PMID- 24300227 OWN - NLM STAT- MEDLINE DCOM- 20150512 LR - 20191210 IS - 1536-5409 (Electronic) IS - 0749-8047 (Linking) VI - 30 IP - 10 DP - 2014 Oct TI - The interleukin-1alpha gene C>T polymorphism rs1800587 is associated with increased pain intensity and decreased pressure pain thresholds in patients with lumbar radicular pain. PG - 869-74 LID - 10.1097/AJP.0000000000000048 [doi] AB - OBJECTIVES: Previous studies have suggested that many inflammatory cytokines, including interleukin (IL)-1alpha, may be associated with lumbar radicular pain after disk herniation. In the present study, we examined how variability of the IL-1alpha gene affects pain intensity and the pressure pain threshold (PPT) in patients with symptomatic disk herniation. MATERIALS AND METHODS: A total of 121 patients with lumbar radicular pain due to disk herniation were recruited from Oslo University Hospital, Norway, and followed up at 6 weeks and 12 months. The primary outcome measures were pain intensity scores for the lower back and legs using a visual analog pain scale (VAS) and PPT for the gluteal muscles. Genotyping was carried out using a predesigned TaqMan assay for IL-1alpha rs1800587. The effect of the IL-1alpha genotype on the VAS and PPT was analyzed by repeated measure analyses of variance. RESULTS: The IL-1alpha gene C>T polymorphism rs1800587 affected VAS and PPT scores in patients with symptomatic disk herniation. Patients with the CT/TT genotype reported a higher VAS leg pain intensity (P=0.002) and also a lower PPT in the gluteal muscles (left P=0.016; right P=0.016) compared with patients with the CC genotype during 1 year of follow-up. DISCUSSION: The present data show that the IL-1alpha CT/TT genotype rs1800587 may be associated with increased pain intensity and corresponding reduced PPT during the first year after disk herniation. FAU - Schistad, Elina I AU - Schistad EI AD - *Department of Physical Medicine and Rehabilitation, Oslo University Hospital, Ullevaal daggerFaculty of Medicine section signDepartment of Molecular Biosciences, University of Oslo double daggerNational Institute of Occupational Health, Oslo, Norway. FAU - Jacobsen, Line M AU - Jacobsen LM FAU - Roe, Cecilie AU - Roe C FAU - Gjerstad, Johannes AU - Gjerstad J LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Clin J Pain JT - The Clinical journal of pain JID - 8507389 RN - 0 (Interleukin-1alpha) SB - IM MH - Adolescent MH - Adult MH - Female MH - Follow-Up Studies MH - Genetic Association Studies MH - Genotype MH - Humans MH - Interleukin-1alpha/*genetics MH - Intervertebral Disc Displacement/*complications/*genetics/surgery MH - Leg/innervation MH - Lumbosacral Region MH - Male MH - Middle Aged MH - Outcome Assessment, Health Care MH - Pain/*etiology/genetics MH - Pain Threshold/*physiology MH - Polymorphism, Single Nucleotide/*genetics MH - Pressure/adverse effects MH - Retrospective Studies MH - Young Adult EDAT- 2013/12/05 06:00 MHDA- 2015/05/13 06:00 CRDT- 2013/12/05 06:00 PHST- 2013/12/05 06:00 [entrez] PHST- 2013/12/05 06:00 [pubmed] PHST- 2015/05/13 06:00 [medline] AID - 10.1097/AJP.0000000000000048 [doi] PST - ppublish SO - Clin J Pain. 2014 Oct;30(10):869-74. doi: 10.1097/AJP.0000000000000048.