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Am J Rhinol Allergy. 2010 Jan-Feb;24(1):6-10. doi: 10.2500/ajra.2010.24.3379.

Zinc increases ciliary beat frequency in a calcium-dependent manner.

Author information

  • 1Otolaryngology, Department of Surgery, University of Alabama-Birmingham, Birmingham, Alabama, USA. bwoodwo@hotmail.com

Abstract

BACKGROUND:

Dynamic regulation of respiratory ciliary beat frequency (CBF) is regulated by fluxes in intracellular calcium (Ca(2+)). P2X receptors (P2XR) are extracellular ATP-gated, Ca(2+)-permeable, nonselective cation channels. Zinc increases intracellular Ca(2+) in a sodium (Na(+))-free environment through activation of P2XR channels. We hypothesize that topical zinc increases CBF in a Ca(2+)-dependent fashion as a result of this mechanism.

METHODS:

The apical surface of mouse sinonasal air-liquid interface cultures were bathed in zinc in a Na(+)-free solution with or without Ca(2+). High-speed digital video imaging captured and analyzed CBF at a sampling rate of 100 frames/s.

RESULTS:

CBF significantly increased fourfold over baseline from 5.99 +/- 3.16 Hz to 22.4 +/- 4.33 Hz in the presence of zinc chloride (50 micromoles) and calcium chloride (3 mM). This effect is abolished in the presence of extracellular Na(+) and was pH dependent.

CONCLUSION:

Zinc stimulates CBF in the presence of Ca(2+) likely through activation of P2X receptors. Thus, zinc represents a promising agent for stimulation of mucociliary clearance.

PMID:
20109308
[PubMed - indexed for MEDLINE]
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