Localization of enkephalin‐like immunoreactivity in the cat carotid and aortic body chemoreceptors

John T. Hansen, James Brokaw, Douglas Christie, Michal Karasek

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


The purpose of this study was to determine if enkephalin‐like immunoreactivity was present in the glomus cells of the carotid and aortic body peripheral arterial chemoreceptors. Cat carotid and aortic bodies were reacted with antisera to met‐ and leu‐enkephalin using the indirect peroxidase‐antiperoxidase immunocytochemical method of Sternberger (1979). Both the carotid and aortic bodies demonstrated clusters of immunoreactive cells for both met‐ and leuenkephalin. Additionally, met‐enkephalin‐like immunoreactivity was observed in many of the dense‐core vesicles of the glomus cells of the carotid body. The glomus cells of these chemoreceptors are known to contain catecholamines which may modulate chemoreceptor activity. The presence of opioid peptide‐like substances co‐existing with the glomus cell catecholamines, perhaps in the same vesicles, may have important implications for a trophic influence of these peptides on glomus cell chemoreceptor modulation.

Original languageEnglish (US)
Pages (from-to)405-410
Number of pages6
JournalThe Anatomical Record
Issue number3
StatePublished - Jul 1982

ASJC Scopus subject areas

  • Anatomy
  • Agricultural and Biological Sciences (miscellaneous)

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