Light microscopy based approach for mapping connectivity with molecular specificity.

Abstract:

:Mapping neuroanatomy is a foundational goal towards understanding brain function. Electron microscopy (EM) has been the gold standard for connectivity analysis because nanoscale resolution is necessary to unambiguously resolve synapses. However, molecular information that specifies cell types is often lost in EM reconstructions. To address this, we devise a light microscopy approach for connectivity analysis of defined cell types called spectral connectomics. We combine multicolor labeling (Brainbow) of neurons with multi-round immunostaining Expansion Microscopy (miriEx) to simultaneously interrogate morphology, molecular markers, and connectivity in the same brain section. We apply this strategy to directly link inhibitory neuron cell types with their morphologies. Furthermore, we show that correlative Brainbow and endogenous synaptic machinery immunostaining can define putative synaptic connections between neurons, as well as map putative inhibitory and excitatory inputs. We envision that spectral connectomics can be applied routinely in neurobiology labs to gain insights into normal and pathophysiological neuroanatomy.

journal_name

Nat Commun

journal_title

Nature communications

authors

Shen FY,Harrington MM,Walker LA,Cheng HPJ,Boyden ES,Cai D

doi

10.1038/s41467-020-18422-8

subject

Has Abstract

pub_date

2020-09-15 00:00:00

pages

4632

issue

1

issn

2041-1723

pii

10.1038/s41467-020-18422-8

journal_volume

11

pub_type

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