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Schroeder B, Vander Steen T, Espinoza I, Venkatapoorna CMK, Hu Z, Silva FM, Regan K, Cuyàs E, Meng XW, Verdura S, Arbusà A, Schneider PA, Flatten KS, Kemble G, Montero J, Kaufmann SH, Menendez JA, Lupu R. Fatty acid synthase (FASN) regulates the mitochondrial priming of cancer cells. Cell Death Dis 2021; 12:977. [PMID: 34675185 PMCID: PMC8531299 DOI: 10.1038/s41419-021-04262-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 09/12/2021] [Accepted: 09/24/2021] [Indexed: 12/24/2022]
Abstract
Inhibitors of the lipogenic enzyme fatty acid synthase (FASN) have attracted much attention in the last decade as potential targeted cancer therapies. However, little is known about the molecular determinants of cancer cell sensitivity to FASN inhibitors (FASNis), which is a major roadblock to their therapeutic application. Here, we find that pharmacological starvation of endogenously produced FAs is a previously unrecognized metabolic stress that heightens mitochondrial apoptotic priming and favors cell death induction by BH3 mimetic inhibitors. Evaluation of the death decision circuits controlled by the BCL-2 family of proteins revealed that FASN inhibition is accompanied by the upregulation of the pro-death BH3-only proteins BIM, PUMA, and NOXA. Cell death triggered by FASN inhibition, which causally involves a palmitate/NADPH-related redox imbalance, is markedly diminished by concurrent loss of BIM or PUMA, suggesting that FASN activity controls cancer cell survival by fine-tuning the BH3 only proteins-dependent mitochondrial threshold for apoptosis. FASN inhibition results in a heightened mitochondrial apoptosis priming, shifting cells toward a primed-for-death state "addicted" to the anti-apoptotic protein BCL-2. Accordingly, co-administration of a FASNi synergistically augments the apoptosis-inducing activity of the dual BCL-XL/BCL-2 inhibitor ABT-263 (navitoclax) and the BCL-2 specific BH3-mimetic ABT-199 (venetoclax). FASN inhibition, however, fails to sensitize breast cancer cells to MCL-1- and BCL-XL-selective inhibitors such as S63845 and A1331852. A human breast cancer xenograft model evidenced that oral administration of the only clinically available FASNi drastically sensitizes FASN-addicted breast tumors to ineffective single-agents navitoclax and venetoclax in vivo. In summary, a novel FASN-driven facet of the mitochondrial priming mechanistically links the redox-buffering mechanism of FASN activity to the intrinsic apoptotic threshold in breast cancer cells. Combining next-generation FASNis with BCL-2-specific BH3 mimetics that directly activate the apoptotic machinery might generate more potent and longer-lasting antitumor responses in a clinical setting.
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Affiliation(s)
- Barbara Schroeder
- Division of Experimental Pathology, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, 55905, USA.,Mayo Clinic Cancer Center, Rochester, MN, 55905, USA.,Helmholtz Pioneer Campus, Heimholtz Zentrum München, Deutsches Forschungszentrum für Gesundheit und Umwelt (GmbH), Ingolstädter Landstraße 1 D-85764 Neuherberg, Munich, Germany
| | - Travis Vander Steen
- Division of Experimental Pathology, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, 55905, USA
| | - Ingrid Espinoza
- Department of Preventive Medicine, John D. Bower School of Population Health, University of Mississippi Medical Center, Jackson, MS, 39216, USA.,Cancer Institute, School of Medicine, University of Mississippi Medical Center, Jackson, MS, 39216, USA
| | - Chandra M Kurapaty Venkatapoorna
- Division of Experimental Pathology, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, 55905, USA.,Department of Nutrition, Dietetics, and Hospital Management, Auburn University, Auburn, AL, 36849, USA
| | - Zeng Hu
- Division of Experimental Pathology, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, 55905, USA.,Radiation Oncology Research, Mayo Clinic, Rochester, MN, 55905, USA
| | - Fernando Martín Silva
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology (BIST), 08028, Barcelona, Spain
| | - Kevin Regan
- Department of Experimental Pathology, Mayo Clinic, Rochester, MN, 55905, USA
| | - Elisabet Cuyàs
- Girona Biomedical Research Institute, 17190, Salt, Girona, Spain.,Program Against Cancer Therapeutic Resistance (ProCURE), Metabolism & Cancer Group, Catalan Institute of Oncology, 17007, Girona, Spain
| | - X Wei Meng
- Deparment of Oncology, Mayo Clinic, Rochester, MN, 55905, USA
| | - Sara Verdura
- Girona Biomedical Research Institute, 17190, Salt, Girona, Spain.,Program Against Cancer Therapeutic Resistance (ProCURE), Metabolism & Cancer Group, Catalan Institute of Oncology, 17007, Girona, Spain
| | - Aina Arbusà
- Girona Biomedical Research Institute, 17190, Salt, Girona, Spain.,Program Against Cancer Therapeutic Resistance (ProCURE), Metabolism & Cancer Group, Catalan Institute of Oncology, 17007, Girona, Spain
| | | | - Karen S Flatten
- Deparment of Oncology, Mayo Clinic, Rochester, MN, 55905, USA
| | - George Kemble
- Sagimet Biosciences (formerly 3-V Biosciences), San Mateo, CA, 94402, USA
| | - Joan Montero
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology (BIST), 08028, Barcelona, Spain
| | - Scott H Kaufmann
- Mayo Clinic Cancer Center, Rochester, MN, 55905, USA.,Deparment of Oncology, Mayo Clinic, Rochester, MN, 55905, USA
| | - Javier A Menendez
- Department of Experimental Pathology, Mayo Clinic, Rochester, MN, 55905, USA. .,Girona Biomedical Research Institute, 17190, Salt, Girona, Spain.
| | - Ruth Lupu
- Division of Experimental Pathology, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, 55905, USA. .,Mayo Clinic Cancer Center, Rochester, MN, 55905, USA. .,Department of Biochemistry and Molecular Biology Laboratory, Mayo Clinic Laboratory, Rochester, MN, 55905, USA.
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Gottschall C, Tarnowski M, Machado P, Raupp D, Marcadenti A, Rabito EI, Silva FM. Predictive and concurrent validity of the Malnutrition Universal Screening Tool using mid-upper arm circumference instead of body mass index. J Hum Nutr Diet 2019; 32:775-780. [PMID: 31067603 DOI: 10.1111/jhn.12665] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
BACKGROUND Considering the difficulty in obtaining weight and height measurements of patients at hospital admission, the Malnutrition Universal Screening Tool (MUST) proposes the use of mid-upper arm circumference (MUAC) instead of body mass index (BMI) as an alternative for screening of malnutrition risk. The present study aimed to evaluate the performance of MUST with MUAC in place of BMI to identify nutritional risk and predict prolonged hospitalisation and mortality in hospitalised patients. METHODS The prospective cohort study involved ambulant patients aged ≥18 years who were admitted to the emergency department of a public hospital. A questionnaire concerning clinical and socio-demographic data was applied and anthropometric measurements were performed (weight, height, BMI and MUAC). Nutritional risk screening was performed using the original MUST (BMI) and MUST-MUAC tools. The outcomes were length of hospital stay and death. RESULTS Seven hundred and fifty-two patients were included and followed-up for 13.5 (interquartile range 3.00-19.00) days. The frequency of patients at nutritional risk was higher according to MUST-MUAC (48.9%) compared to the original MUST (37.1%). MUST-MUAC showed concurrent validity, demonstrating good agreement with the original MUST (k = 0.690), high sensitivity (95.3%) and accuracy (area under the curve = 0.868; 95% confidence interval = 0.841-0.895) with respect to identifying nutritional risk. The presence of nutritional risk detected by the MUST-MUAC increased the chance of prolonged hospital stay by 1.9 (95% CI. 1.4-2.7)-fold and mortality by 3.2 (95% CI. 1.1-9.4)-fold. CONCLUSIONS MUST-MUAC showed satisfactory concurrent and predictive validity. Considering that MUAC measurement is easier to perform than BMI, the MUST-MUAC should be used for screening of nutritional risk in hospitalised patients.
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Affiliation(s)
- C Gottschall
- Nutrition Science Post-graduation Program, Federal University of Health Sciences of Porto Alegre (UFCSPA), Porto Alegre, Brazil
| | - M Tarnowski
- Nutrition Science Post-graduation Program, Federal University of Health Sciences of Porto Alegre (UFCSPA), Porto Alegre, Brazil
| | - P Machado
- Nutrition Science Post-graduation Program, Federal University of Health Sciences of Porto Alegre (UFCSPA), Porto Alegre, Brazil
| | - D Raupp
- Nutrition Science Post-graduation Program, Federal University of Health Sciences of Porto Alegre (UFCSPA), Porto Alegre, Brazil
| | - A Marcadenti
- Nutrition Science Post-graduation Program, Federal University of Health Sciences of Porto Alegre (UFCSPA), Porto Alegre, Brazil.,Institute of Research of the Heart Hospital (IP-HCOR), São Paulo, Brazil.,Health Science, Cardiology, Institute of Cardiology/University Foundation of Cardiology (IC/FUC), Porto Alegre, Brazil
| | - E I Rabito
- Food and Nutrition Post-graduation Program, Federal University of Paraná, Curitiba, Brazil
| | - F M Silva
- Nutrition Science Post-graduation Program, Federal University of Health Sciences of Porto Alegre (UFCSPA), Porto Alegre, Brazil
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Oliveira Filho PA, Cruz FGG, Rufino JPF, Silva EM, Viana Filho GB, Silva FM. Requirement of Digestible Methionine + Cystine to Molted Laying Hens. Braz J Poult Sci 2019. [DOI: 10.1590/1806-9061-2019-1076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
| | - FGG Cruz
- Federal University of Amazonas, Brazil
| | | | - EM Silva
- Federal University of Amazonas, Brazil
| | | | - FM Silva
- Federal University of Amazonas, Brazil
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Raupp D, Silva FM, Marcadenti A, Rabito EI, da Silva Fink J, Becher P, Gottschall C. Nutrition screening in public hospital emergency rooms: Malnutrition Universal Screening Tool and Nutritional Risk Screening-2002 can be applied. Public Health 2018; 165:6-8. [PMID: 30339907 DOI: 10.1016/j.puhe.2018.07.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [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: 05/24/2017] [Revised: 04/13/2018] [Accepted: 07/07/2018] [Indexed: 01/04/2023]
Abstract
OBJECTIVE To evaluate the agreement between two nutritional screening tools (Malnutrition Universal Screening Tool [MUST] and Nutritional Risk Screening-2002 [NRS-2002]) and Subjective Global Assessment (SGA) to identify nutritional risk in patients admitted to public emergency rooms. STUDY DESIGN Cross-sectional study. METHODS Patients aged ≥18 years who were admitted to an emergency room of a tertiary public hospital were evaluated. A nutritional risk assessment was performed in the first 48 h following hospital admission, through MUST, NRS-2002, and SGA. The Cohen's kappa coefficient was calculated. RESULTS The study included 577 patients, with an average age of 53.9 ± 15.8 years; 56% of whom were women. Prevalence of nutritional risk was 35.3% and 28.5% according to MUST and NRS-2002, respectively, and malnutrition prevalence was equal to 32.9% according to SGA. The Cohen's kappa coefficient between SGA and MUST was 0.67 and between SGA and NRS-2002 was 0.62. CONCLUSION MUST and NRS-2002 showed good agreement with SGA in identification of nutritional risk, suggesting that both tools have similar applicability for nutritional screening in adults or older patients admitted to public emergency rooms.
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Affiliation(s)
- D Raupp
- Nutrition Department, Federal University of Health Sciences of Porto Alegre (UFCSPA) Porto Alegre, Brazil
| | - F M Silva
- Nutrition Department, Federal University of Health Sciences of Porto Alegre (UFCSPA) Porto Alegre, Brazil; Postgraduate Program in Nutrition Sciences, Federal University of Health Sciences of Porto Alegre (UFCSPA), Porto Alegre, Rio Grande do Sul, Brazil
| | - A Marcadenti
- Postgraduate Program in Nutrition Sciences, Federal University of Health Sciences of Porto Alegre (UFCSPA), Porto Alegre, Rio Grande do Sul, Brazil; Postgraduate Program in Health Sciences: Cardiology, Institute of Cardiology/University Foundation of Cardiology (IC/FUC), Porto Alegre, Rio Grande do Sul, Brazil; Institute of Research of Heart Hospital (HCor), São Paulo, Brazil
| | - E I Rabito
- Nutrition Department, Food and Nutrition Graduate Program, Federal University of Paraná (UFPR), Curitiba, Brazil
| | - J da Silva Fink
- Nutrition and Dietetic Service, Hospital Nossa Senhora da Conceição, Porto Alegre, Brazil
| | - P Becher
- Nutrition Department, Federal University of Health Sciences of Porto Alegre (UFCSPA) Porto Alegre, Brazil
| | - C Gottschall
- Nutrition Department, Federal University of Health Sciences of Porto Alegre (UFCSPA) Porto Alegre, Brazil; Postgraduate Program in Nutrition Sciences, Federal University of Health Sciences of Porto Alegre (UFCSPA), Porto Alegre, Rio Grande do Sul, Brazil.
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Pereira EM, Silva FM, Val BHP, Pizolato Neto A, Mauro AO, Martins CC, Unêda-Trevisoli SH. Canonical correlations between agronomic traits and seed physiological quality in segregating soybean populations. Genet Mol Res 2017; 16:gmr-16-02-gmr.16029547. [PMID: 28407185 DOI: 10.4238/gmr16029547] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 11/03/2022]
Abstract
The objective of this study was to evaluate the relationship between agronomic traits and physiological traits of seeds in segregating soybean populations by canonical correlation analysis. Seven populations and two commercial cultivars in three generations were used: F3 plants and F4 seeds; F4 plants and F5 seeds, and F4 seeds and plants. The following agronomic traits (group I) were evaluated: number of days to maturity, plant height at maturity, insertion height of first pod, number of pods, grain yield, and oil content. The physiological quality of seeds (group II) was evaluated using germination, accelerated aging, emergence, and emergence rate index tests. The results showed that agronomic traits and physiological traits of seeds are not independent. Intergroup associations were established by the first canonical pair for the generation of F3 plants and F4 seeds, especially between more productive plants with a larger pod number and high oil content and seeds with a high germination percentage and emergence rate. For the generation of F4 plants and F5 seeds, the first canonical pair indicated an association between reduced maturity cycle, seeds with a high emergence percentage and a high percentage of normal seedlings after accelerated aging. According to the second canonical pair, more productive and taller plants were associated with seed vigor. For the generation of F4 seeds and plants, the associations established by the first canonical pair occurred between seed vigor and more productive plants with high oil content and reduced maturity cycle, and those established by the second canonical pair between seeds of high physiological quality and tall plants.
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Affiliation(s)
- E M Pereira
- Departamento de Produção Vegetal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual de São Paulo "Júlio de Mesquita Filho", Jaboticabal, SP, Brasil
| | - F M Silva
- Departamento de Produção Vegetal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual de São Paulo "Júlio de Mesquita Filho", Jaboticabal, SP, Brasil
| | - B H P Val
- Departamento de Produção Vegetal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual de São Paulo "Júlio de Mesquita Filho", Jaboticabal, SP, Brasil
| | - A Pizolato Neto
- Departamento de Produção Vegetal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual de São Paulo "Júlio de Mesquita Filho", Jaboticabal, SP, Brasil
| | - A O Mauro
- Departamento de Produção Vegetal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual de São Paulo "Júlio de Mesquita Filho", Jaboticabal, SP, Brasil
| | - C C Martins
- Departamento de Produção Vegetal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual de São Paulo "Júlio de Mesquita Filho", Jaboticabal, SP, Brasil
| | - S H Unêda-Trevisoli
- Departamento de Produção Vegetal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual de São Paulo "Júlio de Mesquita Filho", Jaboticabal, SP, Brasil
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Marconato MB, Pereira EM, Silva FM, Bizari EH, Pinheiro JB, Mauro AO, Unêda-Trevisoli SH. Genetic divergence in a soybean (Glycine max) diversity panel based on agro-morphological traits. Genet Mol Res 2016; 15:gmr-15-04-gmr.15048980. [PMID: 27886340 DOI: 10.4238/gmr15048980] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Owing to the narrow genetic basis of soybean (Glycine max), the incorporation of new sources of germplasm is indispensable when searching for alleles that contribute to a greater diversity of varieties. The alternative is plant introduction, which may increase genetic variability within breeding programs. Multivariate techniques are important tools to study genetic diversity and allow the precise elucidation of variability in a set of genotypes of interest. The agro-morphological traits of 93 soybean accessions from various continents were analyzed in order to assess the genetic diversity present, and to highlight important traits. The experimental design was incomplete blocks (Alpha lattice, 8 x 12) with three replicates. Nine agro-morphological traits were analyzed, and principal component analysis and cluster analysis were performed, the latter by Ward's method. The dendrogram obtained contained eight subgroups, confirming the genetic diversity among the accessions and revealing similarities between 11 national genotypes. The geographical origin of the accessions was not always related to the clusters. The traits evaluated, and the methods used, facilitated the distinction and characterization of genotypes between and within groups, and could be used in Brazilian soybean breeding programs.
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Affiliation(s)
- M B Marconato
- Departmento de Produção Vegetal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual de São Paulo "Júlio de Mesquita Filho", Jaboticabal, SP, Brasil
| | - E M Pereira
- Departmento de Produção Vegetal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual de São Paulo "Júlio de Mesquita Filho", Jaboticabal, SP, Brasil
| | - F M Silva
- Departmento de Produção Vegetal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual de São Paulo "Júlio de Mesquita Filho", Jaboticabal, SP, Brasil
| | - E H Bizari
- Departmento de Produção Vegetal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual de São Paulo "Júlio de Mesquita Filho", Jaboticabal, SP, Brasil
| | - J B Pinheiro
- Laboratório de Diversidade Genética e Melhoramento, Departamento de Genética, Escola Superior de Agricultura "Luiz de Queiroz", Universidade de São Paulo, Piracicaba, SP, Brasil
| | - A O Mauro
- Departmento de Produção Vegetal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual de São Paulo "Júlio de Mesquita Filho", Jaboticabal, SP, Brasil
| | - S H Unêda-Trevisoli
- Departmento de Produção Vegetal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual de São Paulo "Júlio de Mesquita Filho", Jaboticabal, SP, Brasil
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Carmo MS, Inoue F, Andrade SS, Paschoal L, Silva FM, Oliveira VGS, Pignatari ACC. New multilocus sequence typing of MRSA in São Paulo, Brazil. Braz J Med Biol Res 2011; 44:1013-7. [PMID: 21881809 DOI: 10.1590/s0100-879x2011007500114] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2011] [Accepted: 08/17/2011] [Indexed: 11/21/2022] Open
Abstract
An increased incidence of nosocomial and community-acquired infections caused by methicillin-resistant Staphylococcus aureus (MRSA) has been observed worldwide. The molecular characterization of MRSA has played an important role in demonstrating the existence of internationally disseminated clones. The use of molecular biology methods in the surveillance programs has enabled the tracking of MRSA spread within and among hospitals. These data are useful to alert nosocomial infection control programs about the potential introduction of these epidemic clones in their areas. Four MRSA blood culture isolates from patients hospitalized at two hospitals in the city of São Paulo, Brazil, were analyzed; one of them was community acquired. The isolates were characterized as SCCmec, mecA and PVL by PCR, pulsed-field gel electrophoresis (PFGE) profile and molecular sequence typing (MLST) genotyping. The isolates presented type IV SCCmec, and none proved to be positive for PVL. The isolates showed a PFGE profile similar to the pediatric clone. MLST genotyping demonstrated that the isolates belonged to clonal complex 5 (CC5), showing a new yqiL allele gene, resulting in a new sequence typing (ST) (1176). Our results showed that strains of MRSA carrying a new ST are emerging in community and nosocomial infections, including bacteremia, in São Paulo, Brazil.
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Affiliation(s)
- M S Carmo
- Laboratório Especial de Microbiologia Clínica, Departamento de Doenças Infecciosas e Parasitárias, Universidade Federal de São Paulo, São Paulo, SP, Brasil
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Silva Rossi-Aguiar VP, Navarro-Rodriguez T, Mattar R, Siqueira de Melo Peres MP, Correa Barbuti R, Silva FM, Carrilho FJ, Eisig JN. Oral cavity is not a reservoir for Helicobacter pylori in infected patients with functional dyspepsia. ACTA ACUST UNITED AC 2009; 24:255-9. [PMID: 19416457 DOI: 10.1111/j.1399-302x.2008.00491.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
INTRODUCTION Helicobacter pylori infection is very prevalent in Brazil, infecting almost 65% of the population. The aim of this study was to evaluate the presence of this bacterium in the oral cavity of patients with functional dyspepsia (epigastric pain syndrome), establish the main sites of infection in the mouth, and assess the frequency of cagA and vacA genotypes of oral H. pylori. METHODS All 43 outpatients with epigastric pain syndrome, who entered the study, were submitted to upper gastrointestinal endoscopy to rule out organic diseases. Helicobacter pylori infection in the stomach was confirmed by a rapid urease test and urea breath tests. Samples of saliva, the tongue dorsum and supragingival dental plaque were collected from the oral cavity of each subject and subgingival dental plaque samples were collected from the patients with periodontitis; H. pylori infection was verified by polymerase chain reaction using primers that amplify the DNA sequence of a species-specific antigen present in all H. pylori strains; primers that amplify a region of urease gene, and primers for cagA and vacA (m1, m2, s1a, s1b, s2) genotyping. RESULTS Thirty patients harbored H. pylori in the stomach, but it was not possible to detect H. pylori in any oral samples using P1/P2 and Urease A/B. The genotype cagA was also negative in all samples and vacA genotype could not be characterized (s-m-). CONCLUSION The oral cavity may not be a reservoir for H. pylori in patients with epigastric pain syndrome, the bacterium being detected exclusively in the stomach.
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Affiliation(s)
- V P Silva Rossi-Aguiar
- Clinical Gastroenterology Division, Department of Gastroenterology, University of São Paulo School of Medicine, São Paulo, Brazil.
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d'Azevedo PA, Secchi C, Antunes ALS, Sales T, Silva FM, Tranchesi R, Pignatari ACC. Oxacilin-resistant Coagulase-negative staphylococci (CoNS) bacteremia in a general hospital at São Paulo city, Brasil. Braz J Microbiol 2008; 39:631-5. [PMID: 24031279 PMCID: PMC3768475 DOI: 10.1590/s1517-83822008000400006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2007] [Indexed: 11/22/2022] Open
Abstract
In the last decades, coagulase-negative staphylococci (CoNS), especially Staphylococcus epidermidis have become an important cause of bloodstream infections. In addition, rates of methicillin-resistance among CoNS have increased substantially, leading to the use of glicopeptides for therapy. The objective of this study was to evaluate eleven consecutives clinically relevant cases of oxacillin-resistant CoNS bacteremia in a general hospital localized in São Paulo city, Brazil. Five different species were identified by different phenotypic methods, including S. epidermidis (5), S. haemolyticus (3), S. hominis (1), S. warneri (1) and S. cohnii subsp urealyticus (1). A variety of Pulsed Field Gel Electrophoresis profiles was observed by macrorestriction DNA analysis in S. epidermidis isolates, but two of three S. haemolyticus isolates presented the same profile. These data indicated the heterogeneity of the CoNS isolates, suggesting that horizontal dissemination of these microorganisms in the investigated hospital was not frequent. One S. epidermidis and one S. haemolyticus isolates were resistant to teicoplanin and susceptible to vancomycin. The selective pressure due to the use of teicoplanin in this hospital is relevant.
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Affiliation(s)
- P A d'Azevedo
- Laboratório Especial de Microbiologia Clínica, Universidade Federal de São Paulo , São Paulo, SP , Brasil ; Laboratório de Cocos Gram Positivos, Universidade Federal de Ciências da Saúde de Porto Alegre , Porto Alegre, RS , Brasil
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Goulart AC, Silva FM, Cardoso MA, Lotufo PA, Benseñor IM. 563: Race and Parity as Associated Factors for Obesity among Low-Income Women. Am J Epidemiol 2005. [DOI: 10.1093/aje/161.supplement_1.s141b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- A C Goulart
- School of Medicine, University of Sao Paulo, 05403-000, Sao Paulo, Brazil
| | - F M Silva
- School of Medicine, University of Sao Paulo, 05403-000, Sao Paulo, Brazil
| | - M A Cardoso
- School of Medicine, University of Sao Paulo, 05403-000, Sao Paulo, Brazil
| | - P A Lotufo
- School of Medicine, University of Sao Paulo, 05403-000, Sao Paulo, Brazil
| | - I M Benseñor
- School of Medicine, University of Sao Paulo, 05403-000, Sao Paulo, Brazil
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Schilichting CLR, Lima KCM, Cestari LA, Sekiyama JY, Silva FM, Milani H. Validation of a simple and inexpensive method for the quantitation of infarct in the rat brain. Braz J Med Biol Res 2004; 37:511-21. [PMID: 15064814 DOI: 10.1590/s0100-879x2004000400008] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [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: 11/21/2022] Open
Abstract
A gravimetric method was evaluated as a simple, sensitive, reproducible, low-cost alternative to quantify the extent of brain infarct after occlusion of the medial cerebral artery in rats. In ether-anesthetized rats, the left medial cerebral artery was occluded for 1, 1.5 or 2 h by inserting a 4-0 nylon monofilament suture into the internal carotid artery. Twenty-four hours later, the brains were processed for histochemical triphenyltetrazolium chloride (TTC) staining and quantitation of the schemic infarct. In each TTC-stained brain section, the ischemic tissue was dissected with a scalpel and fixed in 10% formalin at 0 masculine C until its total mass could be estimated. The mass (mg) of the ischemic tissue was weighed on an analytical balance and compared to its volume (mm(3)), estimated either by plethysmometry using platinum electrodes or by computer-assisted image analysis. Infarct size as measured by the weighing method (mg), and reported as a percent (%) of the affected (left) hemisphere, correlated closely with volume (mm(3), also reported as %) estimated by computerized image analysis (r = 0.88; P < 0.001; N = 10) or by plethysmography (r = 0.97-0.98; P < 0.0001; N = 41). This degree of correlation was maintained between different experimenters. The method was also sensitive for detecting the effect of different ischemia durations on infarct size (P < 0.005; N = 23), and the effect of drug treatments in reducing the extent of brain damage (P < 0.005; N = 24). The data suggest that, in addition to being simple and low cost, the weighing method is a reliable alternative for quantifying brain infarct in animal models of stroke.
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Affiliation(s)
- C L R Schilichting
- Departamento de Farmácia e Farmacologia, Centro de Ciências da Saúde, Universidade Estadual de Maringá, Maringa, PR, Brazil
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Silva FM, Zaterka S, Eisig JN, Chehter EZ, Chinzon D, Laudanna AA. Factors affecting Helicobacter pylori eradication using a seven-day triple therapy with a proton pump inhibitor, tinidazole and clarithromycin, in Brazilian patients with peptic ulcer. Rev Hosp Clin Fac Med Sao Paulo 2001; 56:11-6. [PMID: 11378678 DOI: 10.1590/s0041-87812001000100003] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
UNLABELLED Triple therapy is accepted as the treatment of choice for H. pylori eradication. In industrialized countries, a proton pump inhibitor plus clarithromycin and amoxicillin or nitroimidazole have shown the best results. Our aims were: 1. To study the eradication rate of the association of a proton pump inhibitor plus tinidazole and clarithromycin on H. pylori infection in our population. 2. To determine if previous treatments, gender, age, tobacco, alcohol use, and non-steroidal anti-inflammatory drugs (NSAIDs) change the response to therapy. METHODS Two hundred patients with peptic ulcer (upper endoscopy) and H. pylori infection (histology and rapid urease test - RUT) were included. A proton pump inhibitor (lanzoprazole 30 mg or omeprazole 20 mg), tinidazole 500 mg, and clarithromycin 250 mg were dispensed twice a day for a seven-day period. Eradication was assessed after 10 to 12 weeks of treatment through histology and RUT. RESULTS The eradication rate of H. pylori per protocol was 65% (128/196 patients). This rate was 53% for previously treated patients, rising to 76% for not previously treated patients, with a statistical difference p<0.01. No significant difference was observed regarding sex, tobacco use, alcohol consumption, and NSAID use, but for elderly patients the difference was p = 0.05. Adherence to treatment was good, and side effects were mild. CONCLUSIONS A proton pump inhibitor, tinidazole, and clarithromycin bid for seven days resulted in H. pylori eradication in 65% of the patients. Previous treatments were the main cause of treatment failure.
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Affiliation(s)
- F M Silva
- Department of Gastroenterology, Hospital das Clínicas, Faculty of Medicine, University of São Paulo
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Silva FM, Gibbs P, Vieira MC, Silva CL. Thermal inactivation of Alicyclobacillus acidoterrestris spores under different temperature, soluble solids and pH conditions for the design of fruit processes. Int J Food Microbiol 1999; 51:95-103. [PMID: 10574085 DOI: 10.1016/s0168-1605(99)00103-8] [Citation(s) in RCA: 116] [Impact Index Per Article: 4.6] [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: 11/28/2022]
Abstract
Alicyclobacillus acidoterrestris, a thermoacidophilic, non-pathogenic and spore-forming bacterium has been detected in several spoiled commercial pasteurised fruit juices. A. acidoterrestris spores, besides being resistant to the pasteurisation treatment conditions normally applied to acidic fruit products, can germinate and grow causing spoilage. Therefore, this microorganism was suggested as the target to be used in the design of adequate pasteurisation processes. The objectives of this work were to investigate the influence of temperature (T: 85-97 degrees C), total soluble solids (SS: 5-60 degrees Brix or % by weight) and pH (2.5-6.0) on D-values (decimal reduction time) of Alicyclobacillus acidoterrestris (type strain, NCIMB 13137) spores, and to fit a model using response surface methodology. A central composite face-centred experimental design was used, and the response, D-value determined in malt extract broth, ranged between 0.498+/-0.045 and 94.9+/-6.7 min. Within the factor ranges studied, temperature was the parameter that most affected the D-value. Following this was the SS and, lastly, the pH value. A linear decrease in D-value was observed with decreasing SS and pH, and a non-linear decrease in D-value was noticed with increasing temperature. A second order polynomial was successfully fitted to the data (R2 = 0.98). In general, D-values measured in real fruit systems, such as orange, apple and grape juices, blackcurrant concentrates, cupuaçu (exotic fruit) extract and orange juice drink, were higher than those predicted by the malt extract broth model. This result emphasises the importance of experimental validation of any model-derived process.
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Affiliation(s)
- F M Silva
- Escola Superior de Biotecnologia-UCP, Porto, Portugal.
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Abstract
The aim of this study was to validate the 14C-urea breath test for use in diagnosis of Helicobacter pylori infection. Thirty H. pylori positive patients, based on histologic test and thirty H. pylori negative patients by histology and anti-H. pylori IgG entered the study. Fasting patients drank 5 uCi of 14C-urea in 20 ml of water. Breath samples were collected at 0, 5, 10, 15, 20 and 30 min. The difference of cpm values between the two groups was significant at all the time intervals, besides time 0 (p < 0.0001). At 20 min, the test gave 100% sensitivity and specificity with a cut-off value of 562 cpm. Females were higher expirers than males (p = 0.005). 14C-urea breath test is highly accurate for Helicobacter pylori diagnosis. It is fast, simple and should be the non-invasive test used after treating Helicobacter pylori infection.
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Affiliation(s)
- R Mattar
- Department of Gastroenterology, Hospital of Clinics, University of São Paulo School of Medicine, Brazil.
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Grupenmacher F, Silva FM, Abib FC, Grupenmacher L, Silva AC, de Almeida PT. Determination of cadaveric antibody against HIV in vitreous humor of HIV-positive patients: potential use in corneal transplantation. Ophthalmologica 1991; 203:12-6. [PMID: 1766636 DOI: 10.1159/000310219] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [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: 12/28/2022]
Abstract
The authors suggest the determination of antibody against HIV in vitreous humor as a screening technique for AIDS carriers, specially in cases of corneal transplantation when the eye bank could make the examinations required and in cases when drawing blood after death becomes difficult. Ten eyes of patients having died of AIDS-related causes were studied and 100% of the samples tested were found to be positive. False-positive results were eliminated by the study of a group of 90 eyes of patients dead from nonrelated causes; the results were all negative. Therefore, no discrepancy was noticed between the examination of the blood and the vitreous humor. A description is made of a technique which uses a special trocar that enables the examination to be made without contamination with blood. The authors conclude that the determination of antibodies in vitreous humor is a choice to be considered as a postmortem examination because it can be easily obtained and its results are reliable.
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Affiliation(s)
- F Grupenmacher
- Department of Ophthalmology, Federal University of Paraná, Brazil
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de Oliveira SJ, Pianta C, Ramos ET, Prates de Azevedo CA, Barbosa Antunes CA, Silva FM. [Veterinary public health. Study of tuberculosis in milk cattle]. Bol Oficina Sanit Panam 1983; 94:142-9. [PMID: 6221733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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