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Generating specific, robust protective responses to different bacteria is vital for animal survival. Here, we address the role of transforming growth factor β (TGF-β) member DBL-1 in regulating signature host defense responses in Caenorhabditis elegans to human opportunistic Gram-negative and Gram-positive pathogens. Canonical DBL-1 signaling is required to suppress avoidance behavior in response to Gram-negative, but not Gram-positive bacteria. We propose that in the absence of DBL-1, animals perceive some bacteria as more harmful. Animals activate DBL-1 pathway activity in response to Gram-negative bacteria and strongly repress it in response to select Gram-positive bacteria, demonstrating bacteria-responsive regulation of DBL-1 signaling. DBL-1 signaling differentially regulates expression of target innate immunity genes depending on the bacterial exposure. These findings highlight a central role for TGF-β in tailoring a suite of bacteria-specific host defenses.
Pubmed ID: 37750680
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View all literature mentionsCenter that acquires, maintains, and distributes genetic stocks and information about stocks of the small free-living nematode Caenorhabditis elegans for use by investigators initiating or continuing research on this genetic model organism. A searchable strain database, general information about C. elegans, and links to key Web sites of use to scientists, including WormBase, WormAtlas, and WormBook are available.
View all literature mentionsCaenorhabditis elegans with name sma-4(e729) III. from WB.
View all literature mentionsCaenorhabditis elegans with name sma-3(e491) III. from WB.
View all literature mentionsEscherichia coli with name E. coli. from WB.
View all literature mentionsCaenorhabditis elegans with name sma-4(jj278) III. from WB.
View all literature mentionsCaenorhabditis elegans with name pha-1(e2123) III; denEx21. from WB.
View all literature mentionsCaenorhabditis elegans with name unc-119(ed3) III; eEx650. from WB.
View all literature mentionsCaenorhabditis elegans with name pha-1(e2123) III; denEx17. from WB.
View all literature mentionsCaenorhabditis elegans with name dbl-1(nk3) V. from WB.
View all literature mentionsCaenorhabditis elegans with name sma-2(e502) III. from WB.
View all literature mentionsCaenorhabditis elegans with name jjIs2277. from WB.
View all literature mentionsCaenorhabditis elegans with name pha-1(e2123) III; denEx26. from WB.
View all literature mentionsCaenorhabditis elegans with name agIs6. from WB.
View all literature mentionsCaenorhabditis elegans with name Caenorhabditis elegans wild isolate. from WB.
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