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. 2018 Feb 5;50(2):e439. doi: 10.1038/emm.2017.256

Figure 7.

Figure 7

ITIM-containing SIRPα is critical for SHP1 docking and interaction with Syk. (a) iBMM cells were transfected with Flag-CD11b, Flag-Syk, V5-Mincle, HA-Lyn or Flag-Shp1 for 24 h and then treated with TDM for 24 h before assessment by PLA assay. Interactions between endogenous SIRPα and the transfected proteins were visualized as fluorescent spots (red, PLA signal). Nuclei were stained with DAPI (blue). The number of PLA signals was determined for at least 50 cells for each condition. (b) Knockdown of SIRPα was confirmed by immunoblot (top panel). Culture media was collected after 24 h of TDM stimulation and subjected to ELISA for measurement of IL-6 and TNF-α production (bottom panel). (c) WT and SIRPα-deficient iBMMs were stimulated with TDM for the indicated times, and activation of Syk and Erk was determined by immunoblot. β-Actin protein expression was used as a loading control. Data are representative of two (c) or three (a, b) independent experiments. *P<0.05, ***P<0.0001 (two-tailed unpaired Student’s t-test).