text: TGF-beta1 and high D-glucose increased hCAT-1 mRNA expression ( approximately 8-fold) and maximal transport velocity (V(max)), L-[(3)H]citrulline formation from L-[(3)H]arginine (index of << NO >> synthesis) and [[ endothelial NO synthase ]] (eNOS) protein abundance, but did not alter eNOS phosphorylation.