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Song P, Han X, Zheng R, Yan J, Wu X, Wang Y, Zhang H. Upregulation of MHC-I and downregulation of PD-L1 expression by doxorubicin and deferasirox codelivered liposomal nanoparticles for chemoimmunotherapy of melanoma. Int J Pharm 2022; 624:122002. [PMID: 35817272 DOI: 10.1016/j.ijpharm.2022.122002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 07/03/2022] [Accepted: 07/05/2022] [Indexed: 10/17/2022]
Abstract
Tumor immunotherapy is a promising strategy to activate the immune system and eliminate tumors. Major histocompatibility complex I (MHC-I) is usually applied to potentiate antigen presentation, but it is associated with upregulation of programmed death ligand 1 (PD-L1) expression, which is unfavorable for activation of immune responses. Moreover, poor permeability of various therapeutic antibodies results in the limited immune response rates of most patients. It is necessary to develop combined small molecule drug delivery systems for simultaneous upregulation of MHC-I expression and downregulation of PD-L1 expression, promoting effective tumor treatment. A moderate dose of doxorubicin hydrochloride (DOX) can induce upregulation of MHC-I expression, while deferasirox (DFX) can inhibit the PI3K-Akt pathway, which potentially downregulates PD-L1 expression. In the present study, we designed a pH-sensitive liposome to incorporate DOX in the hydrophilic cavity and embed DFX in the hydrophobic shell, forming a dual delivery system (DOX-DFXL). In a B16F10 melanoma-bearing mouse model, DOX and DFX were released in acidic tumor microenvironment, which further lead to enhanced antigen presentation and infiltration of T cells into tumor tissues as a result of tumor remission. This codelivery system holds great potential for clinical applications of tumor immunotherapy.
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Affiliation(s)
- Panpan Song
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, China; University of Science and Technology of China, Hefei 230026, Anhui, China
| | - Xiaoqing Han
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, China
| | - Runxiao Zheng
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, China; University of Science and Technology of China, Hefei 230026, Anhui, China
| | - Jiao Yan
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, China
| | - Xiaqing Wu
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, China; University of Science and Technology of China, Hefei 230026, Anhui, China
| | - Yanjing Wang
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, China; University of Science and Technology of China, Hefei 230026, Anhui, China
| | - Haiyuan Zhang
- Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, China; University of Science and Technology of China, Hefei 230026, Anhui, China.
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2
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Nunes SS, Miranda SEM, de Oliveira Silva J, Fernandes RS, de Alcântara Lemos J, de Aguiar Ferreira C, Townsend DM, Cassali GD, Oliveira MC, Branco de Barros AL. pH-responsive and folate-coated liposomes encapsulating irinotecan as an alternative to improve efficacy of colorectal cancer treatment. Biomed Pharmacother 2021; 144:112317. [PMID: 34634556 PMCID: PMC9052206 DOI: 10.1016/j.biopha.2021.112317] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 09/29/2021] [Accepted: 10/06/2021] [Indexed: 11/30/2022] Open
Abstract
Irinotecan (IRN) is a semisynthetic derivative of camptothecin that acts as a topoisomerase I inhibitor. IRN is used worldwide for the treatment of several types of cancer, including colorectal cancer, however its use can lead to serious adverse effects, as diarrhea and myelosuppression. Liposomes are widely used as drug delivery systems that can improve chemotherapeutic activity and decrease side effects. Liposomes can also be pH-sensitive to release its content preferentially in acidic environments, like tumors, and be surface-functionalized for targeting purposes. Herein, we developed a folate-coated pH-sensitive liposome as a drug delivery system for IRN to reach improved tumor therapy without potential adverse events. Liposomes were prepared containing IRN and characterized for particle size, polydispersity index, zeta potential, concentration, encapsulation, cellular uptake, and release profile. Antitumor activity was investigated in a murine model of colorectal cancer, and its toxicity was evaluated by hematological/biochemical tests and histological analysis of main organs. The results showed vesicles smaller than 200 nm with little dispersion, a surface charge close to neutral, and high encapsulation rate of over 90%. The system demonstrated prolonged and sustained release in pH-dependent manner with high intracellular drug delivery capacity. Importantly, the folate-coated pH-sensitive formulation had significantly better antitumor activity than the pH-dependent system only or the free drug. Tumor tissue of IRN-containing groups presented large areas of necrosis. Furthermore, no evidence of systemic toxicity was found for the groups investigated. Thus, our developed nanodrug IRN delivery system can potentially be an alternative to conventional colorectal cancer treatment.
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Affiliation(s)
- Shirleide Santos Nunes
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Sued Eustaquio Mendes Miranda
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Juliana de Oliveira Silva
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Renata Salgado Fernandes
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Janaína de Alcântara Lemos
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | | | - Danyelle M Townsend
- Department of Drug Discovery and Pharmaceutical Sciences, College of Pharmacy, Medical University of South Carolina, USA
| | - Geovanni Dantas Cassali
- Department of General Pathology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Mônica Cristina Oliveira
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - André Luís Branco de Barros
- Department of Clinical and Toxicological Analyses, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil.
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3
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Zhang S, Sun Q, Peng X, Gan N, Zhao L, Suo Z, Zhao G, Li H. A pH-sensitive T7 peptide-decorated liposome system for HER2 inhibitor extracellular delivery: an application for the efficient suppression of HER2+ breast cancer. J Mater Chem B 2021; 9:8768-8778. [PMID: 34585713 DOI: 10.1039/d1tb01619a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
HER2+ breast cancer is highly aggressive and proliferative even after multiple chemotherapy regimens. At present, the available clinical treatment duration of chemotherapeutic agents is limited by severe toxicity to noncancerous tissues, which are attributed to insufficient targeting. Here, we designed an active-targeted and pH-responsive liposome to improve the treatment. The ideas were as follows: (1) using liposome as a nano-delivery system for HER2 inhibitor (lapatinib; LAP) to reduce the toxicity; (2) modifying the capsule with T7 peptide for specific targeted delivery to the tumor cells, and (3) enabling the capsule with the pH-sensitive ability and triggering sustained drug release at extracellular weakly acidic microenvironment to emerge toxicity in tumors and to improve curative effects. It was found that T7 peptide-modified pH-sensitive liposome (T7-LP) was more effective and safer than free drug and unmodified liposome, and reduced drug-induced side effects and noncancerous toxicity. These results support the application potential of T7-LP in improving the efficacy of LAP in HER2+ breast cancer treatment. It might be a novel LAP formulation as a clinical agent.
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Affiliation(s)
- Shuangshuang Zhang
- School of Chemical Engineering, Sichuan University, Chengdu 610065, Sichuan, China.
| | - Qiaomei Sun
- School of Chemical Engineering, Sichuan University, Chengdu 610065, Sichuan, China.
| | - Xu Peng
- Laboratory Animal Center, Sichuan University, Chengdu 610065, Sichuan, China
| | - Na Gan
- School of Chemical Engineering, Sichuan University, Chengdu 610065, Sichuan, China.
| | - Ludan Zhao
- School of Chemical Engineering, Sichuan University, Chengdu 610065, Sichuan, China.
| | - Zili Suo
- School of Chemical Engineering, Sichuan University, Chengdu 610065, Sichuan, China.
| | - Gang Zhao
- School of Chemical Engineering, Sichuan University, Chengdu 610065, Sichuan, China.
| | - Hui Li
- School of Chemical Engineering, Sichuan University, Chengdu 610065, Sichuan, China.
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4
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Abri Aghdam M, Bagheri R, Mosafer J, Baradaran B, Hashemzaei M, Baghbanzadeh A, de la Guardia M, Mokhtarzadeh A. Recent advances on thermosensitive and pH-sensitive liposomes employed in controlled release. J Control Release 2019; 315:1-22. [DOI: 10.1016/j.jconrel.2019.09.018] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 09/26/2019] [Accepted: 09/27/2019] [Indexed: 12/12/2022]
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de Oliveira Silva J, Fernandes RS, Ramos Oda CM, Ferreira TH, Machado Botelho AF, Martins Melo M, de Miranda MC, Assis Gomes D, Dantas Cassali G, Townsend DM, Rubello D, Oliveira MC, de Barros ALB. Folate-coated, long-circulating and pH-sensitive liposomes enhance doxorubicin antitumor effect in a breast cancer animal model. Biomed Pharmacother 2019; 118:109323. [PMID: 31400669 PMCID: PMC7104811 DOI: 10.1016/j.biopha.2019.109323] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 07/23/2019] [Accepted: 07/26/2019] [Indexed: 11/08/2022] Open
Abstract
Long circulating pH-sensitive liposomes have been shown to effectively deliver doxorubicin (DOX) to tumors and reduce its toxic effects. Folic acid receptors are upregulated in a wide variety of solid, epithelial tumors, including breast cancer. In order to improve liposomal endocytosis and antitumor activity, folic acid has been added to nanoparticles surfaces to exploit overexpression of folate receptors in tumor cells. The purpose of this study was to evaluate the antitumor activity in vitro and in vivo of long circulating pH-sensitive folate-coated DOX-loaded liposomes (SpHL-DOX-Fol) in a 4T1 breast cancer model system in vitro and in vivo. Biodistribution studies were performed and in vivo electrocardiographic parameters were evaluated. A higher tumor uptake for radiolabeled SpHL-Fol (99mTc-SpHL-Fol) 4 h after intravenous administration was observed in comparision with non-folate-coated liposomes (99mTc-SpHL). Antitumor activity showed that SpHL-DOX-Fol treatment led to a 68% growth arrest and drastically reduce pulmonary metastasis foci. Additionally, eletrocardiographic parameters analysis revealed no dispersion in the QT and QTc interval was observed in liposomal treated mice. In summary, this novel multifunctional nanoplatform deomonstrated higher tumor uptake and antitumor activity. SpHL-DOX-Fol represents a drug delivery platform to improve DOX tumor delivery and reduce dose-limiting toxicity.
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Affiliation(s)
- Juliana de Oliveira Silva
- Department Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Renata Salgado Fernandes
- Department Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Caroline Mari Ramos Oda
- Department Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Tiago Hilário Ferreira
- Department of Clinical and Toxicological Analyses, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Ana Flávia Machado Botelho
- Department of Veterinary Medicine, School of Veterinary and Zootechny, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | - Marília Martins Melo
- Department of Veterinary Clinical and Surgery, School of Veterinary, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Marcelo Coutinho de Miranda
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Dawidson Assis Gomes
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Geovanni Dantas Cassali
- Department of General Pathology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Danyelle M Townsend
- Department of Drug Discovery and Pharmaceutical Sciences, Medical University of South Carolina, USA
| | - Domenico Rubello
- Department of Radiology, Molecular Imaging, Interventional Radiology, NeuroRadiology, Medical Physics, Pathology, Biomarkers Unit, Clinical Laboratory, Microbiology Unit, Rovigo & Adria Hospital, Rovigo, Italy
| | - Mônica Cristina Oliveira
- Department Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - André Luís Branco de Barros
- Department of Clinical and Toxicological Analyses, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
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Kang S, Park GH, Kim S, Kim J, Choi Y, Huang Y, Lee Y, Choi TH. In Vitro and In Vivo Antimicrobial Activity of Antibiotic-Conjugated Carriers with Rapid pH-Responsive Release Kinetics. Adv Healthc Mater 2019; 8:e1900247. [PMID: 31081217 DOI: 10.1002/adhm.201900247] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 04/26/2019] [Indexed: 11/06/2022]
Abstract
Two representative antibiotics, cephradine (CP) and moxifloxacin (MX), are covalently conjugated with a β-cyclodextrin (β-CD)-based carrier via pH-responsive 1-methyl-2-(2'-carboxyethyl) maleic acid amide (MCM) linkers with excellent conjugation efficiency via simple mixing. At pH 5.5, 90% and 80% of the CP and MX, respectively, are released from the carriers within 30 min, in contrast with the much-delayed release profile at pH 7.4. The in vitro inhibitory effect of β-CD-MCM-CP on the growth of Staphylococcus aureus is significantly lower than that of free CP at pH 7.4, but it reaches the level of free CP at pH 5.5. Moreover, S. aureus develops significant CP resistance after pretreatment with free CP, whereas the initial CP sensitivity is maintained after pretreatment with β-CD-MCM-CP at pH 7.4. However, β-CD-MCM-MX exhibits no such pH-responsive activity against Bacteroides fragilis, probably due to the insufficient stability of the MX conjugation at pH 7.4. In nondiabetic and diabetic mouse models, β-CD-MCM-CP significantly reduces the subcutaneous abscess scores and the bacterial counts in the abscess, although this represents only a marginal improvement in antimicrobial activity compared to free CP.
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Affiliation(s)
- Sunyoung Kang
- Department of ChemistrySeoul National University Seoul 08826 Republic of Korea
| | - Gee Ho Park
- Interdisciplinary Program in Stem Cell BiologySeoul National University Seoul 03080 Republic of Korea
| | - Seulah Kim
- Department of ChemistrySeoul National University Seoul 08826 Republic of Korea
| | - Jungah Kim
- Department of ChemistrySeoul National University Seoul 08826 Republic of Korea
| | - Yoonhwa Choi
- Department of Chemistry & EducationSeoul National University Seoul 08826 Republic of Korea
| | - Yan Huang
- Interdisciplinary Program in Stem Cell BiologySeoul National University Seoul 03080 Republic of Korea
| | - Yan Lee
- Department of ChemistrySeoul National University Seoul 08826 Republic of Korea
| | - Tae Hyun Choi
- Interdisciplinary Program in Stem Cell BiologySeoul National University Seoul 03080 Republic of Korea
- Department of Plastic and Reconstructive SurgeryInstitute of Human–Environment Interface BiologySeoul National University Seoul 03080 Republic of Korea
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7
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Tarantash M, Nosrati H, Kheiri Manjili H, Baradar Khoshfetrat A. Preparation, characterization and in vitro anticancer activity of paclitaxel conjugated magnetic nanoparticles. Drug Dev Ind Pharm 2018; 44:1895-1903. [PMID: 30073853 DOI: 10.1080/03639045.2018.1508222] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
In this study, magnetic nanoparticles (MNPs) coated with L-aspartic acid (F-Asp NPs) were synthesized through a co-precipitation method and conjugated with paclitaxel (PTX) (F-Asp-PTX NPs) by esterification reaction between the carboxylic acid end groups on MNPs surface and the hydroxyl groups of the PTX and studied its cytotoxic effect in vitro. The successful conjugating of PTX onto the nanoparticles (NPs) was confirmed by X-ray diffraction (XRD), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), fourier transform infrared spectroscopy (FTIR), vibrating sample magnetometer (VSM) and transmission electron microscopy (TEM) techniques. The results showed that the average size was 46.11 ± 7.8 (mean ± SD (n = 25)) nm. The cytotoxicity of void of PTX and F-Asp-PTX NPs were compared to each other by MTT assay of the treated MCF-7 cell line. The F-Asp-PTX NPs showed pH-dependent drug release behavior. These studies specify that F-Asp-PTX NPs have a very remarkable anticancer effect, for breast cancer cell line.
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Affiliation(s)
- Mahsa Tarantash
- a Chemical Engineering Faculty , Sahand University of Technology , Tabriz , Iran
| | - Hamed Nosrati
- b Department of Pharmaceutical Biomaterials, School of Pharmacy , Zanjan University of Medical Sciences , Zanjan , Iran
| | - Hamidreza Kheiri Manjili
- c Zanjan Pharmaceutical Nanotechnology Research Center , Zanjan University of Medical Sciences , Zanjan , Iran
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8
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de Oliveira Silva J, Miranda SEM, Leite EA, de Paula Sabino A, Borges KBG, Cardoso VN, Cassali GD, Guimarães AG, Oliveira MC, de Barros ALB. Toxicological study of a new doxorubicin-loaded pH-sensitive liposome: A preclinical approach. Toxicol Appl Pharmacol 2018; 352:162-169. [DOI: 10.1016/j.taap.2018.05.037] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 05/24/2018] [Accepted: 05/31/2018] [Indexed: 12/21/2022]
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9
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Monteiro LOF, Malachias Â, Pound-Lana G, Magalhães-Paniago R, Mosqueira VCF, Oliveira MC, de Barros ALB, Leite EA. Paclitaxel-Loaded pH-Sensitive Liposome: New Insights on Structural and Physicochemical Characterization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:5728-5737. [PMID: 29676924 DOI: 10.1021/acs.langmuir.8b00411] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
A long-circulating and pH-sensitive liposome containing paclitaxel (SpHL-PTX) was recently developed by our group. Once in an acidic environment, for example, tumors, these liposomes undergo destabilization, releasing the encapsulated drug. In this way, the aim of this study was to evaluate the molecular and supramolecular interactions between the lipid bilayer and PTX in similar biological environment conditions. High-sensitivity analyses of SpHL-PTX structures were obtained by the small-angle X-ray scattering technique combined with other techniques such as dynamic light scattering, asymmetric flow field-flow fractionation, transmission electron microscopy, and high-performance liquid chromatography. The results showed that PTX incorporation in the liposomal bilayer clearly leads to changes in supramolecular organization of dioleoylphosphatidylethanolamine (DOPE) molecules, inducing the formation of more ordered structures. Changes in supramolecular organization were observed at lower pH, indicating that pH sensitivity was preserved even in the presence of fetal bovine serum proteins. Furthermore, morphological and physicochemical characterization of SpHL-PTX evidenced the formation of nanosized dispersion suitable for intravenous administration. In conclusion, a stable nanosized dispersion of PTX was obtained at pH 7.4 with suitable parameters for intravenous administration. At lower pH conditions, the pH sensitivity of the system was clearly evidenced by changes in the supramolecular organization of DOPE molecules, which is crucial for the delivery of PTX into the cytoplasm of the targeted cells. In this way, the results obtained by different techniques confirm the feasibility of SpHL as a promising tool to PTX delivery in acidic environments, such as tumors.
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Affiliation(s)
| | | | - Gwenaelle Pound-Lana
- Laboratório de Desenvolvimento Galênico e Nanotecnologia , Universidade Federal de Ouro Preto , Campus Universitário Morro do Cruzeiro , 35400-000 Ouro Preto , Minas Gerais , Brazil
| | | | - Vanessa C F Mosqueira
- Laboratório de Desenvolvimento Galênico e Nanotecnologia , Universidade Federal de Ouro Preto , Campus Universitário Morro do Cruzeiro , 35400-000 Ouro Preto , Minas Gerais , Brazil
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10
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Novel lipids with three C18-fatty acid chains and an amino acid head group for pH-responsive and sustained antibiotic delivery. Chem Phys Lipids 2018; 212:12-25. [DOI: 10.1016/j.chemphyslip.2017.12.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 12/12/2017] [Accepted: 12/31/2017] [Indexed: 12/13/2022]
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11
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Monteiro LOF, Fernandes RS, Oda CMR, Lopes SC, Townsend DM, Cardoso VN, Oliveira MC, Leite EA, Rubello D, de Barros ALB. Paclitaxel-loaded folate-coated long circulating and pH-sensitive liposomes as a potential drug delivery system: A biodistribution study. Biomed Pharmacother 2017; 97:489-495. [PMID: 29091899 DOI: 10.1016/j.biopha.2017.10.135] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Revised: 10/18/2017] [Accepted: 10/21/2017] [Indexed: 02/07/2023] Open
Abstract
A range of antitumor agents for cancer treatment is available; however, they show low specificity, which often limit their use. Recently, we have reported the preparation of folate-coated long-circulating and pH-sensitive liposomes (SpHL-folate-PTX) loaded with paclitaxel (PTX), an effective drug for the treatment of solid tumors, including breast cancer. The purpose of this study was to prepare and characterize SpHL-PTX and SpHL-folate-PTX radiolabeled with technetium-99m (99mTc). Biodistribution studies and scintigraphic images were performed after intravenous administration of 99mTc-PTX, 99mTc-SpHL-PTX and 99mTc-SpHL-folate-PTX into healthy and tumor-bearing mice. High radiochemical purity (>98%) and in vitro stability (>90%) were achieved for both liposome formulations. The pharmacokinetic properties of 99mTc-SpHL-DTPA-PTX and 99mTc-SpHL-folate-DTPA-PTX decreased in a monophasic manner showing half-life of 400.1 and 541.8min, respectively. Scintigraphic images and biodistribution studies showed a significant uptake in liver, spleen and kidneys, demonstrating these routes as way for excretion. At 8h post-injection, the liposomal tumor uptake was higher than 99mTc-PTX. Interesting, 4h after administration, the liposome folate coated showed higher tumor-to-muscle ratio than 99mTc-SpHL-DTPA-PTX and 99mTc-PTX. In conclusion, the liposomal systems, showed high tumor uptake by scintigraphic images, especially the 99mTc-SpHL-folate-DTPA-PTX that showed a sustained and higher tumor-to-muscle ratio than non-functionalized liposome, which indicate its feasibility as a PTX delivery system to folate positive tumors.
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Affiliation(s)
- Liziane O F Monteiro
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Renata S Fernandes
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Caroline M R Oda
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Sávia C Lopes
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Danyelle M Townsend
- Department of Drug Discovery and Pharmaceutical Sciences, Medical University of South Carolina, USA
| | - Valbert N Cardoso
- Department of Clinical and Toxicological Analyses, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Mônica C Oliveira
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Elaine A Leite
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Domenico Rubello
- Department of Nuclear Medicine, Santa Maria della Misericordia Hospital, Rovigo, Italy.
| | - André L B de Barros
- Department of Clinical and Toxicological Analyses, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
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12
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Silva JO, Fernandes RS, Lopes SCA, Cardoso VN, Leite EA, Cassali GD, Marzola MC, Rubello D, Oliveira MC, de Barros ALB. pH-Sensitive, Long-Circulating Liposomes as an Alternative Tool to Deliver Doxorubicin into Tumors: a Feasibility Animal Study. Mol Imaging Biol 2017; 18:898-904. [PMID: 27172938 DOI: 10.1007/s11307-016-0964-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
PURPOSE Therapeutic agents used in chemotherapy have low specificity leading to undesired severe side effects. Hence, the development of drug delivery systems that improve drug specificity, such as liposome moieties, is an alternative to overcome chemotherapy limitations and increase antitumor efficacy. In this study, the biodistribution profile evaluation of pH-sensitive long-circulating liposomes (SpHL) containing [99mTc]DOX in 4T1 tumor-bearing BALB/c mice is described. PROCEDURES [99mTc]DOX was radiolabeled by direct method. Liposomes were prepared and characterized. [99mTc]DOX was encapsulated into liposomes by freezing and thawing. Circulation time for SpHL-[99mTc]DOX was determined by measuring the blood activity from healthy animals. Biodistribution studies were carried out in tumor-bearing mice at 1, 4, and 24 h after injection. RESULTS Blood levels of the SpHL-[99mTc]DOX declined in a biphasic manner, with an α half-life of 14.1 min and β half-life of 129.0 min. High uptake was achieved in the liver and spleen, due to the macrophages captured. Moreover, tumor uptake was higher than control tissue, resulting in high tumor-to-muscle ratios, indicating higher specificity for the tumor area. CONCLUSION [99mTc]DOX was successfully encapsulated in liposomes. Biodistribution indicated high tumor-to-muscle ratios in breast tumor-bearing BALB/c mice. In summary, these results showed the higher accumulation of SpHL-[99mTc]DOX in the tumor area, suggesting selective delivery of doxorubicin into tumor.
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Affiliation(s)
- Juliana O Silva
- Faculty of Pharmacy, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31270-901, Belo Horizonte, Minas Gerais, Brazil
| | - Renata S Fernandes
- Faculty of Pharmacy, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31270-901, Belo Horizonte, Minas Gerais, Brazil
| | - Sávia C A Lopes
- Faculty of Pharmacy, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31270-901, Belo Horizonte, Minas Gerais, Brazil
| | - Valbert N Cardoso
- Faculty of Pharmacy, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31270-901, Belo Horizonte, Minas Gerais, Brazil
| | - Elaine A Leite
- Faculty of Pharmacy, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31270-901, Belo Horizonte, Minas Gerais, Brazil
| | - Geovanni D Cassali
- Biological Science Institute, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31270-901, Belo Horizonte, Minas Gerais, Brazil
| | - Maria Cristina Marzola
- Department of Radiology, Molecular Imaging, Interventional Radiology, NeuroRadiology, Medical Physics, Pathology, Biomarkers Unit, Clinical Laboratory, Microbiology Unit, Rovigo & Adria Hospital, Rovigo, Italy
| | - Domenico Rubello
- Department of Radiology, Molecular Imaging, Interventional Radiology, NeuroRadiology, Medical Physics, Pathology, Biomarkers Unit, Clinical Laboratory, Microbiology Unit, Rovigo & Adria Hospital, Rovigo, Italy
| | - Monica C Oliveira
- Faculty of Pharmacy, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31270-901, Belo Horizonte, Minas Gerais, Brazil
| | - Andre Luis Branco de Barros
- Faculty of Pharmacy, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31270-901, Belo Horizonte, Minas Gerais, Brazil.
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Roy B, Guha P, Bhattarai R, Nahak P, Karmakar G, Chettri P, Panda AK. Influence of Lipid Composition, pH, and Temperature on Physicochemical Properties of Liposomes with Curcumin as Model Drug. J Oleo Sci 2017; 65:399-411. [PMID: 27150333 DOI: 10.5650/jos.ess15229] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The physicochemical properties of large unilamellar vesicles (LUVs) were assessed with respect to lipid composition, pH, time, and temperature by monitoring their size, zeta potential, drug payload, and thermal behavior. A conventional thin film hydration technique was employed to prepare liposomes from soy phosphatidylcholine (SPC), dipalmitoylphosphatidylcholine (DPPC), dipalmitoylphosphatidylglycerol (DPPG), and a 7:3 (M/M) mixture of DPPC+DPPG along with 30 mole% cholesterol in each combination. While the size of liposomes depended on lipid composition, pH and temperature, the zeta potential was found to be independent of the pH of the medium, although it varied with liposome type. Spherical morphology and bilayer were observed by electron microscopy. The phase transition temperature increased with decreasing pH. Membrane micro-viscosity showed the highest value for SPC, and membrane rigidity increased with increasing pH. The entrapment efficiency of liposomes with reference to curcumin was as follows: DPPC>DPPC+DPPG>DPPG>SPC. Sustained release of curcumin was observed for all liposomes. Curcumin-loaded liposomes exhibited substantial antibacterial activity against the gram-positive bacteria Bacillus amyloliquefaciens. Additional studies are needed to improve the understanding of the effect of formulation variables on the physicochemical stability of liposomes.
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Affiliation(s)
- Biplab Roy
- Department of Chemistry and Chemical Technology, Vidyasagar University
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Monteiro LO, Lopes SC, Barros ALB, Magalhães-Paniago R, Malachias Â, Oliveira MC, Leite EA. Phase behavior of dioleyphosphatidylethanolamine molecules in the presence of components of pH-sensitive liposomes and paclitaxel. Colloids Surf B Biointerfaces 2016; 144:276-283. [DOI: 10.1016/j.colsurfb.2016.04.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2016] [Revised: 03/22/2016] [Accepted: 04/07/2016] [Indexed: 11/29/2022]
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15
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Jing X, Foged C, Martin-Bertelsen B, Yaghmur A, Knapp KM, Malmsten M, Franzyk H, Nielsen HM. Delivery of siRNA Complexed with Palmitoylated α-Peptide/β-Peptoid Cell-Penetrating Peptidomimetics: Membrane Interaction and Structural Characterization of a Lipid-Based Nanocarrier System. Mol Pharm 2016; 13:1739-49. [PMID: 26654841 DOI: 10.1021/acs.molpharmaceut.5b00309] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Proteolytically stable α-peptide/β-peptoid peptidomimetics constitute promising cell-penetrating carrier candidates exhibiting superior cellular uptake as compared to commonly used cell-penetrating peptides (CPPs). The aim of the present study was to explore the potential of these peptidomimetics for delivery of small interfering RNA (siRNA) to the cytosol by incorporation of a palmitoylated peptidomimetic construct into a cationic lipid-based nanocarrier system. The optimal construct was selected on the basis of the effect of palmitoylation and the influence of the length of the peptidomimetic on the interaction with model membranes and the cellular uptake. Palmitoylation enhanced the peptidomimetic adsorption to supported lipid bilayers as studied by ellipsometry. However, both palmitoylation and increased peptidomimetic chain length were found to be beneficial in the cellular uptake studies using fluorophore-labeled analogues. Thus, the longer palmitoylated peptidomimetic was chosen for further formulation of siRNA in a dioleoylphosphatidylethanolamine/cholesteryl hemisuccinate (DOPE/CHEMS) nanocarrier system, and the resulting nanoparticles were found to mediate efficient gene silencing in vitro. Cryo-transmission electron microscopy (cryo-TEM) revealed multilamellar, onion-like spherical vesicles, and small-angle X-ray scattering (SAXS) analysis confirmed that the majority of the lipids in the nanocarriers were organized in lamellar structures, yet coexisted with a hexagonal phase, which is important for efficient nanocarrier-mediated endosomal escape of siRNA ensuring cytosolic delivery. The present work is a proof-of-concept for the use of α-peptides/β-peptoid peptidomimetics in an efficient delivery system that may be more generally exploited for the intracellular delivery of biomacromolecular drugs.
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Affiliation(s)
- Xiaona Jing
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen , Universitetsparken 2, DK-2100 Copenhagen O, Denmark
| | - Camilla Foged
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen , Universitetsparken 2, DK-2100 Copenhagen O, Denmark
| | - Birte Martin-Bertelsen
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen , Universitetsparken 2, DK-2100 Copenhagen O, Denmark
| | - Anan Yaghmur
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen , Universitetsparken 2, DK-2100 Copenhagen O, Denmark
| | - Kolja M Knapp
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen , Universitetsparken 2, DK-2100 Copenhagen O, Denmark
| | - Martin Malmsten
- Department of Pharmacy, Uppsala University , SE-751 23 Uppsala, Sweden
| | - Henrik Franzyk
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen , Universitetsparken 2, DK-2100 Copenhagen O, Denmark
| | - Hanne M Nielsen
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen , Universitetsparken 2, DK-2100 Copenhagen O, Denmark
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Tila D, Ghasemi S, Yazdani-Arazi SN, Ghanbarzadeh S. Functional liposomes in the cancer-targeted drug delivery. J Biomater Appl 2015; 30:3-16. [PMID: 25823898 DOI: 10.1177/0885328215578111] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Cancer is considered as one of the most severe health problems and is currently the third most common cause of death in the world after heart and infectious diseases. Novel therapies are constantly being discovered, developed and trialed. Many of the current anticancer agents exhibit non-ideal pharmaceutical and pharmacological properties and are distributed non-specifically throughout the body. This results in death of the both normal healthy and malignant cells and substantially leads to accruing a variety of serious toxic side effects. Therefore, the efficient systemic therapy of cancer is almost impossible due to harmful side effects of anticancer agents to the healthy organs and tissues. Furthermore, several problems such as low bioavailability of the drugs, low drug concentrations at the site of action, lack of drug specificity and drug-resistance also cause many restrictions on clinical applications of these drugs in the tumor therapy. Different types of the liposomal formulations have been used in medicine due to their distinctive advantages associated with their structural flexibility in the encapsulation of various agents with different physicochemical properties. They can also mediate delivery of the cargo to the appropriate cell type and subcellular compartment, reducing the effective dosage and possible side effects which are related to high systemic concentrations. Therefore, these novel systems were found very promising and encouraging dosage forms for the treatment of different types of cancer by increasing efficiency and reducing the systemic toxicity due to the specific drug delivery and targeting.
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Affiliation(s)
- Dena Tila
- Biotechnology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Saeed Ghasemi
- Department of Medicinal Chemistry, School of Pharmacy, Guilan University of Medical Sciences, Rasht, Iran
| | | | - Saeed Ghanbarzadeh
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran Research Center for Pharmaceutical Nanotechnology, Tabriz University of Medical Sciences, Tabriz, Iran
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Lopes SCA, Novais MVM, Ferreira DS, Braga FC, Magalhães-Paniago R, Malachias Â, Oliveira MC. Ursolic acid incorporation does not prevent the formation of a non-lamellar phase in pH-sensitive and long-circulating liposomes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:15083-90. [PMID: 25490253 DOI: 10.1021/la502977j] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Ursolic acid (UA) is a triterpene found in different plant species that has been shown to possess significant antitumor activity. However, UA presents a low water solubility, which limits its biological applications. In this context, our research group has proposed the incorporation of UA in long-circulating and pH-sensitive liposomes (SpHL-UA).These liposomes, composed of dioleylphosphatidylethanolamine (DOPE), cholesteryl hemisuccinate (CHEMS), and distearoylphosphatidylethanolamine-polyethylene glycol2000 (DSPE-PEG2000), were shown to be very promising carriers for UA. Considering that the release of UA from SpHL-UA and its antitumor activity depend upon the occurrence of the lamellar to non-lamellar phase transition of DOPE, in the present work, the interactions of UA with the components of the liposomes were evaluated, aiming to clarify their role in the structural organization of DOPE. The study was carried out by differential scanning calorimetry (DSC) and small-angle X-ray scattering (SAXS) under low hydration conditions. DSC studies revealed that DOPE phase transition temperatures did not shift significantly upon UA addition. On the other hand, in SAXS studies, a different pattern of DOPE phase organization was observed in the presence of UA, with the occurrence of the cubic phase Im3m at 20 °C and the cubic phase Pn3m at 60 °C. These findings suggest that UA interacts with the lipids and changes their self-assembly. However, these interactions between the lipids and UA were unable to eliminate the lamellar to non-lamellar phase transition, which is essential for the cytoplasmic delivery of UA molecules from SpHL-UA.
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Affiliation(s)
- Sávia C A Lopes
- Faculty of Pharmacy, and ‡Physics Department, Institute of Exact Sciences, Universidade Federal de Minas Gerais , Belo Horizonte, Minas Gerais 31270-901, Brazil
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Zhang F, Lin G, Shao W, Yu Y, Zang L. Pharmacokinetics and Tissue Distribution of Vinorelbine Bitartrate after Intraveous Administration of Liposomal and Injectable Formulations. J DISPER SCI TECHNOL 2013. [DOI: 10.1080/01932691.2012.744691] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Abstract
In recent years, liposomes have been employed with growing success as pharmaceutical carriers for antineoplastic drugs. One specific strategy used to enhance in vivo liposome-mediated drug delivery is the improvement of intracytoplasmic delivery. In this context, pH-sensitive liposomes (pHSLip) have been designed to explore the endosomal acidification process, which may lead to a destabilization of the liposomes, followed by a release of their contents into the cell cytoplasm. This review considers the current status of pHSLip development and its applicability in cancer treatment, focusing on the mechanisms of pH sensitivity and liposomal composition of pHSLip. The final section will discuss the application of these formulations in both in vitro and in vivo studies of antitumor efficacy.
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Caldeira de Araújo Lopes S, Vinícius Melo Novais M, Salviano Teixeira C, Honorato-Sampaio K, Tadeu Pereira M, Ferreira LAM, Braga FC, Cristina Oliveira M. Preparation, physicochemical characterization, and cell viability evaluation of long-circulating and pH-sensitive liposomes containing ursolic acid. BIOMED RESEARCH INTERNATIONAL 2013; 2013:467147. [PMID: 23984367 PMCID: PMC3747370 DOI: 10.1155/2013/467147] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Accepted: 07/08/2013] [Indexed: 01/11/2023]
Abstract
Cancer is one of the leading causes of death worldwide. Although several drugs are used clinically, some tumors either do not respond or are resistant to the existing pharmacotherapy, thus justifying the search for new drugs. Ursolic acid (UA) is a triterpene found in different plant species that has been shown to possess significant antitumor activity. However, UA presents a low solubility in aqueous medium, which presents a barrier to its biological applications. In this context, the use of liposomes presents a promising strategy to deliver UA and allow for its intravenous administration. In this work, long-circulating and pH-sensitive liposomes containing UA (SpHL-UA) were developed, and their chemical and physicochemical properties were evaluated. SpHL-UA presented adequate properties, including a mean diameter of 191.1 ± 6.4 nm, a zeta potential of 1.2 ± 1.4 mV, and a UA entrapment of 0.77 ± 0.01 mg/mL. Moreover, this formulation showed a good stability after having been stored for 2 months at 4 °C. The viability studies on breast (MDA-MB-231) and prostate (LNCaP) cancer cell lines demonstrated that SpHL-UA treatment significantly inhibited cancer cell proliferation. Therefore, the results of the present work suggest the applicability of SpHL-UA as a new and promising anticancer formulation.
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Affiliation(s)
- Sávia Caldeira de Araújo Lopes
- Departamento de Produtos Farmacêuticos, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Avenida Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - Marcus Vinícius Melo Novais
- Departamento de Produtos Farmacêuticos, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Avenida Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - Cláudia Salviano Teixeira
- Departamento de Produtos Farmacêuticos, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Avenida Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - Kinulpe Honorato-Sampaio
- Centro de Microscopia, Universidade Federal de Minas Gerais, Avenida Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - Márcio Tadeu Pereira
- Centro de Desenvolvimento de Tecnologia Nuclear (CDTN)/Comissão Nacional de Energia Nuclear (CNEN), Avenida Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - Lucas Antônio Miranda Ferreira
- Departamento de Produtos Farmacêuticos, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Avenida Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - Fernão Castro Braga
- Departamento de Produtos Farmacêuticos, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Avenida Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - Mônica Cristina Oliveira
- Departamento de Produtos Farmacêuticos, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Avenida Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil
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21
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Xu H, Deng YH, Wang KQ, Chen DW. Preparation and characterization of stable pH-sensitive vesicles composed of α-tocopherol hemisuccinate. AAPS PharmSciTech 2012; 13:1377-85. [PMID: 23054989 DOI: 10.1208/s12249-012-9863-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2012] [Accepted: 09/21/2012] [Indexed: 11/30/2022] Open
Abstract
The current study aims to develop a stable pH-sensitive drug delivery system. First, cleavable polyethylene glycol-α-tocopherol hemisuccinate (PEG-THS) was synthesized. Conventional pH-sensitive vesicles composed of the Tris salt of α-tocopherol hemisuccinate (THST) were then prepared using the detergent removal technique. The vesicles had a mean particle size of (163.8 ± 5.5) nm and a zeta potential of -74.5 ± 6.4 mV. The THST vesicles were then modified using PEG-THS or uncleavable PEG-cholesterol (PEG-CHOL) (THST/PEG-lipids, 100:6 molar ratio). The mean vesicle particle size and absolute zeta potential decreased with increasing PEG-THS proportion. When the pH was decreased, the vesicle particle size and calcein release rate increased. The THST vesicles were initially Ca(2+)-unstable but exhibited significantly improved stability after modification with PEG-THS, especially at PEG-lipid ratios above 6%. Incubation in an acid serum increased the calcein release rate of conventional THST vesicles to 45 ± 1.98% at 10 min. However, the release rate of the PEG-CHOL vesicles remained low. The calcein release rate of PEG-THS vesicles was between those of conventional and PEG-CHOL-V. Therefore, PEG-THS can protect vesicles in serum and reconstitute their pH sensitivity in acidic conditions. Cleavable PEG-THS can be used in stable pH-sensitive preparations without loss of pH sensitivity. Free calcein and conventional vesicles eliminated from the plasma soon after injection, as well as the half-life (t(1/2)) and area under the curve of PEG-THS-V encapsulating calcein, were dramatically increased. This phenomenon indicates that the use of PEG-lipid derivatives has gained a favorably long circulation effect in mice.
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22
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Study of the structural organization of cyclodextrin–DNA complex loaded anionic and pH-sensitive liposomes. Chem Phys Lett 2011. [DOI: 10.1016/j.cplett.2011.02.050] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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23
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Tarahovsky YS. "Smart" liposomal nanocontainers in biology and medicine. BIOCHEMISTRY (MOSCOW) 2010; 75:811-24. [PMID: 20673204 DOI: 10.1134/s0006297910070023] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The perspectives of using liposomes for delivery of drugs to desired parts of the human body have been intensively investigated for more than 30 years. During this time many inventions have been suggested and different kinds of liposomal devices developed, and a number of them have reached the stages of preclinical or clinical trials. The latest techniques can be used to develop biocompatible nano-sized liposomal containers having some abilities of artificial intellect, such as the presence of sensory and responsive units. However, only a few have been clinically approved. Further improvements in this area depend on our knowledge of the interactions of drugs with the lipid bilayer of liposomes. Further studies on liposomal transport through the human body, their targeting of cells requiring therapeutic treatment, and finally, the development of techniques for controlled drug delivery to desired acceptors on cell surfaces or in cytoplasm are still required.
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Affiliation(s)
- Y S Tarahovsky
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Moscow Region, Russia.
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24
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Aluri S, Janib SM, Mackay JA. Environmentally responsive peptides as anticancer drug carriers. Adv Drug Deliv Rev 2009; 61:940-52. [PMID: 19628014 PMCID: PMC2757494 DOI: 10.1016/j.addr.2009.07.002] [Citation(s) in RCA: 93] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2009] [Revised: 07/07/2009] [Accepted: 07/08/2009] [Indexed: 01/08/2023]
Abstract
The tumor microenvironment provides multiple cues that may be exploited to improve the efficacy of established chemotherapeutics; furthermore, polypeptides are uniquely situated to capitalize on these signals. Peptides provide: 1) a rich repertoire of biologically specific interactions to draw upon; 2) environmentally responsive phase behaviors, which may be tuned to respond to signatures of disease; 3) opportunities to direct self-assembly; 4) control over routes of biodegradation; 5) the option to seamlessly combine functionalities into a single polymer via a one-step biosynthesis. As development of cancer-targeted nanocarriers expands, peptides provide a unique source of functional units that may target disease. This review explores potential microenvironmental physiology indicative of tumors and peptides that have demonstrated an ability to target and deliver to these signals.
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Affiliation(s)
- Suhaas Aluri
- Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA, 90033-9121, USA
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Bergstrand N, Arfvidsson MC, Kim JM, Thompson DH, Edwards K. Interactions between pH-sensitive liposomes and model membranes. Biophys Chem 2003; 104:361-79. [PMID: 12834854 DOI: 10.1016/s0301-4622(03)00011-5] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The structure and dynamics of two different pH-sensitive liposome systems were investigated by means of cryo-transmission electron microscopy and different photophysical techniques. Both systems consisted of dioleoylphosphatidylethanolamine (DOPE) and contained either oleic acid (OA) or a novel acid-labile polyethylene glycol-conjugated lipid (DHCho-MPEG5000) as stabiliser. Proton induced leakage, lipid mixing and structural changes were studied in the absence and presence of EPC liposomes, as well as in the presence of liposomes designed to model the endosome membrane. Neither DHCho-MPEG5000- nor OA-stabilised liposomes showed any tendency for fusion with pure EPC liposomes or endosome-like liposomes composed of EPC/DOPE/SM/Cho (40/20/6/34 mol.%). Our investigations showed, however, that incorporation of lipids from the pH-sensitive liposomes into the endosome membrane may lead to increased permeability and formation of non-lamellar structures. Taken together the results suggest that the observed ability of DOPE-containing liposomes to mediate cytoplasmic delivery of hydrophilic molecules cannot be explained by a mechanism based on a direct, and non-leaky, fusion between the liposome and endosome membranes. A mechanism involving destabilisation of the endosome membrane due to incorporation of DOPE, seems more plausible.
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Affiliation(s)
- Nill Bergstrand
- Department of Physical Chemistry, Uppsala University, Box 579, S-751 23 Uppsala, Sweden.
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26
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Arnedo A, Espuelas S, Irache JM. Albumin nanoparticles as carriers for a phosphodiester oligonucleotide. Int J Pharm 2002; 244:59-72. [PMID: 12204565 DOI: 10.1016/s0378-5173(02)00300-9] [Citation(s) in RCA: 77] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The goal of this study was the evaluation of albumin nanoparticles as drug delivery systems for antisense oligonucleotides. Bovine serum albumin (BSA) nanoparticles were prepared by a coacervation process. A phosphodiester oligonucleotide was either incorporated into the matrix of the particles by incubation with the albumin prior the coacervation process or adsorbed onto the pre-formed nanoparticles. Incorporated and/or adsorbed oligonucleotide was estimated by capillary electrophoresis and fluorescence spectroscopy. The adsorbed amount of oligonucleotide was dramatically dependent on the pH of the medium. Desorption of the oligonucleotide was also affected by the pH and ionic strength of the medium. This indicated that electrostatic forces play a major role in the interaction between the oligonucleotide and the nanoparticles. When the oligonucleotide was incubated with the albumin prior to nanoparticle formation, the profile of release confirmed that a fraction was incorporated into the matrix and its release was controlled by the albumin degradation. The hybridisation capability of the oligonucleotide in both nanoparticle formulations was retained. However, only the oligonucleotide incorporated into the nanoparticle matrix was protected against enzymatic degradation.
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Affiliation(s)
- A Arnedo
- Departamento de Farmacia y Tecnología Farmacéutica, Centro Galénico, Universidad de Navarra, 31008 Pamplona, Spain
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Düzgünes N, Simões S, Konopka K, Rossi JJ, Pedroso de Lima MC. Delivery of novel macromolecular drugs against HIV-1. Expert Opin Biol Ther 2001; 1:949-70. [PMID: 11728227 DOI: 10.1517/14712598.1.6.949] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The development of new low molecular weight drugs against human immunodeficiency virus Type 1 (HIV-1) targets other than reverse transcriptase (RT) and protease, such as the integrase and the envelope glycoprotein, is likely to take many years. Macromolecular drugs, including antisense oligonucleotides, ribozymes, RNA decoys and transdominant mutant proteins, may be able to interfere with a relatively large number of viral targets, thereby decreasing the likelihood of the emergence of drug-resistant strains. It may also be relatively easy to alter the sequence of some of the macromolecular drugs to counter emerging drug-resistant viruses. The delivery of antisense oligonucleotides and ribozymes to HIV-1 infected or potentially infectable cells by antibody-targeted liposomes, certain cationic lipid formulations and pH-sensitive liposomes results in significant anti-HIV-1 activity. These carriers not only facilitate cytoplasmic delivery but also protect the drugs from nuclease digestion. Delivery of therapeutic genes (another form of macromolecular drug) to target cells is an important challenge of gene therapy. Following delivery by a viral vector, sufficient levels of gene expression must be maintained over an extended period of time to have therapeutic activity. Robust expression of therapeutically useful ribozymes, antisense, decoys and aptamers can be achieved by the use of Pol III expression systems. Moloney murine leukaemia virus- (MoMuLV), adeno-associated virus (AAV)-, or HIV-derived vectors expressing a variety of therapeutic genes have been used successfully to inhibit HIV-1 replication in cultured cells.
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Affiliation(s)
- N Düzgünes
- Department of Microbiology, School of Dentistry, University of the Pacific, 2155 Webster Street, San Francisco, CA 94115, USA.
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Literature Alerts. J Microencapsul 2001; 18:411-6. [PMID: 11308230 DOI: 10.1080/02652040010023366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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