PMID- 3712004 OWN - NLM STAT- MEDLINE DCOM- 19860718 LR - 20191101 IS - 0270-6474 (Print) IS - 1529-2401 (Electronic) IS - 0270-6474 (Linking) VI - 6 IP - 6 DP - 1986 Jun TI - Vasopressin mRNA regulation in individual hypothalamic nuclei: a northern and in situ hybridization analysis. PG - 1685-94 AB - The present study examines the relative levels of vasopressin (AVP) mRNA within the paraventricular (PVN), supraoptic (SON), and suprachiasmatic (SCN) nuclei of the rat hypothalamus, and details the rates at which these levels change over the course of a 6 d salt-loading regimen. The quantitation of vasopressin mRNA was achieved by using three different procedures: (1) cell-free translation in rabbit reticulocyte lysate or (2) Northern analysis of poly(A)RNAs isolated from micro-punch dissected SON, PVN, and SCN, and (3) in situ hybridization histochemistry. The former involved the quantitative immunoprecipitation of the neurophysin precursors containing arginine8-vasopressin (AVP) or oxytocin, and the latter two techniques employed a radiolabeled synthetic oligodeoxynucleotide complementary to the 3' region of the AVP mRNA. Both the cell-free studies and the Northern gel analyses detected a sevenfold increase of AVP mRNA in the SON, a fivefold increase in the PVN, and no significant change in the SCN following 6 d of salt-loading. After the initiation of salt-drinking, these increases were shown to occur between 24 and 48 hr in the SON and between 48 and 72 hr in the PVN. The in situ hybridization studies revealed the anatomically correct hybridization of either 32P- or 3H-labeled AVP oligonucleotide to magnocellular perikarya within both the SON and PVN. Autoradiographic grains could be shown to be confined to the cytoplasm of these cells, and could be co-localized with immunoreactivity directed against the carboxy terminus of the AVP percursor. Comparison of x-ray level autoradiograms of control and 6 day salt-loaded SON revealed up to a sevenfold increase in specific signal in the salt-loaded sections. It is concluded that the response of AVP mRNA to osmotic stimuli in the three hypothalamic nuclei is heterogeneous, and that this heterogeneity can be explained by separating AVP neurons into two systems: one responsible for eliciting the antidiuretic actions of AVP via plasma AVP levels, and the other involved in CNS activities not directly involved with antidiuresis. FAU - Sherman, T G AU - Sherman TG FAU - McKelvy, J F AU - McKelvy JF FAU - Watson, S J AU - Watson SJ LA - eng GR - 1F 32 MH09239-01/MH/NIMH NIH HHS/United States GR - F32 MH09239-01/MH/NIMH NIH HHS/United States GR - P30 AM34933-10/AM/NIADDK NIH HHS/United States GR - etc. PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - J Neurosci JT - The Journal of neuroscience : the official journal of the Society for Neuroscience JID - 8102140 RN - 0 (RNA, Messenger) RN - 11000-17-2 (Vasopressins) SB - IM MH - Animals MH - Cell-Free System MH - Hypothalamus/*metabolism MH - Male MH - Nucleic Acid Hybridization MH - RNA, Messenger MH - Rats MH - Rats, Inbred Strains MH - Vasopressins/*metabolism PMC - PMC6568715 EDAT- 1986/06/01 00:00 MHDA- 1986/06/01 00:01 PMCR- 1986/12/01 CRDT- 1986/06/01 00:00 PHST- 1986/06/01 00:00 [pubmed] PHST- 1986/06/01 00:01 [medline] PHST- 1986/06/01 00:00 [entrez] PHST- 1986/12/01 00:00 [pmc-release] AID - 10.1523/JNEUROSCI.06-06-01685.1986 [doi] PST - ppublish SO - J Neurosci. 1986 Jun;6(6):1685-94. doi: 10.1523/JNEUROSCI.06-06-01685.1986.