Long-term single-molecule imaging reveals ErbB receptor dimerization dynamics and oncogenic dysregulation
This study presents a novel long-term, multicolor single-particle tracking (SPT) technique using upconverting nanoparticles (UCNPs) to observe ErbB family receptors (EGFR, HER2, HER3) in living cells without photobleaching. The research reveals real-time dimerization dynamics, showing that oncogenic EGFR mutations promote stable, ligand-independent dimerization, and unexpectedly, both HER2 and HER3 exhibit constitutive homodimerization. The findings offer new insights into oncogenic signaling mechanisms and the ErbB receptor interaction network.
Key quotes
Dimerization is crucial for the activation of ErbB family receptors, yet the real-time dynamics and effects of oncogenic mutations remain unclear.
Our technique enables continuous observation of receptor interactions, revealing details of their dimerization dynamics.
Oncogenic EGFR mutations promote stable, ligand-independent dimerization.
Unexpectedly, both HER2 and HER3 exhibit constitutive homodimerization.
This offers new insights into the mechanisms of oncogenic signaling and the ErbB receptor interaction network.
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