Evidence map›Paper›PMID 34504314›Full record

ArticleCell death and differentiation2022

Circular RNA Cwc27 contributes to Alzheimer's disease pathogenesis by repressing Pur-α activity.

Chenghuan Song, Yongfang Zhang, Wanying Huang, Jiyun Shi, Qiang Huang, Minjie Jiang, Yu Qiu, Tao Wang, Hongzhuan Chen, Hao Wang

Open access · hybridAbstract read
In one paragraph

Article in Cell death and differentiation, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 66 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
66citing papers in PubMed, 1 pooled it
5.4field-weighted citation impact, top 3% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

66 citing papers in PubMed, 1 synthesis or guideline pooled it, 101 citations in OpenAlex.

  1. Pooled it
  2. Review
  3. Review
  4. Article
  5. Review
  6. Review
  7. Article
  8. Review
  9. Circular RNAScience advances · 2026
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  11. Metabolic Adaptation and Pulmonary ceRNA Network Plasticity inInternational journal of molecular sciences · 2026
    Article
  12. Review
  13. Review
  14. Article
  15. Review
  16. Review
  17. Article
  18. Article
  19. Article
  20. CircARID1B Promotes MPPCell biochemistry and biophysics · 2025
    Article

6 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors at 2 institutions in 1 country.

Chenghuan Song *Department of Pharmacology and Chemical Biology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
Yongfang Zhang *Department of Pharmacology and Chemical Biology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
Wanying HuangDepartment of Pharmacology and Chemical Biology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
Jiyun ShiDepartment of Pharmacology and Chemical Biology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
Qiang HuangDepartment of Pharmacology and Chemical Biology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
Minjie JiangDepartment of Pharmacology and Chemical Biology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
Yu QiuDepartment of Pharmacology and Chemical Biology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
Tao WangShanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, 200030, China.
Hongzhuan ChenDepartment of Clinical Pharmacy, Institute of Interdisciplinary Integrative Medicine Research, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China. hongzhuan_chen@hotmail.com.ORCID http://orcid.org/0000-0002-5367-2949
Hao WangDepartment of Pharmacology and Chemical Biology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China. angela_wanghao@sjtu.edu.cn.ORCID http://orcid.org/0000-0002-2010-9906
Shanghai Jiao Tong University · CNShanghai University of Traditional Chinese Medicine · CN

Funding

National Natural Science Foundation of China (National Science Foundation of China) 81973297
6 · The paper itself

Abstract

Circular RNAs (circRNAs) have gained growing attention in participating in various biological processes and referring to multiply kinds of diseases. Although differentially expressed circRNA profiling in Alzheimer's disease (AD) has been established, little is known about the precise characteristic and functions of key circRNAs with direct relevance to AD in gene expression and disease-related cognition. Herein, we screened and identified circCwc27 as a novel circRNA implicated in AD. CircCwc27 was a neuronal-enriched circRNA that abundantly expressed in the brain and significantly upregulated in AD mice and patients. Knockdown of circCwc27 markedly improved AD-related pathological traits and ameliorated cognitive dysfunctions. Mechanistically, we excluded the miRNA decoy mechanism and focused on the important function of circRNA-RNA-binding protein (RBP) interaction in AD. CircCwc27 directly bound to purine-rich element-binding protein A (Pur-α), increased retention of cytoplasmic Pur-α, and suppressed Pur-α recruitment to the promoters of a cluster of AD genes, including amyloid precursor protein (APP), dopamine receptor D1 (Drd1), protein phosphatase 1, regulatory inhibitor subunit1B (Ppp1r1b), neurotrophic tyrosine kinase, receptor, type 1 (Ntrk1), and LIM homeobox 8 (Lhx8). Downregulation of circCwc27 enhanced the affinity of Pur-α binding to these promoters, leading to altered transcription of Pur-α targets. Moreover, Pur-α overexpression largely phenocopied circCwc27 knockdown in preventing Aβ deposition and cognitive decline. Together, our findings suggest significant functional consequences of a circRNA-protein interaction, that circCwc27, by associating with the regulatory protein Pur-α, may act as a crucial player in AD pathogenesis and represent a promising AD therapeutic target with clinical translational potential.

Indexed as

Alzheimer DiseaseMicroRNAsAmyloid beta-Protein PrecursorAnimalsBrainCyclophilinsHumansMiceRNARNA, CircularAmyloid beta-Protein PrecursorCwc27 protein, humanCyclophilinsMicroRNAsRNARNA, Circular

Identifiers

PMID34504314
PMCPMC8817017
OpenAlexW3197730739

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.