NVP-BEP800 (VER-82576) is an ATP-competitive HSP90β inhibitor. Heat shock protein 90 (Hsp90) is a ubiquitously expressed molecular chaperone with ATPase activity involved in the conformational maturation and stability of key signaling molecules involved in cell proliferation, survival, and transformation. NVP-BEP800 (VER-82576) showed activity against a panel of human tumor cell lines and primary human xenografts in vitro at nanomolar concentrations. In A375 melanoma and BT-474 breast cancer cell lines, NVP-BEP800 induced client protein degradation (including ErbB2, B-Raf(V600E), Raf-1, and Akt) and Hsp70 induction. Oral administration of NVP-BEP800 was well tolerated and induced robust antitumor responses in tumor xenograft models, including regression in the BT-474 breast cancer model. In these tumor models, NVP-BEP800 modulated Hsp90 client proteins and downstream signaling pathways at doses causing antitumor activity. NVP-BEP800 (VER-82576) showed in vivo activity in a variety of dosing regimens covering daily to weekly schedules, potentially providing a high degree of flexibility in dose and schedule within the clinical setting. NVP-BEP800 can radiosensitise tumour cell lines of different entities through destabilisation and depletion of several Hsp90 client proteins, thus causing the depletion of S phase and G2/M arrest, increased DNA damage and repair protraction and, to some extent, apoptosis.
| Cell Experiment | |
|---|---|
| Cell lines | BT-474, SKBr3, MCF-7, MDA-MB-157, MDA-MB-231, MDA-MB-468 and BT20 cells line |
| Preparation method | Cell proliferation was determined using either sulforhodamine B for adherent cells or MTS assay for suspension cells or those showing low adherence. GI50 was the compound concentration that inhibits cell growth by 50% compared with vehicle control. |
| Concentrations | 0~1 μ M |
| Incubation time | 24 h |
| Animal Experiment | |
|---|---|
| Animal models | T-474 tumor xenografts in nude mice |
| Formulation | 0.5% methyl cellulose |
| Dosages | 30 mg/kg qd for 2 weeks |
| Administration | PO. |
| Molecular Weight | 480.41 |
| Formula | C21H23Cl2N5O2S |
| CAS Number | 847559-80-2 |
| Solubility (25°C) | Ethanol 96 mg/mL |
| Storage |
Powder -20°C 3 years ; 4°C 2 years In solvent -80°C 6 months ; -20°C 1 month |
| Species | Mouse | Rat | Rabbit | Guinea pig | Hamster | Dog |
| Weight (kg) | 0.02 | 0.15 | 1.8 | 0.4 | 0.08 | 10 |
| Body Surface Area (m2) | 0.007 | 0.025 | 0.15 | 0.05 | 0.02 | 0.5 |
| Km factor | 3 | 6 | 12 | 8 | 5 | 20 |
| Animal A (mg/kg) = Animal B (mg/kg) multiplied by | Animal B Km |
| Animal A Km |
For example, to modify the dose of Compound A used for a mouse (20 mg/kg) to a dose based on the BSA for a rat, multiply 20 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for Compound A of 10 mg/kg.
| Related HSP Products |
|---|
| Hsp70-derived octapeptide
Hsp70-derived octapeptide is a conserved octapeptide of the C-terminal end of Hsp70, which physically interacts with tetratricopeptide repeat (TPR) motifs. |
| p5 Ligand for Dnak and DnaJ
p5 Ligand for Dnak and DnaJ is a nonapeptide, which corresponds to the main binding site for the 23-residue part of the presequence of mitochondrial aspartate aminotransferase. |
| Tertomotide hydrochloride
Tertomotide hydrochloride is a peptide consisting of 16 amino acids containing sequences derived from human telomerase reverse transcriptase (TERT).Tertomotide penetrates cells and interacts with HSP70 and HSP90, as well as inhibiting amyloid beta and tau, and inhibiting aging-related signaling in the brain. pathways, which could be used in aging and Alzheimer's disease related studies. |
| BMS-986263
BMS-986263 is a small interfering RNA (siRNA) that targets Hsp47 and can be used in studies related to idiopathic pulmonary fibrosis (IPF). |
| AT-533
AT-533 is a potent Hsp90 and HSV inhibitor. |
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