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  • Title: Role of opioid receptor like-1 receptor in modulation of endocrine, immunological, and behavioral responses to the T-cell superantigen staphylococcal enterotoxin A.
    Author: Mallimo EM, Ansonoff MA, Pintar JE, Kusnecov AW.
    Journal: J Neuroimmunol; 2010 Jan 25; 218(1-2):48-56. PubMed ID: 19913923.
    Abstract:
    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.
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