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Development and Characterization of a Preclinical Model for the Evaluation of CD205-Mediated Antigen Delivery Therapeutics in Type 1 Diabetes. | LitMetric

AI Article Synopsis

Article Abstract

Dendritic cells (DCs) are crucial for the production of adaptive immune responses to disease-causing microbes. However, in the steady state (i.e., in the absence of an infection or when Ags are experimentally delivered without a DC-activating adjuvant), DCs present Ags to T cells in a tolerogenic manner and are important for the establishment of peripheral tolerance. Delivery of islet Ags to DCs using Ag-linked Abs to the DC endocytic receptor CD205 has shown promise in the NOD mouse model of type 1 diabetes (T1D). It is important to note, however, that all myeloid DCs express CD205 in humans, whereas in mice, only one of the classical DC subsets does (classical DC1; CD8α in spleen). Thus, the evaluation of CD205-targeted treatments in mice will likely not accurately predict the results observed in humans. To overcome this challenge, we have developed and characterized a novel NOD mouse model in which all myeloid DCs transgenically express human CD205 (hCD205). This NOD.hCD205 strain displays a similar T1D incidence profile to standard NOD mice. The presence of the transgene does not alter DC development, phenotype, or function. Importantly, the DCs are able to process and present Ags delivered via hCD205. Because Ags taken up via hCD205 can be presented on both class I and class II MHC, both CD4 and CD8 T cells can be modulated. As both T cell subsets are important for T1D pathogenesis, NOD.hCD205 mice represent a unique, patient-relevant tool for the development and optimization of DC-directed T1D therapies.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6668927PMC
http://dx.doi.org/10.4049/immunohorizons.1900014DOI Listing

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