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Related Experiment Videos

Teicoplanin-dependent antibodies: detection and characterization.

Stephen F Garner1, Kate Campbell, Graham Smith

  • 1National Blood Service, Cambridge, UK. sfg21@cam.ac.uk

British Journal of Haematology
|April 9, 2005
PubMed
Summary

Teicoplanin, an antibiotic, can cause thrombocytopenia (low platelets) by triggering specific antibodies. These antibodies target the GPIIb/IIIa complex on platelets, explaining this adverse drug reaction.

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Area of Science:

  • Immunology
  • Pharmacology
  • Hematology

Background:

  • Teicoplanin is a glycopeptide antibiotic effective against Gram-positive bacteria.
  • Thrombocytopenia is a rare but reported side effect of teicoplanin therapy.
  • The exact mechanism underlying teicoplanin-induced thrombocytopenia remains unclear.

Purpose of the Study:

  • To investigate the incidence and mechanism of thrombocytopenia in patients treated with teicoplanin.
  • To identify potential platelet-reactive antibodies associated with teicoplanin administration.
  • To determine the specific platelet antigens targeted by these antibodies.

Main Methods:

  • Studied 39 patients receiving teicoplanin, categorizing them by platelet count.
  • Assayed for teicoplanin-dependent, platelet-reactive IgG antibodies using glycoprotein capture ELISA and flow cytometry.

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  • Utilized GPIIb/IIIa transfected cells and GP-deficient platelets to identify target antigens.

    • Main Results:

    • 31 out of 39 patients (79%) developed thrombocytopenia.
    • IgG teicoplanin-dependent platelet-reactive antibodies were detected in 45% of thrombocytopenic patients and 25% of non-thrombocytopenic patients.
    • The GPIIb/IIIa complex was identified as a primary target antigen for these antibodies.

    Conclusions:

    • Teicoplanin-induced thrombocytopenia is associated with the development of specific IgG antibodies.
    • These antibodies target the GPIIb/IIIa complex on platelets.
    • The findings elucidate a key mechanism of this adverse drug reaction, aiding in diagnosis and management.