- Potent inhibition of human immunodeficiency virus and herpes simplex virus type 1 by 9-(2-phosphonylmethoxyethyl)adenine in primary macrophages is determined by drug metabolism, nucleotide pools, and cytokines. Perno, C.F., Balestra, E., Aquaro, S., Panti, S., Cenci, A., Lazzarino, G., Tavazzi, B., Di Pierro, D., Balzarini, J., Calio, R. Mol. Pharmacol. (1996)