| First Author | Khanfar E | Year | 2020 |
| Journal | Int J Mol Sci | Volume | 21 |
| Issue | 17 | PubMed ID | 32859051 |
| Mgi Jnum | J:304245 | Mgi Id | MGI:6694453 |
| Doi | 10.3390/ijms21176162 | Citation | Khanfar E, et al. (2020) Ameliorated Autoimmune Arthritis and Impaired B Cell Receptor-Mediated Ca(2+) Influx in Nkx2-3 Knock-out Mice. Int J Mol Sci 21(17):6162 |
| abstractText | B cells play a crucial role in the pathogenesis of rheumatoid arthritis. In Nkx2-3-deficient mice (Nkx2-3(-/-)) the spleen's histological structure is fundamentally changed; therefore, B cell homeostasis is seriously disturbed. Based on this, we were curious, whether autoimmune arthritis could be induced in Nkx2-3(-/-) mice and how B cell activation and function were affected. We induced arthritis with immunization of recombinant human proteoglycan aggrecan G1 domain in Nkx2-3(-/-) and control BALB/c mice. We followed the clinical picture, characterized the radiological changes, the immune response, and intracellular Ca(2+) signaling of B cells. Incidence of the autoimmune arthritis was lower, and the disease severity was milder in Nkx2-3(-/-) mice than in control BALB/c mice. The radiological changes were in line with the clinical picture. In Nkx2-3(-/-) mice, we measured decreased antigen-induced proliferation and cytokine production in spleen cell cultures; in the sera, we found less anti-CCP-IgG2a, IL-17 and IFNgamma, but more IL-1beta, IL-4 and IL-6. B cells isolated from the lymph nodes of Nkx2-3(-/-) mice showed decreased intracellular Ca(2+) signaling compared to those isolated from BALB/c mice. Our findings show that the transcription factor Nkx2-3 might regulate the development of autoimmune arthritis most likely through modifying B cell activation. |
