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. 2004 Jun;109(3):488-496.
doi: 10.1016/j.pain.2004.02.027.

Genetic influence on variability in human acute experimental pain sensitivity associated with gender, ethnicity and psychological temperament

Hyungsuk Kim  1 , John K Neubert, Anitza San Miguel, Ke Xu, Raj K Krishnaraju, Michael J Iadarola, David Goldman, Raymond A Dionne
Affiliations

Genetic influence on variability in human acute experimental pain sensitivity associated with gender, ethnicity and psychological temperament

Hyungsuk Kim et al. Pain. 2004 Jun.

Abstract

While a variety of cultural, psychological and physiological factors contribute to variability in both clinical and experimental contexts, the role of genetic factors in human pain sensitivity is increasingly recognized as an important element. This study was performed to evaluate genetic influences on variability in human pain sensitivity associated with gender, ethnicity and temperament. Pain sensitivity in response to experimental painful thermal and cold stimuli was measured with visual analogue scale ratings and temperament dimensions of personality were evaluated. Loci in the vanilloid receptor subtype 1 gene (TRPV1), delta opioid receptor subtype 1 gene (OPRD1) and catechol O-methyltransferase gene (COMT) were genotyped using 5' nuclease assays. A total of 500 normal participants (306 females and 194 males) were evaluated. The sample composition was 62.0% European American, 17.4% African American, 9.0% Asian American, and 8.6% Hispanic, and 3.0% individuals with mixed racial parentage. Female European Americans with the TRPV1 Val(585) Val allele and males with low harm avoidance showed longer cold withdrawal times based on the classification and regression tree (CART) analysis. CART identified gender, an OPRD1 polymorphism and temperament dimensions of personality as the primary determinants of heat pain sensitivity at 49 degrees C. Our observations demonstrate that gender, ethnicity and temperament contribute to individual variation in thermal and cold pain sensitivity by interactions with TRPV1 and OPRD1 single nucleotide polymorphisms.

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