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Wu SY, Yang WY, Cheng CC, Hsiao MC, Tsai SL, Lin HK, Lin KH, Yuh CH. Low Molecular Weight Fucoidan Prevents Radiation-Induced Fibrosis and Secondary Tumors in a Zebrafish Model. Cancers (Basel) 2020; 12:cancers12061608. [PMID: 32570707 PMCID: PMC7353073 DOI: 10.3390/cancers12061608] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Revised: 06/12/2020] [Accepted: 06/16/2020] [Indexed: 12/15/2022] Open
Abstract
Radiotherapy often causes unwanted side effects such as radiation-induced fibrosis and second malignancies. Fucoidan, a sulfated polysaccharide extracted from brown seaweed, has many biological effects including anti-inflammation and anti-tumor. In the present study, we investigated the radioprotective effect of Oligo-Fucoidan (OF) using a zebrafish animal model. Adult zebrafish of wild-type and transgenic fish with hepatocellular carcinoma were orally fed with Oligo-Fucoidan before irradiation. Quantitative PCR, Sirius red stain, hematoxylin, and eosin stain were used for molecular and pathological analysis. Whole genomic microarrays were used to discover the global program of gene expression after Oligo-Fucoidan treatment and identified distinct classes of up- and downregulated genes/pathways during this process. Using Oligo-Fucoidan oral gavage in adult wild-type zebrafish, we found Oligo-Fucoidan pretreatment decreased irradiation-induced fibrosis in hepatocyte. Using hepatitis B virus X antigen (HBx), Src and HBx, Src, p53−/+ transgenic zebrafish liver cancer model, we found that Oligo-Fucoidan pretreatment before irradiation could lower the expression of lipogenic factors and enzymes, fibrosis, and cell cycle/proliferation markers, which eventually reduced formation of liver cancer compared to irradiation alone. Gene ontology analysis revealed that Oligo-Fucoidan pretreatment increased the expression of genes involved in oxidoreductase activity in zebrafish irradiation. Oligo-Fucoidan also decreased the expression of genes involved in transferase activity in wild-type fish without irradiation (WT), nuclear outer membrane-endoplasmic reticulum membrane network, and non-homologous end-joining (NHEJ) in hepatocellular carcinoma (HCC) transgenic fish. Rescue of those genes can prevent liver cancer formation. Conclusions: Our results provide evidence for the ability of Oligo-Fucoidan to prevent radiation-induced fibrosis and second malignancies in zebrafish.
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Affiliation(s)
- Szu-Yuan Wu
- Department of Food Nutrition and Health Biotechnology, College of Medical and Health Science, Asia University, Taichung 42354, Taiwan;
- Division of Radiation Oncology, Department of Medicine, Lo-Hsu Medical Foundation, Lotung Poh-Ai Hospital, Yilan 265, Taiwan
- Big Data Center, Lo-Hsu Medical Foundation, Lotung Poh-Ai Hospital, Yilan 265, Taiwan
- Department of Healthcare Administration, College of Medical and Health Science, Asia University, Taichung 41354, Taiwan
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan
| | - Wan-Yu Yang
- Institute of Molecular and Genomic Medicine, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan; (W.-Y.Y.); (C.-C.C.); (S.-L.T.); (H.-K.L.); (K.-H.L.)
| | - Chun-Chia Cheng
- Institute of Molecular and Genomic Medicine, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan; (W.-Y.Y.); (C.-C.C.); (S.-L.T.); (H.-K.L.); (K.-H.L.)
- Radiation Biology Research Center, Institute for Radiological Research, Chang Gung University/Chang Gung Memorial Hospital at Linkou, Taoyuan 33302, Taiwan
| | - Ming-Chen Hsiao
- Research and Development Center, Hi-Q Marine Biotech International Ltd., Songshan District, Taipei 10561, Taiwan;
| | - Shin-Lin Tsai
- Institute of Molecular and Genomic Medicine, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan; (W.-Y.Y.); (C.-C.C.); (S.-L.T.); (H.-K.L.); (K.-H.L.)
| | - Hua-Kuo Lin
- Institute of Molecular and Genomic Medicine, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan; (W.-Y.Y.); (C.-C.C.); (S.-L.T.); (H.-K.L.); (K.-H.L.)
| | - Kuan-Hao Lin
- Institute of Molecular and Genomic Medicine, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan; (W.-Y.Y.); (C.-C.C.); (S.-L.T.); (H.-K.L.); (K.-H.L.)
| | - Chiou-Hwa Yuh
- Institute of Molecular and Genomic Medicine, National Health Research Institutes, Zhunan, Miaoli 35053, Taiwan; (W.-Y.Y.); (C.-C.C.); (S.-L.T.); (H.-K.L.); (K.-H.L.)
- Institute of Bioinformatics and Structural Biology, National Tsing-Hua University, Hsinchu 30013, Taiwan
- Department of Biological Science & Technology, National Chiao Tung University, Hsinchu 30010, Taiwan
- Program in Environmental and Occupational Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
- Correspondence: ; Tel.: +886-37-246-166 (ext. 3538); Fax: +886-37-586-459
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Hsiao MC, Jiang SH. In-phantom neutron dose measurement using Gafchromic film dosimeter for QA of BNCT beams. Appl Radiat Isot 2019; 143:79-86. [DOI: 10.1016/j.apradiso.2018.09.030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 08/31/2018] [Accepted: 09/29/2018] [Indexed: 11/15/2022]
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Affiliation(s)
- Ming-Chen Hsiao
- National Tsing Hua University, Department of Engineering and System Science 101, Sec. 2, Kung-Fu Road, Hsinchu, Taiwan 30013
| | - Shiang-Huei Jiang
- National Tsing Hua University, Department of Engineering and System Science 101, Sec. 2, Kung-Fu Road, Hsinchu, Taiwan 30013
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Schmitz T, Bassler N, Blaickner M, Ziegner M, Hsiao MC, Liu YH, Koivunoro H, Auterinen I, Serén T, Kotiluoto P, Palmans H, Sharpe P, Langguth P, Hampel G. The alanine detector in BNCT dosimetry: dose response in thermal and epithermal neutron fields. Med Phys 2015; 42:400-11. [PMID: 25563280 DOI: 10.1118/1.4901299] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
PURPOSE The response of alanine solid state dosimeters to ionizing radiation strongly depends on particle type and energy. Due to nuclear interactions, neutron fields usually also consist of secondary particles such as photons and protons of diverse energies. Various experiments have been carried out in three different neutron beams to explore the alanine dose response behavior and to validate model predictions. Additionally, application in medical neutron fields for boron neutron capture therapy is discussed. METHODS Alanine detectors have been irradiated in the thermal neutron field of the research reactor TRIGA Mainz, Germany, in five experimental conditions, generating different secondary particle spectra. Further irradiations have been made in the epithermal neutron beams at the research reactors FiR 1 in Helsinki, Finland, and Tsing Hua open pool reactor in HsinChu, Taiwan ROC. Readout has been performed with electron spin resonance spectrometry with reference to an absorbed dose standard in a (60)Co gamma ray beam. Absorbed doses and dose components have been calculated using the Monte Carlo codes fluka and mcnp. The relative effectiveness (RE), linking absorbed dose and detector response, has been calculated using the Hansen & Olsen alanine response model. RESULTS The measured dose response of the alanine detector in the different experiments has been evaluated and compared to model predictions. Therefore, a relative effectiveness has been calculated for each dose component, accounting for its dependence on particle type and energy. Agreement within 5% between model and measurement has been achieved for most irradiated detectors. Significant differences have been observed in response behavior between thermal and epithermal neutron fields, especially regarding dose composition and depth dose curves. The calculated dose components could be verified with the experimental results in the different primary and secondary particle fields. CONCLUSIONS The alanine detector can be used without difficulty in neutron fields. The response has been understood with the model used which includes the relative effectiveness. Results and the corresponding discussion lead to the conclusion that application in neutron fields for medical purpose is limited by its sensitivity but that it is a useful tool as supplement to other detectors and verification of neutron source descriptions.
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Affiliation(s)
- T Schmitz
- Institute for nuclear chemistry, Johannes Gutenberg-University, Mainz D-55128, Germany
| | - N Bassler
- Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, Aarhus C, Aarhus 8000, Denmark
| | - M Blaickner
- AIT Austrian Institute of Technology GmbH, Vienna A-1220, Austria
| | - M Ziegner
- AIT Austrian Institute of Technology GmbH, Vienna A-1220, Austria and TU Wien, Vienna University of Technology, Vienna A-1020, Austria
| | - M C Hsiao
- Insitute of Nuclear Engineering and Science, National Tsing Hua University, Hsinchu 30013, Taiwan, Republic of China
| | - Y H Liu
- Nuclear Science and Technology Development Center, National Tsing Hua University, Hsinchu 30013, Taiwan, Republic of China
| | - H Koivunoro
- Department of Physics, University of Helsinki, POB 64, FI-00014, Finland and HUS Medical Imaging Center, Helsinki University Central Hospital, FI-00029 HUS, Finland
| | - I Auterinen
- VTT Technical Research Centre of Finland, Espoo, Finland
| | - T Serén
- VTT Technical Research Centre of Finland, Espoo, Finland
| | - P Kotiluoto
- VTT Technical Research Centre of Finland, Espoo, Finland
| | - H Palmans
- National Physical Laboratory, Acoustics and Ionising Radiation Division, Teddington TW11 0LW, United Kingdom and Medical Physics Group, EBG MedAustron GmbH, Wiener Neustadt A-2700, Austria
| | - P Sharpe
- National Physical Laboratory, Acoustics and Ionising Radiation Division, Teddington TW11 0LW, United Kingdom
| | - P Langguth
- Department of Pharmacy and Toxicology, University of Mainz, Mainz D-55128, Germany
| | - G Hampel
- Institut für Kernchemie, Johannes Gutenberg-Universität, Mainz D-55128, Germany
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Hsiao MC, Liu YH, Jiang SH. Computational study of room scattering influence in the THOR BNCT treatment room. Appl Radiat Isot 2013; 88:162-6. [PMID: 24365466 DOI: 10.1016/j.apradiso.2013.11.039] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Accepted: 11/18/2013] [Indexed: 10/25/2022]
Abstract
BNCT dosimetry has often employed heavy Monte Carlo calculations for the beam characterization and the dose determination. However, these calculations commonly ignored the scattering influence between the radiations and the room structure materials in order to facilitate the calculation speed. The aim of this article attempts to explore how the room scattering affects the physical quantities such as the capture reaction rate and the gamma-ray dose rate under in-phantom and free-air conditions in the THOR BNCT treatment room. The geometry and structure materials of the treatment room were simulated in detail. The capture reaction rates per atom, as well as the gamma-ray dose rate were calculated in various sizes of phantoms and in the free-air condition. Results of this study showed that the room scattering has significant influence on the physical quantities, whether in small phantoms or in the free-air condition. This paper may be of importance in explaining the discrepancies between measurements and calculations in the BNCT dosimetry using small phantoms, in addition to provide a useful consideration with a better understanding of how the room scattering influence acts in a BNCT facility.
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Affiliation(s)
- Ming-Chen Hsiao
- Institute of Nuclear Engineering and Science, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Yuan-Hao Liu
- Nuclear Science and Technology Development Center, National Tsing Hua University, Hsinchu 30013, Taiwan.
| | - Shiang-Huei Jiang
- Institute of Nuclear Engineering and Science, National Tsing Hua University, Hsinchu 30013, Taiwan
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Lin YC, Hwang JJ, Wang SJ, Yang BH, Chang CW, Hsiao MC, Chou FI. Macro- and microdistributions of boron drug for boron neutron capture therapy in an animal model. Anticancer Res 2012; 32:2657-2664. [PMID: 22753723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
BACKGROUND The boron concentration (BC) in the blood, rather than in normal tissue, is often used as the reference to calculate the BC in tumor for boron neutron capture therapy (BNCT). The aims of this study were to justify whether BC in the blood is equal to that of normal tissue, and to verify the macro- and microdistributions of boron in tumor. MATERIALS AND METHODS BALB/c nude mice bearing SAS human oral carcinoma xenografts were intravenously injected with 400 mg/kg of boronophenylalanine (BPA). Macro- and microdistributions of boron in the tumor were assayed with (18)F-fluoro-L-boronophenylalanine-fructose (FBPA-Fr)/micro-positron-emission tomography (PET) and alpha track autoradiography, respectively. RESULTS The BCs assayed from the blood, normal tissue and tumor varied even on sampling at the same time points post-BPA administration. The ratio of BC in normal tissue to that in blood, i.e. N/B ratio, remains about 1.31 at 30 to 45 min post-BPA administration. Furthermore, (18)F-FBPA-Fr/micro-PET imaging and autoradiography also showed heterogeneous boron distribution in the tumor. CONCLUSION The heterogeneous distribution of boron in the tumor is a limiting factor for the precise calculation of BC in the tumor. Here we suggest that the N/B ratio could be used to calculate the true BC in the tumor and in normal tissue for BNCT. (18)F-FBPA-Fr/PET imaging is useful to justify the N/B ratio for BNCT treatment.
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Affiliation(s)
- Yu-Chuan Lin
- Institute of Nuclear Engineering and Science, National Tsing Hua University, Hsinchu, Taiwan, ROC
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Hsiao MC, Wang HP, Chang JE, Peng CY. Tracking of copper species in incineration fly ashes. J Hazard Mater 2006; 138:539-42. [PMID: 16839673 DOI: 10.1016/j.jhazmat.2006.05.087] [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] [Subscribe] [Scholar Register] [Received: 03/31/2006] [Revised: 05/25/2006] [Accepted: 05/26/2006] [Indexed: 05/10/2023]
Abstract
Speciation of copper in the incineration waste heat boiler (HB) and the down stream electrostatic precipitator (EP) fly ashes during the flue gas cooling down (1123-->473 K) has been studied by X-ray absorption near edge structural (XANES) spectroscopy in the present work. Copper species such as Cu(OH)(2) (59-67%), CuCl(2) (5-12%), CuO (24-26%), and a small amount of CuS (3-4%) in fly ashes were determined by semi-quantitative analyses of the XANES spectra. In the toxicity characteristics leaching procedure (TCLP) tests, about 83 and 20% of copper were leached from the EP and HB fly ashes, respectively. The relatively high leachability of copper for the EP fly ash might be due to the fact that CuCl(2) was enriched on the surfaces as observed by X-ray photoelectron spectroscopy (XPS). On the contrary, CuCl(2) was mainly encapsulated in the HB fly ashes.
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Affiliation(s)
- M C Hsiao
- Department of Environmental Engineering, National Cheng Kung University, No. 1, Ta-Hsueh Road, Tainan City 70101, Taiwan.
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Ku CC, Wang HP, Lee PH, Hsiao MC, Huang HL, Wang HC. Speciation of chromium in an electroplating sludge during thermal stabilization. Bull Environ Contam Toxicol 2003; 71:860-865. [PMID: 14672143 DOI: 10.1007/s00128-003-0215-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Affiliation(s)
- C C Ku
- Department of Environmental Engineering, National Cheng Kung University, Tainan, Taiwan, Republic of China
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Hsiao MC, Wang HP. Speciation of copper in a contaminated soil. Bull Environ Contam Toxicol 2003; 71:804-809. [PMID: 14672135 DOI: 10.1007/s00128-003-0205-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Affiliation(s)
- M C Hsiao
- Department of Environmental Engineering, Cheng Kung University, Tainan City, Taiwan, Republic of China
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Abstract
The speciation of copper and zinc in the incineration fly ash of a municipal solid waste in Taiwan was investigated in the present work. By the least-squares fitted X-ray absorption near edge structural (XANES) spectroscopy, we found that CuCO3, CuOH2, and CuO (fractions of 0.09, 0.39 and 0.51, respectively) were the main copper species in the fly ash. Quantitative analysis of the extended X-ray absorption fine structural (EXAFS) spectra indicated that the bond distance of Cu-O in the fly ash was 1.96 A with a coordination number (CN) of 3.9 in the first shell of copper. In the second shell, the bond distance and CN of Cu-(O)-Cu were 2.91 A and 2.7, respectively. In addition, speciation of Zn was also examined in the same X-ray absorption energy (8780-9970 eV). The bond distance of Zn-O and Zn-O-Zn were 1.97 and 2.94 A, respectively. However, the Zn-O-Cu structure was not found because of the physically unreasonable sigma(2) (Debye-Waller factor) values in the EXAFS data fitting process.
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Affiliation(s)
- M C Hsiao
- Department of Environmental Engineering, National Cheng Kung University, Tainan, Taiwan, ROC
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Hsieh JH, Chang YC, Chung JL, Hsiao MC, Chen SC, Yen CT, Chai CY. The relationship between FTL and NA, DMV or CVLM in central cardiovascular control. CHINESE J PHYSIOL 2001; 44:169-79. [PMID: 11908546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023] Open
Abstract
The aim of the present study was to examine the relationship between the lateral tegmental field (FTL), a cardioinhibitory area, with other cardioinhibitory areas, i.e., the ambiguus nucleus (NA) and the dorsal motor nucleus of vagus (DMV) and the caudal ventrolateral medulla (CVLM), a vasopressor inhibitory area. In 55 cats anesthetized with chloralose (40 mg/kg) and urethane (400 mg/kg), the cardiovascular responses of heart rate (HR), systemic arterial blood pressure (SAP) and vertebral nerve activity (VNA) were recorded. The FTL, NA, DMV and CVLM were identified first by stimulation (rectangular pulses in 80 Hz, 0.5 ms, 50-100 microA) and then confirmed by microinjection of sodium glutamate (Glu, 0.25M, 70 nl). In studying the influence of NA, DMV, or CVLM lesion on the Gluinduced responses in FTL, kainic acid (KA, 24 mM, 100 nl) was microinjected into the NA, DMV or CVLM. FTL stimulation produced an average decrease of HR by 55%. After KA lesioning of the ipsilateral NA or the DMV, the decreased HR induced by FTL was significantly diminished. After subsequent lesion of the contralateral DMV or NA, the bradycardia of FTL was abolished. The reduction of resting HR was more intense after lesioning the NA than DMV and with the left side more than that of the right side. These studies suggest that the cardioinhibitory responses of FTL are mediated through both NA and DMV with predominance of the former, while the hypotensive effect of FTL is mediated through CVLM. The precise pathway responsible for the FTL-induced bradycardia and hypotension is to be determined.
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Affiliation(s)
- J H Hsieh
- Institute of Biomedical Engineering, Chung Yuan Christian University, Taiwan, ROC
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Abstract
Speciation of copper in the fly ash solidification process has been studied by X-ray based spectroscopies inthe present work. Fourier transformed EXAFS (extended X-ray absorption fine structural) spectra of the solidified fly ashes showed that the bond distance of Cu-O (first shell) was 1.96 A with a coordination number (CN) of about 3.0. However, in the second shell of copper atoms, the bond distance of Cu-(O)-Cu was decreased by 0.12-0.22 A during solidification, which might cause the stabilization of the CuO species in the solidified fly ash matrix. By the least-squares fits of the XANES (X-ray absorption near edge structural) spectra, fractions of the main copper species in the solidified fly ashes such as CuCl2 (0.08-0.11), Cu2O (0.07-0.09), Cu(OH)2 (0.31-0.33), and CuO (0.49-0.52) were observed. Combined EXAFS and XANES observations suggested that chemical reactions such as hydroxylation of CuCl2 and oxidation of Cu2O and/or metallic Cu might involve in the solidification process, which also led to a significant reduction of the leachability of copper from the solidified fly ashes.
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Affiliation(s)
- M C Hsiao
- Department of Environmental Engineering, National Cheng Kung University, Tainan City, Taiwan
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Hsiao MC, Wang HP, Huang YJ, Yang YW. EXAFS study of copper in waste incineration fly ashes. J Synchrotron Radiat 2001; 8:931-933. [PMID: 11512983 DOI: 10.1107/s0909049500020987] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2000] [Accepted: 12/21/2000] [Indexed: 05/23/2023]
Abstract
Copper species such as CuCO3, Cu(OH)2, CuS and CuO were found in the bag house and EP (electrostatic precipitator) fly ashes of waste incineration processes by X-ray absorption near edge structural (XANES) spectroscopy. A small amount of Cu(I) and metallic Cu was found in the bag house fly ash. The averaged Cu-O bond distance in the fly ashes determined by EXAFS (extended X-ray absorption fine structural) was 1.96 A with coordination numbers of 2.4-3.9. However, the Cu-(O)-Cu (2nd shell) bond distance of the fly ashes in the incineration process was decreased by 0.19-0.21 A if compared to that of the CuO standard. The coordination numbers of the 2nd shell contribution to the bag house fly ash were not very significant.
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Affiliation(s)
- M C Hsiao
- Department of Environmental Engineering, National Cheng Kung University, Tainan, Taiwan, ROC
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Abstract
Penicillium notatum is a well-known indoor aeroallergen and is frequently included in skin test panels for allergic diagnosis. On two-dimensional immunoblotting using patients' sera containing IgE and monoclonal antibody D7B8 specific for Pen c 1 of P. citrinum, two allergens with a molecular mass of 33 kDa but different isoelectric points were identified. A novel cDNA coding for Pen n 13 was cloned and sequenced. The nucleotide sequence codes for a protein 397 amino acids including a putative signal peptide of 25 amino acids and a propeptide of 90 amino acids. The allergen is an alkaline serine protease that shares more than 39% identical residues with other kinds of mold allergens. The coding cDNA of Pen n 13 was cloned into vector pQE-30 and expressed in E. coli M15 as a His-tag fusion protein and purified to homogeneity. The fusion protein reacted with monoclonal antibodies of Pen c 1 and with IgE from Penicillium-allergic patients. Furthermore, it also cross-reacted strongly with IgE specific for the natural Pen c 1, indicating that similar IgE binding epitopes may exist in the allergens of P. notatum and P. citrinum. Antigenicity index plots indicated that there are several similar epitope regions of high antigenic indices in Pen c 1 and Pen n 13, corroborating that mold allergens belonging to the alkaline serine protease family possess similar protein structure and strong antigenic cross-reactivity.
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Affiliation(s)
- L P Chow
- Institute of Biochemistry, National Taiwan University, Taipei, Taiwan 100, Republic of China
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Abstract
Patients who visited the psychiatric outpatient service of Chang Gung Medical Centre, Tao-Yuan, Taiwan during an 8-year period were studied retrospectively. Among the 10,418 outpatients, 86 (0.83%) were diagnosed as having DSM-IV delusional disorder (DD), including 61 (70.9%) with persecutory type, 12 (14.0%) with the mixed type, seven (8.1%) with jealous type, two (2.3%) with somatic type, two (2.1%) with unspecified type, one (1.2%) with erotomanic type, and another one with grandiose type. The ratio of women to men was 0.86. The mean age at onset was 42.4 +/- 15.41 years, with women being older than men. Thirty-seven cases (43.0%) presented with depressive symptoms at their first visit. Subjects were divided into four groups: persecutory type, jealous type, mixed type and others. There were no significant differences between the four groups in terms of gender, age at onset, time-lapse before seeking psychiatric help, the presence of hallucination or the presence of depression.
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Affiliation(s)
- M C Hsiao
- Department of Psychiatry, Chang Gung Memorial Hospital, Tao-yuan, Taiwan
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Abstract
Ramsay Hunt syndrome (RHS) is a rare condition within the progressive myoclonic epilepsies syndrome (PME), with a triad of action myoclonus, grand mal seizure and severe cerebellar ataxia. There are few reports about the psychiatric disturbances associated with PME or RHS. The present study examines the evidence that RHS may accompany an organic mental syndrome, ethanol's effective suppression of myoclonus, and the possible resultant problem of alcohol dependence in RHS patients. Two brothers with the previous long-standing diagnosis of RHS and their mental symptoms of persecutory delusion and depression are reported, as well as the additional problem of alcohol dependence in one of them. The cerebellar dysfunction found in RHS may be associated with an underlying organic condition. Determination of the relationship between cerebellar dysfunction and psychosis in RHS will require further study. Although the mechanism of the suppression of myoclonus by alcohol remains unclear, patients should be allowed to drink socially, and alcohol consumption should not be totally prohibited. However, effective treatment of the problems of alcohol tolerance, abuse, or dependence requires the cooperation of both neurologists and psychiatrists.
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Affiliation(s)
- M C Hsiao
- Department of Psychiatry, Chang Gung Memorial Hospital, Tao-yuan, Taiwan
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Nair MG, Nanavati NT, Nair IG, Kisliuk RL, Gaumont Y, Hsiao MC, Kalman TI. Folate analogues. 26. Syntheses and antifolate activity of 10-substituted derivatives of 5,8-dideazafolic acid and of the poly-gamma-glutamyl metabolites of N10-propargyl-5,8-dideazafolic acid (PDDF). J Med Chem 1986; 29:1754-60. [PMID: 3091832 DOI: 10.1021/jm00159a032] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The poly-gamma-glutamyl derivatives of n10-propargyl-5,8-dideazafolic acid (PDDF) with a chain length of up to five glutamate residues were synthesized from N10-propargyl-5,8-dideazapteroic acid by the solid-phase procedure. These compounds were evaluated for their antifolate activity using folate-requiring microorganisms and intact and permeabilized L1210 cells and as inhibitors of dihydrofolate reductase and thymidylate synthase derived from L. casei. The polyglutamylated derivatives of PDDF (1) were more active than the parent compound in inhibiting the growth of L. casei, thymidylate synthesis in permeabilized L1210 cells, and L. casei thymidylate synthase. Two analogues of 5,8-dideazafolic acid (2 and 3), one with a 2-butyne and another with a cyclopropylmethyl substituent at N10, were also synthesized and evaluated for their antifolate activities using the above-mentioned test systems. They were considerably less active than PDDF or its polyglutamylated derivatives. N10-Propargyl-5,8-dideazapteroyl tri-, tetra-, and pentaglutamates were equipotent with 5-fluorodeoxyuridylate as inhibitors of thymidylate synthesis in permeabilized L1210 cells. The polyglutamyl metabolites of PDDF were shown to be the most potent antifolate inhibitors of L. casei and L1210 thymidylate synthases yet described.
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