6701
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Yu X, Zhou W. [The investigation of intrahospital infection in cardiovascular surgery and its nursing strategy]. Zhonghua Hu Li Za Zhi 1991; 26:482-5. [PMID: 1782699] [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: 12/28/2022]
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6702
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Tang S, Deng S, Zhou W. [Isolation and purification of alpha fetal protein utilizing Act-Ultrogel AcA 22 affinity chromatography]. Hua Xi Yi Ke Da Xue Xue Bao 1991; 22:266-9. [PMID: 1721038] [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
In the present communication, we report a method for the isolation and purification of alpha FP from fetal corpse homogenate in a single-step procedure using Act-Ultrogel AcA 22 affinity chromatogrpahy column. This method proves to be better than the conventional method in simplicity, fastness and validity with recovery, purity and immunoreactivity. The immunoreactivity of the purified alpha FP labelled by the method of Hunter and Greenwood (1962) was 50-60% (B/T%). This was similar to alpha FP standard (WHO). The results indicate that the 125I-alpha FP is suitable for alpha FP radioimmunoassay.
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6703
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Zhou W. [Flow cytometric DNA analysis and its relationship with pathology and prognosis in lung carcinoma]. Zhonghua Bing Li Xue Za Zhi 1991; 20:184-6. [PMID: 1664301] [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
DNA content of paraffin-embedded tumour material from 110 patients with lung carcinoma was measured by means of flow cytometry. Aneuploidy was found in 78% of the patients. The mean DNA ploid, the percentage of hyperdiploidy and the percentage of multiploidy in small cell carcinoma and large cell carcinoma were higher than those obtained in squamous cell carcinoma and adenocarcinoma. These values were also higher in grade III squamous cell carcinoma and adenocarcinoma as compared with grade I and II squamous cell carcinoma, and adenocarcinoma. They were also higher in lung carcinoma with the primary tumor size greater than or equal to 3 cm than that less than 3 cm. The five-year survival rate and mid mean survival time of patients with hyperdiploidy were significantly lower than those of patients with diploidy and hypodiploidy. Conclusively, DNA content is considered closely related to the degree of malignancy of lung carcinoma and may be adapted as a reliable criterion in estimating the prognosis of lung carcinoma.
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Affiliation(s)
- W Zhou
- Chinese PLA General Hospital, Beijing
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6704
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Tsang VC, Pilcher JA, Zhou W, Boyer AE, Kamango-Sollo EI, Rhoads ML, Murrell KD, Schantz PM, Gilman RH. Efficacy of the immunoblot assay for cysticercosis in pigs and modulated expression of distinct IgM/IgG activities to Taenia solium antigens in experimental infections. Vet Immunol Immunopathol 1991; 29:69-78. [PMID: 1949584 DOI: 10.1016/0165-2427(91)90053-f] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A recently invented immunoblot assay for human cysticercosis was evaluated for efficacy in pigs. The test population consists of 45 pigs with parasitologically confirmed cysticercosis, 47 with heterologous infections, 45 SPF or concrete raised control animals. With this group of 137 animals the test performance was 100% sensitive and 100% specific. The antigen-specific responses of immunoglobulin A (IgA), IgG and IgM in four pigs infected with Taenia solium eggs derived from a human were quantified by immunoblot. Antigen-specific activities were observed as early as 1 week postinfection. The first antigen-specific isotypic response was IgM antibodies directed against a glycoprotein at 97 KD (GP97). This activity generally disappeared between the sixth and ninth week postinfection. Between Weeks 5 and 8, IgG activity rose as IgM activity fell. The IgG activity, however, was directed mostly towards GP50 and GP42 antigens. If the same response occurs in people with cysticercosis, identifying specific isotype activity may help to distinguish new infection from old.
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Affiliation(s)
- V C Tsang
- Parasitic Diseases Branch, Center for Infectious Diseases, Centers for Disease Control, U.S. Department of Health and Human Services, Atlanta, GA 30333
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6705
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Romero MF, Hopfer U, Madhun ZT, Zhou W, Douglas JG. Angiotensin II actions in the rabbit proximal tubule. Angiotensin II mediated signaling mechanisms and electrolyte transport in the rabbit proximal tubule. Ren Physiol Biochem 1991; 14:199-207. [PMID: 1708906 DOI: 10.1159/000173405] [Citation(s) in RCA: 11] [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] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Angiotensin II (AngII) is a potent regulator of electrolyte transport with biphasic effects on salt and HCO3-resorption in proximal tubule epithelia (PCT). In cultured PCT cells, pM to nM AngII activates a GTP-binding protein to inhibit cAMP formation and thus releases inhibition of apical Na/H exchange. Phospholipase A2 is activated by nM to microM AngII releasing arachidonate which is metabolized by a novel P450 epoxygenase to form 5,6-epoxy-eicosatrienoic acid (5,6-EET). 5,6-EET and nM apical AngII cause dihydropyridine-sensitive Ca2+ influx from the extracellular space, inhibition of apical-to-basolateral Na flux, and decrease in epithelial monolayer short circuit current. 5,6-EET also inhibits Na/K-ATPase by 50%. This P450 epoxygenase is physiologically important in the AngII-signaling system because the P450 inhibitor ketoconazole blocks AngII effects while potentiating exogenous 5,6-EET effects. Finally, these AngII-mediated signaling systems are polarized in the PCT with pM basolateral AngII inhibiting adenylate cyclase and nM apical AngII activating PLA2 and subsequent generation of 5,6-EET.
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Affiliation(s)
- M F Romero
- Department of Genetics, Case Western Reserve University, School of Medicine, Cleveland, Ohio
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6706
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Cecchetti V, Schiaffella F, Tabarrini O, Zhou W, Fravolini A, Goi A, Bruni G, Segre G. Symbiotic approach to drug design: N-[(4-chloro-3-sulfamoylbenzamido)-ethyl]propanolamine derivatives as β-adrenergic blocking agents with diuretic activity. Eur J Med Chem 1991. [DOI: 10.1016/0223-5234(91)90098-8] [Citation(s) in RCA: 6] [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: 11/15/2022]
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6707
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Boyer AE, Tsang VC, Eberhard ML, Zea-Flores G, Hightower A, Pilcher JB, Zea-Flores R, Zhou W, Reimer CB. Guatemalan human onchocerciasis. II. Evidence for IgG3 involvement in acquired immunity to Onchocerca volvulus and identification of possible immune-associated antigens. J Immunol 1991; 146:4001-10. [PMID: 2033268] [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] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Ag-specific isotypic differences in immune response to Onchocerca volvulus Ag were assessed for 778 long term residents of endemic Guatemalan areas by quantitative ELISA with 5-min incubation steps and immunoblot. The study population was separated into five groups based on clinical status: N+F+, N+F-, N-F+, N-F-H+, and N-F-H-, where N = O. volvulus adults (nodule), F = microfiladermia, and H = history of O. volvulus infection. A subset of 44 individuals with high exposure to onchocerciasis from the N-F-H- group were critically evaluated and designated as "putatively immune." IgG1 reactivity to O. volvulus Ag was elevated in the majority of infected persons, but not in putatively immune individuals. Specific IgG3 levels, however, were equally elevated in all groups. The majority of N+F- persons also had elevated IgG1 levels, but they were lower than those found in F+ persons. IgG3 reactivities to a group of antigens at 20 kDa (GP20) were seen in many uninfected persons and some N+F- persons. In contrast, most F+ persons, react to this Ag with IgG1 and not IgG3. A mangabey inoculated with the infectious larval stage of O. volvulus (L3), but showed no signs of infection, began to recognize GP20 at 2 wk postinoculation. Early recognition of GP20 was possibly elicited by the larval stage. Purified nodule Ag from N+F+ individuals contained GP20, however, identical nodule Ag prepared from N+F- individuals did not. These data suggest that GP20 Ag may be common to both uterine microfilaria and the infectious larval stages. The fact that GP20 is predominantly recognized by IgG3 in putatively immune persons and some N+F- persons suggests that this increased IgG3 activity may be important in acquired immunity to onchocerciasis.
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Affiliation(s)
- A E Boyer
- Parasitic Diseases Branch, Centers for Disease Control, Atlanta, GA 30333
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6708
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Boyer AE, Tsang VC, Eberhard ML, Zea-Flores G, Hightower A, Pilcher JB, Zea-Flores R, Zhou W, Reimer CB. Guatemalan human onchocerciasis. II. Evidence for IgG3 involvement in acquired immunity to Onchocerca volvulus and identification of possible immune-associated antigens. The Journal of Immunology 1991. [DOI: 10.4049/jimmunol.146.11.4001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Abstract
Ag-specific isotypic differences in immune response to Onchocerca volvulus Ag were assessed for 778 long term residents of endemic Guatemalan areas by quantitative ELISA with 5-min incubation steps and immunoblot. The study population was separated into five groups based on clinical status: N+F+, N+F-, N-F+, N-F-H+, and N-F-H-, where N = O. volvulus adults (nodule), F = microfiladermia, and H = history of O. volvulus infection. A subset of 44 individuals with high exposure to onchocerciasis from the N-F-H- group were critically evaluated and designated as "putatively immune." IgG1 reactivity to O. volvulus Ag was elevated in the majority of infected persons, but not in putatively immune individuals. Specific IgG3 levels, however, were equally elevated in all groups. The majority of N+F- persons also had elevated IgG1 levels, but they were lower than those found in F+ persons. IgG3 reactivities to a group of antigens at 20 kDa (GP20) were seen in many uninfected persons and some N+F- persons. In contrast, most F+ persons, react to this Ag with IgG1 and not IgG3. A mangabey inoculated with the infectious larval stage of O. volvulus (L3), but showed no signs of infection, began to recognize GP20 at 2 wk postinoculation. Early recognition of GP20 was possibly elicited by the larval stage. Purified nodule Ag from N+F+ individuals contained GP20, however, identical nodule Ag prepared from N+F- individuals did not. These data suggest that GP20 Ag may be common to both uterine microfilaria and the infectious larval stages. The fact that GP20 is predominantly recognized by IgG3 in putatively immune persons and some N+F- persons suggests that this increased IgG3 activity may be important in acquired immunity to onchocerciasis.
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Affiliation(s)
- A E Boyer
- Parasitic Diseases Branch, Centers for Disease Control, Atlanta, GA 30333
| | - V C Tsang
- Parasitic Diseases Branch, Centers for Disease Control, Atlanta, GA 30333
| | - M L Eberhard
- Parasitic Diseases Branch, Centers for Disease Control, Atlanta, GA 30333
| | - G Zea-Flores
- Parasitic Diseases Branch, Centers for Disease Control, Atlanta, GA 30333
| | - A Hightower
- Parasitic Diseases Branch, Centers for Disease Control, Atlanta, GA 30333
| | - J B Pilcher
- Parasitic Diseases Branch, Centers for Disease Control, Atlanta, GA 30333
| | - R Zea-Flores
- Parasitic Diseases Branch, Centers for Disease Control, Atlanta, GA 30333
| | - W Zhou
- Parasitic Diseases Branch, Centers for Disease Control, Atlanta, GA 30333
| | - C B Reimer
- Parasitic Diseases Branch, Centers for Disease Control, Atlanta, GA 30333
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6709
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Yang J, Fang F, Zhu X, Deng S, Zhou W, Xing Z. [The preparation of highly purified insulin and its clinical use. Insulin Cooperative Study Group]. Hua Xi Yi Ke Da Xue Xue Bao 1991; 22:178-80. [PMID: 1786955] [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
Antigenicity of insulin preparations is obviously related to their purity. The average contents of proinsulin, glucagon and pancreatic polypeptide in highly purified insulin (HP-I) produced by us are 76.0, 2.11 and 0.11 ppm respectively. These results are superior to those for domestic conventional crystalline insulin and single peak insulin (SP-I). The antibodies to insulin, proinsulin and pancreatic polypeptide in serum were examined in 24 diabetic patients treated with HP-I for more than 6 months. The positive rates for the above three antibodies were 37.5%, 0% and 0% respectively. The results showed that the antigenicity of HP-I was much lower than that of domestic conventional crystalline insulin and almost the same as that of MC-I from Nordisk, Denmark.
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Affiliation(s)
- J Yang
- Department of Biochemistry, School of Pharmacy
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6710
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Yu M, Ye T, Zhou W, Zhang J. [Pigmentary glaucoma and capsular glaucoma--a clinical and histopathological report]. Yan Ke Xue Bao 1991; 7:82-5. [PMID: 1844065] [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: 12/29/2022]
Abstract
In this paper, 7 cases (13 eyes) of pigmentary glaucoma and 9 cases (12 eyes) of capsular glaucoma were reported. Pigmentary dispersion in pigmentary glaucoma, pseudo-exfoliation material deposition in capsular glaucoma were the classical characteristics in the anterior segment of the eye, but pigmentary scatter was another clinical feature of capsular glaucoma. The histopathological studies of the trabeculectomy specimens by the light and transmission electron microscopy demonstrated that pigment granules or/and pseudo-exfoliation materials played an important role in obstructing the outflow tract of aqueous humor. In addition, we also discuss the diagnosis and differential diagnosis of both types of glaucoma.
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Affiliation(s)
- M Yu
- Zhongshan Ophthalmic Center, Sun Yat-sen University of Medical Sciences, Guangzhou, China
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6711
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Tsang VC, Boyer AE, Pilcher JB, Eberhard ML, Reimer CB, Zea-Flores G, Zea-Flores R, Zhou W, Richards FO. Guatemalan human onchocerciasis. I. Systematic analysis of patient populations, nodular antigens, and specific isotypic reactions. J Immunol 1991; 146:3993-4000. [PMID: 2033267] [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] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The population from five Guatemalan plantations in areas endemic for onchocerciasis was surveyed, and 1032 individuals were recruited to participate in our study. From physical examination, past clinical history (5 to 8 yr), laboratory evidence and sample availability, a group of 778 long term residents with confirmed disease status were selected for detailed examination. We were able to identify 268 long term residents of endemic areas who had never been infected, 44 of these are from hyper- and mesoendemic areas. The 44 uninfected individuals from the hyper- and mesoendemic areas, because of their considerable exposure to this disease, were classified as "putatively immune." Intact nodules containing adult worms of Onchocerca volvulus were homogenized in the presence of protease inhibitors and fractionated into particulate and aqueous isotonic soluble antigens. Systematic analysis of these Ag fractions showed considerable amounts of Ig, presumably associated with Ag in the form of immune complexes. Individual specific antibody reactions from all 778 patients to nodule Ag were examined. Reactions to O. volvulus antigens by antibodies from patients with confirmed parasitic infections were almost exclusively restricted to IgG1 and IgG4 isotypes. Antigenic activity appeared to be primarily associated with low molecular mass (14 to 29 kDa) components. Some competitive blocking of antibody activities of other isotypes by IgG1 was observed, most notable was that of IgG3 and IgA. IgG4 and IgM activities were not significantly blocked.
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Affiliation(s)
- V C Tsang
- Parasitic Diseases Branch, Centers for Disease Control, Atlanta, GA 30333
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6712
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Tsang VC, Boyer AE, Pilcher JB, Eberhard ML, Reimer CB, Zea-Flores G, Zea-Flores R, Zhou W, Richards FO. Guatemalan human onchocerciasis. I. Systematic analysis of patient populations, nodular antigens, and specific isotypic reactions. The Journal of Immunology 1991. [DOI: 10.4049/jimmunol.146.11.3993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Abstract
The population from five Guatemalan plantations in areas endemic for onchocerciasis was surveyed, and 1032 individuals were recruited to participate in our study. From physical examination, past clinical history (5 to 8 yr), laboratory evidence and sample availability, a group of 778 long term residents with confirmed disease status were selected for detailed examination. We were able to identify 268 long term residents of endemic areas who had never been infected, 44 of these are from hyper- and mesoendemic areas. The 44 uninfected individuals from the hyper- and mesoendemic areas, because of their considerable exposure to this disease, were classified as "putatively immune." Intact nodules containing adult worms of Onchocerca volvulus were homogenized in the presence of protease inhibitors and fractionated into particulate and aqueous isotonic soluble antigens. Systematic analysis of these Ag fractions showed considerable amounts of Ig, presumably associated with Ag in the form of immune complexes. Individual specific antibody reactions from all 778 patients to nodule Ag were examined. Reactions to O. volvulus antigens by antibodies from patients with confirmed parasitic infections were almost exclusively restricted to IgG1 and IgG4 isotypes. Antigenic activity appeared to be primarily associated with low molecular mass (14 to 29 kDa) components. Some competitive blocking of antibody activities of other isotypes by IgG1 was observed, most notable was that of IgG3 and IgA. IgG4 and IgM activities were not significantly blocked.
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Affiliation(s)
- V C Tsang
- Parasitic Diseases Branch, Centers for Disease Control, Atlanta, GA 30333
| | - A E Boyer
- Parasitic Diseases Branch, Centers for Disease Control, Atlanta, GA 30333
| | - J B Pilcher
- Parasitic Diseases Branch, Centers for Disease Control, Atlanta, GA 30333
| | - M L Eberhard
- Parasitic Diseases Branch, Centers for Disease Control, Atlanta, GA 30333
| | - C B Reimer
- Parasitic Diseases Branch, Centers for Disease Control, Atlanta, GA 30333
| | - G Zea-Flores
- Parasitic Diseases Branch, Centers for Disease Control, Atlanta, GA 30333
| | - R Zea-Flores
- Parasitic Diseases Branch, Centers for Disease Control, Atlanta, GA 30333
| | - W Zhou
- Parasitic Diseases Branch, Centers for Disease Control, Atlanta, GA 30333
| | - F O Richards
- Parasitic Diseases Branch, Centers for Disease Control, Atlanta, GA 30333
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6713
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Zhou W, Paesler MA, Sayers DE. Structural study of evaporated amorphous As4S4 films by x-ray-absorption fine structure. Phys Rev B Condens Matter 1991; 43:11920-11925. [PMID: 9996967 DOI: 10.1103/physrevb.43.11920] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [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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6714
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Wang W, Wang J, Zhao D, Liu H, Zhou W, Chen K. [Comparison of Spatholobus suberectus Dum, Euonymus alatus (Thunb.) Sieb. and Eupolyphaga sinensis Walker on regulation of plasma lipid]. Zhongguo Zhong Yao Za Zhi 1991; 16:299-301, 320. [PMID: 1781900] [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 Spatholobus suberectus (SS) of hexue type, the Euonymus alatus (EA) of huoxue type and the Eupolyphaga sinensis (ES) of poxue type were selected and their influence on plasma lipid in the experimental hyperlipidemia quails was observed. The ES could raise plasma HDL-C/TC ratio and increase LCAT activity. The SS could raise plasma HDL2-C/HDL3-C ratio. The effect of EA on plasma HDL-C/TC, HDL2-C/HDL3-C and LCAT levels was between SS and ES. All the three huoxue huayu Chinese drugs could lower plasma HDL3-C level and slow down the progress of atherosclerosis to a certain degree. The above-mentioned results show that certain orders exist between the action range of huoxue huayu drugs and their effect on regulating plasma lipid.
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Affiliation(s)
- W Wang
- Xiyuan Hospital, China Academy of Traditional Chinese Medicine, Beijing
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6715
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6716
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Pilcher JB, Tsang VC, Zhou W, Black CM, Sidman C. Optimization of binding capacity and specificity of protein G on various solid matrices for immunoglobulins. J Immunol Methods 1991; 136:279-86. [PMID: 1999655 DOI: 10.1016/0022-1759(91)90014-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [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: 12/29/2022]
Abstract
Streptococcal protein G is a more versatile and efficient alternative to staphylococcal protein A in purifying immunoglobin G (IgG) isotypes from various animal species. Optimizations are most dramatic with goat IgG, which binds protein G 55 times better than protein A. Using GammaBind G (a recombinant form of protein G (Genex Corp.)), we optimized binding capacity and specificity for IgG. Protein G was covalently coupled to three different matrices (CNBr-Sepharose, Tresyl-Sepharose, and Affigel-10) and compared with protein A-CNBr-Sepharose. Equal volumes of human, mouse, and goat serum samples were equilibrated into Hepes/NaOH buffers with various ionic strengths (i.e., concentrations of NaCl) and pH values and allowed to bind to affinity columns of proteins G and A. Bound ligands were eluted with 8.0 M urea, 0.05-M Tris/HCl, pH 8.00. Bound fractions were assayed for protein concentration and analyzed by sodium dodecyl sulfate polyacrylamide electrophoresis. The optimal conditions for binding IgG to protein G are 1.0 M NaCl and pH 8.0 for human, mouse, and goat.
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Affiliation(s)
- J B Pilcher
- Division of Parasitic Diseases, Centers for Disease Control, Public Health Service, U.S. Department of Health and Human Services, Atlanta, GA 30333
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6717
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Zhou W, Paesler M, Sayers DE. Structure of germanium-selenium glasses: An x-ray-absorption fine-structure study. Phys Rev B Condens Matter 1991; 43:2315-2321. [PMID: 9997507 DOI: 10.1103/physrevb.43.2315] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.0] [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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6718
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Schügerl K, Brandes L, Dullau T, Holzhauer-Rieger K, Hotop S, Hübner U, Wu X, Zhou W. Fermentation monitoring and control by on-line flow injection and liquid chromatography. Anal Chim Acta 1991. [DOI: 10.1016/0003-2670(91)87012-v] [Citation(s) in RCA: 30] [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: 10/18/2022]
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6719
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Huang L, Zhou W. [The relationship of structure in vivo of low tension glaucoma and myopia]. Yan Ke Xue Bao 1990; 6:58-9, 94. [PMID: 2289575] [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: 12/31/2022]
Abstract
The structure in vivo and incidence of myopia on thirty patients with low tension glaucoma were studied in this paper. Results showed that the incidence of high myopia of patients with low tension glaucoma was higher than normal. All of the mean values of the thickness of lens, the length of vitreous and axis, and the area of optic disc were larger than normal too. These indicate that patients with low tension glaucoma may often be associated with high myopia, and their structure of eye in vivo differs from normal. These may be related to pathogenesis of disease with low tension glaucoma. The relationship of myopia and structure of optic disc with glaucoma were briefly summarized.
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Affiliation(s)
- L Huang
- Zhongshan Ophthalmic Center, Sun Yat-sen University of Medical Sciences, Guangzhou, China
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6720
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6721
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Zhou W, Perry CH, Worlock JM. High-pressure magneto-optical studies of two-dimensional-electron and exciton transitions in GaAs-AlxGa1-xAs quantum-well heterostructures. Phys Rev B Condens Matter 1990; 42:9657-9663. [PMID: 9995205 DOI: 10.1103/physrevb.42.9657] [Citation(s) in RCA: 6] [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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6722
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Zhou W. [Computer study of pathologic factors influencing survival in colorectal carcinoma--a multivariant stepwise discriminant analysis]. Zhonghua Zhong Liu Za Zhi 1990; 12:354-6. [PMID: 2177397] [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: 12/30/2022]
Abstract
Five quantitative pathologic parameters and three clinicopathologic parameters in 80 colorectal carcinoma patients with different prognosis were studied with a multivariant stepwise discriminant analysis on computer. The results showed that DNA index (DI), nucleocytoplasmic ratio (NCR), histologic grade and Dukes' stage were significant factors influencing the survival. With these factors, a 4-variable Fisher's discriminant function was established, which could correctly identify 81.25% and 83.75% of the predicted cases (Jacknife Procedure and Reclassification) Sensitivity of the two methods was 87.80%. The results indicate that the multivariant stepwise discriminant analysis on quantitative pathologic parameters combined with clinicopathologic parameters is of value in predicting prognosis of colorectal carcinoma patients.
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Affiliation(s)
- W Zhou
- People's Hospital, Beijing Medical College
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6723
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Zhou W, Porch A, Van Damme I, Jefferson D, Liang W, Edwards P. A study of the structural series in the TlCaBaCuO superconducting system. J SOLID STATE CHEM 1990. [DOI: 10.1016/0022-4596(90)90215-j] [Citation(s) in RCA: 5] [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: 11/24/2022]
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6724
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Zhou W. [Pharmacognostical study on polyporus]. Zhongguo Zhong Yao Za Zhi 1990; 15:459-61, 510. [PMID: 2093316] [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] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- W Zhou
- Shaanxi Province, Xian Municipal Institute for Drug Control
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6725
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Abstract
LHRH (chicken II luteinizing hormone-releasing hormone) partially reduces calcium currents and slows the activation kinetics of part of the remaining current in frog sympathetic neurons. The effects of LHRH are mimicked by intracellular dialysis with GTP-gamma-S. A strong depolarization can temporarily reverse the effects of LHRH or GTP-gamma-S: activation kinetics return to normal, and the amplitude of the current is increased (facilitation). Facilitation develops rapidly (tau = 4-6 ms at greater than +30 mV) and decays more slowly (t 1/2 = 60 ms at -80 mV). Tail currents in LHRH are smaller and faster than in the control, and these effects are partially reversed by facilitation. These results can be explained by a model in which a fraction of the channels is shifted into a "reluctant" gating mode, where opening requires stronger depolarization. If this mechanism is at the root of presynaptic inhibition, our results predict that inhibition of transmitter release would be overcome during bursts of high frequency activity.
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Affiliation(s)
- K S Elmslie
- Department of Physiology and Biophysics, Case Western Reserve University, Cleveland, Ohio 44106
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6726
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Abstract
The correlations of essential element Se between human hair and kidney-cortex, liver, and lung from the same subjects were investigated by instrumental neutron activation analysis, using the reaction 76Se (n, gamma) 77mSe, for 24 Chinese autopsies. The concentration of Se is higher in kidney-cortex (2.04-5.36 mg/kg) than in liver (0.73-2.29), lung (0.50-1.85), and hair (0.37-1.43). It is important to know that there are significant relationships of Se concentration between hair and the other three internal organs. The correlation coefficient by linear regression analysis are 0.639, 0.570, and 0.635 for liver, lung, and kidney-cortex, respectively; and the P values are all less than 0.01 for the three tissues.
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Affiliation(s)
- Y D Cheng
- Shanghai Institute of Nuclear Research, People's Republic of China
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6727
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Peng T, Wu L, Zhou W. Retinitis pigmentosa associated with glaucoma--clinical analysis. Yan Ke Xue Bao 1990; 6:17-9. [PMID: 2101353] [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: 12/30/2022]
Abstract
A clinical analysis of Retinitis Pigmentosa (RP) was made in 2,789 eyes of 1,400 patients seen over a 5 year period (1983-1987), 64 eyes of 32 cases (2.3%) of RP associated with glaucoma were investigated. Of these 32 cases, the angle closure glaucoma was much more than the open angle glaucoma (30/2). More than half of the 32 cases were without cupping of disk, 5 cases did not have the glaucomatous damage to disk in spite of persistent elevated intraocular pressure for 0.5-5 yrs under the maximum medical therapy. 31 cases (97%) had subnormal blood pressure compared with the normal blood pressure value in different age groups. Histopathologic changes of the trabecular meshwork (TM) of 14 eyes showed a little bit more pigment cells in the TM than normal subjects, no typical features that would obstruct the outflow channels.
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Affiliation(s)
- T Peng
- Zhongshan Ophthalmic Centre, Sun Yat-san University of Medical Sciences, Guangzhou, China
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6728
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6729
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Li YG, Liu YS, Miao FM, Liu XL, Cao JH, Zhou W, Wen MX. Synthesis and Stereochemistry of α-Aryl-β-Nitroalkylphosphinate. PHOSPHORUS SULFUR 1990. [DOI: 10.1080/10426509008038906] [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: 10/23/2022]
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6730
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Tang S, Deng S, Zhou W, Li S. [Pancreatic glucagon receptor radioassay with liver cell plasma membrane in normal and streptozotocin-induced diabetic rats]. Hua Xi Yi Ke Da Xue Xue Bao 1990; 21:34-8. [PMID: 2163972] [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: 12/30/2022]
Abstract
Pancreatic glucagon receptor radioassay has been developed with rat liver cell plasma membrane prepared with sucrose gradient centrifugation. 125I-glucagon was prepared in this laboratory and the separation of B/F was done by low speed centrifugation with addition of PEG (W/V, 20%) and normal human serum. The specific binding of 125I-glucagon was 25%-35% and nonspecific binding was less than 5%. Reproducibility within and between- assay was 6.83% and 8.40% (CV%), respectively. Binding characteristics of glucagon receptor of normal and streptozotocin-induced diabetic rats were determined by using two methods, receptor dilution and conventional competitive binding assay. The results showed that there were no marked differences concerning high and low binding affinities between normal and diabetic rats, but the concentration of binding sites for both high and low affinity receptors was significantly higher for diabetic rats than normal rats. The possible mechanisms for the above results have been discussed.
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6731
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Holzhauer-Rieger K, Zhou W, Schügerl K. On-line high-performance liquid chromatography for the determination of cephalosporin C and by-products in complex fermentation broths. J Chromatogr A 1990; 499:609-15. [PMID: 2324218 DOI: 10.1016/s0021-9673(00)97005-5] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.1] [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: 12/31/2022]
Abstract
A fully automated high-performance liquid chromatographic system was developed for optimization of cephalosporin C production. Using a simple, isocratic, reversed-phase method, cephalosporin C, deacetylcephalosporin C, deacetoxycephalosporin C, penicillin N, methionine and its decomposition product 2-hydroxy-4-methylmercaptobutyric acid were determined. The method worked reliably for 250 h and supplied information on the influence of many parameters of the process.
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6732
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Abstract
The effect of Danshen (Radix salviae miltiorrhizae) on mechanical activity and coronary flow rate of isolated rat hearts was examined to assess the ability of Danshen to protect the myocardium against the effects of ischemia and reperfusion. After 20 min of control perfusion, in the presence or absence of Danshen, the hearts were made totally ischemic for 30 min and then reperfused for 30 min. Danshen had a negative inotropic effect and caused an increase of coronary flow rate. During post-ischemic reperfusion recovery of left ventricular developed pressure in the Danshen-treated hearts was significantly better and contracture was significantly less than in the untreated hearts. The results indicate that Danshen protects the heart against some of the deleterious effects of ischemia and reperfusion.
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Affiliation(s)
- W Zhou
- Department of Cardiology, University Hospital, Utrecht, The Netherlands
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6733
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Brand JA, Tsang VC, Zhou W, Shukla SB. Comparison of particulate 3,3',5,5'-tetramethylbenzidine and 3,3'-diaminobenzidine as chromogenic substrates for immunoblot. Biotechniques 1990; 8:58-60. [PMID: 2322454] [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: 12/31/2022] Open
Abstract
In horseradish peroxidase (EC: 1.11.1.7)-dependent immunoblot assays, particulate 3,3',5,5'-tetramethylbenzidine (TMB) is shown to be a more efficient immunoblot substrate than the standard substrate 3,3'-diaminobenzidine (DAB), because TMB is easily prepared, stable, and less carcinogenic than is DAB. Assays of antibody in a serially diluted human immunodeficiency virus (HIV) control serum (CDC reference CAT# VS2151) have the same sensitivity limits with both DAB and TMB (1:312,500). Complete, working substrate solutions of H2O2/TMB/enhancer and of H2O2/DAB were stored at room temperatures and at 48 degrees C respectively. Periodic tests showed the TMB substrate system to be functional after four weeks at 48 degrees C and after eight weeks at room temperature, while the DAB system was functional after one week at 48 degrees C and after four weeks at room temperature. The stability, safety, and convenience of the commercially available TMB kits make this substrate ideal for immunoblot tests.
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6734
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Zhou W, Qu L, Zhang Q, Wang D. Interaction and charge transfer in the iron nitride Fe4N. Phys Rev B Condens Matter 1989; 40:6393-6397. [PMID: 9992713 DOI: 10.1103/physrevb.40.6393] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [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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6735
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Zhou W, Kirkland AI, Mackay KD, Armstrong AR, Harrison MR, Jefferson DA, Liang WY, Edwards PP. High Resolution Electron Microscopy of the High-Tc superconductor Bi2+xSr2Ca1−xCu2O8+δ. Angew Chem Int Ed Engl 1989. [DOI: 10.1002/ange.19891010653] [Citation(s) in RCA: 3] [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: 11/09/2022]
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6736
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Zhou W, Kirkland AI, Mackay KD, Armstrong AR, Harrison MR, Jefferson DA, Liang WY, Edwards PP. High Resolution Electron Microscopy of the High-Tc Superconductor Bi2+xSr2Ca1−xCu2O8+δ. ACTA ACUST UNITED AC 1989. [DOI: 10.1002/anie.198908101] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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6737
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Zhou W. [Measurement of the anterior chamber depth with the slitlamp and the keratometer]. Zhonghua Yan Ke Za Zhi 1989; 25:112-4. [PMID: 2507253] [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
A simple and accurate formula for the measurement of the anterior chamber depth with keratometer and slitlamp is described. The calculation takes into consideration the curvature of the anterior corneal surface and the refractive index of the aqueous. The method was tested with a model of anterior chamber double-blindly and proved accurate and reliable. The average anterior chamber depth of 50 patients (100 eyes) measured by this method was 2.97 +/- 0.22 mm.
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6738
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Chadwick AV, Zhou W, Thomas JM. A New Oxygen Sensor Based on the Thermoelectric Power of Solid Solutions of Nb2O5 and Bi2O3. ACTA ACUST UNITED AC 1989. [DOI: 10.1002/anie.198900751] [Citation(s) in RCA: 7] [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: 11/06/2022]
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6739
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Chadwick AV, Zhou W, Thomas JM. Die Thermokraft fester Lösungen von Nb2O5 in Bi2O3 als Grundlage für einen neuen Sauerstoffsensor. Angew Chem Int Ed Engl 1989. [DOI: 10.1002/ange.19891010117] [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]
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6740
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Wang HZ, Lu SH, Shen WX, Sun ZD, Zhou W, Wu YF, Zhou MR. Effect of A-nor steroids and oestradiol on progesterone production by human luteal cells. J Reprod Fertil 1988; 83:647-53. [PMID: 3411556 DOI: 10.1530/jrf.0.0830647] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Cell suspensions were prepared from human corpora lutea obtained during the mid-luteal phase. Progesterone production was assessed after short-term incubation of luteal cell suspensions. Luteal cells were very sensitive to hCG, the concentration required for 50% maximum response being 0.01 i.u./ml, and the response was 5 times higher than the basal production. Oestradiol (1-100 microM) induced a significant dose-related decrease in both basal and hCG-stimulated progesterone production. The A-nor steroidal compounds anordrin and AF-45 reduced hCG-stimulated progesterone production only at the high concentration of 100 microM. The ED50 values were approximately 3 microM, 75 microM and 100 microM for oestradiol, AF-45 and anordrin respectively. Anordrin showed no significant effects on basal progesterone production. In addition, oestradiol markedly inhibited the activity of 3 beta-hydroxysteroid dehydrogenase in luteal cells, expressed by the conversion of pregnenolone to progesterone, but the inhibitory effects of anordrin and AF-45 were negligible or relatively low. The effects of anordrin and AF-45 were different from those of oestradiol on progesterone production by human luteal cells in vitro, indicating that neither substance is likely to be a useful luteolytic agent in women.
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Affiliation(s)
- H Z Wang
- Shanghai Institute of Planned Parenthood Research, China
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6741
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Jiang WZ, Zhou W, Zhao YG, Li YM, Zheng GC, Meng WC, Zou BZ. Treatment of discogenic back and leg pain based on differentiation of symptom-complex according to traditional Chinese medicine. J TRADIT CHIN MED 1986; 6:267-72. [PMID: 2955173] [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: 01/03/2023]
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6742
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Gao R, Li D, Xun J, Zhou W, Li J, Wang J, Liu C, Li X, Shen W, Qiao H, Stupack DG, Luo N. CD44ICD promotes breast cancer stemness via PFKFB4-mediated glucose metabolism. Endocrinology 1983; 8:6248-6262. [PMID: 30613295 PMCID: PMC6299690 DOI: 10.7150/thno.28721] [Citation(s) in RCA: 63] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 10/20/2018] [Indexed: 12/20/2022]
Abstract
CD44 is a single-pass cell surface glycoprotein that is distinguished as the first molecule used to identify cancer stem cells in solid tumors based on its expression. In this regard, the CD44high cell population demonstrates not only the ability to regenerate a heterogeneous tumor, but also the ability to self-regenerate when transplanted into immune-deficient mice. However, the exact role of CD44 in cancer stem cells remains unclear in part because CD44 exists in various isoforms due to alternative splicing. Methods: Gain- and loss-of-function methods in different models were used to investigate the effects of CD44 on breast cancer stemness. Cancer stemness was analyzed by detecting SOX2, OCT4 and NANOG expression, ALDH activity, side population (SP) and sphere formation. Glucose consumption, lactate secretion and reactive oxygen species (ROS) levels were detected to assess glycolysis. Western blot, immunohistochemical staining, ELISA and TCGA dataset analysis were performed to determine the association of CD44ICD and PFKFB4 with clinical cases. A PFKFB4 inhibitor, 5MPN, was used in a xenograft model to inhibit breast cancer development. Results: In this report, we found that the shortest CD44 isoform (CD44s) inhibits breast cancer stemness, whereas the cleaved product of CD44 (CD44ICD) promotes breast cancer stemness. Furthermore, CD44ICD interacts with CREB and binds to the promoter region of PFKFB4, thereby regulating PFKFB4 transcription and expression. The resultant PFKFB4 expression facilitates the glycolysis pathway (vis-à-vis oxidative phosphorylation) and promotes stemness of breast cancer. In addition, we found that CD44ICD and PFKFB4 expressions are generally up-regulated in the tumor portion of breast cancer patient samples. Most importantly, we found that 5MPN (a selective inhibitor of PFKFB4) suppresses CD44ICD-induced tumor development. Conclusion: CD44ICD promotes breast cancer stemness via PFKFB4-mediated glycolysis, and therapies that target PFKFB4 (e.g., 5MPN therapy) may lead to improved outcomes for cancer patients.
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