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pubmed-article:2305611pubmed:abstractTextCalcium accumulation by the sarcoplasmic reticulum in whole muscle homogenate preparations of malignant hyperthermia-susceptible (MH+) and non-susceptible (MH-) humans and pigs was investigated using a calcium electrode at 35 degrees C. Sarcoplasmic reticulum of MH+ humans and pigs showed normal Ca2+ accumulation, with no difference being observed in the rate and the time taken to achieve maximal accumulation. However, the capacity for Ca2+ accumulation by the sarcoplasmic reticulum in MH+ humans and pigs is considerably less stable than normal after prolonged ageing of the whole muscle homogenate preparations in ice. In MH+ patients, the capacity for Ca2+ accumulation by the sarcoplasmic reticulum showed a decline of 62% at 22 h ageing and 70% at 48 h ageing, as compared with a reduction of only 23% in MH- patients. In MH+ pigs, the sarcoplasmic reticulum showed a 96% deterioration in the capacity for Ca2+ accumulation as compared with a loss of only 40% in MH- pigs at 7 h ageing in ice. In both humans and pigs, the decline in Ca2+ accumulation was prevented by incubating the whole muscle homogenate preparations for 2 h at 35 degrees C prior to ageing the preparations. The diminished Ca2+ accumulating capacity of the sarcoplasmic reticulum in whole muscle homogenate preparations of MH-susceptible individuals in our experimental protocol provides a potential diagnostic test for malignant hyperthermia susceptibility.lld:pubmed
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pubmed-article:2305611pubmed:authorpubmed-author:RosenbergHHlld:pubmed
pubmed-article:2305611pubmed:authorpubmed-author:FletcherJ EJElld:pubmed
pubmed-article:2305611pubmed:authorpubmed-author:CheahK SKSlld:pubmed
pubmed-article:2305611pubmed:authorpubmed-author:CheahA MAMlld:pubmed
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pubmed-article:2305611pubmed:volume34lld:pubmed
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pubmed-article:2305611pubmed:pagination114-9lld:pubmed
pubmed-article:2305611pubmed:dateRevised2007-11-14lld:pubmed
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pubmed-article:2305611pubmed:year1990lld:pubmed
pubmed-article:2305611pubmed:articleTitleCalcium accumulation by sarcoplasmic reticulum in whole muscle homogenate preparations of malignant hyperthermia diagnostic patients and pigs.lld:pubmed
pubmed-article:2305611pubmed:affiliationDepartment of Anesthesiology, Hahnemann University, Philadelphia.lld:pubmed
pubmed-article:2305611pubmed:publicationTypeJournal Articlelld:pubmed
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pubmed-article:2305611pubmed:publicationTypeResearch Support, U.S. Gov't, P.H.S.lld:pubmed
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