Rheumatoid arthritis (RA) is a systemic autoimmune disease that is initiated and maintained by various inflammatory/immune cells and their cytokines, leading to cartilage degradation and bone erosion. Despite its potent therapeutic efficacy on RA, the oral administration of methotrexate (MTX) provokes serious adverse systemic complications, thus necessitating the local application of MTX. Here, we show that transcutaneous MTX (TC-MTX) can efficiently penetrate joint skin ex vivo and in vivo, and that TC-MTX can significantly improve the various inflammatory symptoms associated with RA. Further, TC-MTX preserved the joint-structures in mice with collagen-induced arthritis (CIA), which was also confirmed by three-dimensional micro-computed tomography scan. TC-MTX markedly decreased the secretion of inflammatory cytokines both in the serum and in inflamed joints of CIA mice. Further, its therapeutic potential is comparable to that of etanercept, a biological agent that block tumor necrosis factor (TNF)-α. Importantly, the systemic cytotoxicity of TC-MTX was not detected. Thus, TC-MTX can be a new therapeutic modality for RA patients without systemic complications.
|Number of pages||10|
|Publication status||Published - 2012 Feb|
Bibliographical noteFunding Information:
This work was supported in part by Creative Research Initiatives , a National Research Foundation of Korea Grant funded by the Korean Government ( 2010-0000733 ) and the Brain Korea 21 (BK21) Program to Sang-Kyou Lee, and the Health & Medical Technology R&D Program by Ministry of Health and Welfare of the Korean Government ( 2004-A040158 ) to Soo-Kon Lee. The authors declare no competing financial interests.
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Mechanics of Materials