alpha-neoendorphin has been researched along with Pain* in 3 studies
1 review(s) available for alpha-neoendorphin and Pain
Article | Year |
---|---|
Functional response of multiple opioid systems to chronic arthritic pain in the rat.
Topics: 3,4-Dichloro-N-methyl-N-(2-(1-pyrrolidinyl)-cyclohexyl)-benzeneacetamide, (trans)-Isomer; Animals; Arthritis; Arthritis, Experimental; Benzomorphans; beta-Endorphin; Dynorphins; Endorphins; Enkephalin, Leucine; Enkephalin, Methionine; Morphine; Naloxone; Nociceptors; Pain; Pituitary Gland, Anterior; Protein Precursors; Pyrrolidines; Rats; Receptors, Opioid; Sensory Thresholds; Spinal Cord; Thalamus | 1986 |
2 other study(ies) available for alpha-neoendorphin and Pain
Article | Year |
---|---|
Spinal astrocytes produce and secrete dynorphin neuropeptides.
Dynorphin peptide neurotransmitters (neuropeptides) have been implicated in spinal pain processing based on the observations that intrathecal delivery of dynorphin results in proalgesic effects and disruption of extracellular dynorphin activity (by antisera) prevents injury evoked hyperalgesia. However, the cellular source of secreted spinal dynorphin has been unknown. For this reason, this study investigated the expression and secretion of dynorphin-related neuropeptides from spinal astrocytes (rat) in primary culture. Dynorphin A (1-17), dynorphin B, and α-neoendorphin were found to be present in the astrocytes, illustrated by immunofluorescence confocal microscopy, in a discrete punctate pattern of cellular localization. Measurement of astrocyte cellular levels of these dynorphins by radioimmunoassays confirmed the expression of these three dynorphin-related neuropeptides. Notably, BzATP (3'-O-(4-benzoyl)benzoyl adenosine 5'-triphosphate) and KLA (di[3-deoxy-D-manno-octulosonyl]-lipid A) activation of purinergic and toll-like receptors, respectively, resulted in stimulated secretion of dynorphins A and B. However, α-neoendorphin secretion was not affected by BzATP or KLA. These findings suggest that dynorphins A and B undergo regulated secretion from spinal astrocytes. These findings also suggest that spinal astrocytes may provide secreted dynorphins that participate in spinal pain processing. Topics: Adenosine Triphosphate; Animals; Astrocytes; Cells, Cultured; Dynorphins; Endorphins; Extracellular Space; Female; Fluorescent Antibody Technique; Glial Fibrillary Acidic Protein; Immunohistochemistry; Microscopy, Confocal; Neuropeptides; Pain; Pregnancy; Protein Precursors; Rats; Rats, Sprague-Dawley; Receptors, Purinergic P2X; Spinal Cord; Toll-Like Receptor 4 | 2013 |
Evidence for a role of the ventro-medial posterior hypothalamus in nociceptive processes in the rat.
Bilateral, radio-frequency destruction of the ventro-medial posterior hypothalamus (VMPH) resulted, as compared to sham-operated and control rats and evaluated in the tail-flick and vocalization tests, in a significant decrease in basal nociceptive threshold on day 4 post-surgery. By day 12, however, no significant difference between sham and lesioned rats was seen. At this time the antinociception elicited by either acute foot-shock or cold-water-immersion stress was profoundly attenuated. The antinociceptive response to various doses of morphine was not, in contrast, diminished. As established by use of radioimmunoassay, these lesions did not significantly alter hypothalamic levels of beta-endorphin, met-enkephalin, dynorphin or alpha-neo-endorphin. They did, however, produce a pronounced and significant fall in the hypothalamic content of substance P. These data are indicative that the VMPH may, via a mechanism not involving endorphins, be of importance in the determination of basal nociceptive threshold and in the generation of stress-, but not morphine-, evoked antinociception. The relationship of these findings to the interconnections of the VMPH, and to the possible significance of substance P and the pituitary in nociceptive processes, is discussed. Topics: Animals; beta-Endorphin; Dynorphins; Electroshock; Endorphins; Enkephalin, Methionine; Hypothalamus; Hypothalamus, Posterior; Male; Morphine; Naltrexone; Nociceptors; Pain; Protein Precursors; Rats; Rats, Inbred Strains; Stereotaxic Techniques | 1983 |