51
|
Han L, Xu J, Lu X, Gan D, Wang Z, Wang K, Zhang H, Yuan H, Weng J. Biohybrid methacrylated gelatin/polyacrylamide hydrogels for cartilage repair. J Mater Chem B 2017; 5:731-741. [DOI: 10.1039/c6tb02348g] [Citation(s) in RCA: 98] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
We prepared a biohybrid hydrogel based on acrylamide and GelMA, having good mechanical properties, thermal stability, and bioactivity for cartilage regeneration.
Collapse
Affiliation(s)
- Lu Han
- Key Lab of Advanced Technologies of Materials
- Ministry of Education
- School of Materials Science and Engineering
- Southwest Jiaotong University
- Chengdu 610031
| | - Jielong Xu
- Key Lab of Advanced Technologies of Materials
- Ministry of Education
- School of Materials Science and Engineering
- Southwest Jiaotong University
- Chengdu 610031
| | - Xiong Lu
- Key Lab of Advanced Technologies of Materials
- Ministry of Education
- School of Materials Science and Engineering
- Southwest Jiaotong University
- Chengdu 610031
| | - Donglin Gan
- Key Lab of Advanced Technologies of Materials
- Ministry of Education
- School of Materials Science and Engineering
- Southwest Jiaotong University
- Chengdu 610031
| | - Zhixiong Wang
- Key Lab of Advanced Technologies of Materials
- Ministry of Education
- School of Materials Science and Engineering
- Southwest Jiaotong University
- Chengdu 610031
| | - Kefeng Wang
- National Engineering Research Center for Biomaterials
- Genome Research Center for Biomaterials
- Sichuan University
- Chengdu 610064
- China
| | - Hongping Zhang
- Engineering Research Center of Biomass Materials
- Ministry of Education
- School of Materials Science and Engineering
- Southwest University of Science and Technology
- Mianyang 621010
| | - Huipin Yuan
- College of Physical Science and Technology
- Sichuan University
- Chengdu
- China
| | - Jie Weng
- Key Lab of Advanced Technologies of Materials
- Ministry of Education
- School of Materials Science and Engineering
- Southwest Jiaotong University
- Chengdu 610031
| |
Collapse
|
52
|
Kim H, Kong WH, Seong KY, Sung DK, Jeong H, Kim JK, Yang SY, Hahn SK. Hyaluronate-Epidermal Growth Factor Conjugate for Skin Wound Healing and Regeneration. Biomacromolecules 2016; 17:3694-3705. [PMID: 27775884 DOI: 10.1021/acs.biomac.6b01216] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Epidermal growth factor (EGF) has been recognized as an excellent wound healing agent due to its therapeutic function stimulating skin cell growth, proliferation and differentiation. However, the transdermal delivery of EGF poses a significant challenge due to its short half-life and lack of efficient formulation. Here, to improve the transdermal delivery efficiency, EGF was conjugated to hyaluronate (HA), which was formulated into a patch-type film for skin wound healing. HA-EGF conjugate was synthesized by coupling reaction between aldehyde-modified HA and N-terminal amine group of EGF to minimize the loss of biological activities. The HA-EGF conjugates exhibited similar biological activities with native EGF as confirmed by ELISA and proliferation tests using murine and human fibroblasts. For the efficient topical delivery, HA-EGF conjugates were incorporated into a matrix film of high molecular weight HA. Two-photon microscopy clearly visualized more efficient transdermal delivery of HA-EGF conjugates to both normal skin and peripheral tissues around the wound area rather than that of EGF. Optical imaging and ELISA after in vivo transdermal delivery showed that the conjugation of EGF to HA retarded its degradation and extended its residence time in the wound area. Furthermore, in vivo transdermal delivery of HA-EGF conjugate in the patch-type HA film resulted in significantly improved regeneration of skin tissues even into hypodermis.
Collapse
Affiliation(s)
- Hyemin Kim
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH) , 77 Cheongam-ro, Nam-gu, Pohang, Kyungbuk 790-784, Republic of Korea
| | - Won Ho Kong
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH) , 77 Cheongam-ro, Nam-gu, Pohang, Kyungbuk 790-784, Republic of Korea
| | - Keum-Yong Seong
- Department of Biomaterials Science, Life and Industry Convergence Institute, Pusan National University , 1268-50, Samnangjin-ro, Samnangjin-eup, Miryang, Gyeongnam 50463, Republic of Korea
| | - Dong Kyung Sung
- Department of Pediatrics, Samsung Medical Center, School of Medicine, Sungkyunkwan University , 81 Irwon-ro, Gangnam-gu, Seoul 06351, Republic of Korea
| | - Hyeonseon Jeong
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH) , 77 Cheongam-ro, Nam-gu, Pohang, Kyungbuk 790-784, Republic of Korea
| | - Jin Kon Kim
- National Creative Research Initiative Center for Smart Block Copolymers, Department of Chemical Engineering, POSTECH , 77 Cheongam-ro, Nam-gu, Pohang, Kyungbuk 790-784, Republic of Korea
| | - Seung Yun Yang
- Department of Biomaterials Science, Life and Industry Convergence Institute, Pusan National University , 1268-50, Samnangjin-ro, Samnangjin-eup, Miryang, Gyeongnam 50463, Republic of Korea
| | - Sei Kwang Hahn
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH) , 77 Cheongam-ro, Nam-gu, Pohang, Kyungbuk 790-784, Republic of Korea
| |
Collapse
|
53
|
3D bioprinting matrices with controlled pore structure and release function guide in vitro self-organization of sweat gland. Sci Rep 2016; 6:34410. [PMID: 27694985 PMCID: PMC5046070 DOI: 10.1038/srep34410] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Accepted: 09/12/2016] [Indexed: 12/18/2022] Open
Abstract
3D bioprinting matrices are novel platforms for tissue regeneration. Tissue self-organization is a critical process during regeneration that implies the features of organogenesis. However, it is not clear from the current evidences whether 3D printed construct plays a role in guiding tissue self-organization in vitro. Based on our previous study, we bioprinted a 3D matrix as the restrictive niche for direct sweat gland differentiation of epidermal progenitors by different pore structure (300-μm or 400-μm nozzle diameters printed) and reported a long-term gradual transition of differentiated cells into glandular morphogenesis occurs within the 3D construct in vitro. At the initial 14-day culture, an accelerated cell differentiation was achieved with inductive cues released along with gelatin reduction. After protein release completed, the 3D construct guide the self-organized formation of sweat gland tissues, which is similar to that of the natural developmental process. However, glandular morphogenesis was only observed in 300-μm–printed constructs. In the absence of 3D architectural support, glandular morphogenesis was not occurred. This striking finding made us to identify a previously unknown role of the 3D-printed structure in glandular tissue regeneration, and this self-organizing strategy can be applied to forming other tissues in vitro.
Collapse
|
54
|
Zhou N, Liu C, Lv S, Sun D, Qiao Q, Zhang R, Liu Y, Xiao J, Sun G. Degradation prediction model and stem cell growth of gelatin-PEG composite hydrogel. J Biomed Mater Res A 2016; 104:3149-3156. [PMID: 27466028 DOI: 10.1002/jbm.a.35847] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 07/20/2016] [Accepted: 07/27/2016] [Indexed: 12/27/2022]
Affiliation(s)
- Nan Zhou
- Scientific Research Center for Translational Medicine; Dalian Institute of Chemical Physics, Chinese Academy of Sciences; Dalian 116023 China
- Department of Oral Pathology; College of Stomatology, Dalian Medical University; Dalian 116044 China
| | - Chang Liu
- Scientific Research Center for Translational Medicine; Dalian Institute of Chemical Physics, Chinese Academy of Sciences; Dalian 116023 China
- Dalian Municipal Central Hospital; Dalian 116033 China
| | - Shijie Lv
- Dalian Maternity & Child Healthcare Hospital; Dalian 116033 China
| | - Dongsheng Sun
- Scientific Research Center for Translational Medicine; Dalian Institute of Chemical Physics, Chinese Academy of Sciences; Dalian 116023 China
| | - Qinglong Qiao
- Scientific Research Center for Translational Medicine; Dalian Institute of Chemical Physics, Chinese Academy of Sciences; Dalian 116023 China
| | - Rui Zhang
- Department of Stomatology; First Affiliated Hospital, Dalian Medical University; Dalian 116023 China
| | - Yang Liu
- Scientific Research Center for Translational Medicine; Dalian Institute of Chemical Physics, Chinese Academy of Sciences; Dalian 116023 China
| | - Jing Xiao
- Department of Oral Pathology; College of Stomatology, Dalian Medical University; Dalian 116044 China
| | - Guangwei Sun
- Scientific Research Center for Translational Medicine; Dalian Institute of Chemical Physics, Chinese Academy of Sciences; Dalian 116023 China
| |
Collapse
|
55
|
Li X, Ye X, Qi J, Fan R, Gao X, Wu Y, Zhou L, Tong A, Guo G. EGF and curcumin co-encapsulated nanoparticle/hydrogel system as potent skin regeneration agent. Int J Nanomedicine 2016; 11:3993-4009. [PMID: 27574428 PMCID: PMC4993277 DOI: 10.2147/ijn.s104350] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Wound healing is a complex multifactorial process that relies on coordinated signaling molecules to succeed. Epidermal growth factor (EGF) is a mitogenic polypeptide that stimulates wound repair; however, precise control over its application is necessary to reduce the side effects and achieve desired therapeutic benefits. Moreover, the extensive oxidative stress during the wound healing process generally inhibits repair of the injured tissues. Topical applications of antioxidants like curcumin (Cur) could protect tissues from oxidative damage and significantly improve tissue remodeling. To achieve much accelerated wound healing effects, we designed a novel dual drug co-loaded in situ gel-forming nanoparticle/hydrogel system (EGF-Cur-NP/H) which acted not only as a supportive matrix for the regenerative tissue, but also as a sustained drug depot for EGF and Cur. In the established excisional full-thickness wound model, EGF-Cur-NP/H treatment significantly enhanced wound closure through increasing granulation tissue formation, collagen deposition, and angiogenesis, relative to normal saline, nanoparticle/hydrogel (NP/H), Cur-NP/H, and EGF-NP/H treated groups. In conclusion, this study provides a biocompatible in situ gel-forming system for efficient topical application of EGF and Cur in the landscape of tissue repair.
Collapse
Affiliation(s)
- Xiaoling Li
- State Key Laboratory of Biotherapy and Cancer Center, Department of Neurosurgery, West China Hospital, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, People's Republic of China
| | - Xianlong Ye
- College of Life Science, Northeast Agriculture University, Harbin, People's Republic of China
| | - Jianying Qi
- College of Life Science, Northeast Agriculture University, Harbin, People's Republic of China
| | - Rangrang Fan
- State Key Laboratory of Biotherapy and Cancer Center, Department of Neurosurgery, West China Hospital, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, People's Republic of China
| | - Xiang Gao
- State Key Laboratory of Biotherapy and Cancer Center, Department of Neurosurgery, West China Hospital, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, People's Republic of China
| | - Yunzhou Wu
- College of Life Science, Northeast Agriculture University, Harbin, People's Republic of China
| | - Liangxue Zhou
- State Key Laboratory of Biotherapy and Cancer Center, Department of Neurosurgery, West China Hospital, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, People's Republic of China
| | - Aiping Tong
- State Key Laboratory of Biotherapy and Cancer Center, Department of Neurosurgery, West China Hospital, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, People's Republic of China
| | - Gang Guo
- State Key Laboratory of Biotherapy and Cancer Center, Department of Neurosurgery, West China Hospital, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, People's Republic of China
| |
Collapse
|
56
|
Ohno T, Hirano S, Kanemaru SI, Yamashita M, Umeda H, Suehiro A, Tamura Y, Nakamura T, Ito J, Tabata Y. Drug Delivery System of Hepatocyte Growth Factor for the Treatment of Vocal Fold Scarring in a Canine Model. Ann Otol Rhinol Laryngol 2016; 116:762-9. [DOI: 10.1177/000348940711601008] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Objectives: Vocal fold scarring remains a therapeutic challenge. Previous studies have indicated that hepatocyte growth factor (HGF), a strong antifibrotic element, has therapeutic potential for restoring scarred vocal folds. To enhance the effect of HGF in vivo, we developed a novel drug delivery system (DDS) in which HGF is embedded in gelatin hydrogel and continuously released over a period of 2 weeks. In the present study we investigated the therapeutic efficacy of the HGF DDS on vocal fold scarring by using a canine model. Methods: The vocal folds of 8 beagles were unilaterally scarred by stripping the entire layer of the lamina propria. The contralateral vocal folds were kept intact as normal controls. One month after the procedure, hydrogels (0.5 mL) containing 1 μg of HGF were injected into the scarred vocal folds of 4 dogs (HGF-treated group), whereas hydrogels containing saline solution were injected in the other 4 dogs (sham group). Histologic and vibratory examinations were completed for each group 6 months after the initial surgery. Results: The excised larynx experiments showed significantly better vibration in terms of mucosal wave amplitude and glottal closure in the HGF-treated group compared to the sham group. Histologic evaluation of the vocal folds indicated remarkable reduction in collagen deposition and tissue contraction, with favorable restoration of hyaluronic acid and elastin in the HGF-treated group. Conclusions: The present findings suggest that the novel HGF DDS may provide favorable effects in restoring the vibratory properties of scarred vocal folds.
Collapse
|
57
|
Lai JY, Li YT. Influence of Cross-Linker Concentration on the Functionality of Carbodiimide Cross-Linked Gelatin Membranes for Retinal Sheet Carriers. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2016; 22:277-95. [PMID: 20557713 DOI: 10.1163/092050609x12603600753204] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Carbodiimide cross-linking can easily regulate the functionality of gelatin carriers used for retinal sheet delivery. This paper investigates the effect of cross-linker concentrations (0-0.4 mmol EDC/mg gelatin membrane (GM)) on the properties of the chemically-modified GMs. ATR-FT-IR and ninhydrin analyses results consistently indicated that the EDC cross-linking reaction approaches saturation at concentrations around 0.02 mmol EDC/mg GM. The thermal stability and resistance to water dissolution and collagenase digestion were significantly enhanced with increasing cross-linker concentration from 0.001 to 0.02 mmol EDC/mg GM. In addition, the chemical cross-linking did not affect the ability to form a tissue-encapsulating structure at 37°C. Irrespective of their cross-linking degree, the GMs had an appropriate degradation rate sufficient to allow tissue integration. It was noted that, although high cross-linker concentrations can be used to improve the delivery efficiency of gelatin samples, the treatment with 0.1-0.4 mmol EDC/mg GM may lead to poor biocompatibility. Results of Live/Dead and pro-inflammatory cytokine expression analyses showed that the exposure of ARPE-19 cultures to the test materials cross-linked with a concentration ≥0.1 mmol EDC/mg GM induces significant cytotoxicity and high levels of interleukin-1β and interleukin-6. However, the presence of EDC cross-linked gelatin membranes in the culture medium had no effect on the glutamate uptake capacity. It is concluded that among the cross-linked gelatin samples studied, 0.02 mmol EDC/mg GM is the best cross-linker concentration for preparation of retinal sheet delivery carriers.
Collapse
Affiliation(s)
- Jui-Yang Lai
- a Institute of Biochemical and Biomedical Engineering, Chang Gung University, Taoyuan, Taiwan 33302, Republic of China; Biomedical Engineering Research Center, Chang Gung University, Taoyuan, Taiwan 33302, Republic of China; Molecular Medicine Research Center, Chang Gung University, Taoyuan, Taiwan 33302, Republic of China
| | | |
Collapse
|
58
|
Epidermal growth factor loaded heparin-based hydrogel sheet for skin wound healing. Carbohydr Polym 2016; 147:251-260. [PMID: 27178931 DOI: 10.1016/j.carbpol.2016.03.072] [Citation(s) in RCA: 134] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 03/22/2016] [Accepted: 03/23/2016] [Indexed: 11/20/2022]
Abstract
A heparin-based hydrogel sheet composed of thiolated heparin and diacrylated poly (ethylene glycol) was prepared via photo polymerization and human epidermal growth factor (hEGF) were loaded into it for the purpose of wound healing. It showed a sustained release profile of hEGF in vitro. In order to evaluate its function on wound healing in vivo, full thickness wounds were created on the dorsal surface of mice. Application of hEGF loaded heparin-based hydrogel sheet accelerated the wound closure compared to the non-treated control group, hEGF solution, and hEGF loaded PEG hydrogel sheet. Histological and immunohistological examinations also demonstrated an advanced granulation tissue formation, capillary formation, and epithelialization in wounds treated by hEGF loaded heparin-based hydrogel compared to other groups, and no biocompatibility issue was observed. In conclusion, the delivery of hEGF using the heparin-based hydrogel could accelerate the skin wound healing process.
Collapse
|
59
|
Mozumder MS, Mairpady A, Mourad AHI. Polymeric nanobiocomposites for biomedical applications. J Biomed Mater Res B Appl Biomater 2016; 105:1241-1259. [PMID: 26910862 DOI: 10.1002/jbm.b.33633] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Revised: 01/18/2016] [Accepted: 01/20/2016] [Indexed: 01/20/2023]
Abstract
Polymeric nanobiocomposites have recently become one of the most essential sought after materials for biomedical applications ranging from implants to the creation of gels. Their unique mechanical and biological properties provide them the ability to pass through the highly guarded defense mechanism without undergoing noticeable degradation and initiation of immune responses, which in turn makes them advantageous over the other alternatives. Aligned with the advances in tissue engineering, it is also possible to design three-dimensional extracellular matrix using these polymeric nanobiocomposites that could closely mimic the human tissues. In fact, unique polymer chemistry coupled with nanoparticles could create unique microenvironment that promotes cell growth and differentiation. In addition, the nanobiocomposites can also be devised to carry drugs efficiently to the target site without exhibiting any cytotoxicity as well as to eradicate surgical infections. In this article, an effort has been made to thoroughly review a number of different types/classes of polymeric nanocomposites currently used in biomedical fields. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 1241-1259, 2017.
Collapse
Affiliation(s)
| | - Anusha Mairpady
- Chemical & Petroleum Engineering Department, UAE University, Al Ain, UAE
| | | |
Collapse
|
60
|
Ogino S, Morimoto N, Sakamoto M, Jinno C, Taira T, Suzuki S. Efficacy of gelatin gel sheets sustaining epidermal growth factor for murine skin defects. J Surg Res 2015; 201:446-54. [PMID: 27020831 DOI: 10.1016/j.jss.2015.11.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Revised: 10/05/2015] [Accepted: 11/18/2015] [Indexed: 11/28/2022]
Abstract
BACKGROUND Epidermal growth factor (EGF) plays an important role in wound healing. However, EGF must be applied daily due to rapid inactivation in vivo. We investigated the sustained release of EGF from gelatin gel sheets (GGSs) and the efficacy of GGSs impregnated with EGF for promoting wound healing. MATERIALS AND METHODS GGSs impregnated with EGF were prepared by cross-linking via glutaraldehyde to gelatin solution containing EGF. The sustained release of EGF and the bioactivity of released EGF were evaluated. Then, three kinds of GGSs containing NSS (normal saline solution; NSS group), 2.5 μg of EGF (EGF-L group), or 25 μg of EGF (EGF-H group) were applied to full-thickness skin defects created on the backs of mice. The wounds covered with polyurethane film without GGS were used as a control (PUF group). The wound area, neoepithelium length, regenerated granulation tissue, and newly formed capillaries were evaluated. RESULTS EGF was sustained and released from GGS as it degraded. The bioactivity of released EGF was confirmed. EGF-L group promoted the neoepithelium length, regenerated granulation tissue, and newly formed capillaries compared with those in the PUF and NSS groups. The area of regenerated granulation tissue in the NSS group (week 1: 2.6 + 0.2 mm(2), week 2: 2.8 + 0.3 mm(2)) was larger than that in the PUF group (week 1: 0.6 + 0.1 mm(2), week 2: 1.0 + 0.1 mm(2)). The area of newly formed capillaries in the EGF-L group (9967 + 1903 μm(2)) was larger than that of the EGF-H group (3485 + 1050 μm(2)). CONCLUSIONS GGSs impregnated with EGF-L showed promising results regarding wound healing.
Collapse
Affiliation(s)
- Shuichi Ogino
- Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Naoki Morimoto
- Department of Plastic and Reconstructive Surgery, Kansai Medical University, Hirakata, Japan.
| | - Michiharu Sakamoto
- Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Chizuru Jinno
- Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | | | - Shigehiko Suzuki
- Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| |
Collapse
|
61
|
Jungst T, Smolan W, Schacht K, Scheibel T, Groll J. Strategies and Molecular Design Criteria for 3D Printable Hydrogels. Chem Rev 2015; 116:1496-539. [PMID: 26492834 DOI: 10.1021/acs.chemrev.5b00303] [Citation(s) in RCA: 420] [Impact Index Per Article: 46.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Tomasz Jungst
- Department for Functional Materials in Medicine and Dentistry, University of Würzburg , Pleicherwall 2, 97070 Würzburg, Germany
| | - Willi Smolan
- Department for Functional Materials in Medicine and Dentistry, University of Würzburg , Pleicherwall 2, 97070 Würzburg, Germany
| | - Kristin Schacht
- Chair of Biomaterials, Faculty of Engineering Science, University of Bayreuth , Universitätsstrasse 30, 95447 Bayreuth, Germany
| | - Thomas Scheibel
- Chair of Biomaterials, Faculty of Engineering Science, University of Bayreuth , Universitätsstrasse 30, 95447 Bayreuth, Germany
| | - Jürgen Groll
- Department for Functional Materials in Medicine and Dentistry, University of Würzburg , Pleicherwall 2, 97070 Würzburg, Germany
| |
Collapse
|
62
|
In situ gel-forming AP-57 peptide delivery system for cutaneous wound healing. Int J Pharm 2015; 495:560-571. [PMID: 26363112 DOI: 10.1016/j.ijpharm.2015.09.005] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 08/07/2015] [Accepted: 09/07/2015] [Indexed: 02/05/2023]
Abstract
In situ gel-forming system as local drug delivery system in dermal traumas has generated a great interest. Accumulating evidence shows that antimicrobial peptides play pivotal roles in the process of wound healing. Here in this study, to explore the potential application of antimicrobial peptide in wound healing, biodegradable poly(L-lactic acid)-Pluronic L35-poly(L-lactic acid) (PLLA-L35-PLLA) was developed at first. Then based on this polymer, an injectable in situ gel-forming system composed of human antimicrobial peptides 57 (AP-57) loaded nanoparticles and thermosensitive hydrogel was prepared and applied for cutaneous wound healing. AP-57 peptides were enclosed with biocompatible nanoparticles (AP-57-NPs) with high drug loading and encapsulation efficiency. AP-57-NPs were further encapsulated in a thermosensitive hydrogel (AP-57-NPs-H) to facilitate its application in cutaneous wound repair. As a result, AP-57-NPs-H released AP-57 in an extended period and exhibited quite low cytotoxicity and high anti-oxidant activity in vitro. Moreover, AP-57-NPs-H was free-flowing liquid at room temperature, and can form non-flowing gel without any crosslink agent upon applied on the wounds. In vivo wound healing assay using full-thickness dermal defect model of SD rats indicated that AP-57-NPs-H could significantly promote wound healing. At day 14 after operation, AP-57-NPs-H treated group showed nearly complete wound closure of 96.78 ± 3.12%, whereas NS, NPs-H and AP-57-NPs group recovered by about 68.78 ± 4.93%, 81.96 ± 3.26% and 87.80 ± 4.62%, respectively. Histopathological examination suggested that AP-57-NPs-H could promote cutaneous wound healing through enhancing granulation tissue formation, increasing collagen deposition and promoting angiogenesis in the wound tissue. Therefore, AP-57-NPs-H might have potential application in wound healing.
Collapse
|
63
|
Hydrogels in ophthalmic applications. Eur J Pharm Biopharm 2015; 95:227-38. [DOI: 10.1016/j.ejpb.2015.05.016] [Citation(s) in RCA: 130] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Revised: 05/05/2015] [Accepted: 05/21/2015] [Indexed: 12/20/2022]
|
64
|
Zhao HY, Wu J, Zhu JJ, Xiao ZC, He CC, Shi HX, Li XK, Yang SL, Xiao J. Research Advances in Tissue Engineering Materials for Sustained Release of Growth Factors. BIOMED RESEARCH INTERNATIONAL 2015; 2015:808202. [PMID: 26347885 PMCID: PMC4548067 DOI: 10.1155/2015/808202] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Revised: 07/28/2015] [Accepted: 08/02/2015] [Indexed: 12/04/2022]
Abstract
Growth factors are a class of cytokines that stimulate cell growth and are widely used in clinical practice, such as wound healing, revascularization, bone repair, and nervous system disease. However, free growth factors have a short half-life and are instable in vivo. Therefore, the search of excellent carriers to enhance sustained release of growth factors in vivo has become an area of intense research interest. The development of controlled-release systems that protect the recombinant growth factors from enzymatic degradation and provide sustained delivery at the injury site during healing should enhance the growth factor's application in tissue regeneration. Thus, this study reviews current research on commonly used carriers for sustained release of growth factors and their sustained release effects for preservation of their bioactivity and their accomplishment in tissue engineering approaches.
Collapse
Affiliation(s)
- Hai-yang Zhao
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China
- Molecular Pharmacology Research Center, Key Laboratory of Biotechnology and Pharmaceutical Engineering, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
| | - Jiang Wu
- Molecular Pharmacology Research Center, Key Laboratory of Biotechnology and Pharmaceutical Engineering, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
| | - Jing-jing Zhu
- Molecular Pharmacology Research Center, Key Laboratory of Biotechnology and Pharmaceutical Engineering, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
| | - Ze-cong Xiao
- Molecular Pharmacology Research Center, Key Laboratory of Biotechnology and Pharmaceutical Engineering, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
| | - Chao-chao He
- Molecular Pharmacology Research Center, Key Laboratory of Biotechnology and Pharmaceutical Engineering, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
| | - Hong-xue Shi
- Molecular Pharmacology Research Center, Key Laboratory of Biotechnology and Pharmaceutical Engineering, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
| | - Xiao-kun Li
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China
- Molecular Pharmacology Research Center, Key Laboratory of Biotechnology and Pharmaceutical Engineering, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
| | - Shu-lin Yang
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China
| | - Jian Xiao
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China
- Molecular Pharmacology Research Center, Key Laboratory of Biotechnology and Pharmaceutical Engineering, School of Pharmaceutical Science, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
| |
Collapse
|
65
|
Development and in vitro evaluation of lipid nanoparticle-based dressings for topical treatment of chronic wounds. Int J Pharm 2015; 490:404-11. [DOI: 10.1016/j.ijpharm.2015.05.075] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Revised: 05/28/2015] [Accepted: 05/30/2015] [Indexed: 01/20/2023]
|
66
|
Recent progress in biomedical applications of Pluronic (PF127): Pharmaceutical perspectives. J Control Release 2015; 209:120-38. [PMID: 25921088 DOI: 10.1016/j.jconrel.2015.04.032] [Citation(s) in RCA: 234] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Revised: 04/23/2015] [Accepted: 04/24/2015] [Indexed: 10/23/2022]
Abstract
Most of the administered anti-cancer drugs are hydrophobic in nature and are known to have poor water solubility, short residence time, rapid clearance from the body and systemic side effects. Polymeric-based targeted particulate carrier system has shown to directly deliver the encapsulated anti-cancer drug to the desired site of action and prevent the interaction of encapsulated drug with the normal cells. Pluronic F127 (PF127) has been widely investigated for its broad-range of therodiagnostic applications in biomedical and pharmaceutical sciences, but rapid dissolution in the physiological fluids, short residence time, rapid clearance, and weak mechanical strength are the main shortcomings that are associated with PF127 and have recently been overcome by making various modifications in the structure of PF127 notably through preparation of PF127-based mixed polymeric micelles, PF127-conjugated nanoparticles and PF127-based hydrophobically modified thermogels. In this article, we have briefly discussed the recent studies that have been conducted on various anti-cancer drugs using PF127 as nano-carrier modified with other copolymers and/or conjugated with magnetic nanoparticles. The key findings of these studies demonstrated that the modified form of PF127 can significantly increase the stability of incorporated hydrophobic drugs with enhanced in vitro cytotoxicity and cellular uptake of anti-cancer drugs. Moreover, the modified form of PF127 has also shown its therapeutic potentials as therodiagnostics in various types of tumors and cancers. Hence, it can be concluded that the modified form of PF127 exhibits significant therodiagnostic effects with increased tumor-specific delivery of anti-cancer drugs having minimal toxic effects as compared to PF127 alone and/or other copolymers.
Collapse
|
67
|
Epidermal growth factor mediated healing in stem cell-derived vocal fold mucosa. J Surg Res 2015; 197:32-8. [PMID: 25818979 DOI: 10.1016/j.jss.2015.02.066] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2014] [Revised: 02/03/2015] [Accepted: 02/26/2015] [Indexed: 11/24/2022]
Abstract
BACKGROUND The goal of vocal fold wound healing is the reconstitution of functional tissue, including a structurally and functionally intact epithelium. Mechanisms underlying reepithelialization in vocal folds are not known, although it is suspected that healing involves the interplay between several growth factors. We used a three-dimensional human embryonic stem cell-derived model of vocal fold mucosa to examine the effects of one growth factor, exogenous epidermal growth factor (EGF), on wound healing. MATERIALS AND METHODS A scratch wound was created in the in vitro model. Rate of wound healing, epidermal growth factor receptor (EGFR) activation, and cell proliferation after injury were analyzed with and without application of both exogenous EGF and an EGFR inhibitor, gefitinib. RESULTS Wound repair after injury was significantly hastened by application of exogenous EGF (13.3 μm/h, ± 2.63) compared with absence of exogenous EGF (7.1 μm/h ± 2.84), but inhibited with concurrent addition of Gefitinib (5.2 μm/h, ± 2.23), indicating that EGF mediates wound healing in an EGFR-dependent manner. Immunohistochemistry revealed that EGFR activation occurred only in the presence of exogenous EGF. Although not statistically significant, increased density of Ki67 staining in the epithelium adjacent to the scratch wound was observed after treatment with EGF, suggesting a tendency for exogenous EGF to increase epithelial cell proliferation. CONCLUSIONS Exogenous EGF increases the rate of wound healing in an EGFR-dependent manner in a three-dimensional stem cell-derived model of vocal fold mucosa. This model of wound healing can be used to gain insight into the mechanisms that regulate vocal fold epithelial repair after injury.
Collapse
|
68
|
Khan F, Tanaka M, Ahmad SR. Fabrication of polymeric biomaterials: a strategy for tissue engineering and medical devices. J Mater Chem B 2015; 3:8224-8249. [DOI: 10.1039/c5tb01370d] [Citation(s) in RCA: 153] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Fabrication of biomaterials scaffolds using various methods and techniques is discussed, utilising biocompatible, biodegradable and stimuli-responsive polymers and their composites. This review covers the lithography and printing techniques, self-organisation and self-assembly methods for 3D structural scaffolds generation, and smart hydrogels, for tissue regeneration and medical devices.
Collapse
Affiliation(s)
- Ferdous Khan
- Senior Polymer Chemist
- ECOSE-Biopolymer
- Knauf Insulation Limited
- St. Helens
- UK
| | - Masaru Tanaka
- Biomaterials Science Group
- Department of Biochemical Engineering
- Graduate School of Science and Engineering
- Yamagata University
- Yonezawa
| | - Sheikh Rafi Ahmad
- Centre for Applied Laser Spectroscopy
- CDS
- DEAS
- Cranfield University
- Swindon
| |
Collapse
|
69
|
Alexander A, Ajazuddin, Khan J, Saraf S, Saraf S. Polyethylene glycol (PEG)–Poly(N-isopropylacrylamide) (PNIPAAm) based thermosensitive injectable hydrogels for biomedical applications. Eur J Pharm Biopharm 2014; 88:575-85. [DOI: 10.1016/j.ejpb.2014.07.005] [Citation(s) in RCA: 90] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Revised: 07/06/2014] [Accepted: 07/08/2014] [Indexed: 01/01/2023]
|
70
|
A novel strategy for the treatment of chronic wounds based on the topical administration of rhEGF-loaded lipid nanoparticles: In vitro bioactivity and in vivo effectiveness in healing-impaired db/db mice. J Control Release 2014; 185:51-61. [DOI: 10.1016/j.jconrel.2014.04.032] [Citation(s) in RCA: 114] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Revised: 04/15/2014] [Accepted: 04/18/2014] [Indexed: 12/29/2022]
|
71
|
Rose JB, Pacelli S, Haj AJE, Dua HS, Hopkinson A, White LJ, Rose FRAJ. Gelatin-Based Materials in Ocular Tissue Engineering. MATERIALS (BASEL, SWITZERLAND) 2014; 7:3106-3135. [PMID: 28788609 PMCID: PMC5453355 DOI: 10.3390/ma7043106] [Citation(s) in RCA: 198] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Revised: 03/17/2014] [Accepted: 03/24/2014] [Indexed: 12/13/2022]
Abstract
Gelatin has been used for many years in pharmaceutical formulation, cell culture and tissue engineering on account of its excellent biocompatibility, ease of processing and availability at low cost. Over the last decade gelatin has been extensively evaluated for numerous ocular applications serving as cell-sheet carriers, bio-adhesives and bio-artificial grafts. These different applications naturally have diverse physical, chemical and biological requirements and this has prompted research into the modification of gelatin and its derivatives. The crosslinking of gelatin alone or in combination with natural or synthetic biopolymers has produced a variety of scaffolds that could be suitable for ocular applications. This review focuses on methods to crosslink gelatin-based materials and how the resulting materials have been applied in ocular tissue engineering. Critical discussion of recent innovations in tissue engineering and regenerative medicine will highlight future opportunities for gelatin-based materials in ophthalmology.
Collapse
Affiliation(s)
- James B Rose
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK.
| | - Settimio Pacelli
- Department of Drug Chemistry and Technologies, "Sapienza" University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy.
| | - Alicia J El Haj
- Institute for Science and Technology in Medicine, Keele University, Stoke-on-Trent ST4 7QB, UK.
| | - Harminder S Dua
- Academic Ophthalmology, Division of Clinical Neuroscience, University of Nottingham, Nottingham NG7 2RD, UK.
| | - Andrew Hopkinson
- Academic Ophthalmology, Division of Clinical Neuroscience, University of Nottingham, Nottingham NG7 2RD, UK.
| | - Lisa J White
- School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK.
| | | |
Collapse
|
72
|
Fabrication and evaluation of growth factor-immobilized injectable microspheres for the soft tissue augmentation. Tissue Eng Regen Med 2014. [DOI: 10.1007/s13770-013-1126-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
|
73
|
Kumar PTS, Praveen G, Raj M, Chennazhi KP, Jayakumar R. Flexible, micro-porous chitosan–gelatin hydrogel/nanofibrin composite bandages for treating burn wounds. RSC Adv 2014. [DOI: 10.1039/c4ra11969j] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Fibrin nanoparticles were incorporated into a chitosan–gelatin hydrogel matrix to develop a composite bandage with wound-healing potential.
Collapse
Affiliation(s)
- P. T. Sudheesh Kumar
- Amrita Centre for Nanosciences and Molecular Medicine
- Amrita Institute of Medical Sciences and Research Centre
- Amrita Vishwa Vidyapeetham University
- Kochi-682041
- India
| | - G. Praveen
- Amrita Centre for Nanosciences and Molecular Medicine
- Amrita Institute of Medical Sciences and Research Centre
- Amrita Vishwa Vidyapeetham University
- Kochi-682041
- India
| | - Mincy Raj
- Amrita Centre for Nanosciences and Molecular Medicine
- Amrita Institute of Medical Sciences and Research Centre
- Amrita Vishwa Vidyapeetham University
- Kochi-682041
- India
| | - K. P. Chennazhi
- Amrita Centre for Nanosciences and Molecular Medicine
- Amrita Institute of Medical Sciences and Research Centre
- Amrita Vishwa Vidyapeetham University
- Kochi-682041
- India
| | - R. Jayakumar
- Amrita Centre for Nanosciences and Molecular Medicine
- Amrita Institute of Medical Sciences and Research Centre
- Amrita Vishwa Vidyapeetham University
- Kochi-682041
- India
| |
Collapse
|
74
|
Jin G, Prabhakaran MP, Kai D, Ramakrishna S. Controlled release of multiple epidermal induction factors through core–shell nanofibers for skin regeneration. Eur J Pharm Biopharm 2013; 85:689-98. [DOI: 10.1016/j.ejpb.2013.06.002] [Citation(s) in RCA: 80] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2013] [Revised: 05/27/2013] [Accepted: 06/03/2013] [Indexed: 12/16/2022]
|
75
|
Lai JY. Influence of solvent composition on the performance of carbodiimide cross-linked gelatin carriers for retinal sheet delivery. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2013; 24:2201-2210. [PMID: 23677435 DOI: 10.1007/s10856-013-4961-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Accepted: 05/07/2013] [Indexed: 06/02/2023]
Abstract
Gelatin is a protein molecule that displays bioaffinity and provides a template to guide retinal pigment epithelial (RPE) cell organization and growth. We have recently demonstrated that the carbodiimide cross-linked gelatin membranes can be used as retinal sheet carriers. The purpose of this work was to further determine the role of solvent composition in the tissue delivery performance of chemically modified biopolymer matrices. The gelatin molecules were treated with 1-ethyl-3-(3-dimethyl aminopropyl) carbodiimide (EDC) in the presence of binary ethanol/water mixtures with varying ethanol concentrations (70-95 vol%) to obtain the carriers with different cross-linking efficiencies and mechanical properties. Results of melting point measurements and in vitro degradation tests showed that when the cross-linking index reached a high level of around 45 %, the EDC cross-linked gelatin materials have sufficient thermal stability and resistance to enzymatic degradation, indicating their suitability for the development of carriers for retinal sheet delivery. Irrespective of the solvent composition, the chemically modified gelatin samples are compatible toward human RPE cells without causing toxicity and inflammation. In particular, the membrane carriers prepared by the cross-linking in the presence of solvent mixtures containing 80-90 vol% of ethanol have no impact on the proliferative capacity of ARPE-19 cultures and possess good efficiency in transferring and encapsulating the retinal tissues. It is concluded that, except for cell viability and pro-inflammatory cytokine expression, the retinal sheet delivery performance strongly depends on the solvent composition for EDC cross-linking of gelatin molecules.
Collapse
Affiliation(s)
- Jui-Yang Lai
- Institute of Biochemical and Biomedical Engineering, Chang Gung University, Taoyuan, 33302 Taiwan, Republic of China.
| |
Collapse
|
76
|
Microstructure characterization through mechanical, electrokinetic and spectroscopic methods of polyampholyte gelatin hydrogels crosslinked with poly(vinyl alcohol). POLYMER 2013. [DOI: 10.1016/j.polymer.2013.03.045] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
|
77
|
Rocasalbas G, Francesko A, Touriño S, Fernández-Francos X, Guebitz GM, Tzanov T. Laccase-assisted formation of bioactive chitosan/gelatin hydrogel stabilized with plant polyphenols. Carbohydr Polym 2013; 92:989-96. [DOI: 10.1016/j.carbpol.2012.10.045] [Citation(s) in RCA: 83] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2012] [Revised: 10/17/2012] [Accepted: 10/18/2012] [Indexed: 01/24/2023]
|
78
|
The effect of epidermal growth factor (EGF) conjugated with low-molecular-weight protamine (LMWP) on wound healing of the skin. Biomaterials 2012; 33:8579-90. [DOI: 10.1016/j.biomaterials.2012.07.061] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2012] [Accepted: 07/28/2012] [Indexed: 02/03/2023]
|
79
|
Abstract
Growth factors are soluble secreted proteins capable of affecting a variety of cellular processes important for tissue regeneration. Consequently, the self-healing capacity of patients can be augmented by artificially enhancing one or more processes important for healing through the application of growth factors. However, their application in clinics remains limited due to lack of robust delivery systems and biomaterial carriers. Interestingly, all clinically approved therapies involving growth factors utilize some sort of a biomaterial carrier for growth factor delivery. This suggests that biomaterial delivery systems are extremely important for successful usage of growth factors in regenerative medicine. This review outlines the role of growth factors in tissue regeneration, and their application in both pre-clinical animal models of regeneration and clinical trials is discussed. Additionally, current status of biomaterial substrates and sophisticated delivery systems such as nanoparticles for delivery of exogenous growth factors and peptides in humans are reviewed. Finally, issues and possible future research directions for growth factor therapy in regenerative medicine are discussed.
Collapse
Affiliation(s)
- Piyush Koria
- Department of Chemical and Biomedical Engineering, University of South Florida, Tampa, FL 33620, USA.
| |
Collapse
|
80
|
Chen RN, Lee LW, Chen LC, Ho HO, Lui SC, Sheu MT, Su CH. Wound-healing effect of micronized sacchachitin (mSC) nanogel on corneal epithelium. Int J Nanomedicine 2012; 7:4697-706. [PMID: 22956870 PMCID: PMC3431972 DOI: 10.2147/ijn.s34530] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
The extraction residue of the Ganoderma fruiting body, named sacchachitin, has been demonstrated to have the potential to enhance cutaneous wound healing by inducing cell proliferation. In this study, a nanogel formed from micronized sacchachitin (mSC) was investigated for the potential treatment of superficial chemical corneal burns. Reportedly, mSC has been produced successfully and its chemical properties confirmed, and physical and rheological properties characterized. An in vitro cell proliferation study has revealed that at the concentrations of 200, 300, and 400 μg/mL, mSC nanogel significantly increased Statens Seruminstitut rabbit corneal (SIRC) cell proliferation after 24 hours of incubation. In cell migration assay, migration of SIRC cell to wound closure was observed after 24 hours of incubation with the addition of 200 μg/mL mSC of nanogel. In an animal study, acceleration of corneal wound healing was probably due to the inhibition of proteolysis. In conclusion, the findings of this study substantiate the potential application of sacchachitin in the form of mSC nanogel for the treatment of superficial corneal injuries.
Collapse
Affiliation(s)
- Ray-Neng Chen
- Department of Cosmetic Science and Management, Mackay Medicine, Nursing and Management College, Taipei, Republic of China
| | | | | | | | | | | | | |
Collapse
|
81
|
Lao G, Yan L, Yang C, Zhang L, Zhang S, Zhou Y. Controlled release of epidermal growth factor from hydrogels accelerates wound healing in diabetic rats. J Am Podiatr Med Assoc 2012; 102:89-98. [PMID: 22461265 DOI: 10.7547/1020089] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
BACKGROUND We sought to develop new recombinant human epidermal growth factor (rhEGF)-containing hydrogels and to investigate their biological activity and therapeutic effects on wound healing in diabetic rats. METHODS Levels of rhEGF released from hydrogels were measured by enzyme-linked immunosorbent assay. The cellular proliferating activity of released rhEGF was evaluated by MTT assay. Fifty-six wounded diabetic rats were randomly divided into four groups with different topical treatment daily. The therapeutic effects were evaluated by wound area measurement, histologic analysis, immunohistochemical assessment of proliferating cell nuclear antigen and B-cell lymphoma/leukemia-2, and Western blotting of EGF receptor. RESULTS The rhEGF released from the hydrogel matrix kept its bioactivity on stimulating proliferation of the BALB/c3T3 cell line. Wound closure rates on postoperative day 14 were 75.8% in the negative control group, 82.83% in the group treated with hydrogel matrix, 85.87% in the group treated with rhEGF-containing hydrogel, and 81.18% in the group treated with rhEGF solution. Compared with hydrogel matrix, rhEGF-containing hydrogel had an additional effect on induction of EGF receptor expression (P < .05). Compared with negative controls, protein expression of B-cell lymphoma/leukemia-2 was higher in the rhEGF-containing groups (P < .05). Proliferating cell nuclear antigen was induced at its highest level on day 7 in the rhEGF-containing hydrogel-treated group (P < .05). CONCLUSIONS These data from in vitro release and diabetic animal models highlight the efficacy of hydrogels as a controlled releasing system for topical application of EGFs. The rhEGF-containing hydrogel we developed holds the merits of prolonged and sustained releasing of bioactive rhEGF and therapeutic potential in enhancing diabetic wound healing.
Collapse
Affiliation(s)
- Guojuan Lao
- Department of Endocrinology and Metabolism, The Second Affiliated Hospital, SUN Yat-sen University, Guangzhou, China
| | | | | | | | | | | |
Collapse
|
82
|
Wright B, Mi S, Connon CJ. Towards the use of hydrogels in the treatment of limbal stem cell deficiency. Drug Discov Today 2012; 18:79-86. [PMID: 22846850 PMCID: PMC4046643 DOI: 10.1016/j.drudis.2012.07.012] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2012] [Revised: 06/27/2012] [Accepted: 07/20/2012] [Indexed: 12/13/2022]
Abstract
Corneal blindness caused by limbal stem cell deficiency (LSCD) is a prevailing disorder worldwide. Clinical outcomes for LSCD therapy using amniotic membrane (AM) are unpredictable. Hydrogels can eliminate limitations of standard therapy for LSCD, because they present all the advantages of AM (i.e. biocompatibility, inertness and a biodegradable structure) but unlike AM, they are structurally uniform and can be easily manipulated to alter mechanical and physical properties. Hydrogels can be delivered with minimum trauma to the ocular surface and do not require extensive serological screening before clinical application. The hydrogel structure is also amenable to modifications which direct stem cell fate. In this focussed review we highlight hydrogels as biomaterial substrates which may replace and/or complement AM in the treatment of LSCD.
Collapse
Affiliation(s)
- Bernice Wright
- University of Reading, School of Pharmacy, Reading, Berkshire, RG6 6UB, UK
| | | | | |
Collapse
|
83
|
Princz M, Sheardown H. Heparin-modified dendrimer crosslinked collagen matrices for the delivery of heparin-binding epidermal growth factor. J Biomed Mater Res A 2012; 100:1929-37. [DOI: 10.1002/jbm.a.34128] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2011] [Revised: 02/06/2012] [Accepted: 02/07/2012] [Indexed: 01/23/2023]
|
84
|
Tığlı RS, Kazaroğlu NM, Mavış B, Gümüşderelioğlu M. Cellular Behavior on Epidermal Growth Factor (EGF)-Immobilized PCL/Gelatin Nanofibrous Scaffolds. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 22:207-23. [DOI: 10.1163/092050609x12591500475424] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- R. Seda Tığlı
- a Hacettepe University, Chemical Engineering Department, 06800, Beytepe, Ankara, Turkey
| | - N. Merve Kazaroğlu
- b Başkent University, Biomedical Engineering Department, 06810, Bağlıca, Ankara, Turkey
| | - Bora Mavış
- c Hacetepe University, Mechanical Engineering Department, 06800, Beytepe, Ankara, Turkey
| | | |
Collapse
|
85
|
Yang Z, Xu LS, Yin F, Shi YQ, Han Y, Zhang L, Jin HF, Nie YZ, Wang JB, Hao X, Fan DM, Zhou XM. In vitro and in vivo characterization of silk fibroin/gelatin composite scaffolds for liver tissue engineering. J Dig Dis 2012; 13:168-178. [PMID: 22356312 DOI: 10.1111/j.1751-2980.2011.00566.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVE To investigate the cytotoxicity of silk fibroin/gelatin (SF/G) composite scaffolds in vitro as well as their biocompatibility and degradation in vivo. METHODS The proliferation and relative growth rate of human hepatic QZG cells grown on different blends of two-dimensional (2-D) SF/G scaffolds were assessed using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Flow cytometry was used to evaluate apoptotic rate of QZG cells on different blends of 2-D SF/G scaffolds. The effect of silk protein materials on cell growth was observed by scanning electron microscopy. Three-dimensional (3-D) SF/G scaffolds of three different ratios (diameter 10 mm, thickness 1 mm) were implanted into subcutaneous pockets on male Sprague-Dawley (SD) rats. On the 7th, 14th and 30th day post-implantation, the rats were sacrificed. The scaffold area including the surrounding tissues was retrieved. Hematoxylin and eosin staining was performed for observation under a light microscope. RESULTS Significant cell attachment and proliferation on the SF/G scaffolds were observed. As the increased gelatin concentration, SF/G scaffolds became more amenable to cell adhesion. After the subcutaneous implantation of the SF/G scaffolds in SD rats, immunological rejection tests showed only slight inflammation, measured by the presence of inflamed cells on day 7 and 14. By day 30, each scaffold had been completely infiltrated and organized by fibroblasts and inflamed cells. The greater the gelatin concentration in the scaffold, the faster the degradation rate. CONCLUSION Composite SF/G scaffolds are a promising candidate matrix for implantable bio-artificial livers.
Collapse
Affiliation(s)
- Zhao Yang
- State Key Laboratory of Cancer Biology and Institute of Gastroenterology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University
| | - Li Sha Xu
- State Key Laboratory of Cancer Biology and Institute of Gastroenterology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University
| | - Fang Yin
- State Key Laboratory of Cancer Biology and Institute of Gastroenterology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University
| | - Yong Quan Shi
- State Key Laboratory of Cancer Biology and Institute of Gastroenterology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University
| | - Ying Han
- State Key Laboratory of Cancer Biology and Institute of Gastroenterology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University
| | - Lin Zhang
- State Key Laboratory of Cancer Biology and Institute of Gastroenterology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University
| | - Hai Feng Jin
- State Key Laboratory of Cancer Biology and Institute of Gastroenterology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University
| | - Yong Zhan Nie
- State Key Laboratory of Cancer Biology and Institute of Gastroenterology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University
| | - Jing Bo Wang
- State Key Laboratory of Cancer Biology and Institute of Gastroenterology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University
| | - Xing Hao
- State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi Province, China
| | - Dai Ming Fan
- State Key Laboratory of Cancer Biology and Institute of Gastroenterology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University
| | - Xin Min Zhou
- State Key Laboratory of Cancer Biology and Institute of Gastroenterology, Xijing Hospital of Digestive Diseases, The Fourth Military Medical University
| |
Collapse
|
86
|
A gelatin-g-poly(N-isopropylacrylamide) biodegradable in situ gelling delivery system for the intracameral administration of pilocarpine. Biomaterials 2011; 33:2372-87. [PMID: 22182746 DOI: 10.1016/j.biomaterials.2011.11.085] [Citation(s) in RCA: 91] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2011] [Accepted: 11/28/2011] [Indexed: 12/22/2022]
Abstract
In this study, the aminated gelatin was grafted with carboxylic end-capped poly(N-isopropylacrylamide) (PN) via a carbodiimide-mediated coupling reaction to fabricate biodegradable in situ forming delivery systems for intracameral administration of antiglaucoma medications. The chemical structure of the graft copolymers (GN) was confirmed by Fourier transform infrared (FTIR) spectroscopy. When the feed molar ratio of NH(2)/COOH was 0.36, the grafting ratio, efficiency and degree of grafting, and weight ratio of PN to aminated gelatin was 25.6, 18.6%, 52.6%, and 1.9, respectively. As compared to PN, the GN samples possessed better thermal gelation ability and adherence, indicating remarkable phase transition properties. Under gelatinase degradation, the remaining weight of GN was significantly lower than those of PN at each time point from 8 h to 4 weeks. Cytocompatibility studies showed that the culture of anterior segment cells with both in situ forming gels does not affect proliferation and has little effect on inflammation. Higher encapsulation efficiency (~62%) and cumulative release (~95%) were achieved for GN vehicles, which was attributed to initial fast temperature triggered capture of pilocarpine and subsequent progressive degradation of gelatin network. In a rabbit glaucoma model, the performance of delivery carriers was evaluated by biomicroscopy, intraocular pressure (IOP), and pupil size change. Intracameral administration of pilocarpine using GN was found to be more effective than other methods such as instillation of eye drop and injection of free drug or PN containing drug in improving ocular bioavailability and extending the pharmacological responses (i.e., miosis and IOP lowering effect and preservation of corneal endothelial cell density).
Collapse
|
87
|
Injectable fibroblast growth factor-2 coacervate for persistent angiogenesis. Proc Natl Acad Sci U S A 2011; 108:13444-9. [PMID: 21808045 DOI: 10.1073/pnas.1110121108] [Citation(s) in RCA: 129] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Enhancing the maturity of the newly formed blood vessels is critical for the success of therapeutic angiogenesis. The maturation of vasculature relies on active participation of mural cells to stabilize endothelium and a basal level of relevant growth factors. We set out to design and successfully achieved robust angiogenesis using an injectable polyvalent coacervate of a polycation, heparin, and fibroblast growth factor-2 (FGF2). FGF2 was loaded into the coacervate at nearly 100% efficiency. In vitro assays demonstrated that the matrix protected FGF2 from proteolytic degradations. FGF2 released from the coacervate was more effective in the differentiation of endothelial cells and chemotaxis of pericytes than free FGF2. One injection of 500 ng of FGF2 in the coacervate elicited comprehensive angiogenesis in vivo. The number of endothelial and mural cells increased significantly, and the local tissue contained more and larger blood vessels with increased circulation. Mural cells actively participated during the whole angiogenic process: Within 7 d of the injection, pericytes were recruited to close proximity of the endothelial cells. Mature vasculature stabilized by vascular smooth muscle cells persisted till at least 4 wk. On the other hand, bolus injection of an identical amount of free FGF2 induced weak angiogenic responses. These results demonstrate the potential of polyvalent coacervate as a new controlled delivery platform.
Collapse
|
88
|
Uchida Y, Murakami Y. Successful preferential formation of a novel macromolecular assembly—Trilayered polymeric micelle—That can incorporate hydrophilic compounds: The optimization of factors affecting the micelle formation from amphiphilic block copolymers. Colloids Surf B Biointerfaces 2011; 84:346-53. [DOI: 10.1016/j.colsurfb.2011.01.025] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2010] [Revised: 01/16/2011] [Accepted: 01/17/2011] [Indexed: 11/28/2022]
|
89
|
Brief treatment with heparin-binding EGF-like growth factor, but not with EGF, is sufficient to accelerate epithelial wound healing. Biochim Biophys Acta Gen Subj 2011; 1810:875-8. [PMID: 21640162 DOI: 10.1016/j.bbagen.2011.05.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2010] [Revised: 05/17/2011] [Accepted: 05/18/2011] [Indexed: 11/21/2022]
Abstract
BACKGROUND Heparin-binding EGF-like growth factor (HB-EGF) contains, in contrast to EGF, a domain that binds to negatively charged glycans on cell surfaces and in extracellular matrix. We speculated that a short exposure to HB-EGF induces prolonged biological effects such as healing of wounds after immobilization in tissues. METHODS Epithelial cell sheets in tissue and corneas in organ culture were treated briefly with HB-EGF or EGF and binding of the growth factors, time course of activation of the EGF receptor, and healing of wounds were compared. RESULTS Treating human corneal epithelial cells for 2 min with HB-EGF resulted in 8h of detectable activation of the EGF receptor, but activation was much shorter after EGF treatment. A brief treatment with HB-EGF, but not with EGF, induced significant acceleration of healing in wounds in epithelial sheets in tissue and organ culture. Bound HB-EGF was detectable up to 16 h after brief treatments. Neutralizing antibodies added after HB-EGF treatment blocked acceleration of healing, demonstrating the role of bound HB-EGF in accelerating healing. CONCLUSIONS A brief exposure to HB-EGF, but not to EGF, is sufficient to induce prolonged activation of the EGF receptor and to enhance healing. GENERAL SIGNIFICANCE Bound HB-EGF can serve as a pool that induces prolonged activation of the EGF receptor. EGF has been used experimentally to treat poorly healing wounds, but the frequent applications that are necessary have hampered its use clinically. The findings imply that HB-EGF may be a useful long-acting alternative to EGF.
Collapse
|
90
|
Zhou W, Zhao M, Zhao Y, Mou Y. A fibrin gel loaded with chitosan nanoparticles for local delivery of rhEGF: preparation and in vitro release studies. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2011; 22:1221-30. [PMID: 21445654 DOI: 10.1007/s10856-011-4304-9] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2010] [Accepted: 03/21/2011] [Indexed: 05/24/2023]
Abstract
Recombinant human epidermal growth factor (rhEGF) is known to stimulate cell proliferation and accelerate wound healing. Direct delivery of rhEGF at the wound site in a sustained and controllable way without loss of bioactivity would enhance its biological effects. The aim of this study was to prepare a novel local delivery system for the sustained and controllable release of rhEGF, a fibrin gel loaded with chitosan nanoparticles. First, rhEGF-loaded chitosan nanoparticles were prepared and characterized, and these showed an ability to protect rhEGF from proteolysis. The prepared nanoparticles were then incorporated into a fibrin gel matrix during polymerization. In vitro release studies showed that the fibrin gel loaded with rhEGF/chitosan nanoparticles could achieve a more sustained release of rhEGF than either chitosan nanoparticles or an unloaded fibrin gel. Additionally, the release rate could be controlled by altering the contents of fibrinogen and thrombin in this composite delivery system. The bioactivity of the released rhEGF was determined by assessing its ability to stimulate the proliferation of BALB/c 3T3 cells, and the results showed that rhEGF bioactivity was not affected during the preparation process and could be maintained for at least 7 days. This novel delivery system may have great potential applications in the local administration of rhEGF.
Collapse
Affiliation(s)
- Wenjun Zhou
- Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, The First Affiliated Hospital of Chongqing Medical University, No. 1, Youyi Road, Yu Zhong District, Chongqing, 400016, China
| | | | | | | |
Collapse
|
91
|
Zhang Z, Zhao M, Wang J, Ding Y, Dai X, Li Y. Oral administration of skin gelatin isolated from Chum salmon (Oncorhynchus keta) enhances wound healing in diabetic rats. Mar Drugs 2011; 9:696-711. [PMID: 21673883 PMCID: PMC3111176 DOI: 10.3390/md9050696] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2011] [Revised: 04/12/2011] [Accepted: 04/18/2011] [Indexed: 01/13/2023] Open
Abstract
Care for diabetic wounds remains a significant clinical problem. The present study was aimed at investigating the effect of skin gelatin from Chum Salmon on defective wound repair in the skin of diabetic rats. Full-thickness excisional skin wounds were made in 48 rats, of which 32 were diabetes. The diabetic rats were orally treated daily for 14 days with skin gelatin from Chum Salmon (2 g/kg) or its vehicle. Sixteen non-diabetic control rats received the same amount of water as vehicle-treated non-diabetic rats. Rats were killed to assess the rate of wound closure, microvessel density (MVD), vascular endothelial growth factor (VEGF), hydroxyproline (HP) contents in wound tissues and nitrate in plasma and wound tissue at 7 and 14 days after wounding. Skin gelatin-treated diabetic rats showed a better wound closure, increased MVD, VEGF, hyproxyproline and NO contents and a reduced extent of inflammatory response. All parameters were significant (P < 0.05) in comparison to vehicle-treated diabetic group. In light of our finding that skin gelatin of Chum Salmon promotes skin wound repair in diabetic rats, we propose that oral administration of Chum Salmon skin gelatin might be a beneficial method for treating wound disorders associated with diabetes.
Collapse
Affiliation(s)
| | | | | | | | | | - Yong Li
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +86-10-82801177; Fax: +86-10-82801177
| |
Collapse
|
92
|
Watanabe M, Li H, Roybal J, Santore M, Radu A, Jo JI, Kaneko M, Tabata Y, Flake A. A Tissue Engineering Approach for Prenatal Closure of Myelomeningocele: Comparison of Gelatin Sponge and Microsphere Scaffolds and Bioactive Protein Coatings. Tissue Eng Part A 2011; 17:1099-110. [DOI: 10.1089/ten.tea.2010.0390] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Miho Watanabe
- The Department of Surgery and Children's Center for Fetal Research, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
- Department of Pediatric Surgery, University of Tsukuba, Graduate School of Comprehensive Human Sciences and Clinical Sciences, Tsukuba, Japan
| | - Hiaying Li
- The Department of Surgery and Children's Center for Fetal Research, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Jessica Roybal
- The Department of Surgery and Children's Center for Fetal Research, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Matthew Santore
- The Department of Surgery and Children's Center for Fetal Research, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Antonetta Radu
- The Department of Surgery and Children's Center for Fetal Research, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Jun-Ichiro Jo
- Department of Biomaterials, Institute for Frontier Medical Sciences, Kyoto, Japan
| | - Michio Kaneko
- Department of Pediatric Surgery, University of Tsukuba, Graduate School of Comprehensive Human Sciences and Clinical Sciences, Tsukuba, Japan
| | - Yasuhiko Tabata
- Department of Biomaterials, Institute for Frontier Medical Sciences, Kyoto, Japan
| | - Alan Flake
- The Department of Surgery and Children's Center for Fetal Research, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| |
Collapse
|
93
|
Vasconcelos A, Cavaco-Paulo A. Wound dressings for a proteolytic-rich environment. Appl Microbiol Biotechnol 2011; 90:445-60. [DOI: 10.1007/s00253-011-3135-4] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2010] [Revised: 01/17/2011] [Accepted: 01/17/2011] [Indexed: 11/28/2022]
|
94
|
LoPresti C, Vetri V, Ricca M, Foderà V, Tripodo G, Spadaro G, Dispenza C. Pulsatile protein release and protection using radiation-crosslinked polypeptide hydrogel delivery devices. REACT FUNCT POLYM 2011. [DOI: 10.1016/j.reactfunctpolym.2010.11.030] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
95
|
Nishida A, Yamada M, Kanazawa T, Takashima Y, Ouchi K, Okada H. Sustained-release of protein from biodegradable sericin film, gel and sponge. Int J Pharm 2011; 407:44-52. [PMID: 21238562 DOI: 10.1016/j.ijpharm.2011.01.006] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2010] [Revised: 10/24/2010] [Accepted: 01/07/2011] [Indexed: 10/18/2022]
Abstract
A silk protein, sericin, contains 18 kinds of amino acids, mostly polar side chains forming a complex of three principal polypeptides. The major polypeptides exhibit hydrophobic characteristics by forming a β-sheet structure in a hydrate state. As a drug-releasing biomaterial made by an aqueous process without using any cross linker, sericin is expected to form various hydrophobic dosage forms. However, its dosage form, with respect to the molecular weight and concentration of sericin, and its biodegradation behavior has not been studied in detail. In this study, the film, gel and sponge of sericin were prepared and examined to determine the release properties of the charged protein, fluorescein isothiocyanate-albumin (FA). The film and gel, as solid and semisolid forms, respectively, were also evaluated for their biodegradation behavior. For in vitro release, FA was sustained-released from these preparations. The concentration and dosage form markedly affected FA release. For in vivo biodegradation, the sericin preparations implanted subcutaneously in rats gradually decreased in size and weight. Histological examination indicated no marked inflammation at the site. As for in vivo release, FA remained for 3-6 weeks or more in rats. These findings suggest that sericin is suitable for use as a drug-releasing biomaterial.
Collapse
Affiliation(s)
- Ayumu Nishida
- Pharmaceutical Technology Laboratories, Kissei Pharmaceutical Co., Ltd., 4365-1 Kashiwabara, Hotaka, Azumino 399-8304, Japan.
| | | | | | | | | | | |
Collapse
|
96
|
Angiogenesis induced by controlled release of neuropeptide substance P. Biomaterials 2010; 31:8617-25. [DOI: 10.1016/j.biomaterials.2010.07.079] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2010] [Accepted: 07/21/2010] [Indexed: 11/20/2022]
|
97
|
Kim MS, Shin YM, Lee JH, Kim SI, Nam YS, Shin CS, Shin H. Release kinetics and in vitro bioactivity of basic fibroblast growth factor: effect of the thickness of fibrous matrices. Macromol Biosci 2010; 11:122-30. [PMID: 20886548 DOI: 10.1002/mabi.201000222] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2010] [Revised: 07/21/2010] [Indexed: 02/06/2023]
Abstract
In this study, we fabricated non-woven matrices using blends of polycaprolactone and gelatin with various spinning volumes to control the immobilized heparin content, which was ultimately intended to increase the immobilization efficiency of bFGF. The amount of bFGF on the heparin conjugated fibrous matrices depended on the thicknesses of the swollen matrices ranging from 35.4 ± 6.5 to 162.3 ± 14.0 ng and ≈90% of the bFGF was gradually released over a period of up to 56 d. The released bFGF enhanced the proliferation of human umbilical vein endothelial cells and human mesenchymal stem cells. In conclusion, our heparin-conjugated fibrous matrices have the potential to be used as a growth factor delivery system in tissue engineering applications.
Collapse
Affiliation(s)
- Min Sup Kim
- Department of Biomedical Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, Korea
| | | | | | | | | | | | | |
Collapse
|
98
|
Xu XD, Liang L, Chen CS, Lu B, Wang NL, Jiang FG, Zhang XZ, Zhuo RX. Peptide hydrogel as an intraocular drug delivery system for inhibition of postoperative scarring formation. ACS APPLIED MATERIALS & INTERFACES 2010; 2:2663-71. [PMID: 20707334 DOI: 10.1021/am100484c] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
A biocompatible hydrogel self-assembled from a peptide comprised of a peptide backbone containing Arg-Gly-Asp (RGD) sequence and a hydrophobic N-fluorenyl-9-methoxycarbonyl (FMOC) tail was designed and prepared to load antiproliferative model drug (5-fluorouracil, 5-Fu). After administering this 5-Fu-loaded peptide hydrogel in the filtering surgery of rabbit eyes, because of the sustained release of 5-Fu from the hydrogel to inhibit the scleral flap fibrosis efficiently, the pathology and immunohistochemistry demonstrate that the filtration fistula is patent without postoperative scarring formation, resulting in the significantly low intraocular pressure (IOP) of the rabbit eyes within postoperative 28 days. In a comparison with the conventional 5-Fu exposure, the strategy demonstrated here presents several advantages including providing convenience and preventing the toxicity of 5-Fu to the surrounding ocular tissues efficiently, suggesting a feasibility of this peptide hydrogel as a potential implanted drug delivery system for the inhibition of postoperative scarring formation.
Collapse
Affiliation(s)
- Xiao-Ding Xu
- Key Laboratory of Biomedical Polymers of Ministry of Education & Department of Chemistry, Wuhan University, and Department of Ophthalmology, The Central Hospital of Wuhan, Wuhan 430014, PR China
| | | | | | | | | | | | | | | |
Collapse
|
99
|
Choi JS, Yoo HS. Pluronic/chitosan hydrogels containing epidermal growth factor with wound-adhesive and photo-crosslinkable properties. J Biomed Mater Res A 2010; 95:564-73. [DOI: 10.1002/jbm.a.32848] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
100
|
Uchida Y, Murakami Y. Trilayered polymeric micelle: A newly developed macromolecular assembly that can incorporate hydrophilic compounds. Colloids Surf B Biointerfaces 2010; 79:198-204. [DOI: 10.1016/j.colsurfb.2010.03.047] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2010] [Revised: 03/28/2010] [Accepted: 03/31/2010] [Indexed: 10/19/2022]
|