Objective and design
The objective of this study was to assess the effect of vamorolone, a first-in-class dissociative steroidal compound, to inhibit inflammation when administered after disease onset in the murine collagen antibody-induced arthritis model of arthritis.
84 DBA1/J mice were used in this study (n = 12 per treatment group).
Vamorolone or prednisolone was administered orally after disease onset for a duration of 7 days.
Disease score and bone erosion were assessed using previously described scoring systems. Cytokines were measured in joints via immunoassay, and joint cathepsin B activity (marker of inflammation) was assessed using optical imaging of joints on live mice.
We found that vamorolone treatment led to a reduction of several disease parameters including disease score, joint inflammation, and the presence of pro-inflammatory mediators to a degree similar of that observed with prednisolone treatment. More importantly, histopathological analysis of affected joints showed that vamorolone treatment significantly reduced the degree of bone erosion while this bone-sparing property was not observed with prednisolone treatment at any of the tested doses.
While many intervention regimens in other studies are administered prior to disease onset in animal models, the current study involves delivery of the potential therapeutic after disease onset. Based on the findings, vamorolone may offer an efficacious, yet safer alternative to conventional steroidal compounds in the treatment of rheumatoid arthritis and other inflammatory diseases.
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Collagen antibody-induced arthritis
Disease-modifying anti-rheumatic drugs
Glucocorticoid response elements
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Supported by a small business technology transfer (STTR) Grant from the National Institutes of Health (1R41AR068816-01). This award supported all experiments described in this manuscript.
Conflict of interest
:JMD, MRC, RL, and KN are employed by ReveraGen BioPharma Inc. JMD has ReveraGen BioPharma Inc. stock options, and KN has ReveraGen BioPharma Inc. founder shares. AAF has a consulting agreement with ReveraGen BioPharma Inc.
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Damsker, J.M., Cornish, M.R., Kanneboyina, P. et al. Vamorolone, a dissociative steroidal compound, reduces collagen antibody-induced joint damage and inflammation when administered after disease onset. Inflamm. Res. 68, 969–980 (2019). https://doi.org/10.1007/s00011-019-01279-z
- Rheumatoid arthritis