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Figueiredo P, Sanders R, Gorski T, Vilas-Boas JP, Fernandes RJ. Kinematic and electromyographic changes during 200 m front crawl at race pace. Int J Sports Med 2012; 34:49-55. [PMID: 22903317 DOI: 10.1055/s-0032-1321889] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
The purpose of this study was to analyse eventual kinematic and electromyographic changes during a maximal 200 m front crawl at race pace. 10 male international level swimmers performed a 200 m maximal front crawl test. Images were recorded by 2 above and 4 under water cameras, and electromyographic signals (EMG) of 7 upper and lower limbs muscles were analysed for 1 stroke cycle in each 50 m lap. Capillary blood lactate concentrations were collected before and after the test. The variables of interest were: swimming speed, stroke length, stroke and kick frequency, hand angular velocity, upper limb and foot displacement, elbow angle, shoulder and roll angle, duration of stroke phases, and EMG for each muscle in each stroke phase. Generally, the kinematic parameters decreased, and a relative duration increased for the entry and pull phases and decreased for the recovery phase. Muscle activation of flexor carpi radialis, biceps brachii, triceps brachii, peitoral major and upper trapezius increased during specific stroke phases over the test. Blood lactate concentration increased significantly after the test. These findings suggest the occurrence of fatigue, characterised by changes in kinematic parameters and selective changes in upper limbs muscle activation according to muscle action.
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Affiliation(s)
- P Figueiredo
- Centre of Research, Education, Innovation and Intervention in Sport, Faculty of Sport, University of Porto, Porto, Portugal.
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Monsanto P, Lérias C, Almeida N, Lopes S, Cabral JE, Figueiredo P, Silva M, Julião M, Gouveia H, Sofia C. Intestinal nodular lymphoid hyperplasia and extraintestinal lymphoma--a rare association. Acta Gastroenterol Belg 2012; 75:260-262. [PMID: 22870792] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Nodular lymphoid hyperplasia of the gastrointestinal tract is characterized by the presence of innumerable small discrete nodules involving a variable segment of the gastrointestinal tract. The association between nodular lymphoid hyperplasia and other benign and malignant diseases has been clearly described, with an increased risk of gastrointestinal tumours, namely gastrointestinal lymphoma. However, the association with extraintestinal lymphoma seems extremely rare. The authors present a clinical case of a patient with nodular lymphoid hyperplasia of the small and large intestine that subsequently developed an extraintestinal lymphoma (diffuse large B-cell lymphoma).
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Affiliation(s)
- P Monsanto
- Gastroenterology Department, Coimbra University Hospital, Coimbra, Portugal.
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Moura V, Lacerda M, Figueiredo P, Corvo ML, Cruz MEM, Soares R, de Lima MCP, Simões S, Moreira JN. Targeted and intracellular triggered delivery of therapeutics to cancer cells and the tumor microenvironment: impact on the treatment of breast cancer. Breast Cancer Res Treat 2012; 133:61-73. [PMID: 21805188 DOI: 10.1007/s10549-011-1688-7] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2011] [Accepted: 07/15/2011] [Indexed: 01/30/2023]
Abstract
Limiting tumor invasion to the surrounding healthy tissues has proven to be clinically relevant for anticancer treatment options. We have demonstrated that, within a solid tumor, it is possible to achieve such a goal with the same nanoparticle by intracellular and triggered targeted drug delivery to more than one cell population. We have identified the nucleolin receptor in endothelial and cancer cells in tissue samples from breast cancer patients, which enabled the design of a F3-peptide-targeted sterically stabilized pH-sensitive liposome. The clinical potential of such strategy was demonstrated by the successful specific cellular association by breast cancer cells harvested from tumors of patients submitted to mastectomy. In vitro, the nanoparticle targeted the nucleolin receptor on a cell and ligand-specific manner and improved cytotoxicity of doxorubicin (used as a model drug) towards breast cancer and endothelial cells by 177- and 162-fold, respectively, relative to the commercially available non-targeted non-pH-sensitive liposomes. Moreover, active accumulation of F3-targeted pH-sensitive liposomes into human orthotopic tumors, implanted in the mammary fat pad of nude mice, was registered for a time point as short as 4 h, reaching 48% of the injected dose/g of tissue. Twenty-four hours post-injection the accumulation of the dual-targeted pH-sensitive nanoparticle in the tumor tissue was 33-fold higher than the non-targeted non-pH-sensitive counterpart. In mice treated with the developed targeted nanoparticle significant decrease of the tumor viable rim area and microvascular density, as well as limited invasion to surrounding healthy tissues were observed (as opposed to other tested controls), which may increase the probability of tumors falling in the category of "negative margins" with reduced risk of relapse.
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Affiliation(s)
- Vera Moura
- Center for Neuroscience and Cell Biology, University of Coimbra, Largo Marquês de Pombal, 3004-517 Coimbra, Portugal
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Gomes B, Mourão L, Massart A, Figueiredo P, Vilas-Boas J, Santos A, Fernandes R. Gross Efficiency and Energy Expenditure in Kayak Ergometer Exercise. Int J Sports Med 2012; 33:654-60. [DOI: 10.1055/s-0032-1301907] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- B. Gomes
- University of Coimbra, Faculty of Sport Sciences and Physical Education, CIDAF, Coimbra, Portugal
| | - L. Mourão
- Porto Polytechnic Institute, Industrial Studies and Management Superior School, Vila do Conde, Portugal
| | - A. Massart
- University of Coimbra, Faculty of Sport Sciences and Physical Education, CIDAF, Coimbra, Portugal
| | - P. Figueiredo
- University of Porto, Faculty of Sport, CIFI2D, Porto, Portugal
| | - J. Vilas-Boas
- University of Porto, Faculty of Sport, CIFI2D, Porto, Portugal
- University of Porto, LABIOMEP, Porto, Portugal
| | - A.M. Santos
- University of Coimbra, Faculty of Sport Sciences and Physical Education, CIDAF, Coimbra, Portugal
| | - R. Fernandes
- University of Porto, Faculty of Sport, CIFI2D, Porto, Portugal
- University of Porto, LABIOMEP, Porto, Portugal
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Roncon-Albuquerque R, Basílio C, Figueiredo P, Silva S, Mergulhão P, Alves C, Veiga R, Castelo-Branco S, Paiva L, Santos L, Honrado T, Dias C, Oliveira T, Sarmento A, Mota AM, Paiva JA. Portable miniaturized extracorporeal membrane oxygenation systems for H1N1-related severe acute respiratory distress syndrome: a case series. J Crit Care 2012; 27:454-63. [PMID: 22386225 DOI: 10.1016/j.jcrc.2012.01.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2011] [Revised: 01/17/2012] [Accepted: 01/22/2012] [Indexed: 01/19/2023]
Abstract
BACKGROUND Technological advances improved the practice of "modern" extracorporeal membrane oxygenation (ECMO). In the present report, we describe the experience of a referral ECMO center using portable miniaturized ECMO systems for H1N1-related severe acute respiratory distress syndrome (ARDS). METHODS An observational study of all patients with H1N1-associated ARDS treated with ECMO in Hospital S. João (Porto, Portugal) between November 2009 and April 2011 was performed. Extracorporeal membrane oxygenation support was established using either ELS or Cardiohelp systems (Maquet-Cardiopulmonary-AG, Hirrlingen, Germany). RESULTS Ten adult patients with severe ARDS secondary to H1N1 infection (Pao(2)/fraction of inspired oxygen, 69 mm Hg [56-84]; Murray score, 3.5 [3.5-3.8]) were included, and 60% survived to hospital discharge. Five patients were uneventfully transferred on ECMO from referring hospitals to our center by ambulance. Six patients were treated during the first postpandemic influenza season. All patients were treated with oseltamivir, and 1 received in addition zanamivir. Four patients received corticosteroids. Nosocomial infection was the most common complication (40%). Of the 4 deaths, 2 were caused by hemorrhagic shock; 1, by irreversible multiple organ failure; and 1, by refractory septic shock. CONCLUSION In our experience, ECMO support was a valuable therapeutic option for H1N1-related severe ARDS. The use of portable miniaturized systems allowed urgent rescue of patients from referring hospitals and safe interhospital and intrahospital transport during ECMO support.
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Figueiredo P, Kjendlie PL, Vilas-Boas J, Fernandes R. Intracycle Velocity Variation of the Body Centre of Mass in Front Crawl. Int J Sports Med 2012; 33:285-90. [DOI: 10.1055/s-0031-1301323] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- P. Figueiredo
- Centre of Research, Education, Innovation and Intervention in Sport, Faculty of Sport, University of Porto, Porto, Portugal
- Porto Biomechanics Laboratory, University of Porto, Porto, Portugal
| | - P.-L. Kjendlie
- Vestfold University College, Department of Physical Performance, Tønsberg, Norway
| | - J. Vilas-Boas
- Centre of Research, Education, Innovation and Intervention in Sport, Faculty of Sport, University of Porto, Porto, Portugal
- Porto Biomechanics Laboratory, University of Porto, Porto, Portugal
| | - R. Fernandes
- Centre of Research, Education, Innovation and Intervention in Sport, Faculty of Sport, University of Porto, Porto, Portugal
- Porto Biomechanics Laboratory, University of Porto, Porto, Portugal
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Carvalho D, Azevedo C, Coelho R, Ferreira A, Figueiredo P, Santos L, Sarmento A. [Acute acalculous cholecystitis in a patient with severe malaria]. ACTA MEDICA PORT 2011; 24 Suppl 3:631-634. [PMID: 22856401] [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: 06/01/2023]
Abstract
The authors present a clinical case of a 53 years old male admited in an ICU - DI (Intensive care Unit of Infectious Disease) with the diagnosis of severe malaria. He was treated with IV quinine di-hydrochloride and doxycycline and developed on the sixth day an acute alithiasic cholecystitis. Transhepatic percutaneous drainage was performed and the patient had good clinical outcome.
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Affiliation(s)
- Dina Carvalho
- Serviço de Medicina Interna, Centro Hospitalar de Trás-os-Montes e Alto Douro, Vila Real, Portugal
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Sousa AC, Figueiredo P, Oliveira NL, Oliveira J, Silva AJ, Keskinen KL, Rodríguez FA, Machado LJ, Vilas-Boas JP, Fernandes RJ. V˙O2Kinetics in 200-m Race-Pace Front Crawl Swimming. Int J Sports Med 2011; 32:765-70. [DOI: 10.1055/s-0031-1279772] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [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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de Jesus K, de Jesus K, Figueiredo P, Gonçalves P, Pereira S, Vilas-Boas JP, Fernandes RJ. Biomechanical Analysis of Backstroke Swimming Starts. Int J Sports Med 2011; 32:546-51. [DOI: 10.1055/s-0031-1273688] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Vilela P, Pimentel M, Sousa I, Figueiredo P. Quantification of Perfusion Changes during a Motor Task Using Arterial Spin Labeling. Neuroradiol J 2011; 24:85-91. [PMID: 24059575 DOI: 10.1177/197140091102400113] [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] [Received: 10/04/2010] [Accepted: 01/03/2011] [Indexed: 11/15/2022] Open
Abstract
Arterial spin labeling (ASL) is a non-invasive MRI technique that allows the quantitative measurement of perfusion, (regional cerebral blood flow (rCBF)). The ASL techniques use the labeling of the blood, by inverting or saturating the spins of water molecules of the blood supplying the imaged region. When reaching the capillary bed, these will be exchanged with tissue water giving rise to a perfusion-weighted signal. The subtraction of control (without label) from labeled images yields a signal difference that directly reflects the local perfusion. Being a non-invasive method, it can be repeated as many times as needed allowing the brain perfusion variation quantification associated with endogenous and exogenous stimuli. In this study, the authors have evaluated the CBF variation induced by the neural activity during a common motor task. The study was conducted on a Siemens Verio 3T system using a 12-channel head coil and a pulsed ASL Q2TIPS-PICORE sequence with a GE-EPI readout. The sequences were driven in 3D PACE mode for prospective motion correction. Fifteen healthy volunteers were studied using a simple motor task consisting in sequential thumb-digit opposition. Two different functional ASL protocols were used: #1 one perfusion scan was obtained during rest and another one during an equal period of motor task (total scan time ~8 min) (TI1 = 700 ms, TI1s = 1600 ms, TI2 =1800 ms; 91 Interleaved tag and control volumes were acquired; TR/TE = 2500/25 ms and flip angle = 90°; nine contiguous axial slices of 8 mm thickness acquired in-line with the AC-PC axis, positioned from the vertex of the brain to the top of cerebellum; FOV = 256 × 256 mm(2); matrix 64 × 64; gap between the labeling slab and the proximal 18.8 mm) and #2 a block design alternating five 25s periods of motor task with five 25s periods of rest (total scan time ~4 min) (TI1 = 700 ms, TI1s = 1600 ms, TI2 = 1800 ms; 101 interleaved tag and control volumes were acquired; TR/TE = 2500/11 ms and flip angle = 90°; nine contiguous axial slices of 6 mm thickness acquired in-line with the AC-PC axis, positioned from the vertex of the brain to the top of cerebellum; FOV = 256 × 256 mm(2) ; matrix 64 × 64; gap between the labeling slab and the proximal 18.8 mm). The post-processing was performed using FSL (www.fmrib.ox.uk/fsl). The mean CBF values obtained for protocols #1 / #2 were: CBFrest = 61.0 / 69.4 ml/100g/min; CBFactivation = 104.8 / 109.9 ml/100g/min; and CBFvariation = CBFactivation - CBFrest = 43.7 / 40.5 ml/100g/min. The relative perfusion changes during activation [defined as CBFvariation / CBFrest (%)] were 73±6 % and 62±7 % (mean±SE) for protocols #1 and #2, respectively. These results show that both activation vs rest and block design functional protocols were capable to detect consistent variations in perfusion associated with a simple motor task. However, the block design has the advantages of requiring shorter acquisitions, directly comparing rest and activation conditions and allowing the acquisition of simultaneous Blood oxygenation level dependent (BOLD) contrast information, while still providing comparable results with the more conventional activation vs rest protocol. In conclusion, our results indicate that a block design ASL-BOLD protocol may be a preferable approach for the evaluation of perfusion changes to endogenous stimuli.
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Affiliation(s)
- P Vilela
- Imaging Department, Hospital da Luz; Lisbon, Portugal -
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Abstract
The problem of model falsification or model invalidation appears in several areas where we are interested in distinguishing among an eligible set of dynamic systems. In the context of fMRI studies of brain activity, modeling the haemodynamic response function (HRF) is a critical step. The estimation of the dynamic system describing a biophysical model of the HRF may leave much uncertainty on the exact values of the parameters. Moreover, the high noise levels in the data may hinder the model identification task. Therefore, this paper proposes a systematic tool to address the problem of the distinguishability among a set of physiologically plausible HRF models. The concept of absolutely input distinguishable systems is introduced and applied to the HRF model, by exploiting the structure of the underlying nonlinear dynamic system. A strategy to model uncertainty in the input time delay and magnitude is developed and its impact on the distinguishability of two physiologically plausible HRF models is determined, in terms of the maximum noise amplitude above which it is not possible to guarantee the falsification of one model in relation to the other. Finally, a methodology is proposed for the choice of the input sequence, or experimental paradigm, that should be used in order to maximize the distinguishability of the HRF models under investigation. The proposed approach may be used to assess the performance of HRF model identification techniques from fMRI data.
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Affiliation(s)
- C Silvestre
- Institute for Systems and Robotics - Instituto Superior Tecnico, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal.
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Silvestre C, Figueiredo P, Rosa P. Multiple-Model Set-Valued Observers: a new tool for HRF model selection in fMRI. Annu Int Conf IEEE Eng Med Biol Soc 2011; 2010:5704-7. [PMID: 21097322 DOI: 10.1109/iembs.2010.5627877] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
This paper proposes a new approach for the selection of a biophysical model describing the haemodynamic response function (HRF) measured in BOLD-fMRI data, based on model falsification techniques. Specifically, the novel method of Multiple Model Set-Valued Observers (MMSVOs) is introduced. The observers consider that the initial state lives in a set, the linear time-varying dynamic system obtained from a bilinear approximation of the nonlinear HRF model about the nominal input signal is uncertain, and the output measurements are corrupted by bounded noise. It is shown, both theoretically and through simulation, that the proposed method is able to successfully distinguish the correct HRF model among a set of physiologically plausible alternatives. Moreover, the feasibility of the technique is demonstrated by its application to an empirical dataset. In summary, the results obtained clearly indicate that the proposed methodology is potentially well-suited to be used in the modeling of BOLD-fMRI data.
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Affiliation(s)
- C Silvestre
- Institute for Systems and Robotics - Instituto Superior Tecnico, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal.
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Abstract
The aim of the present study was to analyze the lifelong differences of femur structure in sedentary and physically active animal models. Thirty male C57BL/6 mice, 2 months old, were either: i) housed in cages with running wheel (AA; n=10), ii) housed in cages without running wheel (AS; n=10), iii) or sacrificed without intervention (Y; n=10). AA and AS animals were sacrificed after 23 months of housing. Right femur structure was analyzed in all animals by histomorphometry. Significant differences in several microarchitectural parameters of cancellous and cortical bone were identified between Y mice and both groups of aged mice, as well as between AA and AS groups. Lifelong physically active mice had significantly higher cancellous bone surface (Cn.BS) and trabecular number (Tb.N) and decreased trabecular separation (Tb.Sp) at both epiphyses when compared to AS animals. No differences were observed between Y and AA groups regarding osteocyte number (N.Ot) despite its significant reduction in AS animals, suggesting that age alone was not a cause for decreases in N.Ot. Our results suggest that the reduced bone quality observed in the elderly is not only a consequence of age but also of lack of physical activity since sedentary behaviour significantly aggravated the degenerative age-related bone differences.
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Affiliation(s)
- H Fonseca
- FADEUP, Biochemistry, Porto, Portugal.
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de Mello RA, Figueiredo P, Marques M, Sousa G, Carvalho T, Gervásio H. Concurrent breast stroma sarcoma and breast carcinoma: a case report. J Med Case Rep 2010; 4:414. [PMID: 21182764 PMCID: PMC3022674 DOI: 10.1186/1752-1947-4-414] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2010] [Accepted: 12/23/2010] [Indexed: 11/30/2022] Open
Abstract
Introduction Breast cancer is one of the most important health problems in the world and affects a great number of women over the entire globe. This group of tumors rarely presents as bilateral disease and, when it does happen, normally occurs within the same histological type. We report a rare case of concurrent bilateral breast cancer with two different histology types, a breast carcinoma and a breast sarcoma, in a 42-year-old woman referred to our hospital. Case presentation A 42-year-old Caucasian woman admitted to our institute in August 1999, presented with a nodule in the left breast of 3.0 × 2.5 cm, and, in the right breast, one of 1.0 cm, suspected of malignancy and with a clinically negative armpit. Biopsies had revealed invasive mammary carcinoma (right breast) and sarcoma (left breast). She was submitted to bilateral modified radical mastectomy. A histological study showed an invasive mammary carcinoma degree II lobular pleomorphic type with invasion of seven of the 19 excised axillary nodes in the right breast and, in the left breast, a sarcoma of the mammary stroma, for which the immunohistochemistry study was negative for epithelial biomarkers and positive for vimentin. Later, she was submitted for chemotherapy (six cycles of 75 mg/m2 5-fluorouracil, epirubicin and cyclophosphamide) followed by radiotherapy of the thoracic wall and axillary nodes on the left. Hormone receptors were positive in the tumor of the right breast, and tamoxifen, 20 mg, was prescribed on a daily basis (five years) followed by letrozole, 2.5 mg, also daily (five years). She presented no sign of negative evolution in the last consultation. Conclusion The risk of development of bilateral breast cancer is about 1% each year within a similar histological type, but it is higher in tumors with lobular histology. In this case, the patient presented, simultaneously, two histologically distinct tumors, thus evidencing a rare situation.
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Affiliation(s)
- Ramon Andrade de Mello
- Department of Medical Oncology, Instituto Português de Oncologia de Coimbra, Francisco Gentil, Avenida Bissaya Barreto, 98, 3000-075, Coimbra, Portugal.
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Moura V, Lacerda M, Figueiredo P, Corvo ML, Cruz MEM, de Lima MCP, Simões S, Moreira JN. Targeting non-viral vectors to tumor cells and the tumor microenvironment. BMC Proc 2010. [DOI: 10.1186/1753-6561-4-s2-o26] [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: 11/10/2022] Open
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66
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Peixoto P, Amaro P, Sadio A, Figueiredo P, Almeida N, Gouveia H, Coutinho L, Barros A, Silva MR, Leitão MC. A strange duodenal lesion. Rev Esp Enferm Dig 2010; 102:563-5. [PMID: 20883077 DOI: 10.4321/s1130-01082010000900012] [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] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Moura V, Lacerda M, Figueiredo P, Corvo ML, Cruz MEM, de Lima MCP, Simões S, Moreira JN. Targeting non-viral vectors to tumor cells and the tumor microenvironment. BMC Proc 2010. [PMCID: PMC3254993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- Vera Moura
- Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal ,Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Manuela Lacerda
- Portuguese Institute of Oncology Francisco Gentil, Coimbra, Portugal
| | - Paulo Figueiredo
- Portuguese Institute of Oncology Francisco Gentil, Coimbra, Portugal
| | - M Luísa Corvo
- Research Institute for Medicines and Pharmaceutical Sciences, Faculty of Pharmacy, University of Lisbon, Lisbon, Portugal
| | - M Eugénia M Cruz
- Research Institute for Medicines and Pharmaceutical Sciences, Faculty of Pharmacy, University of Lisbon, Lisbon, Portugal
| | - M Conceição P de Lima
- Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal ,Department of Life Sciences, University of Coimbra, Coimbra, Portugal
| | - Sérgio Simões
- Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal ,Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - João N Moreira
- Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal ,Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
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Lopes S, Figueiredo P, Amaro P, Freire P, Alves S, Cipriano MA, Gouveia H, Sofia C, Correia-Leitão M. Glycogenic acanthosis of the esophagus: an unusually endoscopic appearance. Rev Esp Enferm Dig 2010; 102:341-2. [PMID: 20524767 DOI: 10.4321/s1130-01082010000500013] [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] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Sousa A, Figueiredo P, Oliveira N, Oliveira J, Keskinen KL, Vilas-Boas JP, Fernandes RJ. Comparison Between Swimming VO2peak and VO2max at Different Time Intervals~!2009-07-05~!2009-12-12~!2010-04-15~! ACTA ACUST UNITED AC 2010. [DOI: 10.2174/1875399x01003010022] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Cardoso JC, Reis JP, Figueiredo P, Tellechea O. Infundibulomatosis: a case report with immunohistochemical study and literature review. Dermatol Online J 2010; 16:14. [PMID: 20137756] [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: 05/28/2023] Open
Abstract
Tumor of the follicular infundibulum was first described in 1961 by Mehregan and Butler in a patient presenting with multiple papules. It is more frequent, however, as an isolated lesion affecting mainly the face, neck, and upper trunk. Clinical presentation is variable, requiring histology for the diagnosis, which reveals typically a plate-like proliferation of keratinocytes in continuity with the epidermis and hair follicles; some morphological features are reminiscent of the outer root sheath of the hair follicle. A well defined network of elastic fibers surrounding the tumor is usually present using the appropriate staining and this finding is specific because it is not found in other benign follicular tumors. Multiple infundibulomas are usually sporadic and there is no apparent association with internal malignancy. The authors report the case of a 30-year-old female patient with a 5-year history of multiple small discrete hypopigmented macules and papules, scattered over the submental and submaxillary regions and anterior neck. Histopathological findings were consistent with the diagnosis of tumor of the follicular infundibulum. Immunohistochemical study was performed to further characterize the proliferation.
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Cardoso JC, Reis JP, Figueiredo P, Tellechea Ó. Infundibulomatosis: A case report with immunohistochemical study and literature review. Dermatol Online J 2010. [DOI: 10.5070/d360w0p3m9] [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: 11/08/2022] Open
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Figueiredo P, Vilas Boas JP, Maia J, Gonçalves P, Fernandes RJ. Does the Hip Reflect the Centre of Mass Swimming Kinematics? Int J Sports Med 2009; 30:779-81. [DOI: 10.1055/s-0029-1234059] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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73
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74
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Almeida N, Figueiredo P, Lopes S, Freire P, Lérias C, Gouveia H, Correia Leitão M. Capsule endoscopy assisted by traditional upper endoscopy. Rev Esp Enferm Dig 2009; 100:758-63. [PMID: 19222334 DOI: 10.4321/s1130-01082008001200004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
BACKGROUND AND AIMS Capsule endoscopy (CE) can be prevented by difficulties in swallowing the device and/or its gastric retention. In such cases, endoscopic delivery of the capsule to duodenum is very useful. We describe the indications and outcomes of cases in which traditional endoscopic techniques allowed placement of the capsule in duodenum. PATIENTS AND METHODS This is a retrospective, descriptive case series. All patients in the above conditions were identified and indications for CE, endoscopic-placement technique, complications and completeness of small bowel imaging were registered. RESULTS Endoscopic-assisted delivery of the capsule was necessary in 13 patients (2.1% of all CE; 7 males; mean age--47.9 +/- 24.9 years, range 13 to 79 years). Indications for endoscopic delivery included: inability to swallow the capsule (7), gastric retention in previous exams (3), abnormal upper gastrointestinal anatomy (3). In eight patients, the capsule was introduced in GI tract with: foreign body retrieval net alone (3), retrieval net and a translucent cap (2), prototype delivery device (2) or a polypectomy snare (1). Five patients ingested the capsule that was then placed in duodenum with a polypectomy snare (3) or a retrieval net (2). No major complications occurred. Complete small bowel examination was possible in 10 patients (77%). CONCLUSIONS Endoscopic placement of capsule endoscope in the duodenum is rarely needed. However it may be safely performed by different techniques avoiding some limitations of CE. The best methods for endoscopic delivery of the capsule in the duodenum seem to be retrieval net with a translucent cap when the patient is unable to swallow the device or a retrieval net only to capture the capsule in the stomach when the patients swallows it easily.
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Affiliation(s)
- N Almeida
- Department of Gastroenterology, Coimbra University Hospital, Coimbra, Portugal.
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75
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Almeida N, Figueiredo P, Freire P, Lopes S, Portela F, Ferreira M, Gouveia H, Correia Leitão M. Simultaneous failure of Pillcam Colon and Pillcam SB. Rev Esp Enferm Dig 2008; 100:731-733. [PMID: 19159181] [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: 05/27/2023]
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76
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Prazeres HJ, Rodrigues F, Soares P, Naidenov P, Figueiredo P, Campos B, Lacerda M, Martins TC. Loss of heterozygosity at 19p13.2 and 2q21 in tumours from familial clusters of non-medullary thyroid carcinoma. Fam Cancer 2007; 7:141-9. [PMID: 17823852 DOI: 10.1007/s10689-007-9160-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2006] [Accepted: 08/21/2007] [Indexed: 10/22/2022]
Abstract
Linkage studies have identified susceptibility loci for familial nonmedullary thyroid cancer (FNMTC), with and without cell oxyphilia, at chromosomal regions 19p13.2 and 2q21. There are few genetic analyses of FNMTC tumours reported at the present time and the eventual gene involved was not identified yet. The aim of this study was to assess the occurrence of loss of heterozygosity (LOH) at these loci in the tumours from familial clusters of NMTC. We have analysed LOH in 14 tumours from 9 two-case familial clusters of NMTC. Using paired blood (normal) and tumour DNA samples, we have genotyped ten microsatellite and one SNP markers throughout 19p13.2 and fourteen microsatellite markers at 2q21. Overall, eight (57%) and two (14%) out of the fourteen tumours analysed exhibited LOH at 19p13.2 and 2q21, respectively. In two families (22%), LOH for the same markers was demonstrable in the tumours of the two members of the same family. In one family (11%) LOH was demonstrable at both loci analysed. In four two-case familial clusters (44%), LOH at the 19p13.2 locus was found in only one of the tumour cases analysed. Detailed haplotype analysis showed that, in two families (22%), the pattern of LOH in tumours was consistent with selective retention of the haplotype shared by affected members. In the remaining cases, it was consistent with random allelic losses. In conclusion, we report the finding of LOH at the 19p13.2 and 2q21 loci in tumours from familial clusters of NMTC, providing evidence that inactivation of putative genes in these regions, acting as tumour-suppressors, may be involved in the development of tumours in the context of FNMTC.
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Affiliation(s)
- Hugo João Prazeres
- Molecular Pathology Laboratory, Portuguese Institute of Oncology of Coimbra FG, EPE, Avenida Bissaya Barreto, 98, 3000-075, Coimbra, Portugal.
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77
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Cserni G, Bianchi S, Vezzosi V, Arisio R, Peterse JL, Sapino A, Castellano I, Drijkoningen M, Kulka J, Eusebi V, Foschini MP, Bellocq JP, Marin C, Thorstenson S, Amendoeira I, Reiner-Concin A, Decker T, Lacerda M, Figueiredo P. Validation of clinical prediction rules for a low probability of nonsentinel and extensive lymph node involvement in breast cancer patients. Am J Surg 2007; 194:288-93. [PMID: 17693268 DOI: 10.1016/j.amjsurg.2007.02.014] [Citation(s) in RCA: 12] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2006] [Revised: 02/01/2007] [Accepted: 02/05/2007] [Indexed: 11/29/2022]
Abstract
BACKGROUND Two recently developed clinical prediction rules aim to anticipate the lack of nonsentinel lymph node metastases and the involvement of less than 4 lymph nodes in breast cancer patients with positive sentinel lymph nodes (SLNs). METHODS The University of Louisville Breast SLN Study clinical prediction rules were validated on an independent set of SLN-positive patients with tumors < or = 15 mm. RESULTS The data on 475 and 473 patients, respectively, were used for the validation. The areas under the receiver operating characteristic curves were similar to the originals for both predictive tools (.70 and .76). The lowest score of 1 identified 5 of 7 patients with disease limited to the SLNs and 161 of 165 as having less than 4 involved lymph nodes. CONCLUSIONS A subset of patients with SLN-only involvement and less than 4 metastatic lymph nodes can probably be identified by means of the Louisville clinical prediction rules, but prediction of the lack of non-SLN metastasis seems less reliable.
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Affiliation(s)
- Gábor Cserni
- Department of Surgical Pathology, Bács-Kiskun County Teaching Hospital, Nyiri út 38, H-6000 Kecskemét, Hungary.
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78
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Areia M, Amaro P, Figueiredo P, Portela F, Ferreira M, Rosa A, Romãozinho JM, Gouveia H, Freitas D. [Spontaneous extensive esophageal tear with upper digestive haemorrhage treated by endoclip application]. Rev Esp Enferm Dig 2007; 99:233-4. [PMID: 17590107 DOI: 10.4321/s1130-01082007000400009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- M Areia
- Departamento de Gastroenterología, Hospital Universitario de Coimbra, Coimbra, Portugal
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79
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Cunha N, Rodrigues F, Curado F, Ilhéu O, Cruz C, Naidenov P, Rascão MJ, Ganho J, Gomes I, Pereira H, Real O, Figueiredo P, Campos B, Valido F. Thyroglobulin detection in fine-needle aspirates of cervical lymph nodes: a technique for the diagnosis of metastatic differentiated thyroid cancer. Eur J Endocrinol 2007; 157:101-7. [PMID: 17609408 DOI: 10.1530/eje-07-0088] [Citation(s) in RCA: 126] [Impact Index Per Article: 7.4] [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: 11/08/2022]
Abstract
BACKGROUND Fine-needle aspiration cytology is frequently used for differential diagnosis of neck masses of unknown origin. Inconclusive and even false-negative results are not uncommon. AIM To evaluate the utility of thyroglobulin (Tg) measurement in fine-needle aspirates (FNA-Tg) for detecting cervical lymph node (CLNs) metastases from differentiated thyroid carcinomas. METHODS An ultrasound-guided fine-needle aspiration was done in 67 patients with 83 suspicious enlarged CLNs to obtain material for cytology and Tg measurement in the needle washout, using an immunometric chemiluminescent assay. Measurement of anti-Tg antibodies (FNA-TgAb) was also carried out in half of all the aspirates. Subjects were divided into two groups: one of 16 patients awaiting thyroidectomy and the other of 51 patients in follow-up after surgery. RESULTS The first group of patients had positive FNA biopsy (FNAB-Tg) in 14 out of the 18 studied CLNs with a range of 3.2-43 352 ng/ml, while FNAB-cytology indicated metastasis in only 8 out of the 14 CLNs with positive histology. A total of 65 CLNs were studied in the follow-up group. Lymphadenectomy was performed in 23 patients and 28 aspirated CLNs were removed. Histology confirmed the diagnosis of metastasis suggested by FNAB-Tg in 20 CLNs and of reactive lymphadenitis in the remaining 8 CLNs. FNAB-cytology was positive in only 11 CLNs. Sensitivity of FNAB-Tg was not affected by the studied FNAB-TgAb. CONCLUSIONS The FNAB-Tg achieved a sensitivity of 100% in both groups. FNAB-Tg is an easy and inexpensive technique which proved to increase the diagnostic of cytology in the early diagnosis of papillary carcinoma recurrence to CLN even in the presence of serum TgAb.
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Affiliation(s)
- Nuno Cunha
- Serviço de Patologia Clínica, Instituto Português de Oncologia de Coimbra Francisco Gentil, EPE, Av. Bissaya Barreto, 98, 3000 Coimbra, Portugal.
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80
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Cserni G, Bianchi S, Vezzosi V, Arisio R, Bori R, Peterse JL, Sapino A, Castellano I, Drijkoningen M, Kulka J, Eusebi V, Foschini MP, Bellocq JP, Marin C, Thorstenson S, Amendoeira I, Reiner-Concin A, Decker T, Lacerda M, Figueiredo P, Fejes G. Sentinel lymph node biopsy in staging small (up to 15 mm) breast carcinomas. Results from a European multi-institutional study. Pathol Oncol Res 2007; 13:5-14. [PMID: 17387383 DOI: 10.1007/bf02893435] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [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] [Received: 11/29/2006] [Accepted: 01/29/2007] [Indexed: 02/06/2023]
Abstract
Sentinel lymph node (SLN) biopsy has become the preferred method for the nodal staging of early breast cancer, but controversy exists regarding its universal use and consequences in small tumors. 2929 cases of breast carcinomas not larger than 15 mm and staged with SLN biopsy with or without axillary dissection were collected from the authors' institutions. The pathology of the SLNs included multilevel hematoxylin and eosin (HE) staining. Cytokeratin immunohistochemistry (IHC) was commonly used for cases negative with HE staining. Variables influencing SLN involvement and non-SLN involvement were studied with logistic regression. Factors that influenced SLN involvement included tumor size, multifocality, grade and age. Small tumors up to 4 mm (including in situ and microinvasive carcinomas) seem to have SLN involvement in less than 10%. Non-SLN metastases were associated with tumor grade, the ratio of involved SLNs and SLN involvement type. Isolated tumor cells were not likely to be associated with further nodal load, whereas micrometastases had some subsets with low risk of non-SLN involvement and subsets with higher proportion of further nodal spread. In situ and microinvasive carcinomas have a very low risk of SLN involvement, therefore, these tumors might not need SLN biopsy for staging, and this may be the approach used for very small invasive carcinomas. If an SLN is involved, isolated tumor cells are rarely if ever associated with non-SLN metastases, and subsets of micrometastatic SLN involvement may be approached similarly. With macrometastases the risk of non-SLN involvement increases, and further axillary treatment should be generally indicated.
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Affiliation(s)
- Gábor Cserni
- Department of Pathology, Bács-Kiskun County Teaching Hospital, Kecskemét, H-6000, Hungary.
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81
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Prazeres HJ, Rodrigues F, Figueiredo P, Naidenov P, Soares P, Bugalho MJ, Lacerda M, Campos B, Martins TC. Occurrence of the Cys611Tyr mutation and a novel Arg886Trp substitution in the RET proto-oncogene in multiple endocrine neoplasia type 2 families and sporadic medullary thyroid carcinoma cases originating from the central region of Portugal. Clin Endocrinol (Oxf) 2006; 64:659-66. [PMID: 16712668 DOI: 10.1111/j.1365-2265.2006.02524.x] [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] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
OBJECTIVE Medullary thyroid carcinoma (MTC) occurs both sporadically and in the context of autosomal dominantly inherited multiple endocrine neoplasia type 2 (MEN2) syndromes: MEN2A, MEN2B, and familial medullary thyroid carcinoma (FMTC), which are caused by activating germline mutations in the RET proto-oncogene. The aim of this study was to characterize the RET mutational spectrum in MEN2 families and apparently sporadic MTC (AS-MTC) cases originating from the central region of Portugal. SUBJECTS AND METHODS We studied a total of 82 individuals (64 affected and 18 family members), comprising five MEN2 families (four MEN2A and one MEN2B), as well as 53 AS-MTC cases. RET germline mutations were screened using PCR-DNA sequencing, SSCP and RFLP. The haplotypes associated with recurrent mutations were determined by fragment analysis of microsatellite markers, and by RFLP, in the case of intragenic polymorphisms. RESULTS Frequency of the Cys611Tyr (TGC-TAC) mutation was significantly increased in this region of Portugal, due to the fact that three apparently unrelated MEN2A/FMTC families, out of the five in which mutations were identified, harboured this specific mutation. Haplotype analysis revealed that a common haplotype was shared between two of these three families. We have also characterized a novel RET mutation, Arg886Trp, located in the tyrosine kinase domain, which was found in an AS-MTC case. CONCLUSIONS There are regional specificities in the relative frequency of RET mutations, which are consistent with a cluster-like distribution of specific disease-causing mutations, as a result of the inheritance of a shared haplotype. These data, along with the finding of a novel RET mutation (Arg886Trp), have important implications towards facilitating and improving the molecular diagnosis of hereditary MTC on a regional basis.
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Affiliation(s)
- Hugo João Prazeres
- Molecular Pathology Laboratory, Regional Centre of Oncology of Coimbra, Portuguese Institute of Oncology, Coimbra, Portugal.
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82
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Domingues MF, Palmares J, Reis J, Figueiredo P, Rosas V, Castro-Correia J, Falcão-Reis F. Presumed Bilateral Multifocal Tuberculous Choroiditis in an HIV-Negative Patient with Disseminated Tuberculosis. Jpn J Ophthalmol 2005; 49:334-6. [PMID: 16075341 DOI: 10.1007/s10384-005-0207-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2004] [Accepted: 02/03/2005] [Indexed: 11/24/2022]
MESH Headings
- Adult
- Antitubercular Agents/therapeutic use
- Choroiditis/complications
- Choroiditis/diagnostic imaging
- Choroiditis/drug therapy
- Fluorescein Angiography
- HIV Seronegativity
- Heroin Dependence/complications
- Humans
- Isoniazid/therapeutic use
- Magnetic Resonance Imaging
- Male
- Radiography, Thoracic
- Tuberculin Test
- Tuberculosis, Central Nervous System/complications
- Tuberculosis, Central Nervous System/diagnosis
- Tuberculosis, Central Nervous System/drug therapy
- Tuberculosis, Ocular/complications
- Tuberculosis, Ocular/diagnostic imaging
- Tuberculosis, Ocular/drug therapy
- Tuberculosis, Pulmonary/complications
- Tuberculosis, Pulmonary/diagnosis
- Tuberculosis, Pulmonary/drug therapy
- Ultrasonography
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83
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de Freitas D, Urbano M, Goulao MH, Donato MM, Baldaia C, Martins MI, Souto P, Gregorio C, Figueiredo P, Gouveia H, Romaozinho JM. The effect of Helicobacter pylori infection on apoptosis and cell proliferation in gastric epithelium. Hepatogastroenterology 2004; 51:876-82. [PMID: 15143938] [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: 04/29/2023]
Abstract
BACKGROUND/AIMS Helicobacter pylori (Hp) may affect the normal balance between gastric epithelial cell proliferation and epithelial cell death, interfering thus with the maintenance of gastric mucosa integrity. The aim of this study was to investigate the effect of Hp infection on cell proliferation index (PI) and apoptotic index (AI) in gastric epithelium of the antrum and corpus. METHODOLOGY Prospective study in forty-one patients with functional dyspepsia (14 males, 27 females, average age = 54+/-16.1 years). Day one: upper digestive endoscopy with biopsies of the antrum and corpus, and a cytological smear of the antral area for AgNOR (argyrophilic nucleolar organizer region) analysis. Biopsies for the programmed tests were sent in separate labeled containers: to study AI (antibody anti-M30), PI (antibody anti-Ki 67) and histology (Sydney criteria and the detection of Hp). Detection of the AgNORs through the Giménez-Mas et al. technique, using Visilog-Microptic Software. Day two: a blood sample was drawn from each patient for the serologic detection of the status CagA and VacA, and a breath test was carried out with 13C-Urea. STATISTICS SPSS program with the application of Student's t, chi-square and Fisher tests. RESULTS 24 patients were Hp(+) and 17 Hp(-). The PI (Ki 67 and AgNORs) in the antral area was significantly increased in the Hp(+) patients. AI showed no significant difference in the subgroups Hp(+) and Hp(-). Both subgroups showed increased PI in the antrum and increased AI in the gastric corpus. There was significantly higher PI in CagA(+), without an increase in the AI. The AI was significantly higher in CagA(-), when compared with CagA(+). The VacA protein had no influence on PI and AI. Acute and chronic gastritis was more frequent and more severe in Hp(+) patients. This group lacked any correlation between the histological findings and the PI, but the opposite was the case between AI and the degree of cellular infiltration. CONCLUSIONS In patients with functional dyspepsia, Hp infection induces an increase of PI, with significant presence in the antrum area, without the corresponding increase in AI. Cag A(+) promotes the increase of PI, and Cag A(-) promotes the increase of AI. The Vac A status has no influence on the PI or AI. The degree of cellular infiltration interferes with AI.
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Affiliation(s)
- D de Freitas
- Centre for Gastroenterology, Coimbra University Hospital, Coimbra, Portugal.
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84
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Figueiredo P, Lima JC, Santos H, Wigand MC, Brouillard R, Macanita AL, Pina F. Photochromism of the Synthetic 4',7-Dihydroxyflavylium Chloride. J Am Chem Soc 2002. [DOI: 10.1021/ja00083a011] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.2] [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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85
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Pouyet M, Paquet C, Mechet I, Le Derf Y, Bernard P, Figueiredo P, Berger F, Boillot O. [Hemodynamic tolerance and rapid hypertrophy of a hepatic graft corresponding to less than 30% of the ideal mass in pigs]. Gastroenterol Clin Biol 2001; 25:869-74. [PMID: 11852388] [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: 02/23/2023]
Abstract
BACKGROUND AND OBJECTIVE Evaluation of a new pig liver transplantation technique for survival and hypertrophy of a small-sized graft by providing adapted and controlled venous portal flow. MATERIAL AND METHODS [corrected] Twenty Large-White pigs underwent heterotopic liver transplantation after a mesocaval shunt and ligation of the superior mesenteric vein downstream from the shunt. The donor-to-recipient weight ratio was below 30%. Furthermore, recipient's biliary duct and portal vein into the hilum were tied. In a control group, no mesocaval shunt was performed and the graft received the entire splanchnic venous flow. RESULTS The mesocaval shunt provided diversion of 60% of the splanchnic blood flow. The median survival of study pigs was 39 days (range: 8-98). Median serum bilirubin levels at 1 week were 12 micromol/L (range: 4-59). At autopsy, graft weight was increased to 2.7 times the initial weight and histological findings were normal. In the control group, all pigs died quickly from acute splanchnic congestion. CONCLUSION In a model of heterotopic liver transplantation using small-sized grafts, complete diversion of mesenteric blood flow through a mesocaval shunt resulted in hemodynamic tolerance and hypertrophy of a graft corresponding to less than 30% of the ideal mass.
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86
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George F, Figueiredo P, Toki K, Tatsuzawa F, Saito N, Brouillard R. Influence of trans-cis isomerisation of coumaric acid substituents on colour variance and stabilisation in anthocyanins. Phytochemistry 2001; 57:791-795. [PMID: 11397450 DOI: 10.1016/s0031-9422(01)00105-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The recently isolated pigments from Petunia integrifolia and Triteleia bridgesii present a distinct feature that sheds new light on the understanding of intramolecular copigmentation of anthocyanins. These are among the infrequent anthocyanins that naturally present a coumaric acid substituent in both cis and trans forms. As a consequence, the two isomers demonstrate substantial variations of their thermodynamic and kinetic constants and also colour properties. A possible explanation for these characteristics is presented, making use of molecular modelling and taking into account the three-dimensional structures of the pigments.
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Affiliation(s)
- F George
- Laboratoire de Chimie des Polyphénols, UMR 7509 du CNRS, Université Louis Pasteur, Faculté de Chimie, 1, rue Blaise Pascal, 67008 Strasbourg, France
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87
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Freitas J, Castro M, Valerio E, Figueiredo P, Rocha L, Valente A. Renal, hypersensitivity and gastrointestinal toxicity related to gemcitabine/cisplatinum treatment in non-small cell lung cancer. Eur J Cancer 2001. [DOI: 10.1016/s0959-8049(01)82093-1] [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: 11/28/2022]
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88
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de Souza IR, de Souza AP, de Queiroz AP, Figueiredo P, Jesus RS, kara-José N. Influence of Temperature and Humidity on Laser in situ Keratomileusis Outcomes. J Refract Surg 2001; 17:S202-4. [PMID: 11316022 DOI: 10.3928/1081-597x-20010302-11] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
PURPOSE The influence of ambient factors on the results of refractive surgery is not well-known. This study evaluated the influence of temperature and humidity on laser in situ keratomileusis (LASIK) outcomes. METHODS Two hundred thirty-seven patients who underwent LASIK at the Clivan Instituto de Oftalmologia in Salvador--Bahia--Brazil, between May 1999 and March 2000, were evaluated. A total of 156 (65.8%) patients were female. Mean age was 30.3 +/- 7.6 years. Refractive errors: 197 patients (83.12%) had compound myopic astigmatism, 17 patients (7.17%) had myopia, 11 patients (4.64%) had compound hyperopic astigmatism, and 12 patients (5.07%) had other. Results at 15 and 60 days after LASIK were compared according to different levels of temperature and humidity in the operating room during the procedure. RESULTS Patients whose spherical equivalent refraction varied between -0.50 to +0.50 D at 15 days after LASIK had surgery performed when the temperature was 25.1 +/- 1.4 degrees C and humidity was 45.1 +/- 4.2%; for the others, temperature was 24.7 +/- 1.5 degrees C (P = .12) and humidity was 43.0 +/- 4.0% (P = .002). The linear regression coefficient showed that lower temperature levels were associated with lower spherical equivalent refractions at 60 days after LASIK (r2 = .14; P = .03) but not at 15 days after LASIK (P = .98). The evaluation of humidity indicated an influence at 15 days after LASIK (r2 = .44; P = .04), as well as at 60 days (r2 = .45; P = .0002). CONCLUSION Operating room environment may influence LASIK outcomes; humidity may be more significant than temperature.
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Affiliation(s)
- I R de Souza
- CLIVAN, Instituto de Oftalmologia, Salvador-BA, Brasil.
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89
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Figueiredo P, Geppert S, Brandsch R, Bar G, Thomann R, Spontak RJ, Gronski W, Samlenski R, Müller-Buschbaum P. Ordering of Cylindrical Microdomains in Thin Films of Hybrid Isotropic/Liquid Crystalline Triblock Copolymers. Macromolecules 2000. [DOI: 10.1021/ma0011441] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- P. Figueiredo
- Institut für Makromolekulare Chemie, Universität Freiburg, D-79104 Freiburg, Germany
| | - S. Geppert
- Institut für Makromolekulare Chemie, Universität Freiburg, D-79104 Freiburg, Germany
| | - R. Brandsch
- Institut für Makromolekulare Chemie, Universität Freiburg, D-79104 Freiburg, Germany
| | - G. Bar
- Institut für Makromolekulare Chemie, Universität Freiburg, D-79104 Freiburg, Germany
| | - R. Thomann
- Institut für Makromolekulare Chemie, Universität Freiburg, D-79104 Freiburg, Germany
| | - R. J. Spontak
- Institut für Makromolekulare Chemie, Universität Freiburg, D-79104 Freiburg, Germany
| | - W. Gronski
- Institut für Makromolekulare Chemie, Universität Freiburg, D-79104 Freiburg, Germany
| | - R. Samlenski
- Fakultät für Physik, Universität Freiburg, D-79104 Freiburg, Germany
| | - P. Müller-Buschbaum
- Fakultät für Physik, Technische Universität München, D-85747 Garching, Germany
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90
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Serra H, Pista A, Figueiredo P, Urbano A, Avilez F, De Oliveira CF. [Cervix uteri lesions and human papiloma virus infection (HPV): detection and characterization of DNA/HPV using PCR (polymerase chain reaction]. ACTA MEDICA PORT 2000; 13:181-92. [PMID: 11155485] [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: 02/18/2023]
Abstract
The prevalence of human papillomavirus (HPV) genotypes was estimated by the polymerase chain reaction (PCR), in archival paraffin was embedded tissues. The case group consisted of 84 women aged 21-67 years (mean, 40 years) who were referred to the Department of Gynaecology (Oncology Centre, Coimbra) with citopathologically abnormal smears. This group was selected from a population of women who had undergone a screening programme (1990/94) in Central Region of Portugal. All these patients (n = 84) had a colposcopic directed cervical biopsy. HPV detection and typing was performed by the PCR method in the Department of Virology (National Health Care Institute, Lisbon). The prevalence of DNA/HPV found, concerning all epithelial cervical lesions studied and classified as squamous intra-epithelial lesions (SIL) and cervical cancer was 97.8%. On the basis of the data presented in this study, it was estimated that there was a statistically significant prevalence of low risk HPV types (HPV 6/11) in low grade SIL, 83.3%, and a statistically significant prevalence of high risk HPV types (HPV 16,18,31,33,51) in high grade SIL, 58.4%, as well as cervical cancer lesions in 100%. We conclude that there was a statistically significant difference between women with low and high grade SIL for HPV infection, with low and high risk HPV types, respectively. The risk factors for cervical cancer investigated (age at first sexual intercourse, multiple sexual partners, parity, use of oral contraceptives) were not associated to statistically significant differences concerning low grade SIL and high grade SIL. The clinical and therapeutic procedures were evaluated for the same five years (1990/94). It may be concluded that there would be no significant difference in clinical procedure for high grade lesions and cervical cancer, in which the treatment had been frequently radical (cone biopsies, simple or radical hysterectomy) and in which the HPV infection persisted frequently and was associated to high risk types (HPV 16 in 50% of these cases). On the other hand, it may be concluded that HPV detection in cervical biopsies, especially for low grade SIL lesions, which were evaluated in this study with a more conservative procedure (clinical evaluation only, punch biopsies, loop diathermy, CO2 laser vaporisation, cone biopsies), could identify women with high risk HPV types who might be at risk of developing dysplasia and cervical cancer.
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Affiliation(s)
- H Serra
- Serviço de Ginecologia e Serviço de Histopatologia, Centro de Oncologia de Coimbra, Coimbra
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91
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Souto P, Romãozinho JM, Figueiredo P, Ferreira M, Sousa I, Camacho E, Donato A, Freitas D. Severe acute liver failure as the initial manifestation of haematological malignancy. Eur J Gastroenterol Hepatol 1997; 9:1113-5. [PMID: 9431904 DOI: 10.1097/00042737-199711000-00016] [Citation(s) in RCA: 18] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Acute liver failure is rarely secondary to lymphoma or leukaemia and it is extremely uncommon as the initial presentation of malignancy. We report a case of a young adult patient with severe acute liver failure referred for liver transplant, in which a Burkitt acute lymphoblastic leukaemia was diagnosed by bone marrow examination. A complete recovery and long remission were obtained with chemotherapy.
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Affiliation(s)
- P Souto
- Department of Gastroenterology, Coimbra University Hospital, Portugal
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92
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Hajji HE, Dangles O, Figueiredo P, Brouillard R. 3?-(?-D-Glycopyranosyloxy)flavylium Ions: Synthesis and investigation of their properties in aqueous solution. Hydrogen bonding as a mean of colour variation. Helv Chim Acta 1997. [DOI: 10.1002/hlca.19970800206] [Citation(s) in RCA: 10] [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: 11/11/2022]
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93
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Elhabiri M, Figueiredo P, Toki K, Saito N, Brouillard R. Anthocyanin–aluminium and –gallium complexes in aqueous solution. ACTA ACUST UNITED AC 1997. [DOI: 10.1039/a603851d] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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94
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Figueiredo P, Elhabiri M, Saito N, Brouillard R. Anthocyanin Intramolecular Interactions. A New Mathematical Approach To Account for the Remarkable Colorant Properties of the Pigments Extracted from Matthiola incana. J Am Chem Soc 1996. [DOI: 10.1021/ja9535064] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Paulo Figueiredo
- Contribution from the Laboratoire de Chimie des Polyphénols, associé au CNRS, Université Louis Pasteur, Institut de Chimie, 1, rue Blaise Pascal, 67008 Strasbourg, France, and the Chemical Laboratory, Meiji-Gakuin University, Totsuka-ku, Yokohama, Japan
| | - Mourad Elhabiri
- Contribution from the Laboratoire de Chimie des Polyphénols, associé au CNRS, Université Louis Pasteur, Institut de Chimie, 1, rue Blaise Pascal, 67008 Strasbourg, France, and the Chemical Laboratory, Meiji-Gakuin University, Totsuka-ku, Yokohama, Japan
| | - Norio Saito
- Contribution from the Laboratoire de Chimie des Polyphénols, associé au CNRS, Université Louis Pasteur, Institut de Chimie, 1, rue Blaise Pascal, 67008 Strasbourg, France, and the Chemical Laboratory, Meiji-Gakuin University, Totsuka-ku, Yokohama, Japan
| | - Raymond Brouillard
- Contribution from the Laboratoire de Chimie des Polyphénols, associé au CNRS, Université Louis Pasteur, Institut de Chimie, 1, rue Blaise Pascal, 67008 Strasbourg, France, and the Chemical Laboratory, Meiji-Gakuin University, Totsuka-ku, Yokohama, Japan
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95
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Elhabiri M, Figueiredo P, George F, Fougerousse A, Brouillard R, Merlin JC, Cornard JP. Ground- and excited-state properties of some naphthoflavyliums. CAN J CHEM 1996. [DOI: 10.1139/v96-075] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A series of five, structurally related, substituted 2-phenyl-benzopyrylium (flavylium) salts were synthesized and characterized by NMR, absorption, and fluorescence techniques. Their hydration and deprotonation constants were obtained through thermodynamic and relaxation kinetic methods. Metallic complexation with the two compounds possessing a catechol group and its effect on the fluorescence intensity was also studied. The ground state properties of the five pigments are correlated with the theoretical data collected through AM1 molecular orbital calculations. Key words: naphthoflavylium synthesis, hydration and deprotonation constants, fluorescence, metallic complexation, molecular orbital calculations.
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96
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Figueiredo P, Elhabiri M, Toki K, Saito N, Dangles O, Brouillard R. New aspects of anthocyanin complexation. Intramolecular copigmentation as a means for colour loss? Phytochemistry 1996; 41:301-8. [PMID: 8588872 DOI: 10.1016/0031-9422(95)00530-7] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Two series of structurally related anthocyanins, extracted from the blue flowers of Evolvulus pilosus cv. Blue Daze and from the blue-purple flowers of Eichhornia crassipes, exhibit remarkable colour stabilities in aqueous solution at mildly acidic pH values. All the pigments possess the same chromophore (delphinidin), but a different pattern of glycosylation and acylation. Moreover, one of the pigments has an apigenin 7-glucoside molecule (a flavone) attached to the glycosidic chain by two ester bonds with malonic acid, instead of an aromatic acid and is the only known anthocyanin with such a structure. All the molecules studied, except one which has only a 3-gentiobioside (a disaccharide) as substituent, denote an effect of reduction in the hydration constant when compared with the parent delphinidin 3-glucoside or 3,5-diglucoside molecules, which supports the existence of intramolecular hydrophobic interactions between the chromophoric skeleton and the acyl or flavonoid groups. The role played by the sugar units on the hydrophobicity/hydrophilicity of the pigments is also discussed.
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Affiliation(s)
- P Figueiredo
- Laboratoire de Chimie des Polyphénols, Associé au CNRS, Université Louis Pasteur, Institut de Chimie, Strasbourg, France
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97
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Lafuente E, Marinho A, Bártolo A, Esteves F, Martins I, Silva A, Lemos L, Figueiredo P, Pina J, Cardoso AP. Influence of venovenous hemofiltration on pulmonar function. Intensive Care Med 1996. [DOI: 10.1007/bf01921211] [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]
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98
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Abstract
Immunohistochemical analysis of the expression of simple mucin-type carbohydrate antigens (Tn, sialyl-Tn and T) was performed in a series of 43 cases of intraductal hyperplasia without atypia, 9 cases of intraductal hyperplasia with atypia, 54 cases of ductal carcinoma in situ (DCIS) and 26 cases of invasive breast carcinoma. We also studied 36 cases of isolated breast normal epithelium, 20 cases of "normal" breast epithelium adjacent to neoplasms and 14 cases of apocrine metaplasia. All antigens were detected in different frequencies in normal, hyperplastic, metaplastic and neoplastic breast epithelium. Tn and sialyl-Tn are expressed more frequently in malignant than in benign breast epithelium; while Tn expression increases from normal to invasive carcinomas, sialyl-Tn increases until DCIS and drops in invasive carcinomas, suggesting that either there is a failure of a proportion of DCIS to progress to invasive carcinoma or loss of expression of sialyl-Tn when some carcinomas become invasive. The high frequency of Tn and sialyl-Tn expression in breast intraductal proliferations probably reflects incomplete glycosylation in these lesions, which is a well-known tumour-associated phenomenon and supports the assumption that such lesions are putative precursors of breast cancer. T antigen was expressed in all groups studied, but its prevalence differed significantly between normal and neoplastic epithelium. The expression of these antigens in epithelium adjacent to carcinomas is similar to that found in isolated normal breast epithelium, whereas apocrine metaplasia has a pattern of simple mucin-type glycosylation that is specific and distinct from that of the normal breast epithelium, with a high frequency of marked expression of Tn and sialyl-Tn. The similarity of the pattern of expression of simple mucin-type antigens in metaplasia and malignant neoplasia reduces the usefulness of these markers from a diagnostic standpoint.
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Affiliation(s)
- F C Schmitt
- Department of Pathology, Botucatu School of Medicine, UNESP, São Paulo, Brazil
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99
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Schmitt FC, Figueiredo P, Lacerda M. Expression of c-erb B-2 protein and DNA ploidy in breast carcinogenesis. Arch Pathol Lab Med 1995; 119:815-20. [PMID: 7668939] [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: 01/26/2023]
Abstract
OBJECTIVE to examine the c-erb B-2 expression and nuclear DNA content in samples of breast lesions to ascertain any relationship between c-erb B-2 expression and aneuploidy in the different types of proliferative breast lesions and in intraductal and invasive carcinomas. DESIGN AND SETTING Immunohistochemical analysis of c-erb B-2 expression and cytometric nuclear DNA assessment were performed in a series of 39 cases of intraductal hyperplasia without atypia, 7 cases of intraductal hyperplasia with atypia, 64 cases of intraductal carcinoma, and 85 cases of invasive breast carcinoma (30 of which had extensive intraductal component). RESULTS Overexpression of c-erb B-2 was seen only in cases of carcinoma: 28 (43.7%) intraductal carcinomas and 15 (17.6%) invasive carcinomas. Aneuploidy was demonstrated in 3 (43.0%) cases of intraductal hyperplasia with atypia, in 54 (84.4%) cases of intraductal carcinoma, and in 63 (74.2%) cases of invasive carcinoma. All cases of intraductal hyperplasia without atypia were euploid and none expressed c-erb B-2. Among the carcinomas (intraductal and invasive) there was a strong relationship between aneuploidy and c-erb B-2 expression. In most instances, the intraductal and invasive components of the 30 invasive carcinomas with extensive intraductal component displayed similar DNA content and c-erb B-2 immunoreactivity; whenever there was a difference, the intraductal component tended to be aneuploid (five out of six cases) and c-erb B-2 positive (one case), in contrast to the respective invasive component. CONCLUSIONS The higher frequency of aneuploidy and c-erb B-2 expression in intraductal carcinomas in comparison with invasive carcinomas suggests there is not a linear relationship between DNA content abnormalities and neoplastic progression and that some invasive breast carcinomas evolve without an identifiable intraductal phase or are unrelated to disturbances at the c-erb B-2 locus.
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Affiliation(s)
- F C Schmitt
- Department of Pathology, Botucatu School of Medicine, Universidade Estadual Paulista, São Paulo, Brazil
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100
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Figueiredo P, Cotrim I, Gouveia H, Freitas D. An unusual solution in a case of dislodgement of a cuffed esophageal prosthesis. Endoscopy 1995; 27:346. [PMID: 7555947 DOI: 10.1055/s-2007-1005709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- P Figueiredo
- Department of Gastroenterology, University Hospital of Coimbra, Portugal
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