Ana Paula Black1, Juliana S Anjos2, Ludmila Cardozo2, Flávia L Carmo3, Carla J Dolenga4, Lia S Nakao4, Dennis de Carvalho Ferreira5, Alexandre Rosado3, José Carlos Carraro Eduardo6, Denise Mafra7. 1. Post Graduation Program in Medical Sciences, Fluminense Federal University (UFF), Niterói-RJ, Brazil. Electronic address: apblack2013@gmail.com. 2. Post Graduation Program in Cardiovascular Sciences, Fluminense Federal University (UFF), Niterói-RJ, Brazil. 3. Institute of Microbiology, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil. 4. Basic Pathology Department, Federal University of Paraná (UFPR), Curitiba-PR, Brazil. 5. Veiga de Almeida University, and Estácio de Sá University, Faculty of Dentistry, Rio de Janeiro, Brazil. 6. Faculty of Medicine, Fluminense Federal University (UFF), Niterói-RJ, Brazil. 7. Post Graduation Program in Medical Sciences, Fluminense Federal University (UFF), Niterói-RJ, Brazil; Post Graduation Program in Cardiovascular Sciences, Fluminense Federal University (UFF), Niterói-RJ, Brazil.
Abstract
OBJECTIVES: To evaluate the effects of low-protein diet (LPD) on uremic toxins and the gut microbiota profile in nondialysis chronic kidney disease (CKD) patients. DESIGN AND METHODS: Longitudinal study with 30 nondialysis CKD patients (stage 3-4) undergoing LPD for 6 months. Adherence to the diet was evaluated based on the calculation of protein equivalent of nitrogen appearance from the 24-hour urine analysis. Good adherence to LPD was considered when protein intake was from 90% to 110% of the prescribed amount (0.6 g/kg/day). Food intake was analyzed by the 24-hour recall method. The anthropometric, biochemical and lipid profile parameters were measured according to standard methods. Uremic toxin serum levels (indoxyl sulfate, p-cresyl sulfate, indole-3-acetic acid) were obtained by reversed-phase high-performance liquid chromatography (RP-HPLC). Fecal samples were collected to evaluate the gut microbiota profile through polymerase chain reaction and denaturing gradient gel electrophoresis. Statistical analysis was performed by the SPSS 23.0 program software. RESULTS: Patients who adhered to the diet (n = 14) (0.7 ± 0.2 g/kg/day) presented an improvement in renal function (nonsignificant) and reduction in total and low-density lipoprotein cholesterol (183.9 ± 48.5-155.7 ± 37.2 mg/dL, P = .01; 99.4 ± 41.3-76.4 ± 33.2 mg/dL, P = .01, respectively). After 6 months of nutricional intervention, p-cresyl sulfate serum levels were reduced significantly in patients who adhered to the LPD (19.3 [9.6-24.7] to 15.5 [9.8-24.1] mg/L, P = .03), and in contrast, the levels were increased in patients who did not adhere (13.9 [8.0-24.8] to 24.3 [8.1-39.2] mg/L, P = .004). In addition, using the denaturing gradient gel electrophoresis technique, it was observed change in the intestinal microbiota profile after LPD intervention in both groups, and the number of bands was positively associated with protein intake (r = 0.44, P = .04). CONCLUSION: LPD seems be a good strategy to reduce the uremic toxins production by the gut microbiota in nondialysis CKD patients.
OBJECTIVES: To evaluate the effects of low-protein diet (LPD) on uremic toxins and the gut microbiota profile in nondialysis chronic kidney disease (CKD) patients. DESIGN AND METHODS: Longitudinal study with 30 nondialysis CKDpatients (stage 3-4) undergoing LPD for 6 months. Adherence to the diet was evaluated based on the calculation of protein equivalent of nitrogen appearance from the 24-hour urine analysis. Good adherence to LPD was considered when protein intake was from 90% to 110% of the prescribed amount (0.6 g/kg/day). Food intake was analyzed by the 24-hour recall method. The anthropometric, biochemical and lipid profile parameters were measured according to standard methods. Uremic toxin serum levels (indoxyl sulfate, p-cresyl sulfate, indole-3-acetic acid) were obtained by reversed-phase high-performance liquid chromatography (RP-HPLC). Fecal samples were collected to evaluate the gut microbiota profile through polymerase chain reaction and denaturing gradient gel electrophoresis. Statistical analysis was performed by the SPSS 23.0 program software. RESULTS:Patients who adhered to the diet (n = 14) (0.7 ± 0.2 g/kg/day) presented an improvement in renal function (nonsignificant) and reduction in total and low-density lipoprotein cholesterol (183.9 ± 48.5-155.7 ± 37.2 mg/dL, P = .01; 99.4 ± 41.3-76.4 ± 33.2 mg/dL, P = .01, respectively). After 6 months of nutricional intervention, p-cresyl sulfate serum levels were reduced significantly in patients who adhered to the LPD (19.3 [9.6-24.7] to 15.5 [9.8-24.1] mg/L, P = .03), and in contrast, the levels were increased in patients who did not adhere (13.9 [8.0-24.8] to 24.3 [8.1-39.2] mg/L, P = .004). In addition, using the denaturing gradient gel electrophoresis technique, it was observed change in the intestinal microbiota profile after LPD intervention in both groups, and the number of bands was positively associated with protein intake (r = 0.44, P = .04). CONCLUSION:LPD seems be a good strategy to reduce the uremic toxins production by the gut microbiota in nondialysis CKDpatients.
Authors: Feby Savira; Ruth Magaye; Danny Liew; Christopher Reid; Darren J Kelly; Andrew R Kompa; S Jeson Sangaralingham; John C Burnett; David Kaye; Bing H Wang Journal: Br J Pharmacol Date: 2020-05-13 Impact factor: 8.739
Authors: Gretchen N Wiese; Annabel Biruete; Ranjani N Moorthi; Sharon M Moe; Stephen R Lindemann; Kathleen M Hill Gallant Journal: J Ren Nutr Date: 2020-06-29 Impact factor: 3.655