Ex vivo assays of dendritic cell activation and cytokine profiles as predictors of in vivo effects in an anti-human CD40 monoclonal antibody ChiLob 7/4 phase I trial.

ABSTRACT: Immunostimulatory antibodies entering the clinic create challenge in terms of not only pharmacodynamics for monitoring anticipated mechanisms but also predetermining cytotoxicity. We show the use of ex vivo whole-blood samples to predict the activation requirements, cytokine signature, and adverse events of an anti-human-CD40 chimeric IgG1 antibody, ChiLob 7/4. Assessments were initially undertaken on human myeloid (mDC1) and plasmacytoid (pDC) dendritic cells, in which an absolute need for cross-linking was shown through the upregulation of activation markers CD83 and CCR7. Subsequent cytokine secretion evaluations of ex vivo whole blood showed the cross-linked antibody-induced increases in MIP1β, interleukin (IL)-8, IL-12, TNFα, and IL-6. This cytokine signature compared favorably with t

SUBMITTER: Chowdhury F 

PROVIDER: S-EPMC4007630 | biostudies-literature | 2014 Mar

REPOSITORIES: biostudies-literature