Evidence map›Paper›PMID 34384355›Full record

ArticleThe journal of headache and pain2021

HMGB1, NLRP3, IL-6 and ACE2 levels are elevated in COVID-19 with headache: a window to the infection-related headache mechanism.

Hayrunnisa Bolay, Ömer Karadas, Bilgin Oztürk, Riza Sonkaya, Bahar Tasdelen, Tuba D S Bulut, Özlem Gülbahar, Aynur Özge, Betül Baykan

Open access · goldAbstract read
In one paragraph

Article in The journal of headache and pain, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed, 2 pooled it
7.1field-weighted citation impact, top 2% 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

36 citing papers in PubMed, 2 syntheses or guidelines pooled it, 71 citations in OpenAlex.

  1. Pooled it
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  6. Involvement of role of HMGB1-NLRP3 pathway in systemic disorders.Frontiers in cell and developmental biology · 2025
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  18. Headache in COVID-19 and Long COVID: to Know Facts for Clinical Practice.Current neurology and neuroscience reports · 2023
    Review
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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 1 country.

Hayrunnisa BolayDepartment of Neurology and Algology, Neuropsychiatry Center, Neuroscience and Neurotechnology Center (NÖROM), Gazi University Hospital, Medical Faculty, Besevler, 06510, Ankara, Turkey. hbolay@gazi.edu.tr.ORCID http://orcid.org/0000-0002-3357-7733
Ömer KaradasNeurology Department, University of Health Science, Gülhane School of Medicine, Ankara, Turkey.
Bilgin OztürkNeurology Department, University of Health Science, Gülhane School of Medicine, Ankara, Turkey.
Riza SonkayaNeurology Department, University of Health Science, Gülhane School of Medicine, Ankara, Turkey.
Bahar TasdelenDepartment of Biostatistics and Medical Informatics, Mersin University, Medical Faculty, Mersin, Turkey.
Tuba D S BulutDepartment of Medical Biochemistry, Gazi University, Medical Faculty, Ankara, Turkey.
Özlem GülbaharDepartment of Medical Biochemistry, Gazi University, Medical Faculty, Ankara, Turkey.
Aynur ÖzgeDepartment of Neurology and Algology, Mersin University, Medical Faculty, Mersin, Turkey.
Betül BaykanIstanbul Faculty of Medicine, Department of Neurology, Headache Center, Istanbul University, Istanbul, Turkey.
Gazi University · TRSağlık Bilimleri Üniversitesi · TRMersin Üniversitesi · TRIstanbul University · TR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

BACKGROUND AND

aimPathogenesis of COVID-19 -related headache is unknown, though the induction of the trigeminal neurons through inflammation is proposed. We aimed to investigate key systemic circulating inflammatory molecules and their clinical relations in COVID-19 patients with headache.

methodsThis cross-sectional study enrolled 88 COVID-19 patients, hospitalized on a regular ward during the second wave of the pandemic. Clinical characteristics of COVID-19 patients were recorded, and laboratory tests were studied.

resultsThe mean ages of 48 COVID-19 patients with headache (47.71 ± 10.8) and 40 COVID-19 patients without headache (45.70 ± 12.72) were comparable. COVID-19 patients suffered from headache had significantly higher serum levels of HMGB1, NLRP3, ACE2, and IL-6 than COVID-19 patients without headache, whereas CGRP and IL-10 levels were similar in the groups. Angiotensin II level was significantly decreased in the headache group. COVID-19 patients with headache showed an increased frequency of pulmonary involvement and increased D- dimer levels. Furthermore, COVID-19 was more frequently associated with weight loss, nausea, and diarrhea in patients with headache. Serum NLRP3 levels were correlated with headache duration and hospital stay, while headache response to paracetamol was negatively correlated with HMGB1 and positively associated with IL-10 levels.

conclusionStronger inflammatory response is associated with headache in hospitalized COVID-19 patients with moderate disease severity. Increased levels of the circulating inflammatory and/or nociceptive molecules like HMGB1, NLRP3, and IL-6 may play a role in the potential induction of the trigeminal system and manifestation of headache secondary to SARS-CoV-2 infection.

Indexed as

COVID-19HMGB1 ProteinCross-Sectional StudiesHeadacheHumansInterleukin-6NLR Family, Pyrin Domain-Containing 3 ProteinPeptidyl-Dipeptidase ASARS-CoV-2HMGB1 ProteinInterleukin-6NLR Family, Pyrin Domain-Containing 3 ProteinPeptidyl-Dipeptidase AACE2Angiotensin IICGRPCOVID-19HeadacheHMGB1IL-10IL-6InflammationNLRP3

Identifiers

PMID34384355
PMCPMC8358545
OpenAlexW3181660585

What OpenQuestion 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 OpenQuestion graph.