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Full-Text Articles in Medicine and Health Sciences
Ampakines Stimulate Phrenic Motor Output After Cervical Spinal Cord Injury, L. B. Wollman, Kristi A. Streeter, A. F. Fusco, E. J. Gonzalez-Rothi, M. S. Sandhu, J. J. Greer, D. D. Fuller
Ampakines Stimulate Phrenic Motor Output After Cervical Spinal Cord Injury, L. B. Wollman, Kristi A. Streeter, A. F. Fusco, E. J. Gonzalez-Rothi, M. S. Sandhu, J. J. Greer, D. D. Fuller
Physical Therapy Faculty Research and Publications
Activation of α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptors increases phrenic motor output. Ampakines are a class of drugs that are positive allosteric modulators of AMPA receptors. We hypothesized that 1) ampakines can stimulate phrenic activity after incomplete cervical spinal cord injury (SCI), and 2) pairing ampakines with brief hypoxia could enable sustained facilitation of phrenic bursting. Phrenic activity was recorded ipsilateral (IL) and contralateral (CL) to C2 spinal cord hemisection (C2Hx) in anesthetized adult rats. Two weeks after C2Hx, ampakine CX717 (15 mg/kg, i.v.) increased IL (61 ± 46% baseline, BL) and CL burst amplitude (47 ± 26%BL) in 8 of 8 …