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Nutrition and Growth in Cystic Fibrosis

Malnutrition is a common complication of chronic diseases in children and may lead to growth impairment (stunting). Malnutrition in cystic fibrosis (CF) results from increased energy expenditure, decreased energy intakes, malabsorption of ingested nutrients because of pancreatic insufficiency and chronic inflammation. Malnutrition and high levels of inflammatory cytokines affect IGF-1 production through interrelated mechanisms. Nutritional support was shown to improve both nutritional status and outcome in CF. However, some nutrients have a direct effect on the disease. n-3 fatty acids supplementation is able to correct lipid abnormalities resulting from a primary mechanism. Moreover, n-3 fatty acids have a direct effect on the inflammatory response, decreasing eicosanoid synthesis and modulating nuclear transcriptional factors nuclear factor ĸB and peroxisome proliferator-activated receptors γ. Nutritional support may be considered part of the care of the CF patient together with antibiotics, pancreatic enzymes and physiotherapy, influencing significantly the evolution of the disease.