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Egle K, Dohle E, Hoffmann V, Salma I, Al-Maawi S, Ghanaati S, Dubnika A. Fucoidan/chitosan hydrogels as carrier for sustained delivery of platelet-rich fibrin containing bioactive molecules. Int J Biol Macromol 2024; 262:129651. [PMID: 38280707 DOI: 10.1016/j.ijbiomac.2024.129651] [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: 08/23/2023] [Revised: 01/17/2024] [Accepted: 01/18/2024] [Indexed: 01/29/2024]
Abstract
Platelet-rich fibrin (PRF), derived from human blood, rich in wound healing components, has drawbacks in direct injections, such as rapid matrix degradation and growth factor release. Marine polysaccharides, mimicking the human extracellular matrix, show promising potential in tissue engineering. In this study, we impregnated the self-assembled fucoidan/chitosan (FU_CS) hydrogels with PRF obtaining PRF/FU_CS hydrogels. Our objective was to analyze the properties of a hydrogel and the sustained release of growth factors from the hydrogel that incorporates PRF. The results of SEM and BET-BJH demonstrated the relatively porous nature of the FU_CS hydrogels. ELISA data showed that combining FU_CS hydrogel with PRF led to a gradual 7-day sustained release of growth factors (VEGF, EGF, IL-8, PDGF-BB, TGF-β1), compared to pure PRF. Histology confirmed ELISA data, demonstrating uniform PRF fibrin network distribution within the FU_CS hydrogel matrix. Furthermore, the FU_CS hydrogels revealed excellent cell viability. The results revealed that the PRF/FU_CS hydrogel has the potential to promote wound healing and tissue regeneration. This would be the first step in the search for improved growth factor release.
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Affiliation(s)
- Karina Egle
- Institute of Biomaterials and Bioengineering, Faculty of Natural Science and Technology, Riga Technical University, LV-1048 Riga, Latvia; Baltic Biomaterials Centre of Excellence, Headquarters at Riga Technical University, LV-1048 Riga, Latvia.
| | - Eva Dohle
- FORM, Frankfurt Oral Regenerative Medicine, Clinic for Maxillofacial and Plastic Surgery, Johann Wolfgang Goethe University, 60590 Frankfurt am Main, Germany
| | - Verena Hoffmann
- FORM, Frankfurt Oral Regenerative Medicine, Clinic for Maxillofacial and Plastic Surgery, Johann Wolfgang Goethe University, 60590 Frankfurt am Main, Germany
| | - Ilze Salma
- Baltic Biomaterials Centre of Excellence, Headquarters at Riga Technical University, LV-1048 Riga, Latvia; Institute of Stomatology, Riga Stradins University, LV-1007 Riga, Latvia
| | - Sarah Al-Maawi
- FORM, Frankfurt Oral Regenerative Medicine, Clinic for Maxillofacial and Plastic Surgery, Johann Wolfgang Goethe University, 60590 Frankfurt am Main, Germany
| | - Shahram Ghanaati
- FORM, Frankfurt Oral Regenerative Medicine, Clinic for Maxillofacial and Plastic Surgery, Johann Wolfgang Goethe University, 60590 Frankfurt am Main, Germany.
| | - Arita Dubnika
- Institute of Biomaterials and Bioengineering, Faculty of Natural Science and Technology, Riga Technical University, LV-1048 Riga, Latvia; Baltic Biomaterials Centre of Excellence, Headquarters at Riga Technical University, LV-1048 Riga, Latvia.
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Wu S, Shan Z, Xie L, Su M, Zeng P, Huang P, Zeng L, Sheng X, Li Z, Zeng G, Chen Z, Chen Z. Mesopore Controls the Responses of Blood Clot-Immune Complex via Modulating Fibrin Network. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2103608. [PMID: 34821070 PMCID: PMC8787416 DOI: 10.1002/advs.202103608] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 10/24/2021] [Indexed: 06/13/2023]
Abstract
Formation of blood clots, particularly the fibrin network and fibrin network-mediated early inflammatory responses, plays a critical role in determining the eventual tissue repair or regeneration following an injury. Owing to the potential role of fibrin network in mediating clot-immune responses, it is of great importance to determine whether clot-immune responses can be regulated via modulating the parameters of fibrin network. Since the diameter of D-terminal of a fibrinogen molecule is 9 nm, four different pore sizes (2, 8, 14, and 20 nm) are rationally selected to design mesoporous silica to control the fibrinogen adsorption and modulate the subsequent fibrin formation process. The fiber becomes thinner and the contact area with macrophages decreases when the pore diameters of mesoporous silica are greater than 9 nm. Importantly, these thinner fibers grown in pores with diameters larger than 9 nm inhibit the M1-polorazation of macrophages and reduce the productions of pro-inflammatory cytokines and chemokines by macrophages. These thinner fibers reduce inflammation of macrophages through a potential signaling pathway of cell adhesion-cytoskeleton assembly-inflammatory responses. Thus, the successful regulation of the clot-immune responses via tuning of the mesoporous pore sizes indicates the feasibility of developing advanced clot-immune regulatory materials.
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Affiliation(s)
- Shiyu Wu
- Hospital of StomatologyGuanghua School of StomatologySun Yat‐sen University and Guangdong Provincial Key Laboratory of StomatologyGuangzhou510055China
| | - Zhengjie Shan
- Hospital of StomatologyGuanghua School of StomatologySun Yat‐sen University and Guangdong Provincial Key Laboratory of StomatologyGuangzhou510055China
- Department of MicrobiologyZhongshan School of MedicineSun Yat‐sen UniversityGuangzhou510080China
| | - Lv Xie
- Hospital of StomatologyGuanghua School of StomatologySun Yat‐sen University and Guangdong Provincial Key Laboratory of StomatologyGuangzhou510055China
| | - Mengxi Su
- Hospital of StomatologyGuanghua School of StomatologySun Yat‐sen University and Guangdong Provincial Key Laboratory of StomatologyGuangzhou510055China
| | - Peisheng Zeng
- Hospital of StomatologyGuanghua School of StomatologySun Yat‐sen University and Guangdong Provincial Key Laboratory of StomatologyGuangzhou510055China
| | - Peina Huang
- Hospital of StomatologyGuanghua School of StomatologySun Yat‐sen University and Guangdong Provincial Key Laboratory of StomatologyGuangzhou510055China
| | - Lingchan Zeng
- Clinical Research CenterDepartment of Medical Records ManagementGuanghua School of StomatologyHospital of StomatologySun Yat‐sen UniversityGuangzhou510055China
| | - Xinyue Sheng
- Hospital of StomatologyGuanghua School of StomatologySun Yat‐sen University and Guangdong Provincial Key Laboratory of StomatologyGuangzhou510055China
| | - Zhipeng Li
- Hospital of StomatologyGuanghua School of StomatologySun Yat‐sen University and Guangdong Provincial Key Laboratory of StomatologyGuangzhou510055China
| | - Gucheng Zeng
- Department of MicrobiologyZhongshan School of MedicineSun Yat‐sen UniversityGuangzhou510080China
| | - Zhuofan Chen
- Hospital of StomatologyGuanghua School of StomatologySun Yat‐sen University and Guangdong Provincial Key Laboratory of StomatologyGuangzhou510055China
| | - Zetao Chen
- Hospital of StomatologyGuanghua School of StomatologySun Yat‐sen University and Guangdong Provincial Key Laboratory of StomatologyGuangzhou510055China
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Wan B, Andhariya JV, Bao Q, Wang Y, Zou Y, Burgess DJ. Effect of polymer source on in vitro drug release from PLGA microspheres. Int J Pharm 2021; 607:120907. [PMID: 34332059 DOI: 10.1016/j.ijpharm.2021.120907] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 07/13/2021] [Accepted: 07/18/2021] [Indexed: 12/28/2022]
Abstract
Determination of the qualitative (Q1) sameness of poly (lactic-co-glycolic acid) (PLGA) polymers can be very challenging due to PLGA being a random copolymer with inherent heterogeneity. Performance variation of PLGA microsphere drug product as a result of altered PLGA characteristics has been recognized as a critical limiting factor in product development. It has been reported that PLGA characteristics and degradation profiles are sensitive to minor differences in the manufacturing and control processes. Accordingly, the objectives of the present research were: 1) to determine minor differences in the physicochemical properties (such as inherent viscosity/molecular weight (Mw), blockiness, and glass transition temperature (Tg)) and the hydrolytic degradation profiles of PLGA polymers from different sources; and 2) to investigate the impact of any differences determined in (1) on the physicochemical properties (Q3) and in vitro release of leuprolide acetate microspheres. PLGA polymers were purchased from three different sources with similar inherent viscosity/Mw, monomer (Lactide/Glycolide) ratio, and end group as per the manufacturers' certificate of analysis (COA). These PLGA polymers were evaluated using the same in-house methods and showed differences in their properties such as Mw and blockiness. Three compositionally equivalent leuprolide acetate microspheres were prepared via a solvent evaporation method using the three PLGA polymers from different sources. The prepared microspheres showed differences in their physicochemical properties (such as particle size, porosity and average pore diameter) as well as in their in vitro drug release characteristics (burst effect and release rate). These results indicate that polymer source related variations have the potential to significantly impact the Q3 sameness and therapeutic performance of long-acting PLGA microspheres. The fundamental understanding gained on polymer properties will make a critical contribution to the development of quality control strategies as well as to future regulatory guidance on the evaluation of such complex drug products.
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Affiliation(s)
- Bo Wan
- University of Connecticut, Department of Pharmaceutical Sciences, Storrs CT 06269, United States
| | - Janki V Andhariya
- University of Connecticut, Department of Pharmaceutical Sciences, Storrs CT 06269, United States
| | - Quanying Bao
- University of Connecticut, Department of Pharmaceutical Sciences, Storrs CT 06269, United States
| | - Yan Wang
- FDA/CDER, Office of Generic Drugs, Office of Research and Standards, Silver Spring MD 20993, United States
| | - Yuan Zou
- FDA/CDER, Office of Generic Drugs, Office of Research and Standards, Silver Spring MD 20993, United States
| | - Diane J Burgess
- University of Connecticut, Department of Pharmaceutical Sciences, Storrs CT 06269, United States.
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Kamali Shahri SM, Sharifi S, Mahmoudi M. Interdependency of influential parameters in therapeutic nanomedicine. Expert Opin Drug Deliv 2021; 18:1379-1394. [PMID: 33887999 DOI: 10.1080/17425247.2021.1921732] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Introduction:Current challenges to successful clinical translation of therapeutic nanomedicine have discouraged many stakeholders, including patients. Significant effort has been devoted to uncovering the reasons behind the less-than-expected success, beyond failures or ineffectiveness, of therapeutic nanomedicine products (e.g. cancer nanomedicine). Until we understand and address the factors that limit the safety and efficacy of NPs, both individually and in combination, successful clinical development will lag.Areas covered:This review highlights the critical roles of interdependent factors affecting the safety and therapeutic efficacy of therapeutic NPs for drug delivery applications.Expert opinion:Deep analysis of the current nanomedical literature reveals ahistory of unanticipated complexity by awide range of stakeholders including researchers. In the manufacture of nanomedicines themselves, there have been persistent difficulties with reproducibility and batch-to-batch variation. The unanticipated complexity and interdependency of nano-bio parameters has delayed our recognition of important factors affecting the safety and therapeutic efficacy of nanomedicine products. These missteps have had many factors including our lack of understanding of the interdependency of various factors affecting the biological identity and fate of NPs and biased interpretation of data. All these issues could raise significant concern regarding the reproducibility- or even the validity- of past publications that in turn formed the basis of many clinical trials of therapeutic nanomedicines. Therefore, the individual and combined effects of previously overlooked factors on the safety and therapeutic efficacy of NPs need to be fully considered in nanomedicine reports and product development.
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Affiliation(s)
- Seyed Mehdi Kamali Shahri
- Department of Radiology and Precision Health Program, College of Human Medicine, Michigan State University, East Lansing, MI, USA
| | - Shahriar Sharifi
- Department of Radiology and Precision Health Program, College of Human Medicine, Michigan State University, East Lansing, MI, USA
| | - Morteza Mahmoudi
- Department of Radiology and Precision Health Program, College of Human Medicine, Michigan State University, East Lansing, MI, USA
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Lee SS, Kim JH, Jeong J, Kim SHL, Koh RH, Kim I, Bae S, Lee H, Hwang NS. Sequential growth factor releasing double cryogel system for enhanced bone regeneration. Biomaterials 2020; 257:120223. [DOI: 10.1016/j.biomaterials.2020.120223] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 06/26/2020] [Accepted: 07/03/2020] [Indexed: 12/14/2022]
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6
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Rosenberg M, Shilo D, Galperin L, Capucha T, Tarabieh K, Rachmiel A, Segal E. Bone Morphogenic Protein 2-Loaded Porous Silicon Carriers for Osteoinductive Implants. Pharmaceutics 2019; 11:E602. [PMID: 31726775 PMCID: PMC6920899 DOI: 10.3390/pharmaceutics11110602] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 11/07/2019] [Accepted: 11/08/2019] [Indexed: 12/19/2022] Open
Abstract
Bone morphogenetic proteins (BMPs) are probably the most important growth factors in bone formation and healing. However, the utilization of BMPs in clinical applications is mainly limited due to the protein poor solubility at physiological pH, rapid clearance and relatively short biological half-life. Herein, we develop degradable porous silicon (PSi)-based carriers for sustained delivery of BMP-2. Two different loading approaches are examined, physical adsorption and covalent conjugation, and their effect on the protein loading and release rate is thoroughly studied. The entrapment of the protein within the PSi nanostructures preserved its bioactivity for inducing osteogenic differentiation of rabbit bone marrow mesenchymal stems cells (BM-MSCs). BM-MSCs cultured with the BMP-2 loaded PSi carriers exhibit a relatively high alkaline phosphatase (ALP) activity. We also demonstrate that exposure of MSCs to empty PSi (no protein) carriers generates some extent of differentiation due to the ability of the carrier's degradation products to induce osteoblast differentiation. Finally, we demonstrate the integration of these promising BMP-2 carriers within a 3D-printed patient-specific implant, constructed of poly(caprolactone) (PCL), as a potential bone graft for critical size bone defects.
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Affiliation(s)
- Michal Rosenberg
- Department of Biotechnology and Food Engineering, Technion—Israel Institute of Technology, Haifa 3200003, Israel; (M.R.); (L.G.)
| | - Dekel Shilo
- Department of Oral and Maxillofacial Surgery, Rambam Health Care Campus, Haifa 3109601, Israel; (D.S.); (T.C.); (K.T.); (A.R.)
- Bruce Rappaport Faculty of Medicine, Technion—Israel Institute of Technology, Haifa 3109601, Israel
| | - Leonid Galperin
- Department of Biotechnology and Food Engineering, Technion—Israel Institute of Technology, Haifa 3200003, Israel; (M.R.); (L.G.)
| | - Tal Capucha
- Department of Oral and Maxillofacial Surgery, Rambam Health Care Campus, Haifa 3109601, Israel; (D.S.); (T.C.); (K.T.); (A.R.)
| | - Karim Tarabieh
- Department of Oral and Maxillofacial Surgery, Rambam Health Care Campus, Haifa 3109601, Israel; (D.S.); (T.C.); (K.T.); (A.R.)
| | - Adi Rachmiel
- Department of Oral and Maxillofacial Surgery, Rambam Health Care Campus, Haifa 3109601, Israel; (D.S.); (T.C.); (K.T.); (A.R.)
- Bruce Rappaport Faculty of Medicine, Technion—Israel Institute of Technology, Haifa 3109601, Israel
| | - Ester Segal
- Department of Biotechnology and Food Engineering, Technion—Israel Institute of Technology, Haifa 3200003, Israel; (M.R.); (L.G.)
- Russell Berrie Nanotechnology Institute, Technion—Israel Institute of Technology, Haifa 3200003, Israel
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Chen XY, Butt AM, Mohd Amin MCI. Molecular Evaluation of Oral Immunogenicity of Hepatitis B Antigen Delivered by Hydrogel Microparticles. Mol Pharm 2019; 16:3853-3872. [PMID: 31398038 DOI: 10.1021/acs.molpharmaceut.9b00483] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The development of oral vaccine formulation is crucial to facilitate an effective mass immunization program for various vaccine-preventable diseases. In this work, the efficacy of hepatitis B antigen delivered by bacterial nanocellulose/poly(acrylic acid) composite hydrogel microparticles (MPs) as oral vaccine carriers was assessed to induce both local and systemic immunity. Optimal pH-responsive swelling, mucoadhesiveness, protein drug loading, and drug permeability were characterized by MPs formulated with minimal irradiation doses and acrylic acid concentration. The composite hydrogel materials of bacterial nanocellulose and poly(acrylic acid) showed significantly greater antigen release in simulated intestinal fluid while ensuring the integrity of antigen. In in vivo study, mice orally vaccinated with antigen-loaded hydrogel MPs showed enhanced vaccine immunogenicity with significantly higher secretion of mucosal immunoglobulin A, compared to intramuscular vaccinated control. The splenocytes from the same group demonstrated lymphoproliferation and significant increased secretion of interleukin-2 cytokines upon stimulation with hepatitis B antigen. Expression of CD69 in CD4+ T lymphocytes and CD19+ B lymphocytes in splenocytes from mice orally vaccinated with antigen-loaded hydrogel MPs was comparable to that of the intramuscular vaccinated control, indicating early activation of lymphocytes elicited by our oral vaccine formulation in just two doses. These results demonstrated the potential of antigen-loaded hydrogel MPs as an oral vaccination method for hepatitis B.
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Affiliation(s)
- Xiang Yi Chen
- Centre for Drug Delivery Research, Faculty of Pharmacy , Universiti Kebangsaan Malaysia , Jalan Raja Muda Abdul Aziz , 50300 Kuala Lumpur , Malaysia
| | - Adeel Masood Butt
- Department of Pharmacy , The University of Lahore , Gujrat Campus, Adjacent Chenab Bridge, Main GT Road , 50700 Gujrat , Pakistan
| | - Mohd Cairul Iqbal Mohd Amin
- Centre for Drug Delivery Research, Faculty of Pharmacy , Universiti Kebangsaan Malaysia , Jalan Raja Muda Abdul Aziz , 50300 Kuala Lumpur , Malaysia
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Andhariya JV, Jog R, Shen J, Choi S, Wang Y, Zou Y, Burgess DJ. Development of Level A in vitro-in vivo correlations for peptide loaded PLGA microspheres. J Control Release 2019; 308:1-13. [DOI: 10.1016/j.jconrel.2019.07.013] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 06/29/2019] [Accepted: 07/09/2019] [Indexed: 01/04/2023]
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Zhang H, Chen J, Li N, Jiang R, Zhu XM, Wang J. Au Nanobottles with Synthetically Tunable Overall and Opening Sizes for Chemo-Photothermal Combined Therapy. ACS APPLIED MATERIALS & INTERFACES 2019; 11:5353-5363. [PMID: 30638377 DOI: 10.1021/acsami.8b19163] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Highly asymmetric Au nanostructures, such as split Au nanorings and Au nanocups, exhibit attractive plasmonic properties because of their asymmetric geometries. To facilitate their plasmonic applications, effective and facile synthetic methods for producing asymmetric Au nanostructures with controllable sizes and uniform shapes are highly desirable. Herein, we report on an approach for the synthesis of largely asymmetric colloidal Au nanobottles with synthetically tunable overall and opening sizes. Au nanobottles with overall sizes in the range of ∼100-230 nm are obtained through sacrificial templating with differently sized PbS nano-octahedra. The opening sizes of the produced Au nanobottles can be tailored from ∼10 to ∼120 nm by either adjusting the Au/PbS molar ratio in the growth process or controlling the oxidation degree. The achieved size tunability allows the plasmon resonance wavelength of Au nanobottles to be varied in the range of ∼600-900 nm. Our uniform Au nanobottles, which possess controllable sizes, large cavity volumes, and tunable plasmon resonance wavelengths in the visible to near-infrared range, have been further applied for anticancer drug delivery and photothermal therapy. The effects of surface coating and the opening size of Au nanobottles on the drug encapsulation efficiency (EE) and initial burst drug release are systemically evaluated. A high doxorubicin EE and low initial burst drug release are realized with the dense silica-coated Au nanobottles having an opening size of 44 nm. In addition, chemo-photothermal combined therapy has been demonstrated with the doxorubicin-loaded Au nanobottles. Our results will be helpful for the design of Au nanobottles with different sizes and plasmonic properties as well as provide ample opportunities for exploring various plasmon-enabled applications of Au nanobottles.
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Affiliation(s)
- Han Zhang
- Department of Physics , The Chinese University of Hong Kong , Shatin , Hong Kong SAR , China
| | - Jianli Chen
- State Key Laboratory of Quality Research in Chinese Medicine , Macau University of Science and Technology , Avenida Wai Long , Taipa , Macau SAR , China
| | - Nannan Li
- Department of Physics , The Chinese University of Hong Kong , Shatin , Hong Kong SAR , China
| | - Ruibin Jiang
- Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering , Shaanxi Normal University , Xi'an 710119 , China
| | - Xiao-Ming Zhu
- State Key Laboratory of Quality Research in Chinese Medicine , Macau University of Science and Technology , Avenida Wai Long , Taipa , Macau SAR , China
| | - Jianfang Wang
- Department of Physics , The Chinese University of Hong Kong , Shatin , Hong Kong SAR , China
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Mesoporous Silicon Particles Favor the Induction of Long-Lived Humoral Responses in Mice to a Peptide-Based Vaccine. MATERIALS 2018; 11:ma11071083. [PMID: 29949862 PMCID: PMC6073586 DOI: 10.3390/ma11071083] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/26/2018] [Revised: 06/12/2018] [Accepted: 06/13/2018] [Indexed: 01/28/2023]
Abstract
Vaccinology faces the challenge of developing improved immunization approaches that are able to induce long-term immunity with the desired Th profile according to the pathology. In this context, new vehicles for efficient antigen delivery that exert adjuvant effects play a critical role in addressing this goal. Herein, mesoporous silicon particles (PSiP) were assessed as carriers for a peptide-based vaccine targeting the receptor for advanced glycation end products (RAGE), which is a relevant receptor in Alzheimer´s disease and other diseases. A RAGE peptide was adsorbed onto PSiP (PSiP vaccine) and administered to BALB/c mice, leading to immune responses that were similar in magnitude to those induced by the soluble peptide. However, the response induced by PSiP lasted for a significantly longer period when compared with the behavior of the group immunized with the peptide alone. Therefore, PSiP are proposed as carriers to enhance immune memory, which is critical in vaccination. This study opens interesting perspectives related to the application of PSiP in vaccinology.
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Efimov AE, Agapova OI, Safonova LA, Bobrova MM, Volkov AD, Khamkhash L, Agapov II. Cryo scanning probe nanotomography study of the structure of alginate microcarriers. RSC Adv 2017. [DOI: 10.1039/c6ra26516b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Nanostructure of microparticles of decellularized rat liver ECM on spherical alginate hydrogel microcarriers is analyzed by cryo scanning probe nanotomography.
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Affiliation(s)
- Anton E. Efimov
- Laboratory of Bionanotechnology
- V.I.Shumakov Federal Research Center of Transplantology and Artificial Organs
- Moscow
- 123182 Russia
- SNOTRA LLC
| | - Olga I. Agapova
- Laboratory of Bionanotechnology
- V.I.Shumakov Federal Research Center of Transplantology and Artificial Organs
- Moscow
- 123182 Russia
| | - Liubov A. Safonova
- Laboratory of Bionanotechnology
- V.I.Shumakov Federal Research Center of Transplantology and Artificial Organs
- Moscow
- 123182 Russia
- Bioengineering Department
| | - Maria M. Bobrova
- Laboratory of Bionanotechnology
- V.I.Shumakov Federal Research Center of Transplantology and Artificial Organs
- Moscow
- 123182 Russia
- Bioengineering Department
| | - Alexey D. Volkov
- National Laboratory Astana
- Nazarbayev University
- 010000 Astana
- Kazakhstan
| | - Laura Khamkhash
- National Laboratory Astana
- Nazarbayev University
- 010000 Astana
- Kazakhstan
| | - Igor I. Agapov
- Laboratory of Bionanotechnology
- V.I.Shumakov Federal Research Center of Transplantology and Artificial Organs
- Moscow
- 123182 Russia
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12
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Uskoković V, Ghosh S. Carriers for the tunable release of therapeutics: etymological classification and examples. Expert Opin Drug Deliv 2016; 13:1729-1741. [PMID: 27322661 DOI: 10.1080/17425247.2016.1200558] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Introduction Physiological processes at the molecular level take place at precise spatiotemporal scales, which vary from tissue to tissue and from one patient to another, implying the need for carriers that enable tunable release of therapeutics. Areas covered Classification of all drug release to intrinsic and extrinsic is proposed, followed by the etymological clarification of the term 'tunable' and its distinction from the term 'tailorable'. Tunability is defined as analogous to tuning a guitar string or a radio receiver to the right frequency using a single knob. It implies changing a structural parameter along a continuous quantitative scale and correlating it numerically with the release kinetics. Examples of tunable, tailorable and environmentally responsive carriers are given, along with the parameters used to achieve these levels of control. Expert opinion Interdependence of multiple variables defining the carrier microstructure obstructs the attempts to elucidate parameters that allow for the independent tuning of release kinetics. Learning from the tunability of nanostructured materials and superstructured metamaterials can be a fruitful source of inspiration in the quest for the new generation of tunable release carriers. The greater intersection of traditional materials sciences and pharmacokinetic perspectives could foster the development of more sophisticated mechanisms for tunable release.
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Affiliation(s)
- Vuk Uskoković
- a Department of Bioengineering , University of Illinois , Chicago , IL , USA.,b Department of Biomedical and Pharmaceutical Sciences , Chapman University , Irvine , CA , USA
| | - Shreya Ghosh
- a Department of Bioengineering , University of Illinois , Chicago , IL , USA
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13
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Ghosh S, Wu V, Pernal S, Uskoković V. Self-Setting Calcium Phosphate Cements with Tunable Antibiotic Release Rates for Advanced Antimicrobial Applications. ACS APPLIED MATERIALS & INTERFACES 2016; 8:7691-708. [PMID: 26958867 PMCID: PMC5002010 DOI: 10.1021/acsami.6b01160] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Osteomyelitis, an infectious disease predominantly tied to poor sanitary conditions in underdeveloped regions of the world, is in need of inexpensive, easily in situ synthesizable and administrable materials for its treatment. The results of this study stem from the attempt to create one such affordable and minimally invasive therapeutic platform in the form of a self-setting, injectable cement with a tunable drug release profile, composed of only nanoparticulate hydroxyapatite, the synthetic version of the bone mineral. Cements comprised two separately synthesized hydroxyapatite powders, one of which, HAP2, was precipitated abruptly, retaining the amorphous nature longer, and the other one of which, HAP1, was precipitated at a slower rate, more rapidly transitioning to the crystalline structure. Cements were made with four different weight ratios of the two hydroxyapatite components: 100/0, 85/15, 50/50, and 0/100 with respect to HAP1 and HAP2. Both the setting and the release rates measured on two different antibiotics, vancomycin and ciprofloxacin, were controlled using the weight ratio of the two hydroxyapatite components. Various inorganic powder properties were formerly used to control drug release, but here we demonstrate for the first time that the kinetics of the mechanism of formation of a solid compound can be controlled to produce tunable drug release profiles. Specifically, it was found that the longer the precursor calcium phosphate component of the cement retains the amorphous nature of the primary precipitate, the more active it was in terms of speeding up the diffusional release of the adsorbed drug. The setting rate was, in contrast, inversely proportional to the release rate and to the content of this active hydroxyapatite component, HAP2. The empirical release profiles were fitted to a set of equations that could be used to tune the release rate to the therapeutic occasion. All of the cements loaded with vancomycin or ciprofloxacin inhibited the growth of Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli and Pseudomonas aeruginosa in both agar diffusion assays and broth dilution tests with intensities either comparable to the antibiotic per se, as in the case of ciprofloxacin, or even larger than the antibiotic alone, as in the case of vancomycin. Interestingly, even the pure cements exhibited an antibacterial effect ranging from moderate to strong, while demonstrating high levels of biocompatibility with osteoclastic RAW264.7 cells and only slightly affecting the viability of the osteoblastic MC3T3-E1 cells, in direct proportion with the amount of the more active hydroxyapatite component in the cements. This antibacterial effect was especially noticeable against Gram-negative bacteria, where the growth inhibition by the cements was comparable to or even stronger than that of the pure antibiotics. The antibiofilm assay against P. aeruginosa biofilms reiterated the antibiotic effectiveness of pure, antibiotic-free cements. That the carrier per se, composed of a nontoxic, easily prepared, bone mineral composite, can exhibit a strong antibacterial effect even in the absence of an antibiotic drug is an insight highly relevant in view of the rising resistance of an array of pathogens to traditional antibiotic therapies and the demands for the timely development of suitable alternatives.
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Affiliation(s)
- Shreya Ghosh
- Advanced Materials and Nanobiotechnology Laboratory, Department of Bioengineering, University of Illinois, Chicago, Illinois 60607, United States
| | - Victoria Wu
- Advanced Materials and Nanobiotechnology Laboratory, Department of Bioengineering, University of Illinois, Chicago, Illinois 60607, United States
| | - Sebastian Pernal
- Advanced Materials and Nanobiotechnology Laboratory, Department of Bioengineering, University of Illinois, Chicago, Illinois 60607, United States
| | - Vuk Uskoković
- Advanced Materials and Nanobiotechnology Laboratory, Department of Bioengineering, University of Illinois, Chicago, Illinois 60607, United States
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