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  • ISSN 1674-8301
  • CN 32-1810/R
Kang Jin Seok. Effects of methotrexate on collagen-induced arthritis in male Wistar rats[J]. The Journal of Biomedical Research, 2019, 33(4): 244-249. DOI: 10.7555/JBR.32.20170019
Citation: Kang Jin Seok. Effects of methotrexate on collagen-induced arthritis in male Wistar rats[J]. The Journal of Biomedical Research, 2019, 33(4): 244-249. DOI: 10.7555/JBR.32.20170019

Effects of methotrexate on collagen-induced arthritis in male Wistar rats

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  • Corresponding author:

    Jin Seok Kang, Department of Biomedical Laboratory Science, Namseoul University, 91 Daehak-ro, Seonghwan-eup, Sebuk-gu, Cheonan 31020, Republic of Korea. Tel/Fax: 82-41-580-2721/82-41-580-2932, E-mail: kang@nsu.ac.kr

  • Received Date: February 27, 2017
  • Revised Date: April 07, 2017
  • Accepted Date: May 31, 2017
  • Available Online: July 30, 2017
  • To evaluate the effect of methotrexate on collagen-induced arthritis, micro-computed tomography (micro-CT) and histopathological analyses were used in male Wistar rats. Rats were divided randomly into three groups. Group 1 was treated with 0.9% saline, and groups 2 and 3 were boosted with type Ⅱ collagen. From day 21 to 42, groups 1 and 2 were orally treated with 0.9% saline and group 3 was orally treated with 1.5 mg/kg methotrexate. All rats were sacrificed at day 42 after the first collagen treatment. Micro-CT analyses showed bony parameters, such as bone volume and trabecular number, were decreased in group 2 compared to group 1, and these parameters were recovered in group 3. Histopathological examination and pathological parameter scoring showed that the knee joints of rats in group 2 had severe joint destruction, showing cartilage and bone erosion, enlarged cavities with inflammatory cell infiltration and activation of synovial fibroblasts. By contrast, these changes were reduced in group 3. Taken together, methotrexate treatment showed therapeutic potential in male rat collagen-induced arthritis model, and micro-CT analysis and histopathological tools could be integrated to assess the quantification/qualification of arthritic lesions.
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