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Yang Y, Wang N, Tian X, Wang X, Yang J, Leng X, Zhang H. Synergy of Polydopamine Nanovaccine and Endostar Alginate Hydrogel for Improving Antitumor Immune Responses Against Colon Tumor. Int J Nanomedicine 2022; 17:4791-4805. [PMID: 36246936 PMCID: PMC9554921 DOI: 10.2147/ijn.s372048] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Accepted: 09/13/2022] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND Tumor immunotherapy, a novel type of therapeutic treatment, has a wide range of applications with potentially prolonged benefits. However, current immunotherapy has a low overall response rate in treating a variety of tumors. Combination of immunotherapy with other therapies can improve the therapeutic response rates. The purpose of this work was to explore the potential of anti-angiogenic treatment in combination with tumor cell lysate loaded polydopamine nanoparticle vaccine as a therapeutic strategy for colon tumor. METHODS We grafted tumor cell lysate onto polydopamine nanoparticles as nano-vaccine (TCLN) and fabricated alginate hydrogel loaded with Endostar (EH), then detected characteristics of EH and TCLN. We also estimated the cytotoxicity of EH/TCLN in vitro. In the tumor-bearing mouse model, we evaluated the antitumor effect of EH/TCLN treatment, and developed the animal survival study. After performing the EH/TCLN treatment, we also analyzed T cells and DCs using flow cytometry, and determined T cell responses and tumor microenvironmental cytokines. At last, we assessed the effect of the EH/TCLN treatment on anti-angiogenesis further. RESULTS When applied in combination with TCLN in MC-38 tumor-bearing mice, EH/TCLN significantly suppressed tumor growth with more than half of the mice showing tumor regression. In addition, EH/TCLN treatment resulted in noticeable changes in the tumor microenvironment. As compared with the control group, EH/TCLN treatment led to significantly reduced tumor angiogenesis and expression of tumor microenvironment-related cytokines (TMCs), increased proportion of CD8+ T cells in the spleen, lymph node and tumor, elevated activity of cytotoxic T lymphocytes (CTLs) and tumor cell apoptosis. CONCLUSION The present study demonstrated that the EH/TCLN treatment effectively created a favorable immune microenvironment for the induction of antitumor immunity and improved antitumor immune responses.
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Affiliation(s)
- Ying Yang
- Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin Key Laboratory of Biomaterials, Tianjin, People’s Republic of China
| | - Ning Wang
- Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, People’s Republic of China
| | - XinXin Tian
- Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin Key Laboratory of Biomaterials, Tianjin, People’s Republic of China
| | - XiaoLi Wang
- Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin Key Laboratory of Biomaterials, Tianjin, People’s Republic of China
| | - Jing Yang
- Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin Key Laboratory of Biomaterials, Tianjin, People’s Republic of China
| | - XiGang Leng
- Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin Key Laboratory of Biomaterials, Tianjin, People’s Republic of China
| | - HaiLing Zhang
- Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin Key Laboratory of Biomaterials, Tianjin, People’s Republic of China,Correspondence: HaiLing Zhang, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin Key Laboratory of Biomaterials, Tianjin, People’s Republic of China, Tel +86 22 8789 1191, Fax +86 22 8789 0153, Email
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Herrera Millar VR, Canciani B, Mangiavini L, Filipe JFS, Aidos L, Pallaoro M, Peretti GM, Pocar P, Modina SC, Di Giancamillo A. Endostatin in 3D Fibrin Hydrogel Scaffolds Promotes Chondrogenic Differentiation in Swine Neonatal Meniscal Cells. Biomedicines 2022; 10:biomedicines10102415. [PMID: 36289678 PMCID: PMC9598439 DOI: 10.3390/biomedicines10102415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 09/16/2022] [Accepted: 09/22/2022] [Indexed: 11/16/2022] Open
Abstract
The success of cell-based approaches for the treatment of cartilage or fibro-cartilaginous tissue defects requires an optimal cell source with chondrogenic differentiation ability that maintains its differentiated properties and stability following implantation. For this purpose, the aim of this study was to evaluate the use of endostatin (COL18A1), an anti-angiogenic factor, which is physiologically involved in cell differentiation during meniscus development. Swine neonatal meniscal cells not yet subjected to mechanical stimuli were extracted, cultured in fibrin hydrogel scaffolds, and treated at two different time points (T1 = 9 days and T2 = 21 days) with different concentrations of COL18A1 (10 ng/mL; 100 ng/mL; 200 ng/mL). At the end of the treatments, the scaffolds were examined through biochemical, molecular, and histochemical analyses. The results showed that the higher concentration of COL18A1 promotes a fibro-chondrogenic phenotype and improves cellularity index (DNA content, p < 0.001) and cell efficiency (GAGs/DNA ratio, p < 0.01) after 21 days. These data are supported by the molecular analysis of collagen type I (COL1A1, a marker of fibrous-like tissue, p < 0.001), collagen type II (COL2A1, a marker of cartilaginous-like tissue, p < 0.001) and SRY-Box Transcription Factor 9 (SOX9, an early marker of chondrogenicity, p < 0.001), as well as by histological analysis (Safranin-O staining), laying the foundations for future studies evaluating the involvement of 3D endostatin hydrogel scaffolds in the differentiation of avascular tissues.
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Affiliation(s)
| | - Barbara Canciani
- IRCCS Istituto Ortopedico Galeazzi, Via Riccardo Galeazzi, 4, 20161 Milano, Italy
| | - Laura Mangiavini
- Department of Biomedical Sciences for Health, University of Milan, Via Mangiagalli 31, 20133 Milan, Italy
- IRCCS Istituto Ortopedico Galeazzi, Via Riccardo Galeazzi, 4, 20161 Milano, Italy
| | - Joel Fernando Soares Filipe
- Department of Veterinary Medicine and Animal Sciences (DIVAS), University of Milan, Via dell’Università 6, 26900 Lodi, Italy
| | - Lucia Aidos
- Department of Biomedical Sciences for Health, University of Milan, Via Mangiagalli 31, 20133 Milan, Italy
| | - Margherita Pallaoro
- Department of Veterinary Medicine and Animal Sciences (DIVAS), University of Milan, Via dell’Università 6, 26900 Lodi, Italy
| | - Giuseppe Maria Peretti
- Department of Biomedical Sciences for Health, University of Milan, Via Mangiagalli 31, 20133 Milan, Italy
- IRCCS Istituto Ortopedico Galeazzi, Via Riccardo Galeazzi, 4, 20161 Milano, Italy
| | - Paola Pocar
- Department of Veterinary Medicine and Animal Sciences (DIVAS), University of Milan, Via dell’Università 6, 26900 Lodi, Italy
| | - Silvia Clotilde Modina
- Department of Veterinary Medicine and Animal Sciences (DIVAS), University of Milan, Via dell’Università 6, 26900 Lodi, Italy
| | - Alessia Di Giancamillo
- Department of Biomedical Sciences for Health, University of Milan, Via Mangiagalli 31, 20133 Milan, Italy
- Correspondence:
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Mahmoud BS, McConville C. Development and Optimization of Irinotecan-Loaded PCL Nanoparticles and Their Cytotoxicity against Primary High-Grade Glioma Cells. Pharmaceutics 2021; 13:541. [PMID: 33924355 PMCID: PMC8068837 DOI: 10.3390/pharmaceutics13040541] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 04/07/2021] [Accepted: 04/09/2021] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND High-grade gliomas (HGGs) are highly malignant tumors with a poor survival rate. The inability of free drugs to cross the blood-brain barrier and their off-target accumulation result in dose-limiting side effects. This study aimed at enhancing the encapsulation efficiency (EE) of irinotecan hydrochloride trihydrate (IRH) within polycaprolactone (PCL) nanoparticles with optimized size and charge. MATERIALS AND METHODS IRH-loaded PCL nanoparticles were formulated using either the single emulsion (O/W, W/O and O/O) or double emulsion (W/O/O and W/O/W) solvent evaporation techniques. The nanoparticles were characterized for their size, zeta potential and EE, with the optimized nanoparticles being characterized for their drug release and cytotoxicity. RESULTS The amorphization of PCL and the addition of electrolytes to the aqueous phases of the W/O/W emulsion produced spherical nanoparticles with a mean diameter of 202.1 ± 2.0 nm and an EE of 65.0%. The IRH-loaded nanoparticles exhibited zero-order release and were cytotoxic against primary HGG cells. CONCLUSION The amorphization of PCL improves its EE of hydrophilic drugs, while the addition of electrolytes to the aqueous phases of the W/O/W emulsion enhances their EE further. IRH-loaded PCL nanoparticles have the potential to deliver cytotoxic levels of IRH over a sustained period of time, enhancing the cell death of HGGs.
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Affiliation(s)
- Basant Salah Mahmoud
- College of Medical and Dental Sciences, School of Pharmacy, University of Birmingham, Birmingham B15 2TT, UK;
- Hormones Department, Medical Research Division, National Research Centre, El Buhouth St., Dokki, Cairo 12622, Egypt
| | - Christopher McConville
- College of Medical and Dental Sciences, School of Pharmacy, University of Birmingham, Birmingham B15 2TT, UK;
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Research Advances of Microencapsulation and Its Prospects in the Petroleum Industry. MATERIALS 2017; 10:ma10040369. [PMID: 28772728 PMCID: PMC5506935 DOI: 10.3390/ma10040369] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2017] [Revised: 03/13/2017] [Accepted: 03/16/2017] [Indexed: 01/20/2023]
Abstract
Additives in the petroleum industry have helped form an efficient system in the past few decades. Nowadays, the development of oil and gas has been facing more adverse conditions, and smart response microcapsules with the abilities of self-healing, and delayed and targeted release are introduced to eliminate obstacles for further exploration in the petroleum industry. However, limited information is available, only that of field measurement data, and not mechanism theory and structural innovation data. Thus we propose that the basic type, preparation, as well as mechanism of microcapsules partly depend on other mature fields. In this review, we explore the latest advancements in evaluating microcapsules, such as X-ray computed tomography (XCT), simulation, and modeling. Finally, some novel microencapsulated additives with unparalleled advantages, such as flexibility, efficiency, and energy-conservation are described.
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Wang L, Yang Q, Chen Y, Chai Y, Li JJ, Du L, Tan R, Yang S, Tu M, Yu B. A reformative shear precipitation procedure for the fabrication of vancomycin-loaded poly(lactide-co-glycolide) microspheres. J Biomater Appl 2017; 31:995-1009. [PMID: 28068861 DOI: 10.1177/0885328216689199] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
This study reports the encapsulation of vancomycin, as a model hydrophilic drug, into poly(lactide-co-glycolide) microspheres using a novel reformative shear precipitation procedure. In contrast to the external aqueous phase used in the conventional microencapsulation technique based on emulsion solvent evaporation/extraction, the reformative shear precipitation procedure explored in this study uses a shear medium composed of glycerol as the viscous medium and ethanol as polymer antisolvent, which is relatively immiscible with the hydrophilic drug. This limits drug diffusion and leads to rapid microsphere solidification, which allows a large proportion of the hydrophilic drug to be encapsulated within the microspheres. The influence of various processing parameters, including polymer concentration, volume ratio of ethanol to glycerol in the shear medium, volume of aqueous drug solution, initial drug loading, and injecting rate of the drug-polymer emulsion, on the encapsulation efficiency and characteristics of resulting microspheres were investigated. The morphology and release characteristics, as well as mechanical, in vitro and in vivo behaviour of vancomycin-loaded poly(lactide-co-glycolide) microspheres prepared using the novel procedure were also investigated. The results demonstrated that the reformative shear precipitation procedure could achieve the loading of hydrophilic drugs into poly(lactide-co-glycolide) microspheres with high encapsulation efficiency, and the success of the procedure was largely influenced by the volume ratio of ethanol to glycerol in the shear medium. Vancomycin-loaded poly(lactide-co-glycolide) microspheres prepared using this procedure demonstrated favourable mechanical characteristics, antibacterial activity, and in vivo degradation behaviour which suggested their suitability for use as a sustained delivery system.
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Affiliation(s)
- Lei Wang
- 1 Department of Orthopaedics and Traumatology, Nanfang Hospital, Southern Medical University, Guangzhou, People's Republic of China
| | - Qinmeng Yang
- 1 Department of Orthopaedics and Traumatology, Nanfang Hospital, Southern Medical University, Guangzhou, People's Republic of China
| | - Yirong Chen
- 1 Department of Orthopaedics and Traumatology, Nanfang Hospital, Southern Medical University, Guangzhou, People's Republic of China
| | - Yu Chai
- 1 Department of Orthopaedics and Traumatology, Nanfang Hospital, Southern Medical University, Guangzhou, People's Republic of China
| | - Jiao Jiao Li
- 2 Biomaterials and Tissue Engineering Research Unit, School of AMME, University of Sydney, Sydney, NSW, Australia
| | - Lin Du
- 3 Department of Materials Science and Engineering, College of Science and Engineering, Jinan University, Guangzhou, People's Republic of China
| | - Ruizhe Tan
- 3 Department of Materials Science and Engineering, College of Science and Engineering, Jinan University, Guangzhou, People's Republic of China
| | - Shenyu Yang
- 3 Department of Materials Science and Engineering, College of Science and Engineering, Jinan University, Guangzhou, People's Republic of China
| | - Mei Tu
- 3 Department of Materials Science and Engineering, College of Science and Engineering, Jinan University, Guangzhou, People's Republic of China
| | - Bin Yu
- 1 Department of Orthopaedics and Traumatology, Nanfang Hospital, Southern Medical University, Guangzhou, People's Republic of China
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Cao Y, Yang X, Wu Y, Yi J, Wu Y, Yu C, Huang Y, Bao Y, Sun L, Li Y. Dual release of angiostatin and curcumin from biodegradable PLGA microspheres inhibit Lewis lung cancer in a mice model. RSC Adv 2016. [DOI: 10.1039/c6ra23627h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Schematic illustration of the proposed structure and mechanism of anti-cancer actions of As–Cur–PLGA-Ms.
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Affiliation(s)
- Yue Cao
- National Engineering Laboratory for Druggable Gene and Protein Screening
- Northeast Normal University
- Changchun 130117
- P. R. China
| | - Xiaoguang Yang
- National Engineering Laboratory for Druggable Gene and Protein Screening
- Northeast Normal University
- Changchun 130117
- P. R. China
| | - Yannan Wu
- School of Life Sciences
- Northeast Normal University
- Changchun 130024
- P. R. China
| | - Jingwen Yi
- National Engineering Laboratory for Druggable Gene and Protein Screening
- Northeast Normal University
- Changchun 130117
- P. R. China
| | - Yin Wu
- School of Life Sciences
- Northeast Normal University
- Changchun 130024
- P. R. China
| | - Chunlei Yu
- School of Life Sciences
- Northeast Normal University
- Changchun 130024
- P. R. China
| | - Yanxin Huang
- Institute of Genetics and Cytology
- Northeast Normal University
- Changchun 130024
- P. R. China
| | - Yongli Bao
- School of Life Sciences
- Northeast Normal University
- Changchun 130024
- P. R. China
| | - Luguo Sun
- Institute of Genetics and Cytology
- Northeast Normal University
- Changchun 130024
- P. R. China
| | - Yuxin Li
- National Engineering Laboratory for Druggable Gene and Protein Screening
- Northeast Normal University
- Changchun 130117
- P. R. China
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Abstract
INTRODUCTION Proteins are effective biotherapeutics with applications in diverse ailments. Despite being specific and potent, their full clinical potential has not yet been realized. This can be attributed to short half-lives, complex structures, poor in vivo stability, low permeability, frequent parenteral administrations and poor adherence to treatment in chronic diseases. A sustained release system, providing controlled release of proteins, may overcome many of these limitations. AREAS COVERED This review focuses on recent development in approaches, especially polymer-based formulations, which can provide therapeutic levels of proteins over extended periods. Advances in particulate, gel-based formulations and novel approaches for extended protein delivery are discussed. Emphasis is placed on dosage form, method of preparation, mechanism of release and stability of biotherapeutics. EXPERT OPINION Substantial advancements have been made in the field of extended protein delivery via various polymer-based formulations over last decade despite the unique delivery-related challenges posed by protein biologics. A number of injectable sustained-release formulations have reached market. However, therapeutic application of proteins is still hampered by delivery-related issues. A large number of protein molecules are under clinical trials, and hence, there is an urgent need to develop new methods to deliver these highly potent biologics.
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Affiliation(s)
- Ravi Vaishya
- University of Missouri-Kansas City, Pharmaceutical Sciences , Kansas City, MO , USA
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Yang T, Nyiawung D, Silber A, Hao J, Lai L, Bai S. Comparative studies on chitosan and polylactic-co-glycolic acid incorporated nanoparticles of low molecular weight heparin. AAPS PharmSciTech 2012; 13:1309-18. [PMID: 23054983 DOI: 10.1208/s12249-012-9854-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2012] [Accepted: 09/10/2012] [Indexed: 11/30/2022] Open
Abstract
This study was performed to test the feasibility of chitosan and polylactic-co-glycolic acid (PLGA) incorporated nanoparticles as sustained-release carriers for the delivery of negatively charged low molecular weight heparin (LMWH). Fourier transform infrared (FTIR) spectrometry was used to evaluate the interactions between chitosan and LMWH. The shifts, intensity, and broadening of the characteristic peaks for the functional groups in the FTIR spectra indicated that strong interactions occur between the positively charged chitosans and the negatively charged LMWHs. Three types of LMWH nanoparticles (NP-1, NP-2, and NP-3) were prepared using chitosan with or without PLGA: NP-1 nanoparticles were formed by polyelectrolyte complexation after single mixing, NP-2 nanoparticles were prepared by polyelectrolyte complexation after single emulsion-diffusion-evaporation, and NP-3 nanoparticles were optimized by double emulsion-diffusion-evaporation. NP-3 nanoparticles of LMWH prepared by the emulsion-diffusion-evaporation method showed significant differences in particle morphology, size, zeta potential, and drug release profile compared to NP-1 nanoparticles formed by polyelectrolyte complexation. Another ionic complex of LMWH with chitosan-incorporated PLGA nanoparticles (NP-2) showed lower drug entrapment efficiency than that of NP-1 and NP-3. The drug release rate of NP-3 was slower than the release rates of NP-1 and NP-2, although particle morphology of NP-3 was similar to that of NP-2. Cell viability was not adversely affected when cells were treated with all three types of nanoparticles. The data presented in this study demonstrate that nanoparticles formulated with chitosan-PLGA could be a safe sustained-release carrier for the delivery of LMWH.
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Giri TK, Choudhary C, Ajazuddin, Alexander A, Badwaik H, Tripathi DK. Prospects of pharmaceuticals and biopharmaceuticals loaded microparticles prepared by double emulsion technique for controlled delivery. Saudi Pharm J 2012; 21:125-41. [PMID: 23960828 DOI: 10.1016/j.jsps.2012.05.009] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Accepted: 05/18/2012] [Indexed: 10/28/2022] Open
Abstract
Several methods and techniques are potentially useful for the preparation of microparticles in the field of controlled drug delivery. The type and the size of the microparticles, the entrapment, release characteristics and stability of drug in microparticles in the formulations are dependent on the method used. One of the most common methods of preparing microparticles is the single emulsion technique. Poorly soluble, lipophilic drugs are successfully retained within the microparticles prepared by this method. However, the encapsulation of highly water soluble compounds including protein and peptides presents formidable challenges to the researchers. The successful encapsulation of such compounds requires high drug loading in the microparticles, prevention of protein and peptide degradation by the encapsulation method involved and predictable release, both rate and extent, of the drug compound from the microparticles. The above mentioned problems can be overcome by using the double emulsion technique, alternatively called as multiple emulsion technique. Aiming to achieve this various techniques have been examined to prepare stable formulations utilizing w/o/w, s/o/w, w/o/o, and s/o/o type double emulsion methods. This article reviews the current state of the art in double emulsion based technologies for the preparation of microparticles including the investigation of various classes of substances that are pharmaceutically and biopharmaceutically active.
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Affiliation(s)
- Tapan Kumar Giri
- Rungta College of Pharmaceutical Sciences and Research, Kohka Road, Kurud, Bhilai 490024, India
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Wu L, Wu J, Zhou Y, Tang X, Du Y, Hu Y. Enhanced antitumor efficacy of cisplatin by tirapazamine-transferrin conjugate. Int J Pharm 2012; 431:190-6. [PMID: 22531857 DOI: 10.1016/j.ijpharm.2012.04.032] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2011] [Revised: 03/31/2012] [Accepted: 04/09/2012] [Indexed: 10/28/2022]
Abstract
Combination of tirapazamine (TPZ) with cisplatin has been studied extensively in clinical trial for tumor therapy. However, in phase III clinical trial, the combination therapy did not show overall survival improvement in patients. To decrease the side effects and increase the efficacy of the combination therapy, TPZ was conjugated with transferrin (Tf-G-TPZ) for targeted delivery and co-administered with cisplatin. In vitro toxicity study showed that the combination of Tf-G-TPZ with cisplatin induced substantially higher cytotoxicity of tumor cells than the combination of TPZ and cisplatin. After Tf-G-TPZ was intravenously injected into tumor-bearing mice, its total accumulation in tumor was 2.3 fold higher than that of the unmodified TPZ, suggesting transferrin-mediated target delivery of TPZ into the tumor tissue. With the increased accumulation of Tf-G-TPZ in tumor, the synergistic anti-tumor effects of Tf-G-TPZ and cisplatin were also enhanced as showed by the 53% tumor inhibition rate. Meanwhile, the side effects such as body weight lost were not significantly increased. Therefore, Tf-G-TPZ holds great promise to a better substitute for TPZ in the combination therapy with cisplatin.
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Affiliation(s)
- Lin Wu
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, 22 Hankou Road, Nanjing 210093, China
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Chen W, Hu S. Suitable carriers for encapsulation and distribution of endostar: comparison of endostar-loaded particulate carriers. Int J Nanomedicine 2011; 6:1535-41. [PMID: 21845043 PMCID: PMC3152471 DOI: 10.2147/ijn.s21881] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Background Particulate carriers are necessary to control the release of endostar and prolong its circulation in vivo. The purpose of this study was to identify a suitable carrier for the capsulation and delivery of endostar. Methods We prepared a series of poly (DL-lactide-co-glycolide) (PLGA) and poly (ethylene glycol) (PEG)-modified PLGA (PEG-PLGA) particulate carriers, and then characterized them according to their ability to prolong the circulation of endostar, their physicochemical properties, endostar-loading content, and in vitro and in vivo particulate carrier release profiles. Results All the particulate carriers had spherical core shell structures. The PEG-PLGA material and nanosize range appeared to enable the carriers to encapsulate more endostar, release endostar faster in vitro, and accumulate more endostar in vivo. The drug loading capacity of PEG-PLGA and PLGA nanoparticles was 8.03% ± 3.41% and 3.27% ± 5.26%, respectively, and for PEG-PLGA and PLGA microspheres was 15.32% ± 5.61% and 9.21% ± 4.73%. The cumulative amount of endostar released from the carriers in phosphate-buffered saline over 21 days was 23.79%, 20.45%, 15.13%, and 10.41%, respectively. Moreover, the terminal elimination half-life of endostar in the rabbit was 26.91 ± 7.93 hours and 9.32 ± 5.53 hours in the PEG-PLGA group and the PLGA nanoparticle group. Peak endostar concentration was reached at day 7 in the group treated with subcutaneous injection of PEG-PLGA microspheres and at day 14 in the group receiving subcutaneous injection of PLGA microspheres. Endostar was detectable in vivo in both groups after injection of the particulate carriers. Conclusion PEG-PLGA nanoparticles might be better than other nanoparticulate carriers for encapsulation and distribution of endostar.
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Affiliation(s)
- Weijie Chen
- Department of General Surgery, Qilu Hospital of Shandong University, Jinan, Shandong Province, People's Republic of China
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