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Injectable Pro-drugs Approach for Retina and Posterior Segment Disease

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Drug Delivery for the Retina and Posterior Segment Disease

Abstract

Drug delivery to the posterior segment of the eye is an area of intense research and massive prospective. Because of the anatomical and protecting structure of the eye, drug delivery to the interior parts of the eye still remains bothersome. Regardless of the emergence of effectual drugs to treat various retinal diseases, doctors still wrestle with how best to administer these sight-saving drugs. An ideal route of administration would deliver therapeutic levels of drug to targeted parts in a remarkably protected way at the same time as providing negligible interruption to the patient’s quality of life. Promising innovative ocular drug delivery such as an injectable pro-drug strategy has been, and is being, employed for this purpose. This novel pro-drug approach offers manifold benefits over the parent compound as they enhance the membrane permeability, site specificity, transporter targeting ability, and aqueous solubility. In this chapter, we have discussed a range of pro-drug strategies, for instance, functional group approach, polymer and lipid conjugation with the drug moiety to impart lipophilicity or hydrophilicity or else to target nutrient transporters by conjugation with transporter-specific moieties, which have been extensively functional for improving drug penetration into the ocular tissues, in addition to overall ocular bioavailability, with minimal disruption of the ocular diffusion barriers. We have also discussed an update on the use of injectable pro-drug concept in ocular drug delivery and highlighted continuing academic and industrial research and progress in terms of ocular pro-drug design as well as delivery.

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Patel, A., Patel, J.K., Pathak, Y.V. (2018). Injectable Pro-drugs Approach for Retina and Posterior Segment Disease. In: Patel, J., Sutariya, V., Kanwar, J., Pathak, Y. (eds) Drug Delivery for the Retina and Posterior Segment Disease. Springer, Cham. https://doi.org/10.1007/978-3-319-95807-1_19

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