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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Susuki, K. Chaki, K. Kawamura, S. Sasaki, Y. Sato, T. Sakurada, S. Sakurada, T. Kisara, K. |
| Description | Author Affiliation: Chaki K ( Department of Pharmacology, Tohoku College of Pharmacy, Sendai, Japan.) |
| Abstract | 1. The antinociceptive effects of [D-Arg2] dermorphin tetrapeptide analogues, H-Tyr-D-Arg-Phe-Gly-NH2 and H-Tyr-D-Arg-Phe-beta-Ala-OH when administered subcutaneously (s.c.) in rats were measured by the tail-flick test. In addition, the appearance of typical withdrawal signs upon cessation of administration or on subsequent treatment with naloxone were measured after chronic administration of either peptide or morphine. 2. The dose of peptides and of morphine in the physical dependence test was determined from the AD50 to inhibit the tail-flick test in rats. Doses from 4 to 64 times the AD50 doses were employed in the s.c. administration schedules. 3. The intensity of the antinociception induced by either peptide was greater than that produced by morphine. Moreover, the antinociception induced by the peptides was of much longer duration than that produced by morphine. 4. Abrupt withdrawal after chronic administration of either peptide produced only slight loss of body weight. In contrast, morphine withdrawal produced sharp loss of body weight. 5. Naloxone precipitated withdrawal signs after chronic administration of either peptide were less intense than those after chronic morphine. 6. These results suggest that the antinociception produced by these peptides is more intense and of longer duration than that produced by morphine. It is also interesting to note that the physical dependence produced by these peptides is less marked than that produced by morphine. |
| ISSN | 00071188 |
| e-ISSN | 14765381 |
| Journal | British Journal of Pharmacology |
| Issue Number | 1 |
| Volume Number | 95 |
| Language | English |
| Publisher | Wiley Online Library(on behalf of The British Pharmacological Society) |
| Publisher Date | 1988-09-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | Open |
| Subject Keyword | Analgesics, Opioid Pharmacology Analgesics Morphine Dependence Physiopathology Oligopeptides Substance-Related Disorders Animals Body Weight Drug Effects Naloxone Rats, Inbred Strains Reaction Time Substance Withdrawal Syndrome Time Factors |
| Content Type | Text |
| Resource Type | Article |
| Subject | Pharmacology |
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