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Hung TC, Liu C, Tsai PC, Hsieh CC, Hsu PK, Huang CS, Hsu HS. Second primary head and neck cancer risk among patients with esophageal squamous cell carcinoma after curative esophagectomy. J Gastrointest Surg 2024; 28:167-169. [PMID: 38445939 DOI: 10.1016/j.gassur.2023.12.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 09/23/2023] [Accepted: 11/30/2023] [Indexed: 03/07/2024]
Affiliation(s)
- Ting-Chun Hung
- Division of Thoracic Surgery, Department of Surgery, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
| | - Chia Liu
- Division of Thoracic Surgery, Department of Surgery, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Ping-Chung Tsai
- Division of Thoracic Surgery, Department of Surgery, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan; School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan.
| | - Chih-Cheng Hsieh
- Division of Thoracic Surgery, Department of Surgery, Taipei Veterans General Hospital, Taipei, Taiwan; School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Po-Kuei Hsu
- Division of Thoracic Surgery, Department of Surgery, Taipei Veterans General Hospital, Taipei, Taiwan; School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Chien-Sheng Huang
- Division of Thoracic Surgery, Department of Surgery, Taipei Veterans General Hospital, Taipei, Taiwan; School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Han-Shui Hsu
- Division of Thoracic Surgery, Department of Surgery, Taipei Veterans General Hospital, Taipei, Taiwan; School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
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2
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Hung TC, Jassey A, Liu CH, Lin CJ, Lin CC, Wong SH, Wang JY, Yen MH, Lin LT. Corrigendum to Berberine inhibits hepatitis C virus entry by targeting the viral E2 glycoprotein. Phytomedicine 2022; 102:154128. [PMID: 35550221 DOI: 10.1016/j.phymed.2022.154128] [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] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Affiliation(s)
- Ting-Chun Hung
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Clinical Pathology, Chi Mei Medical Center, Tainan, Taiwan
| | - Alagie Jassey
- International Ph.D. Program in Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Ching-Hsuan Liu
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan; Department of Microbiology & Immunology, Dalhousie University, Halifax, NS, Abbreviation
| | - Chien-Ju Lin
- School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chun-Ching Lin
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan; School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Shu Hui Wong
- International Master Program in Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Jonathan Y Wang
- Department of Molecular Biosciences, The University of Texas at Austin, Austin, Texas, USA
| | - Ming-Hong Yen
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan; School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan.
| | - Liang-Tzung Lin
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan; Department of Microbiology and Immunology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.
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Chuang HY, Huang CC, Hung TC, Huang LY, Chiu CW, Chu KC, Liao JY, You TH, Wu CY, Chao P, Shivatare SS, Zeng YF, Tsai CS, Lin NH, Wu CY. Development of biotinylated and magnetic bead-immobilized enzymes for efficient glyco-engineering and isolation of antibodies. Bioorg Chem 2021; 112:104863. [PMID: 33823405 DOI: 10.1016/j.bioorg.2021.104863] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 03/21/2021] [Accepted: 03/22/2021] [Indexed: 11/17/2022]
Abstract
The chemoenzymatic remodeled monoclonal antidodies with well-defined glycan structure at the Fc domain display improved biological activities, such as ADCC and ADCP, and are more likely to yield a better safety profile by eliminating the non-human glycans derived from CHO cell culture. We covalently immobilize wild type endoglycosidase S (EndoS), fucosidase, and EndoS2 mutant on magnetic beads through a linker to efficiently generate homogeneous antibody glycoforms without additional purification step to remove endoglycosidase and fucosidase. We also used the biotinylated wild type EndoS2 and EndoS2 mutant in combination with covalently immobilized fucosidase on magnetic beads to allow the sequential removal of endoglycosidases and fucosidase for efficient glyco-engineering and isolation of antibodies without purifying deglycosylated antibody intermediate. Notably, the relatively expensive fucosidase can be recovered to reduce the cost, and the strong affinity of streptavidin to biotin would complete the isolation of biotinylated enzymes. We used Trastuzumab as a model to demonstrate both approaches were reliable for the large-scale production and isolation of antibodies without the residual contamination of endoglycosidase to avoid deglycosylation over storage time.
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Affiliation(s)
- Hong-Yang Chuang
- CHO Pharma Inc., 7F, Building C, No. 99, Ln. 130, Sec. 1, Academia Rd., Nangang Dist., Taipei City 115, Taiwan
| | - Chiu-Chen Huang
- CHO Pharma Inc., 7F, Building C, No. 99, Ln. 130, Sec. 1, Academia Rd., Nangang Dist., Taipei City 115, Taiwan
| | - Ting-Chun Hung
- CHO Pharma Inc., 7F, Building C, No. 99, Ln. 130, Sec. 1, Academia Rd., Nangang Dist., Taipei City 115, Taiwan
| | - Lin-Ya Huang
- CHO Pharma Inc., 7F, Building C, No. 99, Ln. 130, Sec. 1, Academia Rd., Nangang Dist., Taipei City 115, Taiwan
| | - Chih-Wei Chiu
- CHO Pharma Inc., 7F, Building C, No. 99, Ln. 130, Sec. 1, Academia Rd., Nangang Dist., Taipei City 115, Taiwan
| | - Kuo-Ching Chu
- CHO Pharma Inc., 7F, Building C, No. 99, Ln. 130, Sec. 1, Academia Rd., Nangang Dist., Taipei City 115, Taiwan
| | - Jung-Yu Liao
- CHO Pharma Inc., 7F, Building C, No. 99, Ln. 130, Sec. 1, Academia Rd., Nangang Dist., Taipei City 115, Taiwan
| | - Tsai-Hong You
- CHO Pharma Inc., 7F, Building C, No. 99, Ln. 130, Sec. 1, Academia Rd., Nangang Dist., Taipei City 115, Taiwan
| | - Chung-Yi Wu
- Genomics Research Center, Academia Sinica, 128 Academia Road, Section 2, Nankang, Taipei 115, Taiwan
| | - Ping Chao
- CHO Pharma Inc., 7F, Building C, No. 99, Ln. 130, Sec. 1, Academia Rd., Nangang Dist., Taipei City 115, Taiwan
| | - Sachin S Shivatare
- CHO Pharma Inc., 7F, Building C, No. 99, Ln. 130, Sec. 1, Academia Rd., Nangang Dist., Taipei City 115, Taiwan
| | - Yi-Fang Zeng
- CHO Pharma Inc., 7F, Building C, No. 99, Ln. 130, Sec. 1, Academia Rd., Nangang Dist., Taipei City 115, Taiwan
| | - Charng-Sheng Tsai
- CHO Pharma Inc., 7F, Building C, No. 99, Ln. 130, Sec. 1, Academia Rd., Nangang Dist., Taipei City 115, Taiwan
| | - Nan-Horng Lin
- CHO Pharma Inc., 7F, Building C, No. 99, Ln. 130, Sec. 1, Academia Rd., Nangang Dist., Taipei City 115, Taiwan
| | - Chung-Yi Wu
- CHO Pharma Inc., 7F, Building C, No. 99, Ln. 130, Sec. 1, Academia Rd., Nangang Dist., Taipei City 115, Taiwan; Genomics Research Center, Academia Sinica, 128 Academia Road, Section 2, Nankang, Taipei 115, Taiwan.
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Hung TC, Jassey A, Liu CH, Lin CJ, Lin CC, Wong SH, Wang JY, Yen MH, Lin LT. Berberine inhibits hepatitis C virus entry by targeting the viral E2 glycoprotein. Phytomedicine 2019; 53:62-69. [PMID: 30668413] [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] [Subscribe] [Scholar Register] [Received: 04/21/2018] [Revised: 07/13/2018] [Accepted: 09/03/2018] [Indexed: 06/09/2023]
Abstract
BACKGROUND Despite the advent of direct-acting antivirals (DAAs), HCV remains an important public health problem globally. There is at present no effective vaccine against the virus, and the DAAs in current use cannot prevent de novo infection, including in liver transplant setting wherein donor livers inevitably become re-infected. Developing inhibitors to HCV entry using nature-derived small molecules may help to expand/complement the current treatment options. PURPOSE In this study, we explored the effect of the plant alkaloid berberine (BBR) on HCV early viral entry. METHODS Cell culture-derived HCV (HCVcc), viral pseudoparticles bearing HCV glycoproteins (HCVpp), and entry-related assays were employed to assess BBR's bioactivity. Molecular docking was used to predict BBR-HCV glycoproteins interaction, and the compound's antiviral activity was confirmed against HCVcc infection of primary human hepatocytes (PHHs). RESULTS BBR specifically impeded HCVcc attachment and entry/fusion steps without inactivating the free virus particles or affecting the expression of host cell entry factors and post-entry viral replication. BBR also effectively inhibited infection by viral pseudoparticles expressing HCV E1/E2 glycoproteins and molecular docking analysis pointed at potential interaction with HCV E2. Finally, BBR could suppress HCVcc infection of PHHs. CONCLUSIONS We identified BBR as a potent HCV entry inhibitor, which merits further evaluation particularly for use in transplant setting against graft re-infection by HCV.
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Affiliation(s)
- Ting-Chun Hung
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Clinical Pathology, Chi Mei Medical Center, Tainan, Taiwan
| | - Alagie Jassey
- International Ph.D. Program in Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Ching-Hsuan Liu
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan; Department of Microbiology & Immunology, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Chien-Ju Lin
- School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chun-Ching Lin
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan; School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Shu Hui Wong
- International Master Program in Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Jonathan Y Wang
- Department of Molecular Biosciences, The University of Texas at Austin, Austin, Texas, United States of America
| | - Ming-Hong Yen
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan; Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan.
| | - Liang-Tzung Lin
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan; Department of Microbiology and Immunology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.
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Lin LT, Chung CY, Hsu WC, Chang SP, Hung TC, Shields J, Russell RS, Lin CC, Li CF, Yen MH, Tyrrell DLJ, Lin CC, Richardson CD. Saikosaponin b2 is a naturally occurring terpenoid that efficiently inhibits hepatitis C virus entry. J Hepatol 2015; 62:541-8. [PMID: 25450204 DOI: 10.1016/j.jhep.2014.10.040] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Revised: 10/07/2014] [Accepted: 10/22/2014] [Indexed: 12/04/2022]
Abstract
BACKGROUND & AIMS A vaccine against hepatitis C virus (HCV) is unavailable and cost-effective antivirals that prevent HCV infection and re-infection, such as in the transplant setting, do not exist. In a search for novel and economical prophylactic agents, we examined the antiviral activity of saikosaponins (SSa, SSb2, SSc, and SSd) from Bupleurum kaoi root (BK) as entry inhibitors against HCV infection. METHODS Infectious HCV culture systems were used to examine the effect of saikosaponins on the complete virus life cycle (entry, RNA replication/translation, and particle production). Antiviral activity against various HCV genotypes, clinical isolates, and infection of primary human hepatocytes were also evaluated. RESULTS BK and the saikosaponins potently inhibited HCV infection at non-cytotoxic concentrations. These natural agents targeted early steps of the viral life cycle, while leaving replication/translation, egress, and spread relatively unaffected. In particular, we identified SSb2 as an efficient inhibitor of early HCV entry, including neutralization of virus particles, preventing viral attachment, and inhibiting viral entry/fusion. Binding analysis, using soluble viral glycoproteins, demonstrated that SSb2 acted on HCV E2. Moreover, SSb2 inhibited infection by several genotypic strains and prevented binding of serum-derived HCV onto hepatoma cells. Finally, treatment with the compound blocked HCV infection of primary human hepatocytes. CONCLUSIONS Due to its potency, SSb2 may be of value for development as an antagonist of HCV entry and could be explored as prophylactic treatment during the course of liver transplantation.
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Affiliation(s)
- Liang-Tzung Lin
- Department of Microbiology and Immunology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan; Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan; Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Chueh-Yao Chung
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Wen-Chan Hsu
- School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Shun-Pang Chang
- School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Ting-Chun Hung
- Department of Clinical Pathology, Chi-Mei Medical Center, Tainan, Taiwan
| | - Justin Shields
- Li Ka Shing Institute of Virology, Edmonton, Alberta, Canada
| | - Rodney S Russell
- Immunology and Infectious Diseases, Faculty of Medicine, Memorial University of Newfoundland, St. John's, Newfoundland, Canada
| | - Chih-Chan Lin
- Department of Medical Research, Chi-Mei Medical Center, Tainan, Taiwan
| | - Chien-Feng Li
- Department of Medical Research, Chi-Mei Medical Center, Tainan, Taiwan
| | - Ming-Hong Yen
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan
| | | | - Chun-Ching Lin
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan; School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan.
| | - Christopher D Richardson
- Department of Pediatrics and Canadian Center for Vaccinology, Izaak Walton Killam Health Centre, Halifax, Nova Scotia, Canada; Department of Microbiology and Immunology, Dalhousie University, Halifax, Nova Scotia, Canada.
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Chou ML, Burnouf T, Chang SP, Hung TC, Lin CC, Richardson CD, Lin LT. TnBP⁄Triton X-45 treatment of plasma for transfusion efficiently inactivates hepatitis C virus. PLoS One 2015; 10:e0117800. [PMID: 25658612 PMCID: PMC4320006 DOI: 10.1371/journal.pone.0117800] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [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: 08/19/2014] [Accepted: 01/01/2015] [Indexed: 12/17/2022] Open
Abstract
Risk of transmission of hepatitis C virus (HCV) by clinical plasma remains high in countries with a high prevalence of hepatitis C, justifying the implementation of viral inactivation treatments. In this study, we assessed the extent of inactivation of HCV during minipool solvent/detergent (SD; 1% TnBP / 1% Triton X-45) treatment of human plasma. Luciferase-tagged infectious cell culture-derived HCV (HCVcc) particles were used to spike human plasma prior to treatment by SD at 31 ± 0.5°C for 30 min. Samples were taken before and after SD treatment and filtered on a Sep-Pak Plus C18 cartridge to remove the SD agents. Risk of cytotoxicity was assessed by XTT cell viability assay. Viral infectivity was analyzed based on the luciferase signals, 50% tissue culture infectious dose viral titer, and immunofluorescence staining for HCV NS5A protein. Total protein, cholesterol, and triglyceride contents were determined before and after SD treatment and C18 cartridge filtration. Binding analysis, using patient-derived HCV clinical isolates, was also examined to validate the efficacy of the inactivation by SD. SD treatment effectively inactivated HCVcc within 30 min, as demonstrated by the baseline level of reporter signals, total loss of viral infectivity, and absence of viral protein NS5A. SD specifically targeted HCV particles to render them inactive, with essentially no effect on plasma protein content and hemostatic function. More importantly, the efficacy of the SD inactivation method was confirmed against various genotypes of patient-derived HCV clinical isolates and against HCVcc infection of primary human hepatocytes. Therefore, treatment by 1% TnBP / 1% Triton X-45 at 31°C is highly efficient to inactivate HCV in plasma for transfusion, showing its capacity to enhance the safety of therapeutic plasma products. We propose that the methodology used here to study HCV infectivity can be valuable in the validation of viral inactivation and removal processes of human plasma-derived products.
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Affiliation(s)
- Ming-Li Chou
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Thierry Burnouf
- Graduate Institute of Biomedical Materials and Tissue Engineering, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan
| | - Shun-Pang Chang
- School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Ting-Chun Hung
- Department of Clinical Pathology, Chi-Mei Medical Center, Tainan, Taiwan
| | - Chun-Ching Lin
- School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Christopher D. Richardson
- Department of Pediatrics and Canadian Center for Vaccinology, Izaak Walton Killam Health Centre, Halifax, Nova Scotia, Canada
| | - Liang-Tzung Lin
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Department of Microbiology and Immunology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- * E-mail:
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Abstract
SSEA-4, a sialyl-glycolipid, has been commonly used as a pluripotent human embryonic stem cell marker, and its expression is correlated with the metastasis of some malignant tumors. However, there is no in-depth functional study related to the receptor and the role of this glycolipid. Here, we report the identification of an SSEA-4-binding protein in a breast cancer cell line, MCF-7. By using affinity capture and glycan microarray techniques, the intracellular FK-506 binding protein 4 (FKBP4) was identified to bind directly to SSEA-4. The biological significance of SSEA-4/FKBP4 interaction was investigated.
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Affiliation(s)
- Ting-Chun Hung
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
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Hung TC, Lu SK, Su CH, Wu YJ, Hsieh CL, Lee WH, Tsai CH, Yeh HI. Remodeling of rabbit abdominal aorta and Cx43 gap junctions after stent placement: effect of balloon injury plus cholesterol-enriched diet. INT ANGIOL 2012; 31:62-69. [PMID: 22330626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
AIM To examine the effect of stenting and cholesterol-enriched diet (CED) on vascular remodeling, including the expression of connexin43 (Cx43) gap junctions in smooth muscle cells (SMC). METHODS Rabbits abdominal aortae were either implanted stent made of 316 stainless steel (group 1) or denuded followed by stent placement 28 days later (groups 2 and 3). Animals were given normal chow except those of group 3, which were fed CED after the denudation. Eight weeks later, the development of neointima and the expression of connexin43 (Cx43) were examined. In parallel, human aortic SMC were grown on 316 stainless steel or treated with C-reactive protein (CRP) followed by analysis of Cx43. RESULTS The results showed that, serum CRP levels became transiently elevated after denudation and stent implantation. For the stented aortic segments, the dimensions of neointima were group 3 > group 2 > group 1 (P<0.05). In groups 1 and 2, Cx43 gap junctions are less in amount in neointima of the stented segment, compared to the unstented upstream neointima or medial layer (all P<0.01). In culture experiments, Cx43 in SMC grown on stent material was up-regulated in growth medium but down-regulated in differentiation medium, and CRP did not affect Cx43 expression. CONCLUSION Vascular remodeling post stent implantation varied according to the presence of balloon injury, CED, or both. Cx43 expression in SMC is altered after exposure to stent and the regulation depended on the milieu.
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MESH Headings
- Angioplasty, Balloon/instrumentation
- Animals
- Aorta, Abdominal/injuries
- Aorta, Abdominal/metabolism
- Aorta, Abdominal/pathology
- C-Reactive Protein/metabolism
- Cell Culture Techniques
- Cells, Cultured
- Cholesterol, Dietary/blood
- Connexin 43/metabolism
- Disease Models, Animal
- Gap Junctions/metabolism
- Gap Junctions/pathology
- Hypercholesterolemia/blood
- Hypercholesterolemia/complications
- Hypercholesterolemia/etiology
- Male
- Muscle, Smooth, Vascular/injuries
- Muscle, Smooth, Vascular/metabolism
- Muscle, Smooth, Vascular/pathology
- Myocytes, Smooth Muscle/metabolism
- Myocytes, Smooth Muscle/pathology
- Neointima/etiology
- Neointima/metabolism
- Neointima/pathology
- Prosthesis Design
- Rabbits
- Stainless Steel
- Stents
- Time Factors
- Vascular System Injuries/etiology
- Vascular System Injuries/metabolism
- Vascular System Injuries/pathology
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Affiliation(s)
- T C Hung
- Department of Internal Medicine and Medical Research, Mackay Memorial Hospital, Taipei, Taiwan
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9
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Hung TC, Meng PJ, Han BC, Chuang A, Huang CC. Trace metals in different species of mollusca, water and sediments from Taiwan coastal area. Chemosphere 2001; 44:833-841. [PMID: 11482676 DOI: 10.1016/s0045-6535(00)00491-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Since October 1994, a long-term program of Asia/Pacific Mussel Watch: Taiwan Regional Studies has been carried out. The results indicate that trace metal contents in mollusca varied among 30 different species and the environments (water and sediments) along the Taiwan coast. The orders of bioaccumulation of trace metals in mollusca were: Cu (over 200 microg/g), Thais clavigera > Isognomon legumen > Clibanarius rivescens > Crassostrea gigas; Zn (over 700 microg/g), Moruta granulata > C. gigas > Asiatica cypraea arabica > T. clavigera; Cd (over 5 microg/g), Trochus hanleyanus > Acanthopleura japonica > Nerita albicilla > Patella flexuosa; Pb (over 2 microg/g), P. flexuosa > C. gigas > T. hanleyanus > T. clavigera > C. gigas > Capiyulum mitella; Ni (over 10 microg/g), Meretrix lusoria > Philine sp. > Littoraria scabra > Tridacna squamosa > T. hanleyanus; Cr (over 30 microg/g), Littoraria undulata > T. hanleyanus > N. albicilla > Nerita chamaelor > M. granulata; As (over 20 microg/g), Perna viridis > L. scabra; and Sn (over 5 microg/g), P. viridis > L. undulata> C. mitella> C. gigas. Their seasonal and regional variations as well as their correlation are evaluated and discussed.
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Affiliation(s)
- T C Hung
- Institute of Chemistry, Academia Sinica, Taipei, Taiwan, ROC.
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10
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Hung TC, Hsu WK, Mang PJ, Chuang A. Organotins and imposex in the rock shell, Thais clavigera, from oyster mariculture areas in Taiwan. Environ Pollut 2001; 112:145-152. [PMID: 11234530 DOI: 10.1016/s0269-7491(00)00123-8] [Citation(s) in RCA: 15] [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] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The amounts of organotin compounds such as butyltins [sigma BTs: tributyl- (TBT), dibutyl- (DBT), monobutyl- (MBT)] and phenyltins [sigma PhTs: triphenyl- (TPhT), diphenyl- (DPhT) and monophenyl- (MPhT)] in rock shells, Thais clavigera, from the northern (Shiangsan), central (Lukang) and southern (Chiku) Taiwan oyster mariculture areas varied with season and location. High values of sigma BTs (mainly TBT) and low values of sigma PhTs (mainly TPhT) were found during winter (January 1999) at Shiangsan, while high amounts of sigma PhTs (mainly TPhT) and low sigma BTs (mainly TBT) were found during summer (August 1998) at Lukang. The snails were also affected by imposex. Imposex at Shiangsan, Lukang and Chiku increased from 67.1, 59.3 and 36.7% in summer to 100, 100 and 80% in winter, respectively. Relative penis size indices similar trend at Chiku site. No male displayed rock shells were found at Shiangsan and Lukang in winter. Linear correlations between pseudopenis length versus TBT (r = 0.7655, P < 0.001), DBT (r = 0.4253, P < 0.05), MBT (r = 0.5865, P < 0.01) and TPhT (r = -0.6160, P < 0.01) were obtained significant. Among 200 samples, significant positive correlations between length (pseudopenis/shell) ratio of female versus TBT (r = 0.6944, P < 0.005) and sigma BTs (r = 0.6413, r < 0.01) were also observed. The weak correlations between length (pseudopenis/shell) ratio of female versus DBT (r = 0.3085) and MBT (r = 0.4240, P < 0.1) and TPhT (-0.4917, P < 0.05; negative correlation) could indicate that DBT, MBT and TPhT have little or no effect on the development of imposex in rock shells.
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Affiliation(s)
- T C Hung
- Institute of Oceanography, National Taiwan University, Taipei 107, Taiwan.
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11
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Jeng MS, Jeng WL, Hung TC, Yeh CY, Tseng RJ, Meng PJ, Han BC. Mussel watch: a review of Cu and other metals in various marine organisms in Taiwan, 1991-98. Environ Pollut 2000; 110:207-215. [PMID: 15092835 DOI: 10.1016/s0269-7491(99)00304-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/1998] [Accepted: 11/05/1999] [Indexed: 05/24/2023]
Abstract
This study presents the distribution of Cu, Zn, Pb, Cd, Hg and As in various marine organisms collected along the western coast of Taiwan from 1991 to 1998, and also evaluates the time variation of Cu in oysters before (1980-85) and after (1986-98) the "green oyster" incident. The results show that relatively high geometric mean (GM) concentrations of Cu, Zn, Pb, Cd, As and Hg were generally found in Crassostrea gigas (Cu=229 microg/g, Zn=783 microg/g), Gomphina aeguialtera (Pb=30.3 microg/g), Tegillarca granosa (Cd=2.85 microg/g), Thais clavigera (As=96.9 microg/g) and Parapenaeopsis cornuta (Hg=1.35 microg/g), respectively. Especially, maximum Cu and Zn concentrations (GM=229 and 783 microg/g, respectively) in oysters (C. gigas) from different culture areas were much higher than those of the other organisms by about 1.13-458 and 2.40-63.7 times, respectively. Similarly, rock-shells (Thais clavigera) had a high capacity for accumulating Cu (GM=202 microg/g) and Zn (GM=326 microg/g) under the same physico-chemical conditions. The highest GM Cu and Zn concentrations of 1108 (range from 113 to 2806) and 1567 (range from 303 to 3593) microg/g were obtained in oysters from the Hsiangshan coastal area, one of the most important oyster culture areas in Taiwan. However, the highest GM Cd and As concentrations of 6.82 and 19.3 microg/g were found in oysters from the Machu Islands. Mean Cu concentrations in the oysters from the Erhjin Chi estuary declined from 2194+/-212 microg/g in 1986-90 to 545 microg/g (GM) in 1991-96. In the Hsiganshan area, GM Cu concentrations of 909 microg/g (1991-96) and 1351 microg/g (1997-98) in oysters were significantly higher than those of 201 microg/g (1980-85) and 682 microg/g (1986-90). The gradually increasing levels of Cu and Zn in the oysters from the Hsiangshan area have been observed year by year.
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Affiliation(s)
- M S Jeng
- Institute of Zoology, Academia Sinica, Taipei, Taiwan
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Han BC, Jeng WL, Hung TC, Ling YC, Shieh MJ, Chien LC. Estimation of metal and organochlorine pesticide exposures and potential health threat by consumption of oysters in Taiwan. Environ Pollut 2000; 109:147-156. [PMID: 15092922 DOI: 10.1016/s0269-7491(99)00236-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/1999] [Accepted: 08/04/1999] [Indexed: 05/24/2023]
Abstract
Pollutant concentrations detected in oysters from 12 different culture areas of Taiwan (especially for the Hsiangshan area and the Machu Islands) from 1991-98 were evaluated to investigate potential carcinogenic (inorganic As and organochlorine pesticides) and non-carcinogenic (Cu, Zn, Cd and inorganic As) risk to the public from ingestion of the oysters. The highest geometric mean (GM) Cu and Zn concentrations of 1108 (range 113-2806) and 1567 (range 303-3593) microg/g dry weight were obtained in oysters from the Hsiangshan coastal area. The maximum GM Cd and As concentrations of 6.82 and 19.3 microg/g dry weight were found in oysters from the Machu Islands area. The p,p'-DDE values range from not detectable in Penghu Islands' oysters to 164 ng/g dry weight in Machu Islands' oysters. The highest tDDT (sum of p,p'-DDE, p,p'-DDD and p,p'-DDT) concentrations of 337 and 340 ng/g dry weight were found in oysters from Kimmen and Machu Islands, respectively. A calculated target hazard quotient (THQ; daily intake/reference dose) of 11.4 (based on 139 g oysters/day) for Cu caused by consuming oysters from the Hsiangshan area is higher than that from other areas (range 0.124-5.95). The highest average Cu intake from Hsiangshan's oysters for individuals is 11.4 times (i.e. THQ=11.4) more than that of reference dose (40 microg/kg/day). However, the maximum THQ values for Cd and As caused by consuming oysters collected from the Machu Islands were 5.57 and 2.63 for Cd and As, respectively. Generally, the results of THQ showed that if only the maximally exposed individuals were considered, the value of 65.4% for oyster was higher than 1.0 in comparison with reference dose. All cancer risk estimates for inorganic As from consuming oysters were higher than 10(-6) (range from 128x10(-6) to 509x10(-6) for maximally exposed individuals and range from 17.1x10(-6) to 68.0x10(-6) for typically exposed individuals, respectively); that is the risk of the lower end of the range of acceptable risk. The highest risk estimate for inorganic As was 509x10(-6) for consumption of oysters by Machu Islands' residents. The lifetime cancer risks of 19.0x10(-6) for tDDT by consuming oysters from the Machu Islands was higher than those from the Penghu Islands (0.37x10(-6)). Therefore, the sum of lifetime cancer risks for tDDT and inorganic As had the highest risks (total risk=528x10(-6)) of consuming oysters from the Machu Islands. Furthermore, a 10(-6) upper limit on lifetime risk as the health protection standard would require maximum oyster consumption rates of approximately 0.26 g/day.
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Affiliation(s)
- B C Han
- School of Public Health, Taipei Medical College, 250 Wu-Hsing Street, Taipei, Taiwan.
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Hung TC, Lin HC, Lin KJ, Kuo HP. 133Xenon ventilation scan as a functional assessment in bronchiectasis. Changgeng Yi Xue Za Zhi 1998; 21:403-8. [PMID: 10074725] [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: 02/11/2023]
Abstract
BACKGROUND Mucus impaction in the airways impairs ventilation and exercise tolerance in patients with bronchiectasis. Parameters for evaluating the ventilatory dynamic change have been limited by variable cofactors. We developed a tool to evaluate the changes directly on images of a ventilation scan. MATERIALS AND METHODS We used a 133Xenon ventilation washout scan to assess the time of half clearance (T1/2) of the regions of interest (ROIs) corrected by that of a control area (CA) as T1/2ROI/CA. We then compared the ventilation washout scan with high-resolution computer tomography (HRCT) scoring to assess the severity of bronchiectasis, as well as conducting 6-minute walking tests or spirometry for the evaluation of the clinical response to a 3-day course of chest physiotherapy. Nine patients with bronchiectasis and mucus hypersecretion were enrolled in this study. RESULTS The functional impairments by mucus impaction or air trapping were well documented in the ventilation washout scan, which not only provided an anatomical image but also dynamic profiles. The ratios of T1/2ROI/CA were significantly correlated to the corresponding scoring of HRCT (3.45 +/- 0.85 vs 7.50 +/- 1.51, r2 = 0.61, p = 0.023, n = 8). The improvement in T1/2ROI/CA (from 3.45 +/- 0.85 to 2.60 +/- 0.59, p = 0.022, n = 9) was paralleled by an increase in the 6-minute walking test (from 310.4 +/- 43.2 m to 352.4 +/- 45.1 m, p = 0.028, n = 7). CONCLUSION The 133Xenon scan may be used to evaluate the heterogeneity of ventilation abnormalities and the efficacy of clinical therapy directly in patients with bronchiectasis.
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Affiliation(s)
- T C Hung
- Department of Internal Medicine, Chang Gung Memorial Hospital, Taipei, Taiwan, R.O.C
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Han B, Jeng WL, Chen RY, Fang GT, Hung TC, Tseng RJ. Estimation of target hazard quotients and potential health risks for metals by consumption of seafood in Taiwan. Arch Environ Contam Toxicol 1998; 35:711-720. [PMID: 9776791 DOI: 10.1007/s002449900535] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The purpose of this paper is to describe the impact of metal pollution on the main seafood and assess the potential health risk from consuming the contaminated seafood in Taiwan. The results of geometric mean (GM) metal concentrations in various seafood showed that the copper, zinc, and arsenic concentrations in oysters were significantly (p < 0.001) higher than those in the other seafood by about 1,057, 74.3, and 56.2 times, respectively. The green color found in the oysters was due to high GM copper and zinc concentrations of 909 (ranging from 113-2,805) and 1,293 (ranging from 303-3,593) microg/g dry wt, respectively. In addition, using a maximum consumption rate of 139 g/day of oysters for individuals, calculations yield target hazard quotients (daily intake/reference dose) of below 1 for cadmium and mercury and high values of 1.61, 9. 33, and 1.77 for inorganic arsenic, copper, and zinc in adults, respectively. The various lifetime cancer risks for inorganic arsenic (maximum exposed individuals risk ranging from 9.93 x 10(-6) to 3.11 x 10(-4)) might be caused by consuming different seafood in Taiwan. The highest risk estimate for inorganic arsenic was 5.10 x 10(-4) for consumption of oysters by Machu Islands residents. The long-term exposure of metals through consumption of oysters, especially for some high-risk groups, could be dangerous. Taking inorganic arsenic for example, a 10(-6) upper limit on lifetime risk as the health protection standard would require maximum oyster residue levels of approximately 0.0076-0.056 microg/g wet wt, for consumption rates of 139-18.6 g/d. In the light of known risks to public health, the government should issue an immediate warning to the public to refrain from eating all seafood harvested from the Taiwan coastal areas, especially the Hsiangshan area and the Machu Islands.
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Affiliation(s)
- B Han
- School of Public Health, Taipei Medical College, 250, Wu-Hsing Street, Taipei, Taiwan, Republic of China
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Han BC, Jeng WL, Hung TC, Wen MY. Relationship between copper speciation in sediments and bioaccumulation by marine bivalves of Taiwan. Environ Pollut 1996; 91:35-39. [PMID: 15091451 DOI: 10.1016/0269-7491(95)00031-l] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/1994] [Accepted: 04/07/1995] [Indexed: 05/24/2023]
Abstract
This paper evaluates the relationships between copper species in sediments and accumulation by the purple clam (Hiatula diphos) and venus clam (Gomphina aeguilatera) collected from the field and culture (aquaculture) ponds in the polluted coastal area of Lukang, Taiwan. Sediment was sampled along with the molluscs, including oysters (Crassostrea gigas), purple clams (Hiatula diphos), rock-shells (Thais clavigera), venus clams (Gomphina aeguilatera), and hard clams (Meretrix lusoria), from two unique environments of Lukang during the period from August 1993 to July 1994. The data indicate that the total copper concentrations in sediments from culture ponds (185 microg g(-1)) was higher than those of the field (44.0 microg g(-1)). Copper species in sediments were analyzed by a sequential leaching technique. Results show that concentrations of various copper species in the sediments are in the range of 1.14 +/- 0.59 to 13.2 +/- 22.4 microg g(-1) and 0.36 +/- 0.24 to 133 +/- 36.7 microg g(-1) for the two environments, respectively. Also the exchangeable copper in sediment from culture ponds was 15 times higher than that from the field. In addition, the sum of exchangeable and copper carbonates had the highest percentages of copper in both the pond sediment (86.6 %) and the field sediment (50.7 %). Maximum copper concentrations (309 +/- 35.1 microg g(-1)) in oysters were much higher than those in the other benthic organisms by about 4-127 times. Similarly, the data also showed that copper concentrations in Thais clavigera were 12-32 times higher than those in other benthic organisms. Copper concentrations in various benthic organisms differed significantly (p < 0.05) from that in Thais clavigera. This capacity makes Thais clavigera a potential candidate for monitoring copper in marine sediments. In terms of copper species, the best correlation was generally obtained between copper carbonates in sediments and copper concentrations in Hiatula diphos (r = 0.886*). A strong multiple regression correlation (p < 0.05, r2 = 0.7894) also indicates that the copper carbonates may dominate as the available form of copper to Hiatula diphos from various environments in the Lukang coastal area under natural physicochemical conditions.
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Affiliation(s)
- B C Han
- School of Public Health, Taipei Medical College, Taipei, Taiwan, Republic of China
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Hung TC, Meng PJ, Wu SJ. Species of copper and zinc in sediments collected from the antarctic ocean and the Taiwan Erhjin Chi coastal area. Environ Pollut 1993; 80:223-230. [PMID: 15091841 DOI: 10.1016/0269-7491(93)90042-m] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/1991] [Accepted: 03/09/1992] [Indexed: 05/24/2023]
Abstract
The species of copper and zinc, such as bioexchangeable, skeletal, easily reducible (Fe and Mn oxides), moderately reducible (crystalline Mn oxide), organic combined with sulfides, and detritus with minerals, in mud and sand, separated from the surface Antarctic Ocean and the Taiwan Erhjin Chi coastal (including river and estuarine) sediments, have been analyzed by sequential leaching methods. Results show that in the Antarctic Ocean sediments, high concentrations of total copper (128 mg/kg) and zinc (458 mg/kg) were found in the high mud (99.09%) content samples compared with the low concentrations of total copper (83.8 mg/kg) and zinc (288 mg/kg) in low mud (51.69%) content samples. High concentrations of copper, zinc, manganese and iron are possibly due to the characteristics of manganese nodules, in which the species of copper and zinc are mainly contained in the crystalline Mn oxide phase. In the Taiwan Erhjin Chi coastal sediments, the total copper and zinc concentrations in mud and sand vary with season and location. High values were generally observed in the river sediments during the dry season, and low values were in the estuarine and coastal sediments during the heavy rainy season. High percentages of copper (as high as 49.4%) and zinc (as high as 76.7%) in mud and sand were in the bioexchangeable phase including the skeletal phase. This result might be correlated with the problems arising from human impact on copper and zinc as well as sewage pollution in Taiwan. In the organic combined phase, biogenic particulate matter related to higher primary productivity in the Antarctic Ocean is also discussed.
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Affiliation(s)
- T C Hung
- Institute of Chemistry, Academia Sinica, Taipei, Taiwan
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Hung TC, Butter DB, Yie CL, Kormos RL, Borovetz HS, Griffith BP, Hardesty RL. Effects of long-term Novacor artificial heart support on blood rheology. ASAIO Trans 1991; 37:M312-3. [PMID: 1751165] [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: 12/28/2022]
Abstract
This study presents characteristics of hemorheology for six patients during long-term support (85-144 days) on a Novacor left ventricular assist device (LVAD) as a bridge-to-cardiac transplantation. Results indicate that a certain "baseline" rheology can be identified in patients whose support was uneventful. However, in the patients who had one or more neurologic episodes during support, these events were associated with altered hemorheology, including increases in plasma and relative blood viscosity, and red cell rigidity.
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Affiliation(s)
- T C Hung
- Department of Neurosurgery, University of Pittsburgh, Pennsylvania 15261
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18
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Hung TC, Pham S, Steed DL, Webster MW, Butter DB. Alterations in erythrocyte rheology in patients with severe peripheral vascular disease: 1. Cell volume dependence of erythrocyte rigidity. Angiology 1991; 42:210-7. [PMID: 2018242 DOI: 10.1177/000331979104200305] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The erythrocyte rigidity of patients suffering from severe peripheral vascular disease (PVD) was measured by a filtration method using 3 microns pore size filters. Filtration pressures for both PVD patients and normal subjects showed a cell volume dependency, and patient filtration pressures were normalized to cell volume to evaluate intrinsic, ie, nonvolume dependent, abnormalities in erythrocyte deformability. A significant (p less than 0.001) increase in cell rigidity was found in 44 of 54 PVD patients in comparison with volume-matched normal controls. No significant difference was found between patient mean corpusculer hemoglobin (MCH) and normal MCH at any given mean corpuscular volume (MCV), indicating that observed increases in erythrocyte rigidity are not attributable to changes in patient MCH. Therefore, the mechanism of increase in erythrocyte rigidity for PVD patients still needs further investigation into such parameters as levels of adenosine triphosphate,2,3-DPG, and membrane fluidity (calcium- and/or protein-binding membrane, cholesterol and phospholipid content of membrane, etc), as well as other aspects of erythrocyte physiology.
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Affiliation(s)
- T C Hung
- School of Medicine, University of Pittsburgh, Pennsylvania
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Hung TC, Butter DB, Yie CL, Sun Z, Borovetz HS, Kormos RL, Griffith BP, Hardesty RL. Interim use of Jarvik-7 and Novacor artificial heart: blood rheology and transient ischemic attacks (TIA's). Biorheology 1991; 28:9-25. [PMID: 2049535 DOI: 10.3233/bir-1991-281-203] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The rheological properties of blood were studied in patients supported by both the Jarvik-7 total artificial heart (TAH) and Novacor left ventricular assist device (LVAD) as a bridge to cardiac transplantation. Both groups of patients had abnormalities in blood rheology which differed according to the type of device implanted as well as on the clinical state of the patient. The rheology of individual patients correlated well with their clinical status and outcome, with incidences of TIA's and/or stroke being accompanied by marked increases in relative blood viscosity, erythrocyte rigidity, fibrinogen concentration and platelet aggregation in varying combination. Observed abnormalities in blood rheology were also crucial to thrombus formation on artificial heart valves as well. Our results show that the therapeutic management of rheological parameters should prove to be a unique and clinically rewarding approach to these patients.
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Affiliation(s)
- T C Hung
- Department of Neurosurgery, School of Medicine, University of Pittsburgh, PA 15261
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20
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Hung TC, Borovetz HS, Kormos RL, Butter DB, Yie CL, Pristas JM, Griffith BP, Hardesty RL. Artificial heart. Hemorrheology and transient ischemic attacks. ASAIO Trans 1990; 36:M132-5. [PMID: 2252642] [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: 12/31/2022]
Abstract
Hemorrheology was studied in patients undergoing artificial heart support as a bridge-to-cardiac transplantation. Abnormal hemorrheology was seen in two patients, one on a Jarvik-7 total artificial heart, and the other on a Novacor left ventricular assist device. Both of these patients suffered neurologic episodes. The rheology of these two patients coincided well with their clinical status, and was accompanied by marked increases in relative blood viscosity, erythrocyte rigidity, fibrinogen concentration, and platelet aggregation. Results show that improving hemorrheology may be a beneficial avenue to pursue in preventing or treating transient ischemic attacks or other complications in patients during support with mechanical devices.
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Affiliation(s)
- T C Hung
- Department of Neurosurgery, School of Medicine, University of Pittsburgh, Pennsylvania 15261
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21
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Han BC, Hung TC. Green oysters caused by copper pollution on the Taiwan coast. Environ Pollut 1990; 65:347-362. [PMID: 15092258 DOI: 10.1016/0269-7491(90)90126-w] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/1989] [Accepted: 02/16/1990] [Indexed: 05/24/2023]
Abstract
The first case of green oysters (Crassostrea gigas) broke out along the Charting mariculture area of south-western Taiwan in January 1986. The green color was found to be due to high copper content in the oyster tissue. Since then, a long-term survey around this area shows that total dissolved copper ranges from 4.99 to 23.6 microg/liter and particulate copper ranges from 1.09 to 5.51 microg/liter in sea-water. The green oysters collected from the Erhjin Chi estuary on 26 January, 1989 gave the highest copper content, 4401+/-79 ppm dry wt. Other green oyster cases were occasionally observed in the Hsiangsan and Anpin mariculture areas. Meanwhile, an experiment of copper accumulation in oysters was conducted at three stations (south-western Taiwan) for up to 90 days. Multiple regression analysis indicates that the food pathway may predominate in copper accumulation by green oysters. This bioaccumulation experiment shows that the total uptake of copper per oyster is an exponential function of exposure time for the first 2 weeks with an accumulation rate of 214 ppm Cu/day and then levels off. The average values of concentration factors for oysters (about 5 x 10(5)) were very close to steady-state values under the natural conditions at each station.
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Affiliation(s)
- B C Han
- Institute of Oceanography, National Taiwan University, Taipei, Taiwan
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Hung TC, Butter DB, Kormos RL, Sun Z, Borovetz HS, Griffith BP, Yie CL. Characteristics of blood rheology in patients during Novacor left ventricular assist system support. ASAIO Trans 1989; 35:611-3. [PMID: 2597548 DOI: 10.1097/00002480-198907000-00144] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Blood rheologic properties were studied in 11 patients on Novacor LVAS support (1-126 days) as a bridge to transplantation. Overall, these patients showed slight increases in mean blood viscosity and red cell rigidity. Their mean plasma fibrinogen was in the upper normal range. However, the degree of rheologic change observed, and the individual factors affected most, were unique to each patient and hemorheologic results correlated well with the patient's clinical status.
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Affiliation(s)
- T C Hung
- Department of Neurosurgery, School of Medicine, University of Pittsburgh, PA 15213
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Frattini PL, Wachter C, Hung TC, Kormos RL, Griffith BP, Borovetz HS. Erythrocyte deformability in patients on left ventricular assist systems. ASAIO Trans 1989; 35:733-5. [PMID: 2597578 DOI: 10.1097/00002480-198907000-00183] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Preliminary hemorheologic studies using clinical filtration techniques on blood cell suspensions have suggested that changes in erythrocyte (RBC) deformability occur during left ventricular assist system (LVAS) support. In the biophysics literature, it is generally accepted that the elastic properties of the RBC membrane complex affect the microcirculatory deformability of the whole cell (cytoplasmic pathologies excepted). This paper compares single cell measurements of the surface shear elastic modulus, mu, of the RBC membrane complex (determined using micropipette aspiration) to available clinical filtration pressure data during Novacor LVAS support, over 33 and 126 days in four patients.
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Affiliation(s)
- P L Frattini
- Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213
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Kormos RL, Borovetz HS, Griffith BP, Hung TC. Rheologic abnormalities in patients with the Jarvik-7 total artificial heart. ASAIO Trans 1987; 33:413-7. [PMID: 3314930] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- R L Kormos
- Department of Surgery, University of Pittsburgh School of Medicine, PA 15261
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Hung TC, Chang K, Chang CC, Chuang CY, Hsu CT. Changes of serum protein and immunoglobulins in ovarian agenesis. Int J Gynaecol Obstet 1983; 21:403-7. [PMID: 6141098 DOI: 10.1016/0020-7292(83)90008-5] [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: 01/18/2023]
Abstract
The levels of serum proteins and immunoglobulins were determined in five cases of Turner's syndrome, in five secondary amenorrheic patients who responded to progesterone, and in five healthy women as controls. Compared with the controls, the patients with secondary amenorrhea showed significantly lower albumin, but higher alpha 1- and beta-globulins; IgG was also lower. In the Turner's syndrome group, gamma globulin, IgG and IgM levels were significantly lower. These results support the suggestion that at least some of the serum proteins and immunoglobulins are related to estrogen.
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Hung TC, Chang CC, Hsu CT, Chuang CY. Changes of serum protein and immunoglobulin in toxemia of pregnancy. Zhonghua Min Guo Wei Sheng Wu Ji Mian Yi Xue Za Zhi 1980; 13:143-8. [PMID: 7449530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The immune mechanism theoretically may play an important role in toxemia of pregnancy. Serum proteins, immunoglobulins and C3 were measured in 20 women with normal pregnancy and in 10 women with toxemia of pregnancy. Compared with the normal pregnancy, the toxemia group exhibited decreased albumin and IgG, and significant increases in alpha 1 globulin and IgE. The immunological implication of these changes deserves further investigation.
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Dewitz TS, Hung TC, Martin RR, McIntire LV. Mechanical trauma in leukocytes. J Lab Clin Med 1977; 90:728-36. [PMID: 903701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Mechanical and surface traumas in cardiopulmonary bypass circuits alter the function and morphology of human leukocytes. The effect of controlled in vitro shear stess (0 to 2,000 dynes/cm2, 2 to 10 min, 37 degrees C) on electronic cell count, morphology, adhesiveness, and phosphatase cytochemical staining was studied on whole blood from normal donors. Electronic cell counts droppped significantly after shear stress exposure (25% at 600 dynes/cm2 for 10 min). The frequency of disrupted leukocytes in blood smears increased with shear stress above 150 dynes/cm2, and aggregates of the disrupted cells appeared after exposure to higher shear stresses (450 dynes/cm2, 10 min). Cytochemical staining of the alkaline phosphatase in the granules of intact neutrophils was significantly reduced by the application of shear stress (150 dynes/cm2 for 10 min, or greater), but staining of acid phosphatase-containing granules was almost unaffected. Increased cell retention in columns of nylon fibers suggests that increased leukocyte adhesiveness results from exposure to shear stress. Thus exposure to shear stress may alter or disrupt leukocyte morphology and function at values somewhat lower than the 1,500 dynes/cm2 for 2 min which is required to hemolyze erythrocytes.
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