کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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3065076 | 1580461 | 2009 | 9 صفحه PDF | دانلود رایگان |

Humanization and modification of the Fc region of anti-human CD3 mAbs have greatly expanded their potential use in chronic T cell mediated diseases. However, low levels of cytokine release and immunogenicity may still impact a chronic dosing strategy. We investigated the use of an Fc-modified murine chimeric anti-mouse CD3 (N297A) in the chronic MOG35–55-induced EAE mouse model of MS. Two daily doses of 10 μg at the onset of clinical symptoms led to both a reduction in T cell numbers in the blood and a significant, prolonged reduction in the symptoms. Histological examination of the spinal cords at the peak of efficacy confirmed a reduction of infiltrating T cells in the CNS.Analysis of the cerebral spinal fluid from EAE mice showed biologically active levels of N297A. Analysis of the cytokine/chemokine levels in cerebrospinal fluid showed a decrease in GM-CSF, IL-6 and IP-10. The combination of N297A dosing with cyclosporine A (CSA) pretreatment showed a significant decrease of TNFα, IL-6 and IP-10 without effect on clinical efficacy. However, pretreatment of CSA significantly reduced the immunogenic response observed following a second course of N297A treatment. Therefore, the side effects of an Fc-modified anti-CD3 mAb may be modulated without affecting efficacy.
Journal: Journal of Neuroimmunology - Volume 212, Issues 1–2, 25 July 2009, Pages 65–73