951
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Raymenants E, Yang B, Nicolini F, Behrens P, Lawson D, Mehta JL. Verapamil and aspirin modulate platelet-mediated vasomotion in arterial segments with intact or disrupted endothelium. J Am Coll Cardiol 1993; 22:684-9. [PMID: 8354799 DOI: 10.1016/0735-1097(93)90177-3] [Citation(s) in RCA: 10] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
OBJECTIVES This study was designed to examine the effects of verapamil and aspirin, which decrease thromboxane A2 and serotonin release, on the modulation of vascular tone by platelets. BACKGROUND Aggregating platelets cause constriction of de-endothelialized arterial segments through thromboxane A2 and serotonin release. These cells cause relaxation of arterial segments with intact endothelium through release of the endothelium-derived relaxing factor. METHODS Healthy subjects were given either no drug, verapamil or aspirin for > or = 5 days before their platelets were obtained. The effects of platelets obtained from subjects before and after treatment with aspirin or verapamil on the tone of rat aortic rings were determined. RESULTS As expected, control platelets (before verapamil or aspirin treatment) induced concentration-dependent relaxation of rat aortic rings with intact endothelium and a concentration-dependent contraction of de-endothelialized rings. Verapamil treatment enhanced (p < 0.02) the platelet-mediated relaxation in rings with intact endothelium and abolished platelet-mediated constriction (p < 0.01) in the de-endothelialized rings. Aspirin treatment also abolished (p < 0.05) platelet-mediated constriction of the de-endothelialized rings. The de-endothelialized rings contracted normally in response to the synthetic thromboxane A2 analogue U46,619, as well as to serotonin, indicating that the vascular smooth muscle response to thromboxane A2 and serotonin was intact. CONCLUSIONS This study provides evidence for the modulation of platelet-mediated vasoconstriction of de-endothelialized arterial segments by prior treatment of subjects with verapamil or aspirin. In clinical syndromes characterized by endothelial dysfunction or disruption, treatment with verapamil or aspirin may modify platelet-vessel wall interactions.
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Affiliation(s)
- E Raymenants
- Division of Cardiology, University of Florida College of Medicine, Gainesville 32610-0277
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952
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Yang B, Francescangeli O, Rustichelli F. New conformational aspects of the odd-even effect in the structure of thermotropic liquid crystalline polyesters by X-ray diffraction analysis. Acta Crystallogr A 1993. [DOI: 10.1107/s0108767378090388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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953
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Walker B, Mevel E, Yang B, Breger P, Chambaret JP, Antonetti A, DiMauro LF, Agostini P. Double ionization in the perturbative and tunneling regimes. Phys Rev A 1993; 48:R894-R897. [PMID: 9909791 DOI: 10.1103/physreva.48.r894] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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954
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Yang B, Zhang L, Turley EA. Identification of two hyaluronan-binding domains in the hyaluronan receptor RHAMM. J Biol Chem 1993; 268:8617-23. [PMID: 7682552] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
We have identified two discrete hyaluronan- (HA) binding domains in the HA receptor RHAMM (Receptor for HA-Mediated Motility) that mediates the locomotion of H-ras transformed fibroblasts. A complete RHAMM cDNA (1.43 kilobases (kb)) was expressed as a fusion protein with pGEX-2T in Escherichia coli HB101 and was shown to bind specifically to both biotin-labeled HA in a transblot assay and to HA-Sepharose. The complete cDNA was truncated with restriction endonucleases from the 3' end resulting in 1.30-, 1.02-, 0.71-, and 0.41-kb cDNAs which were then expressed in HB101. Only the fusion peptide expressed from the complete cDNA and the 1.30-kb cDNA bound to HA indicating that the region located between 1.02-1.30 kb of RHAMM cDNA was critical for recognition of this glycosaminoglycan. Deletion of 114 bases in this region virtually eliminated HA binding activity thus defining the major glycosaminoglycan binding region to amino acids 400-434 located near the carboxyl terminus of RHAMM. Two domains containing clusters of basic amino acids were identified within this region. Synthetic peptides mimicking these two domains both inhibited HA binding to the complete 1.43-kb expressed glutathione s-transferase-RHAMM fusion protein, and also directly bound to HA-Sepharose. Random peptides and peptides mimicking other regions in RHAMM did not inhibit HA-RHAMM interactions and bound weakly to HA-Sepharose. Oligonucleotides encoding either of these two peptides were linked to the NH2-terminal 0.71 kb of RHAMM which encoded a peptide that did not contain HA binding activity. Fusion proteins containing either of these recombinant peptides acquired HA binding activity as assessed with a transblot assay. Thus, we have identified two domains within RHAMM that are responsible for its HA binding activity.
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Affiliation(s)
- B Yang
- Manitoba Institute of Cell Biology, University of Manitoba, Winnipeg, Canada
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955
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Yang B, Hoe MH, Black P, Hunt RC. Role of oligosaccharides in the processing and function of human transferrin receptors. Effect of the loss of the three N-glycosyl oligosaccharides individually or together. J Biol Chem 1993; 268:7435-41. [PMID: 8463276] [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: 01/30/2023] Open
Abstract
When the coding sequence for human transferrin receptors was expressed in a Chinese hamster ovary cell line lacking endogenous transferrin receptors, 86-kDa molecules containing three N-glycosidically linked oligosaccharides were synthesized. These rapidly dimerized to form 172-kDa molecules which increased in size to 190 kDa. After site-directed mutagenesis of all three N-glycosylation sites, 80-kDa receptors were synthesized and only a few dimers were formed. 84-kDa monomers were synthesized in the absence of the oligosaccharide attached to Asn727 or Asn317. Dimerization and maturation through the Golgi body of the Asn727 mutant receptors were much slower than the wild type whereas the Asn317 mutant receptors behaved more similarly to the wild type. Lack of the oligosaccharide at Asn251 gave rise to 73-kDa monomers because of proteolytic processing (Hoe, M. H., and Hunt, R. C. (1992) J. Biol. Chem. 267, 4916-4923), but a second mutation at a potential cleavage site allowed the formation of 84-kDa receptors. These also dimerized at a similar rate to wild type receptors. The three-site mutant receptors were degraded in the endoplasmic reticulum but all three 84-kDa single site mutant receptor species migrated to the cell surface. However, receptors lacking the oligosaccharide at Asn727 bound and internalized little transferrin as a result of reduced affinity.
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Affiliation(s)
- B Yang
- Department of Microbiology and Immunology, University of South Carolina School of Medicine, Columbia 29208
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956
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957
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958
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Abstract
A method for detecting hyaluronan (HA)-binding proteins in transblot assays using biotinylated HA (BHA) is described. Some of the binding characteristics of a novel HA receptor termed RHAMM (Receptor for HA-Mediated Motility) are characterized using this assay. The method is also used to detect other HA-binding proteins in tissue homogenates. This method is semiquantitative, rapid, reproducible, sensitive and therefore of potential use in identifying the levels of HA-binding proteins in different cells and tissues.
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Affiliation(s)
- K Hoare
- Department of Pediatrics and Child Health, Manitoba Institute of Cell Biology, Winnipeg, Canada
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959
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Abstract
Nucleic acid amplification by polymerase chain reaction (PCR) is a very powerful technique in terms of sensitivity but is limited in terms of ability to perform accurate quantitation. While there is a theoretical correlation between copies of input target sequence and those of PCR product, the quantitative nature of this relationship is obscured by unpredictable variations in reaction conditions and by inhibitory and/or stimulatory substances which might be present in sample preparations, especially those derived from biological fluids. To reliably estimate copies of input DNA target from PCR product, we designed a combination of internal and external control systems coupled to DNA/RNA hybridization and enzymatic immunodetection techniques. The internal control system served to monitor amplification efficiency and to correct for the effects of inhibitors or stimuli on the efficiency of the DNA amplification. The assay is quantitative, nonisotopic, and can be widely applied to assessment of the quantity of DNA present in a wide range of preparations.
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Affiliation(s)
- B Yang
- Eudowood Division of Infectious Diseases, Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205
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960
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Dolce JW, Yang B, Saeed M, DiMauro LF, Scoles G. Highly efficient synchronous amplification of a picosecond dye laser at a kHz repetition rate. ACTA ACUST UNITED AC 1993. [DOI: 10.1007/bf00332154] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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961
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Abstract
In multiple regression analyses, the monthly time-series suicide and homicide rates for the USA from 1957-1986 were associated with unemployment and marriage rates. In contrast, annual time-series suicide and homicide rates were not as strongly associated with the social variables.
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Affiliation(s)
- B Yang
- Department of Economics, Drexel University, Philadelphia, PA 19104
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962
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Abstract
Japanese quails were inoculated orally with 1 x 10(10) colony-forming units of Salmonella enteritidis phage type 4 isolated from chicks to obtain information concerning S. enteritidis infection and egg transmission. The inoculation resulted in a bacteraemic infection with seeding of the liver, spleen, intestine, peritoneum, ovule, ovary and oviduct. Some infected birds showed diarrhoea, ruffled feathers, depression, loss of appetite and death. However, most infected birds remained clinically normal with normal egg production. Salmonella enteritidis was isolated from the albumen of 7, yolk of 15, shell of 13, and shell membrane of 15 of 164 eggs. The experiment suggests that S. enteritidis phage type 4 is invasive for Japanese quails and the infected eggs laid by S. enteritidis infected quails are probably the result of transovarian infection.
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Affiliation(s)
- B Yang
- Department of Veterinary Medicine, Shanxi Agricultural University, Taigu, Shanxi 030801, People's Republic of China
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963
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964
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Saeed M, Yang B, Tang X, DiMauro LF. Energy partition among fragments and electrons in high field dissociation. Phys Rev Lett 1992; 68:3519-3522. [PMID: 10045725 DOI: 10.1103/physrevlett.68.3519] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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965
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Abstract
Brevard, Lester, and Yang in 1990, studying Menninger's motives for suicide, reported more evidence for the wish to be killed (i.e., self-blame or self-punishment) in suicide notes for completed suicides than in parasuicide notes for attempted suicide; however, they did not control for age and sex. A comparison of notes written by completed and attempted suicides that controlled for age and sex showed no differences in the presence of content which reflected Menninger's three motives for suicide, including the wish to be killed.
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966
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Affiliation(s)
- D Lester
- Center for the Study of Suicide, Blackwood, NJ 08012
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967
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968
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Abstract
Time-series analyses were carried out to explore the importance of sociological and economic variables in accounting for the suicide rate in the U.S.A. and in Taiwan for 1952-1984. Sociological variables (divorce and female labor force participation) played similar roles in the multiple regressions for both nations while economic variables (GNP per capita/growth and unemployment) played a role only in the U.S.A.
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Affiliation(s)
- B Yang
- Department of Economics, Drexel University, Philadelphia, PA 19104
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969
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Abstract
In a time series study of the USA from 1933 to 1984, fertility rates were associated with the suicide rates of those aged 15-44. The higher the fertility rate the lower the suicide rate for these age groups, for both whites and non-whites, and for both men and women. The results were seen as supporting Durkheim's theory of suicide.
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Affiliation(s)
- D Lester
- Centre for the Study of Suicide, Blackwood, New Jersey
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970
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Abstract
A time series study of socioeconomic correlates of suicide and homicide in Japan and the USA from 1953 to 1982 revealed cross-national differences. Divorce rates were positively associated with rates of personal violence in the USA but negatively associated with these rates in Japan. Unemployment and female labor force participation also correlated differently with rates of personal violence in the two nations suggesting that different theories may be necessary to account for the variation in rates of personal violence in different societies.
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Affiliation(s)
- D Lester
- Center for the Study of Suicide, Blackwood, New Jersey 08012
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971
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Lester D, Yang B. Social and economic correlates of the elderly suicide rate. Suicide Life Threat Behav 1992; 22:36-47. [PMID: 1579985] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A review of research found that the suicide rates of the elderly show similar regional social correlates as the suicide rates of younger groups and that these rates can be explained using similar sociological theories. Time-series studies in the USA indicate that the impact of economic prosperity on the suicide rate of the elderly is beneficial, whereas the impact on the suicide rate of younger adults is detrimental. The issues raised by this research are discussed.
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972
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Abstract
A time-series study from 1933 to 1986 in the USA showed that the nation's military participation rate was concurrently associated with lower homicide rates among nonwhite but not white individuals.
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973
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Abstract
Identical data sets for Australia and the USA from 1946 to 1984 were analysed to explore the association of unemployment rates, female participation in the labour force and divorce with suicide rates. While female participation in the labour force was related to suicide rates in Australia, unemployment was not. For the USA, both female participation in the labour force and unemployment were related to suicide rates.
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Affiliation(s)
- D Lester
- Center for the Study of Suicide, Blackwood, New Jersey 08012
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974
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Yang B, Sullivan DE, Gray CG. Comment on: Molecular orientation near liquid–vapor interface of methanol: Simulational study. J Chem Phys 1991. [DOI: 10.1063/1.461355] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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975
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Pretlow TG, Pretlow TP, Yang B, Kaetzel CS, Delmoro CM, Kamis SM, Bodner DR, Kursh E, Resnick MI, Bradley EL. Tissue concentrations of prostate-specific antigen in prostatic carcinoma and benign prostatic hyperplasia. Int J Cancer 1991; 49:645-9. [PMID: 1718912 DOI: 10.1002/ijc.2910490503] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Prostate-specific antigen (PSA), as measured in peripheral blood, is currently the most widely used marker for the assessment of tumor burden in the longitudinal study of patients with carcinoma of the prostate (PCA). Studies from other laboratories have led to the conclusion that a given volume of PCA causes a much higher level of PSA in the peripheral circulation of patients than a similar volume of prostate without carcinoma. We have evaluated PSA in the resected tissues immunohistochemically and in extracts of PCA and of prostates resected because of benign prostatic hyperplasia (BPH) with an enzyme-linked immunosorbent assay. Immunohistochemical results were less quantitative than but consistent with the results of the ELISA of tissue extracts. Immunohistochemically, there was considerable heterogeneity in the expression of PSA by both PCA and BPH both within and among prostatic tissues from different patients. While the levels of expression of PSA in these tissues overlap broadly, PSA is expressed at a lower level in PCA than in BPH when PSA is expressed as a function of wet weight of tissue (p = 0.0095), wet weight of tissue/% epithelium (p less than 0.0001), protein extracted from the tissue (p = 0.0039), or protein extracted/% epithelium (p less than 0.0001).
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Affiliation(s)
- T G Pretlow
- Institute of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH 44106
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976
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Walker B, Saeed M, Breeden T, Yang B, DiMauro LF. Anomalous intensity-dependent vibrational distributions of oxygen molecules in a nonresonant laser field: A molecular perspective. Phys Rev A 1991; 44:4493-4498. [PMID: 9906489 DOI: 10.1103/physreva.44.4493] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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977
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Carfagna C, Amendola E, Nicolais L, Acierno D, Francescangeli O, Yang B, Rustichelli F. Blends of a polyetherimide and a liquid crystalline polymer: Fiber orientation and mechanical properties. J Appl Polym Sci 1991. [DOI: 10.1002/app.1991.070430501] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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978
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Yang B. [Biological significance of DNA content in parotid carcinoma]. Zhonghua Zhong Liu Za Zhi 1991; 13:381-4. [PMID: 1664320] [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
The DNA content was analysed by flow cytometry in 5 samples of normal salivary tissue, 36 cases of benign salivary gland tumors and 50 cases of parotid carcinoma. It was found that the difference in the DNA index (DI) and proliferative index (PI) in age, sex, tumor size and TNM staging were insignificant (P greater than 0.05). The DI and PI of poorly differentiated parotid carcinoma were much higher than those of well differentiated parotid carcinoma (P less than 0.05). The DI and PI were closely related to the presence of lymph node metastasis (P less than 0.001). The DI and PI of patients with facial nerve paralysis and with disease free period shorter than 5 years were remarkably higher than those with normal facial nerve and disease free survival for more than 5 years (P less than 0.01). The above results indicate that DI and PI, showing cell proliferative kinetic characteristics, can provide reliable and objective parameters for assessing the degree of differentiation, degree of malignancy, biological behavior and prognosis of parotid carcinomas.
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Affiliation(s)
- B Yang
- Dept. Oro-maxillo-facial Surgery, Jiangxi Medical College, Nanchang
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979
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Coutlée F, Yang B, Bobo L, Mayur K, Yolken R, Viscidi R. Enzyme immunoassay for detection of hybrids between PCR-amplified HIV-1 DNA and a RNA probe: PCR-EIA. AIDS Res Hum Retroviruses 1991; 7:787. [PMID: 1742086 DOI: 10.1089/aid.1991.7.787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
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980
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Xiao SH, Wang MJ, You JQ, Jiao PY, Yang B, Chai JJ. [Pharmacokinetics of four benzimidazoles administered intragastrically to mice infected with secondary cysts of Echinococcus granulosus]. Zhongguo Yao Li Xue Bao 1991; 12:430-4. [PMID: 1819898] [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
Mice infected with secondary cysts of Echinococcus granulosus were treated ig with mebendazole (Meb), albendazole (Alb), albendazole sulfoxide (AlbSO) or albendazole sulphone (AlbSP) at equal effective dosage. The blood concentrations-time courses of the four drugs were adequately fitted to a liner one-compartment open model analysed with a modified NONLIN program, and the major pharmaco- kinetic parameters were then calculated (Table 1). When Alb was given ig to the infected mice, 76.2-84.5% of the drug absorbed was metabolized to AlbSO. There fore, the pharmacokinetics of AlbSO in Alb group was determined. After ig administration of Meb to the infected mice, the ratio of the drug contents in cyst wall to corresponding plasma concentrations of Meb was 10.6-26.9%, but much less in cyst fluid. In Alb and AlbSO groups, similar AlbSO contents in cyst wall and cyst fluid with higher ratio to plasma concentrations were observed (Fig 3). The results suggest that E granulosus cysts were more susceptible to Meb than to Alb or AlbSO, and improvement of Meb absorption would be favourable for enhancement of efficacy in the treatment of hydatid disease.
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Affiliation(s)
- S H Xiao
- Institute of Parasitic Diseases, Chinese Academy of Preventive Medicine, Shanghai
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981
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Zhao L, Yang B, Li S, Zhou Q. [Plasma PGI2 and TXA2 levels on a model of PDH in leptospirosis]. Hua Xi Yi Ke Da Xue Xue Bao 1991; 22:253-5. [PMID: 1748406] [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: 12/28/2022]
Abstract
Guinea pigs were intravenously injected with icterhemorrhagiae serogroup Lai serovar strain 017 leptospirosis to model the pulmonary diffuse hemorrhage (PDH) in leptospirosis. Thirty-eight hours after the injection, the jugular arteries were catheterized to collect blood sample. The plasma was prepared for radioimmunoassay of TXB2 and 6-keto-PGF1a, the stable metabolites of TXA2 and PGI2 respectively. The plasma level of TXB2 in the experimental group, 107.15 +/- 41.65 pg/ml (n = 7), almost doubled that of the control, 54.05 +/- 12.93 pg/ml (n = 7), with significant difference (P less than 0.01); meanwhile, no significant difference was observed of 6-keto-PGF1a, 67.97 +/- 16.89 pg/ml (n = 6) vs. 98.06 +/- 40.63 pg/ml (n = 9) with P greater than 0.1. The fact that TXA2 causes vasoconstriction and increases vessel permeability suggests that TXA2 elevation should play a role in the mechanism of PDH in leptospirosis.
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982
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Yang B, Saeed M, DiMauro LF, Zavriyev A, Bucksbaum PH. High-resolution multiphoton ionization and dissociation of H2 and D2 molecules in intense laser fields. Phys Rev A 1991; 44:R1458-R1461. [PMID: 9906206 DOI: 10.1103/physreva.44.r1458] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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983
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Rackley RR, Yang B, Pretlow TG, Abdul-Karim FW, Lewis TJ, McNamara N, Delmoro CM, Bradley EL, Kursh E, Resnick MI. Differences in the leucine aminopeptidase activity in extracts from human prostatic carcinoma and benign prostatic hyperplasia. Cancer 1991; 68:587-93. [PMID: 1712242 DOI: 10.1002/1097-0142(19910801)68:3<587::aid-cncr2820680324>3.0.co;2-w] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Extracts of tissue showed that prostatic carcinomas contain less leucine aminopeptidase activity than benign prostatic hyperplasia. This is true when activity is expressed as specific activity (P = 0.0033), specific activity/% epithelium (P = 0.0007), activity/wet weight of tissue (P = 0.0028), or activity/wet weight of tissue/% epithelium (P = 0.0005). Almost all histochemically demonstrable activity is located in the epithelium. Enzymatic activities in extracts and in histochemical preparations showed similar differences between carcinoma and benign prostatic hyperplasia and were related (R = -0.38, P = 0.0400) to Gleason's grades. The transurethrally resected prostate cancers studied contained no well-differentiated tumors and a high proportion of poorly differentiated tumors. Histochemical activity is absent in most prostatic carcinomas and decreased in others. This observation is particularly interesting in view of the growing knowledge of tumor suppressor genes.
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Affiliation(s)
- R R Rackley
- Department of Pathology, Case Western Reserve University, Cleveland, OH 44106
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984
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Abstract
A dichotomy of suicidal individuals previously proposed (impulsive versus chronically disturbed) is shown to parallel a dichotomy of irrational behavior described in 1962 by Gary Becker.
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Affiliation(s)
- D Lester
- Psychology Program, Richard Stockton State College, Pomona, NJ 08240
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985
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Allen NS, Hardy SJ, Jacobine AF, Glaser DM, Yang B, Wolf D, Catalina F, Navaratnam S, Parsons BJ. Photochemistry and photopolymerization activity of perester derivatives of benzophenone. J Appl Polym Sci 1991. [DOI: 10.1002/app.1991.070420501] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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986
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Yu R, Li X, Song L, Zhang R, Zhu T, Yang G, Li Z, Yang B. [Toxic principles of Oxytropis glabra DC]. Zhongguo Zhong Yao Za Zhi 1991; 16:160-3, 191. [PMID: 1883498] [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: 12/29/2022]
Abstract
Eight alkaloids were isolated from Oxytropis glabra and identified as anagirine, thermopsine, N-methylcytisine, sparteine, baptifoline, adenine, dictamnine and ethyl allophanate respectively by spectral analysis and physicochemical methods. All these alkaloids were isolated from this genus for the first time and ethyl allophanate was found in nature for the first time.
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987
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Abstract
Evidence was found for the role of social integration in affecting suicide rates both in a time-series analysis and in a regional analysis for the Austro-Hungarian Empire in the nineteenth and early twentieth centuries. The social correlates of the homicide rates were, however, quite different from those of the suicide rates.
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Affiliation(s)
- G Ausenda
- Richard Stockton State College, Pomona, NJ 08240
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988
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Yang B, Lester D, Wachter S. Subjective stress and productivity in real estate sales people: a replication. Psychol Rep 1990; 67:738. [PMID: 2287663 DOI: 10.2466/pr0.1990.67.3.738] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/27/2023]
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989
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990
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Abstract
A time-series study of suicide in the USA from 1940 to 1984 explored the extent to which social and economic variables could predict the actual suicide rate, the smoothed trend in the suicide rate, and deviations of the actual suicide rate from the smoothed trend. It was found that the social and economic variables were more successful in predicting the smoothed trend in the suicide rate.
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Affiliation(s)
- B Yang
- Department of Economics, Drexel University, Philadelphia, Pennsylvania
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991
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Yang B, Luan Y. [Reconstitution of rabbit brain GABA binding protein (receptor) on Xenopus oocytes]. Hua Xi Yi Ke Da Xue Xue Bao 1990; 21:366-9. [PMID: 1965592] [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: 12/29/2022]
Abstract
Gurdon's Xenopus laevis oocyte translation system has been extensively employed to investigate the molecular biology of gamma-aminobutyric acid (GABA) receptors in the brains of embryonic chick, rat, etc. As GABA and its receptor may play a role in the pathogenesis of hepatic encephalopathy and a rabbit model of fulminant hepatitis has been established, we reconstituted the rabbit model of fulminant hepatitis has been established, we reconstituted the rabbit brain GABA binding protein (receptor) on Xenopus laevis oocytes to offer a base for further study of the pathological effects of GABA receptor at molecular level. In this report, total RNA was extracted from rabbit brain by guanidine hydrochloride method. The total RNA was then subjected to oligo-(dT)-cellulose affinity chromatography to isolate mRNA. All the RNA samples achieved a high purity with an average OD260/OD280 ratio of about 2.10. The clear bands of 18 S and 28S rRNA in electrophoresis implied that the RNA was not degraded and was therefore available for expression. After two days of incubation of the oocytes injected with mRNA, radioreceptor assay indicated that saturable and specifically displaceable GABA binding sites were implanted onto the oocyte membrane. This result led us to the conclusion that rabbit brain GABA binding protein (receptor) can be reconstituted by injecting exogenous mRNA inclusive of those encoding the receptor into Xenopus oocytes. However, the functional activity of the reconstituted receptor as a GABA gated chloride ion channel needs to be further characterized by patch clamping.
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992
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Abstract
This paper describes an optimization method for reducing the length of protocol conformance test sequences by overlapping test subsequences obtained using UIO sequences. It is shown that test sequences generated by this method are substantially shorter than those generated by other methods employing UIO sequences.
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Affiliation(s)
- B. Yang
- Department of Computer Science, University of Ottawa, Ottawa, Ontario, Canada KlN 9B4
| | - H. Ural
- Department of Computer Science, University of Ottawa, Ottawa, Ontario, Canada KlN 9B4
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993
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Abstract
In preparations of Wistar rat myocardium, Km values of GSH-Px to the substrates, H2O2 and GSH, as determined by the DTNB method, were 1.9 x 10(-4) mol/L and 2.0 x 10(-3) mol/L respectively. The Km value of GSSG-R to GSSG was 6.0 x 10(-5) mol/L by UV spectrophotometric assay. In vitro, the activity of GSH-Px was inhibited by 1.0, 6.0 and 16.0 mmol/L synthetic moniliformin (MF) with the corresponding activities of 89.4%, 65.2% and 47.9% of control values (n = 6). The activities of GSSG-R in the presence of 16.0 and 32.0 mmol/L MF were 74.4% and 61.9% of controls (n = 5) respectively. These results revealed that the inhibition of GSH-Px by MF was stronger than that of GSSG-R. As determined by Lineweaver-Burk and of Dixon plots, the inhibition of GSH-Px and GSSG-R by MF was competitive and noncompetitive, respectively. The affinity of GSH-Px to MF was higher than that of GSSG-R because the inhibition constant Ki of the former (6.0 mmol/L) was less than that of the latter (39 mmol/L). We suggest that the mechanism of toxic-damaging effects of MF on myocardium, may be closely related to the failure of remove of free radicals by some enzymes, as GSH-Px and GSSG-R, and that MF may be involved in keshan disease.
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Affiliation(s)
- L Y Chen
- Cardiovascular Institute, Chinese Academy of Medical Sciences, Beijing
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994
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Jaszczak JA, Saam WF, Yang B. Growth and dynamical roughening of ideal quasicrystal facets. Phys Rev B Condens Matter 1990; 41:6864-6869. [PMID: 9992941 DOI: 10.1103/physrevb.41.6864] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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995
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Yang B, Saam WF, Jaszczak JA. Numerical study of interfacial properties of two-dimensional aperiodic systems. Phys Rev B Condens Matter 1989; 40:7167-7178. [PMID: 9991103 DOI: 10.1103/physrevb.40.7167] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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996
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997
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Yang B, Lu GW. [Effects of noradrenaline,glycine, gamma-aminobutyric acid and L-glutamic acid on spinal field potentials in the rat]. Sheng Li Xue Bao 1989; 41:184-90. [PMID: 2569764] [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: 01/01/2023]
Abstract
Noradrenaline (NE), glucine (GLY), gamma-aminobutyric acid (GABA) and L-glutamic acid (L-GLU) were locally applied to the dorsal surface of lumbar spinal cord on anesthetized and immobilized rats and their effects on segmental (SP) and descending (DP) spinal field potentials were examined. Both waves N and P of SP and DP were reduced markedly in amplitudes following local application of NE. A significant decrease in amplitude of wave N and a remarkable increase in wave P in both SP and DP were shown during the application of GLY, GABA and L-GLU. The results suggest that these neurotransmitters may be involved in the generation of waves N and P, particularly affecting the activities of interneurons in the spinal dorsal horn.
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998
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Affiliation(s)
- B Yang
- Department of Economics, Drexel University, Philadelphia, PA 19104
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999
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1000
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Mu SH, Fan ZH, Lao WN, Yang B. [Surveillance of antibodies to human influenza A and B virus in swine population in different seasons in Chengdu]. Hua Xi Yi Ke Da Xue Xue Bao 1988; 19:177-9. [PMID: 3198101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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