Nlrp6-dependent sentinel goblet cell functions dictate defensive responses during bacterial invasion of colonic crypts

Nlrp6-dependent sentinel goblet cells are required to preserve colonic crypt sterility during Citrobacter rodentium infection, and their loss increases crypt invasion and DSS colitis susceptibility.

• Why it matters: When the primary mucus barrier fails, secondary defenses that maintain crypt sterility are not well defined, including how microbe-sensing goblet cells coordinate localized protection.
• What they did: Using a GC-specific Nlrp6 knockout model (Nlrp6{Delta}GC), the study assessed DSS colitis and C. rodentium infection, then combined transcriptomic and immunological profiling with mucus secretion and goblet-cell maintenance readouts.
• The result: SenGC deficiency caused exacerbated inflammation, enhanced crypt invasion, diminished baseline mucus secretion, and accelerated goblet-cell loss; infection also failed to expand Nlrp6 GCs or restore MAMP-triggered mucus secretion in Nlrp6{Delta}GC tissue.

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