POM 1 is a polyoxometalate that inhibits ecto-nucleoside triphosphate diphosphohydrolase (NTPDase) 1 and 3 with Ki values of 2.58 and 3.26 µM, respectively.{33011} It demonstrates 10-fold lower inhibitory activity for NTPDase 2 (Ki = 28.8 µM) and does not inhibit P2Y12 receptors (Ki > 10 µM).{33011} Inhibition of ecto-NTPDases that are capable of hydrolyzing nucleoside tri- and diphosphates (i.e., ATP, ADP, UTP, or UDP) can result in a potentiation of purinergic signaling due to an increase in the extracellular nucleotide concentrations. This subtype-selective NTPase inhibitor has been used to investigate the mechanisms of purinergic signaling.{33012}
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An inhibitor of NTPDase 1 and 3 (Kis = 2.58 and 3.26 µM, respectively) that can be used to investigate the mechanisms of purinergic signaling
Formal name: tungstate (W12(OH)2O386-), hexasodium salt, monohydrate
Synonyms: Sodium Metatungstate|Sodium Polyoxotungstate
Molecular weight: 2,986.10
CAS: 314075-43-9
Purity: ≥95%
Formulation: A crystalline solid
Product Type|Biochemicals|Small Molecule Inhibitors|Nucleic Acid Turnover/Signaling||Research Area
The tetracycline repressor (TetR) is a transcriptional regulator which normally binds tightly to its palindromic tetO operator DNA, blocking gene expression.{17508} Tet causes the repressor to dissociate from the DNA, allowing transcription to occur. A novel reverse TetR (revTetR) requires tetracycline as a co-repressor to bind tetO and block transcription.{17509,17510} Anhydrotetracycline (hydrochloride) is a powerful effector in both the tetracycline repressor (TetR) and reverse TetR (revTetR) systems, binding the Tet repressor 35-fold more strongly than Tet.{17508,17511} Moreover, anhydrotetracycline poorly binds the 30S ribosomal subunit, compared to Tet,{17512} so it does not act as a general inhibitor of translation and is a poor antibiotic. Perhaps related to this, the concentration of anhydrotetracycline that inhibits eukaryotic cell growth is more than a 1,000-fold above the dose that alters transcription through TetR.{17508}
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The nuclear factor-κB (NF-κB) regulates the expression of numerous genes involved in immunity and inflammation, cellular stress responses, growth, and apoptosis. Resveratrol, a polyphenolic trans-stilbene, is a known inhibitor of the activation of NF-κB and exhibits activity against a wide variety of cancer cells. CAY10512 is a substituted trans-stilbene analog of resveratrol that is 100-fold more potent as measured by antioxidant activity. The IC50 value for inhibition of TNFα-induced activation of NF-κB by CAY10512 is 0.15 µM compared to 20 µM by resveratrol.{14545}
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The PtdIn phosphates play an important role in the generation and transduction of intracellular signals.{8344,4096,14518} PtdIns-(3,4,5)-P3-biotin is an affinity probe which allows the PIP3 to be detected through an interaction with the biotin ligand. This design allows PtdIns-(3,4,5)-P3-biotin to serve as a general probe for any protein with a high affinity binding interaction with inositol-(3,4,5)-triphosphate phospholipids, such as phosphatidylinositol 3-kinase, PTEN, or PH-domain-containing proteins.
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Cyclin-dependent kinases (CDKs) are key regulators of cell cycle progression and are therefore promising targets for cancer therapy. (R)-Roscovitine is a potent inhibitor of Cdk2/cyclin E with an IC50 value of 0.1 µM.{14988} It also inhibits Cdk7/cyclin H, Cdk5/p35, and cell division cycle (cdc)/cyclin B with IC50 values of 0.49, 0.16, and 0.65 µM, respectively.{14987,14988,14991} (R)-Roscovitine inhibits the growth of rapidly proliferating cells with an average IC50 value of 15.2 µM against a panel of 19 human tumor cell lines.{14988} In murine models of polycystic kidney disease, (R)-roscovitine effectively inhibited disease progression at doses of 50-100 mg/kg.{14564}
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