12451
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Yao EH, Wang Y. Acute upper gastrointestinal bleeding in the aged. A retrospective analysis of 100 cases. Med J Aust 1983; 1:311-2. [PMID: 6601227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
One hundred consecutive patients (predominantly men, aged 60 years and older), who were admitted to the Hsinhua Hospital, Shanghai, with acute bleeding from the gastrointestinal tract during a three-year period, were reviewed. The most common causes of bleeding were peptic ulcers, chronic gastritis, prolapse of gastric mucosa, and other benign conditions. In 22 patients, bleeding was either due to oesophageal varices, or was a complication of cor pulmonale. The incidence of malignant disease was 23% (higher than that reported from the United States or the United Kingdom). The mortality rate in patients with benign causes of gastrointestinal bleeding (after exclusion of patients with malignant disease, cor pulmonale, and hepatic cirrhosis) was 4.4%--much lower than the British rate, but slightly higher than that reported in an Australian study. It is hoped that, with the increasing interest in geriatrics, and closer attention to acute bleeding from the gastrointestinal tract in the aged, the mortality rate from this condition will decline.
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12452
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Hu WS, Pang XB, Wang Y, Hu CJ, Lü FH. Mode of action of tetrandrine on vascular smooth muscle. J TRADIT CHIN MED 1983; 3:7-12. [PMID: 6553137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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12453
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Wang Y, Bonder EM, Mooseker MS, Taylor DL. Effects of villin on the polymerization and subunit exchange of actin. CELL MOTILITY 1983; 3:151-65. [PMID: 6883468 DOI: 10.1002/cm.970030205] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
We have investigated the Ca2+ -dependent interactions of villin, a protein of the intestinal microvillar core, with actin by monitoring resonance energy transfer between fluorescently labeled actin subunits. In the presence of elevated free Ca2+ (approximately 20 microM), villin affects both the nucleation and the elongation phases of actin polymerization. Consistent with previous reports, villin stimulates the nucleation process and will form stable nuclei under depolymerization conditions. Compared to the control, the net rate of polymerization is slightly inhibited at low concentrations of villin (villin/actin approximately 1:400) but is stimulated at higher concentrations (villin/actin greater than 1:100). Villin also significantly increases the critical concentration of actin polymerization. Addition of either villin or villin-actin complexes induces depolymerization of preassembled actin filaments. This villin-induced depolymerization is reversible upon removal of free Ca2+ or upon the addition of phalloidin. The exchange of actin subunits at steady state is inhibited at low concentrations of villin (villin/actin approximately 1:200) but is stimulated at higher concentrations (villin/actin approximately 1:50). None of the above effects is observed at less than 10(-8) M free [Ca2+].
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12454
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Joncourt F, Wang Y, Kristensen F, de Weck A. Aging and Immunity: Decrease in Interleukin-2 Production and Interleukin-2-Dependent RNA-Synthesis in Lectin-Stimulated Murine Spleen Cells. Immunobiology 1982. [DOI: 10.1016/s0171-2985(82)80065-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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12455
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Wang Y. [Cytotoxic activity of human macrophage against human malignant cell lines]. ZHONGHUA YI XUE ZA ZHI 1982; 62:712-4. [PMID: 6820317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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12456
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Joncourt F, Wang Y, Kristensen F, de Weck AL. Aging and immunity: decrease in interleukin-2 production and interleukin-2-dependent RNA-synthesis in lectin-stimulated and murine spleen cells. Immunobiology 1982; 163:521-6. [PMID: 6186595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The RNA-content of G1 cells in lectin-stimulated spleen cell cultures of young and aged NMRI mice was determined by flow cytometry. In spleen cells of aged mice a preferential decrease of G1 cells with a high RNA-content, so-called G1b cells, was found. Since, as shown in a previous report, only cells with a high RNA-content are able to proliferate and the passage of low (G1a) to high (G1b) RNA-content is interleukin-2(IL-2)-dependent, the ability of young and old spleen cells to produce IL-2 was tested. In old spleen cells a diminished production of IL-2 was found. Addition of external IL-2, however, did not increase the proliferative capacity of old spleen cells, nor did it induce more G1b cells. Thus spleens of aged mice contain cells, which can be activated by lectin, but then fail to respond to IL-2. Both decrease in IL-2 production and receptivity for IL-2 may contribute to the diminishing immune response in aging individuals.
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12457
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Wang Y, Schäfer-Ridder M, Stratowa C, Wong TK, Hofschneider PH. Expression of hepatitis B surface antigen in unselected cell culture transfected with recircularized HBV DNA. EMBO J 1982; 1:1213-6. [PMID: 6327256 PMCID: PMC553191 DOI: 10.1002/j.1460-2075.1982.tb00015.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Hepatitis B virus (HBV) DNA was isolated from the recombinant plasmid pA01 -HBV and recircularized . Immediately after introduction of this DNA into mouse fibroblasts (NIH 3T3) we observed increasing release of hepatitis B surface antigen (HBsAg) into the culture medium. Later production of HBsAg declined to a lower but constant level. No dominant selective marker and foreign promoter were necessary in this system, which therefore can be used for the study of regulation of HBsAg expression.
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12458
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Wang Y. [Clinical report of 92 cases of acute poisoning by decomposed organofluotic plastics]. ZHONGHUA YI XUE ZA ZHI 1982; 62:358-61. [PMID: 6812926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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12459
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Abstract
Sixteen consecutive patients (12 with tricuspid atresia) underwent a Fontan procedure, with no operative deaths. There were three late deaths. Eleven of the survivors were electively catheterized 4-25 months postoperatively. Rest and exercise hemodynamics were measured in five patients, and resting hemodynamics alone were measured in three. All exercised patients were New York Heart Association class I Cardiac index was low at rest (2.3 +/- 0.61/min/m2) and during exercise (4.9 +/- 1.11/min/m2) due to a low stroke index both at rest (28 ml) and exercise (35 ml). Accordingly, mixed venous oxygen saturations were decreased (66% at rest and 31% during exercise). These values are significantly lower than those at rest and during exercise from 23 control patients of similar age and size. Heart rates, pulmonary vascular resistances, and left ventricular filling pressures appeared normal both at rest and during exercise. High right atrial pressure at rest (15 mm Hg) was associated with minimal conduit gradient (2 mm Hg). However, exercise increased the mean conduit gradient to 8 mm Hg, demonstrating significant functional conduit obstruction. As expected, the cardiovascular response to exercise is abnormal after the Fontan procedure, even in asymptomatic patients. This abnormal response may be exacerbated by conduit obstruction, and conduit obstruction may not be apparent during resting studies.
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12460
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Schaefer-Ridder M, Wang Y, Hofschneider PH. Liposomes as gene carriers: efficient transformation of mouse L cells by thymidine kinase gene. Science 1982; 215:166-8. [PMID: 7053567 DOI: 10.1126/science.7053567] [Citation(s) in RCA: 136] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Stable transformation of mouse L cells deficient in thymidine kinase was achieved by liposome-mediated transfer of a recombinant plasmid carrying the thymidine kinase gene. Ten percent of the recipient cells expressed thymidine kinase activity. The transformed phenotype (for example, 200 out of 10(6) cells) was stable under selective and nonselective conditions. The liposome technique is compared with other methods currently used for gene transfer.
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12461
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Neumann E, Schaefer-Ridder M, Wang Y, Hofschneider PH. Gene transfer into mouse lyoma cells by electroporation in high electric fields. EMBO J 1982; 1:841-5. [PMID: 6329708 PMCID: PMC553119 DOI: 10.1002/j.1460-2075.1982.tb01257.x] [Citation(s) in RCA: 1393] [Impact Index Per Article: 33.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Electric impulses (8 kV/cm, 5 microseconds) were found to increase greatly the uptake of DNA into cells. When linear or circular plasmid DNA containing the herpes simplex thymidine kinase (TK) gene is added to a suspension of mouse L cells deficient in the TK gene and the cells are then exposed to electric fields, stable transformants are formed that survive in the HAT selection medium. At 20 degrees C after the application of three successive electric impulses followed by 10 min to allow DNA entry there result 95 (+/- 3) transformants per 10(6) cells and per 1.2 micrograms DNA. Compared with biochemical techniques, the electric field method of gene transfer is very simple, easily applicable, and very efficient. Because the mechanism of DNA transport through cell membranes is not known, a simple physical model for the enhanced DNA penetration into cells in high electric fields is proposed. According to this ' electroporation model' the interaction of the external electric field with the lipid dipoles of a pore configuration induces and stabilizes the permeation sites and thus enhances cross membrane transport.
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12462
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Stratowa C, Doehmer J, Wang Y, Hofschneider PH. Recombinant retroviral DNA yielding high expression of hepatitis B surface antigen. EMBO J 1982; 1:1573-8. [PMID: 6327280 PMCID: PMC553253 DOI: 10.1002/j.1460-2075.1982.tb01357.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
A genomic fragment of hepatitis B virus encoding the surface antigen (HBsAg) was inserted into the proviral genome of Moloney mouse sarcoma virus (MSV), obtained from the mouse cell line G8 -124. The recombinant DNA was introduced into NIH 3T3 mouse fibroblasts. Cells, morphologically transformed by the oncogene of MSV (v-mosM) were selected, established as cell lines and tested for expression of HBsAg. An expression level of up to 4.5 micrograms/10(7) cells/day was detected.
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12463
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Gobel FL, Nordstrom LA, Nelson RR, Wang Y. The pathophysiology of angina pectoris and the effect of lidoflazine. Circulation 1982; 65:I27-32. [PMID: 7030519] [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: 01/23/2023]
Abstract
Angina pectoris results from a deficiency in myocardial oxygen supply. The rate-pressure product is an important predictor of myocardial oxygen requirements in patients with ischemic heart disease and in normal persons. The rate-pressure product at the onset of angina pectoris is reproducible under a variety of circumstances with a suitable protocol. In some patients, coronary artery spasm may reduce myocardial blood flow and contribute to the development of angina pectoris. Lidoflazine is a synthetic drug that appears to be a calcium-entry blocker and results in symptomatic improvement in patients with angina pectoris. Lidoflazine reduces the exercising rate-pressure product by its effect on heart rate and by decreasing systemic vascular resistance. It decreases coronary vascular resistance and antagonizes processes leading to an increase in coronary vasomotor tone.
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12464
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Kemeny N, Yagoda A, Wang Y, Field K, Wrobleski H, Whitmore W. Randomized trial of standard therapy with or without poly I:C in patients with superficial bladder cancer. Cancer 1981; 48:2154-7. [PMID: 7028242 DOI: 10.1002/1097-0142(19811115)48:10<2154::aid-cncr2820481006>3.0.co;2-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Thirty-two patients with superficial urinary bladder tumors were stratified for four variables and randomized after complete transurethral resection and/or fulguration of tumor to receive standard therapy with or without intravenous Poly I:C. Cystoscopies were performed at three- to four-month intervals for up to 48 months. While there was no statistically significant difference in the tumor recurrence rates in the two groups during the first year, a significant increase (P = 0.003) in survival at four years was observed between the Poly I:C group and the control group. The difficulties in evaluating the efficacy of anti-neoplastic agents in the treatment of superficial bladder tumors are discussed.
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12465
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Nicoloff DM, Emery RW, Arom KV, Northrup WF, Jorgensen CR, Wang Y, Lindsay WG. Clinical and hemodynamic results with the St. Jude Medical cardiac valve prosthesis. A three-year experience. J Thorac Cardiovasc Surg 1981; 82:674-83. [PMID: 7300400] [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: 01/24/2023]
Abstract
Two hundred thirty-two consecutive patients (October 3, 1977, through December, 31, 1980) underwent aortic (AVR), mitral (MVR), or double (DVR) valve replacement with the St. Jude Medical (SJM) prosthesis. Operative mortality for the entire group was 7.3%. There was 100% follow-up. Warfarin (Coumadin) anticoagulation was recommended for all patients. There were no cases of mechanical failure. The incidence of thromboembolism was 0.6/1,000 patient-months for those with AVR, 3/1,000 patient-months for those with MVR, and 0% for those with DVR. Thrombosis of a prosthesis occurred in two patients with DVR. Clinically significant hemolysis occurred in three patients with paravalvar leaks following MVR. Late postoperative prosthetic infection has not occurred. Postoperative catheterization studies in 33 patients revealed no transvalvular gradient at rest in 21 patients. The remainder of the patients catheterizd had low transvalvular gradients. There was a minimal increase in transvalvular gradient with exercise. The SJM cardiac valve is a viable alternative in the surgical therapy of valvular heart disease.
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12466
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Cao HL, Wang FL, Du XL, Chen SX, Wang Y, Liu CB. [Preliminary studies on HBsAg excretion from saliva in healthy carriers and epidemiological pattern of hepatitis B (author's transl)]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1981; 3:179-82. [PMID: 6459179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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12467
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Peng S, Wang Y, Ho T. Molecular structure of a four-coordinated macrocyclic Ni-complex [Ni(C 26H 14N 8)]. Acta Crystallogr A 1981. [DOI: 10.1107/s0108767381092593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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12468
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Petrow V, Wang Y, Lack L, Sandberg A. Prostatic cancer. I. 6-Methylene-4-pregnen-3-ones as irreversible inhibitors of rat prostatic delta 4-3 ketosteroid 5 alpha-reductase. Steroids 1981; 38:121-40. [PMID: 7303026 DOI: 10.1016/0039-128x(81)90027-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Some derivatives of 6-methylene-4-pregnen-3-one were studied as inhibitors of delta 4-3-ketosteroid 5 alpha-reductase. Maximum inhibitory activity was shown by 17-acetoxy-6-methylene-4-pregnene-3,20-dione (AMPD). Irreversible inactivation was observed following preincubation of the enzyme with NADPH and AMPD. This inactivation was found to occur only in the presence of NADPH. As such enzyme inactivation was not due to the formation of a more inhibitory metabolic product, or to the formation of superoxide via a cytochrome P-450/NADPH pathway, it seemed likely that the observed inactivation was derived from an irreversible combination of the enzyme with AMPD. That this was probably the case was established by kinetic studies which revealed a pattern compatible with a kcat type of mechanism.
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12469
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Gabe EJ, Wang Y, Le Page Y. 6,6'-Dibromo-2,2',4,4'-tetra-tert-butylazobenzene. ACTA CRYSTALLOGRAPHICA SECTION B: STRUCTURAL SCIENCE 1981. [DOI: 10.1107/s0567740881004846] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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12470
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12471
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Chen ZW, Wang Y. ["Hand reconstruction" by autotransplantation of toes (author's transl)]. ZHONGHUA WAI KE ZA ZHI [CHINESE JOURNAL OF SURGERY] 1981; 19:7-9. [PMID: 7307845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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12472
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Le Page Y, Gabe EJ, Wang Y, Barclay LRC, Holm HL. 2,2',4,4',6,6'-Hexa- tert-butylazobenzene. ACTA CRYSTALLOGRAPHICA SECTION B: STRUCTURAL SCIENCE 1980. [DOI: 10.1107/s0567740880010266] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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12473
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Shi ZY, Ning XH, Zhu SC, Zhao DM, Huang PG, Yang SY, Wang Y, Dong ZS. Electrocardiogram made on ascending the Mount Qomolangma from 50 m a. s. l. SCIENTIA SINICA 1980; 23:1316-25. [PMID: 7433968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
In May 1975, one female mountaineer and eight male mountaineers of our country once more climbed onto the highest peak of the world Mount Qomolangma from the north slope. At the same time, we recorded 15 electrocardiograms while they were climbing from 7,600 m to the peak(8,848.13m) through radio-operated electrocardiography. In this report we mainly analyze the characteristics of electrocardiogram of six mountaineers who ascended the peak at the stage from 50 m a. s. l. to over 8,200m a. s. l. The result proves that although obvious changes after reaching an altitude above 8,200 m from the plain region should be those of indexes of heart rates, the QRS axis, Q-TR, Q-T/T-Q, P wave and T wave, there is no T wave diphasic, inverted, flat or abnormal shifting of S-T segment in the electrocardiogram of these outstanding mountaineers. This fully proves that those summit climbers are of excellent constitution and good adaptation ability to hypoxia. This also shows that the people who have been trained and acclimatized under hypoxia conditions (including permanent altitude residents and native lowlanders) can maintain normal physiological functions under ultra-anoxia for quite a long time.
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12474
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Wang Y, Calvert LD, Brownstein SK. The structure of tetramethylammonium hexafluorophosphate. ACTA ACUST UNITED AC 1980. [DOI: 10.1107/s0567740880006498] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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12475
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Abstract
To evaluate the efficacy of lithium carbonate in ameliorating leukopenia, 37 patients (3 to 26 years old, mea (less than or equal to 1,000/mm3) over 40% of the time were designated at random on the last day of 82 separate chemotherapy courses to receive lithium or no treatment. Four could not take the drug because of the size of the capsules. There were 39 controls and 39 patients given lithium. Blood levels were maintained at 0.2 to 1.2 mEq/1 (median 0.7). The median drop of WBC in the treated group was 3,400/mm3 with a nadir of 1,800/mm3 vs 5,000 and 1,400, respectively, for the untreated patients (P LESS THAN 0.01). Eight patients (21%) in the lithium-treated group became severly leukopenic (less than or equal to 1,000/mm3) while 14 (36%) in the control group became leukopenic to that extent. Twenty-four patient days were spent with the WBC less than or equal to 1,000/mm3 after lithium and 57 days in the control group. Three patients required admission for 24 hospital days for fever while leukopenic after lithium, whereas seven patients spent 62 days in the hospital in the control group. Lithium reduces the period of leukopenia after chemotherapy during which time the patients may acquire infections.
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