Rituximab Treatment Modulates the Release of Hydrogen Peroxide and the Production of Proinflammatory Cytokines by Monocyte at the Onset of Type 1 Diabetes

Author(s): Linda Hamouda, Maroua Miliani, Zeyneb Hadjidj, Rabia Messali, Mourad Aribi*

Journal Name: Endocrine, Metabolic & Immune Disorders - Drug Targets
Formerly Current Drug Targets - Immune, Endocrine & Metabolic Disorders

Volume 19 , Issue 5 , 2019

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Graphical Abstract:


Background: Monocytes are the main blood innate mononuclear phagocyte and one of the most important effector cells expressing Fcγ receptor, which is critical for the interaction with Fc domain of antibodies.

Objective: To evaluate the effect of Rituximab (RTX, a chimeric human anti-CD20 monoclonal antibody) on the functional activities of Monocytes (MOs) at the onset of human Type 1 Diabetes (T1D).

Methods: MOs were isolated from peripheral blood mononuclear cells (PBMCs) obtained from volunteer patients with recent-onset T1D and healthy control donors.

Results: The levels of the production of Interleukin 1β (IL-1β) and IL-6 were significantly increased in MOs from patients with T1D when compared to MOs from healthy controls (respectively, p < 0.01 and p < 0.05). Similarly, Interferon γ (IFN-γ), and intracellular free Calcium Ion (ifCa2+) levels were increased in T1D MOs than in control MOs, but the difference did not reach a significant level. Conversely, the production levels of IL-4 and catalase activity, as well as of both phagocytosis and killing capacities were decreased in MOs of T1D patients compared to MOs from healthy controls, but the difference was not significant for catalase activity and killing capacity (respectively, p < 0.01, p > 0.05, p < 0.01, and p > 0.05). Additionally, treatment with RTX significantly upregulated phagocytosis (p < 0.05), markedly downregulated the release of IL-1β (p < 0.01), ifCa2+, hydrogen peroxide (H2O2), and slightly downregulated the Nitric Oxide Synthase (NOS) activity, NOS activity-to-arginase activity ratio, the levels of Lactate Dehydrogenase (LDH)-based cytotoxicity, and the production of IL-6 and IFN-γ. Moreover, RTX treatment significantly upregulated the production of IL-4 (p < 0.05), IL-10 (p < 0.01) and the catalase activity (p < 0.05).

Conclusion: Our study has shown for the first time that RTX can reverse the abnormal functional activities of MOs as well as their production of proinflammatory cytokines at the onset of T1D. From a therapeutic point of view, RTX may potentially be suggested at the beginning of T1D to immunomodulate innate immunity and inflammatory conditions.

Keywords: Functional activities of monocyte, phagocytosis and killing capacities, proinflammatory and antiinflammatory/ regulatory cytokines, respiratory burst, rituximab, type 1 diabetes.

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Year: 2019
Page: [643 - 655]
Pages: 13
DOI: 10.2174/1871530319666190215153213
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