The novel anti-cell death compound MS41 and its cytoprotective mechanism

2000 ◽  
Vol 38 ◽  
pp. S51
Author(s):  
R Asakai
Keyword(s):  
Antioxidants ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 534
Author(s):  
Sucharat Tungsukruthai ◽  
Onrapak Reamtong ◽  
Sittiruk Roytrakul ◽  
Suchada Sukrong ◽  
Chanida Vinayanwattikun ◽  
...  

Autophagic cell death (ACD) is an alternative death mechanism in resistant malignant cancer cells. In this study, we demonstrated how polyphenol stilbene compound PE5 exhibits potent ACD-promoting activity in lung cancer cells that may offer an opportunity for novel cancer treatment. Cell death caused by PE5 was found to be concomitant with dramatic autophagy induction, as indicated by acidic vesicle staining, autophagosome, and the LC3 conversion. We further confirmed that the main death induction caused by PE5 was via ACD, since the co-treatment with an autophagy inhibitor could reverse PE5-mediated cell death. Furthermore, the defined mechanism of action and upstream regulatory signals were identified using proteomic analysis. Time-dependent proteomic analysis showed that PE5 affected 2142 and 1996 proteins after 12 and 24 h of treatment, respectively. The crosstalk network comprising 128 proteins that control apoptosis and 25 proteins involved in autophagy was identified. Protein–protein interaction analysis further indicated that the induction of ACD was via AKT/mTOR and Bcl-2 suppression. Western blot analysis confirmed that the active forms of AKT, mTOR, and Bcl-2 were decreased in PE5-treated cells. Taken together, we demonstrated the novel mechanism of PE5 in shifting autophagy toward cell death induction by targeting AKT/mTOR and Bcl-2 suppression.


1996 ◽  
Vol 316 (1) ◽  
pp. 25-28 ◽  
Author(s):  
Miriam J. SMYTH ◽  
David K. PERRY ◽  
Jiandi ZHANG ◽  
Guy G. POIRIER ◽  
Yusuf A. HANNUN ◽  
...  

The novel lipid second messenger, ceramide, specifically induced poly(ADP-ribose) polymerase cleavage through activation of the protease prICE. Over-expression of Bcl-2 inhibited ceramide-induced poly(ADP-ribose) polymerase proteolysis and protected cells from ceramide-induced death. These data provide the first insight into the mechanism by which ceramide mediates apoptosis and suggest a mechanism by which Bcl-2 protects from cell death.


Author(s):  
Yini Liu ◽  
Chunyan Duan ◽  
Rongyang Dai ◽  
Yi Zeng

Ferroptosis is a recently recognized form of non-apoptotic regulated cell death and usually driven by iron-dependent lipid peroxidation and has arisen to play a significant role in cancer biology. Distinct from other types of cell death in morphology, genetics, and biochemistry, ferroptosis is characterized by the accumulation of lipid peroxides and lethal reactive oxygen species controlled by integrated oxidant and antioxidant systems. Increasing evidence indicates that a variety of biological processes, including amino acid, iron, lactate, and lipid metabolism, as well as glutathione, phospholipids, NADPH, and coenzyme Q10 biosynthesis, are closely related to ferroptosis sensitivity. Abnormal ferroptotic response may modulate cancer progression by reprogramming the tumor microenvironment (TME). The TME is widely associated with tumor occurrence because it is the carrier of tumor cells, which interacts with surrounding cells through the circulatory and the lymphatic system, thus influencing the development and progression of cancer. Furthermore, the metabolism processes play roles in maintaining the homeostasis and evolution of the TME. Here, this review focuses on the ferroptosis-mediated crosstalk in the TME, as well as discussing the novel therapeutic strategies for cancer treatment.


2021 ◽  
Author(s):  
Moataz Dowaidar

It is possible to understand both the processes of ferroptosis and how this type of cell death will be harnessed in the near future. The novel ferroposis-based therapies will also be created and evaluated using various biomarkers. Selenium and vitamin E have been shown to support some types of cancer in several studies. Such environmental factors should be accounted for while exploring ferroaptosis's duties. The effect of these modifications will be dictated by the cellular and environmental context in which they are created. It is critical to determine whether the inhibitor can act as a lipophilic radical-trapping antioxidant and prevent ferroPTosis independently of the enzyme under investigation, as several studies with lipoxygenases have shown.Using pharmacological approaches to evaluate ferropsosis can have potential side effects that are difficult to measure. Using small-molecule probes may be investigated using small-molecules probes. It's essential to utilize a biochemical test or a pharmacodynamic marker of target inhibition when employing RSL3 to inhibit GPX4, or when using erastin to inhibit the system xc–cystine/glutamate antiporter, or by using an Xc–Cystine/Glutamate/Glutamic antiporter inhibitor, or an erast inhibitor, to inhibit Gpx4, GSH, and other types of protein thiols, such as GSH and protein thiola. Many tiny molecules that are potent and selective probes in cellular assays have limited applicability in animal studies. RSL3, a poor solubility, is useful only in instances when an injection is made directly into tissues or tumors. Interfering with iron to modulate ferroptosis has far-reaching ramifications. Findings obtained with iron chelators only should be interpreted with caution as depleting iron can have other side effects other than ferroPTosis suppression.


2020 ◽  
Vol 486 ◽  
pp. 46-57 ◽  
Author(s):  
Stephanie Laszig ◽  
Cathinka Boedicker ◽  
Tim Weiser ◽  
Stefan Knapp ◽  
Simone Fulda

2014 ◽  
Vol 1843 (6) ◽  
pp. 1162-1171 ◽  
Author(s):  
Kin Pong U ◽  
Venkataraman Subramanian ◽  
Antony P. Nicholas ◽  
Paul R. Thompson ◽  
Patrizia Ferretti

2018 ◽  
Vol 43 (5) ◽  
pp. e142-e144 ◽  
Author(s):  
Naghmehossadat Eshghi ◽  
Tamara F. Lundeen ◽  
Lea MacKinnon ◽  
Ryan Avery ◽  
Phillip H. Kuo

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