Autoimmunity in Chronic Chagas Disease: A Road of Multiple Pathways to Cardiomyopathy?

Area of Science:

• Immunology
• Infectious Diseases
• Cardiology

Background:

• Chagas disease (CD) is a neglected tropical disease caused by Trypanosoma cruzi, affecting millions globally and posing a significant public health challenge.
• Chronic infection establishes, leading to chronic Chagas cardiomyopathy (CCC) due to parasite evasion of the host immune system.
• T. cruzi persistence generates immune stimuli, causing tissue damage and inflammation, potentially involving autoimmune mechanisms.

Purpose of the Study:

• To review recent findings and hypotheses on autoimmune mechanisms in the development and progression of chronic Chagas cardiomyopathy (CCC).

Main Methods:

• This review synthesizes current literature and research hypotheses regarding the autoimmune aspects of Chagas disease progression.
• Analysis of studies investigating Trypanosoma cruzi evasion strategies and their interaction with the host immune system.
• Examination of evidence for molecular mimicry and its role in generating autoimmune responses in CD.

Main Results:

• Trypanosoma cruzi employs immune evasion strategies, allowing persistent infection and chronic inflammation.
• Molecular mimicry between parasite and host proteins may induce cross-reactivity, leading to autoimmune features like autoantibodies.
• Evidence suggests a role for autoimmunity in the clinical progression of chronic Chagas cardiomyopathy, although mechanisms remain under investigation.

Conclusions:

• Autoimmune responses, potentially triggered by parasite persistence and molecular mimicry, are implicated in the pathogenesis of chronic Chagas cardiomyopathy.
• Further research is needed to elucidate the precise mechanisms driving autoimmunity in human Chagas disease progression.
• Understanding these autoimmune pathways is crucial for developing targeted therapies for chronic Chagas cardiomyopathy.