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Infections in children with simple obesity: The relation to phagocytic function and serum leptin.
Journal of Infection and Public Health 2018 September 11
INTRODUCTION: There is a possible association between obesity and infections. We sought to investigate phagocytic functions in obese children and their relation to serum leptin levels.
METHODS: A cross sectional, controlled study was conducted, comprising 40 cases with simple visceral-type obesity. Subjects were evaluated for percentage of caloric intake, frequency and type of infections, body mass index (BMI) z score, in addition to complete blood counting, serum leptin assay (ELISA) and Dihydrorhodamine (DHR) flowcytometry.
RESULTS: Cases were 21 males (52.5%) and 19 females (47.5%) with mean age 7.14 years±2.73 SD with median duration of obesity 4.2 years (IQR: 2-6). Cases had higher frequency of infections compared with controls (p<0.001). Serum leptin was significantly higher among cases (t=-12.391, p<0.001), while DHR results were comparable in the studied groups (p=0.067). Among cases, absolute lymphocytic count (ALC) correlated negatively with percentage of total caloric intake (p=0.045). Leptin levels correlated positively with frequency of infections (p=0.019) but negatively with ALC (p=0.043). DHR results showed weak negative correlations with serum leptin (p=0.177) and with BMI Z score (p=0.109).
CONCLUSION: Obese children are posed at increased risk of infections and have higher serum leptin levels with possible negative effects of leptin on phagocytic functions.
METHODS: A cross sectional, controlled study was conducted, comprising 40 cases with simple visceral-type obesity. Subjects were evaluated for percentage of caloric intake, frequency and type of infections, body mass index (BMI) z score, in addition to complete blood counting, serum leptin assay (ELISA) and Dihydrorhodamine (DHR) flowcytometry.
RESULTS: Cases were 21 males (52.5%) and 19 females (47.5%) with mean age 7.14 years±2.73 SD with median duration of obesity 4.2 years (IQR: 2-6). Cases had higher frequency of infections compared with controls (p<0.001). Serum leptin was significantly higher among cases (t=-12.391, p<0.001), while DHR results were comparable in the studied groups (p=0.067). Among cases, absolute lymphocytic count (ALC) correlated negatively with percentage of total caloric intake (p=0.045). Leptin levels correlated positively with frequency of infections (p=0.019) but negatively with ALC (p=0.043). DHR results showed weak negative correlations with serum leptin (p=0.177) and with BMI Z score (p=0.109).
CONCLUSION: Obese children are posed at increased risk of infections and have higher serum leptin levels with possible negative effects of leptin on phagocytic functions.
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