LAPTM4B and hepatocellular carcinoma: In addition, a 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay revealed that the slow growth rate of HCC cells with stable knockdown of LAPTM4B was reversed after transfection with a plasmid expressing the LAPTM4B protein (73).