Role of opioid receptor like-1 receptor in modulation of endocrine, immunological, and behavioral responses to the T-cell superantigen staphylococcal enterotoxin A.
Opioid receptor like-1 receptor (ORL(1)) is selective for orphaninFQ/nociceptin (OFQ/N), a peptide linked to stress. Since immunologic stimuli exert stressor-like effects, the neuroendocrine and behavioral effects of the T-cell superantigen staphylococcal enterotoxin A (SEA) were tested in ORL(1)(-/-) and ORL(1)(+/+) wildtype 129S6 mice. Within 2h of SEA challenge both genotypes showed elevated corticosterone, but only wildtypes were elevated after 4h, and had altered hypothalamic CRH mRNA. Although amygdaloid CRH and TNFalpha mRNA was increased by SEA, this did not vary with genotype. Interestingly, gustatory neophobia due to SEA challenge was augmented in ORL(1)(-/-) mice, although object neophobia tested 4days later was abrogated. These results suggest differential requirements for ORL(1) in the mediation of neuroimmune effects exerted at different times after an immune challenge.
Mallimo
Elyse M
EM
Department of Psychology, Behavioral Neuroscience Program, Rutgers University, 152 Frelinghuysen Road, Piscataway, NJ 08854, United States.
Ansonoff
Mike A
MA
Pintar
John E
JE
Kusnecov
Alexander W
AW
D000818:Animals; D001522:Behavior, Animal / Q000187:drug effects*; D001921:Brain / Q000187:drug effects* / Q000276:immunology / Q000378:metabolism; D003345:Corticosterone / Q000097:blood; D003346:Corticotropin-Releasing Hormone / Q000096:biosynthesis / Q000187:drug effects; D016207:Cytokines / Q000096:biosynthesis / Q000187:drug effects / Q000276:immunology; D004435:Eating / Q000187:drug effects; D004768:Enterotoxins / Q000494:pharmacology*; D007030:Hypothalamo-Hypophyseal System / Q000187:drug effects / Q000276:immunology / Q000378:metabolism; D008297:Male; D051379:Mice; D018345:Mice, Knockout; D015213:Neuroimmunomodulation / Q000187:drug effects*; D010913:Pituitary-Adrenal System / Q000187:drug effects / Q000276:immunology / Q000378:metabolism; D012333:RNA, Messenger / Q000032:analysis; D011957:Receptors, Opioid / Q000502:physiology*; D018124:Receptors, Tumor Necrosis Factor / Q000096:biosynthesis / Q000187:drug effects; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013154:Spleen / Q000187:drug effects / Q000276:immunology; D014409:Tumor Necrosis Factor-alpha / Q000096:biosynthesis / Q000187:drug effects; D000094942:Nociceptin Receptor
D016207:Cytokines; D004768:Enterotoxins; D012333:RNA, Messenger; D011957:Receptors, Opioid; D018124:Receptors, Tumor Necrosis Factor; D014409:Tumor Necrosis Factor-alpha; C026066:enterotoxin A, Staphylococcal; D003346:Corticotropin-Releasing Hormone; D003345:Corticosterone; D000094942:Nociceptin Receptor; C000722287:Oprl1 protein, mouse