Evidence map›Paper›PMID 39897904›Full record

ArticleHeliyon2025

Early prevention of carrageenan-induced peripheral/spinal inflammation suppresses microglial hyperreactivity in the trigeminal spinal subnucleus caudalis and alleviates chronic facial nociception.

Toru Yamamoto, Mitsuhiro Yoshida, Yuhei Koyama, Yatendra Mulpuri, Eiji Imado, Kana Oue, Mitsuru Doi, Yoshitaka Shimizu, Naotaka Kishimoto, Hiroshi Hanamoto and 1 more

Abstract read
In one paragraph

Article in Heliyon, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
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

1 citing paper in PubMed.

  1. 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

11 authors.

Toru YamamotoDivision of Dental Anesthesiology, Faculty of Dentistry & Graduate School of Medicine and Dental Sciences, Niigata University, Niigata, Japan.
Mitsuhiro YoshidaDepartment of Dental Anesthesiology, Division of Oral and Maxillofacial Surgery and Oral Medicine, Hiroshima University Hospital, Hiroshima, Japan.
Yuhei KoyamaDepartment of Oral and Maxillofacial Surgery, Dokkyo Medical University School of Medicine, Tochigi, Japan.
Yatendra MulpuriTranslational Research Center, New York University College of Dentistry, New York, USA.
Eiji ImadoDepartment of Dental Anesthesiology, Division of Oral and Maxillofacial Surgery and Oral Medicine, Hiroshima University Hospital, Hiroshima, Japan.
Kana OueDepartment of Dental Anesthesiology, Division of Oral and Maxillofacial Surgery and Oral Medicine, Hiroshima University Hospital, Hiroshima, Japan.
Mitsuru DoiDepartment of Dental Anesthesiology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan.
Yoshitaka ShimizuDepartment of Dental Anesthesiology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan.
Naotaka KishimotoDivision of Dental Anesthesiology, Faculty of Dentistry & Graduate School of Medicine and Dental Sciences, Niigata University, Niigata, Japan.
Hiroshi HanamotoDepartment of Dental Anesthesiology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan.
Kenji SeoDivision of Dental Anesthesiology, Faculty of Dentistry & Graduate School of Medicine and Dental Sciences, Niigata University, Niigata, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In this study, we investigated the mechanisms underlying carrageenan-induced chronic pain and the therapeutic effect of the anti-inflammatory drug meloxicam. Rats were injected with 3 % carrageenan into the masseter muscle. These rats exhibited acute and chronic hypersensitivity to mechanical stimuli for 6 weeks after injection. Pre-treatment with meloxicam prevented carrageenan-induced chronic hypersensitivity. Furthermore, minocycline and dexamethasone, but not acetaminophen, suppressed carrageenan-induced hypersensitivity in the chronic phase. Microglial reactivity in the trigeminal spinal subnucleus caudalis (Vc) was assessed by immunohistochemistry 3 days after treatment. The reactivity of microglial cells in the Vc was increased in carrageenan-treated rats compared with vehicle-injected rats. Meloxicam and dexamethasone, but not acetaminophen, prevented carrageenan-induced microglial hyperreactivity in the Vc. These results suggest that early prevention of peripheral/spinal inflammation suppresses microglial reactivity in the Vc and inhibits the development of orofacial chronic pain.

Indexed as

CarrageenanInflammationMicrogliaOrofacial chronic painTrigeminal spinal subnucleus caudalis

Identifiers

PMID39897904
PMCPMC11782953

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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.