C5aR1 is a master regulator in Colorectal Tumorigenesis via Immune modulation Theranostics, 2020 Jan 01

"The strong correlation between <t>complement</t> activation and CRC. ( A-D ) The associations between the mRNA levels of C3 (A), C5 (B), C5AR1 (C), and C5AR2 (D) and the overall survival of CRC patients (n=364). ( E, F ) The effect of C3 , C5 , C5ar1 or C5ar2 deficiency on AOM/DSS-induced colorectal tumorigenesis compared to WT control. Images of the colorectum, where CRC often developed at distal (rectum) sites (E), and quantitative analysis of tumor number and mass (F). The experiment was duplicated. Scale bar in (E), 1 cm. ( G ) Pathological analysis of control or tumor tissues, including H&E, Ki-67 and <t>C3d</t> staining. Scale bar, 100 µm for H&E and 50 µm for IHC. ( H ) C5a concentration in colon tissue homogenates (CTHs) measured by ELISA. n≥ 7 in each group of WT, C3 -KO, C5 -KO, C5ar1 -KO, or C5ar2 -KO mice. Data are represented as mean ± SEM; ns, not significant; * P <0.05; and *** P <0.001. NC, negative control. "