HSF1A - HSP Activator - 生命科學試劑 - MedChemExpress

1、Hotline: 400-820-3792Inhibitors Agonists Screening Librarieswww.MedChemEHSF1ACat. No.: HY-103000CAS No.: 1196723-93-9分式: CHNOS分量: 409.52作靶點: HSP作通路: Cell Cycle/DNA Damage; Metabolic Enzyme/Protease儲存式: Powder -20C 3 years4C 2 yearsIn solvent -80C 6 months-20C 1 month溶解性數(shù)據(jù)體外實驗 DMSO : 150 mg/mL (366.2

2、8 mM)H2O : 40% PEG300 5% Tween-80 45% salineSolubility: 2.5 mg/mL (6.10 mM); Clear solution2. 請依序添加每種溶劑： 10% DMSO 90% (20% SBE-CD in saline)Solubility: 2.5 mg/mL (6.10 mM); Suspended solution; Need ultrasonic1/3 Master of Small Molecules 您邊的抑制劑師www.MedChemE3. 請依序添加每種溶劑： 10% DMSO 90% corn oilSolubili

3、ty: 2.5 mg/mL (6.10 mM); Clear solutionBIOLOGICAL ACTIVITY物活性 HSF1A種可滲透細胞的熱休克轉(zhuǎn)錄因1 (HSF1) 活化劑。IC50 & Target HSF1體外研究 HSF1A protects cells from stress-induced apoptosis, binds TRiC subunits and inhibits TRiC activity withoutperturbation of ATP hydrolysis. Genetic inactivation or depletion of the TRiC

4、complex results in human HSF1activation and HSF1A inhibits the direct interaction between purified TRiC and HSF1 in vitro. Moreover,fluorescence anisotropy experiments using FITC coupled to HSF1A demonstrates that HSF1A-FITC binds toa purified Tcp1 subunit of TRiC with an affinity of approximately 6

5、00 nM. This is validated qualitatively viatitration of purified Tcp1 into binding reactions containing 500 nM Biotin or HSF1A-Biotin 1. Quantification bycounting the number of cell containing aggregates as a function of the total number of cells reveals that atHSF1A concentrations as low as 2 M, a r

6、educed number of aggregate-containing cells are observed. Thefraction of cells containing aggregates continued to decrease in a dose-dependent manner such thatpretreatment with 12 M HSF1A resulta in 20% of the cells exhibiting aggregates visible by fluorescencemicroscopy 2.體內(nèi)研究 HSF1A enhances HSF1 a

7、ctivity, stabilizes HSF1 expression and minimizes Doxorubicin (DOX)-inducedcardiac damage. WKY rats are challenged with DOX (accumulated dose: 30mg/kgw), and DOX combinedwith HSF1A (100mg/kgw/day). Supplementation with HSF1A significantly elevates cardiac functions back tothe levels of the control g

8、roup. HSF1A has been shown to stimulate human HSF1 nuclear translocation,elevate protein chaperone expression and ameliorate protein misfolding and cell death in aneurodegenerative disease model. The echocardiographic results show that HSF1A also alleviates DOX-induced failures in cardiac function 3

9、.PROTOCOLKinase Assay 1 Protein extracts are generated from mammalian, yeast and E. coli cultures using biotin-binding buffer (20 mMHEPES, 5 mM MgCl2, 1 mM EDTA, 100 mM KCl, 0.03% NP-40) supplemented with 1% Trition-X100 andprotease inhibitors. Approximately 0.5 mg of protein extract is incubated wi

10、th 100 M HSF1A-Biotin for 4 h at4C and HSF1A-Biotin associated proteins captured by with NeutrAvidin Agarose Resin. After washing inbiotin binding buffer proteins are eluted using 50 L biotin elution buffer (100 mM Tris, 150 mM NaCl, 0.1 mMEDTA, 2 mM D-biotin), resolved on a 4-20% SDS, and immunoblo

11、tted. For purified TRiC and Hsp70analyses, 5 nM protein is incubated in biotin-binding buffer+0.5% Triton X-100 with 100 M biotin or 100 MHSF1A-Biotin for 4 h at 4C and captured with NeutrAvidin Resin. For NiNTA purified yeast Tcp1, differentconcentrations of Tcp1 0.5 M, 1 mM, 2 mM, 3 mM and 4 mM in

12、 25 mM Hepes pH 7.5, 150 mM NaCl areincubated with 0.5 M Biotin or HSF1A-Biotin for 4 h at 4C and captured with NeutrAvidin Resin 1.MCE has not independently confirmed the accuracy of these methods. They are for reference only.2/3 Master of Small Molecules 您邊的抑制劑師www.MedChemECell Assay 2 PC12 cells

13、seeded into a 96-well plate (5104 cells/well) are treated with increasing concentrations ofHSF1A (2, 4, 8 and 12 M) for 15 h, at which time httQ74-GFP expression is stimulated by incubation in thepresence of 1 g/mL Doxycycline for 5 d. Cell viability is assessed via the XTT viability assay 2.MCE has

14、 not independently confirmed the accuracy of these methods. They are for reference only.Animal Rats 3Administration 3 Ten-week-old Wistar Kyoto rats (WKY) are used. The rats are housed at a constant temperature (22C) on a12-h light/dark cycle with food and tap water. The animals are arranged into th

15、ree groups: WKY rats (thecontrol group), DOX rats and DOX rats treated with HSF1A. Each group contain five animals. The DOXgroup is injected with DOX (5mg/kg) for 6 consecutive weeks intraperitoneal injection to achieve acumulative dose of 30mg/kg, which has been well documented to achieve cardiotox

16、icity. The small molecularHSF1 activator HSF1A (100mg/kg/day) is injected intraperitoneally.MCE has not independently confirmed the accuracy of these methods. They are for reference only.REFERENCES1. Neef DW, et al. A direct regulatory interaction between chaperonin TRiC and stress-responsive transc

17、ription factor HSF1. Cell Rep.2014 Nov 6;9(3):955-66.2. Neef DW, et al. Modulation of heat shock transcription factor 1 as a therapeutic target for small molecule intervention inneurodegenerative disease. PLoS Biol. 2010 Jan 19;8(1):e1000291.3. Huang CY, et al. Doxorubicin attenuates CHIP-guarded HSF1 nuclear translocation and protein stability to trigger IGF-IIR-dependent