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Espinosa S, Cortés R, Toro-Ibacache V. Single photon emission computed tomography (SPECT) diagnostic accuracy in active unilateral condylar hyperplasia: Retrospective study. J Craniomaxillofac Surg 2023; 51:467-474. [PMID: 37550116 DOI: 10.1016/j.jcms.2023.07.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 05/30/2023] [Accepted: 07/30/2023] [Indexed: 08/09/2023] Open
Abstract
The aim of this study was to assess the diagnostic accuracy of single photon emission tomography (SPECT) in unilateral condylar hyperplasia (UCH). To this end, 3D morphometric changes of the mandibles in one year were assessed (T0 vs. T1) and compared over SPECT results in T1, in a sample of 40 patients. A contingency table was constructed based on these results for SPECT diagnostic accuracy evaluation, classifying patients as SPECT true-positive, true-negatives, false positives and false-negatives. Additionally, the morphometric analysis was used to describe the presentation of mandibular changes using principal component analysis (PCA) and non-parametric statistics. We obtained diagnostic accuracy results of sensitivity 81%, specificity 63%, positive predictor value (PPV) 59%, negative predictor value (NPV) 83% and accuracy 70%, showing that SPECT yields poor results regarding accuracy diagnostic performance. The morphometric analysis showed that individuals without progress of asymmetry and those with more progress differ particularly in a group of landmarks representing the mental region and the right mandibular body. Based on these landmarks, difference among the four SPECT-accuracy groups was statistically significant (p < 0.001), where the landmark showing the largest change within a year had a mean increase of 1.13 + 0.66 mm. Within the limitations of the study, it seems that SPECT alone is not suitable for making surgical decisions regarding condylectomy in active UCH. Follow up with morphological assessment methods are recommended for confirming an active UCH in combination with SPECT.
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Affiliation(s)
- S Espinosa
- Department of Oral and Maxillofacial Surgery, Hospital Sótero del Río, Santiago, Chile; Department of Oral and Maxillofacial Surgery, Clinica Indisa, Santiago, Chile.
| | - R Cortés
- Department of Oral Rehabilitation, Faculty of Dentistry, University of Chile, Santiago, Chile
| | - V Toro-Ibacache
- Laboratory for Craniofacial Research and Institute for Research in Dental Sciences, Faculty of Dentistry, University of Chile, Santiago, Chile; Department of Maxillofacial Surgery, Hospital Clínico San Borja Arriarán, Santiago, Chile
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Espinosa S, Bec N, Larroque C, Ramírez J, Sgorbini B, Bicchi C, Cumbicus N, Gilardoni G. A Novel Chemical Profile of a Selective In Vitro Cholinergic Essential Oil from Clinopodium taxifolium (Kunth) Govaerts (Lamiaceae), a Native Andean Species of Ecuador. Molecules 2020; 26:E45. [PMID: 33374888 PMCID: PMC7795002 DOI: 10.3390/molecules26010045] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 12/18/2020] [Accepted: 12/20/2020] [Indexed: 01/24/2023] Open
Abstract
A novel chemical profile essential oil, distilled from the aerial parts of Clinopodium taxifolium (Kunth) Govaerts (Lamiaceae), was analysed by Gas Chromatography-Mass Spectrometry (GC-MS, qualitative analysis) and Gas Chromatography with Flame Ionization Detector (GC-FID, quantitative analysis), with both polar and non-polar stationary phase columns. The chemical composition mostly consisted of sesquiterpenes and sesquiterpenoids (>70%), the main ones being (E)-β-caryophyllene (17.8%), α-copaene (10.5%), β-bourbonene (9.9%), δ-cadinene (6.6%), cis-cadina-1(6),4-diene (6.4%) and germacrene D (4.9%), with the non-polar column. The essential oil was then submitted to enantioselective GC analysis, with a diethyl-tert-butyldimethylsilyl-β-cyclodextrin diluted in PS-086 chiral selector, resulting in the following enantiomeric excesses for the chiral components: (1R,5S)-(-)-α-thujene (67.8%), (1R,5R)-(+)-α-pinene (85.5%), (1S,5S)-(-)-β-pinene (90.0%), (1S,5S)-(-)-sabinene (12.3%), (S)-(-)-limonene (88.1%), (S)-(+)-linalool (32.7%), (R)-(-)-terpinen-4-ol (9.3%), (S)-(-)-α-terpineol (71.2%) and (S)-(-)-germacrene D (89.0%). The inhibition activity against acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) of C. taxifolium essential oil was then tested, resulting in selective activity against BChE with an IC50 value of 31.3 ± 3.0 μg/mL (positive control: donepezil, IC50 = 3.6 μg/mL).
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Affiliation(s)
- Sandra Espinosa
- Departamento de Química y Ciencias Exactas, Universidad Técnica Particular de Loja, Loja 1101608, Ecuador; (S.E.); (C.L.); (J.R.)
| | - Nicole Bec
- IRMB, Université de Montpellier, INSERM, 34298 Montpellier, France;
| | - Christian Larroque
- Departamento de Química y Ciencias Exactas, Universidad Técnica Particular de Loja, Loja 1101608, Ecuador; (S.E.); (C.L.); (J.R.)
- Supportive Care Unit, Institut du Cancer de Montpellier (ICM), 34298 Montpellier, France
| | - Jorge Ramírez
- Departamento de Química y Ciencias Exactas, Universidad Técnica Particular de Loja, Loja 1101608, Ecuador; (S.E.); (C.L.); (J.R.)
| | - Barbara Sgorbini
- Dipartimento di Scienza e Tecnologia del Farmaco, Università degli Studi di Torino, 10125 Torino, Italy; (B.S.); (C.B.)
| | - Carlo Bicchi
- Dipartimento di Scienza e Tecnologia del Farmaco, Università degli Studi di Torino, 10125 Torino, Italy; (B.S.); (C.B.)
| | - Nixon Cumbicus
- Departamento de Ciencias Biológicas, Universidad Técnica Particular de Loja (UTPL), Loja 1101608, Ecuador;
| | - Gianluca Gilardoni
- Departamento de Química y Ciencias Exactas, Universidad Técnica Particular de Loja, Loja 1101608, Ecuador; (S.E.); (C.L.); (J.R.)
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Poveda Pinedo I, Marco Clement I, Gonzalez O, Ponz I, Iniesta A, Pena L, Rodriguez M, Hernandez M, Arranz H, Araujo A, Marin M, Espinosa S, Dalmau R, Castro A, Lopez Sendon J. PETCO2 gradient: a novel prognostic parameter in cardiopulmonary exercise testing. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Previous parameters such as peak VO2, VE/VCO2 slope and OUES have been described to be prognostic in heart failure (HF). The aim of this study was to identify further prognostic factors of cardiopulmonary exercise testing (CPET) in HF patients.
Methods
A retrospective analysis of HF patients who underwent CPET from January to November 2019 in a single centre was performed. PETCO2 gradient was defined by the difference between final PETCO2 and baseline PETCO2. HF events were defined as decompensated HF requiring hospital admission or IV diuretics, or decompensated HF resulting in death.
Results
A total of 64 HF patients were assessed by CPET, HF events occurred in 8 (12.5%) patients. Baseline characteristics are shown in table 1. Patients having HF events had a negative PETCO2 gradient while patients not having events showed a positive PETCO2 gradient (−1.5 [IQR −4.8, 2.3] vs 3 [IQR 1, 5] mmHg; p=0.004). A multivariate Cox proportional-hazards regression analysis revealed that PETCO2 gradient was an independent predictor of HF events (HR 0.74, 95% CI [0.61–0.89]; p=0.002). Kaplan-Meier curves showed a significantly higher incidence of HF events in patients having negative gradients, p=0.002 (figure 1).
Conclusion
PETCO2 gradient was demonstrated to be a prognostic parameter of CPET in HF patients in our study. Patients having negative gradients had worse outcomes by having more HF events.
Time to first event, decompensated heart
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
| | | | - O Gonzalez
- University Hospital La Paz, Madrid, Spain
| | - I Ponz
- University Hospital La Paz, Madrid, Spain
| | | | - L Pena
- University Hospital La Paz, Madrid, Spain
| | | | | | - H Arranz
- University Hospital La Paz, Madrid, Spain
| | - A Araujo
- University Hospital La Paz, Madrid, Spain
| | - M Marin
- University Hospital La Paz, Madrid, Spain
| | - S Espinosa
- University Hospital La Paz, Madrid, Spain
| | - R Dalmau
- University Hospital La Paz, Madrid, Spain
| | - A Castro
- University Hospital La Paz, Madrid, Spain
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Cedeño H, Espinosa S, Andrade JM, Cartuche L, Malagón O. Novel Flavonoid Glycosides of Quercetin from Leaves and Flowers of Gaiadendron punctatum G.Don. (Violeta de Campo), used by the Saraguro Community in Southern Ecuador, Inhibit α-Glucosidase Enzyme. Molecules 2019; 24:molecules24234267. [PMID: 31771116 PMCID: PMC6930599 DOI: 10.3390/molecules24234267] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 11/13/2019] [Accepted: 11/18/2019] [Indexed: 12/14/2022] Open
Abstract
Gaiadandendron punctatum G.Don. (violeta de campo) is a plant used in traditional medicine by the Saraguro people, an ancient indigenous group that lives in southern Ecuador. From samples collected in the region, six glycoside flavonoids, five with quercetin and one with kaempferol as aglycon, were isolated and characterized from hydroalcoholic extracts of leaves and flowers. Rutin (2) was found in flowers and leaves, nicotiflorin (1) was found in flowers, artabotryside A (3) was found in leaves, and three novel quercetin flavonoid glycosides were isolated, elucidated, and characterized via 1D and 2D NMR experiments (1H, 13C, COSY, DEPT, HMBC, HSQC, TOCSY, NOESY, ROESY), acid hydrolysis–derivatization–GC-MS analysis, HPLC-MS, IR, UV, and optical rotation. The new quercetin flavonoid glycosides were named hecpatrin (4) (isolated from leaves), gaiadendrin (5) (isolated from leaves), and puchikrin (6) (isolated from flowers). The hydroalcoholic extracts of the leaves presented antimicrobial activity against Micrococcus luteus, Staphylococcus aureus, and Enterococcus faecalis and the hydroalcoholic extract of the flowers was active against Micrococcus luteus. However, glycoside flavonoids presented scarce antimicrobial activity against bacteria. Hydroalcoholic extracts from leaves and flowers and their secondary metabolites showed inhibition against the α-glucosidase enzyme at different concentrations. Rutin, gaiadendrin, and nicotiflorin showed competitive α-glucosidase inhibition, while hecpatrin presented non-competitive inhibition.
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Dalmau R, Velez A, Rivas A, Irazusta J, Araujo A, Espinosa S, Castro A. Smoking cessation after acute myocardial infarction, is relapse predictable? Tob Prev Cessat 2018. [DOI: 10.18332/tpc/90406] [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: 11/24/2022]
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Arderiu G, Espinosa S, Peña E, Crespo J, Aledo R, Bogdanov VY, Badimon L. Tissue factor variants induce monocyte transformation and transdifferentiation into endothelial cell-like cells. J Thromb Haemost 2017; 15:1689-1703. [PMID: 28585414 DOI: 10.1111/jth.13751] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Indexed: 11/29/2022]
Abstract
Essentials Monocytes (Mo) transdifferentiate into endothelial cell-like (ECL) cells. Mo induce tissue factor (TF) expression and secretion in microvascular endothelial cells (mECs). TF interacts with Mo in a paracrine fashion, inducing their transdifferentiation into ECL cells. TF generates a positive feedback crosstalk between Mo and mECs that promotes angiogenesis. SUMMARY Background Monocytes (Mo) increase neovascularization by releasing proangiogenic mediators and/or transdifferentiating into endothelial cell-like (ECL) cells. Recently, we have reported that Mo-microvascular endothelial cells (mECs) crosstalk induces mEC-tissue factor (TF) expression and promotes angiogenesis. However, the effect of TF on Mo remains unknown. Objective Here, we analyzed whether TF might exert angiogenic effects by inducing transdifferentiation of Mo. Methods Full-length TF (flTF) and alternatively spliced TF (asTF) were overexpressed in mECs, and their supernatants were added to Mo cultures. CD16 positivity and expression of vascular endothelial cell (VEC) markers in Mo were analyzed by fluorescence activated cell sorting. The capacity to form tube-like structures were visualized in three-dimensional cultures. Results In mECs flTF and asTF expression and release were increased in cultures with Mo-conditioned media. TF variants induced expansion of a CD16+ Mo subset and Mo transdifferentiation into ECL-cells expressing VEC markers that can form new microvessels. CD16+ Mo exposed to TF showed an increased expression of VE-cadherin, von Willebrand factor (VWF) and eNOS. Mo cultured with supernatants obtained from TF-silenced mECs did not transdifferentiate to ECL-cells or expressed VEC markers. Blocking β1-integrin in Mo significantly blocked the effects of the TF variants. Conclusions Mo induce mECs to express and release TF, which drives CD16- Mo to transform into CD16+ Mo and to transdifferentiate into ECL-cells that can form new microvessels. Our results reveal a TF-mediated positive feedback between mECs and Mo that stimulates Mo differentiation and induces angiogenesis.
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Affiliation(s)
- G Arderiu
- Cardiovascular Science Institute-ICCC, Hospital de Sant Pau (UAB) and IIB-Sant Pau, Barcelona, Spain
| | - S Espinosa
- Cardiovascular Science Institute-ICCC, Hospital de Sant Pau (UAB) and IIB-Sant Pau, Barcelona, Spain
| | - E Peña
- Cardiovascular Science Institute-ICCC, Hospital de Sant Pau (UAB) and IIB-Sant Pau, Barcelona, Spain
- Ciber CV, Instituto Carlos III, Madrid, Spain
| | - J Crespo
- Cardiovascular Science Institute-ICCC, Hospital de Sant Pau (UAB) and IIB-Sant Pau, Barcelona, Spain
| | - R Aledo
- Cardiovascular Science Institute-ICCC, Hospital de Sant Pau (UAB) and IIB-Sant Pau, Barcelona, Spain
| | - V Y Bogdanov
- Division of Hematology/Oncology, Department of Internal Medicine, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - L Badimon
- Cardiovascular Science Institute-ICCC, Hospital de Sant Pau (UAB) and IIB-Sant Pau, Barcelona, Spain
- Ciber CV, Instituto Carlos III, Madrid, Spain
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Ariza S, Espinosa S, Naranjo M. Nonsurgical Therapies for Basal Cell Carcinoma: A Review. Actas Dermosifiliogr 2017; 108:809-817. [PMID: 28433227 DOI: 10.1016/j.ad.2017.01.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Revised: 01/25/2017] [Accepted: 01/27/2017] [Indexed: 01/09/2023] Open
Abstract
Basal cell carcinoma (BCC) is the most prevalent malignant tumor in humans and the local destruction of tissue that can result from excision has a significant impact on well-being. Treating BCC is costly for health care systems given the high incidence of this tumor, especially in older patients. Standard treatment involves either resection with histologic assessment of margins or Mohs micrographic surgery. Surgery is sometimes contraindicated, however, due to the presence of significant comorbidity or high cosmetic expectations. For such patients, nonsurgical treatments have become available. These alternatives can offer good local control of disease, preserve function, and achieve excellent cosmetic results.
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Affiliation(s)
- S Ariza
- Servicio de Dermatología, Hospital San José, Fundación Universitaria de Ciencias de la Salud, FUCS, Bogotá, Colombia
| | - S Espinosa
- Servicio de Dermatología, Hospital San José, Fundación Universitaria de Ciencias de la Salud, FUCS, Bogotá, Colombia.
| | - M Naranjo
- Servicio de Dermatología, Hospital San José, Fundación Universitaria de Ciencias de la Salud, FUCS, Bogotá, Colombia
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Da Costa Martins PA, Vitale S, Arderiu G, Juni R, Duygu B, Bitsch N, De Windt LJ, Bettini M, Marchetti MC, Ciliberti G, Coiro S, Zuchi C, Migliorati G, Tritto I, Riccardi C, Ambrosio G, Espinosa S, Pena E, Crespo J, Bogdanov VY, Badimon L. Microvascular Angina: Diagnosis and Treatment Particularities61MicroRNA-216a: a cardiac-specific post-transcriptional regulator of capillary rarefaction associated with heart failure62Divergent effects of pre- and post-conditioning on microvascular function63Tissue factor variants induce monocyte mobilization and transdifferentiation into endothelial-like cells that promote angiogenesis. Cardiovasc Res 2016. [DOI: 10.1093/cvr/cvw131] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Espinosa S, Arderiu G, Aledo R, Pena E, Badimon L. 549Monocytes activate the non-canonical Wnt5a pathway in microvascular endothelial cells and induce tissue factor expression and tube formation. Cardiovasc Res 2014. [DOI: 10.1093/cvr/cvu096.1] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Badimon L, Espinosa S, Arderiu G, Aledo R, Peña E. C0230: Monocytes Through Wnt Signaling Trigger Tissue Factor Expression in Microvascular Endothelial Cells During Tube Formation. Thromb Res 2014. [DOI: 10.1016/s0049-3848(14)50113-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Raeissi S, Diaz S, Espinosa S, Peters C, Brignole E. Ethane as an alternative solvent for supercritical extraction of orange peel oils. J Supercrit Fluids 2008. [DOI: 10.1016/j.supflu.2008.01.008] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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del Cerro MJ, Fernández A, Espinosa S, Benito F, Burgueros M, García-Guereta L, Rubio D, Deiros L, Castro C, Cabo J, Borches D, Aroca Á. Cateterismo intervencionista tras cirugía tipo Norwood. Rev Esp Cardiol 2008. [DOI: 10.1157/13116202] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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del Cerro MJ, Fernández A, Espinosa S, Benito F, Burgueros M, García-Guereta L, Rubio D, Deiros L, Castro C, Cabo J, Borches D, Aroca A. [Interventional catheterization after the Norwood procedure]. Rev Esp Cardiol 2008; 61:146-153. [PMID: 18364183] [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: 05/26/2023]
Abstract
INTRODUCTION AND OBJECTIVES To carry out a retrospective analysis of the indications for, and the results and complications of interventional catheterization after the Norwood procedure. METHODS Between February 1993 and December 2006, 25 interventional catheterizations were performed in 14 patients who had undergone the Norwood procedure, prior to the Glenn or Fontan procedure. RESULTS Nine angioplasties were carried out for recoarctation in seven of the 14 patients (2 patients developed restenosis after their first angioplasty). Detachment of the left pulmonary artery occurred either immediately or during follow-up in 3 patients who underwent the classical Norwood procedure. Overall, 10 pulmonary artery angioplasties were required in 7 patients. Three patients needed embolization: one of venous collaterals (using coils), one of the left superior vena cava (using an Amplatzer duct occluder), and one of a left Blalock-Taussig shunt (using an Amplatzer duct occluder). Two patients required a cavopulmonary (Glenn) anastomosis, and another underwent fibrinolysis for thrombosis of the superior vena cava and pulmonary artery. Other findings, which were not treated percutaneously, included: stenosis of the supra-aortic trunk (n=6), femoral artery stenosis (n=2), femoral vein thrombosis (n=5), and subclavian vein thrombosis (n=1). The following complications were recorded: arterial ischemia (n=2), cardiac arrest or bradycardia (n=4), and transient atrioventricular block (n=1). CONCLUSIONS Following stage I of the Norwood procedure, the angiographic and hemodynamic assessments needed for the diagnosis and treatment of pulmonary artery or aortic arch stenosis must be carried out promptly. Although treating recoarctation by angioplasty can be effective, restenosis frequently occurs. With the Sano procedure, detachment of the left pulmonary artery, but not pulmonary artery stenosis, can be avoided. After stage II, the presence of venovenous collaterals must be ruled out, because they frequently require embolization. In these patients, interventional catheterization is associated with a higher incidence of complications than in other groups.
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Affiliation(s)
- María J del Cerro
- Servicio de Cardiología Pediátrica, Hospital Infantil La Paz, Madrid, España.
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Solís M, Ramírez-Mendoza H, Mercado C, Espinosa S, Vallejo V, Reyes-Leyva J, Hernández J. Semen alterations in porcine rubulavirus-infected boars are related to viral excretion and have implications for artificial insemination. Res Vet Sci 2007; 83:403-9. [PMID: 17368687 DOI: 10.1016/j.rvsc.2007.01.018] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2006] [Revised: 01/26/2007] [Accepted: 01/29/2007] [Indexed: 11/21/2022]
Abstract
Porcine rubulavirus (PoRV), also known as blue eye disease (BED) of swine, causes respiratory and reproductive problems in pigs at several developmental stages. To study the effect of PoRV infection on semen production, five boars were infected with 1 x 10(6) TCID(50)/ml of PoRV strain PAC-3 and evaluated for 59 days post inoculation (DPI). Infected boars developed reproductive tract pathology that included swelling of the testes and epididymides. Analysis of the semen showed that the infection had little effect on semen production in four animals, but semen from one boar showed severe alterations in sperm concentration, motility, and morphology. When motility was analyzed in BTS-diluted semen after 24, 48, or 72 h, alterations were detected in all boars. Furthermore, viral antigen was detected in semen, the seminal plasma fraction, or sperm fraction from all boars. These results showed that PoRV is excreted via semen and, therefore, artificial insemination is a potential route of dissemination.
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Affiliation(s)
- M Solís
- Departamento de Producción Animal, Cerdos, FMVZ-UNAM, Cd. Universitaria, Mexico, D.F. 04510, Mexico
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Bermúdez-Cañete R, Pérez-Ibarra D, Herráiz-Sarachaga I, Espinosa S, Sánchez J. Utilidad del stent recubierto en 2 casos de cardiopatía congénita complicada con aneurismas vasculares. Rev Esp Cardiol (Engl Ed) 2005. [DOI: 10.1157/13078136] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Bermúdez-Cañete R, Pérez-Ibarra D, Herráiz-Sarachaga I, Espinosa S, Sánchez J. [Use of coated stents in two patients with congenital heart defects and secondary vascular aneurysms]. Rev Esp Cardiol 2005; 58:979-83. [PMID: 16053833] [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: 05/03/2023]
Abstract
The formation of an aneurysm in the aorta or pulmonary artery is a dangerous potential complication of surgical and angioplasty procedures involving these vessels. Treatment using covered stents has emerged as an effective alternative to surgery and the use of conventional stents. The authors report on 2 patients who were treated successfully by the implantation of covered stents in the aorta and pulmonary artery following angioplasty and surgery, respectively. We discuss the mechanisms of aneurysm formation and the efficacy and limitations of using covered stents in such patients.
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Affiliation(s)
- Ramón Bermúdez-Cañete
- Unidad de Hemodinámica y Cardiología Intervencionista Pediátrica, Hospital Ramón y Cajal, Madrid, Spain.
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Melián-Cabrera I, Espinosa S, García-Montelongo FJ, Kapteijn F, Moulijn JA. Ion exchanged Fe-FER through H2O2-assisted decomplexation of organic salts. Chem Commun (Camb) 2005:1525-7. [PMID: 15770247 DOI: 10.1039/b417776b] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Decomplexation of organic ligands through redox titration has been applied to catalyst synthesis, developing an improved preparation method for Fe-ferrierite (Fe-FER), the catalyst showing excellent performance and durability for N2O decomposition under realistic conditions for nitric acid plants.
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Affiliation(s)
- I Melián-Cabrera
- R&CE, DelftChemTech, Delft University of Technology, Julianalaan 136, 2628 BL, Delft, The Netherlands.
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Espinosa S, Diaz S, Brignole EA. Thermodynamic Modeling and Process Optimization of Supercritical Fluid Fractionation of Fish Oil Fatty Acid Ethyl Esters. Ind Eng Chem Res 2002. [DOI: 10.1021/ie010470h] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Valkó K, Espinosa S, Du CM, Bosch E, Rosés M, Bevan C, Abraham MH. Unique selectivity of perfluorinated stationary phases with 2,2,2-trifluoroethanol as organic mobile phase modifier. J Chromatogr A 2001; 933:73-81. [PMID: 11758748 DOI: 10.1016/s0021-9673(01)01254-7] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [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: 10/27/2022]
Abstract
The selectivity of Luna C18 Xterra C18 and Fluophase (perfluorinated C6) stationary phases has been investigated with aqueous acetonitrile, methanol and 2,2,2-trifluoroethanol mobile phases using linear solvation equations. The gradient retention times of a set of 60 compounds with known molecular descriptors have been determined. Linear solvation equations have been set up to describe the relationship between the gradient retention times and the molecular properties. The selectivity of the stationary phase/mobile phase systems was characterised by the regression coefficients of the molecular descriptors. The perfluorinated stationary phase showed very different selectivity using 2,2,2-trifluoroethanol (TFE) as co-solvent. Compounds with H-bond donor functionality were retained much less than in the other investigated high-performance liquid chromatography (HPLC) systems. This unique selectivity can be explained by the stronger adsorption of trifluoroethanol on the perfluorinated stationary phase surface, than on the hydrocarbon surface. It suggests the importance of the adsorbed organic modifiers in the separation mechanism during reversed-phase HPLC.
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Affiliation(s)
- K Valkó
- Computational, Analytical and Structural Sciences, GlaxoSmithKline, Stevenage, UK. .
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Margolis-Clark E, Hunt I, Espinosa S, Bowman BJ. Identification of the gene at the pmg locus, encoding system II, the general amino acid transporter in Neurospora crassa. Fungal Genet Biol 2001; 33:127-35. [PMID: 11456465 DOI: 10.1006/fgbi.2001.1273] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Mutations at the pmg locus in Neurospora crassa cause a deficiency in a transport system for a broad range of amino acids. We have isolated a gene that encodes a protein with a high degree of sequence similarity to the GAP1 general amino acid permease in Saccharomyces cerevisiae. Our data indicate that this is the gene at the pmg locus. It encodes a 572-residue protein with a molecular mass of 62,649 Da. The predicted secondary structure has 12 membrane-spanning regions, a feature characteristic of a superfamily of permease proteins. Inactivation of the gene yielded a mutant strain with the same phenotype as the pmg- strain, and a cosmid containing a functional copy of the gene rescued the pmg- strain. Although the pmg- strain has previously been assayed in a genetic background that contains mutations in genes for two other amino acid transport systems, we have found conditions in which the pmg- strain has an identifiable phenotype in an otherwise wild-type genetic background.
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Affiliation(s)
- E Margolis-Clark
- Department of Molecular, Cell, and Developmental Biology, University of California, Santa Cruz, CA 95064, USA
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Espinosa S, Bottini SB, Brignole EA. Process Analysis and Phase Equilibria for the Removal of Chemicals from Fatty Oils Using Near-Critical Solvents. Ind Eng Chem Res 2000. [DOI: 10.1021/ie000014d] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- S. Espinosa
- Planta Piloto de Ingenieria Quimica, PLAPIQUI (UNS-CONICET), Camino La Carrindanga Km 7, CC 717, 8000 Bahía Blanca, Argentina
| | - S. B. Bottini
- Planta Piloto de Ingenieria Quimica, PLAPIQUI (UNS-CONICET), Camino La Carrindanga Km 7, CC 717, 8000 Bahía Blanca, Argentina
| | - E. A. Brignole
- Planta Piloto de Ingenieria Quimica, PLAPIQUI (UNS-CONICET), Camino La Carrindanga Km 7, CC 717, 8000 Bahía Blanca, Argentina
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Diaz S, Espinosa S, Brignole E. Modeling and simulation tools for supercritical fluid processes. ACTA ACUST UNITED AC 2000. [DOI: 10.1016/s1570-7946(00)80055-3] [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: 02/19/2023]
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Abstract
In this study, cultures of human lymphocytes were exposed for 48 h to aqueous suspensions of Zinalco, with different times of corrosion, to test the biocompatibility of this alloy and support its use in medical implants. The results show that the Zinalco concentrations assessed affect the mitotic index (MI) and some also increase the length of DNA migration measured in the comet assay in a significant manner; none of them showed clastogenic nor aneugenic effects. The authors conclude that Zinalco may be considered as an alternative biomaterial and suggest its use for short-term implants.
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Affiliation(s)
- M de los Angeles Aguilar
- Departamento de Ciencias de la Salud, Universidad Autónoma Metropolitana-Iztapalapa, Mexico, D.F., Mexico.
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