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Differential Transcription of Ion Transporters, NHE1, ATP1B1, NKCC1 in Human Peripheral Blood Lymphocytes Activated to Proliferation
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2001
Year
Rt PcrHuman CellSignal TransductionMolecular PhysiologyBiochemistryCell SignalingDifferential TranscriptionApoptosisImmunologyK-atpase PumpCell DeathBlood CellReceptor Tyrosine KinaseIon TransportersMedicineCell BiologyCellular PhysiologyProtein Phosphorylation
This work, using RT PCR, studied expression of mRNAs encoding ion transporters, the Na/H antiporter (NHE1), the beta subunit of the Na,K-ATPase pump (ATP1B1), the NaK2Cl symporter (NKCC1), and some proteins unrelated to ion transport: the serum and glucocorticoid dependent kinase (hSGK), beta-actin, a glycolytic enzyme (GAPDH), and regulators of proliferation and apoptosis (p53, Bcl-2) during activation of human lymphocytes with phytohemagglutinin for 4-24 h. Within 24 hours the mRNA levels of NHE1, beta-actin, Bcl-2, and p53 increased by more than 100%, the mRNA levels of ATP1B1, GAPDH, and hSGK, by about 50%, while the mRNA levels of NKCC1 decreased transiently. These results indicate a differential transcriptional control of NHE1, ATP1B1, and NKCC1 following a proliferative stimulus of human lymphocytes.