Abstract：
:Microdialysis is a valuable tool to measure tissue responses. We hypothesized that skeletal muscle metabolism can be modulated by microdialysis applied drugs which alter cytosolic calcium concentration. With approval of the local animal care committee, the hind limbs of sacrificed male Sprague Dawley rats were perfused either with Ringer's solution or with dantrolene 1 microM at 30 ml hr(-1) and 21 degrees. Microdialysis probes in both hind limbs were perfused at 1 microl min(-1) either with sorbitol 80 mM, calcium 20 mM, 40 mM, 80 mM, caffeine 40 mM, 80 mM, and halothane 10 vol% respectively, and at the contralateral adductor muscle with Ringer as control. Lactate was measured spectrophotometrically in the dialysate at 15 min. intervals. Lactate levels as measured by intramuscular microdialysis were not influenced by intramuscular application of sorbitol 80 mM compared to control measurements with Ringer's solution. Local application of calcium 20 mM, 40 mM, 80 mM, caffeine 40 mM, 80 mM, and halothane 10 vol% via microdialysis increased lactate concentrations, while organ perfusion by dantrolene 1 microM reduced the caffeine-induced lactate increase. Modulation of intramuscular lactate metabolism by exogenous compounds via microdialysis probes generates new insights in skeletal muscle metabolism.
journal_name
Basic Clin Pharmacol Toxicoljournal_title
Basic & clinical pharmacology & toxicologyauthors
Schuster F,Tas P,Müller R,Roewer N,Anetseder Mdoi
10.1111/j.1742-7843.2006.pto_250.xsubject
Has Abstractpub_date
2006-04-01 00:00:00pages
372-6issue
4eissn
1742-7835issn
1742-7843pii
PTOpto_250journal_volume
98pub_type
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