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Pereira A, Araújo R, Favorito S, Bertolla P, Lallo M. Ocorrência de microsporídios em pequenos mamíferos silvestres no Estado de São Paulo. ARQ BRAS MED VET ZOO 2009. [DOI: 10.1590/s0102-09352009000600035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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277
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Borges CM, Candoso F, Ferreira HL, Nogueira DS, Pereira A, Reis E. Implementation of a complexity classification system for inpatient rehabilitation facilities for financing purposes - comparing scales. BMC Health Serv Res 2009. [PMCID: PMC2773578 DOI: 10.1186/1472-6963-9-s1-a3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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278
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Pereira A, Rawson J, Jakubowska A, Clarke IJ. Estradiol-17beta-responsive A1 and A2 noradrenergic cells of the brain stem project to the bed nucleus of the stria terminalis in the ewe brain: a possible route for regulation of gonadotropin releasing hormone cells. Neuroscience 2009; 165:758-73. [PMID: 19857554 DOI: 10.1016/j.neuroscience.2009.10.027] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2009] [Revised: 10/13/2009] [Accepted: 10/14/2009] [Indexed: 11/16/2022]
Abstract
We have studied brain stem cells in the ewe brain that project to the bed nucleus of the stria terminalis (BNST) and determined if these cells are activated by estradiol-17beta. This would predicate an indirect role in the estradiol-17beta regulation of gonadotropin releasing hormone (GnRH) cells, since these receive input from the BNST. Ovariectomized ewes received 50 mug estradiol-17beta benzoate (i.m.) 1 h prior to brain collection, so that activated cells could be identified by Fos immunohistochemistry. Retrograde tracer (FluoroGold; FG), was injected into the three divisions of the BNST and labeled cells were mapped to the A1 and A2 regions and the parabrachial nucleus (PBN) of the brain stem. With FG injection into the dorsal and lateral BNST, all FG-containing cells in the caudal A1 and 45% of those in A2 stained for dopamine-beta-hydroxylase (DBH), indicating noradrenergic type. No FG-labelled cells in the PBN were DBH-positive. In A1 and A2 respectively, 42% and 46% of FG-labelled cells were Fos-positive, with no double-labeling in cells of the PBN. In ewes receiving FG injections into the ventral BNST, estrogen receptor (ER)alpha-immunoreactive nuclei were found in 82% of A1-FG labeled and 38% of A2-FG labeled cells. No FG-labelled cells of the PBN were ERalpha-positive. Anterograde tracing from A1 with microruby injection identified projections to the PBN, BNST and preoptic area (POA). Thus, A1 and A2 noradrenergic neurons project to the BNST in the ewe brain, express ERalpha and are activated by estradiol-17beta. These noradrenergic, estrogen-responsive cells may provide indirect input to GnRH cells, via the BNST.
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Bien-Aimé K, Pereira A, Belin C, Gallais L, Grua P, Tovena-Pecault I, Néauport J, Fargin E. Impact of outgassing organic contamination on laser induced damage of optics. ACTA ACUST UNITED AC 2009. [DOI: 10.1117/12.836384] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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280
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Abreu A, Alves J, Pereira A, Karakashev D, Alves M, Angelidaki I. Engineered heat treated methanogenic granules (EHTG): a promising biotechnological approach for high rate extreme thermophilic (70°C) biohydrogen production in expanded granular sludge bed (EGSB) reactors. N Biotechnol 2009. [DOI: 10.1016/j.nbt.2009.06.558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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281
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Pereira A, Machado P, Araújo A, Coelho A, Teixeira A, Medeiros R. 9059 8473T>C COX-2 polymorphism and susceptibility for lung cancer: a strategy for individualised chemoprevention. EJC Suppl 2009. [DOI: 10.1016/s1359-6349(09)71772-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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282
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Guerra AS, Ramos L, Fonseca S, Ferreira J, Casal D, Silva R, Rasteiro D, Caiado C, Moniz P, Fradinho N, Pereira A, Mouzinho M, Antunes P. Dermal regeneration template for lower extremity burns. Burns 2009. [DOI: 10.1016/j.burns.2009.06.093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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283
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Lebrun I, Marques-Porto R, Pereira AS, Pereira A, Perpetuo EA. Bacterial toxins: an overview on bacterial proteases and their action as virulence factors. Mini Rev Med Chem 2009; 9:820-8. [PMID: 19519507 DOI: 10.2174/138955709788452603] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Bacterial pathogenicity is a result of a combination of factors, including resistance to environmental threats and to the host's defenses, growth capability, localization in the host, tissue specificity, resource obtaining mechanisms and the bacterium's own defenses to aggression. A variety of bacterial components, often specific to each strain, are involved in the microorganism's survival, adhesion and growth in the host. Many of them are harmful and, therefore, are called virulence factors. The effects caused by the virulence factors determine the degree of aggressivity of the strain. In many cases the virulence factors are secreted proteins or enzymes, sometimes performing very specific functions. The enzymatic activity is directed to specific proteins from cell membranes, synaptic vesicle fusion proteins, among other important targets. One of the most toxic bacterial proteins is secreted by Clostridium botulinum, targeted to synaptic vesicle fusion proteins, cleaving them with a zinc-metalloprotease activity, which results in severe neurotoxic effects with a lethal dose as low as eight nanograms per kilogram of body weight. The tetanus neurotoxin acts in a similar way but is less active and Bacillus anthracis also presents a potent metalloprotease activity. In this work we describe a selection of these specially interesting and important bacterial proteins and proteases, stressing their relevance in the pathological process and in medical studies.
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Lamy E, da Costa G, Santos R, Capela E Silva F, Potes J, Pereira A, Coelho AV, Sales Baptista E. Sheep and goat saliva proteome analysis: a useful tool for ingestive behavior research? Physiol Behav 2009; 98:393-401. [PMID: 19615390 DOI: 10.1016/j.physbeh.2009.07.002] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2008] [Revised: 06/25/2009] [Accepted: 07/08/2009] [Indexed: 01/22/2023]
Abstract
Sheep and goats differ in diet selection, which may reflect different abilities to deal with the ingestion of plant secondary metabolites. Although saliva provides a basis for immediate oral information via sensory cues and also a mechanism for detoxification, our understanding of the role of saliva in the pre-gastric control of the intake of herbivores is rudimentary. Salivary proteins have important biological functions, but despite their significance, their expression patterns in sheep and goats have been little studied. Protein separation techniques coupled to mass spectrometry based techniques have been used to obtain an extensive comprehension of human saliva protein composition but far fewer studies have been undertaken on animals' saliva. We used two-dimensional electrophoresis gel analysis to compare sheep and goats parotid saliva proteome. Matrix-assisted laser desorption ionization-time of flight (MALDI-TOF) and liquid chromatography tandem mass spectrometry (LC-MS/MS) were used to identify proteins. From a total of 260 sheep and 205 goat saliva protein spots, 117 and 106 were identified, respectively. A high proportion of serum proteins were found in both salivary protein profiles. Major differences between the two species were detected for proteins within the range of 25-35 kDa. This study presents the parotid saliva proteome of sheep and goat and highlights the potential of proteomics for investigation relating to intake behavior research.
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Rivera J, Roig MJS, Monteagudo J, Pereira A, Moraleda JM, Reverter JC, Vicente V. Absence of Effect of DDAVP Infusion on Platelet Glycoprotein Ib/IX and IIb/IIIa Complexes, and their Interaction with Newly Released von Willebrand Factor. Platelets 2009; 4:219-24. [DOI: 10.3109/09537109309013221] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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286
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Wald RM, Redington AN, Pereira A, Provost YL, Paul NS, Oechslin EN, Silversides CK. Right ventricular outflow tract obstruction should be considered in assessing influence of pulmonary regurgitation on right ventricular volumes: reply. Eur Heart J 2009. [DOI: 10.1093/eurheartj/ehp231] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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287
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Pereira A, Martinez T, Vieira L. Abstract: P1282 CHOLESTEROL – A EPIDEMIOLOGICAL STUDY IN CHILDREN AND ADOLESCENTS. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)71299-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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288
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Pereira A, Martinez T, Sposito A, Nascimento H. Abstract: P806 EVALUATION OF PROTEIN C HIGHLY SENSITIVE CHILDREN AND ADOLESCENTS IN MUNICIPALITY OF ITAPETININGA-BRAZIL. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)70961-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Pereira A, Guedes A, Verreschi I, Santos R, Martinez T. Abstract: P1252 OBESITY AND ITS ASSOCIATION WITH CARDIOVASCULAR RISK FACTORS IN SCHOOLCHILDREN FROM BRAZIL. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)71269-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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290
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Castro R, Vega J, Pereira A, Portas A. Data distribution architecture based on standard real time protocol. FUSION ENGINEERING AND DESIGN 2009. [DOI: 10.1016/j.fusengdes.2008.12.074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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291
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Zuttin R, Rebelo A, Catai A, Moreno M, Tamburús N, Souza R, Santos M, Kunz V, Salviati M, Pereira A, Zamunér A, Sakabe D, Neves V, Silva E. RELATIONSHIP OF AGE AND THE AUTONOMIC MODULATION OF HEART RATE (HR) BETWEEN WOMEN. Maturitas 2009. [DOI: 10.1016/s0378-5122(09)70246-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Pereira A, Pirraco R, Viterbo T, Gomes L, Borges Pereira F, Salgado L, Carvalho L, Trigo L, Lencart J. 107 poster: Comparative Study Between CT Image-Based and Orthogonal Image Based Dosimetry for Uterovaginal Brachytherapy Treatments. Radiother Oncol 2009. [DOI: 10.1016/s0167-8140(15)34364-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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293
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294
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Singh T, Schroeder F, Pereira A, Bhide A. Antenatal blood patch in a pregnant woman with spontaneous intracranial hypotension. Int J Obstet Anesth 2009; 18:165-8. [DOI: 10.1016/j.ijoa.2008.09.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2008] [Revised: 09/12/2008] [Accepted: 09/15/2008] [Indexed: 11/28/2022]
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Pereira A, Fink G, Sundram S. Clozapine-induced ERK1 and ERK2 signaling in prefrontal cortex is mediated by the EGF receptor. J Mol Neurosci 2009; 39:185-98. [PMID: 19277491 DOI: 10.1007/s12031-009-9188-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2008] [Accepted: 02/16/2009] [Indexed: 10/21/2022]
Abstract
The atypical antipsychotic drug clozapine is effective in treatment-refractory schizophrenia. The intracellular signaling pathways that mediate clozapine action remain unknown. A potential candidate is the mitogen-activated protein kinase extracellular signal-regulated kinase (MAPK-ERK) cascade that links G-protein-coupled receptor and ErbB growth factor signaling systems, thereby regulating synaptic plasticity and connectivity, processes impaired in schizophrenia. Here, we examined how clozapine differentially modulated phosphorylation of the MAPK isoforms, ERK1/ERK2 in primary murine prefrontal cortical neurons compared to the typical antipsychotic drug haloperidol. While clozapine and haloperidol acutely decreased cortical pERK1 activation, only clozapine but not haloperidol stimulated pERK1 and pERK2 with continued drug exposure. This delayed ERK increase however, did not occur via the canonical dopamine D(2)-Gi/o-PKA or serotonin 5HT(2A)-Gq-phospholipase-C-linked signaling pathways. Rather, epidermal growth factor (EGF) receptor signaling mediated clozapine-induced ERK activation, given dose-dependent reduction of pERK1 and pERK2 stimulation with the EGF receptor inhibitor, AG1478. Immunocytochemical studies indicated that clozapine treatment increased EGF receptor (Tyr1068) phosphorylation. In vivo mouse treatment studies supported the in vitro findings with initial blockade, subsequent activation, and normalization of the cortical ERK response over 24 h. Furthermore, in vivo clozapine-induced ERK activation was significantly reduced by AG1478. This is the first report that clozapine action on prefrontal cortical neurons involves the EGF signaling system. Since EGF receptor signaling has not been previously linked to antipsychotic drug action, our findings may implicate the EGF system as a molecular substrate in treatment-resistant schizophrenia.
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Pereira A. Efficacy of different plasma sources in the treatment of thrombotic thrombocytopenic purpura. ACTA ACUST UNITED AC 2009. [DOI: 10.1111/j.1751-2824.2009.01219.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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297
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Mendonça MI, Reis RP, Sousa AC, Gomes S, Faria P, Pereira A, Silva B, Serrão M, Santos N, Sousa FS, Silva JA, Sousa J, Ornelas I, Freitas S, Cardoso A, Araújo JJ. Pulse wave velocity and coronary risk stratification. Rev Port Cardiol 2009; 28:155-171. [PMID: 19438151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
Abstract
BACKGROUND Arterial compliance or stiffness is an important determinant of cardiovascular disease and there is considerable interest in its noninvasive measurement. Pulse wave velocity (PWV) is widely used as an index of arterial stiffness. AIM To determine whether PWV is useful for risk stratification in both healthy individuals and coronary patients. METHODS Control subjects, n=510, aged 46.1 +/- 11 years, with no history of coronary disease, were selected from electoral rolls, and coronary patients, n=301, aged 53.7 +/- 10 years, were selected from hospital patients with a history of coronary artery disease (CAD) confirmed by coronary angiogram (at least 75% obstruction of one of the main coronary vessels). The asymptomatic subjects without CAD formed Group A, and were subdivided into A1 (without hypertension, dyslipidemia and/or diabetes) and A2 (with hypertension, dyslipidemia and/or diabetes). The coronary patients formed Group B, who were also subdivided into B1, without these classic risk factors, and B2 with hypertension, dyslipidemia and/or diabetes. We used the Student's t test to compare continuous variables and the chi-square test to compare categorical data. The strength of correlation between continuous variables was tested by Pearson's linear correlation. Independent variables predictive of CAD were determined by backward logistic regression analysis. The statistical analysis was performed using SPSS for Windows version 11.0 and data were expressed as means +/- SD; a p value of 0.05 was considered significant. RESULTS Comparing the two groups A1 and A2, mean PWV was significantly lower in group A1. Comparing B1 and B2, mean PWV was also significantly lower in group B1. In group A1, PWV was significantly and positively correlated with age, body mass index, waist-to-hip ratio, alcohol consumption, total/HDL cholesterol ratio, systolic, diastolic and mean blood pressure (BP), blood glucose, apo B, triglycerides, and high-sensitivity C-reactive protein, unlike HDL which was inversely correlated (Pearson's coefficient). In group A2, PWV was significantly and positively correlated with age, alcohol consumption, total/HDL cholesterol ratio, systolic, diastolic and mean BP, blood glucose and pulse pressure (PP), but not HDL, which was inversely correlated with PWV. In group B1, PWV was only significantly and positively correlated with age, systolic, mean, and diastolic BP and PP, and presented a significant inverse correlation with ejection fraction. However, in the high-risk coronary population (group B2), there was a positive correlation with age, waist-to-hip ratio, systolic and mean BP, PP and homocysteine. After stepwise logistic regression, PWV remained in the model and proved to be a significant and independent risk factor for CAD. CONCLUSION The results of our study show that PWV is higher in high-risk groups and significantly correlated with many classic and new CAD risk markers, suggesting that there is a cumulative influence of risk factors in the development of arterial stiffness. We believe that PWV is a useful index of vascular status and hence cardiovascular risk and that it may be useful for risk stratification in both asymptomatic and coronary patients.
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Candeias MF, Abreu P, Pereira A, Cruz-Morais J. Effects of strictosamide on mouse brain and kidney Na+, K+-ATPase and Mg2+-ATPase activities. JOURNAL OF ETHNOPHARMACOLOGY 2009; 121:117-122. [PMID: 18992802 DOI: 10.1016/j.jep.2008.08.032] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2004] [Revised: 07/31/2008] [Accepted: 08/01/2008] [Indexed: 05/27/2023]
Abstract
Present study reports on the general bioactivity of strictosamide and on its effects on Na(+),K(+)-ATPase and Mg(2+)-ATPase activities of Charles River male mouse. Strictosamide is the main glycoalkaloid of Sarcocephalus latifolius (Rubiaceae) leaves and roots, used as medicinal plant in folk medicine. In this work, we studied the in vitro effects of various concentrations of strictosamide (0.25, 0.5, 1 or 2 mg/mL) and the in vivo effects of single doses (50, 100 or 200 mg/kg, i.p.) of this compound on kidney and brain Na(+),K(+)-ATPase and Mg(2+)-ATPase activities. Results of general study showed that strictosamide is slightly toxic to Charles River mouse (LD(50)=723.17 mg/kg), producing CNS depression and kidney toxicity, but the exact mechanism of these effects could not be defined. Strictosamide inhibited the in vitro and in vivo Mg(2+)-ATPase activity on kidney but had nonsignificant effect on brain. Furthermore, strictosamide had nonsignificant in vitro and in vivo effect on kidney Na(+),K(+)-ATPase activity but produced an in vivo increase of Na(+),K(+)-ATPase activity of brain, these findings suggesting that strictosamine may be related to the induction of alpha(2) isoform of Na(+),K(+)-ATPase and may account for the folk use of Sarcocephalus latifolius root infusion on hypertension.
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Aguiar AP, Almeida J, Bayat M, Cardeira B, Cunha R, Häusler A, Maurya P, Oliveira A, Pascoal A, Pereira A, Rufino M, SebastiÃo L, Silvestre C, Vanni F. Cooperative Control of Multiple Marine Vehicles Theoretical Challenges and Practical Issues. ACTA ACUST UNITED AC 2009. [DOI: 10.3182/20090916-3-br-3001.0072] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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300
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Thayil AKN, Pereira A, Mathew M, Artigas D, Blanco EM, Loza-Alvarez P. Decrease in laser ablation threshold for epithelial tissue microsurgery in a living Drosophila embryo during dorsal closure. J Microsc 2008; 232:362-8. [PMID: 19017235 DOI: 10.1111/j.1365-2818.2008.02107.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
In this work, we use a two-photon fluorescence microscope for combined imaging and laser tissue ablation of a living Drosophila Melanogaster embryo. By using tightly focused near-infrared femtosecond pulses at MHz repetition rate and of sub-nanojoule energy we are able to produce microsurgery on the epithelial tissue within a Drosophila embryo at the final stages of its embryonic development. Ablation was performed on labelled and unlabelled embryos during and after dorsal closure. We observed that ablation of GFP-labelled tissue required lower energy deposition than unlabelled tissue ensuring that the tissue ablation is mediated by multiphoton absorption of Green Fluorescent Protein (GFP). In addition, the energy deposition to produce ablation is further decreased during dorsal closure. These results show the presence of additional tensile forces on the tissue during dorsal closure. Furthermore, an increased activity of actin near the laser wounds was observed as the tissue heals.
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