Geldanamycin is a benzoquinone ansamycin antibiotic that binds to Hsp90 (Heat Shock Protein 90) and alters its function. Geldanamycin induces the degradation of proteins that are mutated in tumor cells such as v-Src, Bcr-Abl and p53 preferentially over their normal cellular counterparts. This effect is mediated via HSP90. Despite its potent antitumor potential, geldanamycin presents several major drawbacks as a compound candidate (namely, hepatotoxicity) that have led to the development of geldanamycin analogues, in particular analogues containing a derivatisation at the 17 position:17-AAG,17-DMAG.
| Cell Experiment | |
|---|---|
| Cell lines | A2780 human ovarian cell line |
| Preparation method | Treating exponentially growing cells with Geldanamycin and assessing at various times DNA synthesis by incorporation of bromodeoxyuridine (BrdUrd) and flow cytometric analysis. No marked difference in total cell number is noted during this time course for treated and untreated cultures. BrdUrd (10 μM) is incorporated over a 4-h incubation period at 37 °C and cells are harvested and fixed in 70% ethanol. After denaturation of the DNA with 2 N HC1, incubating cells with an anti-BrdUrd mouse monoclonal antibody followed by a fluorescein isothiocyanate (FITC)-linked goat anti-mouse IgG. Staining cells for 30 minutes at room temperature with propidium iodide and analysing by flow cytometry using a Coulter EPICS Profile Analyzer. |
| Concentrations | 0.001-10 μM |
| Incubation time | 3 hours |
| Animal Experiment | |
|---|---|
| Animal models | FRE/erbB-2 tumors in nu/nu mice |
| Formulation | Geldana50 mg/kgmycin is dissolved in DMSO. |
| Dosages | 50 mg/kg |
| Administration | Administered via i.p. |
| Molecular Weight | 560.64 |
| Formula | C29H40N2O9 |
| CAS Number | 30562-34-6 |
| Solubility (25°C) | DMSO 39 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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