There are many forms of cell death, most of which can be triggered by a variety of stimuli and physiological conditions. The often compared are apoptosis and necrosis. Apoptosis has become the focus of research area due to its complex nature and the different roles of maintaining healthy and self-sustaining biological entities. On the other hand, necrosis is a form of cell damage against acute external injury and trauma, leading to passive cell death and causing an inflammatory response. 
The BCl-2 family has been identified as its important role in apoptosis. The BH domain promotes interaction of family members with one another and may be indicative of pro-apoptotic or anti-apoptotic functions. Usually the BCL-2 family have been classified into one of three subfamilies; anti-apoptosis, BH3 only (pro-apoptotic) and pro-apoptotic proteins. The great promise for cancer therapy has been shown in recent research about BCL-2 targeting.
In the cell cycle, apoptosis acts as a fail-safe measure to prevent fidelity and proliferation quality. Although a certain degree of genetic variation is allowed and evolution is promoted, regenerative cells with extensive genetic errors and cell damage are subject to apoptosis. P53 is the Key role in the cell cycle system which initiate the apoptosis in certain cell types. P53 is a widely studied tumor suppressor. The p53 tumor suppressor gene is most frequently mutated in cancer cells (mutation occurs in more than 50% of human cancers) , which makes the restriction mechanism ineffective. Tumorigenesis is likely to commence when the p53-based preventive system loses its function completely.
Expression of stimuli, such as DNA damage, hypoxia and activation of certain oncoproteins (eg, Myc, Ras) are dependent on the apoptotic pathway of p53 . The transactivation function of p53 plays an important role in inducing apoptosis, the pro-apoptotic proteins, Bax and lgF-Bp3, are transcriptional targets of p53. As a well-known tumor suppressor, p53 is recognized for its ability to initiate apoptosis in the cell cycle and its ability to induce cell arrest and DNA repair in regenerative cells. In addition to p53, there are many other cell cycle regulators that can affect apoptosis (eg, pRb, p21).
Many studies have emphasized the importance of apoptosis in the self-defense mechanism or immune system. The immune system is responsible for rendering the host resistant to a variety of external pathogens. Apoptosis is an integral part of the immune system and helps maintain the homeostasis of the immune system. Secondly, the immune system relies on apoptosis to eliminate unwanted functional maturation of T cells and B cells . Finally, apoptosis confers cytotoxicity to certain cell types (ie, cytotoxic T lymphocytes and natural killer cells). A well-coordinated disruption protocol allows these cells to destroy target cells while the target cells remain intact. Cytotoxic T lymphocytes (CTLs) can induce target cell death in two ways, one of which involves perforin and granzymes.
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ABT-263 also called Navitoclax is a potent and orally bioavailable Bcl-2 family inhibitor (Ki's of <1 nmol/L for Bcl-2, Bcl-xL, and Bcl-w).ABT-263 maintains a high affinity for Bcl-xL, Bcl-2, and Bcl-w, (Ki ≤1 nmol/L), but binds more weakly to Mcl-1 and A1.
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Jaceosidin is a pharmacologically active flavone derived from Artemisia argyi, inhibits phorbol-ester-induced upregulation of COX-2 and MMP-9 by blocking phosphorylation of ERK-1 and -2 in cultured human mammary epithelial cells. Learn More
A-385358 is an inhibitor of Bcl-XL that enhances the in vitro cytotoxic activity of numerous chemotherapeutic agents (paclitaxel, etoposide, cisplatin, and doxorubicin) in several tumor cell lines. Learn More
Chi-Hung R. Or, .et al. Obatoclax, a Pan-BCL-2 Inhibitor, Targets Cyclin D1 for Degradation to Induce Antiproliferation in Human Colorectal Carcinoma Cells, Int J Mol Sci, 2016, Jan; 18(1): 44 PMID: 28035994
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A-1155463 is a highly potent and selective BCL-XL inhibitor, A-1155463 shows picomolar binding affinity to BCL-XL (Ki = <0.01 nM), and >1000-fold weaker binding to BCL-2 (Ki = 80 nM) and related proteins BCL-W (Ki = 19 nM) and MCL-1 (Ki > 440 nM) Learn More
(+)-Apogossypol is a potent inhibitor of Bcl-2 family proteins; competing with the BH3 peptide-binding sites on Bcl-2, Bcl-XL, Mcl-1, Bcl-W, and Bcl-B, but not Bfl-1, with IC50s of 0.5 to 2 μM. Learn More
A-1210477 is a potent and selective MCL-1 inhibitor. A-1210477 induces the hallmarks of intrinsic apoptosis and demonstrates single agent killing of multiple myeloma and non-small cell lung cancer cell lines. Learn More
Bcl-2 Inhibitor contains a mixture of two tautomers. A potent, cell-permeable, Bcl-2 inhibitor competes with Bak BH3 peptide for binding to Bcl-2 and Bcl-XL in vitro (IC50 =10 uM and 7 uM, respectively). Learn More
Gambogic acid is a natural product isolated from the Garcinia hanburyi tree. Gambogic Acid activates caspases with EC50 of 0.78-1.64 μM and competitively inhibits Bcl-XL, Bcl-2, Bcl-W, Bcl-B, Bfl-1 and Mcl-1 with IC50 of 1.47, 1.21, 2.02, 0.66, 1.06 and 0.79 μM, respectively. Learn More
Bax inhibitor peptide P5, cell-permeable synthetic peptide inhibitor of Bax translocation to mitochondria; designed from Ku70, a protein that is suggested to suppress the mitochondrial translocation of Bax. Inhibits Bax-mediated apoptosis in vitro. Learn More
Bax inhibitor peptide V5, cell-permeable synthetic peptide inhibitor of Bax translocation to mitochondria; designed from Ku70, a protein that is suggested to suppress the mitochondrial translocation of Bax. Inhibits Bax-mediated apoptosis in vitro. Learn More
Bax inhibitor peptide, negative control, negative control peptide for the Bax inhibitor peptides V5 and P5 , which inhibit Bax translocation to mitochondria and Bax-mediated apoptosis in vitro. Learn More
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Q-VD-OPH is a selective, brain and cell permeable, highly potent and irreversible inhibitor of caspase-3 ( IC50=25nm), caspase-1 (IC50=50nM), caspase-8 (IC50=100nM) and caspase-9 (IC50=430nM). Learn More
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What volume of a given 10 mM stock solution is required to make 20ml of a 50 μM solution?
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