Evidence map›Paper›PMID 25043824›Full record

ArticleThe journal of headache and pain2014

Bi-allelic and tri-allelic 5-HTTLPR polymorphisms and triptan non-response in cluster headache.

Markus Schürks, Antje Frahnow, Hans-Christoph Diener, Tobias Kurth, Dieter Rosskopf, Hans-Jörgen Grabe

Open access · goldAbstract read
In one paragraph

Article in The journal of headache and pain, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
0.4field-weighted citation impact, top 36% 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

5 citing papers in PubMed, 11 citations in OpenAlex.

  1. Hallmarks of primary headache: part 3 - cluster headache.The journal of headache and pain · 2025
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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

6 authors at 2 institutions in 2 countries.

Markus SchürksDepartment of Neurology, University Hospital Essen, Hufelandstrasse 55, 45122 Essen, Germany. markus.schuerks@uni-due.de.
Antje Frahnow
Hans-Christoph Diener
Tobias Kurth
Dieter Rosskopf
Hans-Jörgen Grabe
Essen University Hospital · DEInserm · FR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundTriptans are only effective in terminating cluster headache (CH) attacks in 70-80% of patients. Pharmacogenetic aspects of the serotonin metabolism, specifically variation in the 5-HTTLPR may be involved.

methodsGenetic association study in a well-defined cohort of 148 CH patients with information on drug response to triptans. CH was diagnosed according to the criteria of the International Headache Society. Genotypes of the 43-bp insdel (rs4795541) and A > G (rs25531) polymorphisms in the 5-HTTLPR promoter region were detected by restriction fragment length polymorphism analysis. We used logistic regression analysis to investigate the association between bi-allelic and tri-allelic genotypes and triptan non-response with genotype models.

resultsMean age at study entry among patients was 44.6 ± 10.5 years, 77.7% were men. The genotype distribution both for the bi-allelic and the tri-allelic polymorphism was in Hardy-Weinberg equilibrium. We did not find an association of the bi-allelic polymorphism with triptan non-response. While the effect estimates for the S variant of the tri-allelic polymorphisms suggested increased odds of triptan non-response in CH patients (multivariable-adjusted odds ratio [95% confidence interval]: L*L* genotype-reference; L*S* genotype-1.33 [0.53-3.32]; S*S* genotype-1.46 [0.54-3.98]), the results were not statistically significant.

conclusionsData from our study do not indicate a role of bi-allelic and tri-allelic genotypes of the 5-HTTLPR polymorphism in triptan non-response in CH.

Indexed as

AdultAllelesCluster HeadacheFemaleGenotypeHumansMaleMiddle AgedPharmacogeneticsPolymorphism, GeneticSerotonin Plasma Membrane Transport ProteinsTryptaminesSerotonin Plasma Membrane Transport ProteinsSLC6A4 protein, humanTryptamines

Identifiers

PMID25043824
PMCPMC4112603
OpenAlexW2099809369

What OpenQuestion holds

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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.