Patch2MAP combines patch-clamp electrophysiology with super-resolution structural and protein imaging in identified...

Area of Science:

• Neuroscience
• Cell Biology
• Proteomics

Background:

• Super-resolution microscopy advances cell biology but requires exogenous protein expression for contrast in dense tissues.
• Investigating human neurons is challenging due to limited genetic modification and complex anatomy.

Purpose of the Study:

• To present a novel method for full morphological labeling of individual neurons from any species or cell type without genetic modification.
• To enable cell-resolved protein analysis and correlate physiological properties with subcellular protein expression.

Main Methods:

• The study combined patch-clamp electrophysiology with epitope-preserving magnified analysis of proteome (eMAP), termed Patch2MAP.
• Patch2MAP was applied to individual spiny synapses in human cortical pyramidal neurons.

Main Results:

• The method achieved full morphological labeling of individual neurons without genetic modification.
• Electrophysiological AMPA-to-NMDA receptor ratios in human neurons corresponded tightly to respective protein expression levels.

Conclusions:

• Patch2MAP allows combined subcellular functional, anatomical, and proteomic analyses of any cell.
• This technique opens new avenues for direct molecular investigation of the human brain in health and disease.