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Poltev VI, Danilov VI, Lesh A, Iurkevich AI, Deriabina AS, Gonzalez E. [Possible configuration of dimers of Gua-Cyt bases. Computation by molecular mechanic models and density functional theory]. BIOFIZIKA 2003; 48:821-9. [PMID: 14582406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
The energies of interactions between guanine and cytosine in various mutual positions were calculated by the methods of molecular mechanics with refined atom-atom potential functions and the quantum mechanics theory of density functional. Both methods indicate three types of mutual positions of bases in local energy minima. These types correspond to (1) nearly coplanar base positions with intermolecular hydrogen bond formation (base pairing); (2) arrangements of two bases in nearly parallel planes one above another (base stacking); and (3) nearly perpendicular positions of base planes. According to the calculations, the global energy minimum corresponds to the Watson-Crick base pair with three hydrogen bonds. A specific feature of the pair is a transition from many positions of type (2) to positions of type (1) without any energy barrier. This feature is revealed by both methods. Another special feature of this pair is a deviation, for most of mutual base positions, of the amine group atoms from the ring plane, the deviation being more pronounced for Gua. These features are important for understanding the conformational behavior of DNA fragments and the RNA structure.
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Grokhlina TI, Polteva NA, Gonzalez E, Deriabina AS, Poltev VI. [Interaction of caffeine with basic nucleic acids my a molecular mechanic method]. BIOFIZIKA 2003; 48:814-20. [PMID: 14582405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
To understand some aspects of the biological action of caffeine (CAF), the interaction energies for various mutual positions of CAF and DNA bases or basepairs were calculated. Three types of mutual CAF-base (CAF-basepair) arrangements corresponding to the minima of interaction energy were revealed. One type of minima correspond to the stacking arrangement of molecules. This type is important for interactions of CAF with DNA monomers and single-stranded fragments. The other two types of minima correspond to the formation of intermolecular hydrogen bonds. Some of these minima may occur during the interaction of CAF with the double helix. One of these types corresponds to the nearly in-plane position of molecules. The other type of minima correspond to the nearly perpendicular arrangement of molecule planes. The minima of the last type are supposed to be the most important for the interaction of CAF with the DNA duplex, and interaction energies for this type of minima have the most negative values.
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Andres A, Revilla Y, Ramos A, Gonzalez E, Vereda MS, Praga M, Morales E, Morales JM, Diaz R, Cruceyra G, Aguirre F, Leiva O, Gragera F. Helical computed tomography angiography is the most efficient test to assess vascular calcifications in the iliac arterial sector in renal transplant candidates. Transplant Proc 2003; 35:1682-3. [PMID: 12962756 DOI: 10.1016/s0041-1345(03)00626-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
UNLABELLED The increased scope of renal transplant indications has lead to a larger number of recipients with vascular problems due to arterial calcifications in the iliac region. Compared to magnetic resonance and conventional arteriography, helical computed tomography angiography (HCTA) accurately depicts arterial diseases, including the location and extent of arterial calcification. The objective of this study was to assess the value of HCTA with maximum-intensity-projection (MIP) reconstruction to evaluate iliac arterial calcifications and stenosis among candidates for renal transplantation. MATERIAL AND METHODS From December 1997 to March 2002, 114 HCTA scans with MIP reconstruction were performed in candidates for renal transplantation. Included patients fulfilled some of the following conditions: (a) older than 55 years, (b) diabetic, (c) second transplants, and (d) obvious vascular calcifications on plain abdominal x-ray. RESULTS Among the 114 patients, 33 (29%) were excluded for transplantation due to universal calcification of the iliac arterial sector, and 81 (71%) were included on the waiting list due to the presence of calcium-free areas for the vascular anastomosis. Transplantation, which was attempted in 28 of the 81 patients, was successful in 25 using the area programmed after HCTA analysis. The transplants failed in three cases because no calcium-free area could be found upon surgical examination. CONCLUSION HCTA with MIP reconstruction makes it possible to draw an exact map of the arterial calcifications of the iliac arterial sector, allowing better recipient selection and accurate planning for the vascular anastomosis and placement of the renal graft.
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Jawerbaum A, Sinner D, White V, Pustovrh C, Capobianco E, Gonzalez E. Modulation of nitric oxide concentration and lipid metabolism by 15-deoxy Delta12,14prostaglandin J2 in embryos from control and diabetic rats during early organogenesis. Reproduction 2002. [DOI: 10.1530/rep.0.1240625] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The concentration of 15-deoxy Delta(12,14)PGJ(2) (15dPGJ(2)) and its effects on nitric oxide generation and neutral lipid in embryos from control and neonatal streptozotocin-induced (n-stz) diabetic rats during organogenesis were investigated. 15dPGJ(2) is produced in embryos during organogenesis, and its production is lower in embryos of n-stz diabetic rats than in embryos from control rats. Nitrate and nitrite concentrations were higher in embryos from n-stz diabetic rats and were reduced in the presence of 15dPGJ(2) both in embryos from control and diabetic rats. Thus, decreased 15dPGJ(2) concentrations in embryos from n-stz diabetic rats may be related to the high nitric oxide concentrations found in those embryos. Exogenous 15dPGJ(2) decreased cholesterol and cholesteryl ester concentrations in embryos from control and n-stz diabetic rats, and reduced triacylglycerol concentrations in control embryos. Incorporation of [(14)C]acetate into lipids showed decreased de novo synthesis of cholesteryl ester and triacylglycerides in embryos from n-stz diabetic rats compared with controls. Exogenous 15dPGJ(2) reduced the incorporation of [(14)C]acetate into triacylglycerides, cholesterol and cholesteryl ester in embryos from both control and n-stz diabetic rats. 15dPGJ(2) is present in embryos during organogenesis, and reduces embryonic nitric oxide production and lipid synthesis. The lower 15dPGJ(2) concentration in embryos from n-stz diabetic rats may result in developmental alterations in this diabetic model.
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Jawerbaum A, Sinner D, White V, Pustovrh C, Capobianco E, Gonzalez E. Modulation of nitric oxide concentration and lipid metabolism by 15-deoxy Delta12,14prostaglandin J2 in embryos from control and diabetic rats during early organogenesis. Reproduction 2002; 124:625-31. [PMID: 12417000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
Abstract
The concentration of 15-deoxy Delta(12,14)PGJ(2) (15dPGJ(2)) and its effects on nitric oxide generation and neutral lipid in embryos from control and neonatal streptozotocin-induced (n-stz) diabetic rats during organogenesis were investigated. 15dPGJ(2) is produced in embryos during organogenesis, and its production is lower in embryos of n-stz diabetic rats than in embryos from control rats. Nitrate and nitrite concentrations were higher in embryos from n-stz diabetic rats and were reduced in the presence of 15dPGJ(2) both in embryos from control and diabetic rats. Thus, decreased 15dPGJ(2) concentrations in embryos from n-stz diabetic rats may be related to the high nitric oxide concentrations found in those embryos. Exogenous 15dPGJ(2) decreased cholesterol and cholesteryl ester concentrations in embryos from control and n-stz diabetic rats, and reduced triacylglycerol concentrations in control embryos. Incorporation of [(14)C]acetate into lipids showed decreased de novo synthesis of cholesteryl ester and triacylglycerides in embryos from n-stz diabetic rats compared with controls. Exogenous 15dPGJ(2) reduced the incorporation of [(14)C]acetate into triacylglycerides, cholesterol and cholesteryl ester in embryos from both control and n-stz diabetic rats. 15dPGJ(2) is present in embryos during organogenesis, and reduces embryonic nitric oxide production and lipid synthesis. The lower 15dPGJ(2) concentration in embryos from n-stz diabetic rats may result in developmental alterations in this diabetic model.
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Poltev VI, Deriabina AS, Gonzalez E, Grokhlina TI. [Interactions between nucleic acid bases. New parameters of potential functions and energy minima]. BIOFIZIKA 2002; 47:996-1004. [PMID: 12500562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
The parameters of atom-atom potential functions suggested by one of the authors in 1979-1986 were slightly changed. The changes were performed to achieve a better agreement with experimental data of interaction energy values in global minima and hydrogen bond lengths. These changes resulted in better accord with experimental values of distances between the layers in DNA monomer crystals and between the base pairs in oligonucleotide duplexes. The refined potential functions were used to calculate the energy of interactions between nucleic acid bases in various mutual positions. The calculations revealed a few types of mutual base arrangements in minima of interaction energy for each pairwise base combination. A new type of minima was found, which correspond to a nearly perpendicular arrangement of base rings and the formation of the intermolecular hydrogen bond.
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Gonzalez E, Kou R, Lin AJ, Golan DE, Michel T. Subcellular targeting and agonist-induced site-specific phosphorylation of endothelial nitric-oxide synthase. J Biol Chem 2002; 277:39554-60. [PMID: 12189156 DOI: 10.1074/jbc.m207299200] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The endothelial isoform of nitric-oxide synthase (eNOS) undergoes a complex pattern of covalent modifications, including acylation with the fatty acids myristate and palmitate as well as phosphorylation on multiple sites. eNOS acylation is a key determinant for the reversible subcellular targeting of the enzyme to plasmalemmal caveolae. We transfected a series of hemagglutinin epitope-tagged eNOS mutant cDNAs deficient in palmitoylation (palm(-)) and/or myristoylation (myr(-)) into bovine aortic endothelial cells; after treatment with the eNOS agonists sphingosine 1-phosphate or vascular endothelial growth factor, the recombinant eNOS was immunoprecipitated using an antibody directed against the epitope tag, and patterns of eNOS phosphorylation were analyzed in immunoblots probed with phosphorylation state-specific eNOS antibodies. The wild-type eNOS underwent agonist-induced phosphorylation at serine 1179 (a putative site for phosphorylation by kinase Akt), but phosphorylation of the myr(-) eNOS at this residue was nearly abrogated; the palm(-) eNOS exhibited an intermediate phenotype. The addition of the CD8 transmembrane domain to the amino terminus of eNOS acylation-deficient mutants rescued the wild-type phenotype of robust agonist-induced serine 1179 phosphorylation. Thus, membrane targeting, but not necessarily acylation, is the critical determinant for agonist-promoted eNOS phosphorylation at serine 1179. In striking contrast to serine 1179, phosphorylation of eNOS at serine 116 was enhanced in the myr(-) eNOS mutant and was markedly attenuated in the CD8-eNOS membrane-targeted fusion protein. We conclude that eNOS targeting differentially affects eNOS phosphorylation at distinct sites in the protein and suggest that the inter-relationships of eNOS acylation and phosphorylation may modulate eNOS localization and activity and thereby influence NO signaling pathways in the vessel wall.
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Marzal F, Gonzalez E, Minana A, Baeza A. Determination and Interpretation of Total and Transversal Linear Efficiencies in Push–Pull Ventilation Systems for Open Surface Tanks. ACTA ACUST UNITED AC 2002; 46:629-35. [PMID: 12270887 DOI: 10.1093/annhyg/mef078] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
A real-scale pilot installation simulating an open surface treatment tank with a push-pull ventilation system has been designed. From experiments carried out, typical representations of the total and transversal linear efficiencies show that when total efficiency is related to push flow rate, taking as a parameter the pull flow rate, a parabolic profile is obtained with a maximum point or plateau that increases as the pull flow increases. When the transversal linear efficiency is analysed, three general zones where losses occur to the exterior can be detected: (i) when the push flow rate is low, any distortion in the wall jet, whether external (e.g. in the air flow inside the workshop) or internal (e.g. thermal effects), provokes an escape from contaminant; (ii) in the impact zone, where the push flow impacts on the tank surface, distortion increases as the push flow rate increases; (iii) when the push/pull flow rate ratio increases and preferential currents are produced inside the exhaust hood, these escape and cause substantial losses in efficiency.
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Sarmiento MA, Stanganelli C, Cabrera J, Gonzalez E, Bengió RM. Anti-Epo and anti-Tpo antibodies in myelodysplastic syndromes. Eur J Haematol 2002; 69:189-90. [PMID: 12406016 DOI: 10.1034/j.1600-0609.2002.02829.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Marzal F, Gonzalez E, Minana A, Baeza A. Influence of push element geometry on the capture efficiency of push-pull ventilation systems in surface treatment tanks. THE ANNALS OF OCCUPATIONAL HYGIENE 2002; 46:383-93. [PMID: 12176707 DOI: 10.1093/annhyg/mef048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A full-scale installation which simulates a surface treatment tank provided with a push-pull ventilation system has been designed. This study examines the influence of the geometry of the push element on the capture efficiency of the system. It is observed that: (i) capture efficiency increases with the number of holes because of the continuous curtain formed, the size of the holes having no significant effect within the range studied (5-20 mm diameter); (ii) the push element is best supported on the tank wall so that no air from outside penetrates below the emitting jets because in this way the impact of the curtain on the tank occurs earlier and losses are less; (iii) the best results are obtained when the holes are directed downwards towards the tank surface at an angle of between 22 and 45 degrees.
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Herrero JC, Andrés A, Leiva O, Diaz R, Polo G, Aguirre F, Villacampa F, Rodicio JL, Gonzalez E, Morales JM, Praga M. Role of immunosuppressive treatments based on mycophenolate mofetil in posttransplantation renal surgical complications. Transplant Proc 2002; 34:96. [PMID: 11959201 DOI: 10.1016/s0041-1345(01)02682-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Latorre A, Morales E, Gonzalez E, Herrero JC, Ortiz M, Sierra P, Dominguez-Gil B, Torres A, Munoz MA, Andres A, Manzanares C, Morales JM. Clinical management of renal transplant patients with hepatitis C virus infection treated with cyclosporine or tacrolimus. Transplant Proc 2002; 34:63-4. [PMID: 11959186 DOI: 10.1016/s0041-1345(01)02678-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Andrés A, Herrero JC, Gonzalez E, Morales E, Morales JM, Diaz R, Polo G, Leiva O, Rodicio JL, Praga M. Long-term results of renal transplantation in elderly cadaver donor recipients 65 years old or older. Transplant Proc 2002; 34:356-7. [PMID: 11959323 DOI: 10.1016/s0041-1345(01)02798-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Santamaria H, Manoutcharian K, Rocha L, Gonzalez E, Acero G, Govezensky T, Uribe LI, Olguin A, Paniagua J, Gevorkian G. Identification of peptide sequences specific for serum antibodies from human papillomavirus-infected patients using phage display libraries. Clin Immunol 2001; 101:296-302. [PMID: 11726222 DOI: 10.1006/clim.2001.5126] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Three random phage display peptide libraries were screened with sera from human papillomavirus (HPV)-infected patients to characterize the specificities of antibodies present in patients' sera and to identify molecules that correspond to or mimic natural epitopes; 141 phage clones were randomly selected in three rounds of bioselection and their binding properties were analyzed in ELISA using sera from 36 patients with confirmed HPV 16 infection and 24 healthy control female blood donors. Sixteen of 36 (44%) patients' sera reacted with at least 1 phage clone, and only 2 of 24 female donors' sera showed positive reaction with 1 of the selected clones. We conclude that the combination of various disease-specific epitopes generated by screening of phage display peptide libraries may potentially lead to a multicomponent diagnostic assay for the early detection of HPV infection and precancerous cervical lesions, making possible the prevention of one of the most common cancers in women.
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Scala D, Bracco A, Cozzolino S, Cristinziano A, De Marino C, Di Martino A, Gonzalez E, Mancini A, Romagnuolo F, Zeuli L. Italian drug information centres: benchmark report. PHARMACY WORLD & SCIENCE : PWS 2001; 23:217-23. [PMID: 11826511 DOI: 10.1023/a:1014596024454] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE Pharmacist-operated Drug Information Centres (DICs) in Italy were surveyed to gather current information concerning the status, availability and scope of their services. METHODS 40 DICs were identified and a questionnaire was mailed to them. Topics covered in the questionnaire included staffing, resources, activities and services. The results were compared with previous survey results to identify trends. RESULTS Information from 36 DICs was analysed (response rate = 90%). Almost all regions of the country are represented. Pharmacists, part-time or full-time, are the most frequent employees working in the DICs. 91% of DICs participate in the P/T committee, 74% takes part in the technical scientific committee for clinical experimentation and/or to the Medical Ethics committee and 60% participate in the hospital infection committee. 90% of DICs produce newsletters and/or bulletins and are involved in research projects. Regarding the question-answer service, requests are mainly concerned with clinical comparative efficacy, therapeutic use, adverse effects. The most frequent users are physicians (67%) followed by pharmacists (16%) while other professionals use DICs to lesser extent. The most frequently used information sources, include "Goodman and Gilman's the pharmacological basis of therapeutics", Martindale: the Extra Pharmacopeia and Physician's Desk Reference; journals such as the Medical Letter, Adverse Drug Reactions Bulletin and Drug and Therapeutic Bulletin, Micromedex, Medline and IOWA databases. Data collected through the questionnaire and details about organisation and activity of Italian DICs are available in "Eupharma", the web-site of the Italian Society of Hospital Pharmacy (SIFO) at the URL http://www.sifo.it. CONCLUSION The results parallel the European and American trends. In future communication and collaboration at European level could help to identify best practice models that would result in the standardisation of the activities and in the harmonisation of programs in common areas of interest.
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Gonzalez E, Fougerousse A, Brouillard R. Two diacylated malvidin glycosides from Petunia hybrida flowers. PHYTOCHEMISTRY 2001; 58:1257-1262. [PMID: 11738418 DOI: 10.1016/s0031-9422(01)00280-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Two novel diacylated and two known anthocyanins were isolated from violet flowers of Petunia hybrida cv Festival. The new anthocyanins are malvidin 3-O-(6-O-(4-O-(4-O-(6-O-feruloyl-beta-D-glucopyranosyl)-E-p-coumaroyl)-alpha-rhamnosyl)-beta-D-glucopyranoside)-5-beta-D-glucopyranoside and malvidin 3-O-(6-O-(4-O-(4-O-(6-O-E-p-coumaroyl-beta-D-glucopyranosyl)-E-p-coumaroyl)-alpha-rhamnosyl)-beta-D-glucopyranoside)-5-beta-D-glucopyranoside. The two known pigments are the 3-caffeoylglucosyl-p-coumaroylrutinoside-5-glucosides of malvidin and petunidin.
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Orbay JL, Badia A, Indriago IR, Infante A, Khouri RK, Gonzalez E, Fernandez DL. The extended flexor carpi radialis approach: a new perspective for the distal radius fracture. Tech Hand Up Extrem Surg 2001; 5:204-11. [PMID: 16520583 DOI: 10.1097/00130911-200112000-00004] [Citation(s) in RCA: 103] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
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Lu HC, Gonzalez E, Crair MC. Barrel cortex critical period plasticity is independent of changes in NMDA receptor subunit composition. Neuron 2001; 32:619-34. [PMID: 11719203 DOI: 10.1016/s0896-6273(01)00501-3] [Citation(s) in RCA: 149] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The regulation of NMDA receptor (NMDAR) subunit composition and expression during development is thought to control the process of thalamocortical afferent innervation, segregation, and plasticity. Thalamocortical synaptic plasticity in the mouse is dependent on NMDARs containing the NR2B subunit, which are the dominant form during the "critical period" window for plasticity. Near the end of the critical period there is a gradual increase in the contribution of NR2A subunits that happens in parallel to changes in NMDAR-mediated current kinetics. However, no extension of the critical period occurs in NR2A knockout mice, despite the fact that NMDA subunit composition and current kinetics remain immature past the end of the critical period. These data suggest that regulation of NMDAR subunit composition is not essential for closing the critical period plasticity window in mouse somatosensory barrel cortex.
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Maeso J, Juan J, Escribano J, Allegue NM, Di Matteo A, Gonzalez E, Matas M. Comparison of clinical outcome of stripping and CHIVA for treatment of varicose veins in the lower extremities. Ann Vasc Surg 2001; 15:661-5. [PMID: 11769147 DOI: 10.1007/s10016-001-0009-8] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
The purpose of this nonrandomized case-review study was to compare the outcome of stripping and CHIVA for treatment of varicose veins in the lower extremities in our department. Outcome was evaluated by independent physicians. A total of 85 patients underwent saphenous vein stripping in association with phlebectomy and 90 patients underwent CHIVA cure. The duration of follow-up was 3 years. Study criteria were (1) presence of varicose veins as a cause of failure (1.1% in the CHIVA group vs. 15.3% in the stripping group), (2) appearance of telangiectasia (8.9% in the CHIVA group vs. 65.9% in the stripping group), (3) patient dissatisfaction rate (3.3% in the CHIVA group vs. 16.5% in the stripping group), (4) postoperative symptoms as a cause of failure (1.1% in the CHIVA group vs. 21.2% in the stripping group), and (5) saphenous nerve injury (1 patient in the CHIVA group vs. 16 in the stripping group). Differences between all five criteria were significantly in favor of the CHIVA group as compared to saphenous vein stripping with phlebectomy. Clinical results at 3 years are better for patients treated with CHIVA than stripping with regard to presence of varicose veins, clinical symptoms, presence of telangiectasia, cosmetic satisfaction, and neurologic complications. Data in our series of CHIVA treatments are comparable to those reported in the literature and better than those described in three series of stripping procedures with 3-year follow-up. A prospective randomized study is now underway to confirm these findings.
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Fernandez DL, Capo JT, Gonzalez E. Corrective osteotomy for symptomatic increased ulnar tilt of the distal end of the radius. J Hand Surg Am 2001; 26:722-32. [PMID: 11466650 DOI: 10.1053/jhsu.2001.26033] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Twelve wrists in 10 patients with a mean age of 23.6 years were treated for symptomatic increased ulnar inclination of the joint surface with corrective osteotomy of the radius. Diagnoses included mild ulnar dysplasia, posttraumatic deformity, Madelung's disease, and multiple hereditary exostosis. All patients had radial-sided wrist pain and an ulnarly displaced arc of radioulnar deviation. Preoperative radiographs showed excessive ulnar inclination of the distal radius, ulnar carpal translation, adaptive carpal malalignment, and frequent distal radioulnar joint incongruency. The patients had decreased pain and improved wrist function at a mean of 5.1 years (range, 2-10 years) after surgery. Average radial deviation changed from 3 degrees to 16 degrees and ulnar deviation from 48 degrees to 29 degrees; flexion/extension and pronosupination remained unchanged. Realignment of the wrist was shown radiographically by a change of ulnar inclination of the radius from 33 degrees to 21 degrees, an increase in scaphoid height from 16.4 to 20.4 mm, and reversal of ulnar carpal translation as shown by an increase in lunate-covering ratio of 64% to 77%. Reduction of the ulnar inclination to normal values by corrective radial osteotomy restores a more physiologic range of motion, decreases symptomatic wrist pain, reverts adaptive carpal changes to normal, increases lunate coverage, and may prevent abnormal cartilage overload in the ulnar compartment of the wrist.
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Mangano A, Gonzalez E, Dhanda R, Catano G, Bamshad M, Bock A, Duggirala R, Williams K, Mummidi S, Clark RA, Ahuja SS, Dolan MJ, Bologna R, Sen L, Ahuja SK. Concordance between the CC chemokine receptor 5 genetic determinants that alter risks of transmission and disease progression in children exposed perinatally to human immunodeficiency virus. J Infect Dis 2001; 183:1574-85. [PMID: 11335892 DOI: 10.1086/320705] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2000] [Revised: 03/05/2001] [Indexed: 11/04/2022] Open
Abstract
If CC chemokine receptor 5 (CCR5)-dependent mechanisms at the time of initial virus exposure are important determinants of virus entry and disease outcome, then the polymorphisms in CCR5 that influence risk of transmission and disease progression should be similar; this hypothesis was tested in a cohort of 649 Argentinean children exposed perinatally to human immunodeficiency virus type 1 (HIV-1). Two lines of evidence support this hypothesis. First, CCR5 haplotype pairs associated with enhanced risk of transmission were the chief predictors of a faster disease course. Second, some of the haplotype pairs associated with altered rates of transmission and disease progression in children were similar to those that we previously found influenced outcome in European American adults. This concordance suggests that CCR5 haplotypes may serve as genetic rheostats that influence events occurring shortly after initial virus exposure, dictating not only virus entry but, by extension, also the extent of early viral replication.
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Zibari GB, Boykin KN, Sawaya DE, Abreo KD, Gonzalez E, Gebel HM, McDonald JC. Pancreatic transplantation and subsequent graft surveillance by pancreatic portal-enteric anastomosis and temporary venting jejunostomy. Ann Surg 2001; 233:639-44. [PMID: 11323502 PMCID: PMC1421303 DOI: 10.1097/00000658-200105000-00007] [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: 11/26/2022]
Abstract
OBJECTIVE To evaluate portal-enteric (PE) pancreas and kidney transplantation with venting jejunostomy (VJ) for its efficacy, safety, and reproducibility. SUMMARY BACKGROUND DATA Simultaneous pancreas and kidney transplantation for patients with long-standing insulin-dependent diabetes mellitus that progresses to renal failure has revolutionized their treatment and quality of life. A current clinical focus is to refine the technical aspects of this procedure. Simultaneous pancreas and kidney transplantation with PE anastomosis with VJ appears to offer several advantages over bladder drainage. VJ allows initial decompression of the enteric anastomosis, monitoring of pancreatic function by ostomy amylase, and simple access for endoscopic evaluation and biopsy of the allograft. METHODS Simultaneous pancreas and kidney transplantation with VJ was performed in 21 patients from December 1996 to October 2000 at Willis Knighton/LSU Regional Transplant Center. All patients had long-standing insulin-dependent diabetes mellitus and subsequent renal failure. They were evaluated at the time of surgery by a multidisciplinary transplant team and monitored for numerous factors, including length of hospital stay, immunosuppressive regimen, and ischemia times. All patients had intermittent visual and biochemical evaluation of pancreatic secretions monitored by means of the VJ. RESULTS Of the 21 patients, 10 were women and 11 were men. Four patients were black and 17 were white. The mean age at transplantation was 38 years; average human leukocyte antigen (HLA) match was one; and average cold ischemia time was 12 hours. The median hospital stay was 16 days. Four episodes of postoperative bleeding requiring exploration occurred in four patients. Postoperative wound infections developed in four patients. There were 12 episodes of rejection in nine patients. All patients with suspected acute pancreatic rejection underwent endoscopy by means of the VJ and duodenal biopsy for evaluation. Two patients lost pancreatic function subsequent to kidney failure, one secondary to noncompliance and the other as a result of hemolytic-uremic syndrome. Patient, kidney, and pancreatic survival rates were 100%, 90%, and 90%, respectively. The mean follow-up period was 25 (range 2-48) months. CONCLUSION The authors believe that PE pancreatic drainage with VJ is a more physiologic method to perform pancreatic transplantation than bladder drainage. PE drainage allows rapid diagnosis of acute rejection and anastomotic leak and provides a simple way to monitor ostomy amylase and transplant duodenal bleeding. This technique is safe and has minimal associated complications.
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Gonzalez E, Dhanda R, Bamshad M, Mummidi S, Geevarghese R, Catano G, Anderson SA, Walter EA, Stephan KT, Hammer MF, Mangano A, Sen L, Clark RA, Ahuja SS, Dolan MJ, Ahuja SK. Global survey of genetic variation in CCR5, RANTES, and MIP-1alpha: impact on the epidemiology of the HIV-1 pandemic. Proc Natl Acad Sci U S A 2001; 98:5199-204. [PMID: 11320252 PMCID: PMC33187 DOI: 10.1073/pnas.091056898] [Citation(s) in RCA: 178] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Expression of CC chemokine receptor 5 (CCR5), the major coreceptor for HIV-1 cell entry, and its ligands (e.g., RANTES and MIP-1alpha) is widely regarded as central to the pathogenesis of HIV-1 infection. By surveying nearly 3,000 HIV+ and HIV- individuals from worldwide populations for polymorphisms in the genes encoding RANTES, MIP-1alpha, and CCR5, we show that the evolutionary histories of human populations have had a significant impact on the distribution of variation in these genes, and that this may be responsible, in part, for the heterogeneous nature of the epidemiology of the HIV-1 pandemic. The varied distribution of RANTES haplotypes (AC, GC, and AG) associated with population-specific HIV-1 transmission- and disease-modifying effects is a striking example. Homozygosity for the AC haplotype was associated with an increased risk of acquiring HIV-1 as well as accelerated disease progression in European Americans, but not in African Americans. Yet, the prevalence of the ancestral AC haplotype is high in individuals of African origin, but substantially lower in non-Africans. In a Japanese cohort, AG-containing RANTES haplotype pairs were associated with a delay in disease progression; however, we now show that their contribution to HIV-1 pathogenesis and epidemiology in other parts of the world is negligible because the AG haplotype is infrequent in non-Far East Asians. Thus, the varied distribution of RANTES, MIP-1alpha, and CCR5 haplotype pairs and their population-specific phenotypic effects on HIV-1 susceptibility and disease progression results in a complex pattern of biological determinants of HIV-1 epidemiology. These findings have important implications for the design, assessment, and implementation of effective HIV-1 intervention and prevention strategies.
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Cruz J, Mendez M, Alfonso P, Gonzalez E, Pujol E, Castañon C, Cerezuela P. A phase II study of weekly irinotecan (CPT-11) and oral uracil and ftorafur (UFT) plus folinic acid (FA) as first line treatment in advanced colorectal cancer (CRC). Eur J Cancer 2001. [DOI: 10.1016/s0959-8049(01)81581-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Andrés A, Herrero JC, Praga M, Gonzalez E, Morales JM, Ortiz M, Rodicio JL, Díaz R, Polo G, Leiva O. Double kidney transplant (dual) with kidneys from older donors and suboptimal nephronal mass. Transplant Proc 2001; 33:1166-7. [PMID: 11267240 DOI: 10.1016/s0041-1345(00)02445-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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