Chemical construction of immunotoxins

V. Ghetie, E. S. Vitetta

Research output: Contribution to journalArticlepeer-review

37 Scopus citations


Immunotoxins are chimeric proteins consisting of an antibody linked to a toxin. The antibodies most frequently used for the preparation of immunotoxins are murine monoclonal antibodies belonging to IgG isotype. The most used toxins for the chemical construction of immunotoxins are Ricin toxin A chain in its deglycosylated form and recombinant Pseudomonas endotoxin with the cell-binding domain deleted. The linkage of the antibody to the toxin can be accomplished by chemical methods using reagents that crosslink antibody to toxin. The usual crosslinkers attach disulfide groups into the antibody molecule to form a disulfide bond between the antibody and the toxin. Disulfide bonds are susceptible to reduction in the cytoplasm of the targeted cells thereby releasing the toxin so that it can exert its cytotoxic activity only into the cells (e.g., tumor cells) binding the antibody moiety. This article describes various methods to obtain antibodies and toxins and several procedures for their crosslinking as well as "in vitro" and "in vivo" testing of the immunotoxins efficacy.

Original languageEnglish (US)
Pages (from-to)251-268
Number of pages18
JournalApplied Biochemistry and Biotechnology - Part B Molecular Biotechnology
Issue number3
StatePublished - Aug 11 2001


  • Antibody
  • Chemical crosslinkers
  • Immunotoxins
  • Toxin
  • Tumor cells

ASJC Scopus subject areas

  • Biotechnology
  • Bioengineering
  • Biochemistry
  • Applied Microbiology and Biotechnology
  • Molecular Biology


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