The effects of zinc supplementation on serum zinc concentration and protein catabolic rate in hemodialysis patients
| Autor: | Cynthia G. Weber, Nancy A. Jern, Carolyn Cochran, George U. Liepa, Anne D. VanBeber, M.A. Gorman |
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| Rok vydání: | 2000 |
| Předmět: |
Adult
Male medicine.medical_specialty medicine.medical_treatment Medicine (miscellaneous) chemistry.chemical_element Nutritional Status Zinc Placebo Double-Blind Method Renal Dialysis Internal medicine medicine Humans Urea Dialysis Aged Aged 80 and over Nutrition and Dietetics Serum zinc Catabolism business.industry Proteins Middle Aged Serum samples Diet Records Zinc Sulfate Surgery Food record Endocrinology chemistry Nephrology Dietary Supplements Kidney Failure Chronic Female Hemodialysis Dietary Proteins business Energy Intake |
| Zdroj: | Journal of renal nutrition : the official journal of the Council on Renal Nutrition of the National Kidney Foundation. 10(3) |
| ISSN: | 1051-2276 |
| Popis: | To examine the effect of zinc sulfate supplementation on serum zinc concentrations and protein catabolic rate (PCR) in hemodialysis (HD) patients.Randomized, double-blind, before-after trial.Outpatient dialysis center in a large metropolitan city.Twenty-eight maintenance HD patients were selected. Twenty (15 women, 5 men) subjects completed the study. Subjects were identified for inclusion in the study by the following criteria: a history of low PCR (0.09 g/kg body weight), HD treatment for a minimum of 6 months, no signs of gastrointestinal disorders, and no record of hospitalizations for reasons other than access complication within the last 3 months.Patients consumed 7.7 pmol zinc sulfate (2,200 microg) or a cornstarch placebo capsule daily for 90 days. In addition, patients completed a 2-day food record representative of 1 dialysis day and 1 nondialysis day.Fasting, predialysis serum samples were collected on days 0, 40, and 90 to determine serum zinc concentration and PCR. Dietary parameters including intake of zinc, protein, and energy were analyzed on Days 0 and 90.Initial analysis at Day 0 of serum zinc concentration indicated subjects were below the normal range for serum zinc standards (12.2 micromol/L [80 microg/dL]). After supplementation, subjects in the zinc-supplemented group showed significant increases in serum zinc concentrations from 12.2 micromol/L (80 microg/dL) at Day 0 to 15.3 pmol/L (100 microg/dL) at Day 90. A significant positive correlation (r = +0.61) was shown between PCR and serum zinc concentrations at the end of the study. Reported dietary protein intake did not change with zinc supplementation.Low serum zinc concentrations are reversible with zinc supplementation. Improvement in serum zinc concentration increases the PCR of HD patients. |
| Databáze: | OpenAIRE |
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