Proopiomelanocortin opioids in brain, CSF, and plasma of piglets during hypoxia
beta-Endorphin-like immunoreactivity (BELI), containing the biologically active beta-endorphin, its precursor beta-lipotropin (BLP), and deactivated product N-acetyl-beta-endorphin (ABE), were measured by radioimmunoassay in plasma, cerebrospinal fluid (CSF), and in a dorsal medullary slice containi...
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Published in | Journal of applied physiology (1985) Vol. 66; no. 5; p. 2280 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
United States
01.05.1989
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Abstract | beta-Endorphin-like immunoreactivity (BELI), containing the biologically active beta-endorphin, its precursor beta-lipotropin (BLP), and deactivated product N-acetyl-beta-endorphin (ABE), were measured by radioimmunoassay in plasma, cerebrospinal fluid (CSF), and in a dorsal medullary slice containing the respiratory-related nucleus tractus solitarius (dmscNTS) of young and older piglets in normoxia and hypoxia. Significant increase with hypoxia occurred in the levels of BLP in the plasma and CSF and of BELI and ABE in the plasma of the young group. In the older group, such increases occurred in ABE levels of the dmscNTS, in BLP and ABE levels of the CSF, and in plasma BELI. Estimated levels of pure beta-endorphin were higher in the CSF of young piglets during both control and hypoxia. With hypoxia, these estimated levels increased significantly in the plasma of the young age group but showed only a borderline increase in the old group. It is possible that higher opioid levels in the CSF of young as compared with older neonates, enhanced by a greater opioid increase in their plasma during hypoxia, may help explain the suppressed respiratory response to hypoxia of the newborn. |
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AbstractList | beta-Endorphin-like immunoreactivity (BELI), containing the biologically active beta-endorphin, its precursor beta-lipotropin (BLP), and deactivated product N-acetyl-beta-endorphin (ABE), were measured by radioimmunoassay in plasma, cerebrospinal fluid (CSF), and in a dorsal medullary slice containing the respiratory-related nucleus tractus solitarius (dmscNTS) of young and older piglets in normoxia and hypoxia. Significant increase with hypoxia occurred in the levels of BLP in the plasma and CSF and of BELI and ABE in the plasma of the young group. In the older group, such increases occurred in ABE levels of the dmscNTS, in BLP and ABE levels of the CSF, and in plasma BELI. Estimated levels of pure beta-endorphin were higher in the CSF of young piglets during both control and hypoxia. With hypoxia, these estimated levels increased significantly in the plasma of the young age group but showed only a borderline increase in the old group. It is possible that higher opioid levels in the CSF of young as compared with older neonates, enhanced by a greater opioid increase in their plasma during hypoxia, may help explain the suppressed respiratory response to hypoxia of the newborn. |
Author | Moss, I R Inman, J G |
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BackLink | https://www.ncbi.nlm.nih.gov/pubmed/2745291$$D View this record in MEDLINE/PubMed |
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SubjectTerms | Aging Animals Animals, Newborn Brain - growth & development Brain Chemistry Hypoxia - metabolism Pro-Opiomelanocortin - analysis Pro-Opiomelanocortin - blood Pro-Opiomelanocortin - cerebrospinal fluid Swine - growth & development Swine, Miniature - growth & development |
Title | Proopiomelanocortin opioids in brain, CSF, and plasma of piglets during hypoxia |
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