Expression and localization of insulin receptors in dissociated primary cultures of rat Schwann cells

Authors

  • Abhijth Ravindranath Shetter,

    1. Department of Biochemistry, Davangere University, Shivagangotri campus, Davangere 577002, Karnataka, India
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  • Gopal Muttagi,

    Corresponding author
    1. Department of Biochemistry, Davangere University, Shivagangotri campus, Davangere 577002, Karnataka, India
      To whom correspondence should be addressed (email muttagigopal@yahoo.co.in).
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  • Chandrasekhar Bhadravathi Kenchappa Sagar

    1. EM facility, Department of Neuropathology, National Institute of Mental Health and Neurosciences, Bangalore 560029, Karnataka, India
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To whom correspondence should be addressed (email muttagigopal@yahoo.co.in).

Abstract

The objective of the present study was to examine for the presence of the IRs (insulin receptors) in the primary dissociated culture preparation of SCs (Schwann cells). This was achieved using immunological techniques using a rabbit polyclonal anti-IR antibody and at molecular level by RT (reverse transcription)-PCR. Light microscopic immune cytochemistry revealed that almost all SCs in cluster and associated neuritis exhibited positive immune reaction with the antibody, confirming the presence of IRs in them. Immunoblotting detected a prominent protein band of 90 kDa, which is consistent with those reported by the manufacturer. Like the peripheral nerve, primary SC cultures showed a predominantly high affinity IR mRNA lacking exon 11. Ultrastructural immune localization confined the presence of the IRs in the basal lamina, plasma membrane and the cytoplasmic processes of the SCs.

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