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Related Experiment Videos

Activation of complement by trypanosomes.

K Nielsen, J Sheppard

    Experientia
    |June 15, 1977
    PubMed
    Summary
    This summary is machine-generated.

    Trypanosomes release factors that consume complement. Different species, like T. lewisi and T. congolense, exhibit varying abilities to activate bovine, human, and guinea pig complement systems.

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    Area of Science:

    • Parasitology
    • Immunology
    • Biochemistry

    Background:

    • Trypanosomes are protozoan parasites that cause significant diseases in humans and animals.
    • The complement system is a crucial part of the innate immune system, involved in host defense against pathogens.
    • Understanding parasite-host interactions, particularly immune evasion mechanisms, is vital for disease control.

    Purpose of the Study:

    • To describe factors released by trypanosomes with anti-complementary activity.
    • To investigate the complement-activating capabilities of these factors from different trypanosome species.
    • To discuss the potential role of these factors in trypanosome-induced pathology.

    Main Methods:

    • Incubation of trypanosomes at 20°C to release active factors.

    Related Experiment Videos

  • Assays to measure the consumption of the first component of bovine complement.
  • Complement activation assays using bovine, human, and guinea pig complement with factors from T. lewisi and T. congolense.

    • Main Results:

    • Factors released from trypanosomes exhibited anti-complementary activity by consuming the first component of bovine complement.
    • Factors from T. lewisi activated bovine, human, and guinea pig complement.
    • Factors from T. congolense activated bovine complement but showed limited activation of human and no activation of guinea pig complement.

    Conclusions:

    • Trypanosomes release factors that modulate the host complement system.
    • Species-specific differences exist in the complement-activating properties of these trypanosomal factors.
    • These findings suggest a role for complement-modulating factors in the pathogenesis of trypanosomiasis.