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Prüfert F, Hering U, Zaichik S, Le NMN, Bernkop-Schnürch A. Synthesis and in vitro characterization of a preactivated thiolated acrylic acid/acrylamide-methylpropane sulfonic acid copolymer as a mucoadhesive sprayable polymer. Int J Pharm 2020; 583:119371. [PMID: 32339632 DOI: 10.1016/j.ijpharm.2020.119371] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 04/20/2020] [Accepted: 04/22/2020] [Indexed: 10/24/2022]
Abstract
AIM Development of a preactivated thiomer as sprayable excipient for mucoadhesive formulations. METHODS CG4500 (acrylic acid/acrylamide-methyl propane sulfonic acid copolymer) was thiolated by conjugation with L-cysteine and preactivated by further modification with 2-mercaptonicotinic acid (MNA) in a two-step synthesis and characterized regarding degree of modification and cytotoxicity on Caco-2 cells. The mucoadhesive properties of this novel thiomer were evaluated via rheological synergism, tensile and mucosal residence time studies. Furthermore, the sprayability of the thiomer was evaluated. RESULTS The newly synthesized derivatives CG4500-SH and CG4500-S-S-MNA showed mean coupling rates of 651 µmol thiol groups and 264 µmol MNA per gram polymer, respectively. Even for the unmodified polymer a rheological synergism was observed with isolated porcine intestinal mucus, which was 2.81-fold higher in case of the preactivated thiomer. Mucoadhesion studies on freshly excised porcine intestinal mucosa confirmed these results via a 2.43-fold higher total work of adhesion and a 2.31-fold higher mucosal residence time of the preactivated thiomer. In sprayability tests it was shown that solutions of the preactivated thiomer could be sprayed in concentrations up to 12% (m/V). CONCLUSION The novel polymer CG4500-S-S-MNA is a promising sprayable excipient for mucoadhesive formulations.
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Affiliation(s)
- Felix Prüfert
- Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Ulrike Hering
- Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Sergey Zaichik
- Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Nguyet-Minh Nguyen Le
- Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria; Department of Industrial Pharmacy, University of Medicine and Pharmacy, Ho Chi Minh City, Vietnam
| | - Andreas Bernkop-Schnürch
- Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria.
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Prüfert F, Fischer F, Leichner C, Zaichik S, Bernkop-Schnürch A. Development and In Vitro Evaluation of Stearic Acid Phosphotyrosine Amide as New Excipient for Zeta Potential Changing Self-Emulsifying Drug Delivery Systems. Pharm Res 2020; 37:79. [PMID: 32253523 PMCID: PMC7136179 DOI: 10.1007/s11095-020-02802-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Accepted: 03/18/2020] [Indexed: 11/28/2022]
Abstract
PURPOSE Development of zeta potential changing SEDDS containing newly synthesized derivative stearic acid phosphotyrosine amide. METHODS Stearoyl chloride was conjugated with phosphotyrosine, which is substrate for the brush border enzyme intestinal alkaline phosphate. The synthesized derivative was implemented in different SEDDS formulations and the zeta potential changing properties and the concluding mucus diffusion abilities were evaluated. RESULTS Stearic acid phosphotyrosine amide was successfully synthesized and incorporated into SEDDS. A SEDDS formulation containing the new derivative showed a zeta potential of -14 mV before, and + 2 mV after enzymatic cleavage by intestinal alkaline phosphatase. Experiments on a Caco-2 monolayer demonstrated that the phosphate cannot only be cleaved by isolated enzyme, but also by enzyme, which was expressed by cells. The mucus diffusion abilities of the untreated, negatively charged SEDDS were significantly higher compared to the enzymatically cleaved, positively charged SEDDS. CONCLUSION The developed stearic acid phosphotyrosine represents a promising excipient for zeta potential changing SEDDS. Graphical Abstract.
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Affiliation(s)
- Felix Prüfert
- Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020, Innsbruck, Austria
| | - Franz Fischer
- Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020, Innsbruck, Austria
| | - Christina Leichner
- Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020, Innsbruck, Austria
| | - Sergey Zaichik
- Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020, Innsbruck, Austria
| | - Andreas Bernkop-Schnürch
- Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020, Innsbruck, Austria.
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Leichner C, Jelkmann M, Prüfert F, Laffleur F, Bernkop-Schnürch A. Intestinal enzyme delivery: Chitosan/tripolyphosphate nanoparticles providing a targeted release behind the mucus gel barrier. Eur J Pharm Biopharm 2019; 144:125-131. [DOI: 10.1016/j.ejpb.2019.09.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 09/12/2019] [Accepted: 09/13/2019] [Indexed: 10/26/2022]
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Zahir-Jouzdani F, Lupo N, Hermann M, Prüfert F, Atyabi F, Bernkop Schnürch A. Glyceryl ester surfactants: Promising excipients to enhance the cell permeating properties of SEDDS. Eur J Pharm Biopharm 2018; 129:154-161. [DOI: 10.1016/j.ejpb.2018.05.032] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Revised: 04/15/2018] [Accepted: 05/26/2018] [Indexed: 10/14/2022]
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Bonengel S, Jelkmann M, Abdulkarim M, Gumbleton M, Reinstadler V, Oberacher H, Prüfert F, Bernkop-Schnürch A. Impact of different hydrophobic ion pairs of octreotide on its oral bioavailability in pigs. J Control Release 2018; 273:21-29. [DOI: 10.1016/j.jconrel.2018.01.012] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2017] [Accepted: 01/15/2018] [Indexed: 01/26/2023]
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Prüfert F, Bonengel S, Köllner S, Griesser J, Wilcox MD, Chater PI, Pearson JP, Bernkop-Schnürch A. ζ potential changing nanoparticles as cystic fibrosis transmembrane conductance regulator gene delivery system: an in vitro evaluation. Nanomedicine (Lond) 2017; 12:2713-2724. [DOI: 10.2217/nnm-2017-0115] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aim: Aim of the study was the development of ζ potential changing nanoparticles as gene delivery system for the cystic fibrosis transmembrane conductance regulator gene. Methods: Chitosan and carboxymethyl cellulose were modified with phosphotyrosine, a substrate for the brush border enzyme alkaline phosphatase. With these synthesized derivatives, different nanoparticle formulations, including the cystic fibrosis transmembrane conductance regulator gene were prepared by ionic gelation. Results: A change from negative to positive ζ potential after enzymatic cleavage could be observed. Transfection studies with HEK-293 and Caco-2 cells showed transfection rates comparable to Lipofectamine 2000. Transfection efficiencies were significantly decreased when phosphate cleavage and thus ζ potential change was inhibited by phosphatase inhibitor. Conclusion: The developed nanoparticles represent a promising gene delivery system.
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Affiliation(s)
- Felix Prüfert
- Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Sonja Bonengel
- Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Saskia Köllner
- ThioMatrix GmbH, Research Center Innsbruck, Trientlgasse 65, 6020 Innsbruck, Austria
| | - Janine Griesser
- ThioMatrix GmbH, Research Center Innsbruck, Trientlgasse 65, 6020 Innsbruck, Austria
| | - Matthew D Wilcox
- Institute for Cell & Molecular Biosciences, Medical School, Newcastle University, Newcastle upon Tyne, NE2 4HH, UK
| | - Peter I Chater
- Institute for Cell & Molecular Biosciences, Medical School, Newcastle University, Newcastle upon Tyne, NE2 4HH, UK
| | - Jeffrey P Pearson
- Institute for Cell & Molecular Biosciences, Medical School, Newcastle University, Newcastle upon Tyne, NE2 4HH, UK
| | - Andreas Bernkop-Schnürch
- Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
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Griesser J, Burtscher S, Köllner S, Nardin I, Prüfert F, Bernkop-Schnürch A. Zeta potential changing self-emulsifying drug delivery systems containing phosphorylated polysaccharides. Eur J Pharm Biopharm 2017; 119:264-270. [DOI: 10.1016/j.ejpb.2017.06.025] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2017] [Revised: 05/02/2017] [Accepted: 06/27/2017] [Indexed: 11/24/2022]
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Köllner S, Nardin I, Markt R, Griesser J, Prüfert F, Bernkop-Schnürch A. Self-emulsifying drug delivery systems: Design of a novel vaginal delivery system for curcumin. Eur J Pharm Biopharm 2017; 115:268-275. [PMID: 28323109 DOI: 10.1016/j.ejpb.2017.03.012] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Revised: 03/15/2017] [Accepted: 03/16/2017] [Indexed: 01/08/2023]
Abstract
AIM The aim of this study was to develop a vaginal self-emulsifying delivery system for curcumin being capable of spreading, of permeating the mucus gel layer and of protecting the drug being incorporated in oily nanodroplets towards mucus interactions and immobilization. METHODS The emulsifying properties of curcumin loaded SEDDS containing 30% Cremophor RH40, 20% Capmul PG-8, 30% Captex 300, 10% DMSO and 10% tetraglycol (SEDD formulation A) as well as 25% PEG 200, 35% Cremophor RH40, 20% Captex 355, 10% Caprylic acid and 10% Tween 80 (SEDD formulation B) after diluting 1+2 with artificial vaginal fluid were characterized regarding droplet size and zeta potential. Collagen swelling test was used to examine the irritation potential of SEDDS. Additionally to mucus binding studies, permeation studies in the mucus were performed. Furthermore, spreading potential of the novel developed formulations was compared with a commercial available o/w cream (non-ionic hydrophilic cream) on vaginal mucosa. RESULTS SEDDS displayed a mean droplet size between 38 and 141nm and a zeta potential of -0.3 to -1.6mV. The collagen swelling test indicated no significant irritation potential of both formulations over 24h. An immediate interaction of unformulated curcumin with the mucus was determined, whereas both SEDDS facilitated drug permeation through the mucus layer. Formulation B showed a 2.2-fold improved transport ratio of curcumin compared to SEDD formulation A. In comparison to the vaginal cream, SEDD formulation A and B were able to spread over the vaginal mucosa and cover the tissue to a 17.8- and 14.8-fold higher extent, respectively. CONCLUSION According to these results, SEDDS seems to be a promising tool for vaginal application.
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Affiliation(s)
- S Köllner
- ThioMatrix GmbH, Research Center Innsbruck, Trientlgasse 65, 6020 Innsbruck, Austria
| | - I Nardin
- ThioMatrix GmbH, Research Center Innsbruck, Trientlgasse 65, 6020 Innsbruck, Austria
| | - R Markt
- ThioMatrix GmbH, Research Center Innsbruck, Trientlgasse 65, 6020 Innsbruck, Austria
| | - J Griesser
- ThioMatrix GmbH, Research Center Innsbruck, Trientlgasse 65, 6020 Innsbruck, Austria
| | - F Prüfert
- University of Innsbruck, Institute of Pharmacy/Pharmaceutical Technology, CCB - Centrum of Chemistry and Biomedicine, Innrain 80-82, 6020 Innsbruck, Austria
| | - A Bernkop-Schnürch
- University of Innsbruck, Institute of Pharmacy/Pharmaceutical Technology, CCB - Centrum of Chemistry and Biomedicine, Innrain 80-82, 6020 Innsbruck, Austria.
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Netsomboon K, Suchaoin W, Laffleur F, Prüfert F, Bernkop-Schnürch A. Multifunctional adhesive polymers: Preactivated thiolated chitosan-EDTA conjugates. Eur J Pharm Biopharm 2016; 111:26-32. [PMID: 27865931 DOI: 10.1016/j.ejpb.2016.10.029] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 10/12/2016] [Accepted: 10/28/2016] [Indexed: 11/26/2022]
Abstract
AIM The aim of this study was to synthesis preactivated thiolated chitosan-EDTA (Ch-EDTA-cys-2MNA) conjugates exhibiting in particular high mucoadhesive, cohesive and chelating properties. METHODS Thiol groups were coupled with chitosan by carbodiimide reaction and further preactivated by attachment with 2-mercaptonicotinic acid (2MNA) via disulfide bond formation. Determinations of primary amino and sulfhydryl groups were performed by TNBS and Ellman's tests, respectively. Cytotoxicity was screened by resazurin assay in Caco-2 cells. Mucoadhesive properties and bivalent cation binding capacity with Mg2+ and Ca2+ in comparison to chitosan-EDTA (Ch-EDTA) and thiolated Ch-EDTA (Ch-EDTA-cys) were evaluated. RESULTS Determination of 2MNA and total sulfhydryl groups indicated that 80% of thiol groups were preactivated. The results from cytotoxicity studies demonstrated that Ch-EDTA-cys and Ch-EDTA-cys-2MNA were not toxic to the cells at the polymer test concentration of 0.25% (w/v) while cell viability decreased by increasing the concentration of Ch-EDTA. Although EDTA molecule was modified by thiolation and preactivation, approximately 50% of chelating properties of the conjugates were maintained compared to Ch-EDTA. Ch-EDTA-cys-2MNA adhered on freshly excised porcine intestinal mucosa up to 6h while Ch-EDTA adhered for just 1h. CONCLUSION According to the combination of mucoadhesive and chelating properties of the conjugates synthesized in this study, Ch-EDTA-cys-2MNA might be useful for various mucosal drug delivery systems.
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Affiliation(s)
- Kesinee Netsomboon
- Division of Pharmaceutical Sciences, Faculty of Pharmacy, Thammasat University, Rungsit campus, Phahonyothin Rd., Khlong Luang, Pathumthani 12120, Thailand
| | - Wongsakorn Suchaoin
- Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Flavia Laffleur
- Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Felix Prüfert
- Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Andreas Bernkop-Schnürch
- Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria.
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Netsomboon K, Partenhauser A, Rohrer J, Elli Sündermann N, Prüfert F, Suchaoin W, Laffleur F, Bernkop-Schnürch A. Preactivated thiomers for intranasal delivery of apomorphine: In vitro and in vivo evaluation. Eur J Pharm Biopharm 2016; 109:35-42. [PMID: 27615996 DOI: 10.1016/j.ejpb.2016.09.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Revised: 09/01/2016] [Accepted: 09/06/2016] [Indexed: 11/26/2022]
Abstract
The purpose of this study was to synthesize preactivated thiomers with different degrees of preactivation and to evaluate their potential as novel excipient for nasal apomorphine administration. The thiomer (PAA-cys) was synthesized by addition of thiol groups on poly(acrylic acid) with various molecular mass including 100, 250and450kDafollowed by immobilization of 2-mercaptonicotinic acid (2MNA) to thiol groups by disulfide bond formation resulting in PAA-cys-2MNA. These thiomers (PAA100-cys, PAA250-cys and PAA450-cys) were in the next step preactivated by 56.3, 59.5 and 46.5% (medium degree), and 80.1, 81.6 and 87% (high degree), respectively. Apomorphine permeation across porcine nasal mucosa in the presence of PAA100-cys-2MNA, PAA250-cys-2MNA and PAA450-cys-2MNA with high degree of preactivation was 3.1-, 4.4- and 4.1-fold, while 2.7-, 3.4- and 3.0-fold higher than control for medium degree of preactivation, respectively. Administration of apomorphine in the presence of PAA250-cys-2MNA showed in rats 9 and ∼2-fold improvement of relative bioavailability compared with oral and intranasal administration of apomorphine solution, respectively. Because of the pronounced improvement among other polymers, PAA250-cys-2MNA with high degree of preactivation could be considered as promising excipient for nasal delivery of apomorphine.
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Affiliation(s)
- Kesinee Netsomboon
- Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria; Faculty of Pharmacy, Thammasat University, Rungsit Campus, Phahonyothin Road, Khlong Luang, Pathumthani 12120, Thailand
| | - Alexandra Partenhauser
- Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Julia Rohrer
- Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Nadine Elli Sündermann
- Division of Developmental Immunology, Center of Biomodels and Experimental Medicine (CBEM), Innsbruck Medical University, Innrain 80/82, 6020 Innsbruck, Austria
| | - Felix Prüfert
- Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Wongsakorn Suchaoin
- Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Flavia Laffleur
- Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Andreas Bernkop-Schnürch
- Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria.
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Mahmood A, Prüfert F, Efiana NA, Ashraf MI, Hermann M, Hussain S, Bernkop-Schnürch A. Cell-penetrating self-nanoemulsifying drug delivery systems (SNEDDS) for oral gene delivery. Expert Opin Drug Deliv 2016; 13:1503-1512. [PMID: 27458781 DOI: 10.1080/17425247.2016.1213236] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
OBJECTIVE The aim of study was to investigate whether cell-penetrating peptides could amplify cellular uptake of plasmid DNA (pDNA) loaded self-nanoemulsifying drug delivery systems (SNEDDS) by mucosal epithelial cells, thereby enhancing transfection efficiency. METHODS HIV-1 Tat peptide-oleoyl conjugate (TAT-OL) was synthesized through amide bond formation between HIV-1 Tat-protein 49-57 (TAT) and oleoyl-chloride (OL). SNEDDS formulation contained 29.7% each of Cremophor EL, Capmul MCM and Crodamol, 9.9% propylene glycol and 1% TAT-OL. SNEDDS with OL instead of TAT-OL served as control. RESULTS Fluorescent-microscopy demonstrated 0.5% (m/v) nanoemulsions were suitable for subsequent studies. Mucus diffusion of nanoemulsion loaded with fluorescein diacetate (FDA) was 1.5-fold increased by incorporation of TAT-OL. Confocal microscopy confirmed that droplets of nanoemulsions were successfully internalized. Furthermore, quantitative analysis showed that addition of TAT-OL increases uptake of nanoemulsions by 2.3- and 2.6-folds after 2 and 4 hours of incubation, respectively. Cellular internalization pathways were found with substantial decrease in uptake in presence of indomethacin and chlorpromazine. Transfection efficiency investigated on HEK-293-cells was found to be 1.7- and 1.8-fold higher for SNEDDS loaded with TAT-OL compared to Lipofectin and control, respectively. CONCLUSION In comparison to prevailing lipid and polymer-based delivery systems, these novel cell-penetrating SNEDDS likely represent most effective, simplistic and expedite dosage form for mucosal gene delivery.
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Affiliation(s)
- Arshad Mahmood
- a Center for Chemistry and Biomedicine, Department of Pharmaceutical Technology, Institute of Pharmacy , University of Innsbruck , Innsbruck , Austria
| | - Felix Prüfert
- a Center for Chemistry and Biomedicine, Department of Pharmaceutical Technology, Institute of Pharmacy , University of Innsbruck , Innsbruck , Austria
| | - Nuri Ari Efiana
- a Center for Chemistry and Biomedicine, Department of Pharmaceutical Technology, Institute of Pharmacy , University of Innsbruck , Innsbruck , Austria
| | - Muhammad Imtiaz Ashraf
- b Daniel Swarovski Research Laboratory, Department of Visceral, Transplant and Thoracic Surgery , Medical University Innsbruck , Innsbruck , Austria.,c Department for General, Visceral and Transplantation Surgery , Campus Virchow-Klinikum, Charité Universitätsmedizin , Berlin , Germany
| | - Martin Hermann
- d Department of Anesthesiology and Critical Care Medicine , Medical University Innsbruck , Innsbruck , Austria
| | - Shah Hussain
- e Institute of Analytical Chemistry and Radiochemistry , University of Innsbruck , Innsbruck , Austria
| | - Andreas Bernkop-Schnürch
- a Center for Chemistry and Biomedicine, Department of Pharmaceutical Technology, Institute of Pharmacy , University of Innsbruck , Innsbruck , Austria
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Leonaviciute G, Zupančič O, Prüfert F, Rohrer J, Bernkop-Schnürch A. Impact of lipases on the protective effect of SEDDS for incorporated peptide drugs towards intestinal peptidases. Int J Pharm 2016; 508:102-8. [DOI: 10.1016/j.ijpharm.2016.04.044] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Revised: 04/13/2016] [Accepted: 04/16/2016] [Indexed: 12/17/2022]
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Bonengel S, Prüfert F, Jelkmann M, Bernkop-Schnürch A. Zeta potential changing phosphorylated nanocomplexes for pDNA delivery. Int J Pharm 2016; 504:117-24. [PMID: 26453789 DOI: 10.1016/j.ijpharm.2015.10.021] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Accepted: 10/04/2015] [Indexed: 11/27/2022]
Abstract
The objective of this study was to evaluate the suitability of a zeta potential changing system as gene delivery system. The phosphate ester bearing ligand 6-phosphogluconic acid (6-PGA) was attached to linear and branched polyethyleneimine (PEI) via a carbodiimide-mediated reaction whereby 287 μmol and 413 μmol 6-PGA could be coupled per gram polymer. Nanocomplexes of these modified polymers with pDNA showed a zeta potential of +12 mV for nanocomplexes with the linear PEI-6PGA and +16 mV in case of the branched derivative. By the addition of carboxymethylcellulose (CMC), zeta potentials of the complexes were reduced to +2.86 and +3.25, respectively. Phosphate release studies on Caco 2 cells and HEK-293 cells demonstrated the ability to cleave the phosphate ester. Compared to HEK-293 cells, enzymatic degradation of the phosphate ester in Caco 2 cells was 2.3-fold higher from nanocomplexes comprising linear PEI and 4.3-fold higher from those with branched PEI. Furthermore, incubation with alkaline phosphatase led to an increase in the zeta potential of nanocomplexes based on linear PEI-6PGA to +6.96mV and +8.26 mV in nanocomplexes comprising branched PEI-6PGA. Studying transfection efficiency in Caco 2 cells and HEK-293 cells, a higher expression of the green fluorescent protein (GFP) could be detected in HEK-293 cells. In presence of a phosphate inhibitor, transfection efficiencies were decreased in both cells lines, due to a lacking shift of the zeta potential of the tested pDNA complexes. According to these results, zeta potential changing systems seem to be a promising strategy for future gene delivery systems, as this concept allows the in situ generation of positive charges in close proximity to the cellular surface.
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Affiliation(s)
- Sonja Bonengel
- Center for Chemistry and Biomedicine, Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Felix Prüfert
- Center for Chemistry and Biomedicine, Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Max Jelkmann
- Center for Chemistry and Biomedicine, Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Andreas Bernkop-Schnürch
- Center for Chemistry and Biomedicine, Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria.
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Menzel C, Bonengel S, de Sousa IP, Laffleur F, Prüfert F, Bernkop-Schnürch A. Preactivated thiolated nanoparticles: A novel mucoadhesive dosage form. Int J Pharm 2016; 497:123-8. [DOI: 10.1016/j.ijpharm.2015.11.037] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Revised: 11/16/2015] [Accepted: 11/21/2015] [Indexed: 12/14/2022]
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Netsomboon K, Feßler A, Erletz L, Prüfert F, Ruetz M, Kieninger C, Kräutler B, Bernkop-Schnürch A. Vitamin B12 and derivatives—In vitro permeation studies across Caco-2 cell monolayers and freshly excised rat intestinal mucosa. Int J Pharm 2016; 497:129-35. [DOI: 10.1016/j.ijpharm.2015.11.043] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Revised: 11/24/2015] [Accepted: 11/25/2015] [Indexed: 11/25/2022]
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16
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Hauptstein S, Dezorzi S, Prüfert F, Matuszczak B, Bernkop-Schnürch A. Synthesis and in vitro characterization of a novel S-protected thiolated alginate. Carbohydr Polym 2015; 124:1-7. [DOI: 10.1016/j.carbpol.2015.01.049] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Revised: 01/03/2015] [Accepted: 01/14/2015] [Indexed: 10/24/2022]
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17
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Bonengel S, Prüfert F, Perera G, Schauer J, Bernkop-Schnürch A. Polyethylene imine-6-phosphogluconic acid nanoparticles – a novel zeta potential changing system. Int J Pharm 2015; 483:19-25. [DOI: 10.1016/j.ijpharm.2015.01.041] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Revised: 01/15/2015] [Accepted: 01/21/2015] [Indexed: 11/29/2022]
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