229: Inhibiting PCBP2 condensates in Alzheimer’s

Wang L et al., Nat Commun - Elevated PCBP2 forms liquid-like condensates that sequester mitochondrial and RNA-binding proteins, stabilize BACE1 mRNA, and promote amyloid pathology while the small molecule CN-0928 reduces PCBP2 via INTS1 to lower Aβ and improve cognition in AD models. Key terms: PCBP2, biomolecular condensates, BACE1, CN-0928, mitochondria.

Study Highlights:
PCBP2 protein is increased in AD patient brains and AD mouse models and forms enlarged, dynamic cytoplasmic condensates that undergo LLPS in vitro and in cells. PCBP2 condensates concentrate mitochondrial proteins and RNA-binding/NMD factors including UPF1, correlating with disrupted mitochondrial morphology, increased ROS, and reduced mitochondrial respiration. PCBP2 stabilizes BACE1 mRNA by sequestering NMD components into condensates and thereby impairs 3′UTR-dependent decay. The small molecule CN-0928 binds INTS1 at Arg-1404, lowers PCBP2 transcription and protein levels, reduces condensates, decreases BACE1 and Aβ, and improves cognitive performance in 5×FAD mice

Conclusion:
Targeting PCBP2 biomolecular condensates via INTS1 with CN-0928 offers a novel strategy to mitigate mitochondrial dysfunction and BACE1-driven amyloidogenesis in Alzheimer’s disease

Music:
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First author:
Wang L

Journal:
Nat Commun

DOI:
10.1038/s41467-025-65547-9

Reference:
Wang L, Xie X-Y, Pan Q-L, Zhang J, Zhou G-F, Zhang Q-L, Yan X-X, Xiang Y, Li C-L, He Y, Xiang X-J, Deng X-J, Wang Y-J, Zhou J-Y, Nie S & Chen G-J. Pharmacologic inhibition of PCBP2 biomolecular condensates relieves Alzheimer’s disease. Nat Commun. 2025;16:10514. https://doi.org/10.1038/s41467-025-65547-9

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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QC:
This episode was checked against the original article PDF and publication metadata for the episode release published on 2025-12-15.

QC Scope:
- article metadata and core scientific claims from the narration
- excludes analogies, intro/outro, and music
- transcript coverage: Audited the central mechanistic narrative (PCBP2 condensates, LLPS, mitochondrial sequestration, UPF1/BACE1 3'UTR regulation) and the therapeutic axis (CN-0928/INTS1) with in vivo cognitive outcomes in mouse models.
- transcript topics: PCBP2 elevation and LLPS condensates in AD models; Sequestration of mitochondrial proteins and UPF1; Mitochondrial dysfunction and ROS/ respiration effects; BACE1 mRNA stability via 3'UTR and UPF1 sequestration; CN-0928 reduces PCBP2 condensates and lowers BACE1/Aβ; INTS1 as CN-0928 target and Arg-1404 binding site

QC Summary:
- factual score: 10/10
- metadata score: 10/10
- supported core claims: 6
- claims flagged for review: 0
- metadata checks passed: 4
- metadata issues found: 0

Metadata Audited:
- article_doi
- article_title
- article_journal
- license

Factual Items Audited:
- PCBP2 levels elevated in AD brains and in AD mouse models
- PCBP2 forms biomolecular condensates that undergo LLPS
- PCBP2 condensates sequester mitochondrial proteins and UPF1
- Sequestration links to mitochondrial dysfunction (morphology, ROS, respiration)
- PCBP2 stabilizes BACE1 mRNA via 3'UTR and reduces mRNA decay
- CN-0928 reduces PCBP2 and condensates, lowers BAC...