10251
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Chen WT, Wang J, Hasegawa T, Yamada SS, Yamada KM. Regulation of fibronectin receptor distribution by transformation, exogenous fibronectin, and synthetic peptides. J Biophys Biochem Cytol 1986; 103:1649-61. [PMID: 3023389 PMCID: PMC2114398 DOI: 10.1083/jcb.103.5.1649] [Citation(s) in RCA: 98] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Recent studies have shown that fibronectin and its 140K membrane receptor complex are spatially associated with microfilaments to form cell surface linkage complexes which are thought to mediate adhesive interactions between fibroblasts and their substrata. We examined the regulation of the organization of these cell surface structures in transformed and fibronectin-reconstituted cells as well as in cells treated with a competitive synthetic peptide inhibitor of fibronectin binding to its receptor. Correlative localization experiments with interference reflection microscopy and double-label or triple-label immunofluorescence revealed a concomitant loss of fibronectin, 140K receptor, and alpha-actinin colocalization at cell substratum extracellular matrix contact sites after transformation of chick fibroblasts by wild-type or temperature-sensitive Rous sarcoma viruses (RSV). Western and dot immunoblot analyses established that although similar total quantities of intact 140K molecules were present in the transformed cell cultures, significantly more was released into the culture medium of transformed cells. The 140K molecules on transformed cells were available for interaction with exogenously added fibronectin, which could reconstitute fibronectin-140K linkage complexes. In such fibronectin reconstitution experiments, many cells expressed both fibronectin-140K-actin linkage complexes and RSV pp60src, indicating that the morphological reversion could occur even in the continued presence of RSV transformation. The synthetic peptide Gly-Arg-Gly-Asp-Ser derived from the sequence of the cell-binding region of fibronectin could also prevent the organization of fibronectin-140K linkage complexes. Our results suggest that fibronectin interaction with cells regulates the organization of fibronectin receptor complexes and cytoskeletal components at the cell surface.
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10252
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Wang J, Tapia T, Bonakdar M. Sensitive adsorptive stripping voltammetric measurements of antihypertensive drugs. Analyst 1986; 111:1245-8. [PMID: 3813034 DOI: 10.1039/an9861101245] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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10253
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Wang J, Chen KH, Mazur E. Time-resolved spontaneous Raman spectroscopy of infrared-multiphoton-excited SF6. PHYSICAL REVIEW. A, GENERAL PHYSICS 1986; 34:3892-3901. [PMID: 9897732 DOI: 10.1103/physreva.34.3892] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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10254
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Chen YQ, Wang J, Liu YZ, Yu SY. [Mechanism of cell damage by hematoporphyrin derivatives (HPD) plus light--I. Photooxidation of hepatoma cell membrane by HPD plus light]. ZHONGHUA ZHONG LIU ZA ZHI [CHINESE JOURNAL OF ONCOLOGY] 1986; 8:413-6. [PMID: 2953583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Ascitic hepatoma cells of mice were incubated with three HPD. After the cell-bound HPD was treated by visible light, the product of membrane lipid peroxidation--malondialdehyde (MDA) was determined. The results showed that the MDA level increased with HPD concentration and exposure time, but it was unchanged in the control. Beta-carotene, a quencher of singlet oxygen, could inhibit the lipid photooxidation of the membrane of cell-bound HPD resulting in a decrease of MDA level which decreased with increase of beta-carotene concentration. Adding vitamin E in vitro and vivo, formation of the product of membrane lipid peroxidation of cell-bound HPD by light was inhibited and the MDA level decreased with the increase of vitamin E concentration. These results show that the singlet oxygen, produced by HPD bound cells following light activation, reacts directly with the polyunsaturated fatty acids on cell membrane to produce lipid peroxides leading to cellular damage.
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10255
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Wang J, Bonakdar M. Liquid chromatography of reserpine and rescinnamine using electrochemical detection. JOURNAL OF CHROMATOGRAPHY 1986; 382:343-8. [PMID: 2878006 DOI: 10.1016/s0378-4347(00)83541-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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10256
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Wang J, Farias PA, Mahmoud JS. Measurements of low concentrations of diltiazem by adsorptive stripping voltammetry and flow amperometry. Analyst 1986; 111:837-9. [PMID: 3752525 DOI: 10.1039/an9861100837] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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10257
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Wang J, Tuzhi P. Enhanced stability of glassy carbon detectors following a simple electrochemical pretreatment. Anal Chem 1986; 58:1787-90. [PMID: 3752510 DOI: 10.1021/ac00121a041] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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10258
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Wang J, Suthanthiran M, Walle A, Lagman M, Schwartz R, Murthi V, Novogrodsky A, Stenzel KH. Anti-tumor properties of lymphocytes activated by the oxidizing mitogens. THE JOURNAL OF IMMUNOLOGY 1986. [DOI: 10.4049/jimmunol.136.12.4735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Abstract
Human peripheral blood mononuclear cells when activated with the oxidizing mitogens, neuraminidase/galactose oxidase or sodium periodate, express cytolytic activity for freshly isolated tumor cells and for a variety of cell lines, including NK-resistant solid tumor lines. Normal lymphoid cells are not targets for cytotoxicity and do not inhibit lysis of susceptible targets mediated by the oxidizing mitogen-activated mononuclear cells. The cytotoxic response is rapidly generated and reaches peak levels at 48 hr. The oxidizing mitogens induce expression of IL 2 receptors on peripheral blood mononuclear cells. Combined treatment of cells with IL 2 and the oxidizing mitogens results in a marked enhancement of cytotoxicity. Enhancement is achieved at levels of IL 2 that alone result in minimal generation of cytotoxic cells. Growth of a human renal cancer cell line in nude mice was inhibited when the renal cancer cells were injected together with oxidizing mitogen-activated human mononuclear cells. These studies indicate that oxidizing mitogen-activated cells provide a potentially valuable source of material for the adoptive immunotherapy of tumors.
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10259
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Wang J, Suthanthiran M, Walle A, Lagman M, Schwartz R, Murthi V, Novogrodsky A, Stenzel KH. Anti-tumor properties of lymphocytes activated by the oxidizing mitogens. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 1986; 136:4735-9. [PMID: 3011903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Human peripheral blood mononuclear cells when activated with the oxidizing mitogens, neuraminidase/galactose oxidase or sodium periodate, express cytolytic activity for freshly isolated tumor cells and for a variety of cell lines, including NK-resistant solid tumor lines. Normal lymphoid cells are not targets for cytotoxicity and do not inhibit lysis of susceptible targets mediated by the oxidizing mitogen-activated mononuclear cells. The cytotoxic response is rapidly generated and reaches peak levels at 48 hr. The oxidizing mitogens induce expression of IL 2 receptors on peripheral blood mononuclear cells. Combined treatment of cells with IL 2 and the oxidizing mitogens results in a marked enhancement of cytotoxicity. Enhancement is achieved at levels of IL 2 that alone result in minimal generation of cytotoxic cells. Growth of a human renal cancer cell line in nude mice was inhibited when the renal cancer cells were injected together with oxidizing mitogen-activated human mononuclear cells. These studies indicate that oxidizing mitogen-activated cells provide a potentially valuable source of material for the adoptive immunotherapy of tumors.
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10260
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Hutchins-Kumar LD, Wang J, Tuzhi P. Parallel dual-electrode detection based on size exclusion for liquid chromatography/electrochemistry. Anal Chem 1986; 58:1019-23. [PMID: 3717564 DOI: 10.1021/ac00297a008] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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10261
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Weiner CP, Herrig J, Wang J, Wang L, Farley D, Van Orden D, Chestnut D. Chronic measurement, using a Doppler probe, of uterine artery flow in the gravid guinea-pig. JOURNAL OF REPRODUCTION AND FERTILITY 1986; 77:247-56. [PMID: 3522891 DOI: 10.1530/jrf.0.0770247] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A chronic animal model is described which permits for the first time the continuous measurement of uterine artery blood flow velocity in the pregnant guinea-pig by using a miniaturized Doppler flow probe. Preliminary validation revealed that alterations in actual blood flow are directly and proportionally related to the change in the Doppler shift (r = 0.984) from 0 to 100 ml/h. The velocity signal baseline was as stable as that of systemic blood pressure. Depending upon the individual animal's flow velocity, a deviation of 2-5% from baseline was statistically significant. With experience, greater than 90% of preparations were successful and a 30-day interval was often available for study. Uterine artery flow velocity increased steadily between 45 and 55 days of gestation. Instrumentation did not result in fetal growth retardation. A reduction in flow velocity occurred during general anaesthesia using ketamine and the antianxietal xylazine. In agreement with the reports of other investigators using a different model, both hydralazine and angiotensin II increased uterine blood velocity and adrenaline reduced it.
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10262
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Nishimura RN, Wang J, Merrill JE, Mickey MR, Myers LW. Quantitation of myelination and demyelination by the measurement of myelin basic protein by ELISA. J Neurol Sci 1986; 73:317-24. [PMID: 2425056 DOI: 10.1016/0022-510x(86)90156-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Utilizing a competitive inhibition enzyme-linked immunosorbent assay (ELISA) we measured the amount of myelin basic protein (MBP) in brain, liver, and kidney of newborn mouse and compared these values with myelinated cerebellar explant cultures under various conditions. Explant cultures demyelinated with anti-myelin serum showed a 90% decrease in MBP when compared with controls. These results correlated with myelination and demyelination as observed by light microscopy. Newborn tissues including brain showed only negligible activity for MBP. This technique provides a sensitive and objective method for quantitating in-vitro demyelination.
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10263
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Wang J. Evaluation and improvement of the resolution of voltammetric measurements. Talanta 1986; 33:397-400. [DOI: 10.1016/0039-9140(86)80104-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/1985] [Revised: 12/19/1985] [Accepted: 01/06/1986] [Indexed: 11/17/2022]
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10264
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Wang J, Bonakdar M, Morgan C. Voltammetric measurement of tricyclic antidepressants following interfacial accumulation at carbon electrodes. Anal Chem 1986; 58:1024-8. [PMID: 3717565 DOI: 10.1021/ac00297a009] [Citation(s) in RCA: 51] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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10265
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Wang J, He RR. [Advances in research on arterial baroreceptor resetting]. SHENG LI KE XUE JIN ZHAN [PROGRESS IN PHYSIOLOGY] 1986; 17:107-11. [PMID: 3538393] [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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10266
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Lubensky TC, Wang J. Percolation conductivity exponent t to second order in epsilon =6-d. PHYSICAL REVIEW. B, CONDENSED MATTER 1986; 33:4998-5009. [PMID: 9938970 DOI: 10.1103/physrevb.33.4998] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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10267
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Hargrave PA, Adamus G, Arendt A, McDowell JH, Wang J, Szaby A, Curtis D, Jackson RW. Rhodopsin's amino terminus is a principal antigenic site. Exp Eye Res 1986; 42:363-73. [PMID: 2423355 DOI: 10.1016/0014-4835(86)90030-8] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Antisera and monoclonal antibodies to rhodopsin were examined for their binding specificity to rhodopsin by using peptides from the rhodopsin sequence as competitors for antibody binding to rhodopsin in an enzyme-linked immunoassay. Monoclonal antibodies tested were raised in mice against bovine and rat rhodopsin. Antisera tested were raised in sheep against bovine rhodopsin and in rabbits against human rhodopsin. Peptides were synthesized from the bovine rhodopsin sequences 2-32, 1-12, 13-23, 24-34, 5-11, 231-252 and 331-348 for use as competitors in the immunoassay. A mixture of soluble CNBr peptides, and the purified CNBr peptide representing the sequence 2-39 were also employed. The monoclonal antibodies were all anti-amino-terminal in their binding specificity, although each recognized slightly different regions of the amino terminus. Each of the three antisera was predominantly directed against rhodopsin's amino terminus. We conclude that the amino-terminal 30 or more amino acids, and particularly the amino-terminal 15 amino acids, represent a principal antigenic region of the rhodopsin molecule.
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10268
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10269
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Wang J, Hutchins-Kumar LD. Cellulose acetate coated mercury film electrodes for anodic stripping voltammetry. Anal Chem 1986; 58:402-7. [PMID: 3963396 DOI: 10.1021/ac00293a031] [Citation(s) in RCA: 69] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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10270
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Toole JJ, Pittman D, Murtha P, Wasley LC, Wang J, Amphlett G, Hewick R, Foster WB, Kamen R, Kaufman RJ. Exploration of structure-function relationships in human factor VIII by site-directed mutagenesis. COLD SPRING HARBOR SYMPOSIA ON QUANTITATIVE BIOLOGY 1986; 51 Pt 1:543-9. [PMID: 3034488 DOI: 10.1101/sqb.1986.051.01.066] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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10271
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Weinsier RL, Norris DJ, Birch R, Bernstein RS, Pi-Sunyer FX, Yang MU, Wang J, Pierson RN, Van Itallie TB. Serum insulin and blood pressure in an obese population. Int J Obes (Lond) 1986; 10:11-7. [PMID: 3519484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Serum insulin has been implicated as a determinant of blood pressure (BP) level in obese hypertensive individuals. We examined the relationships among fasting insulin, mean arterial pressure (MAP), body composition, and fat distribution in 204 subjects unselected for glucose tolerance. All met the criteria of taking no oral hypoglycemic agents, insulin or antihypertensive medications. 95 percent were considered obese and 78 percent were female. Mean age was 39 years (range 15-71), percent ideal body weight (IBW) 171 percent (109-332), BP 125/81 mmHg (80-181/50-110) and fasting insulin 44 microU/ml (4-196). Lean body mass (LBM) and body fat were measured by tritium dilution. The correlation coefficient between insulin and MAP was 0.32 (P less than 0.0001). Both insulin and MAP correlated highly with percentage IBW, percentage body fat, fat mass, LBM, body build and upper fat pattern. Controlling for these variables simultaneously eliminated the association between insulin and BP. By contrast, the correlations between MAP and measures of body composition and fat distribution retained significance after controlling for insulin level. These findings suggest that measures of body composition and fat distribution have a relationship with BP that is not entirely accounted for by serum insulin level, and the relationship between serum insulin and BP is indirect and largely accounted for by their mutual association with measures of body composition and fat distribution.
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10272
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Wang J, Zadeii J. Determination of traces of gallium based on stripping voltammetry with adsorptive accumulation. Anal Chim Acta 1986. [DOI: 10.1016/0003-2670(86)80050-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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10273
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Kotler DP, Wang J, Pierson RN. Body composition studies in patients with the acquired immunodeficiency syndrome. Am J Clin Nutr 1985; 42:1255-65. [PMID: 3865530 DOI: 10.1093/ajcn/42.6.1255] [Citation(s) in RCA: 309] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Body composition studies were performed in 33 patients suffering from the acquired immunodeficiency syndrome (AIDS). Studies included measurements of total body potassium, fat, and total body and extracellular water volumes plus serum retinol binding protein concentration, iron binding capacity, and albumin concentration. AIDS patients were underweight (p less than 0.001) and were depleted of potassium (p less than 0.001) with the lowest values occurring in patients close to death at the time of study. Body fat contents also were reduced. Intracellular water volumes were decreased in the AIDS patients (p less than 0.001) with a relative increase in extracellular water volume (p less than 0.001). Serum protein concentrations were decreased in the AIDS patients. Longitudinal studies did not demonstrate tissue repletion in patients with AIDS, despite apparent clinical stability. These studies demonstrate that severe, progressive malnutrition occurs in patients with AIDS. If malnutrition can be shown to have a deleterious effect upon the disease course, therapy of malnutrition may play an important role in the treatment of this disorder.
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10274
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Wang J, Harris AB. Bond orientational order in the randomly diluted elastic network. PHYSICAL REVIEW LETTERS 1985; 55:2459-2462. [PMID: 10032150 DOI: 10.1103/physrevlett.55.2459] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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10275
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Wang J, Bonakdar M, Deshmukh BK. Measurement of labetalol by high-performance liquid chromatography with electrochemical detection. JOURNAL OF CHROMATOGRAPHY 1985; 344:412-5. [PMID: 4086567 DOI: 10.1016/s0378-4347(00)82050-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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