1001
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Zhu XD, Guo JQ, Chen YC, Tang CJ, Xue GX. Ten-year experience with pericardial xenograft valves. J Thorac Cardiovasc Surg 1988; 95:572-6. [PMID: 3352290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Five hundred fifty-three pericardial xenografts were inserted in 520 patients during a 9-year period at the Fu Wai Hospital in Beijing. The bovine pericardial xenograft was modeled after a similar type of prosthesis manufactured by Shiley Inc. (Irvine, Calif.). The late mortality rate in this series was only 1.8% per annum and the actuarial survival rate was 73.0% +/- 12% at 10 years. There was a very acceptable low incidence of thromboembolism of 0.41% per annum without the need for permanent anticoagulation. This is similar to the clinical reports with other tissue valves. The main question is the durability of the tissue prosthesis or, in other words, the freedom from valve-related clinical complications. In this series, the expected actuarial valve durability rate was 75.0% +/- 8.8% at 10 years. Whether this will continue to hold up over the next follow-up period is unclear. Certainly other tissue prostheses have shown significant degeneration rates beginning after the sixth year that have risen progressively thereafter. In any case, given the relatively low probability of thromboembolic phenomenon without anticoagulation, the trade-off of a prosthesis that may not be as durable as the mechanical ones is certainly acceptable.
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1002
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Wu WT, Chen YC, Reiter RJ. Day-night differences in the response of the pineal gland to swimming stress. PROCEEDINGS OF THE SOCIETY FOR EXPERIMENTAL BIOLOGY AND MEDICINE. SOCIETY FOR EXPERIMENTAL BIOLOGY AND MEDICINE (NEW YORK, N.Y.) 1988; 187:315-9. [PMID: 3347608 DOI: 10.3181/00379727-187-42670] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The effect of swimming stress on pineal N-acetyltransferase activity, hydroxyindole-O-methyltransferase (HIOMT) activity, and melatonin content was studied during the day and night in adult male rats. At night, elevated pineal activity was suppressed by light exposure before the animals swam. During the day, swimming for 2 hr did not stimulate NAT activity unless the animals were pretreated with desmethylimipramine (DMI), a norepinephrine uptake blocker. Pineal melatonin content after daytime swimming exhibited a weak rise, unless DMI was injected, in which case melatonin levels showed a highly significant increase. Swimming at night caused a greater (compared to daytime levels) increase in NAT activity in both noninjected and DMI-injected rats. Melatonin levels at night were highly significantly stimulated (compared to daytime values) even without pretreatment of the rats with DMI. The greater response of the rat pineal to swimming stress at night may relate either to an increase in the number of beta-adrenergic receptors in the pinealocyte membrane at night or to a reduced capacity of the sympathetic neurons in the pineal to take up excess circulating catecholamines. Pineal HIOMT activity was not influenced by swimming (with or without DMI) either during the day or at night.
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1003
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Guo XM, Mao WS, Ma QY, Zeng LH, Chen YC. [Systemic diseases in senile cataract patients]. YAN KE XUE BAO = EYE SCIENCE 1988; 4:28-31. [PMID: 3240797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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1004
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Lee C, Hu SE, Lok MS, Chen YC, Tseng CC. Microcomputer-based image analysis systems for two-dimensional electrophoresis gels. Biotechniques 1988; 6:216-24. [PMID: 3078515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
The intent of this overview is to provide the readers, especially those who are currently conducting two-dimentional electrophoresis, a basic understanding in the construction and use of microcomputer-based systems for the analysis of protein profiles generated by two-dimensional gel electrophoresis. In addition, a microcomputer-based system, employing fixed-point operations and effective algorithms, has been evaluated. The validity of this system has been demonstrated by using the two-dimensional silver-stained gels and fluorograms derived from the rat prostate. It is concluded that the present system can be used to aid the analysis of two-dimensional electrophoresis gels. An overall consideration of hardware and software components of a computer-based system is briefly discussed.
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1005
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Chen YC, Lynn KG, Nielsen B. Monitoring the surface oxidation process with an energy-tunable monoenergetic positron beam. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 37:3105-3108. [PMID: 9944893 DOI: 10.1103/physrevb.37.3105] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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1006
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Rabinovitch PS, Kubbies M, Chen YC, Schindler D, Hoehn H. BrdU-Hoechst flow cytometry: a unique tool for quantitative cell cycle analysis. Exp Cell Res 1988; 174:309-18. [PMID: 2448151 DOI: 10.1016/0014-4827(88)90302-3] [Citation(s) in RCA: 118] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Unlike other techniques, flow cytometric analysis of BrdU-quenched 33258 Hoechst fluorescence may be used to measure cell activation and the G1, S, and G2/M compartment distributions in each of three successive cell cycles after growth stimulation of human peripheral blood lymphocytes. Cell cycle kinetic curves can be constructed from the BrdU-Hoechst flow data which allow the simultaneous assessment of growth fraction, lag-time, compartment exit rate, compartment duration, and compartment arrest. Applications of this new versatile technique include the evaluation of drug and growth factor effects, cell aging, and diagnosis in medicine and immunology.
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1007
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Chen YC, Peoples OP, Walsh CT. Acinetobacter cyclohexanone monooxygenase: gene cloning and sequence determination. J Bacteriol 1988; 170:781-9. [PMID: 3338974 PMCID: PMC210722 DOI: 10.1128/jb.170.2.781-789.1988] [Citation(s) in RCA: 114] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
The gene coding for cyclohexanone monooxygenase from Acinetobacter sp. strain NCIB 9871 was isolated by immunological screening methods. We located and determined the nucleotide sequence of the gene. The structural gene is 1,626 nucleotides long and codes for a polypeptide of 542 amino acids; 389 nucleotides 5' and 108 nucleotides 3' of the coding region are also reported. The complete amino acid sequence of the enzyme was derived by translation of the nucleotide sequence. From a comparison of the amino acid sequence with consensus sequences of nucleotide-binding folds, we identified a potential flavin-binding site at the NH2 terminus of the enzyme (residues 6 to 18) and a potential nicotinamide-binding site extending from residue 176 to residue 208 of the protein. An overproduction system for the gene to facilitate genetic manipulations was also constructed by using the tac promoter vector pKK223-3 in Escherichia coli.
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1008
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Lee LN, Chen YC, Luh KT, Wang CH, Lin DT, Lui LT, Tien HF, How SW, Shen MC, Wu MC. Pulmonary infection after bone marrow transplantation. TAIWAN YI XUE HUI ZA ZHI. JOURNAL OF THE FORMOSAN MEDICAL ASSOCIATION 1988; 87:150-6. [PMID: 3294339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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1009
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Chi CS, Kao KP, Hsu NY, Lin E, Chen YC, Fu MC. [Kearns-Sayre syndrome with proteinuria, glucosuria, copperuria and prolapse of the mitral valve: report of a case]. TAIWAN YI XUE HUI ZA ZHI. JOURNAL OF THE FORMOSAN MEDICAL ASSOCIATION 1988; 87:95-100. [PMID: 3361298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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1010
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Ma CJ, Chen YC, Chen SF, Huo PD, Luo AX, Zhou YL, Lin YL. Effects of diagnostic ultrasound on sister chromatid exchange frequencies of the amniotic fluid cells of the pregnant women. JINRUI IDENGAKU ZASSHI. THE JAPANESE JOURNAL OF HUMAN GENETICS 1987; 32:329-33. [PMID: 3331397 DOI: 10.1007/bf01910289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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1011
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Chen YC, Kuo TL, Liu MC, Lien IN, Ang A, Lee TK. Studies of platelet hyperactivity in patients with ischemic cerebrovascular diseases: IV. Determination of the optimal dosage of aspirin by measuring plasma salicylate level. TAIWAN YI XUE HUI ZA ZHI. JOURNAL OF THE FORMOSAN MEDICAL ASSOCIATION 1987; 86:923-31. [PMID: 3694163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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1012
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Lee TK, Chen YC, Kuo TL. Comparison of the effect of acetylsalicylic acid on platelet function in male and female patients with ischemic stroke. Thromb Res 1987; 47:295-304. [PMID: 3629557 DOI: 10.1016/0049-3848(87)90143-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The aim of this study was to observe whether acetylsalicylic acid (ASA) had different effects in both sexes. Out of the ischemic stroke patients who were admitted to the National Taiwan University Hospital (NTUH), those who had not taken ASA or ASA-like drugs for more than 2 weeks were selected for this study. For the diagnosis of ischemic stroke, computed tomography (CT) of the brain was performed in all cases, and for differential diagnosis, other necessary procedures were employed in a few cases. The serum salicylate (SA) level was measured by Trinder's method, thromboxane B2 (TXB2) and 6-keto-PGF1 alpha by radioimmunoassay, threshold concentration of adenosine diphosphate (ADP) by Born's method, and circulating platelet aggregates (CPA) by Wu and Hoak's method. The present study showed that the means of serum SA levels after administration of the same dose of ASA were not significantly different between the two sexes. After ingestion of ASA, a single dose of 75 mg, 300 mg or 600 mg, or 300 mg 4 times a day, mean plasma TXB2 levels were significantly suppressed and mean threshold concentrations of ADP were significantly elevated in the two sexes. After administration of above-mentioned various doses of ASA, the abnormally high plasma TXB2 levels and abnormally low threshold concentrations of ADP and CPA ratios were significantly normalized in both male and female patients. Plasma 6-keto-PGF1 alpha levels were not influenced by ingestion of ASA 75 mg, but significantly depressed by administration of ASA 300 mg in both sexes. There were no sex differences in the antiplatelet effect of ASA in this experiment.
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1013
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Chen YC, Wang CH, Lin DT, Lui PT, Cheng AL, Liu TW, Tsay W, Tien HF, Liu MC, Chuu WM. [Allogeneic bone marrow transplantation in the treatment of leukemia--a preliminary report]. TAIWAN YI XUE HUI ZA ZHI. JOURNAL OF THE FORMOSAN MEDICAL ASSOCIATION 1987; 86:490-6. [PMID: 3305776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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1014
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Lee YS, Chen YC. Alterations of ultrastructures and anionic sites in basement membranes of myocardial cells and capillaries in patients with cyanotic congenital heart disease due to tetralogy of Fallot. JAPANESE HEART JOURNAL 1987; 28:333-47. [PMID: 3626020 DOI: 10.1536/ihj.28.333] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Electron microscopic cytochemical studies of the basement membranes of myocardial cells and capillaries were performed in 13 patients with tetralogy of Fallot who were divided into 2 groups. Group 1 included 7 patients in the early stage of the disease, ranging in age from 7 months to 5 years. Group 2 consisted of 6 patients in the far advanced stage of the disease, ranging in age from 30 to 46 years. The operatively excised infundibular muscles of the right ventricle were prepared for conventional electron microscopy and electron microscopic cytochemistry. The anionic sites in the basement membranes were characterized by cationic polyethyleneimine. The basement membrane ultrastructures of the myocardial cells and capillaries in the early stage of tetralogy of Fallot showed no apparent alterations with regular distribution of anionic sites, particularly in the external lamina of the basement membranes. In contrast, irregular thickening, wide splitting and lamination of the basement membranes of myocardial cells and capillaries, always associated with derangement and focal loss of anionic sites in the membranes were consistently observed in the far advanced stage of tetralogy of Fallot. The aforementioned results suggest that altered surface membrane integrity of myocardial cells and capillaries resulting from pathologic changes of the basement membranes are an important pathogenetic mechanism responsible for progressive degeneration of infundibular muscle cells and myocardial dysfunction in the course of tetralogy of Fallot.
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1015
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Lin CC, Chen YC, Su JY, Huang CH, Lai JH, Huang WC. [Clinical observation and treatment of fat embolism syndrome]. ZHONGHUA YI XUE ZA ZHI = CHINESE MEDICAL JOURNAL; FREE CHINA ED 1987; 39:215-8. [PMID: 3455327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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1016
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Lee WJ, Liaw KY, Chen KM, Liu MC, Chen YC, Wang CH, Shen MC, Liu CH, Lin KS. Therapeutic splenectomy for hematological diseases. TAIWAN YI XUE HUI ZA ZHI. JOURNAL OF THE FORMOSAN MEDICAL ASSOCIATION 1987; 86:152-7. [PMID: 3471858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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1017
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Chen YC, Maraganore JM, Reardon I, Heinrikson RL. Characterization of the structure and function of three phospholipases A2 from the venom of Agkistrodon halys pallas. Toxicon 1987; 25:401-9. [PMID: 3617077 DOI: 10.1016/0041-0101(87)90073-0] [Citation(s) in RCA: 34] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Three monomeric phospholipases A2 with isoelectric points 4.5, 6.9 and 9.3 were purified from the venom of Agkistrodon halys pallas. The complete amino acid sequence of the acidic enzyme and partial amino acid sequences of the neutral and basic phospholipases were determined in order to relate differences in enzymatic reactivities, pharmacologic activities and cytotoxicities to aspects of structure. Studies reported here and elsewhere demonstrate that the three phospholipases A2 exhibit pronounced differences relative to function. The acidic enzyme maintains the highest reactivity toward hydrolysis of monolayers at the air-water interface and may share a feature in common with the acidic enzyme from A. h. blomhoffii, namely the inhibition of platelet aggregation. The neutral phospholipase A2 designated agkistrotoxin, is characterized by potent activity as a pre-synaptic neurotoxin. Agkistrotoxin is the first single polypeptide chain, neurotoxic phospholipase A2 to be documented with a Group II disulfide pattern and, in several respects, may be considered functionally and structurally analogous to notexin from the Australian tiger snake venom. Finally, the basic membranes in the presence of a bactericidal-permeability-increasing protein from neutrophil sources.
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1018
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Nielsen B, Lynn KG, Chen YC. Study of solids by use of nonthermalized positrons. PHYSICAL REVIEW LETTERS 1986; 57:1789-1792. [PMID: 10033545 DOI: 10.1103/physrevlett.57.1789] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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1019
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Cheng AL, Chen YC, Wang CH, Shen MC, Hsieh RP, Tien HF, Liu MC, Lai HS, Liu CH. Adult acute lymphoblastic leukemia--lineage specific classification of 30 cases. TAIWAN YI XUE HUI ZA ZHI. JOURNAL OF THE FORMOSAN MEDICAL ASSOCIATION 1986; 85:973-83. [PMID: 2950202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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1020
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Tien HF, Wang CH, Yang YC, Su IJ, Chen YC, Shen MC, Liu CH. Mixed megakaryoblastic and myeloblastic leukemia in patients with acute phase of chronic myelogenous leukemia. TAIWAN YI XUE HUI ZA ZHI. JOURNAL OF THE FORMOSAN MEDICAL ASSOCIATION 1986; 85:963-72. [PMID: 2950201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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1021
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Uen WC, Liu MC, Wang CH, Tien HF, Chen YC, Shen MC, Liu CH. Myelodysplastic syndrome--clinical analysis of 16 cases. TAIWAN YI XUE HUI ZA ZHI. JOURNAL OF THE FORMOSAN MEDICAL ASSOCIATION 1986; 85:596-607. [PMID: 3463664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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1022
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Louie K, Chen YC, Dowhan W. Substrate-induced membrane association of phosphatidylserine synthase from Escherichia coli. J Bacteriol 1986; 165:805-12. [PMID: 3005238 PMCID: PMC214499 DOI: 10.1128/jb.165.3.805-812.1986] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
To better establish the intracellular location of the phosphatidylserine synthase of Escherichia coli and hence better understand how it is regulated in the cell, we compared the size, function, and binding properties of the enzyme made in vitro with the enzyme found in cell lysates and with the purified enzyme. The enzyme made either in vivo or in an active form in vitro was found primarily associated with the ribosomal fraction of the cell and had the same apparent molecular mass as the purified enzyme. These results were unaffected by the presence of protease inhibitors. Addition of unsupplemented E. coli membranes or membranes supplemented with phosphatidylethanolamine did not affect the subcellular distribution of the enzyme in these experiments. However, addition of membranes supplemented with either the lipid substrate, CDP-diacylglycerol, or the lipid product, phosphatidylserine, resulted in membrane association by the enzyme rather than ribosomal association. Addition of membranes supplemented with acidic lipids also brought about membrane association, but this association was primarily ionic since it was disrupted by high salt concentrations. These results strongly suggest that the ribosomal location of this enzyme is not the result of some modification event occurring after cell lysis and that the normal functioning of the enzyme involves membrane association which is primarily induced by the presence of a membrane-associated substrate.
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1023
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Chen YC, Wang CH, Huang SC, Lee EF, Lin DT, Shen MC, Liu MC, Tien HF, Lin KS. Autologous bone marrow transplantation after supralethal dose of total body irradiation in a case of mycosis fungoides. TAIWAN YI XUE HUI ZA ZHI. JOURNAL OF THE FORMOSAN MEDICAL ASSOCIATION 1986; 85:304-14. [PMID: 3528386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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1024
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Wu TJ, Tseng CD, Tseng YZ, Chen YC, Su CT, Han ML, Wu TL. [A case of beta-thalassemia major with mediastinal hematopoietic tumor and pulmonary hypertension]. TAIWAN YI XUE HUI ZA ZHI. JOURNAL OF THE FORMOSAN MEDICAL ASSOCIATION 1986; 85:315-20. [PMID: 3462315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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1025
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Chao YC, Chen YC, Shian LR, Fuh MM. [Studies in diabetic retinopathy--an investigation of 203 diabetics]. TAIWAN YI XUE HUI ZA ZHI. JOURNAL OF THE FORMOSAN MEDICAL ASSOCIATION 1986; 85:143-8. [PMID: 3525739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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