Treon Steven P, Tournilhac Olivier, Branagan Andrew R, Hunter Zachary, Xu Lian, Hatjiharissi Evdoxia, Santos Daniel D
Bing Program for Waldenstrom's Macroglobulinemia, Dana-Farber Cancer Institute, nLG102, 44 Binney Street, Boston, MA 02115, USA.
Clin Lymphoma. 2004 Dec;5(3):205-7. doi: 10.3816/clm.2004.n.029.
Waldenstrom's macroglobulinemia (WM) is an incurable B-cell malignancy. Interestingly, an unusual response activity was observed in 5 patients with WM that appeared related to their use of sildenafil, a phosphodiesterase inhibitor used to treat erectile dysfunction. One patient demonstrated a complete remission, and 4 other patients demonstrated less dramatic, but also unexpected, responses associated with sildenafil. In view of these findings, WM tumor cells were culture-sorted with sildenafil at pharmacologically achievable levels and apoptosis was demonstrated in tumor cells from all 5 patients. These studies suggest that sildenafil may be an active agent in the treatment of WM.
