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Updated: Dec 13, 2025

Construction of Cyclic Cell-Penetrating Peptides for Enhanced Penetration of Biological Barriers
Published on: September 19, 2022
Cell-penetrating and mitochondrion-targeting molecules
George Appiah Kubi1, Dehua Pei1
1Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH, United States.
Researchers developed novel cell-penetrating molecules (CPMs) for targeted delivery into mitochondria. These CPMs successfully deliver therapeutic cargos into the mitochondrial matrix, overcoming previous delivery challenges.
Area of Science:
- Mitochondrial biology
- Cellular therapeutics
- Drug delivery systems
Background:
- Mitochondria are vital for cellular functions like ATP production and apoptosis.
- Mitochondrial dysfunction is linked to numerous human diseases.
- Targeted delivery of therapeutics into mitochondria remains a significant challenge.
Purpose of the Study:
- To detail the synthesis of novel mitochondrion-targeting, cell-penetrating molecules (CPMs).
- To demonstrate the application of CPMs for delivering cargos into the mitochondrial matrix.
- To overcome the limitations of selective mitochondrial drug delivery.
Main Methods:
- Synthesis of a new family of mitochondrion-targeting, cell-penetrating molecules (CPMs).
- Conjugation of small-molecule and peptidyl cargos to CPMs.
- Live-cell confocal microscopic imaging of HeLa cells treated with CPM-cargo conjugates.
Main Results:
- CPMs were synthesized and characterized.
- CPMs efficiently and specifically delivered membrane-impermeable peptidyl cargos into the mitochondrial matrix.
- Successful delivery was observed for cargos with no more than two negative charges.
Conclusions:
- Novel CPMs enable efficient and specific delivery of cargos into the mitochondrial matrix.
- This technology offers a promising strategy for treating mitochondrial-related diseases.
- The CPM system overcomes previous challenges in targeted mitochondrial therapeutics delivery.
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