Abstract
Background
Systemic inflammation and pain sensitivity may contribute to the development and maintenance of chronic pain conditions.
Purpose
We examined the relationship between systemic inflammation as measured by C-reactive protein (CRP) and cold pain sensitivity in 198 female twins from the University of Washington Twin Registry. We also explored the potential role of familial factors in this relationship.
Methods
Linear regression modeling with generalized estimating equations examined the overall and within-pair associations.
Results
Higher levels of CRP were associated with higher pain sensitivity ratings at pain threshold (p = 0.02) and tolerance (p = 0.03) after adjusting for age, body mass index, time to reach pain threshold or tolerance, and clinical pain status. The magnitude of the associations remained the same in within-pair analyses controlling for familial factors.
Conclusions
The link between CRP and pain sensitivity may be due to non-shared environmental factors. CRP and pain sensitivity can be examined as potential biomarkers for chronic pain and other inflammatory conditions.
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Acknowledgments
This research was supported by the National Institutes of Health award R01AR051524 (Dr. Afari). Portions of this research were conducted at the University of Washington Institute of Translational Health Sciences supported by National Institutes of Health awards UL1RR025014, KL2RR025015, and TL1RR025016. Dr. Afari also is supported by the VA Center of Excellence for Stress and Mental Health. Dr. Strachan is supported in part by R21AI81347. We wish to thank the twins for taking part in the University of Washington Twin Registry and for their time and enthusiasm for this project. Portions of this study were presented at the 31st Annual Meeting of the Society of Behavioral Medicine, Seattle, WA.
Conflict of Interest Statement
None of the authors have any conflicts of interest to declare.
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Afari, N., Mostoufi, S., Noonan, C. et al. C-Reactive Protein and Pain Sensitivity: Findings from Female Twins. ann. behav. med. 42, 277–283 (2011). https://doi.org/10.1007/s12160-011-9297-6
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DOI: https://doi.org/10.1007/s12160-011-9297-6