Frequent injections of high‑dose human umbilical cord mesenchymal stem cells slightly aggravate arthritis and skeletal muscle cachexia in collagen‑induced arthritic mice

  • Authors:
    • Lemei An
    • Tianshu Chu
    • Liujun Wang
    • Songtao An
    • Yalong Li
    • Hongbo Hao
    • Zhuoli Zhang
    • Han Yue
  • View Affiliations

  • Published online on: September 7, 2021     https://doi.org/10.3892/etm.2021.10707
  • Article Number: 1272
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Abstract

A single injection of low‑dose human umbilical cord‑derived mesenchymal stem cells (UC‑MSCs) has been previously demonstrated to relieve synovitis and bone erosion in animal models of arthritis, but whether frequent injections of high‑dose UC‑MSCs relieve arthritis and inhibit loss of muscle mass has remained elusive. In the present study, DBA/1 mice were randomly divided into three groups: Normal (wild‑type mice; n=11), collagen‑induced arthritis (CIA; n=12) and CIA treated with UC‑MSCs (n=11; 5x106 UC‑MSCs per week for 3 weeks). Arthritis and skeletal muscle cachexia were evaluated until the end of the experiment on day 84. It was indicated that both the CIA and UC‑MSC groups had lower body weights compared with the normal mice. Clinical arthritis scores, hind ankle diameters, synovitis and bone erosion progressively increased and were similar between the CIA and UC‑MSC groups. Although there was no difference in food intake among the three groups, the normalized food intake of normal group was significantly higher than CIA group and UC‑MSC group from day 42 onwards; there was no significance on day 77 but this could be neglected. Furthermore, gastrocnemius muscle weight in the UC‑MSC group was significantly reduced compared with that in the CIA and normal groups. The UC‑MSC group had higher levels of proinflammatory cytokines, such as TNF‑α, IL‑6 and IL‑1β than those in the CIA group. However, the other cytokines assessed and the fibrosis indices in the CIA and UC‑MSC groups were not different from those in the control group and there was no inflammatory cell infiltration. Thus, frequent injections of high‑dose UC‑MSCs slightly aggravated synovitis and muscle cachexia in the murine CIA model and should therefore be avoided in the treatment of arthritis.
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November-2021
Volume 22 Issue 5

Print ISSN: 1792-0981
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Spandidos Publications style
An L, Chu T, Wang L, An S, Li Y, Hao H, Zhang Z and Yue H: Frequent injections of high‑dose human umbilical cord mesenchymal stem cells slightly aggravate arthritis and skeletal muscle cachexia in collagen‑induced arthritic mice. Exp Ther Med 22: 1272, 2021
APA
An, L., Chu, T., Wang, L., An, S., Li, Y., Hao, H. ... Yue, H. (2021). Frequent injections of high‑dose human umbilical cord mesenchymal stem cells slightly aggravate arthritis and skeletal muscle cachexia in collagen‑induced arthritic mice. Experimental and Therapeutic Medicine, 22, 1272. https://doi.org/10.3892/etm.2021.10707
MLA
An, L., Chu, T., Wang, L., An, S., Li, Y., Hao, H., Zhang, Z., Yue, H."Frequent injections of high‑dose human umbilical cord mesenchymal stem cells slightly aggravate arthritis and skeletal muscle cachexia in collagen‑induced arthritic mice". Experimental and Therapeutic Medicine 22.5 (2021): 1272.
Chicago
An, L., Chu, T., Wang, L., An, S., Li, Y., Hao, H., Zhang, Z., Yue, H."Frequent injections of high‑dose human umbilical cord mesenchymal stem cells slightly aggravate arthritis and skeletal muscle cachexia in collagen‑induced arthritic mice". Experimental and Therapeutic Medicine 22, no. 5 (2021): 1272. https://doi.org/10.3892/etm.2021.10707