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Wolfe AR, Feng H, Zuniga O, Rodrigues H, Eldridge DE, Yang L, Shen C, Williams TM. RAS-RAF-miR-296-3p signaling axis increases Rad18 expression to augment radioresistance in pancreatic and thyroid cancers. Cancer Lett 2024; 591:216873. [PMID: 38604313 DOI: 10.1016/j.canlet.2024.216873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 11/08/2023] [Revised: 03/18/2024] [Accepted: 04/06/2024] [Indexed: 04/13/2024]
Abstract
Oncogenic RAS and RAF signaling has been implicated in contributing to radioresistance in pancreatic and thyroid cancers. In this study, we sought to better clarify molecular mechanisms contributing to this effect. We discovered that miRNA 296-3p (miR-296-3p) is significantly correlated with radiosensitivity in a panel of pancreatic cancer cells, and miR-296-3p is highly expressed in normal cells, but low in cancer cell lines. Elevated expression of miR-296-3p increases radiosensitization while decreasing the expression of the DNA repair enzyme RAD18 in both pancreatic and thyroid cancer cells. RAD18 is overexpressed in both pancreatic and thyroid tumors compared to matched normal controls, and high expression of RAD18 in tumors is associated with poor prognostic features. Modulating the expression of mutant KRAS in pancreatic cancer cells or mutant BRAF in thyroid cancer cells demonstrates a tight regulation of RAD18 expression in both cancer types. Depletion of RAD18 results in DNA damage and radiation-induced cell death. Importantly, RAD18 depletion in combination with radiotherapy results in marked and sustained tumor regression in KRAS mutant pancreatic cancer orthotopic tumors and BRAF mutant thyroid heterotopic tumors. Overall, our findings identify a novel coordinated RAS/RAF-miR-296-3p-RAD18 signaling network in pancreatic and thyroid cancer cells, which leads to enhanced radioresistance.
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Affiliation(s)
- Adam R Wolfe
- Department of Radiation Oncology, The University of Arkansas for Medical Sciences, The Winthrop P. Rockefeller Cancer Institute, Little Rock, AR, USA
| | - Haihua Feng
- Department of Radiation Oncology, City of Hope, Duarte, CA, USA
| | - Oscar Zuniga
- Department of Radiation Oncology, The University of Arkansas for Medical Sciences, The Winthrop P. Rockefeller Cancer Institute, Little Rock, AR, USA
| | - Henrique Rodrigues
- Department of Radiation Oncology, The University of Arkansas for Medical Sciences, The Winthrop P. Rockefeller Cancer Institute, Little Rock, AR, USA
| | - Daniel E Eldridge
- Department of Veterinary Medicine, The University of Arkansas for Medical Sciences, The Winthrop P. Rockefeller Cancer Institute, Little Rock, AR, USA
| | - Linlin Yang
- Department of Radiation Oncology, City of Hope, Duarte, CA, USA
| | - Changxian Shen
- Department of Radiation Oncology, City of Hope, Duarte, CA, USA
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Kesaria AZ, Yee EU, Akana LK, Rodrigues H, Wolfe AR. Targeting Tri-Methyl-Histone H3 (Lys27) in Rectal Cancer: A Novel Strategy to Enhance Radiosensitivity and Predict Response to Neoadjuvant Therapy. Int J Radiat Oncol Biol Phys 2023; 117:S43. [PMID: 37784499 DOI: 10.1016/j.ijrobp.2023.06.318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Tri-Methyl-Histone H3 (Lys27) is a modification of histone H3 involved in gene regulation and chromatin organization. It plays a crucial role in cell response to ionizing radiation and affects DNA damage repair, with altered levels being linked to decreased radiation sensitivity. Our hypothesis is that high levels of Tri-Methyl-Histone H3 (Lys27) in rectal tumors can predict response to neoadjuvant chemoradiation, and targeting SETD2, the histone methyltransferase responsible for adding the tri-methyl group to Lys27 of histone H3, may enhance radiosensitivity in rectal cancer cells. MATERIALS/METHODS Biopsy samples from 25 patients with locally advanced rectal adenocarcinoma (Stage II-III) were obtained for analysis. Immunohistochemistry (IHC) was used to evaluate Tri-Methyl-Histone H3 (Lys27) expression levels in the tumor biopsies. The staining intensity was scored semi-quantitatively. Samples with 100% positive staining were grouped as "Tri-Methyl-High," and all others were grouped as "Tri-Methyl-Low." Fisher's exact test was used to analyze the data to determine the correlation between Tri-Methyl-Histone H3 (Lys27) levels and response to neoadjuvant chemoradiation. The primary endpoint was either a sustained clinical complete response (cCR) at one year or a pathological complete response (pCR). To further understand the role of Tri-Methyl-Histone H3 (Lys27) in response to ionizing radiation (IR), clonogenic assays, γH2aX foci staining, and western blot analysis of DNA damage response proteins and histones were performed on two established human rectal cancer cell lines following either RNA inhibition (RNAi) or drug targeting of SETD2. RESULTS Twenty-five patients with rectal cancer had pre-treatment biopsies analyzed for Tri-Methyl-Histone H3 (Lys27) levels, 11 were classified as Tri-Methyl-High and 14 as Tri-Methyl-Low. The groups were well balanced in terms of age, sex, clinical T/N stage, and neoadjuvant treatment approach. The overall combined complete response (cCR/pCR) rate was 36%, while the rate for Tri-Methyl-High patients was 9% (1/11) compared to 57% (8/14) in Tri-Methyl-Low patients (p = 0.03). After treating two colorectal cancer cell lines (SW837 and HCT116) with IR (5 Gy) in vitro, Tri-Methyl-Histone H3 (Lys27) levels increased 3-fold. SETD2 RNAi reduced Tri-Methyl-Histone H3 (Lys27) and increased cell death when combined with IR. In vitro treatment with a novel SETD2 inhibitor, EZM0414, led to a 2-fold increase in DNA damage following IR (5 Gy) as measured by γH2aX foci staining. EZM0414 treatment showed a 37% improvement in the dose enhancement ratio. CONCLUSION Our study uncovers a new biomarker, Tri-Methyl-Histone H3 (Lys27), that could be used to predict response to neoadjuvant chemoradiation in rectal cancer patients. Our preclinical data indicates that targeting SETD2 to reduce Tri-Methyl-Histone H3 (Lys27) mediated DNA repair could improve the efficacy of radiation therapy for rectal cancer patients.
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Affiliation(s)
- A Z Kesaria
- Department of Radiation Oncology, UAMS Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, AR
| | - E U Yee
- Department of Pathology, University of Arkansas for Medical Sciences, Little Rock, AR
| | - L K Akana
- Department of Radiation Oncology, University of Arkansas for Medical Sciences, Little Rock, AR
| | - H Rodrigues
- Department of Radiation Oncology, University of Arkansas for Medical Sciences, Little Rock, AR
| | - A R Wolfe
- Department of Radiation Oncology, The University of Arkansas for Medical Sciences, Little Rock, AR
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Abstract
BACKGROUND Guidelines on managing arterial blood pressure have begun to include lower targets, despite the risk for overmedication-induced hypotension. Because there is no consensus as to what constitutes overmedication in the treatment of hypertension, we conducted a study to develop relevant diagnostic criteria. METHODS We used ambulatory monitoring during a 24-hour period to measure blood pressure in 567 patients with medication-controlled hypertension. We then divided this cohort into 3 groups. Group A (n = 413 [72.8%]) comprised patients in whom less than 10% of systolic blood pressure measurements were less than 100 mm Hg (no or mild hypotension). Group B (n = 154 [27.2%]) comprised patients in whom 10% or more of the measurements were less than 100 mm Hg, signifying overmedication. Group C comprised those patients in Group B in whom 20% or more of the measurements were less than 100 mm Hg (n = 74 [48.1%]; attributed to "accentuated" overmedication). Group C patients were prescribed significantly more antihypertensive drugs than were group A patients. RESULTS Our findings support a 2-part definition of overmedication in hypertension treatment: (1) mild overmedication, in which 10% or more but less than 20% of systolic blood pressure measurements are less than 100 mm Hg in the awake state and less than 90 mm Hg during sleep; and (2) accentuated overmedication, characterized by 20% or more of valid systolic blood pressure measurements less than 100 mm Hg in the awake state and less than 90 mm Hg during sleep, during a 24-hour period. CONCLUSION We think this guidance will help to avoid overmedicating and consequences such as fainting and falls when systolic blood pressure is too low.
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Affiliation(s)
- Ricardo Pereira Silva
- School of Medicine, Federal University of Ceará, Fortaleza, Brazil.,Unicordis, Hospital São Mateus, Fortaleza, Brazil
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Rodrigues H, Ramos R, Fagundes L, Galego O, Navega D, Coelho JD, Alves FC, Cunha E. Mastoid, middle ear and inner ear analysis in CT scan - a possible contribution for the identification of remains. Med Sci Law 2020; 60:102-111. [PMID: 32050849 DOI: 10.1177/0025802419893424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Objective We aimed to evaluate whether the internal structures of the human ear have anatomical characteristics that are sufficiently distinctive to contribute to human identification and use in a forensic context. Materials and methods After data anonymisation, a dataset containing temporal bone CT scans of 100 subjects was processed by a radiologist who was not involved in the study. Four reference images were selected for each subject. Of the original sample, 10 examinations were used for visual comparison, case by case, against the dataset of 100 patients. This visual assessment was performed independently by four observers, who evaluated the anatomical agreement using a Likert scale (1–5). Inter-observer agreement, true positive rate, positive predictive value, true negative rate, negative predictive value, false positive rate, false negative rate and positive likelihood ratio (LR+) were evaluated. Results Inter-observer agreement obtained an overall Cohen’s Kappa = 99.59%. True positive rate, positive predictive value, true negative rate and negative predictive value were all 100%. Conclusion Visual assessment of the mastoid examinations was shown to be a robust and reliable approach to identify unique osseous features and contribute to human identification. The statistical analysis indicates that regardless of the examiner’s background and training, the approach has a high degree of accuracy.
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Affiliation(s)
| | - Rosa Ramos
- Centro Hospitalar e Universitario de Coimbra EPE, Portugal
| | | | - Orlando Galego
- Centro Hospitalar e Universitario de Coimbra EPE, Portugal
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Antunes T, Bouca A, Carracha C, Costa A, Oliveira H, Silva L, Rodrigues H, Coelho P. Giant cemento-ossifying fibroma of the mandible – report on a clinical case. Int J Oral Maxillofac Surg 2019. [DOI: 10.1016/j.ijom.2019.03.688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Rodrigues H, Cielo DP, Goméz-Corona C, Silveira AAS, Marchesan TA, Galmarini MV, Richards NSPS. Eating flowers? Exploring attitudes and consumers' representation of edible flowers. Food Res Int 2017; 100:227-234. [PMID: 28888445 DOI: 10.1016/j.foodres.2017.08.018] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [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: 05/07/2017] [Revised: 08/09/2017] [Accepted: 08/12/2017] [Indexed: 10/19/2022]
Abstract
Edible flowers have gained more attention in recent years thanks to their perceived health benefits. Despite this attention, it seems that edible flowers are not popularized for consumption in South America, being considered unfamiliar for some cultures from this continent. In this context, the general goal of the present study was to investigate the three dimensions of social representation theory, the representational field, the information and the attitude of the two conditions of edible flowers: a more general "food made with flowers" and more directional product "yoghurt made with flowers", using Brazilian consumers. To achieve this goal, a free word association task was applied. A total of 549 consumers participated in this study. Participants were divided into two conditions, in which the inductor expressions for the free word association task changed: (a) food products made with flowers and (b) yoghurt made with flowers. Results showed a very positive attitude to both situations, and consumers associated Food products made with flowers to "health care" while the central core of yoghurt made with flowers reflected the innovative condition of this product, supported here by their unpredictable character (information generated).
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Affiliation(s)
- H Rodrigues
- School of Food Engineering, Department of Food and Nutrition, Universidade Estadual de Campinas, UNICAMP, Rua Monteiro Lobato, 80, Barão Geraldo, Campinas, SP, Brazil.
| | - D P Cielo
- Departament of Technology and Food Science, Universidade Federal de Santa Maria, UFSM, Av. Roraima, n. 1000, Cidade Universitária, Bairro Camobi, Santa Maria, RS, Brazil
| | - C Goméz-Corona
- Sensory and Consumer Laboratory, Biotechnology Department, Universidad Autónoma Metropolitana, Av. San Rafael Atlixco No. 186, 09340 México City, Mexico
| | - A A S Silveira
- Departament of Technology and Food Science, Universidade Federal de Santa Maria, UFSM, Av. Roraima, n. 1000, Cidade Universitária, Bairro Camobi, Santa Maria, RS, Brazil
| | - T A Marchesan
- Departament of Technology and Food Science, Universidade Federal de Santa Maria, UFSM, Av. Roraima, n. 1000, Cidade Universitária, Bairro Camobi, Santa Maria, RS, Brazil
| | - M V Galmarini
- Consejo Nacional de Investigacion Cientifica y Tecnologica, Tte. Gral. Juan Domingo Perón 2158, C1040AAH CABA Buenos Aires, Argentina and; Universidad Católica Argentina, Facultad de Ingeniería y Ciencias Agrarias, Avenida Alicia Moreau de Justo 1500, C1107AFB CABA, Buenos Aires, Argentina
| | - N S P S Richards
- Departament of Technology and Food Science, Universidade Federal de Santa Maria, UFSM, Av. Roraima, n. 1000, Cidade Universitária, Bairro Camobi, Santa Maria, RS, Brazil
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Chinivasagam HN, Estella W, Rodrigues H, Mayer DG, Weyand C, Tran T, Onysk A, Diallo I. On-farm Campylobacter and Escherichia coli in commercial broiler chickens: Re-used bedding does not influence Campylobacter emergence and levels across sequential farming cycles. Poult Sci 2016; 95:1105-15. [PMID: 26908887 PMCID: PMC4957531 DOI: 10.3382/ps/pew003] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [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: 08/10/2015] [Accepted: 11/26/2015] [Indexed: 12/20/2022] Open
Abstract
Limitations in quality bedding material have resulted in the growing need to re-use litter during broiler farming in some countries, which can be of concern from a food-safety perspective. The aim of this study was to compare the Campylobacter levels in ceca and litter across three litter treatments under commercial farming conditions. The litter treatments were (a) the use of new litter after each farming cycle; (b) an Australian partial litter re-use practice; and (c) a full litter re-use practice. The study was carried out on two farms over two years (Farm 1, from 2009–2010 and Farm 2, from 2010–2011), across three sheds (35,000 to 40,000 chickens/shed) on each farm, adopting three different litter treatments across six commercial cycles. A random sampling design was adopted to test litter and ceca for Campylobacter and Escherichia coli, prior to commercial first thin-out and final pick-up. Campylobacter levels varied little across litter practices and farming cycles on each farm and were in the range of log 8.0–9.0 CFU/g in ceca and log 4.0–6.0 MPN/g for litter. Similarly the E. coli in ceca were ∼log 7.0 CFU/g. At first thin-out and final pick-up, the statistical analysis for both litter and ceca showed that the three-way interaction (treatments by farms by times) was highly significant (P < 0.01), indicating that the patterns of Campylobacter emergence/presence across time vary between the farms, cycles and pickups. The emergence and levels of both organisms were not influenced by litter treatments across the six farming cycles on both farms. Either C. jejuni or C. coli could be the dominant species across litter and ceca, and this phenomenon could not be attributed to specific litter treatments. Irrespective of the litter treatments in place, cycle 2 on Farm 2 remained Campylobacter-free. These outcomes suggest that litter treatments did not directly influence the time of emergence and levels of Campylobacter and E. coli during commercial farming.
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Affiliation(s)
- H N Chinivasagam
- EcoSciences Precinct, Department of Agriculture and Fisheries, Dutton Park 4102, Queensland, Australia
| | - W Estella
- EcoSciences Precinct, Department of Agriculture and Fisheries, Dutton Park 4102, Queensland, Australia
| | - H Rodrigues
- EcoSciences Precinct, Department of Agriculture and Fisheries, Dutton Park 4102, Queensland, Australia
| | - D G Mayer
- EcoSciences Precinct, Department of Agriculture and Fisheries, Dutton Park 4102, Queensland, Australia
| | - C Weyand
- EcoSciences Precinct, Department of Agriculture and Fisheries, Dutton Park 4102, Queensland, Australia
| | - T Tran
- EcoSciences Precinct, Department of Agriculture and Fisheries, Dutton Park 4102, Queensland, Australia
| | - A Onysk
- EcoSciences Precinct, Department of Agriculture and Fisheries, Dutton Park 4102, Queensland, Australia
| | - I Diallo
- Biosecurity Sciences Laboratory, Health and Food Sciences Precinct, Department of Agriculture and Fisheries, PO Box 156 Archerfield BC 4108, Queensland, Australia
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Araujo RN, Franco PF, Rodrigues H, Santos LCB, McKay CS, Sanhueza CA, Brito CRN, Azevedo MA, Venuto AP, Cowan PJ, Almeida IC, Finn MG, Marques AF. Amblyomma sculptum tick saliva: α-Gal identification, antibody response and possible association with red meat allergy in Brazil. Int J Parasitol 2016; 46:213-220. [PMID: 26812026 DOI: 10.1016/j.ijpara.2015.12.005] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2015] [Revised: 12/04/2015] [Accepted: 12/10/2015] [Indexed: 01/08/2023]
Abstract
The anaphylaxis response is frequently associated with food allergies, representing a significant public health hazard. Recently, exposure to tick bites and production of specific IgE against α-galactosyl (α-Gal)-containing epitopes has been correlated to red meat allergy. However, this association and the source of terminal, non-reducing α-Gal-containing epitopes have not previously been established in Brazil. Here, we employed the α-1,3-galactosyltransferase knockout mouse (α1,3-GalT-KO) model and bacteriophage Qβ-virus like particles (Qβ-VLPs) displaying Galα1,3Galβ1,4GlcNAc (Galα3LN) epitopes to investigate the presence of α-Gal-containing epitopes in the saliva of Amblyomma sculptum, a species of the Amblyomma cajennense complex, which represents the main tick that infests humans in Brazil. We confirmed that the α-1,3-galactosyltransferase knockout animals produce significant levels of anti-α-Gal antibodies against the Galα1,3Galβ1,4GlcNAc epitopes displayed on Qβ-virus like particles. The injection of A. sculptum saliva or exposure to feeding ticks was also found to induce both IgG and IgE anti-α-Gal antibodies in α-1,3-galactosyltransferase knockout mice, thus indicating the presence of α-Gal-containing epitopes in the tick saliva. The presence of α-Gal-containing epitopes was confirmed by ELISA and immunoblotting following removal of terminal α-Gal epitopes by α-galactosidase treatment. These results suggest for the first known time that bites from the A. sculptum tick may be associated with the unknown etiology of allergic reactions to red meat in Brazil.
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Affiliation(s)
- Ricardo Nascimento Araujo
- Universidade Federal de Minas Gerais, Instituto de Ciencias Biologicas, Departamento de Parasitologia, Pampulha, Belo Horizonte, Minas Gerais, Brazil
| | - Paula Ferreira Franco
- Universidade Federal de Minas Gerais, Instituto de Ciencias Biologicas, Departamento de Parasitologia, Pampulha, Belo Horizonte, Minas Gerais, Brazil
| | - Henrique Rodrigues
- Universidade Federal de Minas Gerais, Instituto de Ciencias Biologicas, Departamento de Parasitologia, Pampulha, Belo Horizonte, Minas Gerais, Brazil
| | - Luiza C B Santos
- Universidade Federal de Minas Gerais, Instituto de Ciencias Biologicas, Departamento de Parasitologia, Pampulha, Belo Horizonte, Minas Gerais, Brazil
| | - Craig S McKay
- Georgia Institute of Technology, School of Chemistry and Biochemistry, Atlanta, GA, USA
| | - Carlos A Sanhueza
- Georgia Institute of Technology, School of Chemistry and Biochemistry, Atlanta, GA, USA
| | - Carlos Ramon Nascimento Brito
- Universidade Federal de Minas Gerais, Instituto de Ciencias Biologicas, Departamento de Parasitologia, Pampulha, Belo Horizonte, Minas Gerais, Brazil
| | - Maíra Araújo Azevedo
- Universidade Federal de Minas Gerais, Instituto de Ciencias Biologicas, Departamento de Parasitologia, Pampulha, Belo Horizonte, Minas Gerais, Brazil
| | - Ana Paula Venuto
- Universidade Federal de Minas Gerais, Instituto de Ciencias Biologicas, Departamento de Parasitologia, Pampulha, Belo Horizonte, Minas Gerais, Brazil
| | - Peter J Cowan
- Immunology Research Centre, St. Vincent's Hospital, Fitzroy, Melbourne, VIC 3065, Australia; Department of Medicine, University of Melbourne, Parkville, VIC 3052, Australia
| | - Igor C Almeida
- Border Biomedical Research Center, Department of Biological Sciences, University of Texas at El Paso, El Paso, TX 79912, USA
| | - M G Finn
- Georgia Institute of Technology, School of Chemistry and Biochemistry, Atlanta, GA, USA
| | - Alexandre F Marques
- Universidade Federal de Minas Gerais, Instituto de Ciencias Biologicas, Departamento de Parasitologia, Pampulha, Belo Horizonte, Minas Gerais, Brazil.
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Panza N, Rodrigues H, Cocuroci D, Helayël-Neto J. Discussion on possible effects of the Barbero-Immirzi parameter at the TeV-scale particle physics. Int J Clin Exp Med 2014. [DOI: 10.1103/physrevd.90.125007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Ali Tatar-Chentir NN, Keddari Malika K, Chentir MC, Labanti G, Brancaleoni R, Bordoni B, Urbinati S, Gosciniak P, Zablocka W, Nikodemska I, Larysz B, Klisiewicz A, Kukulski T, Shimbo M, Watanabe H, Terada M, Iino T, Iino K, Ito H, Gosciniak P, Florczyk M, Zablocka W, Nikodemska I, Kurzyna M, Torbicki A, Almeida Morais L, Galego S, Marques N, Rodrigues H, Abreu R, Vasconcelos L, Sousa Guerreiro A. Case-based session: see this case at least once: Saturday 6 December 2014, 10:00-11:00 * Location: Agora. Eur Heart J Cardiovasc Imaging 2014. [DOI: 10.1093/ehjci/jeu261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Neto T, Amado I, Balhau R, Marcelino J, Barroso L, Sanz D, H.Marques, Rodrigues H, Correia-Sá I, Ferreira A. Parotid surgery – 10 years experience from a single institution in Portugal (Department of Maxillofacial Surgery of University Hospital Center of Coimbra). Int J Oral Maxillofac Surg 2013. [DOI: 10.1016/j.ijom.2013.07.631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Monteiro F, Rodrigues H, Kalil J, Castro MC, Panajotopoulos N, Paredes M, Massarolo P, Mies S. Pre- and posttransplant monitoring of alloantibodies by complement-dependent cytotoxicity and luminex methodologies in liver transplantation. Transplant Proc 2013; 44:2411-2. [PMID: 23026608 DOI: 10.1016/j.transproceed.2012.07.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
BACKGROUND This study evaluated the influence of circulating anti-HLA antibodies on outcomes of 97 liver allografts from deceased donors. METHODS Human leukocyte antigen (HLA) antibody screening was performed by both complement-dependent cytotoxicity (CDC) and multiparameter Luminex microsphere-based assays (Luminex assay). RESULTS The agreements between T- and B- cell CDC and Luminex assays were 67% and 77% for pre- and posttransplant specimens, respectively. Graft dysfunction was not associated with either positive pretransplant CDC or Luminex panel-reactive antibody (PRA) values. Likewise, positive posttransplant T- or B- cell CDC PRA values were not associated with graft dysfunction. In contrast, posttransplant Luminex PRA values were significantly higher among patients with graft dysfunction compared with subjects with good outcomes (P = .017). CONCLUSION Posttransplant monitoring of HLA antibodies with Luminex methodology allowed identification of patients at high-risk for poor graft outcomes.
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Affiliation(s)
- F Monteiro
- Laboratory of Transplantation Immunology, University of São Paulo Medical School, São Paulo, Brazil.
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Abreu M, Matos E, Afonso N, Pereira D, Rodrigues H, Henrique R, Lopes C. Male Breast Cancer: The Experience of an Oncological Center. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)32935-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Soares R, Shvets Y, Afonso N, Rodrigues H. 332 Evaluation of Molecular Parameters and Risk Factors of Breast Cancer in Therapeutic Decisions. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)70398-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Soares R, Shvets Y, Afonso N, Sousa S, Couto R, Pereira D, Rodrigues H. 8033 POSTER Metastatic Endometrial Cancer at Diagnosis – Survival Patterns. Eur J Cancer 2011. [DOI: 10.1016/s0959-8049(11)72121-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Bexiqa JG, Shvets Y, Couto N, Ferreira M, Vallinoto R, Couto R, Sousa S, Afonso N, Pereira D, Rodrigues H. 5154 POSTER Adjuvant Treatment of Breast Cancer With FEC-D – a Retrospective Analysis of a Single Portuguese Cancer Centre Database. Eur J Cancer 2011. [DOI: 10.1016/s0959-8049(11)71596-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Carneiro F, Godinho J, Sousa N, Ferreira P, Raimundo A, Rodrigues H. 4021 POSTER Dacarbazine as First Line Treatment of Metastatic Melanoma in Elderly Patients. Eur J Cancer 2011. [DOI: 10.1016/s0959-8049(11)71264-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Martins Ferreira Castro AF, Alves MP, Azevedo I, Silva JD, Rodrigues H. Epidemiology of the head and neck carcinoma of northern Portugal between 1986-2009. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e16035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Weber R, Monteiro F, Preuhs-Filho G, Rodrigues H, Kalil J, Miziara ID. HLA-DRB1*04:02, DRB1*08:04 and DRB1*14 alleles associated to pemphigus vulgaris in southeastern Brazilian population. ACTA ACUST UNITED AC 2011; 78:92-3. [PMID: 21554253 DOI: 10.1111/j.1399-0039.2011.01705.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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David-Neto E, David DSR, Ginani GF, Rodrigues H, Souza PS, Castro MCR, Kanashiro H, Saito F, Falci R, Antonopoulos IM, Piovesan AC, Nahas WC. C4d staining in post-reperfusion renal biopsy is not useful for the early detection of antibody-mediated rejection when CDC crossmatching is negative. Nephrol Dial Transplant 2010; 26:1388-92. [DOI: 10.1093/ndt/gfq549] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Monteiro F, Rodrigues H, Kalil-Filho JE, Paredes M, Massarolo P, Mies S. POST-TRANSPLANT HLA ANTIBODIES DETECTED BY LUMINEX DONOR-SPECIFIC CROSSMATCH CORRELATE WITH POOR LIVER GRAFT OUTCOME. Transplantation 2010. [DOI: 10.1097/00007890-201007272-00529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Monteiro F, Rodrigues H, Kalil-Filho JE, Adams P, Paredes M, Massarolo P, Mies S. CLINICAL RELEVANCE OF PRE- AND POST- TRANSPLANT ALLOANTIBODIES DETECTED BY COMPLEMENT-DEPENDENT CYTOTOXICITY AND LUMINEX METHODOLOGIES IN LIVER TRANSPLANTATION. Transplantation 2010. [DOI: 10.1097/00007890-201007272-00187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Antunes H, Rodrigues H, Silva N, Ferreira C, Carvalho F, Ramalho H, Gonçalves A, Branca F. Etiology of bronchiolitis in a hospitalized pediatric population: prospective multicenter study. J Clin Virol 2010; 48:134-6. [PMID: 20362492 PMCID: PMC7108435 DOI: 10.1016/j.jcv.2010.03.002] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [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: 12/02/2009] [Revised: 03/03/2010] [Accepted: 03/05/2010] [Indexed: 11/30/2022]
Abstract
Background In 2006, bronchiolitis due to adenovirus nosocomial infections resulted in the closure of a pediatric department in northern Portugal. Objectives To determine the etiology of bronchiolitis in northern Portugal. Study design It was a prospective multicenter study on the etiology of bronchiolitis during the respiratory syncytial virus (RSV) season (November–April). Children ≤24 months of age admitted for a first wheezing episode were included. Nasopharyngeal specimens were analyzed by an indirect immunofluorescent-antibody assay (IFA) for RSV, adenovirus (HAdV), parainfluenza (PIV) 1–3 and influenza (IV) A and B and by polymerase chain reaction (PCR) or reverse transcription-PCR for the same viruses and for human metapneumovirus (hMPV), bocavirus (HBoV), rhinovirus (HRV), coronaviruses (229/E; NL63; OC43; HKU1) and enterovirus. Results During this period, 253 children were included, 249 IFA analyses and 207 PCRs were performed. IFA detected RSV in 58.1%; PCR increased it to 66.7%. IFA detected HAdV in 3.2%, PCR 10.0%. PCR detected IV A in 5; IV B in 2; PIV 1 in 6, PIV 2 in 4 and PIV 3 in 11 cases. HBoV, as single agent in 2 cases, and HRV were positive in 8 samples and hMPV in 11. With this virus panel, 19.7% remained without etiology. Conclusions The most frequent agent was RSV, followed by HAdV. PCR can be cost-effective and more accurate than IFA, which is crucial for HAdV that may be associated with significant mortality (IFA alone did not detect 2/3 of the cases).
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Affiliation(s)
- H Antunes
- Pediatrics Department, Braga Hospital, 4701-965 Braga, Portugal.
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Soares R, Shvets Y, Faustino I, Afonso N, Sousa S, Rodrigues H. 167 Hormone receptor-negative breast cancer: a study of prognostic factors. EJC Suppl 2010. [DOI: 10.1016/s1359-6349(10)70198-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Faustino I, Shvets Y, Loureiro J, Leal C, Soares R, Couto R, Pereira D, Sousa S, Afonso N, Rodrigues H. 163 Typical medullary carcinoma of the breast: experience of a single institution. EJC Suppl 2010. [DOI: 10.1016/s1359-6349(10)70194-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Faustino C, Afonso N, Sousa B, Sousa S, Couto R, Pereira D, Rodrigues H. 8042 Cisplatin plus topotecan in advanced/recurrent cervical cancer – experience from a single institution. EJC Suppl 2009. [DOI: 10.1016/s1359-6349(09)71564-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Gonçalves F, Valentim H, Rodrigues H, Castro JM, d'Eça FA, Castro JA, Capitão LM. [Hybrid infrainguinal revascularization for critical limb ischemia]. Rev Port Cir Cardiotorac Vasc 2009; 16:91-96. [PMID: 19823706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The introduction of endovascular procedures in the routine of vascular surgery allowed for the expansion of therapeutic options in the diverse areas of vascular disease. Endoluminal revascularization can be regarded as a usefull complement of conventional surgical techniques. An above-knee femoro-popliteal bypass surgery ePTFE graft has been performed, followed by a sheath introduction on the graft body. This allows a simplified access to crural vessels, while providing efficient revascularization of the femoro-popliteal sector. Distal revascularization was performed using angioplasty and stenting when appropriate, as to insure continuous flux in at least one of the tibial or the peroneal arteries. The aim of this kind of procedure is to insure efficient femoro-popliteal revascularization and to achieve a run-off to the foot in at least one vessel. This type of intervention may be particularly attractive in Leriche-Fontaine's grade IV patients with no available autologous venous graft.
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Affiliation(s)
- F Gonçalves
- Serviço de Angiologia e Cirurgia Vascular do Hospital de Santa Marta, Lisboa
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Esteves J, Rodrigues H, Carreiro Da Costa E, Simoes H. O.166 Graves' ophthalmopathy: calibrated surgical technique. J Craniomaxillofac Surg 2008. [DOI: 10.1016/s1010-5182(08)71290-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Rodrigues H, Esteves J, Carreiro Da Costa E. P.187 Head and neck infection: surgical management over flve years. J Craniomaxillofac Surg 2008. [DOI: 10.1016/s1010-5182(08)71975-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Santos C, Peixoto A, Rocha P, Vega A, Bizarro S, Principe A, Pereira D, Rodrigues H, Henrique R, Teixeira M. Semi-quantitative transcript analysis of Portuguese breast/ovarian cancer families with the BRCA1 founder mutation R71G of Galician origin. EJC Suppl 2008. [DOI: 10.1016/s1359-6349(08)70448-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Vaz A, Sousa S, Afonso N, Rodrigues H, Pousa I. Non-endocrine responsive breast cancer in post-menopausal patients – a different approach dependent on age. EJC Suppl 2008. [DOI: 10.1016/s1359-6349(08)70577-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Cabrita S, Rodrigues H, Abreu R, Martins M, Teixeira L, Marques C, Mota F, de Oliveira CF. Magnetic resonance imaging in the preoperative staging of endometrial carcinoma. EUR J GYNAECOL ONCOL 2008; 29:135-137. [PMID: 18459546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
PURPOSE OF INVESTIGATION Magnetic resonance imaging (MRI) has emerged as an important imaging modality in the evaluation of the extension of endometrial carcinoma which is essential in planning treatment and predicting prognosis. This study aimed to assess the value of MRI in the preoperative staging of endometrial carcinoma. METHODS We included in this study 162 patients with a histological diagnosis of endometrial carcinoma who underwent MRI pelvic imaging and surgical staging. MRI images were compared with pathological findings to measure MRI's sensitivity, specificity, positive and negative predictive values and diagnostic accuracy in what concerns myometrial, cervical and lymph node invasion. RESULTS MRI differentiation of deep myometrial invasion from superficial disease agreed with pathological findings in 77% of cases, with a sensitivity of 83%, a specificity of 72% and a diagnostic accuracy of 77%. Concerning cervical invasion, MRI had a sensitivity, specificity and diagnostic accuracy of 42%, 92%, 81% respectively. In assessing lymph node invasion, MRI presented a sensitivity of just 17%, a specificity of 99% and a diagnostic accuracy of 89%. CONCLUSION Our study confirmed the high accuracy of MRI imaging in assessing myometrial and cervical invasion in endometrial carcinoma. When evaluating lymph node invasion, micrometastases are responsible for the low sensitivy of MRI.
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Affiliation(s)
- S Cabrita
- Department of Gynecology, University Hospital of Coimbra, Portugal.
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Venturini M, Paridaens R, Rossner D, Vaslamatzis MM, Nortier JWR, Salzberg M, Rodrigues H, Bell R. An open-label, multicenter study of outpatient capecitabine monotherapy in 631 patients with pretreated advanced breast cancer. Oncology 2007; 72:51-7. [PMID: 18004077 DOI: 10.1159/000111094] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2007] [Accepted: 06/29/2007] [Indexed: 12/27/2022]
Abstract
BACKGROUND Phase II/III trials have shown that capecitabine is an active, well-tolerated therapy for metastatic breast cancer (MBC). We report clinical findings from an expanded access program enabling patients ineligible for investigative trials to receive capecitabine before its approval and availability. METHODS Patients pretreated with at least two chemotherapy regimens, including a taxane, for MBC received oral capecitabine until disease progression or unacceptable toxicity. RESULTS Six hundred and thirty-one patients received capecitabine (mean duration 3.8 months, range 0.1-24.7 months). The most common treatment-related grade 3/4 toxicities were diarrhea (9%) and hand-foot syndrome (8%). Grade 3/4 alopecia was absent and grade 3/4 myelosuppression was rare. Dose was modified in 172 patients (27%). Objective response rate in 349 evaluable patients was 35%. Median time to progression (n = 604) was 6.6 months (95% confidence interval, CI, 5.6-7.6) and median overall survival (n = 569) was 10.0 months (95% CI, 8.5-15.3). CONCLUSIONS Our findings in a cohort of patients with pretreated progressive breast cancer confirm the high efficacy and tolerability of outpatient capecitabine.
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Mesquita B, Torres L, Pereira D, Rodrigues H, Susana S, Leal C, Afonso M, Henrique R, Teixeira M. 539 POSTER Genetic pathways of breast carcinomas with 17q12q21 amplification. EJC Suppl 2007. [DOI: 10.1016/s1359-6349(07)70478-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Pinto Correia A, Pinto D, Pereira D, Rodrigues H, Abreu de Sousa J, Sousa H, Sousa B, Sousa S, Lopes C, Medeiros R. 362 POSTER Pepsinogen C gene polymorphism and breast cancer: Influence on the overall survival. EJC Suppl 2007. [DOI: 10.1016/s1359-6349(07)70380-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Ferreira M, Catarino R, Sousa A, Rodrigues H, Medeiros R. 2000 ORAL Quantification of free circulating tumor DNA in plasma as a diagnostic marker for breast cancer. EJC Suppl 2007. [DOI: 10.1016/s1359-6349(07)70762-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Belo-Oliveira P, Curvo-Semedo L, Rodrigues H, Belo-Soares P, Caseiro-Alves F. Sigmoid colon perforation at CT colonography secondary to a possible obstructive mechanism: report of a case. Dis Colon Rectum 2007; 50:1478-80. [PMID: 17665253 DOI: 10.1007/s10350-007-0309-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
We report a case of colonic perforation in CT colonography, which was observed in a sigmoid colon segment contained within an inguinal hernia. At surgery, apart from the perforation, a normal large-bowel wall was found. Although rare, perforation may occur in patients with normal bowel wall, possibly resulting from a mechanical strain caused by gaseous overdistention. Radiologists performing the procedure must be aware of this possibility.
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Affiliation(s)
- Pedro Belo-Oliveira
- Department of Radiology, Coimbra University Hospital, Praceta Mota Pinto 3000-075, Coimbra, Portugal
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Donato P, Coelho P, Rodrigues H, Vigia E, Fernandes J, Caseiro-Alves F, Bernardes A. Normal vascular and biliary hepatic anatomy: 3D demonstration by multidetector CT. Surg Radiol Anat 2007; 29:575-82. [PMID: 17634856 DOI: 10.1007/s00276-007-0233-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2006] [Accepted: 06/18/2007] [Indexed: 01/08/2023]
Abstract
Due to constant innovations in radiological and surgical techniques, more accurate results are expected in the diagnostic and therapeutic procedures related to hepatic pathology. The aim of this work was to demonstrate the normal hepatic vascular and biliary anatomy using cadaveric livers and CT scans of the affected livers. Furthermore, using the CT scans, the authors intended to illustrate the most common morphological variations of the vascular and biliary anatomy. Four human cadaveric livers were injected with colored silicone mixed with radiological contrast solution in the common bile duct, in the proper hepatic artery, in the portal vein and in the inferior vena cava near the ostia of the hepatic veins (only one of these structures was injected in each liver). After obtaining the CT scans, 3D rendered models were created, which demonstrated the normal hepatic anatomy of the vascular and biliary structures. The International Anatomical Nomenclature was used for their classification (based on Couinaud's work). The 3D rendered CT models were also modified to illustrate the most common normal variations of the hepatic anatomy (found in the literature).
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Affiliation(s)
- P Donato
- University Clinic of Radiology, Coimbra University Hospital, Coimbra, Portugal
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Caseiro-Alves F, Brito J, Araujo AE, Belo-Soares P, Rodrigues H, Cipriano A, Sousa D, Mathieu D. Liver haemangioma: common and uncommon findings and how to improve the differential diagnosis. Eur Radiol 2007; 17:1544-54. [PMID: 17260159 DOI: 10.1007/s00330-006-0503-z] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2006] [Revised: 09/15/2006] [Accepted: 10/12/2006] [Indexed: 02/07/2023]
Abstract
Haemangiomas are common focal liver lesions, generally detected in the work-up of asymptomatic patients. From the pathological point of view, they can be classified as small (capillary) or large, with cavernous vascular spaces that may show thrombosis, calcifications and hyalinisation. The polymorphic imaging appearance of haemangiomas depends on their histological features and flow pattern. The widespread use of cross-sectional imaging has allowed an increased detection rate and a better characterisation of this benign tumour. Recent developments of ultrasound (US), computed tomography (CT) and magnetic resonance imaging (MRI) providing high spatial and temporal resolution, together with the use of new contrast agents and/or pulse sequences has broadened the spectrum of imaging findings, contributing to diagnostic refinement in difficult cases. The scope of the present article is to provide an overview of the range of appearances of haemangiomas, explored with recent cross-sectional imaging modalities, emphasising its atypical findings as explored by temporally resolved contrast-enhanced imaging.
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Affiliation(s)
- Filipe Caseiro-Alves
- Clínica Universitária de Imagiologia, Hospitais da Universidade de Coimbra, Praceta Mota Pinto, 3000-075 Coimbra, Portugal.
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Vilhena EM, Paiva I, Rodrigues H, Martins-da Silva A, Mendonça D. [Physiological variations in ERP300 auditory brain potentials in young adults. A sequential analysis]. Rev Neurol 2005; 41:633-5. [PMID: 16288428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
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Michelon T, Schroeder R, Fagundes I, Canabarro R, Sporleder H, Rodrigues H, Silveira J, Montagner J, Garcia V, Neumann J, Graudenz M. Clinical Relevance of Low Levels of Preformed Alloantibodies Detected by Flow Cytometry in the First Year Post–Kidney Transplantation. Transplant Proc 2005; 37:2750-2. [PMID: 16182800 DOI: 10.1016/j.transproceed.2005.05.040] [Citation(s) in RCA: 5] [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: 11/27/2022]
Abstract
OBJECTIVE To determine the prevalence of transplants performed with a false-negative cytotoxicity cross-match and to analyze the clinical relevance of alloantibodies (Ab) detected only by flow cytometry (flow). METHODS We studied 66 patients undergoing kidney transplantation from a cadaveric donor. All patients had a simultaneous negative T+AHG+DTT and B+DTT. Pretransplant sera were retrospectively analyzed by flow cytometry according to an Emory University protocol: (1) T+ and B-: Ab anti-class I; (2) T- and B+: anti-class II; (3) T+B+: anti-class I + II. Chi-square, Fisher exact, Student t test, and Kaplan Meier analyses were employed with significance assigned at P < or = .05. RESULTS The overall incidence of false-negative cytotoxicity was 33.3% (22/66), namely, 6.1% (n = 4) anti-class I; 9.1% (n = 6) anti-class II; and 18.2% (n = 12) anti-class I + II. Primary nonfunctioning grafts occurred in 6.8% (3/44) and 13.6% (3/22) negative and positive flow patients (two anti-class I + II and one class II; P = .39). The incidence of graft loss in the first year was respectively, 13.6% (6/44) and 18.2% (4/22; two anti-class II and two anti-class I + II; P = .72). Compared to flow-negative grafts, creatinine levels were significantly higher among flow-positive patients at 8 and 12 weeks. One-year graft survivals were 86.4% among negative versus 81.8% for the positive group (P = .67). CONCLUSIONS We observed that 33% of kidney transplant recipients had low levels of alloantibodies detected only by flow. This single factor was associated with the worst graft function in the first trimester with a suggestion of a higher risk for non-functioning graft.
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Affiliation(s)
- T Michelon
- Pathology Department Graduate Studies, FFFCMPA and Transplant Immunology Laboratory, Santa Casa Hospital, Porto Alegre, Brazil.
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Fagundes I, Michelon T, Schoroeder R, Fernandes S, Sporleder H, Canabarro R, Rodrigues H, Petry M, Zanenga D, Silveira J, Montagner J, Bortolotto A, Keitel E, Santos A, Garcia V, Neumann J. Immunoglobulin G–Positive in B-Cell Cross-Match Decreases Kidney Allograft Survival. Transplant Proc 2005; 37:2753-4. [PMID: 16182801 DOI: 10.1016/j.transproceed.2005.05.042] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
We retrospectively studied all 1149 transplants performed at our center between 1993 and 2003 to determine the incidence and clinical effect of pretransplant B-positive cross-match on kidney graft survival. The patients were divided in two groups: B-negative (n = 1102) and B-positive in current sera (n = 47; 4.1%). AB-positive test was more frequent among regrafted patients (14% vs 3%; P = .00). Demographic data were not different between the groups. The overall rate of graft loss was similar (26% vs 24%, respectively; P = .86). However, early nonsurgical graft losses were more frequent among B-positive patients (46% vs 20%, respectively; P = .04). IgM was the most frequent immunoglobulin in the B-positive group (76% IgM and 24% IgG). There was no significant difference between B-negative and B-positive groups in the 1-, 5-, and 10-year graft survival rates (87% vs 83%, 73% vs 78%, 64% vs 66%, respectively; P = .87). The graft survival was significantly reduced comparing an IgG anti-B cell to the B-negative group (P = .03) as well as IgG compared to IgM (P = .004). In conclusion, only B-positive cross-match due to IgG decreased graft survival. Even though it is an uncommon situation (0.9%), this study stressed the clinical value of the B-cell cross-match as a tool to identify patients with a higher immunological risk.
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Affiliation(s)
- I Fagundes
- Transplant Immunology Laboratory, Santa Casa Hospital, Porto Alegre, Brasil.
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Abstract
Breast cancer is a major public health problem around the world, and its carcinogenesis is not yet well understood. The human epidermal growth factor Receptor 2 (HER2) seems to play an important role in the development of this neoplasia, and genetic alterations in this gene, such as point mutations and polymorphisms have been detected in breast cancer patients. We analysed the frequency of a single nucleotide polymorphism in the HER2 gene in blood samples from 152 breast cancer patients and 146 healthy controls using the polymerase chain reaction methodology, followed by restriction fragment length polymorphism (PCR-RFLP). We found a twofold increase in risk of breast cancer in women who are carriers of a Val allele genotype-Ile/Val and Val/Val genotypes [odds ratio (OR)=2.00; 95% confidence interval (CI) 1.23-3.25; P=0.005]. Our results indicate an association between the presence of the Val allele in the HER2 polymorphism and the risk of breast cancer. Further studies are needed to evaluate the role of this polymorphism in the behaviour of breast cancer.
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Affiliation(s)
- D Pinto
- Molecular Oncology Unit, Instituto Português de Oncologia Francisco Gentil, Centro Regional do Porto, Portugal
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Abstract
Secretory breast carcinoma (SBC) is a rare type of invasive breast cancer. Since little is known about the biology of this rare tumour, it is useful to report every such case, in order to make as much information as possible available in the medical literature. We present the case of an 18-year-old woman with a SBC treated by mastectomy (Madden) and axillary node dissection (stage pT3N1M0) followed by chemotherapy (FEC regimen) and radiotherapy. The patient has meanwhile completed 4 years of follow-up with no evidence of recurrence. The authors review the literature and summarize relevant findings concerning definition, pathology, clinical picture, treatment, and follow-up.
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Affiliation(s)
- N M Costa
- Medical Oncology Department, Portuguese Institute of Oncology, Centre of Oporto, Rua Dr. António Bernardino de Almeida, Porto 4200-072, Portugal.
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Michelon T, Canabarro R, Sporleder H, Schroeder R, Rodrigues H, Silveira J, Montagner J, Fagundes I, Garcia VD, Neumann J, Graundenz M. LOW LEVELS OF ALOANTIBODIES DETECTED BY FLOW CYTOMETRY BEFORE KIDNEY TRANSPLANT ARE CLINICALLY IMPORTANT AT SHORT TERM FOLLOW-UP. Transplantation 2004. [DOI: 10.1097/00007890-200407271-01734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Pinto D, Vasconcelos A, Costa S, Pereira D, Rodrigues H, Lopes C, Medeiros R. HER2 polymorphism and the risk of breast and ovarian cancer. EJC Suppl 2004. [DOI: 10.1016/s1359-6349(04)90770-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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Saraiva P, Rodrigues H, Rodrigues P. Port site recurrence after laparoscopic adrenalectomy for metastatic melanoma. Int Braz J Urol 2003; 29:520-1. [PMID: 15748306 DOI: 10.1590/s1677-55382003000600007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2003] [Accepted: 08/04/2003] [Indexed: 11/22/2022] Open
Abstract
Port site metastasis after adrenal surgery is a rare entity. We describe the case of a 70-year-old man with a solitary adrenal metastasis from malignant melanoma, which was laparoscopically removed. Twelve months later, he presented a recurrence near one of the laparoscopic port sites. This lesion was surgically removed and after a 18-month follow-up, the patient presents no evidence of disease.
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Affiliation(s)
- Pedro Saraiva
- Albarran Institute of Urology, Rio de Janeiro, RJ, Brazil
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Costa S, Pereira D, Pinto D, Vasconcelos A, Rodrigues H, Medeiros R. 594 The role of XPD exon 10 polymorphism in susceptibility to ovarian and breast cancer. EJC Suppl 2003. [DOI: 10.1016/s1359-6349(03)90626-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Pinto D, Pereira D, Vasconcelos A, Costa S, Rodrigues H, Lopes C, Medeiros R. 604 HER2 polymorphism and the risk of breast cancer. EJC Suppl 2003. [DOI: 10.1016/s1359-6349(03)90636-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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