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In Vivo Effects of a Single Intra-Articular Injection of 2% Lidocaine or 0.5% Bupivacaine on Articular Cartilage of Normal Horses

Authors

  • Perrine Piat DVM,

    Corresponding author
    • Comparative Orthopaedic Research Laboratory, Département de Sciences Cliniques, Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Canada
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  • Hélène Richard,

    1. Comparative Orthopaedic Research Laboratory, Département de Sciences Cliniques, Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Canada
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  • Guy Beauchamp PhD,

    1. Département de pathologie et microbiologie vétérinaires Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Canada
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  • Sheila Laverty MVB Diplomate ACVS & ECVS

    1. Comparative Orthopaedic Research Laboratory, Département de Sciences Cliniques, Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Canada
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  • Funded in part by Pfizer Grant, AVEQ Grant, Université de Montréal, Canadian Arthritis Network, Canadian Institutes of Health Research, IBEX (in kind support).

  • Presented in part at the 17th Annual Canadian Connective Tissue Conference, May 27–29th 2011, Montréal, Canada; Large Animal Residents’ Forum, 2011 ACVS Veterinary Symposium, November 3–5th 2011, Chicago, IL.

Corresponding Author

Dr. Perrine Piat, DVM, Centre Hospitalier Universitaire Vétérinaire, Faculté de Médecine Vétérinaire, Université de Montréal, C.P. 5000, Saint-Hyacinthe (QC), J2S 7C6, Canada

E-mail: perrine.piat@umontreal.ca

Abstract

Objective

To assess the effects of an intra-articular (IA) lidocaine or bupivacaine injection on synovial fluid (SF) biomarkers of cartilage metabolism.

Study Design

Experimental.

Animals

Horses (n = 6).

Methods

The study had 2 components, each with an identical design: the first arm assessed the effects of bupivacaine (0.5%) IA in the intercarpal joints and, after a 2-week washout period, the second was conducted to evaluate the effects of IA lidocaine (2%) in the tarsocrural joints. The mares were randomly assigned to receive the test local anesthetic in the target joint or the placebo (0.9% NaCl) in the contralateral joint. After a 2-week washout period, treatments were reversed, yielding 6 joints for each treatment. SF samples were collected for measurement of biomarkers of cartilage metabolism.

Results

IA bupivacaine or lidocaine induced a significant increase in both markers of cartilage matrix synthesis (CS846–aggrecan and CPII–type II collagen) suggesting an anabolic effect. Bupivacaine also resulted in an unanticipated decrease in both collagen degradation markers (C2C and C1,2C).

Conclusions

These results reveal an anabolic effect of single IA injections of local anesthetics on cartilage metabolism. Although collagen degradation biomarker results were not increased, it is possible that the anabolic response is because of an undetected cartilage insult, and requires further investigation.

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