OBJECTIVE: To identify differences in postexercise phosphocreatine (PCr) recovery, an index of mitochondrial function, in diabetic patients with and without lower extremity complications. METHODS: We enrolled healthy control subjects and three groups of patients with type 2 diabetes mellitus: without complications, with peripheral neuropathy, and with both peripheral neuropathy and peripheral arterial disease. We used magnetic resonance spectroscopic measurements to perform continuous measurements of phosphorous metabolites (PCr and inorganic phosphate [Pi]) during a 3-minute graded exercise at the level of the posterior calf muscles (gastrocnemius and soleus muscles). Micro- and macrovascular reactivity measurements also were performed. RESULTS: The resting Pi/PCr ratio and PCr at baseline and the maximum reached during exercise were similar in all groups. The postexercise time required for recovery of Pi/PCr ratio and PCr levels to resting levels, an assessment of mitochondrial oxidative phosphorylation, was significantly higher in diabetic patients with neuropathy and those with both neuropathy and peripheral arterial disease (P < .01 for both measurements). These two groups also had higher levels of tumor necrosis factor-α (P < .01) and granulocyte colony-stimulating factor (P < .05). Multiple regression analysis showed that only granulocyte colony-stimulating factor, osteoprotegerin, and tumor necrosis factor-α were significant contributing factors in the variation of the Pi/PCr ratio recovery time. No associations were observed between micro- and macrovascular reactivity measurements and Pi/PCr ratio or PCr recovery time. CONCLUSIONS: Mitochondrial oxidative phosphorylation is impaired only in type 2 diabetes mellitus patients with neuropathy whether or not peripheral arterial disease is present and is associated with the increased proinflammatory state observed in these groups.
OBJECTIVE: To identify differences in postexercise phosphocreatine (PCr) recovery, an index of mitochondrial function, in diabeticpatients with and without lower extremity complications. METHODS: We enrolled healthy control subjects and three groups of patients with type 2 diabetes mellitus: without complications, with peripheral neuropathy, and with both peripheral neuropathy and peripheral arterial disease. We used magnetic resonance spectroscopic measurements to perform continuous measurements of phosphorous metabolites (PCr and inorganic phosphate [Pi]) during a 3-minute graded exercise at the level of the posterior calf muscles (gastrocnemius and soleus muscles). Micro- and macrovascular reactivity measurements also were performed. RESULTS: The resting Pi/PCr ratio and PCr at baseline and the maximum reached during exercise were similar in all groups. The postexercise time required for recovery of Pi/PCr ratio and PCr levels to resting levels, an assessment of mitochondrial oxidative phosphorylation, was significantly higher in diabeticpatients with neuropathy and those with both neuropathy and peripheral arterial disease (P < .01 for both measurements). These two groups also had higher levels of tumor necrosis factor-α (P < .01) and granulocyte colony-stimulating factor (P < .05). Multiple regression analysis showed that only granulocyte colony-stimulating factor, osteoprotegerin, and tumor necrosis factor-α were significant contributing factors in the variation of the Pi/PCr ratio recovery time. No associations were observed between micro- and macrovascular reactivity measurements and Pi/PCr ratio or PCr recovery time. CONCLUSIONS: Mitochondrial oxidative phosphorylation is impaired only in type 2 diabetes mellituspatients with neuropathy whether or not peripheral arterial disease is present and is associated with the increased proinflammatory state observed in these groups.
Authors: Andrea M Vincent; James L Edwards; Lisa L McLean; Yu Hong; Federica Cerri; Ignazio Lopez; Angelo Quattrini; Eva L Feldman Journal: Acta Neuropathol Date: 2010-05-15 Impact factor: 17.088
Authors: Justin D Anderson; Frederick H Epstein; Craig H Meyer; Klaus D Hagspiel; Hongkun Wang; Stuart S Berr; Nancy L Harthun; Arthur Weltman; Joseph M Dimaria; Amy M West; Christopher M Kramer Journal: J Am Coll Cardiol Date: 2009-08-11 Impact factor: 24.094
Authors: A E Caballero; S Arora; R Saouaf; S C Lim; P Smakowski; J Y Park; G L King; F W LoGerfo; E S Horton; A Veves Journal: Diabetes Date: 1999-09 Impact factor: 9.461
Authors: V B Schrauwen-Hinderling; M E Kooi; M K C Hesselink; J A L Jeneson; W H Backes; C J A van Echteld; J M A van Engelshoven; M Mensink; P Schrauwen Journal: Diabetologia Date: 2006-11-09 Impact factor: 10.122
Authors: Iraklis I Pipinos; Victor G Sharov; Alexander D Shepard; Petros V Anagnostopoulos; Asterios Katsamouris; Anastasia Todor; Konstantinos A Filis; Hani N Sabbah Journal: J Vasc Surg Date: 2003-10 Impact factor: 4.268
Authors: Thanh Dinh; John Doupis; Thomas E Lyons; Sarada Kuchibhotla; Walker Julliard; Charalambos Gnardellis; Barry I Rosenblum; Xiaoen Wang; John M Giurini; Robert L Greenman; Aristidis Veves Journal: Diabetes Care Date: 2009-06-09 Impact factor: 19.112
Authors: Hassan Albadawi; A Aria Tzika; Christian Rask-Madsen; Lindsey M Crowley; Michael W Koulopoulos; Hyung-Jin Yoo; Michael T Watkins Journal: J Surg Res Date: 2016-06-08 Impact factor: 2.192