scholarly journals Differences and Similarities in TRAIL- and Tumor Necrosis Factor-Mediated Necroptotic Signaling in Cancer Cells

2016 ◽  
Vol 36 (20) ◽  
pp. 2626-2644 ◽  
Author(s):  
Justyna Sosna ◽  
Stephan Philipp ◽  
Johaiber Fuchslocher Chico ◽  
Carina Saggau ◽  
Jürgen Fritsch ◽  
...  

Recently, a type of regulated necrosis (RN) called necroptosis was identified to be involved in many pathophysiological processes and emerged as an alternative method to eliminate cancer cells. However, only a few studies have elucidated components of TRAIL-mediated necroptosis useful for anticancer therapy. Therefore, we have compared this type of cell death to tumor necrosis factor (TNF)-mediated necroptosis and found similar signaling through acid and neutral sphingomyelinases, the mitochondrial serine protease HtrA2/Omi, Atg5, and vacuolar H+-ATPase. Notably, executive mechanisms of both TRAIL- and TNF-mediated necroptosis are independent of poly(ADP-ribose) polymerase 1 (PARP-1), and depletion of p38α increases the levels of both types of cell death. Moreover, we found differences in signaling between TNF- and TRAIL-mediated necroptosis, e.g., a lack of involvement of ubiquitin carboxyl hydrolase L1 (UCH-L1) and Atg16L1 in executive mechanisms of TRAIL-mediated necroptosis. Furthermore, we discovered indications of an altered involvement of mitochondrial components, since overexpression of the mitochondrial protein Bcl-2 protected Jurkat cells from TRAIL- and TNF-mediated necroptosis, and overexpression of Bcl-XL diminished only TRAIL-induced necroptosis in Colo357 cells. Furthermore, TRAIL does not require receptor internalization and endosome-lysosome acidification to mediate necroptosis. Taken together, pathways described for TRAIL-mediated necroptosis and differences from those for TNF-mediated necroptosis might be unique targets to increase or modify necroptotic signaling and eliminate tumor cells more specifically in future anticancer approaches.

Author(s):  
Fabian Wohlfromm ◽  
Max Richter ◽  
Lado Otrin ◽  
Kamil Seyrek ◽  
Tanja Vidaković-Koch ◽  
...  

A recombinant fragment of human κ-Casein, termed RL2, induces cell death of breast cancer cells; however, molecular mechanisms of RL2-mediated cell death have remained largely unknown. In the current study, we have decoded the molecular mechanism of the RL2-mediated cell death and found that RL2 acts via the induction of mitophagy. This was monitored by the loss of adenosine triphosphate production, LC3B-II generation, and upregulation of BNIP3 and BNIP3L/NIX, as well as phosphatase and tensin homolog-induced kinase 1. Moreover, we have analyzed the cross talk of this pathway with tumor necrosis factor-related apoptosis-inducing ligand (TRAIL)-induced apoptosis upon combinatorial treatment with RL2 and TRAIL. Strikingly, we found two opposite effects of this co-treatment. RL2 had inhibitory effects on TRAIL-induced cell death upon short-term co-stimulation. In particular, RL2 treatment blocked TRAIL-mediated caspase activation, cell viability loss, and apoptosis, which was mediated via the downregulation of the core proapoptotic regulators. Contrary to short-term co-treatment, upon long-term co-stimulation, RL2 sensitized the cells toward TRAIL-induced cell death; the latter observation provides the basis for the development of therapeutic approaches in breast cancer cells. Collectively, our findings have important implications for cancer therapy and reveal the molecular switches of the cross talk between RL2-induced mitophagy and TRAIL-mediated apoptosis.


Oncotarget ◽  
2017 ◽  
Vol 8 (16) ◽  
pp. 26941-26958 ◽  
Author(s):  
Minghui Chen ◽  
Fangfang Cai ◽  
Daolong Zha ◽  
Xueshi Wang ◽  
Wenjing Zhang ◽  
...  

2019 ◽  
Vol 19 (15) ◽  
pp. 1835-1845
Author(s):  
Ali Hassanzadeh ◽  
Adel Naimi ◽  
Majid F. Hagh ◽  
Raedeh Saraei ◽  
Faroogh Marofi ◽  
...  

Introduction: Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL or Apo2L) is a member of the tumor necrosis factor (TNF) superfamily, which stimulates apoptosis in a wide range of cancer cells via binding to death receptors 4 and 5 (DR4/5). Nevertheless, TRAIL has noticeable anti-cancer abilities; some cancer cells acquire resistance to TRAIL, and consequently its potential for inducing apoptosis in target cells is strongly diminished. Acute lymphoblastic leukemia MOLT-4 cell line is one of the most resistant cells to TRAIL that developed resistance to TRAIL via different pathways. We used TRAIL plus kaempferol to eliminate resistance of the MOLT-4 cells to TRAIL. Material and Methods: First, IC50 for kaempferol (95 µM) was determined by using the MTT assay. Second, the viability of the MOLT-4 cells was assayed by FACS after Annexin V/PI staining, following treatment with TRAIL (50 and 100 nM) and kaempferol (95 µM) alone and together. Finally, the expression levels of the candidate genes involved in resistance to TRAIL were assayed by real-time PCR technique. Results: Kaempferol plus TRAIL induced apoptosis robustly in MOLT-4 cells at 12, 24 and 48 hours after treatment. Additionally, we found that kaempferol could inhibit expression of the c-FLIP, X-IAP, cIAP1/2, FGF-8 and VEGF-beta, and conversely augment expression of the DR4/5 in MOLT-4 cells. Conclusion: We suggest that co-treatment of MOLT-4 cells with TRAIL plus kaempferol is a practical and attractive approach to eliminate cancers’ resistance to TRAIL via inhibition of the intracellular anti-apoptotic proteins, upregulation of DR4/5 and also by suppression of the VEGF-beta (VEGFB) and FGF-8 expressions.


1997 ◽  
Vol 272 (48) ◽  
pp. 30167-30177 ◽  
Author(s):  
José A. Sánchez-Alcázar ◽  
Jesús Ruı́z-Cabello ◽  
Inmaculada Hernández-Muñoz ◽  
Pilar Sánchez Pobre ◽  
Paz de la Torre ◽  
...  

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