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Knisely JPS, Haghdel A, Chang SJ, Ramakrishna R, Cisse B, Schwartz TH, Brandmaier A, Lin E, Liechty BL, Pisapia DJ, Stieg P, Pannullo S, Ivanidze J. Progression-Free Survival in Patients with WHO-2 Meningioma Undergoing Active Surveillance Based on DOTATATE PET Evidence of Gross Total Resection: Prospective Observational Study. Int J Radiat Oncol Biol Phys 2023; 117:e118-e119. [PMID: 37784662 DOI: 10.1016/j.ijrobp.2023.06.905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) MRI is the standard of care for meningioma radiotherapy planning, but lacks sensitivity for postoperative small volume disease and osseous or parenchymal invasion. NRG-BN003 (NCT03180268) randomizes patients with WHO-2 meningiomas and MRI-determined gross total resection (GTR) to observation or 60 Gy IMRT to the resection bed. More sensitive and specific imaging biomarkers than MRI may improve clinical outcomes in meningioma by limiting unnecessary irradiation of normal tissues and improving radiotherapy targeting. [68Ga]-DOTATATE, a PET radiotracer targeting somatostatin receptor 2 (SSTR2) is a highly sensitive and specific meningioma biomarker. Our dedicated DOTATATE brain PET/MRI and PET/CT protocol allows meningioma differentiation from post-treatment change, using SUV analysis and Patlak modeling. Our prospective IRB-approved observational trial (NCT04081701) has imaged >100 patients with meningioma. In the sub-analysis presented here, we prospectively evaluated PFS in patients with WHO-2 tumors and postoperative GTR as determined by [68Ga]-DOTATATE brain PET/MRI or PET/CT who were managed solely with active surveillance. We hypothesized that the PFS of patients with GTR by PET managed with active surveillance would be higher than reported PFS data for patients with MRI-determined GTR, using NRG-BN003's observation arm (randomized trial comparing observation to fractionated RT) as a reference standard. MATERIALS/METHODS From the cohort of >100 patients with SSTR2-positive brain neoplasms enrolled between 9/2019 and 10/2022 and imaged according to our previously published protocol, a sub-cohort of patients were selected with WHO-2 meningioma, postoperative findings of GTR, and postoperative active surveillance with periodic MRI every 3-6 months. Kaplan-Meier survival analysis was performed. RESULTS A total of 12 patients met inclusion criteria. Mean patient age was 64 years and 5 (42%) were female. Mean follow up period was 23.4 months (range: 7-38). 83% (10/12) patients underwent postoperative PET/MRI and 17% (2/12) underwent PET/CT. 2 patients (17%) progressed, at 22 and 34 months, respectively; the remainder remain progression-free. Both patients who had progression were successfully salvaged with focal fractionated radiosurgery. Kaplan-Meier analysis demonstrated PFS at almost 3 years to be 75%, which is substantially higher than the reported 3-year PFS of 60% in the literature. Overall survival was 100%. CONCLUSION [68Ga]-DOTATATE PET can improve the specificity of imaging-based assessment of the extent of resection of WHO-2 meningiomas, thereby improving clinical outcomes. In this cohort of patients with completely resected WHO-2 meningiomas (as assessed by postoperative gadolinium-enhanced MRI and DOTATATE PET) who are conservatively managed, recurrences have been rare and amenable to radiosurgical salvage.
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Affiliation(s)
- J P S Knisely
- Weill Cornell Medical College/New York-Presbyterian Hospital, New York, NY
| | - A Haghdel
- Weill Cornell Medical College/New York-Presbyterian Hospital, New York, NY
| | - S J Chang
- Weill Cornell Medical College/New York-Presbyterian Hospital, New York, NY
| | - R Ramakrishna
- Weill Cornell Medical College/New York-Presbyterian Hospital, New York, NY
| | - B Cisse
- Weill Cornell Medical College/New York-Presbyterian Hospital, New York, NY
| | - T H Schwartz
- Weill Cornell Medical College/New York-Presbyterian Hospital, New York, NY
| | - A Brandmaier
- Weill Cornell Medical College/New York-Presbyterian Hospital, New York, NY
| | - E Lin
- Weill Cornell Medical College/New York-Presbyterian Hospital, New York, NY
| | - B L Liechty
- Weill Cornell Medical College/New York-Presbyterian Hospital, New York, NY
| | - D J Pisapia
- Weill Cornell Medical College/New York-Presbyterian Hospital, New York, NY
| | - P Stieg
- Weill Cornell Medical College/New York-Presbyterian Hospital, New York, NY
| | - S Pannullo
- Weill Cornell Medical College/New York-Presbyterian Hospital, New York, NY
| | - J Ivanidze
- Weill Cornell Medical College/New York-Presbyterian Hospital, New York, NY
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Chen YJ, Cheng HW, Yen WY, Tsai JH, Yeh CY, Chen CJ, Liu JT, Chen SY, Chang SJ. The Treatment of Keloid Scars via Modulating Heterogeneous Gelatin-Structured Composite Microneedles to Control Transdermal Dual-Drug Release. Polymers (Basel) 2022; 14:4436. [PMID: 36298014 PMCID: PMC9607586 DOI: 10.3390/polym14204436] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 10/02/2022] [Accepted: 10/15/2022] [Indexed: 07/29/2023] Open
Abstract
Keloid scarring is an abnormal scar disease characterised by excessive proliferation of fibroblasts and over-deposition of collagen during wound healing. Although various treatments for keloid scars have been developed, preventive medicine is believed to be a promising strategy. The skin barrier limits the gentle topical administration of medicaments such as creams and hydrogel dressings, resulting in reduced therapeutic efficacy. In recent years, microneedles (MNs) have been regarded as an appreciable device for topical administration without inducing side effects, and they are painless and do not cause bleeding. In this study, an MN patch with controlled transdermal dual-drug release was developed to achieve combinatory treatment of keloid scars using a heterogeneous gelatin-structured composite MN. Gelatin hydrogel was used as a substrate to load gallic acid (GA) and quercetin-loaded amphiphilic gelatin nanoparticles to fabricate dual-drug heterogeneous composite MNs. The results of the insertion test and mechanical properties of the MNs showed that the heterogeneous composite MN patches could be self-pressed into the stratum corneum and control dual-drug release at different time periods. GA was released at an earlier stage to retard the proliferation of fibroblasts, and quercetin was released at a later stage as a strong antioxidant to erase the generation of reactive oxygen species. Furthermore, real-time quantitative polymerase chain reaction data indicated that the gene expression of fibroblasts (such as Col I and III) was downregulated in the dual-drug system. The above results demonstrate that using heterogeneous composite MNs with the combination of dual-drug pharmacology is beneficial for preventing keloid scar formation.
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Affiliation(s)
- Yong-Ji Chen
- Department of Biomedical Engineering, I-Shou University, Kaohsiung 82445, Taiwan
| | - Hung-Wei Cheng
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
| | - Wan-Yu Yen
- Department of Biomedical Engineering, I-Shou University, Kaohsiung 82445, Taiwan
| | - Jen-Hao Tsai
- Department of Biomedical Engineering, I-Shou University, Kaohsiung 82445, Taiwan
| | - Chin-Yi Yeh
- Department of Biomedical Engineering, I-Shou University, Kaohsiung 82445, Taiwan
| | - Ching-Jung Chen
- Research Center for Materials Science and Opti-Electronic Technology, School of Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jen Tsai Liu
- Research Center for Materials Science and Opti-Electronic Technology, College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - San-Yuan Chen
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
- Graduate Institute of Biomedical Science, China Medical University, Taichung 406040, Taiwan
- School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Shwu-Jen Chang
- Department of Biomedical Engineering, I-Shou University, Kaohsiung 82445, Taiwan
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Chiang MY, Cheng IY, Chou SH, Tsai JH, Chen YJ, Lu HE, Yang SW, Chang SJ, Chen SY. A smart injectable composite hydrogel with magnetic navigation and controlled glutathione release for promoting in situ chondrocyte array and self-healing in damaged cartilage tissue. J Mater Chem B 2021; 9:9370-9382. [PMID: 34726686 DOI: 10.1039/d1tb02030g] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Injectable cell-based hydrogels allow surgical operation in a minimally invasive way for articular cartilage lesions but the chondrocytes in the injectable hydrogels are difficultly arrayed and fixed at the site of interest to repair the cartilage tissue. In this study, an injectable hyaluronic acid-polyacrylic acid (HA-pAA) hydrogel was first synthesized using hyaluronic acid-cyclodextrin (HA-CD) and polyacrylic acid-ferrocene (pAA-Fc) to provide cell-delivery and self-healing. To promote the cell fixation and alignment, porous poly(lactic-co-glycolic acid) (PLGA) magnetic microcapsules (PPMMs) with glutathione (GSH) loaded and iron oxide nanoparticles (IO) located in the shell were designed. The GSH-loaded PPMMs with layer-by-layer (LbL) assembly of hyaluronic acid (HA) and GSH (LbL-PPMMs) can provide a two-stage rapid and slow release of GSH to modulate the self-healing of the HA-pAA hydrogel at the injured site. Furthermore, the chondrocytes embedded in the HA-pAA hydrogel could be delivered through CD44 receptors on the HA polymer chains of LbL-PPMMs toward the surface of the damaged site by an internal magnetic force. The composite hydrogel system of chondrocytes/LbL-PPMMs/HA-pAA can provide the damaged cartilage with a more even and smooth surface than other groups in a rabbit model after 8 weeks of implantation. In addition, the chondrocytes in the deep zone tissue exhibit a columnar array, similar to the cell arrangement in normal cartilage tissue. Together with the cell navigation behavior and GSH release from the LbL-PPMM/HA-pAA hydrogel, a full closure of lesions on the cartilage tissue can be achieved. Our results demonstrate the highly promising potential of the injectable LbL-PPMM/HA-pAA system in cartilage tissue repair.
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Affiliation(s)
- Min-Yu Chiang
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, No. 1001, Ta-Hsueh Rd., Hsinchu 30010, Taiwan.
| | - I-Yun Cheng
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, No. 1001, Ta-Hsueh Rd., Hsinchu 30010, Taiwan.
| | - Syun-Hong Chou
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, No. 1001, Ta-Hsueh Rd., Hsinchu 30010, Taiwan.
| | - Jen-Hao Tsai
- Department of Biomedical Engineering, I-Shou University (Yanchao Campus), No. 8, Yida Rd., Jiaosu Village, Yanchao District, Kaohsiung City 82445, Taiwan.
| | - Yong-Ji Chen
- Department of Biomedical Engineering, I-Shou University (Yanchao Campus), No. 8, Yida Rd., Jiaosu Village, Yanchao District, Kaohsiung City 82445, Taiwan.
| | - Huai-En Lu
- Food Industry Research and Development Institute, Hsinchu 300193, Taiwan
| | - Shan-Wei Yang
- Department of Orthopedics, Kaohsiung Veterans General Hospital, No. 386, Dazhong 1st Rd., Zuoying Dist., Kaohsiung City 813414, Taiwan.
| | - Shwu-Jen Chang
- Department of Biomedical Engineering, I-Shou University (Yanchao Campus), No. 8, Yida Rd., Jiaosu Village, Yanchao District, Kaohsiung City 82445, Taiwan.
| | - San-Yuan Chen
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, No. 1001, Ta-Hsueh Rd., Hsinchu 30010, Taiwan. .,Graduate Institute of Biomedical Science, China Medical University, Taichung City 406040, Taiwan.,Frontier Research Centre on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 300044, Taiwan.,School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung City 80708, Taiwan
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Chiang MY, Lo YC, Lai YH, Yong YYA, Chang SJ, Chen WL, Chen SY. Protein-based soft actuator with high photo-response and easy modulation for anisotropic cell alignment and proliferation in a liquid environment. J Mater Chem B 2021; 9:6634-6645. [PMID: 34365493 DOI: 10.1039/d1tb01198g] [Citation(s) in RCA: 6] [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: 11/21/2022]
Abstract
Cell alignment and elongation, which are critical factors correlated with differentiation and maturation in cell biology and tissue engineering, have been widely studied in organisms. Several strategies such as external mechanical strain, geometric topography, micropatterning approaches, and microfabricated substrates have been developed to guide cell alignment, but these methodologies cannot be used for easily denatured natural proteins to modulate the cell behaviour. Herein, for the first time, a novel biocompatible light-controlled protein-based bilayer soft actuator composed of elastin-like polypeptides (ELPs), silk fibroin (SF), graphene oxide (GO), and reduced graphene oxide (rGO), named ESGRG, is developed for efficiently driving cellular orientation and elongation with anisotropic features on soft actuator via remote NIR laser exposure. The actuation of ESGRG could be manipulated by modulating the intensity of NIR and the relative ratio of GO to rGO for promoting myoblasts alignment and nucleus elongation to generate different motions. The results indicate that the YAP and MHC protein expression of C2C12 skeletal muscle cells on ESGRG can be rapidly induced and enhanced by controlling the relative ratio of rGO/GO = 1/4 at a multiple-cycle stimulation with a very low power intensity of 1.2 W cm-2 in friendly liquid environments. This study demonstrates that the ESGRG hydrogel actuator system can modulate the cell-level behaviors via light-driven cyclic bending-motions and can be utilized in applications of soft robotic and tissue engineering such as artificial muscle and maturation of cardiomyocytes.
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Affiliation(s)
- Min-Yu Chiang
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, No. 1001 Ta-Hsueh Rd, Hsinchu, Taiwan 300, Republic of China.
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Chiang MY, Cheng HW, Lo YC, Wang WC, Chang SJ, Cheng CH, Lin YC, Lu HE, Sue MW, Tsou NT, Lo YC, Li SJ, Kuo CH, Chen YY, Huang WC, Chen SY. 4D spatiotemporal modulation of biomolecules distribution in anisotropic corrugated microwrinkles via electrically manipulated microcapsules within hierarchical hydrogel for spinal cord regeneration. Biomaterials 2021; 271:120762. [PMID: 33773400 DOI: 10.1016/j.biomaterials.2021.120762] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 02/28/2021] [Accepted: 03/12/2021] [Indexed: 01/12/2023]
Abstract
Although traditional 3D scaffolds or biomimetic hydrogels have been used for tissue engineering and regenerative medicine, soft tissue microenvironment usually has a highly anisotropic structure and a dynamically controllable deformation with various biomolecule distribution. In this study, we developed a hierarchical hybrid gelatin methacrylate-microcapsule hydrogel (HGMH) with Neurotrophin-3(NT-3)-loaded PLGA microcapsules to fabricate anisotropic structure with patterned NT-3 distribution (demonstrated as striped and triangular patterns) by dielectrophoresis (DEP). The HGMH provides a dynamic biomimetic sinuate-microwrinkles change with NT-3 spatial gradient and 2-stage time-dependent distribution, which was further simulated using a 3D finite element model. As demonstrated, in comparison with striped-patterned hydrogel, the triangular-patterned HGMH with highly anisotropic array of microcapsules exhibits remarkably spatial NT-3 gradient distributions that can not only guide neural stem cells (NSCs) migration but also facilitate spinal cord injury regeneration. This approach to construct hierarchical 4D hydrogel system via an electromicrofluidic platform demonstrates the potential for building various biomimetic soft scaffolds in vitro tailed to real soft tissues.
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Affiliation(s)
- Min-Yu Chiang
- Department of Materials Science and Engineering, National Chiao Tung University, No. 1001 Ta-Hsueh Rd., Hsinchu, 300, Taiwan, ROC; Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, No. 1001 Ta-Hsueh Rd., Hsinchu, 300, Taiwan, ROC
| | - Hung-Wei Cheng
- Department of Materials Science and Engineering, National Chiao Tung University, No. 1001 Ta-Hsueh Rd., Hsinchu, 300, Taiwan, ROC; Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, No. 1001 Ta-Hsueh Rd., Hsinchu, 300, Taiwan, ROC
| | - Yu-Chih Lo
- Department of Materials Science and Engineering, National Chiao Tung University, No. 1001 Ta-Hsueh Rd., Hsinchu, 300, Taiwan, ROC; Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, No. 1001 Ta-Hsueh Rd., Hsinchu, 300, Taiwan, ROC
| | - Wei-Chun Wang
- Department of Materials Science and Engineering, National Chiao Tung University, No. 1001 Ta-Hsueh Rd., Hsinchu, 300, Taiwan, ROC; Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, No. 1001 Ta-Hsueh Rd., Hsinchu, 300, Taiwan, ROC
| | - Shwu-Jen Chang
- Department of Biomedical Engineering, I-Shou University, No.8, Yida Rd., Jiaosu Village, Kaohsiung, 840, Taiwan, ROC
| | - Chu-Hsun Cheng
- Institute of Pharmacology, School of Medicine, National Yang Ming University, No. 155, Sec. 2, Linong Street, Taipei, 112, Taiwan, ROC; Institute of Pharmacology, School of Medicine, National Yang Ming Chiao Tung University, No. 1001 Ta-Hsueh Rd., Hsinchu, 300, Taiwan, ROC; Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, No. 201, Sec. 2, Shipai Rd., Taipei, 112, Taiwan, ROC
| | - Yu-Chang Lin
- Department of Materials Science and Engineering, National Chiao Tung University, No. 1001 Ta-Hsueh Rd., Hsinchu, 300, Taiwan, ROC; Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, No. 1001 Ta-Hsueh Rd., Hsinchu, 300, Taiwan, ROC
| | - Huai-En Lu
- Food Industry Research and Development Institute, No. 331 Shih-Pin Rd., Hsinchu, 300, Taiwan, ROC
| | - Ming-Wen Sue
- Food Industry Research and Development Institute, No. 331 Shih-Pin Rd., Hsinchu, 300, Taiwan, ROC
| | - Nien-Ti Tsou
- Department of Materials Science and Engineering, National Chiao Tung University, No. 1001 Ta-Hsueh Rd., Hsinchu, 300, Taiwan, ROC; Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, No. 1001 Ta-Hsueh Rd., Hsinchu, 300, Taiwan, ROC
| | - Yu-Chun Lo
- Program for Neural Regenerative Medicine, College of Medical Science and Technology, Taipei Medical University, No. 250 Wu-Xing Street, Taipei, 110, Taiwan, ROC
| | - Ssu-Ju Li
- Department of Biomedical Engineering, National Yang Ming University, No. 155, Section 2, Linong Street, Taipei, 112, Taiwan, ROC; Department of Biomedical Engineering, National Yang Ming Chiao Tung University, No. 1001 Ta-Hsueh Rd., Hsinchu, 300, Taiwan, ROC
| | - Chao-Hung Kuo
- Institute of Pharmacology, School of Medicine, National Yang Ming Chiao Tung University, No. 1001 Ta-Hsueh Rd., Hsinchu, 300, Taiwan, ROC; Department of Biomedical Engineering, National Yang Ming University, No. 155, Section 2, Linong Street, Taipei, 112, Taiwan, ROC; Department of Biomedical Engineering, National Yang Ming Chiao Tung University, No. 1001 Ta-Hsueh Rd., Hsinchu, 300, Taiwan, ROC; Department of Neurological Surgery, University of Washington, No. 1959 NE Pacific Street, Seattle, WA, 98195-6470, USA
| | - You-Yin Chen
- Program for Neural Regenerative Medicine, College of Medical Science and Technology, Taipei Medical University, No. 250 Wu-Xing Street, Taipei, 110, Taiwan, ROC; Department of Biomedical Engineering, National Yang Ming University, No. 155, Section 2, Linong Street, Taipei, 112, Taiwan, ROC; Department of Biomedical Engineering, National Yang Ming Chiao Tung University, No. 1001 Ta-Hsueh Rd., Hsinchu, 300, Taiwan, ROC.
| | - Wei-Chen Huang
- Department of Electrical and Computer Engineering, National Chiao Tung University, No. 1001 Ta-Hsueh Rd., Hsinchu, 300, Taiwan, ROC; Department of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, No. 1001 Ta-Hsueh Rd., Hsinchu, 300, Taiwan, ROC.
| | - San-Yuan Chen
- Department of Materials Science and Engineering, National Chiao Tung University, No. 1001 Ta-Hsueh Rd., Hsinchu, 300, Taiwan, ROC; Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, No. 1001 Ta-Hsueh Rd., Hsinchu, 300, Taiwan, ROC; Frontier Research Centre on Fundamental and Applied Sciences of Matters, National Tsing Hua University, No. 101-1, Sec. 2, Guangfu Rd., Hsinchu, 300, Taiwan, ROC; School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, No.100, Shih-Chuan 1st Rd., Kaohsiung, 807, Taiwan, ROC; Graduate Institute of Biomedical Science, China Medical University, No. 100, Sec. 1, Jingmao Rd., Taichung, 406, Taiwan, ROC.
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Chen QY, Chang L, Qiu YJ, Ying HR, Chang SJ, Zhang Y, Chen ZA, Ma G, Lin XX. Comparison of the efficacy between topical timolol and pulsed dye laser in the treatment of ulcerated infantile haemangiomas: a randomized controlled study. J Eur Acad Dermatol Venereol 2020; 35:e303-e305. [PMID: 33289216 DOI: 10.1111/jdv.17057] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Q Y Chen
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - L Chang
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Y J Qiu
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - H R Ying
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - S J Chang
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Y Zhang
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Z A Chen
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - G Ma
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Department of Laser and Aesthetic Medicine, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - X X Lin
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Department of Laser and Aesthetic Medicine, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
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Kang PL, Lin YH, Settu K, Yen CS, Yeh CY, Liu JT, Chen CJ, Chang SJ. A Facile Fabrication of Biodegradable and Biocompatible Cross-Linked Gelatin as Screen Printing Substrates. Polymers (Basel) 2020; 12:polym12051186. [PMID: 32456005 PMCID: PMC7284702 DOI: 10.3390/polym12051186] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 05/15/2020] [Accepted: 05/19/2020] [Indexed: 01/06/2023] Open
Abstract
This study focuses on preparation and valuation of the biodegradable, native, and modified gelatin film as screen-printing substrates. Modified gelatin film was prepared by crosslinking with various crosslinking agents and the electrode array was designed by screen-printing. It was observed that the swelling ratio of C-2, crosslinked with glutaraldehyde and EDC/NHS (1-ethyl-3-(3-dimethylaminopropyl) carbodiimide/N-hydroxysuccinimide) was found to be lower (3.98%) than that of C-1 (crosslinked with only glutaraldehyde) (8.77%) and C-0 (without crosslinking) (28.15%). The obtained results indicate that the swelling ratios of both C-1 and C-2 were found to be lower than that of C-0 (control one without crosslinking). The Young's modulus for C-1 and C-2 was found to be 8.55 ± 0.57 and 23.72 ± 2.04 kPa, respectively. Hence, it was conveyed that the mechanical strength of C-2 was found to be two times higher than that of C-l, suggesting that the mechanical strength was enhanced upon dual crosslinking in this study also. The adhesion study indicates that silver ink adhesion on the gelation surface is better than that of carbon ink. In addition, the electrical response of C-2 with a screen-printed electrode (SPE) was found to be the same as the commercial polycarbonate (PC) substrate. The result of MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide) assay suggested that the silver SPE on C-2 was non-cytotoxic toward L929 fibroblast cells proliferation. The results indicated that C-2 gelatin is a promising material to act as a screen-printing substrate with excellent biodegradable and biocompatible properties.
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Affiliation(s)
- Pei-Leun Kang
- Cardiovascular Surgery, Department of Surgery, Kaohsiung Veterans General Hospital, Kaohsiung 81362, Taiwan; (P.-L.K.); (Y.-H.L.)
| | - Yu-Hsin Lin
- Cardiovascular Surgery, Department of Surgery, Kaohsiung Veterans General Hospital, Kaohsiung 81362, Taiwan; (P.-L.K.); (Y.-H.L.)
| | - Kalpana Settu
- Department of Electrical Engineering, National Taipei University, New Taipei 23741, Taiwan;
| | - Ching-Shu Yen
- Department of Biomedical Engineering, I-Shou University, Kaohsiung 82445, Taiwan; (C.-S.Y.); (C.-Y.Y.)
| | - Chin-Yi Yeh
- Department of Biomedical Engineering, I-Shou University, Kaohsiung 82445, Taiwan; (C.-S.Y.); (C.-Y.Y.)
| | - Jen-Tsai Liu
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China
- Correspondence: (J.-T.L.); (C.-J.C.); (S.-J.C.); Tel.: +886-76151100-7467 (S.-J.C.)
| | - Ching-Jung Chen
- School of Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China
- Correspondence: (J.-T.L.); (C.-J.C.); (S.-J.C.); Tel.: +886-76151100-7467 (S.-J.C.)
| | - Shwu-Jen Chang
- Department of Biomedical Engineering, I-Shou University, Kaohsiung 82445, Taiwan; (C.-S.Y.); (C.-Y.Y.)
- Correspondence: (J.-T.L.); (C.-J.C.); (S.-J.C.); Tel.: +886-76151100-7467 (S.-J.C.)
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Chiang CS, Chen JY, Chiang MY, Hou KT, Li WM, Chang SJ, Chen SY. Using the interplay of magnetic guidance and controlled TGF-β release from protein-based nanocapsules to stimulate chondrogenesis. Int J Nanomedicine 2018; 13:3177-3188. [PMID: 29922054 PMCID: PMC5995423 DOI: 10.2147/ijn.s156284] [Citation(s) in RCA: 14] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Introduction Stimulating the proliferation and differentiation of chondrocytes for the regeneration of articular cartilage is a promising strategy, but it is currently ineffective. Although both physical stimulation and growth factors play important roles in cartilage repair, their interplay remains unclear and requires further investigation. In this study, we aimed to clarify their contribution using a magnetic drug carrier that not only can deliver growth factors but also provide an external stimulation to cells in the two-dimensional environment. Materials and methods We developed a nanocapsule (transforming growth factor-β1 [TGF-β1]-loaded magnetic amphiphilic gelatin nanocapsules [MAGNCs]; TGF-β1@MAGNCs) composed of hexanoic-anhydride-grafted gelatin and iron oxide nanoparticles to provide a combination treatment of TGF-β1 and magnetically induced physical stimuli. With the expression of Arg-Gly-Asp peptide in the gelatin, the TGF-β1@MAGNCs have an inherent affinity for chondrogenic ATDC5 cells. Results In the absence of TGF-β1, ATDC5 cells treated with a magnetic field show significantly upregulated Col2a1 expression. Moreover, TGF-β1 slowly released from biodegradable TGF-β1@ MAGNCs further improves the differentiation with increased expression of Col2a1 and Aggrecan. Conclusion Our study shows the time-dependent interplay of physical stimuli and growth factors on chondrogenic regeneration, and demonstrates the promising use of TGF-β1@MAGNCs for articular cartilage repair.
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Affiliation(s)
- Chih-Sheng Chiang
- Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, Taiwan
| | - Jian-Yi Chen
- Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, Taiwan
| | - Min-Yu Chiang
- Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, Taiwan
| | - Kai-Ting Hou
- Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, Taiwan
| | - Wei-Ming Li
- Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, Taiwan
| | - Shwu-Jen Chang
- Department of Biomedical Engineering, I-Shou University, Kaohsiung, Taiwan
| | - San-Yuan Chen
- Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, Taiwan
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Yang SW, Ku KC, Chen SY, Kuo SM, Chen IF, Wang TY, Chang SJ. Development of chondrocyte-seeded electrosprayed nanoparticles for repair of articular cartilage defects in rabbits. J Biomater Appl 2017; 32:800-812. [DOI: 10.1177/0885328217740729] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Due to limited self-healing capacity in cartilages, there is a rising demand for an innovative therapy that promotes chondrocyte proliferation while maintaining its biofunctionality for transplantation. Chondrocyte transplantation has received notable attention; however, the tendencies of cell de-differentiation and de-activation of biofunctionality have been major hurdles in its development, delaying this therapy from reaching the clinic. We believe it is due to the non-stimulative environment in the injured cartilage, which is unable to provide sustainable physical and biological supports to the newly grafted chondrocytes. Therefore, we evaluated whether providing an appropriate matrix to the transplanted chondrocytes could manipulate cell fate and recovery outcomes. Here, we proposed the development of electrosprayed nanoparticles composed of cartilage specific proteins, namely collagen type II and hyaluronic acid, for implantation with pre-seeded chondrocytes into articular cartilage defects. The fabricated nanoparticles were pre-cultured with chondrocytes before implantation into injured articular cartilage. The study revealed a significant potential for nanoparticles to support pre-seeded chondrocytes in cartilage repair, serving as a protein delivery system while improving the survival and biofunctionality of transplanted chondrocytes for prolonged period of time.
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Affiliation(s)
- Shan-Wei Yang
- Department of Orthopedics, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
| | - Kai-Chi Ku
- Department of Biomedical Engineering, I-Shou University, Kaohsiung, Taiwan
| | - Shu-Ying Chen
- Department of Biomedical Engineering, I-Shou University, Kaohsiung, Taiwan
| | - Shyh-Ming Kuo
- Department of Biomedical Engineering, I-Shou University, Kaohsiung, Taiwan
| | - I-Fen Chen
- Department of Biomedical Engineering, I-Shou University, Kaohsiung, Taiwan
| | - Ting-Yi Wang
- NanoBiotechnology Laboratory, Australian Centre for Blood Diseases, Monash University, Melbourne, Australia
| | - Shwu-Jen Chang
- Department of Biomedical Engineering, I-Shou University, Kaohsiung, Taiwan
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Chiang MY, Lin YZ, Chang SJ, Shyu WC, Lu HE, Chen SY. Direct Reprogramming of Human Suspension Cells into Mesodermal Cell Lineages via Combined Magnetic Targeting and Photothermal Stimulation by Magnetic Graphene Oxide Complexes. Small 2017; 13:1700703. [PMID: 28665509 DOI: 10.1002/smll.201700703] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 05/08/2017] [Indexed: 06/07/2023]
Abstract
Suspension cells can provide a source of cells for cellular reprogramming, but they are difficult to transfect by nonviral vectors. An efficient and safe nonviral vector (GO-Fe3 O4 -PEI complexes) based on iron oxide nanoparticle (Fe3 O4 )-decorated graphene oxide (GO) complexed with polyethylenimine (PEI) for the first time is developed for delivering three individual episomal plasmids (pCXLE-hOCT3/4-shp53, pCXLE-hSK, and pCXLE-hUL) encoding pluripotent-related factors of Oct3/4, shRNA against p53, Sox2, Klf4, L-Myc, and Lin28 into human peripheral blood mononuclear cells (PBMCs) simultaneously. The combined treatment of magnetic stirring and near-infrared (NIR)-laser irradiation, which can promote contact between the complexes and floating cells and increase the cell membrane permeability, respectively, is used to conduct multiple physical stimulations for suspension PBMCs transfection. The PCR analysis shows that the combinatorial effect of magnetic targeting and photothermal stimulation obviously promoted the transfection efficiency of suspension cells. The transfected cells show positive expression of the pluripotency markers, including Nanog, Oct4, and Sox2, and have potential to differentiate into mesoderm and ectoderm cells. The results demonstrate that the GO-Fe3 O4 -PEI complex provides a safe, convenient, and efficient tool for reprogramming PBMCs into partially induced pluripotent stem cells, which are able to rapidly transdifferentiate into mesodermal lineages without full reprogramming.
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Affiliation(s)
- Min-Yu Chiang
- Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, 30010, Taiwan, ROC
| | - Yi-Zhen Lin
- Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, 30010, Taiwan, ROC
| | - Shwu-Jen Chang
- Department of Biomedical Engineering, I-Shou University (Yanchao Campus), Kaohsiung, 82445, Taiwan, ROC
| | - Woei-Cherng Shyu
- Graduate Institute of Biomedical Science, China Medical University, Taichung, 40402, Taiwan, ROC
- Translational Medicine Research Center and Department of Neurology, China Medical University & Hospital, Taichung, 40447, Taiwan, ROC
| | - Huai-En Lu
- Bioresource Collection and Research Center, Food Industry Research and Development Institute, Hsinchu, 30062, Taiwan, ROC
| | - San-Yuan Chen
- Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, 30010, Taiwan, ROC
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Chang SJ, Hung SY, Liu YL, Jiang SH, Wu J. Evaluation of dose conversion coefficients for external exposure using Taiwanese reference man and woman. Radiat Prot Dosimetry 2015; 167:247-250. [PMID: 25944957 DOI: 10.1093/rpd/ncv255] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Reference man has been widely used for external and internal dose evaluation of radiation protection. The parameters of the mathematical model of organs suggested by the International Commission of Radiological Protection (ICRP) are adopted from the average data of Caucasians. However, the organ masses of Asians are significantly different from the data of Caucasians, leading to potentially dosimetric errors. In this study, a total of 40 volunteers whose heights and weights corresponded to the statistical average of Taiwanese adults were recruited. Magnetic resonance imaging was performed, and T2-weighted images were acquired. The Taiwanese reference man and woman were constructed according to the measured organ masses. The dose conversion coefficients (DCFs) for anterior-posterior (AP), posterior-anterior (PA), right lateral (RLAT) and left lateral (LLAT) irradiation geometries were simulated. For the Taiwanese reference man, the average differences of the DCFs compared with the results of ICRP-74 were 7.6, 5.1 and 11.1 % for 0.1, 1 and 10 MeV photons irradiated in the AP direction. The maximum difference reached 51.7 % for the testes irradiated by 10 MeV photons. The size of the trunk, the volume and the geometric position of organs can cause a significant impact on the DCFs for external exposure of radiation. The constructed Taiwanese reference man and woman can be used in radiation protection to increase the accuracy of dose evaluation for the Taiwanese population.
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Affiliation(s)
- S J Chang
- Institute of Nuclear Engineering and Science, National Tsing Hua University, Hsinchu, Taiwan, ROC Health Physics Division, Institute of Nuclear Energy Research, Taoyuan, Taiwan, ROC
| | - S Y Hung
- Department of Medical Imaging, Chi Mei Medical Center, Liouying, Tainan, Taiwan, ROC Department of Medical Imaging and Radiological Science, Central Taiwan University of Science and Technology, Taichung, Taiwan, ROC
| | - Y L Liu
- Institute of Nuclear Engineering and Science, National Tsing Hua University, Hsinchu, Taiwan, ROC
| | - S H Jiang
- Institute of Nuclear Engineering and Science, National Tsing Hua University, Hsinchu, Taiwan, ROC
| | - J Wu
- Department of Biomedical Imaging and Radiological Sciences, National Yang-Ming University, Taipei, Taiwan, ROC
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Abstract
Xanthogranulomatous inflammation is a rare pathological condition most frequently detected in the kidney and gallbladder. Reported herein is a case of xanthogranulomatous inflammation in a 51-year-old male presenting as a mass-forming lesion in the terminal ileum with mucosal ulceration. Diagnostic laparoscopy followed by ileocecectomy was performed due to intra-operative suspicion of carcinoma of appendix. This is a report of the condition involving the terminal ileum with mucosal ulceration and full-thickness involvement of bowel wall which are uncommon features of xanthogranulomatous inflammation in previously reported lower gastro-intestinal tract lesions.
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Affiliation(s)
- K C Wong
- Department of Surgery, Caritas Medical Centre, Shamshuipo, Hong Kong
| | - Wilson M S Tsui
- Department of Pathology, Caritas Medical Centre, Shamshuipo, Hong Kong
| | - S J Chang
- Department of Surgery, Caritas Medical Centre, Shamshuipo, Hong Kong
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Teong B, Lin CY, Chang SJ, Niu GCC, Yao CH, Chen IF, Kuo SM. Enhanced anti-cancer activity by curcumin-loaded hydrogel nanoparticle derived aggregates on A549 lung adenocarcinoma cells. J Mater Sci Mater Med 2015; 26:5357. [PMID: 25595721 DOI: 10.1007/s10856-014-5357-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2014] [Accepted: 09/12/2014] [Indexed: 06/04/2023]
Abstract
To investigate the anti-cancer activity of curcumin-loaded hydrogel nanoparticle derived aggregates on A549 lung adenocarcinoma cells. Curcumin was incorporated with biopolymeric chitosan, gelatin, and hyaluronan nanoparticles using an electrostatic field system. Characteristics of curcumin-loaded aggregates were examined including size and morphology, incorporation efficiency, stability and in vitro release. Treatment effect on A549 cells were assessed with cell viability assay, apoptosis assay, cell cycle analysis, reactive oxygen species detection, and Western blot. Observation from transmission electron microscopy show that the prepared biopolymeric nanoparticles were approximately 3-4 nm in diameter and that the size of the aggregates increased to approximately 26-55 nm after the incorporation of curcumin with the nanoparticles. The incorporation efficiency of curcumin into the chitosan, gelatin, and hyaluronan nanoparticles was 81, 67, and 78 % respectively. The formation of hyaluronan/curcumin and gelatin/curcumin aggregates seems to improve the stability of curcumin drug. The chitosan/curcumin aggregate has a faster release of curcumin than gelatin/curcumin and hyaluronan/curcumin aggregates. Treatment with chitosan/curcumin, gelatin/curcumin and hyaluronan/curcumin aggregates resulted in higher apoptosis rates of 45, 40 and 32 %, respectively, as compared to pure curcumin (less than 20 %) via Annexin V-FITC/PI analysis. Chitosan/curcumin aggregates induce the highest apoptosis effect (indicated by sub-G1 phase). In summary, chitosan/curcumin, gelatin/curcumin, and hyaluronan/curcumin aggregates represent higher anticancer proliferation properties in A549 cells than curcumin alone that exhibit great potential enhancement by either using fewer drugs or a decreased duration.
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Affiliation(s)
- Benjamin Teong
- Department of Biomedical Engineering, I-Shou University, Kaohsiung, Taiwan
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Chuang KS, Lu JC, Lin HH, Dong SL, Yang HJ, Shih CT, Lin CH, Yao WJ, Ni YC, Jan ML, Chang SJ. Improvements on a patient-specific dose estimation system in nuclear medicine examination. Radiat Prot Dosimetry 2014; 158:1-7. [PMID: 23901136 DOI: 10.1093/rpd/nct186] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The purpose of this paper is to develop a patient-specific dose estimation system in nuclear medicine examination. A dose deposition routine to store the deposited energy of the photons during their flights was embedded in the widely used SimSET Monte Carlo code and a user-friendly interface for reading PET and CT images was developed. Dose calculated on ORNL phantom was used to validate the accuracy of this system. The ratios of S value for (99m)Tc, (18)F and (131)I computed by this system to those obtained with OLINDA for various organs were ranged from 0.93 to 1.18, which were comparable to that obtained from MCNPX2.6 code (0.88-1.22). Our system developed provides opportunity for tumor dose estimation which cannot be known from the MIRD. The radiation dose can provide useful information in the amount of radioisotopes to be administered in radioimmunotherapy.
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Affiliation(s)
- K S Chuang
- Department of Biomedical Engineering and Environmental Sciences, National Tsing-Hua University, 101 Section II, Kwang-Fu Rd, Hsin-Chu 30013, Taiwan
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15
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Shen SC, Chang SJ, Yeh CY, Teng PC. Design and testing of a uniformly solar energy TIR-R concentration lenses for HCPV systems. Opt Express 2013; 21 Suppl 6:A942-A952. [PMID: 24514935 DOI: 10.1364/oe.21.00a942] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In this paper, total internal reflection-refraction (TIR-R) concentration (U-TIR-R-C) lens module were designed for uniformity using the energy configuration method to eliminate hot spots on the surface of solar cell and increase conversion efficiency. The design of most current solar concentrators emphasizes the high-power concentration of solar energy, however neglects the conversion inefficiency resulting from hot spots generated by uneven distributions of solar energy concentrated on solar cells. The energy configuration method proposed in this study employs the concept of ray tracing to uniformly distribute solar energy to solar cells through a U-TIR-R-C lens module. The U-TIR-R-C lens module adopted in this study possessed a 76-mm diameter, a 41-mm thickness, concentration ratio of 1134 Suns, 82.6% optical efficiency, and 94.7% uniformity. The experiments demonstrated that the U-TIR-R-C lens module reduced the core temperature of the solar cell from 108 °C to 69 °C and the overall temperature difference from 45 °C to 10 °C, and effectively relative increased the conversion efficiency by approximately 3.8%. Therefore, the U-TIR-R-C lens module designed can effectively concentrate a large area of sunlight onto a small solar cell, and the concentrated solar energy can be evenly distributed in the solar cell to achieve uniform irradiance and effectively eliminate hot spots.
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Ku KC, Lee MW, Kuo SM, Yao CH, Chang SJ. Preparation and evaluation of collagen I/ gellan gum/β-TCP microspheres as bone graft substitute materials. Annu Int Conf IEEE Eng Med Biol Soc 2013; 2013:6667-70. [PMID: 24111272 DOI: 10.1109/embc.2013.6611085] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Collagen I is the main component of protein in bone and exhibits many excellent applications in biomedical fields. Gellan gum possesses good biocompatible, biodegradable and good mechanical property, and shows great potentials as tissue engineering scaffold or cell culture substrate. Therefore, the aim of this study was to use collagen I, gellan gum and β-TCP to prepare collagen I/gellan gum/β-TCP microspheres by emulsion method as bone graft substitute materials. The preliminary results showed that collagen I/gellan gum/β-TCP microspheres had particle size distribution between 500-1000 µP in diameter and exhibited better mechanical strength. These microspheres also showed good biocompatibility in cell activity test.
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Chang SJ, Kuo SM, You JL, Wu YR, Chen SY, Lee MW. Physical and biological effects of gellan gum on decreasing postoperative adhesion in a rat model. J BIOACT COMPAT POL 2013. [DOI: 10.1177/0883911513475942] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
An antiadhesion membrane made from gellan gum was fabricated and characterized. A 12-µm-thick membrane of gellan gum was prepared and reacted with 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide to obtain a cross-linked membrane (G/A70) with 87% gel content and a tensile strength of 46.5 MPa. In vivo, the G/A70 membrane had 90% less tissue adhesion. Inflammation-related and extracellular matrix protein gene expression in a rat model of abdominal surgery was found by real-time quantitative reverse transcription polymerase chain reaction analysis. On day 3, after surgery, the gene expression of ceruloplasmin and type V collagen in the G/A70-treated group was 1.9 and 0.3 times that of the control group, respectively. The G/A70 membrane elicited mild inflammation but suppressed type V collagen synthesis and reduced the occurrence of tissue adhesion. These findings provide insights into the properties of gellan gum antiadhesion membranes and help to overcome problems involving tissue adhesions in surgical procedures.
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Affiliation(s)
- Shwu-Jen Chang
- Department of Biomedical Engineering, I-Shou University, Kaohsiung, Taiwan
| | - Shyh-Ming Kuo
- Department of Biomedical Engineering, I-Shou University, Kaohsiung, Taiwan
| | - Jhen-Lin You
- Department of Clinical Laboratory, Chung Shan Medical University Hospital, Taichung, Taiwan
| | - Ya-Rong Wu
- Department of Biomedical Engineering, I-Shou University, Kaohsiung, Taiwan
| | - Shu-Ying Chen
- Department of Biomedical Engineering, I-Shou University, Kaohsiung, Taiwan
| | - Ming-Wei Lee
- Department of Clinical Laboratory, Chung Shan Medical University Hospital, Taichung, Taiwan
- School of Medical Laboratory and Biotechnology, Chung Shan Medical University, Taichung, Taiwan
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Wu J, Liu YL, Chang SJ, Chao MM, Tsai SY, Huang DE. Dose point kernel simulation for monoenergetic electrons and radionuclides using Monte Carlo techniques. Radiat Prot Dosimetry 2012; 152:119-124. [PMID: 22923242 DOI: 10.1093/rpd/ncs204] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Monte Carlo (MC) simulation has been commonly used in the dose evaluation of radiation accidents and for medical purposes. The accuracy of simulated results is affected by the particle-tracking algorithm, cross-sectional database, random number generator and statistical error. The differences among MC simulation software packages must be validated. This study simulated the dose point kernel (DPK) and the cellular S-values of monoenergetic electrons ranging from 0.01 to 2 MeV and the radionuclides of (90)Y, (177)Lu and (103 m)Rh, using Fluktuierende Kaskade (FLUKA) and MC N-Particle Transport Code Version 5 (MCNP5). A 6-μm-radius cell model consisting of the cell surface, cytoplasm and cell nucleus was constructed for cellular S-value calculation. The mean absolute percentage errors (MAPEs) of the scaled DPKs, simulated using FLUKA and MCNP5, were 7.92, 9.64, 4.62, 3.71 and 3.84 % for 0.01, 0.1, 0.5, 1 and 2 MeV, respectively. For the three radionuclides, the MAPEs of the scaled DPKs were within 5 %. The maximum deviations of S(N←N), S(N←Cy) and S(N←CS) for the electron energy larger than 10 keV were 6.63, 6.77 and 5.24 %, respectively. The deviations for the self-absorbed S-values and cross-dose S-values of the three radionuclides were within 4 %. On the basis of the results of this study, it was concluded that the simulation results are consistent between FLUKA and MCNP5. However, there is a minor inconsistency for low energy range. The DPK and the cellular S-value should be used as the quality assurance tools before the MC simulation results are adopted as the gold standard.
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Affiliation(s)
- J Wu
- Department of Biomedical Imaging and Radiological Science, China Medical University, 40402 Taichung, Taiwan, ROC
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Sung YH, Yang SW, Tarng YW, Chang SJ, Hsu CJ, Hwang LC. Intraosseous leiomyoma of the distal femur: a case report and review of literatures. Eur J Orthop Surg Traumatol 2012; 22 Suppl 1:161-5. [PMID: 26662770 DOI: 10.1007/s00590-011-0874-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2011] [Accepted: 09/09/2011] [Indexed: 10/17/2022]
Abstract
BACKGROUND Leiomyoma is a benign tumor of smooth-muscle origin. They most commonly derived from the uterus. Besides, they were also usually diagnosed in the gastrointestinal tract, skin, and mucous membranes. However, it rarely occurs in the bone. CASE PRESENTATION The authors reported one case of 56-year-old male with intraosseous leiomyoma of the distal femur. Initially, the patient felt left knee pain for 1 year. Radiographs film disclosed an ill-defined osteolytic lesion with thinning cortex over left distal femoral medial condylar region. Computed tomography (CT) revealed homogenous radiolucent lesion with thinning cortex over the metaphysis of distal femur. Magnetic resonance imaging showed focal marrow replacement by tumor. CT-guide biopsy was performed, and the pathology showed a picture of leiomyoma. Since the definite diagnosis, the lesion was treated with en-bloc resection and endoprosthetic knee joint reconstruction. Satisfied result and disease free were achieved during follow-up. CONCLUSIONS Intraosseous leiomyoma of the extremities is difficult to be diagnosed due to extraordinarily rare. This rare benign tumor should be included in the differential diagnosis of any relatively intraosseous lesion with benign imaging findings. This is the first published case of primary intraosseous leiomyoma of distal femur after literature reviews.
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Affiliation(s)
- Yu-Hsiang Sung
- Department of Orthopedics, Kaohsiung Veterans General Hospital, 386 Ta-Chung 1st Road, Kaohsiung City, Taiwan.
| | - Shan-Wei Yang
- Department of Orthopedics, Kaohsiung Veterans General Hospital, 386 Ta-Chung 1st Road, Kaohsiung City, Taiwan. .,Department of Biomedical Engineering, I-Shou University, Kaohsiung County, Taiwan. .,Department of Electrical Engineering, I-Shou University, Kaohsiung County, Taiwan.
| | - Yih-Wen Tarng
- Department of Orthopedics, Kaohsiung Veterans General Hospital, 386 Ta-Chung 1st Road, Kaohsiung City, Taiwan.
| | - Shwu-Jen Chang
- Department of Biomedical Engineering, I-Shou University, Kaohsiung County, Taiwan.
| | - Chien-Jen Hsu
- Department of Orthopedics, Kaohsiung Veterans General Hospital, 386 Ta-Chung 1st Road, Kaohsiung City, Taiwan.
| | - Lain-Chyr Hwang
- Department of Electrical Engineering, I-Shou University, Kaohsiung County, Taiwan.
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Chen CJ, Liu JT, Chang SJ, Lee MW, Tsai JZ. Development of a portable impedance detection system for monitoring the growth of mouse L929 cells. J Taiwan Inst Chem Eng 2012. [DOI: 10.1016/j.jtice.2012.04.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Hsieh CH, Hung SC, Yang SSD, Chang SJ. Early reinstitution of peritoneal dialysis, without interim hemodialysis, after hand-assisted retroperitoneoscopic radical nephroureterectomy. Perit Dial Int 2012; 32:109-10. [PMID: 22302928 DOI: 10.3747/pdi.2011.00029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Liu JT, Chen CJ, Ikoma T, Yoshioka T, Cross JS, Chang SJ, Tsai JZ, Tanaka J. Surface plasmon resonance biosensor with high anti-fouling ability for the detection of cardiac marker troponin T. Anal Chim Acta 2011; 703:80-6. [PMID: 21843678 DOI: 10.1016/j.aca.2011.07.019] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2011] [Revised: 07/04/2011] [Accepted: 07/13/2011] [Indexed: 11/16/2022]
Abstract
Designing a surface recognition layer with high anti-fouling ability, high affinity, and high specificity is an important issue to produce high sensitivity biosensing transducers. In this study, a self-assembled monolayer (SAM) consisting of a homogeneous mixture of oligo(ethylene glycol) (OEG)-terminated alkanethiolate and mercaptohexadecanoic acid (MHDA) on Au was employed for immobilizing troponin T antibody and applied in detecting cardiac troponin T by using surface plasmon resonance (SPR). The mixed SAM showed no phase segregation and exhibited human serum albumin resistance, particularly with an antibody-immobilized surface. X-ray photoemission spectra revealed that the chemical composition ratio of OEG to the mixed SAM was 69% and the OEG packing density was 82%. The specific binding of troponin T on the designed surface indicated a good linear correlation (R=0.991, P<0.0009) at concentrations lower than 50 μgmL(-1) with the limit of detection of 100 ngmL(-1) using a SPR measuring instrument. It is concluded that the mixed SAM functions as designed since it has high detection capability, high accuracy and reproducibility, as well as shows strong potential to be applied in rapid clinical diagnosis for label-free detection within 2 min.
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Affiliation(s)
- Jen Tsai Liu
- Department of Biomedical Engineering, I-Shou University, Jiaosu Village, Yanchao District, Kaohsiung City, Taiwan, ROC.
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Huang CC, Chang SJ, Kuo CH, Ko CH, Wann CH, Cheng YC, Lin WJ. GaN epitaxial layers prepared on nano-patterned Si(001) substrate. J Nanosci Nanotechnol 2011; 11:1248-1251. [PMID: 21456167 DOI: 10.1166/jnn.2011.3075] [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: 05/30/2023]
Abstract
We report the growth of GaN epitaxial layer on Si(001) substrate with nano-patterns prepared by dry etching facility used in integrated circuit (IC) industry. It was found that the GaN epitaxial layer prepared on nano-patterned Si(001) substrate exhibits both cubic and hexagonal phases. It was also found that threading dislocation observed from GaN prepared on nano-patterned Si(001) substrate was significantly smaller than that prepared on conventional unpatterned Si(111) substrate. Furthermore, it was found that we can reduce the tensile stress in GaN epitaxial layer by about 78% using the nano-patterned Si(001) substrate.
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Affiliation(s)
- C C Huang
- Institute of Microelectronics and Department of Electrical Engineering, Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan 701, Taiwan
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Abstract
The fabrication of a phototransistor via the bridging of two prefabricated electrodes with a laterally grown ZnO nanowire is reported. It was found that the fabricated device is an n-channel enhancement-mode phototransistor with a dark carrier concentration of 6.34 × 10(17) cm(-3) when the gate voltage is biased at 5 V. With an incident-light wavelength of 360 nm and a zero gate bias, it was found that the noise equivalent power and normalized detectivity (D*) of the fabricated ZnO phototransistor were 6.67 × 10(-17) W and 1.27 × 10(13) cm Hz(0.5) W(-1), respectively. It was also found that the current in the device can be modulated efficiently by tuning the wavelength of the excitation source.
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Affiliation(s)
- W Y Weng
- Institute of Microelectronics and Department of Electrical Engineering, Center for Micro/Nano Science and Technology, Advanced Optoelectronic Technology Center, National Cheng Kung University, Tainan 701, Taiwan
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Wang SH, Shen CY, Weng TC, Lin PH, Yang JJ, Chen IF, Kuo SM, Chang SJ, Tu YK, Kao YH, Hung CH. Detection of cartilage oligomeric matrix protein using a quartz crystal microbalance. Sensors (Basel) 2010; 10:11633-43. [PMID: 22163547 PMCID: PMC3231063 DOI: 10.3390/s101211633] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2010] [Revised: 12/10/2010] [Accepted: 12/11/2010] [Indexed: 11/20/2022]
Abstract
Current methods for diagnosing early stage osteoarthritis (OA) based on the magnetic resonance imaging and enzyme-linked immunosorbent assay methods are specific, but require specialized laboratory facilities and highly trained personal to obtain a definitive result. In this work, a user friendly and non-invasive quartz crystal microbalance (QCM) immunosensor method has been developed to detect Cartilage Oligomeric Matrix Protein (COMP) for early stage OA diagnosis. This QCM immunosensor was fabricated to immobilize COMP antibodies utilizing the self-assembled monolayer technique. The surface properties of the immunosensor were characterized by its FTIR and electrochemical impedance spectra (EIS). The feasibility study was based on urine samples obtained from 41 volunteers. Experiments were carried out in a flow system and the reproducibility of the electrodes was evaluated by the impedance measured by EIS. Its potential dynamically monitored the immunoreaction processes and could increase the efficiency and sensitivity of COMP detection in laboratory-cultured preparations and clinical samples. The frequency responses of the QCM immunosensor changed from 6 kHz when testing 50 ng/mL COMP concentration. The linear regression equation of frequency shift and COMP concentration was determined as: y = 0.0872 x + 1.2138 (R2 = 0.9957). The COMP in urine was also determined by both QCM and EIS for comparison. A highly sensitive, user friendly and cost effective analytical method for the early stage OA diagnosis has thus been successfully developed.
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Affiliation(s)
- Shih-Han Wang
- Department of Chemical Engineering, I-Shou University, No. 1, Sec. 1, Syuecheng Rd., Dashu Township, Kaohsiung County 840, Taiwan; E-Mails: (S.-H.W.); (P.-H.L); (J.-J.Y.)
| | - Chi-Yen Shen
- Department of Electrical Engineering, I-Shou University, Taiwan; E-Mails: (C.-Y.S.); (T.-C.W.)
| | - Ting-Chan Weng
- Department of Electrical Engineering, I-Shou University, Taiwan; E-Mails: (C.-Y.S.); (T.-C.W.)
| | - Pin-Hsuan Lin
- Department of Chemical Engineering, I-Shou University, No. 1, Sec. 1, Syuecheng Rd., Dashu Township, Kaohsiung County 840, Taiwan; E-Mails: (S.-H.W.); (P.-H.L); (J.-J.Y.)
| | - Jia-Jyun Yang
- Department of Chemical Engineering, I-Shou University, No. 1, Sec. 1, Syuecheng Rd., Dashu Township, Kaohsiung County 840, Taiwan; E-Mails: (S.-H.W.); (P.-H.L); (J.-J.Y.)
| | - I-Fen Chen
- Department of Biomedical Engineering, I-Shou University, No.8, Yi-Da Road, Jiau-shu Tsuen, Yan-chau Shiang, Kaohsiung County, Taiwan; E-Mails: (I.-F.C.); (S.-M.K); (S.-J.S.)
| | - Shyh-Ming Kuo
- Department of Biomedical Engineering, I-Shou University, No.8, Yi-Da Road, Jiau-shu Tsuen, Yan-chau Shiang, Kaohsiung County, Taiwan; E-Mails: (I.-F.C.); (S.-M.K); (S.-J.S.)
| | - Shwu-Jen Chang
- Department of Biomedical Engineering, I-Shou University, No.8, Yi-Da Road, Jiau-shu Tsuen, Yan-chau Shiang, Kaohsiung County, Taiwan; E-Mails: (I.-F.C.); (S.-M.K); (S.-J.S.)
| | - Yuan-Kun Tu
- Department of Orthopaedic Surgery, E-Da Hospital; No.1, Yi-Da Road, Jiau-shu Tsuen, Yan-chau Shiang, Kaohsiung County, Taiwan; E-Mails: (Y.-K.T.); (Y.-H.K.)
| | - Yu-Hsien Kao
- Department of Orthopaedic Surgery, E-Da Hospital; No.1, Yi-Da Road, Jiau-shu Tsuen, Yan-chau Shiang, Kaohsiung County, Taiwan; E-Mails: (Y.-K.T.); (Y.-H.K.)
| | - Chih-Hsin Hung
- Department of Chemical Engineering, I-Shou University, No. 1, Sec. 1, Syuecheng Rd., Dashu Township, Kaohsiung County 840, Taiwan; E-Mails: (S.-H.W.); (P.-H.L); (J.-J.Y.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +886-7-6577711 ext 3414; Fax: +886-7-6578945
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Su PJ, Chen WL, Li TH, Chou CK, Chen TH, Ho YY, Huang CH, Chang SJ, Huang YY, Lee HS, Dong CY. The discrimination of type I and type II collagen and the label-free imaging of engineered cartilage tissue. Biomaterials 2010; 31:9415-21. [PMID: 20875682 DOI: 10.1016/j.biomaterials.2010.08.055] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2010] [Accepted: 08/24/2010] [Indexed: 11/17/2022]
Abstract
Using excitation polarization-resolved second harmonic generation (SHG) microscopy, we measured SHG intensity as a function of the excitation polarization angle for type I and type II collagens. We determined the second order susceptibility (χ((2))) tensor ratios of type I and II collagens at each pixel, and displayed the results as images. We found that the χ((2)) tensor ratios can be used to distinguish the two types of collagen. In particular, we obtained χ(zzz)/χ(zxx) = 1.40 ± 0.04 and χ(xzx)/χ(zxx) = 0.53 ± 0.10 for type I collagen from rat tail tendon, and χ(zzz)/χ(zxx) = 1.14 ± 0.09 and χ(xzx)/χ(zxx) = 0.29 ± 0.11 for type II collagen from rat trachea cartilage. We also applied this methodology on the label-free imaging of engineered cartilage tissue which produces type I and II collagen simultaneously. By displaying the χ((2)) tensor ratios in the image format, the variation in the χ((2)) tensor ratios can be used as a contrast mechanism for distinguishing type I and II collagens.
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Affiliation(s)
- Ping-Jung Su
- Department of Physics, National Taiwan University, Taipei 106, Taiwan
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Hsiao CH, Chang SJ, Wang SB, Chang SP, Cheng YC, Li TC, Lin WJ, Huang BR. Quaternary ZnCdSeTe nanowires. J Nanosci Nanotechnol 2010; 10:798-802. [PMID: 20352720 DOI: 10.1166/jnn.2010.1813] [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: 05/29/2023]
Abstract
We report the growth of needle-like high density quaternary ZnCdSeTe nanowires on oxidized Si(100) substrate using vapor-liquid-solid mechanism by molecular beam epitaxy with an Au-based nanocatalyst. It was found that average length and average diameter of the nanowires were 1.3 microm and 91 nm, respectively. It was also found that the as-grown ZnCdSeTe nanowires exhibit mixture of cubic zinc-blende and hexagonal wurtzite structures. Energy depersive results indicate that composition ratio of our nanowire should be Zn0.87Cd0.13Se0.98Te0.02, which agrees excellently with the designated composition ratio of Zn0.87Cd0.13Se0.98Te0.02.
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Affiliation(s)
- C H Hsiao
- Institute of Microelectronics and Department of Electrical Engineering, Advanced Optoelectronic Technology Center, National Cheng Kung University, Tainan 701, Taiwan
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Chen KJ, Hung FY, Chang SJ. Structural characteristic, Raman analysis and optical properties of indium-doped ZnO nanoparticles prepared by sol-gel method. J Nanosci Nanotechnol 2009; 9:3325-3329. [PMID: 19453011 DOI: 10.1166/jnn.2009.vc03] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Un-doped and indium (0-9 at.%) doped ZnO nanoparticles were prepared by the sol-gel method. The nanoparticles were heated at 700 degrees C-800 degrees C for 1 hour in air and then analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDS), Raman spectra and photoluminescence (PL). The results were compared to investigate the structural characteristics and physical properties. XRD patterns of the Indium-doped ZnO (IZO) nanoparticles were similar to those of the ZnO nanoparticles. Notably, the crystalline quality of the ZnO nanoparticles had reduced with increasing the concentration of indium doping. The In2O3 phase of IZO and the crystallized structures affected the UV emission band and the green emission band of PL. The Indium-doped (5 at.% - 7 at.%) ZnO nanoparticles possessed higher crystalline quality and better optical properties.
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Affiliation(s)
- K J Chen
- Institute of Microelectronics and Department of Electrical Engineering, Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan 701, Taiwan
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Yoon JH, Yoo SC, Kim WY, Chang SJ, Chang KH, Ryu HS. Role of HPV DNA testing for detection of high-grade cervical lesions in women with atypical squamous cells of undetermined significance: a prospective study in a Korean population. EUR J GYNAECOL ONCOL 2009; 30:271-274. [PMID: 19697619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
OBJECTIVE The purpose of this study was to determine if HPV DNA testing improves the accuracy of detecting possible high-grade cervical lesions in women with atypical squamous cells of undetermined significance (ASC-US). METHODS Cervical cytology and Hybrid Capture II (HCII) assay for HPV DNA detection was performed in 10,526 women from July 2005 to July 2007. Two hundred and sixty women with ASC-US underwent colposcopy-directed biopsy to determine the final histologic diagnosis. They were divided into two groups according to the positivity of the HPV DNA test, and the respective biopsy results were compared. RESULTS Positive HCII was significantly more associated with CIN 2, CIN 3, and invasive cancer than negative HCII (p < 0.001). The odds ratio of positive HPV DNA testing in detecting high-grade lesions was 7.0 (95% CI; 2.8-17.7). CONCLUSION The HPV DNA test is useful for predicting the severity of lesions of the uterine cervix and formulating decisions with regard to treatment plans.
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Affiliation(s)
- J H Yoon
- Department of Obstetrics and Gynecology, Ajou University School of Medicine, Suwon, Korea
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Yoo SC, Kim WY, Yoon JH, Kim HY, Lee EJ, Chang SJ, Chang KH, Ryu HS. Accuracy of preoperative magnetic resonance imaging in assessing lymph node metastasis and myometrial invasion in patients with uterine cancer. EUR J GYNAECOL ONCOL 2009; 30:167-170. [PMID: 19480246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
OBJECTIVES Our aim was to know preoperative magnetic resonance imaging (MRI) can accurately predict lymph node metastasis (LNM) and deep myometrial invasion (DMI, > or = 50%) in patients with uterine cancer. METHODS From January 1997 to December 2006, 99 patients who were diagnosed with uterine cancer and surgically staged at our institution were retrospectively analyzed. Preoperative clinicopathologic characteristics and MRI findings were reviewed and compared with LNM status and DMI observed in the final pathology. RESULTS The sensitivity, specificity, positive predictive value (PPV), and negative predictive values (NPV) for MRI in determination of pelvic LNM were 77.7%, 85.6%, 35.0%, and 94.7%, respectively. MRI failed to detect the presence of paraaortic LNM in all of the three patients with positive paraaortic lymph nodes. The sensitivity, specificity, PPV, and NPV for MRI in determining DMI were 46.6%, 84.5%, 35%, and 89.8%, respectively. CONCLUSION Preoperative evaluation of uterine cancer by MRI does not accurately predict the LNM and DMI.
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Affiliation(s)
- S C Yoo
- Department of Obstetrics and Gynecology, Ajou University School of Medicine, Suwon, Korea
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Young SJ, Ji LW, Chang SJ, Liang SH, Lam KT, Fang TH, Chen KJ, Du XL, Xue QK. Erratum: ZnO-based MIS photodetectors. Sens Actuators A Phys 2008; 141:225-229. [PMID: 35041724 PMCID: PMC8740771 DOI: 10.1016/j.sna.2007.06.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2007] [Revised: 06/04/2007] [Accepted: 06/04/2007] [Indexed: 06/01/2023]
Abstract
[This corrects the article DOI: 10.1016/j.sna.2007.06.006.].
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Affiliation(s)
- S J Young
- Institute of Microelectronics & Department of Electrical Engineering, National Cheng Kung University, Tainan 70101, Taiwan
| | - L W Ji
- Institute of Electro-Optical and Materials Science, National Formosa University, Yunlin 632, Taiwan
| | - S J Chang
- Institute of Microelectronics & Department of Electrical Engineering, National Cheng Kung University, Tainan 70101, Taiwan
- Institute of Nanotechnology and Nanosystems Engineering, Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan 70101, Taiwan
| | - S H Liang
- Institute of Nanotechnology and Nanosystems Engineering, Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan 70101, Taiwan
| | - K T Lam
- Department of Information Communication, Leader University, Tainan 70970, Taiwan
| | - T H Fang
- Institute of Electro-Optical and Materials Science, National Formosa University, Yunlin 632, Taiwan
| | - K J Chen
- Institute of Microelectronics & Department of Electrical Engineering, National Cheng Kung University, Tainan 70101, Taiwan
| | - X L Du
- Institute of Physics, Chinese Academy of Science, Beijing 100080, PR China
| | - Q K Xue
- Institute of Physics, Chinese Academy of Science, Beijing 100080, PR China
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Chang SJ, Mercer VS, Giuliani CA, Morey MC, Sloane C, Williams S. HIP ABDUCTOR EXERCISE AND LATERAL STABILITY IN OLDER ADULTS AT RISK OF FALLS. J Geriatr Phys Ther 2007. [DOI: 10.1519/00139143-200712000-00035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Lee YJ, Yang SK, Byeon JS, Myung SJ, Chang HS, Hong SS, Kim KJ, Lee GH, Jung HY, Hong WS, Kim JH, Min YI, Chang SJ, Yu CS. Analysis of colonoscopic findings in the differential diagnosis between intestinal tuberculosis and Crohn's disease. Endoscopy 2006; 38:592-7. [PMID: 16673312 DOI: 10.1055/s-2006-924996] [Citation(s) in RCA: 149] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
BACKGROUND AND STUDY AIMS Intestinal tuberculosis and Crohn's disease are chronic inflammatory bowel disorders that are difficult to differentiate from one another. This study aimed to evaluate the diagnostic value of various colonoscopic findings in the differential diagnosis between intestinal tuberculosis and Crohn's disease. PATIENTS AND METHODS Colonoscopic findings on initial work-up were prospectively recorded in patients with an initial diagnosis of either intestinal tuberculosis or Crohn's disease. These findings were analyzed after a final diagnosis of intestinal tuberculosis (n = 44) or Crohn's disease (n = 44) had been made after follow-up. RESULTS Four parameters (anorectal lesions, longitudinal ulcers, aphthous ulcers, and cobblestone appearance) were significantly more common in patients with Crohn's disease than in patients with intestinal tuberculosis. Four other parameters (involvement of fewer than four segments, a patulous ileocecal valve, transverse ulcers, and scars or pseudopolyps) were observed more frequently in patients with intestinal tuberculosis than in patients with Crohn's disease. We hypothesized that a diagnosis of Crohn's disease could be made when the number of parameters characteristic of Crohn's disease was higher than the number of parameters characteristic of intestinal tuberculosis, and vice versa. Making these assumptions, we calculated that the diagnosis of either intestinal tuberculosis or Crohn's disease would have been made made correctly in 77 of our 88 patients (87.5 %), incorrectly in seven patients (8.0 %), and would not have been made in four patients (4.5 %). CONCLUSIONS A systematic analysis of colonoscopic findings is very useful in the differential diagnosis between intestinal tuberculosis and Crohn's disease.
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Affiliation(s)
- Y J Lee
- Department of Internal Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea
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Chang SJ, Sims J, Murtagh FR, McCaffrey JC, Messina JL. Proliferating trichilemmal cysts of the scalp on CT. AJNR Am J Neuroradiol 2006; 27:712-4. [PMID: 16552022 PMCID: PMC7976987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Proliferating trichilemmal cysts, also known as pilar tumors, are slow-growing lobulated masses most commonly found on the scalp of elderly women. We present the case of a 69-year-old woman with a 25-year history of multiple enlarging scalp masses. The patient was evaluated for surgical consultation after the dominant mass presented with malignant degeneration. A CT of the head revealed multiple large, subcutaneous, cystic masses with calcifications.
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Affiliation(s)
- S J Chang
- Department of Radiology, University of South Florida College of Medicine, Tampa, Fla, USA
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Chang SJ, Niu GCC, Kuo SM, Ho CC, Bair MS. Preparation of nano-sized particles from collagen II by a high-voltage electrostatic field system. ACTA ACUST UNITED AC 2006; 153:1-6. [PMID: 16480319 DOI: 10.1049/ip-nbt:20050037] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The pilot study describes a novel method for preparing nano-sized particles from collagen II using a high-voltage electrostatic field system. Observations from transmission electron microscopy showed that, in one of the cases, the nano-sized collagen II particles exhibited good sphericity, and the particles were in the range of 23.3+/-1.7 nm in diameter at the experimental setting of 3 kV cm(-1), for a 3 h treatment period and at 25 degrees C (with a collagen concentration of 0.2 mg ml(-1)). When the treatment temperature increased to 30 degrees C, the collagen II began to lose the tendency to form individually separated spherically shaped nano-particles. Moreover, a fibrous structure of collagen II was formed instead of a nano-particle shape at the temperature of 37 degrees C. This result is probably contributed to by an entropy-driven process that is termed fibrillogenesis, a larger force causing the collagen molecules to self-assemble and then form collagen fibrils. It is interesting to note that this is practically the first attempt to produce nano-particles directly from collagen II solution under the treatment of a high-voltage electrostatic field, together with a set of working parameters for the collagen concentration and low-temperature setting.
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Affiliation(s)
- S J Chang
- I-SHOU University, Department of Biomedical Engineering, Kaohsiung County, Taiwan
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Lin YF, Chang SJ, Yang JR, Lee YP, Hsu AL. Effects of supplemental vitamin E during the mature period on the reproduction performance of Taiwan Native Chicken cockerels. Br Poult Sci 2005; 46:366-73. [PMID: 16050192 DOI: 10.1080/00071660500098186] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
One-day-old Taiwan native male chicks were fed with maize-soybean rearing diets without supplemental vitamin E to 23 weeks of age. From 23 to 52 weeks of age, the cockerels (n = 90) were assigned at random to 5 dietary treatments and fed with maize-soybean diets supplemented with 0, 20, 40, 80 and 160 mg/kg of vitamin E (dl-alpha-tocopherol acetate). Pullets (225) of the same age were fed with standard diets throughout. They were artificially inseminated with one dose of 0.04 ml/bird intact and 5-fold diluted pooled semen at 31 to 43 weeks of age and at 49 weeks of age, respectively. The criteria evaluated included: semen quality, fertility and maximum and effective duration of fertility, blood characteristics, body and testes weight. Supplemental vitamin E did not affect cockerels' effective duration of fertility and percentage of fertility. However, when pullets were inseminated with diluted semen, supplementing 160 mg/kg vitamin E increased the maximum duration of fertility at 49 weeks of age. Cockerels receiving 40 to 160mg/kg supplements had higher sperm viability and motility after 39 weeks of age and those fed 80 mg/kg had higher sperm concentration at 39 weeks of age. Cockerels receiving supplements of more than 40 mg/kg vitamin E had higher body weight gain. Plasma cholesterol and testosterone were not affected by supplemental vitamin E. However, plasma luteinising hormone (LH) concentration was lower in cockerels fed 160 mg/kg. Lack of supplemental vitamin E over 39 weeks was associated with lower semen quality but did not reduce the proportion of fertile eggs laid by inseminated hens, perhaps because the insemination dose compensated for low sperm quality. We found that the maximum duration of fertility might be improved by supplementing 160 mg/kg vitamin E at 49 weeks of age.
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Affiliation(s)
- Y F Lin
- The Livestock Research Institute, Council of Agriculture, Tainan, Taiwan
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Ko YC, Huang MC, Wang TN, Chang SJ, Tsai LY, Tu HP. Prevalence and risk factors associated with dyslipidaemia in children and adolescents among ethnic groups in Taiwan. Public Health 2005; 119:489-97. [PMID: 15826890 DOI: 10.1016/j.puhe.2004.08.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2003] [Revised: 07/27/2004] [Accepted: 08/16/2004] [Indexed: 10/25/2022]
Abstract
BACKGROUND The mortality rates of cerebral and cardiovascular diseases are higher for aborigines than non-aborigines in Taiwan. Hypertriglyceridaemia and hypercholestolaemia are risk factors for cardiovascular diseases. OBJECTIVES To investigate the prevalence of dyslipidaemia and its associated risk factors in aborigine (Atayal, Paiwan and Bunun tribes) and non-aborigine (Fukein and Hakka Chinese) children and adolescents in Taiwan. STUDY DESIGN This was a cross-sectional study. METHODS In total, 718 males and 721 females, below 20 years of age, were recruited. Our study defined dyslipidaemia as serum triglyceride and cholesterol levels greater than 200 and 240 mg/dl, respectively. RESULTS The serum triglyceride level and the prevalence of hypertriglyceridaemia were similar in both aborigines and non-aborigines and both sexes, but the Bunun and Paiwan tribes had the highest prevalence of hypertriglyceridaemia in males (11.8-29.4%) and females (10.9-22.8%) compared with other aboriginal tribes (5.1-10.8% for males and 7.8-9.2% for females). Serum cholesterol concentrations and the prevalence of hypercholesterolaemia were lower in the aborigines than non-aborigines for both sexes (P<0.05), with the Atayal tribe having the lowest prevalence in males (1.1%) and females (2.1%) compared with other aboriginal tribes (2.4-4.5% for males and 5.7-8.0% for females). Using multivariate-adjusted logistic regression modelling, hypertriglyceridaemia was significantly associated with the Bunun tribe (odds ratio (OR)=3.2, 95% confidence intervals (CI) 1.6-6.1), hyperuricaemia (OR=1.8, 95% CI 1.2-2.6), hypercholesterolaemia (OR=3.3, 95% CI 1.7-6.4) and alcohol use (OR=2.8, 95% CI 1.2-6.6). Hypercholesterolaemia, after controlling for age and sex, was significantly associated with the Atayal tribe (OR=0.2, 95% CI 0.1-0.5), hypertriglyceridaemia (OR=3.5, 95% CI 1.8-6.7) and hyperuricaemia (OR=3.2, 95% CI=1.7-6.0). CONCLUSIONS For the young people of Taiwan, hypertriglyceridaemia is associated with hyperuricaemia, hypercholesterolaemia and alcohol use, and hypercholesterolaemia is associated with hypertriglyceridaemia and hyperuricaemia. Compared with non-aborigines, the young aborigines of some tribes have a higher prevalence of hypertriglyceridaemia and a lower serum cholesterol level.
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Affiliation(s)
- Y C Ko
- Division of Environmental Health and Occupational Medicine, National Health Research Institutes, 100 Shih-Chuan 1st Road, Kaohsiung 807, Taiwan, ROC.
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Lin LC, Chang SJ, Kuo SM, Chen SF, Kuo CH. Evaluation of chitosan/beta-tricalcium phosphate microspheres as a constituent to PMMA cement. J Mater Sci Mater Med 2005; 16:567-74. [PMID: 15928873 DOI: 10.1007/s10856-005-0533-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2004] [Accepted: 10/15/2004] [Indexed: 05/02/2023]
Abstract
Two methods, a traditional emulsion technique and a high voltage electrostatically modified encapsulation system, were used to fabricate degradable chitosan/beta -tricalcium phosphate (beta-TCP) microspheres. The two distinct kinds of microspheres both exhibited good sphericity and the beta-TCP was trapped well inside the chitosan gel. The microspheres prepared by high voltage electrostatic system exhibited a rougher outer surface and narrower size distribution. These microspheres were then used as an added constituent to commercially available PMMA bone cement. Four modified cement composites that were prepared with different composition ratios of the two kinds of chitosan/beta-TCP microspheres that were made from emulsion technique (C1P1 and C2P1) and from a process by a high voltage electrostatic system (EC1P1 and EC2P1) were compared with the PMMA cement (Pure P). The characteristics of these materials indicate that with the addition of chitosan/beta-TCP microspheres as a constituent into the PMMA cement significantly decreases the curing peak temperature. Furthermore, the setting time increases from 3.5 min to 9 min, as compared to the PMMA cement. These changes could be beneficial for the handling of the bone cement paste and causing less damage to the surrounding tissues. Understandably, the presence of chitosan/beta-TCP microspheres in the prepared composites reduced the ultimate compressive strength and bending strength. From the degradation test and SEM observations, the modified chitosan/beta -TCP/PMMA composites could be degraded gradually and create rougher surfaces that would be beneficial to cell adherence and growth.
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Affiliation(s)
- Li-Chun Lin
- Orthopedic Department, Veteran General Hospital, Kaohsiung, Taiwan
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Abstract
1. One-day-old Taiwan Native Breeder female chicks were fed on maize/soybean growing diets without supplemental vitamin E from hatch to 17 weeks of age. After 17 weeks the birds (n = 300) were randomly assigned to 5 dietary treatments and fed on maize/soybean laying diets supplemented with 0, 40, 80, 120 and 160 mg/kg of vitamin E (dl-alpha-tocopherol acetate), respectively, until 46 weeks of age. The variates measured included: age at first egg, feed consumption (FC), feed efficiency (FE), egg production (EP), egg weight (EW), egg specific gravity (ESG), eggshell strength (ESS), fertility and hatchability. 2. The addition of 120mg/kg of vitamin E lowered the first EW (P<0.05); however, there was no significant difference in the age or body weight (BW) of pullets at first egg or mortality rate to 46 weeks of age among the treatments. FE and egg mass were improved (P<0.05) in pullets fed 80 mg/kg of supplemental vitamin E. A significant increase in EP was observed after peak EP in pullets given 80 mg/kg of supplemental vitamin E. However, this favourable effect decreased as supplemental vitamin E exceeded 80 mg/kg. 3. From 17 to 46 weeks of age, egg quality (ESG and ESS) decreased with age. However, there was no correlation between age and fertility or hatchability during the experimental period, suggesting that egg quality is more age-sensitive than reproductive performance for breeder pullets. 4. Compared with the control, fertility and hatchability of all eggs set for the treatment with 80 mg/kg supplemental vitamin E increased by 7.7 and 13.4%, respectively. There was no difference in the hatchability of fertile eggs. 5. These results suggest that using supplemental vitamin E during the laying period can improve the reproductive performance of breeder pullets. The addition of 80 mg/kg of vitamin E obtained the best performance in EP, egg mass, FE (feed/egg), hatchability and fertility.
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Affiliation(s)
- Y F Lin
- Livestock Research Institute, Council of Agriculture, Tainan, Taiwan
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Abstract
OBJECTIVE To reveal the factors associated with renal dysfunction among gout patients in Taiwan aborigines. METHODS Social demographic data, alcohol consumption data, anthropometric measurements, blood samples, and 24-h urine samples were collected from 128 aboriginals (101 men, 27 women) suffering from gout. RESULTS The men displayed higher mean creatinine clearance (Ccr) values than women. Twenty-two post-menopausal women had significantly lower Ccr values compared to the five pre-menopausal women [probability (p)<0.001]. The males displayed higher 24-h urinary creatinine value than females (8.60+/-5.39 versus 5.58+/-2.14 mmol/L; p<0.05), and showed a significantly higher positive relationship between 24-h urinary creatinine and uric acid excretion [correlation coefficient (r)=0.7304; p<0.001], whereas the females did not (r=0.1144; p=0.5691). Overall, those who were older members of the Tsou tribe, or had excreted less uric acid from urine in 24 h tended to suffer renal dysfunction. CONCLUSIONS Gout patients displayed diversity in renal function. An exogenous source of creatinine in men was more likely than in women.
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Affiliation(s)
- S J Chang
- Department of Public Health, School of Medicine, Kaohsiung Medical University, Taiwan
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Kim JS, Jang YT, Kim JD, Park TH, Park JM, Kilgore PE, Kennedy WA, Park E, Nyambat B, Kim DR, Hwang PH, Kim SJ, Eun SH, Lee HS, Cho JH, Kim YS, Chang SJ, Huang HF, Clemens JD, Ward JI. Incidence of Haemophilus influenzae type b and other invasive diseases in South Korean children. Vaccine 2004; 22:3952-62. [PMID: 15364444 DOI: 10.1016/j.vaccine.2004.04.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2003] [Accepted: 04/07/2004] [Indexed: 10/26/2022]
Abstract
To determine incidence of invasive Haemophilus influenzae type b (Hib) disease in a defined population of Jeonbuk Province, Korea, children <5 years were evaluated in prospective, population-based surveillance of invasive bacterial diseases using standardized methods for patient referral, clinical evaluation and laboratory testing (optimized culture, latex agglutination, polymerase chain reaction). Vaccine utilization was assessed with vaccination histories of patients in surveillance, monthly data on Hib vaccine distribution and a coverage survey of clinic patients in study population. From September 1999 to December 2001, 2176 children were evaluated for possible meningitis, 1541 had no cerebrospinal fluid (CSF) findings of meningitis, 605 had CSF abnormalities (suspected bacterial meningitis) but no pathogen identified; six patients had probable Hib meningitis and eight had confirmed Hib meningitis. The annual suspected bacterial meningitis incidence was 258.4/100,000 <5 years and the probable/confirmed Hib meningitis incidence was 6.0/100,000 <5 years. Pneumococcal meningitis incidence was 2.1/100,000 <5 years and Group B streptococcal meningitis incidence was 0.17/1000 live births. A total of 69,589 Hib vaccine doses were distributed during the study. Hib vaccine coverage was negligible initially but increased to 16% (complete Hib immunization) and 27% (partial immunization) in final months of study. Suspected bacterial meningitis incidence was high but proven invasive Hib meningitis incidence was low. Hib was leading cause of bacterial meningitis yet bacterial pathogens were identified in only 4% of abnormal CSF. These findings may reflect truly low incidence, presumptive antibiotic treatment, partial Hib immunization, or incomplete clinical evaluations. Given the apparent Hib meningitis burden in Jeonbuk Province, additional studies to describe other invasive Hib syndromes, Hib-associated mortality and disability, and economic impact of Hib disease will be useful to guide public health decisions regarding routine Hib vaccine introduction.
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Affiliation(s)
- J S Kim
- Department of Pediatrics, Jeonbuk National University Hospital, Jeonju, Jeonbuk Province, Republic of Korea
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Chuang HY, Ho CK, Lee TY, Ho KY, Wu TNF, Chang SJ, Chen CJ, Hsu LC. A CASE-CONTROL STUDY ON CHEMICAL EXPOSURE AND HEARING LOSS AT WORK PLACE. Epidemiology 2003. [DOI: 10.1097/00001648-200309001-00228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Chang SJ, Chen TC, Wang TY, Hsu CY, Chen HS, Yang YC. Successful treatment with weekly paclitaxel in a patient with recurrent endometrial cancer. A case report. EUR J GYNAECOL ONCOL 2003; 24:377-8. [PMID: 14584648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
The best treatment for recurrent endometrial cancer is still uncertain, although weekly paclitaxel has shown some promise in the management of this disease. In this report we present a patient with recurrent endometrial cancer treated with weekly paclitaxel. Serial power Doppler angiography was used to assess the effects of therapy. The response was good, suggesting that recurrent endometrial cancer may be successfully treated with weekly paclitaxel and effectively monitored with power Doppler angiography.
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Affiliation(s)
- S J Chang
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan
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Yeh BI, Han DP, Sohn JH, Yoon JH, Lee HA, Chang SJ, Kong ID, Kim HW, Choi JW. Mutation of Ha-ras Oncogene in Rat Salivary Gland Tumors Induced by DMBA. Cancer Res Treat 2001; 33:495-9. [PMID: 26680829 DOI: 10.4143/crt.2001.33.6.495] [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] [Indexed: 11/21/2022] Open
Abstract
PURPOSE The incidence of salivary gland tumor is approximately 2% among all head and neck tumors, of which malignant cases account for only about 5%. Much research has been performed in order to clarify the mechanism of oncogene activation, however salivary gland tumors remain understudied. We performed this study in order to characterize the ras gene in these tumors. MATERIALS AND METHODS We treated white rats with 7, 12-dimethylbenz[a]anthracene (DMBA) and confirmed the occurrence of salivary gland tumors after ten to thirty weeks. Isolated genomic DNAs from tumor tissues were added to NIH 3T3 cells. In order to detect Ha-ras mutations, we performed a two-step PCR-RFLP and 7analyzed the mutated sequences. RESULTS We induced salivary gland tumors by DMBA treatment in white rats. Isolated DNAs from the tumor tissues transformed the NIH 3T3 cells. Point mutations were observed in codons 12 and 61 of the Ha-ras oncogene. The total frequency of point mutations was 13.9% in DMBA-induced salivary gland tumors in rats. CONCLUSION Our results demonstrate that a variety of cancers ras oncogene mutations were also found in salivary gland tumors. We confirmed that a point mutation of the Ha-ras oncogene in a DMBA-induced salivary gland tumor occurs at a frequency of 13.9%.
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Abstract
To formulate a transdermal drug delivery system of captopril, monolithic adhesive matrix type patches containing 20% captopril, different pressure-sensitive adhesives, and various permeation enhancers were prepared using a labcoater. The effects of the adhesives and permeation enhancers on skin permeation of captopril from the prepared patches were evaluated using Franz diffusion cells fitted with excised rat skins. The permeation rate of the drug through the excised skin was dependent on the type of polyacrylate copolymers studied. Fatty alcohols resulted in a pronounced enhancing effect on the skin permeation of captopril, while dimethyl sulfoxide, N-methyl-2-pyrrolidone, oleic acid, Transcutol, and polysorbate 20 showed no significant enhancing effect. The permeation-enhancing effect of the fatty alcohols reached the maximum at the level of 100%. Based on these results, a captopril patch may be developed with further optimization.
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Affiliation(s)
- E S Park
- College of Pharmacy, Sungkyunkwan University, Suwon, Korea
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46
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Chen CP, Chang HK, Sheu CY, Chen BF, Chang SJ, Wang W. Sonographic detection of previously unsuspected vesical endometriosis in a woman with dysmenorrhea. Ultrasound Obstet Gynecol 2001; 18:183-184. [PMID: 11547764 DOI: 10.1046/j.1469-0705.2001.00463-2.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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47
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Abstract
Two phenanthraquinones were isolated from the stems of Dendrobium moniliforme. They were identified by interpretation of spectral data as 2,6-dimethoxy-1,4,5,8-phenanthradiquinone and 5-hydroxy-3,7-dimethoxy-1,4-phenanthraquinone, named moniliformin (1) and denbinobin (2), respectively. This is the first report of compound 1, which possesses a novel 1,4,5,8-diquinone moiety in the phenanthraquinone skeleton. Compound 2 showed potent antiinflammatory effects in vitro.
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Affiliation(s)
- T H Lin
- Institute of Chinese Pharmaceutical Sciences, China Medical College, 91, Hsueh-Shih Road, Taichung 404, Taiwan, Republic of China
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Zangwill KM, Droge J, Mendelman P, Marcy SM, Partridge S, Chiu CY, Jing J, Chang SJ, Cho I, Ward JI. Prospective, randomized, placebo-controlled evaluation of the safety and immunogenicity of three lots of intranasal trivalent influenza vaccine among young children. Pediatr Infect Dis J 2001; 20:740-6. [PMID: 11734734 DOI: 10.1097/00006454-200108000-00005] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Trivalent formulations of an experimental, cold-adapted, intranasal influenza (CAIV) vaccine have been shown to be safe, immunogenic and efficacious in young children. METHODS We evaluated the safety and immunogenicity of three consistency lots of CAIV in children 12 to 36 months of age randomized to one of five groups: Groups 1, 2 and 3 received separate lots containing A/Shenzhen/227/95 (H1N1), A/Wuhan/359/95(H3N2) and B/Harbin/7/94-like viral strains. Group 4 received an earlier efficacy trial lot which included a different H1N1 strain (A/Texas/36/91-like); and Group 5 received placebo. We performed strain-specific serum hemagglutination inhibition antibody levels against type A (H3N2 or H1N1) or type B as appropriate. RESULTS Overall 474 children received 2 doses, 2 months apart. Each lot was well-tolerated, and there were no significant group differences between consistency lots in the proportion of children with fever and local or systemic reactions after vaccination. The 3 consistency lots were not statistically different with regard to immunogenicity as measured by seroconversion or absolute geometric mean titer. Immune responses were more robust among initially seronegative children and for H3N2 and B strains than for H1N1 strains. After 2 doses of vaccine 97, 84 and 62% had hemagglutination inhibition titers > or = 1/32 against A/H3N2, B and H1N1 strains, respectively. For A/H3N2 only, immune responses after 1 dose of vaccine are similar to those seen after 2 doses. CONCLUSIONS Each consistency lot of CAIV is as or more immunogenic than a lot used in a large efficacy trial.
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Affiliation(s)
- K M Zangwill
- UCLA Center for Vaccine Research, Harbor-UCLA Medical Center, Torrance, CA, USA
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Jeon BH, Chang SJ, Kim JW, Hong YM, Yoon SY, Choe IS. Effect of high blood flow on the expression of endothelial constitutive nitric oxide synthase in rats with femoral arteriovenous shunts. Endothelium 2001; 7:243-52. [PMID: 11201522 DOI: 10.3109/10623320009072211] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The effect of high blood flow on the expression of endothelial nitric oxide synthase has been investigated in the femoral arteriovenous shunt (AVS) rats created by inserting U-shaped polyurethane tubes in the left femoral arteries and veins. Three days after inserting the femoral AVS, the mean aortic blood flow rate in the abdominal aorta of the AVS rats was about 2.0 times higher than that in the control rats (110.0 +/- 8.4 ml/min vs 52.7 +/- 2.7 ml/min, p < 0.001). The competitive reverse transcriptase-polymerase chain reaction (RT-PCR) data revealed that the mRNA expression level of the endothelial constitutive nitric oxide synthase (ecNOS) was increased in the aortas of the femoral AVS rats compared to that in the control rats. Western blot analysis using a monoclonal antibody against ecNOS revealed that the ecNOS protein levels were markedly increased in the aortas of femoral AVS rats, but ecNOS protein levels in aortas without endothelium were not significantly increased. Inducible nitric oxide synthase (iNOS) protein was not expressed in the aortic tissues with and without endothelium in the control rats. This iNOS expression was not increased by the high blood flow in the femoral AVS rats. These findings suggest that high blood flow could up-regulate the expression levels of ecNOS mRNA and proteins in femoral arteriovenous shunt rats.
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Affiliation(s)
- B H Jeon
- Department of Physiology, College of Medicine, Chungnam National University, Jung-gu, Taejon, Korea.
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50
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Abstract
1-(4-Methylpiperazinyl)-3-phenylisoquinoline hydrochloride (CWJ-a-5) is a newly developed from benzo[c]phenanthridine alkaloids and derivative and has exhibited potent antitumor activities, in vitro and in vivo. The pharmacokinetics of this novel antitumor 3-arylisoquinoline derivative was studied after intravenous (i.v.), oral (p.o.) and hepatoportal (p.v.) administration in rats. A simple high performance liquid chromatographic method was developed to determine the concentrations of CWJ-a-5 in plasma, bile and urine. Plasma concentration profiles of CWJ-a-5 were best fitted by the two-compartment model after i.v. administration and showed a linear pharmacokinetic behavior up to 20 mg/kg doses. The half-life of CWJ-a-5 in the post-distributive phase (t1/2beta), total-body plasma clearance (CLt), and volume of distribution at steady-state (Vdss) were 86.9 min, 5.72 l/h per kilogram and 9.79 l/kg, respectively, after i.v. administration of 10 mg/kg. Biliary and urinary excretion of CWJ-a-5 was < 1% after i.v. injection of 10 mg/kg. The bioavailability of CWJ-a-5 after p.o. and p.v. administration (50 and 10 mg/kg, respectively) was 52.9 and 72.2%, respectively. Gastrointestinal bioavailability was calculated to be 73.3%. The apparent partition coefficient (log P) of CWJ-a-5 between n-octanol and water was 2.64. Plasma protein binding of CWJ-a-5 measured by the ultrafiltration method was > 95%.
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Affiliation(s)
- K E Kim
- College of Pharmacy, Pusan National University, 609735, Pusan, South Korea
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