Description

The Clec7a Knockout RAW 264.7 Cell Line is a CRISPR/Cas9-edited knockout cell line targeting the Clec7a gene in the murine RAW 264.7 macrophage background. This model eliminates Dectin-1 expression, the primary innate receptor for ??-glucan polysaccharides, enabling precise study of C-type lectin receptor signaling and ??-glucan?Cindependent macrophage responses.

RAW 264.7 is a BALB/c-derived Abelson virus-transformed macrophage line retaining phagocytic, antigen presentation, and cytokine production functions. Its responsiveness to diverse microbial ligands makes it a standard platform for innate immunity and inflammation research.

Clec7a encodes Dectin-1, which recognizes fungal ??-glucans and triggers Syk kinase activation through its ITAM motif. This initiates the CARD9?CBCL10?CMALT1 (CBM) complex, leading to NF-??B and MAPK (ERK, JNK, p38) activation and transcription of pro-inflammatory cytokines such as TNF, IL-6, IL-23, and IL-1??. Dectin-1 signals cooperatively with TLR2 and interacts with Vav1, PLC??2, and PKC??. Clec7a knockout thus disrupts the primary Syk-dependent pathway for ??-glucan?Cinduced innate immunity.

Loss of Dectin-1 in macrophages abolishes ??-glucan?Ctriggered phagocytosis, cytokine release, and inflammasome activation. This provides a clean background to probe Syk-independent signaling, TLR crosstalk, and macrophage contribution to inflammatory diseases including colitis and colitis-associated cancer, where ??-glucan sensing modifies disease outcomes.

Research applications encompass studying antifungal immunity against Candida and Aspergillus, dissecting Syk?CCARD9 signaling, and screening for pathway modulators. Common assays include ??-glucan?Cinduced cytokine ELISA, phagocytosis measurement, western blot for phospho-Syk, NF-??B and MAPK activation profiling, RT-qPCR for cytokine transcripts, and flow cytometry to confirm Dectin-1 ablation. For further details or custom services, please contact Ascent Research.