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Aerosol immunization by alginate coated mycobacterium (BCG/MIP) particles provide enhanced immune response and protective efficacy than aerosol of plain mycobacterium against M.tb. H37Rv infection in mice. BMC Infect Dis 2019; 19:568. [PMID: 31262260 PMCID: PMC6604382 DOI: 10.1186/s12879-019-4157-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 05/31/2019] [Indexed: 11/30/2022] Open
Abstract
Background With the aim of preparing a more effective, safe and economical vaccine for tuberculosis, inhalable live mycobacterium formulations were evaluated. Methods Alginate particles in the size range of 2–4 μm were prepared by encapsulating live Bacille Calmette–Guérin (BCG) and “Mycobacterium indicus pranii” (MIP). These particles were characterized for their size, stability and release profile. Mice were immunized with liquid aerosol or dry powder aerosol (DPA) alginate encapsulated mycobacterium particles and their in-vitro recall response and infection with mycobacterium H37Rv were investigated. Results It was found that the DPA of alginate encapsulated mycobacterium particles invoked superior immune response and provided higher protection in mice than the liquid aerosol. The BCG encapsulated in alginate particles (BEAP) and MIP encapsulated in alginate particles (MEAP) were engulfed by bone marrow dendritic cells (BMDCs) and co-localized with lysosome. The MEAP/BEAP activated BMDCs exhibited higher chemotaxis movement and had enhanced ability of antigen presentation to T cells. The in-vitro recall response of BEAP/MEAP immunized mice when compared in terms of proliferation index and Interferon gamma (IFN-gamma) released by splenocytes and mediastinal lymph node cells was found to be higher than mice immunized by liquid aerosol of BCG/MIP. Finally, different groups of immunized mice were infected with M. tb H37Rv and after 16 weeks the Colony forming units (CFUs) in lung and spleen estimated. The bacilli burden in the BEAP/MEAP immunized mice was significantly less than the respective liquid aerosol immunized mice and the histopathology of BEAP/MEAP immunized mice lungs showed very little damage. Conclusions These inhale-able vaccines formulation of alginate coated live mycobacterium are more immunogenic as compared to the aerosol of bacilli and they provide better protection in mice when infected with H37Rv. Electronic supplementary material The online version of this article (10.1186/s12879-019-4157-2) contains supplementary material, which is available to authorized users.
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Xie M, Xu M, Chen X, Li Y. Recent Progress of Supercritical Carbon Dioxide in Producing Natural Nanomaterials. Mini Rev Med Chem 2019; 19:465-476. [PMID: 30324880 DOI: 10.2174/1389557518666181015152952] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Revised: 07/13/2018] [Accepted: 07/20/2018] [Indexed: 02/06/2023]
Abstract
Natural medicines are widely utilized in human healthcare. Their beneficial effects have been attributed to the existence of natural active ingredients (NAI) with a positive impact on disease treatment and prevention. Public awareness about the side effects of synthetic chemical compounds increased the need for NAI as well. Clinical applications of NAI are limited by their instability and poor water solubility, while micronization is a major strategy to overcome these drawbacks. Supercritical carbon dioxide (sc-CO2) based nano techniques have drawn great attention in nanomedicinal area for many years, due to their unique characters such as fast mass transfer, near zero surface tension, effective solvents elimination, non-toxic, non-flammable, low cost and environmentally benign. In terms of functions of sc-CO2, many modified sc-CO2 based techniques are developed to produce NAI nanoparticles with high solubility, biological availability and stability. 5 types of promising methods, including gas-assisted melting atomization, CO2-assisted nebulization with a bubble dryer, supercritical fluidassisted atomization with a hydrodynamic cavitation mixer, supercritical CO2-based coating method and solution-enhanced dispersion by sc-CO2 process, are summarized in this article followed by a highlight of their fundamental synthesis principles and important medicinal applications.
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Affiliation(s)
- Maobin Xie
- Key Laboratory of Oral Medicine, Guangzhou Institute of Oral Disease, Stomatology Hospital; Department of Biomedical Engineering, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou 511436, China
| | - Man Xu
- Key Laboratory of Oral Medicine, Guangzhou Institute of Oral Disease, Stomatology Hospital; Department of Biomedical Engineering, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou 511436, China
| | - Xiaoming Chen
- Key Laboratory of Oral Medicine, Guangzhou Institute of Oral Disease, Stomatology Hospital; Department of Biomedical Engineering, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou 511436, China
| | - Yi Li
- School of Materials, The University of Manchester, Manchester M13 9PL, United Kingdom
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Comparison of mucoadhesive and cohesive features of poly(acrylic acid)-conjugates respective their molecular mass. Eur J Pharm Biopharm 2017; 113:149-156. [DOI: 10.1016/j.ejpb.2016.12.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 11/29/2016] [Accepted: 12/06/2016] [Indexed: 01/23/2023]
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Mohammad MA, Grimsey IM, Forbes RT, Blagbrough IS, Conway BR. Effect of mechanical denaturation on surface free energy of protein powders. Colloids Surf B Biointerfaces 2016; 146:700-6. [DOI: 10.1016/j.colsurfb.2016.07.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2016] [Revised: 06/09/2016] [Accepted: 07/04/2016] [Indexed: 12/12/2022]
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Three-Dimensional Printing of Carbamazepine Sustained-Release Scaffold. J Pharm Sci 2016; 105:2155-63. [DOI: 10.1016/j.xphs.2016.04.031] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Revised: 04/25/2016] [Accepted: 04/28/2016] [Indexed: 11/23/2022]
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Deutel B, Laffleur F, Palmberger T, Saxer A, Thaler M, Bernkop-Schnürch A. In vitro characterization of insulin containing thiomeric microparticles as nasal drug delivery system. Eur J Pharm Sci 2016; 81:157-61. [DOI: 10.1016/j.ejps.2015.10.022] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Revised: 10/13/2015] [Accepted: 10/26/2015] [Indexed: 11/26/2022]
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Schäfer M, Peuker U. Zerkleinerung von polymeren Ionenaustauscherpartikeln durch Feinstmahlung. CHEM-ING-TECH 2015. [DOI: 10.1002/cite.201500100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Mohammad MA, Grimsey IM, Forbes RT. Mapping the solid-state properties of crystalline lysozyme during pharmaceutical unit-operations. J Pharm Biomed Anal 2015; 114:176-83. [DOI: 10.1016/j.jpba.2015.05.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2015] [Revised: 05/11/2015] [Accepted: 05/13/2015] [Indexed: 11/28/2022]
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Investigation of the milling capabilities of the F10 Fine Grind mill using Box-Behnken designs. Eur J Pharm Biopharm 2015; 89:208-15. [DOI: 10.1016/j.ejpb.2014.12.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2014] [Accepted: 12/03/2014] [Indexed: 11/20/2022]
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Müller C, Perera G, König V, Bernkop-Schnürch A. Development and in vivo evaluation of papain-functionalized nanoparticles. Eur J Pharm Biopharm 2014; 87:125-31. [DOI: 10.1016/j.ejpb.2013.12.012] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2012] [Revised: 12/13/2013] [Accepted: 12/19/2013] [Indexed: 10/25/2022]
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The charging efficiency and flow dynamics of micropowder during jet milling/electrostatic dispersion. POWDER TECHNOL 2014. [DOI: 10.1016/j.powtec.2014.02.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Francesko A, Fernandes MM, Perelshtein I, Benisvy-Aharonovich E, Gedanken A, Tzanov T. One-step sonochemical preparation of redox-responsive nanocapsules for glutathione mediated RNA release. J Mater Chem B 2014; 2:6020-6029. [DOI: 10.1039/c4tb00599f] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A simple and reproducible sonochemical method is described to achieve redox-responsive nanocapsules based on intracellular glutathione levels for enhanced and sustained RNA delivery.
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Affiliation(s)
- Antonio Francesko
- Grup de Biotecnologia Molecular i Industrial
- Department of Chemical Engineering
- Universitat Polìtecnica de Catalunya
- , Spain
| | - Margarida M. Fernandes
- Grup de Biotecnologia Molecular i Industrial
- Department of Chemical Engineering
- Universitat Polìtecnica de Catalunya
- , Spain
| | - Ilana Perelshtein
- Department of Chemistry
- Institute of Nanotechnology and Advanced Materials
- Bar-Ilan University
- Israel
| | | | - Aharon Gedanken
- Department of Chemistry
- Institute of Nanotechnology and Advanced Materials
- Bar-Ilan University
- Israel
| | - Tzanko Tzanov
- Grup de Biotecnologia Molecular i Industrial
- Department of Chemical Engineering
- Universitat Polìtecnica de Catalunya
- , Spain
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Millotti G, Vetter A, Leithner K, Sarti F, Shahnaz Bano G, Augustijns P, Bernkop-Schnürch A. Development of thiolated poly(acrylic acid) microparticles for the nasal administration of exenatide. Drug Dev Ind Pharm 2013; 40:1677-82. [PMID: 24131355 DOI: 10.3109/03639045.2013.842578] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The purpose of this study was to develop a microparticulate formulation for nasal delivery of exenatide utilizing a thiolated polymer. Poly(acrylic acid)-cysteine (PAA-cys) and unmodified PAA microparticles loaded with exenatide were prepared via coprecipitation of the drug and the polymer followed by micronization. Particle size, drug load and release of incorporated exenatide were evaluated. Permeation enhancing properties of the formulations were investigated on excised porcine respiratory mucosa. The viability of the mucosa was investigated by histological studies. Furthermore, ciliary beat frequency (CBF) studies were performed. Microparticles displayed a mean size of 70-80 µm. Drug encapsulation was ∼80% for both thiolated and non-thiolated microparticles. Exenatide was released from both thiolated and non-thiolated particles in comparison to exenatide in buffer only within 40 min. As compared to exenatide dissolved in buffer only, non-thiolated and thiolated microparticles resulted in a 2.6- and 4.7-fold uptake, respectively. Histological studies performed before and after permeation studies showed that the mucosa is not damaged during permeation studies. CBF studies showed that the formulations were cilio-friendly. Based on these results, poly(acrylic acid)-cysteine-based microparticles seem to be a promising approach starting point for the nasal delivery of exenatide.
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Affiliation(s)
- Gioconda Millotti
- Department of Pharmaceutical Technology, Institute of Pharmacy, Leopold-Franzens-University Innsbruck, CCB-Center for Chemistry and Biochemistry , Innsbruck, Austria , Europe and
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Rahmat D, Müller C, Shahnaz G, Leithner K, Laffleur F, Khan MI, Martien R, Schnürch AB. HEC-cysteamine particles: influence of particle size, zeta potential, morphology and sulfhydryl groups on permeation enhancing properties. Drug Dev Ind Pharm 2012; 39:1338-45. [DOI: 10.3109/03639045.2012.711834] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Sarti F, Iqbal J, Müller C, Shahnaz G, Rahmat D, Bernkop-Schnürch A. Poly(acrylic acid)–cysteine for oral vitamin B12 delivery. Anal Biochem 2012; 420:13-9. [DOI: 10.1016/j.ab.2011.08.039] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2011] [Revised: 08/16/2011] [Accepted: 08/22/2011] [Indexed: 10/17/2022]
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Chen AZ, Zhao Z, Wang SB, Li Y, Zhao C, Liu YG. A continuous RESS process to prepare PLA–PEG–PLA microparticles. J Supercrit Fluids 2011. [DOI: 10.1016/j.supflu.2011.08.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Palmberger TF, Augustijns P, Vetter A, Bernkop-Schnürch A. Safety assessment of thiolated polymers: effect on ciliary beat frequency in human nasal epithelial cells. Drug Dev Ind Pharm 2011; 37:1455-62. [PMID: 21635138 DOI: 10.3109/03639045.2011.584537] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE The aim of this study was to investigate the nasal safety of gel formulations of thiolated polymers (thiomers) by assessing their effect on ciliary beat frequency (CBF) in human nasal epithelial cells. METHODS Poly(acrylic acid) 450 kDa-cysteine (PAA-cys) and alginate-cysteine (alg-cys) were synthesized by covalent attachment of L-cysteine to the polymeric backbone. The cationic polymer chitosan-thiobutylamidine (chito-TBA) was synthesized by attaching iminothiolane to chitosan. CBF using was measured by a photometric system. CBF was measured before incubating the cells with test gels, during incubation and after washing out the polymeric test gels to evaluate reversibility of cilio-inhibition. The influence of viscosity on CBF was determined by using hydroxyethylcellulose (HEC)-gels of various concentrations. RESULTS Ciliary beating was observed to be affected by viscosity, but cilia were still beating in the presence of a HEC-gel displaying an apparent viscosity of 25 Pa.s. In case of thiolated polymers and their unmodified control, a concentration-dependent decrease in CBF could be observed. PAA-cys, alg-cys, chito-TBA and their corresponding unmodified controls exhibited a moderate cilio-inhibitory effect, followed by a partial recovery of CBF when used at a concentration of 1%. Alg-cys 2% and chito-TBA 2% (m/v) gels exhibited severe cilio-inhibition, which was partially reversible. L-cysteine and reduced glutathione led to mild cilio-inhibition at concentrations of 3% (m/v). CONCLUSIONS Taking into account that dilution after application and cilio-modifying effects is usually more pronounced under in vitro conditions, thiomers can be considered as suitable excipients for nasal drug delivery systems.
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Affiliation(s)
- Thomas F Palmberger
- Department of Pharmaceutical Technology, Institute of Pharmacy, Innsbruck, Austria
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Rahman Z, Agarabi C, Zidan AS, Khan SR, Khan MA. Physico-mechanical and stability evaluation of carbamazepine cocrystal with nicotinamide. AAPS PharmSciTech 2011; 12:693-704. [PMID: 21598082 DOI: 10.1208/s12249-011-9603-4] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2010] [Accepted: 02/15/2011] [Indexed: 11/30/2022] Open
Abstract
The focus of this investigation was to prepare the cocrystal of carbamazepine (CBZ) using nicotinamide as a coformer and to compare its preformulation properties and stability profile with CBZ. The cocrystal was prepared by solution cooling crystallization, solvent evaporation, and melting and cryomilling methods. They were characterized for solubility, intrinsic dissolution rate, chemical identification by Fourier transform infrared spectroscopy, crystallinity by differential scanning calorimetry, powder X-ray diffraction, and morphology by scanning electron microscopy. Additionally, mechanical properties were evaluated by tensile strength and Heckel analysis of compacts. The cocrystal and CBZ were stored at 40°C/94% RH, 40°C/75% RH, 25°C/60% RH, and 60°C to determine their stability behavior. The cocrystals were fluffy, with a needle-shaped crystal, and were less dense than CBZ. The solubility profiles of the cocrystals were similar to CBZ, but its intrinsic dissolution rate was lower due to the high tensile strength of its compacts. Unlike CBZ, the cocrystals were resistant to hydrate transformation, as revealed by the stability studies. Plastic deformation started at a higher compression pressure in the cocrystals than CBZ, as indicated by the high yield pressure. In conclusion, the preformulation profile of the cocrystals was similar to CBZ, except that it had an advantageous resistance to hydrate transformation.
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Hoyer H, Hombach J, Perera G, Thaurer M, Bernkop-Schnürch A. Synthesis and in vitro characterization of a novel PAA–ATP conjugate. Drug Dev Ind Pharm 2010; 37:300-9. [DOI: 10.3109/03639045.2010.511231] [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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Senyigit ZA, Vetter A, Guneri T, Bernkop-Schnürch A. Gastroretentive particles formulated with thiomers: development and in vitro evaluation. J Drug Target 2010; 18:362-72. [PMID: 20021230 DOI: 10.3109/10611860903483370] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The objective of this study is to develop and evaluate gastroretentive particulate delivery systems using Riboflavin-5'-monophosphate sodium salt dihydrate (RF5'PNa) as model drug. Poly(acrylic acid)-cysteine and chitosan-4-thiobuthylamidine were evaluated and compared as anionic and cationic polymers for gastroretentive particles. Permeation studies were performed with freshly excised stomach mucosa from rats. Polymers and combination with glutathione were evaluated for permeation enhancing properties. Furthermore, particles were prepared by air jet milling and characterized. Permeation studies showed that the apparent permeability coefficients for RF5'PNa with thiomers and glutathione are 1.511-fold and 2.354-fold higher than control, respectively. It can be seen from the results glutathione in combination with thiomers has a significant influence for increasing permeation. Poly(acrylic acid)-cysteine and chitosan-4-thiobuthylamidine particles demonstrated a mean diameter of 336.5 +/- 16.5 and 396.3 +/- 17.0 nm and zeta potential of -19.98 +/- 1.015 and 27.15 +/- 0.500 mV, respectively. The drug loading of Poly(acrylic acid) particles was significantly higher than chitosan particles. The release rate of RF5'PNa from the thiolated particles was slower compared with unmodified particles. Moreover, thiolated particles showed higher mucoadhesive properties compared to unmodified particles. Overall, thiolated particles of both anionic and cationic polymers had improved mucoadhesive and controlled release properties. Therefore, they could be promising for gastroretentive delivery systems.
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Affiliation(s)
- Zeynep Ay Senyigit
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Ege University, Bornova, Izmir, Turkey.
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Hoyer H, Schlocker W, Greindl M, Ostermann T, Bernkop-Schnürch A. Preparation and evaluation of thiomer nanoparticles via high pressure homogenization. J Microencapsul 2010; 27:487-95. [DOI: 10.3109/02652040903518460] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Analytical characterization of chitosan nanoparticles for peptide drug delivery applications. Anal Bioanal Chem 2008; 393:207-15. [PMID: 18958447 DOI: 10.1007/s00216-008-2463-4] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2008] [Revised: 10/01/2008] [Accepted: 10/07/2008] [Indexed: 10/21/2022]
Abstract
Chitosan-cyclodextrin hybrid nanoparticles (NPs) were obtained by the ionic gelation process in the presence of glutathione (GSH), chosen as a model drug. NPs were characterized by means of transmission electron microscopy and zeta-potential measurements. Furthermore, a detailed X-ray photoelectron spectroscopy study was carried out in both conventional and depth-profile modes. The combination of controlled ion-erosion experiments and a scrupulous curve-fitting approach allowed for the first time the quantitative study of the GSH in-depth distribution in the NPs. NPs were proven to efficiently encapsulate GSH in their inner cores, thus showing promising perspectives as drug carriers.
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