SLC9A1 and hepatocellular carcinoma: Glucose restriction combined with a curcumin treatment led to the inhibition of Na(+)-H(+) exchanger-1 (NHE1), vATPase, monocarboxylate transporter (MCT)-1, the MCT4 level and proton-extruding enzymes in hepatoma cells, with an intracellular pH reduction.