1601
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Yang W, Jiang T, Acosta D, Davis PJ. Production of a toxic, novel mammalian metabolite of N-methylcarbazole predicted by a fungal cell model of mammalian metabolism. Toxicol Lett 1992; 60:307-14. [PMID: 1595089 DOI: 10.1016/0378-4274(92)90289-v] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [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: 12/27/2022]
Abstract
The formation of N-hydroxymethylcarbazole (NHMC), carbazole, 1-hydroxy-N-methylcarbazole, 2-hydroxy-N-methylcarbazole, and 3-hydroxy-N-methylcarbazole as products of mammalian liver microsomal metabolism of N-methylcarbazole (NMC) has been documented by several investigators. In previous studies in our laboratory, the fungus Cunninghamella echinulata (ATCC 9244) produced two new metabolites, 3-hydroxy-N-hydroxymethylcarbazole (3-OH-NHMC), and 3-hydroxycarbazole (3-OH-carbazole), in addition to the known mammalian metabolites, NHMC and carbazole. One of the two novel metabolites isolated from the microbial models, 3-OH-NHMC, was also identified and characterized in rat liver microsomes by analytical (HPLC) and spectral (UV and NMR) comparisons with a reference standard. The two metabolites, 3-OH-NHMC and 3-OH-carbazole, were shown to be cytotoxic to cultured rat hepatocytes as assessed by lactate dehydrogenase (LDH) leakage and neutral red (NR) uptake. These studies demonstrate the prospective potential of microbial models for predicting the formation of metabolites from drugs and other xenobiotics in mammalian systems.
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Affiliation(s)
- W Yang
- Division of Medicinal Chemistry, College of Pharmacy, University of Texas, Austin 78712
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1602
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Dobkowski J, Grabowski ZR, Waluk J, Kühnle W, Rettig W, Rullière C, Yang W, Adamus J, Gebicki J. Excited state relaxation processes in the case of some acetophenone derivatives. J CHEM SCI 1992. [DOI: 10.1007/bf02863359] [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: 10/19/2022]
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1603
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Lippe WR, Fuhrmann DS, Yang W, Rubel EW. Aberrant projection induced by otocyst removal maintains normal tonotopic organization in the chick cochlear nucleus. J Neurosci 1992; 12:962-9. [PMID: 1312140 PMCID: PMC6576066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Nucleus magnocellularis (NM), a second-order nucleus in the chick auditory system, is topographically and tonotopically organized. The basilar papilla (cochlea) projects onto the ipsilateral NM via the auditory nerve. The anteromedial region of NM is innervated by the proximal end of the basilar papilla and responds to high-frequency sounds; more posterolateral regions receive input from more distal locations along the papilla and respond to progressively lower frequencies. NM projects exclusively to the third-order neurons of nucleus laminaris (NL). Otocyst removal prevents the formation of the ipsilateral cochlea and cochlear nerve and results in the development of an aberrant functional projection from the contralateral NM to the "deafferented" NM on the operated side of the brain (Jackson and Parks, 1988). In the present experiment, the otocyst was removed unilaterally and the tonotopic organization of the deafferented NM was physiologically mapped at 17-18 d of embryonic age (E17-E18). Quantitative analyses revealed that the frequency organization of the deafferented NM is almost identical to that in normal embryos. Progressively higher characteristic frequencies were recorded at successively more anterior and more medial locations in the nucleus, and the orientation of the tonotopic axis was indistinguishable from normal. Furthermore, the correlation between characteristic frequency and anatomical location is comparable in the deafferented (r = 0.91) and normal (r = 0.87) NM. The only noticeable discrepancy is that characteristic frequencies in NM on both sides of the brain of operated embryos are higher than the frequencies observed previously at comparable regions of the nucleus in unoperated controls.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- W R Lippe
- Department of Otolaryngology, University of Washington School of Medicine, Seattle 98195
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1604
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Leggatt GR, Yang W, McManus DP. Serological evaluation of the 12 kDa subunit of antigen B in Echinococcus granulosus cyst fluid by immunoblot analysis. Trans R Soc Trop Med Hyg 1992; 86:189-92. [PMID: 1440787 DOI: 10.1016/0035-9203(92)90566-u] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.5] [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: 12/27/2022] Open
Abstract
This study evaluated the 12 kDa (smallest) subunit of Echinococcus granulosus antigen B as a diagnostic molecule. Using immunoblotting, 90.9% of cystic hydatid patients, 40% of alveolar hydatid patients and 5.5% of cysticercosis patients showed sero-reactivity to this subunit. Human antibody response to the 12 kDa molecule appeared independent of factors such as parasite strain or host population responsiveness. The majority of infection sera, and some normal human controls, also recognized the 38 kDa subunit of antigen 5.
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Affiliation(s)
- G R Leggatt
- Tropical Health Program, Queensland Institute of Medical Research, Bancroft Centre, Brisbane, Australia
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1605
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Bédard PM, Del Carpio J, Drouin MA, Yang W, Hébert J, Lavoie A, Prévost M, Turenne Y, PetitClerc C, Lorber R. Onset of action of loratadine and placebo and other efficacy variables in patients with seasonal allergic rhinitis. Clin Ther 1992; 14:268-75. [PMID: 1351796] [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: 03/25/2023]
Abstract
In a double-blind study, 185 patients with seasonal allergic rhinitis were randomly assigned to receive 10 mg of loratadine or placebo once daily for three days. On day 1 of treatment, the onset of relief of symptoms within 30 minutes of drug administration was reported by 13% of the loratadine-treated patients and by 4% of the placebo patients (P less than 0.05). At two hours after drug administration, 65% of the loratadine-treated patients and 48% of the placebo patients reported symptom relief. On day 3, the loratadine-treated patients reported a significantly greater relief of symptoms, and according to both physician and patient evaluations, the treatment response was significantly superior in the loratadine-treated than in the placebo patients. The incidence of sedation was 2% in the loratadine group and 1% in the placebo group.
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1606
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Yang SN, Yang W, Tang YH, Wang S. Cardiovascular effects of intracerebral injection of neuropeptide Y in rats. Zhongguo Yao Li Xue Bao 1992; 13:116-8. [PMID: 1598826] [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: 12/27/2022]
Abstract
Cardiovascular effects of microinjection of neuropeptide Y (NPY) (25, 50, and 100 pmol/site) into field CA3 of hippocampus (CA3), lateral septal nuclei (LSN) and substantia nigra (SN) were investigated in urethane-anesthetized rats. NPY administered into CA3 produced a dose-dependent hypotension and bradycardia. Maximal changes of mean arterial blood pressure (MAP) were -1.5 +/- 0.7, -2.0 +/- 0.4, and -4.2 +/- 1.6 kPa, respectively; maximal changes of heart rate (HR) were -7 +/- 14, -23 +/- 24, and -64 +/- 50 bpm, respectively. NPY microinjection into LSN produced a dose-dependent increase in MAP (0.9 +/- 0.8, 1.3 +/- 0.5, and 3.1 +/- 0.5 kPa, respectively) and a prominent increase in HR (14 +/- 15, 41 +/- 28, and 42 +/- 31 bpm, respectively), but the tachycardia was not dose-dependent. NPY applied into SN elicited a dose-dependent decrease in MAP (-1.0 +/- 0.5, -2.2 +/- 0.9, and -4.3 +/- 2.0 kPa, respectively), but no statistically significant change in HR. The results showed that exogenously applied NPY has distinct cardiovascular effects in CA3, LSN, and SN.
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Affiliation(s)
- S N Yang
- Department of Physiology, Norman Bethune University of Medical Sciences, Changchun, China
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1607
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Gross W, Yang W, Boss WF. Release of carrot plasma membrane-associated phosphatidylinositol kinase by phospholipase A2 and activation by a 70 kDa protein. Biochim Biophys Acta 1992; 1134:73-80. [PMID: 1311960 DOI: 10.1016/0167-4889(92)90029-b] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Plasma membranes were isolated from carrot (Daucus carota L.) cells grown in suspension culture and treated with phospholipase A2 from snake or bee venom for 10 min. As a result of this treatment, phosphatidylinositol kinase activity was recovered in the soluble fraction. There was no detectable diacylglycerol kinase or phosphatidylinositol monophosphate kinase activity released from the membranes after the phospholipase A2 treatment. Treating the plasma membranes with phospholipase C or D did not release PI kinase activity. The phospholipase A2-released PI kinase was activated over 2-fold by a heat stable, soluble 70 kDa protein. The partially purified 70 kDa activator increases the Vmax but does not affect the Km of the phospholipase A2-released PI kinase.
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Affiliation(s)
- W Gross
- Botany Department, North Carolina State University, Raleigh 27695
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1608
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Yang W, Davis PJ. Microbial models of mammalian metabolism. Biotransformations of N-methylcarbazole using the fungus Cunninghamella echinulata. Drug Metab Dispos 1992; 20:38-46. [PMID: 1346994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/25/2023] Open
Abstract
The fungal metabolism of N-methylcarbazole (NMC) was investigated during the development of microbial models of mammalian metabolism. NMC was metabolized by the fungus Cunninghamella echinulata (ATCC 9244) to generate four metabolites: carbazole, N-hydroxymethylcarbazole (NHMC), 3-hydroxycarbazole, and 3-hydroxy-NHMC. Carbazole and NHMC are two major metabolites previously identified in mammalian systems, while 3-hydroxycarbazole and 3-hydroxy-NHMC have not been previously reported as metabolites of NMC. Structural identification of the four metabolites was based upon spectral (UV, MS, and NMR) and chromatographic (TLC and HPLC) comparisons with synthetic standards. These studies demonstrate that C. echinulata catalyzes the two principal biotransformations observed in mammalian systems with NMC: aliphatic hydroxylation to yield the (relatively) stable carbinolamine NHMC (with slow decomposition to the N-dealkylated product, carbazole) and aromatic hydroxylation in the 3-position.
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Affiliation(s)
- W Yang
- Division of Medicinal and Natural Products Chemistry, College of Pharmacy, University of Texas, Austin 78712
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1609
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Abstract
The recent cloning of three types of 5-hydroxytryptamine (5-HT, serotonin) receptors substantiates radioligand-based definitions of 5-HT receptors, and provides a framework in which to understand the function and evolution of the receptors. The primary sequences determined by molecular cloning of the 5-HT1c, 5-HT1a and 5-HT2 receptors place each of these 5-HT receptor subtypes into the class of G protein-coupled receptors. These receptors all share similar functional and structural features. Each receptor is positioned in the lipid bilayer with seven membrane-spanning domains and corresponding intracellular and extracellular domains. By analogy to the known functional structures of the beta-adrenergic receptor, the binding site of 5-HT is proposed to be in the membrane domains and the intracellular domain is important for G protein interaction. The primary sequences and the second messenger systems of the receptors indicate the 5-HT2 and 5-HT1c receptors are closely related, whereas the 5-HT1a receptor is more distantly related to the 5-HT2 and 5-HT1c receptors.
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Affiliation(s)
- J C Shih
- Department of Molecular Pharmacology and Toxicology, School of Pharmacy, University of Southern California, Los Angeles 90033
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1610
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Yang W. Direct calculation of electron density in density-functional theory: Implementation for benzene and a tetrapeptide. Phys Rev A 1991; 44:7823-7826. [PMID: 9905920 DOI: 10.1103/physreva.44.7823] [Citation(s) in RCA: 84] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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1611
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Wakasugi M, Yang W, Jin WG, Horiguchi T. Direct observation of the Delta J=2 forbidden transition in Nd I induced by the second-order hyperfine perturbation. Phys Rev A 1991; 44:6115-6118. [PMID: 9906676 DOI: 10.1103/physreva.44.6115] [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: 05/22/2023]
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1612
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Yang W. [A brief account of event-related potentials]. Zhonghua Shen Jing Jing Shen Ke Za Zhi 1991; 24:309-12. [PMID: 1752187] [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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1613
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Yang W, Tabata M, Kobayashi S, Yokota K, Shimizu A. Synthesis of Ultra-High-Molecular-Weight Aromatic Polyacetylenes with [Rh(norbornadiene)Cl]2-Triethylamine and Solvent-Induced Crystallization of the Obtained Amorphous Polyacetylenes. Polym J 1991. [DOI: 10.1295/polymj.23.1135] [Citation(s) in RCA: 105] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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1614
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Rorat E, Yang W, DeLaTorre R. Fine needle aspiration cytology of parapharyngeal meningioma. Acta Cytol 1991; 35:497-500. [PMID: 1927188] [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: 12/29/2022]
Abstract
A unique case of parapharyngeal meningioma identified on a tomographic scan and diagnosed preoperatively by fine needle aspiration (FNA) cytology is reported. The FNA smear showed the spindle-shaped cells in concentric whorls and scattered psammoma bodies that are characteristic of meningioma. The FNA diagnosis was subsequently confirmed on the excised specimen. The preoperative cytologic diagnosis was very helpful in planning the surgical removal of the tumor by a team of otolaryngologists and neurosurgeons.
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Affiliation(s)
- E Rorat
- Department of Pathology and Radiology, Beth Israel Medical Center, New York, New York 10003
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1615
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Yang W, Mao W. Nd:YAG laser treatment of congenital persistent pupillary membrane. Yan Ke Xue Bao 1991; 7:120-4. [PMID: 1842363] [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
Five case of severe congenital persistent pupillary membrane were successfully treated with Nd:YAG laser. The patient's age ranged from 6 to 33 years. After operation, they not only improved their visual acuities, but also got a function of round pupil as well as cosmetic effect. The author describes his experience about the choice of laser energy and technical methods used in Nd:YAG laser treatment of persistent pupillary membrane, and discusses the intra- and post-operative complications, too. Finally, the author emphasizes that provided the operator is skillful, and the choice of laser energy used is appropriate, no severe complications will occur. The author believes that treatment of severe congenital persistent pupillary membrane with Nd:YAG laser is a safe more effective method with less complications as compared with the traditional surgical procedures, and recommends to popularize it.
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Affiliation(s)
- W Yang
- Zhongshan Ophthalmic Center, Sun Yat-sen University of Medical Sciences, Guangzhou, China
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1616
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Yang W, Qian Y, Zheng D. [A micromethod for determination of serum zinc and copper concentration in infants aged 1-3 months in Chengdu]. Hua Xi Yi Ke Da Xue Xue Bao 1991; 22:201-3. [PMID: 1786961] [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
A micromethod for the measurement of serum zinc and copper concentration of peripheral blood by wave-oscillopolarography is introduced in this article. The method is superior to the commonly used flame atomic absorption spectrophotometry (AAS) in its simplicity in sampling and operating and in its inexpensiveness. Yet the results are identical with those obtained by ASS, the method is good enough to replace ASS in clinical work, especially in the field of pediatrics. Serum zinc and copper concentrations in 243 infants aged 1-3 months in Chengdu were detected by this method. The data were found to be slowly distributed without age and sex differences. For the infants of 1-3 months in Chengdu, the reference values of serum zinc and copper concentration are 6.69-25.46 mumol/L and 8.70-28.07 mumol/L respectively.
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Affiliation(s)
- W Yang
- Department of Pediatrics, Second Affiliated Hospital
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1617
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1618
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Fuller L, Carreno M, Zheng S, Esquenazi V, Yang W, Miller J. Isolation of anti-OKT3 and anti-(anti-OKT3) from a kidney transplant recipient. Transplant Proc 1991; 23:305-6. [PMID: 1899306] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- L Fuller
- Miami Veterans Administration Medical Center, Florida
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1619
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Abstract
N-Methycarbazole (NMC), a carcinogen and mutagen in tobacco smoke, was converted to two major metabolites by primary cultured rat hepatocytes as measured by high performance liquid chromatography (HPLC): N-hydroxymethylcarbazole (NHMC) and carbazole. These two metabolites had comparable retention times and identical ultraviolet spectra as those of reference standards. Identical retention times and mass spectra were also observed as detected by gas chromatography-mass spectroscopy (GC-MS) for NHMC and its reference standard. The toxicities of NMC and its two metabolites were assessed by lactate dehydrogenase (LDH) leakage and neutral red (NR) uptake. The rank order of cytotoxicity of NMC and its metabolites was found to be: NHMC greater than NMC greater than carbazole. Thus, we conclude that the hydroxylation of NMC to NHMC may represent a toxification step, while the further dealkylation to carbazole is most likely a detoxication process.
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Affiliation(s)
- W Yang
- Department of Medicinal Chemistry, College of Pharmacy, University of Texas, Austin 78712
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1620
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Dolovich J, Anderson M, Chodirker W, Drouin M, Hargreave FE, Hebert J, Knight A, O'Conner M, Small P, Yang W. Fluticasone propionate: a large multicentre trial. Respir Med 1990; 84 Suppl A:31-2. [PMID: 2287794 DOI: 10.1016/s0954-6111(08)80005-4] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- J Dolovich
- Department of Pediatrics, McMaster University Medical Center, Hamilton, Ontario, Canada
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1621
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Abstract
Ribonuclease H digests the RNA strand of duplex RNA.DNA hybrids into oligonucleotides. This activity is indispensable for retroviral infection and is involved in bacterial replication. The ribonuclease H from Escherichia coli is homologous with the retroviral proteins. The crystal structure of the E. coli enzyme reveals a distinctive alpha-beta tertiary fold. Analysis of the molecular model implicates a carboxyl triad in the catalytic mechanism and suggests a likely mode for the binding of RNA.DNA substrates. The structure was determined by the method of multiwavelength anomalous diffraction (MAD) with the use of synchrotron data from a crystal of the recombinant selenomethionyl protein.
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Affiliation(s)
- W Yang
- Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY 10032
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1622
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Yang W, Hendrickson WA, Kalman ET, Crouch RJ. Expression, purification, and crystallization of natural and selenomethionyl recombinant ribonuclease H from Escherichia coli. J Biol Chem 1990; 265:13553-9. [PMID: 2199440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Ribonuclease H (RNase H) from Escherichia coli is an endonuclease that specifically degrades the RNAs of RNA:DNA hybrids. The enzyme is a single polypeptide chain of 155 amino acid residues, of which 4 are methionines. To solve the crystallographic three-dimensional structure of E. coli RNase H by the multi-wavelength anomalous diffraction technique, we have constructed methionine auxotrophic strains of E. coli that overexpress selenomethionyl RNase H. MIC88 yields about 10 mg of selenomethionyl RNase H per liter of culture, which is comparable to the overexpression of the natural recombinant protein. We have purified both proteins to homogeneity and crystallized them isomorphously in the presence of sulfate. These are Type I crystals of space group P2(1)2(1)2(1) with the cell parameters a = 41.8 A, b = 86.4 A, c = 36.4 A, one monomer per asymmetric unit, and approximately 36% (v/v) solvent. Crystals of both proteins diffract to beyond 2-A Bragg spacings and are relatively durable in an x-ray beam. On replacement of sulfate with NaCl, crystals of natural RNase H grow as Type I' (very similar to Type I) at pH between 7.0 and 8.0; at pH 8.8, crystals of Type II are obtained in space group P2(1)2(1)2(1) with a = 44.3 A, b = 87.3 A, and c = 35.7 A. Type II crystals can be converted to Type I by soaking in phosphate buffer. RNase H crystals of Type II have also been reported by Kanaya et al. (Kanaya, S., Kohara, A., Miyakawa, M., Matsuzaki, T., Morikawa, K., and Ikehara, M. (1989) J. Biol. Chem. 264, 11546-11549).
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Affiliation(s)
- W Yang
- Department of Biochemistry and Molecular Biophysics, Columbia University, New York, New York 10032
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1623
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Liu Y, Yang W, Li S. Neodymium: YAG laser therapy in aphakic pupillary block glaucoma and aphakic malignant (ciliovitreal block) glaucoma. Yan Ke Xue Bao 1990; 6:11-6. [PMID: 2101352] [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
Aphakic pupillary block glaucoma and malignant glaucoma (ciliovitreal block) are severe complications of the intracapsular cataract extraction, presenting clinically as elevated intraocular pressure, persistent shallow anterior chamber and severe vitreal hernia. Six eyes (four women and two men) with aphakic pupillary block glaucoma and aphakic malignant glaucoma were resolved by Neodymium: YAG laser iridotomy and hyaloidotomy. The laser therapy resulted in immediate deepening of the anterior chamber and reducing of intraocular pressure. No side effect was observed. Neodymium: YAG laser iridotomy and hyaloidotomy may be more effective and simple than penetrating surgery in such cases.
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Affiliation(s)
- Y Liu
- Zhongshan Ophthalmic Center, Sun Yat-sen University of Medical Sciences, Guangzhou, China
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1624
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Bai Y, Yang W. [Nursing care of rheumatoid arthritis]. Zhonghua Hu Li Za Zhi 1990; 25:169-72. [PMID: 2350826] [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: 12/31/2022]
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1625
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Li M, Zhou J, Fan Y, Li W, Qin L, Yang W. [Analgesic and anti-inflammatory effects and toxicity of houjianxi]. Zhongguo Zhong Yao Za Zhi 1990; 15:235-8, 256. [PMID: 2206377] [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
It is effective for acute and chronic laryngopharyngitis clinically. Houjianxi can raise the pain thresholds during hot-plate test in mice, tail flick test in rats, and writhing test in mice with single dose ig 0.125 to 2.0 g/kg. Houjianxi can also inhibit the swelling of hind paw induced by sc 1% carrageenin 0.1 ml in rats as well as the increased vascular permeability induced by ip 0.7% HAC in mice. Toxic side effects were not observed for Houjianxi ig 48 g/kg x 3 within a day in mice and 1.8 g/kg daily for 90 d in rats.
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Affiliation(s)
- M Li
- Guangxi Institute of Traditional Medical and Pharmaceutical Sciences, Nanning
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1626
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Zhou L, Yang W, Xu Y, Zhu Q, Ma Z, Zhu T, Ge X, Gao J. [Short-term curative effect of cultured Cordyceps sinensis (Berk.) Sacc. Mycelia in chronic hepatitis B]. Zhongguo Zhong Yao Za Zhi 1990; 15:53-5, 65. [PMID: 1693509] [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
33 cases of chronic hepatitis B. patients treated with cultured Cordyceps sinensis mycelia have shown that the drug improves the liver function, promotes negative transfer HBsAg, and markedly helps to raise plasma albumin, resist high gamma globulin and to adjust body immunocompetence. It is therefore suggested that cultured Cordyceps sinensis mycelia may be used as a medicine for chronic hepatitis B. patients in adjusting protein metabolism and correcting inversion of albumin and globulin.
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Affiliation(s)
- L Zhou
- Shanxi Liver Diseases Research Co-operation Group
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1627
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Lustbader JW, Birken S, Pileggi NF, Kolks MA, Pollak S, Cuff ME, Yang W, Hendrickson WA, Canfield RE. Crystallization and characterization of human chorionic gonadotropin in chemically deglycosylated and enzymatically desialylated states. Biochemistry 1989; 28:9239-43. [PMID: 2611225 DOI: 10.1021/bi00450a001] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Crystals suitable for X-ray diffraction studies at moderate resolution have been grown from two forms of human chorionic gonadotropin (hCG): HF-treated hCG and neuraminidase-treated hCG. The enzymatically desialylated form of hCG produced crystals that diffract to 2.8 A as compared to the HF-treated hCG crystals that diffract to 3.0 A. Although it was assumed that the high and heterogeneous carbohydrate content of the glycoprotein hormones inhibited their crystallization, this report suggests that it is the negatively charged surface sugars and neither the total carbohydrate content nor its heterogeneity which interferes with crystal formation. Chemical deglycosylation resulted in significantly increased protein degradation during crystal growth. Such peptide bond cleavages were observed to a much lesser extent in the crystals grown from neuraminidase-digested hCG. Sequence analysis of the HF-treated hCG crystals suggested that up to 45% of the molecules within the crystal had an acid-labile peptide bond cleaved. In contrast, the neuraminidase-treated hCG exhibited less than 9% of this type of cleavage. The increase in heterogeneity of the polypeptide chains within both crystals over that existent in the starting proteins was apparently due to changes occurring during crystal growth. The manner in which hCG was treated prior to crystallization was found to be a very important factor in the extent of peptide bond cleavages occurring during crystal growth. HF treatment of glycoproteins may render glycoproteins more susceptible to peptide bond cleavages during crystal growth.
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Affiliation(s)
- J W Lustbader
- Department of Medicine, College of Physicians and Surgeons, Columbia University, New York, New York 10032
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1628
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Affiliation(s)
- P Morassut
- Department of Medicine, University of Ottawa, Ontario, Canada
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1629
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Yang W. Ab initio approach for many-electron systems without invoking orbitals: An integral formulation of density-functional theory. Phys Rev A Gen Phys 1988; 38:5494-5503. [PMID: 9900286 DOI: 10.1103/physreva.38.5494] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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1630
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Yang W. Thermal properties of many-electron systems: An integral formulation of density-functional theory. Phys Rev A Gen Phys 1988; 38:5504-5511. [PMID: 9900287 DOI: 10.1103/physreva.38.5504] [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] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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1631
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Yang W. Dynamic linear response of many-electron systems: An integral formulation of density-functional theory. Phys Rev A Gen Phys 1988; 38:5512-5519. [PMID: 9900288 DOI: 10.1103/physreva.38.5512] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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1632
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Abstract
5-Hydroxytryptamine1A (5-HT1A) receptor proteins were identified by a novel approach in which photoaffinity labeling technique was used in conjunction with affinity column chromatography. 5-HT1A receptors were solubilized from bovine frontal cortical membranes with 0.3% digitonin and 0.1% Nonidet P-40, and bound effectively to 1-[2-(4-aminophenyl)ethyl]-4-(3-trifluoromethylphenyl)piperazine (PAPP)-coupled Affi-Gel 10 in a time-dependent manner. PAPP was shown previously to be a selective ligand for the 5-HT1A receptor. Two protein bands with molecular masses of approximately 55,000 and 38,000 daltons revealed on sodium dodecyl sulfate-polyacrylamide gel electrophoresis were eluted from the affinity column with either 1 mM 5-HT or 1 microM [3H]1-[2-(4-azidophenyl)ethyl]-4-(3-trifluoromethyl-phenyl)piperazine ([3H]p-azido-PAPP). [3H]p-Azido-PAPP is a selective photoaffinity labeling probe for the 5-HT1A receptor. The intensity of these two protein bands and the incorporation of [3H]p-azido-PAPP into these two proteins decreased significantly when the solubilized fraction was preincubated with excess 5-HT or PAPP (saturating all 5-HT1A receptors) prior to affinity column chromatography. These results suggest strongly that these two proteins are related to the 5-HT1A receptor protein. The isoelectric points of the photolabeled 5-HT1A receptor proteins were 6.0 and 6.5.
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Affiliation(s)
- Y Takeuchi
- Division of Biological Sciences, School of Pharmacy, University of Southern California, Los Angeles 90033
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1633
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Anassontzis E, Katsanevas S, Kiritsis E, Kourkoumelis C, Markou A, Resvanis LK, Voulgaris G, Binkley M, Cox B, Enagonio J, Hojvat C, Judd D, Kephart RD, Malhotra PK, Mazur PO, Murphy CT, Turkot F, Wagner RL, Wagoner D, Yang W, Areti H, Conetti S, Lebrun P, Ryan DG, Ryan T, Schappert W, Stairs DG, Akerlof C, Cui X, Kraushaar P, Nitz D, Thun R, Wang L, He M, Zhang NJ. High-mass dimuon production in p-barN and pi -N interactions at 125 GeV/c. Phys Rev D Part Fields 1988; 38:1377-1403. [PMID: 9959285 DOI: 10.1103/physrevd.38.1377] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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1634
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Zeng XP, Yang W, Wang ZG. [Relaxation effect of bovine parathyroid hormone 1-34 on rabbit aorta]. Zhongguo Yao Li Xue Bao 1988; 9:330-3. [PMID: 3195343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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1635
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Katsanevas S, Kourkoumelis C, Markou A, Resvanis LK, Tzamarias S, Voulgaris G, Binkley M, Cox B, Enagonio J, Hojvat C, Judd D, Kephart RD, Malhotra PK, Mazur PO, Murphy CT, Turkot F, Wagner RL, Wagoner DE, Yang W, Areti H, Conetti S, Lebrun P, Ryan D, Ryan T, Schappert W, Stairs DG, Akerlof C, Kraushaar P, Nitz D, Thun R, Mao H. Nuclear-target effects in J/ psi production in 125-GeV/c antiproton and pi - interactions. Phys Rev Lett 1988; 60:2121-2124. [PMID: 10038265 DOI: 10.1103/physrevlett.60.2121] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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1636
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Lee C, Yang W, Parr RG. Development of the Colle-Salvetti correlation-energy formula into a functional of the electron density. Phys Rev B Condens Matter 1988; 37:785-789. [PMID: 9944570 DOI: 10.1103/physrevb.37.785] [Citation(s) in RCA: 67860] [Impact Index Per Article: 1885.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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1637
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Abstract
This paper reports on the development and testing of a new Chinese diagnostic instrument--the Adult Diagnostic Interview Schedule-Present (ADIS-P). This instrument uses a selection of items adapted from DIS and SADS. It is administered within approximately 25 min by a trained clinician using a small portable computer that provides an immediate diagnosis. The instrument was tested on 1,331 patients from six large mental hospitals across the country. The concurrent validity was good: compared to the concensus diagnosis of two senior clinicians (who were blinded to the ADIS-P result), the overall diagnostic accuracy was 83% and the weighted Kappa value was 0.60. The 1 month test-retest reliability was satisfactory (weighted Kappa = 0.55). We conclude that ADIS-P is a convenient, reliable and valid diagnostic instrument.
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Affiliation(s)
- Y Zheng
- Research Center of Psychological Medicine, Hunan Medical College, Changsha, Peoples Republic of China
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1638
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Yang W. Ab initio approach for many-electron systems without invoking orbitals: An integral formulation of density-functional theory. Phys Rev Lett 1987; 59:1569-1572. [PMID: 10035270 DOI: 10.1103/physrevlett.59.1569] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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1639
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1640
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Yang W, Parr RG, Lee C. Various functionals for the kinetic energy density of an atom or molecule. Phys Rev A Gen Phys 1986; 34:4586-4590. [PMID: 9897838 DOI: 10.1103/physreva.34.4586] [Citation(s) in RCA: 67] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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1641
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Rijckenberg M, Sanders C, Yang W. [Integrated treatment of pain in cancer patients. Psychomotor therapy in the hospital]. Tijdschr Ziekenverpl 1986; 39:447-52. [PMID: 3535167] [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: 01/06/2023]
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1642
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Abstract
The concepts of hardness eta = (2E/N2)nu and fukui function f(r) = [rho (r)/N]nu, which have recently been associated with the theory of chemical reactivity in molecules, are extended to the theory of metals. It is shown that at T = 0, 1/eta = g(epsilon F) and f(r) = g(epsilon F, r)/g(epsilon F), where g(epsilon F), and g(epsilon F, r) are the density of states and the local density of states, at the Fermi energy epsilon F. Softness S and local softness s(r) are defined as 1/eta and Sf(r), respectively, and it is shown that (formula; see text) where the averages are over a grand canonical ensemble. It is pointed out that the postulate that f(r) or g(epsilon F, r) determines site selectivity for metals in chemisorption and catalysis is synonymous with the recent argument by Falicov and Somorjai [Falicov, L. M. & Somorjai, G. A. (1985) Proc. Natl. Acad. Sci. USA 82, 2207-2211] that such selectivity is determined by low-energy density fluctuations.
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1643
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Wang ZG, Yang W. [Recent advances in the pharmacology of the calcium channel]. Yao Xue Xue Bao 1985; 20:235-40. [PMID: 2416189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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1644
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Yang W. Analyses and discussions of data from China's 1982 census--a report on the International Seminar on China's 1982 Census. Soc Sci China 1985; 6:33-50. [PMID: 12267786] [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: 05/23/2023]
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1645
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Zou HL, Wei EQ, Yang W, Bian RL. [Effect of verapamil on the action of isoproterenol]. Yao Xue Xue Bao 1985; 20:173-7. [PMID: 2416188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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1646
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Yang W, Gao HY, Wang ZG, Jin YC. [Influence of bovine parathyroid hormone-(1-34) on the contraction of the rat vas deferens and the effect of calcium]. Zhongguo Yao Li Xue Bao 1985; 6:51-5. [PMID: 3158160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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1647
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Abstract
A pair of siblings with clinical symptoms of cyclic vomiting and ketoacidosis were found to have a biochemical triad of normoglycemia, ketoacidosis and elevated levels of alpha-hydroxy- and alpha-aminobutyrate in plasma and urine. Methionine loading studies in both sibs produced prompt rises in plasma methionine and alpha-aminobutyrate levels, with a subsequent increase in urinary alpha-hydroxybutyrate, as well. Leukocytes from both siblings showed normal oxidation of [3-14C]propionate. Increased inorganic sulfate excretion after methionine loading implied an intact transsulfuration pathway in both siblings. On the basis of the studies detailed in this report, we conclude that these siblings suffer from a defect in alpha-ketobutyrate oxidation, a newly described defect of organic acid metabolism.
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1648
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Stanley CA, Hale DE, Coates PM, Hall CL, Corkey BE, Yang W, Kelley RI, Gonzales EL, Williamson JR, Baker L. Medium-chain acyl-CoA dehydrogenase deficiency in children with non-ketotic hypoglycemia and low carnitine levels. Pediatr Res 1983; 17:877-84. [PMID: 6646897 DOI: 10.1203/00006450-198311000-00008] [Citation(s) in RCA: 164] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Three children in two families presented in early childhood with episodes of illness associated with fasting which resembled Reye's syndrome: coma, hypoglycemia, hyperammonemia, and fatty liver. One child died with cerebral edema during an episode. Clinical studies revealed an absence of ketosis on fasting (plasma beta-hydroxybutyrate less than 0.4 mmole/liter) despite elevated levels of free fatty acids (2.6-4.2 mmole/liter) which suggested that hepatic fatty acid oxidation was impaired. Urinary dicarboxylic acids were elevated during illness or fasting. Total carnitine levels were low in plasma (18-25 mumole/liter), liver (200-500 nmole/g), and muscle (500-800 nmole/g); however, treatment with L-carnitine failed to correct the defect in ketogenesis. Studies on ketone production from fatty acid substrates by liver tissue in vitro showed normal rates from short-chain fatty acids, but very low rates from all medium and long-chain fatty acid substrates. These results suggested that the defect was in the mid-portion of the intramitochondrial beta-oxidation pathway at the medium-chain acyl-CoA dehydrogenase step. A new assay for the electron transfer flavoprotein-linked acyl-CoA dehydrogenases was used to test this hypothesis. This assay follows the decrease in electron transfer flavoprotein fluorescence as it is reduced by acyl-CoA-acyl-CoA dehydrogenase complex. Results with octanoyl-CoA as substrate indicated that patients had less than 2.5% normal activity of medium-chain acyl-CoA dehydrogenase. The activities of short-chain and isovaleryl acyl-CoA dehydrogenases were normal; the activity of long-chain acyl-CoA dehydrogenase was one-third normal. These results define a previously unrecognized inherited metabolic disorder of fatty acid oxidation due to deficiency of medium-chain acyl-CoA dehydrogenase.
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1649
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Yang W, Wang ZG. [Experimental and clinical studies of parathyroid hormone]. Zhonghua Yi Xue Za Zhi 1983; 63:249-51. [PMID: 6413026] [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: 01/20/2023]
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1650
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