This record provides bibliographic details and links to the original research. An editorial study breakdown is not available.
What the researchers found
Rigid proline-based peptides with cationic and hydrophobic groups arranged along a helical backbone achieved enhanced cell entry and selective accumulation in mitochondria. The peptides showed time-dependent redistribution from other compartments to mitochondria.
Why it matters
Many diseases involve mitochondrial dysfunction. Designing peptides that reliably and selectively reach mitochondria could enable targeted delivery of drugs to this key organelle.
The numbers in context
Polyproline II (PPII) helical backbone. Cationic guanidinium groups and hydrophobic cyclohexyl groups aligned along helix edges. Time-dependent redistribution leading to prolonged mitochondrial residency.
How the study worked
Synthesized amphipathic oligoprolines with systematic variations in hydrophobicity. Compared rigid PPII helix peptides to flexible analogs. Assessed cellular uptake and mitochondrial selectivity using fluorescence microscopy and tracking.
Who was studied
Cell cultures for peptide uptake and localization studies
What this study cannot tell us
In vitro cell culture study only. No therapeutic cargo tested. Mitochondrial targeting efficiency in vivo is unknown. Cytotoxicity at higher concentrations not fully characterized.
Read the original research
Amphipathic Proline-Rich Cell Penetrating Peptides for Targeting Mitochondria.
ACS chemical biology, 20(9), 2298-2307
Citation
Schmitt, Adeline; Wennemers, Helma. (2025). Amphipathic Proline-Rich Cell Penetrating Peptides for Targeting Mitochondria.. ACS chemical biology, 20(9), 2298-2307. https://doi.org/10.1021/acschembio.5c00479