What is the role of antithymocyte globulin in immunosuppression after pediatric transplantation?

Updated: Oct 18, 2019
  • Author: Randy P Prescilla, MD; Chief Editor: Mary C Mancini, MD, PhD, MMM  more...
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Antithymocyte globulin

Polyclonal antithymocyte globulin (Atgam, Thymoglobulin) is prepared from the serum of rabbits immunized with human thymocytes. Antithymocyte globulin contains cytotoxic antibodies that bind to CD2, CD3, CD4, CD8, CD11a, CD18, CD25, CD44, CD45 and HLA class I and II molecules on the surface of human T lymphocytes. The antibodies deplete circulating lymphocytes by direct cytotoxicity (both complement and cell-mediated) and block lymphocyte function by binding to cell surface molecules involved in the regulation of cell function.

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