A designed peptide targeting the interdomain linker of MRP1 transporter reversed multidrug resistance in cancer cells by inhibiting drug efflux through a novel binding mechanism.
New target siteThe flexible interdomain linker of MRP1 provides a novel peptide binding site for reversing multidrug resistance
What the researchers found
A peptide targeting MRP1's flexible interdomain linker inhibited drug efflux and reversed multidrug resistance by a novel mechanism distinct from substrate-based approaches.
Why it matters
Multidrug resistance causes most cancer treatment failures. Targeting transporter flexibility with peptides offers a fundamentally new approach.
How the study worked
Computational analysis of MRP1 interdomain linker dynamics, peptide design, molecular docking and dynamics simulations, and drug efflux functional assays.
What this study cannot tell us
In vitro evidence. Peptide stability and delivery in vivo not addressed. MRP1 is expressed in normal tissues, so selectivity needs optimization.
How to read the evidence
Computational and in vitro study establishing a novel mechanism. Early-stage requiring in vivo validation.
When this study was published
Published in 2025.
The bigger picture
Exploiting protein flexibility with peptides could be a general strategy for targeting "undruggable" proteins beyond cancer resistance.
Questions still open
- Could this peptide be combined with chemotherapy in animal models?
- Does the linker-binding mechanism apply to other ABC transporters?
- Can the peptide be stabilized for systemic delivery?
Common questions
How does cancer resist chemotherapy?
Is this approach available for patients?
Read the original research
Reining in Multidrug Resistance Protein 1 via Binding Its Flexible Interdomain Linker with Sequence-Selective Peptide-Binding Nanoparticles.
Biomacromolecules
Citation
Ghosh, Avijit; Sharma, Mansi; Zhao, Yan. (2026). Reining in Multidrug Resistance Protein 1 via Binding Its Flexible Interdomain Linker with Sequence-Selective Peptide-Binding Nanoparticles.. Biomacromolecules. https://doi.org/10.1021/acs.biomac.5c02567