Evidence map›Paper›PMID 34717678›Full record

ArticleJournal of neuroinflammation2021

Microglia and macrophage exhibit attenuated inflammatory response and ferroptosis resistance after RSL3 stimulation via increasing Nrf2 expression.

Yu Cui, Zhaolong Zhang, Xin Zhou, Zhiyuan Zhao, Rui Zhao, Xiangyu Xu, Xiangyi Kong, Jinyang Ren, Xujin Yao, Qian Wen and 4 more

Open access · goldAbstract read
In one paragraph

Article in Journal of neuroinflammation, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 124 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
124citing papers in PubMed, 1 pooled it
18.6field-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

124 citing papers in PubMed, 1 synthesis or guideline pooled it, 194 citations in OpenAlex.

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64 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

14 authors at 1 institution in 1 country.

Yu CuiInstitute of Neuroregeneration & Neurorehabilitation, Department of Pathophysiology, Qingdao University, Ningxia Road 308, Qingdao, 266071, China.
Zhaolong ZhangThe Affiliated Hospital of Qingdao University, Jiangsu Road 16, Qingdao, 266000, Shandong, China.
Xin ZhouInstitute of Neuroregeneration & Neurorehabilitation, Department of Pathophysiology, Qingdao University, Ningxia Road 308, Qingdao, 266071, China.
Zhiyuan ZhaoThe Affiliated Hospital of Qingdao University, Jiangsu Road 16, Qingdao, 266000, Shandong, China.
Rui ZhaoThe Affiliated Hospital of Qingdao University, Jiangsu Road 16, Qingdao, 266000, Shandong, China.
Xiangyu XuThe Affiliated Hospital of Qingdao University, Jiangsu Road 16, Qingdao, 266000, Shandong, China.
Xiangyi KongInstitute of Neuroregeneration & Neurorehabilitation, Department of Pathophysiology, Qingdao University, Ningxia Road 308, Qingdao, 266071, China.
Jinyang RenInstitute of Neuroregeneration & Neurorehabilitation, Department of Pathophysiology, Qingdao University, Ningxia Road 308, Qingdao, 266071, China.
Xujin YaoInstitute of Neuroregeneration & Neurorehabilitation, Department of Pathophysiology, Qingdao University, Ningxia Road 308, Qingdao, 266071, China.
Qian WenDepartment of Biomedical Center, Qingdao University, Qingdao, 266071, China.
Feifei GuoSchool of Basic Medicine, Qingdao University, Ningxia Road 308, Qingdao, 266071, China.
Shengli GaoSchool of Basic Medicine, Qingdao University, Ningxia Road 308, Qingdao, 266071, China.
Jiangdong SunInstitute of Neuroregeneration & Neurorehabilitation, Department of Pathophysiology, Qingdao University, Ningxia Road 308, Qingdao, 266071, China.
Qi WanInstitute of Neuroregeneration & Neurorehabilitation, Department of Pathophysiology, Qingdao University, Ningxia Road 308, Qingdao, 266071, China. qiwan1@hotmail.com.ORCID http://orcid.org/0000-0001-6014-1620
Qingdao University · CN

Funding

National Key R&D Program of China 2019YFC0120000; 2018YFC1312300National Natural Science Foundation of China 31900634National Natural Science Foundation of China 82071385the Key Research and Development Project of Shandong 2019JZZY021010
6 · The paper itself

Abstract

backgroundMany neurological diseases involve neuroinflammation, during which overproduction of cytokines by immune cells, especially microglia, can aggregate neuronal death. Ferroptosis is a recently discovered cell metabolism-related form of cell death and RSL3 is a well-known inducer of cell ferroptosis. Here, we aimed to investigate the effects of RSL3 in neuroinflammation and sensitivity of different type of microglia and macrophage to ferroptosis.

methodsHere, we used quantitative RT-PCR analysis and ELISA analysis to analyze the production of proinflammatory cytokine production of microglia and macrophages after lipopolysaccharides (LPS) stimulation. We used CCK8, LDH, and flow cytometry analysis to evaluate the sensitivity of different microglia and macrophages to RSL3-induced ferroptosis. Western blot was used to test the activation of inflammatory signaling pathway and knockdown efficiency. SiRNA-mediated interference was conducted to knockdown GPX4 or Nrf2 in BV2 microglia. Intraperitoneal injection of LPS was performed to evaluate systemic inflammation and neuroinflammation severity in in vivo conditions.

resultsWe found that ferroptosis inducer RSL3 inhibited lipopolysaccharides (LPS)-induced inflammation of microglia and peritoneal macrophages (PMs) in a cell ferroptosis-independent manner, whereas cell ferroptosis-conditioned medium significantly triggered inflammation of microglia and PMs. Different type of microglia and macrophages showed varied sensitivity to RSL3-induced ferroptosis. Mechanistically, RSL3 induced Nrf2 protein expression to inhibit RNA Polymerase II recruitment to transcription start site of proinflammatory cytokine genes to repress cytokine transcription, and protect cells from ferroptosis. Furthermore, simultaneously injection of RSL3 and Fer-1 ameliorated LPS-induced neuroinflammation in in vivo conditions.

conclusionsThese data revealed the proinflammatory role of ferroptosis in microglia and macrophages, identified RSL3 as a novel inhibitor of LPS-induced inflammation, and uncovered the molecular regulation of microglia and macrophage sensitivity to ferroptosis. Thus, targeting ferroptosis in diseases by using RSL3 should consider both the pro-ferroptosis effect and the anti-inflammation effect to achieve optimal outcome.

Indexed as

AnimalsCarbolinesCell SurvivalDose-Response Relationship, DrugFemaleFerroptosisGene ExpressionInflammation MediatorsLipopolysaccharidesMacrophagesMaleMiceMice, Inbred C57BLMicrogliaNF-E2-Related Factor 2RAW 264.7 CellsCarbolinesInflammation MediatorsLipopolysaccharidesNfe2l2 protein, mouseNF-E2-Related Factor 2RSL3 compoundFerroptosisLPSMacrophageMicrogliaNeuroinflammationRSL3

Identifiers

PMID34717678
PMCPMC8557003
OpenAlexW3208841969

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.