期刊
JOURNAL OF ORTHOPAEDIC RESEARCH
卷 28, 期 12, 页码 1600-1607出版社
WILEY
DOI: 10.1002/jor.21153
关键词
intervertebral disc degeneration aging; DNA repair proteoglycan; mouse models
类别
资金
- Pittsburgh Foundation
- Orthopaedic Research and Education Foundation
- NIEHS [ES016114]
- Ellison Medical Foundation [AG NS 0303 05]
- AOSpine North America Young Investigator Research Grant
Intervertebral disc degeneration (IDD) is a common and debilitating disorder that results in reduced flexibility of the spine pain and reduced mobility Risk factors for IDD include age, genetic predisposition, injury and other environmental factors such as smoking Loss of proteoglycans (PGs) contributes to IDD with advancing age Currently there is a lack of a model for rapid investigation of disc aging and evaluation of therapeutic interventions Here we examined progression of disc aging in a murine model of a human progeroid syndrome caused by deficiency of the DNA repair endonuclease, ERCC1-XPF (Ercc1(-/Delta) mice) The ERCC1 deficient mice showed loss of disc height and degenerative structural changes in their vertebral bodies similar to those reported for old rodents Compared to their wild type littermates Ercc1(-/Delta) mice also exhibit other age related IDD characteristics including premature loss of disc PG reduced matrix PG synthesis and enhanced apoptosis and cell senescence Finally, the onset of age associated disc pathologies was further accelerated in Ercc1(-/Delta) mice following chronic treatment with the chemotherapeutic agent mechlorethamine These results demonstrate that Ercc1(-/Delta) mice represent an accurate and rapid model of disc aging and provide novel evidence that DNA damage negatively impacts PG synthesis (c) 2010 Orthopaedic Research Society Published by Wiley Periodicals Inc J Orthop Res 28 1600-1607, 2010
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