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Gholap AD, Kapare HS, Pagar S, Kamandar P, Bhowmik D, Vishwakarma N, Raikwar S, Garkal A, Mehta TA, Rojekar S, Hatvate N, Mohanto S. Exploring modified chitosan-based gene delivery technologies for therapeutic advancements. Int J Biol Macromol 2024; 260:129581. [PMID: 38266848 DOI: 10.1016/j.ijbiomac.2024.129581] [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: 11/09/2023] [Revised: 12/26/2023] [Accepted: 01/06/2024] [Indexed: 01/26/2024]
Abstract
One of the critical steps in gene therapy is the successful delivery of the genes. Immunogenicity and toxicity are major issues for viral gene delivery systems. Thus, non-viral vectors are explored. A cationic polysaccharide like chitosan could be used as a nonviral gene delivery vector owing to its significant interaction with negatively charged nucleic acid and biomembrane, providing effective cellular uptake. However, the native chitosan has issues of targetability, unpacking ability, and solubility along with poor buffer capability, hence requiring modifications for effective use in gene delivery. Modified chitosan has shown that the "proton sponge effect" involved in buffering the endosomal pH results in osmotic swelling owing to the accumulation of a greater amount of proton and chloride along with water. The major challenges include limited exploration of chitosan as a gene carrier, the availability of high-purity chitosan for toxicity reduction, and its immunogenicity. The genetic drugs are in their infancy phase and require further exploration for effective delivery of nucleic acid molecules as FDA-approved marketed formulations soon.
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Affiliation(s)
- Amol D Gholap
- Department of Pharmaceutics, St. John Institute of Pharmacy and Research, Palghar 401404, Maharashtra, India
| | - Harshad S Kapare
- Department of Pharmaceutics, Dr. D. Y. Patil Institute of Pharmaceutical Sciences and Research, Pune 411018, Maharashtra, India
| | - Sakshi Pagar
- Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology, Mumbai 400019, India
| | - Pallavi Kamandar
- Institute of Chemical Technology, Mumbai, Marathwada Campus, Jalna 431203, India
| | - Deblina Bhowmik
- Institute of Chemical Technology, Mumbai, Marathwada Campus, Jalna 431203, India
| | - Nikhar Vishwakarma
- Department of Pharmacy, Gyan Ganga Institute of Technology and Sciences, Jabalpur 482003, Madhya Pradesh, India
| | - Sarjana Raikwar
- Department of Pharmaceutical Sciences, Dr. Harisingh Gour Central University, Sagar 470003, Madhya Pradesh, India
| | - Atul Garkal
- Department of Pharmaceutics, Institute of Pharmacy, Nirma University, Ahmedabad 382481, Gujrat, India
| | - Tejal A Mehta
- Department of Pharmaceutics, Institute of Pharmacy, Nirma University, Ahmedabad 382481, Gujrat, India
| | - Satish Rojekar
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.
| | - Navnath Hatvate
- Institute of Chemical Technology, Mumbai, Marathwada Campus, Jalna 431203, India.
| | - Sourav Mohanto
- Department of Pharmaceutics, Yenepoya Pharmacy College & Research Centre, Yenepoya (Deemed to be University), Mangaluru, Karnataka 575018, India
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Niloy KK, Lowe TL. Injectable systems for long-lasting insulin therapy. Adv Drug Deliv Rev 2023; 203:115121. [PMID: 37898336 DOI: 10.1016/j.addr.2023.115121] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Revised: 10/20/2023] [Accepted: 10/25/2023] [Indexed: 10/30/2023]
Abstract
Insulin therapy is the mainstay to treat diabetes characterizedd by hyperglycemia. However, its short half-life of only 4-6 min limits its effectiveness in treating chronic diabetes. Advances in recombinant DNA technology and protein engineering have led to several insulin analogue products that have up to 42 h of glycemic control. However, these insulin analogues still require once- or twice-daily injections for optimal glycemic control and have poor patient compliance and adherence issues. To achieve insulin release for more than one day, different injectable delivery systems including microspheres, in situ forming depots, nanoparticles and composite systems have been developed. Several of these delivery systems have advanced to clinical trials for once-weekly insulin injection. This review comprehensively summarizes the developments of injectable insulin analogs and delivery systems covering the whole field of injectable long-lasting insulin technologies from prototype design, preclinical studies, clinical trials to marketed products for the treatment of diabetes.
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Affiliation(s)
- Kumar Kulldeep Niloy
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center, Memphis, TN 38163, USA; Department of Pharmaceutical Sciences, St. Jude Children's Research Hospital, Memphis, TN 38105, USA.
| | - Tao L Lowe
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center, Memphis, TN 38163, USA; Department of Oral and Maxillofacial Surgery, School of Dentistry, University of Maryland, Baltimore, MD 21201, USA; Fischell Department of Bioengineering, A. James Clark School of Engineering, University of Maryland, College Park, MD 20742, USA.
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Wang H, Wang X, Lai K, Yan J. Stimulus-Responsive DNA Hydrogel Biosensors for Food Safety Detection. BIOSENSORS 2023; 13:320. [PMID: 36979532 PMCID: PMC10046603 DOI: 10.3390/bios13030320] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 02/21/2023] [Accepted: 02/22/2023] [Indexed: 06/18/2023]
Abstract
Food safety has always been a major global challenge to human health and the effective detection of harmful substances in food can reduce the risk to human health. However, the food industry has been plagued by a lack of effective and sensitive safety monitoring methods due to the tension between the cost and effectiveness of monitoring. DNA-based hydrogels combine the advantages of biocompatibility, programmability, the molecular recognition of DNA molecules, and the hydrophilicity of hydrogels, making them a hotspot in the research field of new nanomaterials. The stimulus response property greatly broadens the function and application range of DNA hydrogel. In recent years, DNA hydrogels based on stimulus-responsive mechanisms have been widely applied in the field of biosensing for the detection of a variety of target substances, including various food contaminants. In this review, we describe the recent advances in the preparation of stimuli-responsive DNA hydrogels, highlighting the progress of its application in food safety detection. Finally, we also discuss the challenges and future application of stimulus-responsive DNA hydrogels.
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Carballo-Pedrares N, Fuentes-Boquete I, Díaz-Prado S, Rey-Rico A. Hydrogel-Based Localized Nonviral Gene Delivery in Regenerative Medicine Approaches-An Overview. Pharmaceutics 2020; 12:E752. [PMID: 32785171 PMCID: PMC7464633 DOI: 10.3390/pharmaceutics12080752] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 07/29/2020] [Accepted: 08/07/2020] [Indexed: 12/11/2022] Open
Abstract
Hydrogel-based nonviral gene delivery constitutes a powerful strategy in various regenerative medicine scenarios, as those concerning the treatment of musculoskeletal, cardiovascular, or neural tissues disorders as well as wound healing. By a minimally invasive administration, these systems can provide a spatially and temporarily defined supply of specific gene sequences into the target tissue cells that are overexpressing or silencing the original gene, which can promote natural repairing mechanisms to achieve the desired effect. In the present work, we provide an overview of the most avant-garde approaches using various hydrogels systems for controlled delivery of therapeutic nucleic acid molecules in different regenerative medicine approaches.
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Affiliation(s)
- Natalia Carballo-Pedrares
- Cell Therapy and Regenerative Medicine Unit, Centro de Investigacións Científicas Avanzadas (CICA), Universidade da Coruña, 15071 A Coruña, Spain; (N.C.-P.); (I.F.-B.); (S.D.-P.)
| | - Isaac Fuentes-Boquete
- Cell Therapy and Regenerative Medicine Unit, Centro de Investigacións Científicas Avanzadas (CICA), Universidade da Coruña, 15071 A Coruña, Spain; (N.C.-P.); (I.F.-B.); (S.D.-P.)
- Departamento de Fisioterapia, Medicina y Ciencias Biomédicas, Facultad de Ciencias de la Salud, Universidade da Coruña (UDC), Instituto de Investigación Biomédica de A Coruña (INIBIC), Complexo Hospitalario Universitario de A Coruña (CHUAC), Servizo Galego de Saúde (SERGAS), 15071 A Coruña, Galicia, Spain
| | - Silvia Díaz-Prado
- Cell Therapy and Regenerative Medicine Unit, Centro de Investigacións Científicas Avanzadas (CICA), Universidade da Coruña, 15071 A Coruña, Spain; (N.C.-P.); (I.F.-B.); (S.D.-P.)
- Departamento de Fisioterapia, Medicina y Ciencias Biomédicas, Facultad de Ciencias de la Salud, Universidade da Coruña (UDC), Instituto de Investigación Biomédica de A Coruña (INIBIC), Complexo Hospitalario Universitario de A Coruña (CHUAC), Servizo Galego de Saúde (SERGAS), 15071 A Coruña, Galicia, Spain
| | - Ana Rey-Rico
- Cell Therapy and Regenerative Medicine Unit, Centro de Investigacións Científicas Avanzadas (CICA), Universidade da Coruña, 15071 A Coruña, Spain; (N.C.-P.); (I.F.-B.); (S.D.-P.)
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Hsu W, Csaba N, Alexander C, Garcia‐Fuentes M. Polyphosphazenes for the delivery of biopharmaceuticals. J Appl Polym Sci 2020. [DOI: 10.1002/app.48688] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Wei‐Hsin Hsu
- Center for Research in Molecular Medicine and Chronic Diseases (CiMUS)Universidade de Santiago de Compostela, Santiago de Compostela, Spain
- Division of Molecular Therapeutics and Formulation School of PharmacyUniversity of Nottingham UK
| | - Noemi Csaba
- Center for Research in Molecular Medicine and Chronic Diseases (CiMUS)Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - Cameron Alexander
- Division of Molecular Therapeutics and Formulation School of PharmacyUniversity of Nottingham UK
| | - Marcos Garcia‐Fuentes
- Center for Research in Molecular Medicine and Chronic Diseases (CiMUS)Universidade de Santiago de Compostela, Santiago de Compostela, Spain
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Saravanan S, Vimalraj S, Thanikaivelan P, Banudevi S, Manivasagam G. A review on injectable chitosan/beta glycerophosphate hydrogels for bone tissue regeneration. Int J Biol Macromol 2019; 121:38-54. [DOI: 10.1016/j.ijbiomac.2018.10.014] [Citation(s) in RCA: 104] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 09/20/2018] [Accepted: 10/01/2018] [Indexed: 02/07/2023]
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Recent development of synthetic nonviral systems for sustained gene delivery. Drug Discov Today 2017; 22:1318-1335. [PMID: 28428056 DOI: 10.1016/j.drudis.2017.04.001] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 03/02/2017] [Accepted: 04/05/2017] [Indexed: 12/22/2022]
Abstract
Sustained gene delivery is of particular importance today because it circumvents the need for repeated therapeutic administration and provides spatial and temporal control of the release profile. Better understanding of the genetic basis of diseases and advances in gene therapy have propelled significant research on biocompatible gene carriers for therapeutic purposes. Varied biodegradable polymer-based architectures have been used to create new compositions with unique properties suitable for sustained gene delivery. This review presents the most recent advances in various polymeric systems: hydrogels, microspheres, nanospheres and scaffolds, having complex architectures to encapsulate and deliver functional genes. Through the recombination of different existing polymer systems, the multicomplex systems can be further endowed with new properties for better-targeted biomedical applications.
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Picola IPD, Shi Q, Fernandes JC, Petrônio MS, Lima AMF, de Oliveira Tiera VA, Tiera MJ. Chitosan derivatives for gene transfer: effect of phosphorylcholine and diethylaminoethyl grafts on the in vitro transfection efficiency. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2016; 27:1611-30. [PMID: 27532422 DOI: 10.1080/09205063.2016.1225333] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The purpose of this work was to improve the functional properties of chitosan for gene transfer by inserting phosphorylcholine (PC) and diethylaminoethyl (DEAE) groups into the main chain. A series of derivatives containing increasing contents of DEAE and a fixed content of PC groups were synthesized and characterized, aiming to evaluate the effect of these groups on the nanoparticles' properties and the in vitro transfection efficiency. The derivatives were soluble at physiological pH levels and all derivatives were less cytotoxic than the control, the lipid lipofectamine. The obtained derivatives complexed pDNA into nanoparticles with smaller sizes and higher zeta potentials than plain chitosan. The in vitro transfection was performed with nanoparticles prepared at pH 6.3 and 7.4 and the results showed that nanoparticles prepared with derivatives containing 20% of PC groups (PC18-CH) and high degrees of substitution by DEAE (PC20-CH-DEAE100, CH-DEAE80, CH-DEAE100) displayed the better transfection efficiencies in HeLa cells, reaching relative values comparable to lipofectamine. The most effective derivative, PC18CH, was selected for complexation with siRNA and its complexes demonstrated an in vitro knockdown efficiency highly dependent on the N/P ratio. Our combined results indicated that, by means of controlled modifications, the limitations of chitosan can be overcome to obtain more effective carriers based on chitosan, and the derivatives here studied hold potential for in vivo studies.
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Affiliation(s)
- Isadora Pfeifer Dalla Picola
- a Department of Physics , IBILCE, São Paulo State University - UNESP , São José do Rio Preto , São Paulo , Brazil.,b Orthopedic Research Laboratory , Hôpital du Sacré-Cœur de Montréal, Université de Montréal , Montréal , Canada
| | - Qin Shi
- b Orthopedic Research Laboratory , Hôpital du Sacré-Cœur de Montréal, Université de Montréal , Montréal , Canada
| | - Júlio Cesar Fernandes
- b Orthopedic Research Laboratory , Hôpital du Sacré-Cœur de Montréal, Université de Montréal , Montréal , Canada
| | - Maicon Segalla Petrônio
- c Department of Chemistry and Environmental Sciences , IBILCE, São Paulo State University - UNESP , São José do Rio Preto , São Paulo , Brazil
| | - Aline Margarete Furuyama Lima
- c Department of Chemistry and Environmental Sciences , IBILCE, São Paulo State University - UNESP , São José do Rio Preto , São Paulo , Brazil
| | - Vera Aparecida de Oliveira Tiera
- c Department of Chemistry and Environmental Sciences , IBILCE, São Paulo State University - UNESP , São José do Rio Preto , São Paulo , Brazil
| | - Marcio José Tiera
- c Department of Chemistry and Environmental Sciences , IBILCE, São Paulo State University - UNESP , São José do Rio Preto , São Paulo , Brazil
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Salmasi Z, Shier WT, Hashemi M, Mahdipour E, Parhiz H, Abnous K, Ramezani M. Heterocyclic amine-modified polyethylenimine as gene carriers for transfection of mammalian cells. Eur J Pharm Biopharm 2015. [PMID: 26209125 DOI: 10.1016/j.ejpb.2015.07.008] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Branched polyethylenimine (PEI) is extensively used as a polycationic non-viral vector for gene delivery. Polyplexes formed with PEI are believed to be released from endocytotic vesicles by the osmotic burst mechanism in the rate-limiting step in transfection. Increasing the buffering capacity of PEI derivatives in the endosomal pH range of 4.5-7.5 should enhance transfection efficiency. In this study, PEI was derivatized by covalently attaching heterocyclic amine moieties (piperazine, pyridine and imidazole rings with pKa values from 5.23 to 6.04) through amide bonds. PEI derivatives with 50% of the primary amines on PEI exhibited increased buffering capacity, increased transfection activity and decreased cytotoxicity in murine neuroblastoma (Neuro-2a) cells. The relative effectiveness in enhancing transfection efficiency was piperazine>pyridine>histidine, but each type of amine was the most effective under a particular set of conditions. Modified vectors could significantly improve transfection efficiency in murine mesenchymal stem cells. PEI25 derivatized at 50% with histidine administered as polyplexes in the tail veins of mice resulted in remarkably enhanced luciferase gene expression in the expected organ distribution and much lower toxicity than underivatized PEI25.
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Affiliation(s)
- Zahra Salmasi
- Pharmaceutical Research Center, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, P.O. Box 91775-1365, Iran
| | - Wayne Thomas Shier
- Department of Medicinal Chemistry, University of Minnesota-Twin Cities, Minneapolis, MN 55455, USA
| | - Maryam Hashemi
- Nanotechnology Research Center, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, P.O. Box 91775-1365, Iran
| | - Elahe Mahdipour
- Department of Medical Biotechnology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, P.O. Box 917794-8564, Iran
| | - Hamideh Parhiz
- Pharmaceutical Research Center, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, P.O. Box 91775-1365, Iran
| | - Khalil Abnous
- Pharmaceutical Research Center, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, P.O. Box 91775-1365, Iran.
| | - Mohammad Ramezani
- Pharmaceutical Research Center, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, P.O. Box 91775-1365, Iran.
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Dai S. Natural Cationic Polymers for Advanced Gene and Drug Delivery. CATIONIC POLYMERS IN REGENERATIVE MEDICINE 2014. [DOI: 10.1039/9781782620105-00557] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Gene and drug delivery is becoming more and more important in the treatment of complicated human diseases. Proper gene/drug delivery systems can effectively enhance therapeutic efficiency and minimize various side-effects. To date, a variety of delivery systems have been developed. Different from synthetic materials, natural polymers are abundant in nature, renewable, non-toxic, biocompatible and biodegradable. Owing to the presence of positive charges, natural cationic polymers have found important applications in many biological fields, such as drug/gene delivery and tissue engineering. In gene delivery, natural cationic polymers can condense nucleic acids, protect them from degradation, lower the immunogenicity and improve overall transfection efficiency. In drug delivery, cationic functional groups can alter the amphiphilic properties of the polymers to ensure their suitable applications for delivering hydrophobic or protein drugs. After simple chemical modification, the derivatives of natural cationic polymers show improved performance as functional delivery carriers. In this chapter, details on the chemical modification of natural cationic polymers and their applications in gene/drug delivery is discussed.
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Affiliation(s)
- Sheng Dai
- School of Chemical Engineering, University of Adelaide Australia
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Villa R, Cerroni B, Viganò L, Margheritelli S, Abolafio G, Oddo L, Paradossi G, Zaffaroni N. Targeted doxorubicin delivery by chitosan-galactosylated modified polymer microbubbles to hepatocarcinoma cells. Colloids Surf B Biointerfaces 2013; 110:434-42. [PMID: 23759384 DOI: 10.1016/j.colsurfb.2013.04.022] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2012] [Revised: 04/18/2013] [Accepted: 04/22/2013] [Indexed: 10/26/2022]
Abstract
Targeted drug delivery is a main issue in cancer treatment. Taking advantage of recently developed polyvinyl alcohol (PVA)-based microbubbles, which are characterized by chemical versatility of the polymeric surface thereby allowing coating with different ligands, we set up a strategy for the targeted delivery of the anticancer agent doxorubicin to hepatocarcinoma cells. Such microbubbles are exceptionally efficient ultrasound scatterers and thus represent also an option as potential ultrasound contrast agents. Moreover, the oscillation of microbubbles induced by ultrasound could contribute to favor the release of drugs allocated on shell. Specifically, PVA-based microbubbles were reacted with a galactosylated chitosan complex and loaded with doxorubicin to enable the localization and drug delivery to HepG2 hepatocarcinoma cells overexpressing asialoglycoprotein receptors. We demonstrated selectivity and greater bioadhesive properties of the functionalized microbubbles for tumor cells than to normal fibroblasts, which were influenced by the degree of galactosylation. The presence of galactosylated chitosan did not modify the rate of doxorubicin release from microbubbles, whichwas almost complete within 48h. Cellular uptake of doxorubicin loaded on functionalized microbubbles was higher in HepG2 than in normal fibroblasts, which do not over express the asialoglycoprotein receptors. In addition, doxorubicin loaded onto functionalized microbubbles fully retained its cytotoxic activity. Cells were also irradiated with ultrasound, immediately after exposure to microbubbles. An early enhancement of doxorubicin release and cellular drug uptake associated to a concomitant increase in cytotoxicity was observed in HepG2 cells. Overall, results of the study indicate that galactosylated chitosan microbubbles represent promising devices for the targeted delivery of antitumor agents to liver cancer cells.
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Affiliation(s)
- Raffaella Villa
- Dipartimento di Oncologia Sperimentale e Medicina Molecolare, Fondazione IRCCS Istituto Nazionale dei Tumori, Via Amadeo 42, 20133 Milano, Italy.
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Muthiah M, Park IK, Cho CS. Surface modification of iron oxide nanoparticles by biocompatible polymers for tissue imaging and targeting. Biotechnol Adv 2013; 31:1224-36. [PMID: 23528431 DOI: 10.1016/j.biotechadv.2013.03.005] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Revised: 02/19/2013] [Accepted: 03/11/2013] [Indexed: 11/25/2022]
Abstract
Superparamagnetic iron oxide nanoparticles (SPIONs) are excellent MR contrast agents when coated with biocompatible polymers such as hydrophilic synthetic polymers, proteins, polysaccharides, and lipids, which improve their stability and biocompatibility and reduce their aggregation. Various biocompatible materials, coated or conjugated with targeting moieties such as galactose, mannose, folic acid, antibodies and RGD, have been applied to SPION surfaces to provide tissue specificity to hepatocytes, macrophages, and tumor regions in order to reduce non-specific uptake and improve biocompatibility. This review discusses the recent progress in the development of biocompatible and hydrophilic polymers for improving stability of SPIONs and describes the carbohydrates based biocompatible materials that are providing SPIONs with cell/tissue specificity as ligands.
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Affiliation(s)
- Muthunarayanan Muthiah
- Department of Biomedical Sciences and Center for Biomedical Human Resources (BK-21 project), Chonnam National University Medical School, Gwangju 501-757, South Korea; Clinical Vaccine R&D Center, Chonnam National University Hwasun Hospital, Jeonnam 519-763, South Korea
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13
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Seo BB, Park MR, Chun C, Lee JY, Song SC. The biological efficiency and bioavailability of human growth hormone delivered using injectable, ionic, thermosensitive poly(organophosphazene)-polyethylenimine conjugate hydrogels. Biomaterials 2011; 32:8271-80. [PMID: 21839508 DOI: 10.1016/j.biomaterials.2011.07.033] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2011] [Accepted: 07/11/2011] [Indexed: 11/24/2022]
Abstract
We have endeavored to develop injectable, thermosensitive, biodegradable hydrogels that prolong human growth hormone (hGH) release, improving bioavailability through introducing balanced ionic interactions. Cationic poly(organophosphazene)-polyethylenimine (PEI, 1.8 kDa) conjugate hydrogels were synthesized as those hydrogels for sustained delivery of anionic hGH with proper ionic strength of association/dissociation. We have additionally prepared different chain lengths of α-amino-ω-methoxy-poly(ethylene glycol) (AMPEG550 and AMPEG750) for the synthesis of conjugates as a means to control hydrogel degradation rates. All Aqueous solutions of PEI-conjugates became hydrogels hydrolyzable in proportion to AMPEG molecular weight at body temperature; these PEI-conjugates complexed with hGH and extended hGH release in vitro. In pharmacokinetic studies of hGH behavior in SD rats, hydrogels of PEI-conjugate/hGH complexes could suppress the initial burst-phase, and extend the duration, of release, as well as increasing of area under the curve (AUC) compared to controls including hGH solution or non-ionic hydrogel. In a hypophysectomized rat model, the biological efficacy of hGH delivered from PEI-conjugate/hGH complex hydrogels was equivalent to that from daily administration over four days based on body weight gain and width of the tibial growth plate. These results suggest that ionic, thermosensitive, poly(organophosphazene)-PEI-conjugate hydrogel demonstrates potential as an injectable depot for sustained delivery of bioavailable hGH.
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Affiliation(s)
- Bo-Bae Seo
- Research Institute for Basic Sciences and Department of Chemistry, College of Sciences, Kyung Hee University, Seoul 130-701, Republic of Korea
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Cheng M, Li Q, Wan T, Hong X, Chen H, He B, Cheng Z, Xu H, Ye T, Zha B, Wu J, Zhou R. Synthesis and efficient hepatocyte targeting of galactosylated chitosan as a gene carrier in vitro and in vivo. J Biomed Mater Res B Appl Biomater 2011; 99:70-80. [PMID: 21656667 DOI: 10.1002/jbm.b.31873] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2010] [Revised: 04/02/2011] [Accepted: 04/10/2011] [Indexed: 12/11/2022]
Abstract
While chitosan (CS) has been researched widely as a non-viral vector, its usefulness has been limited by its low cell specificity and transfection efficiency. Therefore, we successfully synthesized galactosylated chitosan (GC) and complexed it with an enhanced green fluorescent protein plasmid (pIRES-EGFP) for transfection into cultured H22 cells (murine hepatic cancer cell line) using various GC/EGFP (N/P) charge ratios. Maximal gene transfection rates detected by flow cytometry occurred at an N/P ratio 5:1. Compared with those of lipofectin/EGFP and naked pIRES-EGFP, GC/EGFP complexes show a very efficient cell-selective transfection to hepatocytes. The MTT assay detected relatively low cytotoxicity in cells transfected with GC. A recombinant plasmid granulocyte-macrophage colony-stimulating factor (GM-SCF) and interleukin (IL) 21 (pIRES/GM-CSF-IL21) was successfully constructed and GC/GM-CSF-IL21 nanoparticles (average diameter, 82.1 nm) were administered via the tail vein of mice with liver metastasis of colon cancer model, for 5 consecutive days. The GC/GM-CSF-IL21 nanoparticles exhibited hepatocyte and passive tumor specificity, increased therapeutic efficacy compared to control groups, promoted leukocytes to aggregate in tumor tissues, and activated the cytotoxicity of natural killer (NK) cells and cytolytic T lymphocyte (CTL). Our results indicate that GC can be used in gene therapy to improve transfection efficiency and can be used as an immunological stimulant in vivo.
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Affiliation(s)
- Mingrong Cheng
- Department of General Surgery, Shanghai Fifth People's Hospital, Fudan University, Shanghai, China.
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Chitosan and Its Derivatives for Drug Delivery Perspective. ADVANCES IN POLYMER SCIENCE 2011. [DOI: 10.1007/12_2011_117] [Citation(s) in RCA: 147] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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16
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Oh YK. This month in APR. Hepatocyte-targeting and sustained gene delivery. Arch Pharm Res 2010; 33:497-8. [PMID: 20422355 DOI: 10.1007/s12272-010-0400-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yu-Kyoung Oh
- College of Pharmacy, Seoul National University, Seoul 151-742, South Korea. ohyk@ snu.ac.kr
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