Evidence map›Paper›PMID 28831269›Full record

ArticleJournal of pain research2017

Sex differences in complex regional pain syndrome type I (CRPS-I) in mice.

Chaoliang Tang, Juan Li, Wai Lydia Tai, Weifeng Yao, Bo Zhao, Junmou Hong, Si Shi, Song Wang, Zhongyuan Xia

Open access · goldAbstract read
In one paragraph

Article in Journal of pain research, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed, 2 pooled it
2.0field-weighted citation impact, top 14% 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

17 citing papers in PubMed, 2 syntheses or guidelines pooled it, 29 citations in OpenAlex.

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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 4 institutions in 2 countries.

Chaoliang TangDepartment of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province.
Juan LiDepartment of Anesthesiology, Anhui Provincial Hospital of Anhui Medical University, Hefei, Anhui Provence.
Wai Lydia TaiDepartment of Anaesthesiology, The University of Hong Kong, Hong Kong SAR.
Weifeng YaoDepartment of Anesthesiology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong Province.
Bo ZhaoDepartment of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province.
Junmou HongDepartment of Cardiovascular Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, China.
Si ShiDepartment of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province.
Song WangDepartment of Anesthesiology, Anhui Provincial Hospital of Anhui Medical University, Hefei, Anhui Provence.
Zhongyuan XiaDepartment of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province.
Wuhan University · CNAnhui Medical University · CNChinese University of Hong Kong · HKSun Yat-sen University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundSex differences have been increasingly highlighted in complex regional pain syndrome (CRPS) in clinical practice. In CRPS type I (CRPS-I), although inflammation and oxidative stress have been implicated in its pathogenesis, whether pain behavior and the underlying mechanism are sex-specific is unclear. In the present study, we sought to explore whether sex differences have an impact on inflammation, oxidative stress, and pain sensitivity in CRPS-I.

methodsChronic post-ischemia pain (CPIP) was established in both male and female mice as an animal model of CRPS-I. Edema and mechanical allodynia of bilateral hind paws were assessed after reperfusion. Blood samples were analyzed for serum levels of oxidative stress markers and inflammatory cytokines.

resultsBoth male and female mice developed edema. Male mice developed CPIP at day 3 after reperfusion; female mice developed CPIP at day 2 after reperfusion. Female mice displayed significantly earlier and higher mechanical allodynia in the ischemic hind paw, which was associated with higher serum levels of IL-2, TNF-α, isoprostanes, 8 OhdG, and malondialdehyde at day 2 after reperfusion. Moreover, female mice showed significantly lower SOD and IL-4 compared to male mice at day 2 after reperfusion.

conclusionOur results indicate that sex differences in inflammatory and oxidative stress states may play a central role in the sex-specific nociceptive hypersensitivity in CRPS-I, and offer a new insight into pharmacology treatments to improve pain management with CRPS.

Indexed as

chronic post-ischemia paincomplex regional pain syndromeinflammatory responseoxidative stresssex differences

Identifiers

PMID28831269
PMCPMC5548282
OpenAlexW2741418323

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LicenceCC BY-NC
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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.