{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,8]],"date-time":"2026-01-08T15:58:22Z","timestamp":1767887902135,"version":"3.49.0"},"reference-count":35,"publisher":"The Endocrine Society","issue":"7","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2003,7,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Tuberoinfundibular peptide of 39 residues (TIP39) is a recently discovered neuropeptide identified on the basis of its ability to activate the PTH2 receptor, and it is thought to be the brain PTH2 receptor\u2019s endogenous ligand. The PTH2 receptor is highly expressed in the hypothalamus, suggesting a role in the modulation of neuroendocrinological functions. PTHrP, which also belongs to the PTH-related peptides family, stimulates arginine vasopressin (AVP) release. In the present study, therefore, we investigated the effect of centrally administered TIP39 on AVP release in conscious rats. Intracerebroventricular administration of TIP39 (10\u2013500 pmol\/rat) significantly suppressed the plasma AVP concentration in dehydrated rats, and the maximum effect was obtained 5 min after administration (dehydration with 100 pmol\/rat TIP39, 4.32 \u00b1 1.17 pg\/ml; vs. control, 8.21 \u00b1 0.70 pg\/ml). The plasma AVP increase in response to either hyperosmolality [ip injection of hypertonic saline (HS), 600 mosmol\/kg] or hypovolemia [ip injection of polyethylene glycol (PEG)] was also significantly attenuated by an intracerebroventricular injection of TIP39 (HS with 100 pmol\/rat TIP39, 2.65 \u00b1 0.52 pg\/ml; vs. HS alone, 4.69 \u00b1 0.80 pg\/ml; PEG with 100 pmol\/rat TIP39, 4.10 \u00b1 0.79 pg\/ml; vs. PEG alone, 6.19 \u00b1 0.34 pg\/ml). Treatment with naloxone [1.5 mg\/rat, sc injection], a nonselective opioid receptor antagonist, significantly reversed the inhibitory effects of TIP39 on AVP release. These results suggest that central TIP39 plays an inhibitory role in the osmoregulation and baroregulation of AVP release and that intrinsic opioid systems are involved in its mechanism.<\/jats:p>","DOI":"10.1210\/en.2002-0017","type":"journal-article","created":{"date-parts":[[2003,4,15]],"date-time":"2003-04-15T00:14:52Z","timestamp":1050365692000},"page":"2791-2796","source":"Crossref","is-referenced-by-count":28,"title":["Centrally Administered Tuberoinfundibular Peptide of 39 Residues Inhibits Arginine Vasopressin Release in Conscious Rats"],"prefix":"10.1210","volume":"144","author":[{"given":"Yoshihisa","family":"Sugimura","sequence":"first","affiliation":[{"name":"Department of Internal Medicine (Y.S., S.I., K.T., H.A., Y.M., Y.O.), Nagoya University, Graduate School of Medicine, Nagoya, Aichi 466-8550"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Takashi","family":"Murase","sequence":"additional","affiliation":[{"name":"Japan; Research Institute of Environmental Medicine (T.M.), Nagoya University, Nagoya, Aichi 464-8601"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Seiji","family":"Ishizaki","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine (Y.S., S.I., K.T., H.A., Y.M., Y.O.), Nagoya University, Graduate School of Medicine, Nagoya, Aichi 466-8550"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kazushige","family":"Tachikawa","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine (Y.S., S.I., K.T., H.A., Y.M., Y.O.), Nagoya University, Graduate School of Medicine, Nagoya, Aichi 466-8550"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hiroshi","family":"Arima","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine (Y.S., S.I., K.T., H.A., Y.M., Y.O.), Nagoya University, Graduate School of Medicine, Nagoya, Aichi 466-8550"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yoshitaka","family":"Miura","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine (Y.S., S.I., K.T., H.A., Y.M., Y.O.), Nagoya University, Graduate School of Medicine, Nagoya, Aichi 466-8550"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ted B.","family":"Usdin","sequence":"additional","affiliation":[{"name":"Japan; and Laboratory of Genetics (T.B.U.), National Institute of Mental Health, National Institutes of Health, Bethesda, Maryland 20892"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yutaka","family":"Oiso","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine (Y.S., S.I., K.T., H.A., Y.M., Y.O.), Nagoya University, Graduate School of Medicine, Nagoya, Aichi 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