Influence of Cytosolic PH on in Vivo Assessment of Human Muscle Mitochondrial Respiration by Phosphorus Magnetic Resonance Spectroscopy

Overview

Journal MAGMA

Publisher Springer

Date 1997 Jun 1

PMID 9268081

Citations 8

Authors

R Lodi

G J Kemp

S Iotti

G K Radda

B Barbiroli

Affiliations

Soon will be listed here.

Abstract

The authors present an in vivo phosphorus magnetic resonance spectroscopy systematic study on the effects of cytosolic pH on skeletal muscle mitochondrial respiration in human calf muscle. In 49 normal subjects, the effect of cytosolic pH on kinetics of phosphocreatine and adenosine diphosphate recovery and on maximum rate of mitochondrial adenosine triphosphate production (Q(MAX)) was evaluated. The results show a strong relationship between the rate of postexercise phosphocreatine recovery and the lowest value of cytosolic pH reached during recovery from exercise (termed minimum pH; r = 0.89); in contrast, both adenosine diphosphate recovery halftime and Q(MAX) were independent of cytosolic pH at the end of exercise.

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