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C-phycocyanin (C-PC), a type of functional food colourant, plays a significant role in regulating inflammatory responses. However, its underlying anti-inflammatory mechanism remains unknown. Previously, we have established a 35S in vivo/vitro labelling analysis for dynamic proteomic (SiLAD) technology. Unlike traditional proteomic methods, SiLAD exclusively detects synthesis rates instead of accumulated amounts through 35S pulse labelling of newly synthesized proteins, providing a high sensitive way for analysing protein alterations. In this work, we applied SiLAD to explore the anti-inflammatory mechanism of C-PC. We found that the protein synthesis rates were specifically detected and visualised. Strikingly, network analysis suggested programmed cell death 5 protein (PDCD5) was involved in C-PC mediated anti-inflammatory process. Phenotyping experiments demonstrated that C-PC could reduce inflammation through down-regulating PDCD5-NF-κB signaling. These results provided important information for the regulation of C-PC, and offered a novel perspective for regulatory mechanism of functional food.

e15514 Background: Stomach cancer is a major cause of cancer death in East Asia. The purpose of this study was to find a predictive marker to estimate the prognosis of stomach cancer. Methods: In this study, a total of 34 gastric cancer patients receiving therapy in Tianjin Nankai Hospital were enrolled. Genomic DNA was extracted from formalin-fixed, paraffin-embedded tissue sections, including carcinoma and pericarcinous tissues. Targeted regions of 549 cancer-associated genes were amplified by PCR, barcoded and sequenced using an Illumina Next-Seq 500 platform. Results: 25/34 patients had tumor metastasis. 135 non-silent mutations in 62 genes were detected in 27 tumor samples, while 7 patients’ samples had no mutation detected. CDH1, BRCA2 and SMAD4 gene mutations only occurred among metastasis patients. CDH1, BRCA2 and KRAS gene mutations are associated with a lower overall survival rate. Among them, 5 patients had a CDH1 mutation, including one splicing mutation, three frameshift mutations, one non-frameshift mutation and two non-synonymous mutations. All five patients had tumor metastasis, with the survival time less than 17 months, compared with all patients’ average overall survival of 22 month. Conclusions: Previous studies showed that mutation in CDH1 is linked to gastric cancer (GC) susceptibility and tumor invasion. Our results indicated that the mutation of CDH1 was also associated with the prognosis of gastric adenocarcinoma (P < .01) and was an independent factor (P < .05).