Volume 54, Issue 4 pp. 1184-1197
Research Article

Intraarticular induction of interleukin-1β expression in the adult mouse, with resultant temporomandibular joint pathologic changes, dysfunction, and pain

Yu-Ching Lai

Yu-Ching Lai

University of Rochester School of Medicine & Dentistry, Rochester, New York

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Solomon S. Shaftel

Solomon S. Shaftel

University of Rochester School of Medicine & Dentistry, Rochester, New York

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Jen-nie H. Miller

Jen-nie H. Miller

University of Rochester School of Medicine & Dentistry, Rochester, New York

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Ross H. Tallents

Ross H. Tallents

University of Rochester School of Medicine & Dentistry, Rochester, New York

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Yoon Chang

Yoon Chang

University of Rochester School of Medicine & Dentistry, Rochester, New York

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Carl A. Pinkert

Carl A. Pinkert

University of Rochester School of Medicine & Dentistry, Rochester, New York

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John A. Olschowka

John A. Olschowka

University of Rochester School of Medicine & Dentistry, Rochester, New York

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Ian M. Dickerson

Ian M. Dickerson

University of Rochester School of Medicine & Dentistry, Rochester, New York

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J. Edward Puzas

J. Edward Puzas

University of Rochester School of Medicine & Dentistry, Rochester, New York

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M. Kerry O'Banion

M. Kerry O'Banion

University of Rochester School of Medicine & Dentistry, Rochester, New York

Drs. O'Banion and Kyrkanides have applied for a patent for the nucleic acids (patent pending PCT/US2005/042058).

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Stephanos Kyrkanides

Corresponding Author

Stephanos Kyrkanides

University of Rochester School of Medicine & Dentistry, Rochester, New York

Drs. O'Banion and Kyrkanides have applied for a patent for the nucleic acids (patent pending PCT/US2005/042058).

University of Rochester Eastman Dental Center, 625 Elmwood Avenue, Rochester, NY 14620Search for more papers by this author
First published: 29 March 2006
Citations: 49

Abstract

Objective

To examine the effects of intraarticular induction of interleukin-1β (IL-1β) expression in adult mice.

Methods

We used somatic mosaic analysis in a novel transgenic mouse with an inducible IL-1β transcription unit. Transgene activation was induced by Cre recombinase in the temporomandibular joints (TMJs) of adult transgenic mice (conditional knockin model). The effects of intraarticular IL-1β induction were subsequently evaluated at the cellular, histopathologic, and behavioral levels.

Results

We developed transgenic mice capable of germline transmission of a dormant transcription unit consisting of the mature form of human IL-1β as well as the reporter gene β-galactosidase driven by the rat procollagen 1A1 promoter. Transgene activation by a feline immunodeficiency virus Cre vector resulted in histopathologic changes, including articular surface fibrillations, cartilage remodeling, and chondrocyte cloning. We also demonstrated up-regulation of genes implicated in arthritis (cyclooxygenase 2, IL-6, matrix metalloproteinase 9). There was a lack of inflammatory cells in these joints. Behavioral changes, including increased orofacial grooming and decreased resistance to mouth opening, were used as measures of nociception and joint dysfunction, respectively. The significant increase in expression of the pain-related neurotransmitter calcitonin gene-related peptide (CGRP) in the sensory ganglia as well as the auxiliary protein CGRP receptor component protein of the calcitonin-like receptor in the brainstem further substantiated the induction of pain.

Conclusion

Induction of IL-1β expression in the TMJs of adult mice led to pathologic development, dysfunction, and related pain in the joints. The somatic mosaic model presented herein may prove useful in the preclinical evaluation of existing and new treatments for the management of joint pathologic changes and pain, such as in osteoarthritis.

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