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Pharmacologic characterization of opioid peptide release from chromaffin cell transplants using a brain slice superfusion method

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Abstract

A simple chamber and an inexpensive superfusion system for studying mammalian brain slices containing neural transplants is described. With this method, rat brain slices containing bovine chromaffin cell transplants can be maintained for several hours, allowing for the determination of neurochemical characteristics and pharmacologic responsiveness of the grafted cells. Using this technique, basal and nicotine-stimulated release of metenkephalin from rat periaqueductal gray slices containing bovine chromaffin cell transplants were measured. Results showed that met-enkephalin release can be increased by nicotinic stimulation in slices containing chromaffin cell, but not control implants, for at least 8 weeks postimplantation. Furthermore, this response was doserelated. These results are in good agreement with previous behavioral studies and provide corroborative evidence for the mechanism of pain reduction by the release of opioid peptides from chromaffin cell transplants in the periaqueductal gray. This study demonstrates that neurochemical and pharmacologic analyses of neural transplants using a superfused brain slice method can be a complementary approach in determining the underlying mechanisms of neural transplants in the central nervous system.

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  1. Department of Anatomy and Cell Biology, University of Illinois at Chicago, 808 S. Wood St., 60612, Chicago, IL, USA

    John D. Ortega & Jacqueline Sagen

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  1. John D. Ortega
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  2. Jacqueline Sagen
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Ortega, J.D., Sagen, J. Pharmacologic characterization of opioid peptide release from chromaffin cell transplants using a brain slice superfusion method. Exp Brain Res 95, 381–387 (1993). https://doi.org/10.1007/BF00227130

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  • DOI: https://doi.org/10.1007/BF00227130

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