Related Experiment Videos
Mycoplasma host-cell interactions resulting in chronic inflammation: acquisition of host antigens and other
Abstract:
Many pathogenic mycoplasmas induce chronic inflammation as a consequence of their ability of circumvent or block immunological attack. This may be due to the organisms's intrinsic properties or to factors that arise from mycoplasma host-cell interactions. Based upon present evidence, the most likely mechanisms are antibody and/or phagocyte inefficiency, alteration of lymphocyte responsiveness due to the nonspecific mitogenicity of mycoplasmas, and antigenic disguise via acquisition of host antigens. The latter is not only an important mechanism by which the organisms could evade or alter the host immunological response, but one which may serve as a stimulus for autoimmune reactions.
Insights
Pathogenic mycoplasmas cause chronic inflammation by evading immune responses. Key mechanisms include antibody inefficiency, altered lymphocyte function, and antigenic disguise, potentially triggering autoimmune reactions.
Area of Science:
- Microbiology
- Immunology
- Pathogenesis
Background:
- Pathogenic mycoplasmas are known to cause chronic inflammation.
- Their ability to circumvent or block immunological attack contributes to persistent infections.
Purpose of the Study:
- To elucidate the mechanisms by which pathogenic mycoplasmas evade host immune responses.
- To understand the role of mycoplasma-host interactions in immune evasion and chronic inflammation.
Main Methods:
- Review of existing evidence on mycoplasma-host interactions and immune evasion strategies.
- Analysis of proposed mechanisms including antibody and phagocyte inefficiency, lymphocyte alteration, and antigenic disguise.
Main Results:
- Antibody and/or phagocyte inefficiency are likely contributors to immune evasion.
- Nonspecific mitogenicity of mycoplasmas alters lymphocyte responsiveness.
- Antigenic disguise through acquisition of host antigens is a significant evasion strategy.
Conclusions:
- Pathogenic mycoplasmas employ multiple strategies to evade host immunity, leading to chronic inflammation.
- Antigenic disguise may also initiate autoimmune reactions, highlighting a dual role in pathogenesis.