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Titolo:
Activities of phospholipases A and lysophospholipases in glycolytic and oxidative skeletal muscles in the rabbit
Autore:
Alasnier, C; Gandemer, G;
Indirizzi:
Inst Natl Rech Agron, Lab Etud Interact Mol Alimentaires, Lipid Flavor Grp, F-44316 Nantes 3, France Inst Natl Rech Agron Nantes France 3 lavor Grp, F-44316 Nantes 3, France
Titolo Testata:
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
fascicolo: 6, volume: 80, anno: 2000,
pagine: 698 - 704
SICI:
0022-5142(200005)80:6<698:AOPAAL>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
PLASMALOGEN-SELECTIVE PHOSPHOLIPASE-A2; CALCIUM-INDEPENDENT PHOSPHOLIPASE; SUBCELLULAR-LOCALIZATION; MYOCARDIAL-ISCHEMIA; RAT-HEART; PURIFICATION; GLYCEROPHOSPHOLIPIDS; ACTIVATION; MEMBRANE; ENZYMES;
Keywords:
phospholipases A; lysophospholipases; skeletal muscle; metabolic type; lipolysis;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Alasnier, C Unite Nutr Lipid, 17 Rue Sully,BV 1540, F-21034 Dijon, France Unite Nutr Lipid 17 Rue Sully,BV 1540 Dijon France F-21034 ce
Citazione:
C. Alasnier e G. Gandemer, "Activities of phospholipases A and lysophospholipases in glycolytic and oxidative skeletal muscles in the rabbit", J SCI FOOD, 80(6), 2000, pp. 698-704

Abstract

Oxidative muscles contain more free fatty acids than glycolytic muscles, which could explain in part their higher sensitivity to oxidation. These fatty acids are partly the result of phospholipid hydrolysis catalysed by phospholipases A and lysophospholipases. Up to now, very little is known on theactivities of these enzymes in skeletal muscles. This study deals with theactivities of phospholipases A and lysophospholipases in five rabbit muscles covering a large range of metabolic types (oxidative Soleus and Semimembranosus proprius muscles, glycolytic Psoas major and Longissimus lumborum muscles and intermediate Gastrocnemius laterale muscle). The results showed that (a) phospholipases A and lysophospholipases had maximal activity at pH8-9; (b) phospholipases A and lysophospholipases retained more than 50% oftheir maximal activity at pH 5.5-6, the ultimate pH of muscles; (c) lysophospholipases exhibited a higher activity than phospholipases A (4-7-fold higher in the oxidative muscles, 11-fold higher in the intermediate muscle and 18-23-fold higher in the glycolytic muscles); and (d) phospholipase A andlysophospholipase activities were higher in oxidative muscles than in glycolytic muscles (10-25-fold higher for phospholipases A and 4-5-fold higher for lysophospholipases). Thus oxidative muscles have a higher potential activity for post-mortem hydrolysis of phospholipids. (C) 2000 Society of Chemical Industry.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/12/20 alle ore 15:28:31