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7-Epi 10-desacetyl paclitaxel is a taxol analog and impurity of paclitaxel (Taxol), which is a microtubule polymer stabilizer (tubulin inhibitor) and chemotherapeutic drug used for the treatment of a wide variety of cancers.
| Targets |
Tubulin
|
|---|---|
| ln Vitro |
Paclitaxel (taxol) is a potent anticancer drug that is used in the treatment of a wide variety of cancerous. In the present study, we identified a taxol derivative named 7-epi-10-deacetyltaxol (EDT) from the culture of an endophytic fungus Pestalotiopsis microspora isolated from the bark of Taxodium mucronatum. This study was carried out to investigate the effects of fungal EDT on cell proliferation, the induction of apoptosis and the molecular mechanisms of apoptosis in human hepatoma HepG2 cells in vitro.[1]
We demonstrate that the fungal EDT exhibited significant in vitro cytotoxicity in HepG2 cells. We investigated cytotoxicity mechanism of EDT in HepG2 cells. The results showed nuclear condensation and DNA fragmentation were observed in cells treated with fungal EDT. Besides, the fungal EDT arrested HepG2 cells at G2/M phase of cell cycle. Furthermore, fungal EDT induced apoptosis in HepG2 cells in a dose-dependent manner associated with ROS generation and increased Bax/Bcl-2 ratio, p38 MAPKs and PARP cleavage.[1] Conclusions: Our data show that EDT induced apoptotic cell death in HepG2 cells occurs through intrinsic pathway by generation of ROS mediated and activation of MAPK pathway. This is the first report for 7-epi-10-deacetyltaxol (EDT) isolated from a microbial source.[1] |
| Cell Assay |
The endophytic fungus was identified by traditional and molecular taxonomical characterization and the fungal EDT was purified using column chromatography and confirmed by various spectroscopic and chromatographic comparisons with authentic paclitaxel. We studied the in vitro effects of EDT on HepG2 cells for parameters such as cell cycle distribution, DNA fragmentation, reactive oxygen species (ROS) generation and nuclear morphology. Further, western blot analysis was used to evaluate Bcl-2-associated X protein (Bax), B-cell lymphoma 2 (Bcl-2), p38-mitogen activated protein kinase (MAPK) and poly [ADP-ribose] polymerase (PARP) expression[1].
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| References |
[1]. Fungal 7-epi-10-deacetyltaxol produced by an endophytic Pestalotiopsis microspora induces apoptosis in human hepatocellular carcinoma cell line (HepG2).
[2]. α-Glucosidase Inhibitory and Cytotoxic Taxane Diterpenoids from the Stem Bark of Taxus wallichiana. J Nat Prod. 2017 Apr 28;80(4):1087-1095. |
| Additional Infomation |
7-Epi-10-deacetyltaxol is a natural product found in Taxus cuspidata with data available.
From a CH2Cl2 extract of the bark of Taxus wallichiana, six new taxoids, wallitaxanes A–F (1–6), were isolated, together with 29 known compounds. The structures of the new compounds were elucidated on the basis of spectroscopic data interpretation. Wallitaxane D (4) was identified as an opened oxetane-type taxoid having the first naturally occurring C(H)-20 acetal group, while wallitaxanes E (5) and F (6) are representative of the rare abeo-taxoid class. The isolated compounds were evaluated for their α-glucosidase inhibitory activity and for cytotoxicity against the HeLa human cervical cancer cell line. In the present work, taxanes were found to exhibit α-glucosidase inhibitory activity for the first time, and wallitaxane A (1) showed the most potent effect, with an IC50 value of 3.6 μM. In turn, 7-epi-taxol (16) and 7-epi-10-deacetyltaxol (17) showed IC50 values of 0.05 and 0.085 nM, respectively, against HeLa cells.[2] |
| Molecular Formula |
C45H49NO13
|
|---|---|
| Molecular Weight |
811.8695
|
| Exact Mass |
811.32
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| Elemental Analysis |
C, 66.57; H, 6.08; N, 1.73; O, 25.62
|
| CAS # |
78454-17-8
|
| PubChem CID |
14355298
|
| Appearance |
Typically exists as White to yellow solids at room temperature
|
| Density |
1.41±0.1 g/cm3
|
| Boiling Point |
959.5℃ at 760 mmHg
|
| Melting Point |
163-170?C
|
| LogP |
3.74
|
| tPSA |
218.71
|
| SMILES |
O1C([H])([H])[C@@]2([C@@]1([H])C([H])([H])[C@]([H])([C@@]1(C([H])([H])[H])C([C@@]([H])(C3=C(C([H])([H])[H])[C@]([H])(C([H])([H])[C@](C3(C([H])([H])[H])C([H])([H])[H])([C@]([H])([C@]21[H])OC(C1C([H])=C([H])C([H])=C([H])C=1[H])=O)O[H])OC([C@@]([H])([C@]([H])(C1C([H])=C([H])C([H])=C([H])C=1[H])N([H])C(C1C([H])=C([H])C([H])=C([H])C=1[H])=O)O[H])=O)O[H])=O)O[H])OC(C([H])([H])[H])=O
|
| InChi Key |
TYLVGQKNNUHXIP-DIYBZAJCSA-N
|
| InChi Code |
InChI=1S/C45H49NO13/c1-24-29(57-41(54)35(50)33(26-15-9-6-10-16-26)46-39(52)27-17-11-7-12-18-27)22-45(55)38(58-40(53)28-19-13-8-14-20-28)36-43(5,37(51)34(49)32(24)42(45,3)4)30(48)21-31-44(36,23-56-31)59-25(2)47/h6-20,29-31,33-36,38,48-50,55H,21-23H2,1-5H3,(H,46,52)/t29-,30+,31+,33-,34+,35+,36-,38-,43+,44-,45+/m0/s1
|
| Chemical Name |
[(1S,2S,3R,4S,7R,9R,10S,12R,15S)-4-acetyloxy-15-[(2R,3S)-3-benzamido-2-hydroxy-3-phenylpropanoyl]oxy-1,9,12-trihydroxy-10,14,17,17-tetramethyl-11-oxo-6-oxatetracyclo[11.3.1.03,10.04,7]heptadec-13-en-2-yl] benzoate
|
| Synonyms |
10-Deacetyl-7-epitaxol; Ormosin VI; 7-Epi-10-deacetyltaxol; 78454-17-8; 7-Epi 10-Desacetyl Paclitaxel; 10-DEACETYL-7-EPIPACLITAXEL; 111149-94-1; PF8TD9Q8G5; 10-O-Deacetyl-7-epi-paclitaxel; 7-EPI-10-DEACETYL-TAXOL; 10-Deacetyl-7-epi-paclitaxel; 10-Deacetyl-7-epipaclitaxel; 10-Desacetyl-7-epi-taxol; 10-Desacetyl-7-epipaclitaxel; 7-epi-10-deacetyl Paclitaxel; 7-epi-10-Deacetyltaxol;
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| HS Tariff Code |
2934.99.9001
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| Storage |
Powder -20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month Note: This product requires protection from light (avoid light exposure) during transportation and storage. |
| Shipping Condition |
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
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| Solubility (In Vitro) |
DMSO : ~100 mg/mL (~123.17 mM)
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|---|---|
| Solubility (In Vivo) |
Solubility in Formulation 1: ≥ 2.5 mg/mL (3.08 mM) (saturation unknown) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 400 μL PEG300 and mix evenly; then add 50 μL Tween-80 to the above solution and mix evenly; then add 450 μL normal saline to adjust the volume to 1 mL. Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution. Solubility in Formulation 2: ≥ 2.5 mg/mL (3.08 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of corn oil and mix evenly. (Please use freshly prepared in vivo formulations for optimal results.) |
| Preparing Stock Solutions | 1 mg | 5 mg | 10 mg | |
| 1 mM | 1.2317 mL | 6.1586 mL | 12.3172 mL | |
| 5 mM | 0.2463 mL | 1.2317 mL | 2.4634 mL | |
| 10 mM | 0.1232 mL | 0.6159 mL | 1.2317 mL |
*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.
Calculation results
Working concentration： mg/mL；
Method for preparing DMSO stock solution： mg drug pre-dissolved in μL DMSO (stock solution concentration mg/mL). Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.
Method for preparing in vivo formulation:：Take μL DMSO stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O，mix and clarify.
(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
(2) Be sure to add the solvent(s) in order.
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