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Related Experiment Videos

Calpain II in rat peripheral nerve.

M Mata1, N Kupina, D J Fink

  • 1Department of Neurology, University of Michigan, Ann Arbor.

Brain Research
|November 15, 1991
PubMed
Summary

Researchers investigated calpain II distribution in rat sciatic nerves using a specific antibody. The enzyme was found in Schwann cells and nerve axoplasm, offering insights into its role in nerve function.

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Area of Science:

  • Neuroscience
  • Cell Biology

Background:

  • Calpain II is a calcium-dependent protease implicated in various cellular processes.
  • Understanding the distribution of calpain II is crucial for elucidating its function in the nervous system.

Purpose of the Study:

  • To determine the precise localization of calpain II within the rat sciatic nerve.
  • To investigate the cellular compartments where calpain II is present.

Main Methods:

  • Utilized a polyclonal antiserum specific to calpain II for immunolocalization studies.
  • Performed Western blot analysis to confirm antibody specificity and identify the enzyme's molecular weight.
  • Employed light and electron microscopy to visualize calpain II distribution at the cellular and subcellular levels.

Main Results:

  • Western blot confirmed the antibody's reactivity with an 80 kDa protein band, identified as the catalytic subunit of calpain II.
  • Immunoreactivity for calpain II was predominantly observed in the cytoplasm of Schwann cells.
  • Electron microscopy revealed dense localization of calpain II along the Schwann cell plasmalemma and also within the axoplasm.

Conclusions:

  • Calpain II is present in both Schwann cells and the axoplasm of the rat sciatic nerve.
  • The observed distribution suggests potential roles for calpain II in Schwann cell function and axonal processes.
  • Further research is warranted to explore the specific functions of calpain II in peripheral nerve physiology and pathology.

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