Molecular ZIP codes in targeted drug delivery

Author:

Ruoslahti Erkki12

Affiliation:

1. Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037

2. Cend Therapeutics, San Diego, CA 92130

Abstract

The term “molecular ZIP (or area) codes” refers to an originally hypothetical system of cell adhesion molecules that would control cell trafficking in the body. Subsequent discovery of the integrins, cadherins, and other cell adhesion molecules confirmed this hypothesis. The recognition system encompassing integrins and their ligands came particularly close to fulfilling the original ZIP code hypothesis, as multiple integrins with closely related specificities mediate cell adhesion by binding to an RGD or related sequence in various extracellular matrix proteins. Diseased tissues have their own molecular addresses that, although not necessarily involved in cell trafficking, can be made use of in targeted drug delivery. This article discusses the molecular basis of ZIP codes and the extensive effort under way to harness them for drug delivery purposes.

Publisher

Proceedings of the National Academy of Sciences

Subject

Multidisciplinary

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