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  • Title: Orexin-B-like immunoreactivity localized in both luteinizing hormone- and thyroid-stimulating hormone-containing cells in the Nile tilapia (Oreochromis niloticus) pituitary.
    Author: Suzuki H, Matsumoto A, Yamamoto T.
    Journal: Tissue Cell; 2009 Feb; 41(1):75-8. PubMed ID: 18656218.
    Abstract:
    Immunohistochemical techniques were employed to examine orexin-like immunoreactivities in the pituitary of the Nile tilapia (Oreochromis niloticus). Rabbit anti-orexin-A serum and mouse anti-orexin-B monoclonal antibodies were used as primary antibodies. Orexin-B immunoreactive cells corresponded to luteinizing hormone (LH)- or thyroid-stimulating hormone (TSH)-containing cells, and all LH- and TSH-containing cells were immunoreactive for orexin-B. However, we found no orexin-A immunoreactive cells in the pituitary. In the Nile tilapia, an orexin-B-like substance may be secreted from LH- or TSH-containing cells and may regulate pituitary function, rather than the orexin-A-like substance in the pituitaries of Japanese seaperch and medaka.
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