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Neuropeptide Y (NPY) neurons in the arcuate nucleus (ARH) and dorsomedial nucleus (DMH), areas activated during lactation, project to the paraventricular nucleus of the hypothalamus (PVH).
Regul Pept. 1998 Sep 25; 75-76:93-100.RP

Abstract

Lactation induces an increase in NPY activity in two neuronal populations in the hypothalamus: the arcuate nucleus (ARH) and the dorsomedial nucleus (DMH) area. To determine if NPY neurons from these areas project to the paraventricular nucleus of the hypothalamus (PVH), the retrograde tracer, fluorogold (FG), was injected into the PVH of lactating females. FG-labeled NPY cells (identified by in situ hybridization for NPY mRNA) were observed throughout the ARH; however, a greater number of double-labeled cells were found in the caudal portion than the rostral portion of the ARH. Thus, NPY neurons in the caudal portion of the ARH provide the major ARH NPY input into the PVH area. If these results are combined with our previous data showing that activation of NPY neurons in the ARH during lactation is confined to the caudal portion, it is very likely that the lactation-activated NPY neurons project to the PVH. FG-labeled NPY cells were also identified in the DMH area, providing the first evidence that the NPY neurons in the DMH area activated during lactation also project to the PVH. Taken together, the increase in NPY activity may be important in modulating some of the physiological alterations occurring during lactation, such as the increase in food intake, in part through modulating PVH neuronal activity.

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Authors+Show Affiliations

Li C
Division of Neuroscience, Oregon Regional Primate Research Center, Beaverton 97006, USA.
Chen P
No affiliation info available
Smith MS
No affiliation info available

MeSH

AnimalsArcuate Nucleus of HypothalamusDorsomedial Hypothalamic NucleusFemaleHypothalamusImmunohistochemistryIn Situ HybridizationLactationNeuronsNeuropeptide YParaventricular Hypothalamic NucleusPregnancyRNA, MessengerRatsRats, Sprague-Dawley

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, P.H.S.

Language

eng

PubMed ID

9802398

Citation

Li, C, et al. "Neuropeptide Y (NPY) Neurons in the Arcuate Nucleus (ARH) and Dorsomedial Nucleus (DMH), Areas Activated During Lactation, Project to the Paraventricular Nucleus of the Hypothalamus (PVH)." Regulatory Peptides, vol. 75-76, 1998, pp. 93-100.
Li C, Chen P, Smith MS. Neuropeptide Y (NPY) neurons in the arcuate nucleus (ARH) and dorsomedial nucleus (DMH), areas activated during lactation, project to the paraventricular nucleus of the hypothalamus (PVH). Regul Pept. 1998;75-76:93-100.
Li, C., Chen, P., & Smith, M. S. (1998). Neuropeptide Y (NPY) neurons in the arcuate nucleus (ARH) and dorsomedial nucleus (DMH), areas activated during lactation, project to the paraventricular nucleus of the hypothalamus (PVH). Regulatory Peptides, 75-76, 93-100.
Li C, Chen P, Smith MS. Neuropeptide Y (NPY) Neurons in the Arcuate Nucleus (ARH) and Dorsomedial Nucleus (DMH), Areas Activated During Lactation, Project to the Paraventricular Nucleus of the Hypothalamus (PVH). Regul Pept. 1998 Sep 25;75-76:93-100. PubMed PMID: 9802398.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Neuropeptide Y (NPY) neurons in the arcuate nucleus (ARH) and dorsomedial nucleus (DMH), areas activated during lactation, project to the paraventricular nucleus of the hypothalamus (PVH). AU - Li,C, AU - Chen,P, AU - Smith,M S, PY - 1998/11/5/pubmed PY - 1998/11/5/medline PY - 1998/11/5/entrez SP - 93 EP - 100 JF - Regulatory peptides JO - Regul Pept VL - 75-76 N2 - Lactation induces an increase in NPY activity in two neuronal populations in the hypothalamus: the arcuate nucleus (ARH) and the dorsomedial nucleus (DMH) area. To determine if NPY neurons from these areas project to the paraventricular nucleus of the hypothalamus (PVH), the retrograde tracer, fluorogold (FG), was injected into the PVH of lactating females. FG-labeled NPY cells (identified by in situ hybridization for NPY mRNA) were observed throughout the ARH; however, a greater number of double-labeled cells were found in the caudal portion than the rostral portion of the ARH. Thus, NPY neurons in the caudal portion of the ARH provide the major ARH NPY input into the PVH area. If these results are combined with our previous data showing that activation of NPY neurons in the ARH during lactation is confined to the caudal portion, it is very likely that the lactation-activated NPY neurons project to the PVH. FG-labeled NPY cells were also identified in the DMH area, providing the first evidence that the NPY neurons in the DMH area activated during lactation also project to the PVH. Taken together, the increase in NPY activity may be important in modulating some of the physiological alterations occurring during lactation, such as the increase in food intake, in part through modulating PVH neuronal activity. SN - 0167-0115 UR - https://www.unboundmedicine.com/medline/citation/9802398/Neuropeptide_Y__NPY__neurons_in_the_arcuate_nucleus__ARH__and_dorsomedial_nucleus__DMH__areas_activated_during_lactation_project_to_the_paraventricular_nucleus_of_the_hypothalamus__PVH__ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0167-0115(98)00057-3 DB - PRIME DP - Unbound Medicine ER -