VEGFR2 4.2 nM (IC50) PDGFRβ 6.6 nM (IC50) c-kit 2.3 nM (IC50)

Famitinib malate suppresses the microvessel spouting from rat aortic rings placed in matrigel, as well as the VEGF-induced proliferation, migration, and tubule formation of human umbilical vein endothelial cells[1]. In gastric cancer cell lines, fumitinib malate (1.8 and 3.6 μM; 48 h) induces cell cycle arrest at the G2/M phase, which reduces cell growth, and causes dose-dependent cell apoptosis[2]. In a dose-dependent manner, fumitinib malate (0.6-20.0 µM; 24-72 h) suppresses the development of gastric cancer cells[2].

Numerous established xenografts made from human tumor cell lines experience regression or growth arrest when exposed to fumitinib malate, which has extensive and strong anti-tumor action [1]. By inhibiting angiogenesis, mitinib malate (50 and 100 mg/kg; po once daily for 3 weeks) decreases the growth of tumors in vivo[2].

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In vivo, famitinib exhibited broad and potent anti-tumor activity, leading to regression or growth arrest of various established xenografts derived from human tumor cell lines. Moreover, famitinib significantly enhanced the efficacy of oxaliplatin or 5-fluorouracil when they were combined. In summary, famitinib has potent preclinical antitumor activity which supports its further evaluation in clinic. Famitinib is currently in phase I clinical trials in China[1].

Famitinib inhibited the activity of c-kit, VEGFR-2, PDGFRα and PDGFRβ with IC50 values of 2.3 nM, 4.7 nM and 6.6 nM, respectively. In addition, Famitinib inhibited the VEGF-induced proliferation, migration and tubule formation of human umbilical vein endothelial cells, and micro-vessel spouting from matrigel-embedded rat aortic rings.[1]

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Terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) assay Cell apoptosis was measured via TUNEL assay according to the manufacturer's protocol. Upon treatment of the cells with famitinib for 48 h, cells were washed with phosphate-buffered saline (PBS) and fixed with 4% paraformaldehyde for 10 min at room temperature. Cells were then stained with the corresponding reagents provided in the TUNEL assay kit. Upon overlaying the coverslips, slides were imaged under fluorescence microscopy. Positive cells exhibited green fluorescence and were counted from three random microscopic fields[2].

Cell Proliferation Assay[2]
Cell Types: Human gastric cancer cells BGC-823 and MGC-803
Tested Concentrations: 0, 0.6, 1.25, 2.5, 5.0, 10.0 and 20.0 µM
Incubation Duration: 24, 48 and 72 hrs (hours)
Experimental Results: Inhibited cell growth in a dose-dependent manner with IC50 values of 3.6 and 3.1 µM for BGC-823 and MGC -803 cells, respectively.

Animal/Disease Models: 18-20 g female BALB/c athymic nu/nu (nude) mice (age, 6–8 weeks) bearing BGC-823 xenografts[2]
Doses: 50 and 100 mg/kg
Route of Administration: po (oral gavage); 50 and 100 mg/kg; one time/day for 3 weeks
Experimental Results: Inhibited BGC-823 xenograft growth (tumor volume, 395.2 vs. 2,690.5 mm3), and animal weights were similar between groups (21.6 vs. 18.7 g).

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In vivo xenograft model experiments BGC-823 cells were suspended in PBS (1×107 cells/ml), and 100 µl of the cell suspension was subcutaneously injected into the right axillary area of 18-20-g female BALB/c athymic nu/nu mice (n=40; age, 6–8 weeks). The temperature of the housing conditions was maintained at 23–25°C with a humidity of 50–60% and a 10/14 h light/dark cycle. Food and water were changed 3 times a week. When the tumor volume reached ~100 mm3, mice were randomized into treatment groups. Tumors and animal weights were measured twice weekly, and tumor volume was calculated using the following formula: V=LxW2x1/2 (where V represents tumor volume, L is the length of the tumor and W is the width of the tumor). To measure famitinib, three groups were randomized (n=5 mice/group) as follows: Control group (gavage, physiological saline, once daily for 3 weeks); low-dose famitinib group (gavage, 50 mg/kg, once daily for 3 weeks); and high-dose famitinib group (gavage, 100 mg/kg, once for 3 weeks). A dose of 50 mg/kg was used for the following experiments. To compare famitinib with other drugs, animals were randomized (n=5 mice/group) as follows: Control group (gavage, physiological saline, once daily for 3 weeks); famitinib group (gavage, 50 mg/kg, once daily for 3 weeks); 5-FU group [10 mg/kg, intraperitoneal (ip), once every 2 days for 3 weeks]; DDP group (3 mg/kg, ip, once weekly for 3 weeks); and PTX group (10 mg/kg, ip, once a week for 3 weeks). Then, tumors and weight were quantified[2].

[1]. Abstract 3604: Preclinical antitumor study of famitinib, an orally available multi-targeted kinase inhibitor of VEGFR/PDGFR/c-Kit in phase I clinical trials.

[2]. Famitinib exerted powerful antitumor activity in human gastric cancer cells and xenografts. Oncol Lett. 2016 Sep;12(3):1763-1768.

Famitinib (SHR1020), a novel multi-targeted tyrosine kinase inhibitor, has antitumor activity against several solid tumors via targeting vascular endothelial growth factor receptor 2, c-Kit and platelet-derived growth factor receptor β. The present study investigated famitinib's activity against human gastric cancer cells in vitro and in vivo. Cell viability and apoptosis were measured, and cell cycle analysis was performed following famitinib treatment using 3-(4,5-dimethylthiazol -2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium assay, flow cytometry, terminal deoxynucleotidyl transferase dUTP nick end labeling assay and western blotting. Subsequently, cluster of differentiation 34 staining was used to evaluate microvessel density. BGC-823-derived xenografts in nude mice were established to assess drug efficacy in vivo. Famitinib inhibited cell proliferation by inducing cell cycle arrest at the G2/M phase and caused cell apoptosis in a dose-dependent manner in gastric cancer cell lines. In BGC-823 xenograft models, famitinib significantly slowed tumor growth in vivo via inhibition of angiogenesis. Compared with other chemotherapeutics such as 5-fluorouracil, cisplatin or paclitaxel alone, famitinib exhibited the greatest tumor suppression effect (>85% inhibition). The present study demonstrated for the first time that famitinib has efficacy against human gastric cancer in vitro and in vivo, which may lay the foundations for future clinical trials.[2]

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Angiogenesis plays a key role in tumor progression and anti-angiogenic agents including sunitinib and sorafenib that target VEGF/VEGFR signaling pathway have been proved to an effective therapy for cancer in the clinic. However, severe side effects such as hypertension and bone marrow toxicity limit their clinical application. Thus, development of novel anti-angiogenic agents with fewer side effects is still an unmet challenge. In this study, we characterized the in vitro and in vivo antitumor activity of famitinib, an orally active multi-targeted kinase inhibitor. Famitinib inhibited the activity of c-kit, VEGFR-2, PDGFRα and PDGFRβ with IC50 values of 2.3 nM, 4.7 nM and 6.6 nM, respectively. In addition, Famitinib inhibited the VEGF-induced proliferation, migration and tubule formation of human umbilical vein endothelial cells, and micro-vessel spouting from matrigel-embedded rat aortic rings. In vivo, famitinib exhibited broad and potent anti-tumor activity, leading to regression or growth arrest of various established xenografts derived from human tumor cell lines. Moreover, famitinib significantly enhanced the efficacy of oxaliplatin or 5-fluorouracil when they were combined. In summary, famitinib has potent preclinical antitumor activity which supports its further evaluation in clinic. Famitinib is currently in phase I clinical trials in China.[1]

C27H33FN4O7

544.233

1256377-67-9

Famitinib;1044040-56-3

49840531

Typically exists as solid at room temperature

2.224

5

9

9

39

824

1

[C@@H](O)(C(=O)O)CC(=O)O.C(C1NC2CCN(CCN(CC)CC)C(=O)C=2C=1C)=C1C(NC2=CC=C(F)C=C12)=O

JNDRBKCNKMZANY-QLTVYZEUSA-N

InChI=1S/C23H27FN4O2.C4H6O5/c1-4-27(5-2)10-11-28-9-8-19-21(23(28)30)14(3)20(25-19)13-17-16-12-15(24)6-7-18(16)26-22(17)29;5-2(4(8)9)1-3(6)7/h6-7,12-13,25H,4-5,8-11H2,1-3H3,(H,26,29);2,5H,1H2,(H,6,7)(H,8,9)/b17-13-;/t;2-/m.0/s1

5-[2-(diethylamino)ethyl]-2-[(Z)-(5-fluoro-2-oxo-1H-indol-3-ylidene)methyl]-3-methyl-6,7-dihydro-1H-pyrrolo[3,2-c]pyridin-4-one;(2S)-2-hydroxybutanedioic acid

Famitinib malate; Famitinib S-malate; 4RST0F28MR; UNII-4RST0F28MR; 1256377-67-9; Famitinib L-Malate; Famitinib malate [WHO-DD]; DTXSID30154828

2934.99.9001

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)

May dissolve in DMSO (in most cases), if not, try other solvents such as H2O, Ethanol, or DMF with a minute amount of products to avoid loss of samples

Note: Listed below are some common formulations that may be used to formulate products with low water solubility (e.g. < 1 mg/mL), you may test these formulations using a minute amount of products to avoid loss of samples.

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Injection Formulation 1: DMSO : Tween 80： Saline = 10 : 5 : 85 (i.e. 100 μL DMSO stock solution → 50 μL Tween 80 → 850 μL Saline)
*Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH ₂ O to obtain a clear solution.
Injection Formulation 2: DMSO : PEG300 ：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL DMSO → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline)
Injection Formulation 3: DMSO : Corn oil = 10 : 90 (i.e. 100 μL DMSO → 900 μL Corn oil)
Example: Take the Injection Formulation 3 (DMSO : Corn oil = 10 : 90) as an example, if 1 mL of 2.5 mg/mL working solution is to be prepared, you can take 100 μL 25 mg/mL DMSO stock solution and add to 900 μL corn oil, mix well to obtain a clear or suspension solution (2.5 mg/mL, ready for use in animals).

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Injection Formulation 4: DMSO : 20% SBE-β-CD in saline = 10 : 90 [i.e. 100 μL DMSO → 900 μL (20% SBE-β-CD in saline)]
*Preparation of 20% SBE-β-CD in Saline (4°C，1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution.
Injection Formulation 5: 2-Hydroxypropyl-β-cyclodextrin : Saline = 50 : 50 (i.e. 500 μL 2-Hydroxypropyl-β-cyclodextrin → 500 μL Saline)
Injection Formulation 6: DMSO : PEG300 : castor oil : Saline = 5 : 10 : 20 : 65 (i.e. 50 μL DMSO → 100 μLPEG300 → 200 μL castor oil → 650 μL Saline)
Injection Formulation 7: Ethanol : Cremophor : Saline = 10： 10 : 80 (i.e. 100 μL Ethanol → 100 μL Cremophor → 800 μL Saline)
Injection Formulation 8: Dissolve in Cremophor/Ethanol (50 : 50), then diluted by Saline
Injection Formulation 9: EtOH : Corn oil = 10 : 90 (i.e. 100 μL EtOH → 900 μL Corn oil)
Injection Formulation 10: EtOH : PEG300：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL EtOH → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline)

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Oral Formulation 1: Suspend in 0.5% CMC Na (carboxymethylcellulose sodium)
Oral Formulation 2: Suspend in 0.5% Carboxymethyl cellulose
Example: Take the Oral Formulation 1 (Suspend in 0.5% CMC Na) as an example, if 100 mL of 2.5 mg/mL working solution is to be prepared, you can first prepare 0.5% CMC Na solution by measuring 0.5 g CMC Na and dissolve it in 100 mL ddH2O to obtain a clear solution; then add 250 mg of the product to 100 mL 0.5% CMC Na solution, to make the suspension solution (2.5 mg/mL, ready for use in animals).

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Oral Formulation 3: Dissolved in PEG400
Oral Formulation 4: Suspend in 0.2% Carboxymethyl cellulose
Oral Formulation 5: Dissolve in 0.25% Tween 80 and 0.5% Carboxymethyl cellulose
Oral Formulation 6: Mixing with food powders

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Note: Please be aware that the above formulations are for reference only. InvivoChem strongly recommends customers to read literature methods/protocols carefully before determining which formulation you should use for in vivo studies, as different compounds have different solubility properties and have to be formulated differently.

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 (Please use freshly prepared in vivo formulations for optimal results.)