Characterization of the trafficking pathway of cystic fibrosis transmembrane conductance regulator in baby hamster kidney cells

J Pharmacol Sci. 2004 Aug;95(4):471-5. doi: 10.1254/jphs.sc0040081. Epub 2004 Jul 31.

Abstract

To examine the unknown trafficking pathway of the cystic fibrosis transmembrane conductance regulator (CFTR) from the endoplasmic reticulum (ER), we utilized baby hamster kidney cells stably expressing CFTR fused with green fluorescent protein. CFTR trafficking from the ER was visualized and analyzed by immunocytochemical analyses. Here we show that CFTR was exported from the ER to the cis-Golgi and early endosome, suggesting that CFTR transport in the early secretory pathway may utilize a non-conventional pathway. This CFTR trafficking pathway may be a target for pharmacological modulation that selectively stimulates CFTR transport.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Cells, Cultured
  • Cricetinae
  • Cystic Fibrosis Transmembrane Conductance Regulator / genetics
  • Cystic Fibrosis Transmembrane Conductance Regulator / metabolism*
  • Endoplasmic Reticulum / metabolism
  • Endosomes / metabolism
  • Golgi Apparatus / metabolism
  • Green Fluorescent Proteins / genetics
  • Immunohistochemistry
  • Kidney / cytology
  • Microscopy, Confocal
  • Protein Transport
  • Recombinant Fusion Proteins / genetics
  • Recombinant Fusion Proteins / metabolism

Substances

  • Recombinant Fusion Proteins
  • Cystic Fibrosis Transmembrane Conductance Regulator
  • Green Fluorescent Proteins