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The Impact of Oat (Avena Sativa) Consumption on Biomarkers of Renal Function in Patients With Chronic Kidney Disease: A Parallel Randomized Clinical Trial Publisher Pubmed



Rouhani MH1 ; Mortazavi Najafabadi M2 ; Surkan PJ3 ; Esmaillzadeh A4, 7, 8 ; Feizi A5 ; Azadbakht L1, 4, 6
Authors
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Authors Affiliations
  1. 1. Food Security Research Center and Department of Community Nutrition, School of Nutrition and Food Science, Isfahan University of Medical Sciences, Isfahan, Iran
  2. 2. Kidney Diseases Research Center and Division of Nephrology, Department of Internal Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
  3. 3. Department of International Health, John Hopkins School of Public Health, Baltimore, United States
  4. 4. Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
  5. 5. Department of Epidemiology and Biostatistics, Isfahan University of Medical Sciences, Isfahan, Iran
  6. 6. Diabetes Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
  7. 7. Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
  8. 8. Obesity and Eating Habits Research Center, Endocrinology and Metabolism Molecular -Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran

Source: Clinical Nutrition Published:2018


Abstract

Background & objective: Animal studies report that oat (Avena sativa L) intake has favorable effects on kidney function. However, the effects of oat consumption have not been assessed in humans. The aim of this study was to examine the impact of oat intake on biomarkers of renal function in patients with chronic kidney disease (CKD). Methods: Fifty-two patients with CKD were randomly assigned to a control group (recommended to reduce intake of dietary protein, phosphorus, sodium and potassium) or an oat consumption group (given nutritional recommendations for controls +50 g/day oats). Blood urea nitrogen (BUN), serum creatinine (SCr), urine creatinine, serum albumin, serum potassium, parathyroid hormone (PTH), serum klotho and urine protein concentration were measured at baseline and after an eight-week intervention. Creatinine clearance was calculated using urine creatinine concentration. Results: Within group analysis showed a significant increase in BUN (P = 0.02) and serum potassium (P = 0.01) and a marginally significant increment in SCr (P = 0.08) among controls. However, changes in the oat group were not significant. In a multivariate adjusted model, we observed a significant difference in change of serum potassium (−0.03 mEq/L for oat group and 0.13 mEq/L for control group; P = 0.01) and a marginally significant difference in change of serum albumin (0.01 g/dl for oat group and −0.08 for control group; P = 0.08) between the two groups. There was no change in PTH concentration. Conclusion: Intake of oats may have a beneficial effect on serum albumin and serum potassium in patients with CKD. Registration code: Present study registered under IRCT.ir identifier no. IRCT2015050414551N2. © 2016 Elsevier Ltd and European Society for Clinical Nutrition and Metabolism
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