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Escobar K, Carrera I, Naveas N, Pulido R, Manso M, Guarnieri JPDO, Lancellotti M, Cotta MA, Corrales-Ureña YR, Rischka K, Hernandez-Montelongo J. Functionalization of breast implants by cyclodextrin in-situ polymerization: a local drug delivery system for augmentation mammaplasty. Front Bioeng Biotechnol 2023; 11:1254299. [PMID: 37811378 PMCID: PMC10557261 DOI: 10.3389/fbioe.2023.1254299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 09/11/2023] [Indexed: 10/10/2023] Open
Abstract
Mammaplasty is a widely performed surgical procedure worldwide, utilized for breast reconstruction, in the context of breast cancer treatment, and aesthetic purposes. To enhance post-operative outcomes and reduce risks (hematoma with required evacuation, capsular contracture, implant-associated infection and others), the controlled release of medicaments can be achieved using drug delivery systems based on cyclodextrins (CDs). In this study, our objective was to functionalize commercially available silicone breast implants with smooth and textured surfaces through in-situ polymerization of two CDs: β-CD/citric acid and 2-hydroxypropyl-β-CD/citric acid. This functionalization serves as a local drug delivery system for the controlled release of therapeutic molecules that potentially can be a preventive treatment for post-operative complications in mammaplasty interventions. Initially, we evaluated the pre-treatment of sample surfaces with O2 plasma, followed by chitosan grafting. Subsequently, in-situ polymerization using both types of CDs was performed on implants. The results demonstrated that the proposed pre-treatment significantly increased the polymerization yield. The functionalized samples were characterized using microscopic and physicochemical techniques. To evaluate the efficacy of the proposed system for controlled drug delivery in augmentation mammaplasty, three different molecules were utilized: pirfenidone (PFD) for capsular contracture prevention, Rose Bengal (RB) as anticancer agent, and KR-12 peptide (KR-12) to prevent bacterial infection. The release kinetics of PFD, RB, and KR-12 were analyzed using the Korsmeyer-Peppas and monolithic solution mathematical models to identify the respective delivery mechanisms. The antibacterial effect of KR-12 was assessed against Staphylococcus epidermidis and Pseudomonas aeruginosa, revealing that the antibacterial rate of functionalized samples loaded with KR-12 was dependent on the diffusion coefficients. Finally, due to the immunomodulatory properties of KR-12 peptide on epithelial cells, this type of cells was employed to investigate the cytotoxicity of the functionalized samples. These assays confirmed the superior properties of functionalized samples compared to unprotected implants.
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Affiliation(s)
- Karen Escobar
- Department of Mathematical and Physical Sciences, UC Temuco, Temuco, Chile
| | - Ignacio Carrera
- Department of Mathematical and Physical Sciences, UC Temuco, Temuco, Chile
| | - Nelson Naveas
- Department of Applied Physics, Centre for Micro Analysis of Materials and Nicolás Cabrera Institute of Materials Science, Autonomous University of Madrid, Madrid, Spain
- Departamento de Ingeniería Química y Procesos de Minerales, Universidad de Antofagasta, Antofagasta, Chile
| | - Ruth Pulido
- Department of Applied Physics, Centre for Micro Analysis of Materials and Nicolás Cabrera Institute of Materials Science, Autonomous University of Madrid, Madrid, Spain
- Departamento de Química, Universidad de Antofagasta, Antofagasta, Chile
| | - Miguel Manso
- Department of Applied Physics, Centre for Micro Analysis of Materials and Nicolás Cabrera Institute of Materials Science, Autonomous University of Madrid, Madrid, Spain
| | | | - Marcelo Lancellotti
- Faculty of Pharmaceutical Sciences, State University of Campinas, Campinas, Brazil
| | - Monica A. Cotta
- Institute of Physics Gleb Wataghin, State University of Campinas, Campinas, Brazil
| | | | - Klaus Rischka
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials, Bremen, Germany
| | - Jacobo Hernandez-Montelongo
- Department of Mathematical and Physical Sciences, UC Temuco, Temuco, Chile
- Department of Translational Bioengineering, University of Guadalajara, Guadalajara, Mexico
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Hou L, Peng X, Wang R, Wang Y, Li H, Zhang H, Zhang Y, Zhang Z. Oral nano-formulation improves pancreatic islets dysfunction via lymphatic transport for antidiabetic treatment. Acta Pharm Sin B 2022. [PMID: 37521855 PMCID: PMC10373096 DOI: 10.1016/j.apsb.2022.12.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Type 2 diabetes mellitus (T2DM) therapy is facing the challenges of long-term medication and gradual destruction of pancreatic islet β-cells. Therefore, it is timely to develop oral prolonged action formulations to improve compliance, while restoring β-cells survival and function. Herein, we designed a simple nanoparticle with enhanced oral absorption and pancreas accumulation property, which combined apical sodium-dependent bile acid transporter-mediated intestinal uptake and lymphatic transportation. In this system, taurocholic acid (TCA) modified poly(lactic-co-glycolic acid) (PLGA) was employed to achieve pancreas location, hydroxychloroquine (HCQ) was loaded to execute therapeutic efficacy, and 1,2-dilauroyl-sn-glycero-3-phosphocholine (DLPC) was introduced as stabilizer together with synergist (PLGA-TCA/DLPC/HCQ). In vitro and in vivo results have proven that PLGA-TCA/DLPC/HCQ reversed the pancreatic islets damage and dysfunction, thus impeding hyperglycemia progression and restoring systemic glucose homeostasis via only once administration every day. In terms of mechanism PLGA-TCA/DLPC/HCQ ameliorated oxidative stress, remodeled the inflammatory pancreas microenvironment, and activated PI3K/AKT signaling pathway without obvious toxicity. This strategy not only provides an oral delivery platform for increasing absorption and pancreas targetability but also opens a new avenue for thorough T2DM treatment.
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Mazayen ZM, Ghoneim AM, Elbatanony RS, Basalious EB, Bendas ER. Pharmaceutical nanotechnology: from the bench to the market. FUTURE JOURNAL OF PHARMACEUTICAL SCIENCES 2022; 8:12. [PMID: 35071609 PMCID: PMC8760885 DOI: 10.1186/s43094-022-00400-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 01/01/2022] [Indexed: 12/24/2022] Open
Abstract
Background Nanotechnology is considered a new and rapidly emerging area in the pharmaceutical and medicinal field. Nanoparticles, as drug delivery systems, impart several advantages concerning improved efficacy as well as reduced adverse drug reactions. Main body Different types of nanosystems have been fabricated including carbon nanotubes, paramagnetic nanoparticles, dendrimers, nanoemulsions, etc. Physicochemical properties of the starting materials and the selected method of preparation play a significant aspect in determining the shape and characteristics of the developed nanoparticles. Dispersion of preformed polymers, coacervation, polymerization, nano-spray drying and supercritical fluid technology are among the most extensively used techniques for the preparation of nanocarriers. Particle size, surface charge, surface hydrophobicity and drug release are the main factors affecting nanoparticles physical stability and biological performance of the incorporated drug. In clinical practice, many nanodrugs have been used for both diagnostic and therapeutic applications and are being investigated for various indications in clinical trials. Nanoparticles are used for the cure of kidney diseases, tuberculosis, skin conditions, Alzheimer’s disease, different types of cancer as well as preparation of COVID-19 vaccines. Conclusion In this review, we will confer the advantages, types, methods of preparation, characterization methods and some of the applications of nano-systems.
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Dluska E, Markowska‐Radomska A, Metera A, Rudniak L, Kosicki K. Mass transfer of anti‐cancer drug delivery to brain tumors by a multiple emulsion‐based implant. AIChE J 2021. [DOI: 10.1002/aic.17501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Ewa Dluska
- Faculty of Chemical and Process Engineering Warsaw University of Technology Warsaw Poland
| | | | - Agata Metera
- Faculty of Chemical and Process Engineering Warsaw University of Technology Warsaw Poland
| | - Leszek Rudniak
- Faculty of Chemical and Process Engineering Warsaw University of Technology Warsaw Poland
| | - Konrad Kosicki
- Faculty of Biology, Institute of Genetics & Biotechnology University of Warsaw Warsaw Poland
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Abstract
Melanoma in-transit metastases (ITMs) can sometimes be difficult to manage by surgical excision due to their number, size or location. Treatment by intralesional injection of PV-10, a 10% solution of rose bengal, has been reported to be a simple, safe and effective alternative, but more outcome data are required to confirm its value in the management of ITMs. Two hundred and twenty-six melanoma ITMs in 48 patients were treated with intralesional PV-10 supplied under a special-access scheme. By 8 weeks a complete response in all injected ITMs was achieved in 22 patients (46%) and a partial response in 19 patients (40%). Of 19 patients who had uninjected metastases, 3 (16%) had a response in these. The most common adverse event was transient localised pain in injected tumours. New ITMs developed in 25 patients within 8 weeks, and later in another 8 patients. Repeat injection cycles were given to 21 patients: 13 of these received repeat injection into partially responding or nonresponding tumours, 5 had new ITMs, as well as partially-responding lesions injected, and 3 received injection into new ITMs only. Twenty-two patients received subsequent systemic therapy. At 1 year 37 of the 48 patients were alive, 28 with melanoma, and at 2 years 27 were alive, and 19 with melanoma. Injection of PV-10 was simple and safe and resulted in tumour involution in most patients and sometimes in noninjected tumours. However, many patients developed new lesions; these were treated by further PV-10 injections or with alternative therapies.
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Wang HY, Hou L, Li HL, Wang X, Cao Y, Zhang BY, Wang JT, Wei SJ, Dang HW, Ran HT. A nanosystem loaded with perfluorohexane and rose bengal coupled upconversion nanoparticles for multimodal imaging and synergetic chemo-photodynamic therapy of cancer. Biomater Sci 2021; 8:2488-2506. [PMID: 32211626 DOI: 10.1039/c9bm02081k] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Theranostics is a new trend integrating diagnostic and therapeutic functions in tumour research. Theranostic nanoparticles enabling both tumour imaging and drug delivery are a promising platform for image-guided cancer therapy. Photodynamic therapy (PDT) has great potential in synergy with traditional chemotherapy but faces great challenges due to hypoxia, poor targeting ability and the limited penetration depth of visible light. To solve these problems, we presented a novel nanosystem of FA/UCNPs-RB/HCPT/PFH@lipid (denoted as FURH-PFH-NPs), with a perfluorohexane (PFH) carrying rich oxygen core and a folic acid-modified lipid shell. The shell contains 10-hydroxycamptothecin (HCPT) and self-fluorescing photosensitizer compounds, namely, upconversion nanoparticles and rose bengal (UCNPs-RB). In this study, FURH-PFH-NPs aggregated in SKOV3 cells (in vitro) and the nude xenograft tumour region when combined with folic acid receptors. When triggered by low-intensity focused ultrasound (LIFU), FURH-PFH-NPs released PFH, UCNPs-RB and HCPT. The above procedure was monitored through multimodal imaging, which simultaneously guided the tumour therapy. UCNPs-RB and PFH promoted the PDT effect under LIFU. Through PDT and HCPT, we obtained better therapeutic effects and good biosafety against SKOV3 nude xenograft tumours. FURH-PFH-NPs combined with LIFU and laser irradiation might be a promising strategy for ovarian cancer.
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Affiliation(s)
- Hai-Yan Wang
- Institute of Ultrasound Imaging & Department of Ultrasound, The Second Affiliated Hospital of Chongqing Medical University, 400010 Chongqing, People's Republic of China. and Chongqing Key Laboratory of Ultrasound Molecular Imaging, 400010 Chongqing, People's Republic of China. and Department of Gynaecology, General Hospital of Ningxia Medical University, Yinchuan, 750004, Ningxia, P.R. China
| | - Li Hou
- Department of Otolaryngology, Head and Neck Surgery, General Hospital of Ningxia Medical University, Yinchuan, 750004, Ningxia, P.R. China
| | - Hai-Liang Li
- Department of Radiation Oncology, General Hospital of Ningxia Medical University, Yinchuan, 750004, Ningxia, P.R. China
| | - Xu Wang
- Department of Neurosurgery, 1st Hospital of Yin Chuan, 2nd Affiliated Hospital of Ningxia Medical University, Yinchuan, 750004, P.R. China
| | - Yang Cao
- Institute of Ultrasound Imaging & Department of Ultrasound, The Second Affiliated Hospital of Chongqing Medical University, 400010 Chongqing, People's Republic of China. and Chongqing Key Laboratory of Ultrasound Molecular Imaging, 400010 Chongqing, People's Republic of China.
| | - Bo-Yu Zhang
- School of Clinical Medicine Fujian Medical University, Fuzhou, 350000, P.R. China
| | - Jing-Tao Wang
- School of Pharmaceutical Science, Southwest University, Chongqing, 40071, P. R. China
| | - Shi-Jie Wei
- Institute of Clinical Pharmacology and Department of Pharmacy, General Hospital of Ningxia Medical University, Yinchuan, 750004, Ningxia, P.R. China
| | - Hong-Wan Dang
- Institute of Clinical Pharmacology and Department of Pharmacy, General Hospital of Ningxia Medical University, Yinchuan, 750004, Ningxia, P.R. China
| | - Hai-Tao Ran
- Institute of Ultrasound Imaging & Department of Ultrasound, The Second Affiliated Hospital of Chongqing Medical University, 400010 Chongqing, People's Republic of China. and Chongqing Key Laboratory of Ultrasound Molecular Imaging, 400010 Chongqing, People's Republic of China.
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Sánchez-Ramírez DR, Domínguez-Ríos R, Juárez J, Valdés M, Hassan N, Quintero-Ramos A, Del Toro-Arreola A, Barbosa S, Taboada P, Topete A, Daneri-Navarro A. Biodegradable photoresponsive nanoparticles for chemo-, photothermal- and photodynamic therapy of ovarian cancer. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 116:111196. [PMID: 32806317 DOI: 10.1016/j.msec.2020.111196] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 05/19/2020] [Accepted: 06/16/2020] [Indexed: 12/20/2022]
Abstract
Ovarian cancer (OC) is the deadliest gynecological cancer. Standard treatment of OC is based on cytoreductive surgery followed by chemotherapy with platinum drugs and taxanes; however, innate and acquired drug-resistance is frequently observed followed by a relapse after treatment, thus, more efficient therapeutic approaches are required. Combination therapies involving phototherapies and chemotherapy (the so-called chemophototherapy) may have enhanced efficacy against cancer, by attacking cancer cells through different mechanisms, including DNA-damage and thermally driven cell membrane and cytoskeleton damage. We have designed and synthesized poly(lactic-co-glycolic) nanoparticles (PLGA NPs) containing the chemo-drug carboplatin (CP), and the near infrared (NIR) photosensitizer indocyanine green (ICG). We have evaluated the drug release profile, the photodynamic ROS generation and photothermal capacities of the NPs. Also, the antitumoral efficiency of the NPs was evaluated using the SKOV-3 cell line as an in vitro OC model, observing an enhanced cytotoxic effect when irradiating cells with an 800 nm laser. Evidence here shown supports the potential application of the biodegradable photoresponsive NPs in the clinical stage due to the biocompatibility of the materials used, the spatiotemporal control of the therapy and, also, the less likely development of resistance against the combinatorial therapy.
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Affiliation(s)
- Dante R Sánchez-Ramírez
- Laboratorio de Inmunología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara 44340, Mexico
| | - Rossina Domínguez-Ríos
- Laboratorio de Inmunología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara 44340, Mexico
| | - Josué Juárez
- Departamento de Física, Universidad de Sonora, Unidad Centro, Hermosillo, Sonora 83000, Mexico
| | - Miguel Valdés
- Departamento de Física, Universidad de Sonora, Unidad Centro, Hermosillo, Sonora 83000, Mexico
| | - Natalia Hassan
- Programa Institucional de Fomento a la I+D+i, Universidad Tecnológica Metropolitana, San Joaquín 2409, Chile
| | - Antonio Quintero-Ramos
- Laboratorio de Inmunología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara 44340, Mexico
| | - Alicia Del Toro-Arreola
- Laboratorio de Inmunología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara 44340, Mexico
| | - Silvia Barbosa
- Departamento de Física de Partículas, Instituto de Investigaciones Sanitarias (IDIS) y Agrupación Estratégica de Materiales, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Pablo Taboada
- Departamento de Física de Partículas, Instituto de Investigaciones Sanitarias (IDIS) y Agrupación Estratégica de Materiales, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Antonio Topete
- Laboratorio de Inmunología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara 44340, Mexico.
| | - Adrián Daneri-Navarro
- Laboratorio de Inmunología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara 44340, Mexico.
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Photodynamic-based therapeutic modalities to fight against cancer – A review from synergistic viewpoint. J Drug Deliv Sci Technol 2019. [DOI: 10.1016/j.jddst.2019.02.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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Domínguez-Ríos R, Sánchez-Ramírez DR, Ruiz-Saray K, Oceguera-Basurto PE, Almada M, Juárez J, Zepeda-Moreno A, Del Toro-Arreola A, Topete A, Daneri-Navarro A. Cisplatin-loaded PLGA nanoparticles for HER2 targeted ovarian cancer therapy. Colloids Surf B Biointerfaces 2019; 178:199-207. [PMID: 30856589 DOI: 10.1016/j.colsurfb.2019.03.011] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 03/02/2019] [Accepted: 03/05/2019] [Indexed: 01/15/2023]
Abstract
The conventional treatment (cytoreduction combined with cisplatin/carboplatin and taxane drugs) of ovarian cancer has a high rate of failure and recurrence despite a favorable initial response. This lack of success is usually attributed to the development of multidrug resistance mechanisms by cancer cells and avoidance of the anti-growth effects of monoclonal targeted therapeutic antibodies. The disease, like other cancers, is characterized by the overexpression of molecular markers, including HER2 receptors. Preclinical and clinical studies with trastuzumab, a HER2-targeted therapeutic antibody, reveal a low improvement of the outcomes of HER2 positive ovarian cancer patients. Therefore, here, we propose a cisplatin-loaded, HER2 targeted poly(lactic-co-glycolic) nanoplatform, a system capable to escape the drug-efflux effect and to take advantage of the overexpressed HER2 receptors, using them as docks for targeted chemotherapy. The NP/trastuzumab ratio was determined after fluorescein labeling of antibodies and quantification of fluorescence in NPs. The system was also characterized in terms of size, zeta potential, drug release kinetics, cytotoxicity and cellular internalization in the epithelial ovarian cancer cell line SKOV-3, and compared with the HER2 negative breast cancer cell line HCC70. Our results show an increased cytotoxicity of NPs as compared to free cisplatin, and moreover, an enhanced internalization and cytotoxicity due to the bionfunctionalization of NPs with the monoclonal antibody.
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Affiliation(s)
- Rossina Domínguez-Ríos
- Laboratorio de Inmunología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara, 44340, Mexico
| | - Dante R Sánchez-Ramírez
- Laboratorio de Inmunología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara, 44340, Mexico
| | - Kassandra Ruiz-Saray
- Laboratorio de Inmunología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara, 44340, Mexico
| | - Paola E Oceguera-Basurto
- Laboratorio de Inmunología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara, 44340, Mexico
| | - Mario Almada
- Departamento de Ciencias Químico Biológicas y Agropecuarias, Universidad de Sonora, Unidad Regional Sur, Lázaro Cárdenas 100, Colonia Francisco Villa, Navojoa, Sonora C.P. 85880, Mexico
| | - Josué Juárez
- Departamento de Física, Universidad de Sonora, Unidad Centro, Hermosillo, Sonora, 83000, Mexico
| | - Abraham Zepeda-Moreno
- Instituto de Investigación en Cáncer de la Infancia y la Adolescencia (INICIA), Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara, 44340, Mexico
| | - Alicia Del Toro-Arreola
- Laboratorio de Inmunología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara, 44340, Mexico
| | - Antonio Topete
- Laboratorio de Inmunología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara, 44340, Mexico.
| | - Adrián Daneri-Navarro
- Laboratorio de Inmunología, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud (CUCS), Universidad de Guadalajara, Guadalajara, 44340, Mexico
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Chaparro FJ, Presley KF, Coutinho da Silva MA, Lannutti JJ. Sintered electrospun polycaprolactone for controlled model drug delivery. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 99:112-120. [PMID: 30889645 DOI: 10.1016/j.msec.2019.01.095] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 12/21/2018] [Accepted: 01/18/2019] [Indexed: 01/05/2023]
Abstract
Electrospinning has been used widely for drug delivery applications due to its versatility and ease of modification of spun fiber properties. Net drug loading and release is typically limited by the inherent surface-area of the sample. In a relatively novel approach, sintering of electrospun fiber was used to create a capsule favoring long-term delivery. We showed that electrospun polycaprolactone (PCL) retained its initial morphology out to 1042 days of in vitro exposure, illustrating its potential for extended performance. Sintering decreased the electrospun pore size by 10- and 28-fold following 56 and 57 °C exposures, respectively. At 58 and 59 °C, the PCL capsules lost all apparent surface porosity, but entrapped pores were observed in the 58 °C cross-section. The use of Rhodamine B (RhB, 479.02 g mol-1), Rose Bengal (RB, 1017.64 g mol-1) and albumin-fluorescein isothiocyanate conjugate from bovine serum (BSA-FITC, ~66,000 g mol-1) as model compounds demonstrated that release (RhB > RB ≫ BSA-FITC) is controlled both by molecular weight and available porosity. Interestingly, the ranking of release following sintering was 57 > 56 > 59 > 58 °C; COMSOL simulations explored the effects of capsule wall thickness and porosity on release rate. It was hypothesized that model drug adsorption on the available fiber surface-area (57 versus 56 °C) and entrapped porosity (59 versus 58 °C) could have also attributed to the observed ranking of release rates. While the 56 and 57 °C exposures allowed the bulk of the release to occur in <1 day, the capsules sintered at 58 and 59 °C exhibited release that continued after 12 days of exposure.
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Affiliation(s)
- Francisco J Chaparro
- Department of Materials Science and Engineering, The Ohio State University, 2041 College Road, Columbus, OH 43210, USA
| | - Kayla F Presley
- Department of Materials Science and Engineering, The Ohio State University, 2041 College Road, Columbus, OH 43210, USA
| | - Marco A Coutinho da Silva
- Department of Veterinary Clinical Sciences, The Ohio State University, 601 Vernon Tharp St., Columbus, OH 43210, USA
| | - John J Lannutti
- Department of Materials Science and Engineering, The Ohio State University, 2041 College Road, Columbus, OH 43210, USA.
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Vt A, Paramanantham P, Sb SL, Sharan A, Alsaedi MH, Dawoud TMS, Asad S, Busi S. Antimicrobial photodynamic activity of rose bengal conjugated multi walled carbon nanotubes against planktonic cells and biofilm of Escherichia coli. Photodiagnosis Photodyn Ther 2018; 24:300-310. [PMID: 30342101 DOI: 10.1016/j.pdpdt.2018.10.013] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 10/12/2018] [Accepted: 10/15/2018] [Indexed: 11/30/2022]
Abstract
BACKGROUND The global threat of antimicrobial resistance especially due to the bacterial biofilms has engaged researchers in the search of new treatment modalities. Antimicrobial photodynamic inactivation (aPDI) is one of the alternative treatment modalities which kills bacteria by generating endogenous reactive oxygen species (ROS). In this work authors evaluated the antibacterial and antibiofilm efficacy of rose Bengal (RB) conjugated to CNT against E. coli. METHODS The interaction of anionic dye to the CNT was studied using UV-vis spectroscopy, HRTEM, FTIR and spectrofluorometry. Phototoxicity of RBCNT conjugate against E. coli was studied using a green light of 50 mW and radiant exposure of 1674.7 J/ cm2 for 10 min. The antibiofilm activity and mechanism of action of RBCNT conjugate in presence of light was evaluated. RESULTS The loading and encapsulation was found to be 15.46 ± 1.05 and 61.85 ± 4.23% respectively. The photodynamic inactivation of planktonic cells of E. coli was found to 5.46 and 3.56 log10 CFU/ml reduction on treatment with RBCNT and RB respectively. The conjugate also exhibited efficient and enhanced antibiofilm activity against E. coli. The study of mechanism of action has confirmed cell membrane and DNA damage were the two main targets of aPDI. CONCLUSION This report has concluded the efficient photodynamic inactivation occurred in Gram negative bacteria E. coli due to the increased production of ROS inside the bacterial cells. Hence, the newly synthesized RBCNT conjugate can be efficiently utilized to control infections caused by E. coli.
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Affiliation(s)
- Anju Vt
- Department of Microbiology, School of Life Sciences, Pondicherry University, Puducherry, 605 014, India
| | - Parasuraman Paramanantham
- Department of Microbiology, School of Life Sciences, Pondicherry University, Puducherry, 605 014, India
| | - Sruthil Lal Sb
- Department of Physics, School of Physical, Chemical & Applied Sciences, Pondicherry University, Puducherry, 605014, India
| | - Alok Sharan
- Department of Physics, School of Physical, Chemical & Applied Sciences, Pondicherry University, Puducherry, 605014, India
| | - Marzouq H Alsaedi
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Turki M S Dawoud
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Syed Asad
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Siddhardha Busi
- Department of Microbiology, School of Life Sciences, Pondicherry University, Puducherry, 605 014, India.
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