Developmental maturation of fast-spiking properties across studies

The fast-spiking phenotype emerges through coordinated postnatal maturation spanning the first 3-4 weeks: Kv3.1b expression begins in the first postnatal week and reaches adult levels by week 3, basket cell AP properties show 30-60% improvement over P6-P25, and thousands of genes undergo bidirectional transcriptional regulation between P7-P40. This convergent timeline demonstrates that the FS phenotype is not present at birth but is actively constructed through activity-dependent developmental programs.

{
  "papers": [
    {
      "n": 0,
      "doi": "10.1523/jneurosci.2890-08.2008",
      "value": "30-60",
      "method": "patch-clamp electrophysiology",
      "metric": "AP duration decrease during maturation (%)",
      "n_analyzed": "hippocampal basket cells P6-P25",
      "ci_or_error": null,
      "text_access": "abstract_only",
      "n_definition": "basket cells recorded at different postnatal ages",
      "scope_region": "hippocampus",
      "study_system": "mouse hippocampal basket cells",
      "taxonomic_level": "cell type",
      "scope_population": "basket cells",
      "value_source_sentence": "action potential duration, propagation time, duration of the release period, and decay time constant of IPSCs decreases by ~30-60%.",
      "experimental_conditions": "acute slices, P6 to P25"
    },
    {
      "n": 0,
      "doi": "10.1523/jneurosci.0105-09.2009",
      "value": "thousands",
      "method": "whole-genome microarray + electrophysiology",
      "metric": "Genes with bidirectional regulation P7-P40",
      "n_analyzed": "neocortical FS interneurons P7-P40",
      "ci_or_error": null,
      "text_access": "abstract_only",
      "n_definition": "FS cells profiled with microarrays",
      "scope_region": "neocortex",
      "study_system": "mouse neocortical FS interneurons",
      "taxonomic_level": "cell type",
      "scope_population": "FS interneurons",
      "value_source_sentence": "these changes are correlated with primarily monotonic but bidirectional transcriptional regulation of thousands of genes.",
      "experimental_conditions": "microarray + patch-clamp, P7-P40"
    },
    {
      "n": 0,
      "doi": "10.1523/jneurosci.16-02-00506.1996",
      "value": "postnatal weeks 1-3",
      "method": "immunohistochemistry + in situ hybridization",
      "metric": "Kv3.1b expression timeline",
      "n_analyzed": "PV-containing hippocampal interneurons",
      "ci_or_error": null,
      "text_access": "abstract_only",
      "n_definition": "PV+ neurons across postnatal development",
      "scope_region": "hippocampus",
      "study_system": "rat hippocampal PV interneurons",
      "taxonomic_level": "cell type",
      "scope_population": "PV-containing interneurons",
      "value_source_sentence": "Developmental expression and functional characterization of the potassium-channel subunit Kv3.1b in parvalbumin-containing interneurons of the rat hippocampus.",
      "experimental_conditions": "developmental time series"
    }
  ],
  "comparison_id": "developmental-maturation-timeline",
  "comparison_name": "Developmental maturation of fast-spiking properties across studies",
  "comparison_type": "convergent evidence",
  "what_it_reveals": "The fast-spiking phenotype emerges through coordinated postnatal maturation spanning the first 3-4 weeks: Kv3.1b expression begins in the first postnatal week and reaches adult levels by week 3, basket cell AP properties show 30-60% improvement over P6-P25, and thousands of genes undergo bidirectional transcriptional regulation between P7-P40. This convergent timeline demonstrates that the FS phenotype is not present at birth but is actively constructed through activity-dependent developmental programs.",
  "homogeneity_check": {
    "caveats": [
      "Different brain regions (hippocampus vs neocortex)",
      "Different species (rat vs mouse)",
      "Different metrics (AP properties, gene expression, Kv3 protein)",
      "Different age ranges with partial overlap"
    ],
    "n_definition_uniform": "false",
    "scope_region_uniform": "false",
    "taxonomic_level_uniform": "true",
    "scope_population_uniform": "true"
  },
  "suggested_plot_type": "timeline"
}

[
  "paper:paper-1ce8d352b58d",
  "paper:paper-591943f1ad14",
  "paper:paper-7c89812b5c9d"
]

{
  "mode": "public_source_pointer_with_short_context",
  "notes": [
    "Local review repositories are read-only inputs.",
    "SciDEX stores paper metadata, structured evidence, file pointers, and short citation contexts; it does not copy full review prose."
  ],
  "source_commit_sha": "df9fc7e8d455b084152c9d713558dae0013cef21",
  "source_repository_url": "https://github.com/AllenNeuralDynamics/ComputationalReviewPV"
}