Evidence map›Paper›PMID 33115476›Full record

ArticleJournal of neuroinflammation2020

Targeting connexin 43 provides anti-inflammatory effects after intracerebral hemorrhage injury by regulating YAP signaling.

Hailong Yu, Xiang Cao, Wei Li, Pinyi Liu, Yuanyuan Zhao, Lilong Song, Jian Chen, Beilei Chen, Wenkui Yu, Yun Xu

Open access · goldAbstract read
In one paragraph

Article in Journal of neuroinflammation, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 50 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
50citing papers in PubMed, 1 pooled it
3.3field-weighted citation impact, top 7% 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

50 citing papers in PubMed, 1 synthesis or guideline pooled it, 93 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Observational
  5. Article
  6. Article
  7. Manipulation therapy alleviates neuropathic painThe Korean journal of pain · 2026
    Article
  8. Article
  9. Article
  10. The CaCell reports. Medicine · 2026
    Article
  11. Article
  12. Review
  13. Article
  14. Review
  15. Article
  16. Review
  17. Review
  18. Article
  19. Article
  20. Article
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.

Hailong YuAffiliated of Drum Tower Hospital, Medical school of Nanjing University, Nanjing, Jiangsu, People's Republic of China.
Xiang CaoAffiliated of Drum Tower Hospital, Medical school of Nanjing University, Nanjing, Jiangsu, People's Republic of China.
Wei LiDepartment of Neurology, Northern Jiangsu People's Hospital, Yangzhou, Jiangsu, People's Republic of China.
Pinyi LiuAffiliated of Drum Tower Hospital, Medical school of Nanjing University, Nanjing, Jiangsu, People's Republic of China.
Yuanyuan ZhaoDepartment of Neurology, Northern Jiangsu People's Hospital, Yangzhou, Jiangsu, People's Republic of China.
Lilong SongDepartment of Neurology, Northern Jiangsu People's Hospital, Yangzhou, Jiangsu, People's Republic of China.
Jian ChenAffiliated of Drum Tower Hospital, Medical school of Nanjing University, Nanjing, Jiangsu, People's Republic of China.
Beilei ChenClinical Medical College of Yangzhou University, Yangzhou, Jiangsu, People's Republic of China.
Wenkui YuAffiliated of Drum Tower Hospital, Medical school of Nanjing University, Nanjing, Jiangsu, People's Republic of China. yudrnj@163.com.
Yun XuAffiliated of Drum Tower Hospital, Medical school of Nanjing University, Nanjing, Jiangsu, People's Republic of China. xuyun20042001@aliyun.com.ORCID http://orcid.org/0000-0001-5288-0319
Nanjing Drum Tower Hospital · CNDalian Medical University · CN

Funding

National Natural Science Foundation of China 81920108017, 81630028
6 · The paper itself

Abstract

backgroundIn the central nervous system (CNS), connexin 43 (Cx43) is mainly expressed in astrocytes and regulates astrocytic network homeostasis. Similar to Cx43 overexpression, abnormal excessive opening of Cx43 hemichannels (Cx43Hcs) on reactive astrocytes aggravates the inflammatory response and cell death in CNS pathologies. However, the role of excessive Cx43Hc opening in intracerebral hemorrhage (ICH) injury is not clear.

methodsHemin stimulation in primary cells and collagenase IV injection in C57BL/6J (B6) mice were used as ICH models in vitro and in vivo. After ICH injury, the Cx43 mimetic peptide Gap19 was used for treatment. Ethidium bromide (EtBr) uptake assays were used to measure the opening of Cx43Hcs. Western blotting and immunofluorescence were used to measure protein expression. qRT-PCR and ELISA were used to determine the levels of cytokines. Coimmunoprecipitation (Co-IP) and the Duolink in situ proximity ligation assay (PLA) were applied to measure the association between proteins.

resultsIn this study, Cx43 expression upregulation and excessive Cx43Hc opening was observed in mice after ICH injury. Delayed treatment with Gap19 significantly alleviated hematoma volume and neurological deficits after ICH injury. In addition, Gap19 decreased inflammatory cytokine levels in the tissue surrounding the hematoma and decreased reactive astrogliosis after ICH injury in vitro and in vivo. Intriguingly, Cx43 transcriptional activity and expression in astrocytes were significantly increased after hemin stimulation in culture. However, Gap19 treatment downregulated astrocytic Cx43 expression through the ubiquitin-proteasome pathway without affecting Cx43 transcription. Additionally, our data showed that Gap19 increased Yes-associated protein (YAP) nuclear translocation. This subsequently upregulated SOCS1 and SOCS3 expression and then inhibited the TLR4-NFκB and JAK2-STAT3 pathways in hemin-stimulated astrocytes. Finally, the YAP inhibitor, verteporfin (VP), reversed the anti-inflammatory effect of Gap19 in vitro and almost completely blocked its protective effects in vivo after ICH injury.

conclusionsThis study provides new insight into potential treatment strategies for ICH injury involving astroglial Cx43 and Cx43Hcs. Suppression of abnormal astroglial Cx43 expression and Cx43Hc opening by Gap19 has anti-inflammatory and neuroprotective effects after ICH injury.

Indexed as

Adaptor Proteins, Signal TransducingAnimalsAstrocytesCerebral HemorrhageCollagenasesConnexin 43CytokinesHeminInflammationMaleMicePeptide FragmentsSignal TransductionVerteporfinYAP-Signaling ProteinsAdaptor Proteins, Signal TransducingCollagenasesConnexin 43CytokinesHeminPeptide FragmentsTAT-Gap19 peptideVerteporfinYap1 protein, mouseYAP-Signaling ProteinsConnexin 43HemichannelsIntracerebral hemorrhage injuryReactive astrocyteYAP

Identifiers

PMID33115476
PMCPMC7594305
OpenAlexW3097111735

What Socratic holds

Textmetadata
LicenceCC BY
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 Socratic graph.