Fundamental lessons from blunted chemosensory response of carotid body to hypoxia.

Authors

  • Sukhamay Lahiri University of Pennsylvania School of Medicine, Department of Physiology. Philadelphia, United States.
  • Anil Mokashi University of Pennsylvania School of Medicine, Department of Physiology. Philadelphia, United States.
  • Arijit Roy University of Pennsylvania School of Medicine, Department of Physiology. Philadelphia, United States.
  • Charmaine Rozanov University of Pennsylvania School of Medicine, Department of Physiology. Philadelphia, United States.

Keywords:

neurosecretion, neural response, membrane channels, membrane depolarization

Abstract

Glomus cells are synaptically connected with single afferent fiber, and depolarization of the cell should result in increases of [Ca22+]i, neurosecretion and neural discharge. Suppression of K+ current by low PO₂ is supposed to depolarize the glomus cells. Therefore, a blunted chemosensory response can provide a clue to O2 sensing by the cells being insensitive to O₂ But literature showed that K+- O₂ depression by low PO₂ was normal, although the cells did not depolarize. Also, the sensory fiber with blunted hypoxic response showed a normal or supernormal CO₂/H+ response. Accordingly, they should manifest normal or supernormal K+ current depression with raised CO₂/H+ stimuli.

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Published

2025-08-11

How to Cite

Lahiri, S., Mokashi, A., Roy, A., & Rozanov, C. (2025). Fundamental lessons from blunted chemosensory response of carotid body to hypoxia. Acta Andina, 6(2), 61–65. Retrieved from https://revistas.upch.edu.pe/index.php/AA/article/view/6143

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ARTICULOS