Middle temporal gyrus (MTG) was identified on and removed from frozen slabs of interest, and subdivided into smaller blocks for further sectioning. Individual tissue blocks were processed by thawing in PBS supplemented with 10mM DL-Dithiothreitol (DTT, Sigma Aldrich), mounting on a vibratome (Leica), and sectioning at 500μm in the coronal plane. Sections were placed in fluorescent Nissl staining solution (Neurotrace 500/525, ThermoFisher Scientific) prepared in PBS with 10mM DTT and 0.5% RNasin Plus RNase inhibitor (Promega) and stained for 5 min on ice. After staining, sections were visualized on a fluorescence dissecting microscope (Leica) and cortical layers were individually microdissected using a needle blade micro-knife (Fine Science Tools).
Neurotrace 500 525
The Neurotrace 500/525 is a specialized fluorescent stain designed for labeling neurons in fixed tissue samples. It binds to Nissl substances within the cell bodies and processes of neurons, allowing for the visualization and identification of neuronal structures. The Neurotrace 500/525 is a core tool used in neuroscience research and histological analysis.
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14 protocols using neurotrace 500 525
Postmortem Brain Tissue Sectioning
Transcardial Perfusion and Nuclei Isolation for Marmoset M1 Cortex
As for human samples, marmoset M1 was isolated from thawed slabs using fluorescent Nissl staining (Neurotrace 500/525, ThermoFisher Scientific). Stained sections were screened for histological hallmarks of primary motor cortex. Nuclei were isolated from the dissected regions as described (
Postmortem Brain Tissue Preparation for RNA-Seq
Macaque Motor Cortex Transcriptional Profiling
Postmortem Motor Cortex Tissue Isolation
Postmortem Brain Tissue Preparation for RNA-Seq
Postmortem Brain Tissue Sectioning
Middle temporal gyrus (MTG) was identified on and removed from frozen slabs of interest, and subdivided into smaller blocks for further sectioning. Individual tissue blocks were processed by thawing in PBS supplemented with 10mM DL-Dithiothreitol (DTT, Sigma Aldrich), mounting on a vibratome (Leica), and sectioning at 500μm in the coronal plane. Sections were placed in fluorescent Nissl staining solution (Neurotrace 500/525, ThermoFisher Scientific) prepared in PBS with 10mM DTT and 0.5% RNasin Plus RNase inhibitor (Promega) and stained for 5 min on ice. After staining, sections were visualized on a fluorescence dissecting microscope (Leica) and cortical layers were individually microdissected using a needle blade micro-knife (Fine Science Tools).
Histological Verification of Fiber-Optic Implants
Marmoset Brain Nuclei Isolation and Sequencing
As with human samples, M1 was isolated from thawed slabs using fluorescent Nissl staining (Neurotrace 500/525, ThermoFisher Scientific). Stained sections were screened for histological hallmarks of primary motor cortex. Nuclei were isolated from the dissected regions following this protocol: https://www.protocols.io/view/extraction-of-nuclei-from-brain-tissue-2srged6 and processed using the 10x Chromium Single-Cell 3' Reagent Kit v3. 10x chip loading and sample processing was done according to the manufacturer's protocol.
Postmortem motor cortex isolation
Postmortem brain specimens were processed as previously described 2 . Briefly, coronal brain slabs were cut at 1cm intervals and frozen for storage at -80°C until the time of further use. Putative hand and trunk-lower limb regions of the primary motor cortex were identified, removed from slabs of interest, and subdivided into smaller blocks. One block from each donor was processed for cryosectioning and fluorescent Nissl staining (Neurotrace 500/525, ThermoFisher Scientific). Stained sections were screened for histological hallmarks of primary motor cortex. After verifying that regions of interest contained M1, blocks were processed for nucleus isolation as described below.
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