ESBATech's Lead Antibody Fragment Enters Clinical Development for Ophthalmic I... ( ESBA105 Penetrates all Segments...)

ESBATech's Lead Antibody Fragment Enters Clinical Development for Ophthalmic Indications

Date:4/24/2008

ESBA105 Penetrates all Segments of the Eye via Topical Eye Drops

ZURICH, Switzerland, April 24 /PRNewswire/ -- ESBATech AG, a leading developer of antibody fragment therapeutics, today announced the initiation of Phase I clinical development of the company's lead product development candidate, ESBA105, in ophthalmology. This Phase I study is designed to evaluate the safety, tolerability and pharmacokinetic profile of ESBA105, when delivered topically via eye drops in healthy volunteers. The study is being conducted as a single and repeated dose escalation study in Switzerland. ESBA105 is a single-chain antibody fragment directed against TNFa. It is being developed initially for ophthalmic indications.

In previously reported in vivo, preclinical studies, ESBA105 achieved high therapeutic concentrations in all ocular tissues, when delivered topically via eye drops. Therapeutic concentrations of ESBA105 were observed throughout the anterior (front) and the posterior (back) segments of the eye, the latter including the vitreous humor, retina and choroid.

Peter Lichtlen, M.D., Ph.D., Head of Clinical Development at ESBATech AG, commented, "ESBA105 shows an entirely novel and unique intraocular distribution pattern upon topical administration to the eye. Therapeutic levels are reached in both the aqueous and vitreous humor after only a couple of hours following initiation of treatment. Our in vivo, preclinical studies have shown that ESBA105 has a prolonged half-life of 25 hours in the vitreous. Thus, the vitreous acts as a natural depot compartment for ESBA105, allowing for highly attractive maintenance dosing regimens. TNFa is a rapidly emerging target in ophthalmology and ESBA105 has the potential to be a significant advancement in anti-inflammatory ophthalmic medicine."

Dominik Escher, Ph.D., Chief Executive Officer of ESBATech AG, added, "This is a major corporate milestone for ESBATech. After having developed a repeatable technol
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