12 major claims checked against the paper's own evidence: all adequately supported.
partialResults, paragraph 17Reviewer 2
The SE chromatin conformation is associated with increased chromatin looping and transcriptional activity during OPC-to-ODC transition.
The paper shows correlation between SE and increased chromatin contacts in tOPC/tODC, and cites mouse ChAIR data for transcriptional activity, but direct evidence in human is limited.
Evidence: Increased chromatin loops at TNR locus in tOPC, and mouse ChAIR data showing elevated transcriptional activity in transitional cells.
“Consistent with our findings in the human brain, we observed that cells at the transitional stages... are strongly enriched for short-range chromatin contacts... these transitional cells exhibit elevated transcriptional activity.”
supportedAbstract and ResultsReviewer 1
A single-cell and spatial 3D multi-omic atlas of developing human basal ganglia and inhibitory neurons has been generated.
The paper presents snm3C-seq, spatial transcriptomics, and imaging-based chromatin tracing from 9 donors across developmental stages, providing a comprehensive dataset.
Evidence: Results section describes 155,225 new snm3C-seq profiles, spatial transcriptomics with a 6,175-transcript panel, and chromatin+RNA MERFISH. Data are deposited in public repositories.
“We generated 155,225 new snm3C-seq profiles sampled from nine developing brains”
supportedResults, paragraphs 2-3Reviewer 1
LGE shows declining neurogenic activity in mid-gestation and CGE exhibits ongoing developmental progression through infancy.
The paper provides pseudotime analysis, spatial transcriptomics showing higher immature neuron markers in CGE, and quantification of immature CGE neurons in post-natal samples.
Evidence: Results: 'CGE-derived immature neurons are the only type of immature neurons detected in post-natal brains at 1 month (14.2% of all CGE-derived cells)'. Spatial data show CGE highest in DCX, SOX11, MARCKSL1. Pseudotime differences are statistically significant.
“CGE-derived immature neurons are the only type of immature neurons detected in post-natal brains at 1 month (14.2% of all CGE-derived cells) or at 4–7 months (2.4%)”
supportedResults, 'Developmental trajectory of LGE-derived MSNs'Reviewer 1
MSNs exhibit synchronized maturation with discrete age groups, distinct from other neuron types.
The paper shows UMAP embedding with discrete MSN clusters by age, smaller within-age cell-to-cell distances, and both mCG and 3C pseudotime showing a major transition between 2T and 3T, unlike interneurons.
Evidence: Results: 'MSNs consistently exhibit smaller within-age-group distances among individual MSN cells and greater between-age-group distances'; 'UMAP embedding... revealed a more discrete distribution of MSNs across age groups compared to CGE- and MGE-derived inhibitory interneurons'.
“MSNs consistently exhibit smaller within-age-group distances among individual MSN cells and greater between-age-group distances”
supportedResults, 'Transient short-range chromatin conformation is associated with OPC to ODC differentiation'Reviewer 1
A transient short-range enriched (SE) chromatin conformation is found during the OPC-to-ODC transition in infant brains.
The paper identifies transitional OPC (tOPC) and tODC populations in 1-month brain samples, shows they are enriched for SE contacts, and validates with independent mouse ChAIR data.
Evidence: Results: 'tOPCs were enriched at 1 month in both cortex and striatum... SE chromatin organization was enriched in transitional tOPC and tODC populations'.
“tOPCs were enriched at 1 month in both cortex and striatum, whereas enrichment of tODCs at this stage was observed primarily in the striatum”
supportedResults, 'Neuropsychiatric risk across single cells in developing brains'Reviewer 1
Gene regulatory regions active in MSNs are enriched for loci associated with genetic risk for neuropsychiatric disease.
The paper uses met-scDRS and LDSC to show enrichment of SCZ, BIP, ADHD, and MDD risk in MSNs, particularly DRD1-eccentric and DRD2-striosome subtypes, with statistical tests supporting enrichment.
Evidence: Results: 'LGE-derived MSNs are more strongly enriched in the risk of SCZ than CGE and MGE-derived inhibitory neurons (p-value < 2.2e-16, chi-square test)'. Table and figures quantify enrichment.
“LGE-derived MSNs are more strongly enriched in the risk of SCZ than CGE and MGE-derived inhibitory neurons (p-value < 2.2e-16, chi-square test)”
supportedResults, paragraphs 2-4Reviewer 2
Multi-modal data support a heterogeneous temporal progression across GE subregions, with LGE showing declining neurogenic activity in mid-gestation and CGE exhibiting ongoing developmental progression through infancy.
The paper provides pseudotime analysis, spatial transcriptomics, and quantification of immature neurons to support this claim.
Evidence: Pseudotime scores, CosMx expression data, and quantification of immature neurons (40% CGE, 0.07% MGE, 1% LGE) in late gestation.
“CGE, MGE, and LGE develop at distinct rates, with the highest abundance of immature neurons in CGE, intermediate levels in MGE, and the lowest in LGE.”
supportedResults, paragraphs 5-8Reviewer 2
Identified regulatory programs that specify subtypes of BG principal cells, MSNs, via synchronized maturation of the 3D-epigenome.
The paper shows DMR analysis, TF motif enrichment, and synchronous maturation patterns in MSNs.
Evidence: DMR analysis, TF motif enrichment (AP-1, MEIS, etc.), and correlation analysis showing MSNs exhibit smaller within-age-group distances.
“MSNs exhibit smaller within-age-group distances among individual MSN cells and greater between-age-group distances, consistent with more synchronous maturation compared to inhibitory interneurons.”
supportedResults, paragraph 15-17Reviewer 2
In infant brains, we found a transient short-range enriched (SE) chromatin conformation during the transition between oligodendrocyte progenitors (OPCs) and oligodendrocytes (ODCs).
The paper identifies transitional OPC/ODC populations in 1-month brains and shows SE enrichment in these cells, supported by analysis of SE/LE ratios and trajectory analysis.
Evidence: SE/LE ratio analysis, identification of tOPC/tODC cells, and 3C pseudotime analysis.
“Transient short-range enriched (SE) chromatin conformation during the transition between oligodendrocyte progenitors (OPCs) and oligodendrocytes (ODCs)...”
supportedResults, paragraph 20-22Reviewers 2, 3
Gene regulatory regions active in MSNs were enriched in loci associated with genetic risk for neuropsychiatric disease.
The paper applies met-scDRS and LDSC to show enrichment of SCZ, BIP, ADHD, MDD risk in MSNs, especially in eccentric MSNs.
Evidence: met-scDRS scores, LDSC analysis, and chi-square test showing MSNs more enriched than other inhibitory neurons.
“LGE-derived MSNs are more strongly enriched in the risk of SCZ than CGE and MGE-derived inhibitory neurons (p-value < 2.2e-16, chi-square test).”
supportedAbstractReviewer 3
The study provides a single-cell and spatial 3D multi-omic atlas of developing human basal ganglia and inhibitory neurons.
The paper presents extensive snm3C-seq, spatial transcriptomics, and MERFISH data from multiple donors and brain regions, supporting the claim of a multi-omic atlas.
Evidence: The paper describes generating 155,225 new snm3C-seq profiles, integrating with existing datasets, and using spatial transcriptomics and MERFISH.
“A Single-Cell and Spatial 3D Multi-omic Atlas of Developing Human Basal Ganglia and Inhibitory Neurons”
supportedAbstractReviewer 3
The lateral GE (LGE) shows declining neurogenic activity in mid-gestation and caudal GE (CGE) exhibits ongoing developmental progression through infancy.
The paper provides pseudotime analysis, spatial transcriptomics, and quantification of immature neurons to support this claim.
Evidence: Results show lower pseudotime for CGE-derived cells in LV, higher expression of immature markers in CGE, and 40% of CGE-derived cells classified as immature in late gestation.
“the lateral GE (LGE) showing declining neurogenic activity in mid-gestation and caudal GE (CGE) exhibiting ongoing developmental progression through infancy.”