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Glaive AS, Cœur CL, Guigner JM, Amiel C, Volet G. Amphiphilic Heterograft Copolymers Bearing Biocompatible/Biodegradable Grafts. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:2050-2063. [PMID: 38243903 DOI: 10.1021/acs.langmuir.3c02772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2024]
Abstract
The amphiphilic heterograft copolymers bearing biocompatible/biodegradable grafts [poly(2-methyl-2-oxazoline-co-2-pentyl-2-oxazoline)-g-poly(d-l-lactic acid)/poly(2-ethyl-2-oxazoline)] were synthesized successfully by the combination of cationic ring-opening polymerization and click chemistry via the ⟨"grafting to"⟩ approach. The challenge of this synthesis was to graft together hydrophobic and hydrophilic chains on a hydrophilic platform based on PMeOx. The efficiency of grafting depends on the chemical nature of the grafts and of the length of the macromolecular chains. The self-assembly of these polymers in aqueous media was investigated by DLS, cryo-TEM, and SANS. The results demonstrated that different morphologies were obtained from nanospheres and vesicles to filaments depending on the hydrophilic weight ratio in the heterograft copolymer varying from 0.38 until 0.84. As poly(2-ethyl-2-oxazoline) is known to be thermoresponsive, the influence of temperature rise on the nanoassembly stability was studied in water and in a physiological medium. SANS and DLS measurements during a temperature ramp allowed to show that nanoassemblies start to self-assemble in "raspberry like" primary structures at 50 °C, and these structures grow and get denser as the temperature is increased further. These amphiphilic heterograft copolymers may include hydrophobic drugs and should find important applications for biomedical applications which require stealth properties.
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Affiliation(s)
- Aline-Sarah Glaive
- Univ Paris Est Creteil, CNRS, ICMPE, UMR 7182, 2 rue Henri Dunant, Thiais 94320, France
| | - Clémence Le Cœur
- Univ Paris Est Creteil, CNRS, ICMPE, UMR 7182, 2 rue Henri Dunant, Thiais 94320, France
- Laboratoire Léon Brillouin, Université Paris-Saclay, CEA-CNRS UMR CEA Saclay, Gif sur Yvette 91191, France
| | - Jean-Michel Guigner
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne Université, IRD, CNRS UMR7590, MNHN; 4 place Jussieu, Paris 75252, France
| | - Catherine Amiel
- Univ Paris Est Creteil, CNRS, ICMPE, UMR 7182, 2 rue Henri Dunant, Thiais 94320, France
| | - Gisèle Volet
- Univ Paris Est Creteil, CNRS, ICMPE, UMR 7182, 2 rue Henri Dunant, Thiais 94320, France
- Université d'Evry Val d'Essonne, Rue du Père Jarlan, Evry cedex 91025, France
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Garkal A, Bangar P, Rajput A, Pingale P, Dhas N, Sami A, Mathur K, Joshi S, Dhuri S, Parikh D, Mutalik S, Mehta T. Long-acting formulation strategies for protein and peptide delivery in the treatment of PSED. J Control Release 2022; 350:538-568. [PMID: 36030993 DOI: 10.1016/j.jconrel.2022.08.040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 08/18/2022] [Accepted: 08/21/2022] [Indexed: 12/17/2022]
Abstract
The invigoration of protein and peptides in serious eye disease includes age-related macular degeneration, choroidal neovascularization, retinal neovascularization, and diabetic retinopathy. The transportation of macromolecules like aptamers, recombinant proteins, and monoclonal antibodies to the posterior segment of the eye is challenging due to their high molecular weight, rapid degradation, and low solubility. Moreover, it requires frequent administration for prolonged therapy. The long-acting novel formulation strategies are helpful to overcome these issues and provide superior therapy. It avoids frequent administration, improves stability, high retention time, and avoids burst release. This review briefly enlightens posterior segments of eye diseases with their diagnosis techniques and treatments. This article mainly focuses on recent advanced approaches like intravitreal implants and injectables, electrospun injectables, 3D printed drug-loaded implants, nanostructure thin-film polymer devices encapsulated cell technology-based intravitreal implants, injectable and depots, microneedles, PDS with ranibizumab, polymer nanoparticles, inorganic nanoparticles, hydrogels and microparticles for delivering macromolecules in the eye for intended therapy. Furthermore, novel techniques like aptamer, small Interference RNA, and stem cell therapy were also discussed. It is predicted that these systems will make revolutionary changes in treating posterior segment eye diseases in future.
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Affiliation(s)
- Atul Garkal
- Department of Pharmaceutics, Institute of Pharmacy, Nirma University, Ahmedabad, Gujarat 382481, India
| | - Priyanka Bangar
- Department of Pharmaceutics, Institute of Pharmacy, Nirma University, Ahmedabad, Gujarat 382481, India
| | - Amarjitsing Rajput
- Department of Pharmaceutics, Bharti Vidyapeeth Deemed University, Poona College of Pharmacy, Pune, Maharashtra 411038, India
| | - Prashant Pingale
- Department of Pharmaceutics, GES's Sir Dr. M.S. Gosavi College of Pharmaceutical Education and Research, Nashik, Maharashtra 422005, India
| | - Namdev Dhas
- Department of Pharmaceutics, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education (MAHE), Manipal, Karnataka 576104, India
| | - Anam Sami
- Department of Pharmaceutics, Institute of Pharmacy, Nirma University, Ahmedabad, Gujarat 382481, India
| | - Khushboo Mathur
- Department of Pharmaceutics, Institute of Pharmacy, Nirma University, Ahmedabad, Gujarat 382481, India
| | - Shubham Joshi
- Department of Pharmaceutics, Institute of Pharmacy, Nirma University, Ahmedabad, Gujarat 382481, India
| | - Sonika Dhuri
- Department of Pharmaceutics, Institute of Pharmacy, Nirma University, Ahmedabad, Gujarat 382481, India
| | - Dhaivat Parikh
- Department of Pharmaceutics, Institute of Pharmacy, Nirma University, Ahmedabad, Gujarat 382481, India
| | - Srinivas Mutalik
- Department of Pharmaceutics, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education (MAHE), Manipal, Karnataka 576104, India
| | - Tejal Mehta
- Department of Pharmaceutics, Institute of Pharmacy, Nirma University, Ahmedabad, Gujarat 382481, India.
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Mantler T, Jackson KT, Walsh EJ, Tobah S, Shillington K, Jackson B, Soares E. Sharing Personal Experiences of Accessibility and Knowledge of Violence: A Qualitative Study. JOURNAL OF INTERPERSONAL VIOLENCE 2022; 37:1206-1222. [PMID: 32456529 DOI: 10.1177/0886260520920867] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In North America, the most common societal response to intimate partner violence (IPV) has been the establishment of women's shelters for temporary housing and security. Rurality further compounds the challenges women experiencing IPV face, with unique barriers from their urban counterparts. This study sought to explore the intersection of rural women's health care experiences within the context of IPV. Eight rural women living in Southwestern Ontario, who had experienced IPV, had used women's shelter services, and who had accessed health care services in the preceding 6 months were interviewed. Using a feminist, intersectional lens, we collected and analyzed qualitative data using an interpretive description approach. Findings demonstrated that women were able to identify strengths and opportunities from their experiences, but significant challenges also exist for rural women seeking health care who experience IPV. Our findings underscore the need for filling of policy gaps between health care and the services women use. We propose that further research is needed on alternative, integrated models of shelter services that address health care needs for women experiencing IPV.
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Thermosensitive Poloxamer- graft-Carboxymethyl Pullulan: A Potential Injectable Hydrogel for Drug Delivery. Polymers (Basel) 2021; 13:polym13183025. [PMID: 34577926 PMCID: PMC8466796 DOI: 10.3390/polym13183025] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 08/26/2021] [Accepted: 09/03/2021] [Indexed: 02/07/2023] Open
Abstract
A thermosensitive copolymer composed of amphiphilic triblock copolymer, poloxamer 407, grafted on hydrophilic pullulan with pendant carboxymethyl groups (CMP) was prepared and characterized. The structure of the new copolymer was assessed by Fourier transform infrared (FT-IR) and 1H nuclear magnetic resonance (1H NMR) spectroscopy. The content of the poloxamer in the grafted copolymer was 83.8% (w/w). The effect of the copolymer concentration on the gelation behavior was analyzed by the vertical method and rheological tests; the gel phase of the copolymer occurred at a lower concentration (11%, w/v) as compared with poloxamer (18%, w/v). The starting gelation time under the simulated physiological conditions (phosphate buffer with a pH of 7.4, at 37 °C) was sensitive on the rest temperature before the test, this being 990 s and 280 s after 24 h rest at 4 °C and 20 °C, respectively. The rheological tests evidenced a high elasticity and excellent ability of the copolymer to recover the initial structure after the removal of the applied force or external stimuli. Moreover, the hydrogel has proved a sustained release of amoxicillin (taken as a model drug) over 168 h. Taken together, the results clearly indicate that this copolymer can be used as an injectable hydrogel.
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Zarrintaj P, Ramsey JD, Samadi A, Atoufi Z, Yazdi MK, Ganjali MR, Amirabad LM, Zangene E, Farokhi M, Formela K, Saeb MR, Mozafari M, Thomas S. Poloxamer: A versatile tri-block copolymer for biomedical applications. Acta Biomater 2020; 110:37-67. [PMID: 32417265 DOI: 10.1016/j.actbio.2020.04.028] [Citation(s) in RCA: 140] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 04/11/2020] [Accepted: 04/14/2020] [Indexed: 11/16/2022]
Abstract
Poloxamers, also called Pluronic, belong to a unique class of synthetic tri-block copolymers containing central hydrophobic chains of poly(propylene oxide) sandwiched between two hydrophilic chains of poly(ethylene oxide). Some chemical characteristics of poloxamers such as temperature-dependent self-assembly and thermo-reversible behavior along with biocompatibility and physiochemical properties make poloxamer-based biomaterials promising candidates for biomedical application such as tissue engineering and drug delivery. The microstructure, bioactivity, and mechanical properties of poloxamers can be tailored to mimic the behavior of various types of tissues. Moreover, their amphiphilic nature and the potential to self-assemble into the micelles make them promising drug carriers with the ability to improve the drug availability to make cancer cells more vulnerable to drugs. Poloxamers are also used for the modification of hydrophobic tissue-engineered constructs. This article collects the recent advances in design and application of poloxamer-based biomaterials in tissue engineering, drug/gene delivery, theranostic devices, and bioinks for 3D printing. STATEMENT OF SIGNIFICANCE: Poloxamers, also called Pluronic, belong to a unique class of synthetic tri-block copolymers containing central hydrophobic chains of poly(propylene oxide) sandwiched between two hydrophilic chains of poly(ethylene oxide). The microstructure, bioactivity, and mechanical properties of poloxamers can be tailored to mimic the behavior of various types of tissues. Moreover, their amphiphilic nature and the potential to self-assemble into the micelles make them promising drug carriers with the ability to improve the drug availability to make cancer cells more vulnerable to drugs. However, no reports have systematically reviewed the critical role of poloxamer for biomedical applications. Research on poloxamers is growing today opening new scenarios that expand the potential of these biomaterials from "traditional" treatments to a new era of tissue engineering. To the best of our knowledge, this is the first review article in which such issue is systematically reviewed and critically discussed in the light of the existing literature.
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Affiliation(s)
- Payam Zarrintaj
- Chemical Engineering, Oklahoma State University, 420 Engineering North, Stillwater, OK 74078, United States
| | - Joshua D Ramsey
- Chemical Engineering, Oklahoma State University, 420 Engineering North, Stillwater, OK 74078, United States
| | - Ali Samadi
- Polymer Engineering Department, Faculty of Engineering, Urmia University, Urmia, Iran
| | - Zhaleh Atoufi
- School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
| | - Mohsen Khodadadi Yazdi
- School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
| | - Mohammad Reza Ganjali
- Center of Excellence in Electrochemistry, School of Chemistry, College of Science, University of Tehran, Tehran, Iran; Biosensor Research Center, Endocrinology & Metabolism Molecular-Cellular Sciences, University of Tehran, Tehran, Iran
| | | | - Ehsan Zangene
- Department of Bioinformatics, Institute of Biochemistry and Biophysics (IBB), University of Tehran, Tehran, Iran
| | - Mehdi Farokhi
- National Cell Bank of Iran, Pasteur Institute of Iran, P.O. Box 1316943551, Tehran, Iran
| | - Krzysztof Formela
- Department of Polymer Technology, Faculty of Chemistry, Gdansk University of Technology, Gdansk, Poland
| | - Mohammad Reza Saeb
- Department of Resin and Additives, Institute for Color Science and Technology, Tehran, Iran.
| | - Masoud Mozafari
- Department of Tissue Engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran.
| | - Sabu Thomas
- School of Chemical Sciences, M G University, Kottayam 686560, Kerala, India
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Hu X, Li R, Wu Y, Li Y, Zhong X, Zhang G, Kang Y, Liu S, Xie L, Ye J, Xiao J. Thermosensitive heparin-poloxamer hydrogel encapsulated bFGF and NGF to treat spinal cord injury. J Cell Mol Med 2020; 24:8166-8178. [PMID: 32515141 PMCID: PMC7348165 DOI: 10.1111/jcmm.15478] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 04/18/2020] [Accepted: 05/24/2020] [Indexed: 01/10/2023] Open
Abstract
The application of growth factors (GFs) for treating chronic spinal cord injury (SCI) has been shown to promote axonal regeneration and functional recovery. However, direct administration of GFs is limited by their rapid degradation and dilution at the injured sites. Moreover, SCI recovery is a multifactorial process that requires multiple GFs to participate in tissue regeneration. Based on these facts, controlled delivery of multiple growth factors (GFs) to lesion areas is becoming an attractive strategy for repairing SCI. Presently, we developed a GFs‐based delivery system (called GFs‐HP) that consisted of basic fibroblast growth factor (bFGF), nerve growth factor (NGF) and heparin‐poloxamer (HP) hydrogel through self‐assembly mode. This GFs‐HP was a kind of thermosensitive hydrogel that was suitable for orthotopic administration in vivo. Meanwhile, a 3D porous structure of this hydrogel is commonly used to load large amounts of GFs. After single injection of GFs‐HP into the lesioned spinal cord, the sustained release of NGF and bFGF from HP could significantly improve neuronal survival, axon regeneration, reactive astrogliosis suppression and locomotor recovery, when compared with the treatment of free GFs or HP. Moreover, we also revealed that these neuroprotective and neuroregenerative effects of GFs‐HP were likely through activating the phosphatidylinositol 3 kinase and protein kinase B (PI3K/Akt) and mitogen‐activated protein kinase/extracellular signal‐regulated kinase (MAPK/ERK) signalling pathways. Overall, our work will provide an effective therapeutic strategy for SCI repair.
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Affiliation(s)
- Xiaoli Hu
- Department of Anesthesia, The First Affiliated Hospital, Gannan Medical University, Ganzhou, China.,Molecular Pharmacology Research Center, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, China
| | - Rui Li
- Department of Anesthesia, The First Affiliated Hospital, Gannan Medical University, Ganzhou, China.,Molecular Pharmacology Research Center, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, China.,School of Chemistry, Sun Yat-sen University, Guangzhou, China
| | - Yanqing Wu
- The Institute of Life Sciences, Engineering Laboratory of Zhejiang Province for Pharmaceutical Development of Growth Factors, Biomedical Collaborative Innovation Center of Wenzhou, Wenzhou University, Wenzhou, China
| | - Yi Li
- Department of Anesthesia, The First Affiliated Hospital, Gannan Medical University, Ganzhou, China
| | - Xingfeng Zhong
- Department of Anesthesia, Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Guanyinsheng Zhang
- Department of Anesthesia, The First Affiliated Hospital, Gannan Medical University, Ganzhou, China
| | - Yanmin Kang
- Department of Anesthesia, The First Affiliated Hospital, Gannan Medical University, Ganzhou, China
| | - Shuhua Liu
- Department of Anesthesia, The First Affiliated Hospital, Gannan Medical University, Ganzhou, China
| | - Ling Xie
- Molecular Pharmacology Research Center, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, China
| | - Junming Ye
- Department of Anesthesia, The First Affiliated Hospital, Gannan Medical University, Ganzhou, China
| | - Jian Xiao
- Molecular Pharmacology Research Center, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, China.,The Institute of Life Sciences, Engineering Laboratory of Zhejiang Province for Pharmaceutical Development of Growth Factors, Biomedical Collaborative Innovation Center of Wenzhou, Wenzhou University, Wenzhou, China
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7
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Zhang SS, Xu XX, Xiang WW, Zhang HH, Lin HL, Shen LE, Lin Q, Lin F, Zhou ZY. Using 17β-estradiol heparin-poloxamer thermosensitive hydrogel to enhance the endometrial regeneration and functional recovery of intrauterine adhesions in a rat model. FASEB J 2019; 34:446-457. [PMID: 31914682 DOI: 10.1096/fj.201901603rr] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 10/13/2019] [Accepted: 10/21/2019] [Indexed: 12/14/2022]
Abstract
Mechanical damage or infection to the endometrium can lead to the formation of adhesions in the uterine cavity, which may result in reduced reproductive outcome and/or pregnancy complications. The prognosis of this disease is poor due to few effective treatments and the complex environment of endometrium. Heparin-Poloxamer Hydrogel (HP hydrogel) is a nontoxic and biodegradable biomaterial, which has been commonly used as a sustained-release delivery system. In this study, we applied a mini-endometrial curette to scrape the endometrium of rats to mimic the process of curettage in patients. After the establishment of IUA model in rats, we injected the thermo-sensitive hydrogel(E2-HP hydrogel) into the injured uterine cavity and evaluated the therapeutic effect of E2-HP hydrogel on the recovery of IUA. Our results showed that E2-HP hydrogel can significantly facilitate the regeneration of injured endometrium along with inhibiting the cell apoptosis in IUA model. Furthermore, we revealed that E2-HP hydrogel on the recovery of IUA was closely associated with the upregulation of kisspeptin through activating the ERK1/2 and MAPKs p38 pathways. In conclusion, E2-HP hydrogel can effectively transfer E2 into the injured endometrium and it can be considered as a promising therapeutic method for the women with intrauterine adhesions.
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Affiliation(s)
- Si-Si Zhang
- Department of Gynaecology, The First Affiliated Hospital, Wenzhou Medical University, Wenzhou, China
| | - Xin-Xin Xu
- Department of Gynaecology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Wei-Wei Xiang
- Department of Neurology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hui-Heng Zhang
- School of the Second Clinical Medical Science, Wenzhou Medical University, Wenzhou, China
| | - Hui-Long Lin
- Department of Gynaecology, The First Affiliated Hospital, Wenzhou Medical University, Wenzhou, China
| | - Lai-En Shen
- Department of Gynaecology, The First Affiliated Hospital, Wenzhou Medical University, Wenzhou, China
| | - Qi Lin
- Department of Gynaecology, The First Affiliated Hospital, Wenzhou Medical University, Wenzhou, China
| | - Feng Lin
- Department of Gynaecology, The First Affiliated Hospital, Wenzhou Medical University, Wenzhou, China
| | - Zhi-Yang Zhou
- Department of Gynaecology, The First Affiliated Hospital, Wenzhou Medical University, Wenzhou, China.,International Peace Maternal and Child Health Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Shanghai Key Laboratory of Embryo Original Disease, Shanghai, China
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Lin D, Lei L, Shi S, Li X. Stimulus‐Responsive Hydrogel for Ophthalmic Drug Delivery. Macromol Biosci 2019; 19:e1900001. [DOI: 10.1002/mabi.201900001] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2019] [Revised: 03/29/2019] [Indexed: 02/06/2023]
Affiliation(s)
- Deqing Lin
- Institute of Biomedical EngineeringSchool of Ophthalmology and Optometry and Eye HospitalWenzhou Medical University 270 Xueyuan Road Wenzhou 325027 P. R. China
| | - Lei Lei
- Institute of Biomedical EngineeringSchool of Ophthalmology and Optometry and Eye HospitalWenzhou Medical University 270 Xueyuan Road Wenzhou 325027 P. R. China
| | - Shuai Shi
- Institute of Biomedical EngineeringSchool of Ophthalmology and Optometry and Eye HospitalWenzhou Medical University 270 Xueyuan Road Wenzhou 325027 P. R. China
| | - Xingyi Li
- Institute of Biomedical EngineeringSchool of Ophthalmology and Optometry and Eye HospitalWenzhou Medical University 270 Xueyuan Road Wenzhou 325027 P. R. China
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Wang K, Han Z. Injectable hydrogels for ophthalmic applications. J Control Release 2017; 268:212-224. [PMID: 29061512 PMCID: PMC5722685 DOI: 10.1016/j.jconrel.2017.10.031] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 10/18/2017] [Accepted: 10/19/2017] [Indexed: 12/28/2022]
Abstract
The demand for effective eye therapies is driving the development of injectable hydrogels as new medical devices for controlled delivery and filling purposes. This article introduces the properties of injectable hydrogels and summarizes their versatile application in the treatment of ophthalmic diseases, including age-related macular degeneration, cataracts, diabetic retinopathy, glaucoma, and intraocular cancers. A number of injectable hydrogels are approved by FDA as surgery sealants, tissue adhesives, and are now being investigated as a vitreous humor substitute. Research on hydrogels for drug, factor, nanoparticle, and stem cell delivery is still under pre-clinical investigation or in clinical trials. Although substantial progress has been achieved using injectable hydrogels, some challenging issues must still be overcome before they can be effectively used in medical practice.
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Affiliation(s)
- Kai Wang
- Department of Ophthalmology, University of North Carolina, Chapel Hill, NC 27599, USA
| | - Zongchao Han
- Department of Ophthalmology, University of North Carolina, Chapel Hill, NC 27599, USA; Carolina Institute for Nano Medicine, University of North Carolina, Chapel Hill, NC 27599, USA; Division of Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599, USA.
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10
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Effects of Liposomes Contained in Thermosensitive Hydrogels as Biomaterials Useful in Neural Tissue Engineering. MATERIALS 2017; 10:ma10101122. [PMID: 28937646 PMCID: PMC5666928 DOI: 10.3390/ma10101122] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2017] [Revised: 09/16/2017] [Accepted: 09/20/2017] [Indexed: 12/20/2022]
Abstract
Advances in the generation of suitable thermosensitive hydrogels for the delivery of cells in neural tissue engineering demonstrate a delicate relationship between physical properties and capabilities to promote cell proliferation and differentiation. To improve the properties of these materials, it is possible to add liposomes for the controlled release of bioactive elements, which in turn can affect the physical and biological properties of the hydrogels. In the present investigation, different hydrogels based on Pluronic F127 have been formulated with the incorporation of chitosan and two types of liposomes of two different sizes. The rheological and thermal properties and their relation with the neurite proliferation and growth of the PC12 cell line were evaluated. Our results show that the incorporation of liposomes modifies the properties of the hydrogels dependent on the concentration of chitosan and the lipid type in the liposomes, which directly affect the capabilities of the hydrogels to promote the viability and differentiation of PC12 cells.
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Xu HL, Xu J, Shen BX, Zhang SS, Jin BH, Zhu QY, ZhuGe DL, Wu XQ, Xiao J, Zhao YZ. Dual Regulations of Thermosensitive Heparin-Poloxamer Hydrogel Using ε-Polylysine: Bioadhesivity and Controlled KGF Release for Enhancing Wound Healing of Endometrial Injury. ACS APPLIED MATERIALS & INTERFACES 2017; 9:29580-29594. [PMID: 28809108 DOI: 10.1021/acsami.7b10211] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Hydrogel was not only used as an effective support matrix to prevent intrauterine adhesion after endometrial injury but also served as scaffold to sustain release of some therapeutics, especially growth factor. However, because of the rapid turnover of the endometrial mucus, the poor retention and bad absorption of therapeutic agents in damaged endometrial cavity were two important factors hindering their pharmacologic effect. Herein, a mucoadhesive hydrogel was described by using heparin-modified poloxamer (HP) as the matrix material and ε-polylysine (EPL) as functional excipient. Various EPL-HP hydrogels formulations are screened by rheological evaluation and mucoadhesion studies. It was found that the rheological and mucoadhesive properties of EPL-HP hydrogels were easily controlled by changing the amount of EPL in formulation. The storage modulus of EPL-HP hydrogel with 90 μg/mL of EPL (EPL-HP-90) was elevated to be 1.9 × 105 Pa, in accordance with the adhesion force rising to 3.18 N (10-fold higher than HP hydrogels). Moreover, in vitro release of model drug keratinocyte growth factor (KGF) from EPL-HP hydrogel was significantly accelerated by adding EPL in comparison with HP hydrogel. Both strong mucoadhesive ability and the accelerated drug release behavior for EPL-HP-90 made more of the encapsulated KGF absorbed by the uterus basal layer and endometrial glands after 8 h of administration in uterus cavity. Meanwhile, the morphology of endometrium in the injured uterus was repaired well after 3 d of treatment with KGF-EPL-HP-90 hydrogels. Compared with KGF-HP group, not only proliferation of endometrial epithelial cell and glands but also angiogenesis in the regenerated endometrium was obviously enhanced after treatment with KGF-EPL-HP-90 hydrogels. Alternatively, the cellular apoptosis in the damaged endometrium was significantly inhibited after treatment with KGF-EPL-HP-90 hydrogels. Overall, the mucoadhesive EPL-HP hydrogel with a suitable KGF release profile may be a more promising approach than HP hydrogel alone to repair the injured endometrium.
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Affiliation(s)
- He-Lin Xu
- Department of Pharmaceutics, School of Pharmaceutical Sciences and ‡First Affiliated Hospital, Wenzhou Medical University , Wenzhou City, Zhejiang Province 325035, China
| | - Jie Xu
- Department of Pharmaceutics, School of Pharmaceutical Sciences and ‡First Affiliated Hospital, Wenzhou Medical University , Wenzhou City, Zhejiang Province 325035, China
| | - Bi-Xin Shen
- Department of Pharmaceutics, School of Pharmaceutical Sciences and ‡First Affiliated Hospital, Wenzhou Medical University , Wenzhou City, Zhejiang Province 325035, China
| | - Si-Si Zhang
- Department of Pharmaceutics, School of Pharmaceutical Sciences and ‡First Affiliated Hospital, Wenzhou Medical University , Wenzhou City, Zhejiang Province 325035, China
| | - Bing-Hui Jin
- Department of Pharmaceutics, School of Pharmaceutical Sciences and ‡First Affiliated Hospital, Wenzhou Medical University , Wenzhou City, Zhejiang Province 325035, China
| | - Qun-Yan Zhu
- Department of Pharmaceutics, School of Pharmaceutical Sciences and ‡First Affiliated Hospital, Wenzhou Medical University , Wenzhou City, Zhejiang Province 325035, China
| | - De-Li ZhuGe
- Department of Pharmaceutics, School of Pharmaceutical Sciences and ‡First Affiliated Hospital, Wenzhou Medical University , Wenzhou City, Zhejiang Province 325035, China
| | - Xue-Qing Wu
- Department of Pharmaceutics, School of Pharmaceutical Sciences and ‡First Affiliated Hospital, Wenzhou Medical University , Wenzhou City, Zhejiang Province 325035, China
| | - Jian Xiao
- Department of Pharmaceutics, School of Pharmaceutical Sciences and ‡First Affiliated Hospital, Wenzhou Medical University , Wenzhou City, Zhejiang Province 325035, China
| | - Ying-Zheng Zhao
- Department of Pharmaceutics, School of Pharmaceutical Sciences and ‡First Affiliated Hospital, Wenzhou Medical University , Wenzhou City, Zhejiang Province 325035, China
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Zhang SS, Xia WT, Xu J, Xu HL, Lu CT, Zhao YZ, Wu XQ. Three-dimensional structure micelles of heparin-poloxamer improve the therapeutic effect of 17β-estradiol on endometrial regeneration for intrauterine adhesions in a rat model. Int J Nanomedicine 2017; 12:5643-5657. [PMID: 28848344 PMCID: PMC5557621 DOI: 10.2147/ijn.s137237] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Intrauterine adhesions (IUA) frequently occur after infectious or mechanical injury to the endometrium, which may lead to infertility and/or pregnancy complications. There are few effective treatments due to the complex function of endometrium and shortage of native materials. 17β-estradiol (E2) is commonly used as an ancillary treatment in IUA patients, but it is limited by its poor solubility in aqueous solutions and low concentrations at the injured sites. In this research, a mini-endometrial curette was used to injure the rat’s endometrium to form an IUA model. 17β-estradiol was encapsulated into the micelles of heparin-poloxamer and a thermosensitive hydrogel (E2-HP hydrogel) was formed. This sustained releasing system was applied to restore the structure and function of the injured uterus. E2-HP hydrogel was constructed and relevant characteristics including gelation temperature and micromorphology were evaluated. Sustained release of 17β-estradiol from HP hydrogel was performed both in vitro and in vivo. Ultrasonography measurement and pathologic characteristics on the IUA rats were performed to evaluate the therapeutic effect of E2-HP hydrogel. Endoplasmic reticulum (ER) stress-related apoptosis was analyzed to explore the possible mechanisms in IUA recovery. E2-HP hydrogel showed a prolonged release of E2 at the targeting region and more effective endometrium regeneration in IUA rats. Significant improvements in both gland numbers and fibrosis area were observed in the E2-HP hydrogel group. We also demonstrated that E2-HP hydrogel in the recovery of IUA was closely related to the suppression of ER stress signals via the activation of downstream signals, PI3K/Akt and ERK1/2. HP hydrogel might be an effective approach to deliver E2 into the injured endometrium. Therapeutic strategies targeting ER stress using E2-HP hydrogel might be a promising solution for the treatment of women with intrauterine adhesions.
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Affiliation(s)
- Si-Si Zhang
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, People's Republic of China
| | - Wei-Ting Xia
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, People's Republic of China
| | - Jie Xu
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou City, Zhejiang, People's Republic of China
| | - He-Lin Xu
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou City, Zhejiang, People's Republic of China
| | - Cui-Tao Lu
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou City, Zhejiang, People's Republic of China
| | - Ying-Zheng Zhao
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou City, Zhejiang, People's Republic of China
| | - Xue-Qing Wu
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, People's Republic of China
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Zhao YZ, Jiang X, Lin Q, Xu HL, Huang YD, Lu CT, Cai J. Thermosensitive heparin-poloxamer hydrogels enhance the effects of GDNF on neuronal circuit remodeling and neuroprotection after spinal cord injury. J Biomed Mater Res A 2017; 105:2816-2829. [PMID: 28593744 DOI: 10.1002/jbm.a.36134] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 05/14/2017] [Accepted: 06/01/2017] [Indexed: 12/22/2022]
Abstract
Traumatic spinal cord injury (SCI) results in paraplegia or quadriplegia, and currently, therapeutic interventions for axonal regeneration after SCI are not clinically available. Animal studies have revealed that glial cell-derived neurotrophic factor (GDNF) plays multiple beneficial roles in neuroprotection, glial scarring remodeling, axon regeneration and remyelination in SCI. However, the poor physicochemical stability of GDNF, as well as its limited ability to cross the blood-spinal cord barrier, hampers the development of GDNF as an effective therapeutic intervention in clinical practice. In this study, a novel temperature-sensitive heparin-poloxamer (HP) hydrogel with high GDNF-binding affinity was developed. HP hydrogels showed a supporting scaffold for GDNF when it was injected into the lesion epicenter after SCI. GDNF-HP by orthotopic injection on lesioned spinal cord promoted the beneficial effects of GDNF on neural stem cell proliferation, reactive astrogliosis inhibition, axonal regeneration or plasticity, neuroprotection against cell apoptosis, and body functional recovery. Most interestingly, GDNF demonstrated a bidirectional regulation of autophagy, which inhibited cell apoptosis at different stages of SCI. Furthermore, the HP hydrogel promoted the inhibition of autophagy-induced apoptosis by GDNF in SCI. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 105A: 2816-2829, 2017.
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Affiliation(s)
- Ying-Zheng Zhao
- The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325000, People's Republic of China.,College of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, 325035, People's Republic of China.,Hainan Medical College, Haikou, Hainan, 570102, People's Republic of China
| | - Xi Jiang
- The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325000, People's Republic of China.,Zhejiang University Mingzhou Hospital, Zhejiang, 315104, People's Republic of China
| | - Qian Lin
- College of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, 325035, People's Republic of China.,Kosair Children's Hospital Research Institute at the Department of Pediatrics, University of Louisville School of Medicine, Louisville, Kentucky, 40202
| | - He-Lin Xu
- College of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, 325035, People's Republic of China
| | - Ya-Dong Huang
- Biopharmaceutical R&D Center of Jinan University, Guangzhou, Guangdong, 510000, People's Republic of China
| | - Cui-Tao Lu
- The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325000, People's Republic of China.,College of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, 325035, People's Republic of China
| | - Jun Cai
- The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325000, People's Republic of China.,Kosair Children's Hospital Research Institute at the Department of Pediatrics, University of Louisville School of Medicine, Louisville, Kentucky, 40202
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The effect of the solvent employed in the synthesis of hydrogels of poly (acrylamide-co-methyl methacrylate) on their structure, properties and possible biomedical applications. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2017.01.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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Thermo-sensitive hydrogels combined with decellularised matrix deliver bFGF for the functional recovery of rats after a spinal cord injury. Sci Rep 2016; 6:38332. [PMID: 27922061 PMCID: PMC5138609 DOI: 10.1038/srep38332] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Accepted: 11/08/2016] [Indexed: 12/19/2022] Open
Abstract
Because of the short half-life, either systemic or local administration of bFGF shows significant drawbacks to spinal injury. In this study, an acellular spinal cord scaffold (ASC) was encapsulated in a thermo-sensitive hydrogel to overcome these limitations. The ASC was firstly prepared from the spinal cord of healthy rats and characterized by scanning electronic microscopy and immunohistochemical staining. bFGF could specifically complex with the ASC scaffold via electrostatic or receptor-mediated interactions. The bFGF-ASC complex was further encapsulated into a heparin modified poloxamer (HP) solution to prepare atemperature-sensitive hydrogel (bFGF-ASC-HP). bFGF release from the ASC-HP hydrogel was more slower than that from the bFGF-ASC complex alone. An in vitro cell survival study showed that the bFGF-ASC-HP hydrogel could more effectively promote the proliferation of PC12 cells than a bFGF solution, with an approximate 50% increase in the cell survival rate within 24 h (P < 0.05). Compared with the bFGF solution, bFGF-ASC-HP hydrogel displayed enhanced inhibition of glial scars and obviously improved the functional recovery of the SCI model rat through regeneration of nerve axons and the differentiation of the neural stem cells. In summary, an ASC-HP hydrogel might be a promising carrier to deliver bFGF to an injured spinal cord.
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Zhao YZ, Jiang X, Xiao J, Lin Q, Yu WZ, Tian FR, Mao KL, Yang W, Wong HL, Lu CT. Using NGF heparin-poloxamer thermosensitive hydrogels to enhance the nerve regeneration for spinal cord injury. Acta Biomater 2016; 29:71-80. [PMID: 26472614 PMCID: PMC7517710 DOI: 10.1016/j.actbio.2015.10.014] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Revised: 09/22/2015] [Accepted: 10/09/2015] [Indexed: 10/22/2022]
Abstract
OBJECTIVE Nerve growth factor (NGF) has potential in spinal cord injury (SCI) therapy, but limited by the poor physicochemical stability and low ability to cross the blood spinal cord barrier. Novel heparin-poloxamer (HP) thermo-sensitive hydrogel was constructed to enhance the NGF regeneration on SCI. METHOD NGF-HP thermo-sensitive hydrogel was prepared and related characteristics including gelation temperature, rheological behavior and micromorphology were measured. Local NGF delivery to the injured spinal cord was achieved by in situ injection in the injured space. The cellular uptake of NGF-HP hydrogel was evaluated with PC12 cells in vitro. Pathologic characteristics and neuron regeneration effects on the SCI rats were studied to evaluate the enhanced therapy of NGF-HP hydrogel. Endoplasmic reticulum (ER) stress-induced apoptosis was analyzed to explore the related mechanism in SCI regeneration. RESULTS NGF-HP hydrogel showed good morphology and stable bioactivity of NGF in vitro. NGF-HP hydrogel combined treatment significantly enhanced the efficiency of NGF cellular uptake (P<0.05) without obvious cytotoxicity. Significant improvements in both neuron functions and tissue morphology on the SCI rats were observed in NGF-HP hydrogel group. Compared with free HP hydrogel and NGF treatment groups, NGF-HP hydrogel group showed significant inhibition on the formation of glial scars in the extreme crushed rat SCI model. The neuroprotective effects of NGF-HP were related to the inhibition of chronic ER stress-induced apoptosis. CONCLUSIONS HP hydrogel combined with orthotopic injection technique might be an effective method to deliver NGF into the injured site, which will provide an effective strategy for SCI regeneration. STATEMENT OF SIGNIFICANCE Spinal cord injury (SCI) is a devastating condition that can lead to sudden loss of sensory and autonomic function. Current treatment includes decompression surgery, injury stabilization, secondary complications prevention and rehabilitation. However, neurological recovery is limited. Nerve growth factor (NGF) has potential in SCI therapy, but limited by the poor physicochemical stability and low ability to cross the blood spinal cord barrier. Hydrogels have good affinity and compatibility to biological tissue. In this study, we developed a novel heparin-poloxamer (HP) thermo-sensitive hydrogel to enhance the spinal cord regeneration of NGF. From SCI rat experiment, HP hydrogel combined with orthotopic injection technique showed best neuroprotective effects among experimental groups. This novel combined technique will provide an effective strategy for SCI regeneration.
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Affiliation(s)
- Ying-Zheng Zhao
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou City, Zhejiang Province 325035, China; The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou City, Zhejiang Province 325035, China; Hainan Medical College, Haikou City, Hainan Province 571000, China
| | - Xi Jiang
- Zhejiang University Mingzhou Hospital, Zhejiang Province 315104, China
| | - Jian Xiao
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou City, Zhejiang Province 325035, China
| | - Qian Lin
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou City, Zhejiang Province 325035, China
| | - Wen-Ze Yu
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou City, Zhejiang Province 325035, China
| | - Fu-Rong Tian
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou City, Zhejiang Province 325035, China
| | - Kai-Li Mao
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou City, Zhejiang Province 325035, China
| | - Wei Yang
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou City, Zhejiang Province 325035, China
| | - Ho Lun Wong
- School of Pharmacy, Temple University, Philadelphia, PA 19140, USA.
| | - Cui-Tao Lu
- The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou City, Zhejiang Province 325035, China; School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou City, Zhejiang Province 325035, China.
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Zhao YZ, Lv HF, Lu CT, Chen LJ, Lin M, Zhang M, Jiang X, Shen XT, Jin RR, Cai J, Tian XQ, Wong HL. Evaluation of a novel thermosensitive heparin-poloxamer hydrogel for improving vascular anastomosis quality and safety in a rabbit model. PLoS One 2013; 8:e73178. [PMID: 24015296 PMCID: PMC3755001 DOI: 10.1371/journal.pone.0073178] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Accepted: 07/17/2013] [Indexed: 01/28/2023] Open
Abstract
Despite progress in the design of advanced surgical techniques, stenosis recurs in a large percentage of vascular anastomosis. In this study, a novel heparin-poloxamer (HP) hydrogel was designed and its effects for improving the quality and safety of vascular anastomosis were studied. HP copolymer was synthesized and its structure was confirmed by Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance spectroscopy (1H-NMR). Hydrogels containing HP were prepared and their important characteristics related to the application in vascular anastomosis including gelation temperature, rheological behaviour and micromorphology were measured. Vascular anastomosis were performed on the right common carotid arteries of rabbits, and the in vivo efficiency and safety of HP hydrogel to achieve vascular anastomosis was verified and compared with Poloxamer 407 hydrogel and the conventional hand-sewn method using Doppler ultrasound, CT angiograms, scanning electron microscopy (SEM) and histological technique. Our results showed that HP copolymer displayed special gel-sol-gel phase transition behavior with increasing temperature from 5 to 60 °C. HP hydrogel prepared from 18 wt% HP solution had a porous sponge-like structure, with gelation temperature at approximately 38 °C and maximum elastic modulus at 10,000 Pa. In animal studies, imaging and histological examination of rabbit common jugular artery confirmed that HP hydrogel group had similar equivalent patency, flow and burst strength as Poloxamer 407 group. Moreover, HP hydrogel was superior to poloxamer 407 hydrogel and hand-sewn method for restoring the functions and epithelial structure of the broken vessel junctions after operation. By combining the advantages of heparin and poloxamer 407, HP hydrogel holds high promise for improving vascular anastomosis quality and safety.
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Affiliation(s)
- Ying-Zheng Zhao
- Wenzhou Medical University, Wenzhou City, Zhejiang Province, China
- College of Medicine, Drexel University, Philadelphia, Pennsylvania, United States of America
| | - Hai-Feng Lv
- Wenzhou Medical University, Wenzhou City, Zhejiang Province, China
| | - Cui-Tao Lu
- Wenzhou Medical University, Wenzhou City, Zhejiang Province, China
- * E-mail: (CTL); (XQT); (HLW)
| | - Li-Juan Chen
- Wenzhou Medical University, Wenzhou City, Zhejiang Province, China
| | - Min Lin
- Wenzhou Medical University, Wenzhou City, Zhejiang Province, China
| | - Ming Zhang
- Wenzhou Medical University, Wenzhou City, Zhejiang Province, China
| | - Xi Jiang
- Wenzhou Medical University, Wenzhou City, Zhejiang Province, China
| | - Xiao-Tong Shen
- Wenzhou Medical University, Wenzhou City, Zhejiang Province, China
| | - Rong-Rong Jin
- Wenzhou Medical University, Wenzhou City, Zhejiang Province, China
| | - Jun Cai
- Departments of Pediatrics and Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, Kentucky, United States of America
| | - Xin-Qiao Tian
- Department of Ultrasonography, the Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
- * E-mail: (CTL); (XQT); (HLW)
| | - Ho Lun Wong
- School of Pharmacy, Temple University, Philadelphia, Pennsylvania, United States of America
- * E-mail: (CTL); (XQT); (HLW)
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Lihong W, Xin C, Yongxue G, Yiying B, Gang C. Thermoresponsive ophthalmic poloxamer/tween/carbopolin situgels of a poorly water-soluble drug fluconazole: preparation andin vitro–in vivoevaluation. Drug Dev Ind Pharm 2013; 40:1402-10. [DOI: 10.3109/03639045.2013.828221] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Kao HJ, Lo YL, Vong WJ, Lin YJ, Lin HR. Treating allergic conjunctivitis using in situ polyelectrolyte gelling systems. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012. [DOI: 10.1163/156856206778530740] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Abstract
This review covers both noninvasive and invasive ophthalmic drug delivery systems that can have application to therapy of veterinary ophthalmic diseases. Noninvasive approaches include gel technologies, permeation enhancement via pro-drug development, solubilization agents and nanoparticle technologies, iontophoresis, microneedles, drug-eluting contact lenses and eye misters, and microdroplets. More invasive systems include both eroding implants and noneroding technologies that encompass diffusion based systems, active pumps, intraocular lenses, suprachoroidal drug delivery, and episcleral reservoirs. In addition to addressing the physiologic challenges of achieving the necessary duration of delivery, tissue targeting and patient compliance, the commercial development factors of biocompatibility, sterilization, manufacturability and long-term stability will be discussed.
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21
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Thixotropic property in pharmaceutical formulations. J Control Release 2009; 136:88-98. [DOI: 10.1016/j.jconrel.2009.02.013] [Citation(s) in RCA: 224] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2009] [Accepted: 02/18/2009] [Indexed: 11/19/2022]
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Nair A, Thevenot P, Hu W, Tang L. NANOTECHNOLOGY IN THE TREATMENT AND DETECTION OF INTRAOCULAR CANCERS. J Biomed Nanotechnol 2008; 4:410-418. [PMID: 20668648 PMCID: PMC2910442 DOI: 10.1166/jbn.2008.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2023]
Abstract
Tremendous progress in nanotechnology has lead to the development of nanometer-sized objects as medical implants or devices. Many of these nanodevices have recently been tested in many cancer diagnostic and therapeutic applications, such as leukemia, melanoma, breast tumor, prostate tumor, and brain cancer. Despite the increasing importance of nanotechnology in cancer, the potential of these nanodevices in diagnosing and treating intraocular cancers has not been systematically evaluated. This review summarizes the significant advancements and potential areas for development in the field of nanotechnology-based intraocular drug delivery and imaging.
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Affiliation(s)
- Ashwin Nair
- Department of Bioengineering, University of Texas at Arlington, PO Box 19138, Arlington, TX 76019-0138
| | - Paul Thevenot
- Department of Bioengineering, University of Texas at Arlington, PO Box 19138, Arlington, TX 76019-0138
| | - Wenjing Hu
- Progenitec Inc., Arlington, Texas, 76001
| | - Liping Tang
- Department of Bioengineering, University of Texas at Arlington, PO Box 19138, Arlington, TX 76019-0138
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Jain SP, Shah SP, Rajadhyaksha NS, Singh P. S. PP, Amin PD. In Situ Ophthalmic Gel of Ciprofloxacin Hydrochloride for Once a Day Sustained Delivery. Drug Dev Ind Pharm 2008; 34:445-52. [DOI: 10.1080/03639040701831710] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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24
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Barbu E, Verestiuc L, Nevell TG, Tsibouklis J. Polymeric materials for ophthalmic drug delivery: trends and perspectives. ACTA ACUST UNITED AC 2006. [DOI: 10.1039/b605640g] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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