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Urraca O, Navarro A, Arellano M, Ruiz L. [Recommendations on medication and breastfeeding]. ANALES ESPANOLES DE PEDIATRIA 2001; 55:581-2. [PMID: 11730599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/17/2023]
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Navarro A, Grisolía S. ATP and other purine nucleotides stimulate the inactivation of ornithine transcarbamylase by broken lysosomes. FEBS Lett 2001; 167:259-62. [PMID: 6559691 DOI: 10.1016/0014-5793(84)80138-6] [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: 11/15/2022]
Abstract
Ornithine transcarbamylase (OTC) is very stable in rat liver homogenates, or mitochondria. However, pure OTC from rat or beef liver is inactivated by broken lysosomes. ATP and a number of purine nucleotides, particularly epsilon-ATP, stimulate the inactivation of OTC by broken lysosomes. Inactivation of OTC by trypsin and elastase is also stimulated by epsilon-ATP. Carbamoyl phosphate protects OTC against proteolytic attack by elastase or by broken lysosomes. Thus, environmental factors, e.g., ATP and carbamoyl phosphate, appear to influence OTC stability to proteases.
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Sandner L, Eguiarte LE, Navarro A, Cravioto A, Souza V. The elements of the locus of enterocyte effacement in human and wild mammal isolates of Escherichia coli: evolution by assemblage or disruption? MICROBIOLOGY (READING, ENGLAND) 2001; 147:3149-58. [PMID: 11700366 DOI: 10.1099/00221287-147-11-3149] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Escherichia coli is an excellent model for studying the evolution of pathogenicity since within one species various genes can be found in pathogenic islands and plasmids causing a wide spectrum of virulence. A collection of 122 strains from different human and wild mammal hosts were analysed by PCR and Southern hybridization for the presence of a subset of the genes included in the LEE (locus of enterocyte effacement). In the PCR analysis, two markers (cesT/eae and espB genes) were found together in more strains (25.4%) than either were found alone. The cesT/eae gene was less frequently found alone (8.2%) than was the espB gene (15.6%). Four regions of the LEE were analysed in a subsample of 25 strains using Southern hybridization. The four regions were all present (44%), all absent (12%) or present in different combinations (44%) in a given strain. The flanking regions of the LEE showed the highest rate of hybridization (in 72% of the strains). The results indicate that the LEE is a dynamic genetic entity, both the complete gene cluster and the individual genes. The genes that comprise this locus seem to be horizontally acquired (or lost) in an independent way and may control other functions in non-pathogenic E. coli lineages. In this way, horizontal transfer may allow the gradual stepwise construction of gene cassettes facilitating coordinate regulation and expression of novel functions.
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Tartari S, Chiodi E, Centanni F, Navarro A. [Abdominal sarcoidosis: report of two cases]. LA RADIOLOGIA MEDICA 2001; 102:417-20. [PMID: 11779998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
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Monasterio C, Vidal S, Duran J, Ferrer M, Carmona C, Barbé F, Mayos M, Gonzalez-Mangado N, Juncadella M, Navarro A, Barreira R, Capote F, Mayoralas LR, Peces-Barba G, Alonso J, Montserrat JM. Effectiveness of continuous positive airway pressure in mild sleep apnea-hypopnea syndrome. Am J Respir Crit Care Med 2001; 164:939-43. [PMID: 11587974 DOI: 10.1164/ajrccm.164.6.2008010] [Citation(s) in RCA: 144] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The aim of this trial was to evaluate the effectiveness of continuous positive airway pressure (CPAP) in patients with mild sleep apnea- hypopnea syndrome (SAHS). One hundred forty-two consecutive patients with mild SAHS (apnea-hypopnea index 10-30, without severe sleepiness) were randomly assigned to receive conservative treatment (CT)-sleep hygiene and weight loss-(65 patients) or CT plus CPAP (77 patients), and 125 patients (86% males, age: 54 +/- 9 yr, BMI: 29 +/- 4 kg/m(2), AHI: 20 +/- 6, ESS: 12 +/- 4) completed the follow-up. The following outcomes were assessed at inclusion and after 3 and 6 mo of treatment: sleepiness (Epworth scale, multiple sleep latency test [MSLT]), other symptoms related to SAHS, cognitive function, and perceived health status (Functional Outcomes of Sleep Questionnaire [FOSQ], Nottingham Health profile). The relief of SAHS-related clinical symptoms was significantly greater in the CPAP group than in the CT group; the Epworth scale and FOSQ also showed more improvement in the CPAP group but did not reach significance. There were no significant differences in the other tests performed probably because the baseline values were normal. CPAP compliance was 4.8 +/- 2.2 h and treatment continuation was accepted by 62% of the patients at the end of the study. These results suggest that CPAP can be considered in treating patients with mild SAHS on the basis of an improvement in symptoms.
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Navarro A, Osella AR, Guerra V, Muñoz SE, Lantieri MJ, Eynard AR. Reproducibility and validity of a food-frequency questionnaire in assessing dietary intakes and food habits in epidemiological cancer studies in Argentina. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2001; 20:365-70. [PMID: 11718216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
A Food-Frequency questionnaire (FFQ) is the method chosen for estimating dietary intake in epidemiological studies because it can provide valid and reliable estimates of usual intake in a variety of populations. Colorectal cancer is associated with diet but no information about validity and reproducibility of dietary exposure assessment is available in Argentina. The purpose of the study is to evaluate the validity and reproducibility of the FFQ used in assessing the relationship between dietary intake and colorectal cancer. Selected nutrient intake, measured by two interviewer-administered FFQs, was compared with average intake derived from using four 24 hour dietary recalls (DR) as the reference method, for 62 control subjects from Córdoba, Argentina. Pearson's product-moment and Spearman correlation coefficients were used. Nutrient intakes were adjusted for energy, sex and age using tertiles of residuals from regression models. Weighted and unweighted kappa statistics were calculated for both FFQs versus DR. The mean correlation coefficients between DR and FFQs were 0.74. Agreement measurement (Kappa) varied from 0.51 to 0.74 for FFQ1 vs. FFQ2 to between 0.71 and 0.87 for FFQ1 and FFQ2. This study demonstrates an acceptable validity and reproducibility for this FFQ. The pattern of the correlation coefficients found in the present study indicates that the FFQ can provide an acceptable assessment of long-term dietary intake in the Argentine population and in other Latin-american areas.
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de Francisco NC, Cantelar B, Chao M, Cabrera N, Navarro A, Naranjo Y. [Common basis of the fundamental subjects of master's programs at Pedro Kourí Tropical Medicine Institute]. REVISTA CUBANA DE MEDICINA TROPICAL 2001; 53:226-8. [PMID: 15846930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
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Navarro A, Utzet F, Puig P, Caminal J, Martín M. [Negative binomial distribution versus Poisson in the analysis of recurrent phenomena]. GACETA SANITARIA 2001; 15:447-52. [PMID: 11734158 DOI: 10.1016/s0213-9111(01)71599-3] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
OBJECTIVE The aim is to unfold the difficulties likely to arise in risk calculations through aggregated database when the studied phenomenon is recurrent and to display the negative binomial distribution as a valid and simple alternative to analyse this kind of phenomenon. METHODS When the studied phenomenon is recurrent, the analysis by means of the Poisson regression can provoke overdispersion or extra-poisson variance, what leads to underestimating the standard errors in coefficients and may divert into the statistical significance of factors which as a matter of fact are not associated with the phenomenon beforehand. The negative binomial can grasp part of the variance which the Poisson is unable to identify. In order to check this out, the fit of both distributions were compared, based on the number of hospitalizations of individuals aged between 65 and 69, during 1996. This comparison was carried out by means of two different aggregated databases: by individuals and by variables. RESULTS There were differences in the fitted models by means of both distributions in both databases. By the analysis of the residuals, when using the base by individuals, the negative binomial fits correctly 67.9% of the observations badly fitted by the Poisson. Using the aggregated variables database, the percentage is 50%. In both cases, Poisson estimates four out of the six studied variables as significant. As to the negative binomial, there are two significant based on individuals and one in the variable database. CONCLUSION The existence of overdispersion is frequent in recurrent-type phenomena. When this occurs, the negative binomial distribution is more appropiate than the Poisson.
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Fustero S, Navarro A, Pina B, Soler JG, Bartolomé A, Asensio A, Simón A, Bravo P, Fronza G, Volonterio A, Zanda M. Enantioselective synthesis of fluorinated alpha-amino acids and derivatives in combination with ring-closing metathesis: intramolecular pi-stacking interactions as a source of stereocontrol. Org Lett 2001; 3:2621-4. [PMID: 11506593 DOI: 10.1021/ol016087q] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text]. Hydride reduction of C=N bonds stereocontrolled by intramolecular pi-stacking interactions of 1-naphthylsulfinyl and N-aryl groups, nonoxidative Pummerer rearrangement, and ring-closing metathesis are efficiently combined in a highly stereoselective entry to enantiomerically pure cyclic and acyclic fluorinated beta-amino alcohols and alpha-amino acid derivatives, respectively.
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Bodí V, Sanchis J, Navarro A, Plancha E, Chorro FJ, Berenguer A, Insa L, Escriche P, Cabadés F, Llácer A. QT dispersion within the first 6 months after an acute myocardial infarction: relationship with systolic function, left ventricular volumes, infarct related artery status and clinical outcome. Int J Cardiol 2001; 80:37-45. [PMID: 11532545 DOI: 10.1016/s0167-5273(01)00452-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
INTRODUCTION We analysed QT dispersion within the first 6 months postinfarction, its relationship with the main established risk stratifiers and its clinical value. METHODS AND RESULTS In 55 patients with a first Q-wave myocardial infarction the 12-lead electrocardiogram was scanned and digitised for analysis of QT dispersion (QT maximum-QT minimum) at first day (72 [61-96] ms), first week (69 [47-90] ms), first month (67 [46-88] ms) and sixth month (47 [40-74] ms; P<0.0001 vs. first day). Cardiac catheterization was performed at first week and at sixth month; QT dispersion was not related to ejection fraction, left ventricular volumes, infarct related artery status or contractile reserve (improvement of the infarcted area with low-dose dobutamine); no relation was found between QT dispersion decrease from first week to sixth month with regional systolic function improvement. Finally, during a mean follow-up period of 35+/-22 months QT dispersion was not independently related to clinical events. CONCLUSION QT dispersion decreases progressively during the first months after myocardial infarction. These changes should be taken into account to define cut-off values of clinical interest in this phase. This variable does not seem related to the classic prognosis predictors. In a nonselected postinfarction population it has a low clinical value.
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Khalili TM, Navarro A, Ting P, Kamohara Y, Arkadopoulos N, Solomon BA, Demetriou AA, Rozga J. Bioartificial liver treatment prolongs survival and lowers intracranial pressure in pigs with fulminant hepatic failure. Artif Organs 2001; 25:566-70. [PMID: 11493278 DOI: 10.1046/j.1525-1594.2001.025007566.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Intracranial hypertension leading to brainstem coning is a major cause of death in fulminant hepatic failure (FHF). We have developed a bioartificial liver (BAL) utilizing plasma perfusion through a bioreactor loaded with porcine hepatocytes and a column with activated charcoal. In a Phase I clinical trial, we observed a decrease in intracranial pressure (ICP) in FHF patients. However, these patients received BAL therapy together with other measures. We therefore examined whether BAL therapy alone could prevent development of intracranial hypertension in pigs with surgically induced FHF. Pigs (40-60 kg) underwent end-to-side portacaval shunt, transection of all hepatic ligaments, and placement of slings around the hepatic artery and bile duct. After 3 days, the slings were tightened to induce liver necrosis. After 4 h, Group 1 pigs (n = 6) underwent a 6 h treatment with the BAL utilizing 10 billion cryopreserved pig hepatocytes and a charcoal column, Group 2 pigs (n = 6) with the BAL containing charcoal but no cells, and Group 3 pigs (n = 6) with the BAL containing neither cells nor charcoal. Group 1 pigs maintained a normal ICP during BAL treatment and for 14 h afterward and because of this effect they survived longer than Groups 2 and 3 animals. In contrast, Groups 2 and 3 pigs showed an early (6-8 h) rise in ICP.
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De La Rubia J, Pérez F, Navarro A. [HELLP syndrome]. Med Clin (Barc) 2001; 117:64-8. [PMID: 11446929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
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Hagan JF, Coleman WL, Foy JM, Goldson E, Navarro A, Tanner JL, Tolmas HC, Armstrong FD, DeMaso DR, Longstaffe S, Gilbertson P, Cohen GJ, Smith K. The prenatal visit. Pediatrics 2001; 107:1456-8. [PMID: 11389276 DOI: 10.1542/peds.107.6.1456] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
In their role as advocates for children and families, pediatricians are in an excellent position to support and guide parents during the prenatal period. Prenatal visits allow the pediatrician to gather basic information from parents, provide information and advice to them, and identify high-risk situations in which parents may need to be referred to appropriate resources for help. In addition, prenatal visits are the first step in establishing a relationship between the pediatrician and parents and help parents develop parenting skills. The prenatal visit may take several possible forms depending on the experience and preferences of the parents, competence and availability of the pediatrician, and provisions of the health care plan.
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Switzer WM, Michler RE, Shanmugam V, Matthews A, Hussain AI, Wright A, Sandstrom P, Chapman LE, Weber C, Safley S, Denny RR, Navarro A, Evans V, Norin AJ, Kwiatkowski P, Heneine W. Lack of cross-species transmission of porcine endogenous retrovirus infection to nonhuman primate recipients of porcine cells, tissues, or organs. Transplantation 2001; 71:959-65. [PMID: 11349732 DOI: 10.1097/00007890-200104150-00022] [Citation(s) in RCA: 78] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Nonhuman primates (NHPs) have been widely used in different porcine xenograft procedures inevitably resulting in exposure to porcine endogenous retrovirus (PERV). Surveillance for PERV infection in these NHPs may provide information on the risks of cross-species transmission of PERV, particularly for recipients of vascularized organ xenografts for whom data from human clinical trials is unavailable. METHODS We tested 21 Old World and 2 New World primates exposed to a variety of porcine xenografts for evidence of PERV infection. These NHPs included six baboon recipients of pig hearts, six bonnet macaque recipients of transgenic pig skin grafts, and nine rhesus macaque and two capuchin recipients of encapsulated pig islet cells. Serologic screening for PERV antibody was done by a validated Western blot assay, and molecular detection of PERV sequences in peripheral blood mononuclear cells (PBMCs) and plasma was performed using sensitive polymerase chain reaction and reverse transcriptase-polymerase chain reaction assays, respectively. Spleen and lymph node tissues available from six bonnet macaques and three rhesus macaques were also tested for PERV sequences. RESULTS All plasma samples were negative for PERV RNA suggesting the absence of viremia in these xenografted animals. Similarly, PERV sequences were not detectable in any PBMC and tissue samples, arguing for the lack of latent infection of these compartments. In addition, all plasma samples were negative for PERV antibodies. CONCLUSION These data suggest the absence of PERV infection in all 23 NHPs despite exposure to vascularized porcine organs or tissue xenografts and the use of immunosuppressive therapies in some animals. These findings suggest that PERV is not easily transmitted to these NHP species through these types of xenografts.
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Sáenz R, Silva C, Navarro A. Ablation with argon plasma coagulator (APC) for Barrett's esophagus. Am J Gastroenterol 2001; 96:1662-3. [PMID: 11374734 DOI: 10.1111/j.1572-0241.2001.03833.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Navarro A, De las Heras B, Villar A. Anti-inflammatory and immunomodulating properties of a sterol fraction from Sideritis foetens Clem. Biol Pharm Bull 2001; 24:470-3. [PMID: 11379762 DOI: 10.1248/bpb.24.470] [Citation(s) in RCA: 90] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A sterol fraction composed of campesterol (7.6%), stigmasterol (28.4%) and beta-sitosterol (61.1%) was obtained by activity-guided fractionation of the acetone extract of Sideritis foetens Clem. This sterol fraction showed anti-inflammatory activity in in vivo murine models of inflammation. It decreased carrageenan paw oedema in mice after oral administration of 30 and 60 mg/kg and inhibited mouse ear oedema induced by 12-O-tetradecanoylphorbol acetate (TPA) after topical application. Quantitation of the neutrophil specific marker myeloperoxidase (MPO) demonstrated that its topical anti-inflammatory activity was associated with reduction in neutrophil infiltration into inflamed tissues. Non-cytotoxic concentrations of the sterol fraction inhibited leukocyte granular enzyme release (beta-glucuronidase) and superoxide generation. However, it did not shown any significant inhibitory effect on histamine release from mast cells. In vitro modulatory activity towards the classical pathway of the complement system shown by this fraction would correlate with the anti-inflammatory profile shown in vivo.
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Navarro A, Sanz F. Chemical Interaction between Nonionic Surfactants and an Acid Dye. J Colloid Interface Sci 2001; 237:1-5. [PMID: 11334507 DOI: 10.1006/jcis.2001.7428] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Complexation of the dye Direct Red 1 with a series of laurylamine surfactants with varying number of ethylene oxide units has been studied by voltammetry. From the measurement of the cathodic current of both dye and surfactant, the stability constants of the established equilibrium between the dye D, the surfactant S, and the dye-surfactant complex D-S can be calculated. The values of the stability constant K at 25 degrees C calculated for a defined dye-surfactant stoichiometry depend on the number of ethylene oxide units incorporated by the surfactant. These constants decrease by one order of magnitude at 60 degrees C maintaining the dependence on the number of ethylene oxide units. Copyright 2001 Academic Press.
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Navarro J, Valdivieso M, Bonet A, Navarro A, Gosalbes V. Oral combination therapy for type 2 diabetes mellitus. Hippokratia 2001. [DOI: 10.1002/14651858.cd003056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Viera Alemán C, Purón E, Hamilton ML, Santos Anzorandia C, Navarro A, Pineda Ortiz I. [Evaluation of motor and sensory neuroconduction of the median nerve in patients with carpal tunnel syndrome treated with non-coherent light emitted by gallium arsenic diodes]. Rev Neurol 2001; 32:717-20. [PMID: 11391505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
INTRODUCTION The treatment selection in the carpal tunnel syndrome according to the damage of the median nerve is important and all of these have adverse effects. A good alternative without undesired reactions is irradiation of the carpal tunnel with not coherent light between 920 and 940 nm emitted by gallium arsenide diodes, resembling the physic and therapeutic laser effects. PATIENTS AND METHODS Twenty-six female patients with idiopathic middle carpal tunnel syndrome were irradiated 15 minutes daily during three weeks. The median nerve motor and sensitive neuroconduction was studied before and immediately after the treatment. RESULTS The abnormal neuroconduction variables (latency, amplitude and velocity conduction) did not modify when treatment concluded, in spite of all the patients reported disappearance of pain and numbness in damaged hands. CONCLUSIONS Not coherent light does not change the fibers functional state explored by conventional neuroconductions techniques. It remains to know if this light produces fine fibers improvement.
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Moreno A, de Felipe J, García Sola R, Navarro A, Ramón y Cajal S. Neuronal and mixed neuronal glial tumors associated to epilepsy. A heterogeneous and related group of tumours. Histol Histopathol 2001; 16:613-22. [PMID: 11332717 DOI: 10.14670/hh-16.613] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The group of brain tumors with mature components encompasses several pathological entities including: the ganglioneuroma; the gangliocytoma; the ganglioglioma; the desmoplastic ganglioglioma; the neurocitoma and a group of glioneuronal hamartomatous tumorous lesions, such as meningoangiomatosis. The dysembryoplastic neuroepithelial tumor is characterized by the presence of multiple cortical nodules made up of small, oligo-like cells and a myxoid pattern rich in mucopolysaccharides. Mature neuronal cells are frequently detected throughout the tumor. Most of them are associated with microhamartias in the adjacent brain and pharmacoresistant epilepsy. The excellent prognosis of the majority of these tumors and the potential for malignant transformation of the glial component in the ganglioglioma are the two most remarkable findings. Histological signs of anaplasia and greater mitotic and proliferative activities are associated with local recurrences. Atypical neurocytomas occur only exceptionally. Treatment choices are surgical resectioning and, in those cases presenting greater proliferative activity and cytological atypia, postoperative radiotherapy may be recommended. This paper reviews this heterogeneous group of neoplasms and hamartomatous lesions, pointing out presumable transitions among the different types of mixed neuronal and glial brain tumors. A single term of "mixed neuronal-glial tumors" is defended, distinguishing different subgroups of tumors, depending on the predominant cellular component.
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Dominguez G, Silva JM, Silva J, Garcia JM, Sanchez A, Navarro A, Gallego I, Provencio M, España P, Bonilla F. Wild type p73 overexpression and high-grade malignancy in breast cancer. Breast Cancer Res Treat 2001; 66:183-90. [PMID: 11510689 DOI: 10.1023/a:1010624717311] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The overexpression of wild type p73 is the most frequent alteration of p73 in malignancies. We investigated, in 70 breast carcinomas, p73 mRNA expression and its relationship to p53 mutations, determined by an immunohistochemical method, and loss heterozygosity (LOH) status of the 1p36 region, together with its possible implication in the pathogenesis of breast carcinomas. LOH, amplifying DNA by PCR using 5 markers, of 1p36 region (one intragenic to p73 gene) was found in 17% of cases but no significant correlation was observed with p73 overexpression. p53 positive immunostaining was present in 33% of breast carcinomas, and these exhibited a statistically significant relation with p73 overexpressed tumors. Overexpression of p73 mRNA was observed in 19 tumors (27%). The analysis of cases with p73 overexpression and cases with normal mRNA expression, in terms of age and pathologic characteristics of the tumors showed a significant association of p73 overexpression and tumors with lymph node metastases, vascular invasion and higher pathologic stage. These results suggest that p73 overexpression is a molecular alteration that could be implicated in the tumorigenesis of breast carcinomas and, eventually, in a poor clinical behavior.
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Bodí V, Sanchis J, Chorro FJ, Berenguer A, Navarro A, Cabadés F, Escriche P, Llàcer A. ST-segment elevation on Q-leads during exercise in patients with ST-segment elevation at rest after myocardial infarction. Int J Cardiol 2001; 78:41-9. [PMID: 11259812 DOI: 10.1016/s0167-5273(00)00477-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
INTRODUCTION ST-segment elevation on Q-leads after an acute myocardial infarction is related to a greater infarct size. The meaning of a further exercise-induced ST-segment elevation in these patients has not been analyzed. METHOD Thirty-six patients with ST-segment elevation on Q-leads were studied after a first acute myocardial infarction. Exercise testing and cardiac catheterization were performed at the first week. Left ventricular volumes (ml/m(2)); the extent of abnormal wall motion (AWM: chords); contractile reserve (AWM improvement with low dose dobutamine) and coronary patency in the culprit artery were analyzed. Cardiac catheterization was repeated at the sixth month in 20 patients; systolic recovery (AWM improvement), left ventricular volumes and coronary patency were again evaluated. RESULTS Patients with exercise-induced ST-segment elevation in two or more Q-leads (n=21) showed lesser contractile reserve (6+/-6 vs. 12+/-7 chords, P=0.01) than patients without exercise-induced ST-segment elevation (n=13). AWM (F=8.1) and absence of exercise-induced ST-segment elevation (F=9.5; positive predictive value: 80%; negative predictive value: 68%) were the only independent predictors of contractile reserve. Nevertheless, this electrocardiographic sign was not related to left ventricular volumes, coronary patency or systolic function and it did not predicted late systolic recovery. CONCLUSIONS In patients with baseline ST-segment elevation on Q-leads an exercise-induced ST-segment elevation is independently related to a lesser contractile reserve but not to the evolution of volumes or regional dysfunction during the first 6 months post-infarction. Therefore, the clinical value of this sign seems to be limited to the non-invasive detection of myocardial viability during the early post-infarction phase.
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Valero R, Cabrer C, Oppenheimer F, Trias E, Sánchez-Ibáñez J, De Cabo FM, Navarro A, Paredes D, Alcaraz A, Gutiérrez R, Manyalich M. Normothermic recirculation reduces primary graft dysfunction of kidneys obtained from non-heart-beating donors. Transpl Int 2001; 13:303-10. [PMID: 10959484 DOI: 10.1007/s001470050706] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Our aim was to analyze the short- and long-term function of kidneys procured from non- heartbeating donors (NHBD) by means of three techniques: in situ perfusion (ISP), total body cooling (TBC) and normothermic recirculation (NR). Fifty-seven potential NHBD were included. Mean warm ischemia time was 68.9 +/- 35.6 min. Forty-four kidneys were obtained from donors perfused with ISP, 8 with TBC, and 8 with NR. Eighteen kidneys (32%) started functioning immediately, 29 (52%) showed delayed graft function (DGF) and 9 (16%) showed primary non function (PNF). The actuarial graft survival rate was 76.4% at 1 year and 56% at 5 years. The patient survival rate was 89.3% at 5 years. Incidence of DGF and PNF was significantly lower in kidneys perfused with NR than those with ISP or TBC (P < 0.01). Duration of DGF was shorter in kidneys obtained through TBC than in kidneys obtained with ISP (P < 0.05). In conclusion, NR reduces the incidence of DGF and may be considered the method of choice for kidney procurement from NHBD.
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Navarro A, Cristaldo PE, Díaz MP, Eynard AR. [Food photography atlas: its suitability for quantifying food and nutrient consumption in nutritional epidemiological research in Córdoba, Argentina]. REVISTA DE LA FACULTAD DE CIENCIAS MÉDICAS 2001; 57:67-74. [PMID: 11188856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023] Open
Abstract
UNLABELLED Food pictures are suitable visual tools for quantize food and nutrient consumption avoiding bias due to self-assessments. OBJECTIVE To determine the perception of food portion size and to establish the efficacy of food pictures for dietaries assessments. MATERIAL AND METHODS A food frequency questionnaire (FFQ) including 118 food items of daily consumption was applied to 30 adults representative of Córdoba, Argentina, population. Among several food models (paper maché, plastics) and pictures, those which more accurately filled the purpose were selected. 3 small, median and large standard portion size were determined. Data were evaluated with descriptive statistics tools and Chi square adherence test. RESULTS The assessment of 51 percent of the food was assayed in concordance with the reference size. In general, the remainder was overestimated. The 90 percent of volunteers concluded that the pictures were the best visual resource. CONCLUSIONS The photographic atlas of food is an useful material for quantize the dietary consumption, suitable for many types of dietaries assessments. In conclusion, comparison among pictures of three portions previously standardized for each food is highly recommendable.
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