Neuropeptide y in the sympathetic control of blood pressure in hypertensive subjects

J. Chalmers, M. Morris, V. Kapoor, M. Cain, J. Elliott, A. Russell, P. Pilowsky, J. Minson, M. West, L. Wing

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Neuropeptide Y (NPY) coexists with noradrenaline in postganglionic sympathetic neurons and with noradrenaline and adrenaline in the central nervous system. The possibility that NPY is released into the circulation during activation of the sympathoadrenal system was investigated in ten moderately hypertensive volunteers using three different stimuli. In healthy moderately hypertensive volunteers cold pressor test, head up tilt and graded bicycle exercise resulted in increased blood pressure, heart rate and plasma catecholamine concentrations. While there was a trend for plasma NPY-like immunoreactivity (NPY-LI) to increase during cold pressor test and head up tilt, NPY-LI concentration only increased significantly during bicycle exercise, the stimulus of greatest duration. These results suggest that plasma NPY-LI can be released into the circulation on sympathoadrenal activation in moderately hypertensive subjects and demonstrate that the pattern of release is similar to that previously observed in normotensive subjects.

Original languageEnglish
Pages (from-to)59-66
Number of pages8
JournalClinical and Experimental Hypertension
Volume11
Issue numberS1
DOIs
Publication statusPublished - 1 Jan 1989
Externally publishedYes

Keywords

  • Cold pressor test
  • Exercise
  • Head up tilt
  • Hypertension
  • Man
  • Sympathetic activation

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