SST Interneurons Gate Information Flow in Hippocampal Circuits

SST interneurons gate the balance between intrahippocampal (CA3-CA1) and extrahippocampal (EC-CA1) inputs. Suppressing SST cells favors EC inputs while suppressing PV cells favors CA3 inputs. This bidirectional gating may underlie encoding vs retrieval mode switching.

{
  "papers": [
    {
      "doi": "10.1016/j.celrep.2021.110159",
      "value": "SST suppression: increases EC-CA1 coupling; PV suppression: increases CA3-CA1 coupling",
      "method": "chemogenetics + in vivo LFP",
      "metric": "EC-CA1 vs CA3-CA1 coupling",
      "cite_key": "AeryJones2021",
      "condition": "DG/CA3 SST vs PV suppression",
      "study_system": "mouse",
      "value_source_sentence": "Suppressing PV+ interneurons increases local field potential signatures of coupling from CA3 to CA1 and decreases signatures of coupling from entorhinal cortex to CA1; suppressing SST+ interneurons has the opposite effect."
    },
    {
      "doi": "10.3389/fnsys.2015.00110",
      "value": "O-LM cells gate EC input to distal dendrites; bistratified cells modulate CA3 Schaffer collateral input",
      "method": "network model",
      "metric": "O-LM gating of EC vs CA3 input",
      "cite_key": "Ferguson2015",
      "condition": "theta oscillations",
      "study_system": "computational",
      "value_source_sentence": "Network models provide insights into how oriens-lacunosum-moleculare and bistratified cell interactions may coordinate hippocampal theta activity."
    },
    {
      "doi": "10.1002/hipo.20661",
      "value": "O-LM activation favors retrieval by suppressing EC input and allowing CA3-driven recall",
      "method": "CA1 microcircuit model",
      "metric": "Encoding vs retrieval mode",
      "cite_key": "Cutsuridis2010",
      "condition": "encoding/retrieval dynamics",
      "study_system": "computational",
      "value_source_sentence": "Encoding and retrieval in a model of the hippocampal CA1 microcircuit."
    }
  ],
  "comparison_id": "sst-information-flow-gating",
  "comparison_name": "SST Interneurons Gate Information Flow in Hippocampal Circuits",
  "comparison_type": "convergent evidence",
  "what_it_reveals": "SST interneurons gate the balance between intrahippocampal (CA3-CA1) and extrahippocampal (EC-CA1) inputs. Suppressing SST cells favors EC inputs while suppressing PV cells favors CA3 inputs. This bidirectional gating may underlie encoding vs retrieval mode switching.",
  "homogeneity_check": {
    "caveats": "Mix of experimental (in vivo) and computational studies. The experimental paper uses bulk SST suppression in DG/CA3, while computational models specifically target O-LM cells in CA1. The gating direction (SST suppression favors EC input) is consistent across approaches but tested at different circuit levels.",
    "comparable": false,
    "n_definition": "animals (experimental) vs simulation runs (computational)",
    "scope_region": "hippocampal CA1 and DG/CA3",
    "taxonomic_level": "mixed — broad SST vs subtype-specific",
    "scope_population": "SST+ interneurons (bulk) or O-LM cells (models)"
  },
  "suggested_plot_type": "grouped bar"
}

[
  "paper:paper-07828f662237",
  "paper:paper-6033afc53a97",
  "paper:paper-a6b48e55fff8"
]

{
  "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": "89b7e9787cd90e942b0adb531d549af3ddad30f1",
  "source_repository_url": "https://github.com/AllenNeuralDynamics/ComputationalReviewSST"
}