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Kang MS, Park R, Jo HJ, Shin YC, Kim CS, Hyon SH, Hong SW, Oh J, Han DW. Spontaneous Osteogenic Differentiation of Human Mesenchymal Stem Cells by Tuna-Bone-Derived Hydroxyapatite Composites with Green Tea Polyphenol-Reduced Graphene Oxide. Cells 2023; 12:1448. [PMID: 37296569 PMCID: PMC10252354 DOI: 10.3390/cells12111448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 05/15/2023] [Accepted: 05/16/2023] [Indexed: 06/12/2023] Open
Abstract
In recent years, bone tissue engineering (BTE) has made significant progress in promoting the direct and functional connection between bone and graft, including osseointegration and osteoconduction, to facilitate the healing of damaged bone tissues. Herein, we introduce a new, environmentally friendly, and cost-effective method for synthesizing reduced graphene oxide (rGO) and hydroxyapatite (HAp). The method uses epigallocatechin-3-O-gallate (EGCG) as a reducing agent to synthesize rGO (E-rGO), and HAp powder is obtained from Atlantic bluefin tuna (Thunnus thynnus). The physicochemical analysis indicated that the E-rGO/HAp composites had exceptional properties for use as BTE scaffolds, as well as high purity. Moreover, we discovered that E-rGO/HAp composites facilitated not only the proliferation, but also early and late osteogenic differentiation of human mesenchymal stem cells (hMSCs). Our work suggests that E-rGO/HAp composites may play a significant role in promoting the spontaneous osteogenic differentiation of hMSCs, and we envision that E-rGO/HAp composites could serve as promising candidates for BTE scaffolds, stem-cell differentiation stimulators, and implantable device components because of their biocompatible and bioactive properties. Overall, we suggest a new approach for developing cost-effective and environmentally friendly E-rGO/HAp composite materials for BTE application.
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Affiliation(s)
- Moon Sung Kang
- Department of Cogno-Mechatronics Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan 46241, Republic of Korea; (M.S.K.); (R.P.); (H.J.J.); (C.-S.K.)
| | - Rowoon Park
- Department of Cogno-Mechatronics Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan 46241, Republic of Korea; (M.S.K.); (R.P.); (H.J.J.); (C.-S.K.)
| | - Hyo Jung Jo
- Department of Cogno-Mechatronics Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan 46241, Republic of Korea; (M.S.K.); (R.P.); (H.J.J.); (C.-S.K.)
| | - Yong Cheol Shin
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA;
| | - Chang-Seok Kim
- Department of Cogno-Mechatronics Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan 46241, Republic of Korea; (M.S.K.); (R.P.); (H.J.J.); (C.-S.K.)
- Engineering Research Center for Color-Modulated Extra-Sensory Perception Technology, Pusan National University, Busan 46241, Republic of Korea
| | | | - Suck Won Hong
- Department of Cogno-Mechatronics Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan 46241, Republic of Korea; (M.S.K.); (R.P.); (H.J.J.); (C.-S.K.)
- Engineering Research Center for Color-Modulated Extra-Sensory Perception Technology, Pusan National University, Busan 46241, Republic of Korea
| | - Junghwan Oh
- Industry 4.0 Convergence Bionics Engineering, Pukyong National University, Busan 48513, Republic of Korea
- Department of Biomedical Engineering, Pukyong National University, Busan 48513, Republic of Korea
- Ohlabs Corporation, Busan 48513, Republic of Korea
| | - Dong-Wook Han
- Department of Cogno-Mechatronics Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan 46241, Republic of Korea; (M.S.K.); (R.P.); (H.J.J.); (C.-S.K.)
- BIO-IT Fusion Technology Research Institute, Pusan National University, Busan 46241, Republic of Korea
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Hasegawa H, Takeshita N, Hyon W, Hyon SH, Ito M. Novel external reinforcement device for gastrointestinal anastomosis in an experimental study. BMC Surg 2023; 23:121. [PMID: 37170107 PMCID: PMC10176862 DOI: 10.1186/s12893-023-02027-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 05/04/2023] [Indexed: 05/13/2023] Open
Abstract
BACKGROUND Anastomotic leakage has been reported to occur when the load on the anastomotic site exceeds the resistance created by sutures, staples, and early scars. It may be possible to avoid anastomotic leakage by covering and reinforcing the anastomotic site with a biocompatible material. The aim of this study was to evaluate the safety and feasibility of a novel external reinforcement device for gastrointestinal anastomosis in an experimental model. METHODS A single pig was used in this non-survival study, and end-to-end anastomoses were created in six small bowel loops by a single-stapling technique using a circular stapler. Three of the six anastomoses were covered with a novel external reinforcement device. Air was injected, a pressure test of each anastomosis was performed, and the bursting pressure was measured. RESULTS Reinforcement of the anastomotic site with the device was successfully performed in all anastomoses. The bursting pressure was 76.1 ± 5.7 mmHg in the control group, and 126.8 ± 6.8 mmHg in the device group, respectively. The bursting pressure in the device group was significantly higher than that in the control group (p = 0.0006). CONCLUSIONS The novel external reinforcement device was safe and feasible for reinforcing the anastomoses in the experimental model.
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Affiliation(s)
- Hiro Hasegawa
- Department of Colorectal Surgery, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan
- Surgical Device Innovation Office, NEXT medical device innovation center, National Cancer Center Hospital East, Kashiwa, Japan
| | - Nobuyoshi Takeshita
- Department of Colorectal Surgery, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan
- Surgical Device Innovation Office, NEXT medical device innovation center, National Cancer Center Hospital East, Kashiwa, Japan
| | | | | | - Masaaki Ito
- Department of Colorectal Surgery, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan.
- Surgical Device Innovation Office, NEXT medical device innovation center, National Cancer Center Hospital East, Kashiwa, Japan.
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Jin H, Choi W, Matsumura K, Hyon SH, Gen Y, Hayashi M, Kawabata T, Ijiri M, Miyoshi K. Improved fertility of frozen-thawed porcine spermatozoa with 3,3-dimethylglutaric anhydride poly-L-lysine as a novel cryoprotectant. Anim Sci J 2023; 94:e13821. [PMID: 36866922 DOI: 10.1111/asj.13821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 01/25/2023] [Accepted: 02/13/2023] [Indexed: 03/04/2023]
Abstract
In this study, we determined the efficacy of 3,3-dimethylglutaric anhydride poly-L-lysine (DMGA-PLL) as a cryoprotectant for porcine spermatozoa. Porcine spermatozoa were cryopreserved in a freezing extender containing 3% (v/v) glycerol and various concentrations of DMGA-PLL. At 12 h after thawing, the motility index of spermatozoa cryopreserved with 0.25% (v/v) DMGA-PLL (25.9) was significantly (P < 0.01) higher than that of spermatozoa cryopreserved with 0%, 0.125%, or 0.5% DMGA-PLL (10.0-16.3). In addition, the blastocyst formation rate of embryos derived from spermatozoa cryopreserved with 0.25% DMGA-PLL (22.8%) was significantly (P < 0.01) higher than that of embryos derived from spermatozoa cryopreserved with 0%, 0.125%, or 0.5% DMGA-PLL (7.9%-10.9%). The mean number of total piglets born to sows inseminated with spermatozoa cryopreserved without DMGA-PLL (9.0) was significantly (P < 0.05) lower than that of total piglets born to sows inseminated with spermatozoa stored at 17°C (13.8). However, when spermatozoa cryopreserved with 0.25% DMGA-PLL were used for artificial insemination, the mean number of total piglets (11.7) was not significantly different from that obtained following artificial insemination using spermatozoa stored at 17°C. The results showed the usefulness of DMGA-PLL as a cryoprotectant in the cryopreservation of porcine spermatozoa.
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Affiliation(s)
- Hansol Jin
- Laboratory of Animal Reproduction, Faculty of Agriculture, Kagoshima University, Kagoshima, Japan
| | - Wooyoon Choi
- Laboratory of Animal Reproduction, Faculty of Agriculture, Kagoshima University, Kagoshima, Japan
| | - Kazuaki Matsumura
- School of Materials Science, Japan Advanced Institute of Science and Technology, Nomi, Japan
| | | | - Yuki Gen
- BioVerde Incorporated, Kyoto, Japan
| | | | - Tadahiro Kawabata
- Section of Swine, Kagoshima Prefectural Economics Federation of Agricultural Cooperatives, Kagoshima, Japan
| | - Moe Ijiri
- Transboundary Animal Diseases Research Center, Joint Faculty of Veterinary Medicine, Kagoshima University, Kagoshima, Japan
| | - Kazuchika Miyoshi
- Laboratory of Animal Reproduction, Faculty of Agriculture, Kagoshima University, Kagoshima, Japan.,The United Graduate School of Agricultural Sciences, Kagoshima University, Kagoshima, Japan
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Hyon W, Hyon SH, Matsumura K. Evaluation of the optimal dose for maximizing the anti-adhesion performance of a self-degradable dextran-based material. Carbohydrate Polymer Technologies and Applications 2022. [DOI: 10.1016/j.carpta.2022.100255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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Jin H, Choi W, Matsumura K, Hyon SH, Gen Y, Hayashi M, Kawabata T, Ijiri M, Miyoshi K. Cryopreservation of pig spermatozoa using carboxylated poly-L-lysine as cryoprotectant. J Reprod Dev 2022; 68:312-317. [PMID: 35908977 DOI: 10.1262/jrd.2022-058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In this study, we cryopreserved pig spermatozoa using carboxylated poly-L-lysine (CPLL) as the cryoprotectant to determine its efficacy. Pig spermatozoa were placed in a freezing extender containing 3% (v/v) glycerol and different CPLL concentrations. The motility indices of the spermatozoa cryopreserved with 0.25% (v/v) CPLL at 6 (59.3), 9 (53.7), and 12 (26.2) h after thawing were significantly higher (P < 0.01 or P < 0.05) than those of the spermatozoa cryopreserved without CPLL (53.7, 40.1, and 17.5 at 6, 9, and 12 h after thawing, respectively). The concentration of CPLL in the freezing extender did not affect the ability of frozen-thawed spermatozoa to fertilize oocytes in vitro. However, the blastocyst formation rate of embryos derived from spermatozoa cryopreserved with 0.25% CPLL (24.6%) was significantly higher (P < 0.01) than that of embryos derived from spermatozoa cryopreserved without CPLL (11.2%). The conception rate of the sows inseminated with spermatozoa cryopreserved with 0.25% CPLL (72.2%) was not significantly different from that of the sows inseminated with spermatozoa stored at 17°C (81.3%). However, the mean number of total piglets born to the former (10.0) was significantly lower (P < 0.05) than that of total piglets born to the latter (13.4). The results showed that CPLL in the freezing extender maintained the motility of frozen-thawed pig spermatozoa and improved the in vitro development of embryos produced by in vitro fertilization. In addition, we have demonstrated that piglets could be obtained with artificial insemination using spermatozoa cryopreserved with CPLL.
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Affiliation(s)
- Hansol Jin
- Laboratory of Animal Reproduction, Faculty of Agriculture, Kagoshima University, Kagoshima 890-0065, Japan
| | - Wooyoon Choi
- Laboratory of Animal Reproduction, Faculty of Agriculture, Kagoshima University, Kagoshima 890-0065, Japan
| | - Kazuaki Matsumura
- School of Materials Science, Japan Advanced Institute of Science and Technology, Ishikawa 923-1292, Japan
| | | | - Yuki Gen
- BioVerde Incorporated, Kyoto 601-8023, Japan
| | | | - Tadahiro Kawabata
- Section of Swine, Kagoshima Prefectural Economics Federation of Agricultural Cooperatives, Kagoshima 890-8515, Japan
| | - Moe Ijiri
- Transboundary Animal Diseases Research Center, Joint Faculty of Veterinary Medicine, Kagoshima University, Kagoshima 890-0065, Japan
| | - Kazuchika Miyoshi
- Laboratory of Animal Reproduction, Faculty of Agriculture, Kagoshima University, Kagoshima 890-0065, Japan
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Ota A, Hyon SH, Sumi S, Matsumura K. Gene expression analysis of human induced pluripotent stem cells cryopreserved by vitrification using StemCell Keep. Biochem Biophys Rep 2021; 28:101172. [PMID: 34825070 PMCID: PMC8605251 DOI: 10.1016/j.bbrep.2021.101172] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 11/03/2021] [Accepted: 11/10/2021] [Indexed: 01/11/2023] Open
Abstract
In recent years, regenerative medicine research using human somatic and induced pluripotent stem cells has advanced considerably, promoting clinical applications. However, it is essential that these cells are cryopreserved safely and effectively. Most cryopreservation solution agents contain dimethyl sulfoxide (DMSO), which exhibits strong toxicity and can potentially promote cell differentiation. Hence, it is important to explore substitutes for DMSO in cryoprotectant solutions. One such alternative is StemCell Keep (SCK), a DMSO-free solution that has been reported to effectively cryopreserve human induced pluripotent stem cells (hiPS cells). To clarify the effect of cryopreservation agents on cells, DNA microarray analysis is useful, as it can identify a large number of gene expression differences in cryopreserved cells, as well as functional increases in gene groups. In this study, we performed gene expression analysis of SCK-cryopreserved hiPS cells using a DNA microarray gene chip. The hiPS cells vitrified with SCK or DMSO-based vitrification solutions were thawed and cultured on Matrigel under feeder-free conditions, and RNA was extracted for DNA microarray analysis. Genes obtained from DNA microarray data were classified by the keywords of Gene Ontology Biological Process Term, and their relationships were analyzed using DAVID or the GeneMANIA database. SCK-cryopreserved hiPS cells expressed several anti-apoptotic genes, as well as genes related to cell adhesion or proliferation at levels that were nearly equivalent to those of non-frozen hiPS cells. Gene enrichment analysis with selected genes of SCK-cryopreserved hiPS cells whose expression differences were superior to those of DAP-cryopreserved showed strong interactions of negative regulation of apoptotic process, cell adhesion and positive regulation of cell proliferation in DAVID analysis. We demonstrated that SCK successfully maintained the key functions of hiPS cells, including anti-apoptosis, cell adhesion, and cell proliferation, during cryopreservation.
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Affiliation(s)
| | | | - Shoichiro Sumi
- Department of Organ Reconstruction, Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Kazuaki Matsumura
- School of Materials Science, Japan Advanced Institute of Science and Technology, Nomi, Ishikawa, Japan
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Raja IS, Preeth DR, Vedhanayagam M, Hyon SH, Lim D, Kim B, Rajalakshmi S, Han DW. Polyphenols-loaded electrospun nanofibers in bone tissue engineering and regeneration. Biomater Res 2021; 25:29. [PMID: 34563260 PMCID: PMC8466400 DOI: 10.1186/s40824-021-00229-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 08/30/2021] [Indexed: 01/27/2023] Open
Abstract
Bone is a complex structure with unique cellular and molecular process in its formation. Bone tissue regeneration is a well-organized and routine process at the cellular and molecular level in humans through the activation of biochemical pathways and protein expression. Though many forms of biomaterials have been applied for bone tissue regeneration, electrospun nanofibrous scaffolds have attracted more attention among researchers with their physicochemical properties such as tensile strength, porosity, and biocompatibility. When drugs, antibiotics, or functional nanoparticles are taken as additives to the nanofiber, its efficacy towards the application gets increased. Polyphenol is a versatile green/phytochemical small molecule playing a vital role in several biomedical applications, including bone tissue regeneration. When polyphenols are incorporated as additives to the nanofibrous scaffold, their combined properties enhance cell attachment, proliferation, and differentiation in bone tissue defect. The present review describes bone biology encompassing the composition and function of bone tissue cells and exemplifies the series of biological processes associated with bone tissue regeneration. We have highlighted the molecular mechanism of bioactive polyphenols involved in bone tissue regeneration and specified the advantage of electrospun nanofiber as a wound healing scaffold. As the polyphenols contribute to wound healing with their antioxidant and antimicrobial properties, we have compiled a list of polyphenols studied, thus far, for bone tissue regeneration along with their in vitro and in vivo experimental biological results and salient observations. Finally, we have elaborated on the importance of polyphenol-loaded electrospun nanofiber in bone tissue regeneration and discussed the possible challenges and future directions in this field.
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Affiliation(s)
| | - Desingh Raj Preeth
- Chemical Biology and Nanobiotechnology Laboratory, AU-KBC Research Centre, Anna University, MIT Campus, Chromepet, Chennai, 600 044, India
| | | | | | - Dohyung Lim
- Department of Mechanical Engineering, Sejong University, Seoul, 05006, South Korea
| | - Bongju Kim
- Dental Life Science Research Institute / Innovation Research & Support Center for Dental Science, Seoul National University Dental Hospital, Seoul, 03080, South Korea.
| | - Subramaniyam Rajalakshmi
- Chemical Biology and Nanobiotechnology Laboratory, AU-KBC Research Centre, Anna University, MIT Campus, Chromepet, Chennai, 600 044, India.
| | - Dong-Wook Han
- BIO-IT Fusion Technology Research Institute, Pusan National University, Busan, 46241, South Korea. .,Department of Cogno-Mechatronics Engineering, College of Nanoscience & Nanotechnology, Pusan National University, Busan, 46241, South Korea.
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Matsumura K, Hatakeyama S, Naka T, Ueda H, Rajan R, Tanaka D, Hyon SH. Molecular Design of Polyampholytes for Vitrification-Induced Preservation of Three-Dimensional Cell Constructs without Using Liquid Nitrogen. Biomacromolecules 2020; 21:3017-3025. [PMID: 32659086 DOI: 10.1021/acs.biomac.0c00293] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Current slow-freezing methods are too inefficient for cryopreservation of three-dimensional (3D) tissue constructs. Additionally, conventional vitrification methods use liquid nitrogen, which is inconvenient and increases the chance of cross-contamination. Herein, we have developed polyampholytes with various degrees of hydrophobicity and showed that they could successfully vitrify cell constructs including spheroids and cell monolayers without using liquid nitrogen. The polyampholytes prevented ice crystallization during both cooling and warming, demonstrating their potential to prevent freezing-induced damage. Monolayers and spheroids vitrified in the presence of polyampholytes yielded high viabilities post-thawing with monolayers vitrified with PLL-DMGA exhibiting more than 90% viability. Moreover, spheroids vitrified in the presence of polyampholytes retained their fusibilities, thus revealing the propensity of these polyampholytes to stabilize 3D cell constructs. This study is expected to open new avenues for the development of off-the-shelf tissue engineering constructs that can be prepared and preserved until needed.
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Affiliation(s)
- Kazuaki Matsumura
- School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa, 923-1292, Japan
| | - Sho Hatakeyama
- School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa, 923-1292, Japan
| | - Toshiaki Naka
- Shibuya Corporation, Ko-58 Mameda-Honmachi, Kanazawa, Ishikawa, 920-8681, Japan
| | - Hiroshi Ueda
- Shibuya Corporation, Ko-58 Mameda-Honmachi, Kanazawa, Ishikawa, 920-8681, Japan
| | - Robin Rajan
- School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa, 923-1292, Japan
| | - Daisuke Tanaka
- Genetic Resources Center, National Agriculture and Food Research Organization, 212, Kannondai, Tsukuba, Ibaraki 305-8602, Japan
| | - Suong-Hyu Hyon
- The Joint Graduate School of Veterinary Medicine, Kagoshima University, Korimoto 1-21-24, Kagoshima 890-8580, Japan
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Takai F, Takeda T, Yamazaki K, Ikeda T, Hyon SH, Minatoya K, Masumoto H. Management of retrosternal adhesion after median sternotomy by controlling degradation speed of a dextran and ε-poly (L-lysine)-based biocompatible glue. Gen Thorac Cardiovasc Surg 2020; 68:793-800. [PMID: 31981138 DOI: 10.1007/s11748-020-01297-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 01/14/2020] [Indexed: 11/30/2022]
Abstract
OBJECTIVE Retrosternal adhesion after median sternotomy possibly raises the risk of cardiac injury at resternotomy. A biodegradable glue "Lydex" is composed of food additives, dextran and ε-poly (L-lysine), and the degradation speed can be controlled by the composition. In the present study, we evaluated the preventative effect of Lydex on retrosternal adhesion and the relationship between degradation speed and the progression of retrosternal fibrosis. METHODS Japanese white rabbits are subjected to median sternotomy. Lydex 1, 2 and 3 were loaded at the retrosternal space of rabbits in allocated groups before sternal closure, respectively (n = 11 for each group). Retrosternal adhesion was macroscopically evaluated after surgery. Retainment of Lydex, retrosternal fibrosis and the infiltration of macrophages are histologically evaluated, respectively. RESULTS All Lydex groups exhibited less retrosternal adhesion at 4 weeks after loading compared to unloaded control. The degradation speed of Lydex varied according to the compositions. Lydex with faster degradation (Lydex 2 or Lydex 3) showed lower progression of retrosternal fibrosis compared to that with slower degradation (Lydex 1) [fibrosis ratio: control vs Lydex 1 vs Lydex 2 vs Lydex 3: 0.60 ± 0.15 vs 0.18 ± 0.17 vs 0.00 ± 0.00 vs 0.00 ± 0.00, P = 0.0005 (Lydex 1 vs Lydex 2), P = 0.0005 (Lydex 1 vs Lydex 3)]. Retrosternal infiltrations of macrophages in Lydex 1 and Lydex 3 groups are not higher compared to that in unloaded control. CONCLUSIONS The degradation speed of Lydex could be controlled according to the compositions. The degradation speed affected the progression of retrosternal fibrosis.
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Affiliation(s)
- Fumie Takai
- Department of Cardiovascular Surgery, Graduate School of Medicine, Kyoto University, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan.,Department of Cardiovascular Surgery, Nagahama City Hospital, Nagahama, Japan
| | - Takahide Takeda
- Department of Cardiovascular Surgery, Graduate School of Medicine, Kyoto University, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Kazuhiro Yamazaki
- Department of Cardiovascular Surgery, Graduate School of Medicine, Kyoto University, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Tadashi Ikeda
- Department of Cardiovascular Surgery, Graduate School of Medicine, Kyoto University, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Suong-Hyu Hyon
- Joint Faculty of Veterinary Medicine, Kagoshima University, Kagoshima, Japan
| | - Kenji Minatoya
- Department of Cardiovascular Surgery, Graduate School of Medicine, Kyoto University, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Hidetoshi Masumoto
- Department of Cardiovascular Surgery, Graduate School of Medicine, Kyoto University, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan.
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Raja IS, Kim C, Song SJ, Shin YC, Kang MS, Hyon SH, Oh JW, Han DW. Virus-Incorporated Biomimetic Nanocomposites for Tissue Regeneration. Nanomaterials (Basel) 2019; 9:E1014. [PMID: 31311134 PMCID: PMC6669830 DOI: 10.3390/nano9071014] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 07/08/2019] [Accepted: 07/08/2019] [Indexed: 12/12/2022]
Abstract
Owing to the astonishing properties of non-harmful viruses, tissue regeneration using virus-based biomimetic materials has been an emerging trend recently. The selective peptide expression and enrichment of the desired peptide on the surface, monodispersion, self-assembly, and ease of genetic and chemical modification properties have allowed viruses to take a long stride in biomedical applications. Researchers have published many reviews so far describing unusual properties of virus-based nanoparticles, phage display, modification, and possible biomedical applications, including biosensors, bioimaging, tissue regeneration, and drug delivery, however the integration of the virus into different biomaterials for the application of tissue regeneration is not yet discussed in detail. This review will focus on various morphologies of virus-incorporated biomimetic nanocomposites in tissue regeneration and highlight the progress, challenges, and future directions in this area.
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Affiliation(s)
| | - Chuntae Kim
- Department of Nanofusion Technology, College of Nanoscience & Nanotechnology, Pusan National University, Busan 46241, Korea
| | - Su-Jin Song
- Department of Cogno-Mechatronics Engineering, College of Nanoscience & Nanotechnology, Pusan National University, Busan 46241, Korea
| | - Yong Cheol Shin
- Department of Medical Engineering, Yonsei University, College of Medicine, Seoul 03722, Korea
| | - Moon Sung Kang
- Department of Cogno-Mechatronics Engineering, College of Nanoscience & Nanotechnology, Pusan National University, Busan 46241, Korea
| | - Suong-Hyu Hyon
- Joint Faculty of Veterinary Medicine, Kagoshima University, Kagoshima 890-8580, Japan
| | - Jin-Woo Oh
- Department of Nanofusion Technology, College of Nanoscience & Nanotechnology, Pusan National University, Busan 46241, Korea.
| | - Dong-Wook Han
- Department of Cogno-Mechatronics Engineering, College of Nanoscience & Nanotechnology, Pusan National University, Busan 46241, Korea.
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Bang B, Lee E, Maeng J, Kim K, Hwang JH, Hyon SH, Hyon W, Lee DH. Efficacy of a novel endoscopically deliverable muco-adhesive hemostatic powder in an acute gastric bleeding porcine model. PLoS One 2019; 14:e0216829. [PMID: 31185029 PMCID: PMC6559629 DOI: 10.1371/journal.pone.0216829] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 04/29/2019] [Indexed: 02/07/2023] Open
Abstract
This study investigated the effectiveness of new hemostatic adhesive powder (UI-EWD) in a swine mode of acute gastric bleeding. Gastric ulcer bleeding was induced endoscopically at two locations in each of eight heparinized mini-pigs. UI-EWD and saline were sprayed endoscopically in the experimental (n = 5) and control groups (n = 3), respectively. The hemostatic effect and hydrogel persistence on ulcers were periodically evaluated endoscopically. Initial hemostasis was achieved successfully in all lesions in the experimental group. Follow-up endoscopy showed minor delayed bleeding in 10% at 6 hours in the experimental group, whereas re-bleeding was observed in 50% at 6 hours in the control group. UI-EWD gel persisted at 90%, 80%, and 50% of ulcer bases at 6, 18, and 42 hours post-application, respectively. This study suggests that muco-adhesive UI-EWD may be effective in the endoscopic treatment of active ulcer bleeding.
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Affiliation(s)
- ByoungWook Bang
- Division of Gastroenterology, Department of Internal Medicine, Inha University College of Medicine, Incheon, Republic of Korea
| | - Eunhye Lee
- Utah-Inha DDS and Advanced Therapeutics Research Center, Incheon, Republic of Korea
| | - JinHee Maeng
- Utah-Inha DDS and Advanced Therapeutics Research Center, Incheon, Republic of Korea
| | - Keunsu Kim
- Utah-Inha DDS and Advanced Therapeutics Research Center, Incheon, Republic of Korea
| | - Joo Ha Hwang
- Division of Gastroenterology and Hepatology, Stanford University School of Medicine, Palo Alto, California, United States of America
| | | | - Woogi Hyon
- BMG Incorporated, Kyoto, Japan
- School of Materials Science, Japan Advanced Institute of Science and Technology, Nomi, Ishikawa, Japan
| | - Don Haeng Lee
- Division of Gastroenterology, Department of Internal Medicine, Inha University College of Medicine, Incheon, Republic of Korea
- Utah-Inha DDS and Advanced Therapeutics Research Center, Incheon, Republic of Korea
- * E-mail:
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12
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Nonsuwan P, Matsugami A, Hayashi F, Hyon SH, Matsumura K. Controlling the degradation of an oxidized dextran-based hydrogel independent of the mechanical properties. Carbohydr Polym 2019; 204:131-141. [DOI: 10.1016/j.carbpol.2018.09.081] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Revised: 09/12/2018] [Accepted: 09/28/2018] [Indexed: 11/26/2022]
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13
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Song SJ, Shin YC, Kim SE, Kwon IK, Lee JH, Hyon SH, Han DW, Kim B. Aligned laminin core-polydioxanone/collagen shell fiber matrices effective for neuritogenesis. Sci Rep 2018; 8:5570. [PMID: 29615798 PMCID: PMC5882927 DOI: 10.1038/s41598-018-23958-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Accepted: 03/23/2018] [Indexed: 11/21/2022] Open
Abstract
Neural tissue regeneration is a significant challenge, because severe nerve injury is quite difficult to regenerate spontaneously. Although, many studies have been devoted to promote nerve regeneration, there are still many technical challenges to achieve satisfactory results. In this study, we designed biomimetic matrices composed of aligned laminin core-polydioxanone/collagen shell (Lam-PDO/Col) fibers, which can provide both topographical and biochemical cues for promoting neuritogenesis. The aligned Lam-PDO/Col core-shell fiber matrices were fabricated by magnetic field-assisted electrospinning with the coaxial system, and their potential as biofunctional scaffolds for promoting neuritogenesis was explored. It was demonstrated that the aligned Lam-PDO/Col core-shell fibers were successfully fabricated, and the laminin in the core of fibers was steadily and continuously released from fibers. In addition, the cellular behaviors of hippocampal neuronal cells on the matrices were significantly enhanced. Moreover, the aligned Lam-PDO/Col fiber matrices effectively improved and guided neurite outgrowth as well as the neurogenic differentiation by providing both topographical and biochemical cues through aligned fiber structure and sustained release of laminin. Collectively, it is suggested that the aligned Lam-PDO/Col core-shell fiber matrices are one of the most promising approaches for promoting neuritogenesis and neural tissue regeneration.
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Affiliation(s)
- Su-Jin Song
- Department of Cogno-Mechatronics Engineering, College of Nanoscience & Nanotechnology, Pusan National University, Busan, 46241, Republic of Korea
| | - Yong Cheol Shin
- Research Center for Energy Convergence Technology, Pusan National University, Busan, 46241, Republic of Korea
| | - Sung Eun Kim
- Department of Cogno-Mechatronics Engineering, College of Nanoscience & Nanotechnology, Pusan National University, Busan, 46241, Republic of Korea
| | - Il Keun Kwon
- Department of Dental Materials, School of Dentistry, Kyung Hee University, Seoul, 02447, Republic of Korea
| | - Jong-Ho Lee
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Seoul National University, Seoul, 03080, Republic of Korea
| | - Suong-Hyu Hyon
- Center for Fiber and Textile Science, Kyoto Institute of Technology, Matsugasaki, Kyoto, 606-8585, Japan
| | - Dong-Wook Han
- Department of Cogno-Mechatronics Engineering, College of Nanoscience & Nanotechnology, Pusan National University, Busan, 46241, Republic of Korea.
| | - Bongju Kim
- Dental Life Science Research Institute, Seoul National University Dental Hospital, Seoul, 03080, Republic of Korea.
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14
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Shin YC, Kim C, Song SJ, Jun S, Kim CS, Hong SW, Hyon SH, Han DW, Oh JW. Ternary Aligned Nanofibers of RGD Peptide-Displaying M13 Bacteriophage/PLGA/Graphene Oxide for Facilitated Myogenesis. Nanotheranostics 2018; 2:144-156. [PMID: 29577018 PMCID: PMC5865268 DOI: 10.7150/ntno.22433] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Accepted: 12/23/2017] [Indexed: 12/14/2022] Open
Abstract
Recently, there have been tremendous efforts to develop the biofunctional scaffolds by incorporating various biochemical factors. In the present study, we fabricated poly(lactic-co-glycolic acid) (PLGA) nanofiber sheets decorated with graphene oxide (GO) and RGD peptide. The decoration of GO and RGD peptide was readily achieved by using RGD peptide-displaying M13 bacteriophage (RGD-M13 phage) and electrospinning. Furthermore, the aligned GO-decorated PLGA/RGD peptide (GO-PLGA/RGD) ternary nanofiber sheets were prepared by magnetic field-assisted electrospinning, and their potentials as bifunctional scaffolds for facilitating myogenesis were explored. We characterized the physicochemical and mechanical properties of the sheets by scanning electron microscopy, Raman spectroscopy, contact angle measurement, and tensile test. In addition, the C2C12 skeletal myoblasts were cultured on the aligned GO-PLGA/RGD nanofiber sheets, and their cellular behaviors, including initial attachment, proliferation and myogenic differentiation, were evaluated. Our results revealed that the GO-PLGA/RGD nanofiber sheets had suitable physicochemical and mechanical properties for supporting cell growth, and could significantly promote the spontaneous myogenic differentiation of C2C12 skeletal myoblasts. Moreover, it was revealed that the myogenic differentiation was further accelerated on the aligned GO-PLGA/RGD nanofiber sheets due to the synergistic effects of RGD peptide, GO and aligned nanofiber structure. Therefore, , it is suggested that the aligned GO-PLGA/RGD ternary nanofiber sheets are one of the most promising approaches for facilitating myogenesis and promoting skeletal tissue regeneration.
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Affiliation(s)
- Yong Cheol Shin
- Research Center for Energy Convergence Technology, Pusan National University, Busan 46241, Republic of Korea
| | - Chuntae Kim
- Department of Nanofusion Technology, College of Nanoscience & Nanotechnology, Pusan National University, Busan 46241, Republic of Korea
| | - Su-Jin Song
- Department of Cogno-Mechatronics Engineering, College of Nanoscience & Nanotechnology, Pusan National University, Busan 46241, Republic of Korea
| | - Seungwon Jun
- Department of Cogno-Mechatronics Engineering, College of Nanoscience & Nanotechnology, Pusan National University, Busan 46241, Republic of Korea
| | - Chang-Seok Kim
- Department of Cogno-Mechatronics Engineering, College of Nanoscience & Nanotechnology, Pusan National University, Busan 46241, Republic of Korea
| | - Suck Won Hong
- Department of Cogno-Mechatronics Engineering, College of Nanoscience & Nanotechnology, Pusan National University, Busan 46241, Republic of Korea
| | - Suong-Hyu Hyon
- Center for Fiber and Textile Science, Kyoto Institute of Technology, Matsugasaki, Kyoto 606-8585, Japan
| | - Dong-Wook Han
- Department of Cogno-Mechatronics Engineering, College of Nanoscience & Nanotechnology, Pusan National University, Busan 46241, Republic of Korea
| | - Jin-Woo Oh
- Department of Nanofusion Technology, College of Nanoscience & Nanotechnology, Pusan National University, Busan 46241, Republic of Korea
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Abstract
Subcutaneous islet transplantation has become an attractive modality. With development of tissue-engineering techniques, it is possible to rectify the disadvantage of poor blood supply in the subcutaneous site by reconstruction of the capillary network. According to reports, the Chitosan sponge (CS) could be used for reconstruction of in vitro capillary-like network and could be used in artificial skin equivalent. In this study, we cultured the islets in CS for future application. CSs, having 200–500 μm pore size, were prepared by freeze-drying method. Rat islets were isolated from the pancreas of Lewis rats (10 weeks old, 280–300 g, male) by collagenase digestion followed by discontinuous dextran gradient centrifugation method. Each 20 islets were seeded equally into the CSs and were cultured for 62 days with various culture media such as RPMI-1640, Dulbecco's modified Eagle's medium (DMEM), and Eagle's MEM. They contained 10% fetal bovine serum (FBS) and 5 ml/L antibiotic-antimycotic mixed stock solution in the culture dishes. Insulin concentration both inside and outside of the islet-seeded CS was measured during culture. Changes in the morphology of islets were also observed in this study. Freshly isolated islets had a loose appearance with an irregular border, and most were seen as a single islet. Occasionally a cluster, consisting of 2–4 islets ranging mainly from 150 to 250 μm in diameter, was observed. Islets cultured in the CSs in different culture media retained initial morphology, which had well-delineated smooth borders for at least 53 days. The insulin release behavior of islets cultured in the CS showed constant secretory capacities for 49 days. After that they exhibited a rapid and definitive decline from the initial insulin release. Until this stage, insulin concentration in the CS was well maintained. The properties were dependent on culture medium used and insulin diffusion released from islets. This experiment is a new study model for establishment of islet culture in a three-dimensional matrix. Also extension of this observation will provide new insights for islet transplantation at the subcutaneous site by a tissue-engineering approach.
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Affiliation(s)
- Wanxing Cui
- Department of Surgery and Surgical Basic Science, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Do-Hoon Kim
- Institute for Frontier Medical Sciences, Kyoto University, Kyoto, Japan
| | - Masayuki Imamura
- Department of Surgery and Surgical Basic Science, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Suong-Hyu Hyon
- Institute for Frontier Medical Sciences, Kyoto University, Kyoto, Japan
| | - Kazutomo Inoue
- Institute for Frontier Medical Sciences, Kyoto University, Kyoto, Japan
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Zhang G, Matsumoto S, Hyon SH, Qualley SA, Upshaw L, Strong DM, Reems JA. Polyphenol, an Extract of Green Tea, Increases Culture Recovery Rates of Isolated Islets from Nonhuman Primate Pancreata and Marginal Grade Human Pancreata. Cell Transplant 2017; 13:145-52. [PMID: 15129760 DOI: 10.3727/000000004773301825] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Investigations indicate that an extract of green tea, polyphenol, can significantly increase the culture survival rate of rat islets without deteriorating their functionality. In this study, we examined the effect of adding polyphenol to islets isolated from human pancreata and nonhuman primate pancreata. Islets were isolated from human pancreata that did not meet criteria for clinical transplantation (n = 6) and from nonhuman primate pancreata (n = 5). The islets were cultured in CMRL-1066 + 10% FCS with the addition of 0, 30, 60, 125, 250, or 500 μg/ml of polyphenol. After 24 or 48 h of culture, islet yield, viability, purity, morphology, and stimulation index was assessed. RT-PCR and Western blot analysis were also performed to assess the expression levels of the apoptotic related genes, Bcl-2 and BAX. After 24 h of culture, islet yields were significantly higher in cultures supplemented with 30–250 μg/ml of polyphenol than in cultures without polyphenol. After 48 h of culture, significant differences in islet numbers were observed with polyphenol concentrations of 125 μg/ml (p < 0.01) and 250 μg/ml (p < 0.01). However, no significant differences were noted in islet viability, purity, morphology, and stimulation index at each time point with or without polyphenol. RT-PCR and Western blot analysis of the islets indicated that Bcl-2 levels increased by 2.5-fold and BAX levels decreased by twofold in cultures supplemented with polyphenol. This resulted in BAX/Bcl-2 ratios that were lower in polyphenol-supplemented cultures than with control cultures. Polyphenol increases culture recovery rates by precluding islet apoptosis.
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Affiliation(s)
- Guangming Zhang
- Northwest Tissue Center at the Puget Sound Blood Center, Seattle, WA 98104, USA
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17
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Abstract
Green tea polyphenols are known to protect allogenic donor tissues from acute rejection by their recipients. This immunosuppressive effect may be generated by a unique chemical property of the major component, epigallocatechin-o-gallate (EGCG), which can block specific cell surface molecules of the donor tissues. To test this hypothesis, we examined the effects of EGCG on the murine mixed lymphocyte reactions. EGCG treatment of stimulator cells significantly attenuated the proliferation of responder T cells. The proliferation did not recover upon the secondary stimulations by fresh untreated cells or exogenous IL-2. Flow cytometric analyses showed that EGCG treatment decreased the staining intensities of various cell surface molecules including MHC II, which plays a major role in antigen presentation, and B7.1, B7.2, and their ligand, CD28, which are required for costimulatory signals in T-cell activation. These results suggest that an anergic state of alloreactive T cells may be induced by either weakening of antigen signaling or blockage of costimulatory signals with EGCG. Other possible mechanisms behind the immunosuppressive effect and a potential use of EGCG treatment of donor tissues in transplantation medicine are discussed.
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Affiliation(s)
- Jong-Yoon Kim
- Department of Simulation Medical Engineering, Institute for Frontier Medical Sciences, Kyoto University, Kyoto 606–8507, Japan
| | - Tatsuo Kina
- Department of Immunology, Institute for Frontier Medical Sciences, Kyoto University, Kyoto 606–8507, Japan
| | - Yasuhiro Iwanaga
- Department of Transplantation Immunology, Kyoto University Hospital, Kyoto 606–8507, Japan
| | - Hirofumi Noguchi
- Department of Transplantation Immunology, Kyoto University Hospital, Kyoto 606–8507, Japan
| | - Kazuaki Matsumura
- Department of Simulation Medical Engineering, Institute for Frontier Medical Sciences, Kyoto University, Kyoto 606–8507, Japan
| | - Suong-Hyu Hyon
- Department of Simulation Medical Engineering, Institute for Frontier Medical Sciences, Kyoto University, Kyoto 606–8507, Japan
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18
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Abstract
Green tea polyphenols have recently attracted medical attention as bioactive agents with anticancer, antimicrobial, and antiviral effects. We discovered their new usage as preservative agents for tissue transplants. We preserved rat aortas in a DMEM solution containing polyphenols extracted from green tea leaves. The preserved aortas retained original structures and mechanical strength, and were devoid of any undesirable cell secretions for over a month under physiological conditions. In addition, aortas from Lewis rats preserved for a month and transplanted to allogenic ACI rats completely avoided rejection by the host, suggesting that the polyphenols have immunosuppressive actions on the aortic tissues. From these results, we conclude that polyphenol treatment of aortic tissue transplant can maintain its viability for extended periods of time either before or after transplantation, and the method can be applicable to other transplantation situations.
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Affiliation(s)
- S H Hyon
- Institute for Frontier Medical Sciences, Kyoto University, Kyoto, Japan.
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Fujikawa T, Ando T, Gen Y, Hyon SH, Kubota C. Cryopreservation of bovine somatic cells using antifreeze polyamino-acid (carboxylated poly- l -lysine). Cryobiology 2017; 76:140-145. [DOI: 10.1016/j.cryobiol.2017.01.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 01/30/2017] [Accepted: 01/31/2017] [Indexed: 01/07/2023]
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Kamoshita M, Kato T, Fujiwara K, Namiki T, Matsumura K, Hyon SH, Ito J, Kashiwazaki N. Successful vitrification of pronuclear-stage pig embryos with a novel cryoprotective agent, carboxylated ε-poly-L-lysine. PLoS One 2017; 12:e0176711. [PMID: 28448636 PMCID: PMC5407792 DOI: 10.1371/journal.pone.0176711] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Accepted: 04/15/2017] [Indexed: 11/18/2022] Open
Abstract
Vitrification is a powerful tool for the efficient production of offspring derived from cryopreserved oocytes or embryos in mammalian species including domestic animals. Genome editing technologies such as transcription activator-like effector nucleases (TALENs) and clustered regularly interspaced short palindromic repeats (CRISPR)/ CRISPR-associated (Cas)9 are now available even for domestic species, suggesting that the vitrification of embryos at the pronuclear stage (PN) will be more important because they could provide genomic host cells to be targeted by TALENs or CRISPR/Cas9. Although we reported the successful production of piglets derived from vitrified PN embryos by a solid-surface vitrification method with glutathione supplementation, further improvements are required. The cryoprotective agent (CPA) carboxylated ε-poly-L-lysine (COOH-PLL) was introduced in 2009. COOH-PLL reduces the physical and physiological damage caused by cryopreservation in mammalian stem cells and the vitrification of mouse oocytes and embryos. Those results suggested that vitrification of COOH-PLL may help improve the developmental ability of pig embryos vitrified at the PN stage. However, it remains unclear whether COOH-PLL is available as a CPA for the vitrification of embryos in domestic species. In this study, we evaluated COOH-PLL as a CPA with ethylene glycol (EG) and Cryotop as a device for the vitrification of PN pig embryos. Exposure to vitrification solution supplemented with COOH-PLL up to 30% did not decrease developmental ability to the 2-cell stage and the blastocyst stage. After warming, most of the vitrified embryos survived regardless of the concentration of COOH-PLL (76.0 ± 11.8% to 91.8 ± 4.6%). However, the vitrified embryos without COOH-PLL showed a lower development rate up to the blastocyst stage (1.3 ± 1.0%) compared to the fresh embryos (28.4 ± 5.0%) (p<0.05). In contrast, supplementation of 20% (w/v) COOH-PLL in the vitrification solution dramatically improved the developmental ability to blastocysts of the vitrified embryos (19.4 ± 4.6%) compared to those without COOH-PLL (p<0.05). After the transfer of embryos vitrified with 30% (v/v) EG and 20% (w/v) COOH-PLL, we successfully obtained 15 piglets from 8 recipients. Taken together, our present findings demonstrate for the first time that COOH-PLL is an effective CPA for embryo vitrification in the pig. COOH-PLL is a promising CPA for further improvements in the vitrification of oocytes and embryos in mammalian species.
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Affiliation(s)
- Maki Kamoshita
- Laboratory of Animal Reproduction, Graduate School of Veterinary Science, Azabu University, Sagamihara, Japan
| | - Tsubasa Kato
- Laboratory of Animal Reproduction, Graduate School of Veterinary Science, Azabu University, Sagamihara, Japan
| | - Katsuyoshi Fujiwara
- Laboratory of Animal Reproduction, Graduate School of Veterinary Science, Azabu University, Sagamihara, Japan
| | - Takafumi Namiki
- Laboratory of Animal Reproduction, Graduate School of Veterinary Science, Azabu University, Sagamihara, Japan
| | | | - Suong-Hyu Hyon
- Center for Fiber and Textile Science, Kyoto Institute of Technology, Matsugasaki, Kyoto, Japan
| | - Junya Ito
- Laboratory of Animal Reproduction, Graduate School of Veterinary Science, Azabu University, Sagamihara, Japan
- School of Veterinary Medicine, Azabu University, Sagamihara, Japan
| | - Naomi Kashiwazaki
- Laboratory of Animal Reproduction, Graduate School of Veterinary Science, Azabu University, Sagamihara, Japan
- School of Veterinary Medicine, Azabu University, Sagamihara, Japan
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21
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Shin YC, Kim J, Kim SE, Song SJ, Hong SW, Oh JW, Lee J, Park JC, Hyon SH, Han DW. RGD peptide and graphene oxide co-functionalized PLGA nanofiber scaffolds for vascular tissue engineering. Regen Biomater 2017; 4:159-166. [PMID: 28740639 PMCID: PMC5516678 DOI: 10.1093/rb/rbx001] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 01/02/2017] [Accepted: 01/04/2017] [Indexed: 12/04/2022] Open
Abstract
In recent years, much research has been suggested and examined for the development of tissue engineering scaffolds to promote cellular behaviors. In our study, RGD peptide and graphene oxide (GO) co-functionalized poly(lactide-co-glycolide, PLGA) (RGD-GO-PLGA) nanofiber mats were fabricated via electrospinning, and their physicochemical and thermal properties were characterized to explore their potential as biofunctional scaffolds for vascular tissue engineering. Scanning electron microscopy images revealed that the RGD-GO-PLGA nanofiber mats were readily fabricated and composed of random-oriented electrospun nanofibers with average diameter of 558 nm. The successful co-functionalization of RGD peptide and GO into the PLGA nanofibers was confirmed by Fourier-transform infrared spectroscopic analysis. Moreover, the surface hydrophilicity of the nanofiber mats was markedly increased by co-functionalizing with RGD peptide and GO. It was found that the mats were thermally stable under the cell culture condition. Furthermore, the initial attachment and proliferation of primarily cultured vascular smooth muscle cells (VSMCs) on the RGD-GO-PLGA nanofiber mats were evaluated. It was revealed that the RGD-GO-PLGA nanofiber mats can effectively promote the growth of VSMCs. In conclusion, our findings suggest that the RGD-GO-PLGA nanofiber mats can be promising candidates for tissue engineering scaffolds effective for the regeneration of vascular smooth muscle.
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Affiliation(s)
| | | | | | - Su-Jin Song
- Department of Cogno-Mechatronics Engineering
| | - Suck Won Hong
- Department of Cogno-Mechatronics Engineering.,Department of Optics and Mechatronics Engineering
| | - Jin-Woo Oh
- Department of Nanoenergy Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan 46241, Korea
| | - Jaebeom Lee
- Department of Cogno-Mechatronics Engineering.,Department of Optics and Mechatronics Engineering
| | | | - Suong-Hyu Hyon
- Center for Fiber and Textile Science, Kyoto Institute of Technology, Matsugasaki, Kyoto 606-8585, Japan
| | - Dong-Wook Han
- Department of Cogno-Mechatronics Engineering.,Department of Optics and Mechatronics Engineering
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22
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Tsuji Y, Iwasaki T, Ogata H, Matsumoto Y, Kokeguchi S, Matsumura K, Hyon SH, Shiotani M. The Beneficial Effect of Carboxylated Poly-L-Lysine on Cryosurvival of Vitrified Early Stage Embryos. Cryo Letters 2017; 38:1-6. [PMID: 28376134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
BACKGROUND In the vitrification of embryos, dimethyl sulfoxide (DMSO) is one of the most effective cryoprotectant agents (CPAs), but cytotoxic effects of DMSO on embryos are well known. Carboxylated poly-L-lysine (CPLL) has been identified as an effective cryoprotectant of cultured cell lines and mammalian oocytes. OBJECTIVE To evaluate the efficacy and safety of CPLL as a CPA for developmental stage embryos. MATERIALS AND METHODS Mouse 8-cell embryos and blastocysts were vitrified with ethylene glycol (EG), DMSO/EG, or CPLL/EG and the developmental potency assessed in vitro. RESULTS In 8-cell embryos, there were no differences between the levels of survival and developmental progress into the blastocyst stage in each solution. At the blastocyst stage, the proportion of dead cells was significantly higher in the EG compared with other solutions. In contrast, there were no differences between the DMSO/EG and CPLL/EG. CONCLUSION These results indicate that CPLL can be used as a replacement for DMSO in the vitrification of mouse embryos.
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Affiliation(s)
- Y Tsuji
- Hanabusa Women's Clinic, Kobe city, Hyogo, Japan.
| | - T Iwasaki
- Hanabusa Women's Clinic, Kobe city, Hyogo, Japan
| | - H Ogata
- Hanabusa Women's Clinic, Kobe city, Hyogo, Japan
| | - Y Matsumoto
- Hanabusa Women's Clinic, Kobe city, Hyogo, Japan
| | - S Kokeguchi
- Hanabusa Women's Clinic, Kobe city, Hyogo, Japan
| | - K Matsumura
- School of Materials Science, Japan Advanced Institute of Science and Technology, Nomi, Ishikawa, Japan
| | - S H Hyon
- Center for Fiber and Textile Science Kyoto Institute of Technology (KIT), Kyoto Fushimi-ku, Kyoto, Japan
| | - M Shiotani
- Hanabusa Women's Clinic, Kobe city, Hyogo, Japan
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23
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Shin YC, Shin DM, Lee EJ, Lee JH, Kim JE, Song SH, Hwang DY, Lee JJ, Kim B, Lim D, Hyon SH, Lim YJ, Han DW. Hyaluronic Acid/PLGA Core/Shell Fiber Matrices Loaded with EGCG Beneficial to Diabetic Wound Healing. Adv Healthc Mater 2016; 5:3035-3045. [PMID: 27805803 DOI: 10.1002/adhm.201600658] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 09/02/2016] [Indexed: 01/13/2023]
Abstract
During the last few decades, considerable research on diabetic wound healing strategies has been performed, but complete diabetic wound healing remains an unsolved problem, which constitutes an enormous biomedical burden. Herein, hyaluronic acid (HA)/poly(lactic-co-glycolic acid, PLGA) core/shell fiber matrices loaded with epigallocatechin-3-O-gallate (EGCG) (HA/PLGA-E) are fabricated by coaxial electrospinning. HA/PLGA-E core/shell fiber matrices are composed of randomly-oriented sub-micrometer fibers and have a 3D porous network structure. EGCG is uniformly dispersed in the shell and sustainedly released from the matrices in a stepwise manner by controlled diffusion and PLGA degradation over four weeks. EGCG does not adversely affect the thermomechanical properties of HA/PLGA-E matrices. The number of human dermal fibroblasts attached on HA/PLGA-E matrices is appreciably higher than that on HA/PLGA counterparts, while their proliferation is steadily retained on HA/PLGA-E matrices. The wound healing activity of HA/PLGA-E matrices is evaluated in streptozotocin-induced diabetic rats. After two weeks of surgical treatment, the wound areas are significantly reduced by the coverage with HA/PLGA-E matrices resulting from enhanced re-epithelialization/neovascularization and increased collagen deposition, compared with no treatment or HA/PLGA. In conclusion, the HA/PLGA-E matrices can be potentially exploited to craft strategies for the acceleration of diabetic wound healing and skin regeneration.
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Affiliation(s)
- Yong Cheol Shin
- Department of Cogno-Mechatronics Engineering; College of Nanoscience & Nanotechnology; Pusan National University; Busan 46241 Korea
| | - Dong-Myeong Shin
- Research Center for Energy Convergence Technology; Pusan National University; Busan 46241 Korea
| | - Eun Ji Lee
- Department of Cogno-Mechatronics Engineering; College of Nanoscience & Nanotechnology; Pusan National University; Busan 46241 Korea
| | - Jong Ho Lee
- Department of Cogno-Mechatronics Engineering; College of Nanoscience & Nanotechnology; Pusan National University; Busan 46241 Korea
| | - Ji Eun Kim
- Department of Biomaterials Science; College of Natural Resources and Life Science; Life and Industry Convergence Research Institute; Pusan National University; Miryang 50463 Korea
| | - Sung Hwa Song
- Department of Biomaterials Science; College of Natural Resources and Life Science; Life and Industry Convergence Research Institute; Pusan National University; Miryang 50463 Korea
| | - Dae-Youn Hwang
- Department of Biomaterials Science; College of Natural Resources and Life Science; Life and Industry Convergence Research Institute; Pusan National University; Miryang 50463 Korea
| | - Jun Jae Lee
- Department of Prosthodontics; Dental Research Institute; School of Dentistry; Seoul National University; Seoul 03080 Korea
| | - Bongju Kim
- Dental Life Science Research Institute; Seoul National University Dental Hospital; Seoul 03080 Korea
| | - Dohyung Lim
- Department of Mechanical Engineering; Sejong University; Seoul 05006 Korea
| | - Suong-Hyu Hyon
- Center for Fiber and Textile Science; Kyoto Institute of Technology; Kyoto 606-8585 Japan
| | - Young-Jun Lim
- Department of Prosthodontics; Dental Research Institute; School of Dentistry; Seoul National University; Seoul 03080 Korea
| | - Dong-Wook Han
- Department of Cogno-Mechatronics Engineering; College of Nanoscience & Nanotechnology; Pusan National University; Busan 46241 Korea
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Matsumura K, Kawamoto K, Takeuchi M, Yoshimura S, Tanaka D, Hyon SH. Cryopreservation of a Two-Dimensional Monolayer Using a Slow Vitrification Method with Polyampholyte to Inhibit Ice Crystal Formation. ACS Biomater Sci Eng 2016; 2:1023-1029. [DOI: 10.1021/acsbiomaterials.6b00150] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kazuaki Matsumura
- School
of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
| | - Keiko Kawamoto
- School
of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
| | - Masahiro Takeuchi
- Taiyo Nippon Sanso Corp., Toyo
Building, 1-3-26 Koyama, Shinagawa-ku, Tokyo 142-8558, Japan
| | - Shigehiro Yoshimura
- Taiyo Nippon Sanso Corp., Toyo
Building, 1-3-26 Koyama, Shinagawa-ku, Tokyo 142-8558, Japan
| | - Daisuke Tanaka
- Genetic
Resources Center, National Agriculture and Food Research Ogranization, 2-1-2 Kannondai, Tsukuba, Ibaraki 305-8602, Japan
| | - Suong-Hyu Hyon
- Center
for Fiber and Textile Science, Kyoto Institute of Technology, Matsugasaki, Kyoto 606-8585, Japan
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Funamoto M, Masumoto H, Takaori K, Taki T, Setozaki S, Yamazaki K, Minakata K, Ikeda T, Hyon SH, Sakata R. Green Tea Polyphenol Prevents Diabetic Rats From Acute Kidney Injury After Cardiopulmonary Bypass. Ann Thorac Surg 2016; 101:1507-13. [DOI: 10.1016/j.athoracsur.2015.09.080] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Revised: 09/14/2015] [Accepted: 09/21/2015] [Indexed: 12/28/2022]
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Chimpibul W, Nagashima T, Hayashi F, Nakajima N, Hyon SH, Matsumura K. Dextran oxidized by a malaprade reaction shows main chain scission through a maillard reaction triggered by schiff base formation between aldehydes and amines. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/pola.28099] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Wichchulada Chimpibul
- School of Materials Science; Japan Advanced Institute of Science and Technology; 1-1 Asahidai Nomi Ishikawa 923-1292 Japan
- Faculty of Science; Chulalongkorn University; 254 Phayathai Road, Pathumwan Bangkok 10330 Thailand
| | - Toshio Nagashima
- NMR Facility, Division of Structural and Synthetic Biology; RIKEN Center for Life Science Technologies; 1-7-22 Suehiro-cho, Tsurumi-ku Yokohama City Kanagawa 230-0045 Japan
| | - Fumiaki Hayashi
- NMR Facility Support Unit, NMR Facility, Division of Structural and Synthetic Biology; RIKEN Center for Life Science Technologies; 1-7-22 Suehiro-cho, Tsurumi-ku Yokohama City Kanagawa 230-0045 Japan
| | - Naoki Nakajima
- BMG Incorporated; 45 Minamimatsunoki-cho, Higashikujo Minami-ku Kyoto 601 − 8023 Japan
| | - Suong-Hyu Hyon
- BMG Incorporated; 45 Minamimatsunoki-cho, Higashikujo Minami-ku Kyoto 601 − 8023 Japan
- Center for Fiber and Textile Science, Kyoto Institute of Technology; Matsugasaki Kyoto 606-8585 Japan
| | - Kazuaki Matsumura
- School of Materials Science; Japan Advanced Institute of Science and Technology; 1-1 Asahidai Nomi Ishikawa 923-1292 Japan
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Lee JH, Shin YC, Yang WJ, Park JC, Hyon SH, Han DW. Epigallocatechin-3- O-Gallate-Loaded Poly(lactic- co-glycolic acid) Fibrous Sheets as Anti-Adhesion Barriers. J Biomed Nanotechnol 2015; 11:1461-71. [DOI: 10.1166/jbn.2015.2080] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Lee EJ, Lee JH, Jin L, Jin OS, Shin YC, Sang JO, Lee J, Hyon SH, Han DW. Hyaluronic acid/poly(lactic-co-glycolic acid) core/shell fiber meshes loaded with epigallocatechin-3-O-gallate as skin tissue engineering scaffolds. J Nanosci Nanotechnol 2014; 14:8458-8463. [PMID: 25958546 DOI: 10.1166/jnn.2014.9922] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this study, hyaluronic acid (HA)/poly(lactic-co-glycolic acid, PLGA) core/shell fiber meshes loaded with epigallocatechin-3-O-gallate (EGCG) (HA/PLGA-E) for application to tissue engineering scaffolds for skin regeneration were prepared via coaxial electrospinning. Physicochemical properties of HA/PLGA-E core/shell fiber meshes were characterized by SEM, Raman spectroscopy, contact angle, EGCG release profiling and in vitro degradation. Biomechanical properties of HA/PLGA-E meshes were also investigated by a tensile strength test. SEM images showed that HA/PLGA-E fiber meshes had a three-dimensional interconnected pore structure with an average fiber diameter of about 1270 nm. Raman spectra revealed that EGCG was uniformly dispersed in the PLGA shell of meshes. HA/PLGA-E meshes showed sustained EGCG release patterns by controlled diffusion and PLGA degradation over 4 weeks. EGCG loading did not adversely affect the tensile strength and elastic modulus of HA/PLGA meshes, while increased their hydrophilicity and surface energy. Attachment of human dermal fibroblasts on HA/PLGA-E meshes was appreciably increased and their proliferation was steadily retained during the culture period. These results suggest that HA/PLGA-E core/shell fiber meshes can be potentially used as scaffolds supporting skin regeneration.
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Shin YC, Yang WJ, Lee JH, Oh JW, Kim TW, Park JC, Hyon SH, Han DW. PLGA nanofiber membranes loaded with epigallocatechin-3-O-gallate are beneficial to prevention of postsurgical adhesions. Int J Nanomedicine 2014; 9:4067-78. [PMID: 25187710 PMCID: PMC4149440 DOI: 10.2147/ijn.s68197] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
This study concentrates on the development of biodegradable nanofiber membranes with controlled drug release to ensure reduced tissue adhesion and accelerated healing. Nanofibers of poly(lactic-co-glycolic acid) (PLGA) loaded with epigallocatechin-3-O-gallate (EGCG), the most bioactive polyphenolic compound in green tea, were electrospun. The physicochemical and biomechanical properties of EGCG-releasing PLGA (E-PLGA) nanofiber membranes were characterized by atomic force microscopy, EGCG release and degradation profiles, and tensile testing. In vitro antioxidant activity and hemocompatibility were evaluated by measuring scavenged reactive oxygen species levels and activated partial thromboplastin time, respectively. In vivo antiadhesion efficacy was examined on the rat peritonea with a surgical incision. The average fiber diameter of E-PLGA membranes was approximately 300–500 nm, which was almost similar to that of pure PLGA equivalents. E-PLGA membranes showed sustained EGCG release mediated by controlled diffusion and PLGA degradation over 28 days. EGCG did not adversely affect the tensile strength of PLGA membranes, whereas it significantly decreased the elastic modulus and increased the strain at break. E-PLGA membranes were significantly effective in both scavenging reactive oxygen species and extending activated partial thromboplastin time. Macroscopic observation after 1 week of surgical treatment revealed that the antiadhesion efficacy of E-PLGA nanofiber membranes was significantly superior to those of untreated controls and pure PLGA equivalents, which was comparable to that of a commercial tissue-adhesion barrier. In conclusion, the E-PLGA hybrid nanofiber can be exploited to craft strategies for the prevention of postsurgical adhesions.
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Affiliation(s)
- Yong Cheol Shin
- Department of Cogno-Mechatronics Engineering, Pusan National University, Busan, Republic of Korea
| | - Won Jun Yang
- Department of Cogno-Mechatronics Engineering, Pusan National University, Busan, Republic of Korea
| | - Jong Ho Lee
- Department of Cogno-Mechatronics Engineering, Pusan National University, Busan, Republic of Korea
| | - Jin-Woo Oh
- Department of Nanomaterials Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan, Republic of Korea
| | - Tai Wan Kim
- Department of Design, College of Arts, Pusan National University, Busan, Republic of Korea
| | - Jong-Chul Park
- Department of Medical Engineering, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Suong-Hyu Hyon
- Center for Fiber and Textile Science, Kyoto Institute of Technology, Kyoto, Japan
| | - Dong-Wook Han
- Department of Cogno-Mechatronics Engineering, Pusan National University, Busan, Republic of Korea
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Vorontsov DA, Sazaki G, Hyon SH, Matsumura K, Furukawa Y. Antifreeze Effect of Carboxylated ε-Poly-l-lysine on the Growth Kinetics of Ice Crystals. J Phys Chem B 2014; 118:10240-9. [DOI: 10.1021/jp507697q] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Dmitry A. Vorontsov
- Lobachevsky State University of Nizhny Novgorod, Gagarin Avenue,
23, Nizhny Novgorod, 603950 Russia
- Institute of Low Temperature Science, Hokkaido University, Kita-19, Nishi-8, Kita-ku, Sapporo, 060-0819 Japan
| | - Gen Sazaki
- Institute of Low Temperature Science, Hokkaido University, Kita-19, Nishi-8, Kita-ku, Sapporo, 060-0819 Japan
| | - Suong-Hyu Hyon
- Center for Fiber and Textile Science, Kyoto Institute of Technology, 105 Jibucho, Kyoto Fushimi-ku, Kyoto, 612-8374 Japan
| | - Kazuaki Matsumura
- Japan Advanced Institute of Science and Technology, Asahidai 1-1, Nomi-shi, Ishikawa, 923-1292 Japan
| | - Yoshinori Furukawa
- Institute of Low Temperature Science, Hokkaido University, Kita-19, Nishi-8, Kita-ku, Sapporo, 060-0819 Japan
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Kobayashi M, Koide T, Hyon SH. Tribological characteristics of polyethylene glycol (PEG) as a lubricant for wear resistance of ultra-high-molecular-weight polyethylene (UHMWPE ) in artificial knee join. J Mech Behav Biomed Mater 2014; 38:33-8. [PMID: 25016174 DOI: 10.1016/j.jmbbm.2014.06.003] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2014] [Revised: 05/30/2014] [Accepted: 06/05/2014] [Indexed: 11/25/2022]
Abstract
For the longevity of total knee joint prostheses, we have developed an artificial lubricant using polyethylene glycol (PEG) for the prevention of wear of ultra-high-molecular-weight polyethylene (UHMWPE). In the present study, the lubricative function of this PEG lubricant was evaluated by a wear test using Co-Cr alloy and UHMWPE counter surface samples. As a result, human synovial fluid including the PEG lubricant showed good result regarding the wear volume and a worn surface of UHMWPE. Considering its lubrication mechanism, it is suspected that interaction between the PEG molecules and the proteins in synovial fluid was involved. Since PE molecules are also organic compounds having a hydroxyl group at one or both ends, the albumin and PEG molecule complex would have bound more strongly to the metal oxide surface and UHMWPE surfaces might enhance and stabilize the lubricating film between the contact surfaces under the boundary lubrication. This study suggests that PEG lubricant as an intra-articular viscous supplement has the potential to prevent wear of UHMWPE by mixing with synovial fluid and to contribute to the longevity of knee joint prostheses.
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Affiliation(s)
- Masanori Kobayashi
- Bio-medical Engineering Laboratory, Department of Integral Mechanical Engineering, Faculty of Engineering, Daido University, 10-3 Takiharu-cho, Minami-ku, Nagoya, Japan.
| | - Takayuki Koide
- Bio-medical Engineering Laboratory, Department of Integral Mechanical Engineering, Faculty of Engineering, Daido University, 10-3 Takiharu-cho, Minami-ku, Nagoya, Japan
| | - Suong-Hyu Hyon
- Institute for Frontier Medical Sciences, Kyoto University, 353 Shogoin, Sakyo-ku, Kyoto, Japan
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Shibao Y, Fujiwara K, Kawasaki Y, Matsumura K, Hyon SH, Ito J, Kashiwazaki N. The effect of a novel cryoprotective agent, carboxylated ε-poly-l-lysine, on the developmental ability of re-vitrified mouse embryos at the pronuclear stage. Cryobiology 2014; 68:200-4. [DOI: 10.1016/j.cryobiol.2014.01.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Accepted: 01/14/2014] [Indexed: 12/28/2022]
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You KE, Koo MA, Lee DH, Kwon BJ, Lee MH, Hyon SH, Seomun Y, Kim JT, Park JC. The effective control of a bleeding injury using a medical adhesive containing batroxobin. Biomed Mater 2014; 9:025002. [DOI: 10.1088/1748-6041/9/2/025002] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Jain M, Rajan R, Hyon SH, Matsumura K. Hydrogelation of dextran-based polyampholytes with cryoprotective properties via click chemistry. Biomater Sci 2014; 2:308-317. [DOI: 10.1039/c3bm60261c] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Kim HL, Lee JH, Kwon BJ, Lee MH, Han DW, Hyon SH, Park JC. Promotion of Full-Thickness Wound Healing Using Epigallocatechin-3-O-Gallate/Poly (Lactic-Co-Glycolic Acid) Membrane as Temporary Wound Dressing. Artif Organs 2013; 38:411-7. [DOI: 10.1111/aor.12190] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Hye-Lee Kim
- Department of Medical Engineering; Yonsei University College of Medicine; Seoul Republic of Korea
- Brain Korea 21 Project for Medical Science; Yonsei University College of Medicine; Seoul Republic of Korea
| | - Jeong-Hyun Lee
- Department of Medical Engineering; Yonsei University College of Medicine; Seoul Republic of Korea
- Brain Korea 21 Project for Medical Science; Yonsei University College of Medicine; Seoul Republic of Korea
| | - Byeong Ju Kwon
- Department of Medical Engineering; Yonsei University College of Medicine; Seoul Republic of Korea
- Brain Korea 21 Project for Medical Science; Yonsei University College of Medicine; Seoul Republic of Korea
| | - Mi Hee Lee
- Department of Medical Engineering; Yonsei University College of Medicine; Seoul Republic of Korea
| | - Dong-Wook Han
- Department of Nanomedical Engineering; College of Nanoscience & Nanotechnology; Pusan National University; Busan Republic of Korea
| | - Suong-Hyu Hyon
- Center for Fiber and Textile Science; Kyoto Institute of Technology; Kyoto Japan
| | - Jong-Chul Park
- Department of Medical Engineering; Yonsei University College of Medicine; Seoul Republic of Korea
- Brain Korea 21 Project for Medical Science; Yonsei University College of Medicine; Seoul Republic of Korea
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Hyon SH, Nakajima N, Sugai H, Matsumura K. Low cytotoxic tissue adhesive based on oxidized dextran and epsilon-poly-l-lysine. J Biomed Mater Res A 2013; 102:2511-20. [DOI: 10.1002/jbm.a.34923] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2013] [Revised: 08/06/2013] [Accepted: 08/14/2013] [Indexed: 11/11/2022]
Affiliation(s)
- Suong-Hyu Hyon
- Center for Fiber and Textile Science; Kyoto Institute of Technology; Matsugasaki Kyoto 606-8585 Japan
| | - Naoki Nakajima
- BMG Incorporated; 45 Minamimatsunoki-cho Higashikujo, Minami-ku Kyoto 601−8023 Japan
| | - Hajime Sugai
- BMG Incorporated; 45 Minamimatsunoki-cho Higashikujo, Minami-ku Kyoto 601−8023 Japan
| | - Kazuaki Matsumura
- School of Materials Science; Japan Advanced Institute of Science and Technology; 1-1 Asahidai, Nomi Ishikawa 923-1292 Japan
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Maehara M, Sato M, Watanabe M, Matsunari H, Kokubo M, Kanai T, Sato M, Matsumura K, Hyon SH, Yokoyama M, Mochida J, Nagashima H. Development of a novel vitrification method for chondrocyte sheets. BMC Biotechnol 2013; 13:58. [PMID: 23886356 PMCID: PMC3726287 DOI: 10.1186/1472-6750-13-58] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2013] [Accepted: 07/22/2013] [Indexed: 11/16/2022] Open
Abstract
Background There is considerable interest in using cell sheets for the treatment of various lesions as part of regenerative medicine therapy. Cell sheets can be prepared in temperature-responsive culture dishes and applied to injured tissue. For example, cartilage-derived cell sheets are currently under preclinical testing for use in treatment of knee cartilage injuries. The additional use of cryopreservation technology could increase the range and practicality of cell sheet therapies. To date, however, cryopreservation of cell sheets has proved impractical. Results Here we have developed a novel and effective method for cryopreserving fragile chondrocyte sheets. We modified the vitrification method previously developed for cryopreservation of mammalian embryos to vitrify a cell sheet through use of a minimum volume of vitrification solution containing 20% dimethyl sulfoxide, 20% ethylene glycol, 0.5 M sucrose, and 10% carboxylated poly-L-lysine. The principal feature of our method is the coating of the cell sheet with a viscous vitrification solution containing permeable and non-permeable cryoprotectants prior to vitrification in liquid nitrogen vapor. This method prevented fracturing of the fragile cell sheet even after vitrification and rewarming. Both the macro- and microstructures of the vitrified cell sheets were maintained without damage or loss of major components. Cell survival in the vitrified sheets was comparable to that in non-vitrified samples. Conclusions We have shown here that it is feasible to vitrify chondrocyte cell sheets and that these sheets retain their normal characteristics upon thawing. The availability of a practical cryopreservation method should make a significant contribution to the effectiveness and range of applications of cell sheet therapy.
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Jin OS, Lee JH, Shin YC, Lee EJ, Lee JJ, Matsumura K, Hyon SH, Han DW. Cryoprotection of fibroblasts by carboxylated poly-L-lysine upon repeated freeze/thaw cycles. Cryo Letters 2013; 34:396-403. [PMID: 23995407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The cryoprotection of carboxylated h-poly-L-lysine (COOH-PLL) was investigated on fibroblasts [L-929 cells and human dermal fibroblasts (HDFs)] during multiple freeze/thaw cycles. COOH-PLL was not toxic to two fibroblast cell types even at 25% (w/v) concentration, whereas dimethylsulphoxide (DMSO) was highly toxic over 3.13% (v/v). When L-929 cells were subjected to 5 freeze/thaw cycles, the media containing 7.5% (w/v) COOH-PLL maintained cell morphology and significantly suppressed growth inhibition as well as cell detachment (P < 0.05). The result was comparable to the media containing 10% (v/v) DMSO. For HDFs, COOH-PLL could effectively retain cell viability and proliferation against 3 freeze/thaw cycles. Cell viability of HDFs was decreased after 5 freeze/thaw cycles, but COOH-PLL exerted better cryoprotection. The cell type might account for the difference in the observations. The data demonstrated that COOH-PLL is a good cryoprotectant for mammalian cells against repeated freeze/thaw cycles, and may be used for cell preservation in fields of cell transplantation, tissue engineering and regenerative medicine.
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Affiliation(s)
- O S Jin
- Department of Applied Nanoscience, Pusan National University, Busan, Korea
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Naitoh Y, Kawauchi A, Kamoi K, Soh J, Okihara K, Hyon SH, Miki T. Hemostatic Effect of New Surgical Glue in Animal Partial Nephrectomy Models. Urology 2013; 81:1095-100. [DOI: 10.1016/j.urology.2013.01.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Revised: 12/28/2012] [Accepted: 01/02/2013] [Indexed: 10/27/2022]
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Takagi K, Araki M, Fukuoka H, Takeshita H, Hidaka S, Nanashima A, Sawai T, Nagayasu T, Hyon SH, Nakajima N. Novel powdered anti-adhesion material: preventing postoperative intra-abdominal adhesions in a rat model. Int J Med Sci 2013; 10:467-74. [PMID: 23470962 PMCID: PMC3590608 DOI: 10.7150/ijms.5607] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Accepted: 02/28/2013] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Although laparoscopic surgery has decreased postoperative adhesions, complications induced by adhesions are still of great concern. The aim of this study was to investigate the anti-adhesive effects of a novel powdered anti-adhesion material that can be applied during laparoscopic surgery in comparison with other anti-adhesion materials. METHODS Our novel powdered anti-adhesion material is composed of aldehyde dextran and ε-poly(L-lysine). In 40 male rats, a 2.5×2.0-cm abdominal wall resection and cecum abrasion were performed. The rats were randomized into four groups based on the anti-adhesion treatments: normal saline; Seprafilm(®); Interceed(®); and novel powdered anti-adhesion material. The animals were euthanized on days 7 and 28 to evaluate the adhesion severity, area of adhesion formation, gross appearance, and pathological changes. RESULTS The adhesion severities on both days 7 and 28 were significantly lower for all anti-adhesion material groups compared with the normal saline group (p<0.05). Pathologically, all groups showed inflammatory cell infiltration on day 7 and complete regeneration of the peritoneum on day 28. CONCLUSIONS Our novel powdered anti-adhesion material was found to be effective for reducing postoperative intra-abdominal adhesions and showed equivalent efficacy to commercial anti-adhesion materials.
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Affiliation(s)
- Katsunori Takagi
- Division of Surgical Oncology, Department of Translational Medical Sciences, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.
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Kanamune J, Iwanaga Y, Kina T, Noguchi H, Matsumura K, Uemoto S, Hyon SH. Attenuation of Murine Graft-Versus-Host Disease by a Tea Polyphenol. Cell Transplant 2012; 21:909-18. [DOI: 10.3727/096368911x623934] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Since donor T-cells' allorecognition of host antigens is a prerequisite for the onset of graft-versus-host disease (GVHD), blocking their cellular signaling pathways can decrease the severity of GVHD. We hypothesized that epigallocatechin-3-gallate (EGCG), due to its strong affinity to macromolecules, would adhere to surface molecules of donor T cells, inhibit their allorecognition, and attenuate GVHD in the recipient. We tested the hypothesis by treating donor splenocytes with EGCG in both in vitro and in vivo murine GVHD models. EGCG treatment decreased the proliferation of donor cells in MLR cultures and secretion of IL-2 and INF-γ. It also reduced the epitope detection of CD3∊, CD4, and CD28 but did not downregulate the protein expression of these molecules, suggesting blockage of cell surface stimulatory signals. Similarly, EGCG treatment did not decrease mRNA expression for some of these molecules but decreased mitogen-induced cell proliferation, indicating that EGCG did not interfere the transcription of these genes but affected cell proliferation pathways. Furthermore, EGCG-treated donor splenocytes, when transplanted into immunocompromized recipient mice, decreased of proliferation, and the treatment extended the recipients' survival at least during the early stage of GVHD. These results strongly suggest that EGCG attenuates GVHD by both blocking specific cell surface molecules and affecting the donor T-cell proliferation pathways.
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Affiliation(s)
- Jun Kanamune
- Transplant Unit, Kyoto University Hospital, Kyoto, Japan
| | | | - Tatsuo Kina
- Department of Immunology, Institute for Frontier Medical Sciences, Kyoto University, Kyoto, Japan
| | - Hirofumi Noguchi
- Baylor All Saints Medical Center, Baylor Research Institute, Fort Worth, TX, USA
| | | | - Shinji Uemoto
- Division of Hepato-Biliary-Pancreatic and Transplant Surgery, Department of Surgery, Kyoto University, Kyoto, Japan
| | - Suong-Hyu Hyon
- Department of Simulation Medical Engineering, Institute for Frontier Medical Sciences, Kyoto University, Kyoto, Japan
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Tsujita H, Brennan AB, Plummer CE, Nakajima N, Hyon SH, Barrie KP, Sapp B, Jackson D, Brooks DE. AnEx VivoModel for Suture-Less Amniotic Membrane Transplantation with a Chemically Defined Bioadhesive. Curr Eye Res 2012; 37:372-80. [DOI: 10.3109/02713683.2012.663853] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Lee MH, Han DW, Hyon SH, Park JC. Apoptosis of human fibrosarcoma HT-1080 cells by epigallocatechin-3-O-gallate via induction of p53 and caspases as well as suppression of Bcl-2 and phosphorylated nuclear factor-κB. Apoptosis 2011; 16:75-85. [PMID: 20963498 DOI: 10.1007/s10495-010-0548-y] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Animal tumor bioassays and in vitro cell culture systems have demonstrated that epigallocatechin-3-O-gallate (EGCG), the predominant catechin in green tea, possesses anti-proliferative and pro-apoptotic effects on various cancer cells and tumors. In this study, we investigated the effects of EGCG on cell growth, cell cycle progression, and apoptosis in human fibrosarcoma HT-1080 cells. The involvement of p53, Bcl-2, Bax, caspases, and nuclear factor-κB (NF-κB) was examined as a mechanism for the anti-cancer activity of EGCG. Time-dependent intracellular trafficking of EGCG was also determined using fluorescein isothiocyanate (FITC)-conjugated EGCG (FITC-EGCG). Our data show that EGCG treatment caused dose-dependent cell growth inhibition, cell cycle arrest at the G(0)/G(1) phase, and DNA fragmentation suggesting the induction of apoptosis in HT-1080 cells. Immunoblot analysis revealed that the expression of p53, caspase-7 and -9 as well as the ratio of Bax/Bcl-2 protein increased significantly with higher EGCG concentrations and longer incubation times. Moreover, expression of phosphorylated NF-κB/p65 in HT-1080 cells was inhibited by EGCG treatment in a dose-dependent manner, while that of unphosphorylated NF-κB/p65 remained unaffected. Here we also reveal time-dependent internalization of FITC-EGCG into the cytosol of HT-1080 cells and its subsequent nuclear translocation. These results suggest that EGCG may interrupt exogenous signals directed towards genes involved in proliferation and cell cycle progression. Taken together, our data indicate that HT-1080 apoptosis may be mediated through the induction of p53 and caspases by the pro-oxidant activity of internalized EGCG, as well as suppression of Bcl-2 and phosphorylated NF-κB by the antioxidant activity of EGCG.
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Affiliation(s)
- Mi Hee Lee
- Cellbiocontrol Laboratory, Department of Medical Engineering, Yonsei University College of Medicine, 134 Shinchon-dong, Seodaemun-gu, Seoul, Korea
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Vrana NE, Matsumura K, Hyon SH, Geever LM, Kennedy JE, Lyons JG, Higginbotham CL, Cahill PA, McGuinness GB. Cell encapsulation and cryostorage in PVA-gelatin cryogels: incorporation of carboxylated ε-poly-L-lysine as cryoprotectant. J Tissue Eng Regen Med 2011; 6:280-90. [PMID: 21706775 DOI: 10.1002/term.431] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2010] [Accepted: 03/22/2011] [Indexed: 11/10/2022]
Abstract
It is desirable to produce cryopreservable cell-laden tissue-engineering scaffolds whose final properties can be adjusted during the thawing process immediately prior to use. Polyvinyl alcohol (PVA)-based solutions provide platforms in which cryoprotected cell suspensions can be turned into a ready-to-use, cell-laden scaffold by a process of cryogelation. In this study, such a PVA system, with DMSO as the cryoprotectant, was successfully developed. Vascular smooth muscle cell (vSMC)-encapsulated cryogels were investigated under conditions of cyclic strain and in co-culture with vascular endothelial cells to mimic the environment these cells experience in vivo in a vascular tissue-engineering setting. In view of the cytotoxicity DMSO imposes with respect to the production procedure, carboxylated poly-L-lysine (COOH-PLL) was substituted as a non-cytotoxic cryoprotectant to allow longer, slower thawing periods to generate more stable cryogels. Encapsulated vSMC with DMSO as a cryoprotectant responded to 10% cyclic strain with increased alignment and proliferation. Cells were stored frozen for 1 month without loss of viability compared to immediate thawing. SMC-encapsulated cryogels also successfully supported functional endothelial cell co-culture. Substitution of COOH-PLL in place of DMSO resulted in a significant increase in cell viability in encapsulated cryogels for a range of thawing periods. We conclude that incorporation of COOH-PLL during cryogelation preserved cell functionality while retaining fundamental cryogel physical properties, thereby making it a promising platform for tissue-engineering scaffolds, particularly for vascular tissue engineering, or cell preservation within microgels.
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Affiliation(s)
- Nihal E Vrana
- Materials Processing Research Centre, Dublin City University, Glasnevin, Dublin, Ireland
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Abstract
Previously, we reported that epigallocatechin 3-O-gallate (EGCg) has growth-inhibitory effect on clinical isolates of Candida species. In this study, we investigated the antifungal activity of EGCg and antifungal agents against thirty-five of dermatophytes clinically isolated by the international guidelines (M38-A2). All isolates exhibited good susceptibility to EGCg (MIC₅₀, 2-4 μg/mL, MIC₉₀, 4-8 μg/mL, and geometric mean (GM) MICs, 3.36-4 μg/mL) than those of fluconazole (MIC₅₀, 2-16 μg/mL, MIC₉₀, 4-32 μg/mL, and GM MICs, 3.45-25.8 μg/mL) and flucytosin (MIC₅₀, MIC₉₀, and GM MICs, >64 μg/mL), although they were less susceptible to other antifungal agents, such as amphotericin B, itraconazole, and miconazole. These activities of EGCg were approximately 4-fold higher than those of fluconazole, and were 4 to 16-fold higher than flucytosin. This result indicates that EGCg can inhibit pathogenic dermatophyte species. Therefore, we suggest that EGCg may be effectively used solely as a possible agent or combined with other antifungal agents for antifungal therapy in dermatophytosis.
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Affiliation(s)
- Bong Joo Park
- Department of Medical Engineering, Yonsei University College of Medicine, Seoul, Korea
| | - Hideaki Taguchi
- Medical Mycology Research Center, Chiba University, Chiba, Japan
| | - Katsuhiko Kamei
- Medical Mycology Research Center, Chiba University, Chiba, Japan
| | | | - Suong-Hyu Hyon
- Institute for Frontier Medical Sciences, Kyoto University, Kyoto, Japan
| | - Jong-Chul Park
- Department of Medical Engineering, Yonsei University College of Medicine, Seoul, Korea
- Brain Korea 21 Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
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Kakuta Y, Okumi M, Tsutahara K, Abe T, Yazawa K, Matsumura K, Hyon SH, Takahara S, Nonomura N. 2250 EPIGALLOCATECHIN-3-GALLATE PROTECTS KIDNEYS FROM ISCHEMIA REPERFUSION INJURY BY INHIBITION OF MACROPHAGE INFILTRATION. J Urol 2011. [DOI: 10.1016/j.juro.2011.02.2492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Nakamura T, Shimamoto T, Watanabe S, Shimizu Y, Hyon SH, Ikada Y. Ueber die anwendung von in vivo zersetzbaren polymeren in der thoraxchirurgie. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/masy.19880190116] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Kakuta Y, Okumi M, Isaka Y, Tsutahara K, Abe T, Yazawa K, Ichimaru N, Matsumura K, Hyon SH, Takahara S, Nonomura N. Epigallocatechin-3-gallate protects kidneys from ischemia reperfusion injury by HO-1 upregulation and inhibition of macrophage infiltration. Transpl Int 2011; 24:514-22. [PMID: 21291499 DOI: 10.1111/j.1432-2277.2011.01224.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Epigallocatechin-3-gallate (EGCG) shows diverse chemical and biological activities. We investigated the effects of EGCG in a rat renal ischemia reperfusion (I/R) injury model. Sprague-Dawley rats received intraperitoneal injection of 50 mg/kg EGCG 48 h, 24 h, and 30 min prior to I/R injury. The animals were subjected to left renal occlusion for 45 min. EGCG treatment suppressed the peak in serum creatinine. EGCG-treated kidneys showed significantly less tubular damage and a decreased number of apoptotic cells. The I/R-induced elevation in the renal MDA level was significantly decreased in the EGCG group. Reverse-transcriptase polymerase chain reaction showed that EGCG significantly decreased the expression of MHC class II, TLR2, TLR4, MCP-1, IL-18, TGF-β1, procollagen Ia1, TIMP-1, and Kim-1. ED-1 staining showed reduced macrophage infiltration and α-SMA staining revealed less interstitial expression. Heme oxygenase-1 (HO-1) expression in I/R kidneys was upregulated in the EGCG group based on the results of both RT-PCR and Western blotting analysis. Blockade of HO-1 gene induction by SnPP increased renal tubular damage and macrophage infiltration. These findings suggest that EGCG protects the kidneys against I/R injury by reducing macrophage infiltration and decreasing renal fibrosis. These beneficial effects may be mediated, in part, by augmentation of the HO-1 gene.
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Affiliation(s)
- Yoichi Kakuta
- Department of Urology, Osaka University Graduate School of Medicine, Osaka, Japan
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Yanagi S, Matsumura K, Marui A, Morishima M, Hyon SH, Ikeda T, Sakata R. Oral pretreatment with a green tea polyphenol for cardioprotection against ischemia–reperfusion injury in an isolated rat heart model. J Thorac Cardiovasc Surg 2011; 141:511-7. [DOI: 10.1016/j.jtcvs.2010.04.016] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2010] [Revised: 03/27/2010] [Accepted: 04/16/2010] [Indexed: 01/31/2023]
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