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Amelioration of autoimmunity and inflammation by zinc oxide nanoparticles in experimental rheumatoid arthritis

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Abstract

Rheumatoid arthritis (RA) is a chronic autoimmune disease that affects the lining of the synovial joints and approximately affects 0.5 − 1% of the total population imposing a socioeconomic burden. The current study aimed at investigating the novel possible beneficial effects of using zinc oxide nanoparticles (ZnO NPs) on such devastating disease. The complete Freund’s adjuvant (CFA) model was used to mimic RA in rats where ZnO NPs were given orally (2 mg/kg/day) daily for 14 days; and diclofenac Na, the standard drug, was given intraperitoneally (1 mg/kg/day) the day after CFA, daily for 14 days. Our results displayed that ZnO NPs attenuated adjuvant-induced increased production of inflammatory mediators interleukin-1β (IL-1β), tumor necrosis factor alpha (TNF-α), interleukin-10 (IL-10), and total leukocyte count. Besides, they ameliorated autoimmunity through suppression of anti-citrullinated protein auto antibodies (anti-CCP) levels in rats. In conclusion our results highlight the benefits which could be obtained of nanoparticles either alone or in combination with the known anti-arthritic and/or anti-inflammatory agents, giving rise to new protocols to maximize the control of RA.

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All data generated or analyzed during this study are included in this published article (and its supplementary information files).

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AMF and SS conceived and designed research. AMF and MA conducted the experiment. DA, SS and MA analyzed the data and wrote the manuscript. All authors read and approved the manuscript. The authors declare that all data were generated in-house and that no paper mill was used.

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Correspondence to Doaa Abou El-ezz.

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All experimental procedures adopted for in vivo studies were in accordance with the local ethics committee guidelines at Modern Sciences and Arts University (PH1/EC1/2020PD) that comply with the international laws for the care and use of laboratory animals.

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The authors declare that there is no conflict.

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Gad, S.S., Fayez, A.M., Abdelaziz, M. et al. Amelioration of autoimmunity and inflammation by zinc oxide nanoparticles in experimental rheumatoid arthritis. Naunyn-Schmiedeberg's Arch Pharmacol 394, 1975–1981 (2021). https://doi.org/10.1007/s00210-021-02105-2

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  • DOI: https://doi.org/10.1007/s00210-021-02105-2

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