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Full-Text Articles in Medicine and Health Sciences
Blockade Of Neurokinin-1 Receptors In The Ventral Respiratory Column Does Not Affect Breathing But Alters Neurochemical Release, Clarissa Muere, Suzanne Neumueller, Samantha Olesiak, Justin Miller, Matthew Hodges, Lawrence Pan, Hubert Forster
Blockade Of Neurokinin-1 Receptors In The Ventral Respiratory Column Does Not Affect Breathing But Alters Neurochemical Release, Clarissa Muere, Suzanne Neumueller, Samantha Olesiak, Justin Miller, Matthew Hodges, Lawrence Pan, Hubert Forster
Physical Therapy Faculty Research and Publications
Substance P (SP) and its receptor, neurokinin-1 (NK1R), have been shown to be excitatory modulators of respiratory frequency and to stabilize breathing regularity. Studies in anesthetized mice suggest that tonic activation of NK1Rs is particularly important when other excitatory inputs to the pre-Bötzinger complex in the ventral respiratory column (VRC) are attenuated. Consistent with these findings, muscarinic receptor blockade in the VRC of intact goats elicits an increase in breathing frequency associated with increases in SP and serotonin concentrations, suggesting an involvement of these substances in neuromodulator compensation. To gain insight on the contribution to breathing of endogenous SP and …
Evidence For Respiratory Neuromodulator Interdependence After Cholinergic Disruption In The Ventral Respiratory Column, Clarissa Muere, Suzanne Neumueller, Justin Robert Miller, Samantha Olesiak, Matthew Hodges, Lawrence Pan, Hubert Forster
Evidence For Respiratory Neuromodulator Interdependence After Cholinergic Disruption In The Ventral Respiratory Column, Clarissa Muere, Suzanne Neumueller, Justin Robert Miller, Samantha Olesiak, Matthew Hodges, Lawrence Pan, Hubert Forster
Physical Therapy Faculty Research and Publications
Reverse dialysis of the muscarinic receptor antagonist, atropine (ATR, 50 mM), into the pre-Bötzinger Complex region of the ventral respiratory column (VRC) of awake and sleeping goats increases breathing frequency and serotonin (5-HT), substance P (SP), glycine, and GABA concentrations in the effluent dialysate. Herein, we report data from goats in which we reverse dialyzed 5 mM ATR or specific antagonists of M2 or M3 muscarinic receptors into the VRC. The effects on frequency of all three antagonists were not significantly different from time control studies. 5 mM ATR and the M3 antagonist increased SP sevenfold less than 50 mM …