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Chen TA, Lu PY, Lin PY, Chi CW, Cheng HY, Lai YJ, Wang F, Chiang YC. Effects of ceramic thickness, ceramic translucency, and light transmission on light-cured bulk-fill resin composites as luting cement of lithium disilicate based-ceramics. J Prosthodont Res 2024; 68:255-263. [PMID: 37197947 DOI: 10.2186/jpr.jpr_d_22_00304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
PURPOSE To assess the effects of ceramic thickness, ceramic translucency, and light transmission on restorative composites used as luting cement for lithium disilicate-based ceramics. METHODS Four luting types of cement were tested (n=8); a dual-cured resin cement (Multilink N), a light-cured conventional flowable composite (Tetric N-Flow), and two light-cured bulk-fill flowable composites (Tetric N-Flow Bulk Fill and X-tra base). The 20 s- or 40 s-light (1000 mW/cm2) was transmitted through 1- or 2-mm-thick high- or low-translucency (HT- or LT-) ceramic discs (IPS e.Max press) to reach the 1-mm-thick luting cement. Light transmitted to cement without ceramic served as a control. Vickers hardness number (VHN), flexural strength (FS), fractography, and degree of conversion (DC) were evaluated. One-way and multi-way analysis of variance was conducted to determine the effects of factors on VHN and FS. RESULTS Ceramic thickness, light transmission time, and cement type significantly affected the VHN of the luting cement (P < .000). Only Multilink N (LT- and HT-1mm) and Tetric N-Flow (HT-1mm) reached 90% VHN of corresponding control by 20 s-light transmissions, but Tetric N-Flow exhibited lowest VHN and approximately 1/3-1/2 VHN of Multilink N (P < 0.05). X-tra base expressed superior physicochemical properties to Tetric N-Flow Bulk Fill (P < 0.05) and reached >90% VHN of control in all conditions with 40 s-light transmissions except for LT-2 mm. DC, FS, and fractography supported these findings. CONCLUSIONS The light-cured bulk-fill composite served as a luting cement for lithium-disilicate-based ceramics in a product-dependent manner. Light transmission time is crucial to ensure sufficient luting cement polymerization.
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Affiliation(s)
- Ting-An Chen
- Division of Restorative and Aesthetic Dentistry, Dental Department, National Taiwan University Hospital, Taipei, Taiwan
| | - Pei-Ying Lu
- Division of Restorative and Aesthetic Dentistry, Dental Department, National Taiwan University Hospital, Taipei, Taiwan
- Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University and National University Hospital, Taipei, Taiwan
| | - Po-Yen Lin
- Department of Dentistry, School of Dentistry, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Chih-Wen Chi
- Department of Dentistry, National Taiwan University Hospital Hsin-Chu Branch, Hsinchu City, Taiwan
| | - Hon Yin Cheng
- Division of Restorative and Aesthetic Dentistry, Dental Department, National Taiwan University Hospital, Taipei, Taiwan
| | - Yu-Jung Lai
- Division of Restorative and Aesthetic Dentistry, Dental Department, National Taiwan University Hospital, Taipei, Taiwan
- Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University and National University Hospital, Taipei, Taiwan
| | - Fajen Wang
- Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University and National University Hospital, Taipei, Taiwan
| | - Yu-Chih Chiang
- Division of Restorative and Aesthetic Dentistry, Dental Department, National Taiwan University Hospital, Taipei, Taiwan
- Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University and National University Hospital, Taipei, Taiwan
- Molecular Imaging Center, National Taiwan University, Taipei, Taiwan
- School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
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Chang HM, Ko HH, Chi CW, Deng YT, Lin IP, Chen SH. Prosthetic-Driven Autotransplantation with the Assistance of Medical Image-Processing Software and a Real-Time Navigation System: A Case Report. INT J PERIODONT REST 2024; 44:197-203. [PMID: 37471157 DOI: 10.11607/prd.6498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/22/2023]
Abstract
Autotransplantation has been proven as a viable method of reconstructing missing teeth. While preparing the recipient site, the bone reduction location depends largely on the surgeon's experience. Inappropriate overpreparation can cause biologic and esthetic complications, such as buccal or lingual bone resorption. This paper provides an innovative method to aid clinicians in precisely preparing a recipient site with the assistance of medical image-processing software and a real-time navigation system. This case report presents the autotransplantation of a mandibular molar using this technique with good short-term (6 months) clinical outcomes, including radiographic bone fill, normal probing pocket depth, physiologic tooth mobility, acceptable gingival level, and satisfactory restoration.
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Chen CH, Lee KH, Wei CC, Lin PY, Liao WC, Chi CW, Fok ASL, Chiang YC. [Effect of a 10-Methacryloyloxydecyl Dihydrogen Phosphate- treated Bioceramic Sealer on the Bond Strength of an Endodontic Fiber Post: Multilayer Composite Disk Models and Ultra-highspeed Imaging Analysis]. J Adhes Dent 2024; 26:65-78. [PMID: 38379400 DOI: 10.3290/j.jad.b4997329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/22/2024]
Abstract
PURPOSE Multiple materials are found in the root canal after fiber-post cementation. The layer of a bioceramic-based (BC) sealer may affect the bond strength (σBS) of the fiber post in the root canal. The purpose of this study was to employ multilayer compos-ite-disk models in diametral compression to investigate whether the bond strength between a fiber post and root dentin can be in-creased by the application of a primer on the BC sealer. MATERIALS AND METHODS The multilayers of materials in the root canal required 3D finite-element (FE) stress analyses (FEA) to pro-vide precise σBS values. First, BC sealer was characterized using x-ray powder diffraction (XRD) to determine when the sealer com-pletely set and the types of crystals formed to select which primer to apply to the sealer. We selected a 10-methacryloyloxydecyl dihydrogen phosphate (10-MDP)-based primer to treat the BC sealer before post cementation. Ultra-highspeed (UHS) imaging was utilized to analyze the crack initiation interface. The obtained failure force was used in FE analysis to calculate σBS. RESULTS UHS imaging validated the fracture interface at the post-dentin junction as FEA simulations predicted. σBS values of the fiber posts placed with various material combinations in the root canal were 21.1 ± 3.4 (only cement/ post), 22.2 ± 3.4 (BC sealer/cement/post) and 28.6 ± 4.3 MPa (10-MDP primer treated BC sealer/cement/post). The 10-MDP-treated BC sealer exhibited the highest σBS (p < 0.05). CONCLUSION The multilayer composite disk model proved reliable with diametral compression testing. The presence of BC sealer in the root canal does not reduce σBS of the fiber post. Conditioning the BC sealer layer with 10-MDP primer before fiber-post cemen-tation increases σBS.
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Chen CL, Chi CW, Lee CY, Tsai YL, Kasimayan U, K P O M, Lin HP, Chiang YC. Effects of surface treatments of bioactive tricalcium silicate-based restorative material on the bond strength to resin composite. Dent Mater 2024; 40:102-110. [PMID: 37919112 DOI: 10.1016/j.dental.2023.10.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2023] [Revised: 10/19/2023] [Accepted: 10/25/2023] [Indexed: 11/04/2023]
Abstract
OBJECTIVES This study aimed to enhance the bond strength between Biodentine™ (BD), a bioactive tricalcium silicate (C3S) based material, and resin composite through various surface treatments. METHODOLOGY BD samples were immersed in either double distilled water or Hank's Balanced Salt Solution and analyzed using X-ray Diffraction (XRD). Shear bond strength (SBS) evaluations of BD were performed using Prime & Bond™ NT (PNT), Single Bond Universal (SBU), Xeno V (Xeno), and glass ionomer cement (GIC) following various etching durations (0 s/ 15 s/ 30 s/ 60 s with 37.5% phosphoric acid). Two primers, RelyX™ Ceramic Primer (RCP) and Monobond ™ Plus (MBP), were chosen to prime BD for SBS enhancement. Fractography and bonding interfaces were examined with energy dispersive X-ray spectroscopy (EDS)/ scanning electron microscopy (SEM) and Fourier-transform infrared spectroscopy (FTIR). RESULTS XRD confirmed BD's main compositions as C3S, Ca(OH)2, CaCO3 and ZrO2 after 14 days crystal maturation. Etched BD did not improve SBS. GIC exhibited the lowest SBS (p < 0.05) among all adhesives, regardless of the etching mode (all < 1 MPa). The highest SBS (17.5 ± 3.6 MPa, p < 0.05) was achieved when BD primed with MBP followed by SBU application. FTIR and EDS showed γ-MPTS and10-MDP within the MBP primer interacted with C3S and ZrO2 of BD, achieving enhanced SBS. Most specimens exhibited mixed or cohesive failure modes. Significance BD's subpar mechanical properties and texture may contribute to its poor adhesion to resin composite. Pretreating BD with MBP primer, followed by SBU adhesive is recommended for improving bond strength.
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Affiliation(s)
- Che-Lun Chen
- School of Dentistry and Graduate Institute of Clinical Dentistry, National Taiwan University and National Taiwan University Hospital, Taipei, Taiwan; Division of Restorative and Aesthetic Dentistry, Dental Department, National Taiwan University Hospital, No. 1, Chang-Te Street, Taipei 10016, Taiwan
| | - Chih-Wen Chi
- Department of Dentistry, National Taiwan University Hospital, Hsin-Chu Branch, No. 25, Ln. 442, Section 1, Jingguo Rd., North Dist., Hsinchu City 300195, Taiwan
| | - Chen-Yi Lee
- Division of Restorative and Aesthetic Dentistry, Dental Department, National Taiwan University Hospital, No. 1, Chang-Te Street, Taipei 10016, Taiwan
| | - Yi-Ling Tsai
- School of Dentistry and Graduate Institute of Clinical Dentistry, National Taiwan University and National Taiwan University Hospital, Taipei, Taiwan
| | - Uma Kasimayan
- School of Dentistry and Graduate Institute of Clinical Dentistry, National Taiwan University and National Taiwan University Hospital, Taipei, Taiwan
| | - Mahesh K P O
- School of Dentistry and Graduate Institute of Clinical Dentistry, National Taiwan University and National Taiwan University Hospital, Taipei, Taiwan
| | - Hong-Ping Lin
- Department of Chemistry, National Cheng Kung University. No.1, Daxue Rd., Tainan City 701, Taiwan
| | - Yu-Chih Chiang
- School of Dentistry and Graduate Institute of Clinical Dentistry, National Taiwan University and National Taiwan University Hospital, Taipei, Taiwan; Division of Restorative and Aesthetic Dentistry, Dental Department, National Taiwan University Hospital, No. 1, Chang-Te Street, Taipei 10016, Taiwan; Molecular Imaging Center, National Taiwan University, Taipei 10617, Taiwan; School of Dentistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan.
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Lai YW, Wang SW, Chang CH, Liu SC, Chen YJ, Chi CW, Chiu LP, Chen SS, Chiu AW, Chung CH. Retraction Note: Butein inhibits metastatic behavior in mouse melanoma cells through VEGF expression and translation-dependent signaling pathway regulation. BMC Complement Med Ther 2023; 23:172. [PMID: 37248501 DOI: 10.1186/s12906-023-04010-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023] Open
Affiliation(s)
- Yu-Wei Lai
- Department of Urology, National Yang-Ming University School of Medicine, Taipei, Taiwan
- Division of Urology, Taipei City Hospital Renai Branch, Taipei, Taiwan
| | - Shih-Wei Wang
- Department of Medicine, Mackay Medical College, No. 46, Sec. 3, Jhong-Jheng Rd., Sanzhi Dist, Taipei, Taiwan
| | - Chien-Hsin Chang
- Institute of Pharmacology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Shih-Chia Liu
- Department of Orthopaedics, Mackay Memorial Hospital, Taipei, Taiwan
| | - Yu-Jen Chen
- Department of Medical Research, Mackay Memorial Hospital, Taipei, Taiwan
- Department of Radiation Oncology, Mackay Memorial Hospital, Taipei, Taiwan
| | - Chih-Wen Chi
- Department of Medical Research, Mackay Memorial Hospital, Taipei, Taiwan
| | - Li-Pin Chiu
- Department of Urology, National Yang-Ming University School of Medicine, Taipei, Taiwan
- Division of Urology, Taipei City Hospital Renai Branch, Taipei, Taiwan
| | - Shiou-Sheng Chen
- Department of Urology, National Yang-Ming University School of Medicine, Taipei, Taiwan
- Division of Urology, Taipei City Hospital Renai Branch, Taipei, Taiwan
| | - Allen W Chiu
- Department of Urology, National Yang-Ming University School of Medicine, Taipei, Taiwan
- Division of Urology, Taipei City Hospital Renai Branch, Taipei, Taiwan
| | - Ching-Hu Chung
- Department of Medicine, Mackay Medical College, No. 46, Sec. 3, Jhong-Jheng Rd., Sanzhi Dist, Taipei, Taiwan.
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Lin JF, Chi CW, Huang YC, Tsai TH, Chen YJ. Anti-Cancer Effects of Oxygen-Atom-Modified Derivatives of Wasabi Components on Human Leukemia Cells. Int J Mol Sci 2023; 24:ijms24076823. [PMID: 37047794 PMCID: PMC10095376 DOI: 10.3390/ijms24076823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 04/03/2023] [Accepted: 04/04/2023] [Indexed: 04/14/2023] Open
Abstract
1-Isothiocyanato-6-(methylsulfinyl)-hexanate (6-MITC) is a natural compound found in Wasabia japonica. The synthetic derivatives 1-Isothiocyanato-6-(methylsulfenyl)-hexane (I7447) and 1-Isothiocyanato-6-(methylsulfonyl)-hexane (I7557) were obtained from 6-MITC by deleting and adding an oxygen atom to the sulfone group, respectively. We previously demonstrated that extensive mitotic arrest, spindle multipolarity, and cytoplasmic vacuole accumulation were induced by 6-MITC and inhibited the viability of human chronic myelogenous leukemia K562 cells. In this study, we examined the anti-cancer effects of 6-MITC derivatives on human chronic myelogenous leukemia (CML) cells. Autophagy was identified as the formation of autophagosomes with double-layered membranes using transmission electron microscopy. Cell cycle and differentiation were analyzed using flow cytometry. Apoptosis was detected by annexin V staining. After treatment with I7447 and I7557, the G2/M phase of cell cycle arrest was revealed. Cell death can be induced by a distinct mechanism (the simultaneous occurrence of autophagy and aberrant mitosis). The expression levels of acridine orange were significantly affected by lysosomal inhibitors. The natural wasabi component, 6-MITC, and its synthetic derivatives have similar effects on human chronic myelogenous leukemia cells and may be developed as novel therapeutic agents against leukemia.
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Affiliation(s)
- Jui-Feng Lin
- Division of Neurosurgery, Department of Surgery, MacKay Memorial Hospital, Taipei 104, Taiwan
- Institute of Traditional Medicine, School of Medicine, National Yang Ming Chiao Tung University, Taipei 112, Taiwan
| | - Chih-Wen Chi
- Department of Medical Research, MacKay Memorial Hospital, Taipei 251, Taiwan
| | - Yu-Chuen Huang
- Department of Medical Research, China Medical University Hospital, Taichung 404, Taiwan
- School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung 404, Taiwan
| | - Tung-Hu Tsai
- Institute of Traditional Medicine, School of Medicine, National Yang Ming Chiao Tung University, Taipei 112, Taiwan
| | - Yu-Jen Chen
- Institute of Traditional Medicine, School of Medicine, National Yang Ming Chiao Tung University, Taipei 112, Taiwan
- Department of Medical Research, China Medical University Hospital, Taichung 404, Taiwan
- Department of Radiation Oncology, MacKay Memorial Hospital, Taipei 251, Taiwan
- MacKay Junior College of Medicine, Nursing, and Management, Taipei 112, Taiwan
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Zhang JQ, Chi CW, Zhao WL, Meng QT, Wang LD, Liu JY, Sun FZ, Zhang SL, Liu JH. [Impact of bicuspid aortic valve or tricuspid aortic valve on hemodynamics and left ventricular reverse remodeling in patients after transcatheter aortic valve replacement]. Zhonghua Xin Xue Guan Bing Za Zhi 2022; 50:1193-1200. [PMID: 36517440 DOI: 10.3760/cma.j.cn112148-20221104-00865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Objective: To compare the impact of bicuspid aortic valve (BAV) or tricuspid aortic valve (TAV) on hemodynamics and left ventricular reverse remodeling after transcatheter aortic valve replacement (TAVR). Methods: We retrospectively analyzed the clinical data of patients who underwent TAVR in our hospital from January 2019 to March 2021. Patients were divided into BAV group and TAV group according to aortic contrast-enhanced CT. Each patient was followed up by N-terminal pro B-type natriuretic peptide (NT-proBNP) and echocardiography at four time points, namely before TAVR, 24 hours, 1 month and 6 months after TAVR. Echocardiographic data, including mean pressure gradient (MPG), aortic valve area (AVA), left ventricular ejection fraction (LVEF), left ventricle mass (LVM) and LV mass index (LVMi) were evaluated. Results: A total of 41 patients were included. The age was (75.0±8.6) years, and male patients accounted for 53.7%. There were 19 BAV patients and 22 TAV patients in this cohort. All patients undergoing TAVR using a self-expandable prosthesis Venus-A valve. MPG was (54.16±21.22) mmHg(1 mmHg=0.133 kPa) before TAVR, (21.11±9.04) mmHg at 24 hours after TAVR, (18.84±7.37) mmHg at 1 month after TAVR, (17.68±6.04) mmHg at 6 months after TAVR in BAV group. LVEF was (50.42±13.30)% before TAVR, (53.84±10.59)% at 24 hours after TAVR, (55.68±8.71)% at 1 month after TAVR and (57.42±7.78)% at 6 months after TAVR in BAV group. MPG and LVEF substantially improved at each time point after operation, and the difference was statistically significant (all P<0.05) in BAV group. MPG in TAV group improved at each time point after operation, and the difference was statistically significant (all P<0.05). LVMi was (164.13±49.53), (156.37±39.11), (146.65±38.84) and (134.13±39.83) g/m2 at the 4 time points and the value was significantly reduced at 1 and 6 months post TAVR compared to preoperative level(both P<0.05). LVEF in the TAV group remained unchanged at 24 hours after operation, but it was improved at 1 month and 6 months after operation, and the difference was statistically significant (all P<0.05). LVMi in TAV group substantially improved at each time point after operation, and the difference was statistically significant (all P<0.05). NT-proBNP in both two groups improved after operation, at 1 month and 6 months after operation, and the difference was statistically significant (all P<0.05). MPG in TAV group improved better than in BAV group during the postoperative follow-up (24 hours after TAVR: (11.68±5.09) mmHg vs. (21.11±9.04) mmHg, P<0.001, 1 month after TAVR: (10.82±3.71) mmHg vs. (18.84±7.37) mmHg, P<0.001, 6 months after TAVR: (12.36±4.42) mmHg vs. (17.68±6.04) mmHg, P=0.003). There was no significant difference in NT-proBNP between BAV group and TAV group at each time point after operation (all P>0.05). There was no significant difference in paravalvular regurgitation and second prosthesis implantation between the two groups (all P>0.05). Conclusions: AS patients with BAV or TAV experience hemodynamic improvement and obvious left ventricular reverse remodeling after TAVR, and the therapeutic effects of TAVR are similar between BAV and TAV AS patients in the short-term post TAVR.
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Affiliation(s)
- J Q Zhang
- Department of Cardiology, Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China Dalian Medical University, Dalian 116000, China
| | - C W Chi
- Department of Cardiology, Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - W L Zhao
- Department of Cardiology, Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - Q T Meng
- Department of Cardiology, Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - L D Wang
- Department of Cardiology, Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - J Y Liu
- Department of Cardiology, Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - F Z Sun
- Department of Cardiology, Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - S L Zhang
- Department of Cardiology, Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - J H Liu
- Department of Cardiology, Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
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Lai CT, Chi CW, Wu SH, Shieh HR, Yen JC, Chen YJ. Midostaurin Modulates Tumor Microenvironment and Enhances Efficacy of Anti-PD-1 against Colon Cancer. Cancers (Basel) 2022; 14:cancers14194847. [PMID: 36230769 PMCID: PMC9563721 DOI: 10.3390/cancers14194847] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 09/29/2022] [Accepted: 09/30/2022] [Indexed: 11/16/2022] Open
Abstract
Simple Summary Colon cancer is one of the most common types of cancer worldwide. Immune checkpoint inhibitors have promising effects on various types of cancers with limited efficacy in colon cancer. Midostaurin (PKC412) is currently used for the treatment of patients with acute myeloid leukemia harboring FLT3-mutation. The aim of this study was to assess the potential effect of midostaurin on the modulation of TME and the efficacy of anti-PD-1 against colon cancer. We showed midostaurin inhibited colorectal adenocarcinoma cell growth and induced multinucleation and micronuclei formation. Midostaurin inhibited colorectal adenocarcinoma cell growth associated with the formation of dsDNA and ssDNA; the up-regulation of mRNA expression of cGAS, STING, IRF3, and IFNAR1; the down-regulation of Trex-1, c-Kit, and Flt3 protein expression. The tumor-implanted model displayed a combination of midostaurin-enhanced efficacy of anti-PD-1 to suppress tumor growth. In TME, midostaurin diminished Treg cells and increased M1 macrophage. The expressions of STING and INFβ proteins were elevated in the tumor specimens. Our results suggest that midostaurin may have the potential to enhance immunotherapy in clinical practice. Abstract Immunotherapy modulating the tumor microenvironment (TME) immune function has a promising effect on various types of cancers, but it remains as a limited efficacy in colon cancer. Midostaurin (PKC412) has been used in the clinical treatment of fms-like tyrosine kinase 3 (FLT3)-mutant acute myeloid leukemia and has demonstrated immunomodulatory activity. We aimed to evaluate the effect of midostaurin on the modulation of TME and the efficacy of anti-programmed cell death protein 1 (PD-1) against colon cancer. Midostaurin inhibited the growth of murine CT26 and human HCT116 and SW480 cells with multinucleation and micronuclei formation in morphology examination. The cell cycle arrested in the G2/M phase and the formation of the polyploid phase was noted. The formation of cytosolic DNA, including double-strand and single-strand DNA, was increased. Midostaurin increased mRNA expressions of cGAS, IRF3, and IFNAR1 in colorectal adenocarcinoma cells and mouse spleen macrophages. The protein expressions of Trex-1, c-KIT, and Flt3, but not PKCα/β/γ and VEGFR1, were down-regulated in midostaurin-treated colorectal adenocarcinoma cells and macrophages. Trex-1 protein expression was abrogated after FLT3L activation. In vivo, the combination of midostaurin and anti-PD-1 exhibited the greatest growth inhibition on a CT26-implanted tumor without major toxicity. TME analysis demonstrated that midostaurin alone decreased Treg cells and increased neutrophils and inflammatory monocytes. NKG2D+ and PD-1 were suppressed and M1 macrophage was increased after combination therapy. When combined with anti-PD-1, STING and INFβ protein expression was elevated in the tumor. The oral administration of midostaurin may have the potential to enhance anti-PD-1 efficacy, accompanied by the modulation of cytosolic DNA-sensing signaling and tumor microenvironment.
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Affiliation(s)
- Cheng-Ta Lai
- Institute of Pharmacology, College of Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan
- Division of Colon and Rectal Surgery, Department of Surgery, MacKay Memorial Hospital, Taipei 104217, Taiwan
| | - Chih-Wen Chi
- Department Medical Research, MacKay Memorial Hospital, New Taipei City 251020, Taiwan
| | - Shu-Hua Wu
- Department Medical Research, MacKay Memorial Hospital, New Taipei City 251020, Taiwan
| | - Hui-Ru Shieh
- Department Medical Research, MacKay Memorial Hospital, New Taipei City 251020, Taiwan
| | - Jiin-Cherng Yen
- Institute of Pharmacology, College of Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan
- Correspondence: (J.-C.Y.); (Y.-J.C.); Tel.: +886-2-2826-7000 (ext. 67090) (J.-C.Y.); +886-2-2543-3535 (ext. 3041) (Y.-J.C.)
| | - Yu-Jen Chen
- Department Medical Research, MacKay Memorial Hospital, New Taipei City 251020, Taiwan
- Department of Radiation Oncology, MacKay Memorial Hospital, Taipei 104217, Taiwan
- Department of Artificial Intelligence and Medical Application, MacKay Junior College of Medicine, Nursing and Management, Taipei 112021, Taiwan
- Department of Medical Research, China Medical University Hospital, Taichung 404332, Taiwan
- Correspondence: (J.-C.Y.); (Y.-J.C.); Tel.: +886-2-2826-7000 (ext. 67090) (J.-C.Y.); +886-2-2543-3535 (ext. 3041) (Y.-J.C.)
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Huang TS, Ko CJ, Lin JC, Hsu ML, Ko CC, Chi CW, Tsai TH, Chen YJ. Wasabi Component 6-(Methylsulfinyl)hexly Isothiocyanate and Derivatives Improve the Survival of Skin Allografts. Int J Mol Sci 2022; 23:ijms23158488. [PMID: 35955623 PMCID: PMC9369098 DOI: 10.3390/ijms23158488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 07/21/2022] [Accepted: 07/28/2022] [Indexed: 02/06/2023] Open
Abstract
We tested the effect of 6-(Methylsulfinyl)hexyl Isothiocyanate (6-MITC) and derivatives (I7447 and I7557) on the differentiation and maturation of human myeloid dendritic cells (DCs) in vitro, and skin transplantation in vivo. Triggering of CD14+ myeloid monocyte development toward myeloid DCs with and without 6-MITC and derivatives to examine the morphology, viability, surface marker expression, and cytokine production. Stimulatory activity on allogeneic naive T cells was measured by proliferation and interferon-γ production. The skin allograft survival area model was used to translate the 6-MITC and derivatives’ antirejection effect. All of the compounds had no significant effects on DC viability and reduced the formation of dendrites at concentrations higher than 10 μM. At this concentration, 6-MITC and I7557, but not I7447, inhibited the expression of CD1a and CD83. Both 6-MITC and I7557 exhibited T-cells and interferon-γ augmentation at lower concentrations and suppression at higher concentration. The 6-MITC and I7557 prolonged skin graft survival. Both the 6-MITC and I7557 treatment resulted in the accumulation of regulatory T cells in recipient rat spleens. No toxicity was evident in 6-MITC and I7557 treatment. The 6-MITC and I7557 induced human DC differentiation toward a tolerogenic phenotype and prolonged rat skin allograft survival. These compounds may be effective as immunosuppressants against transplant rejection.
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Affiliation(s)
- Tun-Sung Huang
- Institute of Traditional Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan;
- Department of Surgery, MacKay Memorial Hospital, Taipei 10449, Taiwan;
| | - Chih-Jung Ko
- Department Medical Research, MacKay Memorial Hospital, New Taipei City 251020, Taiwan; (C.-J.K.); (M.-L.H.); (C.-C.K.); (C.-W.C.)
| | - Jiunn-Chang Lin
- Department of Surgery, MacKay Memorial Hospital, Taipei 10449, Taiwan;
- MacKay Junior College of Medicine, Nursing, and Management, New Taipei City 11260, Taiwan
- Department of Surgery, MacKay Medical College, New Taipei City 25245, Taiwan
| | - Ming-Ling Hsu
- Department Medical Research, MacKay Memorial Hospital, New Taipei City 251020, Taiwan; (C.-J.K.); (M.-L.H.); (C.-C.K.); (C.-W.C.)
| | - Chun-Chuan Ko
- Department Medical Research, MacKay Memorial Hospital, New Taipei City 251020, Taiwan; (C.-J.K.); (M.-L.H.); (C.-C.K.); (C.-W.C.)
| | - Chih-Wen Chi
- Department Medical Research, MacKay Memorial Hospital, New Taipei City 251020, Taiwan; (C.-J.K.); (M.-L.H.); (C.-C.K.); (C.-W.C.)
| | - Tung-Hu Tsai
- Institute of Traditional Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan;
- Correspondence: (T.-H.T.); (Y.-J.C.); Tel.: +886-2-2826-7115 (T.-H.T.); +886-2-2543-3535 (ext. 3041) (Y.-J.C.)
| | - Yu-Jen Chen
- Institute of Traditional Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan;
- Department Medical Research, MacKay Memorial Hospital, New Taipei City 251020, Taiwan; (C.-J.K.); (M.-L.H.); (C.-C.K.); (C.-W.C.)
- Department of Radiation Oncology, MacKay Memorial Hospital, Taipei 104217, Taiwan
- Department of Artificial Intelligence and Medical Application, MacKay Junior College of Medicine, Nursing and Management, Taipei 112021, Taiwan
- Department of Medical Research, China Medical University Hospital, Taichung 404332, Taiwan
- Correspondence: (T.-H.T.); (Y.-J.C.); Tel.: +886-2-2826-7115 (T.-H.T.); +886-2-2543-3535 (ext. 3041) (Y.-J.C.)
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10
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Lin JF, Liu YS, Huang YC, Chi CW, Tsai CC, Tsai TH, Chen YJ. Borneol and Tetrandrine Modulate the Blood-Brain Barrier and Blood-Tumor Barrier to Improve the Therapeutic Efficacy of 5-Fluorouracil in Brain Metastasis. Integr Cancer Ther 2022; 21:15347354221077682. [PMID: 35168384 PMCID: PMC8855435 DOI: 10.1177/15347354221077682] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The efficacy of chemotherapeutic drugs for the treatment of brain metastasis may
be compromised by the blood–brain barrier (BBB) and blood–tumor barrier (BTB).
P-glycoprotein (P-gp) is a multidrug resistance protein that potentially limits
the penetration of chemotherapeutics through the BBB and BTB. 5-Fluorouracil
(5-FU) is widely used to treat cancer. Bioactive constituents of medicinal
herbs, such as borneol and tetrandrine, potentially improve drug penetration
through the BBB and BTB. We hypothesized that borneol and tetrandrine might
modulate the BBB and BTB to enhance 5-FU penetration into the brain. To
investigate this, in vitro and in vivo models were developed to explore the
modulatory effects of borneol and tetrandrine on 5-FU penetration through the
BBB and BTB. In the in vitro models, barrier integrity, cell viability, barrier
penetration, P-gp activity, and NF-κB expression were assessed. In the in vivo
brain metastasis models, cancer cells were injected into the internal carotid
artery to evaluate tumor growth. The experimental results demonstrated that
borneol and borneol + tetrandrine reduced BBB integrity. The efflux pump
function of P-gp was partially inhibited by tetrandrine and
borneol + tetrandrine. In the in vivo experiment, borneol + tetrandrine
effectively prolonged survival without compromising body weight. In conclusion,
BBB and BTB integrity was modulated by borneol and borneol + tetrandrine. The
combination of borneol and tetrandrine could be used to improve the
chemotherapeutic control of brain metastasis.
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Affiliation(s)
- Jui-Feng Lin
- Department of Surgery, Mackay Memorial Hospital, Taipei, Taiwan.,Institute of Traditional Medicine, School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Yen-Shuo Liu
- Department of Medical Research, Mackay Memorial Hospital, Taipei, Taiwan
| | - Yu-Chuen Huang
- Department of Medical Research, China Medical University Hospital, Taichung, Taiwan.,School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan
| | - Chih-Wen Chi
- Department of Medical Research, Mackay Memorial Hospital, Taipei, Taiwan
| | - Cheng-Chia Tsai
- Department of Medicine, Mackay Medical College, New Taipei City, Taiwan
| | - Tung-Hu Tsai
- Institute of Traditional Medicine, School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Yu-Jen Chen
- Institute of Traditional Medicine, School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan.,Department of Medical Research, China Medical University Hospital, Taichung, Taiwan.,Department of Radiation Oncology, Mackay Memorial Hospital, Taipei, Taiwan.,Mackay Junior College of Medicine, Nursing, and Management, Taipei, Taiwan
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11
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Tang P, Tan C, Pang Q, Chi CW, Wang Y, Yuan Z, Huang YC, Chen YJ. Combination of 35-Gene Mutation Profile and Radiotherapy Dosimetry Predicts the Therapeutic Outcome of Definitive Chemoradiation in Patients With Esophageal Squamous Cell Carcinoma. Front Oncol 2021; 11:729418. [PMID: 34513706 PMCID: PMC8430340 DOI: 10.3389/fonc.2021.729418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Accepted: 08/11/2021] [Indexed: 12/24/2022] Open
Abstract
Esophageal cancer is a common malignancy worldwide and a leading cause of cancer-related mortality. Definitive concurrent chemoradiotherapy (CCRT) has been widely used to treat locally advanced esophageal squamous cell carcinoma (ESCC). In this study, we evaluated the predictive power of a 35-gene mutation profile and radiation parameters in patients with ESCC. Data from 44 patients with ESCC who underwent definitive CCRT were retrospectively reviewed. A 35-gene mutation profile, derived from reported ESCC-specific next-generation sequencing results, and radiation dosimetry parameters were examined using the Kaplan–Meier curve and Cox proportional hazards model. All patients were native Chinese and underwent CCRT with a median follow-up time of 22.0 months. Significant prognostic factors affecting progression-free survival in the multivariable Cox regression model were clinical nodal staging ≥2 (hazard ratio, HR: 2.52, 95% CI: 1.15–5.54, p = 0.022), ≥10% lung volume receiving ≥30 Gy (V30) (HR: 2.36, 95% CI: 1.08–5.17, p = 0.032), and mutation of fibrous sheath interacting protein 2 (FSIP2) (HR: 0.08, 95% CI: 0.01–0.58, p = 0.013). For overall survival, significant prognostic factors in the multivariable Cox regression model were lung V30 ≥10% (HR: 3.71, 95% CI: 1.48–9.35, p = 0.005) and mutation of spectrin repeat containing nuclear envelope protein 1 (SYNE1) (HR: 2.95, 95% CI: 1.25–6.97, p = 0.014). Our cohort showed higher MUC17 (79.5% vs. 5.7%), FSIP2 (18.2% vs. 6.2%), and SYNE1 (38.6% vs. 11.0%) mutation rates and lower TP53 (38.6% vs. 68.7%) mutation rates than the ESCC cohorts from The Cancer Genome Atlas. In conclusion, by using a combination of a 35-gene mutation profile and radiotherapy dosimetry, mutations in FSIP2 and SYNE1 as well as lung V30 were identified as potential predictors for developing a prediction model for clinical outcomes in patients with ESCC administered definitive CCRT.
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Affiliation(s)
- Peng Tang
- Department of Esophagus Surgery, Key Laboratory of Prevention and Therapy, National Clinical Research Center of Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China
| | - Chen Tan
- Department of Radiation Oncology, Minzu Hospital of Guangxi Zhuang Autonomous Region, Affiliated Minzu Hospital of Guangxi Medical University, Nanning, China
| | - Qingsong Pang
- Department Radiation Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin's Clinical Research Center for Cancer, Tianjin, China
| | - Chih-Wen Chi
- Department of Medical Research, MacKay Memorial Hospital, New Taipei City, Taiwan
| | - Yuwen Wang
- Department Radiation Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin's Clinical Research Center for Cancer, Tianjin, China
| | - Zhiyong Yuan
- Department Radiation Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin's Clinical Research Center for Cancer, Tianjin, China
| | - Yu-Chuen Huang
- School of Chinese Medicine, China Medical University, Taichung, Taiwan.,Department of Medical Research, China Medical University Hospital, Taichung, Taiwan
| | - Yu-Jen Chen
- Department of Medical Research, China Medical University Hospital, Taichung, Taiwan.,Department of Radiation Oncology, MacKay Memorial Hospital, Taipei, Taiwan.,Department of Nursing, MacKay Junior College of Medicine, Nursing and Management, Taipei, Taiwan
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12
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Yu CL, Weng MS, Chen WC, Chien KT, Chi CW, Chung CH, Huang CW, Wang PC, Chen CC, Tsai AC, Liu SC, Wang SW. Moscatilin Inhibits Metastatic Behavior of Human Hepatocellular Carcinoma Cells: A Crucial Role of uPA Suppression via Akt/NF-κB-Dependent Pathway. Int J Mol Sci 2021; 22:ijms22062930. [PMID: 33805784 PMCID: PMC8002083 DOI: 10.3390/ijms22062930] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 03/05/2021] [Accepted: 03/10/2021] [Indexed: 12/28/2022] Open
Abstract
Hepatocellular carcinoma (HCC) frequently shows early invasion into blood vessels as well as intrahepatic metastasis. Innovations of novel small-molecule agents to block HCC invasion and subsequent metastasis are urgently needed. Moscatilin is a bibenzyl derivative extracted from the stems of a traditional Chinese medicine, orchid Dendrobium loddigesii. Although moscatilin has been reported to suppress tumor angiogenesis and growth, the anti-metastatic property of moscatilin has not been elucidated. The present results revealed that moscatilin inhibited metastatic behavior of HCC cells without cytotoxic fashion in highly invasive human HCC cell lines. Furthermore, moscatilin significantly suppressed the activity of urokinase plasminogen activator (uPA), but not matrix metalloproteinase (MMP)-2 and MMP-9. Interestingly, moscatilin-suppressed uPA activity was through down-regulation the protein level of uPA, and did not impair the uPA receptor and uPA inhibitory molecule (PAI-1) expressions. Meanwhile, the mRNA expression of uPA was inhibited via moscatilin in a concentration-dependent manner. In addition, the expression of phosphorylated Akt, rather than ERK1/2, was inhibited by moscatilin treatment. The expression of phosphor-IκBα, and -p65, as well as κB-luciferase activity were also repressed after moscatilin treatment. Transfection of constitutively active Akt (Myr-Akt) obviously restored the moscatilin-inhibited the activation of NF-κB and uPA, and cancer invasion in HCC cells. Taken together, these results suggest that moscatilin impedes HCC invasion and uPA expression through the Akt/NF-κB signaling pathway. Moscatilin might serve as a potential anti-metastatic agent against the disease progression of human HCC.
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Affiliation(s)
- Chen-Lin Yu
- Institute of Biomedical Sciences, MacKay Medical College, New Taipei City 252, Taiwan; (C.-L.Y.); (C.-W.H.)
- Department of Medicine, MacKay Medical College, New Taipei City 252, Taiwan; (W.-C.C.); (C.-H.C.)
| | - Meng-Shih Weng
- Department of Nutritional Science, Fu Jen Catholic University, New Taipei City 252, Taiwan;
| | - Wei-Cheng Chen
- Department of Medicine, MacKay Medical College, New Taipei City 252, Taiwan; (W.-C.C.); (C.-H.C.)
- Department of Orthopedic Surgery, MacKay Memorial Hospital, Taipei 104, Taiwan;
| | - Kai-Ting Chien
- Department of Orthopedic Surgery, MacKay Memorial Hospital, Taipei 104, Taiwan;
| | - Chih-Wen Chi
- Department of Medical Research, MacKay Memorial Hospital, New Taipei City 252, Taiwan;
| | - Ching-Hu Chung
- Department of Medicine, MacKay Medical College, New Taipei City 252, Taiwan; (W.-C.C.); (C.-H.C.)
| | - Chia-Wen Huang
- Institute of Biomedical Sciences, MacKay Medical College, New Taipei City 252, Taiwan; (C.-L.Y.); (C.-W.H.)
| | - Po-Chuan Wang
- Department of Gastroenterology, Hsinchu MacKay Memorial Hospital, Hsinchu City 300, Taiwan;
| | - Chien-Chih Chen
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei 104, Taiwan;
| | - An-Chi Tsai
- Pharmacological Institutes, College of Medicine, National Taiwan University, Taipei 104, Taiwan;
| | - Shih-Chia Liu
- Department of Orthopedic Surgery, MacKay Memorial Hospital, Taipei 104, Taiwan;
- Correspondence: (S.-C.L.); (S.-W.W.); Tel.: +886-2-25433535 (S.-C.L.); +886-2-26360303 (S.-W.W.)
| | - Shih-Wei Wang
- Institute of Biomedical Sciences, MacKay Medical College, New Taipei City 252, Taiwan; (C.-L.Y.); (C.-W.H.)
- Department of Medicine, MacKay Medical College, New Taipei City 252, Taiwan; (W.-C.C.); (C.-H.C.)
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Correspondence: (S.-C.L.); (S.-W.W.); Tel.: +886-2-25433535 (S.-C.L.); +886-2-26360303 (S.-W.W.)
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13
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Abstract
TLC388, a camptothecin-derivative targeting topoisomerase I, is a potential anticancer drug. In this study, its effect on A549 and H838 human non-small cell lung cancer (NSCLC) cells was investigated. Cell viability and proliferation were determined by thiazolyl blue tetrazolium bromide and clonogenic assays, respectively, and cell cycle analysis and detection of phosphorylated histone H3 (Ser10) were performed by flow cytometry. γ-H2AX protein; G2/M phase-associated molecules ataxia-telangiectasia mutated (ATM), CHK1, CHK2, CDC25C, CDC2, and cyclin B1; and apoptosis were assessed with immunofluorescence staining, immunoblotting, and an annexin V assay, respectively. The effect of co-treatment with CHIR124 (a checkpoint kinase 1 [CHK1] inhibitor) was also studied. TLC388 decreased the viability and proliferation of cells of both NSCLC lines in a dose-dependent manner. TLC388 inhibited the viability of NSCLC cell lines with an estimated concentration of 50% inhibition (IC50), which was 4.4 and 4.1 μM for A549 and H838 cells, respectively, after 24 hours. Moreover, it resulted in the accumulation of cells at the G2/M phase and increased γ-H2AX levels in A549 cells. Levels of the G2 phase-related molecules phosphorylated ATM, CHK1, CHK2, CDC25C, and cyclin B1 were increased in TLC388-treated cells. CHIR124 enhanced the cytotoxicity of TLC388 toward A549 and H838 cells and induced apoptosis of the former. TLC388 inhibits NSCLC cell growth by inflicting DNA damage and activating G2/M checkpoint proteins that trigger G2 phase cell cycle arrest to enable DNA repair. CHIR124 enhanced the cytotoxic effect of TLC388 and induced apoptosis.
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Affiliation(s)
- Kun-Ming Wu
- Institute of Physiology, School of Medicine, National Yang-Ming University, Taipei.,Chest Division, Department of Internal Medicine, MacKay Memorial Hospital, Taipei.,Mackay Junior College of Medicine, Nursing, and Management, Taipei
| | - Chih-Wen Chi
- Department of Medical Research, MacKay Memorial Hospital, New Taipei.,Department of Nursing, MacKay Medical College, New Taipei
| | | | - Yu-Jen Chen
- Mackay Junior College of Medicine, Nursing, and Management, Taipei.,Department of Medical Research, MacKay Memorial Hospital, New Taipei.,Department of Medical Research, China Medical University Hospital, Taichung.,Department of Radiation Oncology, MacKay Memorial Hospital, Taipei
| | - Yu Ru Kou
- Institute of Physiology, School of Medicine, National Yang-Ming University, Taipei
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14
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Yang CN, Lin SK, Kok SH, Wang HW, Lee YL, Shun CT, Chi CW, Yang H, Hong CY. The possible role of sirtuin 5 in the pathogenesis of apical periodontitis. Oral Dis 2020; 27:1766-1774. [PMID: 33191606 DOI: 10.1111/odi.13723] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 10/07/2020] [Accepted: 11/07/2020] [Indexed: 12/12/2022]
Abstract
OBJECTIVES We investigated the relation between expression of sirtuin 5 (SIRT5) in osteoblastic cells and progression of apical periodontitis. The role of SIRT5 in hypoxia-induced reactive oxygen species (ROS) formation and osteoblast apoptosis was also examined. MATERIALS AND METHODS Progression of rat apical periodontitis was monitored by conventional radiography and microcomputed tomography. SIRT5 and oxidative stress biomarker 8-OHdG in bone-lining cells were assessed by immunohistochemistry. Terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling was used to demonstrate apoptosis. In primary human osteoblasts cultured under hypoxia, Western blot was used to analyze SIRT5 expression and cleavage of pro-caspase 3 and poly(ADP-ribose) polymerase (PARP). SIRT5 was overexpressed through lentiviral technique. ROS formation and mitochondrial membrane potential changes were assessed by MitoSOX-Red and JC-1 fluorescence, respectively. Immunofluorescence microscope was used to evaluate mitochondrial release of cytochrome c. RESULTS In rat apical periodontitis, disease progression was accompanied by decreased expression of SIRT5, increased oxidative stress, and enhanced apoptosis in bone-lining cells. SIRT5 was suppressed in cultured osteoblasts under hypoxia. SIRT5 overexpression ameliorated hypoxia-enhanced ROS formation, mitochondrial depolarization, cytochrome c leakage, activation of caspase-3, and PARP fragmentation. CONCLUSIONS SIRT5 is able to alleviate hypoxia-enhanced osteoblast apoptosis. SIRT5 augmentation may have therapeutic potential for apical periodontitis.
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Affiliation(s)
- Cheng-Ning Yang
- Department of Dentistry, School of Dentistry, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Sze-Kwan Lin
- Department of Dentistry, School of Dentistry, College of Medicine, National Taiwan University, Taipei, Taiwan.,Department of Dentistry, National Taiwan University Hospital, Taipei, Taiwan
| | - Sang-Heng Kok
- Department of Dentistry, School of Dentistry, College of Medicine, National Taiwan University, Taipei, Taiwan.,Department of Dentistry, National Taiwan University Hospital, Taipei, Taiwan
| | - Han-Wei Wang
- Department of Dentistry, National Taiwan University Hospital, Taipei, Taiwan.,Graduate Institute of Clinical Dentistry, National Taiwan University, Taipei, Taiwan
| | - Yuan-Ling Lee
- Department of Dentistry, National Taiwan University Hospital, Taipei, Taiwan.,Graduate Institute of Clinical Dentistry, National Taiwan University, Taipei, Taiwan
| | - Chia-Tung Shun
- Department of Forensic Medicine and Pathology, National Taiwan University Hospital, Taipei, Taiwan
| | - Chih-Wen Chi
- Department of Dentistry, National Taiwan University Hospital, Hsin-Chu Branch, Taiwan
| | - Hsiang Yang
- Department of Dentistry, National Taiwan University Hospital, Taipei, Taiwan
| | - Chi-Yuan Hong
- Department of Dentistry, School of Dentistry, College of Medicine, National Taiwan University, Taipei, Taiwan.,Department of Dentistry, National Taiwan University Hospital, Taipei, Taiwan.,College of Bio-Resources and Agriculture, National Taiwan University, Taipei, Taiwan
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15
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Wang SW, Lee CH, Lin MS, Chi CW, Chen YJ, Wang GS, Liao KW, Chiu LP, Wu SH, Huang DM, Chen L, Shen YS. ZnO Nanoparticles Induced Caspase-Dependent Apoptosis in Gingival Squamous Cell Carcinoma through Mitochondrial Dysfunction and p70S6K Signaling Pathway. Int J Mol Sci 2020; 21:ijms21051612. [PMID: 32111101 PMCID: PMC7084801 DOI: 10.3390/ijms21051612] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 02/07/2020] [Accepted: 02/20/2020] [Indexed: 12/17/2022] Open
Abstract
Zinc oxide nanoparticles (ZnO-NPs) are increasingly used in sunscreens, food additives, pigments, rubber manufacture, and electronic materials. Several studies have shown that ZnO-NPs inhibit cell growth and induce apoptosis by the production of oxidative stress in a variety of human cancer cells. However, the anti-cancer property and molecular mechanism of ZnO-NPs in human gingival squamous cell carcinoma (GSCC) are not fully understood. In this study, we found that ZnO-NPs induced growth inhibition of GSCC (Ca9-22 and OECM-1 cells), but no damage in human normal keratinocytes (HaCaT cells) and gingival fibroblasts (HGF-1 cells). ZnO-NPs caused apoptotic cell death of GSCC in a concentration-dependent manner by the quantitative assessment of oligonucleosomal DNA fragmentation. Flow cytometric analysis of cell cycle progression revealed that sub-G1 phase accumulation was dramatically induced by ZnO-NPs. In addition, ZnO-NPs increased the intracellular reactive oxygen species and specifically superoxide levels, and also decreased the mitochondrial membrane potential. ZnO-NPs further activated apoptotic cell death via the caspase cascades. Importantly, anti-oxidant and caspase inhibitor clearly prevented ZnO-NP-induced cell death, indicating the fact that superoxide-induced mitochondrial dysfunction is associated with the ZnO-NP-mediated caspase-dependent apoptosis in human GSCC. Moreover, ZnO-NPs significantly inhibited the phosphorylation of ribosomal protein S6 kinase (p70S6K kinase). In a corollary in vivo study, our results demonstrated that ZnO-NPs possessed an anti-cancer effect in a zebrafish xenograft model. Collectively, these results suggest that ZnO-NPs induce apoptosis through the mitochondrial oxidative damage and p70S6K signaling pathway in human GSCC. The present study may provide an experimental basis for ZnO-NPs to be considered as a promising novel anti-tumor agent for the treatment of gingival cancer.
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Affiliation(s)
- Shih-Wei Wang
- Department of Medicine, MacKay Medical College, New Taipei City 252, Taiwan;
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Chien-Hsing Lee
- Department of Pharmacology, Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan;
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 807, Taiwan
| | - Ming-Shen Lin
- Department of Water Resources and Environmental Engineering, Tamkang University, New Taipei City 251, Taiwan;
| | - Chih-Wen Chi
- Department of Nursing, MacKay Medical College, New Taipei City 252, Taiwan;
- Department of Medical Research, MacKay Memorial Hospital, Taipei 104, Taiwan
| | - Yu-Jen Chen
- MacKay Junior College of Medicine, Nursing, and Management, Taipei 112, Taiwan;
- Department of Radiation Oncology, MacKay Memorial Hospital, Taipei 104, Taiwan
| | - Guo-Shou Wang
- Department of Biological Science and Technology, National Chiao Tung University, Hsinchu 300, Taiwan; (G.-S.W.); (K.-W.L.)
- Department of Orthopaedics, MacKay Memorial Hospital, Taipei 104, Taiwan
| | - Kuang-Wen Liao
- Department of Biological Science and Technology, National Chiao Tung University, Hsinchu 300, Taiwan; (G.-S.W.); (K.-W.L.)
- Institute of Molecular Medicine and Bioengineering, National Chiao Tung University, Hsinchu 300, Taiwan
| | - Li-Pin Chiu
- General Education Center, University of Taipei, Taipei 100, Taiwan;
- Division of General Surgery, Taipei City Hospital, Taipei 103, Taiwan
| | - Shu-Hui Wu
- Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, Miaoli County 350, Taiwan;
| | - Dong-Ming Huang
- Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, Miaoli County 350, Taiwan;
- Correspondence: (D.-M.H.); (L.C.); (Y.-S.S.); Tel.: +886-37-246-166 (ext. 38105) (D.-M.H.); +886-2-2621-5656 (ext. 2682) (L.C.); +886-2-2636-0303 (ext. 1422) (Y.-S.S.)
| | - Luke Chen
- Department of Water Resources and Environmental Engineering, Tamkang University, New Taipei City 251, Taiwan;
- Correspondence: (D.-M.H.); (L.C.); (Y.-S.S.); Tel.: +886-37-246-166 (ext. 38105) (D.-M.H.); +886-2-2621-5656 (ext. 2682) (L.C.); +886-2-2636-0303 (ext. 1422) (Y.-S.S.)
| | - Yung-Shuen Shen
- Institute of Geriatric Welfare Technology and Science, MacKay Medical College, New Taipei City 252, Taiwan
- Correspondence: (D.-M.H.); (L.C.); (Y.-S.S.); Tel.: +886-37-246-166 (ext. 38105) (D.-M.H.); +886-2-2621-5656 (ext. 2682) (L.C.); +886-2-2636-0303 (ext. 1422) (Y.-S.S.)
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16
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Yang CY, Chen C, Lin CY, Chen YH, Lin CY, Chi CW, Chen YJ, Liu SC, Chang TK, Tang CH, Lai YW, Tsai HJ, Chen JJ, Wang SW. Garcimultiflorone K inhibits angiogenesis through Akt/eNOS- and mTOR-dependent pathways in human endothelial progenitor cells. Phytomedicine 2019; 64:152911. [PMID: 31454653 DOI: 10.1016/j.phymed.2019.152911] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [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: 12/01/2018] [Revised: 03/13/2019] [Accepted: 04/01/2019] [Indexed: 06/10/2023]
Abstract
Background Garcimultiflorone K is a novel polyprenylated polycyclic acylphloroglucinol isolated from the stems of Garcinia multiflora that exhibits promising anti-angiogenic activity in human endothelial progenitor cells (EPCs). Purpose This study sought to determine the underlying anti-angiogenic mechanisms and pharmacological properties of garcimultiflorone K. Methods We examined the anti-angiogenic effects of garcimultiflorone K and its mechanisms of action using in vitro EPC models and in vivo zebrafish embryos. Results EPCs proliferation, migration, differentiation and capillary-like tube formation were effectively and concentration-dependently inhibited by garcimultiflorone K without any signs of cytotoxicity. Our investigations revealed that garcimultiflorone K suppressed EPCs angiogenesis through Akt, mTOR, p70S6K, and eNOS signaling cascades. Notably, garcimultiflorone K dose-dependently impeded angiogenesis in zebrafish embryos. Conclusion Our data demonstrate the anti-angiogneic effects of garcimultiflorone K in both in vitro and in vivo models. Garcimultiflorone K appears to have potential in the treatment of angiogenesis-related diseases.
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Affiliation(s)
- Chen-Yu Yang
- Department of Orthopaedics, MacKay Memorial Hospital, Taipei, Taiwan
| | - Chi Chen
- Department of Medicine, Mackay Medical College, No. 46, Sec. 3, Zhongzheng Rd., Sanzhi Dist., New Taipei City, Taiwan
| | - Cheng-Yung Lin
- Institute of Biomedical Sciences, Mackay Medical College, New Taipei City, Taiwan
| | - Yi-Hsuan Chen
- Department of Medicine, Mackay Medical College, No. 46, Sec. 3, Zhongzheng Rd., Sanzhi Dist., New Taipei City, Taiwan
| | - Chih-Yang Lin
- Department of Medicine, Mackay Medical College, No. 46, Sec. 3, Zhongzheng Rd., Sanzhi Dist., New Taipei City, Taiwan
| | - Chih-Wen Chi
- Department of Medical Research, MacKay Memorial Hospital, New Taipei City, Taiwan
| | - Yu-Jen Chen
- Department of Medical Research, MacKay Memorial Hospital, New Taipei City, Taiwan; Department of Radiation Oncology, MacKay Memorial Hospital, Taipei, Taiwan
| | - Shih-Chia Liu
- Department of Orthopaedics, MacKay Memorial Hospital, Taipei, Taiwan
| | - Ting-Kuo Chang
- Department of Orthopaedics, MacKay Memorial Hospital, Taipei, Taiwan; Department of Medicine, Mackay Medical College, No. 46, Sec. 3, Zhongzheng Rd., Sanzhi Dist., New Taipei City, Taiwan
| | - Chih-Hsin Tang
- Chinese Medicine Research Center, China Medical University, Taichung, Taiwan; Department of Pharmacology, School of Medicine, China Medical University, Taichung, Taiwan; Department of Biotechnology, College of Health Science, Asia University, Taichung, Taiwan
| | - Yu-Wei Lai
- Division of Urology, Taipei City Hospital Renai Branch, Taipei, Taiwan; Department of Urology, National Yang-Ming University School of Medicine, Taipei, Taiwan
| | - Huai-Jen Tsai
- Institute of Biomedical Sciences, Mackay Medical College, New Taipei City, Taiwan
| | - Jih-Jung Chen
- Faculty of Pharmacy, School of Pharmaceutical Sciences, National Yang-Ming University, No.155, Sec.2, Linong Street, Taipei, Taiwan; Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan.
| | - Shih-Wei Wang
- Department of Medicine, Mackay Medical College, No. 46, Sec. 3, Zhongzheng Rd., Sanzhi Dist., New Taipei City, Taiwan; Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan.
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17
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Tai HC, Lee TH, Tang CH, Chen LP, Chen WC, Lee MS, Chen PC, Lin CY, Chi CW, Chen YJ, Lai CT, Chen SS, Liao KW, Lee CH, Wang SW. Phomaketide A Inhibits Lymphangiogenesis in Human Lymphatic Endothelial Cells. Mar Drugs 2019; 17:md17040215. [PMID: 30959907 PMCID: PMC6520718 DOI: 10.3390/md17040215] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 03/29/2019] [Accepted: 04/02/2019] [Indexed: 12/15/2022] Open
Abstract
Lymphangiogenesis is an important biological process associated with cancer metastasis. The development of new drugs that block lymphangiogenesis represents a promising therapeutic strategy. Marine fungus-derived compound phomaketide A, isolated from the fermented broth of Phoma sp. NTOU4195, has been reported to exhibit anti-angiogenic and anti-inflammatory effects. However, its anti-lymphangiogenic activity has not been clarified to date. In this study, we showed that phomaketide A inhibited cell growth, migration, and tube formation of lymphatic endothelial cells (LECs) without an evidence of cytotoxicity. Mechanistic investigations revealed that phomaketide A reduced LECs-induced lymphangiogenesis via vascular endothelial growth factor receptor-3 (VEGFR-3), protein kinase Cδ (PKCδ), and endothelial nitric oxide synthase (eNOS) signalings. Furthermore, human proteome array analysis indicated that phomaketide A significantly enhanced the protein levels of various protease inhibitors, including cystatin A, serpin B6, tissue factor pathway inhibitor (TFPI), and tissue inhibitor matrix metalloproteinase 1 (TIMP-1). Importantly, phomaketide A impeded tumor growth and lymphangiogenesis by decreasing the expression of LYVE-1, a specific marker for lymphatic vessels, in tumor xenograft animal model. These results suggest that phomaketide A may impair lymphangiogenesis by suppressing VEGFR-3, PKCδ, and eNOS signaling cascades, while simultaneously activating protease inhibitors in human LECs. We document for the first time that phomaketide A inhibits lymphangiogenesis both in vitro and in vivo, which suggests that this natural product could potentially treat cancer metastasis.
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Affiliation(s)
- Huai-Ching Tai
- School of Medicine, Fu-Jen Catholic University, New Taipei City 242, Taiwan.
- Department of Urology, Fu-Jen Catholic University Hospital, New Taipei City 242, Taiwan.
| | - Tzong-Huei Lee
- Institute of Fisheries Science, National Taiwan University, Taipei 106, Taiwan.
| | - Chih-Hsin Tang
- Chinese Medicine Research Center, China Medical University, Taichung 404, Taiwan.
- Department of Pharmacology, School of Medicine, China Medical University, Taichung 404, Taiwan.
- Department of Biotechnology, College of Health Science, Asia University, Taichung 413, Taiwan.
| | - Lei-Po Chen
- Department of Orthopaedics, MacKay Memorial Hospital, Taipei 104, Taiwan.
- Ph.D. Degree Program of Biomedical Science and Engineering, National Chiao Tung University, Hsinchu 300, Taiwan.
| | - Wei-Cheng Chen
- Department of Orthopaedics, MacKay Memorial Hospital, Taipei 104, Taiwan.
- Ph.D. Degree Program of Biomedical Science and Engineering, National Chiao Tung University, Hsinchu 300, Taiwan.
| | - Ming-Shian Lee
- Institute of Fisheries Science, National Taiwan University, Taipei 106, Taiwan.
| | - Pei-Chi Chen
- Department of Medicine, Mackay Medical College, New Taipei City 252, Taiwan.
| | - Chih-Yang Lin
- Department of Medicine, Mackay Medical College, New Taipei City 252, Taiwan.
| | - Chih-Wen Chi
- Department of Medical Research, MacKay Memorial Hospital, New Taipei City 251, Taiwan.
| | - Yu-Jen Chen
- Department of Medical Research, MacKay Memorial Hospital, New Taipei City 251, Taiwan.
- Department of Radiation Oncology, MacKay Memorial Hospital, Taipei 104, Taiwan.
| | - Cheng-Ta Lai
- Division of Colon and Rectal Surgery, Department of Surgery, MacKay Memorial Hospital, Taipei 104, Taiwan.
| | - Shiou-Sheng Chen
- Division of Urology, Taipei City Hospital HepingFuyou Branch, Taipei 100, Taiwan.
- Commission for General Education, National United University, Miaoli 360, Taiwan.
| | - Kuang-Wen Liao
- Ph.D. Degree Program of Biomedical Science and Engineering, National Chiao Tung University, Hsinchu 300, Taiwan.
- Institute of Molecular Medicine and Bioengineering, National Chiao Tung University, Hsinchu 300, Taiwan.
- Department of Biotechnology and Bioindustry Sciences, National Cheng Kung University, Tainan 300, Taiwan.
| | - Chien-Hsing Lee
- Department of Pharmacology, Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan.
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 807, Taiwan.
| | - Shih-Wei Wang
- Department of Medicine, Mackay Medical College, New Taipei City 252, Taiwan.
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 807, Taiwan.
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18
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Chen WK, Chen CA, Chi CW, Li LH, Lin CP, Shieh HR, Hsu ML, Ko CC, Hwang JJ, Chen YJ. Moscatilin Inhibits Growth of Human Esophageal Cancer Xenograft and Sensitizes Cancer Cells to Radiotherapy. J Clin Med 2019; 8:jcm8020187. [PMID: 30764514 PMCID: PMC6406854 DOI: 10.3390/jcm8020187] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [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: 12/17/2018] [Revised: 01/20/2019] [Accepted: 01/28/2019] [Indexed: 01/27/2023] Open
Abstract
Esophageal cancer prognosis remains poor in current clinical practice. We previously reported that moscatilin can induce apoptosis and mitotic catastrophe in esophageal cancer cells, accompanied by upregulation of polo-like kinase 1 (Plk1) expression. We aimed to validate in vitro activity and Plk1 expression in vivo following moscatilin treatment and to examine the treatment's radiosensitizing effect. Human esophageal cancer cells were implanted in nude mice. Moscatilin was intraperitoneally (i.p.) injected into the mice. Tumor size, body weight, white blood cell counts, and liver and renal function were measured. Aberrant mitosis and Plk1 expression were assessed. Colony formation was used to measure survival fraction after radiation. Moscatilin significantly suppressed tumor growth in mice bearing human esophageal xenografts without affecting body weight, white blood cell counts, or liver and renal function. Moscatilin also induced aberrant mitosis and apoptosis. Plk1 expression was markedly upregulated in vivo. Moreover, moscatilin pretreatment enhanced CE81T/VGH and BE3 cell radioresponse in vitro. Moscatilin may inhibit growth of human esophageal tumors and sensitize esophageal cancer cells to radiation therapy.
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Affiliation(s)
- Wun-Ke Chen
- Department of Radiation Oncology, Hsinchu MacKay Memorial Hospital, Hsinchu 30071, Taiwan.
- Department of Biomedical Imaging and Radiological Sciences, National Yang-Ming University, Taipei 11221, Taiwan.
| | - Chien-An Chen
- Department of Radiation Oncology in Zhongxing Branch, Taipei City Hospital, Taipei 10341, Taiwan.
| | - Chih-Wen Chi
- Department of Medical Research, MacKay Memorial Hospital, New Taipei City 25160, Taiwan.
- Department of Nursing, MacKay Medical College, New Taipei City 25245, Taiwan.
| | - Li-Hui Li
- Department of Medical Research, MacKay Memorial Hospital, New Taipei City 25160, Taiwan.
| | - Chin-Ping Lin
- Department of Medical Research, MacKay Memorial Hospital, New Taipei City 25160, Taiwan.
| | - Hui-Ru Shieh
- Department of Medical Research, MacKay Memorial Hospital, New Taipei City 25160, Taiwan.
| | - Ming-Ling Hsu
- Department of Medical Research, MacKay Memorial Hospital, New Taipei City 25160, Taiwan.
| | - Chun-Chuan Ko
- Department of Medical Research, MacKay Memorial Hospital, New Taipei City 25160, Taiwan.
| | - Jeng-Jong Hwang
- Department of Biomedical Imaging and Radiological Sciences, National Yang-Ming University, Taipei 11221, Taiwan.
| | - Yu-Jen Chen
- Department of Medical Research, MacKay Memorial Hospital, New Taipei City 25160, Taiwan.
- Department of Medical Research, China Medical University Hospital, Taichung 40402, Taiwan.
- Department of Radiation Oncology, MacKay Memorial Hospital, Taipei 10449, Taiwan.
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19
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Su NW, Wu SH, Chi CW, Tsai TH, Chen YJ. Cordycepin, isolated from medicinal fungus Cordyceps sinensis, enhances radiosensitivity of oral cancer associated with modulation of DNA damage repair. Food Chem Toxicol 2018; 124:400-410. [PMID: 30576710 DOI: 10.1016/j.fct.2018.12.025] [Citation(s) in RCA: 12] [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: 10/30/2018] [Revised: 12/08/2018] [Accepted: 12/17/2018] [Indexed: 01/17/2023]
Abstract
Concurrent chemotherapy and radiotherapy (RT) is important for controlling oral squamous cell carcinoma (OSCC), which is often accompanied by significant acute and late toxicities. We investigated whether cordycepin, a small molecule extracted from Cordyceps sinensis, could enhance the radiosensitivity of oral cancer cells. Using colony formation assay, we demonstrated that cordycepin induces radiosensitizing effects on two OSCC cells. DNA histogram analysis showed that cordycepin combined with RT prolonged the RT-induced G2/M phase arrest. It protracted the duration of DNA double strand breaks, which was detected by immunofluorescent staining of phosphorylated histone H2AX (γ-H2AX). The underlying molecular mechanism might involve the downregulation of protein expression related to DNA damage repair, including phosphorylated ataxia-telangiectasia mutated (p-ATM) and phosphorylated checkpoint kinase 2. Reciprocal upregulation of phosphorylated checkpoint kinase 1 (Chk1) expression was noted, and the radiosensitizing effect of cordycepin could be further augmented by Chk1 mRNA knockdown, indicating a compensatory DNA repair machinery involving phosphorylation of Chk1. In vivo, the combination of cordycepin and RT exhibited greater growth inhibition on xenografts and stronger apoptosis induction than RT alone, without exacerbating major toxicities. In conclusion, cordycepin increased the radiosensitivity of OSCC cells, which is associated with the modulation of RT-induced DNA damage repair machinery.
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Affiliation(s)
- Nai-Wen Su
- Division of Medical Oncology and Hematology, Department of Internal Medicine, MacKay Memorial Hospital, Taipei, 11094, Taiwan; Institute of Tradition Medicine, School of Medicine, National Yang-Ming University, Taipei, 11221, Taiwan
| | - Shu-Hua Wu
- Department of Medical Research, MacKay Memorial Hospital, Taipei, 25160, Taiwan
| | - Chih-Wen Chi
- Department of Medical Research, MacKay Memorial Hospital, Taipei, 25160, Taiwan
| | - Tung-Hu Tsai
- Institute of Tradition Medicine, School of Medicine, National Yang-Ming University, Taipei, 11221, Taiwan; Department of Chemical Engineering, National United University, Miaoli, 36063, Taiwan.
| | - Yu-Jen Chen
- Institute of Tradition Medicine, School of Medicine, National Yang-Ming University, Taipei, 11221, Taiwan; Department of Medical Research, MacKay Memorial Hospital, Taipei, 25160, Taiwan; Department of Radiation Oncology, MacKay Memorial Hospital, Taipei, 25160, Taiwan; Research Center for Chinese Medicine and Acupuncture, China Medical University, Taichung, 40402, Taiwan; Department of Medical Research, China Medical University Hospital, Taichung, 40402, Taiwan.
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Abstract
The aim of this study was to examine the effect of the level-1 Yo-Yo intermittent recovery test (YYIRT1) on polarization of macrophages in young football players.Fourteen male football players (19.9 ± 1.4 years old) were enrolled in this study. YYIRT1 was performed with 20-meter shuttle runs at increasing speeds and 10-second active recovery in a 5-meter distance between runs till exhaustion. Fasting blood samples were collected before and immediately after YYIRT1. Analysis for macrophage polarization by flow cytometry, reactive oxygen species (ROS) by flow cytometry, biochemical parameters by chemical reactions, and serum cytokines by ELISA were performed. The rating of perceived exertion (RPE) and cardiovascular parameters were recorded.The time to exhaustion was 714.1 ± 114.4 seconds. The oxygen uptake ((Equation is included in full-text article.)) was 48.7 ± 5.6 mL/min/kg, RPE scale was 19 ± 1, resting heart rate and maximal heart rate were 64.9 ± 8.8 beat/min and 181.9 ± 9.3 beat/min, respectively, indicating a high level of cardiopulmonary fitness. The expression of macrophage-specific CD14 and M1 marker HLA-ABC, but not M2 marker CD206, was down-regulated after YYIRT1. The intracellular ROS levels in macrophages had no significant change. In biochemical profile, the serum levels of lactic dehydrogenase (LDH), a marker of muscle damage, increased after YYIRT1 whereas no significant alteration was noted in creatine phosphokinase (CPK), blood urine nitrogen, creatinine, aspartate transaminase (AST), alanine transaminase (ALT), and C-reactive protein. The serum levels of interleukin (IL)-6, IL-10 and tumor necrosis factor (TNF)-α had no significant change.The YYIRT1 may induce muscle damage accompanied by modulation of macrophage polarization toward suppression of M1 phenotype in young football players.
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Affiliation(s)
- Chen-Jan Chiu
- Graduate Institute of Sport Coaching Science, Chinese Culture University, Taipei
| | - Chih-Wen Chi
- Department of Medical Research, Mackay Memorial Hospital, New Taipei City
| | - Hui-Ru Hsieh
- Department of Medical Research, Mackay Memorial Hospital, New Taipei City
| | - Yu-Chuen Huang
- Department of Chinese Medicine
- Department of Medical Research, China Medical University Hospital, Taichung
| | - Huey-June Wu
- Graduate Institute of Sport Coaching Science, Chinese Culture University, Taipei
| | - Yu-Jen Chen
- Department of Radiation Oncology, Mackay Memorial Hospital, Taipei
- Department of Chinese Medicine, China Medical University Hospital, Taichung, Taiwan
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21
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Lee MJ, Tseng WS, Lai JCY, Shieh HR, Chi CW, Chen YJ. Differential Pharmacological Activities of Oxygen Numbers on the Sulfoxide Moiety of Wasabi Compound 6-(Methylsulfinyl) Hexyl Isothiocyanate in Human Oral Cancer Cells. Molecules 2018; 23:E2427. [PMID: 30248933 PMCID: PMC6222327 DOI: 10.3390/molecules23102427] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 09/15/2018] [Accepted: 09/19/2018] [Indexed: 02/07/2023] Open
Abstract
6-(methylsulfinyl) hexyl isothiocyanate (6-MITC) is a naturally occurring compound isolated from Wasabia japonica (wasabi). The synthetic derivatives, 6-(methylsulfenyl) hexyl isothiocyanate (I7447) and 6-(methylsulfonyl) hexyl isothiocyanate (I7557), were derived from 6-MITC with the deletion and addition of oxygen, respectively. We aimed to evaluate the effect of these synthetic compounds on human oral cancer cells, SAS and OECM-1. All three compounds (I7447, 6-MITC, and I7557) inhibited the viability of SAS and OECM-1 cells using MTT assay. Morphological observations showed various proportions of mitotic arrest and apoptosis in cells treated with these compounds. Cell cycle analysis revealed relatively abundant G2/M arrest in 6-MITC and I7557-treated cells, whereas sub-G1 accumulation was found in I7447-treated cells. In using phosphorylated histone H3 as a marker for mitosis, the addition of 6-MITC and I7557 (excluding I7447) could be shown to arrest cells during mitosis. In contrast, I7447 induced more prominent apoptosis than the 6-MITC or I7557 compounds. The down-regulated expression of the phosphorylated form of CHK1 and Cdc25c was noted in 6-MITC and I7557-treated cells. I7557 could sensitize SAS cells to death by radiation. The wasabi compound, 6-MITC, and its chemical derivatives with different numbers of oxygen may have differential pharmacological effects on human oral cancer cells.
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Affiliation(s)
- Min-Ju Lee
- Taipei First Girls High School, Taipei 10045, Taiwan.
| | - Wen-Ser Tseng
- Department of Medical Research, MacKay Memorial Hospital, New Taipei City 25160, Taiwan.
| | - Jerry Cheng-Yen Lai
- Department of Medical Research, Taitung MacKay Memorial Hospital, Taitung City 95054, Taiwan.
| | - Hui-Ru Shieh
- Department of Medical Research, MacKay Memorial Hospital, New Taipei City 25160, Taiwan.
| | - Chih-Wen Chi
- Department of Medical Research, MacKay Memorial Hospital, New Taipei City 25160, Taiwan.
- Department of Nursing, MacKay Medical College, New Taipei City 25245, Taiwan.
| | - Yu-Jen Chen
- Department of Medical Research, MacKay Memorial Hospital, New Taipei City 25160, Taiwan.
- Department of Medical Research, China Medical University Hospital, Taichung 40402, Taiwan.
- Department of Radiation Oncology, MacKay Memorial Hospital, Taipei 10449, Taiwan.
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22
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Chen ST, Lee TY, Tsai TH, Huang YC, Lin YC, Lin CP, Shieh HR, Hsu ML, Chi CW, Lee MC, Chang HH, Chen YJ. Traditional Chinese medicine Danggui Buxue Tang inhibits colorectal cancer growth through induction of autophagic cell death. Oncotarget 2017; 8:88563-88574. [PMID: 29179457 PMCID: PMC5687627 DOI: 10.18632/oncotarget.19902] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Accepted: 07/12/2017] [Indexed: 12/14/2022] Open
Abstract
Purpose The induction of autophagic cell death is an important process in the development of anticancer therapeutics. We aimed to evaluate the activity of the ancient Chinese decoction Danggui Buxue Tang (DBT) against colorectal cancer (CRC) and the associated autophagy-related mechanism. Materials and methods CT26 CRC cells were implanted into syngeneic BALB/c mice for the tumor growth assay. DBT extracts and DBT-PD (polysaccharide-depleted) fractions were orally administered. The toxicity profiles of the extracts were analyzed using measurements of body weight, hemogram, and biochemical parameters. The morphology of tissue sections was observed using light and transmission electron microscopy. Western blotting and small interference RNA assays were used to determine the mechanism. Results DBT-PD and DBT, which contained an equal amount of DBT-PD, inhibited CT26 syngeneic tumor growth. In the tumor specimen, the expression of microtubule-associated proteins 1A/1B light chain 3B (LC3B) was upregulated by DBT-PD and DBT. The development of autophagosomes was observed via transmission electron microscopy in tumors treated with DBT-PD and DBT. In vitro experiments for mechanism clarification demonstrated that DBT-PD could induce autophagic death in CT26 cells accompanied by LC3B lipidation, downregulation of phospho-p70s6k, and upregulation of Atg7. RNA interference of Atg7, but not Atg5, partially reversed the effect of DBT-PD on LC3B lipidation and expression of phospho-p70s6k and Atg7. The changes in ultrastructural morphology and LC3B expression induced by DBT-PD were also partially blocked by the knockdown of Atg7 mRNA. Conclusion DBT induced autophagic death of colorectal cancer cells through the upregulation of Atg7 and modulation of the mTOR/p70s6k signaling pathway.
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Affiliation(s)
- Shun-Ting Chen
- Department of Chinese Medicine, Taipei Buddhist Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City 23142, Taiwan.,Graduate Institute of Traditional Chinese Medicine, School of Chinese Medicine, College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan.,Graduate Institute of Clinical Medical Science, College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan
| | - Tzung-Yan Lee
- Graduate Institute of Traditional Chinese Medicine, School of Chinese Medicine, College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan
| | - Tung-Hu Tsai
- Institute of Traditional Medicine, School of Medicine, National Yang-Ming University, Taipei 11221, Taiwan.,Depatment of Chemical Engineering, National United University, Miaoli 36003, Taiwan
| | - Yu-Chuen Huang
- School of Chinese Medicine, China Medical University, Taichung 40402, Taiwan.,Department of Medical Research, China Medical University Hospital, Taichung 40402, Taiwan
| | - Yin-Cheng Lin
- Department of Medical Research, Mackay Memorial Hospital, New Taipei City 25160, Taiwan
| | - Chin-Ping Lin
- Department of Medical Research, Mackay Memorial Hospital, New Taipei City 25160, Taiwan
| | - Hui-Ru Shieh
- Department of Medical Research, Mackay Memorial Hospital, New Taipei City 25160, Taiwan
| | - Ming-Ling Hsu
- Department of Medical Research, Mackay Memorial Hospital, New Taipei City 25160, Taiwan
| | - Chih-Wen Chi
- Department of Medical Research, Mackay Memorial Hospital, New Taipei City 25160, Taiwan
| | - Ming-Cheng Lee
- Department of Research, Taipei Buddhist Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City 23141, Taiwan
| | - Hen-Hong Chang
- School of Post-Baccalaureate Chinese Medicine, College of Chinese Medicine, and Research Center for Chinese Medicine and Acupuncture, China Medical University, Taichung 40402, Taiwan.,Department of Chinese Medicine, China Medical University Hospital, Taichung 40402, Taiwan
| | - Yu-Jen Chen
- Department of Medical Research, China Medical University Hospital, Taichung 40402, Taiwan .,Department of Medical Research, Mackay Memorial Hospital, New Taipei City 25160, Taiwan.,Department of Radiation Oncology, Mackay Memorial Hospital, Taipei 10449, Taiwan
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23
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Su NW, Wu SH, Chi CW, Liu CJ, Tsai TH, Chen YJ. Metronomic Cordycepin Therapy Prolongs Survival of Oral Cancer-Bearing Mice and Inhibits Epithelial-Mesenchymal Transition. Molecules 2017; 22:E629. [PMID: 28406456 PMCID: PMC6154290 DOI: 10.3390/molecules22040629] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Revised: 04/06/2017] [Accepted: 04/10/2017] [Indexed: 12/18/2022] Open
Abstract
Cordycepin (3'-deoxyadenosine) is a natural compound abundantly found in Cordyceps sinesis in natural and fermented sources. In this study, we examined the effects of cordycepin in a human oral squamous cell carcinoma (OSCC) xenograft model. Cordycepin was administered in a regular, low-dose and prolonged schedule metronomic therapy. Two doses of cordycepin (25 mg/kg, 50 mg/kg) were administrated five days a week for eight consecutive weeks. The tumor volumes were reduced and survival time was significantly prolonged from 30.3 ± 0.9 days (control group) to 56 days (50 mg/kg group, the day of tumor-bearing mice were sacrificed for welfare consideration). The weights of mice did not change and liver, renal, and hematologic functions were not compromised. Cordycepin inhibited the OSCC cell viability in vitro (IC50 122.4-125.2 μM). Furthermore, morphological characteristics of apoptosis, increased caspase-3 activity and G2/M cell cycle arrest were observed. In wound healing assay, cordycepin restrained the OSCC cell migration. Cordycepin upregulated E-cadherin and downregulated N-cadherin protein expression, implying inhibition of epithelial-mesenchymal transition (EMT). The immunohistochemical staining of xenograft tumor with E-cadherin and vimentin validated in vitro results. In conclusion, metronomic cordycepin therapy showed effective tumor control, prolonged survival and low toxicities. Cytotoxicity against cancer cells with apoptotic features and EMT inhibition were observed.
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Affiliation(s)
- Nai-Wen Su
- Division of Medical Oncology and Hematology, Department of Internal Medicine, Mackay Memorial Hospital, Taipei 11094, Taiwan.
- Institute of Traditional Medicine, School of Medicine, National Yang-Ming University, Taipei 11221, Taiwan.
| | - Shu-Hua Wu
- Department of Medical Research, Mackay Memorial Hospital, Taipei 25160, Taiwan.
| | - Chih-Wen Chi
- Department of Medical Research, Mackay Memorial Hospital, Taipei 25160, Taiwan.
| | - Chung-Ji Liu
- Department of Oral and Maxillofacial Surgery, Mackay Memorial Hospital, Taipei 11094, Taiwan.
- Institute of Oral Biology, School of Dentistry, National Yang-Ming University, Taipei 11221, Taiwan.
| | - Tung-Hu Tsai
- Institute of Traditional Medicine, School of Medicine, National Yang-Ming University, Taipei 11221, Taiwan.
- Department of Chemical Engineering, National United University, Miaoli 36063, Taiwan.
| | - Yu-Jen Chen
- Institute of Traditional Medicine, School of Medicine, National Yang-Ming University, Taipei 11221, Taiwan.
- Department of Medical Research, Mackay Memorial Hospital, Taipei 25160, Taiwan.
- Department of Radiation Oncology, Mackay Memorial Hospital, Taipei 25160, Taiwan.
- Research Center for Chinese Medicine and Acupuncture, China Medical University, Taichung 404, Taiwan.
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Fang CH, Liang HB, Chi CW, Tao HS, Fang C, Zhu W, Mo ZK, Yang J, Xiang N, Zeng N, Tian J. [Application of indocyanine green-fluorescent imaging technique in planning resection line and real-time surgical navigation in small hepatocellular carcinoma]. Zhonghua Wai Ke Za Zhi 2017; 54:444-450. [PMID: 27938579 DOI: 10.3760/cma.j.issn.0529-5815.2016.06.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore the value of near-infrared technology guided by indolecyanine green(ICG) in planning resection line and real-time surgical navigation in small liver cancer. Methods: From March to September 2015, 11 patients with hepatic tumors received hepatectomy were treated in First Department of Hepatobiliary Surgery, Zhujiang Hospital, Southern Medical University.There were 5 male and 6 female patients with average age of (55±10)years (range 39-70 years). Among whom, there were 9 cases with hepatocellular carcinoma and 2 cases with colorectal cancer. A near-infrared light camera system was used to detect the liver surfaces before resection, and to plan resection line and surgical specimens. A student's t test was used to compare continuous parametric variables. Results: The ICG-fluorescent imaging and histological examination had been used in the 15 lesions of the 11 patients. Among the 15 lesions, 7 lesions were detected by visual inspections, palpation and ICG-fluorescent imaging, 6 lesions were identified only by ICG-fluorescent imaging, 2 lesions were detected only by ICG-fluorescent imaging after resection.Results of pathologic examination indicated that the total fluorescent type include 5 well differentiated hepatocellular carcinoma and 2 cirrhotic nodule; the partial fluorescent type include 3 moderately differentiated hepatocellular carcinomas and 1 well differentiated hepatocellular carcinomas; the rim fluorescent type included 2 liver metastatic carcinoma and 2 poorly differentiated hepatocellular carcinomas. The average diameter of the tumor size measured by CT was (1.7±0.2)cm, while the average diameter measured by ICG-fluorescent imaging was (1.7±0.3)cm(t=-0.188, P>0.05). Conclusion: Near-infrared technology guided by ICG has important value in planning resection line and real-time surgical navigation in small liver cancer.
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Affiliation(s)
- C H Fang
- First Department of Hepatobiliary Surgery, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, China
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Chi CW, Lai EHH, Liu CY, Lin CP, Shin CS. Influence of heat treatment on cyclic fatigue and cutting efficiency of ProTaper Universal F2 instruments. J Dent Sci 2017; 12:21-26. [PMID: 30895019 PMCID: PMC6395258 DOI: 10.1016/j.jds.2016.06.001] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Revised: 06/06/2016] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND/PURPOSE Heat pretreatment can improve the cyclic fatigue life of nickel-titanium (NiTi) instruments. This study evaluated the effects of two different heat treatments on the cyclic fatigue resistance and cutting efficiency of ProTaper Universal F2 files. MATERIALS AND METHODS The files were divided into three groups: no treatment (control), heat treatment at 400°C (HT400) and heat treatment at 600°C (HT600). The phase transformation of the files was evaluated by differential scanning calorimetry. In cyclic fatigue tests, the differences in file performance in four simulated canals among the three groups were assessed. The cutting efficiency was tested at four cutting portions (3 mm, 6 mm, 9 mm, and 12 mm) from the tip of the file. RESULTS Differential scanning calorimetry showed a prolonged phase transformation of the files only after 600°C treatment. At 3 mm cutting portion, 400°C heat-treated files had significantly better cutting ability than those in the control group. However, the files in the HT600 group had significantly lower cutting efficiency than those in the other two groups at the four tested positions. In the cyclic fatigue test, fatigue lives of the files after 400°C and 600°C treatment were prolonged from 2.1 to 2.8 times and from 1.7 to 5.5 times, respectively. CONCLUSION Although 600°C treatment increased resistance to cyclic fatigue, it reduced the cutting efficiency of the files. The 400°C treatment maintained the cutting ability and prolonged the cyclic fatigue life of the files. Therefore, for clinical use of ProTaper Universal F2 files, 400°C pretreatment is a better choice than 600°C pretreatment.
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Affiliation(s)
- Chih-Wen Chi
- Graduate Institute of Clinical Dentistry, School of Dentistry and National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Eddie Hsiang-Hua Lai
- Graduate Institute of Clinical Dentistry, School of Dentistry and National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Chao-Yuan Liu
- Institute of Applied Mechanics, National Taiwan University, Taipei, Taiwan
| | - Chun-Pin Lin
- Graduate Institute of Clinical Dentistry, School of Dentistry and National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan.,School of Dentistry, China Medical University and China Medical University Hospital, Taichung, Taiwan
| | - Chow-Shing Shin
- Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan
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Chen ST, Lee TY, Tsai TH, Lin YC, Lin CP, Shieh HR, Hsu ML, Chi CW, Lee MC, Chang HH, Chen YJ. The Traditional Chinese Medicine DangguiBuxue Tang Sensitizes Colorectal Cancer Cells to Chemoradiotherapy. Molecules 2016; 21:molecules21121677. [PMID: 27929437 PMCID: PMC6273051 DOI: 10.3390/molecules21121677] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Revised: 11/23/2016] [Accepted: 11/30/2016] [Indexed: 12/19/2022] Open
Abstract
Chemotherapy is an important treatment modality for colon cancer, and concurrent chemoradiation therapy (CCRT) is the preferred treatment route for patients with stage II and III rectal cancer. We examined whether DangguiBuxue Tang (DBT), a traditional Chinese herbal extract, sensitizes colorectal cancer cells to anticancer treatments. The polysaccharide-depleted fraction of DBT (DBT-PD) contains greater amounts of astragaloside IV (312.626 µg/g) and ferulic acid (1.404 µg/g) than does the original formula. Treatment of the murine colon carcinoma cell line (CT26) with DBT-PD inhibits growth, whereas treatment with comparable amounts of purified astragaloside IV and ferulic acid showed no significant effect. Concurrent treatment with DBT-PD increases the growth inhibitory effect of 5-fluorouracil up to 4.39-fold. DBT-PD enhances the effect of radiation therapy (RT) with a sensitizer enhancement ratio (SER) of up to 1.3. It also increases the therapeutic effect of CCRT on CT26 cells. Cells treated with DBP-PD showed ultrastructural changes characteristic of autophagy, including multiple cytoplasmic vacuoles with double-layered membranes, vacuoles containing remnants of degraded organelles, marked swelling and vacuolization of mitochondria, and autolysosome-like vacuoles. We conclude that DBT-PD induces autophagy-associated cell death in CT26 cells, and may have potential as a chemotherapy or radiotherapy sensitizer in colorectal cancer treatment.
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Affiliation(s)
- Shun-Ting Chen
- Department of Chinese Medicine, Buddhist Tzu Chi General Hospital, Taipei Branch, New Taipei City 23142, Taiwan.
- Graduate Institute of Traditional Chinese Medicine, School of Chinese Medicine, College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan.
- Graduate Institute of Clinical Medical Science, College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan.
| | - Tzung-Yan Lee
- Graduate Institute of Traditional Chinese Medicine, School of Chinese Medicine, College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan.
| | - Tung-Hu Tsai
- Institute of Traditional Medicine, School of Medicine, National Yang-Ming University, Taipei 11221, Taiwan.
| | - Yin-Cheng Lin
- Department of Medical Research, Mackay Memorial Hospital, Taipei 25160, Taiwan.
| | - Chin-Ping Lin
- Department of Medical Research, Mackay Memorial Hospital, Taipei 25160, Taiwan.
| | - Hui-Ru Shieh
- Department of Medical Research, Mackay Memorial Hospital, Taipei 25160, Taiwan.
| | - Ming-Ling Hsu
- Department of Medical Research, Mackay Memorial Hospital, Taipei 25160, Taiwan.
| | - Chih-Wen Chi
- Department of Medical Research, Mackay Memorial Hospital, Taipei 25160, Taiwan.
| | - Ming-Cheng Lee
- Department of Research, Buddhist Tzu Chi General Hospital, Taipei Branch, New Taipei City 23141, Taiwan.
| | - Hen-Hong Chang
- School of Post-Baccalaureate Chinese Medicine, and Research Center for Chinese Medicine and Acupuncture, China Medical University, Taichung 40402, Taiwan.
- Department of Chinese Medicine, China Medical University Hospital, Taichung 40402, Taiwan.
| | - Yu-Jen Chen
- Department of Medical Research, Mackay Memorial Hospital, Taipei 25160, Taiwan.
- Department of Chinese Medicine, China Medical University Hospital, Taichung 40402, Taiwan.
- Department of Radiation Oncology, Mackay Memorial Hospital, Taipei 25160, Taiwan.
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Chi CW, Deng YL, Lee JW, Lin CP. Fracture resistance of dental nickel-titanium rotary instruments with novel surface treatment: Thin film metallic glass coating. J Formos Med Assoc 2016; 116:373-379. [PMID: 27502895 DOI: 10.1016/j.jfma.2016.07.003] [Citation(s) in RCA: 8] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2016] [Accepted: 07/05/2016] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND/PURPOSE Dental nickel-titanium (NiTi) rotary instruments are widely used in endodontic therapy because they are efficient with a higher success rate. However, an unpredictable fracture of instruments may happen due to the surface characteristics of imperfection (or irregularity). This study assessed whether a novel surface treatment could increase fatigue fracture resistance of dental NiTi rotary instruments. METHODS A 200- or 500-nm thick Ti-zirconium-boron (Ti-Zr-B) thin film metallic glass was deposited on ProTaper Universal F2 files using a physical vapor deposition process. The characteristics of coating were analyzed by scanning electron microscopy, transmission electron microscopy, and X-ray diffractometry. In cyclic fatigue tests, the files were performed in a simulated root canal (radius=5 mm, angulation=60°) under a rotating speed of 300rpm. The fatigue fractured cross sections of the files were analyzed with their fractographic performances through scanning electron microscopy images. RESULTS The amorphous structure of the Ti-Zr-B coating was confirmed by transmission electron microscopy and X-ray diffractometry. The surface of treated files presented smooth morphologies without grinding irregularity. For the 200- and 500-nm surface treatment groups, the coated files exhibited higher resistance of cyclic fatigue than untreated files. In fractographic analysis, treated files showed significantly larger crack-initiation zone; however, no significant differences in the areas of fatigue propagation and catastrophic fracture were found compared to untreated files. CONCLUSION The novel surface treatment of Ti-Zr-B thin film metallic glass on dental NiTi rotary files can effectively improve the fatigue fracture resistance by offering a smooth coated surface with amorphous microstructure.
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Affiliation(s)
- Chih-Wen Chi
- Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University, Taipei City, Taiwan; National Taiwan University Hospital Hsin-Chu Branch, College of Medicine, National Taiwan University, Hsin-Chu, Taiwan
| | - Yu-Lun Deng
- Department of Materials Engineering, Ming Chi University of Technology, New Taipei City, Taiwan
| | - Jyh-Wei Lee
- Department of Materials Engineering, Ming Chi University of Technology, New Taipei City, Taiwan; Center for Thin Films Technologies and Applications, Ming Chi University of Technology, New Taipei, Taiwan; College of Engineering, Chang Gung University, Taoyuan, Taiwan.
| | - Chun-Pin Lin
- Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University, Taipei City, Taiwan; National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan; School of Dentistry, China Medical University and China Medical University Hospital, Taichung, Taiwan.
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Chi CW, Li CC, Lin CP, Shin CS. Cyclic fatigue behavior of nickel-titanium dental rotary files in clinical simulated root canals. J Formos Med Assoc 2016; 116:306-312. [PMID: 27375047 DOI: 10.1016/j.jfma.2016.06.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Accepted: 06/03/2016] [Indexed: 10/21/2022] Open
Abstract
BACKGROUND/PURPOSE Dental rotary instruments can be applied in multiple conditions of canals, but unpredictable fatigue fracture may happen. This study evaluated the fatigue lives of two batches of nickel-titanium (NiTi) dental rotary files operating in clinically simulated root canals. METHODS Single-step cyclic fatigue tests were carried out to assess the performance of two batches of NiTi files (ProTaper and ProFile) in nine combinations of simulated canals (cylinder radii 5 mm, 7.5 mm, and 10 mm, and insertion angles 20°, 40°, and 60°). Two-step cyclic fatigue tests were carried out in simulated root canals with the same radius by using the following two sets of insertion angles: (20°, 40°), (20°, 60°), (40°, 20°), and (60°, 20°). Fracture surfaces were observed by scanning electron microscopy. RESULTS The single-step cyclic fatigue results showed that cyclic fatigue lives of the files decreased with increasing insertion angles or decreasing cylinder radius. The ProFile #25 .04 file was more fatigue resistant than the ProTaper F2 file. In two-step cyclic fatigue tests, the total fatigue lives were usually more than 100% when the files operated at a lower strain and then at a higher strain. By scanning electron microscopy, a larger area of fatigue striation corresponded to a longer fatigue life. CONCLUSION Cyclic fatigue life can be influenced by the strains and geometries of files. The fatigue life was prolonged when the files operated at a lower strain and then at a higher strain. However, the fatigue life was shortened if the loading sequence was reversed.
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Affiliation(s)
- Chih-Wen Chi
- Graduate Institute of Clinical Dentistry, School of Dentistry and National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Chun-Chieh Li
- Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan
| | - Chun-Pin Lin
- Graduate Institute of Clinical Dentistry, School of Dentistry and National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Chow-Shing Shin
- Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan.
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Lai YW, Wang SW, Chang CH, Liu SC, Chen YJ, Chi CW, Chiu LP, Chen SS, Chiu AW, Chung CH. Butein inhibits metastatic behavior in mouse melanoma cells through VEGF expression and translation-dependent signaling pathway regulation. Altern Ther Health Med 2015; 15:445. [PMID: 26694191 PMCID: PMC4687249 DOI: 10.1186/s12906-015-0970-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2015] [Accepted: 12/14/2015] [Indexed: 12/31/2022]
Abstract
Background Melanoma is an aggressive skin cancer and a predominant cause of skin cancer-related deaths. A previous study has demonstrated the ability of butein to inhibit tumor proliferation and invasion. However, the anti-metastatic mechanisms and in vivo effects of butein have not been fully elucidated. Methods MTT cell viability assays were used to evaluate the antitumor effects of butein in vitro. Cytotoxic effects of butein were measured by lactate dehydrogenase assay. Anti-migratory effects of butein were evaluated by two-dimensional scratch and transwell migration assays. Signaling transduction and VEGF-releasing assays were measured by Western blotting and ELISA. We also conducted an experimental analysis of the metastatic potential of tumor cells injected into the tail vein of C57BL/6 mice. Results We first demonstrated the effect of butein on cell viability at non-cytotoxic concentrations (1, 3, and 10 μM). In vitro, butein was found to inhibit the migration of B16F10 cells in a concentration-dependent manner using transwell and scratch assays. Butein had a dose-dependent effect on focal adhesion kinase, Akt, and ERK phosphorylation in B16F10 cells. Butein efficiently inhibited the mTOR/p70S6K translational inhibition machinery and decreased the production of VEGF in B16F10 cells. Furthermore, the in vivo antitumor effects of butein were demonstrated using a pulmonary metastasis model. Conclusion The results of the present study indicate the potential utility of butein in the treatment of melanoma.
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Chang CH, Liu SY, Chi CW, Yu HL, Chang TJ, Tsai TH, Lee TW, Chen YJ. External beam radiotherapy synergizes ¹⁸⁸Re-liposome against human esophageal cancer xenograft and modulates ¹⁸⁸Re-liposome pharmacokinetics. Int J Nanomedicine 2015; 10:3641-9. [PMID: 26056445 PMCID: PMC4447003 DOI: 10.2147/ijn.s80302] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
External beam radiotherapy (EBRT) treats gross tumors and local microscopic diseases. Radionuclide therapy by radioisotopes can eradicate tumors systemically. Rhenium 188 ((188)Re)-liposome, a nanoparticle undergoing clinical trials, emits gamma rays for imaging validation and beta rays for therapy, with biodistribution profiles preferential to tumors. We designed a combinatory treatment and examined its effects on human esophageal cancer xenografts, a malignancy with potential treatment resistance and poor prognosis. Human esophageal cancer cell lines BE-3 (adenocarcinoma) and CE81T/VGH (squamous cell carcinoma) were implanted and compared. The radiochemical purity of (188)Re-liposome exceeded 95%. Molecular imaging by NanoSPECT/CT showed that BE-3, but not CE81T/VGH, xenografts could uptake the (188)Re-liposome. The combination of EBRT and (188)Re-liposome inhibited tumor regrowth greater than each treatment alone, as the tumor growth inhibition rate was 30% with EBRT, 25% with (188)Re-liposome, and 53% with the combination treatment at 21 days postinjection. Combinatory treatment had no additive adverse effects and significant biological toxicities on white blood cell counts, body weight, or liver and renal functions. EBRT significantly enhanced the excretion of (188)Re-liposome into feces and urine. In conclusion, the combination of EBRT with (188)Re-liposome might be a potential treatment modality for esophageal cancer.
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Affiliation(s)
- Chih-Hsien Chang
- Isotope Application Division, Institute of Nuclear Energy Research, Taoyuan, Taiwan ; Department of Biomedical Imaging and Radiological Sciences, National Yang-Ming University, Taipei, Taiwan
| | - Shin-Yi Liu
- Department of Medical Research MacKay Memorial Hospital, Taipei, Taiwan
| | - Chih-Wen Chi
- Department of Medical Research MacKay Memorial Hospital, Taipei, Taiwan
| | - Hsiang-Lin Yu
- Isotope Application Division, Institute of Nuclear Energy Research, Taoyuan, Taiwan
| | - Tsui-Jung Chang
- Isotope Application Division, Institute of Nuclear Energy Research, Taoyuan, Taiwan
| | - Tung-Hu Tsai
- Institute of Traditional Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Te-Wei Lee
- Isotope Application Division, Institute of Nuclear Energy Research, Taoyuan, Taiwan
| | - Yu-Jen Chen
- Department of Medical Research MacKay Memorial Hospital, Taipei, Taiwan ; Institute of Traditional Medicine, National Yang-Ming University, Taipei, Taiwan ; Department of Radiation Oncology, MacKay Memorial Hospital, Taipei, Taiwan
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Chiang MF, Chen HH, Chi CW, Sze CI, Hsu ML, Shieh HR, Lin CP, Tsai JT, Chen YJ. Modulation of Sonic hedgehog signaling and WW domain containing oxidoreductase WOX1 expression enhances radiosensitivity of human glioblastoma cells. Exp Biol Med (Maywood) 2015; 240:392-9. [PMID: 25595187 DOI: 10.1177/1535370214565989] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
WW domain containing oxidoreductase, designated WWOX, FOR or WOX1, is a known pro-apoptotic factor when ectopically expressed in various types of cancer cells, including glioblastoma multiforme (GBM). The activation of sonic hedgehog (Shh) signaling, especially paracrine Shh secretion in response to radiation, is associated with impairing the effective irradiation of cancer cells. Here, we examined the role of Shh signaling and WOX1 overexpression in the radiosensitivity of human GBM cells. Our results showed that ionizing irradiation (IR) increased the cytoplasmic Shh and nuclear Gli-1 content in GBM U373MG and U87MG cells. GBM cells with exogenous Shh treatment exhibited similar results. Pretreatment with Shh peptides protected U373MG and U87MG cells against IR in a dose-dependent manner. Cyclopamine, a Hedgehog/Smoothened (SMO) inhibitor, reversed the protective effect of Shh in U87MG cells. Cyclopamine increased Shh plus IR-induced H2AX, a marker of DNA double-strand breaks, in these cells. To verify the role of Shh signaling in the radiosensitivity of GBM cells, we tested the effect of the Gli family zinc finger 1 (Gli-1) inhibitor zerumbone and found that it could sensitize GBM cells to IR. We next examined the role of WOX1 in radiosensitivity. Overexpression of WOX1 enhanced the radiosensitivity of U87MG (possessing wild type p53 or WTp53) but not U373MG (harboring mutant p53 or MTp53) cells. Pretreatment with Shh peptides protected both WOX1-overexpressed U373MG and U87MG cells against IR and increased the cytoplasmic Shh and nuclear Gli-1 content. Zerumbone enhanced the radiosensitivity of WOX1-overexpressed U373MG and U87MG cells. In conclusion, overexpression of WOX1 preferentially sensitized human GBM cells possessing wild type p53 to radiation therapy. Blocking of Shh signaling may enhance radiosensitivity independently of the expression of p53 and WOX1. The crosstalk between Shh signaling and WOX1 expression in human glioblastoma warrants further investigation.
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Affiliation(s)
- Ming-Fu Chiang
- Department of Neurosurgery, MacKay Memorial Hospital, Taipei 104, Taiwan Graduate Institute of Injury Prevention and Control, Taipei Medical University, Taipei 110, Taiwan
| | - Hsin-Hong Chen
- Department of Medical Research, MacKay Memorial Hospital, Taipei 104, Taiwan
| | - Chih-Wen Chi
- Department of Medical Research, MacKay Memorial Hospital, Taipei 104, Taiwan
| | - Chun-I Sze
- Department of Cell Biology and Anatomy, National Cheng Kung University, Tainan, Taiwan
| | - Ming-Ling Hsu
- Department of Medical Research, MacKay Memorial Hospital, Taipei 104, Taiwan
| | - Hui-Ru Shieh
- Department of Medical Research, MacKay Memorial Hospital, Taipei 104, Taiwan
| | - Chin-Ping Lin
- Department of Medical Research, MacKay Memorial Hospital, Taipei 104, Taiwan
| | - Jo-Ting Tsai
- Department of Radiation Oncology, Taipei Medical University-Shuang Ho Hospital, Taipei, Taiwan
| | - Yu-Jen Chen
- Graduate Institute of Pharmacology, Taipei Medical University, Taipei 110, Taiwan Department of Radiation Oncology, MacKay Memorial Hospital, Taipei 104, Taiwan
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Chen YJ, Chi CW, Su WC, Huang HL. Lapatinib induces autophagic cell death and inhibits growth of human hepatocellular carcinoma. Oncotarget 2014; 5:4845-54. [PMID: 24947784 PMCID: PMC4148104 DOI: 10.18632/oncotarget.2045] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2014] [Accepted: 05/30/2014] [Indexed: 12/27/2022] Open
Abstract
Lapatinib, an orally administered small-molecule tyrosine kinase inhibitor targeting epidermal growth factor receptors (EGFR) and Her2/Neu, has been widely accepted in the treatment of breast cancer. In this study, we found that lapatinib induced cytotoxicity in human hepatoma Huh7, HepG2 and HA22T cells. For the mode of cell death, we found lapatinib induced a higher percent of dead cells and a lower percent of hypodiploid cells, suggesting non-apoptotic cell death in lapatinib-treated hepatoma cells. Moreover, lapatinib-induced autophagy in hepatoma cells was confirmed by the detection of autophagic LC3-II conversion, the up-regulation of autophagy-related proteins, and the down-regulation of p62 by immunoblotting. Autophagic cell death was demonstrated by images of punctuated LC3 patterns, a higher percent of acridine orange positive cells, as well as a partial rescue of cell death by autophagy inhibitor 3-methyladenine or chloroquine. We also found massive vacuoles in lapatinib-treated hepatoma cells by electronic microscopy. In addition, the shRNA of knocked-down autophagy-related proteins rescued the hepatoma cells from lapatinib-induced growth inhibition. We also demonstrated a reduction of tumorigenesis by lapatinib in vivo. In conclusion, lapatinib induced autophagic cell death and the growth of human hepatoma cells. Our study provides potential cancer therapies by using lapatinib as a treatment for hepatoma.
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Affiliation(s)
- Yu-Jen Chen
- Department of Medical Research Mackay Memorial Hospital, Taipei, Taiwan
- Department of Radiation Oncology, Mackay Memorial Hospital, Taipei, Taiwan
- Institute of Traditional Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan
- Institute of Pharmacology, Taipei Medical University, Taipei, Taiwan
| | - Chih-Wen Chi
- Department of Medical Research Mackay Memorial Hospital, Taipei, Taiwan
| | - Wen-Chi Su
- Research Center for Emerging Viruses, China Medical University Hospital, Taichung, Taiwan
- China Medical University, Taichung, Taiwan
| | - Huey-Lan Huang
- Department of Bioscience Technology, College of Health Science, Chang Jung Christian University, Tainan, Taiwan
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Wang YL, Chang CC, Chi CW, Chang HH, Chiang YC, Chuang YC, Chang HH, Huang GF, Liao YS, Lin CP. Erosive potential of soft drinks on human enamel: an in vitro study. J Formos Med Assoc 2014; 113:850-6. [PMID: 25001324 DOI: 10.1016/j.jfma.2014.06.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Revised: 05/30/2014] [Accepted: 06/03/2014] [Indexed: 10/25/2022] Open
Abstract
BACKGROUND/PURPOSE Most soft drinks are acidic in nature. Regular consumption of these drinks may result in dental erosion. The aim of this in vitro study was to evaluate the erosive potential of different soft drinks in Taiwan by a novel multiple erosive method. METHODS Four commercially available soft drinks in Taiwan were selected for this study. The properties of each product were analyzed to measure their pH, titratable acidity, and ion contents. The erosive potential of the soft drinks was measured based on the amount of loss of human enamel surface following its exposure to the soft drinks tested for different periods (20 minutes, 60 minutes, and 180 minutes). The enamel loss was measured using a confocal laser scanning microscope. RESULTS The pH values of the soft drinks were below the critical pH value (5.5) for enamel demineralization, and ranged from 2.42 to 3.46. The drink with ingredients of citric acid and ascorbic acid had the highest titratable acidity (33.96 mmol OH(-)/L to pH 5.5 and 71.9 mmol OH(-)/L to pH 7). Exposure to all the soft drinks resulted in loss of human enamel surface (7.28-34.07 μm for 180-minute exposure). The beverage with the highest calcium content had the lowest erosive potential. CONCLUSION All tested soft drinks were found to be erosive. Soft drinks with high calcium contents have significantly lower erosive potential. Low pH value and high citrate content may cause more surface enamel loss. As the erosive time increased, the titratable acidity to pH 7 may be a predictor of the erosive potential for acidic soft drinks. The erosive potential of the soft drinks may be predicted based on the types of acid content, pH value, titratable acidity, and ion concentration.
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Affiliation(s)
- Yin-Lin Wang
- School of Dentistry, National Taiwan University, Taipei, Taiwan; Department of Dentistry, National Taiwan University Hospital, National Taiwan University, Taipei, Taiwan; Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University, Taipei, Taiwan
| | - Chia-Chieh Chang
- Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University, Taipei, Taiwan
| | - Chih-Wen Chi
- School of Dentistry, National Taiwan University, Taipei, Taiwan; Department of Dentistry, National Taiwan University Hospital, National Taiwan University, Taipei, Taiwan; Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University, Taipei, Taiwan
| | - Hao-Hueng Chang
- School of Dentistry, National Taiwan University, Taipei, Taiwan; Department of Dentistry, National Taiwan University Hospital, National Taiwan University, Taipei, Taiwan; Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University, Taipei, Taiwan
| | - Yu-Chih Chiang
- School of Dentistry, National Taiwan University, Taipei, Taiwan; Department of Dentistry, National Taiwan University Hospital, National Taiwan University, Taipei, Taiwan; Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University, Taipei, Taiwan
| | - Yueh-Chiao Chuang
- School of Dentistry, National Taiwan University, Taipei, Taiwan; Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University, Taipei, Taiwan
| | - Hsiao-Hua Chang
- School of Dentistry, National Taiwan University, Taipei, Taiwan; Department of Dentistry, National Taiwan University Hospital, National Taiwan University, Taipei, Taiwan; Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University, Taipei, Taiwan
| | - Guay-Fen Huang
- School of Dentistry, National Taiwan University, Taipei, Taiwan; Department of Dentistry, National Taiwan University Hospital, National Taiwan University, Taipei, Taiwan; Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University, Taipei, Taiwan
| | - Yunn-Shiuan Liao
- Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan
| | - Chun-Pin Lin
- School of Dentistry, National Taiwan University, Taipei, Taiwan; Department of Dentistry, National Taiwan University Hospital, National Taiwan University, Taipei, Taiwan; Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University, Taipei, Taiwan.
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Shin CS, Huang YH, Chi CW, Lin CP. Fatigue life enhancement of NiTi rotary endodontic instruments by progressive reciprocating operation. Int Endod J 2014; 47:882-8. [PMID: 24355085 DOI: 10.1111/iej.12233] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Accepted: 12/16/2013] [Indexed: 01/29/2023]
Abstract
AIM To evaluate the effect of reciprocating amplitude and progressive angular increment on fatigue life enhancement of NiTi rotary endodontic instruments. METHODOLOGY ProTaper F2 instruments were operated in steel artificial canals with both stationary reciprocating (SR) and progressive reciprocating (PR) motions. The SR motions involved symmetric to and fro reciprocation of ± 180(o) , ± 135(o) , ± 90(o) , ± 60(o) and ± 45(o) . The PR motions were ± 45(o) stationary motion superimposed with angular increments of 7(o) , 11(o) , 22.5(o) or 31(o) whenever an instrument completed 1, 10 or 30 reciprocating cycles (rc). The fatigue lives were compared with those under continuous rotation (CR) and a reciprocating operation with a forward 144(o) and backward 72(o) motion proposed by Yared (2008). The statistical significance of these operating modes on fatigue life was examined using one way anova and post hoc Tukey's tests at P = 0.05. Fractographic analysis was also applied to probe the fracture mechanisms of different rotation motions. RESULTS Fatigue life increased with decreasing reciprocating amplitude. Operating in the SR increased fatigue life by 355% over that in the CR. Except for the 22.5(o) increment, all PR motions yielded longer fatigue lives than the SR motion. A progressive reciprocating operation with a ± 45(o) reciprocating amplitude and a + 7(o) progressive angular increment every 10 reciprocating cycles (± 45(o) /10rc/+7(o) ) increased fatigue life by 990% over that in the CR motion. In terms of life enhancement over the CR motion, the larger the curvature the less are the differences between different movements. Single crack initiation sites were found in the CR and SR motions, while three crack initiation sites were typical in the ± 45(o) /10rc/+7(o) motion. CONCLUSIONS Fatigue life increased with decreasing reciprocating amplitude in stationary reciprocation. A progressive reciprocating operation with ± 45(o) /10rc/+7(o) motion led to significant fatigue life enhancement and multiple fatigue crack initiation in NiTi endodontic instruments.
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Affiliation(s)
- C S Shin
- Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan
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Wei YJ, Tsai KS, Lin LC, Lee YT, Chi CW, Chang MC, Tsai TH, Hung SC. Catechin stimulates osteogenesis by enhancing PP2A activity in human mesenchymal stem cells. Osteoporos Int 2011; 22:1469-79. [PMID: 20683709 DOI: 10.1007/s00198-010-1352-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2010] [Accepted: 06/14/2010] [Indexed: 01/03/2023]
Abstract
SUMMARY Using human mesenchymal stem cells, we identified catechin from a panel of herbal ingredients and Chinese traditional compounds with the strongest osteogenic effects. Catechin increased alkaline phosphatase activity, calcium deposition, and mRNA expression of Runx2 and osteocalcin. We further clarified the signaling pathway that catechin mediated to stimulate osteogenesis. INTRODUCTION Human mesenchymal stem cells (hMSCs), useful as a species specific cell culture system for studying cell lineage differentiation, were examined as a tool to identify novel herbal ingredients and Chinese traditional compounds for enhancing osteogenesis. METHODS Immortalized and primary hMSCs were induced in osteogenic induction medium in the presence of a variety of herbal ingredients and Chinese traditional compounds and osteogenic differentiation was evaluated by histochemical assays and quantitative RT-PCR. RESULTS Using immortalized hMSCs, we first identified catechin, 18β-glycyrrhetinic acid, baishao, and danggui with osteogenic properties, which enhanced calcium deposition at the dose without significant cytotoxic effects. Primary hMSCs were then applied for confirming the osteogenic effects of catechin, which increased alkaline phosphatase activity, calcium deposition, and mRNA expression of Runx2 and osteocalcin. We further found the extracellular signal-regulated kinase (ERK) pathway was downregulated upon stimulation with catechin. Catechin increased the level and activity of protein phosphatases 2A (PP2A) that dephosphorylates ERK kinase (MEK) and ERK. Further, PP2A inhibitor, okadaic acid, abolished the effect of catechin-mediated inactivation of ERK and stimulation of osteogenesis. The blocking effect of okadaic acid on osteogenesis was further reversed by PD98059, a specific inhibitor of MEK. Co-immunoprecipitation revealed the association of PP2A to both MEK and ERK. CONCLUSIONS These studies propose catechin enhanced osteogenesis by increasing the PP2A level that inhibits the MEK and ERK signaling in hMSCs. These results prove the concept of using hMSCs as a convenient tool for rapid and consistent screening of the osteogenic herbal ingredients and traditional Chinese compounds.
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Affiliation(s)
- Y J Wei
- Laboratory of Pharmacokinetics, Institute of Traditional Medicine, National Yang-Ming University, 155, Sec 2, Li-Nong Street, Taipei 112, Taiwan
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Chen YJ, Chen YY, Chi CW, Liao HF. Abstract 2148: Thalidomide and liposomal doxorubicin inhibit differentiation and function of human osteoclasts. Cancer Res 2011. [DOI: 10.1158/1538-7445.am2011-2148] [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: 11/16/2022]
Abstract
Abstract
Background: Thalidomide inhibits angiogenesis and growth of multiple myeloma. Liposomal doxorubicin is mainly absorbed and degraded by monocyte-macrophage lineage in vivo, implicating a possible targeting effect. Given that osteoclasts (OCs) are derived from precursors of monocyte-macrophage lineage, we hypothesized that thalidomide, liposomal doxorubicin and their combination may affect osteoclastogenesis.
Materials and Methods: We isolated CD14+ monocytes from peripheral blood mononuclear cells of healthy subjects and generated OCs under stimulation with macrophage-colony forming factor and receptor activator of NK-κB ligand. Cell viability, surface CD51/61 expression, and tartrate-resistant acid phosphatase (TRAP) activity were assessed by using MTT, flow cytometry and immunohistochemical staining, respectively. Bone resorption activity of OCs was examined.
Results: The combination of thalidomide (purchased from TTY Biopharm, Taiwan) and liposomal doxorubicin (purchased from TTY Biopharm, Taiwan) profoundly inhibited the amount of harvested viable OCs. The expression of osteoclast-specific surface antigen CD51/61 was markedly inhibited by each drug and their combination. Specifically, the amount of multinucleated TRAP-positive cells characteristics of OCs and bone resorption activity of OCs were suppressed by each drug and, the mostly, their combination.
Conclusion: Thalidomide, liposomal doxorubicin and their combination, beyond currently clinical indications, might be effective regimen to inhibit human osteoclastogenesis.
Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 102nd Annual Meeting of the American Association for Cancer Research; 2011 Apr 2-6; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2011;71(8 Suppl):Abstract nr 2148. doi:10.1158/1538-7445.AM2011-2148
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Affiliation(s)
| | - Yu-Yawn Chen
- 2National Taiwan Sport University, Taichung, Taiwan
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Lin AMY, Ping YH, Chang GF, Wang JY, Chiu JH, Kuo CD, Chi CW. Neuroprotective effect of oral S/B remedy (Scutellaria baicalensis Georgi and Bupleurum scorzonerifolfium Willd) on iron-induced neurodegeneration in the nigrostriatal dopaminergic system of rat brain. J Ethnopharmacol 2011; 134:884-891. [PMID: 21296142 DOI: 10.1016/j.jep.2011.01.056] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2010] [Revised: 01/11/2011] [Accepted: 01/28/2011] [Indexed: 05/30/2023]
Abstract
AIM OF THE STUDY S/B remedy prepared from Scutellaria baicalensis Georgi and Bupleurum scorzonerifolfium Willd, two herbals of Xiao-Tsai-Hu-Tang or Sho-Saiko-To (TJ-9), contains active flavonoids. In this study, the protective effect of S/B remedy on iron-induced neurodegeneration was investigated in the nigrostriatal dopaminergic system of rat brain. MATERIALS AND METHODS The antioxidative activity of S/B remedy was studied using brain homogenates incubated with ferrous citrate (iron, 1M), S/B remedy, Trolox and melatonin. Furthermore, a Parkinsonian animal model by an intranigral infusion of iron in the anesthetized rats was employed to investigate the protective effect of S/B remedy in the nigrostriatal dopaminergic system. RESULTS Our in vitro studies showed that S/B remedy was more potent than melatonin and equal to trolox in inhibiting iron-induced lipid peroxidation of brain homogenates. Our in vivo studies found that oral administration of S/B remedy dose-dependently attenuated iron-elevated lipid peroxidation in the infused substantia nigra (SN) and iron-depleted dopamine levels in the ipsilateral striatum. Furthermore, iron-induced reductions in glutathione (GSH) content and increases in GSSG (oxidized GSH)/GSH ratio in the infused SN were inhibited in S/B remedy-treated rats. Systemic S/B remedy attenuated the iron-induced increases in heme-oxygenase-1 levels and α-synuclein aggregation in the infused SN. Moreover, S/B remedy reduced iron-induced apoptosis via attenuating mitochondrial and endoplasmic reticulum stress. In addition, S/B remedy was anti-inflammatory as indicated by the attenuation of iron-induced elevations in inducible nitric oxide synthase and cyclo-oxygenase II levels as well as glial fibrillary acidic protein (a biological marker of astrocytes) and ED-1 (a protein indicative of activated microglia) levels in the infused SN of S/B remedy-treated rats. CONCLUSIONS These findings suggest that oral administration of S/B remedy is protective against iron-induced neurodegeneration in the nigrostriatal dopaminergic system of rat brain. Therefore, S/B remedy may be therapeutically useful for the treatment of CNS neurodegenerative diseases.
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Affiliation(s)
- Anya M Y Lin
- Department of Pharmacology, School of Medicine, National Yang-Ming University, Taiwan, ROC.
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Lai HW, Kuo SJ, Chen LS, Chi CW, Chen ST, Chang TW, Chen DR. Prognostic significance of triple negative breast cancer at tumor size 1 cm and smaller. Eur J Surg Oncol 2010; 37:18-24. [PMID: 21093206 DOI: 10.1016/j.ejso.2010.10.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2010] [Revised: 10/11/2010] [Accepted: 10/26/2010] [Indexed: 12/15/2022] Open
Abstract
AIMS The purpose of this study was to clarify the prognostic significance of triple-negative breast cancer (TNBC) with a tumor size ≤ 1 cm. MATERIALS AND METHODS Patients with primary operable breast cancer with a tumor size ≤ 1 cm were enrolled at Changhua Christian Hospital and National Cheng-Kung University Hospital. Tumors negative for ER, PR, and HER-2 were classified as TNBCs and compared with tumors with any receptor positivity (non-TNBC) for disease-free survival (DFS) and cancer-specific survival (CSS). RESULTS From 1995 to 2006, a total of 377 patients with tumor size ≤ 1 cm were enrolled. Compared with non-TNBC patients, TNBC patients with a tumor size ≤ 1 cm as a whole or in a lymph node-positive subgroup were not associated with a poorer 5-year DFS and CSS. In lymph node-negative patients (pT1a-bN0M0), TNBC was associated with a poorer 5-year CSS but not DFS. Compared with the hormone receptor-positive, HER-2-negative subgroup, TNBC was associated with poorer DFS and CSS. In the multivariate Cox regression hazard analysis, lymph node invasion was the most important cause of disease recurrence and cancer-specific death. CONCLUSION TNBC is very likely an independent risk factor in small (≤1 cm) node-negative invasive breast cancer. With tumors 1 cm and smaller, lymph node invasion was the single most important prognostic factor.
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Affiliation(s)
- H W Lai
- Department of Surgery, Changhua Christian Hospital, 135 Nanhsiao Street, Changhua, Taiwan
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Chou FI, Chung HP, Liu HM, Chi CW, Lui WY. Suitability of boron carriers for BNCT: accumulation of boron in malignant and normal liver cells after treatment with BPA, BSH and BA. Appl Radiat Isot 2009; 67:S105-8. [PMID: 19375330 DOI: 10.1016/j.apradiso.2009.03.025] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Hepatocellular carcinoma remains widely prevalent in tropical Africa and south-east Asia. At present, there are no effective treatments for hepatoma and its prognosis is extremely poor unless the tumor was diagnosed in an early stage and resected before metastasis. Therefore, boron neutron capture therapy (BNCT) may provide an alternative therapy for treatment of hepatocellular carcinoma. In this study, the intracellular concentrations of L-boronophenylalanine (BPA), sodium borocaptate (BSH) and boric acid (BA) were examined in human hepatoma HepG2 and liver Clone 9 cell cultures. With the use of 25 microgB/mL media of BPA, BSH and BA, the intracellular uptake of boron in HepG2 and Clone 9 cells was compared. The suitability of BPA, BSH and BA were further evaluated on the basis of organ-specific boron distribution in normal rat tissues. BPA, BSH and BA were administered via intraperitoneal injection into rats with corresponding boron concentrations of 7, 25, and 25mg/kg body weight, respectively. The accumulation rates of BPA, BSH and BA in HepG2 cells were higher than that of Clone 9 cells. Boron concentration in BPA, BSH and BA treated HepG2 cells were 1.8, 1.5, and 1.6-fold of Clone 9 cells at 4h, respectively. In both HepG2 and Clone 9 cells, although the concentration of boron in BPA-treated cells exceeded that in BA-treated ones, however, cells treated with BPA had similar surviving fraction as those treated with BA after neutron irradiation. The accumulation ratios of boron in liver, pancreas and kidney to boron in blood were 0.83, 4.16 and 2.47, respectively, in BPA treated rats, and 0.75, 0.35 and 2.89, respectively, in BSH treated rats at 3h after treatment. However, boron does not appear to accumulate specifically in soft tissues in BA treated rats. For in situ BNCT of hepatoma, normal organs with high boron concentration and adjacent to liver may be damaged in neutron irradiation. BPA showed high retention in pancreas and may not be a good drug for BNCT of hepatoma. BSH had higher retention in liver but low level in pancreas and spleen appears to be a better candidate BNCT drug for hepatoma. These preliminary results provide useful information on future application of BNCT for hepatoma.
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Affiliation(s)
- F I Chou
- Nuclear Science and Technology Development Center, National Tsing Hua University, Taiwan, ROC.
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Chao HM, Chen YH, Liu JH, Lee SM, Lee FL, Chang Y, Yeh PH, Pan WHT, Chi CW, Liu TY, Lui WY, Ho LT, Kuo CD, Lin DE, Chan CC, Yang DM, Lin AMY, Chao FP. Iron-generated hydroxyl radicals kill retinal cells in vivo: effect of ferulic acid. Hum Exp Toxicol 2008; 27:327-39. [PMID: 18684804 DOI: 10.1177/0960327108092294] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Siderosis bulbi is vision threatening. An investigation into its mechanisms and management is crucial. Experimental siderosis was established by intravitreous administration of an iron particle (chronic) or FeSO4 (acute). After siderosis, there was a significant dose-responsive reduction in eletroretinogram (a/b-wave) amplitude, and an increase in •OH level, greater when caused by 24 mM FeSO4 than that by 8 mM FeSO4. Furthermore, the FeSO4-induced oxidative stress was significantly blunted by 100 μM ferulic acid (FA). Siderosis also resulted in an excessive glutamate release, increased [Ca++]i, and enhanced superoxide dismutase immunoreactivity. The latter finding was consistent with the Western blot result. Obvious disorganization including loss of photoreceptor outer segments and cholinergic amacrines together with a wide-spreading ferric distribution across the retina was present, which were related to the eletro-retinographic and pathologic dysfunctions. Furthermore, b-wave reduction and amacrine damage were respectively, significantly, dose-dependently, and clearly ameliorated by FA. Thus, siderosis stimulates oxidative stress, and possibly, subsequent excitotoxicity, and calcium influx, which explains why the retina is impaired electro-physiologically and pathologically. Importantly, FA protects iron toxicity perhaps by acting as a free radical scavenger. This provides an approach to the study and treatment of the iron-related disorders such as retained intraocular iron and Alzheimer disease.
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Affiliation(s)
- HM Chao
- Department of Ophthalmology, Veterans General Hospital, Taipei, Taiwan, Republic of China; Department of Ophthalmology, Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan, Republic of China; Institute of Pharmacology, School of Medicine, National Yang-Ming University, Taipei, Taiwan, Republic of China; Institute of Biomedical Engineering, National Yang-Ming University, Taipei, Taiwan, Republic of China; Department of Ophthalmology, China Medical University Hospital,
| | - YH Chen
- Department of Ophthalmology, Veterans General Hospital, Taipei, Taiwan, Republic of China; Institute of Pharmacology, School of Medicine, National Yang-Ming University, Taipei, Taiwan, Republic of China
| | - JH Liu
- Department of Ophthalmology, Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan, Republic of China; Cheng Hsin Rehabilitation Medical Center, Taipei, Taiwan, Republic of China
| | - SM Lee
- Department of Ophthalmology, Veterans General Hospital, Taipei, Taiwan, Republic of China; Department of Ophthalmology, Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan, Republic of China
| | - FL Lee
- Department of Ophthalmology, Veterans General Hospital, Taipei, Taiwan, Republic of China; Department of Ophthalmology, Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan, Republic of China
| | - Y Chang
- Institute of Biomedical Engineering, National Yang-Ming University, Taipei, Taiwan, Republic of China; Institute of Biophotonics, National Yang-Ming University, Taipei, Taiwan, Republic of China
| | - PH Yeh
- Institute of Pharmacology, School of Medicine, National Yang-Ming University, Taipei, Taiwan, Republic of China
| | - WHT Pan
- Institute of Pharmacology, School of Medicine, National Yang-Ming University, Taipei, Taiwan, Republic of China
| | - CW Chi
- Institute of Pharmacology, School of Medicine, National Yang-Ming University, Taipei, Taiwan, Republic of China; Department of Medical Research and Education, Veterans General Hospital, Taipei, Taiwan, Republic of China
| | - TY Liu
- Institute of Pharmacology, School of Medicine, National Yang-Ming University, Taipei, Taiwan, Republic of China; Department of Medical Research and Education, Veterans General Hospital, Taipei, Taiwan, Republic of China
| | - WY Lui
- Department of Surgery, Veterans General Hospital, Taipei, Taiwan, Republic of China; Department of Surgery, Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan, Republic of China
| | - LT Ho
- Department of Medical Research and Education, Veterans General Hospital, Taipei, Taiwan, Republic of China
| | - CD Kuo
- Department of Medical Research and Education, Veterans General Hospital, Taipei, Taiwan, Republic of China
| | - DE Lin
- Department of Ophthalmology, Veterans General Hospital, Taipei, Taiwan, Republic of China; Institute of Biomedical Engineering, National Yang-Ming University, Taipei, Taiwan, Republic of China
| | - CC Chan
- Department of Ophthalmology, Veterans General Hospital, Taipei, Taiwan, Republic of China; Institute of Biophotonics, National Yang-Ming University, Taipei, Taiwan, Republic of China
| | - DM Yang
- Institute of Biophotonics, National Yang-Ming University, Taipei, Taiwan, Republic of China; Department of Medical Research and Education, Veterans General Hospital, Taipei, Taiwan, Republic of China
| | - AMY Lin
- Department of Medical Research and Education, Veterans General Hospital, Taipei, Taiwan, Republic of China
| | - FP Chao
- Department of Ophthalmology, Veterans General Hospital, Taipei, Taiwan, Republic of China; Department of Medical Research and Education, Veterans General Hospital, Taipei, Taiwan, Republic of China
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Lin AMY, Chao PL, Fang SF, Chi CW, Yang CH. Endoplasmic reticulum stress is involved in arsenite-induced oxidative injury in rat brain. Toxicol Appl Pharmacol 2007; 224:138-46. [PMID: 17681577 DOI: 10.1016/j.taap.2007.06.016] [Citation(s) in RCA: 34] [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] [Subscribe] [Scholar Register] [Received: 02/13/2007] [Revised: 06/08/2007] [Accepted: 06/20/2007] [Indexed: 11/18/2022]
Abstract
The mechanism underlying sodium arsenite (arsenite)-induced neurotoxicity was investigated in rat brain. Arsenite was locally infused in the substantia nigra (SN) of anesthetized rat. Seven days after infusion, lipid peroxidation in the infused SN was elevated and dopamine level in the ipsilateral striatum was reduced in a concentration-dependent manner (0.3-5 nmol). Furthermore, local infusion of arsenite (5 nmol) decreased GSH content and increased expression of heat shock protein 70 and heme oxygenase-1 in the infused SN. Aggregation of alpha-synuclein, a putative pathological protein involved in several CNS neurodegenerative diseases, was elevated in the arsenite-infused SN. From the breakdown pattern of alpha-spectrin, both necrosis and apoptosis were involved in the arsenite-induced neurotoxicity. Pyknotic nuclei, cellular shrinkage and cytoplasmic disintegration, indicating necrosis, and TUNEL-positive cells and DNA ladder, indicating apoptosis was observed in the arsenite-infused SN. Arsenite-induced apoptosis was mediated via two different organelle pathways, mitochondria and endoplasmic reticulum (ER). For mitochondrial activation, cytosolic cytochrome c and caspase-3 levels were elevated in the arsenite-infused SN. In ER pathway, arsenite increased activating transcription factor-4, X-box binding protein 1, C/EBP homologues protein (CHOP) and cytosolic immunoglobulin binding protein levels. Moreover, arsenite reduced procaspase 12 levels, an ER-specific enzyme in the infused SN. Taken together, our study suggests that arsenite is capable of inducing oxidative injury in CNS. In addition to mitochondria, ER stress was involved in the arsenite-induced apoptosis. Arsenite-induced neurotoxicity clinically implies a pathophysiological role of arsenite in CNS neurodegeneration.
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Affiliation(s)
- Anya M Y Lin
- Department of Physiology, National Yang-Ming University, Taipei, Taiwan; Department of Medical Research and Education, Taipei Veterans General Hospital, Taipei, Taiwan
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Wang CN, Pan HC, Lin YL, Chi CW, Shiao YJ. Ester Derivatives of Tournefolic Acid B Attenuate N-Methyl-d-aspartate-Mediated Excitotoxicity in Rat Cortical Neurons. Mol Pharmacol 2005; 69:950-9. [PMID: 16365280 DOI: 10.1124/mol.105.018770] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The effects of tournefolic acid B (TAB) and two ester derivatives, TAB methyl ester (TABM) and TAB ethyl ester (TABE), on N-methyl-D-aspartate (NMDA)-mediated excitotoxicity and the underlying mechanisms were investigated. Treatment with 50 microM NMDA elicited neuronal death by 48.7 +/- 5.1%, coinciding with the appearance of injured morphology. TABM (50 microM) attenuated the NMDA-induced cell death by 60.9 +/- 19.7%, and to a lesser extent by TABE. The NMDA-mediated activation of calpain was not affected by TABM and TABE, as determined by the cleavage of alpha-spectrin. NMDA increased the activity of caspases 2, 3, 6, 8, and 9 and reached the maximum after 8-h treatment. TABM and TABE abrogated NMDA-induced activation of caspases 2, 3, 6, and 8 by approximately 80 to 90% and 50 to 60%, respectively, and to a higher extent for caspase 9. TABM and TABE also blocked the NMDA-mediated activation of caspase 12. Furthermore, TABM and TABE eliminated the NMDA-induced accumulation of superoxide anion (O2-*). NMDA evoked significant depolarization of mitochondria, whereas TABM elicited a mild decrease of mitochondrial membrane potential as determined by tetramethylrhodamine methyl ester perchlorate. NMDA treatment induced elevation of Ca2+ levels in cytosol, endoplasmic reticulum (ER), and mitochondria. TABM (50 microM) significantly diminished the NMDA-induced elevation of Ca2+ levels in mitochondria and ER but not cytosol. Therefore, TABM decreased mitochondrial membrane potential and attenuated the NMDA-mediated Ca2+-loading in ER and mitochondria. These events subsequently eliminated the accumulation of O2-* and blocked the activation of caspase cascade, thereby conferring their neuroprotective effects on NMDA-mediated excitotoxicity.
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Affiliation(s)
- Chuen-Neu Wang
- National Research Institute of Chinese Medicine, No. 155-1. Sec. 2, LiNung St., Peitou, Taipei, Taiwan, Republic of China
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Liu HC, Chi CW, Ko SY, Wang HC, Hong CJ, Lin KN, Wang PN, Liu TY. Cholinesterase inhibitor affects the amyloid precursor protein isoforms in patients with Alzheimer's disease. Dement Geriatr Cogn Disord 2005; 19:345-8. [PMID: 15785036 DOI: 10.1159/000084561] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [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] [Accepted: 11/01/2004] [Indexed: 11/19/2022] Open
Abstract
An altered platelet ratio of amyloid precursor protein (APP) isoforms might be a diagnostic, predictive, or therapeutic marker for Alzheimer's disease (AD). Our purpose was to test the hypothesis that this ratio might serve as a therapeutic marker for AD patients treated with the cholinesterase inhibitor, galantamine. Thirty-nine patients (mean age 76.6 +/- 9.4 years) with AD were treated with galantamine for 12 weeks. Patients were evaluated at baseline, 4 and 12 weeks by cognitive testing along with a determination of their platelet APP isoform ratio. Western blotting was performed to calculate the APP isoform ratio. At the end of the treatment, cognitive scores significantly improved, and the ratio of the high-molecular-weight (130 kDa) isoform to the low-molecular-weight (110-106 kDa) isoforms increased. These results suggest that cholinesterase inhibition might be involved in APP processing.
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Affiliation(s)
- H C Liu
- Department of Neurology, National Yang-Ming University School of Medicine, Taipei, Taiwan
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Shiao YJ, Lin YL, Sun YH, Chi CW, Chen CF, Wang CN. Falcarindiol impairs the expression of inducible nitric oxide synthase by abrogating the activation of IKK and JAK in rat primary astrocytes. Br J Pharmacol 2005; 144:42-51. [PMID: 15644867 PMCID: PMC1575975 DOI: 10.1038/sj.bjp.0706022] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [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: 12/17/2022] Open
Abstract
The effects of falcarindiol on the expression of inducible nitric oxide synthase (iNOS) induced by lipopolysaccharide/interferon-gamma (LPS/IFN-gamma) in rat primary astrocytes were investigated. The molecular mechanisms underlying falcarindiol that confers its effect on iNOS expression were also elucidated. Falcarindiol abrogated the LPS/IFN-gamma-mediated induction of iNOS by about 80%. Falcarindiol attenuated the induction of iNOS in a concentration-dependent manner. The inhibitory effect of falcarindiol on iNOS induction was attributable to decrease in the protein content and the mRNA level of iNOS. Treatment with 50 microM of falcarindiol for 30 min decreased LPS/IFN-gamma-induced nuclear factor-kappaB (NF-kappaB) activation by 32%. Treatment with 50 microM of falcarindiol for 60 min diminished the LPS/IFN-gamma-mediated activation of IkappaB kinase-alpha (IKK-alpha) and IKK-beta by 28.2 and 29.7%, respectively. Falcarindiol modulated the nuclear translocation of signal transducer and activator of transcription 1 (Stat1) in a time-dependent manner. Falcarindiol (50 microM) decreased the tyrosine phosphorylation of janus kinase 1 (JAK1) by 84.8% at 5 min. Falcarindiol also abrogated the tyrosine phoshorylation of JAK2 by 82.3% at 10 min.The present study demonstrates that falcarindiol attenuated the activation of IKK and JAK contributing to the blockade of activation of NF-kappaB and Stat1, thereby leading to the suppression of iNOS expression.
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Affiliation(s)
- Young-Ji Shiao
- National Research Institute of Chinese Medicine, Taipei, Taiwan, R.O.C
| | - Yun-Lian Lin
- National Research Institute of Chinese Medicine, Taipei, Taiwan, R.O.C
| | - Ya-Hui Sun
- National Research Institute of Chinese Medicine, Taipei, Taiwan, R.O.C
| | - Chih-Wen Chi
- Institute of Pharmacology, National Yang-Ming University, Taipei, Taiwan, R.O.C
| | - Chieh-Fu Chen
- National Research Institute of Chinese Medicine, Taipei, Taiwan, R.O.C
| | - Chuen-Neu Wang
- National Research Institute of Chinese Medicine, Taipei, Taiwan, R.O.C
- Author for correspondence:
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Wang PN, Liu HC, Liu TY, Chu A, Hong CJ, Lin KN, Chi CW. Estrogen-metabolizing gene COMT polymorphism synergistic APOE epsilon4 allele increases the risk of Alzheimer disease. Dement Geriatr Cogn Disord 2005; 19:120-5. [PMID: 15591802 DOI: 10.1159/000082663] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [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] [Accepted: 06/04/2004] [Indexed: 11/19/2022] Open
Abstract
Alzheimer disease (AD) is a polygenic multifactorial disorder. Several studies suggested that the neuroprotective effect of estrogen was based on an APOE-dependent mechanism. The goals of the current study were to determine if the genes involved in estrogen metabolism were linked to the risk of AD and find out if there was an interaction between estrogen-metabolizing gene polymorphisms and the APOE epsilon4 allele in the risk of prevalent AD. We investigated 66 patients with AD and 86 age- and gender-matched normal subjects. The polymorphisms of APOE and estrogen-metabolizing genes CYP17, CYP1A1 and COMT were examined. No association was found between each estrogen-metabolizing gene polymorphism and AD. However, the COMT HH genotype and APOE epsilon4 allele had a synergistic effect on the risk of AD. Taking subjects with epsilon4-epsilon4-/HH- as reference, the risk of developing AD in subjects with one epsilon4 allele (epsilon4+epsilon4-/HH-) was 2.6 (95% confidence interval, CI, 0.7- 9.1); however, the risk in subjects with both HH and one epsilon4 (epsilon4+epsilon4-/HH+) increased to 3.6 (95% CI 1.2-10.6). The subjects with homozygous epsilon4 still had the highest risk in developing AD (odds ratio 6.6, 95% CI 0.6-69.6). The p value of the linear trend test for this regression model was 0.004. It is possible that a high metabolism of estrogen by COMT may have reduced the protective effect of estrogen in AD. Further studies to clarify this interaction may improve our understanding of the generic risks for AD.
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Affiliation(s)
- P N Wang
- The Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan
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Chi CW, Wang CN, Lin YL, Chen CF, Shiao YJ. Tournefolic acid B methyl ester attenuates glutamate-induced toxicity by blockade of ROS accumulation and abrogating the activation of caspases and JNK in rat cortical neurons. J Neurochem 2005; 92:692-700. [PMID: 15659238 DOI: 10.1111/j.1471-4159.2004.02912.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [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: 11/30/2022]
Abstract
The effects of nine polyphenolic compounds on glutamate-mediated toxicity were investigated. The underlying mechanisms by which a polyphenolic compound confers its effect were also elucidated. Treatment of cortical neurons with 50 microm glutamate for 24 h decreased cell viability by 45.8 +/- 7.9%, and 50 microm of tournefolic acid B methyl ester attenuated glutamate-induced cell death by 46.8 +/- 17.8%. Glutamate increased the activity of caspase 35.2-fold, and to a similar extent for caspase 2, 6, 8 and 9. Tournefolic acid B methyl ester abrogated glutamate-induced activation of caspase 2, 3, 6 and 9 by about 70%, and to a lesser extent for caspase 8. Treatment with glutamate for 1 h elevated reactive oxygen species (ROS) by 208.3 +/- 21.3%. Tournefolic acid B methyl ester eliminated the glutamate-induced accumulation of ROS. Glutamate increased the phosphorylation of p54-c-jun N-terminal kinase (JNK) concomitantly with activation of the endogenous antioxidant defense system. Tournefolic acid B methyl ester at 50 microm diminished the activity of p54-JNK in control and glutamate-treated cells, coinciding with the abolishment of the glutamate-triggered antioxidant defense system. Therefore, tournefolic acid B methyl ester blocked the activation of the caspase cascade, eliminated ROS accumulation and abrogated the activation of JNK, thereby conferring a neuroprotective effect on glutamate-mediated neurotoxicity.
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Affiliation(s)
- Chih-Wen Chi
- Institute of Pharmacology, National Yang-Ming University, Taipei, Taiwan
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Chang YF, Chi CW, Chern YT, Wang JJ. Effects of 1, 6-Bis[4-(4-amino-3-hydroxyphenoxy)phenyl]diamantane (DPD), a reactive oxygen species and apoptosis inducing agent, on human leukemia cells in vitro and in vivo. Toxicol Appl Pharmacol 2005; 202:1-12. [PMID: 15589971 DOI: 10.1016/j.taap.2004.06.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [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: 02/12/2004] [Revised: 05/20/2004] [Accepted: 06/01/2004] [Indexed: 11/29/2022]
Abstract
1, 6-Bis[4-(4-amino-3-hydroxyphenoxy)phenyl]diamantine (DPD), a new cytostatic and differentiation inducing agent, was found to inhibit the growth of several cancer cell lines in the National Cancer Institute (NCI) Anticancer Drug Screen system. Previously, we demonstrated that DPD inhibited the growth of human colon cancer cell lines both in vitro and in vivo. In this study, we examined the anticancer effects of DPD on two human leukemia cells lines. DPD exerted growth inhibitory activities in vitro against two human leukemia cell lines, the promyeloid line HL-60 and the lymphoblastic line Molt-3. The in vivo effect of tumor growth suppression by DPD was also observed in mouse xenografts. No acute toxicity was observed after an intra-peritoneal challenge of DPD in "severe combined immune-deficiency" (SCID) mice twice a week. The in vitro study showed HL-60 was more sensitive to DPD than Molt-3 through induction of G(0)/G(1) cell-cycle arrest with the appearance of a hypodiploid DNA fraction. The increased superoxide (O(2)(-)), dissipation of the mitochondrial membrane potential, activation of caspase 3, and increase in annexin V binding were evident before apoptosis in DPD-treated cells. The superoxide dismutase 1 (SOD1) mRNA expression was also decreased in DPD-treated HL-60 and Molt-3 cells. Thus, it appeared that inhibition of SOD might be the major cause for the production of cellular superoxide with concomitant decrease of H(2)O(2) in DPD-treated cells. Addition of antioxidant can reduce DPD-induced mitochondrial damage, caspase activation, and annexin V binding in HL-60 cells. The results suggest that the cellular generation of O(2)(-) plays a role in initiating and coordinating DPD-mediated growth arrest and apoptosis of HL-60 cells. Importantly, addition of arsenic trioxide, a compound capable of reactive oxygen species (ROS) generation, significantly enhanced the in vitro activity of DPD. These results suggest that DPD appears to be a potential new modality in human leukemia therapy.
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Affiliation(s)
- Y F Chang
- Department of Medical Research and Education, Taipei Veterans General Hospital, Taipei, Taiwan
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Chang JB, Wang PN, Chen WT, Liu CY, Hong CJ, Lin KN, Liu TY, Chi CW, Liu HC. ApoEε4 allele is associated with incidental hallucinations and delusions in patients with AD. Neurology 2004; 63:1105-7. [PMID: 15452311 DOI: 10.1212/01.wnl.0000138612.24301.32] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [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: 11/15/2022] Open
Abstract
Of 135 patients with Alzheimer disease (AD), 56 without psychiatric symptoms at the first visit were followed for a mean period of 51.9 +/- 10.3 months to identify incident psychiatric symptoms. The hazard ratios of ApoE epsilon4 allele in developing psychiatric symptoms were calculated by Cox regression hazard analyses. The presence of the ApoE epsilon4 allele carried a 19.0-fold risk for developing hallucinations and a 3.4-fold risk for delusions.
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Affiliation(s)
- J B Chang
- Department of Neurology, National Yang-Ming University School of Medicine, Taipei County, Taiwan
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Yin PH, Lee HC, Chau GY, Wu YT, Li SH, Lui WY, Wei YH, Liu TY, Chi CW. Alteration of the copy number and deletion of mitochondrial DNA in human hepatocellular carcinoma. Br J Cancer 2004; 90:2390-6. [PMID: 15150555 PMCID: PMC2409531 DOI: 10.1038/sj.bjc.6601838] [Citation(s) in RCA: 164] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Somatic mutations in mitochondrial DNA (mtDNA) have been detected in hepatocellular carcinoma (HCC). However, it remains unclear whether mtDNA copy number and mitochondrial biogenesis are altered in HCC. In this study, we found that mtDNA copy number and the content of mitochondrial respiratory proteins were reduced in HCCs as compared with the corresponding non-tumorous livers. MtDNA copy number was significantly reduced in female HCC but not in male HCC. Expression of the peroxisome proliferator-activated receptor γ coactivator-1 was significantly repressed in HCCs (P<0.005), while the expression of the mitochondrial single-strand DNA-binding protein was upregulated, indicating that the regulation of mitochondria biogenesis is disturbed in HCC. Moreover, 22% of HCCs carried a somatic mutation in the mtDNA D-loop region. The non-tumorous liver of the HCC patients with a long-term alcohol-drinking history contained reduced mtDNA copy number (P<0.05) and higher level of the 4977 bp-deleted mtDNA (P<0.05) as compared with non-alcohol patients. Our results suggest that reduced mtDNA copy number, impaired mitochondrial biogenesis and somatic mutations in mtDNA are important events during carcinogenesis of HCC, and the differential alterations in mtDNA of male and female HCC may contribute to the differences in the clinical manifestation between female and male HCC patients.
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Affiliation(s)
- P H Yin
- Institute of Pharmacology, National Yang-Ming University, Taiwan, Republic of China
| | - H C Lee
- Institute of Pharmacology, National Yang-Ming University, Taiwan, Republic of China
- Institute of Biochemistry, Chung Shan Medical University, Taiwan, Republic of China
| | - G Y Chau
- Department of Surgery, National Yang-Ming University, Taiwan, Republic of China
- Department of Surgery, Taipei Veterans General Hospital, Taiwan, Republic of China
| | - Y T Wu
- Institute of Biochemistry, Chung Shan Medical University, Taiwan, Republic of China
| | - S H Li
- Institute of Biochemistry, Chung Shan Medical University, Taiwan, Republic of China
| | - W Y Lui
- Department of Surgery, National Yang-Ming University, Taiwan, Republic of China
- Department of Surgery, Taipei Veterans General Hospital, Taiwan, Republic of China
| | - Y H Wei
- Department of Biochemistry and Center for Cellular and Molecular Biology, National Yang-Ming University, Taiwan, Republic of China
| | - T Y Liu
- Institute of Pharmacology, National Yang-Ming University, Taiwan, Republic of China
- Department of Medical Research and Education, Taipei Veterans General Hospital, Taipei 11217, Taiwan, Republic of China
| | - C W Chi
- Institute of Pharmacology, National Yang-Ming University, Taiwan, Republic of China
- Department of Medical Research and Education, Taipei Veterans General Hospital, Taipei 11217, Taiwan, Republic of China
- Department of Medical Research and Education, Taipei Veterans General Hospital, Taipei 11217, Taiwan, Republic of China. E-mail:
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Lin SJ, Shiao YJ, Chi CW, Yang LM. Abeta aggregation inhibitors. Part 1: Synthesis and biological activity of phenylazo benzenesulfonamides. Bioorg Med Chem Lett 2004; 14:1173-6. [PMID: 14980659 DOI: 10.1016/j.bmcl.2003.12.086] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [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: 11/18/2003] [Accepted: 12/16/2003] [Indexed: 11/16/2022]
Abstract
Phenylazo benzenesulfonamides were designed and synthesized as beta-amyloid (Abeta40) fibril assembly inhibitors, and evaluated for inhibition of Abeta40 aggregation and neurotoxicity using rat cortical neurons. Compound 2 (LB-152) was the most potent compound in this study, and the para-NMe(2) group on the end of the phenylazo moiety may play an important role in preventing Abeta40 fibril formation. LB-152 provides a new lead for further development of potential beta-amyloid aggregation inhibitors to treat AD.
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Affiliation(s)
- Shwu-Jiuan Lin
- Department of Medicinal Chemistry, College of Pharmacy, Taipei Medical University, 250 Wu-Hsing St., Taipei 110, Taiwan
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