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Metabolic depression during aestivation does not involve remodelling of membrane fatty acids in two Australian frogs

Journal Article


Abstract


  • Changes in membrane lipid composition (membrane remodelling) have been associated with metabolic

    depression in some aestivating snails but has not been studied in aestivating frogs. This study examined the membrane phospholipid composition of two Australian aestivating frog species Cyclorana alboguttata and Cyclorana australis. The results showed no major membrane remodelling of tissue in either frog species, or in mitochondria of C. alboguttata due to aestivation. Mitochondrial membrane remodelling was not investigated in C. australis. Where investigated in C. alboguttata, total protein and phospholipid

    content, and citrate synthase (CS) and cytochrome c oxidase (CCO) activities in tissues and mitochondria mostly did not change with aestivation in liver. In skeletal muscle, however, CS and CCO activities, mitochondrial and tissue phospholipids, and mitochondrial protein decreased with aestivation. These decreases in muscle indicate that skeletal muscle mitochondrial content may decrease during aestivation. Na+K+ATPase activity of both frog species showed no eVect of aestivation. In C. alboguttata

    diVerent fat diets had a major eVect on both tissue and mitochondrial phospholipid composition indicating an ability to remodel membrane composition that is not utilised in aestivation. Therefore, changes in lipid composition associated with some aestivating snails do not occur during aestivation in these Australian frogs.

Authors


  •   Berner, Nancy J. (external author)
  •   Else, Paul
  •   Hulbert, Tony J.
  •   Mantle, B L. (external author)
  •   Cramp, R L. (external author)
  •   Franklin, C E. (external author)

Publication Date


  • 2009

Citation


  • Berner, N. J., Else, P., Hulbert, A. J., Mantle, B. L., Cramp, R. L. & Franklin, C. E. (2009). Metabolic depression during aestivation does not involve remodelling of membrane fatty acids in two Australian frogs. Journal of Comparative Physiology B: biochemical, systemic, and environmental physiology, 179 (7), 857-866.

Scopus Eid


  • 2-s2.0-70350164127

Ro Metadata Url


  • http://ro.uow.edu.au/hbspapers/1744

Number Of Pages


  • 9

Start Page


  • 857

End Page


  • 866

Volume


  • 179

Issue


  • 7

Place Of Publication


  • http://springerlink.com/content/j32h19045271t137/fulltext.pdf

Abstract


  • Changes in membrane lipid composition (membrane remodelling) have been associated with metabolic

    depression in some aestivating snails but has not been studied in aestivating frogs. This study examined the membrane phospholipid composition of two Australian aestivating frog species Cyclorana alboguttata and Cyclorana australis. The results showed no major membrane remodelling of tissue in either frog species, or in mitochondria of C. alboguttata due to aestivation. Mitochondrial membrane remodelling was not investigated in C. australis. Where investigated in C. alboguttata, total protein and phospholipid

    content, and citrate synthase (CS) and cytochrome c oxidase (CCO) activities in tissues and mitochondria mostly did not change with aestivation in liver. In skeletal muscle, however, CS and CCO activities, mitochondrial and tissue phospholipids, and mitochondrial protein decreased with aestivation. These decreases in muscle indicate that skeletal muscle mitochondrial content may decrease during aestivation. Na+K+ATPase activity of both frog species showed no eVect of aestivation. In C. alboguttata

    diVerent fat diets had a major eVect on both tissue and mitochondrial phospholipid composition indicating an ability to remodel membrane composition that is not utilised in aestivation. Therefore, changes in lipid composition associated with some aestivating snails do not occur during aestivation in these Australian frogs.

Authors


  •   Berner, Nancy J. (external author)
  •   Else, Paul
  •   Hulbert, Tony J.
  •   Mantle, B L. (external author)
  •   Cramp, R L. (external author)
  •   Franklin, C E. (external author)

Publication Date


  • 2009

Citation


  • Berner, N. J., Else, P., Hulbert, A. J., Mantle, B. L., Cramp, R. L. & Franklin, C. E. (2009). Metabolic depression during aestivation does not involve remodelling of membrane fatty acids in two Australian frogs. Journal of Comparative Physiology B: biochemical, systemic, and environmental physiology, 179 (7), 857-866.

Scopus Eid


  • 2-s2.0-70350164127

Ro Metadata Url


  • http://ro.uow.edu.au/hbspapers/1744

Number Of Pages


  • 9

Start Page


  • 857

End Page


  • 866

Volume


  • 179

Issue


  • 7

Place Of Publication


  • http://springerlink.com/content/j32h19045271t137/fulltext.pdf