© 1993 Oxford University Press
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Gap-junction protein gene suppresses tumorigenicity
University of Miami School of Medicine, Department of Physiology and Biophysics Miami, FL 33136, USA
Prompted by the notion that the membrane channels in gap junctions conduct growth-regulating signals from cell to cell, we transferred the
1 gene for the channel protein (connexin43) of rat heart to tumorigenic mouse MCA-10 cells. Upon incorporation into the cell genome, this exogenous gene was expressed, resulting in functional channels and normal growth regulation: cellcell communication, determined with a channel-permeant 400-dalton fluorescent tracer, was increased and tumorigenicity, determined in nude mice, was suppressed.
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