Gemcitabine

inhibitor of DNA synthesis CAS# 95058-81-4

Gemcitabine

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Chemical structure

Gemcitabine

3D structure

Chemical Properties of Gemcitabine

Cas No. 95058-81-4 SDF Download SDF
PubChem ID 60750 Appearance Powder
Formula C9H11F2N3O4 M.Wt 263.2
Type of Compound N/A Storage Desiccate at -20°C
Synonyms NSC 613327; LY188011
Solubility DMSO : ≥ 103.3 mg/mL (392.48 mM)
Ethanol : 3.33 mg/mL (12.65 mM; Need ultrasonic)
*"≥" means soluble, but saturation unknown.
Chemical Name 4-amino-1-[(2R,4R,5R)-3,3-difluoro-4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]pyrimidin-2-one
SMILES C1=CN(C(=O)N=C1N)C2C(C(C(O2)CO)O)(F)F
Standard InChIKey SDUQYLNIPVEERB-QPPQHZFASA-N
Standard InChI InChI=1S/C9H11F2N3O4/c10-9(11)6(16)4(3-15)18-7(9)14-2-1-5(12)13-8(14)17/h1-2,4,6-7,15-16H,3H2,(H2,12,13,17)/t4-,6-,7-/m1/s1
General tips For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months.
We recommend that you prepare and use the solution on the same day. However, if the test schedule requires, the stock solutions can be prepared in advance, and the stock solution must be sealed and stored below -20℃. In general, the stock solution can be kept for several months.
Before use, we recommend that you leave the vial at room temperature for at least an hour before opening it.
About Packaging 1. The packaging of the product may be reversed during transportation, cause the high purity compounds to adhere to the neck or cap of the vial.Take the vail out of its packaging and shake gently until the compounds fall to the bottom of the vial.
2. For liquid products, please centrifuge at 500xg to gather the liquid to the bottom of the vial.
3. Try to avoid loss or contamination during the experiment.
Shipping Condition Packaging according to customer requirements(5mg, 10mg, 20mg and more). Ship via FedEx, DHL, UPS, EMS or other couriers with RT, or blue ice upon request.

Biological Activity of Gemcitabine

DescriptionGemcitabine is a DNA synthesis inhibitor with IC50 of 37.6, 42.9, 92.7, 89.3 and 131.4 nM in BxPC-3, Mia Paca-2, PANC-1, PL-45 and AsPC-1 cells, respectively.In Vitro:MTS assay demonstrates that Gemcitabine at 15 nM, indole-3-carbinol (I3C) at 50 μM and the combination does not affect hTERT-HPNE cell viability. However, treatment with Gemcitabine at 15 nM, I3C at 50 μM and the combination results in 31%, 19% and 72% cell death of BxPC-3 cells, respectively[1].In Vivo:Treatment of the LSL-KrasG12D/+; LSL-Trp53R172H; Pdx-1-Cre mice with either Gemcitabine (50 mg/kg, i.p.) or the combination DMAPT/Gemcitabine significantly increased the median survival time by more than 30 days compared to the placebo group (254.5 [P=0.015] or 255 days [P=0.018] vs. 217.5 days, respectively)[2]. Gemcitabine can be administered via endotracheal spray in rats without marked toxicity with a maximum tolerated dose of 4 mg/kg once a week for 9 weeks. The toxicity of Gemcitabine is lower via lung than oral administration at dosages of 2, 4, and 6 mg/kg[3].

References:
[1]. Wang H, et al. Enhanced efficacy of Gemcitabine by indole-3-carbinol in pancreatic cell lines: the role of human equilibrativenucleoside transporter 1. Anticancer Res. 2011 Oct;31(10):3171-80. [2]. Yip-Schneider MT, et al. Dimethylaminoparthenolide and Gemcitabine: a survival study using a genetically engineered mouse model of pancreatic cancer. BMC Cancer. 2013 Apr 17;13:194. [3]. Gagnadoux F, et al. Safety of pulmonary administration of gemcitabine in rats. J Aerosol Med. 2005 Summer;18(2):198-206. [4]. Lou M, et al. Physical interaction between human ribonucleotide reductase large subunit and thioredoxin increases colorectal cancer malignancy. J Biol Chem. 2017 Jun 2;292(22):9136-9149. [5]. Wang Y, et al. Licoricidin enhances gemcitabine-induced cytotoxicity in osteosarcoma cells by suppressing the Akt and NF-κB signal pathways. Chem Biol Interact. 2018 May 18;290:44-51.

Protocol

Cell Assay [1]
Cells (the human pancreatic cell lines, Mia PaCa-2, BxPC-3, AsPC-1, PANC-1, PL-45, and normal pancreatic ductal epithelial cells, hTERT-HPNE cells) are seeded into 96-well plates (3000 cells/well) in triplicate. After overnight incubation, the medium is changed and cells are treated with I3C and/or NBMPR for 24 h. The medium is changed again and cells are cultured in medium containing different concentrations of Gemcitabine in the presence or absence of the same concentrations of I3C and/or NBMPR for 48 h. The cells are then subjected to CellTiter 96 AQueous One Solution Cell Proliferation Assay (MTS) as per the manufacturer's instructions. Absorbance at 490 nm is measured 2 h after the addition of 20 μL of MTS reagent/well[1].

Animal Administration [2][3]
Mice[2] At 1 month of age, LSL-KrasG12D/+; LSL-Trp53R172H; Pdx-1-Cre mice are randomized into treatment groups (placebo, DMAPT, Gemcitabine, DMAPT/Gemcitabine). Placebo (vehicle=hydroxylpropyl methylcellulose, 0.2% Tween 80 [HPMT]) and DMAPT (40 mg/kg body weight in HPMT) are administered by oral gastric lavage once daily. Gemcitabine (50 mg/kg body weight in PBS) is administered by intraperitoneal injection twice weekly. Mouse weight is monitored weekly. Treatment is continued until mice show signs of lethargy, abdominal distension or weight loss at which time they are sacrificed. Successful excision-recombination events are confirmed in the pancreata of mice by detecting the presence of a single LoxP site. Rats[3] The study is conducted in 80 female Wistar rats, with an initial weight of approximately 250 g. Animals are identified by ear mark and divided into groups as follows. Forty rats are divided into five groups of eight: four groups had lung delivery of Gemcitabine via endotracheal spray at doses of 2, 4, 6, and 8 mg/kg, respectively (groups LD2, LD4, LD6, LD8), and one group receive a spray administration of the 0.9% saline vehicle solution (group LDv). The remaining 40 rats are divided into five groups of eight: four groups have oral delivery of Gemcitabine via gavage at doses of 2, 4, 6, and 8 mg/kg, respectively (groups OD2, OD4, OD6, OD8), and one group receive an identical volume of 0.9% saline via gavage (group ODv). The protocol includes nine sessions separated by 1-week intervals. Between sessions, the animals are kept under standard laboratory conditions and housed by groups of four animals in each cage with litter and free access to pellet food and tap water. Cages are placed in a closed chamber connected to an aspiration system.

References:
[1]. Wang H, et al. Enhanced efficacy of Gemcitabine by indole-3-carbinol in pancreatic cell lines: the role of human equilibrativenucleoside transporter 1. Anticancer Res. 2011 Oct;31(10):3171-80. [2]. Yip-Schneider MT, et al. Dimethylaminoparthenolide and Gemcitabine: a survival study using a genetically engineered mouse model of pancreatic cancer. BMC Cancer. 2013 Apr 17;13:194. [3]. Gagnadoux F, et al. Safety of pulmonary administration of gemcitabine in rats. J Aerosol Med. 2005 Summer;18(2):198-206. [4]. Lou M, et al. Physical interaction between human ribonucleotide reductase large subunit and thioredoxin increases colorectal cancer malignancy. J Biol Chem. 2017 Jun 2;292(22):9136-9149. [5]. Wang Y, et al. Licoricidin enhances gemcitabine-induced cytotoxicity in osteosarcoma cells by suppressing the Akt and NF-κB signal pathways. Chem Biol Interact. 2018 May 18;290:44-51.

Gemcitabine Dilution Calculator

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Preparing Stock Solutions of Gemcitabine

1 mg 5 mg 10 mg 20 mg 25 mg
1 mM 3.7994 mL 18.997 mL 37.9939 mL 75.9878 mL 94.9848 mL
5 mM 0.7599 mL 3.7994 mL 7.5988 mL 15.1976 mL 18.997 mL
10 mM 0.3799 mL 1.8997 mL 3.7994 mL 7.5988 mL 9.4985 mL
50 mM 0.076 mL 0.3799 mL 0.7599 mL 1.5198 mL 1.8997 mL
100 mM 0.038 mL 0.19 mL 0.3799 mL 0.7599 mL 0.9498 mL
* Note: If you are in the process of experiment, it's necessary to make the dilution ratios of the samples. The dilution data above is only for reference. Normally, it's can get a better solubility within lower of Concentrations.

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Background on Gemcitabine

Gemcitabine is an inhibitor of DNA synthesis [1].

DNA synthesis is a natural creation of deoxyribonucleic acid (DNA) molecules and plays an important role in cell growth.

Gemcitabine is an active chemotherapeutic agents that disrupt DNA replication. In tumor cells, gemcitabine activated checkpoint kinase 2 (Chk2) and ataxia-telangiectasia mutated kinase (ATM), which regulated apoptosis, DNA repair and cell-cycle arrest. Also, gemcitabine activated the Rad9-Hus1-Rad1 complex and the protein kinases ATM and ATR and checkpoint kinase 1 (Chk1), which blocked cell-cycle progression and influence DNA repair [1]. Gemcitabine is a DNA synthesis inhibitor with anti-tumor activity. In human osteosarcoma cell lines HOS and MG63, gemcitabine inhibited DNA synthesis and induced apoptosis [2].

In C3H mice inoculated with murine osteosarcoma cell line LM8, gemcitabine induced cell apoptotics and reduced the size of primary tumor. Also, it inhibited metastatic lesions in the lung [2]. In C57Bl/6 mice infected with LP-BM5 murine leukemia virus, gemcitabine significantly inhibited disease progression. Also, gemcitabine reduced spleen size, provirus levels and plasma IgM [3].

References:
[1].  Karnitz LM, Flatten KS, Wagner JM, et al. Gemcitabine-induced activation of checkpoint signaling pathways that affect tumor cell survival. Mol Pharmacol, 2005, 68(6): 1636-1644.
[2].  Ando T, Ichikawa J, Okamoto A, et al. Gemcitabine inhibits viability, growth, and metastasis of osteosarcoma cell lines. J Orthop Res, 2005, 23(4): 964-969.
[3].  Clouser CL, Holtz CM, Mullett M, et al. Analysis of the ex vivo and in vivo antiretroviral activity of gemcitabine. PLoS One, 2011, 6(1): e15840.

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References on Gemcitabine

Comparison of Efficacy of Adjuvant MEC (Methotrexate, Epirubicin and Cisplatin) and GC (Gemcitabine and Cisplatin) in Advanced Upper Tract Urothelial Carcinoma.[Pubmed:28373455]

Anticancer Res. 2017 Apr;37(4):1875-1883.

AIM: To evaluate the efficacy of methotrexate, epirubicin and cisplatin (MEC) or Gemcitabine and cisplatin (GC) as adjuvant chemotherapy in advanced upper tract urothelium carcinoma (UTUC). PATIENTS AND METHODS: From 2002 January to 2008 December, a total of 70 patients with advanced UTUC received radical nephroureterctomy at our Institute with MEC and GC as adjuvant chemotherapy. Disease-free survival (DFS), cancer-specific survival (CSS) and overall survival (OS) among the two groups were evaluated. RESULTS: The MEC (n=30) and GC group (n=40) were compared and showed no significant differences in DFS (p=0.859), CSS (p=0.722) and OS (p=0.691). Positive lymph nodes, preoperative creatinine >1.5, old age, a high ECOG state and low BMI are all the independent risk factors of poor prognosis in advanced UTUC. CONCLUSION: In patients with UTUC, MEC has a non-inferior efficacy to GC in consideration of cancer recurrence, cancer-specific survival and overall survival.

Gemcitabine Conjugated Chitosan and Double Antibodies (Abc-GC-Gemcitabine Nanoparticles) Enhanced Cytoplasmic Uptake of Gemcitabine and Inhibit Proliferation and Metastasis In Human SW1990 Pancreatic Cancer Cells.[Pubmed:28366930]

Med Sci Monit. 2017 Apr 3;23:1613-1620.

BACKGROUND Pancreatic cancer is considered a chemoresistant neoplasm with extremely dismal prognosis and Gemcitabine treatment is associated with many side effects and poor overall survival. The study aimed at developing a new nanobioconjugate, which specifically delivered Gemcitabine and anti-EGFR antibody into pancreatic cancer cells. MATERIAL AND METHODS The novel nanodrug is based on chitosan platform, which is non-toxic, biocompatibility and biodegradable. We measured the effects of proliferation and metastasis on SW1990 by CCK-8 assay, colony formation assay, wound healing assay and Transwell assay. The expression of related proteins were evaluated by Western blot. RESULTS We synthesized Abc-GC-Gemcitabine nanoparticles successfully with the encapsulation rate of nanobioconjugates was 91.63% and the drug loadings was 9.97%. Both GC-Gemcitabine microspheres solution (GC group) and Abc-GC-Gemcitabine microspheres solution (Abc group) inhibited cells proliferation, colony formation, migration and invasion in SW1990 cells dramatically. Moreover, Abc-GC-Gemcitabine microspheres expressed more significant inhibited action than GC-Gemcitabine microspheres efficiently CONCLUSIONS Our data suggested that Abc-GC-Gemcitabine nanoparticles could have promising potential in treating metastasized and chemoresistant pancreatic cancer by enhancing the drug efficacy and minimizing off target effects.

Long-term results and recurrence patterns from SCALOP: a phase II randomised trial of gemcitabine- or capecitabine-based chemoradiation for locally advanced pancreatic cancer.[Pubmed:28376080]

Br J Cancer. 2017 May 9;116(10):1264-1270.

BACKGROUND: SCALOP, a randomised, phase II trial, tested the activity and safety of Gemcitabine (GEM)-based and capecitabine (CAP)-based chemoradiation (CRT) for locally advanced pancreatic cancer (LAPC). Here we present the long-term outcomes. METHODS: Eligibility: histologically proven LAPC 7 cm. Following 12 weeks of induction GEMCAP chemotherapy (three cycles: GEM 1000 mg m(-2) days 1, 8, 15; CAP 830 mg m(-2) days 1-21 q28 days) patients with stable/responding disease, tumour 6 cm, and WHO Performance Status 0-1 were randomised to receive one cycle GEMCAP followed by CAP (830 mg m(-2) b.d. on weekdays only) or GEM (300 mg m(-2) weekly) with radiation (50.4 Gy per 28 fractions). RESULTS: One-hundred fourteen patients (28 UK centres) were registered between 24 December 2009 and 25 October 2011, and 74 were randomised (CAP-RT=36; GEM-RT=38). At the time of this analysis, 105 of the 114 patients had died and the surviving 9 patients had been followed up for a median of 10.9 months (IQR: 2.9-18.7). Updated median OS was 17.6 months (95% CI: 14.6-22.7) in the CAP-CRT arm and 14.6 months (95% CI: 11.1-16.0) in the GEM-CRT arm (intention-to-treat adjusted hazard ratio (HR): 0.68 (95% CI: 0.38-1.21, P=0.185)); median progression-free survival (PFS) was 12.0 months (95% CI: 10.0-15.2) in the CAP-CRT arm and 10.4 months (95% CI: 8.8-12.7) in the GEM-CRT arm (intention-to-treat adjusted HR: 0.60 (95% CI: 0.32-1.14, P=0.120)). In baseline multivariable model, age 65 years, better performance status, CA19.9<613 IU l(-1), and shorter tumour diameter predicted improved OS. CAP-CRT, age 65 years, better performance status, CA19.9 <46 IU ml(-1) predicted improved OS and PFS in the pre-radiotherapy model. Nine-month PFS was highly predictive of OS. CONCLUSIONS: CAP-CRT remains the superior regimen. SCALOP showed that patients with CA19.9 <46 IU ml(-1) after induction chemotherapy are more likely to benefit from CRT.

Nab-Paclitaxel and Gemcitabine in Advanced Pancreatic Cancer: The One-year Experience of the National Cancer Institute of Naples.[Pubmed:28373469]

Anticancer Res. 2017 Apr;37(4):1975-1978.

BACKGROUND: Pancreas adenocarcinoma is the sixth cause of cancer-related death worldwide with an increasing mortality in the Western countries. Recently, the association between nab-paclitaxel (nab-P) and Gemcitabine (GEM) has significantly improved progression-free and overall survival. PATIENTS AND METHODS: Patients affected by metastatic pancreas adenocarcinoma were treated at the Department of Abdominal Oncology of the National Cancer Institute of Naples from July 2015 to July 2016 with nab-P at 125 mg per square meter of body-surface area followed by GEM at 1,000 mg per square meter on days 1, 8 and 15 every 4 weeks. Computed tomography (CT) was performed every three months of therapy. Toxicity was graded with National Cancer Institute-Common Toxicity Criteria (NCI-CTC) v4.0. Objective responses were evaluated with Response Evaluation Criteria in Solid Tumors (RECIST). Analysis of time-to-progression is only descriptive. Pain was evaluated with a visual analogue scale (VAS). RESULTS: Twenty-three patients were treated. Median age was 67 years (range=45-81); 8 patients were >/=70 years old. Performance status (PS) Eastern Cooperative Oncology Group (ECOG) was 2 in 8 patients, 1 in 10 and 0 in 5. Twelve patients presented with diffuse hepatic metastases, 4 with carcinosis, 7 with more than one organ involvement. Nab-P was reduced at 100 mg per square meter in all patients. The most common G3/G4 adverse events were neutropenia (13.0% G4, 8.6% G3; none was febrile), neuropathy (30.4% G3) and asthenia (G3 17.3%). The disease control rate was 43.4% (partial response+stable disease (PR+SD) 10/23). The median time-to-progression was 7.9 months (95% confidence interval (CI)=5.8-11.2). After three months of therapy the PS improved in 14 patients, as well as pain in 18 patients. CONCLUSION: We present an experience with nab-P and GEM association in a series with poor PS and highly metastatic disease relatively to a previous randomized study. The schedule is feasible, with nab-P at 100 mg per square meter achieving a good disease control rate, as well as a clinical benefit.

Description

Gemcitabine (LY 188011) is a pyrimidine nucleoside analog antimetabolite and an antineoplastic agent. Gemcitabine inhibits DNA synthesis and repair, resulting in autophagyand apoptosis. Gemcitabine inhibits the growth of BxPC-3, Mia Paca-2, PANC-1, PL-45 and AsPC-1 cells with IC50s of 37.6 nM, 42.9 nM, 92.7 nM, 89.3 nM and 131.4 nM, respectively.

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