Docetaxel, a potent antimicrotubule agent widely used in the treatment of ovarian, breast and lung cancer, is extensively metabolized in various animal species, including humans. The metabolism of docetaxel to its primary metabolite, hydroxydocetaxel, is mediated by cytochrome P450 isozymes CYP3A2 and CYP3A4 in rats and humans, respectively....
In vitro drug interaction studies revealed that docetaxel is metabolized by the CYP3A4 isoenzyme, and its metabolism may be modified by the concomitant administration of compounds that induce, inhibit, or are metabolized by cytochrome P450 3A4.
来源:Hazardous Substances Data Bank (HSDB)
代谢
多西他赛已知的人类代谢物包括羟基多西他赛。
Docetaxel has known human metabolites that include Hydroxy-Docetaxel.
Hepatic. In vitro drug interaction studies revealed that docetaxel is metabolized by the CYP3A4 isoenzyme (1 major, 3 minor metabolites).
Route of Elimination: Docetaxel was eliminated in both the urine and feces following oxidative metabolism of the tert-butyl ester group, but fecal excretion was the main elimination route. Within 7 days, urinary and fecal excretion accounted for approximately 6% and 75% of the administered radioactivity, respectively.
Half Life: Dose-dependent. Doses of 70 mg per square meter of body surface area (mg/m 2 ) or higher produce a triphasic elimination profile. With lower doses, assay limitations precluded detection of the terminal elimination phase. The half-life of the alpha, beta, and gamma phase are 4 minutes, 36 minutes, and 11.1 hours, respectively.
IDENTIFICATION AND USE: Docetaxel is a white to almost white powder formulated into a solution for intravenous infusion. Docetaxel, an antineoplastic agent indicated for the treatment of patients with locally advanced or metastatic breast cancer after failure of prior chemotherapy or in combination with doxorubicin and cyclophosphamide, is indicated for the adjuvant treatment of patients with operable node-positive breast cancer. Docetaxel is also used in combination with prednisone as indicated for the treatment of patients with androgen independent (hormone refractory) metastatic prostate cancer. It is used in combination with cisplatin and fluorouracil. Finally, docetaxel in combination with cisplatin and fluorouracil is indicated for the treatment of patients with advanced gastric adenocarcinoma, including adenocarcinoma of the gastroesophageal junction, who have not received prior chemotherapy for advanced disease and for the induction treatment of patients with locally advanced squamous cell carcinoma of the head and neck (SCCHN). HUMAN EXPOSURE AND TOXICITY: Based on its mechanism of action and findings in animals, docetaxel can cause fetal harm when administered to a pregnant woman. Women of childbearing potential should be advised to avoid becoming pregnant during therapy with docetaxel. The incidence of treatment-related mortality associated with docetaxel therapy is increased in patients with abnormal liver function, in patients receiving higher doses, and in patients with non-small cell lung carcinoma and a history of prior treatment with platinum-based chemotherapy who receive Taxotere as a single agent at a dose of 100 mg/sq m. Fatal GI hemorrhage associated with thrombocytopenia has been reported in patients receiving docetaxel for locally advanced or metastatic breast cancer. Hepatitis, sometimes fatal, has been reported rarely in patients receiving docetaxel. Fatal hepatitis occurred mainly in patients with pre-existing liver disorders. Abnormalities in liver function test results have occurred in patients receiving docetaxel. Cases of acute myeloid leukemia (AML) and myelodysplastic syndrome (MDS) have been reported in association with Taxotere when used in combination with other chemotherapy agents and/or radiotherapy. Disseminated intravascular coagulation (DIC), often in association with sepsis, or multiorgan failure, has been reported. Severe hypersensitivity reactions characterized by generalized rash/erythema, hypotension and/or bronchospasm, or very rarely fatal anaphylaxis, have been reported in patients premedicated with 3 days of corticosteroids. Patients with elevations of bilirubin or abnormalities of transaminase concurrent with alkaline phosphatase are at increased risk for the development of grade 4 neutropenia, febrile neutropenia, infections, severe thrombocytopenia, severe stomatitis, severe skin toxicity, and toxic death. ANIMAL STUDIES: Reproduction studies in rats and rabbits given docetaxel doses greater than or equal to 0.3 and 0.03 mg/kg (about 1/50 and 1/300 the maximum daily recommended human dose on a mg/sq m basis), respectively, during organogenesis revealed evidence of maternal toxicity, embryotoxicity, and fetotoxicity; fetotoxicity was characterized by intrauterine mortality, increased resorption, reduced fetal weight, and fetal ossification delay. When administered in multiple IV doses of up to 0.3 mg/kg (about 1/50 of the recommended human dose on an mg/sq m basis), docetaxel produced no impairment of fertility in rats, but decreased testicular weights were reported. Docetaxel was clastogenic in the in vitro chromosome aberration test in CHO-K1 cells and in the in vivo micronucleus test in mice administered doses of 0.39 to 1.56 mg/kg (about 1/60th to 1/15th the recommended human dose on a mg/sq m basis). Docetaxel was not mutagenic in the Ames test or the CHO/HGPRT gene mutation assays.
Docetaxel interferes with the normal function of microtubule growth. Whereas drugs like colchicine cause the depolymerization of microtubules in vivo, docetaxel arrests their function by having the opposite effect; it hyper-stabilizes their structure. This destroys the cell's ability to use its cytoskeleton in a flexible manner. Specifically, docetaxel binds to the β-subunit of tubulin. Tubulin is the 'building block' of mictotubules, and the binding of docetaxel locks these building blocks in place. The resulting microtubule/docetaxel complex does not have the ability to disassemble. This adversely affects cell function because the shortening and lengthening of microtubules (termed dynamic instability) is necessary for their function as a transportation highway for the cell. Chromosomes, for example, rely upon this property of microtubules during mitosis. Further research has indicated that docetaxel induces programmed cell death (apoptosis) in cancer cells by binding to an apoptosis stopping protein called Bcl-2 (B-cell leukemia 2) and thus arresting its function.
Docetaxel has been associated with serum aminotransferase elevations in up to half of patients, but values greater than 5 times the upper limit of normal (ULN) occur in less than 2%. Similar rates of alkaline phosphatase elevations and occasional mild bilirubin elevations also occur. The abnormalities are usually asymptomatic, mild and self-limited, rarely requiring dose modification or discontinuation. Despite the frequency of serum enzyme elevations during therapy, clinically apparent liver injury from docetaxel is rare. Nevertheless, individual case reports of severe acute hepatic necrosis attributed to docetaxel have been published, usually arising within a few days or weeks after a severe hypersensitivity reaction to the first or second infusion of docetaxel (Case 1). The typical case arises within days of the infusion of docetaxel and is associated with rapid, marked rises in serum aminotransferase levels with subsequent appearance of jaundice. With severe injury there is early hepatic and multiorgan failure with jaundice and progressive hepatic encephalopathy, coagulopathy, and ascites. Immunoallergic features (fever, rash, flushing) are common initially, but may be obscured by corticosteroid therapy. Liver biopsy generally reveals zone 3 (centrolobular) necrosis and variable degrees of inflammation and cholestasis. Because docetaxel is often given with other antineoplastic agents, liver injury arising during therapy cannot always be attributed reliably to docetaxel as opposed to another specific agent. Furthermore, docetaxel in combination with other antineoplastic agents may be associated with reactivation of hepatitis B, increased risk of opportunistic viral infections, sinusoidal obstruction syndrome and sepsis, any of which can cause liver test abnormalities or clinically apparent liver injury.
The pharmacokinetic profile is consistent with a three-compartment model. The area under the curve (AUC) was dose proportional following doses of 70 mg/m2 to 115 mg/m2 with infusion times of 1 to 2 hours.
Docetaxel was eliminated in both the urine and feces following oxidative metabolism of the tert-butyl ester group, but fecal excretion was the main elimination route. Within 7 days, urinary and fecal excretion accounted for approximately 6% and 75% of the administered radioactivity, respectively.
The initial rapid decline represents distribution to the peripheral compartments and the late (terminal) phase is due, in part, to a relatively slow efflux of docetaxel from the peripheral compartment.
来源:DrugBank
吸收、分配和排泄
清除
21 升/小时/平方米 [总清除率,癌症患者在静脉给药 20-115 毫克/平方米后]
21 L/h/m2 [Total body clearance, cancer patients after IV administration of 20–115 mg/m2]
The initial rapid decline represents distribution to the peripheral compartments and the late (terminal) phase is due, in part, to a relatively slow efflux of docetaxel from the peripheral compartment. Mean steady state volume of distribution was 113 L. In vitro studies showed that docetaxel is about 94% protein bound, mainly to alpha1-acid glycoprotein, albumin, and lipoproteins. In three cancer patients, the in vitro binding to plasma proteins was found to be approximately 97%. Dexamethasone does not affect the protein binding of docetaxel.
A facile N-debenzoylation of paclitaxel: Conversion of paclitaxel to docetaxel
摘要:
An efficient and regioselective method for the N-debenzoylation of paclitaxel has been developed, and has been applied to the conversion of paclitaxel to 10-acetyldocetaxel and to docetaxel. (C) 1998 Elsevier Science Ltd. All rights reserved.
[EN] ACC INHIBITORS AND USES THEREOF<br/>[FR] INHIBITEURS DE L'ACC ET UTILISATIONS ASSOCIÉES
申请人:GILEAD APOLLO LLC
公开号:WO2017075056A1
公开(公告)日:2017-05-04
The present invention provides compounds I and II useful as inhibitors of Acetyl CoA Carboxylase (ACC), compositions thereof, and methods of using the same.
[EN] COMPOUNDS AND COMPOSITIONS COMPRISING CDK INHIBITORS AND METHODS FOR THE TREATMENT OF CANCER<br/>[FR] COMPOSÉS ET COMPOSITIONS COMPRENANT DES INHIBITEURS DES CDK ET MÉTHODES DE TRAITEMENT DU CANCER
申请人:UNIV GEORGIA STATE RES FOUND
公开号:WO2010129858A1
公开(公告)日:2010-11-11
Disclosed herein are compounds suitable for use as antitumor agents, methods for treating cancer wherein the disclosed compounds are used in making a medicament for the treatment of cancer, methods for treating a tumor comprising, administering to a subject a composition comprising one or more of the disclosed cytotoxic agents, and methods for preparing the disclosed antitumor agents.
[EN] 2-QUINOLONE DERIVED INHIBITORS OF BCL6<br/>[FR] INHIBITEURS DE BCL6 DÉRIVÉS DE 2-QUINOLONE
申请人:CANCER RESEARCH TECH LTD
公开号:WO2018215798A1
公开(公告)日:2018-11-29
The present invention relates to compounds of formula I that function as inhibitors of BCL6(B- cell lymphoma 6) activity: Formula I wherein X1, X2, X3, R1, R2, R3, R4 and R5 are each as defined herein. The present invention also relates to processes for the preparation of these compounds, to pharmaceutical compositions comprising them, and to their use in the treatment of proliferative disorders, such as cancer,as well as other diseases or conditions in which BCL6 activity is implicated.
[EN] PSMA-TARGETING AMANITIN CONJUGATES<br/>[FR] CONJUGUÉS D'AMANITINE CIBLANT LE PSMA
申请人:HEIDELBERG PHARMA RES GMBH
公开号:WO2019057964A1
公开(公告)日:2019-03-28
The invention relates to a PSMA-targeting conjugate comprising (a) an amatoxin; (b) a small molecule PSMA-targeting moiety; and (c) optionally a linker linking said amatoxin and said small molecule PSMA-targeting moiety. The invention furthermore relates to a pharmaceutical composition comprising such conjugate.
[EN] SUBSTITUTED N-HETEROCYCLIC CARBOXAMIDES AS ACID CERAMIDASE INHIBITORS AND THEIR USE AS MEDICAMENTS<br/>[FR] CARBOXAMIDES N-HÉTÉROCYCLIQUES SUBSTITUÉS UTILISÉS EN TANT QU'INHIBITEURS DE LA CÉRAMIDASE ACIDE ET LEUR UTILISATION EN TANT QUE MÉDICAMENTS
申请人:BIAL BIOTECH INVEST INC
公开号:WO2021055627A1
公开(公告)日:2021-03-25
The invention provides substituted N-heterocyclic carboxamides and related compounds, compositions containing such compounds, medical kits, and methods for using such compounds and compositions to treat a medical disorder, e.g., cancer, lysosomal storage disorder, neurodegenerative disorder, inflammatory disorder, in a patient.