prediabetes, compared to serum retinol levels of 50-60 μg/dL, the hazard ratio (HR) (95% confidence interval [CI]) of mortality was 1.40 (95% CI 1.11 to 1.76) and 1.26 (95% CI 1.00 to 1.57) for serum retinol <50 or ≥80 μg/dL, respectively. Among participants with diabetes, compared to serum retinol levels of 50-60 μg/dL, the hazard ratio (HR) (95% confidence interval [CI]) of mortality was 1.25 (95% CI 0.96 to 1.62) and 1.21 (95% CI 0.91 to 1.62) for serum retinol <50 or ≥80 μg/dL, respectively. The U-shaped associations between serum retinol and mortality still existed among participants aged ≥60 years with prediabetes or diabetes but were not statistically significant among those aged 40-59 years with prediabetes or diabetes. In conclusion, both low and excessive serum retinol tended to be with higher mortality risk among people with abnormal blood glucose.

Association between hematological parameters, serum retinol, and glycemic indices in diabetes mellitus: a preliminary case-control study

Background: The global prevalence of type 2 diabetes mellitus (T2DM) is on the rise. Hyperglycemia, free radical damage, and inflammation are commonly implicated as the etiopathological factors of diabetes mellitus. This preliminary study aims to investigate the association of the disease with serum retinol and hematological parameters and compare these parameters with non-diabetic controls. Methods: The biophysical profiles of 85 subjects with diabetes and the same number of healthy controls were recorded using standard techniques. Biochemical and hematological investigations were carried out. The data are expressed as median with interquartile range (IQR) values. Mann–Whitney U-test was conducted to assess the difference between the two groups. Results: There were a significant increase in median values of glycated hemoglobin (HbA1c), fasting blood glucose (FPG), and white blood cells (WBC) and a significant decrease in median values of monocytes in subjects with T2DM as compared to controls. There was a significant negative correlation between eosinophils and FPG in subjects with T2DM. In healthy controls, there was a significant positive correlation between serum retinol, certain hematological parameters, and HbA1c; and there was a significant negative correlation between WBC and FPG. The T2DM group had a significant negative correlation between eosinophil count and FBG. Conclusion: Our study shows that serum retinol levels are not reflective of oxidative stress, but a routine WBC and differential count can shed light on the chronic inflammatory status. These results help with the formulation of targeted treatment to delay progression of the disease and prevent its complications. Relevance for Patients: Vitamin A plays a pivotal role safeguarding the immunity and eye health for diabetic patients, but serum retinol estimation is not reflective of inflammatory or glycemic control status in diabetic patients. They would benefit from a hematocrit test.

Levels of retinol and retinoic acid in pancreatic cancer, type-2 diabetes and chronic pancreatitis.

Retinoids participate in multiple key processes in the human body e.g., vision, cell differentiation and embryonic development. There is growing evidence of the relationship between retinol, its active metabolite- all-trans retinoic acid (ATRA) - and several pancreatic disorders. Although low levels of ATRA in pancreatic ductal adenocarcinoma (PDAC) tissue have been reported, data on serum levels of ATRA in PDAC is still limited. The aim of our work was to determine serum concentrations of retinol and ATRA in patients with PDAC, type-2 diabetes mellitus (T2DM), chronic pancreatitis (CHP) and healthy controls. High performance liquid chromatography with UV detection (HPLC) was used to measure serum levels of retinol and ATRA in 246 patients with different stages of PDAC, T2DM, CHP and healthy controls. We found a significant decrease in the retinol concentration in PDAC (0.44+/-0.18 mg/L) compared to T2DM (0.65+/-0.19 mg/L, P<0.001), CHP (0.60+/-0.18 mg/L, P< 0.001) and healthy controls (0.61+/-0.15 mg/L, P<0.001), significant decrease of ATRA levels in PDAC (1.14+/-0.49 ug/L) compared to T2DM (1.37+/-0.56 ug/L, P<0.001) and healthy controls(1.43+/-0.55 ug/L, P<0.001). Differences between early stages (I+II) of PDAC and non-carcinoma groups were not significant. We describe correlations between retinol, prealbumin and transferrin, and correlation of ATRA and IGFBP-2. Significant decrease in retinol and ATRA levels in PDAC compared to T2DM, healthy individuals and/or CHP supports existing evidence of the role of retinoids in PDAC. However, neither ATRA nor retinol are suitable for detection of early PDAC. Correlation of ATRA levels and IGFBP-2 provides new information about a possible IGF and retinol relationship.

Characteristics of Vitamin A Deficiency Retinopathy at a Tertiary Referral Center in the United States

To explore the risk factors and fundus imaging features of vitamin A deficiency retinopathy (VADR) in an academic tertiary referral center in Atlanta, GA, United States, and to propose guidance regarding diagnostic workup and management of affected patients. Single-center retrospective case series. Nine patients seen between 2015 and 2021 at the Emory Eye Center diagnosed with VADR. Retrospective chart review. Baseline serum retinol level, Snellen visual acuity, multimodal fundus imaging findings, and electroretinography findings. Nine patients, 4 (44.4%) female, with a median (range) age of 68 (50-75) years were identified. The most common underlying etiologies for vitamin A deficiency included history of gastrointestinal surgery (55.6%), liver disease (44.4%), and nutritional depletion due to low-quality diet (44.4%). Only 1 (11.1%) patient had a history of bariatric surgery. Four (44.4%) patients were on some form of vitamin A supplementation before the diagnosis of VADR. Median (range) serum retinol level was 0.06 (< 0.06-0.19) mg/L. All patients had macular subretinal hyperreflective deposits resembling subretinal drusenoid deposits, although in some cases, these were scant and sparsely distributed. Six eyes of 3 patients with longstanding deficiency had defects in the external limiting membrane (ELM). Three of these eyes additionally had macular areas of complete retinal pigment epithelium and outer retinal atrophy (cRORA). Full-field electroretinography demonstrated severe rod dysfunction and mild to moderate cone system dysfunction. Many findings of VADR were reversible with vitamin A repletion. However, all eyes with ELM defects or cRORA had persistence or continued growth of these lesions. Vitamin A deficiency retinopathy is uncommon in the developed world. However, given that early intervention can lead to dramatic visual improvement and avoid potentially permanent retinal damage, retina specialists should be familiar with its clinical presentation. The presence of nyctalopia and subretinal hyperreflective deposits in a patient with a history of gastrointestinal surgery, liver disease, and/or poor diet can be suggestive of this diagnosis, even in the presence of ongoing vitamin A supplementation. Vitamin A supplementation can vary in route and dosage and can be tailored to the individual with serial testing of serum retinol. The authors have no proprietary or commercial interest in any materials discussed in this article.

Home Gardening of Yellow Cassava and Orange Maize for the Prevention of Nutritional Blindness in Children: An Economic Evaluation and Value of Information Analysis

ObjectivesVitamin A deficiency is the leading cause of childhood blindness worldwide, affecting mostly Sub-Saharan Africa. We aimed to predict the cost-effectiveness of home gardening (HG) of yellow cassava and orange maize to prevent nutritional blindness in children below 5 years and to assess the likely value of obtaining additional information in reducing uncertainty surrounding its cost-effectiveness. MethodsWe developed a Markov model and carried out probabilistic sensitivity analysis with a value of information analysis. We costed resources from a societal perspective and outcomes were measured in disability-adjusted life years (DALYs). ResultsHG was estimated to cost an additional Intl$395.00 per DALY averted, with a 72.27% likelihood of being cost-effective at a threshold of Intl$2800 per DALY. The expected value of information was estimated to be Intl$29 843.50 for 1 child or Intl$925 billion for 31 million Nigerian children affected by the decision. Further research is only worthwhile for 1 parameter (relative risk of low serum retinol; expected value of perfect parameter information Intl$29 854.53 per child and Intl$925 billion for 31 million children). ConclusionHG of yellow cassava and orange maize is expected to be highly cost-effective in preventing nutritional blindness in Nigerian children. Worthwhile further research includes a cost analysis of the intervention and a high-quality randomized trial to assess the effectiveness of HG on serum retinol levels in young children.

Autism Spectrum Disorder is Related to Increasing Intestinal Prevotella That Can Be Regulated by Vitamin A

Background: Increasing studies suggest that the microbiome-gut-brain axis plays a fundamental role in developing autism spectrum disorder (ASD). Objectives: We aimed to explore biomarkers from gut bacteria in ASD and the dietary vitamin A (VitA) relationship with intestinal bacteria of autistic children and provide a theoretical basis for dietary regulation of ASD. Methods: Ten autistic children aged 2 to 6 from special training facilities were enrolled from 2017 to 2018. At the same time, 10 healthy children aged 2 to 6 from a kindergarten were collected as a control. All participants were from Chongqing, China. The 16sRNA amplicon sequencing was used to analyze children's intestinal bacteria. The serum retinol level was detected by high-performance liquid chromatography (HPLC), and children's dietary intake was analyzed using three-day 24-hour dietary recalls. Results: There were significant differences in alpha diversity between the groups. Also, a higher relative abundance of Prevotellaceae, Prevotella 9, and Roseburia was observed among ASD children. We also found decreases in 9 bacteria (Enterobacteriales, Gammaproteobacteria, Enterobacteriaceae, Clostridiaceae 1, Clostridium sensu stricto 1, Escherichia-Shigella, Bacteroides fragilis, Escherichia coli, and Clostridium neonatale). Dietary VitA intake and serum retinol concentration were lower in the ASD group than in the control group. Meanwhile, serum VitA had a significantly negative correlation with the abundance of intestinal Prevotella 9. Conclusions: Our study helps identify some bacterial biomarkers for ASD, as in previous reports. Meanwhile, the study suggests that dietary VitA may be involved in the clinical symptoms of ASD by regulating the intestinal bacteria Prevotella. It may provide a new way to treat ASD in the future. Further studies are needed to identify the results by expanding the sample size and developing animal experiments.

Role of endogenous and exogenous antioxidants in risk of six cancers: evidence from the Mendelian randomization study.

Background: Although oxidative stress is known to contribute to cancer, and endogenous and exogenous antioxidants are thought to prevent tumorigenesis by suppressing oxidative stress-induced DNA damage, antioxidants have also been reported to show negative effects on tumor formation, necessitating characterization of the causal associations between antioxidants and cancer risk. Methods: In this study, Mendelian randomization (MR) analysis, primarily inverse-variance weighted MR, was used to assess the causal effect of six endogenous and five exogenous diet-derived antioxidants on the risk of six cancers. MR-Egger intercept test and Cochran's Q statistic were utilized to assess pleiotropy and heterogeneity, respectively. Results: For endogenous antioxidants, a bidirectional two-sample MR analysis was conducted. Our findings suggested that serum albumin has a negative causal association with the risk of prostate cancer [odds ratio (OR) = 0.78, 95% confidence interval (CI): 0.68-0.91, p = 0.001]. The risks of the six cancers showed no significant associations with endogenous antioxidants in the converse MR analysis. For exogenous antioxidants, the unidirectional two-sample MR analysis exhibited a nominal relationship between the serum retinol level and non-small-cell lung cancer risk (OR = 0.29, 95% CI: 0.11-0.76, p = 0.011). Conclusions: Thus, our study revealed the protective effects of genetic susceptibility to high circulating albumin levels on prostate cancer, providing potential targeted interventions for prostate cancer prevention.

Association of nonalcoholic fatty liver disease and liver fibrosis detected by transient elastography with serum retinol in American adults.

Retinol is a precursor of vitamin A, which is metabolized and maintained in the liver and is involved in the pathogenesis of the nonalcoholic fatty liver disease (NAFLD) and liver fibrosis. The relationship between NAFLD and liver fibrosis with serum retinol levels remains insufficient and inconclusive. Our study aimed to investigate the correlation between NAFLD, fibrosis, and serum retinol levels in American adults. A cross-sectional analysis was conducted using information from the 2017-2018 cycle of the National Health and Nutrition Examination Survey (NHANES). The exposure factors were NAFLD and liver fibrosis status detected using transient elastography (TE), and the outcome was serum retinol levels. Weighted multivariate regressions were established to assess the correlation between NAFLD and liver fibrosis and serum retinol levels. Subgroup analyses were also performed. This study included 3,537 participants. Compared to the group without NAFLD, NAFLD was positively correlated with serum retinol levels (β = 1.28, 95% CI: 0.19, 2.37). In the subgroup analysis, a positive correlation between NAFLD and serum retinol levels was found in people aged < 60 years, Mexican Americans, and those with a body mass index (BMI) < 25. On the contrary, compared to the group without liver fibrosis, there was a significant negative association between liver fibrosis and serum retinol (β = -3.46, 95% CI: -5.16, -1.75), especially in people aged < 60 years, non-Hispanic white/black individuals, and people with a BMI ≥ 25. Our study suggests that NAFLD status may be positively associated with serum retinol levels in adult patients, and liver fibrosis may be negatively associated with serum retinol levels. Further studies are required to examine the associations found in our study.

Nyctalopia in alcoholic liver disease–induced vitamin A deficiency

We report a case of a 52-year-old man with diminution of vision in both eyes at night for 15 days with mild retinal pigment epithelium changes at the macula and a tessellated background on fundus examination. Given his history of chronic alcohol consumption and jaundice two weeks back, vitamin A deficiency was contemplated. Electroretinogram (ERG) showed diminished responses. Serum retinol was 17 μg/dl. On supplementation with vitamin A, symptoms improved and ERG was normal; however, serum retinol levels were still low at 8.98 μg/dl. Thus, serum retinol does not necessarily indicate response to treatment, and ERG is necessitated in such cases.

The Effect of Chitosan and Chitosan Oligosaccharide on Serum Mineral and Vitamin Levels in Rats with Experimental Fluorosis

Fluorine toxicity occurs in different parts of the world. It is caused by the increase in the fluorine level in the waters, especially due to the dissolution of volcanic rocks over time. Water with high fluorine content can be taken with plant and animal irrigations, and foods obtained from plants and animals, or it can be taken directly with drinking water. In this study, the effects of chitosan (CS) and chitosan oligosaccharide (COS) on some serum trace minerals and vitamin levels in experimental fluorosis rats were investigated. Six groups were formed as control, fluorosis, fluorosis CS and COS groups, healthy CS and COS groups. CS and COS were administered orally for 28 days at a dose of 250 mg/kg. At the end of the study, ketamine anesthesia was administered and the heart was directly cannulated. Trace minerals (Cu, Zn, Mn, Fe, Se) and vitamins (retinol, α-tocopherol, D3) were analyzed. Cu, Zn, Se and Mn levels were found to be decreased in the F group compared to the control group. A significant increase was found in the Zn level in the F+CS group and in the Cu, Zn and Se levels in the F+CS group compared to the values in the F group. Serum retinol and α -tocopherol levels were decreased in the F, F+CS, F+COS and CS groups. In conclusion, our findings showed that there was a decrease in serum Zn, Cu, Se, retinol and α-tocopherol levels in rats with fluorosis, and COS was more effective than CS against the decrease in mineral and vitamin levels.

A Study to Improve the Vitamin A and Iodine Status of Pregnant Women through a Multiple Micronutrient Fortified Salt.

To study the efficacy of a multiple micronutrient fortified salt enriched with iron, iodine, vitamin A, vitamin B1, vitamin B2, vitamin B6, vitamin B12, niacin, and folic acid in improving serum retinol and iodine status of pregnant women. It was a randomized control trial in the antenatal clinic of a hospital. 151 women in the experimental group received a multiple micronutrient fortified salt to cook all their meals, and 150 women in the control group did not receive the fortified salt. Blood was collected in the three trimesters. Urine was collected in their first and third trimesters. Serum retinol, CRP (C-reactive protein), and AGP (Alpha glycoprotein) in blood were assessed, and iodine was assessed in urine. All the women were dewormed once. The inflammation adjusted mean serum retinol in three trimesters in the experimental group was 24.51, 27.29, and 25.68 µg/dL, and it was 28.97, 27.63, and 22.72 µg/dL in the control group. Over the study period of 6 months, the increase in serum retinol in the experimental group was 1.17 µg/dL whereas in the control group serum retinol decreased by 6.25 µg/dL. The experimental group increase in serum retinol is significantly more (p=0.0001) than the changes in retinol in the control group. The prevalence of serum retinol deficiency in the three trimesters was 39.1%,25.8%, and 37.7% in the experimental group and 14%, 22.7%, and 39.3% in the control group, and the change in the experimental group was significant (p=0.001) compared to the control group by binary logistic regression. Over the study period of 6 months there is a significant increase in urinary iodine concentration in the experimental group (p=0.030), showing absorption of iodine from the fortified salt whereas there is a significant decline in the iodine values in the control group (p=0.008). At the end of the study, the urinary iodine concentration of the experimental group was significantly more (p=0.0001) than that of the control group. The fortified salt was able to improve serum retinol levels and urinary iodine levels in pregnant women. Trial Registration. This trial was registered retrospectively on 19/02/2022 in the ISRCTN registry with trial ID ISRCTN17782574.

Effect of Moringa Oleifera fortified porridge consumption on protein and vitamin A status of children with cerebral palsy in Nairobi, Kenya: A randomized controlled trial.

Malnutrition due to inadequate dietary intake is commonly reported in children with Cerebral palsy (CP). Poor dietary intakes are majorly caused by feeding dysfunctions secondary to oro-motor impairment characteristic of the condition. Strategies that improve nutrient densities in foods can help enhance nutrient intakes by these children. This study investigated the effect of consumption of fermented finger millet porridge fortified with Moringa oleifera leaf powder (MoLP) on the protein and vitamin A status of children with CP. A randomized controlled trial was conducted among 113 children aged 5-11 years with CP. The study had two arms (intervention [N = 57] and control [N = 56]). The intervention group received a daily serving of fortified finger millet porridge for 3 months while the control group received non-fortified finger millet porridge servings. All children received the same amounts of porridge servings. The levels of serum albumin and retinol between the groups were compared at both baseline and end line. The BMI-for-age Z-scores (BMIAZ) and morbidity prevalence of the children were also assessed. At baseline, the two study groups were similar in all demographic and socio-economic characteristics, nutrient intakes, serum levels of albumin and retinol, weight status and morbidity. At end line, the children from the intervention group had significantly higher intakes of vitamin A at 717.12±432.7 μg/d (p = 0.038) and protein at 44.367±17.2 g/d (p = 0.031) respectively. The serum nutrients levels increased significantly from baseline by 0.456±0.12 g/dL (p<0.001) for albumin and by 0.243±0.10 μmol/L (p<0.001) for retinol among children in the intervention group. Among the children in the control group, the changes in the levels of both serum albumin 0.012±0.07 g/dL (p = 0.868) and serum retinol [0.0021±0.02 μmol/L (p = 0.890)] were not significant. At endline, the BMI-for-age Z-scores results showed that 10.52% and 34.0% of children from intervention and control group respectively were undernourished [χ2 = 30.985; p = 0.037]. Among the children in the intervention, group there was a significant change in the weight status between baseline and endline (p = 0.036). The weight status among children in the control group was not significantly different between baseline and endline (p = 0.109). Significant difference in morbidity prevalence between the two groups was also observed at endline (p = 0.003) with the prevalence being 24.6% and 51.8% among children in the intervention and control group respectively. Consumption of M. oleifera fortified porridge significantly improved the children's serum albumin and retinol levels, as well as BMIAZ. The trial is registered at Pan African Clinical Trials Registry, number PACTR202107669905145 URL link: https://pactr.samrc.ac.za/.

Dietary vitamin A intakes of chinese children with adequate liver stores as assessed by the retinol isotope dilution technique

BackgroundWe attempted to estimate dietary vitamin A requirements based on dietary vitamin A intake in well-nourished Chinese children with adequate liver vitamin A reserves.MethodsA cross-sectional study was conducted in a kindergarten and an elementary school in Shiyan city, Hubei province of China from December 2009 to July 2010. After screening, 60 children (22 aged 4 ~ 6 y and 38 aged 7 ~ 9 y) were randomly subjected to a 3-d or 18-d deuterated-retinol-dilution (DRD) procedure to evaluate the vitamin A reserves in the body and liver. Dietary intakes of vitamin A were estimated from two (one in winter and one in summer) consecutive 3-day weighed food records and dietary recalls.ResultsThe dietary vitamin A intakes were significantly correlated with vitamin A stores in the body and liver, but not with the serum level of retinol. The dietary vitamin A intakes were 476.9 ± 196.7 µg retinol equivalent (RE) (or 377.7 ± 166.2 µg retinol activity equivalent (RAE)) / day for 4 ~ 6 y children and 529.1 ± 87.2 µg RE/d (or 464.0 ± 81.1 µg RAE/d) for 7 ~ 9 y children with adequate liver vitamin A reserves. The estimated liver stores of vitamin A derived from both time points (3-d and 18-d) were similar.ConclusionAdequate dietary vitamin A intakes among the well-nourished Chinese children were estimated to be 477 µg RE/d (95%CI 385 ~ 570) or 378 µg RAE/d (95%CI 304 ~ 441) for 4 ~ 6 y children and 529 µg RE/d (95%CI 500 ~ 560) or 464 µg RAE/d (95%CI 437 ~ 491) for 7 ~ 9 y children. Although it needs to be verified in a larger population of different regions in China, our results provide important data to establish the dietary requirement of vitamin A specifically for Chinese children.

Gastrointestinal genetic reprogramming of vitamin A metabolic pathways in response of Roux-en-Y gastric bypass.

Roux-en-Y gastric bypass (RYGB) is one of the most performed bariatric surgical techniques. However, RYGB commonly results, as side effects, in nutritional deficiencies. This study aimed to examine changes in the expression of vitamin A pathway encoding genes in the gastrointestinal tract (GI) and to evaluate the potential mechanisms associated with hypovitaminosis A after RYGB. Intestinal biopsies were obtained through double-balloon endoscopy in 20 women with obesity (age 46.9±6.2 years; body mass index [BMI] 46.5±5.3 kg/m2 [mean±SD]) before and three months after RYGB (BMI, 38.2±4.2 kg/m2). Intestinal mucosal gene microarray analyses were performed in samples using a Human GeneChip 1.0 ST array (Affymetrix). Vitamin A intake was assessed from 7-day food records and serum retinol levels were evaluated by electrochemiluminescence immunoassay. Our results showed the following genes with significant downregulation (p≤0.05): LIPF (-0.60), NPC1L1 (-0.71), BCO1 (-0.45), and RBP4 (-0.13) in the duodenum; CD36 (-0.33), and ISX (-0.43) in the jejunum and BCO1 (-0.29) in the ileum. No significant changes in vitamin A intake were found (784±694 retinol equivalents [RE] pre-operative vs. 809±753 RE post-operative [mean±SD]). Although patients were routinely supplemented with 3500 international units IU/day (equivalent to 1050 μg RE/day) of oral retinol palmitate, serum concentrations were lower in the post-operative when compared to pre-operative period (0.35±0.14 μg/L vs. 0.52±0.33 μg/L, respectively - P=0.07), both within the normal range. After RYGB, the simultaneous change in expression of GI genes, may impair carotenoid metabolism in the enterocytes, formation of nascent chylomicrons and transport of retinol, resulting in lower availability of vitamin A.

Involvement of retinoic acid receptor α in the autistic-like behavior of rats with vitamin A deficiency by regulating neurexin 1 in the visual cortex: a mechanism study.

To study the mechanism of retinoic acid receptor α (RARα) signal change to regulate neurexin 1 (NRXN1) in the visual cortex and participate in the autistic-like behavior in rats with vitamin A deficiency (VAD). The models of vitamin A normal (VAN) and VAD pregnant rats were established, and some VAD maternal and offspring rats were given vitamin A supplement (VAS) in the early postnatal period. Behavioral tests were performed on 20 offspring rats in each group at the age of 6 weeks. The three-chamber test and the open-field test were used to observe social behavior and repetitive stereotyped behavior. High-performance liquid chromatography was used to measure the serum level of retinol in the offspring rats in each group. Electrophysiological experiments were used to measure the long-term potentiation (LTP) level of the visual cortex in the offspring rats. Quantitative real-time PCR and Western blot were used to measure the expression levels of RARα, NRXN1, and N-methyl-D-aspartate receptor 1 (NMDAR1). Chromatin co-immunoprecipitation was used to measure the enrichment of RARα transcription factor in the promoter region of the NRXN1 gene. The offspring rats in the VAD group had autistic-like behaviors such as impaired social interactions and repetitive stereotypical behaviors, and VAS started immediately after birth improved most of the behavioral deficits in offspring rats. The offspring rats in the VAD group had a significantly lower serum level of retinol than those in the VAN and VAS groups (P<0.05). Compared with the offspring rats in the VAN and VAS groups, the offspring rats in the VAD group had significant reductions in the mRNA and protein expression levels of NMDAR1, RARα, and NRXN1 and the LTP level of the visual cortex (P<0.05). The offspring rats in the VAD group had a significant reduction in the enrichment of RARα transcription factor in the promoter region of the NRXN1 gene in the visual cortex compared with those in the VAN and VAS groups (P<0.05). RARα affects the synaptic plasticity of the visual cortex in VAD rats by regulating NRXN1, thereby participating in the formation of autistic-like behaviors in VAD rats.

Correlation analysis between vitamin A, D, and E status with altitude, seasonal variation, and other factors, among children aged 0-6 years in a Chinese population living in the Tibetan plateau of Ganzi prefecture.

ObjectiveWe attempted to understand the status of vitamin (Vit) A, D, and E in children aged 0–6 living in the Tibetan plateau areas of Ganzi prefecture, to provide the basis for relevant government departments to carry out physical examinations of these children and to prevent and cure four key diseases (Infantile diarrhea, nutritional anemia, rickets, and infantile pneumonia).MethodsSerum retinol and tocopherol levels were detected using high‐performance liquid chromatography (HPLC). Serum levels of 25‐(OH)D were detected by high‐performance liquid chromatography–tandem mass spectrometry (LC–MS). The polynomial logistic regression was used to analyze the effects of age, season, altitude, and gender on Vit A, D, and E levels.ResultsVit A and D had the lowest mean serum levels before the age of 1 year and with the most significant deficiency rates. The lowest Vit E levels were seen in the Toddlerhood group. The rates of deficiency and insufficiency were the highest. Vit A, D, and E levels were significantly affected by seasonal changes and were significantly higher in the summer than in any other season. Vit A and D were significantly affected by altitude, and their levels were lowest above 4 km.ConclusionThe overall levels of Vit A, D, and E in children aged 0–6 in the Tibetan plateau areas of Ganzi prefecture were lower than those in the plain's areas.