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Effect of hypoxia on protein composition of synaptic plasma membranes from cerebral cortex during aging

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Abstract

The effect of hypoxia on the protein composition of synaptic plasma membranes (SPM) isolated from cerebral cortex of rats at 4, 12, and 24 months of age was investigated. The proteins were separated by SDS polyacrilamide gel electrophoresis and the percent content was evaluated by measuring the optical density of the stained gels. After hypoxic treatment various proteins showed significant changes. Some proteins were only affected at 4 and 12 months of age and not at 24 months. The various modified porteins may be identified according to their molecular weight, as follows: the 18 kDa protein with calmodulin; the 23 kDa protein with D3 subunits; the 28 kDa protein could contain the δ subunit of the Ca2+ channel. The changes in the amount of some SPM proteins during hypoxia is consistent with the alteration in membrane polarization and neurotransmission observed in this condition. The effect of aging at the synaptosomal level seems to be a selective process; after hypoxia the age-related changes of many proteins are more pronounced.

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Authors and Affiliations

  1. Institute of Pharmacology, Faculty of Science, University of Pavia, Pavia, Italy

    Roberto F. Villa & Antonella Gorini

  2. Department of Biochemistry, University of Oulu, Oulu, Finland

    Leena Turpeenoja

  3. Institute of Biochemistry, Faculty of Medicine, University of Catania, 95125, Catania, Italy

    Grazia Magrì, Nicolò Ragusa & Anna Maria Giuffrida-Stella

Authors
  1. Roberto F. Villa
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  2. Leena Turpeenoja
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  3. Grazia Magrì
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  4. Antonella Gorini
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  5. Nicolò Ragusa
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  6. Anna Maria Giuffrida-Stella
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Special issue dedicated to Dr. Santiago Grisolia

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Villa, R.F., Turpeenoja, L., Magrì, G. et al. Effect of hypoxia on protein composition of synaptic plasma membranes from cerebral cortex during aging. Neurochem Res 16, 827–832 (1991). https://doi.org/10.1007/BF00965693

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