Toxicological and pharmacological assessment of AGEN1884, a novel human IgG1 anti-CTLA-4 antibody. Academic Article uri icon

Overview

abstract

  • CTLA-4 and CD28 exemplify a co-inhibitory and co-stimulatory signaling axis that dynamically sculpts the interaction of antigen-specific T cells with antigen-presenting cells. Anti-CTLA-4 antibodies enhance tumor-specific immunity through a variety of mechanisms including: blockade of CD80 or CD86 binding to CTLA-4, repressing regulatory T cell function and selective elimination of intratumoral regulatory T cells via an Fcγ receptor-dependent mechanism. AGEN1884 is a novel IgG1 antibody targeting CTLA-4. It potently enhanced antigen-specific T cell responsiveness that could be potentiated in combination with other immunomodulatory antibodies. AGEN1884 was well-tolerated in non-human primates and enhanced vaccine-mediated antigen-specific immunity. AGEN1884 combined effectively with PD-1 blockade to elicit a T cell proliferative response in the periphery. Interestingly, an IgG2 variant of AGEN1884 revealed distinct functional differences that may have implications for optimal dosing regimens in patients. Taken together, the pharmacological properties of AGEN1884 support its clinical investigation as a single therapeutic and combination agent.

publication date

  • April 4, 2018

Research

keywords

  • Adjuvants, Immunologic
  • Antineoplastic Agents, Immunological
  • CTLA-4 Antigen
  • Immunoglobulin G
  • Neoplasms

Identity

PubMed Central ID

  • PMC5884502

Scopus Document Identifier

  • 85045009778

Digital Object Identifier (DOI)

  • 10.3389/fimmu.2015.00418

PubMed ID

  • 29617360

Additional Document Info

volume

  • 13

issue

  • 4