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We examined whether early injury-associated activation of cyclic AMP response element binding protein (CREB) in the spinal dorsal horn was mediated by the cyclic AMP-dependent protein kinase A (PKA) pathway. Significant increases in the levels of phosphorylated CREB (pCREB), phosphorylated PKAIIalpha regulatory subunit (pPKA), and PKAalpha catalytic subunit(More)
Plasticity in the spinal dorsal horn may underlie the development of chronic pain following peripheral nerve injury or inflammation. In this study, we examined whether chronic constriction injury of the sciatic nerve was associated with changes in the immunoreactive content of cyclic AMP response element binding protein (CREB), protein kinase A (PKA), and(More)
Extracellular recordings were used to characterize responses to cutaneous mechanical stimulation of 78 neurons in the rat nucleus submedius (SM). Thirty-nine of these units were activated by some type of cutaneous mechanical stimulation. Eighteen cells were activated exclusively by noxious stimuli. In 13 of these cells, responses were of swift onset and(More)
Phosphorylation of the cyclic AMP response element-binding protein (CREB) in the spinal dorsal horn may critically contribute to chronic pain following peripheral nerve injury. We employed inhibitors and activators of protein kinase A (PKA), protein kinase C (PKC), extracellular signal-regulated kinase 1 and 2 (ERK1/2) and calcium/calmodulin-dependent(More)
Significant decreases in the protein levels of potassium-chloride co-transporter 2 (KCC2) were detected in the ipsilateral spinal dorsal horn 4h following loose ligation of the sciatic nerve. These decreases were associated with a change in hindlimb weight distribution suggestive of pain behavior. In contrast, no changes in GABA-A receptor subunit alpha-1(More)
STUDY DESIGN Laboratory investigation of pain behavior following spinal cord injury. OBJECTIVE To explore changes in the spinal cord expression of nociceptive genes following spinal cord injury (SCI) as they relate to the manifestation of pain behavior in rats. SUMMARY OF BACKGROUND DATA Neuropathic pain following SCI is common, disabling, and largely(More)
Thyrotropin-releasing hormone-like immunoreactivity was demonstrated in neurons within the superficial laminae (I, II, III) of the mouse spinal dorsal horn by light-microscopic peroxidase immunocytochemistry. The immunoreactivity was distributed in a narrow dorsoventral band that enclosed the substantia gelatinosa (lamina II), with a higher concentration(More)
OBJECTIVE To test the hypothesis that butorphanol or morphine induces antinociception with minimal respiratory depression in conscious red-eared slider turtles. DESIGN Prospective crossover study. ANIMALS 37 adult male and female red-eared slider turtles (Trachemys scripta). PROCEDURES Antinociception (n = 27 turtles) and respiratory (10 turtles)(More)