Pazopanib Hydrochloride

Pazopanib HCl is a receptor tyrosine kinase inhibitor that targets multiple kinases, including VEGFR1, VEGFR2, VEGFR3, PDGFR, FGFR, c-Kit, and c-Fms, with IC50s 10nM, 30nM, 47nM, 84nM, 74nM, 140nM, and 146nM respectively [1-3]. Pazopanib inhibits both tumor growth and angiogenesis through suppressing these targets. In preclinical studies, it has shown anti-tumor activity against several human tumor xenografts, including renal, prostate, colon, lung, melanoma, head and neck, and breast cancer [4]. It also showed desirable pharmacokinetics and oral bioavailability in animal models [4].

Pazopanib has been approved for advanced/metastatic renal cell carcinoma and advanced soft tissue sarcomas by multiple regulatory administrations worldwide, including FDA, EMA, MHRA and TGA. In the clinical trial for soft tissue sarcomas, Pazopanib improved median progression-free survival (PFS) to 4.6 months compared to 1.6 months for patients receiving placebo [5]. In the trial for renal cell carcinoma, Pazopanib increased the median PFS from 4.2 monthe (placebo) to 9.2 months [5]. The most common adverse effect of Pazopanib were diarrhea, hypertension, hair color change, nausea, fatigue, anorexia, and vomiting [6].

References:
1. Verweij J, Sleijfer S. Pazopanib, a new therapy for metastatic soft tissue sarcoma. Expert Opin Pharmacother 2013; 14: 929-935.
2. Pick AM, Nystrom KK. Pazopanib for the treatment of metastatic renal cell carcinoma. Clin Ther 2012; 34: 511-520.
3. Bukowski RM, Yasothan U, Kirkpatrick P. Pazopanib. Nat Rev Drug Discov 2010; 9: 17-18.
4. Sonpavde G, Hutson TE. Pazopanib: a novel multitargeted tyrosine kinase inhibitor. Curr Oncol Rep 2007; 9: 115-119.
5. http://www.cancer.gov/cancertopics/druginfo/fda-pazopanibhydrochloride
6. http://www.gsksource.com/gskprm/en/US/adirect/gskprm?cmd=ProductDetailPage&product_id=1336067580985&featureKey=603422

Analytical control of genotoxic impurities in the pazopanib hydrochloride manufacturing process.[Pubmed:19427156]

J Pharm Biomed Anal. 2009 Sep 8;50(2):144-50.

Pharmaceutical regulatory agencies are increasingly concerned with trace-level genotoxic impurities in drug substances, requiring manufacturers to deliver innovative approaches for their analysis and control. The need to control most genotoxic impurities in the low ppm level relative to the active pharmaceutical ingredient (API), combined with the often reactive and labile nature of genotoxic impurities, poses significant analytical challenges. Therefore, sophisticated analytical methodologies are often developed to test and control genotoxic impurities in drug substances. From a quality-by-design perspective, product quality (genotoxic impurity levels in this case) should be built into the manufacturing process. This necessitates a practical analysis and control strategy derived on the premise of in-depth process understanding. General guidance on how to develop strategies for the analysis and control of genotoxic impurities is currently lacking in the pharmaceutical industry. In this work, we demonstrate practical examples for the analytical control of five genotoxic impurities in the manufacturing process of Pazopanib Hydrochloride, an anticancer drug currently in Phase III clinical development, which may serve as a model for the other products in development. Through detailed process understanding, we implemented an analysis and control strategy that enables the control of the five genotoxic impurities upstream in the manufacturing process at the starting materials or intermediates rather than at the final API. This allows the control limits to be set at percent levels rather than ppm levels, thereby simplifying the analytical testing and the analytical toolkits to be used in quality control laboratories.

Analytical control of process impurities in Pazopanib hydrochloride by impurity fate mapping.[Pubmed:20189340]

J Pharm Biomed Anal. 2010 Aug 1;52(4):493-507.

Understanding the origin and fate of organic impurities within the manufacturing process along with a good control strategy is an integral part of the quality control of drug substance. Following the underlying principles of quality by design (QbD), a systematic approach to analytical control of process impurities by impurity fate mapping (IFM) has been developed and applied to the investigation and control of impurities in the manufacturing process of Pazopanib Hydrochloride, an anticancer drug approved recently by the U.S. FDA. This approach requires an aggressive chemical and analytical search for potential impurities in the starting materials, intermediates and drug substance, and experimental studies to track their fate through the manufacturing process in order to understand the process capability for rejecting such impurities. Comprehensive IFM can provide elements of control strategies for impurities. This paper highlights the critical roles that analytical sciences play in the IFM process and impurity control. The application of various analytical techniques (HPLC, LC-MS, NMR, etc.) and development of sensitive and selective methods for impurity detection, identification, separation and quantification are highlighted with illustrative examples. As an essential part of the entire control strategy for Pazopanib Hydrochloride, analytical control of impurities with 'meaningful' specifications and the 'right' analytical methods is addressed. In particular, IFM provides scientific justification that can allow for control of process impurities up-stream at the starting materials or intermediates whenever possible.

Characterization of forced degradation products of pazopanib hydrochloride by UHPLC-Q-TOF/MS and in silico toxicity prediction.[Pubmed:26349647]

J Mass Spectrom. 2015 Jul;50(7):918-28.

Pazopanib (PZ), an anti-cancer drug, was subjected to forced degradation under hydrolytic (acid, base and neutral), oxidative, photolytic and thermal stress conditions as per International Conference on Harmonization guidelines. A selective stability indicating validated method was developed using a Waters Acquity UPLC HSS T3 (100 x 2.1 mm, 1.7 microm) column in gradient mode with ammonium acetate buffer (10 mM, pH 5.0) and acetonitrile. PZ was found to degrade only in photolytic conditions to produce six transformation products (TPs). All the TPs were identified and characterized by liquid chromatography/atmospheric pressure chemical ionization-quadrupole-time of flight mass spectrometry experiments in combination with accurate mass measurements. Plausible mechanisms have been proposed for the formation of TPs. In silico toxicity was predicted using TOPKAT and DEREK softwares for all the TPs. The TP, N4-(2,3-dimethyl-2H-indazol-6-yl)-N4-methylpyrimidine-2,4-diamine, was found to be genotoxic, whereas all other TPs with sulfonamide moiety were hepatotoxic. The data reported here are expected to be of significance as this study foresees the formation of one potential genotoxic and five hepatotoxic degradation/transformation products.

Pazopanib Hydrochloride (GW786034 Hydrochloride) is a novel multi-target inhibitor of VEGFR1, VEGFR2, VEGFR3, PDGFRβ, c-Kit, FGFR1, and c-Fms with an IC50 of 10, 30, 47, 84, 74, 140 and 146 nM, respectively.

Pazopanib Hydrochloride,635702-64-6,GW786034,Natural Products,VEGFR, buy Pazopanib Hydrochloride , Pazopanib Hydrochloride supplier , purchase Pazopanib Hydrochloride , Pazopanib Hydrochloride cost , Pazopanib Hydrochloride manufacturer , order Pazopanib Hydrochloride , high purity Pazopanib Hydrochloride