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Genetic susceptibility to postherniotomy pain. The influence of polymorphisms in the Mu opioid receptor, TNF-α, GRIK3, GCH1, BDNF and CACNA2D2 genes
Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Surgery.
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2016 (English)In: Scandinavian Journal of Pain, ISSN 1877-8860, E-ISSN 1877-8879Article in journal (Refereed) Published
Abstract [en]

Background and aims

Despite improvements in surgical technique, 5%–8% of patients undergoing herniorrhaphy still suffer from clinically relevant persistent postherniotomy pain. This is a problem at both individual and society levels. The aim of this study was to determine whether or not a single nucleotide polymorphism in a specific gene contributes to the development of persistent pain after surgery.


One hundred individuals with persistent postherniotomy pain, along with 100 without pain matched for age, gender and type of surgery were identified in a previous cohort study on patients operated for groin hernia. All patients underwent a thorough sensory examination and blood samples were collected. DNA was extracted and analysed for single nucleotide polymorphism in the Mu opioid receptor, TNF-α, GRIK3, GCH1, BDNF and CACNA2D2 genes.


Patients with neuropathic pain were found to have a homozygous single nucleotide polymorph in the TNF-α gene significantly more often than pain-free patients (P = 0.036, one-tailed test).


SNP in the TNF-α gene has a significant impact on the risk for developing PPSP.


The result suggests the involvement of genetic variance in the development of pain and this requires further investigation.

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Keyword [en]
Persistent postsurgical pain, Single nucleotide polymorphism, Genetic variance, TNF-α, Groin hernia
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URN: urn:nbn:se:umu:diva-118514OAI: diva2:913476
Available from: 2016-03-21 Created: 2016-03-21 Last updated: 2016-03-21

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