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(Circulation. 2000;102:2322.)
© 2000 American Heart Association, Inc.

Brief Rapid Communications

Photoangioplasty for Human Peripheral Atherosclerosis

Results of a Phase I Trial of Photodynamic Therapy With Motexafin Lutetium (Antrin)

Presented in part at the 72nd Scientific Sessions of the American Heart Association, Atlanta, Ga, November 7–10, 1999.

Stanley G. Rockson, MD; Paul Kramer, MD; Mahmood Razavi, MD; Andrzej Szuba, MD, PhD; Steven Filardo, MD; Peter Fitzgerald, MD, PhD; John P. Cooke, MD, PhD; Shuja Yousuf, MD; Arthur R. DeVault, PhD; Markus F. Renschler, MD; Daniel C. Adelman, MD

From the Division of Cardiovascular Medicine (S.G.R., A.S., S.F., P.F., J.P.C., S.Y.), Division of Interventional Radiology (M.R.), Stanford University School of Medicine, Stanford, Calif; Mid-America Heart Institute (P.K.), Kansas City, Mo; and Pharmacyclics, Inc (A.R.D., M.F.R., D.C.A.), Sunnyvale, Calif.

Correspondence to Stanley G. Rockson, MD, Falk CV Research Center, Stanford, CA 94305. E-mail rockson{at}leland.stanford.edu

Background—In photoangioplasty, light activation of a photosensitive drug offers the potential for treatment of long segments of vascular disease. This is a brief description of a study designed to evaluate the safety and tolerability of a new photosensitizer, Antrin (motexafin lutetium), in the endovascular treatment of atherosclerosis.

Methods and Results—An open-label, single-dose, escalating drug- and light-dose study was performed in patients with atherosclerotic peripheral arterial insufficiency. Clinical evaluation, serial quantitative angiography, and intravascular ultrasonography were performed. Therapy was well tolerated, and only minor side effects were observed. Treatment produced no deleterious vascular effects. Although this study was not designed to examine clinical efficacy, several secondary end points suggested a favorable therapeutic effect.

Conclusions—This phase I study demonstrates that photoangioplasty with motexafin lutetium is well tolerated and safe. Preliminary efficacy data suggest a future role for the treatment of flow-limiting atherosclerosis.

Key Words: atherosclerosis • peripheral vascular disease • catheters

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