게피티니브

게피티니브 속성

게피티니브 C화학적 특성, 용도, 생산

개요

Gefitinib was introduced in Japan as a daily oral monotherapy for the treatment of inoperable or recurrent non-small cell lung cancers (NSCLC). This anilinoquinazoline derivative can be synthesized in 6 steps starting from 6,7-dimethoxyquinazolin-4(3H)-one by successive monodemethylationlacetylation of the 6-hydroxy-group followed by chlorination and reaction with 3-chloro-4-fluoroaniline, finally deacetylation and alkylation with 3-(4-morpholinyl)propylbromide complete the synthesis. Gefitinib reversibly inhibits the activity of the epidermal growth factor receptor tyrosine kinase (EGRF TK). This inhibits autophosphorylation of EGRF and blocks the cascade of intracellular events which have been implicated in the proliferation, survival and metastasis of cancer cells. Gefitinib diplays good selectivity for the EGRF TK relative to other growth factors in human umbilical endothelial cells. It is similarly selective relative to other kinases, for example cerB2. Data from two large phase II studies in patients with pretreated NSCLC have shown that gefitinib induces a response rate approaching 20% in patients receiving the agent as a second line therapy and approximately 10% in those pretreated with more lines of chemotherapy. Gefitinib has good bioavailability and is metabolized in the liver via the cytochrome P450 3A4 enzyme system with a mean elimination half life of 28 h. Gefitinib has been generally well tolerated in cancer patients with predominant side effects being acne-like skin-rash, diarrhea, nausea, vomiting and mild to moderate myelosuppression. .

화학적 성질

Light-Yellow Crystalline Powder

용도

Gefitinib is an antineoplastic.

Indications

The EGFR or ErbB1 inhibitor gefitinib (Iressa(R), AstraZeneca) was originally approved by the US FDA in 2003 under accelerated regulations for the treatment of locally advanced or metastatic non-small cell lung cancer (NSCLC) after progression on docetaxel- and platinum-based chemotherapy. AstraZeneca voluntarily withdrew gefitinib from the market in 2005, owing to failed verification of clinical benefit during post-approval studies. In July 2015, FDA reinstated the approval of gefitinib for a different group of patients (i.e., NSCLC patients with EGFR mutations).
Other approved kinase inhibitors targeting the ErbB family, which includes ErbB1/EGFR, ErbB2/human epidermal growth factor receptor 2 (Her2), ErbB3/ Her3, and ErbB4/Her4, are erlotinib (Tarceva(R), OSI Pharm.), lapatinib (Tykerb(R), GlaxoSmithKline), vandetanib (Caprelsa(R), AstraZeneca), afatinib (Gilotrif(R), Boehringer Ingelheim) , and osimertinib (Tagrisso(R), AstraZeneca). All approved EGFR family inhibitors share a common quinazoline scaffold with the exception of osimertinib, which has a pyrimidinylphenylamine scaffold that resembles that of imatinib and nilotinib. Gefitinib and vandetanib adopt the type I binding mode with “DFG-in” and αC-helix “in” conformation, while erlotinib and lapatinib bind to“DFG-in”with the αC-helix adopting an “out” conformation. Afatinib and osimertinib are covalent inhibitors with an electrophilic enone moiety.

일반 설명

Geftinib is available as 250-mg tablets for oral administrationin the treatment of NSCLC for those patients who have failedto respond to platinum-based therapies and docetaxel and hasalso been used against squamous cell cancers of the head andneck. The agent is an inhibitor of the TK of EGF-R and possiblyother TKs as well. Gefitinib is both a substrate and inhibitorof Pgp and BCRP. The agent is absorbed slowly afterbeing administered orally with 60% bioavailability.Metabolism occurs in the liver and is mediated primarily byCYP3A4 to give eight identified metabolites resulting fromdefluorination of the phenyl ring, oxidative-O-demethylation,and multiple products arising as a result of oxidation of themorpholine ring. The O-demethylated product represents thepredominate metabolite and is 14-fold less active comparedwith the parent. The parent and metabolites are eliminated inthe feces with a terminal elimination half-life of 48 hours.The drug appears to be well tolerated with the most commonlyreported side effects being rash and diarrhea. It mayalso cause elevations in blood pressure especially in those patientswith preexisting hypertension, elevation of transaminaselevels, and mild nausea and mucositits.

생물학적 활성

Orally active, selective inhibitor of EGFR tyrosine kinase (IC 50 = 23-79 nM). Shows minimal activity against ErbB2, KDR, c-flt, PKC, MEK and ERK-2. Blocks EGFR autophosphorylation and inhibits tumor growth in mice bearing a range of human xenografts.

게피티니브 준비 용품 및 원자재

원자재

준비 용품

게피티니브 공급 업체

공급자	전화	이메일	국가	제품 수	이점
AFINE CHEMICALS LIMITED	0571-85134551	info@afinechem.com	CHINA	15377	58
Yangzhou Qinyuan Pharmatech Co.,ltd	+86-18752526868	jennysun@yzqyyykj.com	China	64	58
Hebei Dangtong Import and export Co LTD	+8615632927689	admin@hbdangtong.com	China	991	58
Firsky International Trade (Wuhan) Co., Ltd	+8615387054039	admin@firsky-cn.com	China	436	58
shandong perfect biotechnology co.ltd	+86-53169958659; +8618596095638	sales@sdperfect.com	China	294	58
Wuhan Ruichi Technology Co., Ltd	+8613545065237	admin@whrchem.com	China	164	58
Shaanxi TNJONE Pharmaceutical Co., Ltd	+8618740459177	sarah@tnjone.com	China	893	58
Frapp's ChemicalNFTZ Co., Ltd.	+86 (576) 8169-6106	sales@frappschem.com	China	885	50
Capot Chemical Co.,Ltd.	571-85586718 +8613336195806	sales@capotchem.com	China	29797	60
Beijing Cooperate Pharmaceutical Co.,Ltd	010-60279497	sales01@cooperate-pharm.com	CHINA	1811	55

게피티니브 관련 검색: