Show Notes
PLD4 Deficiency and Lupus: When Nuclease Failure Ignites Autoimmunity
Music:
Enjoy the music based on this article at the end of the episode.
License:
This episode is based on an open-access article published under the Creative Commons Attribution 4.0 International License (CC BY 4.0) – https://creativecommons.org/licenses/by/4.0/
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Episode link: https://basebybase.com/episodes/pld4-deficiency-and-lupus-when-nuclease-failure-ignites-autoimmunity
QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2025-11-15.
QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited transcript sections describing PLD4 mutations, endosomal nucleic acid sensing (TLR7/9), PLD4 exonuclease activity assays, scRNA-seq and CyTOF analyses, exonuclease assays, Pld4−/− mouse data, and baricitinib/JAK-STAT therapeutic implications.
- transcript topics: PLD4 mutations and monogenic lupus; TLR7/TLR9 endosomal sensing and IFN signaling; PLD4 exonuclease activity in endosomes; Single-cell RNA sequencing of patient PBMCs (DCs/monocytes); CyTOF cytokine profiling in PBMCs; STING pathway involvement in PLD4 deficiency
QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 7
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0
Metadata Audited:
- article_doi
- article_title
- article_journal
- license
- episode_title
- episode_number
- season
Factual Items Audited:
- Five patients with SLE carrying biallelic PLD4 mutations
- PLD4 functions as an ssDNA/ssRNA exonuclease in endosomes to limit TLR7/9 signaling
- Mutations impair PLD4 exonuclease activity in vitro
- scRNA-seq and CyTOF show IFN/TLR pathway activation primarily in DCs and monocytes
- Pld4-deficient mice display autoimmunity and nephritis with expansion of pDCs and plasma cells
- Baricitinib reduces IFN signaling and rescues phenotypes in PLD4-deficient models
QC result: Pass.
