Wortmannin: Difference between revisions
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===PX-866=== |
===PX-866=== |
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One of these, [[PX-866]], has been shown to be a novel, potent, irreversible, inhibitor of PI-3 kinase with efficacy when delivered orally. [[PX-866]] was put in a phase 1 clinical trial by [http://www.oncothyreon.com/pipeline/small/px-866/overview.html Oncothyreon] company.<ref name=Howes2007>{{cite journal |last1=Howes |first1=AL |last2=Chiang |first2=GG |last3=Lang |first3=ES |last4=Ho |first4=CB |last5=Powis |first5=G |last6=Vuori |first6=K |last7=Abraham |first7=RT |title=The phosphatidylinositol 3-kinase inhibitor, PX-866, is a potent inhibitor of cancer cell motility and growth in three-dimensional cultures |journal=Molecular cancer therapeutics |volume=6 |issue=9 |pages=2505–14 |year=2007 |pmid=17766839 |doi=10.1158/1535-7163.MCT-06-0698}}</ref><ref name=Ph1-data2010>[http://www.tradingmarkets.com/news/stock-alert/onty_oncothyreon-presents-phase-1-data-for-px-866-and-px-478-at-asco-annual-meeting-973189.html PX-866 June 2010]</ref><ref name=NCT00726583>{{ClinicalTrialsGov|NCT00726583|Phase I Trial of Oral PX-866}}</ref> The clinical development plan for PX-866 includes both standalone and combination therapy in major human cancers.<ref>[http://www.lifesciencesworld.com/news/view/73683 Oncothyreon initiates Phase 1 trial of PX-866 cancer compound. 17/06/2008] lifesciencesworld news</ref> In 2010 PX-866 was starting 4 phase II trials for solid tumours.<ref>{{cite news |url=http://www.medicalnewstoday.com/articles/206625.php |title=ONTY Starts Four-Phase II Trial Program With Its Oral PI3K Inhibitor |date=4 Nov 2010 }}</ref><ref>http://www.drugrehab.in/2011/01/onty-starts-second-phase-iii-trial-of-pi3k-inhibitor-this-one-is-a-combo-with-merck-kgaas-erbitux/</ref> |
One of these, [[PX-866]], has been shown to be a novel, potent, irreversible, inhibitor of PI-3 kinase with efficacy when delivered orally. [[PX-866]] was put in a phase 1 clinical trial by [http://www.oncothyreon.com/pipeline/small/px-866/overview.html Oncothyreon] company.<ref name=Howes2007>{{cite journal |last1=Howes |first1=AL |last2=Chiang |first2=GG |last3=Lang |first3=ES |last4=Ho |first4=CB |last5=Powis |first5=G |last6=Vuori |first6=K |last7=Abraham |first7=RT |title=The phosphatidylinositol 3-kinase inhibitor, PX-866, is a potent inhibitor of cancer cell motility and growth in three-dimensional cultures |journal=Molecular cancer therapeutics |volume=6 |issue=9 |pages=2505–14 |year=2007 |pmid=17766839 |doi=10.1158/1535-7163.MCT-06-0698}}</ref><ref name=Ph1-data2010>[http://www.tradingmarkets.com/news/stock-alert/onty_oncothyreon-presents-phase-1-data-for-px-866-and-px-478-at-asco-annual-meeting-973189.html PX-866 June 2010]</ref><ref name=NCT00726583>{{ClinicalTrialsGov|NCT00726583|Phase I Trial of Oral PX-866}}</ref> The clinical development plan for PX-866 includes both standalone and combination therapy in major human cancers.<ref>[http://www.lifesciencesworld.com/news/view/73683 Oncothyreon initiates Phase 1 trial of PX-866 cancer compound. 17/06/2008] lifesciencesworld news</ref> In 2010 PX-866 was starting 4 phase II trials for solid tumours.<ref>{{cite news |url=http://www.medicalnewstoday.com/articles/206625.php |title=ONTY Starts Four-Phase II Trial Program With Its Oral PI3K Inhibitor |date=4 Nov 2010 }}</ref><ref>http://www.drugrehab.in/2011/01/onty-starts-second-phase-iii-trial-of-pi3k-inhibitor-this-one-is-a-combo-with-merck-kgaas-erbitux/</ref> |
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== References == |
== References == |
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Revision as of 04:13, 30 December 2015
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| Identifiers | |
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3D model (JSmol)
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| ChEMBL | |
| ChemSpider | |
| ECHA InfoCard | 100.112.065 |
PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| C23H24O8 | |
| Molar mass | 428.43186 g/mol |
| Melting point | 238 to 242 °C (460 to 468 °F; 511 to 515 K) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Wortmannin, a steroid metabolite of the fungi Penicillium funiculosum, Talaromyces wortmannii,[1] is a non-specific, covalent inhibitor of phosphoinositide 3-kinases (PI3Ks). It has an in vitro inhibitory concentration (IC50) of around 5 nM, making it a more potent inhibitor than LY294002, another commonly used PI3K inhibitor. It displays a similar potency in vitro for the class I, II, and III PI3K members although it can also inhibit other PI3K-related enzymes such as mTOR, DNA-PKcs, some phosphatidylinositol 4-kinases, myosin light chain kinase (MLCK) and mitogen-activated protein kinase (MAPK) at high concentrations [2],[3] Wortmannin has also been reported to inhibit members of the polo-like kinase family with IC50 in the same range as for PI3K.[4] The half-life of wortmannin in tissue culture is about 10 minutes due to the presence of the highly reactive C20 carbon that is also responsible for its ability to covalently inactivate PI3K. Wortmannin is a commonly used cell biology reagent that has been used previously in research to inhibit DNA repair, receptor-mediated endocytosis and cell proliferation.[citation needed]
Background: Phosphoinositide-3-kinase
Phosphoinositide-3-kinase (PI3K) activates an important cell survival signaling pathway, and constitutive activation is seen in ovarian, head and neck, urinary tract, cervical and small cell lung cancer. PI-3-K signaling is attenuated by the phosphatase activity of the tumor suppressor PTEN that is absent in a number of human cancers. Inhibiting PI-3-K presents the opportunity to inhibit a major cancer cell survival signaling pathway and to overcome the action of an important deleted tumor suppressor, providing antitumor activity and increased tumor sensitivity to a wide variety of drugs.
Wortmannin is a known and potent PI3K inhibitor; as such, it was shown to have detrimental influence on memory and impair spatial learning abilities.[5] [citation needed]
Derivates
In order to stabilize the Wortmannin molecule while not losing its therapeutic effect, numerous derivates were synthesized from Wortmannin[6]
PX-866
One of these, PX-866, has been shown to be a novel, potent, irreversible, inhibitor of PI-3 kinase with efficacy when delivered orally. PX-866 was put in a phase 1 clinical trial by Oncothyreon company.[7][8][9] The clinical development plan for PX-866 includes both standalone and combination therapy in major human cancers.[10] In 2010 PX-866 was starting 4 phase II trials for solid tumours.[11][12]
 | This article needs to be updated. |
References
- ^ Source: www.fermentek.co.il/wortmannin.htm
- ^ Vanhaesebroeck B et al., (2001) Synthesis and function of 3-phosphorylated inositol lipids. Annu Rev Biochem.
- ^ Ferby I et al., 1996. Adv Exp Med Biol. PAF-induced MAPK activation is inhibited by wortmannin in neutrophils and macrophages.
- ^ Liu Y et al., 2007. J. Biol Chem 282(4): 2505-11 Polo-like Kinases Inhibited by Wortmannin: Labeling Site and Downstream Effects
- ^ Molecular Psychiatry (2003) 8, 217–224; Phosphatidylinositol 3-kinase: a molecule mediating BDNF-dependent spatial memory formation M Mizuno
- ^ The discovery of PX-866: Molecular pharmacology and antitumor activity of PX-866, a novel inhibitor of phosphoinositide-3-kinase signaling, Nathan T. Ihle et al., Mol Cancer Ther. 2004;3:763-772
- ^ Howes, AL; Chiang, GG; Lang, ES; Ho, CB; Powis, G; Vuori, K; Abraham, RT (2007). "The phosphatidylinositol 3-kinase inhibitor, PX-866, is a potent inhibitor of cancer cell motility and growth in three-dimensional cultures". Molecular cancer therapeutics. 6 (9): 2505–14. doi:10.1158/1535-7163.MCT-06-0698. PMID 17766839.
- ^ PX-866 June 2010
- ^ Clinical trial number NCT00726583 for "Phase I Trial of Oral PX-866" at ClinicalTrials.gov
- ^ Oncothyreon initiates Phase 1 trial of PX-866 cancer compound. 17/06/2008 lifesciencesworld news
- ^ "ONTY Starts Four-Phase II Trial Program With Its Oral PI3K Inhibitor". 4 Nov 2010.
- ^ http://www.drugrehab.in/2011/01/onty-starts-second-phase-iii-trial-of-pi3k-inhibitor-this-one-is-a-combo-with-merck-kgaas-erbitux/
External links
Vendors' product pages