Increased oxidative stress parameters in children with moderate iodine deficiency
-
Huseyin Kurku
,
Ali Gencer
Abstract
Background:
Iodine is a part of thyroid hormones and has been reported to act directly as an antioxidant or induce indirectly antioxidant enzymes. This study aimed to assess the urinary iodine concentration and its relationship between the antioxidant and oxidative stress capacity in healthy school-aged children.
Methods:
In total, 196 students from five primary schools, randomly selected between 9 and 12 years (mean age: 10.2±1.2 years), were enrolled in the study. Urinary iodine levels were measured by spectrophotometry with the Sandell-Kolthoff reaction. Total antioxidant status (TAS) and total oxidant status (TOS) were analysed from urine samples. The ratio of TOS to TAS was regarded as an oxidative stress index (OSI), an indicator of the degree of oxidative status.
Results:
Fifty-four percentage (107) of the children had iodine deficiency (ID) and the majority of them (30%) had mild ID. There was no severe-ID child in the population (<20 μg/L). Urine TAS levels were significantly lower in the moderate-ID group than in the mild-ID group (6.5±4.1 vs. 11.3±4.1 mmol, p<0.001) and the iodine-sufficient group (11.0±5.3 μmol, p<0.001). TOS levels and OSI were found higher in the moderate-ID group than in the mild-ID group (4.8±2.1 vs. 3.7±2.1 μmol, p<0.001) and the iodine-sufficient group (4.8±2.1 vs. 3.4±2.5 mmol, p<0.001). In the moderate-ID group, low urine iodine levels exhibited significant negative correlations with OSI (r=−0.660) and TOS (r=−0.248) and a positive correlation with TAS (r=0.475).
Conclusions:
We found that children with moderate ID were exposed to more oxidative burden than children with mild ID or iodine sufficiency. Increased systemic oxidative stress induced by moderate ID could cause development of ID-related complications and diseases. Iodine supplementation could have a beneficial role in the prevention of oxidative stress.
Author contributions: All the authors have accepted responsibility for the entire content of this submitted article and approved submission.
Research funding: None declared.
Employment or leadership: None declared.
Honorarium: None declared.
Competing interests: The funding organization(s) played no role in the study design; in the collection, analysis, and interpretation of data; in the writing of the report; or in the decision to submit the report for publication.
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©2016 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Review
- An update on thyroid-associated ophthalmopathy in children and adolescents
- Mini Review
- Systematic review and meta-analysis of the association between mumps during childhood and risk of type 1 diabetes mellitus
- Original Articles
- Glycemic variability predicts inflammation in adolescents with type 1 diabetes
- Prevalence and risk factors for diabetic retinopathy in a hospital-based population of Australian children and adolescents with type 1 diabetes
- One month of omega-3 fatty acid supplementation improves lipid profiles, glucose levels and blood pressure in overweight schoolchildren with metabolic syndrome
- The outcome of seven patients with hereditary tyrosinemia type 1
- Increased oxidative stress parameters in children with moderate iodine deficiency
- Relationship between 25(OH)D levels and circulating lipids in African American adolescents
- Endoglin and obestatin levels, cardiometabolic risk factors and subclinical atherosclerosis in children aged 10–18 years
- Lipoprotein-associated phospholipase A2 activity and low-density lipoprotein subfractions after a 2-year treatment with atorvastatin in adolescents with type 1 diabetes
- Genetic characteristics and long-term follow-up of 11 patients with congenital hyperinsulinism followed in a single center
- Pituitary volume in children with growth hormone deficiency, idiopathic short stature and controls
- Case Reports
- A novel insulin receptor mutation in an adolescent with acanthosis nigricans and hyperandrogenism
- Primary hyperparathyroidism may masquerade as rickets-osteomalacia in vitamin D replete children
- Co-existence of phenylketonuria either with maple syrup urine disease or Sandhoff disease in two patients from Iran: emphasizing the role of consanguinity
- Severe malnutrition causing superior mesenteric artery syndrome in an adolescent with Triple A syndrome
- Solving a case of allelic dropout in the GNPTAB gene: implications in the molecular diagnosis of mucolipidosis type III alpha/beta
Articles in the same Issue
- Frontmatter
- Review
- An update on thyroid-associated ophthalmopathy in children and adolescents
- Mini Review
- Systematic review and meta-analysis of the association between mumps during childhood and risk of type 1 diabetes mellitus
- Original Articles
- Glycemic variability predicts inflammation in adolescents with type 1 diabetes
- Prevalence and risk factors for diabetic retinopathy in a hospital-based population of Australian children and adolescents with type 1 diabetes
- One month of omega-3 fatty acid supplementation improves lipid profiles, glucose levels and blood pressure in overweight schoolchildren with metabolic syndrome
- The outcome of seven patients with hereditary tyrosinemia type 1
- Increased oxidative stress parameters in children with moderate iodine deficiency
- Relationship between 25(OH)D levels and circulating lipids in African American adolescents
- Endoglin and obestatin levels, cardiometabolic risk factors and subclinical atherosclerosis in children aged 10–18 years
- Lipoprotein-associated phospholipase A2 activity and low-density lipoprotein subfractions after a 2-year treatment with atorvastatin in adolescents with type 1 diabetes
- Genetic characteristics and long-term follow-up of 11 patients with congenital hyperinsulinism followed in a single center
- Pituitary volume in children with growth hormone deficiency, idiopathic short stature and controls
- Case Reports
- A novel insulin receptor mutation in an adolescent with acanthosis nigricans and hyperandrogenism
- Primary hyperparathyroidism may masquerade as rickets-osteomalacia in vitamin D replete children
- Co-existence of phenylketonuria either with maple syrup urine disease or Sandhoff disease in two patients from Iran: emphasizing the role of consanguinity
- Severe malnutrition causing superior mesenteric artery syndrome in an adolescent with Triple A syndrome
- Solving a case of allelic dropout in the GNPTAB gene: implications in the molecular diagnosis of mucolipidosis type III alpha/beta
