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Dartora VFC, Passos JS, Osorio B, Hung RC, Nguyen M, Wang A, Panitch A. Chitosan hydrogels with MK2 inhibitor peptide-loaded nanoparticles to treat atopic dermatitis. J Control Release 2023; 362:591-605. [PMID: 37660990 DOI: 10.1016/j.jconrel.2023.08.061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 08/05/2023] [Accepted: 08/31/2023] [Indexed: 09/05/2023]
Abstract
Atopic dermatitis (AD) is a chronic inflammatory skin disorder that lacks ideal long-term treatment options due to a series of side effects, such as skin atrophy, related to the most common treatment prescribed to manage moderate-to-severe AD. In this study, a cell-penetrating MK2 inhibitor peptide YARA (YARAAARQARAKALNRQGLVAA) was loaded into hollow thermo-responsive pNIPAM nanoparticles (NP), which were further incorporated into chitosan hydrogels (H-NP-YARA) to promote local drug delivery, improve moisture and the anti-inflammatory activity. The NPs exhibited high loading efficiency (>50%) and the hydrogel remained porous following NP incorporation as observed by scanning electron microscopy (SEM). Both nanoparticles and hydrogels were able to improve the release of YARA and sustained release to up to 120 h. The hydrogels and NPs delivered 2 and 4-fold more YARA into viable skin layers of porcine skin in vitro at 12 h post-application than the non-encapsulated compound in intact and impaired barrier conditions. Furthermore, the YARA-loaded NPs (NP-YARA) and H-NP-YARA treatment decreased the levels of inflammatory cytokines up to 20 time-fold compared with the non-treated group of human keratinocytes under inflammatory conditions. Consistent with the results in cell culture, the loading of YARA in NP reduced the levels of IL-1β, IL-6, and TNF-α up to 3.3 times in an ex vivo skin culture model after induction of inflammation. A further decrease of up to 17 times-fold was observed with H-NP-YARA treatment compared to the drug in solution. Our data collectively suggest that chitosan hydrogel containing YARA-loaded nanoparticles is a promising new formulation for the topical treatment of AD.
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Affiliation(s)
- Vanessa F C Dartora
- Biomedical Engineering Graduate Group, University of California Davis, Davis, CA, USA; Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, USA
| | - Julia Sapienza Passos
- Biomedical Engineering Graduate Group, University of California Davis, Davis, CA, USA; Institute of Biomedical Sciences, Department of Pharmacology, University of Sao Paulo, Brazil
| | - Blanca Osorio
- Biomedical Engineering Graduate Group, University of California Davis, Davis, CA, USA
| | - Ruei-Chun Hung
- Biomedical Engineering Graduate Group, University of California Davis, Davis, CA, USA; Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, USA
| | - Michael Nguyen
- Biomedical Engineering Graduate Group, University of California Davis, Davis, CA, USA
| | - Aijun Wang
- Biomedical Engineering Graduate Group, University of California Davis, Davis, CA, USA; Department of Surgery, University of California Davis, Sacramento, CA, USA; Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children, Sacramento, CA, USA
| | - Alyssa Panitch
- Biomedical Engineering Graduate Group, University of California Davis, Davis, CA, USA; Department of Surgery, University of California Davis, Sacramento, CA, USA; Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, USA.
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Flexible patch with printable and antibacterial conductive hydrogel electrodes for accelerated wound healing. Biomaterials 2022; 285:121479. [DOI: 10.1016/j.biomaterials.2022.121479] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 03/07/2022] [Accepted: 03/18/2022] [Indexed: 02/08/2023]
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3
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Soeiro VS, Silva-Carvalho R, Martins D, Parpot P, Grotto D, Chaud MV, da Gama FMP, Jozala AF. Alginate-amphotericin B nanocomplexes covered by nanocrystals from bacterial cellulose: physico-chemical characterization and in vitro toxicity. Sci Rep 2021; 11:23944. [PMID: 34907234 PMCID: PMC8671405 DOI: 10.1038/s41598-021-03264-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 12/01/2021] [Indexed: 11/17/2022] Open
Abstract
Nanocomplexes systems made up natural poylymers have pharmacotechnical advantages such as increase of water solubility and a decrease of drugs toxicity. Amphotericin B (AmB) is a drug apply as anti-leishmanial and anti-fungal, however it has low water solubility and high toxicity, limiting its therapeutic application. With this in mind, the present study aimed to produce nanocomplexes composed by alginate (Alg), a natural polymer, with AmB covered by nanocrystals from bacterial cellulose (CNC). For this reason, the nanocomplexes were produced utilizing sodium alginate, amphotericin B in a borate buffer (pH 11.0). The CNC was obtained by enzymatic hydrolysis of the bacterial cellulose. To CNC cover the nanocomplexes 1 ml of the nanocomplexes was added into 1 ml of 0.01% CNC suspension. The results showed an ionic adsorption of the CNC into the Alg-AmB nanocomplexes surface. This phenomena was confirmed by an increase in the particle size and PDI decrease. Besides, nanocomplexes samples covered by CNC showed uniformity. The amorphous inclusion of AmB complex into the polysaccharide chain network in both formulations. AmB in the nanocomplexes was in supper-aggregated form and showed good biocompatibility, being significantly less cytotoxic in vitro against kidney cells and significantly less hemolytic compared to the free-drug. The in vitro toxicity results indicated the Alg-AmB nanocomplexes can be considered a non-toxic alternative to improve the AmB therapeutic effect. All process to obtain nanocomplexes and it coat was conduce without organic solvents, can be considered a green process, and allowed to obtain water soluble particles. Furthermore, CNC covering the nanocomplexes brought additional protection to the system can contribut advancement in the pharmaceutical.
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Affiliation(s)
- Victória Soares Soeiro
- LAMINFE - Laboratory of Industrial Microbiology and Fermentation Process, University of Sorocaba, Sorocaba, Brazil.,CEB - Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Ricardo Silva-Carvalho
- CEB - Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Daniela Martins
- CEB - Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Pier Parpot
- CEB - Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal.,Centre of Chemistry, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Denise Grotto
- Lapetox - Laboratory of Toxicology Research, University of Sorocaba, Sorocaba, Brazil
| | - Marco Vinicius Chaud
- LABNUS - Biomaterials and Nanotechnology Laboratory, University of Sorocaba, Sorocaba, Brazil
| | | | - Angela Faustino Jozala
- LAMINFE - Laboratory of Industrial Microbiology and Fermentation Process, University of Sorocaba, Sorocaba, Brazil.
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Soeiro VS, Tundisi LL, Novaes LC, Mazzola PG, Aranha N, Grotto D, Júnior JM, Komatsu D, Gama FM, Chaud MV, Jozala AF. Production of bacterial cellulose nanocrystals via enzymatic hydrolysis and evaluation of their coating on alginate particles formed by ionotropic gelation. CARBOHYDRATE POLYMER TECHNOLOGIES AND APPLICATIONS 2021. [DOI: 10.1016/j.carpta.2021.100155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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5
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Nanostructured lipid carriers containing chitosan or sodium alginate for co-encapsulation of antioxidants and an antimicrobial agent for potential application in wound healing. Int J Biol Macromol 2021; 183:668-680. [PMID: 33930450 DOI: 10.1016/j.ijbiomac.2021.04.168] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 04/13/2021] [Accepted: 04/25/2021] [Indexed: 12/23/2022]
Abstract
The high incidence and costs of chronic wounds in the elderly have motivated the search for innovations to improve product performance and the healing process while reducing costs. In this study, bioadhesive nanostructured lipid carriers (NLC) were developed for the co-encapsulation of compounds with antioxidant (α-tocopherol and quercetin) and antimicrobial (tea tree oil) activity for management of wounds. The NLC was produced with shea butter and argan oil, and modified with sodium alginate or chitosan to confer bioadhesive properties. Spherical nanoparticles of ~307-330 nm and zeta potential varying from -21.2 to +11.8 mV were obtained. Thermal analysis demonstrated that the lipid matrix reduced tea tree oil thermal loss (~1.8-fold). Regardless of the type of polysaccharide employed, the NLCs promoted cutaneous localization of antioxidants in damaged (subjected to incision) skin, with a ~74 to 180-fold higher delivery into the skin compared to percutaneous delivery. This result is consistent with the similar bioadhesive properties of chitosan or sodium alginate-modified NLC. Nanoencapsulation of tea tree oil did not preclude its antimicrobial effects against susceptible and resistant strains of S. aureus and P. aeruginosa, while co-encapsulation of antioxidants increased the NLC-induced fibroblasts migration, supporting their potential usefulness for management of wounds.
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Santos RA, Rae M, Dartora VFMC, Matos JKR, Camarini R, Lopes LB. Bioresponsive nanostructured systems for sustained naltrexone release and treatment of alcohol use disorder: Development and biological evaluation. Int J Pharm 2020; 585:119474. [PMID: 32473371 DOI: 10.1016/j.ijpharm.2020.119474] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 05/22/2020] [Accepted: 05/24/2020] [Indexed: 01/16/2023]
Abstract
In this study, microemulsions capable of transforming into nanostructured hexagonal phase gels in vivo upon uptake of biological fluids for naltrexone prolonged release were investigated as a strategy for management of alcohol use disorder (AUD). Microemulsions were prepared using monoolein, tricaprylin, water and propylene glycol; after preliminary characterization, one formulation was selected, which contained 55% of monoolein-tricaprylin (M-55). This microemulsion displayed size below 200 nm and Newtonian rheological behavior. Liquid crystalline gels formed in vitro upon 8 h of contact with water following a second order kinetics. After 120 h, <50% of naltrexone was released in vitro independently on drug loading (5 or 10%). In vivo, gels formed within 24 h of M-55 subcutaneous administration, and persisted locally for over 30 days providing slow release of the fluorescent marker Alexa fluor compared to a solution. Using the conditioned place preference paradigm, a test used to measure drug's rewarding effects, a single dose of M-55 containing 5% naltrexone reduced the time spent in the ethanol-paired compartment by 1.8-fold compared to saline; this effect was similar to that obtained with daily naltrexone injections, demonstrating the formulation efficacy and its ability to reduce dosing frequency. A more robust effect was observed following administration of M-55 containing 10% of naltrexone, which was compatible with aversion. These results support M-55 as a platform for sustained release of drugs that can be further explored for management of AUD to reduce dosing frequency and aid treatment adherence.
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Affiliation(s)
- Rogério A Santos
- Department of Pharmacology, Instituto de Ciências Biomédicas - Universidade de Sao Paulo, Brazil
| | - Mariana Rae
- Department of Pharmacology, Instituto de Ciências Biomédicas - Universidade de Sao Paulo, Brazil
| | - Vanessa F M C Dartora
- Department of Pharmacology, Instituto de Ciências Biomédicas - Universidade de Sao Paulo, Brazil
| | - Jenyffer K R Matos
- Department of Pharmacology, Instituto de Ciências Biomédicas - Universidade de Sao Paulo, Brazil
| | - Rosana Camarini
- Department of Pharmacology, Instituto de Ciências Biomédicas - Universidade de Sao Paulo, Brazil
| | - Luciana B Lopes
- Department of Pharmacology, Instituto de Ciências Biomédicas - Universidade de Sao Paulo, Brazil.
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Passos JS, Martino LCD, Dartora VFC, Araujo GLBD, Ishida K, Lopes LB. Development, skin targeting and antifungal efficacy of topical lipid nanoparticles containing itraconazole. Eur J Pharm Sci 2020; 149:105296. [PMID: 32151706 DOI: 10.1016/j.ejps.2020.105296] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 03/01/2020] [Accepted: 03/04/2020] [Indexed: 11/20/2022]
Abstract
Considering the increased incidence of sporotrichosis and other fungal infections in rural and urban areas, and the limitations and adverse effects of oral itraconazole therapy, we studied nanostructured lipid carriers (NLC) as topical delivery systems to increase itraconazole localization in skin lesions and associate efficacy with reduced systemic exposure. Unloaded and itraconazole-loaded NLC showed nanometric size (~216-340 nm), negative zeta potential (~ -17 mV), and high entrapment efficiency (~97%). NLC treatment decreased transepidermal water loss, an index of cutaneous barrier function, in intact skin and in tissues damaged with a linear incision (to mimic lesions) by 23-36%, and reduced drug transdermal delivery by ~2-fold, demonstrating its ability to localize itraconazole within the skin. The unloaded and itraconazole-loaded NLC were considered safe, as indicated by scores of 0.5 and 0.6 in HET-CAM models, respectively, and lack of toxicity (measured by survival and health index) on the Galleria mellonella larvae. The values obtained for minimum inhibitory concentration and minimum fungicidal concentration on Sporothrix brasiliensis yeasts were 0.25 and 32 μg/mL, respectively. The drug in solution displayed similar values, indicating that encapsulation does not hinder itraconazole antifungal effect. NLC treatment improved the survival rate and health index of G. mellonella larvae infected with S. brasiliensis yeasts and C. albicans, demonstrating antifungal efficacy. Taken together, itraconazole encapsulation in NLC represents a viable strategy to optimize cutaneous localization without compromising its efficacy against fungal infections.
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Affiliation(s)
- Julia Sapienza Passos
- Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil; School of Pharmaceutical Sciences of São Paulo, University of São Paulo, São Paulo, SP, Brazil
| | - Luiza Capello de Martino
- Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil; School of Pharmaceutical Sciences of São Paulo, University of São Paulo, São Paulo, SP, Brazil
| | | | - Gabriel L B de Araujo
- School of Pharmaceutical Sciences of São Paulo, University of São Paulo, São Paulo, SP, Brazil
| | - Kelly Ishida
- Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Luciana B Lopes
- Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil.
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Pandit AP, Koyate KR, Kedar AS, Mute VM. Spongy wound dressing of pectin/carboxymethyl tamarind seed polysaccharide loaded with moxifloxacin beads for effective wound heal. Int J Biol Macromol 2019; 140:1106-1115. [PMID: 31470049 DOI: 10.1016/j.ijbiomac.2019.08.202] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 08/22/2019] [Accepted: 08/23/2019] [Indexed: 12/18/2022]
Abstract
An attempt was made to formulate moxifloxacin loaded alginate beads incorporated into spongy wound dressing to heal chronic wounds as well as to reduce frequency of painful dressing change. Moxifloxacin loaded beads (sodium alginate:pectin, 1:1) were prepared by ionic gelation method, with entrapment efficiency 94.52%, crushing strength 25.30 N and drug release 90.52%. Beads were further incorporated into wound dressing, made of pectin and carboxymethyl tamarind seed polysaccharide (CMTSP). Spongy wound dressing was obtained by freeze drying technology, which showed good folding endurance, high wound fluid absorption and good crushing strength. Drug release was found to be 85.09%. Dressing made of CMTSP:pectin (1.5:2) showed good water vapour transmission and antibacterial activity. Porous nature of dressing absorbed exudates of wound. Excision wound model in rats revealed wound healing within 17 days: groups I (control), II (moxifloxacin beads loaded wound dressing), III (moxifloxacin beads), IV (pectin film) and V (sodium alginate film) showed 65.28, 99.09, 86.90, 66.84 and 64.30% wound closure, respectively. To conclude, moxifloxacin beads loaded spongy wound dressing has good healing and wound closing potential compared to pectin film and moxifloxacin beads. Thus, the formulation is novel for biomedical application which reduced the frequency of painful dressing change.
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Affiliation(s)
- Ashlesha P Pandit
- Department of Pharmaceutics, JSPM Rajarshi Shahu College of Pharmacy and Research, Tathawade, Pune 411 033, Maharashtra, India.
| | - Kanchan R Koyate
- Department of Pharmaceutics, JSPM Rajarshi Shahu College of Pharmacy and Research, Tathawade, Pune 411 033, Maharashtra, India
| | - Ashwini S Kedar
- Department of Pharmaceutics, JSPM Rajarshi Shahu College of Pharmacy and Research, Tathawade, Pune 411 033, Maharashtra, India
| | - Vaishali M Mute
- Department of Pharmacology, JSPM Rajarshi Shahu College of Pharmacy and Research, Tathawade, Pune 411 033, Maharashtra, India
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Carvalho VFM, Salata GC, de Matos JKR, Costa-Fernandez S, Chorilli M, Steiner AA, de Araujo GLB, Silveira ER, Costa-Lotufo LV, Lopes LB. Optimization of composition and obtainment parameters of biocompatible nanoemulsions intended for intraductal administration of piplartine (piperlongumine) and mammary tissue targeting. Int J Pharm 2019; 567:118460. [PMID: 31247278 DOI: 10.1016/j.ijpharm.2019.118460] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 05/27/2019] [Accepted: 06/23/2019] [Indexed: 11/30/2022]
Abstract
As a new strategy for treatment of ductal carcinoma in situ, biocompatible and bioadhesive nanoemulsions for intraductal administration of the cytotoxic agent piplartine (piperlongumine) were optimized in this study. To confer bioadhesive properties, the nanoemulsion was modified with chitosan or hyaluronic acid. Tricaprylin was selected as the nanoemulsion non-polar phase due to its ability to dissolve larger drug amounts compared to isopropyl myristate and monocaprylin. Use of phosphatidylcholine as sole surfactant did not result in a homogeneous nanoemulsion, while its association with polysorbate 80 and glycerol (in a surfactant blend) led to the formation of nanoemulsions with droplet size of 76.5 ± 1.2 nm. Heating the aqueous phase to 50 °C enabled sonication time reduction from 20 to 10 min. Inclusion of either chitosan or hyaluronic acid resulted in nanoemulsions with similar in vitro bioadhesive potential, and comparable ability to prolong mammary tissue retention (to 120 h) in vivo without causing undesirable histological alterations. Piplartine was stable in both nanoemulsions for 60 days; however, the size of loaded NE-HA was maintained at a similar range for longer periods of time, suggesting that this nanoemulsion may be a stronger candidate for intraductal delivery.
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Affiliation(s)
- Vanessa F M Carvalho
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Giovanna C Salata
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Jenyffer K R de Matos
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Sandra Costa-Fernandez
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Marlus Chorilli
- School of Pharmaceutical Sciences at Araraquara, São Paulo State University, Araraquara, SP, Brazil
| | - Alexandre A Steiner
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | | | - Edilberto R Silveira
- Department of Inorganic and Organic Chemistry, Federal University of Ceará, Fortaleza, CE, Brazil
| | - Leticia V Costa-Lotufo
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Luciana B Lopes
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil.
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Bouissil S, Pierre G, Alaoui-Talibi ZE, Michaud P, El Modafar C, Delattre C. Applications of Algal Polysaccharides and Derivatives in Therapeutic and Agricultural Fields. Curr Pharm Des 2019; 25:1187-1199. [PMID: 31465279 DOI: 10.2174/1381612825666190425162729] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Accepted: 04/15/2019] [Indexed: 12/26/2022]
Abstract
BACKGROUND Recently, researchers have given more and more consideration to natural polysaccharides thanks to their huge properties such as stability, biodegradability and biocompatibility for food and therapeutics applications. METHODS a number of enzymatic and chemical processes were performed to generate bioactive molecules, such as low molecular weight fractions and oligosaccharides derivatives from algal polysaccharides. RESULTS These considerable characteristics allow algal polysaccharides and their derivatives such as low molecular weight polymers and oligosaccharides structures to have great potential to be used in lots of domains, such as pharmaceutics and agriculture etc. Conclusion: The present review describes the mains polysaccharides structures from Algae and focuses on the currents agricultural (fertilizer, bio-elicitor, stimulators, signaling molecules and activators) and pharmaceutical (wound dressing, tissues engineering and drugs delivery) applications by using polysaccharides and/or their oligosaccharides derivatives obtained by chemical, physical and enzymatic processes.
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Affiliation(s)
- Soukaina Bouissil
- Universite Cadi Ayyad, Laboratoire de Biotechnologie et Bioingenierie Moleculaire, Faculte des Sciences et Techniques, Marrakech, Morocco
- Universite Clermont Auvergne, CNRS, SIGMA Clermont, Institut Pascal, F-63000 Clermont-Ferrand, France
| | - Guillaume Pierre
- Universite Clermont Auvergne, CNRS, SIGMA Clermont, Institut Pascal, F-63000 Clermont-Ferrand, France
| | - Zainab El Alaoui-Talibi
- Universite Cadi Ayyad, Laboratoire de Biotechnologie et Bioingenierie Moleculaire, Faculte des Sciences et Techniques, Marrakech, Morocco
| | - Philippe Michaud
- Universite Clermont Auvergne, CNRS, SIGMA Clermont, Institut Pascal, F-63000 Clermont-Ferrand, France
| | - C El Modafar
- Universite Cadi Ayyad, Laboratoire de Biotechnologie et Bioingenierie Moleculaire, Faculte des Sciences et Techniques, Marrakech, Morocco
| | - Cedric Delattre
- Universite Clermont Auvergne, CNRS, SIGMA Clermont, Institut Pascal, F-63000 Clermont-Ferrand, France
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Migotto A, Carvalho VFM, Salata GC, da Silva FWM, Yan CYI, Ishida K, Costa-Lotufo LV, Steiner AA, Lopes LB. Multifunctional nanoemulsions for intraductal delivery as a new platform for local treatment of breast cancer. Drug Deliv 2018; 25:654-667. [PMID: 29495885 PMCID: PMC7011997 DOI: 10.1080/10717544.2018.1440665] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Considering that breast cancer usually begins in the lining of the ducts, local drug administration into the ducts could target cancers and pre-tumor lesions locally while reducing systemic adverse effects. In this study, a cationic bioadhesive nanoemulsion was developed for intraductal administration of C6 ceramide, a sphingolipid that mediates apoptotic and non-apoptotic cell death. Bioadhesive properties were obtained by surface modification with chitosan. The optimized nanoemulsion displayed size of 46.3 nm and positive charge, properties that were not affected by ceramide encapsulation (0.4%, w/w). C6 ceramide concentration necessary to reduce MCF-7 cells viability to 50% (EC50) decreased by 4.5-fold with its nanoencapsulation compared to its solution; a further decrease (2.6-fold) was observed when tributyrin (a pro-drug of butyric acid) was part of the oil phase of the nanocarrier, a phenomenon attributed to synergism. The unloaded nanocarrier was considered safe, as indicated by a score <0.1 in HET-CAM models, by the high survival rates of Galleria mellonella larvae exposed to concentrations ≤500 mg/mL, and absence of histological changes when intraductally administered in rats. Intraductal administration of the nanoemulsion prolonged drug localization for more than 120 h in the mammary tissue compared to its solution. These results support the advantage of the optimized nanoemulsion to enable mammary tissue localization of C6 ceramide.
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Affiliation(s)
- Amanda Migotto
- a Department of Pharmacology , Institute of Biomedical Sciences, University of Sao Paulo , Sao Paulo , Brazil
| | - Vanessa F M Carvalho
- a Department of Pharmacology , Institute of Biomedical Sciences, University of Sao Paulo , Sao Paulo , Brazil
| | - Giovanna C Salata
- a Department of Pharmacology , Institute of Biomedical Sciences, University of Sao Paulo , Sao Paulo , Brazil
| | - Fernanda W M da Silva
- b Department of Microbiology , Institute of Biomedical Sciences, University of Sao Paulo , Sao Paulo , Brazil
| | - Chao Yun Irene Yan
- c Department of Cell and Developmental Biology , Institute of Biomedical Sciences, University of Sao Paulo , Sao Paulo , Brazil
| | - Kelly Ishida
- b Department of Microbiology , Institute of Biomedical Sciences, University of Sao Paulo , Sao Paulo , Brazil
| | - Leticia V Costa-Lotufo
- a Department of Pharmacology , Institute of Biomedical Sciences, University of Sao Paulo , Sao Paulo , Brazil
| | - Alexandre A Steiner
- d Department of Immunology , Institute of Biomedical Sciences, University of Sao Paulo , Sao Paulo , Brazil
| | - Luciana B Lopes
- a Department of Pharmacology , Institute of Biomedical Sciences, University of Sao Paulo , Sao Paulo , Brazil
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Fabrication of Oxygen Releasing Scaffold by Embedding H2O2-PLGA Microspheres into Alginate-Based Hydrogel Sponge and Its Application for Wound Healing. APPLIED SCIENCES-BASEL 2018. [DOI: 10.3390/app8091492] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
In the regeneration process for new tissues, oxygen promotes re-epithelialization and healing of infected wounds, increases keratinocyte differentiation, proliferation and migration of fibroblast, and induces angiogenesis, collagen synthesis and wound contraction. Therefore, provision of oxygen to cells and tissues at an optimal level is critical for effective tissue regeneration and wound healing. In this study, we developed sustained oxygen-releasing polymeric microspheres and fabricated a sponge type dressing by embedding the microspheres into alginate-based hydrogel that can supply oxygen to wounds. We further investigated the applicability of the microspheres and hydrogel sponge to wound healing in vitro and in vivo. Oxygen-releasing microspheres (ORM) were made by incorporating hydrogen peroxide (H2O2) into poly(lactic-co-glycolic acid) (PLGA) using double emulsion method. H2O2-PLGA microspheres were embedded into alginate-based hydrogel to form a porous oxygen-releasing hydrogel sponge (ORHS). Biocompatibility was performed using cell counting kit-8. The oxygen release kinetic study was performed using a hydrogen peroxide assay kit and oxygen meter. The wound healing potential of ORHS was evaluated using the wound scratch model. In vivo studies were carried out to investigate the safety and efficacy of the ORHS for wound healing. Experimental results confirmed that oxygen released from ORMand ORHS induced neovascularization and promoted cell proliferation thereby facilitating effective wound healing. It is suggested that the ORM can be used for supplying oxygen to where cells and tissues are deprived of necessary oxygen, and ORHS is an intelligent scaffold to effectively heal wound by enhanced angiogenesis by oxygen. Conclusively, oxygen releasing polymeric microspheres and hydrogel scaffolds have potential for a variety of tissue engineering applications, where require oxygen.
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