pubmed:abstractText |
The role of cAMP in regulation of intracellular pH in the confluent LLC-PK1 cells was investigated. DibutyrylcAMP and forskolin induce intracellular acidification. This acidification is inhibited by DIDS and ethacrynic acid, inhibitors of Na(+)-independent Cl-/HCO3- exchange, and by removal of extracellular Cl-. In addition, Bt2 cAMP causes Cl- entry into LLC-PK1 cells. These results suggest that cAMP activates Cl- transport, namely Na(+)-independent Cl-/HCO3- exchange, which participates in pHi regulation.
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