BACKGROUND: The purpose of this study is to clarify skeletal muscle oxidative metabolism in children with end-stage renal disease (ESRD) before and after renal transplantation. METHODS: We examined muscle oxygenation and metabolism by using noninvasive near-infrared spectroscopy in 10 patients (age, 12.4 +/- 3.1 years) 1 week before and 4 weeks after renal transplantation and in 10 controls (age, 12.8 +/- 2.6 years) during submaximal hand-grip exercise using the flexor digitorum superficialis muscle. We used 2 indicators to evaluate muscle metabolism. The rate of initial decrease in hemoglobin/myoglobin deoxygenation during arterial occlusion after exercise relative to the value at rest (S2/S1) was used as an indicator of mitochondrial oxygen consumption, whereas recovery time (TR) after exercise was used as an indicator of oxygen delivery to the muscle and aerobic capacity. RESULTS: S2/S1 and TR after exercise were significantly lower in patients before renal transplantation compared with the control group (P < 0.05). S2/S1 and TR after exercise improved significantly after renal transplantation (P < 0.01, P < 0.05) and were not significantly different from those of controls. CONCLUSION: Oxidative metabolism in skeletal muscle during exercise is impaired in children with ESRD and recovers after renal transplantation.
BACKGROUND: The purpose of this study is to clarify skeletal muscle oxidative metabolism in children with end-stage renal disease (ESRD) before and after renal transplantation. METHODS: We examined muscle oxygenation and metabolism by using noninvasive near-infrared spectroscopy in 10 patients (age, 12.4 +/- 3.1 years) 1 week before and 4 weeks after renal transplantation and in 10 controls (age, 12.8 +/- 2.6 years) during submaximal hand-grip exercise using the flexor digitorum superficialis muscle. We used 2 indicators to evaluate muscle metabolism. The rate of initial decrease in hemoglobin/myoglobin deoxygenation during arterial occlusion after exercise relative to the value at rest (S2/S1) was used as an indicator of mitochondrial oxygen consumption, whereas recovery time (TR) after exercise was used as an indicator of oxygen delivery to the muscle and aerobic capacity. RESULTS: S2/S1 and TR after exercise were significantly lower in patients before renal transplantation compared with the control group (P < 0.05). S2/S1 and TR after exercise improved significantly after renal transplantation (P < 0.01, P < 0.05) and were not significantly different from those of controls. CONCLUSION: Oxidative metabolism in skeletal muscle during exercise is impaired in children with ESRD and recovers after renal transplantation.
Authors: Donald J Weaver; Thomas R Kimball; Timothy Knilans; Wayne Mays; Sandra K Knecht; Yvette M Gerdes; Sandy Witt; Betty J Glascock; Janis Kartal; Philip Khoury; Mark M Mitsnefes Journal: J Am Soc Nephrol Date: 2008-01-09 Impact factor: 10.121
Authors: Yue Yue Zhang; Li Jie Gu; Jin Fang Bao; Wei Jie Yuan; Juan Huang; Min Chao Cai; Hong Lei Yu; Wei Zhang Journal: Eur J Clin Nutr Date: 2019-01-03 Impact factor: 4.016