Human Molecular Genetics Advance Access published online on November 10, 2004
Human Molecular Genetics, doi:10.1093/hmg/ddi013
© 2004 by Oxford University Press
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1 University of North Carolina at Chapel Hill, Comprehensive Center for Inflammatory Disorders, Columbia St., CB#7455, 2190 Old Dental Bld., Chapel Hill, NC, 27599, USA; Attagene, Inc., 7030 Kit Creek Road, Research Triangle Park NC, 27560, USA
* To whom correspondence should be addressed. Pain sensitivity varies substantially among humans. A significant part of the human population develops chronic pain conditions that are characterized by heightened pain sensitivity. We identified three genetic variants (haplotypes) of the gene encoding catecholamine-O-methyltransferase (COMT) that we designated as low pain sensitivity (LPS), average pain sensitivity (APS), and high pain sensitivity (HPS). We show that these haplotypes encompass 96% of the human population and five combinations of these haplotypes are strongly associated (P=0.0004) with variation in the sensitivity to experimental pain. The presence of even a single LPS haplotype diminishes, by as much as 2.3 times, the risk of developing myogenous temporomandibular joint disorder (TMD), a common musculoskeletal pain condition. The LPS haplotype produces much higher levels of COMT enzymatic activity compared to the APS or HPS haplotypes. Inhibition of COMT in the rat results in a profound increase in pain sensitivity. Thus, COMT activity substantially influences pain sensitivity, and the three major haplotypes determine COMT activity in humans that inversely correlates with pain sensitivity and the risk of developing TMD.
Article
Genetic basis for individual variations in pain perception and the development of a chronic pain condition
2 University of Adelaide, Australian Research Centre for Population Oral Health, Frome Rd, SA 5005, Adelaide, Australia
3 University of North Carolina, Comprehensive Center for Inflammatory Disorders, Columbia St., CB#7455, Chapel Hill, NC, 27599
4 Chulalongkorn University, Department of Oral Medicine, 254 Phyathai Road, Bangkok, 10330 Thailand
5 NIDCR, NIH, Pain & Neurosensory Mechanisms Branch, Bldg 10, Rm 3C-405, Bethesda, MD 20892-1258, USA; Laboratory of Neurogenetics, NIAAA, NIH, 12420 Parklawn Drive, Park 5 Building, Rockville, MD, 20852, USA
6 Laboratory of Neurogenetics, NIAAA, NIH, 12420 Parklawn Drive, Park 5 Building, Rockville, MD, 20852, USA
7 NCBI, NIH, 6404 Landon Lane, 8600 Rockville Pike, Bethesda, MD 20894, USA
8 Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry RAS, Ul. Miklukho-Maklaya, 16/10, 117997, Moscow, Russia
9 NIDCR, NIH, Pain & Neurosensory Mechanisms Branch, Bldg 10, Rm 3C-405, Bethesda, MD 20892-1258, USA
10 Attagene, Inc., 7030 Kit Creek Road, Research Triangle Park NC, 27560, USA
Luda Diatchenko, E-mail: lbdiatch{at}email.unc.edu
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