Microbial Priming Reprograms TLR7 Signalosome Assembly for Trained Immunity

June 5, 2026Open Access

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Key Points

This research aims to explore how microbial components influence TLR7 signalosome assembly and trained immunity in innate immune responses.
Examined the effects of lipopolysaccharide on TLR4 activation and subsequent TLR7 signaling in macrophages.
Analyzed the role of Type-I interferon in modulating these signaling pathways.
Investigated the assembly of MyD88 signalosomes at endosomal membranes.
Activation of TLR4 by LPS enhances sensitivity of TLR7 signaling, increasing pro-inflammatory cytokine production.
Demonstrated increase in MyD88 signalosome assembly at endosomal membranes, indicating compartment-specific reprogramming.
Results suggest a novel regulatory mechanism in the innate immune system affecting receptor signaling pathways.

This dissertation reveals how microbial components modify TLR7 signaling in macrophages, suggesting implications for immunity and tolerance.

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Anna Brigitte Dingfelder (2026) studied this question.

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