Calmodulin levels in developing muscle tissues and primary cultures of normal and dystrophic (UM-X7.1) hamsters.

Abstract:

:Calmodulin levels have been assessed in whole muscle and primary culture extracts in order to examine the relationship between calmodulin and the accumulation of calcium in dystrophic hamster muscle tissues. Significant decreases in both normal and dystrophic skeletal muscle, tongue, and heart calmodulin levels were observed between 2 and 12 weeks of age. Dystrophic values, however, tended to be somewhat higher than normal, especially in 12-week-old skeletal muscle total and soluble extracts (normal 29.7 and 0.6 and dystrophic 117.0 and 3.1 micrograms/g wet weight, respectively). No significant differences were observed in dystrophic myoblast (total 2.22-2.78, soluble 2.85-3.26 micrograms/mg protein) or fibroblast (total 2.64-2.94, soluble 2.54-3.60 micrograms/mg protein) calmodulin levels, except for a significant decrease in dystrophic fibroblast levels (total 1.97, soluble 2.18 micrograms/mg protein) at 7 days in culture. Elevated calmodulin levels in dystrophic muscle are discussed in terms of increases in intracellular Ca2+ concentrations and immature regenerating fibers.

journal_name

Muscle Nerve

journal_title

Muscle & nerve

authors

Klamut HJ,Kotarba JA,Strickland KP

doi

10.1002/mus.880100113

subject

Has Abstract

pub_date

1987-01-01 00:00:00

pages

69-76

issue

1

eissn

0148-639X

issn

1097-4598

journal_volume

10

pub_type

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