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Kim JH, Park M, Shim JH, Yun WS, Jin S. Multi-scale vascularization strategy for 3D-bioprinted tissue using coaxial core-shell pre-set extrusion bioprinting and biochemical factors. Int J Bioprint 2023; 9:726. [PMID: 37323485 PMCID: PMC10261162 DOI: 10.18063/ijb.726] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 03/01/2023] [Indexed: 06/17/2023] Open
Abstract
Three-dimensional bioprinting is a key technology in bioartificial organ production. However, production of bioartificial organs has significant limitations because it is hard to build vascular structures, especially capillaries, in printed tissue owing to its low resolution. As the vascular structure plays a critical role in delivering oxygen and nutrients to cells and removing metabolic waste, building vascular channels in bioprinted tissue is essential for bioartificial organ production. In this study, we demonstrated an advanced strategy for fabricating multi-scale vascularized tissue using a pre-set extrusion bioprinting technique and endothelial sprouting. Using a coaxial precursor cartridge, mid-scale vasculature-embedded tissue was successfully fabricated. Furthermore, upon generating a biochemical gradient environment in the bioprinted tissue, capillaries were formed in this tissue. In conclusion, this strategy for multi-scale vascularization in bioprinted tissue is a promising technology for bioartificial organ production.
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Affiliation(s)
- Jae-Hun Kim
- Department of Mechanical System Engineering, Graduate School of Knowledge-based Technology and Energy, Tech University of Korea, Siheung-si, Gyeonggi-do, Republic of Korea
| | - Minji Park
- T&R Biofab, Siheung-si, Gyeonggi-do, Republic of Korea
| | - Jin-Hyung Shim
- T&R Biofab, Siheung-si, Gyeonggi-do, Republic of Korea
- Department of Mechanical Engineering, Tech University of Korea, Siheung-si, Gyeonggi-do, Republic of Korea
| | - Won-Soo Yun
- T&R Biofab, Siheung-si, Gyeonggi-do, Republic of Korea
- Department of Mechanical Engineering, Tech University of Korea, Siheung-si, Gyeonggi-do, Republic of Korea
| | - Songwan Jin
- T&R Biofab, Siheung-si, Gyeonggi-do, Republic of Korea
- Department of Mechanical Engineering, Tech University of Korea, Siheung-si, Gyeonggi-do, Republic of Korea
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Joo OY, Kim TH, Kim YS, Roh TS, Lee EJ, Shim JH, Cho HW, Yun IS. Fabrication of 3D-Printed Implant for Two-Stage Ear Reconstruction Surgery and Its Clinical Application. Yonsei Med J 2023; 64:291-296. [PMID: 36996901 PMCID: PMC10067794 DOI: 10.3349/ymj.2022.0547] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 02/05/2023] [Accepted: 02/10/2023] [Indexed: 04/01/2023] Open
Abstract
PURPOSE Ear reconstruction is one of the most difficult areas in the field of reconstructive surgery. Due to limitations of the current practice, a novel method of auricular reconstruction is needed. Major advancements in three-dimensional (3D) printing technique have rendered the process of ear reconstruction more favorable. Herein, we present our experience in designing and clinically using 3D implants in both 1st and 2nd stage ear reconstruction surgery. MATERIALS AND METHODS After obtaining 3D CT data from each patient, a 3D geometric ear model was created using mirroring and segmentation processes. The 3D-printed implant design resembles but does not exactly match the normal ear shape, and can be inserted in harmony with the currently used surgical technique. The 2nd stage implant was designed to minimize dead space and support the posterior ear helix. The 3D implants were finally fabricated with a 3D printing system and used in ear reconstruction surgery in our institute. RESULTS The 3D implants were manufactured for application to the currently used two-stage technique while maintaining the shape of the patient's normal ear. The implants were successfully used for ear reconstruction surgery in microtia patients. A few months later, the 2nd stage implant was used in the 2nd stage operation. CONCLUSION The authors were able to design, fabricate, and apply patient-specific 3D-printed ear implants for 1st and 2nd stage ear reconstruction surgeries. This design, combined with 3D bioprinting technique, may be a future alternative for ear reconstruction.
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Affiliation(s)
- Oh Young Joo
- Department of Plastic & Reconstructive Surgery, Institute of Human Tissue Restoration, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Tae Ho Kim
- Department of Plastic & Reconstructive Surgery, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Young Seok Kim
- Department of Plastic & Reconstructive Surgery, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Tai Suk Roh
- Department of Plastic & Reconstructive Surgery, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Eun-Ju Lee
- Research Institute of T&R Biofab Co.,Ltd, Seongnam, Korea
| | - Jin-Hyung Shim
- Research Institute of T&R Biofab Co.,Ltd, Seongnam, Korea
- Department of Mechanical Engineering, Tech University of Korea, Siheung, Korea
| | | | - In Sik Yun
- Department of Plastic & Reconstructive Surgery, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
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Kang KW, Shim JH, Kim HJ, Kang BJ. Zygomatic arch reconstruction with a patient-specific polycaprolactone/beta-tricalcium phosphate scaffold after parosteal osteosarcoma resection in a dog. Vet Surg 2022; 51:1319-1325. [PMID: 36168884 DOI: 10.1111/vsu.13895] [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] [Received: 04/04/2022] [Revised: 08/11/2022] [Accepted: 09/05/2022] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To describe the surgical application of a 3D-printing-based, patient-specific, biocompatible polycaprolactone/beta-tricalcium phosphate (PCL/β-TCP) scaffold to reconstruct the zygomatic arch after tumor resection in a dog. ANIMAL A 13 year old female spayed Maltese. STUDY DESIGN Case report METHODS: The dog's presenting complaint was swelling ventral to her right eye. A round mass arising from the caudal aspect of the right zygomatic arch was identified by computed tomography (CT). The histopathologic diagnosis was a low-grade spindle-cell tumor. Surgical resection was planned to achieve 5 mm margins. A patient-specific osteotomy guide and polycaprolactone/beta-tricalcium phosphate (PCL/β-TCP) scaffold were produced. Osteotomy, including 30% of total zygomatic arch length, was performed using an oscillating saw aligned with the guide. The scaffold was placed in the defect. Parosteal osteosarcoma was diagnosed based on histopathological examination. Excision was complete, with the closest margin measuring 0.3 mm. RESULTS Mild epiphora, due to surgical site swelling, subsided after 20 days. Tissue formation within and around the porous scaffold was noted on CT 10 months postoperatively, with no evidence of metastasis or local recurrence. Facial conformation appeared symmetrical, and no complications were noted 16 months postoperatively. CONCLUSION The use of a 3D-printing-based, patient-specific, biocompatible PCL/β-TCP scaffold successfully restored the structure and function of the zygomatic arch without complications, even following wide zygomectomy for complete tumor removal.
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Affiliation(s)
- Kyu-Won Kang
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul, South Korea
| | - Jin-Hyung Shim
- Department of Mechanical Engineering, Korea Polytechnic University, Siheung, South Korea.,Research Institute, T&R Biofab Co. Ltd., Siheung, South Korea
| | - Hyun-Jung Kim
- Research Institute, T&R Biofab Co. Ltd., Siheung, South Korea
| | - Byung-Jae Kang
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul, South Korea.,BK21 PLUS Creative Veterinary Research Center, Seoul National University, Seoul, South Korea
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Girardeau-Hubert S, Lynch B, Zuttion F, Label R, Rayee C, Brizion S, Ricois S, Martinez A, Park E, Kim C, Marinho PA, Shim JH, Jin S, Rielland M, Soeur J. Impact of microstructure on cell behavior and tissue mechanics in collagen and dermal decellularized extra-cellular matrices. Acta Biomater 2022; 143:100-114. [PMID: 35235868 DOI: 10.1016/j.actbio.2022.02.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 02/18/2022] [Accepted: 02/22/2022] [Indexed: 11/01/2022]
Abstract
Skin models are used for many applications such as research and development or grafting. Unfortunately, most lack a proper microenvironment producing poor mechanical properties and inaccurate extra-cellular matrix composition and organization. In this report we focused on mechanical properties, extra-cellular matrix organization and cell interactions in human skin samples reconstructed with pure collagen or dermal decellularized extra-cellular matrices (S-dECM) and compared them to native human skin. We found that Full-thickness S-dECM samples presented stiffness two times higher than collagen gel and similar to ex vivo human skin, and proved for the first time that keratinocytes also impact dermal mechanical properties. This was correlated with larger fibers in S-dECM matrices compared to collagen samples and with a differential expression of F-actin, vinculin and tenascin C between S-dECM and collagen samples. This is clear proof of the microenvironment's impact on cell behaviors and mechanical properties. STATEMENT OF SIGNIFICANCE: In vitro skin models have been used for a long time for clinical applications or in vitro knowledge and evaluation studies. However, most lack a proper microenvironment producing a poor combination of mechanical properties and appropriate biological outcomes, partly due to inaccurate extra-cellular matrix (ECM) composition and organization. This can lead to limited predictivity and weakness of skin substitutes after grafting. This study shows, for the first time, the importance of a complex and rich microenvironment on cell behaviors, matrix macro- and micro-organization and mechanical properties. The increased composition and organization complexity of dermal skin decellularized extra-cellular matrix populated with differentiated cells produces in vitro skin models closer to native human skin physiology.
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Hong G, Kim J, Oh H, Yun S, Kim CM, Jeong YM, Yun WS, Shim JH, Jang I, Kim CY, Jin S. Production of Multiple Cell-Laden Microtissue Spheroids with a Biomimetic Hepatic-Lobule-Like Structure. Adv Mater 2021; 33:e2102624. [PMID: 34286875 DOI: 10.1002/adma.202102624] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 06/07/2021] [Indexed: 05/11/2023]
Abstract
The construction of an in vitro 3D cellular model to mimic the human liver is highly desired for drug discovery and clinical applications, such as patient-specific treatment and cell-based therapy in regenerative medicine. However, current bioprinting strategies are limited in their ability to generate multiple cell-laden microtissues with biomimetic structures. This study presents a method for producing hepatic-lobule-like microtissue spheroids using a bioprinting system incorporating a precursor cartridge and microfluidic emulsification system. The multiple cell-laden microtissue spheroids can be successfully generated at a speed of approximately 45 spheroids min-1 and with a uniform diameter. Hepatic and endothelial cells are patterned in a microtissue spheroid with the biomimetic structure of a liver lobule. The spheroids allow long-term culture with high cell viability, and the structural integrity is maintained longer than that of non-structured spheroids. Furthermore, structured spheroids show high MRP2, albumin, and CD31 expression levels. In addition, the in vivo study reveals that structured microtissue spheroids are stably engrafted. These results demonstrate that the method provides a valuable 3D structured microtissue spheroid model with lobule-like constructs and liver functions.
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Affiliation(s)
- Gyusik Hong
- Department of Mechanical Engineering, Korea Polytechnic University, 237 Sangidaehak-ro, Siheung-si, 15073, Republic of Korea
| | - Jin Kim
- Laboratory Animal Medicine, College of Veterinary Medicine, Seoul National University, 1, Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
- College of Veterinary Medicine, Konkuk University, 120, Neungdong-ro, Gwangjin-gu, Seoul, 05029, Republic of Korea
| | - Hyeongkwon Oh
- Department of Mechanical Engineering, Korea Polytechnic University, 237 Sangidaehak-ro, Siheung-si, 15073, Republic of Korea
| | - Seokhwan Yun
- Department of Mechanical Engineering, Korea Polytechnic University, 237 Sangidaehak-ro, Siheung-si, 15073, Republic of Korea
| | - Chul Min Kim
- Department of Mechatronics, Gyeongsang National University, 33, Dongjin-ro, Jinju, 52725, Republic of Korea
| | - Yun-Mi Jeong
- Department of Mechanical Engineering, Korea Polytechnic University, 237 Sangidaehak-ro, Siheung-si, 15073, Republic of Korea
| | - Won-Soo Yun
- Department of Mechanical Engineering, Korea Polytechnic University, 237 Sangidaehak-ro, Siheung-si, 15073, Republic of Korea
- Research Institute, T&R Biofab. Co. Ltd, 242 Pangyo-ro, Seongnam, Gyeonggi, 13487, Republic of Korea
| | - Jin-Hyung Shim
- Department of Mechanical Engineering, Korea Polytechnic University, 237 Sangidaehak-ro, Siheung-si, 15073, Republic of Korea
- Research Institute, T&R Biofab. Co. Ltd, 242 Pangyo-ro, Seongnam, Gyeonggi, 13487, Republic of Korea
| | - Ilho Jang
- Research Institute, T&R Biofab. Co. Ltd, 242 Pangyo-ro, Seongnam, Gyeonggi, 13487, Republic of Korea
| | - C-Yoon Kim
- College of Veterinary Medicine, Konkuk University, 120, Neungdong-ro, Gwangjin-gu, Seoul, 05029, Republic of Korea
| | - Songwan Jin
- Department of Mechanical Engineering, Korea Polytechnic University, 237 Sangidaehak-ro, Siheung-si, 15073, Republic of Korea
- Research Institute, T&R Biofab. Co. Ltd, 242 Pangyo-ro, Seongnam, Gyeonggi, 13487, Republic of Korea
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Yun S, Choi D, Choi DJ, Jin S, Yun WS, Huh JB, Shim JH. Bone Fracture-Treatment Method: Fixing 3D-Printed Polycaprolactone Scaffolds with Hydrogel Type Bone-Derived Extracellular Matrix and β-Tricalcium Phosphate as an Osteogenic Promoter. Int J Mol Sci 2021; 22:ijms22169084. [PMID: 34445788 PMCID: PMC8396563 DOI: 10.3390/ijms22169084] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [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: 07/21/2021] [Revised: 08/20/2021] [Accepted: 08/21/2021] [Indexed: 11/16/2022] Open
Abstract
Bone formation and growth are crucial for treating bone fractures. Improving bone-reconstruction methods using autologous bone and synthetic implants can reduce the recovery time. Here, we investigated three treatments using two different materials, a bone-derived decellularized extracellular matrix (bdECM) and β-tricalcium phosphate (β-TCP), individually and in combination, as osteogenic promoter between bone and 3D-printed polycaprolactone scaffold (6-mm diameter) in rat calvarial defects (8-mm critical diameter). The materials were tested with a human pre-osteoblast cell line (MG63) to determine the effects of the osteogenic promoter on bone formation in vitro. A polycaprolactone (PCL) scaffold with a porous structure was placed at the center of the in vivo rat calvarial defects. The gap between the defective bone and PCL scaffold was filled with each material. Animals were sacrificed four weeks post-implantation, and skull samples were preserved for analysis. The preserved samples were scanned by micro-computed tomography and analyzed histologically to examine the clinical benefits of the materials. The bdECM–β-TCP mixture showed faster bone formation and a lower inflammatory response in the rats. Therefore, our results imply that a bdECM–β-TCP mixture is an ideal osteogenic promoter for treating fractures.
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Affiliation(s)
- Seokhwan Yun
- Department of Mechanical Engineering, Korea Polytechnic University, Siheung-si 15073, Korea; (S.Y.); (D.-J.C.); (S.J.)
| | - Dami Choi
- Research Institute, T&R Biofab Co., Ltd., Siheung-si 15073, Korea;
| | - Dong-Jin Choi
- Department of Mechanical Engineering, Korea Polytechnic University, Siheung-si 15073, Korea; (S.Y.); (D.-J.C.); (S.J.)
| | - Songwan Jin
- Department of Mechanical Engineering, Korea Polytechnic University, Siheung-si 15073, Korea; (S.Y.); (D.-J.C.); (S.J.)
- Research Institute, T&R Biofab Co., Ltd., Siheung-si 15073, Korea;
| | - Won-Soo Yun
- Department of Mechanical Engineering, Korea Polytechnic University, Siheung-si 15073, Korea; (S.Y.); (D.-J.C.); (S.J.)
- Research Institute, T&R Biofab Co., Ltd., Siheung-si 15073, Korea;
- Correspondence: (W.-S.Y.); (J.-B.H.); (J.-H.S.); Tel.: +82-31-8041-1819 (W.-S.Y.); +82-55-360-5146 (J.-B.H.); +82-31-8041-1819 (J.-H.S.)
| | - Jung-Bo Huh
- Department of Prosthodontics, Dental Research Institute, Dental and Life Sciences Institute, School of Dentistry, Pusan National University, Yangsan-si 50612, Korea
- Correspondence: (W.-S.Y.); (J.-B.H.); (J.-H.S.); Tel.: +82-31-8041-1819 (W.-S.Y.); +82-55-360-5146 (J.-B.H.); +82-31-8041-1819 (J.-H.S.)
| | - Jin-Hyung Shim
- Department of Mechanical Engineering, Korea Polytechnic University, Siheung-si 15073, Korea; (S.Y.); (D.-J.C.); (S.J.)
- Research Institute, T&R Biofab Co., Ltd., Siheung-si 15073, Korea;
- Correspondence: (W.-S.Y.); (J.-B.H.); (J.-H.S.); Tel.: +82-31-8041-1819 (W.-S.Y.); +82-55-360-5146 (J.-B.H.); +82-31-8041-1819 (J.-H.S.)
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Kim DH, Lee IH, Yun WS, Shim JH, Choi D, Hwang SH, Kim SW. Long-term efficacy and safety of 3D printed implant in patients with nasal septal deformities. Eur Arch Otorhinolaryngol 2021; 279:1943-1950. [PMID: 34291346 DOI: 10.1007/s00405-021-06996-y] [Citation(s) in RCA: 2] [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] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Accepted: 07/12/2021] [Indexed: 12/14/2022]
Abstract
PURPOSE To investigate the long-term safety and efficacy of a 3D-printed bioresorbable polycaprolactone (PCL) nasal implant for nasal septal deformity reconstruction. METHODS Fourteen patients who had undergone nasal septum reconstruction surgery using 3D-printed PCL nasal septal implants were enrolled. The primary outcome was the change in total Nasal Obstruction Symptom Evaluation (NOSE) scale scores between postoperative 3 months and current status (3.59 ± 0.51 years). The secondary outcomes were changes in the minimum cross-sectional area (MCA) and volume of both nasal cavities based on acoustic rhinometry, the cross-sectional area of the ostiomeatal unit, and the nasal septum angle of the paranasal sinus (PNS) in computed tomography (CT) images, and a visual analog scale (VAS) of the patients' subjective satisfaction. RESULTS The results showed no significant changes in the MCAs (Cohen's d:0.09; p = 0.711) or nasal volume (Cohen's d:0.26; p = 0.356), the area of the ostiomeatal unit (Cohen's d:0.49; p = 0.064), septum angles (Cohen's d:0.18; p = 0.831), the NOSE scale (Cohen's d:0.14; p = 0.621), or patients' subjective satisfaction (Cohen's d:0.52; p = 0.076) during the follow-up period. CONCLUSIONS This homogeneous composite microporous PCL nasal septal implant demonstrated long-term clinical efficacy and safety in human tissues that required maintenance of mechanical strength. Therefore, the indications for this implant could extend to various other craniofacial reconstructions in the future.
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Affiliation(s)
- Do Hyun Kim
- Department of Otolaryngology-Head and Neck Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Banpo-daero 222, Seocho-gu, Seoul, 137-701, Republic of Korea
| | - Il Hwan Lee
- Department of Otolaryngology-Head and Neck Surgery, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Incheon, Republic of Korea
| | - Won-Soo Yun
- Department of Mechanical Engineering, Korea Polytechnic University, Siheung-Si, Gyeonggi-Do, Korea.,Research Institute, T&R Biofab Co. Ltd, Siheung-Si, Gyeonggi-Do, Korea
| | - Jin-Hyung Shim
- Department of Mechanical Engineering, Korea Polytechnic University, Siheung-Si, Gyeonggi-Do, Korea.,Research Institute, T&R Biofab Co. Ltd, Siheung-Si, Gyeonggi-Do, Korea
| | - Dami Choi
- Research Institute, T&R Biofab Co. Ltd, Siheung-Si, Gyeonggi-Do, Korea
| | - Se Hwan Hwang
- Department of Otolaryngology-Head and Neck Surgery, Bucheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 327 Sosa-ro, Bucheon-si, Gyeonggi-Do, 14647, Korea.
| | - Sung Won Kim
- Department of Otolaryngology-Head and Neck Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Banpo-daero 222, Seocho-gu, Seoul, 137-701, Republic of Korea.
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Lee JS, Park TH, Ryu JY, Kim DK, Oh EJ, Kim HM, Shim JH, Yun WS, Huh JB, Moon SH, Kang SS, Chung HY. Osteogenesis of 3D-Printed PCL/TCP/bdECM Scaffold Using Adipose-Derived Stem Cells Aggregates; An Experimental Study in the Canine Mandible. Int J Mol Sci 2021; 22:ijms22115409. [PMID: 34063742 PMCID: PMC8196585 DOI: 10.3390/ijms22115409] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 05/18/2021] [Accepted: 05/19/2021] [Indexed: 12/20/2022] Open
Abstract
Three-dimensional (3D) printing is perceived as an innovative tool for change in tissue engineering and regenerative medicine based on research outcomes on the development of artificial organs and tissues. With advances in such technology, research is underway into 3D-printed artificial scaffolds for tissue recovery and regeneration. In this study, we fabricated artificial scaffolds by coating bone demineralized and decellularized extracellular matrix (bdECM) onto existing 3D-printed polycaprolactone/tricalcium phosphate (PCL/TCP) to enhance osteoconductivity and osteoinductivity. After injecting adipose-derived stem cells (ADSCs) in an aggregate form found to be effective in previous studies, we examined the effects of the scaffold on ossification during mandibular reconstruction in beagle dogs. Ten beagles were divided into two groups: group A (PCL/TCP/bdECM + ADSC injection; n = 5) and group B (PCL/TCP/bdECM; n = 5). The results were analyzed four and eight weeks after intervention. Computed tomography (CT) findings showed that group A had more diffuse osteoblast tissue than group B. Evidence of infection or immune rejection was not detected following histological examination. Goldner trichrome (G/T) staining revealed rich ossification in scaffold pores. ColI, Osteocalcin, and Runx2 gene expressions were determined using real-time polymerase chain reaction. Group A showed greater expression of these genes. Through Western blotting, group A showed a greater expression of genes that encode ColI, Osteocalcin, and Runx2 proteins. In conclusion, intervention group A, in which the beagles received the additional ADSC injection together with the 3D-printed PCL/TCP coated with bdECM, showed improved mandibular ossification in and around the pores of the scaffold.
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Affiliation(s)
- Joon Seok Lee
- Department of Plastic and Reconstructive Surgery, School of Medicine, Kyungpook National University, Daegu 41944, Korea; (J.S.L.); (T.H.P.); (J.Y.R.); (E.J.O.); (H.M.K.)
| | - Tae Hyun Park
- Department of Plastic and Reconstructive Surgery, School of Medicine, Kyungpook National University, Daegu 41944, Korea; (J.S.L.); (T.H.P.); (J.Y.R.); (E.J.O.); (H.M.K.)
| | - Jeong Yeop Ryu
- Department of Plastic and Reconstructive Surgery, School of Medicine, Kyungpook National University, Daegu 41944, Korea; (J.S.L.); (T.H.P.); (J.Y.R.); (E.J.O.); (H.M.K.)
| | - Dong Kyu Kim
- TINA Aesthetic Surgical Clinic, Daegu 41938, Korea;
| | - Eun Jung Oh
- Department of Plastic and Reconstructive Surgery, School of Medicine, Kyungpook National University, Daegu 41944, Korea; (J.S.L.); (T.H.P.); (J.Y.R.); (E.J.O.); (H.M.K.)
- Cell & Matrix Research Institute, School of Medicine, Kyungpook National University, Daegu 41944, Korea
| | - Hyun Mi Kim
- Department of Plastic and Reconstructive Surgery, School of Medicine, Kyungpook National University, Daegu 41944, Korea; (J.S.L.); (T.H.P.); (J.Y.R.); (E.J.O.); (H.M.K.)
- Cell & Matrix Research Institute, School of Medicine, Kyungpook National University, Daegu 41944, Korea
| | - Jin-Hyung Shim
- Department of Mechanical Engineering, Korea Polytechnic University, 237 Sangidaehak-Ro, Siheung-si 15073, Gyeonggi-do, Korea; (J.-H.S.); (W.-S.Y.)
- Research Institute, T&R Biofab Co., Ltd. 242 Pangyo-ro, Seongnam-si 13487, Gyeonggi-do, Korea;
| | - Won-Soo Yun
- Department of Mechanical Engineering, Korea Polytechnic University, 237 Sangidaehak-Ro, Siheung-si 15073, Gyeonggi-do, Korea; (J.-H.S.); (W.-S.Y.)
- Research Institute, T&R Biofab Co., Ltd. 242 Pangyo-ro, Seongnam-si 13487, Gyeonggi-do, Korea;
| | - Jung Bo Huh
- Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Science, School of Dentistry, Pusan National University, Yangsan-si 50612, Korea;
| | - Sung Hwan Moon
- Research Institute, T&R Biofab Co., Ltd. 242 Pangyo-ro, Seongnam-si 13487, Gyeonggi-do, Korea;
| | - Seong Soo Kang
- College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Korea;
| | - Ho Yun Chung
- Department of Plastic and Reconstructive Surgery, School of Medicine, Kyungpook National University, Daegu 41944, Korea; (J.S.L.); (T.H.P.); (J.Y.R.); (E.J.O.); (H.M.K.)
- Cell & Matrix Research Institute, School of Medicine, Kyungpook National University, Daegu 41944, Korea
- BK21 FOUR KNU Convergence Educational Program of Biomedical Science for Creative Future Talents, School of Medicine, Kyungpook National University, Daegu 41944, Korea
- Correspondence: or ; Tel.: +82-53-420-5692; Fax: +82-53-425-3879
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Kim H, Shim JH, Kim S, Park JH, Kim K, Min BI. Unusual Pressure-Induced Quantum Phase Transition from Superconducting to Charge-Density Wave State in Rare-Earth-Based Heusler LuPd_{2}In Compound. Phys Rev Lett 2020; 125:157001. [PMID: 33095605 DOI: 10.1103/physrevlett.125.157001] [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] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 03/10/2020] [Accepted: 09/10/2020] [Indexed: 06/11/2023]
Abstract
We investigate the pressure effects on the electronic structures and phonon properties of rare-earth-based cubic-Heusler compound LuPd_{2}In, on the basis of ab initio density functional theory. We find the occurrence of intriguing phase transition from the superconducting (SC) to charge-density wave (CDW) state under pressure (P), which is quite unusual in that the pressure is detrimental to the CDW state in usual systems. The SC transition temperature T_{C} of LuPd_{2}In increases first with increasing pressure, up to P_{C}≈28 GPa, above which a quantum phase transition into the CDW state takes place. This extraordinary transition originates from the occurrence of phonon softening instability at a special q=M in the Brillouin zone. We thus propose that LuPd_{2}In is a quite unique material, in which the CDW quantum critical point is realized under the SC dome by applying the pressure.
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Affiliation(s)
- Heejung Kim
- Department of Physics, POSTECH, Pohang 37673, Korea
- MPPHC-CPM, Max Planck POSTECH/Korea Research Initiative, Pohang 37673, Korea
| | - J H Shim
- Department of Physics, POSTECH, Pohang 37673, Korea
- Department of Chemistry, POSTECH, Pohang 37673, Korea
| | - Sooran Kim
- Department of Physics Education, Kyungpook National University, Daegu 41566, Korea
| | - Jae-Hoon Park
- Department of Physics, POSTECH, Pohang 37673, Korea
- MPPHC-CPM, Max Planck POSTECH/Korea Research Initiative, Pohang 37673, Korea
- Division of Advanced Materials Science, POSTECH, Pohang 37673, Korea
| | - Kyoo Kim
- Department of Physics, POSTECH, Pohang 37673, Korea
- MPPHC-CPM, Max Planck POSTECH/Korea Research Initiative, Pohang 37673, Korea
- Korea Atomic Energy Research Institute (KAERI), 111 Daedeok-daero, Daejeon 34057, Korea
| | - B I Min
- Department of Physics, POSTECH, Pohang 37673, Korea
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Kang D, Hong G, An S, Jang I, Yun WS, Shim JH, Jin S. Bioprinting of Multiscaled Hepatic Lobules within a Highly Vascularized Construct. Small 2020; 16:e1905505. [PMID: 32078240 DOI: 10.1002/smll.201905505] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 01/25/2020] [Indexed: 06/10/2023]
Abstract
Highly vascularized complex liver tissue is generally divided into lobes, lobules, hepatocytes, and sinusoids, which can be viewed under different types of lens from the micro- to macro-scale. To engineer multiscaled heterogeneous tissues, a sophisticated and rapid tissue engineering approach is required, such as advanced 3D bioprinting. In this study, a preset extrusion bioprinting technique, which can create heterogeneous, multicellular, and multimaterial structures simultaneously, is utilized for creating a hepatic lobule (≈1 mm) array. The fabricated hepatic lobules include hepatic cells, endothelial cells, and a lumen. The endothelial cells surround the hepatic cells, the exterior of the lobules, the lumen, and finally, become interconnected with each other. Compared to hepatic cell/endothelial cell mixtures, the fabricated hepatic lobule shows higher albumin secretion, urea production, and albumin, MRP2, and CD31 protein levels, as well as, cytochrome P450 enzyme activity. It is found that each cell type with spatial cell patterning in bioink accelerates cellular organization, which could preserve structural integrity and improve cellular functions. In conclusion, preset extruded hepatic lobules within a highly vascularized construct are successfully constructed, enabling both micro- and macro-scale tissue fabrication, which can support the creation of large 3D tissue constructs for multiscale tissue engineering.
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Affiliation(s)
- Donggu Kang
- Research Institute, T&R Biofab. Co. Ltd., 242 Pangyo-ro, Seongnam-si, 13487, Republic of Korea
| | - Gyusik Hong
- Department of Mechanical Engineering, Korea Polytechnic University, 237 Sangidaehak-ro, Siheung-si, 15073, Republic of Korea
| | - Seongmin An
- Department of Mechanical Engineering, Korea Polytechnic University, 237 Sangidaehak-ro, Siheung-si, 15073, Republic of Korea
| | - Ilho Jang
- Research Institute, T&R Biofab. Co. Ltd., 242 Pangyo-ro, Seongnam-si, 13487, Republic of Korea
| | - Won-Soo Yun
- Department of Mechanical Engineering, Korea Polytechnic University, 237 Sangidaehak-ro, Siheung-si, 15073, Republic of Korea
| | - Jin-Hyung Shim
- Department of Mechanical Engineering, Korea Polytechnic University, 237 Sangidaehak-ro, Siheung-si, 15073, Republic of Korea
| | - Songwan Jin
- Department of Mechanical Engineering, Korea Polytechnic University, 237 Sangidaehak-ro, Siheung-si, 15073, Republic of Korea
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Kim JH, Lee IG, Lee JS, Oh DY, Jun YJ, Rhie JW, Shim JH, Moon SH. Restoration of the inferomedial orbital strut using a standardized three-dimensional printing implant. J Anat 2019; 236:923-930. [PMID: 31852015 DOI: 10.1111/joa.13136] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/19/2019] [Indexed: 12/13/2022] Open
Abstract
The inferomedial orbital strut (IOS) is the thin bony junction of the orbital medial wall and floor. Its fracture is common and leads to serious complications, including enophthalmos, globe dystopia and diplopia. However, anatomical restoration of the IOS is challenging owing to reduced structural support; sound anatomical background and accurate implants are therefore essential. The aim of the present study was to incorporate data from cadaveric orbit anatomy into three-dimensional (3D) printing technology and to reconstruct the complex orbital fracture elaborately. After averaging the data from computed tomography (CT) images of 100 adult cadavers, the dimensions of the IOS were extracted, and a tangent sphere was created using a computer-aided design program. The curves were compared with the CT data of 10 adult patients from the simulation test. Based on these data, a standardized 3D implant, 1.15 mm thick, was designed using polycaprolactone. The implant was placed in five patients with complex orbital fractures. The radius of the sphere in contact with the orbit, measuring 33.54 mm, was confirmed to be appropriate. A comparison between the normal side volume (V0) and the postoperative volume (Vpost ) showed that they were statistically similar. Furthermore, a comparison between V0 and the preoperative volume (Vpre ), and Vpost compared with Vpre also showed a statistically significant difference (P < 0.05). On follow-up, the preoperative ocular symptoms were resolved. The orbital data obtained from 100 cadavers provided standardized orbital anatomy, and 3D printed implants were created. The implants were anatomically accurate with regard to the orbital cavity and adequately covered the simulation model. The implant also showed satisfactory results when applied clinically in actual patients.
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Affiliation(s)
- Jun Hyeok Kim
- Department of Plastic and Reconstructive Surgery, College of Medicine, Catholic University of Korea, Seoul, Korea
| | - In-Gyu Lee
- Department of Mechanical Engineering, Korea Polytechnic University, Siheung, Korea
| | - Jeong-Seok Lee
- Department of Mechanical Engineering, Korea Polytechnic University, Siheung, Korea
| | - Deuk Young Oh
- Department of Plastic and Reconstructive Surgery, College of Medicine, Catholic University of Korea, Seoul, Korea
| | - Young Joon Jun
- Department of Plastic and Reconstructive Surgery, College of Medicine, Catholic University of Korea, Seoul, Korea
| | - Jong Won Rhie
- Department of Plastic and Reconstructive Surgery, College of Medicine, Catholic University of Korea, Seoul, Korea
| | - Jin-Hyung Shim
- Department of Mechanical Engineering, Korea Polytechnic University, Siheung, Korea
| | - Suk-Ho Moon
- Department of Plastic and Reconstructive Surgery, College of Medicine, Catholic University of Korea, Seoul, Korea
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Jeon H, Yun S, Choi E, Kang D, Park KH, Kim D, Jin S, Shim JH, Yun WS, Park J. Proliferation and osteogenic differentiation of human mesenchymal stem cells in PCL/silanated silica composite scaffolds for bone tissue regeneration. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2019.04.050] [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: 10/26/2022]
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Won JY, Lee MH, Kim MJ, Min KH, Ahn G, Han JS, Jin S, Yun WS, Shim JH. A potential dermal substitute using decellularized dermis extracellular matrix derived bio-ink. Artif Cells Nanomed Biotechnol 2019; 47:644-649. [PMID: 30873886 DOI: 10.1080/21691401.2019.1575842] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Upon bioprinting, cells are mixed with a biomaterial to fabricate a living tissue, thus emphasizing the importance of biomaterials. The biomaterial used in this study was a bio-ink prepared using skin decellularized extracellular matrix (dECM). Skin dECM was extracted by treating the dermis with chemicals and enzymes; the basic structural and functional proteins of the ECM, including collagen, glycosaminoglycans (GAGs), bioreactive materials and growth factors, were preserved, whereas the resident cells that might cause immune rejection or inflammatory responses were removed. The bio-ink based on dECM powder, together with human dermal fibroblasts (HDFs), was loaded into the nozzle of the 3D bioprinter to create the 3D construct. This construct underwent gelation with changing temperature while its shape was maintained for 7 days. The cells showed over 90% viability and proliferation. By analysing the gene expression pattern in the cells of the construct, the skin regenerative mechanism of the bio-ink was verified. Microarray results confirmed that the gene expression related to skin morphology and development had been enhanced because the bioreactive molecules and growth factors, in addition to residual ECM in dECM, provided an optimal condition for the HDFs.
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Affiliation(s)
- Joo-Yun Won
- a Research Institute , T&R Biofab Co. Ltd. , Siheung-si , Republic of Korea
| | - Mi-Hee Lee
- a Research Institute , T&R Biofab Co. Ltd. , Siheung-si , Republic of Korea
| | - Mi-Jeong Kim
- a Research Institute , T&R Biofab Co. Ltd. , Siheung-si , Republic of Korea
| | - Kyung-Hyun Min
- a Research Institute , T&R Biofab Co. Ltd. , Siheung-si , Republic of Korea
| | - Geunseon Ahn
- a Research Institute , T&R Biofab Co. Ltd. , Siheung-si , Republic of Korea
| | - Ji-Seok Han
- b Department of Advanced Toxicology Research , Korea Institute of Toxicology (KIT) , Daejeon , Republic of Korea
| | - Songwan Jin
- c Department of Mechanical Engineering , Korea Polytechnic University , Siheung-si , Republic of Korea
| | - Won-Soo Yun
- c Department of Mechanical Engineering , Korea Polytechnic University , Siheung-si , Republic of Korea
| | - Jin-Hyung Shim
- c Department of Mechanical Engineering , Korea Polytechnic University , Siheung-si , Republic of Korea
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Kim DH, Yun WS, Shim JH, Park KH, Choi D, Park MI, Hwang SH, Kim SW. Clinical Application of 3-Dimensional Printing Technology for Patients With Nasal Septal Deformities: A Multicenter Study. JAMA Otolaryngol Head Neck Surg 2019; 144:1145-1152. [PMID: 30326042 DOI: 10.1001/jamaoto.2018.2054] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Importance Studies have shown the controllability and porosity of polycaprolactone as well as the use of 3-dimensional (3-D) printing for nasal reconstruction in animal models. The utility of polycaprolactone with 3-D technology in nasal cartilaginous framework reconstruction in humans remains unknown. Objective To investigate the safety and efficacy of 3-D printed, bioresorbable polycaprolactone nasal implants. Design, Setting, and Participants This multicenter clinical trial comprised 20 patients with caudal septal deviations who underwent septoplasty, which used a 3-D printed polycaprolactone mesh, at 2 centers in South Korea. Patients were included if they were aged 18 to 74 years and had nasal septal deviations, Nasal Obstruction Symptom Evaluation scores greater than 20, and persistent nasal obstructions. Twenty-two patients met the inclusion criteria, but 2 patients were excluded before the operation. The study was conducted from July 1, 2016, to June 30, 2017. Main Outcomes and Measures The change in total Nasal Obstruction Symptom Evaluation score between the preoperative examination and the week 12 postoperative examination was the primary outcome. Changes in bilateral nasal cavity minimum cross-sectional area and volume on acoustic rhinometry at weeks 4 and 12 after the operation as well as changes in the nasal cavity cross-sectional area at the osteomeatal unit and nasal septum angle in the paranasal sinus on computed tomography after week 12 were among the secondary outcomes. Results Of the 20 patients included in the study, 4 (20%) were female, 16 (80%) were male, with a mean (SD) age of 34.95 (11.96) years. The preoperative and week 12 postoperative results revealed significant changes in the minimal cross-sectional areas on acoustic rhinometry (0.41 [SD, 0.39] vs -0.11 [SD, 0.18]; difference, 0.42; 95% CI, 0.23-0.61), nasal septum angles on computed tomography (11.22 [SD, 6.57] vs 2.89 [SD, 3.12]; difference, 8.33; 95% CI, 5.08-11.58), and Nasal Obstruction Symptom Evaluation scores (73.50 [SD, 19.88] vs 3.75 [SD, 6.26]; difference, 69.75; 95% CI, 59.22-80.28). The surgeons' convenience level with the procedure was favorable (visual analog scale score [SD], 90.90 [9.45]), and so were the patients' symptom improvements and satisfaction after 12 weeks (visual analog scale score [SD], 88.30 [9.87]). Conclusions and Relevance The 3-D printed, homogeneous, composite, microporous polycaprolactone nasal implant demonstrated proper mechanical support and thinness with excellent biocompatibility and surgical manipulability. Polycaprolactone may be a clinically biocompatible material for use in various craniofacial reconstructions in the future.
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Affiliation(s)
- Do Hyun Kim
- Department of Otolaryngology-Head and Neck Surgery, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, South Korea
| | - Won-Soo Yun
- Department of Mechanical Engineering, Korea Polytechnic University, Siheung-Si, Gyeonggi-Do, South Korea.,Research Institute, T&R Biofab Co Ltd, Siheung-Si, Gyeonggi-Do, South Korea
| | - Jin-Hyung Shim
- Department of Mechanical Engineering, Korea Polytechnic University, Siheung-Si, Gyeonggi-Do, South Korea.,Research Institute, T&R Biofab Co Ltd, Siheung-Si, Gyeonggi-Do, South Korea
| | - Keun-Ho Park
- Department of Mechanical Engineering, Korea Polytechnic University, Siheung-Si, Gyeonggi-Do, South Korea
| | - Dami Choi
- Research Institute, T&R Biofab Co Ltd, Siheung-Si, Gyeonggi-Do, South Korea
| | - Moon Il Park
- Department of Otolaryngology-Head and Neck Surgery, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, South Korea
| | - Se Hwan Hwang
- Department of Otolaryngology-Head and Neck Surgery, Bucheon St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, South Korea
| | - Sung Won Kim
- Department of Otolaryngology-Head and Neck Surgery, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, South Korea
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Choi S, Oh YI, Park KH, Lee JS, Shim JH, Kang BJ. New clinical application of three-dimensional-printed polycaprolactone/β-tricalcium phosphate scaffold as an alternative to allograft bone for limb-sparing surgery in a dog with distal radial osteosarcoma. J Vet Med Sci 2019; 81:434-439. [PMID: 30662043 PMCID: PMC6451899 DOI: 10.1292/jvms.18-0158] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Limb-sparing surgery is one of the surgical options for dogs with distal radial osteosarcoma (OSA). This case report highlights the novel application of a three-dimensional (3D)-printed patient-specific polycaprolactone/β-tricalcium phosphate (PCL/β-TCP) scaffold in limb-sparing surgery in a dog with distal radial OSA. The outcomes evaluated included postoperative gait analysis, complications, local recurrence of tumor, metastasis, and survival time. Post-operative gait evaluation showed significant improvement in limb function, including increased weight distribution and decreased asymmetry. The implant remained well in place and increased bone opacity was observed between the host bone and the scaffold. There was no complication due to scaffold or surgery. Significant improvement in limb function and quality of life was noted postoperatively. Local recurrence and pulmonary metastasis were identified at 8 weeks postoperatively. The survival time from diagnosis of OSA to death was 190 days. The PCL/β-TCP scaffold may be an effective alternative to cortical allograft in limb-sparing surgery for bone tumors.
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Affiliation(s)
- Seongjae Choi
- Department of Veterinary Surgery, College of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Ye-In Oh
- Department of Veterinary Internal Medicine, College of Veterinary Medicine, Seoul National University, Seoul 08826, Republic of Korea
| | - Keun-Ho Park
- Department of Mechanical Engineering, Korea Polytechnic University, Siheung 15073, Republic of Korea
| | - Jeong-Seok Lee
- Department of Mechanical Engineering, Korea Polytechnic University, Siheung 15073, Republic of Korea
| | - Jin-Hyung Shim
- Department of Mechanical Engineering, Korea Polytechnic University, Siheung 15073, Republic of Korea
| | - Byung-Jae Kang
- Department of Veterinary Surgery, College of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University, Chuncheon 24341, Republic of Korea
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Kim SE, Shim KM, Jang K, Shim JH, Kang SS. Three-Dimensional Printing-based Reconstruction of a Maxillary Bone Defect in a Dog Following Tumor Removal. ACTA ACUST UNITED AC 2018; 32:63-70. [PMID: 29275300 DOI: 10.21873/invivo.11205] [Citation(s) in RCA: 15] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Revised: 10/19/2017] [Accepted: 10/20/2017] [Indexed: 11/10/2022]
Abstract
Three-dimensional (3D) printing has been applied extensively not only in human, but also veterinary medicine. However, the technique is still used in the clinical area for a surgical plan or education prior to surgery. Thus, we report a case of reconstruction after tumor removal surgery with the use of a 3D-printed scaffold. A 12-year-old female mixed dog had a left caudal maxillary mass. Based on computed tomography images, a defect was confirmed on the maxillary bone due to the oral mass, and a surgical plan was designed to remove the oral mass and graft the 3D printed scaffold. Customized polycaprolactone/ beta-tracalciumphosphate (PCL/β-TCP) scaffold was fabricated using the micro-extrusion-based 3D printer. In the operation, after the removal of the oral mass, the scaffold was grafted onto the defect site. At follow-up, 8 months after surgery, the result was successful without any special problems in the periodic CT scans and oral examinations. This case is believed to be the first case of reconstruction by using a 3D printed scaffold in the maxillary bone defect, and this 3D printing technique is thought to be very helpful for veterinary patients with bone defects and several other diseases.
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Affiliation(s)
- Se Eun Kim
- Biomaterial R&BD Center, Chonnam National University, Gwangju, Republic of Korea.,Department of Veterinary surgery, College of Veterinary Medicine and BK21 Plus Project Team, Chonnam National University, Gwangju, Republic of Korea
| | - Kyung Mi Shim
- Biomaterial R&BD Center, Chonnam National University, Gwangju, Republic of Korea.,Department of Veterinary surgery, College of Veterinary Medicine and BK21 Plus Project Team, Chonnam National University, Gwangju, Republic of Korea
| | - Kwangsik Jang
- Biomaterial R&BD Center, Chonnam National University, Gwangju, Republic of Korea.,Department of Veterinary surgery, College of Veterinary Medicine and BK21 Plus Project Team, Chonnam National University, Gwangju, Republic of Korea
| | - Jin-Hyung Shim
- Department of Mechanical Engineering, Korea Polytechnic University, Siheung, Republic of Korea
| | - Seong Soo Kang
- Biomaterial R&BD Center, Chonnam National University, Gwangju, Republic of Korea .,Department of Veterinary surgery, College of Veterinary Medicine and BK21 Plus Project Team, Chonnam National University, Gwangju, Republic of Korea
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Kim S, Yi S, Oh M, Jang BG, Nam W, Yoo YC, Lee M, Jeon H, Zoh I, Lee H, Zhang C, Kim KH, Seo J, Shim JH, Chae J, Kuk Y. Surface reconstruction and charge modulation in BaFe 2As 2 superconducting film. J Phys Condens Matter 2018; 30:315001. [PMID: 29916822 DOI: 10.1088/1361-648x/aacd85] [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] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Whether or not epitaxially grown superconducting films have the same bulk-like superconducting properties is an important concern. We report the structure and the electronic properties of epitaxially grown Ba(Fe1-x Co x )2As2 films using scanning tunneling microscopy and scanning tunneling spectroscopy (STS). This film showed a different surface structure, [Formula: see text]R45° reconstruction, from those of as-cleaved surfaces from bulk crystals. The electronic structure of the grown film is different from that in bulk, and it is notable that the film exhibits the same superconducting transport properties. We found that the superconducting gap at the surface is screened at the Ba layer surface in STS measurements, and the charge density wave was observed at the surface in sample in the superconducting state.
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Affiliation(s)
- S Kim
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
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Kang D, Ahn G, Kim D, Kang HW, Yun S, Yun WS, Shim JH, Jin S. Pre-set extrusion bioprinting for multiscale heterogeneous tissue structure fabrication. Biofabrication 2018; 10:035008. [DOI: 10.1088/1758-5090/aac70b] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Kim JY, Ahn G, Kim C, Lee JS, Lee IG, An SH, Yun WS, Kim SY, Shim JH. Macromol. Biosci. 6/2018. Macromol Biosci 2018. [DOI: 10.1002/mabi.201870014] [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)
- Jun-Young Kim
- Department of Orthopedic Surgery; Kyungpook National University Hospital; 130 Dongdeok-ro Jung-gu Daegu 41944 Republic of Korea
| | - Geunseon Ahn
- Research Institute; T&R Biofab Co., Ltd.; 237 Sangidaehak-Ro Siheung-si Gyeonggi-do 15073 Republic of Korea
| | - Changhwan Kim
- Research Institute; T&R Biofab Co., Ltd.; 237 Sangidaehak-Ro Siheung-si Gyeonggi-do 15073 Republic of Korea
| | - Jeong-Seok Lee
- Department of Mechanical Engineering; Korea Polytechnic University; 237 Sangidaehak-Ro Siheung-si Gyeonggi-do 15073 Republic of Korea
| | - In-Gyu Lee
- Department of Mechanical Engineering; Korea Polytechnic University; 237 Sangidaehak-Ro Siheung-si Gyeonggi-do 15073 Republic of Korea
| | - Sang-Hyun An
- Laboratory Animal Center; Daegu-Gyeongbuk Medical Innovation Foundation; 88 Dongae-ro Dong-gu Daegu 41061 Republic of Korea
| | - Won-Soo Yun
- Research Institute; T&R Biofab Co., Ltd.; 237 Sangidaehak-Ro Siheung-si Gyeonggi-do 15073 Republic of Korea
- Department of Mechanical Engineering; Korea Polytechnic University; 237 Sangidaehak-Ro Siheung-si Gyeonggi-do 15073 Republic of Korea
| | - Shin-Yoon Kim
- Department of Orthopedic Surgery; Kyungpook National University Hospital; 130 Dongdeok-ro Jung-gu Daegu 41944 Republic of Korea
| | - Jin-Hyung Shim
- Department of Mechanical Engineering; Korea Polytechnic University; 237 Sangidaehak-Ro Siheung-si Gyeonggi-do 15073 Republic of Korea
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Kim JY, Ahn G, Kim C, Lee JS, Lee IG, An SH, Yun WS, Kim SY, Shim JH. Synergistic Effects of Beta Tri-Calcium Phosphate and Porcine-Derived Decellularized Bone Extracellular Matrix in 3D-Printed Polycaprolactone Scaffold on Bone Regeneration. Macromol Biosci 2018; 18:e1800025. [DOI: 10.1002/mabi.201800025] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 03/08/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Jun-Young Kim
- Department of Orthopedic Surgery; Kyungpook National University Hospital; 130 Dongdeok-ro Jung-gu Daegu 41944 Republic of Korea
| | - Geunseon Ahn
- Research Institute; T&R Biofab Co., Ltd.; 237 Sangidaehak-Ro Siheung-si Gyeonggi-do 15073 Republic of Korea
| | - Changhwan Kim
- Research Institute; T&R Biofab Co., Ltd.; 237 Sangidaehak-Ro Siheung-si Gyeonggi-do 15073 Republic of Korea
| | - Jeong-Seok Lee
- Department of Mechanical Engineering; Korea Polytechnic University; 237 Sangidaehak-Ro Siheung-si Gyeonggi-do 15073 Republic of Korea
| | - In-Gyu Lee
- Department of Mechanical Engineering; Korea Polytechnic University; 237 Sangidaehak-Ro Siheung-si Gyeonggi-do 15073 Republic of Korea
| | - Sang-Hyun An
- Laboratory Animal Center; Daegu-Gyeongbuk Medical Innovation Foundation; 88 Dongae-ro Dong-gu Daegu 41061 Republic of Korea
| | - Won-Soo Yun
- Research Institute; T&R Biofab Co., Ltd.; 237 Sangidaehak-Ro Siheung-si Gyeonggi-do 15073 Republic of Korea
- Department of Mechanical Engineering; Korea Polytechnic University; 237 Sangidaehak-Ro Siheung-si Gyeonggi-do 15073 Republic of Korea
| | - Shin-Yoon Kim
- Department of Orthopedic Surgery; Kyungpook National University Hospital; 130 Dongdeok-ro Jung-gu Daegu 41944 Republic of Korea
| | - Jin-Hyung Shim
- Department of Mechanical Engineering; Korea Polytechnic University; 237 Sangidaehak-Ro Siheung-si Gyeonggi-do 15073 Republic of Korea
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Park SH, Choi YJ, Moon SW, Lee BH, Shim JH, Cho DW, Wang JH. Three-Dimensional Bio-Printed Scaffold Sleeves With Mesenchymal Stem Cells for Enhancement of Tendon-to-Bone Healing in Anterior Cruciate Ligament Reconstruction Using Soft-Tissue Tendon Graft. Arthroscopy 2018; 34:166-179. [PMID: 28688825 DOI: 10.1016/j.arthro.2017.04.016] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [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: 10/27/2016] [Revised: 04/04/2017] [Accepted: 04/12/2017] [Indexed: 02/02/2023]
Abstract
PURPOSE To investigate the efficacy of the insertion of 3-dimensional (3D) bio-printed scaffold sleeves seeded with mesenchymal stem cells (MSCs) to enhance osteointegration between the tendon and tunnel bone in anterior cruciate ligament (ACL) reconstruction in a rabbit model. METHODS Scaffold sleeves were fabricated by 3D bio-printing. Before ACL reconstruction, MSCs were seeded into the scaffold sleeves. ACL reconstruction with hamstring tendon was performed on both legs of 15 adult rabbits (aged 12 weeks). We implanted 15 bone tunnels with scaffold sleeves with MSCs and implanted another 15 bone tunnels with scaffold sleeves without MSCs before passing the graft. The specimens were harvested at 4, 8, and 12 weeks. H&E staining, immunohistochemical staining of type II collagen, and micro-computed tomography of the tunnel cross-sectional area were evaluated. Histologic assessment was conducted with a histologic scoring system. RESULTS In the histologic assessment, a smooth bone-to-tendon transition through broad fibrocartilage formation was identified in the treatment group, and the interface zone showed abundant type II collagen production on immunohistochemical staining. Bone-tendon healing histologic scores were significantly higher in the treatment group than in the control group at all time points. Micro-computed tomography at 12 weeks showed smaller tibial (control, 9.4 ± 0.9 mm2; treatment, 5.8 ± 2.9 mm2; P = .044) and femoral (control, 9.6 ± 2.9 mm2; treatment, 6.0 ± 1.0 mm2; P = .03) bone-tunnel areas in the treated group than in the control group. CONCLUSIONS The 3D bio-printed scaffold sleeve with MSCs exhibited excellent results in osteointegration enhancement between the tendon and tunnel bone in ACL reconstruction in a rabbit model. CLINICAL RELEVANCE If secure biological healing between the tendon graft and tunnel bone can be induced in the early postoperative period, earlier, more successful rehabilitation may be facilitated. Three-dimensional bio-printed scaffold sleeves with MSCs have the potential to accelerate bone-tendon healing in ACL reconstruction.
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Affiliation(s)
- Sin Hyung Park
- Department of Orthopaedic Surgery, Soonchunhyang University School of Medicine, Bucheon Hospital, Bucheon, Republic of Korea
| | - Yeong-Jin Choi
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea
| | - Sang Won Moon
- Department of Orthopaedic Surgery, Inje University School of Medicine, Haeundae Paik Hospital, Busan, Republic of Korea
| | - Byung Hoon Lee
- Department of Orthopaedic Surgery, Hallym University School of Medicine, Kangdong Sacred Heart Hospital, Seoul, Republic of Korea
| | - Jin-Hyung Shim
- Department of Mechanical Engineering, Korea Polytechnic University, Siheung, Republic of Korea
| | - Dong-Woo Cho
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea.
| | - Joon Ho Wang
- Department of Orthopaedic Surgery, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Republic of Korea.
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Bae JC, Lee JJ, Shim JH, Park KH, Lee JS, Bae EB, Choi JW, Huh JB. Development and Assessment of a 3D-Printed Scaffold with rhBMP-2 for an Implant Surgical Guide Stent and Bone Graft Material: A Pilot Animal Study. Materials (Basel) 2017; 10:E1434. [PMID: 29258172 PMCID: PMC5744369 DOI: 10.3390/ma10121434] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Revised: 12/12/2017] [Accepted: 12/14/2017] [Indexed: 01/10/2023]
Abstract
In this study, a new concept of a 3D-printed scaffold was introduced for the accurate placement of an implant and the application of a recombinant human bone morphogenetic protein-2 (rhBMP-2)-loaded bone graft. This preliminary study was conducted using two adult beagles to evaluate the 3D-printed polycaprolactone (PCL)/β-tricalcium phosphate (β-TCP)/bone decellularized extracellular matrix (bdECM) scaffold conjugated with rhBMP-2 for the simultaneous use as an implant surgical guide stent and bone graft material that promotes new bone growth. Teeth were extracted from the mandible of the beagle model and scanned by computed tomography (CT) to fabricate a customized scaffold that would fit the bone defect. After positioning the implant guide scaffold, the implant was placed and rhBMP-2 was injected into the scaffold of the experimental group. The two beagles were sacrificed after three months. The specimen block was obtained and scanned by micro-CT. Histological analysis showed that the control and experimental groups had similar new bone volume (NBV, %) but the experimental group with BMP exhibited a significantly higher bone-to-implant contact ratio (BIC, %). Within the limitations of this preliminary study, a 3D-printed scaffold conjugated with rhBMP-2 can be used simultaneously as an implant surgical guide and a bone graft in a large bone defect site. Further large-scale studies will be needed to confirm these results.
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Affiliation(s)
- Ji Cheol Bae
- Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, BK21 PLUS Project, School of Dentistry, Pusan National University, Yangsan 50612, Korea.
| | - Jin-Ju Lee
- Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, BK21 PLUS Project, School of Dentistry, Pusan National University, Yangsan 50612, Korea.
| | - Jin-Hyung Shim
- Department of Mechanical Engineering, Korea Polytechnic University, 237 Sangidaehak-Ro, Siheung 15073, Korea.
| | - Keun-Ho Park
- Department of Mechanical Engineering, Korea Polytechnic University, 237 Sangidaehak-Ro, Siheung 15073, Korea.
| | - Jeong-Seok Lee
- Department of Mechanical Engineering, Korea Polytechnic University, 237 Sangidaehak-Ro, Siheung 15073, Korea.
| | - Eun-Bin Bae
- Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, BK21 PLUS Project, School of Dentistry, Pusan National University, Yangsan 50612, Korea.
| | - Jae-Won Choi
- Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, BK21 PLUS Project, School of Dentistry, Pusan National University, Yangsan 50612, Korea.
| | - Jung-Bo Huh
- Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, BK21 PLUS Project, School of Dentistry, Pusan National University, Yangsan 50612, Korea.
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Shim JH, Jeong JH, Won JY, Bae JH, Ahn G, Jeon H, Yun WS, Bae EB, Choi JW, Lee SH, Jeong CM, Chung HY, Huh JB. Porosity effect of 3D-printed polycaprolactone membranes on calvarial defect model for guided bone regeneration. ACTA ACUST UNITED AC 2017; 13:015014. [PMID: 29155411 DOI: 10.1088/1748-605x/aa9bbc] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The appropriate porosity and pore size of barrier membranes were associated with the transportation of biomolecules required for new bone formation and angiogenesis. In this study, we fabricated three-dimensional (3D)-printed resorbable polycaprolactone (PCL) membranes with different porosities (30%, 50%, and 70%) to evaluate the effective pore size for guided bone regeneration (GBR) membranes. To analyze mechanical properties and cytocompatibility, PCL membranes prepared using extrusion-based 3D printing technology were compared in dry and wet conditions and tested in vitro. The proliferation rates and pattern of fibroblasts and preosteoblasts on PCL membranes with different porosities were determined using a cell counting kit-8 assay and scanning electron microscopy. PCL membrane porosity did not affect cell proliferation, but osteogenic differentiation and mechanical properties were increased with lower porosity (30%) on day 14 (p < 0.001). Similar results were found in an in vivo calvarial defect model; new bone formation was significantly higher in PCL membranes with lower porosity (p < 0.001). These results indicate that 3D-printed PCL with 30% porosity (130 μm pore size) is an excellent pore size for GBR membranes.
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Affiliation(s)
- Jin-Hyung Shim
- Department of Mechanical Engineering, Korea Polytechnic University, 237 Sangidaehak-Ro, Siheung-Si, Gyeonggi-Do, 15073, Republic of Korea
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Park TM, Kang D, Jang I, Yun WS, Shim JH, Jeong YH, Kwak JY, Yoon S, Jin S. Fabrication of In Vitro Cancer Microtissue Array on Fibroblast-Layered Nanofibrous Membrane by Inkjet Printing. Int J Mol Sci 2017; 18:ijms18112348. [PMID: 29112150 PMCID: PMC5713317 DOI: 10.3390/ijms18112348] [Citation(s) in RCA: 16] [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: 09/21/2017] [Revised: 10/29/2017] [Accepted: 11/02/2017] [Indexed: 01/21/2023] Open
Abstract
In general, a drug candidate is evaluated using 2D-cultured cancer cells followed by an animal model. Despite successful preclinical testing, however, most drugs that enter human clinical trials fail. The high failure rates are mainly caused by incompatibility between the responses of the current models and humans. Here, we fabricated a cancer microtissue array in a multi-well format that exhibits heterogeneous and batch-to-batch structure by continuous deposition of collagen-suspended Hela cells on a fibroblast-layered nanofibrous membrane via inkjet printing. Expression of both Matrix Metalloproteinase 2 (MMP2) and Matrix Metalloproteinase 9 (MMP9) was higher in cancer microtissues than in fibroblast-free microtissues. The fabricated microtissues were treated with an anticancer drug, and high drug resistance to doxorubicin occurred in cancer microtissues but not in fibroblast-free microtissues. These results introduce an inkjet printing fabrication method for cancer microtissue arrays, which can be used for various applications such as early drug screening and gradual 3D cancer studies.
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Affiliation(s)
- Tae-Min Park
- Research Institute, Femtobiomed Co., Ltd., 700, Pangyo-ro, Seongnam-si, Gyeonggi-do 13516, Korea.
| | - Donggu Kang
- Department of Mechanical System Engineering, Korea Polytechnic Univsersity, 237 Sangidaehak-ro, Siheung-si, Gyoenggi-do 15073, Korea.
| | - Ilho Jang
- Department of Advanced Convergence Technology, Korea Polytechnic Univsersity, 237 Sangidaehak-ro, Siheung-si, Gyoenggi-do 15073, Korea.
| | - Won-Soo Yun
- Research Institute, T&R Biofab Co., Ltd., 237 Sangidaehak-ro, Siheung-si, Gyoenggi-do 15073, Korea.
- Department of Mechanical Engineering, Korea Polytechnic Univsersity, 237 Sangidaehak-ro, Siheung-si, Gyoenggi-do 15073, Korea.
| | - Jin-Hyung Shim
- Department of Mechanical Engineering, Korea Polytechnic Univsersity, 237 Sangidaehak-ro, Siheung-si, Gyoenggi-do 15073, Korea.
| | - Young Hun Jeong
- School of Mechanical Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 702-701, Korea.
| | - Jong-Young Kwak
- Department of Pharmacology, Ajou University School of Medicine, Suwon 442-721, Korea.
| | - Sik Yoon
- Department of Anatomy, Pusan National University School of Medicine, Yangsan 626-770, Korea.
| | - Songwan Jin
- Department of Mechanical Engineering, Korea Polytechnic Univsersity, 237 Sangidaehak-ro, Siheung-si, Gyoenggi-do 15073, Korea.
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Ahn G, Min KH, Kim C, Lee JS, Kang D, Won JY, Cho DW, Kim JY, Jin S, Yun WS, Shim JH. Precise stacking of decellularized extracellular matrix based 3D cell-laden constructs by a 3D cell printing system equipped with heating modules. Sci Rep 2017; 7:8624. [PMID: 28819137 PMCID: PMC5561246 DOI: 10.1038/s41598-017-09201-5] [Citation(s) in RCA: 93] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Accepted: 07/24/2017] [Indexed: 01/16/2023] Open
Abstract
Three-dimensional (3D) cell printing systems allow the controlled and precise deposition of multiple cells in 3D constructs. Hydrogel materials have been used extensively as printable bioinks owing to their ability to safely encapsulate living cells. However, hydrogel-based bioinks have drawbacks for cell printing, e.g. inappropriate crosslinking and liquid-like rheological properties, which hinder precise 3D shaping. Therefore, in this study, we investigated the influence of various factors (e.g. bioink concentration, viscosity, and extent of crosslinking) on cell printing and established a new 3D cell printing system equipped with heating modules for the precise stacking of decellularized extracellular matrix (dECM)-based 3D cell-laden constructs. Because the pH-adjusted bioink isolated from native tissue is safely gelled at 37 °C, our heating system facilitated the precise stacking of dECM bioinks by enabling simultaneous gelation during printing. We observed greater printability compared with that of a non-heating system. These results were confirmed by mechanical testing and 3D construct stacking analyses. We also confirmed that our heating system did not elicit negative effects, such as cell death, in the printed cells. Conclusively, these results hold promise for the application of 3D bioprinting to tissue engineering and drug development.
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Affiliation(s)
- Geunseon Ahn
- Research Institute, T&R Biofab Co. Ltd., 237 Sangidaehak-Ro, Siheung, 15073, Republic of Korea
| | - Kyung-Hyun Min
- Department of Mechanical Engineering, Korea Polytechnic University, 237 Sangidaehak-Ro, Siheung, 15073, Republic of Korea
| | - Changhwan Kim
- Research Institute, T&R Biofab Co. Ltd., 237 Sangidaehak-Ro, Siheung, 15073, Republic of Korea
| | - Jeong-Seok Lee
- Department of Mechanical Engineering, Korea Polytechnic University, 237 Sangidaehak-Ro, Siheung, 15073, Republic of Korea
| | - Donggu Kang
- Department of Mechanical System Engineering, Korea Polytechnic University, 237 Sangidaehak-Ro, Siheung, 15073, Republic of Korea
| | - Joo-Yun Won
- Research Institute, T&R Biofab Co. Ltd., 237 Sangidaehak-Ro, Siheung, 15073, Republic of Korea
| | - Dong-Woo Cho
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea
| | - Jun-Young Kim
- Department of Orthopedic Surgery, Kyungpook National University Hospital, Daegu, 41944, Republic of Korea
| | - Songwan Jin
- Department of Mechanical Engineering, Korea Polytechnic University, 237 Sangidaehak-Ro, Siheung, 15073, Republic of Korea
| | - Won-Soo Yun
- Research Institute, T&R Biofab Co. Ltd., 237 Sangidaehak-Ro, Siheung, 15073, Republic of Korea.
- Department of Mechanical Engineering, Korea Polytechnic University, 237 Sangidaehak-Ro, Siheung, 15073, Republic of Korea.
| | - Jin-Hyung Shim
- Department of Mechanical Engineering, Korea Polytechnic University, 237 Sangidaehak-Ro, Siheung, 15073, Republic of Korea.
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Hwang KS, Choi JW, Kim JH, Chung HY, Jin S, Shim JH, Yun WS, Jeong CM, Huh JB. Comparative Efficacies of Collagen-Based 3D Printed PCL/PLGA/β-TCP Composite Block Bone Grafts and Biphasic Calcium Phosphate Bone Substitute for Bone Regeneration. Materials (Basel) 2017; 10:ma10040421. [PMID: 28772780 PMCID: PMC5506921 DOI: 10.3390/ma10040421] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 04/04/2017] [Accepted: 04/14/2017] [Indexed: 11/16/2022]
Abstract
The purpose of this study was to compare bone regeneration and space maintaining ability of three-dimensional (3D) printed bone grafts with conventional biphasic calcium phosphate (BCP). After mixing polycaprolactone (PCL), poly (lactic-co-glycolic acid) (PLGA), and β-tricalcium phosphate (β-TCP) in a 4:4:2 ratio, PCL/PLGA/β-TCP particulate bone grafts were fabricated using 3D printing technology. Fabricated particulate bone grafts were mixed with atelocollagen to produce collagen-based PCL/PLGA/β-TCP composite block bone grafts. After formation of calvarial defects 8 mm in diameter, PCL/PLGA/β-TCP composite block bone grafts and BCP were implanted into bone defects of 32 rats. Although PCL/PLGA/β-TCP composite block bone grafts were not superior in bone regeneration ability compared to BCP, the results showed relatively similar performance. Furthermore, PCL/PLGA/β-TCP composite block bone grafts showed better ability to maintain bone defects and to support barrier membranes than BCP. Therefore, within the limitations of this study, PCL/PLGA/β-TCP composite block bone grafts could be considered as an alternative to synthetic bone grafts available for clinical use.
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Affiliation(s)
- Kyoung-Sub Hwang
- Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, BK21 PLUS Project, School of Dentistry, Pusan National University, Yangsan 50612, Korea.
| | - Jae-Won Choi
- Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, BK21 PLUS Project, School of Dentistry, Pusan National University, Yangsan 50612, Korea.
| | - Jae-Hun Kim
- Department of Mechanical System Engineering, Graduate School of Knowledge-Based Technology and Energy, Korea Polytechnic University, 237 Sangidaehak-Ro, Siheung-Si, Gyeonggi-Do 15073, Korea.
| | - Ho Yun Chung
- Department of Plastic and Reconstructive Surgery, Kyungpook National University, School of Medicine, 130 Dongdeok-ro, Jung-gu, Daegu 41944, Korea.
| | - Songwan Jin
- Department of Mechanical Engineering, Korea Polytechnic University, 237 Sangidaehak-Ro, Siheung-Si, Gyeonggi-Do 15073, Korea.
| | - Jin-Hyung Shim
- Department of Mechanical Engineering, Korea Polytechnic University, 237 Sangidaehak-Ro, Siheung-Si, Gyeonggi-Do 15073, Korea.
| | - Won-Soo Yun
- Department of Mechanical Engineering, Korea Polytechnic University, 237 Sangidaehak-Ro, Siheung-Si, Gyeonggi-Do 15073, Korea.
| | - Chang-Mo Jeong
- Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, BK21 PLUS Project, School of Dentistry, Pusan National University, Yangsan 50612, Korea.
| | - Jung-Bo Huh
- Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, BK21 PLUS Project, School of Dentistry, Pusan National University, Yangsan 50612, Korea.
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Oikonomidou PR, Casu C, Yang Z, Crielaard B, Shim JH, Rivella S, Vogiatzi MG. Polycythemia is associated with bone loss and reduced osteoblast activity in mice. Osteoporos Int 2016; 27:1559-1568. [PMID: 26650379 PMCID: PMC5319412 DOI: 10.1007/s00198-015-3412-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Accepted: 11/05/2015] [Indexed: 01/19/2023]
Abstract
UNLABELLED Increased fragility has been described in humans with polycythemia vera (PV). Herein, we describe an osteoporotic phenotype associated with decreased osteoblast activity in a mouse model of PV and another mouse of polycythemia and elevated circulating erythropoietin (EPO). Our results are important for patients with PV or those treated with recombinant EPO (rEPO). INTRODUCTION PV and other myeloproliferative syndromes have been recently associated with an increased risk for fractures. However, the presence of osteoporosis in these patients has not been well documented. EPO, a hormone primarily known to stimulate erythropoiesis, has been shown recently to regulate bone homeostasis in mice. The aim of this study was to examine the bone phenotype of a mouse model of PV and compare it to that of animals with polycythemia caused by elevated circulating EPO. METHODS Bone mass and remodeling were evaluated by micro-computed tomography and histomorphometry. The JAK2(V617F) knock-in mouse, a model of human PV, manifests polycythemia and low circulating EPO levels. Results from this mouse were compared to wild type (wt) controls and the tg6 transgenic mouse that shows polycythemia caused by increased constitutive expression of EPO. RESULTS Compared to wt, both JAK2(V617F) and tg6 mice had a decrease in trabecular bone mass. Tg6 mice showed an additional modest decrease in cortical thickness and cortical bone volume per tissue volume (P < 0.01) suggesting a more severe bone phenotype than JAK2(V617F). Decreased osteoblast numbers and bone formation along with normal osteoclast numbers and activity were found in both mice. CONCLUSIONS This study indicates that PV is associated with low bone mass and decreased osteoblast activity in mice. Our results support future studies of osteoporosis in affected humans. Polycythemia caused by chronically elevated circulating EPO also results in bone loss, and implications on patients treated with rEPO should be evaluated.
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Affiliation(s)
- P R Oikonomidou
- Division of Pediatric Endocrinology, Weill Cornell Medical College, New York, NY, USA.
- Division of Hematology, Children's Hospital of Philadelphia, Abramson Research Center, 3615 Civic Center Blvd., Room 309 F, Philadelphia, PA, 19104, USA.
| | - C Casu
- Division of Pediatric Hematology/Oncology, Weill Cornell Medical College, New York, NY, USA
- Division of Hematology, Children's Hospital of Philadelphia, Abramson Research Center, 3615 Civic Center Blvd., Room 309 F, Philadelphia, PA, 19104, USA
| | - Z Yang
- Department of Medicine, Cancer Center, Weill Cornell Medical College, Belfer Research Building, 413 East 69th Street, 13th Floor, New York, NY,, 10021, USA
| | - B Crielaard
- Division of Pediatric Hematology/Oncology, Weill Cornell Medical College, New York, NY, USA
- Department of Polymer Chemistry and Bioengineering, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, Netherlands
| | - J H Shim
- Department of Pathology and Laboratory medicine, Weill Cornell Medical College, 1300 York Avenue, E-904, New York, NY,, 10065, USA
| | - S Rivella
- Division of Pediatric Hematology/Oncology, Weill Cornell Medical College, New York, NY, USA
- Division of Hematology, Children's Hospital of Philadelphia, Abramson Research Center, 3615 Civic Center Blvd., Room 316 B, Philadelphia, PA, 19104, USA
| | - M G Vogiatzi
- Division of Pediatric Endocrinology, Weill Cornell Medical College, New York, NY, USA
- Division of Endocrinology, Children's Hospital of Philadelphia, 3401 Civic Center Bvld., Philadelphia, PA, 19104, USA
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Kang CJ, Denlinger JD, Allen JW, Min CH, Reinert F, Kang BY, Cho BK, Kang JS, Shim JH, Min BI. Electronic Structure of YbB_{6}: Is it a Topological Insulator or Not? Phys Rev Lett 2016; 116:116401. [PMID: 27035312 DOI: 10.1103/physrevlett.116.116401] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2015] [Indexed: 06/05/2023]
Abstract
To finally resolve the controversial issue of whether or not the electronic structure of YbB_{6} is nontrivially topological, we have made a combined study using angle-resolved photoemission spectroscopy (ARPES) of the nonpolar (110) surface and density functional theory (DFT). The flat-band conditions of the (110) ARPES avoid the strong band bending effects of the polar (001) surface and definitively show that YbB_{6} has a topologically trivial B 2p-Yb 5d semiconductor band gap of ∼0.3 eV. Accurate determination of the low energy band topology in DFT requires the use of a modified Becke-Johnson exchange potential incorporating spin-orbit coupling and an on-site Yb 4f Coulomb interaction U as large as 7 eV. The DFT result, confirmed by a more precise GW band calculation, is similar to that of a small gap non-Kondo nontopological semiconductor. Additionally, the pressure-dependent electronic structure of YbB_{6} is investigated theoretically and found to transform into a p-d overlap semimetal with small Yb mixed valency.
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Affiliation(s)
- Chang-Jong Kang
- Department of Physics, PCTP, Pohang University of Science and Technology, (POSTECH) Pohang 37673, Korea
| | - J D Denlinger
- Advanced Light Source, Lawrence Berkeley Laboratory, Berkeley, California 94720, USA
| | - J W Allen
- Department of Physics, Randall Laboratory, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - Chul-Hee Min
- Universität Würzburg, Experimentelle Physik VII, 97074 Würzburg, Germany
| | - F Reinert
- Universität Würzburg, Experimentelle Physik VII, 97074 Würzburg, Germany
| | - B Y Kang
- School of Materials Science and Engineering, GIST, Gwangju 61005, Korea
| | - B K Cho
- School of Materials Science and Engineering, GIST, Gwangju 61005, Korea
| | - J-S Kang
- Department of Physics, The Catholic University of Korea, Bucheon 14662, Korea
| | - J H Shim
- Department of Physics, PCTP, Pohang University of Science and Technology, (POSTECH) Pohang 37673, Korea
- Department of Chemistry and Division of Advanced Nuclear Engineering, POSTECH, Pohang 37673, Korea
| | - B I Min
- Department of Physics, PCTP, Pohang University of Science and Technology, (POSTECH) Pohang 37673, Korea
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Park JY, Choi YJ, Shim JH, Park JH, Cho DW. Development of a 3D cell printed structure as an alternative to autologs cartilage for auricular reconstruction. J Biomed Mater Res B Appl Biomater 2016; 105:1016-1028. [PMID: 26922876 DOI: 10.1002/jbm.b.33639] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [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: 09/11/2015] [Revised: 01/04/2016] [Accepted: 02/03/2016] [Indexed: 12/12/2022]
Abstract
Surgical technique using autologs cartilage is considered as the best treatment for cartilage tissue reconstruction, although the burdens of donor site morbidity and surgical complications still remain. The purpose of this study is to apply three-dimensional (3D) cell printing to fabricate a tissue-engineered graft, and evaluate its effects on cartilage reconstruction. A multihead tissue/organ building system is used to print cell-printed scaffold (CPS), then assessed the effect of the CPS on cartilage regeneration in a rabbit ear. The cell viability and functionality of chondrocytes were significantly higher in CPS than in cell-seeded scaffold (CSS) and cell-seeded hybrid scaffold (CSHS) in vitro. CPS was then implanted into a rabbit ear that had an 8 mm-diameter cartilage defect; at 3 months after implantation the CPS had fostered complete cartilage regeneration whereas CSS and autologs cartilage (AC) fostered only incomplete healing. This result demonstrates that cell printing technology can provide an appropriate environment in which encapsulated chondrocytes can survive and differentiate into cartilage tissue in vivo. Moreover, the effects of CPS on cartilage regeneration were even better than those of AC. Therefore, we confirmed the feasibility of CPS as an alternative to AC for auricular reconstruction. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 1016-1028, 2017.
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Affiliation(s)
- Ju Young Park
- Division of Integrative Biosciences and Biotechnology, 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-Hyung Shim
- Department of Mechanical Engineering, Korea Polytechnic University, Siheung, Korea
| | - Jeong Hun Park
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Korea
| | - Dong-Woo Cho
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Korea
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Shim JH, Jang KM, Hahn SK, Park JY, Jung H, Oh K, Park KM, Yeom J, Park SH, Kim SW, Wang JH, Kim K, Cho DW. Three-dimensional bioprinting of multilayered constructs containing human mesenchymal stromal cells for osteochondral tissue regeneration in the rabbit knee joint. Biofabrication 2016; 8:014102. [DOI: 10.1088/1758-5090/8/1/014102] [Citation(s) in RCA: 167] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Lee JW, Choi YJ, Yong WJ, Pati F, Shim JH, Kang KS, Kang IH, Park J, Cho DW. Development of a 3D cell printed construct considering angiogenesis for liver tissue engineering. Biofabrication 2016; 8:015007. [DOI: 10.1088/1758-5090/8/1/015007] [Citation(s) in RCA: 152] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Jung HS, Choi YJ, Jeong J, Lee Y, Hwang B, Jang J, Shim JH, Kim YS, Choi HS, Oh SH, Lee CS, Cho DW, Hahn SK. Nanoscale graphene coating on commercially pure titanium for accelerated bone regeneration. RSC Adv 2016. [DOI: 10.1039/c6ra03905g] [Citation(s) in RCA: 22] [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: 11/21/2022] Open
Abstract
Nanoscale coating of reduced graphene oxide (RGO) on commercially pure titanium (CP-Ti) resulted in accelerated bone regeneration in the calvarial bone defect of rats.
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Kim GA, Shim JH, Kim MJ, Kim SY, Won HJ, Shin YM, Kim PN, Kim KH, Lee SG, Lee HC. Radiofrequency ablation as an alternative to hepatic resection for single small hepatocellular carcinomas. Br J Surg 2015; 103:126-35. [DOI: 10.1002/bjs.9960] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Revised: 08/06/2015] [Accepted: 09/04/2015] [Indexed: 12/21/2022]
Abstract
Abstract
Background
This study aimed to investigate whether radiofrequency ablation (RFA) is an alternative to surgical resection for hepatocellular carcinoma (HCC) within the context of current guidelines.
Methods
This retrospective study included patients with normal portal pressure and serum bilirubin level who initially underwent liver resection or RFA for a single HCC of maximum size 3 cm. Between-group differences in cumulative rates of survival and recurrence specific for HCC were analysed in the entire cohort and in a propensity score-matched cohort.
Results
A total of 604 patients were enrolled, 273 in the liver resection group and 331 in the RFA group. The 5- and 10-year HCC-specific survival rates for the resection and RFA groups were 87·6 versus 82·1 per cent and 59·0 versus 61·2 per cent respectively (P = 0·214), whereas overall 5- and 10-year recurrence-free survival rates for the corresponding groups were 60·6 versus 39·4 per cent and 37·5 versus 25·1 per cent respectively (P < 0·001). In the propensity score-matched cohort (152 pairs), there were no differences in HCC-specific survival (hazard ratio (HR) 1·03 for RFAversus resection; P = 0·899), whereas recurrence-free survival again differed between the treatment groups (HR 1·75; P < 0·001). RFA was independently associated with poorer outcomes in terms of treatment-site recurrence-free survival (adjusted HR 1·66; P = 0·026), but not non-treatment-site recurrence-free survival (adjusted HR 1·15; P = 0·354).
Conclusion
Although RFA carries a higher risk of treatment-site recurrence than hepatic resection, it provides comparable overall survival in patients with a single small HCC without portal hypertension or a raised bilirubin level.
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Affiliation(s)
- G-A Kim
- Department of Gastroenterology, Asan Liver Centre, Seoul, Korea
- Health Screening and Promotion Centre, Seoul, Korea
| | - J H Shim
- Department of Gastroenterology, Asan Liver Centre, Seoul, Korea
| | - M-J Kim
- Department of Clinical Epidemiology and Biostatistics, Asan Medical Centre, University of Ulsan College of Medicine, Seoul, Korea
| | - S Y Kim
- Department of Radiology, Asan Liver Centre, Seoul, Korea
| | - H J Won
- Department of Radiology, Asan Liver Centre, Seoul, Korea
| | - Y M Shin
- Department of Radiology, Asan Liver Centre, Seoul, Korea
| | - P N Kim
- Department of Radiology, Asan Liver Centre, Seoul, Korea
| | - K-H Kim
- Department of Surgery, Asan Liver Centre, Seoul, Korea
| | - S-G Lee
- Department of Surgery, Asan Liver Centre, Seoul, Korea
| | - H C Lee
- Department of Gastroenterology, Asan Liver Centre, Seoul, Korea
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Jeon JS, Kim BH, Lee SH, Kwon HJ, Bae HJ, Kim SK, Park JA, Shim JH, Abd El-Aty AM, Shin HC. Simultaneous determination of arbutin and its decomposed product hydroquinone in whitening creams using high-performance liquid chromatography with photodiode array detection: Effect of temperature and pH on decomposition. Int J Cosmet Sci 2015; 37:567-73. [PMID: 25857400 DOI: 10.1111/ics.12228] [Citation(s) in RCA: 21] [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: 03/02/2015] [Accepted: 03/31/2015] [Indexed: 11/26/2022]
Abstract
OBJECTIVE Arbutin is an effective agent for the treatment of melanin disorders. Arbutin may be converted to hydroquinone under conditions of high temperature, ultraviolet (UV) radiation and dilute acid. The aim of the current study was to develop an analytical method to determine the levels of arbutin and hydroquinone in whitening cosmetic products using high-performance liquid chromatography with photodiode array detection (HPLC-DAD). In addition, we investigated the effects of high temperature and pH on the decomposition of arbutin. METHODS Samples extracted using two-step sonications were separated on a C18 column using a gradient mobile phase consisting of water and methanol. A 60-mm (40 μL) DAD cell was used to enhance the sensitivity of hydroquinone determination. Thermal decomposition of arbutin was evaluated at temperatures ranging from 60 to 120°C for 1-36 h. RESULTS The method showed good linearity (R(2) ≥ 0.9997), precision (relative standard deviation, RSD < 5%) and acceptable extraction recovery (90-102.6%). The limits of quantitation for arbutin and hydroquinone were 0.0085 and 0.0119 μg mL(-1) , respectively. One sample of 21 cosmetic products tested contained arbutin at a concentration 1.61 g 100 g(-1) cream and 0.12 g 100 g(-1) cream of hydroquinone. Arbutin (327.18 ppm) decomposed after 6 h at 120°C and produced 10.73 ppm of hydroquinone. CONCLUSION The developed method is simple to detect both arbutin and hydroquinone simultaneously in cosmetic products, at an adequate level of sensitivity. Notably, temperature and pH did not influence the decomposition of arbutin to hydroquinone in a 2% arbutin cream.
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Affiliation(s)
- J S Jeon
- Department of Veterinary Pharmacology and Toxicology, College of Veterinary Medicine, Konkuk University, Nuengdong-ro, Gwangjin-gu, Seoul, 143-701, Korea.,Public Health Research Division, Gyeonggi Province Institute of Health and Environment, 95, Pajang cheon-ro, Jangan-gu, Suwonsi, Gyeonggi Province, 440-290, Korea
| | - B H Kim
- Public Health Research Division, Gyeonggi Province Institute of Health and Environment, 95, Pajang cheon-ro, Jangan-gu, Suwonsi, Gyeonggi Province, 440-290, Korea
| | - S H Lee
- Public Health Research Division, Gyeonggi Province Institute of Health and Environment, 95, Pajang cheon-ro, Jangan-gu, Suwonsi, Gyeonggi Province, 440-290, Korea
| | - H J Kwon
- Public Health Research Division, Gyeonggi Province Institute of Health and Environment, 95, Pajang cheon-ro, Jangan-gu, Suwonsi, Gyeonggi Province, 440-290, Korea
| | - H J Bae
- Public Health Research Division, Gyeonggi Province Institute of Health and Environment, 95, Pajang cheon-ro, Jangan-gu, Suwonsi, Gyeonggi Province, 440-290, Korea
| | - S K Kim
- Department of Veterinary Pharmacology and Toxicology, College of Veterinary Medicine, Konkuk University, Nuengdong-ro, Gwangjin-gu, Seoul, 143-701, Korea
| | - J A Park
- Department of Veterinary Pharmacology and Toxicology, College of Veterinary Medicine, Konkuk University, Nuengdong-ro, Gwangjin-gu, Seoul, 143-701, Korea
| | - J H Shim
- Biotechnology Research Institute, College of Agriculture and Life Sciences, Chonnam National University, 300 Yongbong-dong, Buk-gu, Gwangju, 500-757, Korea
| | - A M Abd El-Aty
- Department of Veterinary Pharmacology and Toxicology, College of Veterinary Medicine, Konkuk University, Nuengdong-ro, Gwangjin-gu, Seoul, 143-701, Korea.,Department of Pharmacology, Faculty of Veterinary Medicine, Cairo University, Giza, 12211, Egypt
| | - H C Shin
- Department of Veterinary Pharmacology and Toxicology, College of Veterinary Medicine, Konkuk University, Nuengdong-ro, Gwangjin-gu, Seoul, 143-701, Korea
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Song TH, Jang J, Choi YJ, Shim JH, Cho DW. 3D-Printed Drug/Cell Carrier Enabling Effective Release of Cyclosporin A for Xenogeneic Cell-Based Therapy. Cell Transplant 2015; 24:2513-25. [PMID: 25608278 DOI: 10.3727/096368915x686779] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Systemic administration of the immunosuppressive drug cyclosporin A (CsA) is frequently associated with a number of side effects; therefore, sometimes it cannot be applied in sufficient dosage after allogeneic or xenogeneic cell transplantation. Local delivery is a possible solution to this problem. We used 3D printing to develop a CsA-loaded 3D drug carrier for the purpose of local and sustained delivery of CsA. The carrier is a hybrid of CsA-poly(lactic-co-glycolic acid) (PLGA) microsphere-loaded hydrogel and a polymeric framework so that external force can be endured under physiological conditions. The expression of cytokines, which are secreted by spleen cells activated by Con A, and which are related to immune rejection, was significantly decreased in vitro by the released CsA from the drug carrier. Drug carriers seeded with xenogeneic cells (human lung fibroblast) were subcutaneously implanted into the BALB/c mouse. As a result, T-cell-mediated rejection was also significantly suppressed for 4 weeks. These results show that the developed 3D drug carrier can be used as an effective xenogeneic cell delivery system with controllable immunosuppressive drugs for cell-based therapy.
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Affiliation(s)
- Tae-Ha Song
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Hyoja-dong, Nam-gu, Pohang, Kyungbuk, Korea
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Das S, Pati F, Choi YJ, Rijal G, Shim JH, Kim SW, Ray AR, Cho DW, Ghosh S. Bioprintable, cell-laden silk fibroin-gelatin hydrogel supporting multilineage differentiation of stem cells for fabrication of three-dimensional tissue constructs. Acta Biomater 2015; 11:233-46. [PMID: 25242654 DOI: 10.1016/j.actbio.2014.09.023] [Citation(s) in RCA: 341] [Impact Index Per Article: 37.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Revised: 09/12/2014] [Accepted: 09/12/2014] [Indexed: 02/08/2023]
Abstract
Bioprinting has exciting prospects for printing three-dimensional (3-D) tissue constructs by delivering living cells with appropriate matrix materials. However, progress in this field is currently extremely slow due to limited choices of bioink for cell encapsulation and cytocompatible gelation mechanisms. Here we report the development of clinically relevant sized tissue analogs by 3-D bioprinting, delivering human nasal inferior turbinate tissue-derived mesenchymal progenitor cells encapsulated in silk fibroin-gelatin (SF-G) bioink. Gelation in this bioink was induced via in situ cytocompatible gelation mechanisms, namely enzymatic crosslinking by mushroom tyrosinase and physical crosslinking via sonication. Mechanistically, tyrosinases oxidize the accessible tyrosine residues of silk and/or gelatin into reactive o-quinone moieties that can either condense with each other or undergo nonenzymatic reactions with available amines of both silk and gelatin. Sonication alters the hydrophobic interaction and accelerates self-assembly of silk fibroin macromolecules to form β-sheet crystals, which physically crosslink the hydrogel. However, sonication has no effect on the conformation of gelatin. The effect of optimized rheology, secondary conformations of silk-gelatin bioink, temporally controllable gelation strategies and printing parameters were assessed to achieve maximum cell viability and multilineage differentiation of the encapsulated human nasal inferior turbinate tissue-derived mesenchymal progenitor cells. This strategy offers a unique path forward in the direction of direct printing of spatially customized anatomical architecture in a patient-specific manner.
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Park JY, Shim JH, Choi SA, Jang J, Kim M, Lee SH, Cho DW. 3D printing technology to control BMP-2 and VEGF delivery spatially and temporally to promote large-volume bone regeneration. J Mater Chem B 2015; 3:5415-5425. [DOI: 10.1039/c5tb00637f] [Citation(s) in RCA: 123] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
When large engineered tissue structures are used to achieve tissue regeneration, formation of vasculature is an essential process.
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Affiliation(s)
- Ju Young Park
- Division of Integrative Biosciences and Biotechnology
- POSTECH
- Pohang
- Korea
| | - Jin-Hyung Shim
- Department of Mechanical Engineering
- Korea Polytechnic University
- Siheung
- Korea
| | - Song-Ah Choi
- Division of Integrative Biosciences and Biotechnology
- POSTECH
- Pohang
- Korea
| | - Jinah Jang
- Division of Integrative Biosciences and Biotechnology
- POSTECH
- Pohang
- Korea
| | - Myungshin Kim
- Department of Laboratory Medicine
- Seoul St. Mary's Hospital
- The Catholic University of Korea
- Seoul
- Korea
| | - Sang Hwa Lee
- Department of Oral and Maxillofacial Surgery
- Yeouido St. Mary's Hospital
- 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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Shim JH, Yoon MC, Jeong CM, Jang J, Jeong SI, Cho DW, Huh JB. Efficacy of rhBMP-2 loaded PCL/PLGA/
β
-TCP guided bone regeneration membrane fabricated by 3D printing technology for reconstruction of calvaria defects in rabbit. Biomed Mater 2014; 9:065006. [DOI: 10.1088/1748-6041/9/6/065006] [Citation(s) in RCA: 84] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Pati F, Jang J, Ha DH, Won Kim S, Rhie JW, Shim JH, Kim DH, Cho DW. Printing three-dimensional tissue analogues with decellularized extracellular matrix bioink. Nat Commun 2014; 5:3935. [PMID: 24887553 PMCID: PMC4059935 DOI: 10.1038/ncomms4935] [Citation(s) in RCA: 1094] [Impact Index Per Article: 109.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Accepted: 04/22/2014] [Indexed: 12/30/2022] Open
Abstract
The ability to print and pattern all the components that make up a tissue (cells and matrix materials) in three dimensions to generate structures similar to tissues is an exciting prospect of bioprinting. However, the majority of the matrix materials used so far for bioprinting cannot represent the complexity of natural extracellular matrix (ECM) and thus are unable to reconstitute the intrinsic cellular morphologies and functions. Here, we develop a method for the bioprinting of cell-laden constructs with novel decellularized extracellular matrix (dECM) bioink capable of providing an optimized microenvironment conducive to the growth of three-dimensional structured tissue. We show the versatility and flexibility of the developed bioprinting process using tissue-specific dECM bioinks, including adipose, cartilage and heart tissues, capable of providing crucial cues for cells engraftment, survival and long-term function. We achieve high cell viability and functionality of the printed dECM structures using our bioprinting method.
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Affiliation(s)
- Falguni Pati
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam ro, Nam-gu, Pohang, Kyungbuk 790-784, South Korea
- These authors contributed equally to this work
| | - Jinah Jang
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), 77 Cheongam ro, Nam-gu, Pohang, Kyungbuk 790-784, South Korea
- Department of Bioengineering, University of Washington, Seattle, Waltham 98195, USA
- These authors contributed equally to this work
| | - Dong-Heon Ha
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam ro, Nam-gu, Pohang, Kyungbuk 790-784, South Korea
| | - Sung Won Kim
- Department of Otolaryngology-Head and Neck Surgery, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul 137-710, South Korea
- Department of Biomedical Science, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul 137-701, South Korea
| | - Jong-Won Rhie
- Department of Plastic Surgery, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul 137-701, South Korea
| | - Jin-Hyung Shim
- Department of Mechanical Engineering, Korea Polytechnic University, 2121 Jeongwang-dong, Siheungsi, Gyeonggi-do 429-793, South Korea
| | - Deok-Ho Kim
- Department of Bioengineering, University of Washington, Seattle, Waltham 98195, USA
- Center for Cardiovascular Biology, University of Washington, Seattle, Waltham 98109, USA
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA 98109, USA
| | - Dong-Woo Cho
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam ro, Nam-gu, Pohang, Kyungbuk 790-784, South Korea
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Park JY, Choi JC, Shim JH, Lee JS, Park H, Kim SW, Doh J, Cho DW. A comparative study on collagen type I and hyaluronic acid dependent cell behavior for osteochondral tissue bioprinting. Biofabrication 2014; 6:035004. [PMID: 24758832 DOI: 10.1088/1758-5082/6/3/035004] [Citation(s) in RCA: 122] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Bioprinting is a promising technique for engineering composite tissues, such as osteochondral tissues. In this study, as a first step toward bioprinting-based osteochondral tissue regeneration, we systematically examined the behavior of chondrocytes and osteoblasts to hyaluronic acid (HA) and type I collagen (Col-1) hydrogels. First, we demonstrated that cells on hydrogels that were comprised of major native tissue extracellular matrix (ECM) components (i.e. chondrocytes on HA hydrogels and osteoblasts on Col-1 hydrogels) exhibited better proliferation and cell function than cells on non-native ECM hydrogels (i.e., chondrocytes on Col-1 hydrogels and osteoblasts on HA hydrogels). In addition, cells located near their native ECM hydrogels migrated towards them. Finally, we bioprinted three-dimensional (3D) osteochondral tissue-mimetic structures composed of two compartments, osteoblast-encapsulated Col-1 hydrogels and chondrocyte-encapsulated HA hydrogels, and found viability and functions of each cell type were well maintained within the 3D structures up to 14 days in vitro. These results suggest that with proper choice of hydrogel materials, bioprinting-based approaches can be successfully applied for osteochondral tissue regeneration.
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Affiliation(s)
- Ju Young Park
- Division of Integrative Biosciences and Biotechnology, POSTECH, Pohang, Korea
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Shim JH, Kim SE, Park JY, Kundu J, Kim SW, Kang SS, Cho DW. Three-dimensional printing of rhBMP-2-loaded scaffolds with long-term delivery for enhanced bone regeneration in a rabbit diaphyseal defect. Tissue Eng Part A 2014; 20:1980-92. [PMID: 24517081 DOI: 10.1089/ten.tea.2013.0513] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
In this study, recombinant human bone morphogenetic protein-2 (rhBMP-2) delivery system with slow mode was successfully developed in three-dimensional (3D) printing-based polycaprolactone (PCL)/poly(lactic-co-glycolic acid) (PLGA) scaffolds for bone formation of critical-sized rabbit segmental diaphyseal defect. To control the delivery of the rhBMP-2, collagen (for long-term delivery up to 28 days) and gelatin (for shor-term delivery within a week) solutions encapsulating rhBMP-2 were dispensed into a hollow cylinderical type of PCL/PLGA scaffold. An effective dose of 5μg/mL was determined by measuring the alkaline phosphatase and osteocalcin gene expression levels of human nasal inferior turbinate-derived mesenchymal stromal cells (hTMSCs) seeded on the PCL/PLGA/collagen scaffold in vitro. However, it was found that a burst release of rhBMP-2 from the PCL/PLGA/gelatin scaffold did not induce the osteogenic differentiation of hTMSCs in vitro at an equivalent dose. In the in vivo animal experiements, microcomputed tomography and histological analyses confirmed that PCL/PLGA/collagen/rhBMP-2 scaffolds (long-term delivery mode) showed the best bone healing quality at both weeks 4 and 8 after implantation without inflammatory response. On the other hand, a large number of macrophages indicating severe inflammation provoked by burst release of rhBMP-2 were observed in the vicinity of PCL/PLGA/gelatin/rhBMP-2 (short-term delivery mode) at week 4.
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Affiliation(s)
- Jin-Hyung Shim
- 1 Department of Mechanical Engineering, Korea Polytechnic University , Siheung, South Korea
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Kim TH, Yun YP, Park YE, Lee SH, Yong W, Kundu J, Jung JW, Shim JH, Cho DW, Kim SE, Song HR. In vitro and in vivo evaluation of bone formation using solid freeform fabrication-based bone morphogenic protein-2 releasing PCL/PLGA scaffolds. Biomed Mater 2014; 9:025008. [PMID: 24518200 DOI: 10.1088/1748-6041/9/2/025008] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The aim of this study was to develop novel polycaprolactone/poly(lactic-co-glycolic acid) (PCL/PLGA) scaffolds with a heparin-dopamine (Hep-DOPA) conjugate for controlled release of bone morphogenic protein-2 (BMP-2) to enhance osteoblast activity in vitro and also bone formation in vivo. PCL/PLGA scaffolds were prepared by a solid freeform fabrication method. The PCL/PLGA scaffolds were functionalized with Hep-DOPA and then BMP-2 was sequentially coated onto the Hep-DOPA/PCL/PLGA scaffolds. The characterization and surface elemental composition of all scaffolds were evaluated by scanning electron microscope and x-ray photoelectron spectroscopy. The osteoblast activities on all scaffolds were assessed by cell proliferation, alkaline phosphatase (ALP) activity and calcium deposition in vitro. To demonstrate bone formation in vivo, plain radiograph, micro-computed tomography (micro-CT) evaluation and histological studies were performed after the implantation of all scaffolds on a rat femur defect. Hep-DOPA/PCL/PLGA had more controlled release of BMP-2, which was quantified by enzyme-linked immunosorbent assay, compared with Hep/PCL/PLGA. The in vitro results showed that osteoblast-like cells (MG-63 cells) grown on BMP-2/Hep-DOPA/PCL/PLGA had significantly enhanced ALP activity and calcium deposition compared with those on BMP-2/Hep/PCL/PLGA and PCL/PLGA. In addition, the plain radiograph, micro-CT evaluation and histological studies demonstrated that the implanted BMP-2/Hep-DOPA/PCL/PLGA on rat femur had more bone formation than BMP-2/Hep/PCL/PLGA and PCL/PLGA in vivo.
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Affiliation(s)
- Tae-Hoon Kim
- Department of Orthopedic Surgery, Konkuk University School of Medicine, 120-1 Neungdong-ro, Hwayang-dong, Gwangjin-gu, Seoul 143-729, Korea
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Lee JS, Hong JM, Jung JW, Shim JH, Oh JH, Cho DW. 3D printing of composite tissue with complex shape applied to ear regeneration. Biofabrication 2014; 6:024103. [DOI: 10.1088/1758-5082/6/2/024103] [Citation(s) in RCA: 266] [Impact Index Per Article: 26.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Zhao LB, Shi HB, Park S, Lee DG, Shim JH, Lee DH, Suh DC. Acute bleeding in the head and neck: angiographic findings and endovascular management. AJNR Am J Neuroradiol 2013; 35:360-6. [PMID: 24136646 DOI: 10.3174/ajnr.a3761] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
BACKGROUND AND PURPOSE Life-threatening bleeding in the head and neck requires urgent management. This study evaluated the angiographic findings related to head and neck bleeding and presents endovascular management techniques. MATERIAL AND METHODS Sixty-one consecutive patients who presented with acute bleeding in the head and neck areas and subsequently underwent endovascular therapy between January 2002 and October 2012 were included in our study. We evaluated the angiographic findings, techniques, and results of endovascular management. RESULTS Contrast leakage (n = 10), pseudoaneurysm (n = 20), or both (n = 10) were the most common life-threatening angiographic findings (66%) and were the foci of immediate embolization or endoluminal vessel reconstruction. Seventeen patients (28%) had hypervascular staining of the tumor or mucosa, and 4 patients (6%) did not have any abnormal findings. The acute bleeding was successfully controlled by endovascular management according to the bleeding foci. Carotid arterial lesions, so-called "carotid blowout," required reconstructive or deconstructive therapy. Bleeding of the external carotid artery required specific branch embolization by a combination of various embolic materials. No procedure-related complications occurred except in 1 patient who experienced acute infarction caused by thromboemboli from the covered stent. Seventeen patients (28%) were retreated due to rebleeding after the mean 20-month follow-up. CONCLUSIONS Contrast leakage or a pseudoaneurysm or both seen on angiography are active bleeding foci and targets for therapy in patients with acute bleeding in the head and neck area. Despite different bleeding-control strategies according to vessel involvement, endovascular treatment is safe and effective for controlling hemorrhage.
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Affiliation(s)
- L-B Zhao
- From the Departments of Radiology and Research Institute of Radiology (L.-B.Z., H.B.S., S.P., D.-g.L., J.H.S., D.H.L., D.C.S.), University of Ulsan, College of Medicine, Asan Medical Center, Seoul, Korea
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Kwak JH, Zhao L, Kim JK, Park S, Lee DG, Shim JH, Lee DH, Kim JS, Suh DC. The outcome and efficacy of recanalization in patients with acute internal carotid artery occlusion. AJNR Am J Neuroradiol 2013; 35:747-53. [PMID: 24091441 DOI: 10.3174/ajnr.a3747] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
BACKGROUND AND PURPOSE Acute occlusion of the ICA is often associated with poor outcomes and severe neurologic deficits. This study was conducted to evaluate outcome of the occluded ICA and efficacy of recanalization under protective flow arrest. MATERIALS AND METHODS Fifty consecutive patients who underwent endovascular treatment for acute ICA occlusion were identified from the prospectively collected data base. We assessed NIHSSo, occlusion type (cardioembolism vs atherosclerosis), occlusion level (supraclinoid-terminal, petrocavernous, or bulb-cervical), recanalization degree (TICI), and efficacy of recanalization (protective flow arrest vs nonprotection) leading to better outcome. RESULTS Successful recanalization (TICI ≥ 2) was obtained in 90% of patients and good recovery (mRS ≤ 2) in 60% of patients. Good outcome was related to National Institutes of Health Stroke Scale score on admission (P < .001), TICI (P < .007), occlusion type (P = .022), and occlusion level (P = .038). Poor initial patient status, less recanalization, cardioembolism, and supraclinoid-terminal occlusion were associated with poor prognosis. Application of protective flow arrest led to better outcome in the distal ICA segment than in the bulb-cervical segment. CONCLUSIONS In addition to the initial patient status and successful recanalization, the occlusion level or type of the occluded ICA could affect clinical outcome. In this study, treatment benefits of protective flow arrest were accentuated in patients with ICA occlusion above the bulb-cervical segment.
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Affiliation(s)
- J H Kwak
- From the Department of Radiology and Research Institute of Radiology (J.H.K., L.Z., S.P., D.-g.L., J.H.S., D.H.L., D.C.S.)
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Abstract
We retrospectively studied the radiological and clinical results of a simple hemiresection arthroplasty, a modification of previous oblique distal ulnar resections, in 62 patients with rheumatoid arthritis (68 wrists) over a mean follow-up of 103 (range 60-173) months. Fourteen wrists (20%) became fused at the radiocarpal joint and 28 wrists fused (41%) at the midcarpal joints during follow-up. Severe ulnar translocation of the carpus was observed in two wrists (3%), radio-ulnar convergence in five wrists (7%), as well as a significant decrease of carpal height ratio, without any radiological findings of stylocarpal impingement. Improvements in forearm pronation and supination, and reduction in pain were maintained at the last follow-up. Grip strength was not significantly improved. The Jebsen-Taylor hand function test showed improvements in writing, card turning, and simulated feeding. Fifty-two patients (58 wrists, 85%) were satisfied with the results at the last follow-up. Simple hemiresection arthroplasty showed good long-term results with few complications.
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Affiliation(s)
- C H Lee
- Department of Orthopaedic Surgery, Hanil General Hospital, Seoul, Korea
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47
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Lee NJ, Oh JH, Ban JO, Shim JH, Lee HP, Jung JK, Ahn BW, Yoon DY, Han SB, Ham YW, Hong JT. 4-O-methylhonokiol, a PPARγ agonist, inhibits prostate tumour growth: p21-mediated suppression of NF-κB activity. Br J Pharmacol 2013; 168:1133-45. [PMID: 23043610 DOI: 10.1111/j.1476-5381.2012.02235.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2012] [Revised: 08/22/2012] [Accepted: 09/05/2012] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND AND PURPOSE The effects of 4-O-methylhonokiol (MH), a constituent of Magnolia officinalis, were investigated on human prostate cancer cells and its mechanism of action elucidated. EXPERIMENTAL APPROACH The anti-cancer effects of MH were examined in prostate cancer and normal cells. The effects were validated in vivo using a mouse xenograft model. KEY RESULTS MH increased the expression of PPARγ in prostate PC-3 and LNCap cells. The pull-down assay and molecular docking study indicated that MH directly binds to PPARγ. MH also increased transcriptional activity of PPARγ but decreased NF-κB activity. MH inhibited the growth of human prostate cancer cells, an effect attenuated by the PPARγ antagonist GW9662. MH induced apoptotic cell death and this was related to G(0) -G(1) phase cell cycle arrest. MH increased the expression of the cell cycle regulator p21, and apoptotic proteins, whereas it decreased phosphorylation of Rb and anti-apoptotic proteins. Transfection of PC3 cells with p21 siRNA or a p21 mutant plasmid on the cyclin D1/ cycline-dependent kinase 4 binding site abolished the effects of MH on cell growth, cell viability and related protein expression. In the animal studies, MH inhibited tumour growth, NF-κB activity and expression of anti-apoptotic proteins, whereas it increased the transcriptional activity and expression of PPARγ, and the expression of apoptotic proteins and p21 in tumour tissues. CONCLUSIONS AND IMPLICATION MH inhibits growth of human prostate cancer cells through activation of PPARγ, suppression of NF-κB and arrest of the cell cycle. Thus, MH might be a useful tool for treatment of prostate cancer.
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Affiliation(s)
- N J Lee
- College of Pharmacy, Chungbuk National University, Chungbuk, South Korea
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Park S, Lee DG, Shim JH, Lee DH, Suh DC. Recanalization of symptomatic vertebral ostial occlusion in patients with acute or subacute stroke. AJNR Am J Neuroradiol 2013; 35:367-72. [PMID: 23907242 DOI: 10.3174/ajnr.a3681] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
SUMMARY Vertebral artery recanalization in symptomatic stenosis/occlusion remains controversial, as no definite evidence exists regarding this topic. There are only a few reports regarding the feasibility and safety of recanalization in the first segment of the vertebral artery with atherosclerotic vertebral ostial occlusion. We report our experience treating first segment occlusion in 8 patients and present a balloon protection technique used to reduce the thromboembolic burden during the stent placement procedure. The outcome at 3 months showed an mRS ≤2 except for a patient with a poor initial status with basilar artery occlusion. Revascularization of a rather long first segment occlusion is technically feasible and can be safely performed by use of embolic protection methods.
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Affiliation(s)
- S Park
- From the Department of Radiology and Research Institute of Radiology (S.P., D.-G.L., J.H.S., D.H.L., D.C.S.), University of Ulsan, College of Medicine, Asan Medical Center, Seoul, Korea
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49
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Jeong DW, Choi HC, Kim CH, Chang SH, Sohn CH, Park HJ, Kang TD, Cho DY, Baek SH, Eom CB, Shim JH, Yu J, Kim KW, Moon SJ, Noh TW. Temperature evolution of itinerant ferromagnetism in SrRuO3 probed by optical spectroscopy. Phys Rev Lett 2013; 110:247202. [PMID: 25165956 DOI: 10.1103/physrevlett.110.247202] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Indexed: 06/03/2023]
Abstract
The temperature (T) dependence of the optical conductivity spectra σ(ω) of a single crystal SrRuO(3) thin film is studied over a T range from 5 to 450 K. We observed significant T dependence of the spectral weights of the charge transfer and interband d-d transitions across the ferromagnetic Curie temperature (T(c) ∼ 150 K). Such T dependence was attributed to the increase in the Ru spin moment, which is consistent with the results of density functional theory calculations. T scans of σ(Ω,T) at fixed frequencies Ω reveal a clear T(2) dependence below T(c), demonstrating that the Stoner mechanism is involved in the evolution of the electronic structure. In addition, σ(Ω,T) continues to evolve at temperatures above T(c), indicating that the local spin moment persists in the paramagnetic state. This suggests that SrRuO(3) is an intriguing oxide system with itinerant ferromagnetism.
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Affiliation(s)
- D W Jeong
- Center for Functional Interfaces of Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 151-747, Korea and Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea
| | - Hong Chul Choi
- Department of Chemistry, Pohang University of Science and Technology, Pohang 790-784, Korea
| | - Choong H Kim
- Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea
| | - Seo Hyoung Chang
- Center for Functional Interfaces of Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 151-747, Korea and Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea
| | - C H Sohn
- Center for Functional Interfaces of Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 151-747, Korea and Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea
| | - H J Park
- Center for Functional Interfaces of Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 151-747, Korea and Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea
| | - T D Kang
- Center for Functional Interfaces of Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 151-747, Korea and Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea
| | - Deok-Yong Cho
- Center for Functional Interfaces of Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 151-747, Korea and Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea
| | - S H Baek
- Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | - C B Eom
- Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | - J H Shim
- Department of Chemistry, Pohang University of Science and Technology, Pohang 790-784, Korea and Division of Advanced Nuclear Engineering, Pohang University of Science and Technology, Pohang 790-784, Korea
| | - J Yu
- Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea
| | - K W Kim
- Department of Physics, Chungbuk National University, Cheongju 361-763, Korea
| | - S J Moon
- Department of Physics, Hanyang University, Seoul 133-791, Korea
| | - T W Noh
- Center for Functional Interfaces of Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 151-747, Korea and Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea
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50
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Neumann P, Jakobi I, Dolde F, Burk C, Reuter R, Waldherr G, Honert J, Wolf T, Brunner A, Shim JH. High-precision nanoscale temperature sensing using single defects in diamond. Nano Lett 2013; 13:2738-42. [PMID: 23721106 DOI: 10.1021/nl401216y] [Citation(s) in RCA: 216] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Measuring local temperature with a spatial resolution on the order of a few nanometers has a wide range of applications in the semiconductor industry and in material and life sciences. For example, probing temperature on the nanoscale with high precision can potentially be used to detect small, local temperature changes like those caused by chemical reactions or biochemical processes. However, precise nanoscale temperature measurements have not been realized so far owing to the lack of adequate probes. Here we experimentally demonstrate a novel nanoscale temperature sensing technique based on optically detected electron spin resonance in single atomic defects in diamonds. These diamond sensor sizes range from a micrometer down to a few tens of nanometers. We achieve a temperature noise floor of 5 mK/Hz(1/2) for single defects in bulk sensors. Using doped nanodiamonds as sensors the temperature noise floor is 130 mK/Hz(1/2) and accuracies down to 1 mK for nanocrystal sizes and therefore length scales of a few tens of nanometers. This combination of precision and position resolution, combined with the outstanding sensor photostability, should allow the measurement of the heat produced by chemical interactions involving a few or single molecules even in heterogeneous environments like cells.
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Affiliation(s)
- P Neumann
- 3rd Physikalisches Institut, Research Center Scope and IQST, University of Stuttgart, 70569 Stuttgart, Germany.
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