introduction: numerous studies have demonstrated that kisspeptin, a peptide from the kiss1 gene, plays an important role in regulating the secretion of gonadotropin releasing hormone (gnrh). also, there is some evidence suggesting that kisspeptin can interact with other neuropeptides for the control of the reproductive axis. in the present study, we have investigated the effect of central admin...

We determined the central interactions of neuropeptide Y and leptin on cardiovascular and sympathetic responses in conscious rabbits. Intracerebroventricular injections of neuropeptide Y (0.1 and 1 nmol/40 microL) elicited dose-related decreases in arterial pressure and renal sympathetic nerve activity without a significant change in heart rate. Peak depressor or sympathoinhibitory responses of...

We report the first systematic study on short peptide structure affinity and activity for the neuropeptide Y (NPY) receptor. A series of linear pentapeptides has been synthesized that display affinities in the low micromolar range toward rat brain NPY receptors. Furthermore, some of these compounds competitively antagonize the Y1-type NPY receptor-mediated increase in cytosolic Ca2+ in human er...

introduction: over expression of selected peptide receptors in human tumors has been shown to represent clinically relevant targets for cancer diagnosis and therapy. the aim of this work was to investigate neuropeptide y (npy) as a new radiopharmaceutical for diagnosis of breast cancer. methods: a neuropeptide y analogues with y1 receptor preference and agonistic properties was synthesized by s...

The discovery of numerous endogenous neuropeptides that participate in the formation, transmission, modulation, and perception of pain signals offers numerous strategies for the development of new analgesics. Nevertheless, the same research has not yet replaced opioids as the gold standard of pain treatment. Therefore, one possible avenue of drug development may shift interest from searching fo...

The interactions between neuropeptide Y (NPY), specifically through NPY Y(1) and Y(2) receptor subtypes, and galanin [GAL(1-29)] have been analysed at the cardiovascular level. The cardiovascular effects of intracisternal coinjections of GAL(1-29) with NPY or NPY Y(1) or Y(2) agonists, as well as quantitative receptor autoradiography of the binding characteristics of NPY Y(1) and Y(2) receptor ...

High-afnnity analogues of neuropeptide Y containing conformationally restricted non-proteinogenic amino acids Annette G. Beck-Sickinger*t, Eike Hoffmann*, Klaus Padinit, Hans-Ulrich Reissigt, Klaus-Dieter WillimQ, Heike A. WielandQ and Gunther Jung* *Institute of Organic Chemistry, University of Tubingen, Auf der Morgenstelle 18, D-72076 Tubingen, Germany, $Institute of Organic Chemistry, Techn...

The Effects of Neuropeptide Y on the invitro mulhunit activity rhythm in the suprachiasmatic nucleus" (1997). University of Tennessee Honors Thesis Projects.

A number of studies have indicated that neuropeptide Y (NPY) is a central regulator of the gonadotropic axis, and the Y1 receptor was initially suggested to be implicated. As at least five different NPY receptor subtypes have now been characterized, the aim of the present study was to reinvestigate the pharmacological profile of the receptor(s) mediating the inhibitory action of NPY on LH secre...