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

Area of Science:

• Neuroscience
• Cell Biology
• Microscopy

Background:

• Super-resolution microscopy advances cell biology but struggles with dense tissues and non-genetically modified species like humans.
• Delineating individual cells and their structures in complex tissues, especially the human nervous system, remains challenging.
• Existing methods often lack the resolution or specificity for detailed subcellular analysis.

Purpose of the Study:

• To develop a method for complete morphological labeling of individual neurons across species for nanoscale protein analysis.
• To correlate cellular physiological properties with subcellular protein expression.
• To enable detailed molecular investigation of the human brain in health and disease.

Main Methods:

• Patch2MAP combines patch-clamp electrophysiology with epitope-preserving magnified analysis of proteome (eMAP).
• This technique allows for full morphological labeling of individual neurons.
• It facilitates cell-resolved protein analysis at the nanoscale.

Main Results:

• Patch2MAP successfully labeled individual spiny synapses in human cortical pyramidal neurons.
• Electrophysiological AMPA-to-NMDA receptor ratios were shown to correlate with protein expression levels.
• The method was applied to analyze neuron-to-glioma synapses in human glioblastoma tissue.

Conclusions:

• Patch2MAP provides a powerful tool for combined subcellular functional, anatomical, and protein analyses of any cell type.
• This method opens new avenues for direct molecular investigation of the human brain.
• It is particularly valuable for studying complex neurological conditions and cell types not amenable to genetic modification.