Abstract
The effect of intraplantarly (i.pl.)-injected methionine-enkephalin (ME) on Concanavalin A (Con A)-induced paw edema in Dark Agouti (DA) and Albino Oxford (AO) rats was investigated. ME suppressed edema in DA rats, which was antagonized with naloxone (non-selective opioid receptor antagonist) and naltrindole (δ opioid receptors antagonist). Potentiating effect of ME in AO rats was blocked by naloxone, nor-binaltorphimine (κ opioid receptors antagonist) and β-funaltrexamine (μ opioid receptors antagonist). Dexamethasone suppressed edema in both rat strains. These findings suggest that strain-dependent differences in the effects of ME on inflammation in DA and AO rats could be related to diversity in opioid receptors expression in these strains.
Original language | English (US) |
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Pages (from-to) | 1597-1605 |
Number of pages | 9 |
Journal | Peptides |
Volume | 23 |
Issue number | 9 |
DOIs | |
State | Published - Sep 2002 |
Externally published | Yes |
Keywords
- Concanavalin A
- Methionine-enkephalin
- Naloxone
- Naltrindole
- Paw edema
- Rat strain
- nor-Binaltorphimine
- β-Funaltrexamine
- δ, κ, μ Opioid receptors
ASJC Scopus subject areas
- Biochemistry
- Physiology
- Endocrinology
- Cellular and Molecular Neuroscience