Death receptor 5 is activated by fucosylation in colon cancer cells. (14th January 2019)

• Record Type: Journal Article
• Authors: Zhang, Baojie; van Roosmalen, Ingrid A. M.; Reis, Carlos R.; Setroikromo, Rita; Quax, Wim J.
• Is Part Of: FEBS journal. Volume 286:Number 3(2019)
• Page Start: 555
• Page End: 571
• Publication Date: 2019-01-14
• Subjects: death receptor 5 -- fucosylation -- glycosylation -- receptor clustering -- TNF‐related apoptosis‐inducing ligand; Biochemistry -- Periodicals; Molecular biology -- Periodicals; Pathology, Molecular -- Periodicals; 572
• DOI: 10.1111/febs.14742
• Languages: English
• ISSNs: 1742-464X

Abstract

Abstract : The remarkable pro‐apoptotic properties of tumour necrosis factor (TNF)‐related apoptosis‐inducing ligand (TRAIL) have led to considerable interest in this protein as a potential anticancer therapeutic. However, TRAIL is largely ineffective in inducing apoptosis in certain cancer cells, and the mechanisms underlying this selectivity are unknown. In colon adenocarcinomas, posttranslational modifications including O ‐ and N‐ glycosylation of death receptors were found to correlate with TRAIL‐induced apoptosis. Additionally, mRNA levels of fucosyltransferase 3 (FUT3) and 6 (FUT6) were found to be high in the TRAIL‐sensitive colon adenocarcinoma cell line COLO 205. In this study, we use agonistic receptor‐specific TRAIL variants to dissect the contribution of FUT3 and FUT6‐mediated fucosylation to TRAIL‐induced apoptosis via its two death receptors, DR4 and DR5. Triggering of apoptosis by TRAIL revealed that the low FUT3/6‐expressing cells DLD‐1 and HCT 116 are insensitive to DR5 but not to DR4‐mediated apoptosis. By contrast, efficient apoptosis is mediated via both receptors in high FUT3/6‐expressing COLO 205 cells. The reconstitution of FUT3/6 expression in DR5‐resistant cells completely restored TRAIL sensitivity via this receptor, while only marginally enhancing apoptosis via DR4 at lower TRAIL concentrations. Interestingly, we observed that induction of the salvage pathway by external administration ofl ‐fucose restores DR5‐mediated apoptosis in both DLD‐1 and HCT 116 cells. Finally, we show that fucosylation influences the ligand‐independent receptor association that leads to increased death inducing signalling complex (DISC) formation and caspase‐8 activation. Taken together, these results provide evidence for the differential impact of fucosylation on signalling via DR4 or DR5. These findings provide novel opportunities to enhance TRAIL sensitivity in colon adenocarcinoma cells that are highly resistant to DR5‐mediated apoptosis. Abstract : Because of its ability to induce apoptosis in tumour cells, TRAIL [Tumour necrosis factor (TNF)‐related apoptosis‐inducing ligand] has sparked a lot of interest in oncology research. Posttranslational modifications and upregulation of fucosylation were previously found to correlate with TRAIL‐induced apoptosis. This study shows that fucosylation triggers the clustering of death receptors DR4 and DR5, leading to increased cell death. Moreover, apoptosis mediated by DR5 can be stimulated by simple external administration ofl ‐fucose.