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[Pain induced during care, what non-drug treatment in post-stroke?]. REVUE DE L'INFIRMIERE 2021; 70:45-47. [PMID: 33742595 DOI: 10.1016/j.revinf.2021.01.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
At the neuro-vascular emergencies unit at the Pitié-Salpêtrière (AP-HP,Paris), a population that is mostly elderly and dependent is cared for daily by caregivers. With an average age of stroke of 74 years, these patients regularly suffer from neuropathic pain in post-stroke situations. Caregivers are very vigilant in preventing pain induced during care, particularly during mobilization, and are developing holistic pain management that includes non-drug approaches.
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Eosinophilic esophagitis: Pathophysiology, diagnosis, and management. Arch Pediatr 2019; 26:182-190. [DOI: 10.1016/j.arcped.2019.02.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 12/10/2018] [Accepted: 02/03/2019] [Indexed: 12/31/2022]
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Application of Heteropolyacid H4SiMo3W9O40 for the Preparation of Bimetallic MoWS2/Al2O3 Hydrotreatment Catalysts. KINETICS AND CATALYSIS 2018. [DOI: 10.1134/s0023158417060088] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Molecular approach to prepare mixed MoW alumina supported hydrotreatment catalysts using H4SiMonW12−nO40 heteropolyacids. Catal Sci Technol 2018. [DOI: 10.1039/c8cy00672e] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Higher catalytic conversions and different selectivity ratios are explained by the formation of the mixed (MoW)S2 active phase when using mixed MoW heteropolyacid as starting material.
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Trimetallic NiMoW/Al2O3 hydrotreating catalyst based on H4SiMo3W9O40 mixed heteropoly acid. RUSS J APPL CHEM+ 2017. [DOI: 10.1134/s1070427217070151] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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One-Pot Sol-Gel Preparation for Efficient Cobalt-Molybdenum-Titania Hydrotreating Catalysts. ChemCatChem 2012. [DOI: 10.1002/cctc.201200165] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Effect of water on the stability of Mo and CoMo hydrodeoxygenation catalysts: A combined experimental and DFT study. J Catal 2011. [DOI: 10.1016/j.jcat.2011.06.006] [Citation(s) in RCA: 119] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Interaction of Thiophene with a Molybdenum Disulfide Catalyst: An Inelastic Neutron Scattering Study. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bscb.19951040422] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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New Developments in Hydrotreating Catalysis : Characterization and Optimization of Niw/A12O3 Catalysts. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bscb.19870961101] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Death switch for gene therapy: application to erythropoietin transgene expression. Braz J Med Biol Res 2010; 43:634-44. [PMID: 20499015 DOI: 10.1590/s0100-879x2010007500046] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2009] [Accepted: 04/30/2010] [Indexed: 11/22/2022] Open
Abstract
The effectiveness of the caspase-9-based artificial "death switch" as a safety measure for gene therapy based on the erythropoietin (Epo) hormone was tested in vitro and in vivo using the chemical inducer of dimerization, AP20187. Plasmids encoding the dimeric murine Epo, the tetracycline-controlled transactivator and inducible caspase 9 (ptet-mEpoD, ptet-tTAk and pSH1/Sn-E-Fv'-Fvls-casp9-E, respectively) were used in this study. AP20187 induced apoptosis of iCasp9-modified C2C12 myoblasts. In vivo, two groups of male C57BI/6 mice, 8-12 weeks old, were injected intramuscularly with 5 microg/50 g ptet-mEpoD and 0.5 microg/50 g ptet-tTAk. There were 20 animals in group 1 and 36 animals in group 2. Animals from group 2 were also injected with the 6 microg/50 g iCasp9 plasmid. Seventy percent of the animals showed an increase in hematocrit of more than 65% for more than 15 weeks. AP20187 administration significantly reduced hematocrit and plasma Epo levels in 30% of the animals belonging to group 2. TUNEL-positive cells were detected in the muscle of at least 50% of the animals treated with AP20187. Doxycycline administration was efficient in controlling Epo secretion in both groups. We conclude that inducible caspase 9 did not interfere with gene transfer, gene expression or tetracycline control and may be used as a safety mechanism for gene therapy. However, more studies are necessary to improve the efficacy of this technique, for example, the use of lentivirus vector.
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Structure and reducibility of titania-supported monomeric and dimeric molybdenum oxide entities studied by DFT calculations. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.theochem.2008.09.044] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Hydrogen species in CeNi 1OY and CeAl0.5Ni1OY mixed oxides' catalytic hydrogen reservoirs. ACTA ACUST UNITED AC 2009. [DOI: 10.1504/ijnhpa.2009.024777] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Comparison between XPS- and FTIR-analysis of plasma-treated polypropylene film surfaces. SURF INTERFACE ANAL 2008. [DOI: 10.1002/sia.2619] [Citation(s) in RCA: 206] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Effect of Thermal Treatment on Structure and Catalytic Activity of Supported Fischer-Tropsch Nano-Cobalt Catalysts for Clean Fuels. CHINESE J CHEM PHYS 2007. [DOI: 10.1088/1674-0068/20/06/743-747] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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X-ray photoelectron spectroscopy surface quantification of sulfided CoMoP catalysts. Relation between activity and promoted sites. Part II: Influence of the sulfidation temperature. SURF INTERFACE ANAL 2006. [DOI: 10.1002/sia.2249] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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CO Adsorption on CoMo and NiMo Sulfide Catalysts: A Combined IR and DFT Study. J Phys Chem B 2005; 110:1261-70. [PMID: 16471673 DOI: 10.1021/jp0536549] [Citation(s) in RCA: 114] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Experimental IR spectra of carbon monoxide adsorbed on a series of Mo/Al2O3, CoMo/Al2O3, and NiMo/Al2O3 sulfided catalysts have been compared to ab initio DFT calculations of CO adsorption on CoMo and NiMo model surfaces. This approach allows the main IR features of CO adsorbed on the sulfide phase to be assigned with an uncertainty of 15 cm(-1). On the CoMo system, the band at 2070 cm(-1) is specific of the promotion by Co and is assigned to CO interacting either with a Co atom or with a Mo atom adjacent to a Co atom. On the NiMo system, CO adsorption on Ni centers of the promoted phase leads to a high-wavenumber band at approximately 2120 cm(-1) that strongly overlaps the band at 2110 cm(-1) characteristic of nonpromoted Mo sites. For NiMo and CoMo catalysts, broad shoulders at low wave numbers (below 2060 cm(-1)) are characteristic of Mo centers adjacent to promoter atoms, indicating a partial decoration of the MoS2 edges by the promoter.
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A new experimental cell for in situ and operandoX-ray absorption measurements in heterogeneous catalysis. JOURNAL OF SYNCHROTRON RADIATION 2005; 12:680-4. [PMID: 16120995 DOI: 10.1107/s0909049505019618] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2005] [Accepted: 06/21/2005] [Indexed: 05/04/2023]
Abstract
A new X-ray absorption cell dedicated to in situ and operando experiments in heterogeneous catalysis has been built and tested. The cell consists of several boron nitride and stainless steel plates linked together using graphite seals. It allows the measurement of XANES and EXAFS spectra of heterogeneous catalysts within a wide range of photon energies in transmission mode under the flow of various oxidative and reductive gas mixtures at elevated temperatures. The cell is compact and easy to build. Catalysts are loaded into the cell as powders. The use of boron nitride and a small beam pathlength in the cell result in a low absorption of the X-ray beam at lower energies. The cell was tested by in situ characterizing cobalt species during oxidative and reductive pre-treatments of a silica-supported Fischer-Tropsch catalyst. An operando study of methanol conversion over alumina-supported molybdenum catalysts was also carried out.
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Influence of the Oxidation State of Rhodium in Three-Way Catalysts on Their Catalytic Performances: An in situ FTIR and Catalytic Study. Top Catal 2004. [DOI: 10.1023/b:toca.0000029773.89206.0f] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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22
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In situ Raman characterisation of surface modifications during NO transformation over automotive Pd-based exhaust catalysts. J Mol Struct 2003. [DOI: 10.1016/s0022-2860(03)00111-x] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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23
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In situ characterization by Raman and IR vibrational spectroscopies on a single instrument: DeNOxreaction over a Pd/γ-Al2O3catalyst. Phys Chem Chem Phys 2003. [DOI: 10.1039/b306045b] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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24
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Surface Raman spectroscopic study of NO transformation over Pd-based catalysts. Phys Chem Chem Phys 2003. [DOI: 10.1039/b305819k] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Theoretical Study of the MoS2 (100) Surface: A Chemical Potential Analysis of Sulfur and Hydrogen Coverage. 2. Effect of the Total Pressure on Surface Stability. J Phys Chem B 2002. [DOI: 10.1021/jp0134603] [Citation(s) in RCA: 96] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Interaction of oxomolybdenum species with .gamma.c-alumina and .gamma.c-alumina modified by silicon. 2. The molybdena/.gamma.c-alumina and molybdena/silica/.gamma.c-alumina systems. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100124a029] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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27
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Study of nickel-molybdenum-.gamma.-aluminum oxide catalysts by x-ray photoelectron and Raman spectroscopy. Comparison with cobalt-molybdenum-.gamma.-aluminum oxide catalysts. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j150616a010] [Citation(s) in RCA: 199] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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28
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Study of oxidic and reduced alumina-supported molybdate and heptamolybdate species by in situ laser Raman spectroscopy. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100311a018] [Citation(s) in RCA: 88] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Characterization by vanadium-51 solid-state NMR, laser Raman, and x-ray photoelectron spectroscopy of vanadium species deposited on .gamma.-Al2O3. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100316a044] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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30
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XPS characterization of adsorbed reaction intermediates on automotive exhaust gas catalysts: NO and CO + NO interactions with Pd. SURF INTERFACE ANAL 2002. [DOI: 10.1002/sia.1263] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Abstract
Sickle cell disease (SCD) is caused by a single point mutation in the human betaA globin gene that results in the formation of an abnormal hemoglobin [HbS (alpha2betaS2)]. We designed a betaA globin gene variant that prevents HbS polymerization and introduced it into a lentiviral vector we optimized for transfer to hematopoietic stem cells and gene expression in the adult red blood cell lineage. Long-term expression (up to 10 months) was achieved, without preselection, in all transplanted mice with erythroid-specific accumulation of the antisickling protein in up to 52% of total hemoglobin and 99% of circulating red blood cells. In two mouse SCD models, Berkeley and SAD, inhibition of red blood cell dehydration and sickling was achieved with correction of hematological parameters, splenomegaly, and prevention of the characteristic urine concentration defect.
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Parallel between infrared characterisation and ab initio calculations of CO adsorption on sulphided Mo catalysts. Catal Today 2001. [DOI: 10.1016/s0920-5861(01)00422-9] [Citation(s) in RCA: 90] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Oxygen tension and a pharmacological switch in the regulation of transgene expression for gene therapy. J Gene Med 2001; 3:498-504. [PMID: 11601763 DOI: 10.1002/jgm.217] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND The combination of physiologically and pharmacologically controlled elements may provide a means to ensure both the regulation and the safety of transgene expression--two major goals in gene therapy. METHODS A two-gene modulation system was developed that uses the following three levels of control: (i) the hypoxia-responsive element directing the transcription of the tetracycline-controlled transactivator (tTA); (ii) part of the oxygen-degradation domain limiting the production of tTA in normoxia; and (iii) the tetracycline switch of the transactivator activity (the tet-off system). RESULTS This triple-control system allowed high expression of the gene of interest (luciferase or erythropoietin) by transfected cells upon hypoxia and low expression under normoxia or in the presence of tetracycline. This control of transgene expression was also obtained in mouse tumors. CONCLUSIONS This multiple-control system is of interest for spatially restricting transgene expression into hypoxic tumors, and for finely adjusting the expression level of a therapeutic protein to the oxygen supply in medical applications such as neoangiogenesis or the erythropoietin-mediated treatment of anemia.
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Abstract
High doses of recombinant human erythropoietin (rhEpo) are required for the treatment of chronic anemia. Thus, it is clear that therapy for chronic anemia would greatly benefit from an erythropoietin derivative with increased erythropoietic activity rather than the native endogenous hormone. In this report, the activity of a human Epo-Epo dimer protein, obtained by recombinant technology, is described and compared with its Epo monomer counterpart produced under identical conditions. Although monomer Epo and dimer Epo-Epo had similar pharmacokinetics in normal mice, the increase in hematocrit value was greater with the dimer than with the monomer. Moreover, in clonogenic assays using CD34(+) human hematopoietic cells, the human dimer induced a 3- to 4-fold-greater proliferation of erythroid cells than the monomer. Controlled secretion of dimeric erythropoietin was achieved in beta-thalassemic mice by in vivo intramuscular electrotransfer of a mouse Epo-Epo plasmid containing the tetO element and of a plasmid encoding the tetracycline controlled transactivator tTA. Administration of tetracycline completely inhibited the expression of the mEpo dimer. On tetracycline withdrawal, expression of the Epo-Epo dimer resumed, thereby resulting in a large and sustained hematocrit increase in beta-thalassemic mice. No immunologic response against the dimer was apparent in mice because the duration of the hematocrit increase was similar to that observed with the monomeric form of mouse erythropoietin. (Blood. 2001;97:3776-3782)
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Abstract
OBJECTIVE A new intramuscular DNA electrotransfer method for erythropoietin (EPO) expression was evaluated in the natural mouse model of human beta-thalassemia (Hbb-thal1) in terms of its ability to reverse the anemia and improve the thalassemic features of erythrocytes. MATERIALS AND METHODS Intramuscular injection of small amounts of a plasmid encoding mouse EPO, immediately followed by controlled electric pulses, was used. RESULTS This procedure induced very high hematocrit levels in beta-thalassemic mice compared to nonelectrotransferred mice. The hematocrit increase was dose dependent, still increased 4 months after injection of plasmid DNA, and associated with a high transgenic EPO blood level in all mice (up to 2500 mU/mL of plasma). EPO gene electrotransfer not only led to a long-lasting and dose-dependent increase in the hematocrit but also to a 100% increase in the lifespan of erythrocytes of thalassemic mice. This was related to a nearly complete reestablishment of alpha/beta globin chain balance, as demonstrated by a marked decrease in unpaired alpha globin chain. Eight months after the first electrotransfer of pCMV-mEPO plasmid, reinjection of the same construct raised the hematocrit to a level close to that observed following the first electrotransfer. CONCLUSION This is the first description of the use of plasmid DNA to achieve long-term improvement in a mouse model of a human genetic disorder.
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Theoretical Study of the MoS2 (100) Surface: A Chemical Potential Analysis of Sulfur and Hydrogen Coverage. J Phys Chem B 2000. [DOI: 10.1021/jp0023819] [Citation(s) in RCA: 144] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Abstract
OBJECTIVE Future prospects for gene therapy of chronic anemias involve expression of the erythropoietin transgene, which is regulated by oxygen tension. However, other factors such as cytokines or the iron load of erythropoietin-expressing cells can concomitantly modulate transgene expression, as shown for the expression of the endogenous erythropoietin gene in human cell lines and in animals. We tested the effects of iron overload or depletion on the expression of the mouse erythropoietin transgene (cDNA), driven by the hypoxia-regulated phosphoglycerate kinase 1 promoter. MATERIALS AND METHODS Retrovirally transduced mouse cells (C3H fibroblasts or C2C12 myoblasts) were cultured in normoxia (room air, O2: 21%) or hypoxia (O2: 1.5%) in the presence or absence of hemin (an iron donor) or deferiprone (an iron chelator), both of which easily enter the cell. RESULTS Hemin inhibited the hypoxia-induced expression of the transgene. In contrast, deferiprone enhanced the hypoxia-induced expression of the erythropoietin transgene and induced its expression in normoxia. CONCLUSION These results show that, in addition to oxygen partial pressure, the intracellular iron content is critical in the modulation of hypoxia-regulated erythropoietin transgene expression.
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Abstract
The goal of the present study was to analyze if sustained delivery of elevated doses of recombinant erythropoietin (Epo), by genetically modified and immunoprotected allogenic cells, was able to correct the chronic anemia, characteristic of a spontaneous mouse model of beta-thalassemia (Hbb thal 1). Mouse C2C12 myoblast cells were transfected with a plasmid containing the mouse Epo cDNA and a mutated dihydrofolate reductase (DHFR) gene for gene amplification upon administration of increasing doses of methotrexate. In order to immunoprotect the transplanted cells, the stably modified cells were loaded into polyethersulfone microporus hollow fibers which were implanted subcutaneously into Hbb thal 1 mice. An increase in hematocrit starting 2 weeks after implantation was associated with elevated blood levels of Epo and an improved red blood cell phenotype. The latter indicated an improvement of cell morphology and membrane defects, in particular a reduced amount of free alpha hemoglobin chain, the hallmark of globin chain imbalance in beta-thalassemia. A reduction of reticulocyte count contrasting with the increase in hematocrit was also observed suggesting an improved erythrocyte survival. We conclude that the phenotype can be durably improved in some beta-thalassemic mice upon in vivo delivery of recombinant Epo by polymer encapsulated cells. Sustained elevated delivery of recombinant Epo holds promise for the treatment of beta-thalassemia-associated chronic anemia.
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Alumina supported HDS catalysts prepared by impregnation with new heteropolycompounds. Comparison with catalysts prepared by conventional Co–Mo–P coimpregnation. Catal Today 1998. [DOI: 10.1016/s0920-5861(98)00230-2] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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The centromeric/nucleolar chromatin protein ZFP-37 may function to specify neuronal nuclear domains. J Biol Chem 1998; 273:9099-109. [PMID: 9535899 DOI: 10.1074/jbc.273.15.9099] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Murine ZFP-37 is a member of the large family of C2H2 type zinc finger proteins. It is characterized by a truncated NH2-terminal Krüppel-associated box and is thought to play a role in transcriptional regulation. During development Zfp-37 mRNA is most abundant in the developing central nervous system, and in the adult mouse expression is restricted largely to testis and brain. Here we show that at the protein level ZFP-37 is detected readily in neurons of the adult central nervous system but hardly in testis. In brain ZFP-37 is associated with nucleoli and appears to contact heterochromatin. Mouse and human ZFP-37 have a basic histone H1-like linker domain, located between KRAB and zinc finger regions, which binds double-stranded DNA. Thus we suggest that ZFP-37 is a structural protein of the neuronal nucleus which plays a role in the maintenance of specialized chromatin domains.
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Abstract
The SOX gene family consists of a large number of embryonically expressed genes capable of encoding putative transcription factors and related by a DNA-binding domain, the HMG-box. We cloned and characterized the ovine SOX2 transcript using the screening of a testis (12dpp) cDNA library with a probe containing the SRY-HMG-box and we performed 3'RACE experiments. The ovine SOX2 sequence is strongly conserved in comparison to the human, mouse and chicken homologues and is located on sheep chromosome 1q33. The SOX2 expression pattern in developing gonads is consistent with the hypothesis that this gene plays a role in the germ cell line.
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Effects of ethylenediamine on the preparation of HDS catalysts: Comparison between Ni-Mo and Co-Mo based solids. HYDROTREATMENT AND HYDROCRACKING OF OIL FRACTIONS, PROCEEDINGS OF THE 1ST INTERNATIONAL SYMPOSIUM/6TH EUROPEAN WORKSHOP 1997. [DOI: 10.1016/s0167-2991(97)80018-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Alumina supported HDS catalysts prepared by impregnation with newheteropolycompounds. HYDROTREATMENT AND HYDROCRACKING OF OIL FRACTIONS, PROCEEDINGS OF THE 1ST INTERNATIONAL SYMPOSIUM/6TH EUROPEAN WORKSHOP 1997. [DOI: 10.1016/s0167-2991(97)80016-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Abstract
Because male ovine embryos develop faster than female embryos, the transcription of SRY and ZFY, two genes located on the Y chromosome, was examined in preimplantation stages using the reverse transcriptase polymerase chain reaction (RT-PCR). RNA was extracted from pools of ovine embryos matured and fertilized in vitro then cultured in synthetic oviduct fluid medium and recovered from 24 to 207 hr post-insemination (two-cell up to hatched blastocyst stage). Since primers used to amplify ZFY also amplify the homologue ZFX, located on the X chromosome, transcripts were differentiated by digestion with restriction enzymes. ZFY and ZFX transcripts were present in all stages examined following RT-PCR, whereas transcripts for SRY were undetectable in all investigated stages following either RT nested PCR or Southern analysis. The presence of ZFY transcripts suggests that Y chromosome is transcriptionally active during early ovine preimplantation development. The possible relationship between a faster growth of male embryos and the transcription of Y-linked genes at early stages of development is discussed.
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Critical cooling and warming rates to avoid ice crystallization in small pieces of mammalian organs permeated with cryoprotective agents. Cryobiology 1996; 33:436-46. [PMID: 8764852 DOI: 10.1006/cryo.1996.0044] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Measurements were made by differential scanning calorimetry on small pieces of rabbit kidney permeated with 2, 3-butanediol containing mainly the levo- and dextro-isomers. The critical cooling rates necessary to vitrify the pieces of organ, and the corresponding critical warming rates which are required to avoid crystallization in the vitrified samples, were determined. The dynamic method used for these determinations is described. The glass-forming tendency and the stability of the amorphous state were both greater in the kidney tissue samples than in the bulk cryoprotective solution. This result is discussed in the context of the lowering of the freezing point of water in emulsions and the promotion of supercooling in hydrogels and porous materials. In corresponding experiments with rat hearts impregnated with 1,2-propanediol, only the critical warming rate was reduced.
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Characterization of ovine SRY transcript and developmental expression of genes involved in sexual differentiation. THE INTERNATIONAL JOURNAL OF DEVELOPMENTAL BIOLOGY 1996; 40:567-75. [PMID: 8840189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
In mammals, the presence of SRY, the sex-determining gene located on the Y chromosome is required to induce the gonadal anlage to differentiate as a testis, whereas its absence leads to the development of an ovary. We report here the characterization by 5' and 3' RACE analysis of several SRY transcripts which are expressed in the ovine male developing gonads. These transcripts were not detected in any other fetal tissues and were expressed only in the genital portion of the urogenital ridge. The temporal profile of SRY expression analyzed by RT-PCR suggests that in the sheep fetus the role of SRY is not limited to initiating Sertoli cell differentiation as in mice. Indeed, SRY transcripts persist after the full differentiation of the testis. In addition to SRY, other genes are known to be involved in mammalian sex determination: Wilms' tumor gene WT-1, steroidogenic factor gene Ftz-F1 (SF-1) and anti-Müllerian hormone (AMH). We investigated the expression patterns of these genes by RT-PCR during fetal development in sheep gonads. Concerning WT-1 and SF-1, our results are consistent with those described in mice where the earliest expression was detected before the sexual differentiation in both sexes. In male, the ontogenesis of AMH transcription corresponds to the seminiferous cords formation (30 dpc). In female, we have observed the presence of SF-1 transcripts from the undifferentiated stage until birth. In addition, P450 aromatase expression is detected from 30 dpc and is correlated with the presence of 17-beta estradiol in sheep ovary. These data reveal significant differences between rodent and ruminant models concerning the sex-determining pathway.
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[Urachal adenocarcinoma associated with urothelial tumor of the bladder. Report of a case]. Prog Urol 1996; 6:288-91. [PMID: 8777426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The authors report a rare association of adenocarcinoma of the urachus and urothelial bladder carcinoma. Treatment consisted of cystoprostatectomy with removal of the urachus and cutaneous ureterostomy. A review of the literature indicates that adjuvant treatment has yet to be defined. This is a chance association whose prognosis depends on the invasive nature of the urothelial tumour.
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48
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Cryopreservation of organs: NMR follow-up of cryoprotectant perfusion in rabbit kidneys. Transplant Proc 1996; 28:346-8. [PMID: 8644255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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Abstract
We report the case of a transplantation of a horseshoe kidney to 2 recipients after isthmic section of the kidney. A review of the literature since 1975 mentions only 14 cases of transplantation of a horseshoe kidney. In the absence of a significant urological clinical history of the donor, the presence of a horseshoe kidney, in the case of multiorgan harvesting, does not represent a contraindication for transplantation.
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Localization of ZNF164, ZNF146, GGTA1, SOX2, PRLR and EEF2 on homoeologous cattle, sheep and goat chromosomes by fluorescent in situ hybridization and comparison with the human gene map. CYTOGENETICS AND CELL GENETICS 1996; 72:342-6. [PMID: 8641144 DOI: 10.1159/000134218] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The six following genes: zinc finger proteins 164 (ZNF164) and 146 (ZNF146), alpha-galactosyltransferase 1 (GGTA1), SRY-related HMG-box 2 (SOX2), prolactin receptor (PRLR) and elongatin factor 2 (EEF2) have been localized by fluorescent in situ hybridization respectively on bovine and caprine chromosomes 17, 18, 11, 1, 20 and 7 and on sheep chromosomes 17, 14, 3, 1, 16, and 5. The comparison of the results with the localization of these genes in man (except for ZNF164) confirm the correspondences between human and bovine chromosomes established from heterologous chromosome painting data.
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