The invention provides compounds, pharmaceutical compositions and methodscomprising modifiedLCAT for treating atherosclerosis, inflammation, thrombosis and otherconditions and for decreasing orprevention of accumulation of cholesterol in a subject. The modified LCAThaving a replacement of theamino acid residue 31 by a cysteine residue. The cysteine residue beingmodified by replacing the thiolhydrogen with 3-pyrazinyl-2-carbonitrile.