Theileria parasites subvert E2F signaling to stimulate leukocyte proliferation
Intracellular pathogens have evolved intricate mechanisms to subvert host cell signaling pathways and ensure their own propagation. A lineage of the protozoan parasite genus Theileria infects bovine leukocytes and induces their uncontrolled proliferation causing a leukemia-like disease. Given the importance of E2F transcription factors in mammalian cell cycle regulation, we investigated the role of E2F signaling in Theileria-induced host cell proliferation. Using comparative genomics and surface plasmon resonance, we identified parasite-derived peptides that have the sequence-specific ability to increase E2F signaling by binding E2F negative regulator Retinoblastoma-1 (RB). Using these peptides as a tool to probe host E2F signaling, we show that the disruption of RB complexes ex vivo leads to activation of E2F-driven transcription and increased leukocyte proliferation in an infection-dependent manner. This result is consistent with existing models and, together, they support a critical role of E2F signaling for Theileria-induced host cell proliferation, and its potential direct manipulation by one or more parasite proteins.
Main Authors: | , , , , , , , , , , , , , , |
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Format: | Journal Article biblioteca |
Language: | English |
Published: |
Springer
2020-03-04
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Subjects: | theileria, cattle, animal diseases, vaccines, disease control, east coast fever, |
Online Access: | https://hdl.handle.net/10568/108093 https://doi.org/10.1038/s41598-020-60939-x |
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