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Delle Cave D, Rizzo R, Sainz B, Gigli G, del Mercato LL, Lonardo E. The Revolutionary Roads to Study Cell-Cell Interactions in 3D In Vitro Pancreatic Cancer Models. Cancers (Basel) 2021; 13:930. [PMID: 33672435 PMCID: PMC7926501 DOI: 10.3390/cancers13040930] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 02/07/2021] [Accepted: 02/18/2021] [Indexed: 12/19/2022] Open
Abstract
Pancreatic cancer, the fourth most common cancer worldwide, shows a highly unsuccessful therapeutic response. In the last 10 years, neither important advancements nor new therapeutic strategies have significantly impacted patient survival, highlighting the need to pursue new avenues for drug development discovery and design. Advanced cellular models, resembling as much as possible the original in vivo tumor environment, may be more successful in predicting the efficacy of future anti-cancer candidates in clinical trials. In this review, we discuss novel bioengineered platforms for anticancer drug discovery in pancreatic cancer, from traditional two-dimensional models to innovative three-dimensional ones.
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Affiliation(s)
- Donatella Delle Cave
- Institute of Genetics and Biophysics “A. Buzzati-Traverso”, National Research Council (CNR-IGB), Via Pietro Castellino 111, 80131 Naples, Italy;
| | - Riccardo Rizzo
- Institute of Nanotechnology, National Research Council (CNR-NANOTEC), c/o Campus Ecotekne, via Monteroni, 73100 Lecce, Italy; (R.R.); (G.G.); (L.L.d.M.)
| | - Bruno Sainz
- Department of Cancer Biology, Instituto de Investigaciones Biomedicas “Alberto Sols” (IIBM), CSIC-UAM, 28029 Madrid, Spain;
- Spain and Chronic Diseases and Cancer, Area 3-Instituto Ramon y Cajal de Investigacion Sanitaria (IRYCIS), 28029 Madrid, Spain
| | - Giuseppe Gigli
- Institute of Nanotechnology, National Research Council (CNR-NANOTEC), c/o Campus Ecotekne, via Monteroni, 73100 Lecce, Italy; (R.R.); (G.G.); (L.L.d.M.)
- Department of Mathematics and Physics “Ennio De Giorgi”, University of Salento, via Arnesano, 73100 Lecce, Italy
| | - Loretta L. del Mercato
- Institute of Nanotechnology, National Research Council (CNR-NANOTEC), c/o Campus Ecotekne, via Monteroni, 73100 Lecce, Italy; (R.R.); (G.G.); (L.L.d.M.)
| | - Enza Lonardo
- Institute of Genetics and Biophysics “A. Buzzati-Traverso”, National Research Council (CNR-IGB), Via Pietro Castellino 111, 80131 Naples, Italy;
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A Severe Case of Drug-Induced Liver Injury after Gemcitabine Administration: A Highly Probable Causality Grading as Assessed by the Updated RUCAM Diagnostic Scoring System. Case Reports Hepatol 2020; 2020:8812983. [PMID: 33083070 PMCID: PMC7556098 DOI: 10.1155/2020/8812983] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 09/13/2020] [Accepted: 09/15/2020] [Indexed: 01/13/2023] Open
Abstract
Gemcitabine is an antineoplastic drug used in several forms of advanced pancreatic, lung, breast, ovarian, and bladder cancer. Common side effects include bone marrow suppression, fatigue, diarrhea, nausea, gastrointestinal upset, rash, alopecia, and stomatitis. Transient serum enzyme elevations could be observed during therapy, but clinically significant acute liver injury has been rarely associated with its use. Few cases of acute liver injury have been reported in the literature. We reported the clinical case of a 73--year-old man who developed clinically significant acute hepatic injury after using gemcitabine. Possible causes, clinical presentation, and treatments are discussed. According to the updated RUCAM score, the case was rated 10 points and became a suspected drug-induced liver injury. Moreover, on the liver biopsy, there were histological findings of mild-to-moderate portal hepatitis, eosinophilia, bile duct injury, and mild perisinusoidal fibrosis, suggesting drug damage.
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Hailan WAQ, Abou-Tarboush FM, Al-Anazi KM, Ahmad A, Qasem A, Farah MA. Gemcitabine induced cytotoxicity, DNA damage and hepatic injury in laboratory mice. Drug Chem Toxicol 2018; 43:158-164. [PMID: 30203996 DOI: 10.1080/01480545.2018.1504957] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The present study was conducted to demonstrate cytotoxicity, apoptosis and hepatic damage induced by gemcitabine in laboratory mice. Animals were treated with a single dose of gemcitabine (415 mg/kg body wt), equivalent to a human therapeutic dose, and sacrificed after 1, 2 and 3 weeks. A significant decrease in mean body weight and absolute liver weight was registered. The levels of alkaline phosphatase (ALP), aspartate aminotransferase (AST) and alanine aminotransferase (ALT) were increased as a result of this induced stress. Various structural changes were observed in the liver tissue of treated mice, as evident in the histological sections. Specifically, gemcitabine exposure was able to induce apoptosis in liver cells, and the incidence of TUNEL positive liver cells was increased compared to the control group. DNA fragmentation appeared on agarose gel and flow cytometry analysis confirmed the induction of apoptosis. These findings in gemcitabine-treated animal tissues suggest that inhibition or disruption of cells' DNA synthesis may be the mechanism by which this drug induces toxicity in the animal body.
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Affiliation(s)
- Waleed A Q Hailan
- Department of Zoology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | | | - Khalid M Al-Anazi
- Department of Zoology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Areeba Ahmad
- Department of Zoology, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, India
| | - Ahmed Qasem
- Department of Zoology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Mohammad Abul Farah
- Department of Zoology, College of Science, King Saud University, Riyadh, Saudi Arabia
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4
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Engineering approaches in siRNA delivery. Int J Pharm 2017; 525:343-358. [PMID: 28213276 DOI: 10.1016/j.ijpharm.2017.02.032] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Revised: 02/10/2017] [Accepted: 02/11/2017] [Indexed: 12/18/2022]
Abstract
siRNAs are very potent drug molecules, able to silence genes involved in pathologies development. siRNAs have virtually an unlimited therapeutic potential, particularly for the treatment of inflammatory diseases. However, their use in clinical practice is limited because of their unfavorable properties to interact and not to degrade in physiological environments. In particular they are large macromolecules, negatively charged, which undergo rapid degradation by plasmatic enzymes, are subject to fast renal clearance/hepatic sequestration, and can hardly cross cellular membranes. These aspects seriously impair siRNAs as therapeutics. As in all the other fields of science, siRNAs management can be advantaged by physical-mathematical descriptions (modeling) in order to clarify the involved phenomena from the preparative step of dosage systems to the description of drug-body interactions, which allows improving the design of delivery systems/processes/therapies. This review analyzes a few mathematical modeling approaches currently adopted to describe the siRNAs delivery, the main procedures in siRNAs vectors' production processes and siRNAs vectors' release from hydrogels, and the modeling of pharmacokinetics of siRNAs vectors. Furthermore, the use of physical models to study the siRNAs vectors' fate in blood stream and in the tissues is presented. The general view depicts a framework maybe not yet usable in therapeutics, but with promising possibilities for forthcoming applications.
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5
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Stocke NA, Sethi P, Jyoti A, Chan R, Arnold SM, Hilt JZ, Upreti M. Toxicity evaluation of magnetic hyperthermia induced by remote actuation of magnetic nanoparticles in 3D micrometastasic tumor tissue analogs for triple negative breast cancer. Biomaterials 2016; 120:115-125. [PMID: 28056401 DOI: 10.1016/j.biomaterials.2016.12.019] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 11/10/2016] [Accepted: 12/16/2016] [Indexed: 12/20/2022]
Abstract
Magnetic hyperthermia as a treatment modality is acquiring increased recognition for loco-regional therapy of primary and metastatic lung malignancies by pulmonary delivery of magnetic nanoparticles (MNP). The unique characteristic of magnetic nanoparticles to induce localized hyperthermia in the presence of an alternating magnetic field (AMF) allows for preferential killing of cells at the tumor site. In this study we demonstrate the effect of hyperthermia induced by low and high dose of MNP under the influence of an AMF using 3D tumor tissue analogs (TTA) representing the micrometastatic, perfusion independent stage of triple negative breast cancer (TNBC) that infiltrates the lungs. While application of inhalable magnetic nanocomposite microparticles or magnetic nanocomposites (MnMs) to the micrometastatic TNBC model comprised of TTA generated from cancer and stromal cells, showed no measureable adverse effects in the absence of AMF-exposure, magnetic hyperthermia generated under the influence of an AMF in TTA incubated in a high concentration of MNP (1 mg/mL) caused significant increase in cellular death/damage with mechanical disintegration and release of cell debris indicating the potential of these inhalable composites as a promising approach for thermal treatment of diseased lungs. The novelty and significance of this study lies in the development of methods to evaluate in vitro the application of inhalable composites containing MNPs in thermal therapy using a physiologically relevant metastatic TNBC model representative of the microenvironmental characteristics in secondary lung malignancies.
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Affiliation(s)
- Nathanael A Stocke
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
| | - Pallavi Sethi
- Department of Pharmaceutical Science, University of Kentucky, Lexington, KY 40506, USA
| | - Amar Jyoti
- Department of Pharmaceutical Science, University of Kentucky, Lexington, KY 40506, USA
| | - Ryan Chan
- Department of Pharmaceutical Science, University of Kentucky, Lexington, KY 40506, USA
| | - Susanne M Arnold
- College of Medicine, Department of Internal Medicine, University of Kentucky, Lexington, KY 40506, USA
| | - J Zach Hilt
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
| | - Meenakshi Upreti
- Department of Pharmaceutical Science, University of Kentucky, Lexington, KY 40506, USA.
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An in vitro assessment of liposomal topotecan simulating metronomic chemotherapy in combination with radiation in tumor-endothelial spheroids. Sci Rep 2015; 5:15236. [PMID: 26468877 PMCID: PMC4606561 DOI: 10.1038/srep15236] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Accepted: 09/02/2015] [Indexed: 12/31/2022] Open
Abstract
Low dose metronomic chemotherapy (LDMC) refers to prolonged administration of low dose chemotherapy designed to minimize toxicity and target the tumor endothelium, causing tumor growth inhibition. Topotecan (TPT) when administered at its maximum tolerated dose (MTD) is often associated with systemic hematological toxicities. Liposomal encapsulation of TPT enhances efficacy by shielding it from systemic clearance, allowing greater uptake and extended tissue exposure in tumors. Extended release of TPT from liposomal formulations also has the potential to mimic metronomic therapies with fewer treatments. Here we investigate potential toxicities of equivalent doses of free and actively loaded liposomal TPT (LTPT) and compare them to a fractionated low dose regimen of free TPT in tumor-endothelial spheroids (TES) with/without radiation exposure for a prolonged period of 10 days. Using confocal microscopy, TPT fluorescence was monitored to determine the accumulation of drug within TES. These studies showed TES, being more reflective of the in vivo tumor microenvironment, were more sensitive to LTPT in comparison to free TPT with radiation. More importantly, the response of TES to low-dose metronomic TPT with radiation was comparable to similar treatment with LTPT. This TES study suggests nanoparticle formulations designed for extended release of drug can simulate LDMC in vivo.
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Schmitt S, Hendricks P, Weir J, Somasundaram R, Sittampalam GS, Nirmalanandhan VS. Stretching mechanotransduction from the lung to the lab: approaches and physiological relevance in drug discovery. Assay Drug Dev Technol 2012; 10:137-47. [PMID: 22352900 DOI: 10.1089/adt.2011.418] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Recent years have shown a great deal of interest and research into the understanding of the biological and physiological roles of mechanical forces on cellular behavior. Despite these reports, in vitro screening of new molecular entities for lung ailments is still performed in static cell culture models. Failure to incorporate the effects of mechanical forces during early stages of screening could significantly reduce the success rate of drug candidates in the highly expensive clinical phases of the drug discovery pipeline. The objective of this review is to expand our current understanding of lung mechanotransduction and extend its applicability to cellular physiology and new drug screening paradigms. This review covers early in vivo studies and the importance of mechanical forces in normal lung development, use of different types of bioreactors that simulate in vivo movements in a controlled in vitro cell culture environment, and recent research using dynamic cell culture models. The cells in lungs are subjected to constant stretching (mechanical forces) in regular cycles due to involuntary expansion and contraction during respiration. The effects of stretch on normal and abnormal (disease) lung cells under pathological conditions are discussed. The potential benefits of extending dynamic cell culture models (screening in the presence of forces) and the associated challenges are also discussed in this review. Based on this review, the authors advocate the development of dynamic high throughput screening models that could facilitate the rapid translation of in vitro biology to animal models and clinical efficacy. These concepts are translatable to cardiovascular, digestive, and musculoskeletal tissues and in vitro cell systems employed routinely in drug-screening applications.
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Affiliation(s)
- Sarah Schmitt
- School of Engineering, The University of Kansas, Lawrence, Kansas 66160, USA.
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Shin MS, Hong JY, Park S. Gemcitabine release behavior of polyurethane matrixes designed for local anti-cancer drug delivery via stent. J Drug Deliv Sci Technol 2012. [DOI: 10.1016/s1773-2247(12)50050-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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9
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Pinto-Leite R, Arantes-Rodrigues R, Palmeira C, Gaivão I, Cardoso ML, Colaço A, Santos L, Oliveira P. Everolimus enhances gemcitabine-induced cytotoxicity in bladder-cancer cell lines. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2012; 75:788-799. [PMID: 22788366 DOI: 10.1080/15287394.2012.690325] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The purpose of this study was to determine whether everolimus, a rapamycin derivative, might significantly enhance the cytotoxicity of gemcitabine, an antitumor drug, in two human bladder-cancer cell lines. Human bladder-cancer T24 and 5637 cells were incubated with gemcitabine and everolimus in a range of concentrations either alone or in combination for 72 h. Flow cytometry, comet assay, MTT method and optical microscopy were used to assess cell proliferation, cell cycle, DNA damage, and morphological alterations. Gemcitabine exerted an inhibitory effect on T24 and 5637 cell proliferation, in a concentration-dependent manner. Everolimus significantly reduced proliferation of 5637 bladder cancer cells (IC₃₀) at 1 μM), whereas T24 demonstrated marked resistance to everolimus treatment. A significant antiproliferative effect was obtained combining gemcitabine (100 nM) with everolimus (0.05-2 μM) with an arrest of cell cycle at S phase. Furthermore, an increase in frequency of DNA damage, apoptotic bodies, and apoptotic cells was observed when T24 and 5637 cancer cells were treated simultaneously with both drugs. Data show that in vitro combination produced a more potent antiproliferative effect when compared with single drugs.
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Affiliation(s)
- Rosário Pinto-Leite
- Genetic Service, Cytogenetic Laboratory, Hospital Center of Trás-os-Montes and Alto Douro, Vila Real, Portugal
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Benyumov A, Gurvich VJ, Lis LG, Williams BW, Kirstein MN. Combinatorial pharmacologic effects of gemcitabine and its metabolite dFdU. ChemMedChem 2011; 6:457-64. [PMID: 21280228 DOI: 10.1002/cmdc.201000447] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2010] [Revised: 12/15/2010] [Indexed: 01/01/2023]
Abstract
Recent evidence has shown that the gemcitabine metabolite, dFdU, is pharmacologically active. Though less potent, dFdU has a longer half-life and could potentiate or antagonize the activity of gemcitabine. Hence, studies were undertaken to evaluate the combined effects. Following chemical synthesis, an improved purification procedure for dFdU was developed (80 % yield; >99 % purity). Zebrafish phenotype-based embryo screens revealed no acute toxicity after gemcitabine or dFdU treatment. Only gemcitabine affected zebrafish development in a dose-dependent manner. Synergy or antagonism for the combination was not observed. Antitumor effects for dFdU were dose dependent. Antagonism was tumor cell-line dependent and did not depend on formation of the intracellular active metabolite of gemcitabine, suggesting that the drug-metabolite interaction occurs later. These studies highlight a platform for testing the pharmacologic activity for anticancer agent and metabolite combinations. Such analyses are expected to provide insight into the beneficial or harmful effect(s) of metabolites towards parent drug activity.
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Affiliation(s)
- Alexey Benyumov
- Department of Medicine, Medical School, University of Minnesota, Minneapolis, Minnesota 55414, USA
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Williams BW, Chang JJ, Chi RM, Marker PH, Frethem CD, Le CT, Kratzke RA, Kirstein MN. Cap-dependent translation blockade and fixed dose-rate gemcitabine: interaction in an in vitro bioreactor system. Cancer Lett 2009; 284:37-46. [PMID: 19442436 DOI: 10.1016/j.canlet.2009.04.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2008] [Revised: 04/02/2009] [Accepted: 04/03/2009] [Indexed: 01/13/2023]
Abstract
Translation initiation commences with the binding of eIF-4F to the mRNA 5'-end cap. eIF-4F binds the cap structure via its eIF-4E subunit, which is the rate-limiting step for the initiation of translation. This pathway can be inhibited by 4E-binding proteins (4E-BPs). The present study investigated prolonged gemcitabine infusion in combination with reduced eIF-4E function on NSCLC cell viability in an in vitro bioreactor system. To assess attachment to the hollow fibers, cells with dominant active 4E-BP1 were first analyzed by scanning electron microscopy. Cells were treated with 0.5- or 2.5h (fixed dose rate) infusion (same total dose), simulating human plasma gemcitabine concentration-time profiles. An interaction was observed between fixed dose rate infusion gemcitabine and presence of dominant active 4E-BP1. We conclude that cap-dependent translation blockade and fixed dose rate infusion gemcitabine treatment results in a significant interaction affecting cell viability in vitro.
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Affiliation(s)
- Brent W Williams
- Department of Experimental and Clinical Pharmacology, College of Pharmacy and Comprehensive Cancer Center, University of Minnesota, 717 Delaware St. SE, Minneapolis, MN 55414, USA
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Wang CX, Huang LS, Hou LB, Jiang L, Yan ZT, Wang YL, Chen ZL. Antitumor effects of polysorbate-80 coated gemcitabine polybutylcyanoacrylate nanoparticles in vitro and its pharmacodynamics in vivo on C6 glioma cells of a brain tumor model. Brain Res 2009; 1261:91-9. [DOI: 10.1016/j.brainres.2009.01.011] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2008] [Revised: 01/07/2009] [Accepted: 01/07/2009] [Indexed: 01/21/2023]
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Del Bene F, Germani M, De Nicolao G, Magni P, Re CE, Ballinari D, Rocchetti M. A model-based approach to the in vitro evaluation of anticancer activity. Cancer Chemother Pharmacol 2008; 63:827-36. [PMID: 18663447 DOI: 10.1007/s00280-008-0798-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2008] [Accepted: 07/07/2008] [Indexed: 11/24/2022]
Abstract
PURPOSE The use of in vitro screening tests for characterizing the activity of anticancer agents is a standard practice in oncology research and development. In these studies, human A2780 ovarian carcinoma cells cultured in plates are exposed to different concentrations of the compounds for different periods of time. Their anticancer activity is then quantified in terms of EC(50) comparing the number of metabolically active cells present in the treated and the control arms at specified time points. The major concern of this methodology is the observed dependency of the EC(50) on the experimental design in terms of duration of exposure. This dependency could affect the efficacy ranking of the compounds, causing possible biases especially in the screening phase, when compound selection is the primary purpose of the in vitro analysis. To overcome this problem, the applicability of a modeling approach to these in vitro studies was evaluated. METHODS The model, consisting of a system of ordinary differential equations, represents the growth of tumor cells using a few identifiable and biologically relevant parameters related to cell proliferation dynamics and drug action. In particular, the potency of the compounds can be measured by a unique and drug-specific parameter that is essentially independent of drug concentration and exposure time. Parameter values were estimated using weighted nonlinear least squares. RESULTS The model was able to adequately describe the growth of tumor cells at different experimental conditions. The approach was validated both on commercial drugs and discovery candidate compounds. In addition, from this model the relationship between EC(50) and the exposure time was derived in an analytic form. CONCLUSIONS The proposed approach provides a new tool for predicting and/or simulating cell responses to different treatments with useful indications for optimizing in vitro experimental designs. The estimated potency parameter values obtained from different compounds can be used for an immediate ranking of anticancer activity.
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Affiliation(s)
- Francesca Del Bene
- Accelera, Nerviano Medical Sciences, Via Pasteur 10, 20014, Nerviano (MI), Italy.
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Khoury H, Deroussent A, Reddy LH, Couvreur P, Vassal G, Paci A. Simultaneous determination of gemcitabine and gemcitabine-squalene by liquid chromatography–tandem mass spectrometry in human plasma. J Chromatogr B Analyt Technol Biomed Life Sci 2007; 858:71-8. [PMID: 17851141 DOI: 10.1016/j.jchromb.2007.08.018] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2007] [Revised: 07/27/2007] [Accepted: 08/10/2007] [Indexed: 10/22/2022]
Abstract
Gemcitabine-squalene is a new prodrug that self-organizes in water forming nanoassemblies. It exhibits better anti-cancer properties in vitro and in vivo than gemcitabine. A liquid chromatography/tandem mass spectrometry assay of gemcitabine-squalene and gemcitabine was developed in human plasma in order to quantitate gemcitabine and its squalene conjugate. After protein precipitation with acetonitrile/methanol (90/10, v/v), the compounds were analyzed by reversed-phase high performance liquid chromatography and detected by tandem mass spectrometry using multiple reaction monitoring. The method was linear over the concentration range of 10-10,000 ng/ml of human plasma for both compounds with an accuracy lower than 10.4% and a precision below 14.8%. The method showed a lower limit of quantitation of 10 ng/ml of human plasma for dFdC and dFdC-SQ. A preliminary in vivo study in mice was shown as application of the method as no significant difference between human and mice plasma for the analysis of dFdC and dFdC-SQ was demonstrated.
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Affiliation(s)
- Hania Khoury
- UPRES EA3535 Pharmacology and New Cancer Treatments, Institute Gustave Roussy - IFR54 and Paris XI University, 94800 Villejuif, France
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Kirstein MN, Wieman KM, Williams BW, Fisher JE, Marker PH, Le CT, Yee D, Kratzke RA. Short versus continuous gemcitabine treatment of non-small cell lung cancer in an in vitro cell culture bioreactor system. Lung Cancer 2007; 58:196-204. [PMID: 17651859 DOI: 10.1016/j.lungcan.2007.06.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2007] [Revised: 06/05/2007] [Accepted: 06/11/2007] [Indexed: 11/21/2022]
Abstract
Five-year survival for non-small cell lung cancer is 15%. Gemcitabine is a nucleoside analogue that inhibits ribonucleotide reductase and interferes with DNA replication. In this study, we sought to compare short versus continuous infusion gemcitabine in an in vitro bioreactor system using pharmacokinetic-guided dosing. Gemcitabine was infused over either 0.5 or 2.5h to produce concentration-time profiles that mimic those measured in biological samples (i.e., patient plasma). The effects of gemcitabine on the growth and survival of H2009 cells were examined using trypan blue staining, cell cycle analysis, TUNEL assay, and clonogenic assay. Data were analyzed with two ways analysis of variance. Maximum gemcitabine (Cmax) concentrations during the short infusion were 51.2+/-10.4 microM and for the continuous, 14.8+/-2.93 microM. Steady-state concentrations during the continuous infusions were 14.9+/-2.90 microM. Gemcitabine treatment resulted in a decrease for G1 fraction relative to controls. G2/M, subG1 and TUNEL were higher following gemcitabine relative to controls. Survival was approximately 20-fold higher following the short infusion compared with the continuous infusion (p = 0.0085). In conclusion, gemcitabine infused by this novel method induced apoptosis after both the short and continuous infusions, and long-term survival was significantly diminished following continuous compared with the short infusion.
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Affiliation(s)
- Mark N Kirstein
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN 55455, USA.
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