6851
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Martin K, Kong TH, Renehan W, Schurr A, Dong W, Zhang X, Fogel R. Identification and function of brain stem neurons regulating rat ileal water absorption. Am J Physiol 1989; 257:G266-73. [PMID: 2475033 DOI: 10.1152/ajpgi.1989.257.2.g266] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The central nervous system (CNS) regions regulating ileal water and ion absorption are unknown. We determined 1) the CNS origin of brain stem neurons that directly innervate the rat ileum, and 2) that these neurons influence intestinal water absorption. Horseradish peroxidase (HRP) was injected into the muscle layer of the rat ileum. The brains were examined for HRP reaction product (HRPRP) 3, 5, or 7 days later. Only cell bodies of the dorsal motor nucleus of the vagus (DMNV) were labeled. Unilateral cervical vagotomy prevented deposition in the ipsilateral DMNV. To determine whether the DMNV regulates ileal water absorption, electrical and chemical stimulation (30 microA, 4 Hz, 0.2 ms, and 300 pmol L-glutamate every 5 min, respectively) were used. Both the DMNV and the adjacent nucleus tractus solitarius (NTS) were stimulated, causing a reduction in water absorption. Bilateral vagotomy prevented the effect of bilateral electrical stimulation, but unilateral vagotomy did not prevent the decrease due to ipsilateral stimulation. These studies show that 1) the DMNV innervates the ileum, and 2) alteration of vagal efferent activity by stimulation of the DMNV and NTS reduces ileal water absorption.
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Affiliation(s)
- K Martin
- Department of Medicine, University of Louisville, Kentucky 40292
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6852
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Zhang X, Ma XJ, Zhang TH. [Plasma level of cyclic nucleotides in patients with congestive heart failure and their clinical significance]. Zhonghua Xin Xue Guan Bing Za Zhi 1989; 17:213-5, 253-4. [PMID: 2560704] [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
Plasma concentrations of cyclic nucleotides were determined by radioimmunoassay in 196 cardiac patients. The results showed that plasma concentrations of cyclic AMP and cyclic GMP increased with the deterioration of cardiac function. Plasma cyclic GMP concentrations were correlated positively to the cardiothoracic ratios (CTR), PEP/LVET, and the intracardiac diameters measured by echocardiography respectively (r = 0.55 r = 0.50, and r = 0.55, P less than 0.001), and were correlated negatively to the left ventricular ejection fractions (LVEF) and LV short axis shortenings (LVSAS) (r = -0.53 and r = -0.50 respectively, P less than 0.001). There were only weak correlations between plasma cyclic AMP concentrations and CTR, PEP/LVET ratios, LVEF and LVSAS (r = 0.35, r = 0.38, r = 0.28, and r = -0.31, respectively, P less than 0.01). The correlations between plasma cyclic GMP concentrations and mean pulmonary artery pressures (r = 0.48, P less than 0.05) and mean left atrial pressures (r = 0.55, P less than 0.01) were also significant. In patients who had received cardioversion and valve replacement, plasma cyclic GMP concentrations decreased significantly. Thus the plasma concentrations of cyclic nucleotides could be used as a useful parameter in evaluation of cardiac function and therapeutic effect.
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6853
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Gonis A, Zhang X, Nicholson DM. Multiple-scattering Green-function method for space-filling cell potentials. Phys Rev B Condens Matter 1989; 40:947-965. [PMID: 9991914 DOI: 10.1103/physrevb.40.947] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [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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6854
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Zhang X, Segawa T. Selective blockade of dopamine D-1 receptor by SCH 23390 affects dopamine agonist binding to 3H-spiperone labeled D-2 receptors in rat striatum. Jpn J Pharmacol 1989; 50:333-45. [PMID: 2569545 DOI: 10.1254/jjp.50.333] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
This study investigated the effects of selective blockade of dopamine D-1 receptors by SCH 23390 and selective stimulation of the receptors by SKF 38393 on the binding characteristics of 3H-spiperone labeled D-2 receptors in rat striatum. Selective blockade of D-1 receptors by 50 nM SCH 23390 significantly decreased the affinity of dopamine agonist for 3H-spiperone labeled D-2 receptors, but did not influence dopamine antagonist binding to D-2 receptors. Selective stimulation of D-1 receptors by SKF 38393 (100 nM) did not affect either dopamine agonist or antagonist binding to D-2 receptors. The characteristics of the effect of SCH 23390 on dopamine agonist binding to D-2 receptors was similar to those of GTP, but different from those of sodium ion. This effect could not be due to a direct modification of D-2 receptors by SCH 23390. Pertussis toxin (IAP) treatment significantly decreased the affinity of dopamine agonist for D-2 receptors and reduced the abilities of both SCH 23390 and GTP to decrease the affinity of dopamine agonist for D-2 receptors. These results suggest, therefore, putative interregulatory mechanism between dopamine D-1 and D-2 receptors and the possible involvement of a pertussis toxin sensitive protein in this mechanism.
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Affiliation(s)
- X Zhang
- Department of Pharmacology, Hiroshima University School of Medicine, Japan
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6855
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Shen WF, Gong LS, Zhang JS, Cui LQ, Zhang X, Zheng AF, Tang AR, Yang HJ, Ju LF. Value of angina pectoris after myocardial infarction in predicting extent of coronary artery disease. Chin Med J (Engl) 1989; 102:529-32. [PMID: 2517069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Clinical, hemodynamic, and angiographic data were examined in 53 patients who underwent catheterization within 6 months of documented acute transmural myocardial infarction (MI). The patients were divided into two groups on the basis of presence (23 patients, group I) or absence (30 patients, group II) of angina pectoris 1 month after MI. Group I patients had more severe coronary artery disease and a greater prevalence of multivessel disease than group II patients. Partial preservation of segmental left ventricular wall function in group I was related to the presence of collateral vessels. In patients with single vessel disease, incidence of spontaneous recanalization of the infarct-related artery was more common in group I as compared with those in group II. It is concluded that angina pectoris after MI suggests multivessel disease or infarct-related artery recanalization. Coronary angiography may be advised in these patients in order to select adequate therapeutic interventions and improve prognosis.
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6856
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Zhang X, Armstrong DT. Effects of follicle-stimulating hormone and ovarian steroids during in vitro meiotic maturation on fertilization of rat oocytes. Gamete Res 1989; 23:267-77. [PMID: 2506113 DOI: 10.1002/mrd.1120230304] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The present study examined the effects of gonadotropins and ovarian steroids during in vitro meiotic maturation of rat oocytes on their ability to undergo in vitro fertilization. Fully grown oocytes were isolated from antral follicles of immature rats and cultured as oocyte-cumulus cell complexes (OCC) under conditions in which completion of meiotic maturation occurs spontaneously. They were then exposed to spermatozoa under conditions in which oocytes matured in vivo exhibit high fertilization rates. Compared with oocytes from pregnant mare's serum gonadotropin (PMSG) or follicle-stimulating hormone (FSH)-treated rats, a similar proportion of the oocytes (greater than 80%) from untreated rats underwent germinal vesicle breakdown, but such oocytes had a lower rate of fertilization (70% vs. 20%). The presence of FSH during in vitro maturation restored the fertilization rate for oocytes from untreated rats, while a cytochrome P450 inhibitor, aminoglutethimide phosphate abolished this beneficial effect of FSH. The addition of progesterone during the in vitro maturation period duplicated the beneficial effect of FSH on fertilization rate of oocytes from untreated rats; oestradiol-17 beta was less effective in this regard, and 5 alpha-dihydrotestosterone was ineffective. These findings indicate that FSH and progesterone, although having no apparent effect on nuclear maturation of the oocyte, play an important role during oocyte maturation in enabling normal fertilization to occur.
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Affiliation(s)
- X Zhang
- Department of Obstetrics and Gynaecology, University of Western Ontario, London, Canada
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6857
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Lu G, Young BL, Zhang X, Wan L. New tripreon models with semisimple metacolor groups. Phys Rev D Part Fields 1989; 40:223-230. [PMID: 10011674 DOI: 10.1103/physrevd.40.223] [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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6858
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Klinger K, Zhang X, Rheda F, Gerber P, Decurtins M, Uhlschmid G, Häcki W, Stamm B, Largiadèr F. [Experimental pancreatic duct occlusion with polyurethane]. Helv Chir Acta 1989; 56:189-93. [PMID: 2674061] [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: 01/02/2023]
Abstract
Pancreatic transplantation requires an effective method to manage exocrine secretion. A new technique to eliminate the exocrine function of the pancreas by obstruction of the duct with polyurethane was investigated in terms of function, outcome and morphology. Polyurethane is an alcoholic solution of block copolymers with the property of polymerizing within 5-10 min. In this study the in-situ pancreatic tail model in dogs was utilized, the pancreatic duct was cannulated and injected with 2-3 ml of polyurethane. As a result, complete atrophy and fibrosclerosis of the exocrine tissue was obtained leaving islets well vascularized and functioning for the entire experimental periods. All animals remained normoglycemic and showed normal K-values. Amylase levels were found to be maximally elevated at 24 h and returned to normal within 2 weeks after duct occlusion. Insulin, glucagon and somatostatin levels remained normal. Because of its ability to effect a complete occlusion of the pancreatic ducts with subsequent atrophy of the exocrine gland and without notable disturbance of endocrine function, we feel that polyurethane solution is superior to previously used materials for this purpose.
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6859
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Mulhollan GA, Zhang X, Dunning FB, Walters GK. Role of rediffused primary electrons in secondary-electron ejection from a Cu(100) surface. Phys Rev B Condens Matter 1989; 39:8715-8717. [PMID: 9947587 DOI: 10.1103/physrevb.39.8715] [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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6860
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Zhang X, Gonis A. New, real-space, multiple-scattering-theory method for the determination of electronic structure. Phys Rev Lett 1989; 62:1161-1164. [PMID: 10039592 DOI: 10.1103/physrevlett.62.1161] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [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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6861
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Abstract
Receptors of 12 lectins in 25 cases of human hepatocellular carcinomas (HCC) were histochemically investigated by avidin-biotin-peroxidase complex (ABC) method. Liver tissues of five cirrhotic patients and five normal subjects were used as controls. SJA receptor was absent both in HCC and controls, while LCA and PSA receptors were present in all tissues studied here. Receptors of DBA, PHA, PNA, UEAI and SBA which did not bind to normal, cirrhotic and pericarcinomatous liver tissues had the positive rates of 4%, 44%, 16%, 4% and 12% in HCC, respectively. Four lectins which strongly bound to the non-cancer liver tissues had their receptors in 96% (ConA, WGA, RCAI) and 36% (BSAI) of HCC. The pretreatment of tissue sections with neuraminidase abolished most of WGA receptors and exposed some PNA binding sites. There were many differences in lectin distribution between HCC and noncancer liver tissues. The changes of glycoconjugates in HCC were discussed.
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Affiliation(s)
- S M Zhang
- Institute of Hepatobiliary Surgery, Changhai Hospital, Shanghai, People's Republic of China
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6862
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Abstract
Six cases of oral hyperpigmentation in HIV-infected patients are reported. While in two patients the lesions could be related to systemic clofazimine or ketoconazole therapy, in the other patients the cause remained unknown. Clinically, the pigmentations were characterized by a sudden onset and the appearance of well-defined, brown-black macules in the buccal mucosa, the gingiva, the hard palate, or the lateral borders of the tongue. In one patient, longitudinal hyperpigmented striae were observed on all fingernails and toenails. Histologically, hyperpigmentations associated with systemic medication revealed accumulation of melanin in phagocytes and extracellularly within the connective tissue. In those lesions with unknown cause, melanin was restricted to keratinocytes of the basal cell layer or to extracellular foci in the lamina propria. The clinical and histologic findings, as well as differential diagnosis, are discussed.
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Affiliation(s)
- A Langford
- Abteilung für zahnärztliche Chirurgie/Oralchirurgie Nord, Freie Universität, Berlin, FRG
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6863
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Zhang X, Miller B. Effects of pregnancy and exogenous progesterone on immunosuppressive activity in the uterus and peripheral plasma of the ewe. Anim Reprod Sci 1989. [DOI: 10.1016/0378-4320(89)90057-2] [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: 10/27/2022]
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6864
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Zhang X, Hou FF. [Advances in hemopurification therapy in acute kidney failure]. Zhonghua Yi Xue Za Zhi 1989; 69:176-8. [PMID: 2673489] [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: 01/02/2023]
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6865
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Duperray C, Klein B, Durie BG, Zhang X, Jourdan M, Poncelet P, Favier F, Vincent C, Brochier J, Lenoir G. Phenotypic analysis of human myeloma cell lines. Blood 1989; 73:566-72. [PMID: 2537114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Multiple myeloma (MM) is a B-cell malignancy characterized by the accumulation, primarily in bone marrow, of a clone of plasma cells. The nature of the stem cells feeding the tumoral compartment is still unknown. To investigate this special point, we have studied the phenotypes of nine well-known human myeloma cell lines (HMCLs) and compared them with those of normal lymphoblastoid cell lines (LCLs). Twenty-four clusters of differentiation involved in B lymphopoiesis were investigated using a panel of 65 monoclonal antibodies (MoAbs). For each cluster, the percentage of positive cells and the antigen density were determined, giving rise to a "quantitative phenotype". We thus classified the HMCLs into two different groups: those with cytoplasmic mu chains (c mu+) and those without (c mu-). In the first (c mu+) group, comprising seven cell lines, the HMCLs had a phenotype of pre-B/B cells close to that of Burkitt's lymphoma cell lines. They expressed low densities of surface mu chains, without detectable cytoplasmic or surface light chains. Three of them were infected with the Epstein Barr virus (EBV). These c mu+ HMCLs bore most of the B-cell antigens except CD23. They expressed the CALLA antigen (CD10) and lacked the plasma-cell antigen PCA1. In contrast, LCLs expressed surface light chains, high densities of CD23, low densities of PCA1 antigen, and no CD10 antigen. The c mu- HMCLs had a plasma-cell phenotype, lacking most of the B-cell antigens and expressing high densities of PCA1 antigen.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- C Duperray
- INSERM U291, SANOFI Recherche, Montpellier, France
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6866
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6867
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Klingler K, Zhang X, Menghini T, Metzger U, Largiadèr F. [Effect of blood transfusions on the survival of patients with colorectal cancers]. Helv Chir Acta 1989; 55:685-8. [PMID: 2715032] [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: 01/02/2023]
Abstract
Blood transfusion is reported to cause immunosuppression. An adverse relationship between perioperative blood transfusions and the risk of subsequent recurrence of cancer was reported recently. We reviewed the records of 282 patients and analyzed the interaction between blood tranfusion and the outcome of Dukes stages A, B and C colorectal cancers treated by radical resection during the years 1978-1985. 53 of these patients did not receive any blood transfusions. The actuarial survival analysis (Cutler and Ederer) showed no significant difference for the overall and recurrence-free survival. This study did not support the hypothesis that blood transfusions had an adverse effect on survival of patients with colorectal cancer.
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6868
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Zhang X, Miller BG, Stone GM. Protein secretion by the endometrium during pregnancy in the ewe. Reprod Fertil Dev 1989; 1:15-30. [PMID: 2496436 DOI: 10.1071/rd9890015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Mature Merino ewes were surgically prepared so that after mating they became unilaterally pregnant. Ewes were killed between days 91 and 124 of pregnancy and the uterine milk was collected from the ligated uterine horn. Explants of intercaruncular and intercotyledonary endometrium were collected from the ligated and unligated uterine horns, respectively, and incubated in the presence of L-[4,5-3H]leucine to determine in vitro rates of protein synthesis and secretion. Protein:DNA and DNA:wet tissue ratios were also determined in the explants from some ewes. The proteins secreted in vitro and those present in uterine milk were partially characterized, using several procedures. Antisera raised in rabbits against uterine milk and absorbed against plasma from an ovariectomized ewe were used to detect uterine milk antigens in a variety of tissues and plasma. An average of 150 +/- 26 mL of creamy coloured uterine milk containing 30.7 +/- 4.6 mg mL-1 protein was recovered from 14 ewes. The rates of protein synthesis and secretion in vitro and the protein:DNA ratio were all higher in intercotyledonary than in intercaruncular endometrium, but the predominant radiolabelled protein(s) secreted in vitro by both types of endometrium was shown by gel filtration to have a molecular weight of approximately 60 kDa. This 'uterine pregnancy protein' was not secreted by endometrial explants from a non-pregnant ewe. Uterine milk contained a substantial amount of 60 kDa protein. The molecular weight and lack of sub-unit structure of the 60 kDa fraction of proteins secreted in vitro was confirmed by SDS-acrylamide electrophoresis and density gradient centrifugation. Pronase treatment confirmed the proteinaceous nature of the 60 kDa fraction, and heparin-Sepharose affinity chromatography showed that the predominant secreted protein(s) in this fraction was a glycoprotein. In immuno-double-diffusion tests antisera prepared against uterine milk produced a number of precipitation bands against both uterine milk and culture medium (after incubation of endometrial explants from a pregnant ewe) and a single band against allantoic fluid, but did not react with plasma from an ovariectomized ewe or a day-124 pregnant ewe or its fetus. The antisera did not react with lung, kidney or liver from the same pregnant ewe or with uterine flushings from a non-pregnant ewe. In immuno-electrophoresis tests, at least eight distinct antigens were detected in uterine milk and three of these were also present in allantoic fluid.
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Affiliation(s)
- X Zhang
- Department of Animal Husbandry, University of Sydney, Camden, N.S.W
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6869
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Abstract
Twelve biopsies of clinically normal oral mucosa taken from HIV seropositive patients have been investigated by means of light- and electron microscopy. Vascular abnormalities were found in all biopsies, regardless of the clinical stage of the HIV infection. In particular slit-like vascular channels, sparseness of intercellular junctions and swollen, protruded endothelial cells with an increased quantity of Weibel-Palade bodies were noticed. These findings were similar to those described in lesions of early stage Kaposi's sarcoma.
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Affiliation(s)
- X Zhang
- Department of Oral Pathology, Beijing Medical University, China
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6870
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Zhang X, Stone GM, Miller BG. In vitro binding of progesterone, cronolone and medroxyprogesterone acetate to uterine progesterone receptors of sheep, rabbit and mouse. Reprod Fertil Dev 1989; 1:223-30. [PMID: 2479058 DOI: 10.1071/rd9890223] [Citation(s) in RCA: 5] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Various aspects of the binding of the synthetic progesteongens, cronolone (9 alpha-fluoro-11 beta-hydroxy-17 alpha-acetoxypregn-4-ene-3,20-dione) and medroxyprogesterone acetate (6 alpha-methyl-17 alpha-acetoxypregn-4-ene-3,20-dione, MAP) to uterine cytosol progesterone receptors of the sheep, rabbit and mouse were studied, in an attempt to explain interesting species differences in the biological activity of these steroids. For the sheep, data for binding-site concentration, relative binding affinity (RBA), dissociation constant (Kd) and rates of association and dissociation indicate specific binding of cronolone to the progesterone receptor and these would seem to explain in part the high progestational activity of cronolone in this species. By contrast, with the mouse, there was only a low level of specific binding of cronolone and this appears to explain its inability to maintain pregnancy in this species. Results for the binding activity of cronolone in rabbit uterus were similar to those for the sheep and thus inability of cronolone to maintain pregnancy in the rabbit is not explained by a failure to bind the progesterone receptor. Species differences in binding to the progesterone receptor were also seen with MAP where the RBA, with respect to progesterone, was high in the sheep and rabbit and lower in the mouse. The results, however, do not relate directly to the progestational activity of MAP in these species. Overall, the data indicate that species differences in the binding activity of steroid receptors constitute one factor that causes species-dependent variation in biological responses to progestogens.
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Affiliation(s)
- X Zhang
- Department of Animal Husbandry, University of Sydney, Camden, N.S.W., Australia
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6871
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Zhang X, Miller BG. Some biological activities of cronolone and medroxyprogesterone acetate in the uterus of the sheep, mouse and rabbit. Reprod Fertil Dev 1989; 1:157-69. [PMID: 2477875 DOI: 10.1071/rd9890157] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Cronolone (9 alpha-fluoro-11 beta-hydroxy-17 alpha-acetoxypregn-4-ene-3,20-dione) is widely employed to regulate breeding activity in the ewe, but its biological activity in the uterus of this and most other species has not been studied. In this study several in vivo uterus-related activities of cronolone have been examined in the sheep, mouse and rabbit. In some experiments the corresponding activities of medroxyprogesterone acetate (6 alpha-methyl-17 alpha-acetoxypregn-4-ene-3,20-dione, MAP) were also examined. Cronolone maintained pregnancy in ovariectomized ewes but not in ovariectomized mice and rabbits; it terminated pregnancy in some mice and in all rabbits that were receiving daily progesterone treatment. Cronolone could not sensitize the mouse uterus for the induction of the decidual-cell reaction or block the induction of such sensitivity by progesterone, but did support limited growth of the oil-stimulated horn after sensitization with progesterone. Cronolone induced uteroglobin secretion by rabbit endometrium. It was concluded that, whereas MAP is a potent progestogen in the sheep, mouse and rabbit, cronolone is a progestogen in the sheep and rabbit only. In the mouse and especially the rabbit, cronolone has other, non-progestational activities, which block pregnancy.
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Affiliation(s)
- X Zhang
- Department of Animal Husbandry, University of Sydney, Camden, N.S.W
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6872
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Affiliation(s)
| | | | - X. Zhang
- Oakland University (United States)
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6873
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Shen WF, Gong LS, Zhang JS, Cui LQ, Zhang X, Zheng AF. Infarct artery recanalization and collateral circulation in patients with myocardial infarction. Chin Med J (Engl) 1988; 101:915-8. [PMID: 3150741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
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6874
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Ju G, Duan XJ, Zhang X. Serotonin-like immunoreactive fibers in the medial dorsal accessory group and the anterior fornical nucleus of the magnocellular neurosecretory system in the rat. Neurosci Lett 1988; 93:19-22. [PMID: 3211367 DOI: 10.1016/0304-3940(88)90005-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The area lateral to the stria medullaris and the fornix at the level of the interventricular foramen, an area known to be occupied by the medial dorsal accessory group and the anterior fornical nucleus of the magnocellular neurosecretory system, was found to be studded with serotonin (5-HT)-like immunoreactive (LI) varicosities. Double immunostaining with antisera against 5-HT and oxytocin (OXY) proved that the 5-HT-LI varicosities were in close proximity to the OXY-LI neurons in the medial dorsal accessory group and the anterior fornical nucleus. These nuclei were distributed more densely with 5-HT-LI varicosities than other cell groups in the magnocellular neurosecretory system.
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Affiliation(s)
- G Ju
- Department of Neurobiology, Fourth Military Medical University, Xi'an, People's Republic of China
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6875
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Gonis A, Zhang X, Nicholson DM. Electronic-structure method for general space-filling cell potentials. Phys Rev B Condens Matter 1988; 38:3564-3567. [PMID: 9946711 DOI: 10.1103/physrevb.38.3564] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [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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6876
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Abstract
The effects of D-Ala2-D-Leu5-enkephalin (DADLE), a specific delta receptor agonist, on spinal control of cardiovascular function, were investigated by its intrathecal (i.th) injection into the spinal subarachnoid space at the T-9 level. In chloralose-anesthetized rats, DADLE (17.5, 35 and 70 nmol, i.th) caused dose-dependent hypotension and bradycardia. The mean maximal hypotension by 70 nmol of DADLE was -45 +/- 7 mmHg, with a bradycardia of -79 +/- 15 beats/min. These inhibitory cardiovascular effects were antagonized by the opiate antagonist naloxone (50 nmol, i.th.) given prior to DADLE. Intrathecal injection of DADLE also decreased splanchnic sympathetic nerve discharge (-46 +/- 5%). DADLE (70 nmol) given i.v. did not cause significant changes in mean arterial pressure (MAP) and heart rate (HR). Neither bilateral vagotomy nor pretreatment with atropine (0.2 mg/kg, i.v.) prevented the BP and HR effects of intrathecal injection of DADLE at a dose of 35 nmol. DADLE at this dose failed to produce significant alteration in the frequency of respiration and blood PaO2, PaCO2 and blood pH. In conscious rats, 140 nmol of DADLE (i.th.) did not produce any consistent changes in MAP and HR. These data suggest that intrathecal injection of DADLE inhibits central sympathetic activity, possibly at a spinal locus.
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MESH Headings
- Animals
- Atropine/pharmacology
- Blood Gas Analysis
- Enkephalin, Leucine/analogs & derivatives
- Enkephalin, Leucine/pharmacology
- Enkephalin, Leucine-2-Alanine
- Heart Rate/drug effects
- Hydrogen-Ion Concentration
- Injections, Intravenous
- Injections, Spinal
- Male
- Naloxone/pharmacology
- Rats
- Rats, Inbred Strains
- Receptors, Opioid/drug effects
- Receptors, Opioid/physiology
- Receptors, Opioid, delta
- Respiratory Function Tests
- Vagotomy
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Affiliation(s)
- S J Li
- Department of Pharmacology, School of Medicine, East Carolina University, Greenville, NC 27858-4354
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6877
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Fang X, Zhang X, Ma Q, Liu Y, Watanabe T. Calculation of the electron-stripping cross sections of Ne charged ions by proton impact. Phys Rev A Gen Phys 1988; 38:497-500. [PMID: 9900191 DOI: 10.1103/physreva.38.497] [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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6878
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Abstract
To evaluate the normal physical growth and development of Chinese children and to compare the nutritional status of today with that of ten years ago, a second national cross-sectional growth survey was undertaken in the same urban and suburban rural areas of nine main cities in China in 1985 as in 1975. In this survey 152,874 boys and girls from birth to age 7.0 years were measured for weight, height, sitting height, and chest, head and upper arm circumferences. Compared with the results in 1975, the condition of growth and development of children for both boys and girls from urban or suburban rural areas has been relatively much improved. Average weight and height had increased in the past 10 years by 0.40 kg and 1.8 cm respectively, in 6-7-year-old children. The greater part of the increase in height has been due to increase in leg length. The urban-rural difference in stature has become smaller, as the increase has been greater in rural areas. The data from this survey can be used as a new growth standard for Chinese children.
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Affiliation(s)
- X Zhang
- Coordinating Study Group on the Physical Growth and Development of Children, Capital Institute of Paediatrics, Beijing, China
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6879
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Abstract
Ten adult midsagittally sectioned cadaver heads were used to measure the distance between the apex of the central incisor or canine teeth and the attachment of the genioglossus or geniohyoid muscles. Measurements were made on both cadaver specimens and radiographs. The results of the two methods showed no statistically significant difference. The results indicate that there is a relatively small chance (5.6%) of including the genioglossus attachment in the lingual pedicle if an anterior mandibular subapical osteotomy is positioned 3 to 5 mm below the incisor apex but a large chance (65%) of including the genioglossus muscle when the osteotomy procedure includes the canine teeth.
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Affiliation(s)
- X Zhang
- University of Texas Health Science Center at Dallas Center for Correction of Dentofacial Deformities
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6880
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Hou FF, Zhang X. [Fibronectin in patients with chronic renal failure undergoing dialysis]. Zhonghua Nei Ke Za Zhi 1988; 27:348-51, 389. [PMID: 3197506] [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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6881
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6882
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Abstract
We investigated the possibility that the impairment of baroreflex control of heart rate was due to an action of ethanol on the central component of the baroreflex arc. Baroreceptors and baroreceptor afferents were removed from the arc by sino-aortic denervation and the central end of the left aortic depressor nerve was stimulated. Stimulation frequency response curves relating the decreases in blood pressure, heart rate and sympathetic efferent nerve discharge to the frequency of stimulation were constructed before and after the administration of 0.33, 0.66 and 1 g/kg of ethanol administered systemically. Except for a small decrease in blood pressure following the 1 g/kg dose, ethanol administration did not produce any change in baseline heart rate or blood pressure but the frequency response curve of heart rate was reset by the two lower doses of ethanol whereas the dose of 1 g/kg produced frank impairment of baroreflex control. Similarly the dose of 1 g/kg also impaired the depressor response to aortic nerve stimulation whereas it did not impair the baroreflex control of sympathetic efferent discharge. These data suggest a differential effect of ethanol on central pathways that control baroreflex responses. To ensure that the effect of ethanol was not due to an action of ethanol on an end organ, the heart, a separate group of rats were prepared with sino-aortic denervation and the peripheral end of the cut right vagus nerve was stimulated with increasing frequency. Ethanol did not affect the response to stimulation of the vagus nerve showing that the impairment of baroreflex control of cardiovascular variables was primarily of central origin.
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Affiliation(s)
- X Zhang
- Department of Pharmacology, School of Medicine, East Carolina University, Greenville, NC 27858
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6883
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Zhan B, Wang L, Zhang X, Sun Y, Chen M. Homotransplantation of testis: experimental study and clinical practice (13 case reports). Transplant Proc 1988; 20:918-21. [PMID: 3347960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- B Zhan
- Urological Laboratory, First Affiliated Hospital, Hubei Medical College, Wuhan, China
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6884
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Zhang X, Abdel-Rahman AR, Wooles WR. A differential action for ethanol on baroreceptor reflex control of heart rate and sympathetic efferent discharge in rats. Proc Soc Exp Biol Med 1988; 187:14-21. [PMID: 3340614 DOI: 10.3181/00379727-187-42630] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [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
The acute effects of ethanol (0.33, 0.66, or 1 g/kg) on baroreflex control of heart rate (HR) and sympathetic efferent discharge (SED) were investigated in chloralose-anesthetized rats. The two higher doses of ethanol caused a progressive and significant increase in baseline SED and a slight increase in HR. That these effects were ethanol mediated is suggested by the absence of any change in blood pressure following ethanol injection in any amount used and the finding that equivolume saline had no effect on any of the tested parameters. On the other hand, the baroreflex slope of the MAP-SED relationship after ethanol was similar to the control (preethanol) value in contrast to a significant decrease in the baroreflex slope of MAP-HR under the same conditions. These findings suggest that the sensitivity of the reflex control of SED was preserved whereas that of HR was impaired after acute ethanol administration. Since these findings were obtained in the same animals, our data suggest that acute ethanol has a differential action on reflex control of SED and HR. Further, the significant increase in SED after moderate and high doses of ethanol suggests an increased central sympathetic tone as recordings were made from preganglionic nerve fibers (splanchnic nerve). The absence of an increase in baseline MAP, in spite of a significant increase in baseline SED following acute ethanol injection, could be explained, at least in part, by an ethanol-evoked reduction in pressor responsiveness to phenylephrine, an alpha-adrenergic agonist.
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Affiliation(s)
- X Zhang
- Department of Pharmacology, East Carolina University School of Medicine, Greenville, North Carolina 27858
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6885
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Loke SL, Stein C, Zhang X, Avigan M, Cohen J, Neckers LM. Delivery of c-myc antisense phosphorothioate oligodeoxynucleotides to hematopoietic cells in culture by liposome fusion: specific reduction in c-myc protein expression correlates with inhibition of cell growth and DNA synthesis. Curr Top Microbiol Immunol 1988; 141:282-9. [PMID: 3063445 DOI: 10.1007/978-3-642-74006-0_38] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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6886
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Wang DZ, Yan JS, Zhang X, Ping YM, Li BQ. [Multicentric carcinoma of the esophagus and double primary malignant neoplasm of the upper alimentary tract--report on 44 patients]. Zhonghua Zhong Liu Za Zhi 1988; 10:51-3. [PMID: 3416698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
During the past fifteen years, 44 patients with multicentric carcinoma of the esophagus or double primary malignant neoplasm of the upper alimentary tract, collected from 5316 patients with cancer of esophagus or gastric cardia in the same period, were treated in our hospital. The incidence was 0.83%. All were proven by pathology. Exploratory thoracotomy was done in 32 patients and 26 lesions were resected with a resection rate of 81.3%. All patients with cancer resected survived over 1 year, 6 out of 9 survived over 3 years and 2 out of 3, over 5 years. In the 18 patients who received chemotherapy alone, 12 were followed and all died within 1 year. It is shown that multicentric carcinoma of the esophagus or double malignant neoplasm of the upper alimentary tract should be given energetic treatment. Finally, the incidence, diagnosis criteria, diagnosis method, etiology and management are discussed with a review of literature.
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Affiliation(s)
- D Z Wang
- Fourth Hospital, Hebei Medical College, Shijazhuang
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6887
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Ulker N, Zhang X, Samuel CE. Mechanism of interferon action. I. Characterization of a 54-kDa protein induced by gamma interferon with properties similar to a cytoskeletal component. J Biol Chem 1987; 262:16798-803. [PMID: 3119591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
A polypeptide of 54-kDa molecular mass (p54) induced by molecularly cloned human interferon gamma (rIFN-gamma) in human amnion U cells was characterized biochemically and immunologically. Rabbit polyclonal antibody to p54 was prepared using p54 purified from human amnion U cells as the immunogen. As measured by immunoprecipitation of [35S]methionine pulse-labeled extracts or by immunoblot analysis of unlabeled extracts, the synthesis of p54 was greatly elevated in three human cell lines treated with IFN-gamma, amnion U, fibroblast GM2767, and fibroblast F153. Moreover, the rabbit anti-p54 polyclonal antibody preparation cross-reacted with cytoskeleton-associated polypeptides prepared from human cells and from sea urchin embryos. By use of a monoclonal antibody probe directed against the common domain of intermediate filaments (anti-intermediate filament antibody), it was established that intermediate filament components are also induced by rIFN-gamma. Anti-p54 polyclonal antibody cross-reacted with anti-intermediate filament antibody-recognized, rIFN-gamma-induced polypeptides. Thus, it appears that p54 may be an IFN-induced cytoskeleton-associated polypeptide.
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Affiliation(s)
- N Ulker
- Section of Biochemistry and Molecular Biology, University of California, Santa Barbara 93106
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6888
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Ulker N, Zhang X, Samuel CE. Mechanism of interferon action. I. Characterization of a 54-kDa protein induced by gamma interferon with properties similar to a cytoskeletal component. J Biol Chem 1987. [DOI: 10.1016/s0021-9258(18)45454-3] [Citation(s) in RCA: 9] [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: 10/22/2022] Open
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6889
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Liu CJ, Ma TX, Wang ZQ, Chang JW, Liu XB, Sui ZF, Zhang X. [Establishment of epithelial cell line TBC-27 from a human bladder transitional cell carcinoma and its biological characteristics]. Zhonghua Zhong Liu Za Zhi 1987; 9:427-9, 21. [PMID: 3452540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The cell line TBC-27, from a human bladder transitional cell carcinoma Grade II, was established and maintained for 8 months through 27 passages. TBC-27 cells have the epithelioid cell morphology during culture. The population doubling time of the 14th generation cells was 27 hours by growth curve. The chromosome karyotype of the 12th generation cells consisted mainly of hypodiploid (mode 40-45). Ultrastructurally, there was a great deal of freeribosome and vesicle in the cytoplasm and a great number of atypical microvilli on the surface of the 21st generation cells. The heterotransplantation test revealed that the xenografted tumor in the immunosuppressed suckling rats was similar to the initial bladder carcinoma in histology.
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Affiliation(s)
- C J Liu
- Institute of Uro-surgery, Tianjin
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6890
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Hou FF, Zhang X. [Beta 2-microglobulin in IgA nephropathy]. Zhonghua Nei Ke Za Zhi 1987; 26:580-3, 621-2. [PMID: 3325245] [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: 01/05/2023]
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6891
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Gonis A, Zhang X, Freeman AJ, Turchi P, Stocks GM, Nicholson DM. Configurational energies and effective cluster interactions in substitutionally disordered binary alloys. Phys Rev B Condens Matter 1987; 36:4630-4646. [PMID: 9943474 DOI: 10.1103/physrevb.36.4630] [Citation(s) in RCA: 54] [Impact Index Per Article: 1.5] [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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6892
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Pan K, Lin Y, Fu Z, Zhou K, Cai Z, Chen Z, Zhang Y, Dong Y, Wu S, Ma X, Wang Y, Chen S, Wang J, Zhang X, Ni C, Zhang Z, Xia Z, Fan Z, Tian G. The three-dimensional structure of trichosanthin. Acta Crystallogr A 1987. [DOI: 10.1107/s0108767387084915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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6893
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Liu LS, Zhang X, Jin L. [Changes in urinary catecholamines of DOCA/saline hypertensive rats and the influence of environmental stress]. Zhonghua Xin Xue Guan Bing Za Zhi 1987; 15:228-30, 247-8. [PMID: 3440425] [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: 01/05/2023]
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6894
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6895
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Chang JW, Tan YB, Zhang X, Ma TX. "Inverted tumor" of the urinary bladder. Chin Med J (Engl) 1987; 100:305-11. [PMID: 3115696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
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6896
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6897
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Hong JX, Wei MH, Zhang X, Liu YW, Wan DF, Gu JR, Yu XS, Shi DR, Zhang HZ. [Localization of oncoprotein P21ras in the human liver cancer]. Zhonghua Zhong Liu Za Zhi 1987; 9:81-4. [PMID: 3308383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Using the human liver cancer DNA transfected NIH/3T3 cell line, the human N-ras oncogene and the over expression of the oncoprotein P21ras was demonstrated, BALB/C mice were immunized. The spleen cells from the immunized mice were fused with SP2/0 myeloma cells. After the HAT medium selection and screening, two hybridoma cell lines, SCI-Oncogema 1 and 2, were established. In the immunoprecipitation test, the molecular weight of the protein reacting to Oncogema 1 was 21,000. This M.W 21,000 protein possessed the capability to bind with GTP, i.e. the character of P21ras. These data indicate that the Oncogema 1 is the monoclonal antibody against P21ras. Using Oncogema 1, specimens from 6 liver cancer patients were studied by immunopathology. With ABC stain, it was observed that the malignant cells in all the samples showed dark staining; the P21ras revealed over expression. Although the staining was heterogeneous, it implied that the ras oncogene was involved in the carcinogenesis of these six samples. No over expression was seen in the normal liver cells even in those around the cancerous lesion. However, dysplastic cells were moderately stained which means that the ras oncogene was activated and P21ras over expressed in these cells. The results suggest that the ras oncogene and P21ras play an important role in the early stage of liver cancer carcinogenesis.
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6898
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Zhang X, Shen B. [[Developing cities of medium size and urbanization]]. Renkou Yanjiu 1987:19-22. [PMID: 12282751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
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6899
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Zhang X, Yi SY. An experimental study on acute compression of the internal capsule-basal ganglia region. Chin Med J (Engl) 1987; 100:58-62. [PMID: 3109827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
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6900
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Zhang X, Hwang M, Gonis A, Freeman AJ. Numerical and analytic methods for the study of disordered alloy surfaces. Phys Rev B Condens Matter 1986; 34:5169-5176. [PMID: 9940343 DOI: 10.1103/physrevb.34.5169] [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: 04/11/2023]
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