Evidence map›Paper›PMID 35592320›Full record

ArticleFrontiers in immunology2022

Acutely Inhibiting AQP4 With TGN-020 Improves Functional Outcome by Attenuating Edema and Peri-Infarct Astrogliosis After Cerebral Ischemia.

Chengfeng Sun, Luyi Lin, Lekang Yin, Xiaozhu Hao, Jiaqi Tian, Xiaoxue Zhang, Yan Ren, Chanchan Li, Yanmei Yang

Open access · goldAbstract read
In one paragraph

Article in Frontiers in immunology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 53 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
53citing papers in PubMed, 2 pooled it
9.7field-weighted citation impact, top 1% 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

53 citing papers in PubMed, 2 syntheses or guidelines pooled it, 79 citations in OpenAlex.

  1. Pooled it
  2. The Role of Aquaporins in Epileptogenesis-A Systematic Review.International journal of molecular sciences · 2023
    Pooled it
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  19. Review
  20. Aquaporin-4 in Stroke and Brain Edema-Friend or Foe?International journal of molecular sciences · 2025
    Review
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

9 authors at 5 institutions in 1 country.

Chengfeng SunDepartment of Radiology, Huashan Hospital, Fudan University, Shanghai, China.
Luyi LinDepartment of Radiology, Huashan Hospital, Fudan University, Shanghai, China.
Lekang YinDepartment of Radiology, Zhongshan Hospital, Fudan University, Shanghai, China.
Xiaozhu HaoDepartment of Radiology, Huashan Hospital, Fudan University, Shanghai, China.
Jiaqi TianDepartment of Radiology, Renji Hospital, Shanghai Jiao Tong University, Shanghai, China.
Xiaoxue ZhangDepartment of Radiotherapy, Shanghai Eastern Hepatobiliary Surgery Hospital, Shanghai, China.
Yan RenDepartment of Radiology, Huashan Hospital, Fudan University, Shanghai, China.
Chanchan LiDepartment of Radiology, Huashan Hospital, Fudan University, Shanghai, China.
Yanmei YangDepartment of Radiology, Huashan Hospital, Fudan University, Shanghai, China.
Fudan University · CNHuashan Hospital · CNSecond Military Medical University · CNShanghai Jiao Tong University · CNThe First Affiliated Hospital, Sun Yat-sen University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background: Ischemic stroke is one of the leading causes of human death and disability. Brain edema and peri-infarct astrocyte reactivity are crucial pathological changes, both involving aquaporin-4 (AQP4). Studies revealed that acute inhibition of AQP4 after stroke diminishes brain edema, however, its effect on peri-infarct astrocyte reactivity and the subacute outcome is unclear. And if diffusion-weighted imaging (DWI) could reflect the AQP4 expression patterns is uncertain. Methods: Rats were subjected to middle cerebral artery occlusion (MCAO) and allocated randomly to TGN 020-treated and control groups. One day after stroke, brain swelling and lesion volumes of the rats were checked using T2-weighted imaging (T2-WI). Fourteen days after stroke, the rats successively underwent neurological examination, T2-WI and DWI with standard b-values and ultra-high b-values, apparent diffusion coefficient (ADC) was calculated correspondingly. Finally, the rats' brains were acquired and used for glial fibrillary acidic protein (GFAP) and AQP4 immunoreactive analysis. Results: At 1 day after stroke, the TGN-020-treated animals exhibited reduced brain swelling and lesion volumes compared with those in the control group. At 14 days after stroke, the TGN-020-treated animals showed fewer neurological function deficits and smaller lesion volumes. In the peri-infarct region, the control group showed evident astrogliosis and AQP4 depolarization, which were reduced significantly in the TGN-020 group. In addition, the ultra-high b-values of ADC (ADCuh) in the peri-infarct region of the TGN-020 group was higher than that of the control group. Furthermore, correlation analysis revealed that peri-infarct AQP4 polarization correlated negatively with astrogliosis extent, and ADCuh correlated positively with AQP4 polarization. Conclusion: We found that acutely inhibiting AQP4 using TGN-020 promoted neurological recovery by diminishing brain edema at the early stage and attenuating peri-infarct astrogliosis and AQP4 depolarization at the subacute stage after stroke. Moreover, ADCuh could reflect the AQP4 polarization.

Indexed as

Brain EdemaGliosisInfarction, Middle Cerebral ArteryAnimalsAquaporin 4Brain IschemiaMagnetic Resonance ImagingNiacinamideRatsStrokeThiadiazoles2-(nicotinamide)-1,3,4-thiadiazoleAqp4 protein, ratAquaporin 4NiacinamideThiadiazolesAQP4 polarizationastrogliosisglymphatic systemischemic strokeultra-high b-values diffusion weighted imaging

Identifiers

PMID35592320
PMCPMC9110854
OpenAlexW4225426990

What OpenQuestion holds

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Registered trials

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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.