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Liu Y, Long M, Wang Y, Liang Z, Dong Y, Qu M, Ge X, Nan Y, Chen Y, Zhou X. Chitosan-alginate/R8 ternary polyelectrolyte complex as an oral protein-based vaccine candidate induce effective mucosal immune responses. Int J Biol Macromol 2024; 275:133671. [PMID: 38971274 DOI: 10.1016/j.ijbiomac.2024.133671] [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: 01/09/2024] [Revised: 07/01/2024] [Accepted: 07/02/2024] [Indexed: 07/08/2024]
Abstract
Vaccination is the most effective method for preventing infectious diseases. Oral vaccinations have attracted much attention due to the ability to boost intestinal and systemic immunity. The focus of this study was to develop a poly (lactide-co-glycolide) acid (PLGA)-based ternary polyelectrolyte complex (PEC) with chitosan, sodium alginate, and transmembrane peptides R8 for the delivery of antigen proteins. In this study, the antigen protein (HBf), consisting of the Mycobacterium avium subspecies paratuberculosis (MAP) antigens HBHA, Ag85B, and Bfra, was combined with R8 to generate self-assembled conjugates. The results showed that PEC presented a cross-linked reticular structure to protect the encapsulated proteins in the simulated gastric fluid. Then, the nanocomposite separated into individual nanoparticles after entering the simulated intestinal fluid. The ternary PEC with R8 promoted the in vivo uptake of antigens by intestinal lymphoid tissue. Moreover, the ternary PEC administered orally to mice promoted the secretion of specific antibodies and intestinal mucosal IgA. In addition, in the mouse models of MAP infection, the ternary PEC enhanced splenic T cell responses, thus reducing bacterial load and liver pathology score. These results suggested that this ternary electrolyte complex could be a promising delivery platform for oral subunit vaccine candidates, not limited to MAP infection.
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Affiliation(s)
- Yiduo Liu
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, PR China
| | - Meizhen Long
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, PR China
| | - Yuanzhi Wang
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, PR China
| | - Zhengmin Liang
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, PR China
| | - Yuhui Dong
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, PR China
| | - Mengjin Qu
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, PR China
| | - Xin Ge
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, PR China
| | - Yue Nan
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, PR China
| | - Yulan Chen
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, PR China
| | - Xiangmei Zhou
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, PR China.
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Gavali P, Desai J, Shah P, Sawarkar S. Transmucosal Delivery of Peptides and Proteins Through Nanofibers: Current Status and Emerging Developments. AAPS PharmSciTech 2024; 25:74. [PMID: 38575778 DOI: 10.1208/s12249-024-02794-x] [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: 12/17/2023] [Accepted: 03/16/2024] [Indexed: 04/06/2024] Open
Abstract
Advancements in recombinant DNA technology have made proteins and peptides available for diagnostic and therapeutic applications, but their effectiveness when taken orally leads to poor patient compliance, requiring clinical administration. Among the alternative routes, transmucosal delivery has the advantage of being noninvasive and bypassing hepato-gastrointestinal clearance. Various mucosal routes-buccal, nasal, pulmonary, rectal, and vaginal-have been explored for delivering these macromolecules. Nanofibers, due to their unique properties like high surface-area-to-volume ratio, mechanical strength, and improved encapsulation efficiency, serve as promising carriers for proteins and peptides. These nanofibers can be tailored for quick dissolution, controlled release, enhanced encapsulation, targeted delivery, and improved bioavailability, offering superior pharmaceutical and pharmacokinetic performance compared to conventional methods. This leads to reduced dosages, fewer side effects, and enhanced patient compliance. Hence, nanofibers hold tremendous potential for protein/peptide delivery, especially through mucosal routes. This review focuses on the therapeutic application of proteins and peptides, challenges faced in their conventional delivery, techniques for fabricating different types of nanofibers and, various nanofiber-based dosage forms, and factors influencing nanofiber generation. Insights pertaining to the precise selection of materials used for fabricating nanofibers and regulatory aspects have been covered. Case studies wherein the use of specific protein/peptide-loaded nanofibers and delivered via oral/vaginal/nasal mucosa for diagnostic/therapeutic use and related preclinical and clinical studies conducted have been included in this review.
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Affiliation(s)
- Priyanka Gavali
- Department of Pharmaceutics, SVKM's Dr. Bhanuben Nanavati College of Pharmacy, University of Mumbai, Mumbai, 1st Floor Gate No. 1, Mithibai College Campus, VM Road, Vile Parle West, 400056, Maharashtra, India
| | - Jagruti Desai
- Department of Pharmaceutics and Pharmaceutical Technology, Ramanbhai Patel College of Pharmacy, Charotar University of Science and Technology (CHARUSAT), CHARUSAT Campus, Changa, 388421, India
| | - Pranav Shah
- Maliba Pharmacy College, Uka Tarsadia University, Maliba Campus, Gopal Vidyanagar, Bardoli-Mahuva Road, Tarsadi, Surat, 394350, Gujrat, India
| | - Sujata Sawarkar
- Department of Pharmaceutics, SVKM's Dr. Bhanuben Nanavati College of Pharmacy, University of Mumbai, Mumbai, 1st Floor Gate No. 1, Mithibai College Campus, VM Road, Vile Parle West, 400056, Maharashtra, India.
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Pinto SFT, Santos HA, Sarmento BFCC. New insights into nanomedicines for oral delivery of glucagon-like peptide-1 analogs. WILEY INTERDISCIPLINARY REVIEWS. NANOMEDICINE AND NANOBIOTECHNOLOGY 2024; 16:e1952. [PMID: 38500351 DOI: 10.1002/wnan.1952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Revised: 01/23/2024] [Accepted: 02/21/2024] [Indexed: 03/20/2024]
Abstract
Type 2 diabetes mellitus (T2DM) is a metabolic disorder that arises when the body cannot respond fully to insulin, leading to impaired glucose tolerance. Currently, the treatment embraces non-pharmacological actions (e.g., diet and exercise) co-associated with the administration of antidiabetic drugs. Metformin is the first-line treatment for T2DM; nevertheless, alternative therapeutic strategies involving glucagon-like peptide-1 (GLP-1) analogs have been explored for managing the disease. GLP-1 analogs trigger insulin secretion and suppress glucagon release in a glucose-dependent manner thereby, reducing the risk of hyperglycemia. Additionally, GLP-1 analogs have an extended plasma half-life compared to the endogenous peptide due to their high resistance to degradation by dipeptidyl peptidase-4. However, GLP-1 analogs are mainly administered via subcutaneous route, which can be inconvenient for the patients. Even considering an oral delivery approach, GLP-1 analogs are exposed to the harsh conditions of the gastrointestinal tract (GIT) and the intestinal barriers (mucus and epithelium). Hereupon, there is an unmet need to develop non-invasive oral transmucosal drug delivery strategies, such as the incorporation of GLP-1 analogs into nanoplatforms, to overcome the GIT barriers. Nanotechnology has the potential to shield antidiabetic peptides against the acidic pH and enzymatic activity of the stomach. In addition, the nanoparticles can be coated and/or surface-conjugated with mucodiffusive polymers and target intestinal ligands to improve their transport through the intestinal mucus and epithelium. This review focuses on the main hurdles associated with the oral administration of GLP-1 and GLP-1 analogs, and the nanosystems developed to improve the oral bioavailability of the antidiabetic peptides. This article is categorized under: Therapeutic Approaches and Drug Discovery > Nanomedicine for Infectious Disease Nanotechnology Approaches to Biology > Nanoscale Systems in Biology.
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Affiliation(s)
- Soraia Filipa Tavares Pinto
- Instituto de Investigação e Inovação em Saúde (i3S), University of Porto, Porto, Portugal
- Instituto de Ciências Biomédicas Abel Salazar (ICBAS), University of Porto, Porto, Portugal
| | - Hélder Almeida Santos
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland
- W.J. Kolff Institute for Biomedical Engineering and Materials Science, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
- Department of Biomedical Engineering, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Bruno Filipe Carmelino Cardoso Sarmento
- Instituto de Investigação e Inovação em Saúde (i3S), University of Porto, Porto, Portugal
- Instituto Universitário de Ciências da Saúde (IUCS-CESPU), Gandra, Portugal
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Balafouti A, Forys A, Trzebicka B, Gerardos AM, Pispas S. Anionic Hyperbranched Amphiphilic Polyelectrolytes as Nanocarriers for Antimicrobial Proteins and Peptides. MATERIALS (BASEL, SWITZERLAND) 2023; 16:7702. [PMID: 38138846 PMCID: PMC10745097 DOI: 10.3390/ma16247702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 12/13/2023] [Accepted: 12/14/2023] [Indexed: 12/24/2023]
Abstract
This manuscript presents the synthesis of hyperbranched amphiphilic poly (lauryl methacrylate-co-tert-butyl methacrylate-co-methacrylic acid), H-P(LMA-co-tBMA-co-MAA) copolymers via reversible addition fragmentation chain transfer (RAFT) copolymerization of tBMA and LMA, and their post-polymerization modification to anionic amphiphilic polyelectrolytes. The focus is on investigating whether the combination of the hydrophobic characters of LMA and tBMA segments, as well as the polyelectrolyte and hydrophilic properties of MAA segments, both distributed within a unique hyperbranched polymer chain topology, would result in intriguing, branched copolymers with the potential to be applied in nanomedicine. Therefore, we studied the self-assembly behavior of these copolymers in aqueous media, as well as their ability to form complexes with cationic proteins, namely lysozyme (LYZ) and polymyxin (PMX). Various physicochemical characterization techniques, including size exclusion chromatography (SEC) and proton nuclear magnetic resonance (1H-NMR), verified the molecular characteristics of these well-defined copolymers, whereas light scattering and fluorescence spectroscopy techniques revealed promising nanoparticle (NP) self- and co-assembly properties of the copolymers in aqueous media.
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Affiliation(s)
- Anastasia Balafouti
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Ave., 11635 Athens, Greece; (A.B.); (A.M.G.)
- Department of Chemistry, National and Kapodistrian University of Athens (NKUA), 15784 Athens, Greece
| | - Aleksander Forys
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, 34 ul. M. Curie-Skłodowskiej, 41-819 Zabrze, Poland; (A.F.); (B.T.)
| | - Barbara Trzebicka
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, 34 ul. M. Curie-Skłodowskiej, 41-819 Zabrze, Poland; (A.F.); (B.T.)
| | - Angelica Maria Gerardos
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Ave., 11635 Athens, Greece; (A.B.); (A.M.G.)
- Department of Chemistry, National and Kapodistrian University of Athens (NKUA), 15784 Athens, Greece
| | - Stergios Pispas
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Ave., 11635 Athens, Greece; (A.B.); (A.M.G.)
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Shen H, Zhang N, Kong X, Wang N, Hu HG, Cong W, Liu C. Benzyl stapled modification and anticancer activity of antimicrobial peptide A4K14-Citropin 1.1. Bioorg Med Chem Lett 2023; 96:129499. [PMID: 37804993 DOI: 10.1016/j.bmcl.2023.129499] [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: 08/19/2023] [Revised: 09/25/2023] [Accepted: 10/04/2023] [Indexed: 10/09/2023]
Abstract
A4K14-Citropin 1.1 (GLFAVIKKVASVIKGL-NH2) is a derived antimicrobial peptide (AMP) with a more stable α-helical structure at the C-terminal compared to prototype Citropin 1.1 which was obtained from glandular skin secretions of Australian freetail lizards. In a previous report, A4K14-Citropin 1.1 has been considered as an anti-cancer lead compound. However, linear peptides are difficult to maintain stable secondary structure, resulted in poor pharmacokinetic properties. In this study, we designed and synthesized a series of benzyl-stapled derivatives of A4K14-Citropin 1.1. And their physical and chemical properties, as well as biological activity, were both explored. The result showed that AC-CCSP-2-o and AC-CCSP-3-o exhibited a higher degree of helicity and greater anti-cancer activity compared with the prototype peptide. Besides, there was no significant difference in the hemolytic effect between the stapled peptides and the prototype peptide. AC-CCSP-2-o and AC-CCSP-3-o could serve as promising anti-cancer lead compounds for the novel anti-cancer drug development.
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Affiliation(s)
- Huaxing Shen
- School of Medicine, Shanghai University, Shanghai 200444, China
| | - Nan Zhang
- School of Medicine, Shanghai University, Shanghai 200444, China
| | - Xianglong Kong
- School of Pharmacy, Weifang Medical University, Weifang 261053, PR. China
| | - Nan Wang
- School of Medicine, Shanghai University, Shanghai 200444, China
| | - Hong-Gang Hu
- School of Medicine, Shanghai University, Shanghai 200444, China
| | - Wei Cong
- School of Medicine, Shanghai University, Shanghai 200444, China.
| | - Chao Liu
- School of Medicine, Shanghai University, Shanghai 200444, China.
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Ma Y, Zhu G, Feng L, Jiang S, Xiang Q, Wang J. Efficient Cytotoxicity of Recombinant Azurin in Escherichia coli Nissle 1917-Derived Minicells against Colon Cancer Cells. Bioengineering (Basel) 2023; 10:1188. [PMID: 37892918 PMCID: PMC10603951 DOI: 10.3390/bioengineering10101188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 08/15/2023] [Accepted: 08/16/2023] [Indexed: 10/29/2023] Open
Abstract
Compared to chemical drugs, therapeutic proteins exhibit higher specificity and activity and are generally well-tolerated by the human body. However, the limitations, such as poor stability both in vivo and in vitro as well as difficulties in penetrating cell membranes, hinder their widespread application. To overcome the challenges, a highly efficient protocol was developed and implemented for the recombinant expression of the therapeutic protein azurin and secretion into minicells derived from probiotic Escherichia coli Nissle 1917. The novel coupled production with a delivery system of therapeutic proteins based on minicells was obtained through purification to enhance protein activity, circulation characteristics, and targeting specificity. This protein drug carrier integrates the production of carrier materials and the loading of expression proteins. The drug carrier also protects the encapsulated polypeptide drugs from enzymatic or gastric acid degradation until they are released. Escherichia coli Nissle 1917-derived minicells have natural targeting to colon cancer cells, low toxicity, and can accumulate for a long time after penetrating tumor tissue. This self-produced protein drug delivery system simplified the process of protein preparation, and its inhibitory effect on different types of colon cancer cells was verified by CCK-8 cytotoxicity assay, cancer cell invasion, and migration assay. This work provided a simple method to prepare minicell drug delivery systems for protein drug production and a novel approach for the transport of recombinant protein drugs.
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Affiliation(s)
- Yi Ma
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China
- Guangdong Provincial Key Laboratory of Fermentation and Enzyme Engineering, South China University of Technology, Guangzhou 510006, China
| | - Guanshu Zhu
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China
| | - Lan Feng
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China
| | - Shoujin Jiang
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China
| | - Qi Xiang
- Institute of Biomedicine and Guangdong Provincial Key Laboratory of Bioengineering Medicine, Jinan University, Guangzhou 510632, China
| | - Jufang Wang
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China
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Peng H, Wang J, Chen J, Peng Y, Wang X, Chen Y, Kaplan DL, Wang Q. Challenges and opportunities in delivering oral peptides and proteins. Expert Opin Drug Deliv 2023; 20:1349-1369. [PMID: 37450427 PMCID: PMC10990675 DOI: 10.1080/17425247.2023.2237408] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 07/07/2023] [Accepted: 07/13/2023] [Indexed: 07/18/2023]
Abstract
INTRODUCTION Rapid advances in bioengineering enable the use of complex proteins as therapeutic agents to treat diseases. Compared with conventional small molecule drugs, proteins have multiple advantages, including high bioactivity and specificity with low toxicity. Developing oral dosage forms with active proteins is a route to improve patient compliance and significantly reduce production costs. However, the gastrointestinal environment remains a challenge to this delivery path due to enzymatic degradation, low permeability, and weak absorption, leading to reduced delivery efficiency and poor clinical outcomes. AREAS COVERED This review describes the barriers to oral delivery of peptides and complex proteins, current oral delivery strategies utilized and the opportunities and challenges ahead to try and circumvent these barriers. Oral protein drugs on the market and clinical trials provide insights and approaches for advancing delivery strategies. EXPERT OPINION Although most current studies on oral protein delivery rely on in vitro and in vivo animal data, the safety and limitations of the approach in humans remain uncertain. The shortage of clinical data limits the development of new or alternative strategies. Therefore, designing appropriate oral delivery strategies remains a significant challenge and requires new ideas, innovative design strategies and novel model systems.
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Affiliation(s)
- Haisheng Peng
- Department of Pharmacology, Medical College, University of Shaoxing, Shaoxing, China
- Department of Chemical and Biological Engineering, Iowa State University, Ames, IA 50011, USA
| | - Jiahe Wang
- Department of Humanities, Daqing Branch, Harbin Medical University, Daqing, China
| | - Jiayu Chen
- Department of Pharmacology, Medical College, University of Shaoxing, Shaoxing, China
| | - Yanbo Peng
- Department of Pharmaceutical Engineering, China Pharmaceutical University, 639 Longmian Rd, Nanjing 211198, China
| | - Xiaoxian Wang
- The Affiliated Hospital of Medical College, University of Shaoxing, Shaoxing, Zhejiang Province, China
| | - Ying Chen
- Department of Biomedical Engineering, Tufts University, Medford, MA, 02155, USA
| | - David L. Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, MA, 02155, USA
| | - Qun Wang
- Department of Chemical and Biological Engineering, Iowa State University, Ames, IA 50011, USA
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Nassar N, Kasapis S. Fundamental advances in hydrogels for the development of the next generation of smart delivery systems as biopharmaceuticals. Int J Pharm 2023; 633:122634. [PMID: 36690133 DOI: 10.1016/j.ijpharm.2023.122634] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Revised: 01/16/2023] [Accepted: 01/17/2023] [Indexed: 01/22/2023]
Abstract
Recent advances in developing and applying therapeutic peptides for anticancer, antimicrobial and immunomodulatory remedies have opened a new era in therapeutics. This development has resulted in the engineering of new biologics as part of a concerted effort by the pharmaceutical industry. Many alternative routes of administration and delivery vehicles, targeting better patient compliance and optimal therapeutic bioavailability, have emerged. However, the design of drug delivery systems to protect a range of unstable macromolecules, including peptides and proteins, from high temperatures, acidic environments, and enzymatic degradation remains a priority. Herein, we give chronological insights in the development of controlled-release drug delivery systems that occurred in the last 70 years or so. Subsequently, we summarise the key physicochemical characteristics of hydrogels contributing to the development of protective delivery systems concerning drug-targeted delivery in the chronospatial domain for biopharmaceuticals. Furthermore, we shed some light on promising hydrogels that can be utilised for systemic bioactive administration.
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Affiliation(s)
- Nazim Nassar
- School of Science, RMIT University, Bundoora West Campus, Melbourne, Vic 3083, Australia.
| | - Stefan Kasapis
- School of Science, RMIT University, Bundoora West Campus, Melbourne, Vic 3083, Australia
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Calderón-Colón X, Zhang Y, Tiburzi O, Wang J, Hou S, Raimondi G, Patrone J. Design and characterization of lipid nanocarriers for oral delivery of immunotherapeutic peptides. J Biomed Mater Res A 2022; 111:938-949. [PMID: 36585800 DOI: 10.1002/jbm.a.37477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 10/07/2022] [Accepted: 11/30/2022] [Indexed: 01/01/2023]
Abstract
The use of therapeutic proteins and peptides is of great interest for the treatment of many diseases, and advances in nanotechnology offer a path toward their stable delivery via preferred routes of administration. In this study, we sought to design and formulate a nanostructured lipid carrier (NLC) containing a nominal antigen (insulin peptide) for oral delivery. We utilized the design of experiments (DOE) statistical method to determine the dependencies of formulation variables on physicochemical particle characteristics including particle size, polydispersity (PDI), melting point, and latent heat of melting. The particles were determined to be non-toxic in vitro, readily taken up by primary immune cells, and found to accumulate in regional lymph nodes following oral administration. We believe that this platform technology could be broadly useful for the treatment of autoimmune diseases by supporting the development of oral delivery-based antigen specific immunotherapies.
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Affiliation(s)
| | - Yichuan Zhang
- Department of Plastic & Reconstructive Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Olivia Tiburzi
- Johns Hopkins Applied Physics Laboratory, Laurel, Maryland, USA
| | - Jialu Wang
- Department of Plastic & Reconstructive Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Shenda Hou
- Department of Plastic & Reconstructive Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Giorgio Raimondi
- Department of Plastic & Reconstructive Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Julia Patrone
- Johns Hopkins Applied Physics Laboratory, Laurel, Maryland, USA
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10
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Physical, Chemical, and Biological Properties of Chitosan-Coated Alginate Microparticles Loaded with Porcine Interleukin-1β: A Potential Protein Adjuvant Delivery System. Int J Mol Sci 2022; 23:ijms23179959. [PMID: 36077367 PMCID: PMC9456129 DOI: 10.3390/ijms23179959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 08/27/2022] [Accepted: 08/30/2022] [Indexed: 11/27/2022] Open
Abstract
We previously developed chicken interleukin-1β (IL-1β) mutants as single-dose adjuvants that induce protective immunity when co-administered with an avian vaccine. However, livestock such as pigs may require a vaccine adjuvant delivery system that provides long-lasting protection to reduce the need for successive booster doses. Therefore, we developed chitosan-coated alginate microparticles as a carrier for bovine serum albumin (BSA) or porcine IL-1β (pIL-1β) and assessed their physical, chemical, and biological properties. Electrospraying of the BSA-loaded alginate microparticles (BSA/ALG MPs) resulted in an encapsulation efficiency of 50%, and those MPs were then coated with chitosan (BSA/ALG/CHI MPs). Optical and scanning electron microscopy, zeta potential analysis, and Fourier transform infrared spectroscopy were used to characterize these MPs. The BSA encapsulation parameters were applied to ALG/CHI MPs loaded with pIL-1β, which were not cytotoxic to porcine fibroblasts but had enhanced bio-activity over unencapsulated pIL-1β. The chitosan layer of the BSA/ALG/CHI MPs prevented burst release and facilitated sustained release of pIL-1β for at least 28 days. In conclusion, BSA/ALG/CHI MPs prepared as a carrier for pIL-1β may be used as an adjuvant for the formulation of pig vaccines.
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Yashchenok AM, Gusliakova OI, Konovalova EV, Novoselova MV, Shipunova VO, Abakumova TO, Efimova OI, Kholodenko R, Schulga AA, Zatsepin TS, Gorin DA, Deyev SM. Barnase encapsulation into submicron porous CaCO 3 particles: studies of loading and enzyme activity. J Mater Chem B 2021; 9:8823-8831. [PMID: 34633027 DOI: 10.1039/d1tb01315g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The present study focuses on the immobilization of the bacterial ribonuclease barnase (Bn) into submicron porous calcium carbonate (CaCO3) particles. For encapsulation, we apply adsorption, freezing-induced loading and co-precipitation methods and study the effects of adsorption time, enzyme concentration and anionic polyelectrolytes on the encapsulation efficiency of Bn. We show that the use of negatively charged dextran sulfate (DS) and ribonucleic acid from yeast (RNA) increases the loading capacity (LC) of the enzyme on CaCO3 particles by about 3-fold as compared to the particles with Bn itself. The ribonuclease (RNase) activity of encapsulated enzyme depends on the LC of the particles and transformation of metastable vaterite to stable calcite, as studied by the assessment of enzyme activities in particles.
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Affiliation(s)
- Alexey M Yashchenok
- Center for Photonics and Quantum Materials, Skolkovo Institute of Science and Technology, 121205 Moscow, Russia.
| | - Olga I Gusliakova
- Remote Controlled Theranostic Systems Lab, Saratov State University, 410012 Saratov, Russia
| | - Elena V Konovalova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya Street 16/10, 117997 Moscow, Russia
| | - Marina V Novoselova
- Center for Photonics and Quantum Materials, Skolkovo Institute of Science and Technology, 121205 Moscow, Russia.
| | - Victoria O Shipunova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya Street 16/10, 117997 Moscow, Russia
| | - Tatiana O Abakumova
- Center for Life Science, Skolkovo Institute of Science and Technology, 121205 Moscow, Russia
| | - Olga I Efimova
- Center for Neurobiology and Brain Restoration, Skolkovo Institute of Science and Technology, 121205 Moscow, Russia
| | - Roman Kholodenko
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya Street 16/10, 117997 Moscow, Russia
| | - Alexey A Schulga
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya Street 16/10, 117997 Moscow, Russia
| | - Timofei S Zatsepin
- Center for Life Science, Skolkovo Institute of Science and Technology, 121205 Moscow, Russia
| | - Dmitry A Gorin
- Center for Photonics and Quantum Materials, Skolkovo Institute of Science and Technology, 121205 Moscow, Russia.
| | - Sergey M Deyev
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya Street 16/10, 117997 Moscow, Russia
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12
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Zhang YW, Tu LL, Tang Z, Wang Q, Zheng GL, Yin LN. pH-sensitive chitosan-deoxycholic acid/alginate nanoparticles for oral insulin delivery. Pharm Dev Technol 2021; 26:943-952. [PMID: 34372745 DOI: 10.1080/10837450.2021.1966036] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Oral absorption of peptides/proteins is usually compromised by various gastrointestinal tract barriers. To improve delivery efficiency, chitosan-conjugated deoxycholic acid (CS-DCA) coupled with sodium alginate (ALG) was prepared to load insulin into pH-sensitive nanoparticles. The insulin-loaded chitosan-deoxycholic acid/alginate nanoparticles (CDA NPs) were characterized by size (143.3 ± 10.8 nm), zeta potential (19.5 ± 1.6 mV), entrapment efficiency (61.14 ± 1.67%), and insulin drug loading (3.36 ± 0.09%). The CDA NPs exhibited pH-triggered release characteristics in vitro and protected the wrapped insulin from gastric degradation. Stability of the CDA NPs in enzyme-containing simulated gastrointestinal fluids suggested that the NPs could partially protect the wrapped insulin from enzymatic degradation. Additionally, CS-DCA-modified NPs promoted the permeability of Caco-2 cells and enhanced intracellular absorption of FITC-labeled insulin by 9.4 and 1.2-folds, when compared to insulin solution and unmodified NPs, respectively. The positively charged NPs increased intestinal villi adhesion and enhanced insulin absorption in the intestines of diabetic rat models. Furthermore, the hypoglycemic test showed that CDA NPs prolonged insulin release in vivo and exerted a remarkable hypoglycemic effect on diabetic rats with an oral bioavailability of 15%. In conclusion, CDA NPs is a potential oral insulin delivery system.
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Affiliation(s)
- Ya-Wen Zhang
- Key Laboratory of Neuropsychiatric Drug Research of Zhejiang Province, Department of Pharmacy, Hangzhou Medical College, Hangzhou, China
| | - Ling-Lan Tu
- School of Biological Engineering, Hangzhou Medical College, Hangzhou, China
| | - Zhan Tang
- Key Laboratory of Neuropsychiatric Drug Research of Zhejiang Province, Department of Pharmacy, Hangzhou Medical College, Hangzhou, China
| | - Qiao Wang
- Key Laboratory of Neuropsychiatric Drug Research of Zhejiang Province, Department of Pharmacy, Hangzhou Medical College, Hangzhou, China
| | - Gao-Li Zheng
- Key Laboratory of Neuropsychiatric Drug Research of Zhejiang Province, Department of Pharmacy, Hangzhou Medical College, Hangzhou, China
| | - Li-Na Yin
- Key Laboratory of Neuropsychiatric Drug Research of Zhejiang Province, Department of Pharmacy, Hangzhou Medical College, Hangzhou, China
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Singh U, Morya V, Datta B, Ghoroi C, Bhatia D. Stimuli Responsive, Programmable DNA Nanodevices for Biomedical Applications. Front Chem 2021; 9:704234. [PMID: 34277571 PMCID: PMC8278982 DOI: 10.3389/fchem.2021.704234] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Accepted: 06/18/2021] [Indexed: 12/12/2022] Open
Abstract
Of the multiple areas of applications of DNA nanotechnology, stimuli-responsive nanodevices have emerged as an elite branch of research owing to the advantages of molecular programmability of DNA structures and stimuli-responsiveness of motifs and DNA itself. These classes of devices present multiples areas to explore for basic and applied science using dynamic DNA nanotechnology. Herein, we take the stake in the recent progress of this fast-growing sub-area of DNA nanotechnology. We discuss different stimuli, motifs, scaffolds, and mechanisms of stimuli-responsive behaviours of DNA nanodevices with appropriate examples. Similarly, we present a multitude of biological applications that have been explored using DNA nanodevices, such as biosensing, in vivo pH-mapping, drug delivery, and therapy. We conclude by discussing the challenges and opportunities as well as future prospects of this emerging research area within DNA nanotechnology.
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Affiliation(s)
- Udisha Singh
- Biological Engineering Discipline, Indian Institute of Technology Gandhinagar, Palaj, India
| | - Vinod Morya
- Biological Engineering Discipline, Indian Institute of Technology Gandhinagar, Palaj, India
| | - Bhaskar Datta
- Biological Engineering Discipline, Indian Institute of Technology Gandhinagar, Palaj, India
- Center for Biomedical Engineering, Indian Institute of Technology Gandhinagar, Palaj, India
| | - Chinmay Ghoroi
- Center for Biomedical Engineering, Indian Institute of Technology Gandhinagar, Palaj, India
- Chemical Engineering Discipline, Indian Institute of Technology Gandhinagar, Palaj, India
| | - Dhiraj Bhatia
- Biological Engineering Discipline, Indian Institute of Technology Gandhinagar, Palaj, India
- Center for Biomedical Engineering, Indian Institute of Technology Gandhinagar, Palaj, India
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14
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Tee YN, Kumar PV, Maki MAA, Elumalai M, Rahman SAKMEH, Cheah SC. Mucoadhesive Low Molecular Chitosan Complexes to Protect rHuKGF from Proteolysis: In-vitro Characterization and FHs 74 Int Cell Proliferation Studies. Curr Pharm Biotechnol 2021; 22:969-982. [PMID: 33342408 DOI: 10.2174/1389201021666201218124450] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Revised: 09/15/2020] [Accepted: 10/24/2020] [Indexed: 02/08/2023]
Abstract
BACKGROUND Recombinant Keratinocyte Growth Factor (rHuKGF) is a therapeutic protein used widely in oral mucositis after chemotherapy in various cancers, stimulating lung morphogenesis and gastrointestinal tract cell proliferation. In this research study, chitosan-rHuKGF polymeric complex was implemented to improve the stability of rHuKGF and used as rejuvenation therapy for the treatment of oral mucositis in cancer patients. OBJECTIVE Complexation of rHuKGF with mucoadhesive low molecular weight chitosan to protect rHuKGF from proteolysis and investigate the effect of chitosan-rHuKGF complex on the proliferation rate of FHs 74 Int cells. METHODS The interaction between chitosan and rHuKGF was studied by molecular docking. Malvern ZetaSizer Nano Zs and Fourier-Transform Infrared spectroscopy (FTIR) tests were carried out to characterize the chitosan-rHuKGF complex. In addition, SDS-PAGE was performed to investigate the interaction between chitosan-rHuKGF complex and pepsin. The effect of chitosan-rHuKGF complex on the proliferation rate of FHs 74 Int cells was studied by MTT assay. RESULTS Chitosan-rHuKGF complex was formed through the hydrogen bonding proven by the docking studies. A stable chitosan-rHuKGF complex was formed at pH 4.5 and was protected from proteolysis and assessed by SDS PAGE. According to the MTT assay results, chitosan-rHuKGF complex increased the cell proliferation rate of FHs 74 Int cells. CONCLUSION The developed complex improved the stability and the biological function of rHuKGF.
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Affiliation(s)
- Yi N Tee
- Department of Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, UCSI University, No. 1, Jalan Menara Gading, Taman Connaught, Cheras 56000 Kuala Lumpur, Malaysia
| | - Palanirajan V Kumar
- Department of Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, UCSI University, No. 1, Jalan Menara Gading, Taman Connaught, Cheras 56000 Kuala Lumpur, Malaysia
| | - Marwan A A Maki
- Department of Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, UCSI University, No. 1, Jalan Menara Gading, Taman Connaught, Cheras 56000 Kuala Lumpur, Malaysia
| | - Manogaran Elumalai
- Department of Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, UCSI University, No. 1, Jalan Menara Gading, Taman Connaught, Cheras 56000 Kuala Lumpur, Malaysia
| | - Shiek A K M E H Rahman
- Department of Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, UCSI University, No. 1, Jalan Menara Gading, Taman Connaught, Cheras 56000 Kuala Lumpur, Malaysia
| | - Shiau-Chuen Cheah
- Faculty of Medicine & Health Sciences, UCSI University, No. 1, Jalan Menara Gading, Taman Connaught, Cheras 56000 Kuala Lumpur, Malaysia
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15
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Lipophilic Salts and Lipid-Based Formulations: Enhancing the Oral Delivery of Octreotide. Pharm Res 2021; 38:1125-1137. [PMID: 34100217 DOI: 10.1007/s11095-021-03063-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 05/19/2021] [Indexed: 12/17/2022]
Abstract
PURPOSE Successful oral peptide delivery faces two major hurdles: low enzymatic stability in the gastro-intestinal lumen and poor intestinal membrane permeability. While lipid-based formulations (LBF) have the potential to overcome these barriers, effective formulation of peptides remains challenging. Lipophilic salt (LS) technology can increase the apparent lipophilicity of peptides, making them more suitable for LBF. METHODS As a model therapeutic peptide, octreotide (OCT) was converted to the docusate LS (OCT.DoS2), and compared to the commercial acetate salt (OCT.OAc2) in oral absorption studies and related in vitro studies, including parallel artificial membrane permeability assay (PAMPA), Caco-2, in situ intestine perfusion, and simulated digestion in vitro models. The in vivo oral absorption of OCT.DoS2 and OCT.OAc2 formulated in self-emulsifying drug delivery systems (SEDDS) was studied in rats. RESULTS LS formulation improved the solubility and loading of OCT in LBF excipients and OCT.DoS2 in combination with SEDDS showed higher OCT absorption than the acetate comparator in the in vivo studies in rats. The Caco-2 and in situ intestine perfusion models indicated no increases in permeability for OCT.DoS2. However, the in vitro digestion studies showed reduced enzymatic degradation of OCT.DoS2 when formulated in the SEDDS formulations. Further in vitro dissociation and release studies suggest that the enhanced bioavailability of OCT from SEDDS-incorporating OCT.DoS2 is likely a result of higher partitioning into and prolonged retention within lipid colloid structures. CONCLUSION The combination of LS and LBF enhanced the in vivo oral absorption of OCT primarily via the protective effect of LBF sheltering the peptide from gastrointestinal degradation.
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Tapdigov SZ. The bonding nature of the chemical interaction between trypsin and chitosan based carriers in immobilization process depend on entrapped method: A review. Int J Biol Macromol 2021; 183:1676-1696. [PMID: 34015409 DOI: 10.1016/j.ijbiomac.2021.05.059] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 04/13/2021] [Accepted: 05/09/2021] [Indexed: 12/26/2022]
Abstract
The review article is dedicated to a comprehensive study of the chemical bond formed during the immobilization of the proteolytic enzyme pancreatic trypsin in chitosan-based polymer matrixes and its derivatives. The main focus of the study is to describe the chemical bond that causes immobilization between chitosan based carriers and trypsin. Because the nature of the chemical bond between the carrier and trypsin is a key factor in determining the area of application of the conjugate. It has been found out that after the chemical nature of functional groups, their degree of ionization, the structure of the chemical cross-linking, the medium pH and ionic strength of chitosan are modified, the mechanism of trypsin immobilization is affected. As a result, the attraction enzyme to the matrix occurs due to polar covalent and hydrogen bonds, as well as electrostatic, hydrophobic, Van der Waals forces. The collected research works on the immobilization of trypsin on chitosan-based carriers have been systematized in the paper and shown schematically in subsystems according to the type of chemical interaction. It has been shown that the immobilization of trypsin on chitosan based matrixes occur more often due to the covalent and hydrogen bonds between the protein and the carrier.
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Affiliation(s)
- Shamo Zokhrab Tapdigov
- Department of Nanostructured Metal-polymer Catalysist, Institute Catalysis and Inorganic Chemistry, Azerbaijan National Academy of Sciences, H. Javid ave. 113, AZ1143, Azerbaijan; Department of Prevention of Sand and Water Appearance, Oil-gas Research and Design Institute, The State Oil Company of the Azerbaijan Republic, H. Zardabi ave. 88, AZ1012 Baku, Azerbaijan.
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17
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Shah V, Jobanputra A, Saxena B, Nivsarkar M. Development and Characterization of Saturated Fatty Acid-Engineered, Silica-Coated Lipid Vesicular System for Effective Oral Delivery of Alfa-Choriogonadotropin. AAPS PharmSciTech 2021; 22:118. [PMID: 33782790 DOI: 10.1208/s12249-021-01985-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Accepted: 03/08/2021] [Indexed: 11/30/2022] Open
Abstract
The present study was designed to develop an efficient, safe, and patient-friendly dosage form, for oral delivery of alfa-choriogonadotropin, used in the treatment of female reproductive infertility. Silica-coated, saturated fatty acid (dipalmitoylphosphatidylcholine (DPPC))-engineered, nanolipidic vesicular (NLVs) system was developed for systemic delivery of therapeutic peptide, alfa-choriogonadotropin, through oral route. DPPC-based NLVs were formulated using the technique of thin-film hydration and were coated with silica to form a homogeneous surface silica shell. The formulated silica-coated NLVs were evaluated for physicochemical and physiologic stability under simulated conditions and were optimized based on physicochemical parameters like particle size, zeta potential, polydispersity index (PDI), entrapment efficiency, and in vitro release profile. Silica-coated, DPPC-based NLVs imparted physicochemical stability to entrapped alfa-choriogonadotropin against the biological environment prevailing in the human gastrointestinal tract (GIT). In vivo, subchronic animal toxicity studies were performed to assess the safety of the designed dosage form. Results of in vitro characterization and in vivo pharmacokinetic studies of fabricated formulation revealed that the silica-coated, DPPC-based NLV formulation was not only stable in human GIT but was also as efficacious as a marketed parenteral formulation for the systemic delivery of alfa-choriogonadotropin. In vivo toxicity studies revealed that silica-coated NLVs did not alter hematological and serum biochemical parameters. The histopathological studies also depicted no macroscopic changes in major organs; thus, the developed formulation was proven to be nontoxic and equally efficient as a marketed parenteral formulation for the delivery of alfa-choriogonadotropin with added benefits of possible self-medication, more patient acceptability, and no chances of infection.
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18
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Encapsulation and <i>In Vitro </i>Controlled Release of Doxycycline in Temperature-Sensitive Hydrogel Composed of Polyethyleneglycol–polypeptide (L-Alanine-co-L-Aspartate). JOURNAL OF BIOMIMETICS BIOMATERIALS AND BIOMEDICAL ENGINEERING 2021. [DOI: 10.4028/www.scientific.net/jbbbe.49.119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Doxycycline was loaded with synthesized micelles composed of methyl Poly (ethylene glycol-block-poly (L-alanine–co–L-aspartate), or mPEG–Ala–Asp, and then characterized as a drug delivery carrier. The synthesis of the temperature-sensitive mPEG–Ala–Asp block copolymer was carried out by two-step ring-opening polymerization: firstly, the mPEG reacts with L-alanine N-carboxylic anhydride, and secondly the resulting mPEG–Ala reacts with benzyl aspartate N-carboxylic anhydride. The molecular structure of the copolymers obtained was determined by FT-IR and NMR spectroscopy methods and the micelles were characterized by SEM, TEM and DLS, respectively. The controlled release of Dox from hydrogel in the presence of PBS (8 to 9% by weight) lasts 6 to 7 days exhibiting stable release rates. The drug release mechanisms were studied: Higuchi and zero order models. The results and correlation coefficients applied to the Higuchi and zero-order models. The findings show the potential use of mPEG–Ala–Asp as an effective depot matrix to deliver anthracycline class drugs.
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19
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New and novel approaches for enhancing the oral absorption and bioavailability of protein and peptides therapeutics. Ther Deliv 2020; 11:713-732. [DOI: 10.4155/tde-2020-0068] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The advancement of the oral route for macromolecules has gained a lot of attention due to its noninvasive nature, safe and challenging in active research but with limited success. Oral administration poses challenges due to poor solubility, short half-life, quick elimination and the physical, chemical and biological barriers of the gastrointestinal tract. Approaches of past for improving oral absorption, such as enhancers, mucoadhesive delivery and enzyme inhibitors have been taken over by novel approaches like advanced liposomes, self-nanoemulsifying drug delivery system, nanoparticles and targeted delivery. Eudratech™ Pep, Peptelligence, Rani Pill and Pharm Film are the emerging technologies for delivering oral proteins and peptide. Calcitonin, semaglutide and octreotide are the peptides available in the market for oral delivery as outcomes of these technologies.
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20
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Abeer MM, Rewatkar P, Qu Z, Talekar M, Kleitz F, Schmid R, Lindén M, Kumeria T, Popat A. Silica nanoparticles: A promising platform for enhanced oral delivery of macromolecules. J Control Release 2020; 326:544-555. [DOI: 10.1016/j.jconrel.2020.07.021] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 07/11/2020] [Accepted: 07/13/2020] [Indexed: 12/15/2022]
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21
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Taguchi K, Chuang VTG, Hashimoto M, Nakayama M, Sakuragi M, Enoki Y, Nishi K, Matsumoto K, Seo H, Otagiri M, Yamasaki K. Characterization of Bovine Lactoferrin Nanoparticle Prepared by Desolvation Technique. Chem Pharm Bull (Tokyo) 2020; 68:766-772. [PMID: 32741918 DOI: 10.1248/cpb.c20-00222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Lactoferrin (Lf) nanoparticles have been developed as a carrier of drugs and gene. Two main methods, desolvation technique and emulsification method, for preparation of protein nanoparticles have been reported so far, but most of the previous reports of Lf nanoparticles preparation are limited to emulsification method. In this study, we investigated the optimal conditions by desolvation technique for the preparation of glutaraldehyde-crosslinked bovine Lf (bLf) nanoparticles within the size range of 100-200 nm, and evaluated their properties as a carrier for oral and intravenous drug delivery. The experimental results of dynamic light scattering and Transmission Electron Microscope suggested that glutaraldehyde-crosslinked bLf nanoparticles with 150 nm in size could be produced by addition of 2-propanol as the desolvating solvent into the bLf solution adjusted to pH 6, followed by crosslinking with glutaraldehyde. These cross-linked bLf nanoparticles were found to be compatible to blood components and resistant against rapid degradation by pepsin. Thus, cross-linked bLf nanoparticles prepared by desolvation technique can be applied as a drug carrier for intravenous administration and oral delivery.
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Affiliation(s)
- Kazuaki Taguchi
- Faculty of Pharmaceutical Sciences, Sojo University.,Faculty of Pharmacy, Keio University
| | - Victor Tuan Giam Chuang
- Faculty of Pharmacy, Keio University.,School of Pharmacy, Monash University Malaysia.,School of Pharmacy and Biomedical Science, Curtin University
| | | | | | | | | | - Koji Nishi
- Faculty of Pharmaceutical Sciences, Sojo University
| | | | - Hakaru Seo
- Faculty of Pharmaceutical Sciences, Sojo University.,DDS Research Institute, Sojo University
| | - Masaki Otagiri
- Faculty of Pharmaceutical Sciences, Sojo University.,DDS Research Institute, Sojo University
| | - Keishi Yamasaki
- Faculty of Pharmaceutical Sciences, Sojo University.,DDS Research Institute, Sojo University
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22
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Pharmacokinetic evaluation of microgels for targeted and sustained delivery of acid labile active pharmaceutical agent in animal model. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2020.101770] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Formulation technologies and advances for oral delivery of novel nitroimidazoles and antimicrobial peptides. J Control Release 2020; 324:728-749. [PMID: 32380201 DOI: 10.1016/j.jconrel.2020.05.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 05/01/2020] [Accepted: 05/02/2020] [Indexed: 02/06/2023]
Abstract
Antibiotic resistance has become a global crisis, driving the exploration for novel antibiotics and novel treatment approaches. Among these research efforts two classes of antibiotics, bicyclic nitroimidazoles and antimicrobial peptides, have recently shown promise as novel antimicrobial agents with the possibility to treat multi-drug resistant infections. However, they suffer from the issue of poor oral bioavailability due to disparate factors: low solubility in the case of nitroimidazoles (BCS class II drugs), and low permeability in the case of peptides (BCS class III drugs). Moreover, antimicrobial peptides present another challenge as they are susceptible to chemical and enzymatic degradation, which can present an additional pharmacokinetic hurdle for their oral bioavailability. Formulation technologies offer a potential means for improving the oral bioavailability of poorly permeable and poorly soluble drugs, but there are still drawbacks and limitations associated with this approach. This review discusses in depth the challenges associated with oral delivery of nitroimidazoles and antimicrobial peptides and the formulation technologies that have been used to overcome these problems, including an assessment of the drawbacks and limitations associated with the technologies that have been applied. Furthermore, the potential for supercritical fluid technology to overcome the shortcomings associated with conventional drug formulation methods is reviewed.
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24
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Li X, Wang S, Zhu X, Zhangsun D, Wu Y, Luo S. Effects of Cyclization on Activity and Stability of α-Conotoxin TxIB. Mar Drugs 2020; 18:E180. [PMID: 32235388 PMCID: PMC7230940 DOI: 10.3390/md18040180] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 03/25/2020] [Accepted: 03/25/2020] [Indexed: 11/17/2022] Open
Abstract
α-Conotoxin TxIB specifically blocked α6/α3β2β3 acetylcholine receptors (nAChRs), and it could be a potential probe for studying addiction and other diseases related to α6/α3β2β3 nAChRs. However, as a peptide, TxIB may suffer from low stability, short half-life, and poor bioavailability. In this study, cyclization of TxIB was used to improve its stability. Four cyclic mutants of TxIB (cTxIB) were synthesized, and the inhibition of these analogues on α6/α3β2β3 nAChRs as well as their stability in human serum were measured. All cyclized analogues had similar activity compared to wild-type TxIB, which indicated that backbone cyclization of TxIB had no significant effect on its activity. Cyclization of TxIB with a seven-residue linker improved its stability significantly in human serum. Besides this, the results showed that cyclization maintained the activity of α-conotoxin TxIB, which is conducive to its future application.
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Affiliation(s)
- Xincan Li
- Key Laboratory of Tropical Biological Resources of Ministry of Education, Key Laboratory for Marine Drugs of Haikou, School of Life and Pharmaceutical Sciences, Hainan University, Haikou 570228, China; (X.L.); (S.W.); (X.Z.); (D.Z.)
| | - Shuai Wang
- Key Laboratory of Tropical Biological Resources of Ministry of Education, Key Laboratory for Marine Drugs of Haikou, School of Life and Pharmaceutical Sciences, Hainan University, Haikou 570228, China; (X.L.); (S.W.); (X.Z.); (D.Z.)
| | - Xiaopeng Zhu
- Key Laboratory of Tropical Biological Resources of Ministry of Education, Key Laboratory for Marine Drugs of Haikou, School of Life and Pharmaceutical Sciences, Hainan University, Haikou 570228, China; (X.L.); (S.W.); (X.Z.); (D.Z.)
| | - Dongting Zhangsun
- Key Laboratory of Tropical Biological Resources of Ministry of Education, Key Laboratory for Marine Drugs of Haikou, School of Life and Pharmaceutical Sciences, Hainan University, Haikou 570228, China; (X.L.); (S.W.); (X.Z.); (D.Z.)
- Medical School, Guangxi University, Nanning 530004, China
| | - Yong Wu
- Key Laboratory of Tropical Biological Resources of Ministry of Education, Key Laboratory for Marine Drugs of Haikou, School of Life and Pharmaceutical Sciences, Hainan University, Haikou 570228, China; (X.L.); (S.W.); (X.Z.); (D.Z.)
- Medical School, Guangxi University, Nanning 530004, China
| | - Sulan Luo
- Key Laboratory of Tropical Biological Resources of Ministry of Education, Key Laboratory for Marine Drugs of Haikou, School of Life and Pharmaceutical Sciences, Hainan University, Haikou 570228, China; (X.L.); (S.W.); (X.Z.); (D.Z.)
- Medical School, Guangxi University, Nanning 530004, China
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25
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Bechaux J, Gatellier P, Le Page JF, Drillet Y, Sante-Lhoutellier V. A comprehensive review of bioactive peptides obtained from animal byproducts and their applications. Food Funct 2020; 10:6244-6266. [PMID: 31577308 DOI: 10.1039/c9fo01546a] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Livestock generates high quantities of residues, which has become a major socioeconomic issue for the meat industry. This review focuses on the identification of bioactive peptides (BPs) in animal byproducts and meat wastes. Firstly, the main bioactivities that peptides can have will be described and the methods for their evaluation will be discussed. Secondly, the various origins of these BPs will be studied. Then, the techniques and tools for the generation of BPs will be detailed in order to discuss, in the final part, how peptides could be used and assimilated. BPs possess diverse biological activities and can be strategic candidates for substituting synthetic molecules. In silico potentiality studies are a helpful tool to understand and predict BPs released from proteins and their potential activities. However, in vitro validation is often required. Although BP use is compelled by strict regulations in relation to the field of application, they are also limited by their low bioavailability and bioaccessibility. Therefore, it is important to test peptide stability during gastrointestinal digestion. Protective strategies have been discussed since their use could improve the stability and effectiveness of BPs.
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Affiliation(s)
- Julia Bechaux
- INRA, UR 370, Qualité des Produits Animaux (QuaPA), Site de Theix, 63122, Saint-Genès Champanelle, France.
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26
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Guo Z, Cao X, DeLoid GM, Sampathkumar K, Ng KW, Loo SCJ, Demokritou P. Physicochemical and Morphological Transformations of Chitosan Nanoparticles across the Gastrointestinal Tract and Cellular Toxicity in an In Vitro Model of the Small Intestinal Epithelium. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:358-368. [PMID: 31815446 DOI: 10.1021/acs.jafc.9b05506] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Nanoscale chitosan materials exhibit size-specific properties that make them useful in agri-food and biomedical applications. Chitosan nanoparticles (Chnps) are being explored as nanocarrier platforms to increase oral bioavailability of drugs and nutraceuticals, but little is known of their fate and transformations in the gastrointestinal tract (GIT) or of their potential toxicity. Here, the GIT fate and cytotoxicity of Chnps, soluble starch-coated Chnps (SS-Chnps), and bulk chitosan powder (Chp), were assessed using a 3-phase simulated digestion and an in vitro cellular small intestinal epithelium model. Physico-chemical characterization revealed dissolution of Chp, but not of Chnps or SS-Chnps, during the gastric phase of digestion, stability of the starch coating of SS-Chnps in the oral and gastric phases, and agglomeration of all materials during the small intestinal phase. A slight but significant (10%, p < 0.01) increase in cytotoxicity (LDH release) was observed with exposure to digested Chnps but not Chp or SS-Chnps.
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Affiliation(s)
- Zhongyuan Guo
- Center for Nanotechnology and Nanotoxicology, Department of Environmental Health , Harvard T. H. Chan School of Public Health , Boston , Massachusetts 02115 , United States
| | - Xiaoqiong Cao
- Center for Nanotechnology and Nanotoxicology, Department of Environmental Health , Harvard T. H. Chan School of Public Health , Boston , Massachusetts 02115 , United States
| | - Glen M DeLoid
- Center for Nanotechnology and Nanotoxicology, Department of Environmental Health , Harvard T. H. Chan School of Public Health , Boston , Massachusetts 02115 , United States
| | - Kaarunya Sampathkumar
- School of Materials Science and Engineering , Nanyang Technological University 50 Nanyang Avenue , Singapore 639798 , Singapore
| | - Kee Woei Ng
- Center for Nanotechnology and Nanotoxicology, Department of Environmental Health , Harvard T. H. Chan School of Public Health , Boston , Massachusetts 02115 , United States
- School of Materials Science and Engineering , Nanyang Technological University 50 Nanyang Avenue , Singapore 639798 , Singapore
- Skin Research Institute of Singapore , 8A Biomedical Grove, #06-06 Immunos , Singapore 138648 , Singapore
- Environmental Chemistry and Materials Centre , Nanyang Environment & Water Research Institute , 1 Cleantech Loop, CleanTech One , Singapore 637141 , Singapore
| | - Say Chye Joachim Loo
- School of Materials Science and Engineering , Nanyang Technological University 50 Nanyang Avenue , Singapore 639798 , Singapore
| | - Philip Demokritou
- Center for Nanotechnology and Nanotoxicology, Department of Environmental Health , Harvard T. H. Chan School of Public Health , Boston , Massachusetts 02115 , United States
- School of Materials Science and Engineering , Nanyang Technological University 50 Nanyang Avenue , Singapore 639798 , Singapore
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27
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Feoktistova NA, Balabushevich NG, Skirtach AG, Volodkin D, Vikulina AS. Inter-protein interactions govern protein loading into porous vaterite CaCO3 crystals. Phys Chem Chem Phys 2020; 22:9713-9722. [DOI: 10.1039/d0cp00404a] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Loading of therapeutic proteins into mesoporous vaterite crystals is driven by inter-protein interactions in bulk solution and inside the crystals.
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Affiliation(s)
- Natalia A. Feoktistova
- Department of Chemistry
- Lomonosov Moscow State University
- 119991 Moscow
- Russia
- Fraunhofer Institute for Cell Therapy and Immunology
| | | | - Andre G. Skirtach
- Department of Biotechnology & NB-Photonics
- University of Ghent
- 9000 Gent
- Belgium
| | - Dmitry Volodkin
- Department of Chemistry
- Lomonosov Moscow State University
- 119991 Moscow
- Russia
- School of Science and Technology
| | - Anna S. Vikulina
- Fraunhofer Institute for Cell Therapy and Immunology
- Branch Bioanalytics and Bioprocesses
- 14476 Potsdam-Golm
- Germany
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28
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Affiliation(s)
- Bongrae Cho
- Department of Applied ChemistryCheongju University Cheongju 28503 South Korea
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29
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Meerovich I, Smith DD, Dash AK. Direct solid-phase peptide synthesis on chitosan microparticles for targeting tumor cells. J Drug Deliv Sci Technol 2019. [DOI: 10.1016/j.jddst.2019.101288] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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30
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Qin X, Yu C, Wei J, Li L, Zhang C, Wu Q, Liu J, Yao SQ, Huang W. Rational Design of Nanocarriers for Intracellular Protein Delivery. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1902791. [PMID: 31496027 DOI: 10.1002/adma.201902791] [Citation(s) in RCA: 141] [Impact Index Per Article: 28.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 07/04/2019] [Indexed: 06/10/2023]
Abstract
Protein/antibody therapeutics have exhibited the advantages of high specificity and activity even at an extremely low concentration compared to small molecule drugs. However, they are accompanied by unfavorable physicochemical properties such as fragile tertiary structure, large molecular size, and poor penetration of the membrane, and thus the clinical use of protein drugs is hindered by inefficient delivery of proteins into the host cells. To overcome the challenges associated with protein therapeutics and enhance their biopharmaceutical applications, various protein-loaded nanocarriers with desired functions, such as lipid nanocapsules, polymeric nanoparticles, inorganic nanoparticles, and peptides, are developed. In this review, the different strategies for intracellular delivery of proteins are comprehensively summarized. Their designed routes, mechanisms of action, and potential therapeutics in live cells or in vivo are discussed in detail. Furthermore, the perspective on the new generation of delivery systems toward the emerging area of protein-based therapeutics is presented as well.
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Affiliation(s)
- Xiaofei Qin
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211800, P. R. China
| | - Changmin Yu
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211800, P. R. China
| | - Jing Wei
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211800, P. R. China
| | - Lin Li
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211800, P. R. China
| | - Chengwu Zhang
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211800, P. R. China
| | - Qiong Wu
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211800, P. R. China
| | - Jinhua Liu
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211800, P. R. China
| | - Shao Q Yao
- Department of Chemistry, National University of Singapore, Singapore, 117543, Singapore
| | - Wei Huang
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211800, P. R. China
- Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, P. R. China
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31
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Adhikari S, Leissa JA, Karlsson AJ. Beyond function: Engineering improved peptides for therapeutic applications. AIChE J 2019. [DOI: 10.1002/aic.16776] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Sayanee Adhikari
- Department of Chemical and Biomolecular Engineering University of Maryland College Park Maryland
| | - Jesse A. Leissa
- Department of Chemical and Biomolecular Engineering University of Maryland College Park Maryland
| | - Amy J. Karlsson
- Department of Chemical and Biomolecular Engineering University of Maryland College Park Maryland
- Fischell Department of Bioengineering University of Maryland College Park Maryland
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32
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Jain D, Mahammad SS, Singh PP, Kodipyaka R. A review on parenteral delivery of peptides and proteins. Drug Dev Ind Pharm 2019; 45:1403-1420. [DOI: 10.1080/03639045.2019.1628770] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Divisha Jain
- Custom Pharma Services (CPS), Dr. Reddy’s Laboratories Ltd, Hyderabad, India
| | - S. Shahe Mahammad
- Custom Pharma Services (CPS), Dr. Reddy’s Laboratories Ltd, Hyderabad, India
| | - Pirthi Pal Singh
- Custom Pharma Services (CPS), Dr. Reddy’s Laboratories Ltd, Hyderabad, India
| | - Ravinder Kodipyaka
- Custom Pharma Services (CPS), Dr. Reddy’s Laboratories Ltd, Hyderabad, India
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33
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Xu Q, Hong H, Wu J, Yan X. Bioavailability of bioactive peptides derived from food proteins across the intestinal epithelial membrane: A review. Trends Food Sci Technol 2019. [DOI: 10.1016/j.tifs.2019.02.050] [Citation(s) in RCA: 122] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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34
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Wang K, Su Y, Liang Y, Song Y, Wang L. Oral DhHP-6 for the Treatment of Type 2 Diabetes Mellitus. Int J Mol Sci 2019; 20:ijms20061517. [PMID: 30917579 PMCID: PMC6470840 DOI: 10.3390/ijms20061517] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2019] [Revised: 03/15/2019] [Accepted: 03/22/2019] [Indexed: 12/16/2022] Open
Abstract
Type 2 diabetes mellitus (T2DM) is associated with pancreatic β-cell dysfunction which can be induced by oxidative stress. Deuterohemin-βAla-His-Thr-Val-Glu-Lys (DhHP-6) is a microperoxidase mimetic that can scavenge reactive oxygen species (ROS) in vivo. In our previous studies, we demonstrated an increased stability of linear peptides upon their covalent attachment to porphyrins. In this study, we assessed the utility of DhHP-6 as an oral anti-diabetic drug in vitro and in vivo. DhHP-6 showed high resistance to proteolytic degradation in vitro and in vivo. The degraded DhHP-6 product in gastrointestinal (GI) fluid retained the enzymatic activity of DhHP-6, but displayed a higher permeability coefficient. DhHP-6 protected against the cell damage induced by H2O2 and promoted insulin secretion in INS-1 cells. In the T2DM model, DhHP-6 reduced blood glucose levels and facilitated the recovery of blood lipid disorders. DhHP-6 also mitigated both insulin resistance and glucose tolerance. Most importantly, DhHP-6 promoted the recovery of damaged pancreas islets. These findings suggest that DhHP-6 in physiological environments has high stability against enzymatic degradation and maintains enzymatic activity. As DhHP-6 lowered the fasting blood glucose levels of T2DM mice, it thus represents a promising candidate for oral administration and clinical therapy.
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Affiliation(s)
- Kai Wang
- School of life Sciences, Jilin University, Changchun 130012, China.
| | - Yu Su
- School of life Sciences, Jilin University, Changchun 130012, China.
| | - Yuting Liang
- School of life Sciences, Jilin University, Changchun 130012, China.
| | - Yanhui Song
- School of life Sciences, Jilin University, Changchun 130012, China.
| | - Liping Wang
- School of life Sciences, Jilin University, Changchun 130012, China.
- Key Laboratory for Molecular Enzymology and Engineering, the Ministry of Education, Jilin University, Changchun 130012, China.
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35
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Zeng Z, Dong C, Zhao P, Liu Z, Liu L, Mao H, Leong KW, Gao X, Chen Y. Scalable Production of Therapeutic Protein Nanoparticles Using Flash Nanoprecipitation. Adv Healthc Mater 2019; 8:e1801010. [PMID: 30338666 DOI: 10.1002/adhm.201801010] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 09/27/2018] [Indexed: 12/28/2022]
Abstract
Flash nanoprecipitation (FNP) by fast mixing of drug-containing organic solvent and water in a microchamber is a powerful and scalable technology to produce solid drug nanoparticles with high payload. The embedded therapeutic drugs, however, are largely limited to hydrophobic small molecules. By transferring proteins into organic solvent via hydrophobic ion pairing, the scope of FNP applications is expanded. This platform technology is capable of producing protein nanoparticles with tunable sizes (from ≈30 nm to sub-micrometers), high-production scale (grams per hour), high drug loading efficiency (>90%), and excellent reproducibility, opening a new paradigm for formulation of biological pharmaceuticals. As a proof-of-concept, insulin nanoparticles are made to address a major medical challenge; oral administration. A relative insulin bioavailability of 13.2% is achieved, enabling sustained reduction of blood glucose levels in a diabetic rat model.
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Affiliation(s)
- Zhipeng Zeng
- School of Materials Science and EngineeringCenter of Functional BiomaterialsKey Laboratory of Polymeric Composite Materials and Functional Materials of Ministry of EducationGD Research Center for Functional Biomaterials Engineering and TechnologySun Yat‐sen University Guangzhou 510275 China
| | - Cong Dong
- School of Materials Science and EngineeringCenter of Functional BiomaterialsKey Laboratory of Polymeric Composite Materials and Functional Materials of Ministry of EducationGD Research Center for Functional Biomaterials Engineering and TechnologySun Yat‐sen University Guangzhou 510275 China
| | - Pengfei Zhao
- School of Materials Science and EngineeringCenter of Functional BiomaterialsKey Laboratory of Polymeric Composite Materials and Functional Materials of Ministry of EducationGD Research Center for Functional Biomaterials Engineering and TechnologySun Yat‐sen University Guangzhou 510275 China
| | - Zhijia Liu
- School of Materials Science and EngineeringCenter of Functional BiomaterialsKey Laboratory of Polymeric Composite Materials and Functional Materials of Ministry of EducationGD Research Center for Functional Biomaterials Engineering and TechnologySun Yat‐sen University Guangzhou 510275 China
| | - Lixin Liu
- School of Materials Science and EngineeringCenter of Functional BiomaterialsKey Laboratory of Polymeric Composite Materials and Functional Materials of Ministry of EducationGD Research Center for Functional Biomaterials Engineering and TechnologySun Yat‐sen University Guangzhou 510275 China
| | - Hai‐Quan Mao
- Institute for NanoBioTechnology and Department of Materials Science and EngineeringJohns Hopkins University Baltimore MD 21218 USA
- Department of Biomedical Engineering and Translational Tissue Engineering CenterJohns Hopkins University School of Medicine Baltimore MD 21287 USA
| | - Kam W. Leong
- Department of Biomedical EngineeringColumbia University New York NY 10027 USA
| | - Xiaohu Gao
- Department of BioengineeringUniversity of Washington Seattle WA 98195 USA
| | - Yongming Chen
- School of Materials Science and EngineeringCenter of Functional BiomaterialsKey Laboratory of Polymeric Composite Materials and Functional Materials of Ministry of EducationGD Research Center for Functional Biomaterials Engineering and TechnologySun Yat‐sen University Guangzhou 510275 China
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36
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Comparative Analysis of Protein Quantification Methods for the Rapid Determination of Protein Loading in Liposomal Formulations. Pharmaceutics 2019; 11:pharmaceutics11010039. [PMID: 30669330 PMCID: PMC6358724 DOI: 10.3390/pharmaceutics11010039] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 01/08/2019] [Accepted: 01/09/2019] [Indexed: 11/17/2022] Open
Abstract
Advances in manufacturing processes provide the ability for the high throughput production of liposomes containing a range of moieties, from small molecules to large biologicals (including proteins and nucleic acids for prophylactic and therapeutic applications). Whilst rapid quantification methods for small molecules are generally well established, the ability to rapidly quantify liposomal entrapment of proteins is limited. Indeed, most standard protein quantification techniques (including the BCA assay and Reverse phase-high performance liquid chromatography (RP-HPLC)) measure protein encapsulation indirectly, by measuring the amount of non-incorporated drug, and subtracting from the initial amount of protein added. However, this can give inaccurate and misrepresentative results. To address this, we have developed a range of methods to directly quantify protein entrapment within liposomes. The encapsulation efficiency within neutral, anionic and cationic liposome formulations was determined by three techniques; BCA assay, RP-HPLC and HPLC coupled to an evaporative light scattering detector, (HPLC-ELSD). All three methods are reliable for the quantification of protein, with linear responses and correlation coefficients of 0.99, and LOQ for all three methods being less than 10 µg/mL. Here within, we provide three methods for the rapid and robust quantification of protein loading within liposomal (and other bilayer) vesicle systems.
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37
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Rashid Z, Ranjha NM, Rashid F, Razzaq R. Pharmacokinetic evaluation of novel pH-sensitive poly(2-methoxyethyl methacrylate-co-itaconic acid) microgels in rabbits. ADVANCES IN POLYMER TECHNOLOGY 2018. [DOI: 10.1002/adv.22164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Zermina Rashid
- Department of Pharmacy; The Women University Multan; Multan Pakistan
- Faculty of Pharmacy; Bahauddin Zakariya University; Multan Pakistan
| | | | - Fareeha Rashid
- Department of Statistics; Bahauddin Zakariya University; Multan Pakistan
| | - Rabia Razzaq
- Faculty of Pharmacy; Bahauddin Zakariya University; Multan Pakistan
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38
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Karaś M. Influence of physiological and chemical factors on the absorption of bioactive peptides. Int J Food Sci Technol 2018. [DOI: 10.1111/ijfs.14054] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Monika Karaś
- Department of Biochemistry and Food Chemistry University of Life Sciences Skromna Str. 8 20‐704 Lublin Poland
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39
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Pharmacodynamical effects of orally administered exenatide nanoparticles embedded in gastro-resistant microparticles. Eur J Pharm Biopharm 2018; 133:214-223. [DOI: 10.1016/j.ejpb.2018.10.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 10/17/2018] [Accepted: 10/17/2018] [Indexed: 01/22/2023]
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40
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Abstract
With the increasing utilization of high-throughput screening for lead identification in drug discovery, the need for easily constructed and diverse libraries which cover significant chemical space is greater than ever. Cyclic peptides address this need; they combine the advantageous properties of peptides (ease of production, high diversity, high potential specificity) with increased resistance to proteolysis and often increased biological activity (due to conformational locking). There are a number of techniques for the generation and screening of cyclic peptide libraries. As drug discovery moves toward tackling challenging targets, such as protein-protein interactions, cyclic peptide libraries are expected to continue producing hits where small molecule libraries may be stymied. However, it is important to design robust systems for the generation and screening of these large libraries, and to be able to make sense of structure-activity relationships in these highly variable scaffolds. There are a plethora of possible modifications that can be made to cyclic peptides, which is both a weakness and a strength of these scaffolds; high variability will allow more precise tuning of leads to targets, but exploring the whole range of modifications may become an overwhelming challenge.
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41
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Yang ST, Park YS. Release pattern of dexamethasone after administration through an implant-mediated drug delivery device with an active plunger of super absorbent polymer. Drug Deliv Transl Res 2018; 8:702-707. [PMID: 29626335 DOI: 10.1007/s13346-018-0516-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The implant-mediated drug delivery system (IMDDS) is a novel, innovative device that allows drug delivery through bone marrow. The purpose of this study was to investigate the effect of an active plunger component made of super absorbent polymer (SAP) on the plasma concentration of dexamethasone released from the IMDDS. The IMDDSs were installed in a total of 18 rabbits. After complete healing, dexamethasone was loaded with the SAP active plunger and with water to cause expansion in the test group (n = 9), while only the drug was loaded in the control group, as per the original protocol (n = 9). The release patterns of each group were monitored for 2 weeks by measuring the plasma concentration of the drug. Both groups showed sustained release of drug. However, the test groups showed more rapid increase in plasma concentration and higher area under the curve (AUC) throughout the observation period. The incorporation of a SAP active plunger component in the IMDDS resulted in an increase in initial release of drug and higher bioavailability within the observation period of 2 weeks after dexamethasone administration.
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Affiliation(s)
- Sung-Tae Yang
- Department of Oral Anatomy, School of Dentistry, Seoul National University and Dental Research Institute, 101 Daehak-ro, Jongno-gu, Seoul, 03080, South Korea
| | - Young-Seok Park
- Department of Oral Anatomy, School of Dentistry, Seoul National University and Dental Research Institute, 101 Daehak-ro, Jongno-gu, Seoul, 03080, South Korea.
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42
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Raaymakers C, Verbrugghe E, Stijlemans B, Martel A, Pasmans F, Roelants K. The anuran skin peptide bradykinin mediates its own absorption across epithelial barriers of the digestive tract. Peptides 2018; 103:84-89. [PMID: 29571654 DOI: 10.1016/j.peptides.2018.03.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2018] [Revised: 03/14/2018] [Accepted: 03/15/2018] [Indexed: 01/23/2023]
Abstract
When faced with a potential predator, a wide range of frog species secrete a mixture of peptide toxins from their skin to defend themselves. We have recently shown that antimicrobial peptides (AMPs) in a frog's defensive poison enhance the uptake of these peptides across epithelia, thereby speeding up the process of predator intoxication. This study provides evidence that bradykinin, a widespread peptide toxin in anurans (frogs), is capable to pass through epithelial barriers independent of this delivery system. We quantified bradykinin peptides secreted by Bombina orientalis during acute stress, and found that at biologically relevant concentrations, bradykinin passage across model epithelia occurs even in the absence of AMPs. Monitoring of transepithelial electric resistance showed that bradykinin treatment caused a subtle yet prolonged reduction in barrier function, indicating that the peptide itself is capable to increase the permeability of epithelia. Yet, bradykinin does not cause cells to leak lactate dehydrogenase, suggesting that it does not damage cell membranes. Moreover, imaging of bradykinin-treated monolayers shows no endocytosis of fluorescent propidium iodide, indicating that the peptide does not perforate cell membranes at smaller scale and therefore is unlikely to cross epithelia via a transcellular passage. Together, these observations suggest that bradykinin, unlike other amphibian neuropeptide toxins, mediates its own passage across mucosal barriers, possibly through a paracellular route. This "self-administering" property, combined with the fact that bradykinins can potently disturb multiple physiological processes, could explain why these peptides are one of the most widespread antipredator peptides in the defensive secretions of frogs.
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Affiliation(s)
- Constantijn Raaymakers
- Amphibian Evolution Lab, Biology Department, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Elsene, Belgium; Department of Pathology, Bacteriology, and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | - Elin Verbrugghe
- Department of Pathology, Bacteriology, and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | - Benoit Stijlemans
- Unit of Cellular and Molecular Immunology, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Elsene, Belgium; Myeloid Cell Immunology Lab, VIB Centre for Inflammation Research, Brussels, Belgium
| | - An Martel
- Department of Pathology, Bacteriology, and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | - Frank Pasmans
- Department of Pathology, Bacteriology, and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | - Kim Roelants
- Amphibian Evolution Lab, Biology Department, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Elsene, Belgium.
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43
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Arregui JR, Kovvasu SP, Betageri GV. Daptomycin Proliposomes for Oral Delivery: Formulation, Characterization, and In Vivo Pharmacokinetics. AAPS PharmSciTech 2018; 19:1802-1809. [PMID: 29616488 DOI: 10.1208/s12249-018-0989-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Accepted: 03/08/2018] [Indexed: 01/23/2023] Open
Abstract
The aim of this study was to develop a proliposomal formulation of lipopeptide antibiotic drug daptomycin (DAP) for oral delivery. Thin film hydration was the selected method for preparation of proliposomes. Different phospholipids including soy-phosphatidylcholine (SPC), hydrogenated egg-phosphatidylcholine (HEPC), and distearoyl-phosphatidylcholine (DSPC) were evaluated in combination with cholesterol. The inclusion of surface charge modifiers in the formulation such as dicetyl phosphate (DCP) and stearylamine (SA) to enhance drug encapsulation was also evaluated. Particle size, surface charge, and encapsulation efficiency were performed on daptomycin-hydrated proliposomes as part of physical characterization. USP type II dissolution apparatus with phosphate buffer (pH 6.8) was used for in vitro drug release studies. Optimized formulation was evaluated for in vivo pharmacokinetics after oral administration to Sprague-Dawley rats. Proliposomes composed of SPC exhibited higher entrapment efficiency than those containing HEPC or DSPC. The highest entrapment efficiency was achieved by positively charged SPC-SA proliposomes, showing an encapsulation efficiency of 92% and a zeta potential of + 28 mV. In vitro drug release of optimized formulation demonstrated efficient drug retention totaling for less than 20% drug release within the first 60 min and only 42% drug release after 2 h. Pharmacokinetic parameters after single oral administration of optimized proliposomal formulation indicated a significant increase in oral bioavailability of DAP administered as SPC-SA proliposomes when compared to drug solution. Based on these results, incorporation of charge modifiers into proliposomes may increase drug loading and proliposomes an attractive carrier for oral delivery of daptomycin.
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44
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Dumont C, Bourgeois S, Fessi H, Jannin V. Lipid-based nanosuspensions for oral delivery of peptides, a critical review. Int J Pharm 2018; 541:117-135. [DOI: 10.1016/j.ijpharm.2018.02.038] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Revised: 02/19/2018] [Accepted: 02/20/2018] [Indexed: 12/19/2022]
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45
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Iwao Y, Tomiguchi I, Domura A, Mantaira Y, Minami A, Suzuki T, Ikawa T, Kimura SI, Itai S. Inflamed site-specific drug delivery system based on the interaction of human serum albumin nanoparticles with myeloperoxidase in a murine model of experimental colitis. Eur J Pharm Biopharm 2018; 125:141-147. [DOI: 10.1016/j.ejpb.2018.01.016] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 01/23/2018] [Accepted: 01/28/2018] [Indexed: 01/10/2023]
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46
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Rehmani S, Dixon JE. Oral delivery of anti-diabetes therapeutics using cell penetrating and transcytosing peptide strategies. Peptides 2018; 100:24-35. [PMID: 29412825 DOI: 10.1016/j.peptides.2017.12.014] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 12/15/2017] [Accepted: 12/16/2017] [Indexed: 02/03/2023]
Abstract
Oral delivery of insulin and other anti-diabetic peptides is inhibited by low intestinal absorption caused by the poor permeability across cellular membranes and the susceptibility to enzymatic degradation in the gastrointestinal tract. Cell-penetrating peptides (CPPs) have been investigated for a number of years as oral absorption enhancers for hydrophilic macromolecules by electrostatic or covalent conjugation on in conjunction with nanotechnology. Endogenous cellular uptake mechanisms present in the intestine can be exploited by engineering peptide conjugates that transcytose; entering cells by endocytosis and leaving by exocytosis. Efficiently delivering hydrophilic and sensitive peptide drugs to safely transverse the digestive barrier with no effect on gut physiology using remains a key driver for formulation research. Here we review the use of CPP and transcytosis peptide approaches, their modification and use in delivering anti-diabetic peptides (with the primary example of Insulin and engineered homologues) by direct oral administration to treat diabetes and associated metabolic disorders.
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Affiliation(s)
- Sahrish Rehmani
- Wolfson Centre for Stem Cells, Tissue Engineering, and Modelling (STEM), Centre of Biomolecular Sciences, School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK
| | - James E Dixon
- Wolfson Centre for Stem Cells, Tissue Engineering, and Modelling (STEM), Centre of Biomolecular Sciences, School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK.
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47
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Sedyakina NE, Silaeva AO, Krivoshchepov AF, Avramenko GV. Preparation and properties of chitosan microspheres based on polyglycerol polyricinoleate stabilized emulsions. MENDELEEV COMMUNICATIONS 2018. [DOI: 10.1016/j.mencom.2018.01.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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48
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Frizzell H, Ohlsen TJ, Woodrow KA. Protein-loaded emulsion electrospun fibers optimized for bioactivity retention and pH-controlled release for peroral delivery of biologic therapeutics. Int J Pharm 2017; 533:99-110. [PMID: 28941831 PMCID: PMC5654553 DOI: 10.1016/j.ijpharm.2017.09.043] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Revised: 08/23/2017] [Accepted: 09/16/2017] [Indexed: 10/18/2022]
Abstract
Biologics are the most rapidly growing class of therapeutics, but commonly suffer from low stability. Peroral administration of these therapeutics is an attractive delivery route; however, this route introduces unique physiological challenges that increase the susceptibility of proteins to lose function. Formulation of proteins into biomaterials, such as electrospun fibers, is one strategy to overcome these barriers, but such platforms need to be optimized to ensure protein stability and maintenance of bioactivity during the formulation process. This work develops an emulsion electrospinning method to load proteins into Eudragit® L100 fibers for peroral delivery. Horseradish peroxidase and alkaline phosphatase are encapsulated with high efficiency into fibers and released with pH-specificity. Recovery of protein bioactivity is enhanced through reduction of the emulsion aqueous phase and the inclusion of a hydrophilic polymer excipient. Finally, we show that formulation of proteins in lyophilized electrospun fibers extends the therapeutic shelf life compared to aqueous storage. Thus, this platform shows promise as a novel dosage form for the peroral delivery of biotherapeutics.
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Affiliation(s)
- Hannah Frizzell
- Department of Bioengineering, University of Washington, 3720 15th Ave NE, Seattle, WA 98195, USA
| | - Tiffany J Ohlsen
- Department of Bioengineering, University of Washington, 3720 15th Ave NE, Seattle, WA 98195, USA
| | - Kim A Woodrow
- Department of Bioengineering, University of Washington, 3720 15th Ave NE, Seattle, WA 98195, USA.
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Shen ZT, Sigalov AB. Novel TREM-1 Inhibitors Attenuate Tumor Growth and Prolong Survival in Experimental Pancreatic Cancer. Mol Pharm 2017; 14:4572-4582. [PMID: 29095622 DOI: 10.1021/acs.molpharmaceut.7b00711] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Pancreatic cancer (PC) is a highly lethal cancer with an urgent need to expand the limited treatment options for patients. Tumor-associated macrophages (TAMs) promote tumor aggressiveness and metastasis. High expression of triggering receptor expressed on myeloid cells 1 (TREM-1) on TAMs directly correlates with poor survival in patients with non-small cell lung cancer (NSCLC). We have previously hypothesized that blockade of TREM-1 could be a promising therapeutic strategy to treat cancer and shown that the novel, ligand-independent TREM-1 inhibitory peptides rationally designed using the signaling chain homooligomerization (SCHOOL) strategy suppress NSCLC growth in vivo. Here, we evaluated the therapeutic potential of these inhibitors in three human PC xenograft mouse models. Administration of SCHOOL peptides resulted in a strong antitumor effect achieving an optimal treatment/control (T/C) value of 19% depending on the xenograft and formulation used and persisting even after treatment was halted. The effect correlated significantly with increased survival and suppressed TAM infiltration. The peptides were well-tolerated when deployed either in free form or formulated into lipopeptide complexes for peptide half-life extension and targeted delivery. Finally, blockade of TREM-1 significantly reduced serum levels of interleukin (IL)-1α, IL-6, and macrophage colony-stimulating factor (M-CSF), but not vascular endothelial growth factor, suggesting M-CSF-dependent antitumor mechanisms. Collectively, these promising data suggest that SCHOOL TREM-1-specific peptide inhibitors have a cancer type independent, therapeutically beneficial antitumor activity and can be potentially used as a stand-alone therapy or as a component of combinational therapy for PC, NSCLC, and other solid tumors.
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Affiliation(s)
- Zu T Shen
- SignaBlok, Inc. , P.O. Box 4064, Shrewsbury, Massachusetts 01545, United States
| | - Alexander B Sigalov
- SignaBlok, Inc. , P.O. Box 4064, Shrewsbury, Massachusetts 01545, United States
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50
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Ji N, Hong Y, Gu Z, Cheng L, Li Z, Li C. Binary and Tertiary Complex Based on Short-Chain Glucan and Proanthocyanidins for Oral Insulin Delivery. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:8866-8874. [PMID: 28925252 DOI: 10.1021/acs.jafc.7b03465] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The present study was performed to investigate binary and tertiary nanocomposites between short-chain glucan (SCG) and proanthocyanidins (PAC) for the oral delivery of insulin. There was a large decrease in fluorescence intensity of insulin in the presence of SCG or the combination of SCG with PAC. Fourier transform infrared spectroscopy revealed that the binary and tertiary nanocomposites were synthesized due to the hydrogen bonding and hydrophobic interactions. The insulin entrapped in the nanocomposites was in an amorphous state confirmed by X-ray diffraction. The cell culture demonstrated that both the nanocomposites showed no detectable cytotoxicity with relative cell viability all above 85%. The pharmacological bioavailability after oral administration of insulin-SCG-PAC at a dose of 100 IU/kg was found to be 6.98 ± 1.20% in diabetic rats without any sharp fluctuations in 8 h.
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Affiliation(s)
- Na Ji
- State Key Laboratory of Food Science and Technology, and ‡School of Food Science and Technology, Jiangnan University , Wuxi 214122, People's Republic of China
| | - Yan Hong
- State Key Laboratory of Food Science and Technology, and ‡School of Food Science and Technology, Jiangnan University , Wuxi 214122, People's Republic of China
| | - Zhengbiao Gu
- State Key Laboratory of Food Science and Technology, and ‡School of Food Science and Technology, Jiangnan University , Wuxi 214122, People's Republic of China
| | - Li Cheng
- State Key Laboratory of Food Science and Technology, and ‡School of Food Science and Technology, Jiangnan University , Wuxi 214122, People's Republic of China
| | - Zhaofeng Li
- State Key Laboratory of Food Science and Technology, and ‡School of Food Science and Technology, Jiangnan University , Wuxi 214122, People's Republic of China
| | - Caiming Li
- State Key Laboratory of Food Science and Technology, and ‡School of Food Science and Technology, Jiangnan University , Wuxi 214122, People's Republic of China
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