Age-dependent changes in the inflammatory nociceptive behavior of mice

  • The processing of pain undergoes several changes in aging that affect sensory nociceptive fibers and the endogenous neuronal inhibitory systems. So far, it is not completely clear whether age-induced modifications are associated with an increase or decrease in pain perception. In this study, we assessed the impact of age on inflammatory nociception in mice and the role of the hormonal inhibitory systems in this context. We investigated the nociceptive behavior of 12-month-old versus 6–8-week-old mice in two behavioral models of inflammatory nociception. Levels of TRP channels, and cortisol as well as cortisol targets, were measured by qPCR, ELISA, and Western blot in the differently aged mice. We observed an age-related reduction in nociceptive behavior during inflammation as well as a higher level of cortisol in the spinal cord of aged mice compared to young mice, while TRP channels were not reduced. Among potential cortisol targets, the NF-κB inhibitor protein alpha (IκBα) was increased, which might contribute to inhibition of NF-κB and a decreased expression and activity of the inducible nitric oxide synthase (iNOS). In conclusion, our results reveal a reduced nociceptive response in aged mice, which might be at least partially mediated by an augmented inflammation-induced increase in the hormonal inhibitory system involving cortisol.

Download full text files

Export metadata

Additional Services

Share in Twitter Search Google Scholar
Author:Tanya King-HimmelreichGND, Christine Verena Möser, Miriam C. Wolters, Katrin Olbrich, Gerd GeisslingerORCiDGND, Ellen NiederbergerGND
Parent Title (English):International journal of molecular sciences
Publisher:Molecular Diversity Preservation International
Place of publication:Basel
Document Type:Article
Date of Publication (online):2015/12/13
Date of first Publication:2015/12/13
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2016/07/05
Tag:age; cortisol; inflammation; nociception
Page Number:12
First Page:27508
Last Page:27519
© 2015 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons by Attribution (CC-BY) license (
Institutes:Medizin / Medizin
Fachübergreifende Einrichtungen / Zentrum für Arzneimittelforschung, Entwicklung und Sicherheit (ZAFES)
Dewey Decimal Classification:6 Technik, Medizin, angewandte Wissenschaften / 61 Medizin und Gesundheit / 610 Medizin und Gesundheit
Licence (German):License LogoCreative Commons - Namensnennung 4.0