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Theoretical analysis of the structural and electronic properties of the interaction of boron nitride diamantane nanocrystal with the drug hydroxyurea as an anticancer drug. J Mol Model 2021; 27:90. [PMID: 33611723 DOI: 10.1007/s00894-021-04711-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Accepted: 02/10/2021] [Indexed: 10/22/2022]
Abstract
The density functional theory calculations with hybrid B3LYP/6-31G(d,p) basis sets have been used to examine the structural and electronic properties of boron nitride (BN) diamantane interacted with the drug hydroxyurea (HU) as an anticancer drug. The findings have been shown that there is a decrease in the total energy after combining the drug with diamantane. The energy levels of HOMO and LUMO analyses indicate that the value of HOMO energy increased slightly, while the value of LUMO energy decreased significantly in these systems in the HU/BN diamantane. In addition, the decreasing of the energy gap between HOMO and LUMO confirms a strong bond between the drug hydroxyurea and BN diamantane. Finally, the drug's stability and reactivity with BN diamantane were investigated by measuring chemical reaction characteristics such as chemical potential, electron affinity, global hardness, and electrophilicity index. As a result, the nanocrystal of BN diamantane can be considered a vector for the delivery of anticancer drugs within biological systems.
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Galvão AM, Galvão JS, Pereira MA, Cadena PG, Magalhães NSS, Fink JB, de Andrade AD, Castro CMMBD, de Sousa Maia MB. Cationic liposomes containing antioxidants reduces pulmonary injury in experimental model of sepsis: Liposomes antioxidants reduces pulmonary damage. Respir Physiol Neurobiol 2016; 231:55-62. [PMID: 27267466 DOI: 10.1016/j.resp.2016.06.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 05/17/2016] [Accepted: 06/01/2016] [Indexed: 01/04/2023]
Abstract
The intracellular redox state of alveolar cells is a determining factor for tolerance to oxidative and pro-inflammatory stresses. This study investigated the effects of intratracheal co-administration of antioxidants encapsulated in liposomes on the lungs of rats subjected to sepsis. For this, male rats subjected to sepsis induced by lipopolysaccharide from Escherichia coli or placebo operation were treated (intratracheally) with antibiotic, 0.9% saline and antioxidants encapsulated or non-encapsulated in liposomes. Experimental model of sepsis by cecal ligation and puncture (CLP) was performed in order to expose the cecum. The cecum was then gently squeezed to extrude a small amount of feces from the perforation site. As an index of oxidative damage, superoxide anions, lipid peroxidation, protein carbonyls, catalase activity, nitrates/nitrites, cell viability and mortality rate were measured. Infected animals treated with antibiotic plus antioxidants encapsulated in liposomes showed reduced levels of superoxide anion (54% or 7.650±1.263 nmol/min/mg protein), lipid peroxidation (33% or 0.117±0.041 nmol/mg protein), protein carbonyl (57% or 0.039 ± 0.022 nmol/mg protein) and mortality rate (3.3%), p value <0.001. This treatment also reduced the level of nitrite/nitrate and increased cell viability (90.7%) of alveolar macrophages. Taken togheter, theses results support that cationic liposomes containing antioxidants should be explored as coadjuvants in the treatment of pulmonary oxidative damage.
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Affiliation(s)
- Andre Martins Galvão
- Department of Microbiology and Cell Culture, Laboratory of Immunopathology Keizo Asami - LIKA, Av. Prof. Moraes Rego, 1235, Cidade Universitária, CEP: 50780-901, Recife, Pernambuco, Brazil.
| | - Júlia Siqueira Galvão
- Department of Microbiology and Cell Culture, Laboratory of Immunopathology Keizo Asami - LIKA, Av. Prof. Moraes Rego, 1235, Cidade Universitária, CEP: 50780-901, Recife, Pernambuco, Brazil
| | - Marcela Araújo Pereira
- Graduate Program in Biology Apllied to Health Sciences, Laboratory of Immunopathology Keizo Asami - LIKA, Av. Prof. Moraes Rego, 1235, Cidade Universitária, CEP: 50780-901, Recife, Pernambuco, Brazil
| | - Pabyton Gonçalves Cadena
- Department of Morphology and Physiology, Federal Rural University of Pernambuco - UFRPE, Av. Rua Dom Manoel de Medeiros, s/n, Dois Irmãos, CEP: 52171-900, Recife, Pernambuco, Brazil
| | - Nereide Stella Santos Magalhães
- Department of Nanobiotechnology, Laboratory of Immunopathology Keizo Asami - LIKA, Av. Prof. Moraes Rego, 1235, Cidade Universitária, CEP: 50780-901, Recife, Pernambuco, Brazil
| | - James B Fink
- Division of Respiratory Therapy, Georgia State University, Atlanta, GA 30302, USA
| | - Armele Dornelas de Andrade
- Department of Physiotherapy, Federal University of Pernambuco - UFPE, Av. Prof. Moraes Rego, 1235, Cidade Universitária, CEP: 50780-901, Recife, Pernambuco, Brazil
| | - Celia Maria Machado Barbosa de Castro
- Department of Microbiology and Cell Culture, Laboratory of Immunopathology Keizo Asami - LIKA, Av. Prof. Moraes Rego, 1235, Cidade Universitária, CEP: 50780-901, Recife, Pernambuco, Brazil
| | - Maria Bernadete de Sousa Maia
- Department of Pharmacology and Physiology, Federal University of Pernambuco - UFPE, Av. Prof. Moraes Rego, 1235, Cidade Universitária, CEP: 50780-901, Recife, Pernambuco, Brazil
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Alipour M, Mitsopoulos P, Smith MG, Bolger G, Pucaj K, Suntres ZE. Safety and pharmacokinetic studies of liposomal antioxidant formulations containing N-acetylcysteine,α-tocopherol orγ-tocopherol in beagle dogs. Toxicol Mech Methods 2013; 23:419-31. [DOI: 10.3109/15376516.2013.774079] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Alipour M, Buonocore C, Omri A, Szabo M, Pucaj K, Suntres ZE. Therapeutic effect of liposomal-N-acetylcysteine against acetaminophen-induced hepatotoxicity. J Drug Target 2013; 21:466-73. [PMID: 23600745 DOI: 10.3109/1061186x.2013.765443] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND Acetaminophen (APAP) is an antipyretic analgesic drug that when taken in overdose causes depletion of glutathione (GSH) and hepatotoxicity. N-acetylcysteine (NAC) is the antidote of choice for the treatment of APAP toxicity; however, due to its short-half-life repeated dosing of NAC is required. PURPOSE To determine whether a NAC-loaded liposomal formulation (Lipo-NAC) is more effective than the conventional NAC in protecting against acute APAP-induced hepatotoxicity. METHODS Male Sprague-Dawley rats were challenged with an intragastric dose of APAP (850 mg/kg b.wt.); 4 h later, animals were administered saline, NAC, Lipo-NAC or empty liposomes and sacrificed 24 h post-APAP treatment. RESULTS APAP administration resulted in hepatic injury as evidenced by increases in plasma bilirubin, alanine (AST) and aspartate (ALT) aminotransferase levels and tissue levels of lipid peroxidation and myeloperoxidase as well as decreases in hepatic levels of reduced GSH, GSH peroxidase and GSH reductase. Treatment of animals with Lipo-NAC was significantly more effective than free NAC in reducing APAP-induced hepatotoxicity. Histological evaluation showed that APAP caused periacinar hepatocellular apoptosis and/or necrosis of hepatocytes around the terminal hepatic venules which was reduced by NAC treatment, the degree of reduction being greater for Lipo-NAC. CONCLUSION These data suggest that administration of Lipo-NAC ameliorated the APAP-induced hepatotoxicity.
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Affiliation(s)
- Misagh Alipour
- Medical Sciences Division, Northern Ontario School of Medicine, Lakehead University, Thunder Bay, ON P7B 5E1, Canada
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Kübart SA, Keck CM. Laser diffractometry of nanoparticles: frequent pitfalls & overlooked opportunities. ACTA ACUST UNITED AC 2013. [DOI: 10.7243/2050-120x-2-17] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Law SL, Huang KJ, Chou VH, Cherng JY. Enhancement of nasal absorption of calcitonin loaded in liposomes. J Liposome Res 2012; 11:165-74. [PMID: 19530931 DOI: 10.1081/lpr-100108460] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Intranasal administration of calcitonin-containing liposomes in rabbits was investigated to evaluate the in vivo calcitonin absorption performance. Plasma calcitonin concentrations and calcium levels were measured and pharmacokinetic parameters were calculated. The bioavailability of calcitonin resulted from the intranasal delivery formulations demonstrated an order of calcitonin-containing positively charged liposomes > calcitonin-containing negatively charged liposomes > calcitonin solution. The significant enhancement of bioavailability of calcitonin for positively charged liposomes may be due to the charge interaction of positively charged liposomes with the negatively charged mucosa surface. Marked accumulation of positively charged liposomes was found on the negatively charged nasal mucosa surface. The retention of positively charged liposomes on the nasal mucosa resulted in an increase of residence time with high local concentration of calcitonin for increase of absorption.
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Affiliation(s)
- S L Law
- Department of Medical Research and Education, Veterans General Hospital-Taipei, Shih-Pai Rd, Taipei, 11217, Taiwan ROC
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Alipour M, Smith MG, Pucaj K, Suntres ZE. Acute toxicity study of liposomal antioxidant formulations containing N-acetylcysteine, α-tocopherol, and γ-tocopherol in rats. J Liposome Res 2012; 22:158-67. [DOI: 10.3109/08982104.2012.662654] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Urbán P, Estelrich J, Adeva A, Cortés A, Fernàndez-Busquets X. Study of the efficacy of antimalarial drugs delivered inside targeted immunoliposomal nanovectors. NANOSCALE RESEARCH LETTERS 2011; 6:620. [PMID: 22151840 PMCID: PMC3285703 DOI: 10.1186/1556-276x-6-620] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2011] [Accepted: 12/07/2011] [Indexed: 05/24/2023]
Abstract
Paul Ehrlich's dream of a 'magic bullet' that would specifically destroy invading microbes is now a major aspect of clinical medicine. However, a century later, the implementation of this medical holy grail continues being a challenge in three main fronts: identifying the right molecular or cellular targets for a particular disease, having a drug that is effective against it, and finding a strategy for the efficient delivery of sufficient amounts of the drug in an active state exclusively to the selected targets. In a previous work, we engineered an immunoliposomal nanovector for the targeted delivery of its contents exclusively to Plasmodium falciparum-infected red blood cells [pRBCs]. In preliminary assays, the antimalarial drug chloroquine showed improved efficacy when delivered inside immunoliposomes targeted with the pRBC-specific monoclonal antibody BM1234. Because difficulties in determining the exact concentration of the drug due to its low amounts prevented an accurate estimation of the nanovector performance, here, we have developed an HPLC-based method for the precise determination of the concentrations in the liposomal preparations of chloroquine and of a second antimalarial drug, fosmidomycin. The results obtained indicate that immunoliposome encapsulation of chloroquine and fosmidomycin improves by tenfold the efficacy of antimalarial drugs. The targeting antibody used binds preferentially to pRBCs containing late maturation stages of the parasite. In accordance with this observation, the best performing immunoliposomes are those added to Plasmodium cultures having a larger number of late form-containing pRBCs. An average of five antibody molecules per liposome significantly improves in cell cultures the performance of immunoliposomes over non-functionalized liposomes as drug delivery vessels. Increasing the number of antibodies on the liposome surface correspondingly increases performance, with a reduction of 50% parasitemia achieved with immunoliposomes encapsulating 4 nM chloroquine and bearing an estimated 250 BM1234 units. The nanovector prototype described here can be a valuable platform amenable to modification and improvement with the objective of designing a nanostructure adequate to enter the preclinical pipeline as a new antimalarial therapy.
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Affiliation(s)
- Patricia Urbán
- Nanobioengineering Group, Institute for Bioengineering of Catalonia, Baldiri Reixac 10-12, Barcelona, E08028, Spain
- Nanoscience and Nanotechnology Institute (IN2UB), University of Barcelona (UB), Martí i Franquès 1, Barcelona, E08028, Spain
- Barcelona Centre for International Health Research (CRESIB), Hospital Clínic-Universitat de Barcelona, Rosselló 132, Barcelona, E08036, Spain
| | - Joan Estelrich
- Nanoscience and Nanotechnology Institute (IN2UB), University of Barcelona (UB), Martí i Franquès 1, Barcelona, E08028, Spain
- Departament de Fisicoquímica, Facultat de Farmàcia, University of Barcelona, Av. Joan XXIII, s/n, Barcelona, E08028, Spain
| | - Alberto Adeva
- Scientific and Technological Centres, University of Barcelona, Baldiri Reixac 10-12, Barcelona, E08028, Spain
| | - Alfred Cortés
- Barcelona Centre for International Health Research (CRESIB), Hospital Clínic-Universitat de Barcelona, Rosselló 132, Barcelona, E08036, Spain
- Institute for Research in Biomedicine, Barcelona Science Park, Baldiri Reixac 10-12, Barcelona, E08028, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys 23, Barcelona, E08018, Spain
| | - Xavier Fernàndez-Busquets
- Nanobioengineering Group, Institute for Bioengineering of Catalonia, Baldiri Reixac 10-12, Barcelona, E08028, Spain
- Nanoscience and Nanotechnology Institute (IN2UB), University of Barcelona (UB), Martí i Franquès 1, Barcelona, E08028, Spain
- Barcelona Centre for International Health Research (CRESIB), Hospital Clínic-Universitat de Barcelona, Rosselló 132, Barcelona, E08036, Spain
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Liposomal Antioxidants for Protection against Oxidant-Induced Damage. J Toxicol 2011; 2011:152474. [PMID: 21876690 PMCID: PMC3157762 DOI: 10.1155/2011/152474] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2010] [Revised: 04/13/2011] [Accepted: 05/24/2011] [Indexed: 12/26/2022] Open
Abstract
Reactive oxygen species (ROS), including superoxide anion, hydrogen peroxide, and hydroxyl radical, can be formed as normal products of aerobic metabolism and can be produced at elevated rates under pathophysiological conditions. Overproduction and/or insufficient removal of ROS result in significant damage to cell structure and functions. In vitro studies showed that antioxidants, when applied directly and at relatively high concentrations to cellular systems, are effective in conferring protection against the damaging actions of ROS, but results from animal and human studies showed that several antioxidants provide only modest benefit and even possible harm. Antioxidants have yet to be rendered into reliable and safe therapies because of their poor solubility, inability to cross membrane barriers, extensive first-pass metabolism, and rapid clearance from cells. There is considerable interest towards the development of drug-delivery systems that would result in the selective delivery of antioxidants to tissues in sufficient concentrations to ameliorate oxidant-induced tissue injuries. Liposomes are biocompatible, biodegradable, and nontoxic artificial phospholipid vesicles that offer the possibility of carrying hydrophilic, hydrophobic, and amphiphilic molecules. This paper focus on the use of liposomes for the delivery of antioxidants in the prevention or treatment of pathological conditions related to oxidative stress.
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Müller RH, Gohla S, Keck CM. State of the art of nanocrystals – Special features, production, nanotoxicology aspects and intracellular delivery. Eur J Pharm Biopharm 2011; 78:1-9. [DOI: 10.1016/j.ejpb.2011.01.007] [Citation(s) in RCA: 472] [Impact Index Per Article: 36.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2010] [Revised: 12/23/2010] [Accepted: 01/17/2011] [Indexed: 11/26/2022]
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Urbán P, Estelrich J, Cortés A, Fernàndez-Busquets X. A nanovector with complete discrimination for targeted delivery to Plasmodium falciparum-infected versus non-infected red blood cells in vitro. J Control Release 2011; 151:202-11. [PMID: 21223986 DOI: 10.1016/j.jconrel.2011.01.001] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2010] [Revised: 12/22/2010] [Accepted: 01/04/2011] [Indexed: 12/22/2022]
Abstract
Current administration methods of antimalarial drugs deliver the free compound in the blood stream, where it can be unspecifically taken up by all cells, and not only by Plasmodium-infected red blood cells (pRBCs). Nanosized carriers have been receiving special attention with the aim of minimizing the side effects of malaria therapy by increasing drug bioavailability and selectivity. Liposome encapsulation has been assayed for the delivery of compounds against murine malaria, but there is a lack of cellular studies on the performance of targeted liposomes in specific cell recognition and on the efficacy of cargo delivery, and very little data on liposome-driven antimalarial drug targeting to human-infecting parasites. We have used fluorescence microscopy to assess in vitro the efficiency of liposomal nanocarriers for the targeted delivery of their contents to pRBCs. 200-nm liposomes loaded with quantum dots were covalently functionalized with oriented, specific half-antibodies against P. falciparum late form-infected pRBCs. In less than 90min, liposomes dock to pRBC plasma membranes and release their cargo to the cell. 100.0% of late form-containing pRBCs and 0.0% of non-infected RBCs in P. falciparum cultures are recognized and permeated by the content of targeted immunoliposomes. Liposomes not functionalized with antibodies are also specifically directed to pRBCs, although with less affinity than immunoliposomes. In preliminary assays, the antimalarial drug chloroquine at a concentration of 2nM, ≥10 times below its IC(50) in solution, cleared 26.7±1.8% of pRBCs when delivered inside targeted immunoliposomes.
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Affiliation(s)
- Patricia Urbán
- Nanobioengineering Group, Institute for Bioengineering of Catalonia, Baldiri Reixac 10-12, Barcelona, Spain
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Jonkman-De Vries JD, Flora KP, Bult A, Beijnen JH. Pharmaceutical Development of (Investigational) Anticancer Agents for Parenteral Use-A Review. Drug Dev Ind Pharm 2008. [DOI: 10.3109/03639049609108353] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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13
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Crommelin DJ, Grit M, Talsma H, Zuidam NJ. Liposomes as Carriers for Drugs and Antigens: Approaches to Preserve Their Long Term Stability. Drug Dev Ind Pharm 2008. [DOI: 10.3109/03639049409038317] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Bergers JJ, Bloois LV, Barenholz Y, Crommelin DJ. Conformational Changes of Myoglobin Upon Interaction with Negatively-Charged Phospholipid Vesicles. J Liposome Res 2008. [DOI: 10.3109/08982109509018632] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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15
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Storm G, Koppenhagen FJ, Heeremans AL, Vingerhoeds MH, Woodle MC, Crommelin DJ. Liposomal Delivery of Peptides and Proteins. J Liposome Res 2008. [DOI: 10.3109/08982109509010237] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Literature Alerts. J Microencapsul 2008. [DOI: 10.3109/02652049209021229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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17
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Literature Alerts. J Microencapsul 2008. [DOI: 10.3109/02652049209021254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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van Slooten ML, Storm G, Zoephel A, Küpcü Z, Boerman O, Crommelin DJ, Wagner E, Kircheis R. Liposomes containing interferon-gamma as adjuvant in tumor cell vaccines. Pharm Res 2000; 17:42-8. [PMID: 10714607 DOI: 10.1023/a:1007514424253] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
PURPOSE Liposomal systems may be useful as a cytokine supplement in tumor cell vaccines by providing a cytokine reservoir at the antigen presentation site. Here, we examined the effect of liposome incorporation of mIFNgamma on its potency as adjuvant in an established tumor cell vaccination protocol in the murine B16 melanoma model. Adjuvanticity of the mIFNgamma-liposomes was compared to that achieved by mIFNgamma-gene transfection of the B16 tumor cells. Furthermore, we studied whether liposomal incorporation of mIFNgamma indeed increases the residence time of the cytokine at the vaccination site. METHODS C57B1/6 mice were immunized with i) irradiated IFNgamma-gene transfected B16 melanoma cells or ii) irradiated wild type B16 cells supplemented with (liposomal) mIFNgamma, followed by a challenge with viable B16 cells. The residence time of the (liposomal) cytokine at the subcutaneous (s.c.) vaccination site was monitored using radiolabeled mIFNgamma and liposomes. RESULTS Immunization with irradiated tumor cells admixed with liposomal mIFNgamma generated comparable protection against B16 challenge as immunization with mIFNgamma-gene modified tumor cells. Irradiated tumor cells admixed with soluble mIFNgamma did not generate any protective responses. Radiolabeling studies indicated that free mIFNgamma rapidly cleared from the s.c. injection site. Association of [125I]-mIFNgamma with liposomes increased the local residence time substantially: liposomal association of mIFNgamma resulted in a prolonged local residence time of the cytokine as reflected by a 4-fold increase of the area under the curve. The amount of released cytokine in the optimal dose range corresponds to the amount released by the gene-transfected cells. Moderate but significant CTL-activity against B16 cells was found for mice immunized with irradiated cells supplemented with mIFNgamma-liposomes compared to untreated control animals. CONCLUSIONS Prolonged presence of mIFNgamma at the site of antigen presentation is crucial for the generation of systemic immune responses in the B16 melanoma model. These studies show that liposomal encapsulation of cytokines is an attractive strategy for paracrine cytokine delivery in tumor vaccine development.
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Affiliation(s)
- M L van Slooten
- Department of Pharmaceutics, Faculty of Pharmacy, Utrecht University, The Netherlands.
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t Hart BA, Elferink DG, Drijfhout JW, Storm G, van Blooijs L, Bontrop RE, de Vries RR. Liposome-mediated peptide loading of MHC-DR molecules in vivo. FEBS Lett 1997; 409:91-5. [PMID: 9199510 DOI: 10.1016/s0014-5793(97)00493-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Amino acid residues 3-15 of mycobacterial HSP60 define a dominant T-cell epitope for HLA-DR3+ve humans and Mamu-DR3+ve rhesus monkeys. Our results show that Mamu-DR3 molecules on PBMC can be efficiently loaded in vivo with the above-mentioned peptides when they are intravenously injected encapsulated in liposomes, but not in the free form. Mamu-DR3 loading is abolished by encapsulation of a nonstimulatory peptide. These results have implications for the delivery of therapeutic peptides in vivo.
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Affiliation(s)
- B A t Hart
- Department of Immunobiology, Biomedical Primate Research Centre, Rijswijk, The Netherlands.
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Coradini D, Biffi A, Costa A, Pellizzaro C, Pirronello E, Fronzo G. Effect of sodium butyrate on human breast cancer cell lines. Cell Prolif 1997. [DOI: 10.1111/j.1365-2184.1997.tb00931.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Affiliation(s)
- D. Coradini
- Oncologia Sperimentale C, Istituto Nazionale per lo Studio e la Cura dei Tumori, Milan, Italy
| | - A. Biffi
- Oncologia Sperimentale C, Istituto Nazionale per lo Studio e la Cura dei Tumori, Milan, Italy
| | - A. Costa
- Oncologia Sperimentale C, Istituto Nazionale per lo Studio e la Cura dei Tumori, Milan, Italy
| | - C. Pellizzaro
- Oncologia Sperimentale C, Istituto Nazionale per lo Studio e la Cura dei Tumori, Milan, Italy
| | - E. Pirronello
- Oncologia Sperimentale C, Istituto Nazionale per lo Studio e la Cura dei Tumori, Milan, Italy
| | - G. Fronzo
- Oncologia Sperimentale C, Istituto Nazionale per lo Studio e la Cura dei Tumori, Milan, Italy
- Centro per lo Studio delta Patologia Cellulare, CNR, Milan, Italy
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Abstract
The potential and limitations of targeted delivery of anticancer agents with colloidal particulate carriers is the subject of this contribution. Because over the years liposomes have gained the most attention as carrier system in the category of colloidal carrier systems, this paper focuses on the utility of the liposomal system for tumor targeting. It is imperative that an intended therapeutic application of liposomes should be well matched with the liposome behavior in vivo. Therefore, the in vivo fate of the first-generation liposomes and the more recently developed second-generation liposomes (surface-modified liposomes such as the immunoliposomes and long-circulating liposomes) is analyzed in terms of accessibility of target sites, time-, and site-controlled drug release and potential target sites for rational targeted delivery are discussed. A few examples of areas in cancer chemotherapy, with a strong rationale for the use of liposomes, are given. It is concluded that, although several options are available on the drawing board, issues such as tumor cell heterogeneity, access to the target site, shedding of antigens, and target site-specific release of the liposome-associated drug need to be addressed early in the development process.
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Affiliation(s)
- G Storm
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, The Netherlands
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Machluf M, Regev O, Peled Y, Kost J, Cohen S. Characterization of microencapsulated liposome systems for the controlled delivery of liposome-associated macromolecules. J Control Release 1997. [DOI: 10.1016/s0168-3659(96)01466-6] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Zuidam NJ, Gouw HK, Barenholz Y, Crommelin DJ. Physical (in) stability of liposomes upon chemical hydrolysis: the role of lysophospholipids and fatty acids. BIOCHIMICA ET BIOPHYSICA ACTA 1995; 1240:101-10. [PMID: 7495841 DOI: 10.1016/0005-2736(95)00180-5] [Citation(s) in RCA: 76] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
As a consequence of chemical hydrolysis of liposomal phospholipids the organization of the lipid assembly can change from a lamellar into a micellar system. Different approaches provided evidence for this conversion: 31P-NMR analysis, turbidity measurements and ultracentrifugation experiments. Two conditions have to be met before this conversion can take place: (1) the liposomes must pass through a gel-to-liquid crystalline phase-transition during a heating or cooling run, and (2) the degree of chemical hydrolysis must exceed a critical hydrolysis percentage (or the phospholipid bilayer must contain critical amounts of lysophospholipid and fatty acid). As monitored by turbidity measurements, this critical level of hydrolysis and the relative change depended on the chain length and on the head group of the liposomal phospholipids. It does not depend on concentration, pH, storage temperature or on size of the liposomes within the experimental range. Addition of cholesterol to bilayers composed of dipalmitoylphosphatidylcholine prevents the lamellar to micellar transformation. Fluorescence anisotropy measurements of the lipophilic probe 1,6-diphenyl-1,3,5-hexatriene in 0.18-microns dipalmitoylphosphatidylcholine/dipalmitoylphosphatidylglycerol (10:1)-liposomes indicated that behavior of the probe below and above the phase-transition temperature was not affected by chemical hydrolysis, or even by formation of micelles. However, the phase-transition temperature range broadened and shifted towards higher temperatures upon hydrolysis.
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Affiliation(s)
- N J Zuidam
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Faculty of Pharmacy, Utrecht University, The Netherlands
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25
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Menger FM, Gabrielson KD. Die cytomimetische organische Chemie — ein erster Bericht. Angew Chem Int Ed Engl 1995. [DOI: 10.1002/ange.19951071905] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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26
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Daemen T, Hoedemakers R, Storm G, Scherphof GL. Opportunities in targeted drug delivery to Kupffer cells: delivery of immunomodulators to Kupffer cells-activation of tumoricidal properties. Adv Drug Deliv Rev 1995. [DOI: 10.1016/0169-409x(95)00038-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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27
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Storm G, Koppenhagen F, Heeremans A, Vingerhoeds M, Woodle MC, Crommelin DJ. Novel developments in liposomal delivery of peptides and proteins. J Control Release 1995. [DOI: 10.1016/0168-3659(95)00047-c] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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28
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Kersten GF, Crommelin DJ. Liposomes and ISCOMS as vaccine formulations. BIOCHIMICA ET BIOPHYSICA ACTA 1995; 1241:117-38. [PMID: 7640293 DOI: 10.1016/0304-4157(95)00002-9] [Citation(s) in RCA: 95] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- G F Kersten
- Institute of Public Health and Environmental Protection, Department of Product and Process Development, Bilthoven, The Netherlands
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29
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Release and absorption rates of intramuscularly and subcutaneously injected pharmaceuticals (II). Int J Pharm 1994. [DOI: 10.1016/0378-5173(94)90103-1] [Citation(s) in RCA: 82] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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30
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Barna BP, Thomassen MJ, Maier M, Medendorp SV, Tubbs RR, Chiang T, Zhou P, Yen-Lieberman B, Singh-Burgess S, Deodhar SD. Combination therapy with a synthetic peptide of C-reactive protein and interleukin 2: augmented survival and eradication of pulmonary metastases. Cancer Immunol Immunother 1994; 38:38-42. [PMID: 8299117 PMCID: PMC11038352 DOI: 10.1007/bf01517168] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/1993] [Accepted: 08/24/1993] [Indexed: 01/29/2023]
Abstract
A synthetic peptide (RS-83277) derived from the structure of human C-reactive protein (CRP) was previously shown to have antitumor activity in three different murine tumor models when administered in multilamellar vesicles (MLV). The therapeutic effects were comparable to those seen with MLV-encapsulated native CRP. The present study evaluated the therapeutic and immunomodulatory effects of administering CRP peptide RS-83277 MLV simultaneously with low-dose recombinant interleukin-2 (IL-2) to C57Bl/6 mice bearing established pulmonary metastases of fibrosarcoma T241. Results demonstrated that the capacity of RS-83277 MLV to inhibit tumor metastases and prolong survival was significantly augmented by combination with 10,000 U/day IL-2 i.p. Treated animals showed no evidence of toxicity. By immunohistochemistry, increased Thy 1.2+ cells were detectable in lungs of RS-83277 MLV/IL-2-treated animals compared to those receiving RS-83277 MLV alone. Circulating tumor necrosis factor alpha (TNF) and interferon (IFN) were not detectable in animals receiving RS-83277 MLV alone, but TNF was significantly elevated in animals receiving IL-2. In the presence of combination therapy, however, circulating TNF was not detectable. Results suggest that the combination of synthetic CRP peptide RS-83277 MLV and low-dose IL-2 offers a therapeutic advantage over either agent alone.
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Affiliation(s)
- B P Barna
- Division of Pathology and Laboratory Medicine, Cleveland Clinic Foundation, OH 41195
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31
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Taylor PW, Howes C. Rationale for targeted drug delivery. BIOTHERAPY (DORDRECHT, NETHERLANDS) 1991; 3:1-8. [PMID: 2009212 DOI: 10.1007/bf02175095] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- P W Taylor
- CIBA-Geigy Pharmaceuticals, Horsham, West Sussex, UK
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