20(S)-Protopanaxatriol is an active aglycone metabolite of various panaxatriol ginsenosides, including ginsenoside Re (Item No. 15330), ginsenoside Rf (Item No. 23667), ginsenoside Rg1 (Item No. 15315), ginsenoside Rg2 (Item No. 15331), and ginsenoside Rh1 (Item No. 27318).{24878} It is cytotoxic to HL-60 cancer cells (IC50 = 16 µM).{53453} 20(S)-Protopanaxatriol inhibits the proliferation of human umbilical vein endothelial cells (HUVECs; EC50 = 6.64 µg/ml).{53454} It inhibits LPS-induced increases in the protein levels of COX-2 and inducible nitric oxide synthase (iNOS) and decreases LPS-induced NF-κB activity in RAW 264.7 cells when used at concentrations ranging from 1 to 20 µM.{53455}
Available on backorder
An active ginsenoside metabolite; cytotoxic to HL-60 cancer cells (IC50 = 16 µM); inhibits the proliferation of HUVECs (EC50 = 6.64 µg/ml); blocks LPS-induced increases in the protein levels of COX-2 and iNOS and decreases LPS-induced NF-κB activity in RAW 264.7 cells from 1-20 µM
Formal name: (3β,6α,12β)-dammar-24-ene-3,6,12,20-tetrol
Synonyms: 20(S)-APPT|PPT
Molecular weight: 476.7
CAS: 34080-08-5
Purity: ≥95%
Formulation: A crystalline solid
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}
Available on backorder
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}
Available on backorder
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}
Available on backorder
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}
Available on backorder