International Journal of Medical Sciences

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18 February 2019

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Int J Med Sci 2018; 15(1):77-85. doi:10.7150/ijms.22345

Research Paper

Gene and Protein Expression Profiles in a Mouse Model of Collagen-Induced Arthritis

Sun-Yeong Gwon1,3, Ki-Jong Rhee3, Ho Joong Sung1,2✉

1. Department of Biomedical Laboratory Science, College of Health Science, Eulji University, Seongnam-si, Gyeonggi-do, 13135, Republic of Korea;
2. Department of Senior Healthcare, BK21 plus Program, Graduated School, Eulji University, Daejeon, 34824, Republic of Korea;
3. Department of Biomedical Laboratory Science, College of Health Sciences, Yonsei University at Wonju, Wonju, Gangwon-do 26493, Republic of Korea.


The risk of rheumatoid arthritis (RA), an autoimmune disease, in the elderly population increases along with that of atherosclerosis, cardiovascular disease, type 2 diabetes, and Alzheimer's disease. Identifying specific biomarkers for RA can clarify the underlying molecular mechanisms and can aid diagnosis and patient care. To this end, the present study investigated the genes and proteins that are differentially expressed in RA using a mouse collagen-induced arthritis (CIA) model. We performed gene microarray and proteome array analyses using blood samples from the mice and found that 50 genes and 24 proteins were upregulated and 48 genes were downregulated by more than 2-fold in the CIA model relative to the control. The gene microarray and proteome array results were validated by evaluating the expression levels of select genes and proteins by real-time PCR and western blotting, respectively. We found that the level of integrin α2, which has not been previously reported as a biomarker of RA, was significantly increased in CIA mice as compared to controls. These findings provide a set of novel biomarkers that can be useful for diagnosing and evaluating the progression of RA.

Keywords: collagen-induced arthritis, microarray, proteome analysis, biomarker, integrin α2.

This is an open access article distributed under the terms of the Creative Commons Attribution (CC BY-NC) license ( See for full terms and conditions.
How to cite this article:
Gwon SY, Rhee KJ, Sung HJ. Gene and Protein Expression Profiles in a Mouse Model of Collagen-Induced Arthritis. Int J Med Sci 2018; 15(1):77-85. doi:10.7150/ijms.22345. Available from