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Sharma S, Mahajan SD, Chevli K, Schwartz SA, Aalinkeel R. Nanotherapeutic Approach to Delivery of Chemo- and Gene Therapy for Organ-Confined and Advanced Castration-Resistant Prostate Cancer. Crit Rev Ther Drug Carrier Syst 2023; 40:69-100. [PMID: 37075068 PMCID: PMC11007628 DOI: 10.1615/critrevtherdrugcarriersyst.2022043827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Treatments for late-stage prostate cancer (CaP) have not been very successful. Frequently, advanced CaP progresses to castration-resistant prostate cancer (CRPC), with 50#37;-70% of patients developing bone metastases. CaP with bone metastasis-associated clinical complications and treatment resistance presents major clinical challenges. Recent advances in the formulation of clinically applicable nanoparticles (NPs) have attracted attention in the fields of medicine and pharmacology with applications to cancer and infectious and neurological diseases. NPs have been rendered biocompatible, pose little to no toxicity to healthy cells and tissues, and are engineered to carry large therapeutic payloads, including chemo- and genetic therapies. Additionally, if required, targeting specificity can be achieved by chemically coupling aptamers, unique peptide ligands, or monoclonal antibodies to the surface of NPs. Encapsulating toxic drugs within NPs and delivering them specifically to their cellular targets overcomes the problem of systemic toxicity. Encapsulating highly labile genetic therapeutics such as RNA within NPs provides a protective environment for the payload during parenteral administration. The loading efficiencies of NPs have been maximized while the controlled their therapeutic cargos has been released. Theranostic ("treat and see") NPs have developed combining therapy with imaging capabilities to provide real-time, image-guided monitoring of the delivery of their therapeutic payloads. All of these NP accomplishments have been applied to the nanotherapy of late-stage CaP, offering a new opportunity for a previously dismal prognosis. This article gives an update on current developments in the use of nanotechnology for treating late-stage, castration-resistant CaP.
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Affiliation(s)
- Satish Sharma
- Department of Urology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY
| | - Supriya D. Mahajan
- Department of Medicine, Division of Allergy, Immunology and Rheumatology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY
| | - Kent Chevli
- Department of Urology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY
| | - Stanley A. Schwartz
- Department of Urology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY
- Department of Medicine, Division of Allergy, Immunology and Rheumatology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY
| | - Ravikumar Aalinkeel
- Department of Urology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY
- Department of Medicine, Division of Allergy, Immunology and Rheumatology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY
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Liang M, Guo M, Saw PE, Yao Y. Fully Natural Lecithin Encapsulated Nano-Resveratrol for Anti-Cancer Therapy. Int J Nanomedicine 2022; 17:2069-2078. [PMID: 35571257 PMCID: PMC9091702 DOI: 10.2147/ijn.s362418] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Accepted: 04/22/2022] [Indexed: 11/30/2022] Open
Abstract
Introduction Chemotherapeutics are known to have undesirable side effects (i.e. nausea, weight loss, hair loss, weakened immune system, etc.) due to the non-specificity of the drugs. Encapsulation of these chemotherapeutics inside nanoparticles significantly improves the bioavailability and half-life of drugs, while increasing their tumor penetration and localization. However, most, if not all, nanoparticles in clinics or research are synthetic, with no long-term studies on the effect of these nanoparticles in vivo. Herein, we developed a synergistic resveratrol nanoparticle system by using lecithin encapsulation. Lecithin, being a fully natural phospholipid derived from soybean, possesses inherent anti-tumor activity. Methods Lec(RSV) was successfully prepared using the nanoprecipitation method, and characterized by particle size and zeta potential analysis, and transmission electron microscopy (TEM). The in vitro cellular uptake and cytotoxic effects of Lec(RSV) were investigated in human breast cancer cell line BT474. Finally, the in vivo tumoral uptake of Lec(RSV) was carried out in the BT474 orthotopic model. Results Lec(RSV) showed a uniform distribution of ~120 nm, with prolonged stability. Lec(RSV) showed high cellular uptake and anti-cancer properties in vitro. Time-dependent uptake in the BT474 xenograft model indicated an increased tumoral uptake and apoptosis rate at 4 hours after tail vein injection of Lec(RSV). Conclusion Taken together, we successfully developed a fully natural Lec(RSV) that possesses potent anti-cancer activity in vitro, with good tumoral uptake in vivo. We hypothesize that Lec(RSV) could be a safe anti-cancer therapeutic that could be easily translated into clinical application.
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Affiliation(s)
- Meiyi Liang
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Guangdong-Hong Kong Joint Laboratory for RNA Medicine, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, People’s Republic of China
- Breast Tumor Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, People’s Republic of China
| | - Mingyan Guo
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Guangdong-Hong Kong Joint Laboratory for RNA Medicine, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, People’s Republic of China
- Department of Anesthesiology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, People’s Republic of China
| | - Phei Er Saw
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Guangdong-Hong Kong Joint Laboratory for RNA Medicine, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, People’s Republic of China
- Medical Research Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, People’s Republic of China
| | - Yandan Yao
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Guangdong-Hong Kong Joint Laboratory for RNA Medicine, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, People’s Republic of China
- Breast Tumor Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, People’s Republic of China
- Shenshan Medical Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Shanwei, 516621, People’s Republic of China
- Correspondence: Yandan Yao; Phei Er Saw, Email ;
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Xu H, Li Y, Paxton JW, Wu Z. Co-Delivery Using pH-Sensitive Liposomes to Pancreatic Cancer Cells: the Effects of Curcumin on Cellular Concentration and Pharmacokinetics of Gemcitabine. Pharm Res 2021; 38:1209-1219. [PMID: 34189639 DOI: 10.1007/s11095-021-03072-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 06/13/2021] [Indexed: 12/15/2022]
Abstract
PURPOSE PEGylated pH-sensitive liposomes (PSL) dual-loaded with gemcitabine and curcumin were investigated for the potential application in gemcitabine-resistant pancreatic ductal adenocarcinoma (PDAC) treatment. Curcumin was employed as an inhibitor of the efflux transporter, multidrug resistance protein 5 (MRP5) in PDAC cells. METHODS Liposomes were prepared with gemcitabine in the core and curcumin in the bilayers. The effects of curcumin on pH-sensitivity and 'endosome escape' of PSL with different PEGylation were investigated using a calcein self-quench assay. The effects of curcumin on intracellular gemcitabine concentrations, and cytotoxicity to a MIA PaCa-2 PDAC cell line was evaluated. The pharmacokinetics were investigated in rats following intravenous injection. RESULTS The addition of curcumin to the PSL bilayers (0.2-1 mol%)slightly decreased the pH-sensitivity of PSL, but to a less extent than PEGylation (0-5 mol%). Co-treatment with curcumin increased gemcitabine cellular accumulation in a concentration-dependent manner, and resulted in synergistic cytotoxicity towards MIA PaCa-2cells.Both these effects were augmented by the use of PSL, particularly when the two drugs were co-loaded in PSL. In rats, the dual-drug loaded PSL produced significantly reduced (p < 0.05) plasma clearance (CL) and volume of distribution (Vd) for both drugs, alongside 3 to 4-fold increases in the area-under-the-concentration-time curves compared to the free drugs. Additionally, curcumin slightly increase the plasma concentrations of gemcitabine possibly also via the MRP5 inhibition effect. CONCLUSION Co-delivery of curcumin with gemcitabine using PSL not only increased the intracellular gemcitabine concentration thus cytotoxicity to MIA PaCa-2 cells but also significantly improved the pharmacokinetic profiles for both drugs. Graphical Abstract.
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Affiliation(s)
- Hongtao Xu
- School of Pharmacy, Faculty of Medical and Health Sciences, The University of Auckland, Auckland, New Zealand
| | - Yan Li
- Department of Pharmacology, Faculty of Medical and Health Sciences, The University of Auckland, Auckland, New Zealand.,Auckland University of Technology, Auckland, New Zealand
| | - James W Paxton
- Department of Pharmacology, Faculty of Medical and Health Sciences, The University of Auckland, Auckland, New Zealand
| | - Zimei Wu
- School of Pharmacy, Faculty of Medical and Health Sciences, The University of Auckland, Auckland, New Zealand.
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Omabe K, Paris C, Lannes F, Taïeb D, Rocchi P. Nanovectorization of Prostate Cancer Treatment Strategies: A New Approach to Improved Outcomes. Pharmaceutics 2021; 13:591. [PMID: 33919150 PMCID: PMC8143094 DOI: 10.3390/pharmaceutics13050591] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 04/06/2021] [Accepted: 04/08/2021] [Indexed: 12/21/2022] Open
Abstract
Prostate cancer (PC) is the most frequent male cancer in the Western world. Progression to Castration Resistant Prostate Cancer (CRPC) is a known consequence of androgen withdrawal therapy, making CRPC an end-stage disease. Combination of cytotoxic drugs and hormonal therapy/or genotherapy is a recognized modality for the treatment of advanced PC. However, this strategy is limited by poor bio-accessibility of the chemotherapy to tumor sites, resulting in an increased rate of collateral toxicity and incidence of multidrug resistance (MDR). Nanovectorization of these strategies has evolved to an effective approach to efficacious therapeutic outcomes. It offers the possibility to consolidate their antitumor activity through enhanced specific and less toxic active or passive targeting mechanisms, as well as enabling diagnostic imaging through theranostics. While studies on nanomedicine are common in other cancer types, only a few have focused on prostate cancer. This review provides an in-depth knowledge of the principles of nanotherapeutics and nanotheranostics, and how the application of this rapidly evolving technology can clinically impact CRPC treatment. With particular reference to respective nanovectors, we draw clinical and preclinical evidence, demonstrating the potentials and prospects of homing nanovectorization into CRPC treatment strategies.
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Affiliation(s)
- Kenneth Omabe
- Centre de Recherche en Cancérologie de Marseille, CRCM, Inserm UMR1068, CNRS UMR7258, Aix-Marseille University U105, Institut Paoli-Calmettes, 13273 Marseille, France; (K.O.); (C.P.); (F.L.); (D.T.)
- Department of Biochemistry & Molecular Biology, Alex Ekwueme Federal University, Ndufu-Alike Ikwo, PMB 1010, Abakaliki 84001, Nigeria
| | - Clément Paris
- Centre de Recherche en Cancérologie de Marseille, CRCM, Inserm UMR1068, CNRS UMR7258, Aix-Marseille University U105, Institut Paoli-Calmettes, 13273 Marseille, France; (K.O.); (C.P.); (F.L.); (D.T.)
| | - François Lannes
- Centre de Recherche en Cancérologie de Marseille, CRCM, Inserm UMR1068, CNRS UMR7258, Aix-Marseille University U105, Institut Paoli-Calmettes, 13273 Marseille, France; (K.O.); (C.P.); (F.L.); (D.T.)
| | - David Taïeb
- Centre de Recherche en Cancérologie de Marseille, CRCM, Inserm UMR1068, CNRS UMR7258, Aix-Marseille University U105, Institut Paoli-Calmettes, 13273 Marseille, France; (K.O.); (C.P.); (F.L.); (D.T.)
- Biophysics and Nuclear Medicine, La Timone University Hospital, European Center for Research in Medical Imaging, Aix-Marseille University, 13005 Marseille, France
| | - Palma Rocchi
- Centre de Recherche en Cancérologie de Marseille, CRCM, Inserm UMR1068, CNRS UMR7258, Aix-Marseille University U105, Institut Paoli-Calmettes, 13273 Marseille, France; (K.O.); (C.P.); (F.L.); (D.T.)
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Hoogevest P, Tiemessen H, Metselaar JM, Drescher S, Fahr A. The Use of Phospholipids to Make Pharmaceutical Form Line Extensions. EUR J LIPID SCI TECH 2021. [DOI: 10.1002/ejlt.202000297] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Peter Hoogevest
- Phospholipid Research Center Im Neuenheimer Feld 515 Heidelberg 69120D‐69120 Germany
| | - Harry Tiemessen
- Technical & Research Development PHAD PDU Specialty Novartis Campus Physical Garden (WSJ 177) 2.14 Basel CH‐4002 Switzerland
| | - Josbert M. Metselaar
- Institute for Experimental Molecular Imaging, RWTH Aachen University Clinic Aachen D‐52074 Germany
- Institute for Biomedical Engineering, Faculty of Medicine RWTH Aachen University Aachen D‐52074 Germany
| | - Simon Drescher
- Phospholipid Research Center Im Neuenheimer Feld 515 Heidelberg D‐69120 Germany
| | - Alfred Fahr
- Professor Emeritus, Pharmaceutical Technology Friedrich‐Schiller‐University Jena Jena Germany
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Mouse-Derived Isograft (MDI) In Vivo Tumor Models I. Spontaneous sMDI Models: Characterization and Cancer Therapeutic Approaches. Cancers (Basel) 2019; 11:cancers11020244. [PMID: 30791466 PMCID: PMC6406567 DOI: 10.3390/cancers11020244] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Revised: 02/13/2019] [Accepted: 02/15/2019] [Indexed: 01/05/2023] Open
Abstract
Syngeneic in vivo tumor models are valuable for the development and investigation of immune-modulating anti-cancer drugs. In the present study, we established a novel syngeneic in vivo model type named mouse-derived isografts (MDIs). Spontaneous MDIs (sMDIs) were obtained during a long-term observation period (more than one to two years) of naïve and untreated animals of various mouse strains (C3H/HeJ, CBA/J, DBA/2N, BALB/c, and C57BL/6N). Primary tumors or suspicious tissues were assessed macroscopically and re-transplanted in a PDX-like manner as small tumor pieces into sex-matched syngeneic animals. Nine outgrowing primary tumors were histologically characterized either as adenocarcinomas, histiocytic carcinomas, or lymphomas. Growth of the tumor pieces after re-transplantation displayed model heterogeneity. The adenocarcinoma sMDI model JA-0009 was further characterized by flow cytometry, RNA-sequencing, and efficacy studies. M2 macrophages were found to be the main tumor infiltrating leukocyte population, whereas only a few T cells were observed. JA-0009 showed limited sensitivity when treated with antibodies against inhibitory checkpoint molecules (anti-mPD-1 and anti-mCTLA-4), but high sensitivity to gemcitabine treatment. The generated sMDI are spontaneously occurring tumors of low passage number, propagated as tissue pieces in mice without any tissue culturing, and thus conserving the original tumor characteristics and intratumoral immune cell populations.
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Canesin G, Evans-Axelsson S, Hellsten R, Krzyzanowska A, Prasad CP, Bjartell A, Andersson T. Treatment with the WNT5A-mimicking peptide Foxy-5 effectively reduces the metastatic spread of WNT5A-low prostate cancer cells in an orthotopic mouse model. PLoS One 2017; 12:e0184418. [PMID: 28886116 PMCID: PMC5590932 DOI: 10.1371/journal.pone.0184418] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Accepted: 08/23/2017] [Indexed: 01/10/2023] Open
Abstract
Prostate cancer patients with high WNT5A expression in their tumors have been shown to have more favorable prognosis than those with low WNT5A expression. This suggests that reconstitution of Wnt5a in low WNT5A-expressing tumors might be an attractive therapeutic approach. To explore this idea, we have in the present study used Foxy-5, a WNT5A mimicking peptide, to investigate its impact on primary tumor and metastasis in vivo and on prostate cancer cell viability, apoptosis and invasion in vitro. We used an in vivo orthotopic xenograft mouse model with metastatic luciferase-labeled WNT5A-low DU145 cells and metastatic luciferase-labeled WNT5A-high PC3prostate cancer cells. We provide here the first evidence that Foxy-5 significantly inhibits the initial metastatic dissemination of tumor cells to regional and distal lymph nodes by 90% and 75%, respectively. Importantly, this effect was seen only with the WNT5A-low DU145 cells and not with the WNT5A-high PC3 cells. The inhibiting effect in the DU145-based model occurred despite the fact that no effects were observed on primary tumor growth, apoptosis or proliferation. These findings are consistent with and supported by the in vitro data, where Foxy-5 specifically targets invasion without affecting apoptosis or viability of WNT5A-low prostate cancer cells. To conclude, our data indicate that the WNT5A-mimicking peptide Foxy-5, which has been recently used in a phase 1 clinical trial, is an attractive candidate for complimentary anti-metastatic treatment of prostate cancer patients with tumors exhibiting absent or low WNT5A expression.
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Affiliation(s)
- Giacomo Canesin
- Department of Translational Medicine, Division of Cell and Experimental Pathology, Lund University, Clinical Research Centre, Skåne University Hospital Malmö, Malmö, Sweden
- Department of Translational Medicine, Division of Urological Cancers, Lund University, Skåne University Hospital Malmö, Malmö, Sweden
| | - Susan Evans-Axelsson
- Department of Translational Medicine, Division of Urological Cancers, Lund University, Skåne University Hospital Malmö, Malmö, Sweden
| | - Rebecka Hellsten
- Department of Translational Medicine, Division of Urological Cancers, Lund University, Skåne University Hospital Malmö, Malmö, Sweden
| | - Agnieszka Krzyzanowska
- Department of Translational Medicine, Division of Urological Cancers, Lund University, Skåne University Hospital Malmö, Malmö, Sweden
| | - Chandra P. Prasad
- Department of Translational Medicine, Division of Cell and Experimental Pathology, Lund University, Clinical Research Centre, Skåne University Hospital Malmö, Malmö, Sweden
| | - Anders Bjartell
- Department of Translational Medicine, Division of Urological Cancers, Lund University, Skåne University Hospital Malmö, Malmö, Sweden
| | - Tommy Andersson
- Department of Translational Medicine, Division of Cell and Experimental Pathology, Lund University, Clinical Research Centre, Skåne University Hospital Malmö, Malmö, Sweden
- * E-mail:
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Hyper-cell-permeable micelles as a drug delivery carrier for effective cancer therapy. Biomaterials 2017; 123:118-126. [PMID: 28167390 DOI: 10.1016/j.biomaterials.2017.01.040] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Revised: 01/19/2017] [Accepted: 01/28/2017] [Indexed: 12/19/2022]
Abstract
Although PEGylated liposomes (PEG-LS) have been intensively studied as drug-delivery vehicles, the rigidity and the hydrophilic PEG corona of liposomal membranes often limits cellular uptake, resulting in insufficient drug delivery to target cells. Thus, it is necessary to develop a new type of lipid-based self-assembled nanoparticles capable of enhanced cellular uptake, tissue penetration, and drug release than conventional PEGylated liposomes. Herein, we describe a simple modification of bicellar formulation in which the addition of a PEGylated phospholipid produced a dramatic physicochemical change in morphology, i.e., the disc-shaped bicelle became a uniformly distributed ultra-small (∼12 nm) spherical micelle. The transformed lipid-based nanoparticles, which we termed hyper-cell-permeable micelles (HCPMi), demonstrated not only prolonged stability in serum but also superior cellular and tumoral uptake compared to a conventional PEGylated liposomal system (PEG-LS). In addition, HCPMi showed rapid cellular uptake and subsequent cargo release into the cytoplasm of cancer cells. Cells treated with HCPMi loaded with docetaxel (DTX) had an IC50 value of 0.16 μM, compared with 0.78 μM with PEG-LS loaded with DTX, a nearly five-fold decrease in cell viability, indicating excellent efficiency in HCPMi uptake and release. In vivo tumor imaging analysis indicated that HCPMi penetrated deep into the tumor core and achieved greater uptake than PEG-LS. Results of HCPMi (DTX) treatment of allograft and xenograft mice in vivo showed high tumoral uptake and appreciable tumor retardation, with ∼70% tumor weight reduction in the SCC-7 allograft model. Taken together, these findings indicate that HCPMi could be developed further as a highly competent lipid-based drug-delivery system.
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Chen G, Svirskis D, Wen J. Development and validation of a stability indicating isocratic HPLC method for gemcitabine with application to drug release from poly lactic-co-glycolic acid nanoparticles and enzymatic degradation studies. J Pharm Pharmacol 2015; 67:1528-36. [DOI: 10.1111/jphp.12470] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Accepted: 06/21/2015] [Indexed: 11/28/2022]
Abstract
Abstract
Objectives
Previously reported HPLC methods for gemcitabine determination are time-consuming with complicated mobile phases and gradient elution. Thus, a sensitive and stability-indicating isocratic HPLC method, which provides simple, fast and precise measurements, was developed. This method was applied to study the digestive enzymatic degradation of gemcitabine, for the first time, and the protection afforded following incorporation into poly lactic-co-glycolic acid (PLGA) nanoparticles.
Methods
An analytical HPLC method was developed with an optimized combination of operating conditions. Forced degradation and application of the method to in-vitro drug release studies were conducted. Finally, gemcitabine-loaded nanoparticles were exposed to the digestive enzymes pepsin, trypsin and α-chymotrypsin, and the resulting degradation evaluated.
Key findings
The analytical method was linear between 1 and 100 μg/ml, with excellent accuracy of 99.91–101.77% and precision of 1.71 or lower, with a 0.014 μg/ml limit of detection (LOD) and a 0.043 μg/ml limit of quantification (LOQ). Following exposure of gemcitabine to stressors, the drug was relatively stable in strong acid (1 N HCl), base (1 N NaOH) and as an aqueous solution exposed to light over 7 days, with less than 10% degradation. However, gemcitabine was more susceptible to degradation at 70°C and oxidative conditions (3% v/v H2O2) with greater than 10% degradation noted after 7 days. In-vitro drug release studies demonstrated a sustained drug release profile from PLGA nanoparticles, which also improved the resistance of gemcitabine to enzymatic degradation.
Conclusion
These results demonstrate the utility and effectiveness of this simple isocratic HPLC method in evaluating the overall performance of a gemcitabine-loaded formulation.
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Affiliation(s)
- Guanyu Chen
- School of Pharmacy, Faculty of Medical and Health Science, University of Auckland, Aukland, New Zealand
| | - Darren Svirskis
- School of Pharmacy, Faculty of Medical and Health Science, University of Auckland, Aukland, New Zealand
| | - Jingyuan Wen
- School of Pharmacy, Faculty of Medical and Health Science, University of Auckland, Aukland, New Zealand
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Raynor A, Jantscheff P, Ross T, Schlesinger M, Wilde M, Haasis S, Dreckmann T, Bendas G, Massing U. Saturated and mono-unsaturated lysophosphatidylcholine metabolism in tumour cells: a potential therapeutic target for preventing metastases. Lipids Health Dis 2015; 14:69. [PMID: 26162894 PMCID: PMC4499168 DOI: 10.1186/s12944-015-0070-x] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Accepted: 06/29/2015] [Indexed: 01/21/2023] Open
Abstract
Background Metastasis is the leading cause of mortality in malignant diseases. Patients with metastasis often show reduced Lysophosphatidylcholine (LysoPC) plasma levels and treatment of metastatic tumour cells with saturated LysoPC species reduced their metastatic potential in vivo in mouse experiments. To provide a first insight into the interplay of tumour cells and LysoPC, the interactions of ten solid epithelial tumour cell lines and six leukaemic cell lines with saturated and mono-unsaturated LysoPC species were explored. Methods LysoPC metabolism by the different tumour cells was investigated by a combination of cell culture assays, GC and MS techniques. Functional consequences of changed membrane properties were followed microscopically by detecting lateral lipid diffusion or cellular migration. Experimental metastasis studies in mice were performed after pretreatment of B16.F10 melanoma cells with LysoPC and FFA, respectively. Results In contrast to the leukaemic cells, all solid tumour cells show a very fast extracellular degradation of the LysoPC species to free fatty acids (FFA) and glycerophosphocholine. We provide evidence that the formerly LysoPC bound FFA were rapidly incorporated into the cellular phospholipids, thereby changing the FA-compositions accordingly. A massive increase of the neutral lipid amount was observed, inducing the formation of lipid droplets. Saturated LysoPC and to a lesser extent also mono-unsaturated LysoPC increased the cell membrane rigidity, which is assumed to alter cellular functions involved in metastasis. According to that, saturated and mono-unsaturated LysoPC as well as the respective FFA reduced the metastatic potential of B16.F10 cells in mice. Application of high doses of liposomes mainly consisting of saturated PC was shown to be a suitable way to strongly increase the plasma level of saturated LysoPC in mice. Conclusion These data show that solid tumours display a high activity to hydrolyse LysoPC followed by a very rapid uptake of the resulting FFA; a mechanistic model is provided. In contrast to the physiological mix of LysoPC species, saturated and mono-unsaturated LysoPC alone apparently attenuate the metastatic activity of tumours and the artificial increase of saturated and mono-unsaturated LysoPC in plasma appears as novel therapeutic approach to interfere with metastasis.
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Affiliation(s)
- Anna Raynor
- Department of Lipids & Liposomes, Tumor Biology Center, Clinical Research, Breisacher Str. 117, 79106, Freiburg, Germany.
| | | | - Thomas Ross
- Department of Pharmaceutical Chemistry, University of Bonn, An der Immenburg 4, 53121, Bonn, Germany.
| | - Martin Schlesinger
- Department of Pharmaceutical Chemistry, University of Bonn, An der Immenburg 4, 53121, Bonn, Germany.
| | - Maurice Wilde
- Department of Lipids & Liposomes, Tumor Biology Center, Clinical Research, Breisacher Str. 117, 79106, Freiburg, Germany. .,Institute for Pharmaceutical Sciences, University of Freiburg, Albertstr. 25, 79104, Freiburg, Germany.
| | - Sina Haasis
- Department of Lipids & Liposomes, Tumor Biology Center, Clinical Research, Breisacher Str. 117, 79106, Freiburg, Germany. .,Institute for Pharmaceutical Sciences, University of Freiburg, Albertstr. 25, 79104, Freiburg, Germany.
| | - Tim Dreckmann
- Department of Lipids & Liposomes, Tumor Biology Center, Clinical Research, Breisacher Str. 117, 79106, Freiburg, Germany. .,Institute for Pharmaceutical Sciences, University of Freiburg, Albertstr. 25, 79104, Freiburg, Germany.
| | - Gerd Bendas
- Department of Pharmaceutical Chemistry, University of Bonn, An der Immenburg 4, 53121, Bonn, Germany.
| | - Ulrich Massing
- Department of Lipids & Liposomes, Tumor Biology Center, Clinical Research, Breisacher Str. 117, 79106, Freiburg, Germany. .,Institute for Pharmaceutical Sciences, University of Freiburg, Albertstr. 25, 79104, Freiburg, Germany.
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Kroon J, Metselaar JM, Storm G, van der Pluijm G. Liposomal nanomedicines in the treatment of prostate cancer. Cancer Treat Rev 2014; 40:578-84. [DOI: 10.1016/j.ctrv.2013.10.005] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Revised: 10/10/2013] [Accepted: 10/16/2013] [Indexed: 12/20/2022]
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Karampelas T, Argyros O, Sayyad N, Spyridaki K, Pappas C, Morgan K, Kolios G, Millar RP, Liapakis G, Tzakos AG, Fokas D, Tamvakopoulos C. GnRH-Gemcitabine Conjugates for the Treatment of Androgen-Independent Prostate Cancer: Pharmacokinetic Enhancements Combined with Targeted Drug Delivery. Bioconjug Chem 2014; 25:813-23. [DOI: 10.1021/bc500081g] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Theodoros Karampelas
- Division
of Pharmacology-Pharmacotechnology, Biomedical Research Foundation
of the Academy of Athens, Soranou Ephessiou Street 4, Athens GR-11527, Greece
| | - Orestis Argyros
- Division
of Pharmacology-Pharmacotechnology, Biomedical Research Foundation
of the Academy of Athens, Soranou Ephessiou Street 4, Athens GR-11527, Greece
| | | | - Katerina Spyridaki
- Department
of Pharmacology, Faculty of Medicine, University of Crete, Heraklion, Crete, GR-71003, Greece
| | | | - Kevin Morgan
- Respiratory
Medicine, Castle Hill Hospital, Hull York Medical School, University of Hull, Hull, Yorkshire HU6 7RX, United Kingdom
| | - George Kolios
- Laboratory
of Pharmacology, School of Medicine, Democritus University of Thrace, Alexandroupolis, GR-68100, Greece
| | - Robert P Millar
- Mammal
Research Institute, Department of Zoology and Entomology, University of Pretoria, Pretoria 0002, South Africa
- UCT/MRC
Receptor Biology Group, Institute for Infectious Diseases and Molecular
Medicine, University of Cape Town, Rondebosch 7701, South Africa
- Centre
for Integrative Medicine, University of Edinburgh, Edinburgh EH8 9YL, Scotland
| | - George Liapakis
- Department
of Pharmacology, Faculty of Medicine, University of Crete, Heraklion, Crete, GR-71003, Greece
| | | | | | - Constantin Tamvakopoulos
- Division
of Pharmacology-Pharmacotechnology, Biomedical Research Foundation
of the Academy of Athens, Soranou Ephessiou Street 4, Athens GR-11527, Greece
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13
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Gemcitabine Treatment of Rat Soft Tissue Sarcoma with Phosphatidyldiglycerol-Based Thermosensitive Liposomes. Pharm Res 2014; 31:2276-86. [DOI: 10.1007/s11095-014-1322-6] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Accepted: 01/28/2014] [Indexed: 01/12/2023]
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14
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Mallett CL, Lim H, Thind K, Chen Y, Ribot EJ, Martinez F, Scholl TJ, Foster PJ. Longitudinal anatomical and metabolic MRI characterization of orthotopic xenograft prostate tumors in nude mice. J Magn Reson Imaging 2013; 40:848-56. [PMID: 24924594 DOI: 10.1002/jmri.24433] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2013] [Accepted: 09/01/2013] [Indexed: 01/04/2023] Open
Abstract
PURPOSE To assess anatomic and functional magnetic resonance imaging (MRI) for monitoring of tumor volume and metabolism of orthotopic xenograft prostate cancer tumors. MATERIALS AND METHODS Human-derived PC-3M cells were implanted into the prostate in 22 nude mice. Tumor volume and MRI appearance were monitored for up to 29 days. Histology was performed to detect metastases. Hyperpolarized [1-(13) C]pyruvate MRI was used to measure tumor metabolism on day 22. RESULTS Tumors were visible by MRI 9 days after tumor cell implantation. Tumor volume increased to 720 ± 190 mm(3) on day 29 of imaging. Metastasis was seen in the iliac lymph nodes at all timepoints, and in more distant lymph nodes at later timepoints, but was not detectable by MRI. Regions with low pyruvate uptake corresponded to regions with necrosis and had a higher lactate/pyruvate ratio (0.98 ± 0.4 vs. 1.6 ± 1.1). CONCLUSION MRI using the balanced steady-state free precession (bSSFP) sequence can be used to monitor tumor growth in orthotopic PC-3M tumors as early as 9 days post-injection. Hyperpolarized pyruvate MRI has potential to assess tumor metabolism and necrosis.
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Affiliation(s)
- Christiane L Mallett
- Imaging Research Laboratories, Robarts Research Institute, London, Ontario, Canada; Department of Medical Biophysics, Western University, London, Ontario, Canada
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15
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Arpicco S, Lerda C, Dalla Pozza E, Costanzo C, Tsapis N, Stella B, Donadelli M, Dando I, Fattal E, Cattel L, Palmieri M. Hyaluronic acid-coated liposomes for active targeting of gemcitabine. Eur J Pharm Biopharm 2013; 85:373-80. [PMID: 23791684 DOI: 10.1016/j.ejpb.2013.06.003] [Citation(s) in RCA: 106] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2012] [Revised: 03/26/2013] [Accepted: 06/05/2013] [Indexed: 10/26/2022]
Abstract
The aim of this work was the preparation, characterization, and preliminary evaluation of the targeting ability toward pancreatic adenocarcinoma cells of liposomes containing the gemcitabine lipophilic prodrug [4-(N)-lauroyl-gemcitabine, C12GEM]. Hyaluronic acid (HA) was selected as targeting agent since it is biodegradable, biocompatible, and can be chemically modified and its cell surface receptor CD44 is overexpressed on various tumors. For this purpose, conjugates between a phospholipid, the 1,2-dipalmitoyl-sn-glycero-3-phosphoethanolamine (DPPE), and HA of two different low molecular weights 4800 Da (12 disaccharidic units) and 12,000 Da (32 disaccharidic units), were prepared, characterized, and introduced in the liposomes during the preparation. Different liposomal formulations were prepared and their characteristics were analyzed: size, Z potential, and TEM analyses underline a difference in the HA-liposomes from the non-HA ones. In order to better understand the HA-liposome cellular localization and to evaluate their interaction with CD44 receptor, confocal microscopy studies were performed. The results demonstrate that HA facilitates the recognition of liposomes by MiaPaCa2 cells (CD44(+)) and that the uptake increases with increase in the polymer molecular weight. Finally, the cytotoxicity of the different preparations was evaluated and data show that incorporation of C12GEM increases their cytotoxic activity and that HA-liposomes inhibit cell growth more than plain liposomes. Altogether, the results demonstrate the specificity of C12GEM targeting toward CD44-overexpressing pancreatic adenocarcinoma cell line using HA as a ligand.
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Affiliation(s)
- Silvia Arpicco
- Dipartimento di Scienza e Tecnologia del Farmaco, University of Torino, Italy.
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16
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Gray SG, Baird AM, O'Kelly F, Nikolaidis G, Almgren M, Meunier A, Dockry E, Hollywood D, Ekström TJ, Perry AS, O'Byrne KJ. Gemcitabine reactivates epigenetically silenced genes and functions as a DNA methyltransferase inhibitor. Int J Mol Med 2012; 30:1505-11. [PMID: 23007409 DOI: 10.3892/ijmm.2012.1138] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2012] [Accepted: 08/06/2012] [Indexed: 11/06/2022] Open
Abstract
Gemcitabine is indicated in combination with cisplatin as first-line therapy for solid tumours including non-small cell lung cancer (NSCLC), bladder cancer and mesothelioma. Gemcitabine is an analogue of pyrimidine cytosine and functions as an anti-metabolite. Structurally, however, gemcitabine has similarities to 5-aza-2-deoxycytidine (decitabine/Dacogen®), a DNA methyltransferase inhibitor (DNMTi). NSCLC, mesothelioma and prostate cancer cell lines were treated with decitabine and gemcitabine. Reactivation of epigenetically silenced genes was examined by RT-PCR/qPCR. DNA methyltransferase activity in nuclear extracts and recombinant proteins was measured using a DNA methyl-transferase assay, and alterations in DNA methylation status were examined using methylation-specific PCR (MS-PCR) and pyrosequencing. We observe a reactivation of several epigenetically silenced genes including GSTP1, IGFBP3 and RASSF1A. Gemcitabine functionally inhibited DNA methyltransferase activity in both nuclear extracts and recombinant proteins. Gemcitabine dramatically destabilised DNMT1 protein. However, DNA CpG methylation was for the most part unaffected by gemcitabine. In conclusion, gemcitabine both inhibits and destabilises DNA methyltransferases and reactivates epigenetically silenced genes having activity equivalent to decitabine at concentrations significantly lower than those achieved in the treatment of patients with solid tumours. This property may contribute to the anticancer activity of gemcitabine.
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Affiliation(s)
- Steven G Gray
- Thoracic Oncology Research Group, Institute of Molecular Medicine, Trinity College Dublin, Dublin 2, Republic of Ireland.
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17
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Jantscheff P, Esser N, Geipel A, Woias P, Ziroli V, Goldschmidtboing F, Massing U. Metastasizing, Luciferase Transduced MAT‑Lu Rat Prostate Cancer Models: Follow up of Bolus and Metronomic Therapy with Doxorubicin as Model Drug. Cancers (Basel) 2011; 3:2679-95. [PMID: 24212827 PMCID: PMC3757437 DOI: 10.3390/cancers3022679] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2011] [Revised: 05/16/2011] [Accepted: 06/16/2011] [Indexed: 11/24/2022] Open
Abstract
The most fatal outcomes of prostate carcinoma (PCa) result from hormone-refractory variants of the tumor, especially from metastatic spread rather than from primary tumor burden. The goal of the study was to establish and apply rat MAT-Lu prostate cancer tumor models for improved non-invasive live follow up of tumor growth and metastasis by in vivo bioluminescence. We established luciferase transduced MAT-Lu rat PCa cells and studied tumor growth and metastatic processes in an ectopic as well as orthotopic setting. An intravenous bolus treatment with doxorubicin was used to demonstrate the basic applicability of in vivo imaging to follow up therapeutic intervention in these models. In vitro analysis of tissue homogenates confirmed major metastatic spread of subcutaneous tumors into the lung. Our sensitive method, however, for the first time detects metastasis also in lymph node (11/24), spleen (3/24), kidney (4/24), liver (5/24), and bone tissue (femur or spinal cord - 5/20 and 12/20, respectively). Preliminary data of orthotopic implantation (three animals) showed metastatic invasion to investigated organs in all animals but with varying preference (e.g., to lymph nodes). Intravenous bolus treatment of MAT-Lu PCa with doxorubicin reduced subcutaneous tumor growth by about 50% and the number of animals affected by metastatic lesions in lymph nodes (0/4), lung (3/6) or lumbar spine (0/2), as determined by in vivo imaging and in vitro analysis. Additionally, the possible applicability of the luciferase transduced MAT-Lu model(s) to study basic principles of metronomic therapies via jugular vein catheter, using newly established active microport pumping systems, is presented.
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Affiliation(s)
- Peter Jantscheff
- Tumour Biology Center, Clinical Research, Department Lipids & Liposomes, Breisacher Str.117, D-79106 Freiburg, Germany; E-Mails: (V.Z.); (U.M.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +49-761-206-1880; Fax: +49-761-206-261-1880
| | - Norbert Esser
- ProQinase GmbH, Breisacher Str. 117, D-79106 Freiburg, Germany; E-Mail:
| | - Andreas Geipel
- Laboratory for Design of Microsystems, Department of Microsystems Engineering (IMTEK), Georges-Köhler-Allee 106, D-79110 Freiburg, Germany; E-Mails: (A.G.); (P.W.); (F.G.)
| | - Peter Woias
- Laboratory for Design of Microsystems, Department of Microsystems Engineering (IMTEK), Georges-Köhler-Allee 106, D-79110 Freiburg, Germany; E-Mails: (A.G.); (P.W.); (F.G.)
| | - Vittorio Ziroli
- Tumour Biology Center, Clinical Research, Department Lipids & Liposomes, Breisacher Str.117, D-79106 Freiburg, Germany; E-Mails: (V.Z.); (U.M.)
| | - Frank Goldschmidtboing
- Laboratory for Design of Microsystems, Department of Microsystems Engineering (IMTEK), Georges-Köhler-Allee 106, D-79110 Freiburg, Germany; E-Mails: (A.G.); (P.W.); (F.G.)
| | - Ulrich Massing
- Tumour Biology Center, Clinical Research, Department Lipids & Liposomes, Breisacher Str.117, D-79106 Freiburg, Germany; E-Mails: (V.Z.); (U.M.)
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18
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Liposome based delivery systems in pancreatic cancer treatment: from bench to bedside. Cancer Treat Rev 2011; 37:633-42. [PMID: 21330062 DOI: 10.1016/j.ctrv.2011.01.006] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2010] [Revised: 01/15/2011] [Accepted: 01/21/2011] [Indexed: 12/12/2022]
Abstract
Despite rapid advances in cancer diagnosis and treatment, pancreatic cancer remains one of the most difficult human malignancies to be treated, with a mortality rate nearly equal to its incidence. Although gemcitabine has been established as the standard first-line treatment for advanced pancreatic cancer, gemcitabine-based combination chemotherapy showed either marginal or no improvement in survival. Developments in liposomal delivery systems have facilitated the targeting of specific agents for cancer treatment. Such systems could be developed as platforms for future multi-functional theranostic nanodevices tailor-made for the combined detection of early cancer and functional drug delivery. We systemically review liposome based drug-delivery systems, which can provide improved pharmacokinetics, reduced side effects and potentially increased tumor uptake, for pancreatic cancer therapy. Novel liposomal formulations allowing for higher tumor targeting efficiencies and used in current clinical trials to treat this challenging disease are emphasized.
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19
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Lysophosphatidylcholine Pretreatment Reduces VLA-4 and P-Selectin–Mediated B16.F10 Melanoma Cell Adhesion In vitro and Inhibits Metastasis-Like Lung Invasion In vivo. Mol Cancer Ther 2011; 10:186-97. [DOI: 10.1158/1535-7163.mct-10-0474] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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20
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Pinto AC, Moreira JN, Simões S. Liposomal imatinib-mitoxantrone combination: formulation development and therapeutic evaluation in an animal model of prostate cancer. Prostate 2011; 71:81-90. [PMID: 20607721 DOI: 10.1002/pros.21224] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND Mitoxantrone plus prednisone is a palliative treatment for hormone-refractory prostate cancer (HRPC) but without survival benefit. Imatinib has shown activity against HRPC but only in the preclinical setting. Our previous in vitro cytotoxicity screening study established that their free combination act additively to inhibit proliferation of PC-3 cells. We aim to develop a liposomal imatinib-mitoxantrone (LIM) formulation with improved in vivo therapeutic activity. METHODS Imatinib and mitoxantrone were simultaneously co-loaded into DSPC/Chol liposomes by means of a (NH4)2SO4-generated proton gradient method. The optimized formulation was characterized in terms of mean size diameter, loading parameters and drug retention in human serum. In vivo antitumor activity of developed LIM formulation was evaluated in a nude mice bearing subcutaneous PC-3 xenograft model. RESULTS LIM formulation exhibited maximal encapsulation efficiency (>95%) and enhanced drug retention for both drugs. Additionally, this LIM formulation, administered at a low mitoxantrone dose (0.5 mg/kg), showed a tumor inhibition activity (TGI = 66.7% and 4.0-fold tumor volume increase) slightly superior to that of liposomal mitoxantrone (LM) at 2 mg/kg (TGI = 53.0% and 4.2-fold volume increase). Therefore, therapeutic activity of mitoxantrone was significantly improved by co-loading with imatinib since a four times lower dose was needed to achieve an equivalent growth inhibition effect. CONCLUSIONS The loading parameters and drug retention properties of our LIM formulation, combined with its in vivo antitumor activity, make this formulation an excellent strategy to improve the therapeutic index of mitoxantrone and a promising candidate for clinical development in prostate cancer therapy.
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Affiliation(s)
- Ana Catarina Pinto
- Faculty of Pharmacy, Laboratory of Pharmaceutical Technology, University of Coimbra, Coimbra, Portugal
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21
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Pignatello R, Vicari L, Pistarà V, Musumeci T, Gulisano M, Puglisi G. Synthesis and in vitro cytotoxic activity on human anaplastic thyroid cancer cells of lipoamino acid conjugates of gemcitabine. Drug Dev Res 2010. [DOI: 10.1002/ddr.20374] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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22
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Yang K, Tang Y, Habermehl GK, Iczkowski KA. Stable alterations of CD44 isoform expression in prostate cancer cells decrease invasion and growth and alter ligand binding and chemosensitivity. BMC Cancer 2010; 10:16. [PMID: 20074368 PMCID: PMC2820461 DOI: 10.1186/1471-2407-10-16] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2009] [Accepted: 01/14/2010] [Indexed: 11/27/2022] Open
Abstract
Background Dysregulated CD44 expression characterizes most human cancers, including prostate cancer (PCa). PCa loses expression of CD44 standard (CD44s) that is present in benign epithelium, and overexpresses the novel splice variant isoform, CD44v7-10. Methods Using retroviral gene delivery to PC-3M PCa cells, we expressed luciferase-only, enforced CD44s re-expression as a fusion protein with luciferase at its C-terminus or as a protein separate from luciferase, or knocked down CD44v7-10 by RNAi. Invasion, migration, proliferation, soft agar colony formation, adhesion, Docetaxel sensitivity, and xenograft growth assays were carried out. Expression responses of merlin, a CD44 binding partner, and growth-permissive phospho-merlin, were assessed by western blot. Results Compared to luciferase-only PC-3M cells, all three treatments reduced invasion and migration. Growth and soft agar colony formation were reduced only by re-expression of CD44s as a separate or fusion protein but not CD44v7-10 RNAi. Hyaluronan and osteopontin binding were greatly strengthened by CD44s expression as a separate protein, but not a fusion protein. CD44v7-10 RNAi in PC-3M cells caused marked sensitization to Docetaxel; the two CD44s re-expression approaches caused minimal sensitization. In limited numbers of mouse subcutaneous xenografts, all three alterations produced only nonsignificant trends toward slower growth compared with luciferase-only controls. The expression of CD44s as a separate protein, but not a fusion protein, caused emergence of a strongly-expressed, hypophosphorylated species of phospho-merlin. Conclusion Stable re-expression of CD44s reduces PCa growth and invasion in vitro, and possibly in vivo, suggesting CD44 alterations have potential as gene therapy. When the C-terminus of CD44s is fused to another protein, most phenotypic effects are lessened, particularly hyaluronan adhesion. Finally, CD44v7-10, although it was not functionally significant for growth, may be a target for chemosensitization.
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Affiliation(s)
- Kui Yang
- Department of Pathology, University of Colorado Denver Health Science Center, Aurora, Colorado, USA
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23
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Jantscheff P, Ziroli V, Esser N, Graeser R, Kluth J, Sukolinskaya A, Taylor LA, Unger C, Massing U. Anti-metastatic effects of liposomal gemcitabine in a human orthotopic LNCaP prostate cancer xenograft model. Clin Exp Metastasis 2009; 26:981-92. [PMID: 19784785 DOI: 10.1007/s10585-009-9288-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2009] [Accepted: 09/14/2009] [Indexed: 12/15/2022]
Abstract
Fatal outcomes of prostate carcinoma (PCa) mostly result from metastatic spread rather than from primary tumor burden. Here, we monitored growth and metastatic spread of an orthotopic luciferase/GFP-expressing LNCaP PCa xenograft model in SCID mice by in vivo imaging and in vitro luciferase assay of tissues homogenates. Although the metastatic spread generally shows a significant correlation to primary tumor volumes, the susceptibility of various tissues to metastatic invasion was different in the number of affected animals as well as in absolute metastatic burden in the individual tissues. Using this xenograft model we showed that treatment with liposomal gemcitabine (GemLip) inhibited growth of the primary tumors (83.9 +/- 6.4%; P = 0.009) as well as metastatic burden in lymph nodes (95.6 +/- 24.0%; P = 0.047), lung (86.5 +/- 10.5%; P = 0.015), kidney (88.4 +/- 9.2%; P = 0.045) and stomach (79.5 +/- 6.6%; P = 0.036) already at very low efficient concentrations (8 mg/kg) as compared to conventional gemcitabine (360 mg/kg). Our data show that this orthotopic LNCaP xenograft PCa model seems to reflect the clinical situation characterized by the fact that at time of diagnosis, prostate neoplasms are biologically heterogeneous and thus, it is a useful model to investigate new anti-metastatic therapies.
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Affiliation(s)
- Peter Jantscheff
- Department of Clinical Research, Tumor Biology Center, Freiburg, Germany.
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