Evidence map›Paper›PMID 28352316›Full record

ArticleExperimental and therapeutic medicine2017

Monocyte chemoattractant protein-1 contributes to morphine tolerance in rats with cancer-induced bone pain.

Lei Liu, Xiu-Juan Gao, Chun-Guang Ren, Ji-Hua Hu, Xian-Wen Liu, Ping Zhang, Zong-Wang Zhang, Zhi-Jian Fu

Open access · diamondAbstract read
In one paragraph

Article in Experimental and therapeutic medicine, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed
1.2field-weighted citation impact, top 20% 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

9 citing papers in PubMed, 14 citations in OpenAlex.

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  9. Optimization andFrontiers in pharmacology · 2017
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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

8 authors at 3 institutions in 1 country.

Lei LiuDepartment of Pain Management, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China; Department of Anesthesiology, Liaocheng People's Hospital, Liaocheng, Shandong 252000, P.R. China.
Xiu-Juan GaoDepartment of Anesthesiology, Liaocheng People's Hospital, Liaocheng, Shandong 252000, P.R. China.
Chun-Guang RenDepartment of Anesthesiology, Liaocheng People's Hospital, Liaocheng, Shandong 252000, P.R. China.
Ji-Hua HuDepartment of Anesthesiology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China.
Xian-Wen LiuDepartment of Anesthesiology, Liaocheng People's Hospital, Liaocheng, Shandong 252000, P.R. China.
Ping ZhangDepartment of Anesthesiology, Liaocheng People's Hospital, Liaocheng, Shandong 252000, P.R. China.
Zong-Wang ZhangDepartment of Anesthesiology, Liaocheng People's Hospital, Liaocheng, Shandong 252000, P.R. China.
Zhi-Jian FuDepartment of Pain Management, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China.
Liaocheng People's Hospital · CNShandong University · CNFirst Affiliated Hospital of Soochow University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Cancer-induced bone pain can severely compromise the life quality of patients, while tolerance limits the use of opioids in the treatment of cancer pain. Monocyte chemoattractant protein-1 (MCP-1) is known to contribute to neuropathic pain. However, the role of spinal MCP-1 in the development of morphine tolerance in patients with cancer-induced bone pain remains unclear. The aim of the present study was to investigate the role of spinal MCP-1 in morphine tolerance in bone cancer pain rats (MTBP rats). Bone cancer pain was induced by intramedullary injection of Walker 256 cells into the tibia of the rats, while morphine tolerance was induced by continuous intrathecal injection of morphine over a period of 9 days. In addition, anti-MCP-1 antibodies were intrathecally injected to rats in various groups in order to investigate the association of MCP-1 with mechanical and heat hyperalgesia using the paw withdrawal threshold (PWT) and thermal withdrawal latency (TWL) tests, respectively. Furthermore, MCP-1 and CCR2 expression levels were measured using reverse transcription-quantitative polymerase chain reaction (RT-qPCR) and western blot analysis, and CCR2 expression levels were measured using RT-qPCR. The results indicated that MCP-1 and CCR2 expression levels were significantly increased in the spinal cord of MTBP rats. Intrathecal administration of anti-MCP-1 neutralizing antibodies was observed to attenuate the mechanical and thermal allodynia in MTBP rats. Therefore, the upregulation of spinal MCP-1 and CCR2 expression levels may contribute to the development of mechanical allodynia in MTBP rats. In conclusion, MCP-1/CCR2 signaling may serve a crucial role in morphine tolerance development in rats suffering from cancer-induced bone pain.

Indexed as

bone cancer painC-C chemokine receptor type 2monocyte chemoattractant protein-1morphine tolerancespinal cord

Identifiers

PMID28352316
PMCPMC5348680
OpenAlexW2566708735

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LicenceCC BY-NC-ND
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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.