Comprehensive review of monocyclic peptide types, synthesis methods, and applications covering their use as bioactive molecules, targeted therapeutics, diagnostics, and vaccine design.
Fastest-growing drug classMonocyclic peptides bridge small molecules and biologics with superior stability and selectivity — multiple members are now FDA-approved drugs
What the researchers found
Comprehensive review covering monocyclic peptide classification, synthesis methods (chemical and enzymatic), and applications in bioactive molecule design, targeted therapeutics, diagnostics, and vaccine development.
Why it matters
Cyclic peptides are one of the fastest-growing drug classes, bridging the gap between small molecules and biologics. Understanding their types and synthesis enables rational design for diverse therapeutic applications.
The numbers in context
Covers antimicrobial, anticancer, delivery, diagnostic, and agricultural cyclic peptide applications
How the study worked
Narrative review of monocyclic peptide chemistry, synthesis, and biomedical applications.
Who was studied
N/A (literature review)
What this study cannot tell us
Broad review covering many topics without deep analysis of any single application. Some synthesis methods are technically challenging at scale. Clinical evidence varies widely between applications.
How to read the evidence
Not applicable (comprehensive chemistry review).
When this study was published
Published 2021. Cyclic peptide drug development continues accelerating.
The bigger picture
Monocyclic peptides represent a sweet spot in drug design: large enough for high-specificity protein interactions but small enough for potential oral delivery and tissue penetration. Several are already FDA-approved drugs.
Questions still open
- Which monocyclic peptide synthesis method is best suited for clinical manufacturing?
- Can oral delivery of monocyclic peptides be achieved reliably?
- What new therapeutic targets are most suited to monocyclic peptide approaches?
Common questions
What makes cyclic peptides better than linear ones?
Are any cyclic peptide drugs already available?
Read the original research
Monocyclic Peptides: Types, Synthesis and Applications.
Current pharmaceutical biotechnology, 22(1), 123-135
Citation
Khazaei-Poul, Yalda; Farhadi, Shohreh; Ghani, Sepideh; Ahmadizad, Safar Ali; Ranjbari, Javad. (2021). Monocyclic Peptides: Types, Synthesis and Applications.. Current pharmaceutical biotechnology, 22(1), 123-135. https://doi.org/10.2174/1573412916666200120155104