6451
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Konttinen YT, Grönblad M, Hukkanen M, Kinnunen E, Santavirta S, Polak JM, Gibson S, Zhao Y, Mapp P, Revell P. Pain fibers in osteoarthritis: a review. Semin Arthritis Rheum 1989; 18:35-40. [PMID: 2543082 DOI: 10.1016/0049-0172(89)90014-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Y T Konttinen
- Fourth Department of Medicine, University of Helsinki
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6452
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Liu LS, Zhao Y, Lei YP, Wang W, Zhang XE, Jin L. Calcium antagonists in prevention of hypertension and stroke in stroke-prone spontaneously hypertensive rats. Chin Med J (Engl) 1989; 102:106-13. [PMID: 2505975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
To investigate the effect of Calcium antagonists (Ca-An) with different tissue specificity in the development of hypertension and stroke in salt-loading SHRSP, three experiments were conducted. In experiment I (1), 50 8-week-old male SHRSP were divided into three groups and given nifedipine (NF, 32 mg/kg/day), menidipine (MN 32 mg/kg/day) and placebo (control group) respectively. In the control group 83.3% (15/18) died of stroke and 17 showed renal vascular sclerosis. Their average lifespan was 84 days. NF and MN significantly reduced systolic blood pressure (SBP), and no stroke of renal vascular sclerosis developed. In experiment I (2), 54 7-week-old male SHRSP were divided into three groups (18 in each group). They were treated with nimodipine (NM) 20 mg/kg/day, 2 mg/kg/day and placebo respectively. NM (20 mg/kg/day) markedly lowered SBP and postponed the onset of stroke. Only 11% died in 17 weeks. NM (2 mg/kg/day did not lower SBP but postpond the onset of stroke. In experiment II (1), 29 10-week-old female SHRSP were divided into three groups: Group A was given NF 32 mg/kg/day, group B was parathyroidectomized (PTX) and group C served as control. PTX group did not lower SBP but could postpone the onset of stroke. In experiment II (2), 33 male SHRSP were divided into three groups and ticated as described above in experiment II (1) (11 in each group). Seven weeks after the experiment, the brain blood flow of NF group was significantly greater (67.5%) than that of the control and PTX groups. In experiment III, 27 7-week-old male SHRSP were divided into three groups as described above in experiment I (2).(ABSTRACT TRUNCATED AT 250 WORDS)
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6453
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Zhou Y, Zhao Y, Zhong G, Zhu T, Tang Z. Tumor localization in hepatoma-bearing nude mice by radioiodinated N-pyridoxyl-5-methyl-tryptophan. J Labelled Comp Radiopharm 1989. [DOI: 10.1002/jlcr.2580260156] [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: 11/06/2022]
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6454
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Power RF, Wharton J, Zhao Y, Bloom SR, Polak JM. Autoradiographic localization of endothelin-1 binding sites in the cardiovascular and respiratory systems. J Cardiovasc Pharmacol 1989; 13 Suppl 5:S50-6; discussion S74. [PMID: 2473328 DOI: 10.1097/00005344-198900135-00013] [Citation(s) in RCA: 95] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Specific high-affinity binding sites for endothelin-1 (ET-1) have been demonstrated in peripheral tissues using the technique of in vitro receptor autoradiography. Binding was time dependent and saturable and inhibited by coincubation with an excess of unlabeled ET-1 but resistant to dissociation. Binding sites were localized to blood vessels of all sizes including coronary arteries, intrapulmonary vessels, and intrarenal and intrasplenic arteries. In addition, high-affinity binding sites were identified on airway smooth muscle, over alveolar septa, and on nerve trunks. Scatchard analysis of the data revealed a Bmax of 250 amol/mm2 and a Kd of 0.1 nM for the binding of rat tracheal smooth muscle, with similar values for porcine coronary artery. The localization of binding sites is consistent with the known effects of ET-1 and suggests a direct action on specific receptors.
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Affiliation(s)
- R F Power
- Department of Histochemistry, Hammersmith Hospital, London, England
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6455
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Xuan WY, Zhao Y, Li AY, Xie PS, Cai Y. Experimental studies on the antimalarial activity estimation by artesunate and artemether preparations per skin absorption. J TRADIT CHIN MED 1988; 8:282-4. [PMID: 3073264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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6456
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Sheng ZY, Lai YF, Wang HB, Zhao Y. Changes in erythrocyte membranes in burned rabbits. Burns 1988; 14:287-91. [PMID: 2852050 DOI: 10.1016/0305-4179(88)90068-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Eighteen white rabbits were subjected to a 30 per cent TBSA full thickness burn. Wound infection was found 9-13 days after injury and became severe a week or so later. ATPase activities, antioxidation ability, the proteins of erythrocyte membranes, and the Na+ contents of erythrocytes and serum were determined. The Ca++-ATPase activity was elevated during the first 17 days postburn, but showed a decline at the time of severe wound infection; the Na+,K+-ATPase activity showed peaks on postburn days 2 and 6, and then fluctuated above the preburn level. The change in Mg++-ATPase activity was similar to Na+,K+-ATPase. The erythrocyte Na+ content was increased, and the level of serum Na+ was decreased up to postburn day 6. Subsequently the erythrocyte Na+ was reduced and the serum Na+ increased up to day 17 postburn. The percentage of erythrocyte haemolysis in H2O2 was increased after the burn and became markedly so during wound infection, indicating that the antioxidation ability of burned rabbit erythrocytes was markedly impaired. During the period of wound infection, Coomassie blue-stained protein bands in SDS-polyacrylamide gel showed some changes in size and proportion in burned rabbits. For example, the second band was wider, the band 2 to band 1 ratio increased, and band 5 was smaller than before injury. These results seem to show that burn injury, especially when associated with sepsis, may affect both the structure and function of biological membranes.
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Affiliation(s)
- Z Y Sheng
- Trauma Center, Postgraduate Medical College, PLA Beijing, People's Republic of China
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6457
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Gui J, Wang R, Zhao Y. Determination of and the effect of heat treatment on the χ parameter of 18R1martensite in Cu–Zn–Al alloys. J Appl Crystallogr 1988. [DOI: 10.1107/s0021889888002948] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [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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6458
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Zhao Y, Lea TK, Schotland RM. Correction function for the lidar equation and some techniques for incoherent CO(2) lidar data reduction. Appl Opt 1988; 27:2730-2740. [PMID: 20531829 DOI: 10.1364/ao.27.002730] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The convolution effect in CO(2) lidar return signals caused by the long laser pulse is analyzed by modifying the original lidar equation and introducing a correction function C(r)(R). The characteristics of C(r)(R) are discussed in detail, leading to a deconvolution technique consisting of a two-step iteration procedure for the extraction of both the ackscattering coefficient and the gas species content in differential absorption lidar measurement.
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6459
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Zhao Y, Hardesty RM. Technique for correcting effects of long CO(2) laser pulses in aerosol-backscattered coherent lidar returns. Appl Opt 1988; 27:2719-2729. [PMID: 20531828 DOI: 10.1364/ao.27.002719] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The convolution effect in aerosol backscattered CO(2) coherent lidar returns caused by the long tail of the laser pulse is analyzed by modifying the original lidar equation and introducing a correction function C(r)(R). The characteristics of the correction function and its effect on differential absorption lidar water vapor measurements are investigated for coherent lidars. A deconvolution technique is developed consisting of a leastsquares fitting and iteration procedure for retrieval of the mean value of the atmospheric backscattering coefficient beta and a reverse filtering procedure for estimating the fluctuation components of the beta profile. Data obtained with the WPL coherent CO(2) lidar are reanalyzed using the above method, giving improved estimates of the structures and the mean water vapor content.
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6460
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Schotland RM, Cvijin PV, Zhao Y, Hudor AM. Conceptual test of frequency diversity lidar. Appl Opt 1988; 27:441-443. [PMID: 20523614 DOI: 10.1364/ao.27.000441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
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6461
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Abstract
Field data on calving difficulty scores provided by the American Simmental Association were subjected to two methods of analysis: ordinary least-squares analysis and maximum likelihood with an assumed threshold model. In each analysis, the model included the interaction of sex of calf X age of dam. This interaction was readily apparent in the data (observed scale): within the youngest dams 58% of the heifer calves and 37% of the bull calves were born unassisted vs 96% and 92%, respectively, in the oldest dams. The objective was to determine if this interaction would be greatly reduced or would disappear on the underlying scale of a threshold model. The least-squares estimate of the sex difference was greatest within the youngest age-of-dam group (18 to 24 mo) and steadily declined with increasing age of dam, approaching zero for dams 6 yr and older. In contrast, the estimates of the sex difference from the threshold analysis were remarkably similar across ages of dam. It was concluded that observed interactions in calving ease data could be adequately described by a threshold model in which the effects of age of dam and sex of calf act additively on the underlying variable.
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Affiliation(s)
- R L Quaas
- Dept. of Anim. Sci., Cornell University, Ithaca, NY 14853
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6462
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Zhao Y, Li AY, Xie PS, Hou HM, Gu WG, Jia MH, Liu X, Lei TK. Experimental studies on the effect of artesunate sustained released tablet on Plasmodium cynomolgi. J TRADIT CHIN MED 1987; 7:287-9. [PMID: 3449712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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6463
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Wang SF, Zhao Y, Fu QL, Yin MB, Liu YY. [Detection of cytomegalovirus (CMV) DNA sequence in biopsy samples of cervical cancer]. Zhonghua Zhong Liu Za Zhi 1987; 9:279-81. [PMID: 2824151] [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: 01/02/2023]
Abstract
Biopsy samples of the cervical cancer and cervicitis were analysed by HCMV-DNA hybridization method. The results indicated that HCMV-DNA was detected in 21 (36%) of 59 cervical cancer and 6 (21%) of 28 cervicitis specimens, using 32P-DNA probe containing transformation gene (14% of total genome) to hybridize. None of 25 cervical cancer and 19 cervicitis samples showed positive HCMV-DNA, using 32P-DNA probe without transformation gene (76% of total genome). The preliminary results show that the sequence of CMV transformation gene is present in about one third of cervical cancer and one fifth of cervicitis biopsy samples tested. This detection rate is lower than that of Taiwan Province and Africa, and slightly higher than that of the USA and Finland. The relation between the HCMV and cervical cancer is being further studied.
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Affiliation(s)
- S F Wang
- Fourth Hospital, Hebei Medical College, Shijiazhuang
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6464
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Ye LZ, Ma SW, Zhao Y, Li SH, Zhang JC, Sun NH, Luo HY. [Cytogenetic studies on 60 couples with habitual abortions]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1987; 9:226-8. [PMID: 2958163] [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: 01/03/2023]
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6465
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Zhao Y, Liu CY, Cheng ZY, Ye LZ, Gao CS, Ma SW, Zhang JC, Shi HP, Yuan LF, Luo HY. [Chromosome analysis of 1133 cases in genetic counseling clinic]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1987; 9:157-64. [PMID: 2958156] [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: 01/03/2023]
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6466
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Zhao Y, Hall IH, Oswald CB, Yokoi T, Lee KH. Antimalarial agents. III. Mechanism of action of artesunate against Plasmodium berghei infection. Chem Pharm Bull (Tokyo) 1987; 35:2052-61. [PMID: 3311413 DOI: 10.1248/cpb.35.2052] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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6467
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Zhao Y, Li W, Chou IN. Cytoskeletal perturbation induced by herbicides, 2,4-dichlorophenoxyacetic acid (2,4-D) and 2,4,5-trichlorophenoxyacetic acid (2,4,5-T). J Toxicol Environ Health 1987; 20:11-26. [PMID: 3806697 DOI: 10.1080/15287398709530958] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
To understand the mechanisms of toxicity of 2,4-dichlorophenoxyacetic acid (2,4-D) and 2,4,5-trichlorophenoxyacetic acid (2,4,5-T), we have studied their effects on the cytoskeletal organization, particularly microtubules (MT) and microfilaments (MF), DNA synthesis, and the synthesis and composition of cytoskeletal proteins in mouse 3T3 cells. Exposure of cells to 2,4-D or 2,4,5-T resulted in a dose-dependent inhibition of DNA synthesis; 50% inhibition occurred at 2.21 mM and 0.90 mM for 2,4-D and 2,4,5-T, respectively. Furthermore, a strong synergistic inhibition of DNA synthesis was produced by mixtures (each having a total concentration of 1.25 mM) of 2,4-D with 2,4,5-T. Similarly, 2,4,5-T is more potent than 2,4-D in causing cytoskeletal perturbation as revealed by fluorescence microscopy. Treatment of cells with 2,4-D (2.5 mM) or 2,4,5-T (1.25 mM) for 20 h resulted in severe MT aggregation and the appearance of large bundles, which were organized in a rope-like structure in the former and a dramatic octopus-like pattern in the latter. Further, MT bundling is particularly severe in the cell center. Under these conditions, marked changes in MF organization also occurred as evidenced by clustering and crisscrossing of MF in the perinuclear region. A 1:1 mixture (final = 1.25 mM) of 2,4-D and 2,4,5-T, a formulation equivalent to Agent Orange composition, also induced a dramatic perturbation to the organization of MT and MF, resulting in the formation of ring-like structures. MT bundling is still apparent, especially around the outer edge of the "rings." MF are localized predominantly along the cell periphery, where they appear to be aggregated tightly forming patches. Surprisingly, the synthesis and composition of cytoskeletal proteins, which are resistant to detergent extraction but released by CaCl2, are essentially unaffected by 2,4-D or 2,4,5-T. These results suggest that the dramatic perturbation of the cytoskeletal morphology caused by these herbicides probably only results from a structural reorganization and redistribution of MT and MF.
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6468
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Abstract
A thermophilic, autotrophic methanogen (strain CB12, DSM 3664) was isolated from a mesophilic biogas digestor. This bacterium used H
2
-CO
2
or formate as a substrate and grew as short rods, sometimes in pairs and in crooked filaments. Motility was not observed. Its optimum temperature (56°C) was lower than that of other thermophilic members of the genus
Methanobacterium
. The maximum observed specific growth rate was 0.564 h
−1
(74-min doubling time).
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Affiliation(s)
- Y Zhao
- Institute of Biology, Academia Sinica, Chengdu, China, and Division of Environmental and Occupational Health Sciences, School of Public Health, University of California, Los Angeles, California 90024
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6469
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Zhao Y. Studies on systemic pharmacological effects of artesunate. J Trop Med Hyg 1985; 88:391-6. [PMID: 3939245] [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: 01/08/2023]
Abstract
These studies report that artesunate at lower dosage levels (100 mg kg-1 i.v. or i.p.) in animals (the dosage of artesunate in human clinical use as an antimalarial is 2 mg kg-1 i.v.) had no significant systemic pharmacological effects, i.e. artesunate had a relatively high selectivity as an antimalarial. However, at higher dosage levels there was an appearance of sedative effects, lowered movement of synchronism, elevation of tolerated lack of oxygen, lowered body temperature, analgesia, muscle relaxation, tremor, convulsions, depressed respiration and heart beat, lowered blood pressure, and depressed activity of the gastrointestinal tract.
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6470
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6471
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Yao C, Zhao Y. [The family planning work as suggested by analysis of the age at first marriage in Jiaxing Prefecture, Zhejiang Province]. Renkou Yanjiu 1984:46-8. [PMID: 12313029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
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6472
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Zhong HL, Feng LB, Wang CX, Kang B, Wang ZZ, Zhou GH, Zhao Y, Zhang YZ. Human infection with macracanthorhychus hirudinaceus causing serious complications in China. Chin Med J (Engl) 1983; 96:661-8. [PMID: 6418464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
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6473
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Huang GJ, Zhao Y. Experimental studies of the effect of sodium artesunate on the immune functions of mice. J TRADIT CHIN MED 1983; 3:171-6. [PMID: 6556400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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6474
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Zhao Y, Zhang JC, Ye LZ, Luo HY, Qin M. [Sister chromatid exchanges in 15 patients with Down's syndrome]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1983; 5:249-51. [PMID: 6228320] [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: 01/19/2023]
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6475
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Zhao Y. [Does inherited balanced translocation produce phenotypic effects? (author's transl)]. Zhonghua Yi Xue Za Zhi 1981; 61:770-3. [PMID: 6805891] [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: 01/22/2023]
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6476
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Wang ZX, Xu PS, Shen RM, Lin JF, Sun Y, Zhao Y, Shen ML, Zhai SK, Yu WJ. [Comparison of 3H-TdR incorporation and morphologic method in lymphocyte transformation test for immunity in patients suffering from lung cancers (author's transl)]. Zhonghua Zhong Liu Za Zhi 1981; 3:161-4. [PMID: 7338139] [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: 01/24/2023]
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