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Choi CR, Kim EJ, Choi TH, Han J, Kang D. Enhancing Human Cutaneous Wound Healing through Targeted Suppression of Large Conductance Ca 2+-Activated K + Channels. Int J Mol Sci 2024; 25:803. [PMID: 38255877 PMCID: PMC10815220 DOI: 10.3390/ijms25020803] [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: 12/12/2023] [Revised: 12/28/2023] [Accepted: 01/04/2024] [Indexed: 01/24/2024] Open
Abstract
The modulation of K+ channels plays a crucial role in cell migration and proliferation, but the effect of K+ channels on human cutaneous wound healing (CWH) remains underexplored. This study aimed to determine the necessity of modulating K+ channel activity and expression for human CWH. The use of 25 mM KCl as a K+ channel blocker markedly improved wound healing in vitro (in keratinocytes and fibroblasts) and in vivo (in rat and porcine models). K+ channel blockers, such as quinine and tetraethylammonium, aided in vitro wound healing, while Ba2+ was the exception and did not show similar effects. Single-channel recordings revealed that the Ba2+-insensitive large conductance Ca2+-activated K+ (BKCa) channel was predominantly present in human keratinocytes. NS1619, an opener of the BKCa channel, hindered wound healing processes like proliferation, migration, and filopodia formation. Conversely, charybdotoxin and iberiotoxin, which are BKCa channel blockers, dramatically enhanced these processes. The downregulation of BKCa also improved CWH, whereas its overexpression impeded these healing processes. These findings underscore the facilitative effect of BKCa channel suppression on CWH, proposing BKCa channels as potential molecular targets for enhancing human cutaneous wound healing.
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Affiliation(s)
- Chang-Rok Choi
- Department of Physiology, College of Medicine, Gyeongsang National University, Jinju 52727, Republic of Korea; (C.-R.C.); (E.-J.K.); (J.H.)
| | - Eun-Jin Kim
- Department of Physiology, College of Medicine, Gyeongsang National University, Jinju 52727, Republic of Korea; (C.-R.C.); (E.-J.K.); (J.H.)
- Institute of Medical Sciences, Gyeongsang National University, Jinju 52727, Republic of Korea
| | - Tae Hyun Choi
- Thenevus Plastic Surgery Clinic, Seoul 07013, Republic of Korea;
| | - Jaehee Han
- Department of Physiology, College of Medicine, Gyeongsang National University, Jinju 52727, Republic of Korea; (C.-R.C.); (E.-J.K.); (J.H.)
| | - Dawon Kang
- Department of Physiology, College of Medicine, Gyeongsang National University, Jinju 52727, Republic of Korea; (C.-R.C.); (E.-J.K.); (J.H.)
- Institute of Medical Sciences, Gyeongsang National University, Jinju 52727, Republic of Korea
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Ha JH, Lee SY, Choi TH, Park SO. Surgical delay increases the survival of expanded random-pattern flap in pediatric patients. Sci Rep 2023; 13:19204. [PMID: 37932369 PMCID: PMC10628270 DOI: 10.1038/s41598-023-45852-3] [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: 05/09/2023] [Accepted: 10/24/2023] [Indexed: 11/08/2023] Open
Abstract
Despite the aid of tissue expansion, the ideal design of random pattern flap is not always available in patients with extensive skin lesions. We investigated the effectiveness of surgical delay on expanded flaps in pediatric patients. Retrospective cohort study was performed on patients who underwent tissue expansion surgery for extensive skin lesions at Seoul National University Children's Hospital. The surgical delay technique was employed for patients with unfavorable flap conditions related to location or transposition angles. The dimensions of skin lesions and flaps were measured based on medical photographs. Fifty patients underwent a total of 66 tissue expansion procedures (49 conventional procedures among 41 patients, 17 surgical delay procedures among 15 patients) from January 2016 to September 2019. Although flaps in the surgical delay group were more narrow-based (p < 0.001), the partial flap loss rate and excised area-to-inflation amount ratio was comparable between the two groups (p = 0.093 and p = 0.194, respectively). Viable flaps, excluding postoperative necrosis, in the surgical delay group were significantly more narrow-based in terms of the length-to-base width ratio and the area-to-base width ratio compared to conventional group (p < 0.01, p < 0.01). Surgical delay can result in outcomes comparable to well-designed random flaps, even in disadvantageous conditions. Patients with large skin lesions but limited areas for expansion may benefit from surgical delay.
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Affiliation(s)
- Jeong Hyun Ha
- Department of Plastic and Reconstructive Surgery, Seoul National University Hospital, Seoul, Republic of Korea.
- Interdisciplinary Program of Medical Informatics, Seoul National University College of Medicine, Seoul, Republic of Korea.
| | - Se Yeon Lee
- Department of Plastic and Reconstructive Surgery, Seoul National University Hospital, Seoul, Republic of Korea
| | - Tae Hyun Choi
- The Nevus Plastic Surgery Clinic, Seoul, Republic of Korea
| | - Seong Oh Park
- Department of Plastic and Reconstructive Surgery, Hanyang University College of Medicine, Seoul, Republic of Korea.
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Kim JY, Choi TH, Kim BJ. Refinements in the pre-expanded distant flap for giant melanocytic nevi of the upper extremity in pediatric patients. Plast Reconstr Surg 2023; Publish Ahead of Print:00006534-990000000-01905. [PMID: 37220387 DOI: 10.1097/prs.0000000000010734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
BACKGROUND Surgical treatment of large and giant congenital melanocytic nevi (GCMN) of the upper extremity is challenging due to limited options for reconstruction. A pre-expanded distant flap is considered an important option in upper extremity reconstruction, where the soft tissue available for use is limited. This study aimed to refine the pre-expanded distant flap after excision of the GCMN in the upper extremity. METHODS Large (>10 cm) and giant (>20 cm) congenital melanocytic nevi of the upper extremities treated with tissue expansion and distant flaps over 10 years were retrospectively reviewed, and the authors describe in detail the surgical strategies for reconstruction of the upper extremity with distant flap. RESULTS From March 2010 to February 2020, 13 patients (mean age: 2.87 years) treated with 17 pre-extended distant flaps were included. The mean flap dimension was 154.87 cm 2, ranging from 15×5 cm to 26.5×11 cm. All surgeries were successfully completed except for one patient with partial flap necrosis. Preconditioning was performed before flap transfer in five patients with larger rotation arcs and flap dimensions. The mean duration of postoperative follow-up was 51.85 months. A new reconstructive protocol was proposed that combined the three elements, including a distant flap, tissue expander, and preconditioning. CONCLUSION In the treatment of GCMN in the upper extremities, careful planning and multiple stages are required. For pediatric patients, the pre-extended distant flap with preconditioning is useful and effective for reconstruction.
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Affiliation(s)
- Ji-Young Kim
- Department of Plastic and Reconstructive Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Tae Hyun Choi
- The Nevus Plastic Surgery Clinic, Seoul, Republic of Korea
| | - Byung Jun Kim
- Department of Plastic and Reconstructive Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea
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Wufuer M, Choi TH, Najmiddinov B, Kim J, Choi J, Kim T, Park Y, Kim JH, Jeon H, Kim BJ. Improving Facial Fat Graft Survival Using Stromal Vascular Fraction-Enriched Lipotransfer: A Prospective Multicenter, Randomized Controlled Study. Plast Reconstr Surg 2023:00006534-990000000-01809. [PMID: 37141448 DOI: 10.1097/prs.0000000000010625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
BACKGROUND Although previous clinical studies have reported that cell-assisted lipotransfer increases the fat survival rate in facial fat transplants, most were case studies without quantitative evaluation. A multi-center, prospective, randomized, controlled study was performed to evaluate the safety and efficacy of the stromal vascular fraction (SVF) in facial fat grafts. METHODS Twenty-three participants were enrolled for autologous fat transfer in the face, and randomly assigned to the experimental ( n =11) and control ( n =12) groups. Fat survival was assessed using magnetic resonance imaging at 6 and 24 weeks postoperatively. Subjective evaluations were performed by the patients and surgeons. To address safety concerns, results of an SVF culture and the postoperative complications were recorded. RESULTS The overall fat survival rate was significantly higher in the experimental group than in the control group (6 weeks: 74.5±9.99% vs. 66.55±13.77%, p <0.025; 24 weeks: 71.27±10.43% vs. 61.98±13.46%, p <0.012). Specifically, graft survival in the forehead was 12.82% higher in the experimental group when compared with that in the control group at 6 weeks ( p <0.023). Furthermore, graft survival in the forehead ( p <0.021) and cheeks ( p <0.035) was superior in the experimental group at 24 weeks. At 24 weeks, the aesthetic scores given by the surgeons were higher in the experimental group than in the control group ( p <0.03); however, no significant intergroup differences were noted in the patient-evaluated scores. Neither bacterial growth from SVF cultures nor postoperative complications were noted. CONCLUSIONS SVF enrichment for autologous fat grafting can be a safe and effective technique for increasing the fat retention rate.
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Affiliation(s)
- Maierdanjiang Wufuer
- Department of Plastic and Reconstructive Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul 03080, Republic of Korea
| | - Tae Hyun Choi
- THENEVUS Plastic Surgery Clinic, Seoul 06120 Republic of Korea
| | - Bakhtiyor Najmiddinov
- Department of Plastic & Reconstructive Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam 13620, Republic of Korea
| | - Junhyung Kim
- Department of Plastic and Reconstructive Surgery, Keimyung University School of Medicine, Daegu 42601, Republic of Korea
| | - Jaehoon Choi
- Department of Plastic and Reconstructive Surgery, Keimyung University School of Medicine, Daegu 42601, Republic of Korea
| | | | | | - Ji-Hoon Kim
- Department of Radiology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul 03080, Republic of Korea
| | - Heejung Jeon
- Department of Plastic and Reconstructive Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul 03080, Republic of Korea
| | - Byung Jun Kim
- Department of Plastic and Reconstructive Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul 03080, Republic of Korea
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Lee CG, Kim DW, Kim J, Uprety LP, Oh KI, Singh S, Yoo J, Jin HS, Choi TH, Park E, Jeong SY. Effects of Loganin on Bone Formation and Resorption In Vitro and In Vivo. Int J Mol Sci 2022; 23:ijms232214128. [PMID: 36430605 PMCID: PMC9696919 DOI: 10.3390/ijms232214128] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 11/11/2022] [Accepted: 11/12/2022] [Indexed: 11/18/2022] Open
Abstract
Osteoporosis is a disease caused by impaired bone remodeling that is especially prevalent in elderly and postmenopausal women. Although numerous chemical agents have been developed to prevent osteoporosis, arguments remain regarding their side effects. Here, we demonstrated the effects of loganin, a single bioactive compound isolated from Cornus officinalis, on osteoblast and osteoclast differentiation in vitro and on ovariectomy (OVX)-induced osteoporosis in mice in vivo. Loganin treatment increased the differentiation of mouse preosteoblast cells into osteoblasts and suppressed osteoclast differentiation in primary monocytes by regulating the mRNA expression levels of differentiation markers. Similar results were obtained in an osteoblast-osteoclast co-culture system, which showed that loganin enhanced alkaline phosphatase (ALP) activity and reduced TRAP activity. In in vivo experiments, the oral administration of loganin prevented the OVX-induced loss of bone mineral density (BMD) and microstructure in mice and improved bone parameters. In addition, loganin significantly increased the serum OPG/RANKL ratio and promoted osteogenic activity during bone remodeling. Our findings suggest that loganin could be used as an alternative treatment to protect against osteoporosis.
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Affiliation(s)
- Chang-Gun Lee
- Department of Medical Genetics, Ajou University School of Medicine, Suwon 16499, Republic of Korea
- Department of Biomedical Sciences, Graduate School of Medicine, Ajou University, Suwon 16499, Republic of Korea
- AI-Superconvergence KIURI Translational Research Center, Ajou University School of Medicine, Suwon 16499, Republic of Korea
| | - Do-Wan Kim
- Department of Medical Genetics, Ajou University School of Medicine, Suwon 16499, Republic of Korea
- Department of Medical Sciences, Graduate School of Medicine, Ajou University, Suwon 16499, Republic of Korea
| | - Jeonghyun Kim
- Department of Medical Genetics, Ajou University School of Medicine, Suwon 16499, Republic of Korea
- Department of Biomedical Sciences, Graduate School of Medicine, Ajou University, Suwon 16499, Republic of Korea
| | - Laxmi Prasad Uprety
- Department of Medical Genetics, Ajou University School of Medicine, Suwon 16499, Republic of Korea
- Department of Biomedical Sciences, Graduate School of Medicine, Ajou University, Suwon 16499, Republic of Korea
| | - Kang-Il Oh
- Department of Medical Genetics, Ajou University School of Medicine, Suwon 16499, Republic of Korea
- Department of Biomedical Sciences, Graduate School of Medicine, Ajou University, Suwon 16499, Republic of Korea
| | - Shivani Singh
- Department of Medical Genetics, Ajou University School of Medicine, Suwon 16499, Republic of Korea
- Department of Biomedical Sciences, Graduate School of Medicine, Ajou University, Suwon 16499, Republic of Korea
| | - Jisu Yoo
- Department of Medical Genetics, Ajou University School of Medicine, Suwon 16499, Republic of Korea
- Department of Biomedical Sciences, Graduate School of Medicine, Ajou University, Suwon 16499, Republic of Korea
| | - Hyun-Seok Jin
- Department of Biomedical Laboratory Science, College of Life and Health Sciences, Hoseo University, Asan 31499, Republic of Korea
| | - Tae Hyun Choi
- Department of Molecular Imaging, Korea Institute of Radiological and Medical Sciences, Seoul 01812, Republic of Korea
| | - Eunkuk Park
- Department of Medical Genetics, Ajou University School of Medicine, Suwon 16499, Republic of Korea
- Department of Biomedical Sciences, Graduate School of Medicine, Ajou University, Suwon 16499, Republic of Korea
- Correspondence: (E.P.); (S.-Y.J.); Tel.: +82-31-219-4520 (E.P. & S.-Y.J.); Fax: +82-31-219-4521 (E.P. & S.-Y.J.)
| | - Seon-Yong Jeong
- Department of Medical Genetics, Ajou University School of Medicine, Suwon 16499, Republic of Korea
- Department of Biomedical Sciences, Graduate School of Medicine, Ajou University, Suwon 16499, Republic of Korea
- Correspondence: (E.P.); (S.-Y.J.); Tel.: +82-31-219-4520 (E.P. & S.-Y.J.); Fax: +82-31-219-4521 (E.P. & S.-Y.J.)
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Jeon B, Lim MH, Choi TH, Kang B, Kim S. A development of a graph‐based ensemble machine learning model for skin sensitization hazard and potency assessment. J Appl Toxicol 2022; 42:1832-1842. [DOI: 10.1002/jat.4361] [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] [Received: 04/08/2022] [Revised: 07/01/2022] [Accepted: 07/01/2022] [Indexed: 11/08/2022]
Affiliation(s)
- Byoungjun Jeon
- Interdisciplinary Program in Bioengineering, Graduate School Seoul National University Seoul South Korea
| | - Min Hyuk Lim
- Department of Biomedical Engineering Seoul National University Hospital Seoul South Korea
| | | | - Byeong‐cheol Kang
- Department of Experimental Animal Research, Biomedical Research Institute Seoul National University Hospital Seoul South Korea
- Graduate School of Translational Medicine Seoul National University College of Medicine Seoul South Korea
| | - Sungwan Kim
- Department of Biomedical Engineering Seoul National University College of Medicine Seoul South Korea
- Institute of Bioengineering Seoul National University Seoul South Korea
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Lim C, Choi S, Choi TH, Kang H. Stable internal fixation with dual plate technique for osteoporotic distal femur fractures. Ann Med Surg (Lond) 2022; 75:103374. [PMID: 35242324 PMCID: PMC8861392 DOI: 10.1016/j.amsu.2022.103374] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 01/10/2022] [Revised: 02/03/2022] [Accepted: 02/10/2022] [Indexed: 11/28/2022] Open
Abstract
Background Material and methods Results Conclusion Osteoporotic distal femur fractures are difficult in terms of fracture treatment and recovery. The minimally invasive plate osteosynthesis (MIPO) with the dual plate technique can provide rigid fixation for osteoporotic distal femur fractures. This stable and rigid fixation may allow early mobilization and return to pre-fracture activity in elderly patients. The MIPO with the dual plate technique could be useful treatment option for osteoporotic distal femur fractures.
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Affiliation(s)
- Chaemoon Lim
- Department of Orthopedic Surgery, Jeju National University Hospital, Jeju, South Korea
- Department of Orthopedic Surgery, Jeju National University School of Medicine, Jeju, South Korea
| | - Sungwook Choi
- Department of Orthopedic Surgery, Jeju National University Hospital, Jeju, South Korea
- Department of Orthopedic Surgery, Jeju National University School of Medicine, Jeju, South Korea
| | - Tae Hyun Choi
- Department of Orthopedic Surgery, Jeju National University Hospital, Jeju, South Korea
| | - Hyunseong Kang
- Department of Orthopedic Surgery, Jeju National University Hospital, Jeju, South Korea
- Department of Orthopedic Surgery, Jeju National University School of Medicine, Jeju, South Korea
- Corresponding author. Department of Orthopedic Surgery, Jeju National University Hospital, Jeju, South Korea.
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Kim JY, Jeon JH, Choi TH, Kim BJ. Risk of Malignant Transformation Arising From Giant Congenital Melanocytic Nevi: A 20-year Single-center Study. Dermatol Surg 2022; 48:171-175. [PMID: 34935754 DOI: 10.1097/dss.0000000000003341] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Although giant congenital melanocytic nevus (GCMN) is regarded as premalignant, the incidence and risk factors of malignant transformation are controversial. OBJECTIVE This study aimed to share the authors' surgical experience with GCMNs and provide data on their demographics, malignant transformation, and prognosis. METHODS This single-center, consecutive study included 152 patients with GCMN who visited this center from March 2000 to February 2020. Their medical documentation was reviewed retrospectively, and the nevi were classified according to the size as follows: Group 1, 10 to 19.9 cm (n = 45); Group 2, 20 to 39.9 cm (n = 62); and Group 3, ≥40 cm (n = 45). RESULTS Seven malignancies were found (4.6%; 4 melanomas, 2 rhabdomyosarcomas [RMS], and 1 malignant peripheral nerve sheath tumor [MPNST]). The risk increased according to the nevus size (2.2% in Group 1, 3.2% in Group 2, and 8.9% in Group 3) but the difference was not statistically significant (p = .3305). CONCLUSION Malignant transformation from GCMN cannot be ignored. It can include transformation into melanoma, RMS, and MPNST. Early surgical resection and regular follow-up should be performed in patients with nevi ≥10 cm.
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Affiliation(s)
- Ji-Young Kim
- Department of Plastic and Reconstructive Surgery, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Ji Hui Jeon
- Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Tae Hyun Choi
- The Nevus Plastic Surgery Clinic, Seoul, Republic of Korea
| | - Byung Jun Kim
- Department of Plastic and Reconstructive Surgery, Seoul National University College of Medicine, Seoul, Republic of Korea
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Lee SW, Kim JY, Hong KY, Choi TH, Kim BJ, Kim S. The effect of biphasic calcium phosphate and demineralized bone matrix on tooth eruption in mongrel dogs. Arch Craniofac Surg 2021; 22:239-246. [PMID: 34732035 PMCID: PMC8568493 DOI: 10.7181/acfs.2021.00325] [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: 07/23/2021] [Accepted: 10/20/2021] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND Bone grafts can provide an optimal environment for permanent tooth to erupt and enhance the stability of the alveolar maxilla. Although autologous bone is an optimal source for osteogenesis, its inevitable donor site morbidity has led to active research on bone substitutes. This study was designed to evaluate the safety and feasibility of using biphasic calcium phosphate (BCP; Osteon) as a bone substitute in dogs. METHODS Bilateral third and fourth premolars of four 15-week-old mongrel dogs were used. All teeth were extracted except the third premolar of the right mandible, which was used as a control. After extraction of the premolars, each dog was administered BCP (Osteon), demineralized bone matrix (DBM; DBX), and no graft in the hollow sockets of the right fourth premolar, left fourth premolar, and left third premolar, respectively. Radiographs were taken at 2-week intervals to check for tooth eruption. After 8 weeks, each dog was sacrificed, and tooth and bone biopsies were performed to check for the presence of tooth and bone substitute particle remnants. RESULTS Four weeks after the operation, permanent tooth eruptions had started at all the extraction sites in each dog. Eight weeks after the operation, all teeth had normally erupted, and histological examination revealed BCP particles at the right fourth premolar. CONCLUSION In all four dogs, no delay in the eruption of the teeth or shape disfigurement of permanent teeth was observed on gross inspection and radiologic evaluation. On histological examination, most of the BCP and DBM were replaced by new bone. Bone substitutes can be used as graft materials in patients with alveolar clefts.
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Affiliation(s)
- Si Woo Lee
- Si Woo Aesthetic Plastic Surgery Clinic, Seoul, Korea
| | - Ji-Young Kim
- Division of Pediatric Plastic Surgery, Seoul National University Children's Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Ki Yong Hong
- Division of Pediatric Plastic Surgery, Seoul National University Children's Hospital, Seoul National University College of Medicine, Seoul, Korea
| | | | - Byung Jun Kim
- Division of Pediatric Plastic Surgery, Seoul National University Children's Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Sukwha Kim
- Department of Plastic Surgery, CHA Bundang Medical Center, Seongnam, Korea
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Lee D, Wufuer M, Kim I, Choi TH, Kim BJ, Jung HG, Jeon B, Lee G, Jeon OH, Chang H, Yoon DS. Sequential dual-drug delivery of BMP-2 and alendronate from hydroxyapatite-collagen scaffolds for enhanced bone regeneration. Sci Rep 2021; 11:746. [PMID: 33436904 PMCID: PMC7804460 DOI: 10.1038/s41598-020-80608-3] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [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: 10/13/2020] [Accepted: 12/22/2020] [Indexed: 12/18/2022] Open
Abstract
The clinical use of bioactive molecules in bone regeneration has been known to have side effects, which result from uncontrolled and supraphysiological doses. In this study, we demonstrated the synergistic effect of two bioactive molecules, bone morphogenic protein-2 (BMP-2) and alendronate (ALN), by releasing them in a sequential manner. Collagen-hydroxyapatite composite scaffolds functionalized using BMP-2 are loaded with biodegradable microspheres where ALN is encapsulated. The results indicate an initial release of BMP-2 for a few days, followed by the sequential release of ALN after two weeks. The composite scaffolds significantly increase osteogenic activity owing to the synergistic effect of BMP-2 and ALN. Enhanced bone regeneration was identified at eight weeks post-implantation in the rat 8-mm critical-sized defect. Our findings suggest that the sequential delivery of BMP-2 and ALN from the scaffolds results in a synergistic effect on bone regeneration, which is unprecedented. Therefore, such a system exhibits potential for the application of cell-free tissue engineering.
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Affiliation(s)
- Dongtak Lee
- School of Biomedical Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Maierdanjiang Wufuer
- Department of Plastic and Reconstructive Surgery, College of Medicine, Seoul National University, Seoul, 03080, Republic of Korea
| | - Insu Kim
- School of Biomedical Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Tae Hyun Choi
- Department of Plastic and Reconstructive Surgery, College of Medicine, Seoul National University, Seoul, 03080, Republic of Korea
| | - Byung Jun Kim
- Department of Plastic and Reconstructive Surgery, College of Medicine, Seoul National University, Seoul, 03080, Republic of Korea
| | - Hyo Gi Jung
- School of Biomedical Engineering, Korea University, Seoul, 02841, Republic of Korea.,Interdisciplinary Program in Precision Public Health, Korea University, Seoul, 02841, Republic of Korea
| | - Byoungjun Jeon
- Interdisciplinary Program in Bioengineering, Graduate School, Seoul National University, Seoul, 03080, Republic of Korea
| | - Gyudo Lee
- Department of Biotechnology and Bioinformatics, Korea University, Sejong, 30019, Republic of Korea
| | - Ok Hee Jeon
- Department of Biomedical Sciences, College of Medicine, Korea University, Seoul, 02841, Republic of Korea
| | - Hak Chang
- Department of Plastic and Reconstructive Surgery, College of Medicine, Seoul National University, Seoul, 03080, Republic of Korea.
| | - Dae Sung Yoon
- School of Biomedical Engineering, Korea University, Seoul, 02841, Republic of Korea. .,Interdisciplinary Program in Precision Public Health, Korea University, Seoul, 02841, Republic of Korea.
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Park E, Kim J, Jin HS, Choi CW, Choi TH, Choi S, Huh D, Jeong SY. Scopolin Attenuates Osteoporotic Bone Loss in Ovariectomized Mice. Nutrients 2020; 12:nu12113565. [PMID: 33233714 PMCID: PMC7699886 DOI: 10.3390/nu12113565] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 11/17/2020] [Accepted: 11/18/2020] [Indexed: 11/29/2022] Open
Abstract
Bone remodeling is a renewal process regulated by bone synthesis (osteoblasts) and bone destruction (osteoclasts). A previous study demonstrated that Lycii radicis cortex (LRC) extract inhibited ovariectomized (OVX)-induced bone loss in mice. This study investigated the anti-osteoporotic effects of bioactive constituent(s) from the LRC extract. The effective compound(s) were screened, and a single compound, scopolin, which acts as a phytoalexin, was chosen as a candidate component. Scopolin treatment enhanced alkaline phosphatase activity and increased mineralized nodule formation in MC3T3-E1 pre-osteoblastic cells. However, osteoclast differentiation in primary-cultured monocytes was reduced by treatment with scopolin. Consistently, scopolin treatment increased osteoblast differentiation in the co-culture of monocytes (osteoclasts) and MC3T3-E1 (osteoblast) cells. Scopolin treatment prevented bone mineral density loss in OVX-induced osteoporotic mice. These results suggest that scopolin could be a therapeutic bioactive constituent for the treatment and prevention of osteoporosis.
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Affiliation(s)
- Eunkuk Park
- Department of Medical Genetics, Ajou University School of Medicine, Suwon 16499, Korea; (E.P.); (J.K.)
- Department of Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon 16499, Korea
| | - Jeonghyun Kim
- Department of Medical Genetics, Ajou University School of Medicine, Suwon 16499, Korea; (E.P.); (J.K.)
- Department of Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon 16499, Korea
| | - Hyun-Seok Jin
- Department of Biomedical Laboratory Science, College of Life and Health Sciences, Hoseo University, Asan 31499, Korea;
| | - Chun Whan Choi
- Natural Products Research Institute, Gyeonggi Institute of Science & Technology Promotion, Suwon 16229, Korea;
| | - Tae Hyun Choi
- Department of Molecular Imaging, Korea Institute of Radiological and Medical Sciences, Seoul 01812, Korea;
| | - Sangho Choi
- International Biological Material Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Korea;
| | - Dam Huh
- Dongwoodang Pharmacy Co. Ltd., Yeongchen 38819, Korea;
| | - Seon-Yong Jeong
- Department of Medical Genetics, Ajou University School of Medicine, Suwon 16499, Korea; (E.P.); (J.K.)
- Department of Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon 16499, Korea
- Correspondence: ; Tel.: +82-31-219-4520
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12
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Jeon B, Lee G, Wufuer M, Huang Y, Choi Y, Kim S, Choi TH. Enhanced predictive capacity using dual-parameter chip model that simulates physiological skin irritation. Toxicol In Vitro 2020; 68:104955. [DOI: 10.1016/j.tiv.2020.104955] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 07/16/2020] [Accepted: 07/28/2020] [Indexed: 12/18/2022]
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13
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Ham J, Kim Y, An T, Kang S, Ha C, Wufue M, Kim Y, Jeon B, Kim S, Kim J, Choi TH, Seo JH, Kim DW, Park JU, Lee Y. Covalently Grafted 2-Methacryloyloxyethyl Phosphorylcholine Networks Inhibit Fibrous Capsule Formation around Silicone Breast Implants in a Porcine Model. ACS Appl Mater Interfaces 2020; 12:30198-30212. [PMID: 32574031 DOI: 10.1021/acsami.0c07629] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The surface of human silicone breast implants is covalently grafted at a high density with a 2-methacryloyloxyethyl phosphorylcholine (MPC)-based polymer. Addition of cross-linkers is essential for enhancing the density and mechanical durability of the MPC graft. The MPC graft strongly inhibits not only adsorption but also the conformational deformation of fibrinogen, resulting in the exposure of a buried amino acid sequence, γ377-395, which is recognized by inflammatory cells. Furthermore, the numbers of adhered macrophages and the amounts of released cytokines (MIP-1α, MIP-1β, IL-8, TNFα, IL-1α, IL-1β, and IL-10) are dramatically decreased when the MPC network is introduced at a high density on the silicone surface (cross-linked PMPC-silicone). We insert the MPC-grafted human silicone breast implants into Yorkshire pigs to analyze the in vivo effect of the MPC graft on the capsular formation around the implants. After 6 month implantation, marked reductions of inflammatory cell recruitment, inflammatory-related proteins (TGF-β and myeloperoxidase), a myoblast marker (α-smooth muscle actin), vascularity-related factors (blood vessels and VEGF), and, most importantly, capsular thickness are observed on the cross-linked PMPC-silicone. We propose a mechanism of the MPC grafting effect on fibrous capsular formation around silicone implants on the basis of the in vitro and in vivo results.
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Affiliation(s)
- Jiyeon Ham
- Department of Chemistry, College of Natural Sciences, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Youngmin Kim
- Interdisciplinary Program in Stem Cell Biology, College of Medicine, Seoul National University, 101 Daehak-ro, Jongno-gu, Seoul 03080, Republic of Korea
- Department of Plastic and Reconstructive Surgery, Institute of Human-Environment Interface Biology, College of Medicine, Seoul National University, 101 Daehak-ro, Jongno-gu, Seoul 03080, Republic of Korea
| | - Taeyang An
- Department of Chemistry, College of Natural Sciences, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Sunah Kang
- Department of Chemistry, College of Natural Sciences, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Cheolmin Ha
- Department of Plastic and Reconstructive Surgery, Institute of Human-Environment Interface Biology, College of Medicine, Seoul National University, 101 Daehak-ro, Jongno-gu, Seoul 03080, Republic of Korea
| | - Maierdanjiang Wufue
- Department of Plastic and Reconstructive Surgery, Institute of Human-Environment Interface Biology, College of Medicine, Seoul National University, 101 Daehak-ro, Jongno-gu, Seoul 03080, Republic of Korea
| | - Yumin Kim
- Department of Chemistry, College of Natural Sciences, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Byoungjun Jeon
- Interdisciplinary Program in Bioengineering, College of Engineering, Seoul National University, 101 Daehak-ro, Jongno-gu, Seoul 03080, Republic of Korea
| | - Seulah Kim
- Department of Chemistry, College of Natural Sciences, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Jungah Kim
- Department of Chemistry, College of Natural Sciences, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Tae Hyun Choi
- Department of Plastic and Reconstructive Surgery, Institute of Human-Environment Interface Biology, College of Medicine, Seoul National University, 101 Daehak-ro, Jongno-gu, Seoul 03080, Republic of Korea
| | - Ji-Hun Seo
- Department of Materials Science and Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Dae Woo Kim
- Department of Otolaryngology-Head and Neck Surgery, Seoul National University Boramae Medical Center, 5 Gil 20, Boramae-ro, Dongjak-gu, Seoul 07061, Republic of Korea
| | - Ji-Ung Park
- Department of Plastic and Reconstructive Surgery, Seoul National University Boramae Hospital, 5 Gil 20, Boramae-ro, Dongjak-gu, Seoul 07061, Republic of Korea
| | - Yan Lee
- Department of Chemistry, College of Natural Sciences, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 08826, Republic of Korea
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Kang S, Kim J, Kim S, Wufuer M, Park S, Kim Y, Choi D, Jin X, Kim Y, Huang Y, Jeon B, Choi TH, Park JU, Lee Y. Efficient reduction of fibrous capsule formation around silicone breast implants densely grafted with 2-methacryloyloxyethyl phosphorylcholine (MPC) polymers by heat-induced polymerization. Biomater Sci 2020; 8:1580-1591. [DOI: 10.1039/c9bm01802f] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This article presents the efficacy of heat-induced MPC-grafting against excessive fibrous capsule formation and related inflammation in tissues surrounding silicone breast implants inserted in a pig model.
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15
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Kim BS, Choi JY, Ju JE, Choi TH. P157 - Assessment of de-fluorination of [18F]MEFWAY in liver fractions. Drug Metab Pharmacokinet 2020. [DOI: 10.1016/j.dmpk.2020.04.158] [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: 10/23/2022]
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16
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Kim Y, Choi WS, Choi EJ, Jeon B, Kim J, Park GH, Huang Y, Wufuer M, Jin X, Kim MO, Xu L, Piao YL, Park JH, Kim WK, Choi TH. Evaluation of fatty acids in groomed fingerprint by gas chromatographic analysis using various extraction solvents and treatment methods. J Anal Sci Technol 2019. [DOI: 10.1186/s40543-019-0188-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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17
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Jeon B, Kim MO, Kim YS, Han HY, Yun JH, Kim J, Huang Y, Choi Y, Cho CH, Kang BC, Kim S, Choi TH. Optimization and validation of a method to identify skin sensitization hazards using IL-1 α and IL-6 secretion from HaCaT. Toxicol In Vitro 2019; 61:104589. [DOI: 10.1016/j.tiv.2019.104589] [Citation(s) in RCA: 3] [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] [Received: 04/15/2019] [Revised: 06/28/2019] [Accepted: 07/01/2019] [Indexed: 10/26/2022]
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18
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Seo MJ, Park JH, Lee KC, Lee YJ, Lee TS, Choi TH, Lee SW, Kim KI, Kang JH. Small Animal PET Imaging of hTERT RNA-Targeted HSV1-tk Gene Expression with Trans-Splicing Ribozyme. Cancer Biother Radiopharm 2019; 35:26-32. [PMID: 31746630 DOI: 10.1089/cbr.2019.2839] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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: 12/22/2022] Open
Abstract
Background: Trans-splicing ribozymes (TSR) are useful anticancer agents targeting cancer-specific transcripts and replacing the RNA to induce anticancer gene expression specifically and selectively in cancer cells. Similar to other gene therapy methods, it is also important to evaluate the transgene expression for target specificity and ribozyme activity. Materials and Methods: In this study, the authors performed in vivo small animal positron emission tomography (PET) imaging and biodistribution assay to evaluate human telomerase reverse transcriptase (hTERT) RNA-targeting-specific TSR, which directs the expression of herpes simplex virus type 1 thymidine kinase (HSV1-tk) gene selectively in hTERT-positive tumors through targeted RNA replacement of the hTERT transcript. Results: The hTERT RNA-targeted HSV1-tk expression with TSR was monitored by PET imaging with 124I labeled 2'-fluoro-2'-deoxy-1-β-D-arabinofuranosyl-5-iodouracil, which is one of the thymidine derivatives acting as substrates for HSV1-tk, in hTERT-positive tumor-bearing mice. Conclusions: Imaging of hTERT RNA-targeted HSV1-tk expression by TSR could be used in the development of advanced gene therapy using tumor-specific TSR.
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Affiliation(s)
- Min-Jung Seo
- Division of Applied RI, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Ju Hui Park
- Division of Applied RI, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Kyo Chul Lee
- Division of Applied RI, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Yong Jin Lee
- Division of Applied RI, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Tae Sup Lee
- Division of Applied RI, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Tae Hyun Choi
- Division of Applied RI, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Seong-Wook Lee
- Department of Integrated Life Sciences, Research Institute of Advanced Omics, Dankook University, Yongin, Korea
| | - Kwang Il Kim
- Division of Applied RI, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Joo Hyun Kang
- Division of Applied RI, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
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19
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Kim Y, Choi WS, Jeon B, Choi TH. The Effect of Temperature and Exposure Time on Stability of Cholesterol and Squalene in Latent Fingermarks Deposited on PVDF Membrane. J Forensic Sci 2019; 65:458-464. [PMID: 31658376 DOI: 10.1111/1556-4029.14209] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 06/17/2019] [Revised: 09/01/2019] [Accepted: 09/16/2019] [Indexed: 11/29/2022]
Abstract
Cholesterol and squalene are fatty materials of latent fingermarks that can be utilized for dating methodologies and visualization techniques. Previous studies have suggested these compounds undergo degradation in fingermarks as a function of time (days) and light at ambient temperature. However, studies assessing how their composition changes at low and high temperatures over short periods of time (hours) have not been published previously. Here, we performed quantitative analysis of cholesterol and squalene in natural fingermark residue using PVDF membrane, after exposure to a range of temperatures (-20 to 100°C) for 4 and 8 h. We found that levels of both fatty materials remained constant at -20 to 60°C, but both showed significant reduction at 100°C, over short exposure times. These results indicate that cholesterol and squalene are detectable at -20 to 60°C, whereas at 100°C or higher, both are lost due to rapid thermal degradation.
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Affiliation(s)
- Youngmin Kim
- Interdisciplinary Program in Stem Cell Biology, College of Medicine, Seoul National University, 101 Daehak-ro, Jongno-gu, Seoul, 03080, South Korea.,Department of Plastic and Reconstructive Surgery, Institute of Human-Environment Interface Biology, College of Medicine, Seoul National University, 101 Daehak-ro, Jongno-gu, Seoul, 03080, South Korea
| | - Won-Sil Choi
- Chromatography Laboratory, National Instrumentation Center for Environmental Management, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul, 08826, South Korea
| | - Byoungjun Jeon
- Department of Plastic and Reconstructive Surgery, Institute of Human-Environment Interface Biology, College of Medicine, Seoul National University, 101 Daehak-ro, Jongno-gu, Seoul, 03080, South Korea.,Interdisciplinary Program in Bioengineering, College of Engineering, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul, 08826, South Korea
| | - Tae Hyun Choi
- Department of Plastic and Reconstructive Surgery, Institute of Human-Environment Interface Biology, College of Medicine, Seoul National University, 101 Daehak-ro, Jongno-gu, Seoul, 03080, South Korea
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20
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Kang S, Park GH, Kim S, Kim J, Choi Y, Huang Y, Lee Y, Choi TH. Antibiotic Delivery: In Vitro and In Vivo Antimicrobial Activity of Antibiotic‐Conjugated Carriers with Rapid pH‐Responsive Release Kinetics (Adv. Healthcare Mater. 14/2019). Adv Healthc Mater 2019. [DOI: 10.1002/adhm.201970058] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Sunyoung Kang
- Department of ChemistrySeoul National University Seoul 08826 Republic of Korea
| | - Gee Ho Park
- Interdisciplinary Program in Stem Cell BiologySeoul National University Seoul 03080 Republic of Korea
| | - Seulah Kim
- Department of ChemistrySeoul National University Seoul 08826 Republic of Korea
| | - Jungah Kim
- Department of ChemistrySeoul National University Seoul 08826 Republic of Korea
| | - Yoonhwa Choi
- Department of Chemistry & EducationSeoul National University Seoul 08826 Republic of Korea
| | - Yan Huang
- Interdisciplinary Program in Stem Cell BiologySeoul National University Seoul 03080 Republic of Korea
| | - Yan Lee
- Department of ChemistrySeoul National University Seoul 08826 Republic of Korea
| | - Tae Hyun Choi
- Interdisciplinary Program in Stem Cell BiologySeoul National University Seoul 03080 Republic of Korea
- Department of Plastic and Reconstructive SurgeryInstitute of Human–Environment Interface BiologySeoul National University Seoul 03080 Republic of Korea
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21
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Kang S, Park GH, Kim S, Kim J, Choi Y, Huang Y, Lee Y, Choi TH. In Vitro and In Vivo Antimicrobial Activity of Antibiotic-Conjugated Carriers with Rapid pH-Responsive Release Kinetics. Adv Healthc Mater 2019; 8:e1900247. [PMID: 31081217 DOI: 10.1002/adhm.201900247] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 02/25/2019] [Revised: 04/26/2019] [Indexed: 11/06/2022]
Abstract
Two representative antibiotics, cephradine (CP) and moxifloxacin (MX), are covalently conjugated with a β-cyclodextrin (β-CD)-based carrier via pH-responsive 1-methyl-2-(2'-carboxyethyl) maleic acid amide (MCM) linkers with excellent conjugation efficiency via simple mixing. At pH 5.5, 90% and 80% of the CP and MX, respectively, are released from the carriers within 30 min, in contrast with the much-delayed release profile at pH 7.4. The in vitro inhibitory effect of β-CD-MCM-CP on the growth of Staphylococcus aureus is significantly lower than that of free CP at pH 7.4, but it reaches the level of free CP at pH 5.5. Moreover, S. aureus develops significant CP resistance after pretreatment with free CP, whereas the initial CP sensitivity is maintained after pretreatment with β-CD-MCM-CP at pH 7.4. However, β-CD-MCM-MX exhibits no such pH-responsive activity against Bacteroides fragilis, probably due to the insufficient stability of the MX conjugation at pH 7.4. In nondiabetic and diabetic mouse models, β-CD-MCM-CP significantly reduces the subcutaneous abscess scores and the bacterial counts in the abscess, although this represents only a marginal improvement in antimicrobial activity compared to free CP.
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Affiliation(s)
- Sunyoung Kang
- Department of ChemistrySeoul National University Seoul 08826 Republic of Korea
| | - Gee Ho Park
- Interdisciplinary Program in Stem Cell BiologySeoul National University Seoul 03080 Republic of Korea
| | - Seulah Kim
- Department of ChemistrySeoul National University Seoul 08826 Republic of Korea
| | - Jungah Kim
- Department of ChemistrySeoul National University Seoul 08826 Republic of Korea
| | - Yoonhwa Choi
- Department of Chemistry & EducationSeoul National University Seoul 08826 Republic of Korea
| | - Yan Huang
- Interdisciplinary Program in Stem Cell BiologySeoul National University Seoul 03080 Republic of Korea
| | - Yan Lee
- Department of ChemistrySeoul National University Seoul 08826 Republic of Korea
| | - Tae Hyun Choi
- Interdisciplinary Program in Stem Cell BiologySeoul National University Seoul 03080 Republic of Korea
- Department of Plastic and Reconstructive SurgeryInstitute of Human–Environment Interface BiologySeoul National University Seoul 03080 Republic of Korea
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22
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Jeon B, Jeong B, Jee S, Huang Y, Kim Y, Park GH, Kim J, Wufuer M, Jin X, Kim SW, Choi TH. A Facial Recognition Mobile App for Patient Safety and Biometric Identification: Design, Development, and Validation. JMIR Mhealth Uhealth 2019; 7:e11472. [PMID: 30958275 PMCID: PMC6475824 DOI: 10.2196/11472] [Citation(s) in RCA: 18] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Revised: 12/30/2018] [Accepted: 01/27/2019] [Indexed: 11/21/2022] Open
Abstract
Background Patient verification by unique identification is an important procedure in health care settings. Risks to patient safety occur throughout health care settings by failure to correctly identify patients, resulting in the incorrect patient, incorrect site procedure, incorrect medication, and other errors. To avoid medical malpractice, radio-frequency identification (RFID), fingerprint scanners, iris scanners, and other technologies have been implemented in care settings. The drawbacks of these technologies include the possibility to lose the RFID bracelet, infection transmission, and impracticality when the patient is unconscious. Objective The purpose of this study was to develop a mobile health app for patient identification to overcome the limitations of current patient identification alternatives. The development of this app is expected to provide an easy-to-use alternative method for patient identification. Methods We have developed a facial recognition mobile app for improved patient verification. As an evaluation purpose, a total of 62 pediatric patients, including both outpatient and inpatient, were registered for the facial recognition test and tracked throughout the facilities for patient verification purpose. Results The app was developed to contain 5 main parts: registration, medical records, examinations, prescriptions, and appointments. Among 62 patients, 30 were outpatients visiting plastic surgery department and 32 were inpatients reserved for surgery. Whether patients were under anesthesia or unconscious, facial recognition verified all patients with 99% accuracy even after a surgery. Conclusions It is possible to correctly identify both outpatients and inpatients and also reduce the unnecessary cost of patient verification by using the mobile facial recognition app with great accuracy. Our mobile app can provide valuable aid to patient verification, including when the patient is unconscious, as an alternative identification method.
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Affiliation(s)
- Byoungjun Jeon
- Interdisciplinary Program for Bioengineering, Graduate School, Seoul National University, Seoul, Republic of Korea
| | | | | | - Yan Huang
- Interdisciplinary Program in Stem Cell Biology, College of Medicine, Seoul National University, Seoul, Republic of Korea
| | - Youngmin Kim
- Interdisciplinary Program in Stem Cell Biology, College of Medicine, Seoul National University, Seoul, Republic of Korea
| | - Gee Ho Park
- Interdisciplinary Program in Stem Cell Biology, College of Medicine, Seoul National University, Seoul, Republic of Korea
| | - Jungah Kim
- Department of Chemistry, Seoul National University College of Natural Sciences, Seoul, Republic of Korea
| | - Maierdanjiang Wufuer
- Department of Plastic and Reconstructive Surgery, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Xian Jin
- Department of Plastic and Reconstructive Surgery, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Sang Wha Kim
- Department of Plastic and Reconstructive Surgery, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Tae Hyun Choi
- Institute of Human Environment Interface Biology, Department of Plastic and Reconstructive Surgery, Seoul National University College of Medicine, Seoul, Republic of Korea
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23
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Kim BS, Yoon DH, Choi TH, Kang JH. Distribution and excretion of a new oral formulation of docetaxel in mice. Drug Metab Pharmacokinet 2019. [DOI: 10.1016/j.dmpk.2018.09.121] [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: 11/26/2022]
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Yi HG, Choi YJ, Jung JW, Jang J, Song TH, Chae S, Ahn M, Choi TH, Rhie JW, Cho DW. Three-dimensional printing of a patient-specific engineered nasal cartilage for augmentative rhinoplasty. J Tissue Eng 2019; 10:2041731418824797. [PMID: 30728937 PMCID: PMC6351972 DOI: 10.1177/2041731418824797] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 12/23/2018] [Indexed: 12/11/2022] Open
Abstract
Autologous cartilages or synthetic nasal implants have been utilized in augmentative rhinoplasty to reconstruct the nasal shape for therapeutic and cosmetic purposes. Autologous cartilage is considered to be an ideal graft, but has drawbacks, such as limited cartilage source, requirements of additional surgery for obtaining autologous cartilage, and donor site morbidity. In contrast, synthetic nasal implants are abundantly available but have low biocompatibility than the autologous cartilages. Moreover, the currently used nasal cartilage grafts involve additional reshaping processes, by meticulous manual carving during surgery to fit the diverse nose shape of each patient. The final shapes of the manually tailored implants are highly dependent on the surgeons' proficiency and often result in patient dissatisfaction and even undesired separation of the implant. This study describes a new process of rhinoplasty, which integrates three-dimensional printing and tissue engineering approaches. We established a serial procedure based on computer-aided design to generate a three-dimensional model of customized nasal implant, and the model was fabricated through three-dimensional printing. An engineered nasal cartilage implant was generated by injecting cartilage-derived hydrogel containing human adipose-derived stem cells into the implant containing the octahedral interior architecture. We observed remarkable expression levels of chondrogenic markers from the human adipose-derived stem cells grown in the engineered nasal cartilage with the cartilage-derived hydrogel. In addition, the engineered nasal cartilage, which was implanted into mouse subcutaneous region, exhibited maintenance of the exquisite shape and structure, and striking formation of the cartilaginous tissues for 12 weeks. We expect that the developed process, which combines computer-aided design, three-dimensional printing, and tissue-derived hydrogel, would be beneficial in generating implants of other types of tissue.
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Affiliation(s)
- Hee-Gyeong Yi
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Korea
| | - Yeong-Jin Choi
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang, Korea
| | - Jin Woo Jung
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Korea
| | - Jinah Jang
- Department of Creative IT Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Korea
- School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology (POSTECH), Pohang, Korea
| | - Tae-Ha Song
- Medical Device Development Center, Daegu-Gyeongbuk Medical Innovation Foundation (DGMIF), Daegu, Korea
| | - Suhun Chae
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Korea
| | - Minjun Ahn
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Korea
| | - Tae Hyun Choi
- Department of Plastic and Reconstructive Surgery and Institute of Human Environment Interface Biology, Seoul National University Children’s Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - Jong-Won Rhie
- Department of Plastic Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Dong-Woo Cho
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Korea
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Shin B, Ha J, Lee M, Park K, Park GH, Choi TH, Cho KJ, Kim HY. Hygrobot: A self-locomotive ratcheted actuator powered by environmental humidity. Sci Robot 2018; 3:3/14/eaar2629. [DOI: 10.1126/scirobotics.aar2629] [Citation(s) in RCA: 201] [Impact Index Per Article: 33.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Accepted: 01/03/2018] [Indexed: 12/31/2022]
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26
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Kim BS, Kim JG, Jeon SJ, Yoon DH, Choi TH. Kinetic estimation of 131 I labeled anti-EGFR antibody for development of a radioimmunotherapeutic agent based on an organ distribution study in tumor bearing mice using 125 I-cetuximab. Drug Metab Pharmacokinet 2018. [DOI: 10.1016/j.dmpk.2017.11.282] [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: 10/18/2022]
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27
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An HY, Hong KT, Kang HJ, Choi JY, Hong C, Kim HY, Choi TH, Kang CH, Kim HS, Cheon JE, Park SH, Park JD, Park KD, Shin HY. Malignant peripheral nerve sheath tumor in children: A single-institute retrospective analysis. Pediatr Hematol Oncol 2017; 34:468-477. [PMID: 29286874 DOI: 10.1080/08880018.2017.1408730] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Malignant peripheral nerve sheath tumors are rare tumors that originate from Schwann cells. Patients with neurofibromatosis type 1 are prone to develop these tumors. Due to their rarity and lack of established treatment, the prognosis of malignant peripheral nerve sheath tumors is poor. A retrospective study was conducted on children treated for malignant peripheral nerve sheath tumors at the Seoul National University Children's Hospital between 2007 and 2016. Eleven patients were diagnosed with malignant nerve sheath tumors at a median age of 12 years, eight of whom had neurofibromatosis type 1. All the patients underwent chemotherapy and received surgical resection, and 5 patients relapsed. The 2-year overall survival rate was 72.7%, and the 2-year event-free survival rate was 58.2%. Univariate analysis was performed to assess the correlations between the clinical factors. There was no statistically significant difference in the overall survival rate according to the patients' clinical factors. However, there was a decreasing trend in the relationship between the event-free survival rate and the prevalence of neurofibromatosis type 1. Regular follow up of neurofibromatosis type 1. Regular follow-up of neurofibromatosis type 1 patients may identify detection of early relapse of malignant peripheral nerve sheath tumors. Genetic studies of these patients and tumors may identify opportunities for targeted therapy.
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Affiliation(s)
- Hong Yul An
- a Department of Pediatrics , Seoul National University College of Medicine , Seoul , Korea.,b Cancer Research Institute , Seoul National University College of Medicine , Seoul , Korea
| | - Kyung Taek Hong
- a Department of Pediatrics , Seoul National University College of Medicine , Seoul , Korea
| | - Hyoung Jin Kang
- a Department of Pediatrics , Seoul National University College of Medicine , Seoul , Korea
| | - Jung Yoon Choi
- a Department of Pediatrics , Seoul National University College of Medicine , Seoul , Korea.,b Cancer Research Institute , Seoul National University College of Medicine , Seoul , Korea
| | - CheRy Hong
- a Department of Pediatrics , Seoul National University College of Medicine , Seoul , Korea
| | - Hyun-Young Kim
- c Department of Surgery , Seoul National University College of Medicine , Seoul , Korea
| | - Tae Hyun Choi
- d Department of Plastic and Reconstructive Surgery , Seoul National University College of Medicine , Seoul , Korea
| | - Chang Hyun Kang
- e Department of Thoracic and Cardiovascular Surgery , Seoul National University Hospital , Seoul National University College of Medicine , Seoul , Korea
| | - Han-Soo Kim
- f Department of Orthopedic Surgery , Seoul National University College of Medicine , Seoul , Korea
| | - Jung-Eun Cheon
- g Department of Radiology, Seoul National University College of Medicine , Seoul National University Children's Hospital , Seoul , Korea
| | - Sung-Hye Park
- h Department of Pathology , Seoul National University, College of Medicine , Seoul , Korea
| | - June Dong Park
- a Department of Pediatrics , Seoul National University College of Medicine , Seoul , Korea
| | - Kyung Duk Park
- a Department of Pediatrics , Seoul National University College of Medicine , Seoul , Korea
| | - Hee Young Shin
- a Department of Pediatrics , Seoul National University College of Medicine , Seoul , Korea
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An HY, Baek SM, Kim BK, Choi JY, Hong KT, Hong CR, Choi TH, Kim HS, Kim TM, Kang HJ, Shin HY. Clinical Features and Treatment Outcome of Soft Tissue Clear Cell Sarcoma. Clin Pediatr Hematol Oncol 2017. [DOI: 10.15264/cpho.2017.24.2.114] [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] Open
Affiliation(s)
- Hong Yul An
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Korea
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Seung Min Baek
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Korea
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Bo Kyung Kim
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Korea
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Jung Yoon Choi
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Korea
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Kyung Taek Hong
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Korea
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Che Ry Hong
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Korea
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Tae Hyun Choi
- Department of Plastic and Reconstructive Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - Han-Soo Kim
- Department of Orthopedic Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - Tae Min Kim
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Hyoung Jin Kang
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Korea
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Hee Young Shin
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Korea
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
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Kim KH, Choi TH, Choi Y, Park YW, Hong KY, Kim DY, Choe YS, Lee H, Cheon JE, Park JB, Park KD, Kang HJ, Shin HY, Jeong JH. Comparison of Efficacy and Safety Between Propranolol and Steroid for Infantile Hemangioma: A Randomized Clinical Trial. JAMA Dermatol 2017; 153:529-536. [PMID: 28423174 DOI: 10.1001/jamadermatol.2017.0250] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Importance There are limited data from randomized clinical trials comparing propranolol and steroid medication for treatment of infantile hemangioma (IH). Objective To determine the efficacy and safety of propranolol compared with steroid as a first-line treatment for IH. Design, Setting, and Participants This randomized clinical noninferiority trial tested the efficacy and safety of propranolol vs steroid treatment for IH at a single academic hospital. All participants were diagnosed with IH between June 2013 and October 2014, had normal heart function, and had not been previously treated for IH. Interventions The participants were randomly assigned to either the propranolol group or the steroid group. In the propranolol group, the patients were admitted, observed for adverse effects for 3 days after treatment initiation, and then released and treated as outpatients for 16 weeks (2 mg/kg/d). In the steroid group, the patients were seen as outpatients from the beginning and were also treated for 16 weeks (2 mg/kg/d). Main Outcomes and Measures The primary efficacy variable was the response to treatment at 16 weeks, which was evaluated by the hemangioma volume using magnetic resonance imaging before and at 16 weeks after treatment initiation. While comparing the effect of medication between the groups, we monitored the adverse effects of both drugs. Results A total of 34 patients (15 boys, 19 girls; mean age, 3.3 months; range, 0.3-8.2 months) were randomized to receive either propranolol or steroid treatment (17 in each treatment group). Guardians for 2 patients in the steroid group withdrew their consent, and 1 patient in the propranolol group did not complete the efficacy test. The intention-to-treat analysis, applying multiple imputations, found the treatment response rate in the propranolol group to be 95.65%, and that of the steroid group was 91.94%. Because the difference in response rate between the groups was 3.71%, propranolol was considered noninferior. We found that there was no difference between the groups in safety outcomes. Conclusions and Relevance Our trial demonstrated that propranolol was not inferior to steroid with respect to therapeutic effects in IH. Trial Registration clinicaltrials.gov Identifier: NCT01908972.
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Affiliation(s)
- Kyu Han Kim
- Department of Dermatology, Seoul National University College of Medicine, Seoul, Republic of Korea2Institute of Human-Environment Interface Biology, Seoul National University Medical Research Center, Seoul, Republic of Korea3Laboratory of Cutaneous Aging and Hair Research, Biomedical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea
| | - Tae Hyun Choi
- Department of Plastic and Reconstructive Surgery, Institute of Human-Environment Interface Biology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Yunhee Choi
- Division of Medical Statistics, Medical Research Collaborating Center, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Republic of Korea
| | - Young Woon Park
- Department of Dermatology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Ki Yong Hong
- Department of Plastic and Reconstructive Surgery, Seoul National University Hospital, Seoul, Republic of Korea
| | - Dong Young Kim
- Department of Dermatology, Seoul National University College of Medicine, Seoul, Republic of Korea2Institute of Human-Environment Interface Biology, Seoul National University Medical Research Center, Seoul, Republic of Korea3Laboratory of Cutaneous Aging and Hair Research, Biomedical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea
| | - Yun Seon Choe
- Department of Dermatology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Hyunjung Lee
- Department of Plastic and Reconstructive Surgery, Institute of Human-Environment Interface Biology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Jung-Eun Cheon
- Department of Radiology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Jung-Bin Park
- Department of Medicine, Seoul National University School of Medicine (Master Course), Seoul, Republic of Korea
| | - Kyung Duk Park
- Department of Pediatrics, Cancer Research Institute, Seoul National University College of Medicine, Seoul National University Children's Hospital, Seoul, Republic of Korea
| | - Hyoung Jin Kang
- Department of Pediatrics, Cancer Research Institute, Seoul National University College of Medicine, Seoul National University Children's Hospital, Seoul, Republic of Korea
| | - Hee Young Shin
- Department of Pediatrics, Cancer Research Institute, Seoul National University College of Medicine, Seoul National University Children's Hospital, Seoul, Republic of Korea
| | - Jae Hoon Jeong
- Department of Plastic and Reconstructive Surgery, Seoul National University Bundang Hospital, Gyeonggi, Republic of Korea
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Kim BJ, Park JK, Kim BK, Park SJ, Kim MK, Lee CW, Choi LM, Hur JA, Kim SH, Beom J, Kim JY, Oh BM, Choi TH, Kim S. Oligomeric Procyanidins (OPCs) Inhibit Procollagen Type I Secretion of Fibroblasts. Tissue Eng Regen Med 2017; 14:297-306. [PMID: 30603486 PMCID: PMC6171594 DOI: 10.1007/s13770-017-0038-1] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Revised: 09/01/2016] [Accepted: 09/05/2016] [Indexed: 10/20/2022] Open
Abstract
Wound healing is composed of a complex process that requires harmonies of various cell populations where fibroblasts play the main role. Oligomeric procyanidins (OPC) are main components of grape (Vitis vinifera) seed extracts, and recent studies showed OPC's effects on inflammation, cell migration, and proliferation. We investigated the effect of OPC on fibroblasts to regulate wound healing process. Human dermal fibroblast known as Hs27 cells were treated with various concentrations of OPC (0, 2.5, 5, 10, and 20 μg/μl). Cell cytotoxicity was evaluated by the Cell Counting Kit assay, and the expression levels of secreted procollagen were analyzed. Procollagen levels in OPC treated cells exposed to transforming growth factor beta 1 (TGF-β1) or ascorbic acid were evaluated using Western blot and immunocytochemistry. Relative mRNA expressions of procollagen, molecular chaperone such as HSP47, P4H were determined by real-time PCR in OPC treated cells. OPC showed no cytotoxicity on Hs27 cells at every concentration but inhibited procollagen secretion in a dose-dependent manner. The inhibitory effect also appeared under TGF-β1 induced collagen overproduction. Immunocytochemistry showed that higher levels of intracytoplasmic procollagen were accumulated in TGF-β1 treatment group, whereas ascorbic acid induced a release of accumulated procollagen under OPC treatment. The mRNA expressions of procollagen, molecular chaperone were not affected by OPC, but procollagen level was increased when exposed to TGF-β1. OPC inhibits procollagen secretion from fibroblasts with no effects on cell proliferations even under the environment of TGF-β1-induced collagen overproduction. OPC could regulate the diseases and symptoms of abnormal overabundant collagen production.
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Affiliation(s)
- Byung Jun Kim
- Department of Plastic and Reconstructive Surgery, College of Medicine, Seoul National University, 103 Daehak-ro, Jongno-gu, Seoul, 03080 Korea
| | - Jung-Keun Park
- Faceplus Aesthetic Clinic, 856 Eonju-ro, Gangnam-gu, Seoul, 06017 Korea
| | - Byeong Kyu Kim
- Department of Plastic and Reconstructive Surgery, College of Medicine, Seoul National University, 103 Daehak-ro, Jongno-gu, Seoul, 03080 Korea
| | - Soo Jin Park
- Department of Plastic and Reconstructive Surgery, College of Medicine, Seoul National University, 103 Daehak-ro, Jongno-gu, Seoul, 03080 Korea
| | - Min Kyung Kim
- Department of Plastic and Reconstructive Surgery, College of Medicine, Seoul National University, 103 Daehak-ro, Jongno-gu, Seoul, 03080 Korea
| | - Chang-won Lee
- Hana Academy Seoul, 535 Yeonseo-ro, Eunpyeong-gu, Seoul, 03305 Korea
| | - La Mee Choi
- Department of Plastic and Reconstructive Surgery, College of Medicine, Seoul National University, 103 Daehak-ro, Jongno-gu, Seoul, 03080 Korea
| | - Ji An Hur
- Department of Internal Medicine, School of Medicine, Yeungnam University, 170 Hyeonchung-ro, Nam-gu, Daegu, 42415 Korea
| | - Sang Hyon Kim
- Department of Internal Medicine, Keimyung University Dongsan Medical Center, 56 Dalseong-ro, Daegu, 41931 Korea
| | - Jaewon Beom
- Department of Rehabilitation Medicine, Chungnam National University Hospital, 282 Munhwa-ro, Jung-gu, Daejeon, 35015 Korea
- Department of Biomedical Engineering, College of Medicine, Seoul National University, 103 Daehak-ro, Jongno-gu, Seoul, 03080 Korea
| | - Jung Yoon Kim
- Department of Rehabilitation Medicine, Dankook University Hospital, 119 Dandae-ro, Cheonan, 31116 Korea
| | - Byung-Mo Oh
- Department of Rehabilitation Medicine, College of Medicine, Seoul National University, 103 Daehak-ro, Jongno-gu, Seoul, 03080 Korea
| | - Tae Hyun Choi
- Department of Plastic and Reconstructive Surgery, Institute of Human Environment Interface Biology, College of Medicine, Seoul National University, 103 Daehak-ro, Jongno-gu, Seoul, 03080 Korea
- Department of Plastic and Reconstructive Surgery, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, 03080 Korea
| | - Sukwha Kim
- Department of Plastic and Reconstructive Surgery, Institute of Human Environment Interface Biology, College of Medicine, Seoul National University, 103 Daehak-ro, Jongno-gu, Seoul, 03080 Korea
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Hur W, Lee HY, Min HS, Wufuer M, Lee CW, Hur JA, Kim SH, Kim BK, Choi TH. Regeneration of full-thickness skin defects by differentiated adipose-derived stem cells into fibroblast-like cells by fibroblast-conditioned medium. Stem Cell Res Ther 2017; 8:92. [PMID: 28427476 PMCID: PMC5399413 DOI: 10.1186/s13287-017-0520-7] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [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: 06/25/2016] [Revised: 01/26/2017] [Accepted: 02/24/2017] [Indexed: 01/08/2023] Open
Abstract
Background Fibroblasts are ubiquitous cells in the human body and are absolutely necessary for wound healing such as for injured skin. This role of fibroblasts was the reason why we aimed to differentiate human adipose-derived stem cells (hADSCs) into fibroblasts and to test their wound healing potency. Recent reports on hADSC-derived conditioned medium have indicated stimulation of collagen synthesis as well as migration of dermal fibroblasts in wound sites with these cells. Similarly, human fibroblast-derived conditioned medium (F-CM) was reported to contain a variety of factors known to be important for growth of skin. However, it remains unknown whether and how F-CM can stimulate hADSCs to secrete type I collagen. Methods In this study, we obtained F-CM from the culture of human skin fibroblast HS27 cells in DMEM media. For an in-vivo wound healing assay using cell transplantation, balb/c nude mice with full-thickness skin wound were used. Results Our data showed that levels of type I pro-collagen secreted by hADSCs cultured in F-CM increased significantly compared with hADSCs kept in normal medium for 72 h. In addition, from a Sircol collagen assay, the amount of collagen in F-CM-treated hADSC conditioned media (72 h) was markedly higher than both the normal medium-treated hADSC conditioned media (72 h) and the F-CM (24 h). We aimed to confirm that hADSCs in F-CM would differentiate into fibroblast cells in order to stimulate wound healing in a skin defect model. To investigate whether F-CM induced hADSCs into fibroblast-like cells, we performed FACS analysis and verified that both F-CM-treated hADSCs and HS27 cells contained similar expression patterns for CD13, CD54, and CD105, whereas normal medium-treated hADSCs were significantly different. mRNA level analysis for Nanog, Oct4A, and Sox2 as undifferentiation markers and vimentin, HSP47, and desmin as matured fibroblast markers supported the characterization that hADSCs in F-CM were highly differentiated into fibroblast-like cells. To discover the mechanism of type I pro-collagen expression in hADSCs in F-CM, we observed that phospho-smad 2/3 levels were increased in the TGF-β/Smad signaling pathway. For in-vivo analysis, we injected various cell types into balb/c nude mouse skin carrying a 10-mm punch wound, and observed a significantly positive wound healing effect in this full-thickness excision model with F-CM-treated hADSCs rather than with untreated hADSCs or the PBS injected group. Conclusions We differentiated F-CM-treated hADSCs into fibroblast-like cells and demonstrated their efficiency in wound healing in a skin wound model.
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Affiliation(s)
- Woojune Hur
- Department of Plastic and Reconstructive Surgery, Institute of Human-Environment Interface Biology, Seoul National University College of Medicine, Seoul, 110-799, Republic of Korea.,Biomedical Research Institute, Seoul National University Hospital, Seoul, 110-744, Republic of Korea
| | - Hoon Young Lee
- Department of Plastic and Reconstructive Surgery, Institute of Human-Environment Interface Biology, Seoul National University College of Medicine, Seoul, 110-799, Republic of Korea
| | - Hye Sook Min
- Department of Preventive Medicine, Graduate School of Public Health, Seoul National University, Seoul, 152-742, Republic of Korea
| | - Maierdanjiang Wufuer
- Department of Plastic and Reconstructive Surgery, Institute of Human-Environment Interface Biology, Seoul National University College of Medicine, Seoul, 110-799, Republic of Korea.,Biomedical Research Institute, Seoul National University Hospital, Seoul, 110-744, Republic of Korea
| | - Chang-Won Lee
- Department of Naval Architecture and Ocean Engineering, College of Engineering, Seoul National University 110-744, Seoul, Republic of Korea
| | - Ji An Hur
- Department of Internal Medicine, School of Medicine, Yeungnam University, Daegu, 712-749, Republic of Korea
| | - Sang Hyon Kim
- Department of Internal Medicine, Keimyung University Dongsan Medical Center, Daegu, 700-712, Republic of Korea
| | - Byeung Kyu Kim
- Department of Plastic and Reconstructive Surgery, Institute of Human-Environment Interface Biology, Seoul National University College of Medicine, Seoul, 110-799, Republic of Korea.,Biomedical Research Institute, Seoul National University Hospital, Seoul, 110-744, Republic of Korea
| | - Tae Hyun Choi
- Department of Plastic and Reconstructive Surgery, Institute of Human-Environment Interface Biology, Seoul National University College of Medicine, Seoul, 110-799, Republic of Korea.
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Kim MS, Yu JH, Kim CH, Choi JY, Seo JH, Lee MY, Yi CH, Choi TH, Ryu YH, Lee JE, Lee BH, Kim H, Cho SR. Environmental enrichment enhances synaptic plasticity by internalization of striatal dopamine transporters. J Cereb Blood Flow Metab 2016; 36:2122-2133. [PMID: 26661218 PMCID: PMC5363660 DOI: 10.1177/0271678x15613525] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Revised: 09/20/2015] [Accepted: 09/21/2015] [Indexed: 12/20/2022]
Abstract
Environmental enrichment (EE) with a complex combination of physical, cognitive and social stimulations enhances synaptic plasticity and behavioral function. However, the mechanism remains to be elucidated in detail. We aimed to investigate dopamine-related synaptic plasticity underlying functional improvement after EE. For this, six-week-old CD-1 mice were randomly allocated to EE or standard conditions for two months. EE significantly enhanced behavioral functions such as rotarod and ladder walking tests. In a [18F]FPCIT positron emission tomography scan, binding values of striatal DAT were significantly decreased approximately 18% in the EE mice relative to the control mice. DAT inhibitor administrated to establish the relationship of the DAT down-regulation to the treatment effects also improved rotarod performances, suggesting that DAT inhibition recapitulated EE-mediated treatment benefits. Next, EE-induced internalization of DAT was confirmed using a surface biotinylation assay. In situ proximity ligation assay and immunoprecipitation demonstrated that EE significantly increased the phosphorylation of striatal DAT as well as the levels of DAT bound with protein kinase C (PKC). In conclusion, we suggest that EE enables phosphorylation of striatal DAT via a PKC-mediated pathway and causes DAT internalization. This is the first report to suggest an EE-mediated mechanism of synaptic plasticity by internalization of striatal DAT.
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Affiliation(s)
- Myung-Sun Kim
- Department and Research Institute of Rehabilitation Medicine, Yonsei University College of Medicine, Seoul, Korea.,Yonsei Stem Cell Center, Avison Biomedical Research Center, Seoul, Korea
| | - Ji Hea Yu
- Department and Research Institute of Rehabilitation Medicine, Yonsei University College of Medicine, Seoul, Korea.,Department of Medical Science, The Graduate School, Yonsei University, Seoul, Korea.,Brain Korea 21 PLUS Project for Medical Science, Yonsei University, Seoul, Korea
| | - Chul Hoon Kim
- Brain Korea 21 PLUS Project for Medical Science, Yonsei University, Seoul, Korea.,Department of Pharmacology, Yonsei University College of Medicine, Seoul, Korea.,Brain Research Institute, Yonsei University College of Medicine, Seoul, Korea
| | - Jae Yong Choi
- Department of Pharmacology, Yonsei University College of Medicine, Seoul, Korea.,Department of Nuclear Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Jung Hwa Seo
- Department and Research Institute of Rehabilitation Medicine, Yonsei University College of Medicine, Seoul, Korea.,Brain Korea 21 PLUS Project for Medical Science, Yonsei University, Seoul, Korea
| | - Min-Young Lee
- Department and Research Institute of Rehabilitation Medicine, Yonsei University College of Medicine, Seoul, Korea.,Yonsei Stem Cell Center, Avison Biomedical Research Center, Seoul, Korea
| | - Chi Hoon Yi
- Department of Molecular Imaging, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Tae Hyun Choi
- Department of Molecular Imaging, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Young Hoon Ryu
- Department of Nuclear Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Jong Eun Lee
- Brain Korea 21 PLUS Project for Medical Science, Yonsei University, Seoul, Korea.,Brain Research Institute, Yonsei University College of Medicine, Seoul, Korea.,Department of Anatomy, Yonsei University College of Medicine, Seoul, Korea
| | - Bae Hwan Lee
- Brain Korea 21 PLUS Project for Medical Science, Yonsei University, Seoul, Korea.,Brain Research Institute, Yonsei University College of Medicine, Seoul, Korea.,Department of Physiology, Yonsei University College of Medicine, Seoul, Korea
| | - Hyongbum Kim
- Department of Pharmacology, Yonsei University College of Medicine, Seoul, Korea
| | - Sung-Rae Cho
- Department and Research Institute of Rehabilitation Medicine, Yonsei University College of Medicine, Seoul, Korea .,Yonsei Stem Cell Center, Avison Biomedical Research Center, Seoul, Korea.,Brain Korea 21 PLUS Project for Medical Science, Yonsei University, Seoul, Korea.,Rehabilitation Institute of Neuromuscular Disease, Yonsei University College of Medicine, Seoul, Korea
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Kim MH, Hur W, Choi G, Min HS, Choi TH, Choy YB, Choy JH. Bone Remodeling: Theranostic Bioabsorbable Bone Fixation Plate with Drug-Layered Double Hydroxide Nanohybrids (Adv. Healthcare Mater. 21/2016). Adv Healthc Mater 2016. [DOI: 10.1002/adhm.201670113] [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: 11/08/2022]
Affiliation(s)
- Myung Hun Kim
- Center for Intelligent Nano-Bio Materials (CINBM); Department of Chemistry and Nano Science; Ewha Womans University; Seoul 03760 Republic of Korea
- Interdisciplinary Program in Bioengineering; College of Engineering; Seoul National University; Seoul 08826 Republic of Korea
| | - Woojune Hur
- Biomedical Research Institute; Seoul National University Hospital; Seoul 03080 Republic of Korea
- Department of Plastic and Reconstructive Surgery; Institute of Human-Environment Interface Biology; College of Medicine; Seoul National University; Seoul 03080 Republic of Korea
| | - Goeun Choi
- Center for Intelligent Nano-Bio Materials (CINBM); Department of Chemistry and Nano Science; Ewha Womans University; Seoul 03760 Republic of Korea
| | - Hye Sook Min
- Department of Preventive Medicine; Graduate School of Public Health; Seoul National University; Seoul 08826 Korea
| | - Tae Hyun Choi
- Biomedical Research Institute; Seoul National University Hospital; Seoul 03080 Republic of Korea
- Department of Plastic and Reconstructive Surgery; Institute of Human-Environment Interface Biology; College of Medicine; Seoul National University; Seoul 03080 Republic of Korea
| | - Young Bin Choy
- Interdisciplinary Program in Bioengineering; College of Engineering; Seoul National University; Seoul 08826 Republic of Korea
- Institute of Medical and Biological Engineering; Medical Research Center and Department of Biomedical Engineering; College of Medicine; Seoul National University; Seoul 03080 Republic of Korea
| | - Jin-Ho Choy
- Center for Intelligent Nano-Bio Materials (CINBM); Department of Chemistry and Nano Science; Ewha Womans University; Seoul 03760 Republic of Korea
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Kim MH, Hur W, Choi G, Min HS, Choi TH, Choy YB, Choy JH. Theranostic Bioabsorbable Bone Fixation Plate with Drug-Layered Double Hydroxide Nanohybrids. Adv Healthc Mater 2016; 5:2765-2775. [PMID: 27723270 DOI: 10.1002/adhm.201600761] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [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: 07/13/2016] [Revised: 08/21/2016] [Indexed: 01/08/2023]
Abstract
A bioabsorbable polymeric bone plate enabled with both diagnostic and therapeutic functionalities (radiopacity and sustained drug release, respectively) is proposed. To this end, a drug-inorganic nanohybrid (RS-LDH) is examined as a theranostic agent by intercalating an anti-resorptive bone remodeling drug, risedronate (RS) into a layered double hydroxide (LDH) via an ion-exchange reaction. The RS-LDH is prepared as a sheet with a biodegradable polymer, poly(lactic-co-glycolic acid), and is then attached onto the clinically approved bioabsorbable bone plate to produce the theranostic plate. Because of the presence of the metals in the LDH, the theranostic plate results in discernible in vivo X-ray images for up to four weeks after implantation. Concurrently, bone regeneration is also significantly improved compared with the other control groups, likely because of this material's sustained drug-release property. The theranostic plate is also largely biocompatible, similar to the plate already approved for clinical use. It is concluded that the combination of a biodegradable bone plate with RS-LDH nanohybrids can constitute a promising system with theranostic ability in both X-ray diagnosis and expedited bone repair.
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Affiliation(s)
- Myung Hun Kim
- Center for Intelligent Nano-Bio Materials (CINBM); Department of Chemistry and Nano Science; Ewha Womans University; Seoul 03760 Republic of Korea
- Interdisciplinary Program in Bioengineering; College of Engineering; Seoul National University; Seoul 08826 Republic of Korea
| | - Woojune Hur
- Biomedical Research Institute; Seoul National University Hospital; Seoul 03080 Republic of Korea
- Department of Plastic and Reconstructive Surgery; Institute of Human-Environment Interface Biology; College of Medicine; Seoul National University; Seoul 03080 Republic of Korea
| | - Goeun Choi
- Center for Intelligent Nano-Bio Materials (CINBM); Department of Chemistry and Nano Science; Ewha Womans University; Seoul 03760 Republic of Korea
| | - Hye Sook Min
- Department of Preventive Medicine; Graduate School of Public Health; Seoul National University; Seoul 08826 Korea
| | - Tae Hyun Choi
- Biomedical Research Institute; Seoul National University Hospital; Seoul 03080 Republic of Korea
- Department of Plastic and Reconstructive Surgery; Institute of Human-Environment Interface Biology; College of Medicine; Seoul National University; Seoul 03080 Republic of Korea
| | - Young Bin Choy
- Interdisciplinary Program in Bioengineering; College of Engineering; Seoul National University; Seoul 08826 Republic of Korea
- Institute of Medical and Biological Engineering; Medical Research Center and Department of Biomedical Engineering; College of Medicine; Seoul National University; Seoul 03080 Republic of Korea
| | - Jin-Ho Choy
- Center for Intelligent Nano-Bio Materials (CINBM); Department of Chemistry and Nano Science; Ewha Womans University; Seoul 03760 Republic of Korea
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Kim EJ, Kim BS, Choi DB, Chi SG, Choi TH. Improved In Vivo Stability of Radioiodinated Rituximab Using an Iodination Linker for Radioimmunotherapy. Cancer Biother Radiopharm 2016; 31:287-294. [PMID: 27689933 DOI: 10.1089/cbr.2016.2047] [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: 11/12/2022] Open
Abstract
PURPOSE Directly radioiodinated [131I]-rituximab has been developed as a radioimmunotherapeutic agent in patients with CD20-positive B cell non-Hodgkin's lymphoma. However, there are concerns over its in vivo catabolism and deiodination. A novel radioiodination linker, N-(4-isothiocyanatobenzyl)-2-(3-(tributylstannyl)phenyl) acetamide (IBPA), was synthesized for the preparation of stable radioiodinated proteins. METHODS The authors evaluated the potential of IBPA as a stable radioiodinated linker for rituximab. [125I]-IBPA was purified and conjugated with rituximab, and in vitro stability testing was performed in serum and liver microsomes. In vivo studies were performed after i.v. injection of [125I]-rituximab or [125I]-IBPA-rituximab to nude mice. RESULTS In in vitro studies, [125I]-IBPA-rituximab was stable in serum and liver microsomes. In static scans, high radioactivity was evident in the thyroid following injection of [125I]-rituximab, but low radioactivity was seen in the thyroid following injection of [125I]-IBPA-rituximab. In biodistribution studies, radioactivity uptake in thyroid glands of [125I]-IBPA-rituximab was decreased by approximately sevenfold compared to [125I]-rituximab. In pharmacokinetics, the half-life of [125I]-rituximab was shorter than that of [125I]-IBPA-rituximab in plasma of nude mice. CONCLUSIONS The authors demonstrate that [125I]-IBPA-rituximab is more stable to metabolic deiodination in vivo than is [125I]-rituximab. Radioiodination of rituximab using IBPA is thus preferable to direct labeling in terms of in vivo stability.
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Affiliation(s)
- Eun Jung Kim
- 1 Korea Drug Development Platform using Radio-Isotope (KDePRI), Korea Institute of Radiological and Medical Sciences , Seoul, Korea.,2 School of Life Sciences and Biotechnology, Korea University , Seoul, Korea
| | - Byoung Soo Kim
- 1 Korea Drug Development Platform using Radio-Isotope (KDePRI), Korea Institute of Radiological and Medical Sciences , Seoul, Korea.,3 Department of Molecular Imaging, Korea Institute of Radiological and Medical Sciences , Seoul, Korea
| | - Dan Bee Choi
- 1 Korea Drug Development Platform using Radio-Isotope (KDePRI), Korea Institute of Radiological and Medical Sciences , Seoul, Korea
| | - Sung-Gil Chi
- 2 School of Life Sciences and Biotechnology, Korea University , Seoul, Korea
| | - Tae Hyun Choi
- 3 Department of Molecular Imaging, Korea Institute of Radiological and Medical Sciences , Seoul, Korea
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Kim BJ, Choi TH, Kim S. Prospective Study on the Intraoperative Blood Loss in Patients with Cleft Palate Undergoing Furlow's Double Opposing Z-Palatoplasty. Cleft Palate Craniofac J 2016; 55:954-958. [PMID: 27618612 DOI: 10.1597/15-278] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Blood loss during cleft palate surgery has been investigated in previous research, but there is no report regarding blood loss when performing Furlow's double opposing Z-plasty (DOZ). In the present study, we evaluated intraoperative blood loss in patients with cleft palate who underwent the DOZ procedure. MATERIALS AND METHODS Intraoperative blood loss was prospectively investigated in 59 patients undergoing palatoplasty with DOZ by a single surgeon between August 2012 and July 2013. Demographic factors and clinical status, including cleft type and palatal gap, were recorded. Blood loss was evaluated by measuring the change in weight of a suction bottle, suction line, and gauze balls. RESULTS Mean blood loss was 16.61 ± 10.33 mL, which accounted for 5% of total blood volume. Male sex, older age, severe cleft type, larger palatal gap, relaxed incision, and increased operative time contributed to greater blood loss. The amount of intraoperative bleeding could be predicted by the following equation: Blood loss = -5.64 + 6.18 (male patients) + 7.58 (severe type cleft) + 0.88 X age (months) + 0.84 X palatal gap (mm). CONCLUSIONS We found that the DOZ technique causes mild blood loss, but bleeding amount tended to increase in older male patients with a severe cleft and a larger palatal gap. The use of relaxed incisions during palatoplasty and prolonged operation times also contributed to greater blood loss.
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Jeon B, Lee C, Kim M, Choi TH, Kim S, Kim S. Fabrication of three-dimensional scan-to-print ear model for microtia reconstruction. J Surg Res 2016; 206:490-497. [PMID: 27884347 DOI: 10.1016/j.jss.2016.08.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [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: 12/30/2015] [Revised: 07/01/2016] [Accepted: 08/02/2016] [Indexed: 01/17/2023]
Abstract
BACKGROUND Microtia is a congenital deformity of the external ear that occurs in 1 of every 5000 births. Microtia reconstruction using traditional two-dimensional templates does not provide highly detailed ear shapes. Here, we describe the feasibility of using a three-dimensional (3D) ear model as a reference. MATERIALS AND METHODS Seven children aged from 11 to 16 (6 grade III and 1 grade II microtia) were recruited from Seoul National University Children's Hospital, Korea. We generated 3D-computer-aided design models of each patient's ear by performing 3D laser scanning for a mirror-transformed cast of their normal ear. The 3D-printed ear model was used in microtia reconstruction surgery following the Nagata technique, and its shape was compared with the casted ear model. RESULTS One patient experienced irritation caused by accidently pouring resin into the external auditory meatus, and another had minor skin necrosis; both complications were successfully treated. The average percentage differences of the superior, inferior, anterior, posterior, and lateral views between the casted and 3D-printed ear models were 1.17%, 1.48%, 1.64%, 1.80%, and 5.44%, respectively (average: 2.31%), where the difference between the casted ear models and traditional two-dimensional templates were 16.03% in average. CONCLUSIONS Our results show that simple microtia reconstruction can be performed using 3D ear models. The 3D-printed ear models of each patient were consistent and accurately represented the thickness, depth, and height of the normal ear. The availability of the 3D-printed ear model in the operating room reduced the amount of unnecessary work during surgery.
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Affiliation(s)
- Byoungjun Jeon
- Interdisciplinary Program for Bioengineering, Seoul National University, Seoul, Korea
| | - Chiwon Lee
- Institute of Medical and Biological Engineering, Seoul National University, Seoul, Korea
| | - Myungjoon Kim
- Interdisciplinary Program for Bioengineering, Seoul National University, Seoul, Korea
| | - Tae Hyun Choi
- Department of Plastic and Reconstructive Surgery, Institute of Human Environment Interface Biology, College of Medicine, Seoul National University, Seoul, Korea.
| | - Sungwan Kim
- Institute of Medical and Biological Engineering, Seoul National University, Seoul, Korea; Department of Biomedical Engineering, College of Medicine, Seoul National University, Seoul, Korea.
| | - Sukwha Kim
- Department of Plastic and Reconstructive Surgery, Institute of Human Environment Interface Biology, College of Medicine, Seoul National University, Seoul, Korea
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Lee HG, Kim H, Kim EJ, Park PG, Dong SM, Choi TH, Kim H, Chong CR, Liu JO, Chen J, Ambinder RF, Hayward SD, Park JH, Lee JM. Targeted therapy for Epstein-Barr virus-associated gastric carcinoma using low-dose gemcitabine-induced lytic activation. Oncotarget 2016; 6:31018-29. [PMID: 26427042 PMCID: PMC4741585 DOI: 10.18632/oncotarget.5041] [Citation(s) in RCA: 20] [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] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Accepted: 08/24/2015] [Indexed: 12/26/2022] Open
Abstract
The constant presence of the viral genome in Epstein-Barr virus (EBV)-associated gastric cancers (EBVaGCs) suggests the applicability of novel EBV-targeted therapies. The antiviral nucleoside drug, ganciclovir (GCV), is effective only in the context of the viral lytic cycle in the presence of EBV-encoded thymidine kinase (TK)/protein kinase (PK) expression. In this study, screening of the Johns Hopkins Drug Library identified gemcitabine as a candidate for combination treatment with GCV. Pharmacological induction of EBV-TK or PK in EBVaGC-originated tumor cells were used to study combination treatment with GCV in vitro and in vivo. Gemcitabine was found to be a lytic inducer via activation of the ataxia telangiectasia-mutated (ATM)/p53 genotoxic stress pathway in EBVaGC. Using an EBVaGC mouse model and a [125I] fialuridine (FIAU)-based lytic activation imaging system, we evaluated gemcitabine-induced lytic activation in an in vivo system and confirmed the efficacy of gemcitabine-GCV combination treatment. This viral enzyme-targeted anti-tumor strategy may provide a new therapeutic approach for EBVaGCs.
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Affiliation(s)
- Hyun Gyu Lee
- Department of Microbiology and Immunology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Hyemi Kim
- Department of Microbiology and Immunology, Yonsei University College of Medicine, Seoul, Republic of Korea.,Brain Korea 21 PLUS Project for Medical Sciences, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Eun Jung Kim
- Radiopharmaceutical Research Team, Korea Institute of Radiological and Medical Sciences, Seoul, Republic of Korea
| | - Pil-Gu Park
- Department of Microbiology and Immunology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Seung Myung Dong
- Research Institute, National Cancer Center, Goyang, Gyeonggi-do, Republic of Korea
| | - Tae Hyun Choi
- Radiopharmaceutical Research Team, Korea Institute of Radiological and Medical Sciences, Seoul, Republic of Korea
| | - Hyunki Kim
- Department of Pathology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Curtis R Chong
- Lowe Center for Thoracic Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts, MA, USA.,Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts, MA, USA
| | - Jun O Liu
- Department of Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Jianmeng Chen
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Richard F Ambinder
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - S Diane Hayward
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Jeon Han Park
- Department of Microbiology and Immunology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Jae Myun Lee
- Department of Microbiology and Immunology, Yonsei University College of Medicine, Seoul, Republic of Korea.,Brain Korea 21 PLUS Project for Medical Sciences, Yonsei University College of Medicine, Seoul, Republic of Korea
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Min HS, Hur W, Lee WS, Choi SY, Min HJ, Lee SH, Choy YB, Choi TH. Acute Biocompatibility of X-ray Visible Bioabsorbable Bone Plate Coated with β-Tricalcium Phosphate and Poly(lactic-co-glycolic acid). Macromol Res 2016. [DOI: 10.1007/s13233-016-4064-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Kim EJ, Kim BS, Choi DB, Chi SG, Choi TH. Enhanced tumor retention of radioiodinated anti-epidermal growth factor receptor antibody using novel bifunctional iodination linker for radioimmunotherapy. Oncol Rep 2016; 35:3159-68. [PMID: 27035553 PMCID: PMC4872277 DOI: 10.3892/or.2016.4706] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [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: 12/17/2015] [Accepted: 01/27/2016] [Indexed: 01/24/2023] Open
Abstract
Radioimmunotherapy (RIT) uses an antibody labeled with a radionuclide to deliver cytotoxic radiation to a target tumor cells. Radioiodine is most commonly employed to prepare radiolabeled proteins (antibodies, peptides) for in vitro and in vivo applications. A major shortcoming of radioiodinated proteins prepared by direct labeling methods is their deiodination in vivo. For the preparation of more stable radioiodinated antibodies, we developed a new linker (N-(4-isothiocyanatobenzyl)-2-(3-(tributylstannyl)phenyl) acetamide (IBPA). This study evaluated the usefulness of IBPA as a linker for the stable radioiodinated internalizing antibody, cetuximab. Directly labeled cetuximab ([125I]-cetuximab) was prepared by the chloramine T method. To prepare indirectly labeled cetuximab using IBPA ([125I]-IBPA-cetuximab), IBPA was radioiodinated using chloramine-T to give N-(4-isothiocyanatobenzyl)-2-(3-[125I]phenyl)acetamide ([125I]-IBPA), which was purified by high performance liquid chromatography. [125I]-IBPA was then conjugated to cetuximab. In vitro target binding and internalizing assays were performed in PC9, LS174T, and FaDu cell lines. In vivo planar images were obtained using an Inveon SPECT scanner 3, 24, 48, and 168 h after i.v. injection of [125I]-cetuximab or [125I]-IBPA-cetuximab in athymic mice bearing LS174T tumor xenografts. Specific binding and internalized radioactivity of [125I]-IBPA-cetuximab were higher than those of [125I]-cetuximab in PC9, LS174T, and FaDu cell lines. In planar images scant radioactivity was evident in thyroid glands after injection of [125I]-IBPA-cetuximab, while a high level of radioactivity was present in thyroid glands after injection of [125I]-cetuximab. Tumor uptake value of [125I]-IBPA-cetuximab was higher than that of [125I]-cetuximab for up to 168 h. [125I]-IBPA-cetuximab is stable and resistant to deiodination in vivo. IBPA is a promising bi-functional linker for radioiodination of internalizing monoclonal antibodies for in vivo applications including radioimmunotherapy.
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Affiliation(s)
- Eun Jung Kim
- Korea Drug Development Platform using Radio-isotope (KDePRI), Korea Institute of Radiological and Medical Sciences, Seoul, Republic of Korea
| | - Byoung Soo Kim
- Korea Drug Development Platform using Radio-isotope (KDePRI), Korea Institute of Radiological and Medical Sciences, Seoul, Republic of Korea
| | - Dan Bee Choi
- Korea Drug Development Platform using Radio-isotope (KDePRI), Korea Institute of Radiological and Medical Sciences, Seoul, Republic of Korea
| | - Sung-Gil Chi
- School of Life Sciences and Biotechnology, Korea University, Seoul, Republic of Korea
| | - Tae Hyun Choi
- Department of Molecular Imaging, Korea Institute of Radiological and Medical Sciences, Seoul, Republic of Korea
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Hur W, Park M, Lee JY, Kim MH, Lee SH, Park CG, Kim SN, Min HS, Min HJ, Chai JH, Lee SJ, Kim S, Choi TH, Choy YB. Bioabsorbable bone plates enabled with local, sustained delivery of alendronate for bone regeneration. J Control Release 2016; 222:97-106. [DOI: 10.1016/j.jconrel.2015.12.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Revised: 11/27/2015] [Accepted: 12/08/2015] [Indexed: 11/15/2022]
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Jung JW, Lee H, Hong JM, Park JH, Shim JH, Choi TH, Cho DW. A new method of fabricating a blend scaffold using an indirect three-dimensional printing technique. Biofabrication 2015; 7:045003. [PMID: 26525821 DOI: 10.1088/1758-5090/7/4/045003] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Due to its simplicity and effectiveness, the physical blending of polymers is considered to be a practical strategy for developing a versatile scaffold having desirable mechanical and biochemical properties. In the present work, an indirect three-dimensional (i3D) printing technique was proposed to fabricate a 3D free-form scaffold using a blend of immiscible materials, such as polycaprolactone (PCL) and gelatin. The i3D printing technique includes 3D printing of a mold and a sacrificial molding process. PCL/chloroform and gelatin/water were physically mixed to prepare the blend solution, which was subsequently injected into the cavity of a 3D printed mold. After solvent removal and gelatin cross-linking, the mold was dissolved to obtain a PCL-gelatin (PG) scaffold, with a specific 3D structure. Scanning electron microscopy and Fourier transform infrared spectroscopy analysis indicated that PCL masses and gelatin fibers in the PG scaffold homogenously coexisted without chemical bonding. Compression tests confirmed that gelatin incorporation into the PCL enhanced its mechanical flexibility and softness, to the point of being suitable for soft-tissue engineering, as opposed to pure PCL. Human adipose-derived stem cells, cultured on a PG scaffold, exhibited enhanced in vitro chondrogenic differentiation and tissue formation, compared with those on a PCL scaffold. The i3D printing technique can be used to blend a variety of materials, facilitating 3D scaffold fabrication for specific tissue regeneration. Furthermore, this convenient and versatile technique may lead to wider application of 3D printing in tissue engineering.
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Affiliation(s)
- Jin Woo Jung
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), San 31, Hyoja-dong, Nam-gu, Pohang, Gyungbuk 790-784, Korea
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Gu GJ, Ahn SI, Kim JS, Hong CY, Lee SC, Chang YT, Choi TH, Kim BS, Youn HS. Suppression of the TRIF-dependent signaling pathway of Toll-like receptor by CDr10b in RAW264.7 macrophages. Int Immunopharmacol 2015; 28:29-33. [DOI: 10.1016/j.intimp.2015.05.017] [Citation(s) in RCA: 5] [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] [Received: 02/05/2015] [Revised: 04/27/2015] [Accepted: 05/10/2015] [Indexed: 02/06/2023]
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Lee M, Ryu YH, Cho WG, Kang YW, Lee SJ, Jeon TJ, Lyoo CH, Kim CH, Kim DG, Lee K, Choi TH, Choi JY. Relationship between dopamine deficit and the expression of depressive behavior resulted from alteration of serotonin system. Synapse 2015; 69:453-60. [DOI: 10.1002/syn.21834] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Revised: 05/07/2015] [Accepted: 06/03/2015] [Indexed: 11/08/2022]
Affiliation(s)
- Minkyung Lee
- Department of Nuclear Medicine; Yonsei University College of Medicine, Gangnam Severance Hospital; Seoul Korea
| | - Young Hoon Ryu
- Department of Nuclear Medicine; Yonsei University College of Medicine, Gangnam Severance Hospital; Seoul Korea
| | - Won Gil Cho
- Department of Anatomy; Yonsei University Wonju College of Medicine; Wonju Korea
| | - Yeo Wool Kang
- Department of Anatomy; Yonsei University Wonju College of Medicine; Wonju Korea
| | - Soo Jin Lee
- Department of Anatomy; Yonsei University Wonju College of Medicine; Wonju Korea
| | - Tae Joo Jeon
- Department of Nuclear Medicine; Yonsei University College of Medicine, Gangnam Severance Hospital; Seoul Korea
| | - Chul Hyoung Lyoo
- Department of Neurology; Yonsei University College of Medicine, Gangnam Severance Hospital; Seoul Korea
| | - Chul Hoon Kim
- Department of Pharmacology; Yonsei University College of Medicine; Seoul, Korea
- Brain Korea 21 plus Project for Medical Science; Yonsei University College of Medicine; Seoul Korea
| | - Dong Goo Kim
- Department of Pharmacology; Yonsei University College of Medicine; Seoul, Korea
- Brain Korea 21 plus Project for Medical Science; Yonsei University College of Medicine; Seoul Korea
| | - Kyochul Lee
- Department of Molecular Imaging; Korea Institute of Radiological and Medical Sciences; Seoul 139-706 Korea
| | - Tae Hyun Choi
- Department of Molecular Imaging; Korea Institute of Radiological and Medical Sciences; Seoul 139-706 Korea
| | - Jae Yong Choi
- Department of Nuclear Medicine; Yonsei University College of Medicine, Gangnam Severance Hospital; Seoul Korea
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Choi JW, Lee JY, Phi JH, Kim SK, Choi TH, Kim S, Wang KC. Cranial distraction osteogenesis: a proposal of minimal consolidation period. Childs Nerv Syst 2015; 31:751-7. [PMID: 25503404 DOI: 10.1007/s00381-014-2607-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2014] [Accepted: 12/01/2014] [Indexed: 11/28/2022]
Abstract
PURPOSE Cranial distraction osteogenesis (DO) has many advantages for correcting skull deformities: Thus, DO is extensively used for the treatment of skull deformities. However, diverse, unexpected complications are associated with this procedure. In this study, we present the surgical outcomes and complications of DO. Moreover, we propose a modified protocol for DO to reduce complications. METHODS This is a retrospective study on managed patients that underwent DO between March 2008 and May 2013. Their clinical courses were reviewed. Distraction protocols were individually inspected, and the final surgical outcomes, including complications, were evaluated. RESULTS During the study period, a total of ten patients (seven boys and three girls) were treated at our institute. The median distraction period was 20.5 days (ranging from 17 to 50 days). The range of total distraction length was 19-22 mm. The median consolidation period was 96 days (ranging from 0 to 343 days). All patients achieved the goals of distraction. At follow-up evaluations, all patients, except one, showed good surgical outcomes in both head shape and neurologic symptoms. There were six patients with wound complications during the treatment period. Among them, the distractors were removed early in three patients. Interestingly, even these three patients, without a sufficient consolidation period, showed good outcomes. CONCLUSIONS Although DO has many merits for correcting skull deformities, it frequently causes severe wound complications. To reduce these complications, we propose a modified protocol with a minimal or even no consolidation period.
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Affiliation(s)
- Jung Won Choi
- Department of Neurosurgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea
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Hae Kang J, Lee M, Hoon Ryu Y, Hyoung Lyoo C, Hoon Kim C, Chul Lee K, Hyun Choi T, Yong Choi J. [18F]FPEB and [18F]FDEGPECO comparative study of mGlu5 quantification in rodent brain. Appl Radiat Isot 2015; 98:103-7. [DOI: 10.1016/j.apradiso.2015.01.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Revised: 01/21/2015] [Accepted: 01/25/2015] [Indexed: 02/01/2023]
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Jeong JH, Fan Y, You GY, Choi TH, Kim S. Improvement of photoaged skin wrinkles with cultured human fibroblasts and adipose-derived stem cells: A comparative study. J Plast Reconstr Aesthet Surg 2015; 68:372-81. [DOI: 10.1016/j.bjps.2014.10.045] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Revised: 09/03/2014] [Accepted: 10/31/2014] [Indexed: 10/24/2022]
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Kim SH, Hur W, Kim JE, Min HJ, Kim S, Min HS, Kim BK, Kim SH, Choi TH, Jung Y. Self-assembling peptide nanofibers coupled with neuropeptide substance P for bone tissue engineering. Tissue Eng Part A 2015; 21:1237-46. [PMID: 25411965 DOI: 10.1089/ten.tea.2014.0472] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The number of patients requiring flat bone transplantation continues to increase worldwide. Cell transplantation has been successfully applied clinically; however, it causes another defect site and the time requirements to harvest cells and expand them are considerable. In this study, KLD12/KLD12-SP (KLD12+KLD12-substance P [SP]) was designed to mimic endogenous tissue-healing processes. The structures of KLD12, KLD12-SP, and KLD12/KLD12-SP were observed by transmission electron microscopy and circular dichroism spectra. KLD12/KLD12-SP nanofibers (5-10 nm) were created under physiological conditions by formation of a β-sheet structure. The ability of mesenchymal stem cells (MSCs) to recruit KLD12/KLD12-SP was observed by using an in vivo fluorescence imaging system. Labeled human bone marrow stromal cells supplied via an intravenous injection were recruited to the scaffold containing KLD12/KLD12-SP. Polylactic acid/beta-tricalcium phosphate (PLA/β-TCP) scaffolds filled with KLD12/KLD12-SP were applied to repair calvarial defects. The composite constructs (groups: defect, PLA/β-TCP, PLA/β-TCP/KLD12, and PLA/β-TCP/KLD12/KLD12-SP) were implanted into rat defect sites. Bone tissue regeneration was evaluated by observing gross morphology by hematoxylin and eosin and Masson's trichrome staining at 12 and 24 weeks after surgery. Gross morphology showed that the defect site was filled with new tissue that was integrated with host tissue in the KLD12/KLD12-SP group. In addition, from the staining data, cells were recruited to the defect site and lacunae structures formed in the KLD12/KLD12-SP group. From these results, the PLA/β-TCP+KLD12/KLD12-SP composite construct was considered for enhancement of bone tissue regeneration without cell transplantation.
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Affiliation(s)
- Su Hee Kim
- 1 Center for Biomaterials, Biomedical Research Institute , Korea Institute of Science and Technology, Seoul, Korea
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Lee M, Ryu YH, Cho WG, Jeon TJ, Lyoo CH, Kang YW, Lee SJ, Kim CH, Kim DG, Kang JH, Seo YB, Yi CH, Lee K, Choi TH, Choi JY. Dopaminergic neuron destruction reduces hippocampal serotonin 1A receptor uptake of trans -[ 18 F]Mefway. Appl Radiat Isot 2014; 94:30-34. [DOI: 10.1016/j.apradiso.2014.06.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Revised: 06/23/2014] [Accepted: 06/25/2014] [Indexed: 11/15/2022]
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Park JU, Ham J, Kim S, Seo JH, Kim SH, Lee S, Min HJ, Choi S, Choi RM, Kim H, Oh S, Hur JA, Choi TH, Lee Y. Alleviation of capsular formations on silicone implants in rats using biomembrane-mimicking coatings. Acta Biomater 2014; 10:4217-25. [PMID: 25020265 DOI: 10.1016/j.actbio.2014.07.007] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Revised: 06/25/2014] [Accepted: 07/07/2014] [Indexed: 02/06/2023]
Abstract
Despite their popular use in breast augmentation and reconstruction surgeries, the limited biocompatibility of silicone implants can induce severe side effects, including capsular contracture - an excessive foreign body reaction that forms a tight and hard fibrous capsule around the implant. This study examines the effects of using biomembrane-mimicking surface coatings to prevent capsular formations on silicone implants. The covalently attached biomembrane-mimicking polymer, poly(2-methacryloyloxyethyl phosphorylcholine) (PMPC), prevented nonspecific protein adsorption and fibroblast adhesion on the silicone surface. More importantly, in vivo capsule formations around PMPC-grafted silicone implants in rats were significantly thinner and exhibited lower collagen densities and more regular collagen alignments than bare silicone implants. The observed decrease in α-smooth muscle actin also supported the alleviation of capsular formations by the biomembrane-mimicking coating. Decreases in inflammation-related cells, myeloperoxidase and transforming growth factor-β resulted in reduced inflammation in the capsular tissue. The biomembrane-mimicking coatings used on these silicone implants demonstrate great potential for preventing capsular contracture and developing biocompatible materials for various biomedical applications.
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Affiliation(s)
- Ji Ung Park
- Department of Plastic and Reconstructive Surgery, Seoul National University Boramae Hospital, 5 Gil 20, Boramae-ro, Dongjak-Gu, Seoul 156-707, Republic of Korea
| | - Jiyeon Ham
- Department of Chemistry, College of Natural Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-747, Republic of Korea
| | - Sukwha Kim
- Department of Plastic and Reconstructive Surgery, Institute of Human-Environment Interface Biology, Seoul National University College of Medicine, 101 Daehak-ro, Jongno-Gu, Seoul 110-744, Republic of Korea
| | - Ji-Hun Seo
- Department of Organic Materials, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda, Tokyo 101-0062, Japan
| | - Sang-Hyon Kim
- Department of Internal Medicine, Keimyung University Dongsan Medical Center, 56 Dalseong-ro, Jung-Gu, Daegu 700-712, Republic of Korea
| | - Seonju Lee
- Department of Chemistry, College of Natural Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-747, Republic of Korea
| | - Hye Jeong Min
- Department of Plastic and Reconstructive Surgery, Institute of Human-Environment Interface Biology, Seoul National University College of Medicine, 101 Daehak-ro, Jongno-Gu, Seoul 110-744, Republic of Korea; Biomedical Research Institute, Seoul National University Hospital, 101 Daehak-ro, Jongno-Gu, Seoul 110-744, Republic of Korea
| | - Sunghyun Choi
- Department of Chemistry, College of Natural Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-747, Republic of Korea
| | - Ra Mi Choi
- Department of Plastic and Reconstructive Surgery, Institute of Human-Environment Interface Biology, Seoul National University College of Medicine, 101 Daehak-ro, Jongno-Gu, Seoul 110-744, Republic of Korea; Biomedical Research Institute, Seoul National University Hospital, 101 Daehak-ro, Jongno-Gu, Seoul 110-744, Republic of Korea
| | - Heejin Kim
- Department of Chemistry, College of Natural Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-747, Republic of Korea
| | - Sohee Oh
- Department of Biostatics, Seoul National University Boramae Hospital, 5 Gil 20, Boramae-ro, Dongjak-Gu, Seoul 156-707, Republic of Korea
| | - Ji An Hur
- Department of Internal Medicine, School of Medicine, Yeungnam University, 280 Daehak-ro, Gyeongsan-si, Gyeongsangbook-do 712-749, Republic of Korea
| | - Tae Hyun Choi
- Department of Plastic and Reconstructive Surgery, Institute of Human-Environment Interface Biology, Seoul National University College of Medicine, 101 Daehak-ro, Jongno-Gu, Seoul 110-744, Republic of Korea.
| | - Yan Lee
- Department of Chemistry, College of Natural Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-747, Republic of Korea.
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