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Understanding Cell Penetration of Cyclic Peptides

Open access
Dougherty, Patrick G., Sahni, Ashweta, Pei, Dehua·2019·Chemical Reviews

Abstract

Approximately 75% of all disease-relevant human proteins, including those involved in intracellular protein-protein interactions (PPIs), are undruggable with the current drug modalities (i.e., small molecules and biologics). Macrocyclic peptides provide a potential solution to these undruggable targets because their larger sizes (relative to conventional small molecules) endow them the capability of binding to flat PPI interfaces with antibody-like affinity and specificity. Powerful combinatorial library technologies have been developed to routinely identify cyclic peptides as potent, specific inhibitors against proteins including PPI targets. However, with the exception of a very small set of sequences, the vast majority of cyclic peptides are impermeable to the cell membrane, preventing their application against intracellular targets. This Review examines common structural features that render most cyclic peptides membrane impermeable, as well as the unique features that allow the minority of sequences to enter the cell interior by passive diffusion, endocytosis/endosomal escape, or other mechanisms. We also present the current state of knowledge about the molecular mechanisms of cell penetration, the various strategies for designing cell-permeable, biologically active cyclic peptides against intracellular targets, and the assay methods available to quantify their cell-permeability.

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Metadata

Authors
Dougherty, P. G., Sahni, A., & Pei, D.
Venue
Chemical Reviews
Published
2019-05-14
Volume
119
Issue
17
Pages
10241-10287
ISSN
  • 0009-2665 (ISSN-L)
  • 1520-6890
OpenAlex
W2945543430
Cited by
570
References
18
FWCI
3.95
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Understanding Cell Penetration of Cyclic Peptides. https://app.cochat.ai/papers/10.1021/acs.chemrev.9b00008
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Dougherty, P. G., Sahni, A., & Pei, D. (2019). Understanding Cell Penetration of Cyclic Peptides. Chemical Reviews. https://doi.org/10.1021/acs.chemrev.9b00008

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