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January 24, 2010 | History

Molecular signals and GLUT4 dynamics associated with glucose transport into skeletal muscle 1 edition

Molecular signals and GLUT4 dynamics associated with glucose transport ...
Nadeeja T. Wijesekara

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Molecular signals and GLUT4 dynamics associated with glucose transport into skeletal muscle.

Published 2005 .
Written in English.

About the Book

The molecular signals and glucose transporter-4 (GLUT4) dynamics associated with exercise/contraction-stimulated glucose transport into skeletal muscle are not completely understood. The trigger to muscle contraction is membrane depolarization. Therefore, we explored the molecular mechanisms and GLUT4 traffic properties participating in K+ depolarization-stimulated glucose transport using L6-GLUT4myc cells. We observed that Ca2+ chelators and inhibitors to conventional PKC prevented K+ depolarization-induced effects. We further observed that depolarization largely reduces GLUT4 internalization. Lack of a contractile apparatus in L6-GLUT4myc cells requires us to study contraction-mediated glucose transport in intact skeletal muscle. The impasse is the lack of an accurate method for measuring surface GLUT4 in mature tissue. Therefore, we attempted to establish a biochemical assay using transgenic mice expressing GLUT4myc in skeletal muscle. Although the proposed carry-over assay efficiently detected GLUT4 translocation in L6-GLUT4myc cells, further modifications are required before insulin-stimulated GLUT4 translocation can be successfully measured in isolated GLUT4myc skeletal muscle.

Edition Notes

Source: Masters Abstracts International, Volume: 44-02, page: 0737.

Thesis (M.Sc.)--University of Toronto, 2005.

Electronic version licensed for access by U. of T. users.

GERSTEIN MICROTEXT copy on microfiche (2 microfiches).

The Physical Object

121 leaves.
Number of pages

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