Randomized Study of Photodynamic Therapy Using Dihematoporphyrin in Patients With Corneal Neovascularization

Summary

OBJECTIVES: I. Demonstrate the safety and efficacy of dihematoporphyrin derivative (DHP) in laser photodynamic therapy (PDT) in patients with corneal neovascularization. II. Document the histopathologic mechanism of action in selected patients undergoing penetrating keratoplasty following PDT therapy for corneal neovascularization. III. Facilitate FDA product approval of DHP as a photosensitizing agent for laser treatment in these patients. IV. Explore the use of this photosensitizer for ocular and cutaneous basal cell and squamous cell carcinoma.

Timeline

Start

1994-09

Primary completion

—

Completion

1998-09

Publications

• Background Sheppard JD, Chames MA, Clarke KC, et al.: Argon laser photodynamic thrombosis of human corneal neovascularization utilizing intravenous dihematoporphyrin. Investigative Ophthalmology and Visual Science 35(4): 1350, 1994.
• Background Chames MA, Sheppard JD, Mittal DC, et al.: A rabbit model for argon laser photodynamic therapy of corneal neovascularization utilizing topical dihematoporphyrin. Investigative Ophthalmology and Visual Science 36(1): 146, 1995.
• Background Mittal DC, Chames MS, Sheppard JD, et al.: Distribution of dihematoporphyrin in rabbit cornea, iris, aqueous humor and plasma after topical intravenous administration. Investigative Ophthalmology and Visual Science 36(13): 2564, 1995.
• Background Lattanzio F, Rusch A, Sheppard J, et al.: Documentation of corneal neovascularization by quantitative video fluorescein angiography. Investigative Ophthalmology and Visual Science 37: S546, 1996.
• Background Cox KW, Sheppard JD, Lattanzio FA, et al.: Photodynamic therapy of corneal neovascularization using topical dihematoporphyrin ester. Investigative Ophthalmology and Visual Science 38: S512, 1997.
• Background Williams PB, Sheppard JD, Chames MA, et al.: Distribution of dihematoporphyrin in rabbit cornea, iris, aqueous humor and serum after topical vs intravenous administration. Journal of Clinical Pharmacology 35(10): 936, 1995.

Drugs

Indications