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Costa M, Valente A, Freitas M, Almeida C, Teixeira C, Gonçalves M, Tavares N, Almeida D, Caeiro C, Augusto I, Sousa I, Barbosa M. Clinical benefit and tolerability of CDK4/6 inhibitors in the treatment of breast cancer advanced in the geriatric population – real life data from a Hospital Center. Eur J Cancer 2022. [DOI: 10.1016/s0959-8049(22)01519-2] [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: 11/19/2022]
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Costa M, Valente A, Freitas M, Almeida C, Tavares N, Almeida D, Caeiro C, Augusto I, Sousa I, Barbosa M. Advanced breast cancer treatment after CDK4/6– inhibitors - the experience of a Hospital Center. Eur J Cancer 2022. [DOI: 10.1016/s0959-8049(22)01538-6] [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: 11/19/2022]
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Lucas M, Freitas M, Zanchetta M, Silva V, Silva A, Fernandes E, Ribeiro D. P12-41 Cytotoxicity and anti-inflammatory potential of 2-styrylchromones. Toxicol Lett 2022. [DOI: 10.1016/j.toxlet.2022.07.520] [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: 10/14/2022]
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Sousa A, Azevedo R, Oliveira S, Preguiça I, Viana S, Reis F, Almeida A, Matafome P, Carvalho F, Fernandes E, Freitas M. P10-11 Biodistribution and cytokine production following oral administration of silver nanoparticles to C57BL/6J mice. Toxicol Lett 2022. [DOI: 10.1016/j.toxlet.2022.07.442] [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]
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Costa M, Valente A, Costa I, Freitas M, Almeida C, Goncalves M, Fernandes C, Reis J, Teixeira C, Tavares N, Sarmento C, Barbosa M. P-204 Outcomes of geriatric population with resectable colorectal liver metastases cancer: Data from real life. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.04.294] [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: 11/17/2022] Open
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Freitas M, de Castro FD, Macedo Silva V, Arieira C, Cúrdia Gonçalves T, Leite S, Moreira MJ, Cotter J. Ultrasonographic scores for ileal Crohn's disease assessment: Better, worse or the same as contrast-enhanced ultrasound? BMC Gastroenterol 2022; 22:252. [PMID: 35585503 PMCID: PMC9118849 DOI: 10.1186/s12876-022-02326-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Accepted: 04/27/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Intestinal ultrasound (IUS) is an increasingly used non-invasive tool to evaluate Crohn's disease (CD) activity. Recently, two IUS scores that evaluate inflammatory activity have emerged: the Simple Ultrasound Activity Score for CD (SUS-CD) and the International Bowel Ultrasound Segmental Activity Score (IBUS-SAS). We aimed to compare the accuracy of SUS-CD, IBUS-SAS and contrast-enhanced ultrasound (CEUS) in predicting inflammatory activity in the terminal ileum in ileocolonoscopy in CD patients. METHODS Retrospective study including all consecutive CD patients submitted to IUS with CEUS directed to the terminal ileum performed by a single operator between April 2016 and March 2020. Segmental SUS-CD and IBUS-SAS were calculated. A time-intensity curve of the contrast bowel wall enhancement was created with measurement of peak intensity using CEUS. The CD endoscopic activity in ileocolonoscopy was graded by Simple Endoscopic Score for CD (SES-CD) as inactive (SES-CD < 7) or active (SES-CD ≥ 7). RESULTS Fifty patients were included, 54.0% were female, with mean age of 34 ± 12 years, and most had isolated ileal disease (60.0%), and a nonstricturing, nonpenetrating behaviour (44.0%). Most of the patients (60.0%) had active endoscopic disease (SES-CD ≥ 7). SUS-CD and IBUS-SAS were not different between patients with active or inactive endoscopic disease (p = 0.15; 0.57, respectively), having a poor accuracy to correlate endoscopic activity (area under de curve (AUC) 0.62; 0.55, respectively). Peak intensity in CEUS was significantly different in patients with active or inactive endoscopic disease (p = 0.004), having a good accuracy to correlate endoscopic activity (AUC 0.80). CONCLUSION Unlike CEUS, SUS-CD and IBUS-SAS were not able to accurately correlate endoscopic activity in terminal ileum in CD. Therefore, CEUS is a non-invasive emerging method that should be increasingly integrated in the ultrasonographic evaluation of CD patients.
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Affiliation(s)
- M Freitas
- Gastroenterology Department, Hospital da Senhora da Oliveira, Guimarães, Portugal. .,Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal. .,ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal.
| | - F Dias de Castro
- Gastroenterology Department, Hospital da Senhora da Oliveira, Guimarães, Portugal.,Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - V Macedo Silva
- Gastroenterology Department, Hospital da Senhora da Oliveira, Guimarães, Portugal.,Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - C Arieira
- Gastroenterology Department, Hospital da Senhora da Oliveira, Guimarães, Portugal.,Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - T Cúrdia Gonçalves
- Gastroenterology Department, Hospital da Senhora da Oliveira, Guimarães, Portugal.,Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - S Leite
- Gastroenterology Department, Hospital da Senhora da Oliveira, Guimarães, Portugal.,Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - M J Moreira
- Gastroenterology Department, Hospital da Senhora da Oliveira, Guimarães, Portugal.,Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - J Cotter
- Gastroenterology Department, Hospital da Senhora da Oliveira, Guimarães, Portugal.,Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal
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BEIRÃO B, Freitas M, Francisco J, Sousa C, Pereira P, Prata C, Castro R, Morgado T. POS-928 EFFICACY OF THE PFIZER/ BNT162b2 COVID-19 VACCINE IN PERITONEAL DIALYSIS PATIENTS. Kidney Int Rep 2022. [PMCID: PMC8854947 DOI: 10.1016/j.ekir.2022.01.968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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FRANCISCO J, Beirão B, Freitas M, Sousa C, Pereira P, Castro R, Morgado T. POS-939 EFFICACY OF BNT162b2 VACCINE IN PATIENTS UNDERGOING HEMODIALYSIS IN NORTH OF PORTUGAL. Kidney Int Rep 2022. [PMCID: PMC8854880 DOI: 10.1016/j.ekir.2022.01.979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Soares T, Freitas M, Carvalho F, Fernandes E. Low size citrate coated silver nanoparticles are potent inducers of human neutrophils’ oxidative burst. Toxicol Lett 2018. [DOI: 10.1016/j.toxlet.2018.06.1059] [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 T, Gónzalez-Gómez M, Rivas J, Freitas P, Carvalho F, Fernandes E, Freitas M. Polyethylemine coated silver nanoparticles induce human neutrophils’ oxidative burst via NADPH oxidase, through the activation of PKC. Toxicol Lett 2018. [DOI: 10.1016/j.toxlet.2018.06.1360] [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]
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de Matos F, Ascenso D, Freitas M, Almeida S, Duarte C. Botulinum toxin type A in the treatment of sialorrhea - Our experience. Ann Phys Rehabil Med 2018. [DOI: 10.1016/j.rehab.2018.05.726] [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: 12/01/2022]
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Freitas M, Alqaraawi A, Lang A, Liu LW. A175 LINACLOTIDE AND PRUCALOPRIDE FOR MANAGEMENT OF CONSTIPATION IN PATIENTS WITH PARKINSONISM. J Can Assoc Gastroenterol 2018. [DOI: 10.1093/jcag/gwy009.175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- M Freitas
- Division of Gastroenterology, Department of Medicine, Toronto Western Hospital, University of Toronto, Toronto, ON, Canada
| | - A Alqaraawi
- King Faisal Specialist Hospital & Research Centre, Riyadh, Saudi Arabia
| | - A Lang
- Division of Gastroenterology, Department of Medicine, Toronto Western Hospital, University of Toronto, Toronto, ON, Canada
| | - L W Liu
- Medicine, University Health Network, Toronto, ON, Canada
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Palmeiro A, Morais J, Lourenço M, Freitas M, Providência L, Ferrer-Antunes C. The Mutation C677T in the Methylene Tetrahydrofolate Reductase Gene as a Risk Factor for Myocardial Infarction in the Portuguese Population. Thromb Haemost 2017. [DOI: 10.1055/s-0037-1615241] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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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Santos JEC, Freitas M, Fonseca CP, Castilho P, Carreira IM, Rombeau JL, Branco MC. Iodine deficiency a persisting problem: assessment of iodine nutrition and evaluation of thyroid nodular pathology in Portugal. J Endocrinol Invest 2017; 40:185-191. [PMID: 27619914 DOI: 10.1007/s40618-016-0545-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Accepted: 09/01/2016] [Indexed: 10/21/2022]
Abstract
BACKGROUND The goal of eliminating iodine deficiency (ID) by the year 2000 has still not been achieved in several countries. More than 2 billion people worldwide (over 260 million school age children) remain ID. In Europe, there are still countries, such as Portugal, without national general population data on iodine nutrition (IN). This study aims at evaluating combined complementary data of the IN of the general population through urinary iodine concentration (UIC) and the thyroid histology profile from the inland region of Beira Interior (BI), in Portugal. METHODS UIC from a population sample of 214 volunteers (131 females and 83 males), with ages ranging from 8 to 97 years (mean 51.5 years ± SD 20.74 years), from BI was determined; the thyroid histology pattern in BI (6-year period) was evaluated; and the iodine content of the largest surface water reservoir of BI, never previously reported, was measured. RESULTS Median UIC of 62.6 μg/L was measured. Over 92 % of the population had UIC less than 100 μg/L. From 279 histology reports evaluated, the incidence of the different types of thyroid nodular pathology in BI was established. There were 60 histologic diagnoses of malignancy. The observed ratio of papillary to follicular carcinoma relatively close to 1 and the fairly high percentage of anaplastic carcinomas are characteristic of ID areas. CONCLUSIONS The findings of this first general population study on IN from the inland region of BI, Portugal, document significant ID. This problem, with its serious public health implications, could be corrected by having affordable iodised salt widely and generally available and by promoting a proactive population attitude generated by ample public information and educational programs as to the negative consequences of ID.
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Affiliation(s)
- J E C Santos
- Faculty of Health Sciences, University of Beira Interior, Covilhã, Portugal.
- CICS-UBI Health Sciences Research Centre, Faculty of Health Sciences, University of Beira Interior, Covilhã, Portugal.
- Centro Hospitalar Cova da Beira, Covilhã, Portugal.
| | - M Freitas
- Department of Biostatistics, Faculty of Health Sciences, University of Beira Interior, Covilhã, Portugal
| | - C P Fonseca
- Faculty of Health Sciences, University of Beira Interior, Covilhã, Portugal
- CICS-UBI Health Sciences Research Centre, Faculty of Health Sciences, University of Beira Interior, Covilhã, Portugal
| | - P Castilho
- Faculty of Health Sciences, University of Beira Interior, Covilhã, Portugal
- CICS-UBI Health Sciences Research Centre, Faculty of Health Sciences, University of Beira Interior, Covilhã, Portugal
| | - I M Carreira
- CIMAGO - Centre of Investigation in Environment, Genetics and Oncobiology, Coimbra, Portugal
- Laboratory of Cytogenetics and Genomics, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - J L Rombeau
- Emeritus Professor of Surgery, Perleman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - M C Branco
- Faculty of Health Sciences, University of Beira Interior, Covilhã, Portugal
- CICS-UBI Health Sciences Research Centre, Faculty of Health Sciences, University of Beira Interior, Covilhã, Portugal
- Centro Hospitalar Cova da Beira, Covilhã, Portugal
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Machado J, Campos A, Vasconcelos V, Freitas M. Effects of microcystin-LR and cylindrospermopsin on plant-soil systems: A review of their relevance for agricultural plant quality and public health. Environ Res 2017; 153:191-204. [PMID: 27702441 DOI: 10.1016/j.envres.2016.09.015] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2016] [Revised: 09/18/2016] [Accepted: 09/19/2016] [Indexed: 06/06/2023]
Abstract
Toxic cyanobacterial blooms are recognized as an emerging environmental threat worldwide. Although microcystin-LR is the most frequently documented cyanotoxin, studies on cylindrospermopsin have been increasing due to the invasive nature of cylindrospermopsin-producing cyanobacteria. The number of studies regarding the effects of cyanotoxins on agricultural plants has increased in recent years, and it has been suggested that the presence of microcystin-LR and cylindrospermopsin in irrigation water may cause toxic effects in edible plants. The uptake of these cyanotoxins by agricultural plants has been shown to induce morphological and physiological changes that lead to a potential loss of productivity. There is also evidence that edible terrestrial plants can bioaccumulate cyanotoxins in their tissues in a concentration dependent-manner. Moreover, the number of consecutive cycles of watering and planting in addition to the potential persistence of microcystin-LR and cylindrospermopsin in the environment are likely to result in groundwater contamination. The use of cyanotoxin-contaminated water for agricultural purposes may therefore represent a threat to both food security and food safety. However, the deleterious effects of cyanotoxins on agricultural plants and public health seem to be dependent on the concentrations studied, which in most cases are non-environmentally relevant. Interestingly, at ecologically relevant concentrations, the productivity and nutritional quality of some agricultural plants seem not to be impaired and may even be enhanced. However, studies assessing if the potential tolerance of agricultural plants to these concentrations can result in cyanotoxin and allergen accumulation in the edible tissues are lacking. This review combines the most current information available regarding this topic with a realistic assessment of the impact of cyanobacterial toxins on agricultural plants, groundwater quality and public health.
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Affiliation(s)
- J Machado
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, P 4050-123 Porto, Portugal
| | - A Campos
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, P 4050-123 Porto, Portugal
| | - V Vasconcelos
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, P 4050-123 Porto, Portugal; Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre, P 4069-007 Porto, Portugal
| | - M Freitas
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, P 4050-123 Porto, Portugal; Polytechnic Institute of Porto, Department of Environmental Health, School of Allied Health Technologies, CISA/Research Center in Environment and Health, Rua de Valente Perfeito, 322, P 440-330 Gaia, Portugal.
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Machado J, Azevedo J, Freitas M, Pinto E, Almeida A, Vasconcelos V, Campos A. Analysis of the use of microcystin-contaminated water in the growth and nutritional quality of the root-vegetable, Daucus carota. Environ Sci Pollut Res Int 2017; 24:752-764. [PMID: 27752954 DOI: 10.1007/s11356-016-7822-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2016] [Accepted: 10/03/2016] [Indexed: 06/06/2023]
Abstract
Toxic cyanobacterial blooms are often observed in freshwaters and may reflect the increased eutrophication of these environments and alterations in climate. Cyanotoxins, such as microcystins (MCs), are an effective threat to many life forms, ranging from plants to humans. Despite the research conducted to date on cyanotoxins, the risks associated to the use of contaminated water in agriculture require further elucidation. To tackle this aim, a research was conducted with the root-vegetable Daucus carota. The specific aims of this work were the following: (i) to evaluate the effects of MC-LR on the plant growth and photosynthesis; (ii) to evaluate the nutritional quality of carrot roots; and (iii) to measure bioaccumulation. To this purpose, young carrots were grown in soil during 1 month in natural conditions and exposed to Mycrocystis aeruginosa aqueous extracts containing environmentally realistic concentrations of MC-LR (10 and 50 MC-LR μg/L). The results showed that MC-LR may decrease root growth after 28 days of exposure to 50 μg/L and increase photosynthetic efficiency. We also observed changes in mineral and vitamin content in carrots as a result of the exposure to contaminated water. Moreover, MC-LR was detected in carrot roots by ELISA at very low concentration 5.23 ± 0.47 ng MC eq./g FW. The soil retained 52.7 % of the toxin potentially available for plants. This result could be attributed to MC-LR adsorption by soil particles or due to microbial degradation of the toxin. We conclude that the prolonged use of MC-LR-contaminated water may affect crop growth, alter the nutritional value of vegetable products, and potentiate contamination.
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Affiliation(s)
- J Machado
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, P 4050-123, Porto, Portugal
| | - J Azevedo
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, P 4050-123, Porto, Portugal
| | - M Freitas
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, P 4050-123, Porto, Portugal
- Department of Environmental Health of School of Allied Health Technologies, and CISA/Research Center in Environment and Health, Polytechnic Institute of Porto, Rua de Valente Perfeito, 322, P 440-330, Gaia, Portugal
| | - E Pinto
- REQUIMTE, Department of Chemical Sciences, Laboratory of Applied Chemistry, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira 228, P 4050-313, Porto, Portugal
- Department of Environmental Health of School of Allied Health Technologies, and CISA/Research Center in Environment and Health, Polytechnic Institute of Porto, Rua de Valente Perfeito, 322, P 440-330, Gaia, Portugal
| | - A Almeida
- REQUIMTE, Department of Chemical Sciences, Laboratory of Applied Chemistry, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira 228, P 4050-313, Porto, Portugal
| | - V Vasconcelos
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, P 4050-123, Porto, Portugal
- Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre, P 4069-007, Porto, Portugal
| | - A Campos
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, P 4050-123, Porto, Portugal.
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Teodoro R, Gomes L, Barbosa L, Freitas M, Silva C, Faria M. TROMBOSE VENOSA CENTRAL COM COMPONENTES HEMORRÁGICOS E ISQUÊMICOS EM PACIENTE LÚPICO DEVIDO A SAF SECUNDÁRIA. Revista Brasileira de Reumatologia 2017. [DOI: 10.1016/j.rbr.2017.07.528] [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: 10/19/2022] Open
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Teodoro R, Gomes L, Barbosa L, Freitas M, Almeida L, Furtado P. CRISE RENAL ESCLRERODÉRMICA RECIDIVANTE NECESSITANDO DE ALTAS DOSES DE IECA. Revista Brasileira de Reumatologia 2017. [DOI: 10.1016/j.rbr.2017.07.035] [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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Laurindo I, Mota L, Romeiro L, Ranza R, Freitas M, Pereira I, Vasconcelos J, Brenol C, Rezende L, Bertolo M, Torigoe D. SAT0585 Barriers To T2T Implementation: RA Patient's Perspectives about Comorbidities and Structural Damage in Therapeutic Decisions. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.4972] [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: 11/04/2022]
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Ribeiro D, Kupski L, Furlong EB, Freitas M, Fernandes E. Pro-inflammatory and toxic effects of ochratoxin and ochratoxin α in human neutrophils. Toxicol Lett 2015. [DOI: 10.1016/j.toxlet.2015.08.294] [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: 10/23/2022]
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Chisté R, Couto D, Freitas M, Costa V, Almeida A, Lopez-Quintela M, Rivas J, Freitas P, Carvalho F, Fernandes E. The putative pro-inflammatory effect and oxidative stress induced by polyacrylic acid-coated iron oxide nanoparticles in mice: An biodistribution and toxicological study. Toxicol Lett 2015. [DOI: 10.1016/j.toxlet.2015.08.787] [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: 10/23/2022]
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Figueira ME, Câmara MB, Direito R, Rocha J, Serra AT, Duarte CMM, Fernandes A, Freitas M, Fernandes E, Marques MC, Bronze MR, Sepodes B. Chemical characterization of a red raspberry fruit extract and evaluation of its pharmacological effects in experimental models of acute inflammation and collagen-induced arthritis. Food Funct 2015; 5:3241-51. [PMID: 25322288 DOI: 10.1039/c4fo00376d] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Berries are an important dietary source of fibres, vitamins, minerals and some biologically active non-nutrients. A red raspberry fruit extract was characterized in terms of phenolic content and the anti-inflammatory properties and protective effects were evaluated in two experimental models of inflammation. The antioxidant potential of the extract, the cellular antioxidant activity and the effects over neutrophils' oxidative burst were also studied to provide a mechanistic insight for the anti-inflammatory effects observed. The extract was administered in a dose of 15 mg kg(-1), i.p. and significantly inhibited paw oedema formation in the rat. The same dose was administered via i.p. and p.o. routes in the collagen-induced arthritis model in the rat. The extract showed pharmacological activity and was able to significantly reduce the development of clinical signs of arthritis and markedly reduce the degree of bone resorption, soft tissue swelling and osteophyte formation, preventing articular destruction in treated animals.
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Affiliation(s)
- M E Figueira
- iMED.ULisboa, Faculdade de Farmácia da Universidade de Lisboa, Avenida Prof. Gama Pinto, 1649-003 Lisboa, Portugal.
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Laurindo I, Torigoe D, Bertolo M, Rezende L, Brenol C, Vasconcelos J, Pereira I, Freitas M, Ranza R, Romairo L, Mota L. THU0184 Patients Centered Barriers to Treat to Target (T2T) Implementation. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.5874] [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: 11/04/2022]
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Silva S, Sepodes B, Rocha J, Direito R, Fernandes A, Brites D, Freitas M, Fernandes E, Bronze MR, Figueira ME. Protective effects of hydroxytyrosol-supplemented refined olive oil in animal models of acute inflammation and rheumatoid arthritis. J Nutr Biochem 2014; 26:360-8. [PMID: 25620693 DOI: 10.1016/j.jnutbio.2014.11.011] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Revised: 10/25/2014] [Accepted: 11/18/2014] [Indexed: 11/19/2022]
Abstract
Virgin olive oil is the primary source of fat in the Mediterranean diet, and its beneficial health effects have been related with oleic acid and phenolic compounds content. Hydroxytyrosol, a typical virgin olive oil phenolic compound, has beneficial antioxidant and anti-inflammatory properties as previously reported. The aim of this study was to evaluate the effect of hydroxytyrosol-supplemented refined olive oil at 0.5 and 5 mg/kg in a rodent model of rheumatoid arthritis. Rheumatoid arthritis was induced by intradermic administration, in male Wistar rats, of Freund's adjuvant with collagen type II on days 1 and 21. Hydroxytyrosol-supplemented refined olive oils were administrated by gavage from day 23 until day 35. The treatment at 5-mg/kg dose significantly decreased paw edema (P<.01), histological damage, cyclooxygenase-2 and inducible nitric oxide synthase expression, and markedly reduced the degree of bone resorption, soft tissue swelling and osteophyte formation, improving articular function in treated animals. Acute inflammation, induced by carrageenan, was also evaluated for hydroxytyrosol-supplemented refined olive oils at 0.5 and 5 mg/kg. Both doses significantly reduced paw edema (P<.001). Our results suggest that the supplementation of refined olive oil with hydroxytyrosol may be advantageous in rheumatoid arthritis with significant impact not only on chronic inflammation but also on acute inflammatory processes.
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Affiliation(s)
- S Silva
- Ibet, Avenida da República, Quinta-do-Marquês, Estação Agronómica Nacional, 2780-157 Oeiras, Portugal; Itqb, Estação Agronómica Nacional, Av. da República, 2780-157 Oeiras, Portugal; Faculdade de Farmácia da Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - B Sepodes
- Faculdade de Farmácia da Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal; iMED.ULisboa, Research Institute for Medicines, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - J Rocha
- Faculdade de Farmácia da Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal; iMED.ULisboa, Research Institute for Medicines, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - R Direito
- Faculdade de Farmácia da Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal; iMED.ULisboa, Research Institute for Medicines, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - A Fernandes
- Faculdade de Farmácia da Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal; iMED.ULisboa, Research Institute for Medicines, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - D Brites
- Faculdade de Farmácia da Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal; iMED.ULisboa, Research Institute for Medicines, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - M Freitas
- Requimte, Laboratório de Química Aplicada, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, 4050-313 Porto, Portugal
| | - E Fernandes
- Requimte, Laboratório de Química Aplicada, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, 4050-313 Porto, Portugal
| | - M R Bronze
- Ibet, Avenida da República, Quinta-do-Marquês, Estação Agronómica Nacional, 2780-157 Oeiras, Portugal; Itqb, Estação Agronómica Nacional, Av. da República, 2780-157 Oeiras, Portugal; Faculdade de Farmácia da Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - M E Figueira
- Faculdade de Farmácia da Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal; iMED.ULisboa, Research Institute for Medicines, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal.
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Lefebvre E, Lequeux I, Vighetto C, Fromantin I, Thebault P, Seyer D, Picard J, Teot L, Meaume S, Freitas M, Neffati S, Guermah LE, Pelissier S, Giraudier S, Jouenne T, Garde V. From a clinical observation of chronic wound microbiology to the elaboration of an anti-biofilm dressing: The PANSaBIO project strategy. Ing Rech Biomed 2014. [DOI: 10.1016/j.irbm.2014.02.003] [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: 10/25/2022]
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27
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Freitas M, Viswanathan S, Nouws H, Oliveira M, Delerue-Matos C. Iron oxide/gold core/shell nanomagnetic probes and CdS biolabels for amplified electrochemical immunosensing of Salmonella typhimurium. Biosens Bioelectron 2014; 51:195-200. [DOI: 10.1016/j.bios.2013.07.048] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Revised: 07/19/2013] [Accepted: 07/25/2013] [Indexed: 11/25/2022]
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28
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Satoskar AA, Shapiro JP, Bott C, Song H, Nadasdy GM, Brodsky SV, Hebert L, Birmingham DJ, Nadasdy T, Freitas M, Rovin BH. Characterization of glomerular diseases using proteomic analysis of laser capture microdissected glomeruli. Mod Pathol 2012; 25:709-21. [PMID: 22282304 PMCID: PMC3432020 DOI: 10.1038/modpathol.2011.205] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The application of molecular techniques to characterize clinical kidney biopsies has the potential to provide insights into glomerular diseases that cannot be revealed by traditional renal pathology. The present work is a proof-of-concept approach to test whether proteomic analysis of glomeruli isolated from clinical biopsies by laser capture microdissection can provide unique information regarding differentially expressed proteins relevant to disease pathogenesis. The proteomes of glomeruli isolated by laser capture microdissection from biopsies of normal kidneys (living-related donor kidneys) were compared with those from patients with diabetic nephropathy, lupus nephritis, and fibronectin glomerulopathy. Glomerular proteins were extracted, trypsin digested, and subjected to liquid chromatography-tandem mass spectrometry for identification and quantitation. Relative to normal glomeruli, all disease-associated glomeruli showed an increased presence of complement components, a marked decline in podocyte-associated proteins, and a decrease in proteins associated with cellular metabolism. Additionally, fibronectin glomerulopathy glomeruli differed from all the other glomeruli because of a significant accumulation of fibronectin and fibulin. This study demonstrates that our method acquires reproducible and quantitative proteomic information from laser capture microdissection isolates that can be used to characterize the molecular features of glomerular diseases.
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Affiliation(s)
- AA Satoskar
- Dept of Pathology, The Ohio State University Medical Center, Columbus, OH
| | - JP Shapiro
- Dept of Molecular Virology, Immunology and Medical Genetics, The Ohio State University Medical Center, Columbus, OH
| | - C Bott
- Dept of Pathology, The Ohio State University Medical Center, Columbus, OH
| | - H Song
- Dept of Internal Medicine – Division of Nephrology. The Ohio State University Medical Center, Columbus, OH
| | - GM Nadasdy
- Dept of Pathology, The Ohio State University Medical Center, Columbus, OH
| | - SV Brodsky
- Dept of Pathology, The Ohio State University Medical Center, Columbus, OH
| | - L Hebert
- Dept of Internal Medicine – Division of Nephrology. The Ohio State University Medical Center, Columbus, OH
| | - DJ Birmingham
- Dept of Internal Medicine – Division of Nephrology. The Ohio State University Medical Center, Columbus, OH
| | - T Nadasdy
- Dept of Pathology, The Ohio State University Medical Center, Columbus, OH
| | - M Freitas
- Dept of Molecular Virology, Immunology and Medical Genetics, The Ohio State University Medical Center, Columbus, OH
| | - BH Rovin
- Dept of Internal Medicine – Division of Nephrology. The Ohio State University Medical Center, Columbus, OH
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29
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Motter A, Souza K, Santos M, Freitas M, Veiga T, Micos A, Mendonça R. Promoção dos Laços Família – Bebê por Meio da Shantala. Rev UNIANDRADE 2012. [DOI: 10.18024/1519-5694/revuniandrade.v13n1p30-41] [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: 11/03/2022] Open
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30
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Costa P, Terini R, Freitas M, Watanabe E. SU-GG-E-03: Current Status of Medical Physics Undergraduation Courses in Brazil. Med Phys 2010. [DOI: 10.1118/1.3468033] [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: 11/07/2022] Open
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31
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Japiassú AM, Almeida GF, Vegni R, Freitas M, Drumond LE, Penna G, Salgado A, Araújo P, Nobre GF, Kalichsztein M. Cardiac surgery for ascending aortic dissection has a good short-term and medium-term prognosis in a paired-matched analysis. Crit Care 2009. [PMCID: PMC4085434 DOI: 10.1186/cc7836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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32
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António N, Lourenço C, Monteiro S, Costa S, Monteiro P, Gonçalves F, Gonçalves L, Freitas M, Providência L. APOPROTEIN B: A MARKER OF ATHEROGENIC DYSLIPIDEMIA. ATHEROSCLEROSIS SUPP 2008. [DOI: 10.1016/s1567-5688(08)70355-6] [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]
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33
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Kalichsztein M, Wajsbrot B, dos Santos A, Jorge JC, Fabricio B, Pedro K, Nobre G, Moreira E, Freitas M, Paula A. Comparing a Brazilian guideline to treat nosocomial pneumonia with the ATS guideline in a tertiary hospital in Brazil. Crit Care 2007. [PMCID: PMC4095142 DOI: 10.1186/cc5248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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34
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Kurtz P, Kalichsztein M, Nobre G, Almeida G, Kezen J, Braga F, Rosa P, Penna G, Drumond L, Vegni R, Freitas M, Pinto M. ANCCADI – Antibiotic Coated Catheter to Decrease Infection: a pilot trial. Crit Care 2007. [PMCID: PMC4095135 DOI: 10.1186/cc5241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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35
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Abstract
In children under 5 years of age, presenting to the paediatric emergency room with clinical and radiological findings of pneumonia, viridans streptococci were isolated in 10/33 positive haemocultures as the only microorganism. Viridans streptococci should therefore not be ruled out as a cause of pneumonia.
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Affiliation(s)
- M Freitas
- Federal University of Para, UFPA, Sao Paulo, Brazil.
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36
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Fernandes T, Sartor C, Andrusaitis F, Ortiz R, Freitas M, Masagão R, de Camargo Neves Sacco I. Assessment of balance of a patient submitted to triple arthrodesis of foot—pilot project. J Biomech 2006. [DOI: 10.1016/s0021-9290(06)85095-5] [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: 11/29/2022]
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37
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Nobre G, Kalichsztein M, Kezen J, Braga F, Almeida G, Penna G, Kurtz P, Araujo P, Vegni R, Freitas M, Valdez C. Crit Care 2006; 10:P408. [DOI: 10.1186/cc4755] [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: 11/10/2022] Open
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38
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Kurtz P, Freitas M, Vegni R, Drumond L, Almeida G, Penna G, Braga F, Valdez C, Araujo P, Kezen J, Kalichsztein M, Nobre G. Crit Care 2006; 10:P258. [DOI: 10.1186/cc4605] [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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39
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Araujo P, Kurtz P, Penna G, Valdez C, Almeida G, Freitas M, Vegni R, Braga F, Kezen J, Nobre G, Kalichsztein M. Crit Care 2006; 10:P78. [DOI: 10.1186/cc4425] [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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40
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Vegni R, Lins RH, Braga F, Almeida G, Drumond L, Kalichsztein M, Nobre G, Freitas M, Valdez C, Araujo P, Kurtz P, Kezen J. Crit Care 2006; 10:P45. [DOI: 10.1186/cc4392] [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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41
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Rodrigues JM, Luís AL, Lobato JV, Pinto MV, Faustino A, Hussain NS, Lopes MA, Veloso AP, Freitas M, Geuna S, Santos JD, Maurício AC. Intracellular Ca2+ concentration in the N1E-115 neuronal cell line and its use for peripheric nerve regeneration. ACTA MEDICA PORT 2005; 18:323-8. [PMID: 16611536] [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: 05/08/2023]
Abstract
Entubulation repair of peripheral nerve injuries has a lengthy history. Several experimental and clinical studies have explored the effectiveness of many biodegradable and non-degradable tubes with or without addition of molecules and cells. The main objective of the present study was to develop an economical and also an easy way for culturing a neural cell line which is capable of growing, differentiating and producing locally nerve growth factors, that are otherwise extremely expensive, inside 90 PLA/10 PLG nerve guides. For this purpose the authors have chosen the N1E-115 cell line, a clone of cells derived from mouse neuroblastoma C-1300 with the perspective of using this differentiated cellular system to cover the inside of 90 PLA/10 PLG nerve guides placed to bridge a nerve gap of 10 mm in the rat sciatic nerve experimental model. The N1E-115 cells proliferate in normal culture medium but undergo neuronal differentiation in response to DMSO. Upon induction of differentiation, proliferation of N1E-115 cells ceases, extensive neurite outgrowth is observed and the membranes become highly excitable. While it is known that Ca2+ serves as an important intracellular signal for cellular various processes, such as growth and differentiation, be toxic to cells and be involved in the triggering of events leading to excitotoxic cell death in neurons. The [Ca2+]i in non-differentiated N1E-115 cells and after distinct periods of differentiation, have been determined by the epifluorescence technique using the Fura-2-AM probe. The results of this quantitative assessment, revealed that N1E-115 cells which undergo neuronal differentiation for 48 hours in the presence of 1.5% DMSO are best qualified to be used to cover the interior of the nerve guides since the [Ca2+]i was not found to be elevated indicating thus that the onset the cell death processes was not occurred.
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Affiliation(s)
- J M Rodrigues
- Centro de Estudos de Ciência Animal, Instituto de Ciências e Tecnologias Agrárias e Agro-Alimentares, Departamento de Clínicas Veterinárias, Universidade do Porto, Portugal
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42
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Rodrigues JM, Luís AL, Lobato JV, Pinto MV, Lopes MA, Freitas M, Geuna S, Santos JD, Maurício AC. Determination of the intracellular Ca2+ concentration in the N1E-115 neuronal cell line in perspective of its use for peripheric nerve regeneration. Biomed Mater Eng 2005; 15:455-65. [PMID: 16308461] [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: 05/05/2023]
Abstract
Entubulation repair of peripheral nerve injuries has a lengthy history. Several experimental and clinical studies have explored the effectiveness of many biodegradable and non-degradable tubes with or without addition of molecules and cells. The main objective of the present study was to develop an economical and also an easy way for culturing a neural cell line which was capable of growing, differentiating and producing locally nerve growth factors that are otherwise extremely expensive, inside 90 PLA/10 PLG nerve guides. For this purpose the authors have chosen the N1E-115 cell line, a clone of cells derived from mouse neuroblastoma C-1300 with the perspective of using this differentiated cellular system to cover the inside of 90 PLA/10 PLG nerve guides placed to bridge a gap in the rat sciatic nerve experimental model. The N1E-115 cells proliferate in normal culture medium but undergo neuronal differentiation in response to DMSO. Upon induction of differentiation, proliferation of N1E-115 cells ceases, extensive neurite outgrowth is observed and the membranes become highly excitable. While it is known that Ca2+ serves as an important intracellular signal for various cellular processes, such as growth and differentiation. It is also known that can be toxic to cells and is involved in the triggering of events leading to excitotoxic cell death in neurons. The [Ca2+]i in non-differentiated N1E-115 cells and after distinct periods of differentiation, have been determined by the epifluorescence technique using the Fura-2-AM probe. The results of this quantitative assessment revealed that N1E-115 cells which undergo neuronal differentiation for 48 hours in the presence of 1.5% DMSO are best qualified to be used to cover the interior of the nerve guides since the [Ca2+]i was not found to be elevated indicating thus that the onset the cell death processes was not occurred.
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Affiliation(s)
- J M Rodrigues
- Centro de Estudos de Ciência Animal (CECA), Instituto de Ciências e Tecnologias Agrárias e Agro-Alimentares (ICETA) da Universidade do Porto, Campus Agrário de Vairão, Rua Padre Armando Quintas, 4485-661 Vairão, Portugal
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Calderon A, Teles R, Leite J, Bloch J, Astolfi-Filho S, Freitas M. Serine protease inhibitors from Amazon leguminosae seeds: purification and preliminary characterization of two chymotrypsin inhibitors from Inga umbratica. Protein Pept Lett 2001. [DOI: 10.2174/0929866013409175] [Citation(s) in RCA: 9] [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: 11/22/2022]
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44
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Freitas M, Cayuela C, Antoine JM, Piller F, Sapin C, Trugnan G. A heat labile soluble factor from Bacteroides thetaiotaomicron VPI-5482 specifically increases the galactosylation pattern of HT29-MTX cells. Cell Microbiol 2001; 3:289-300. [PMID: 11298652 DOI: 10.1046/j.1462-5822.2001.00113.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [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
The aim of this work was to set up and validate an in vitro model to study a molecular response of an intestinal host cell line (HT29-MTX), to a non-pathogen microflora component. We found that Bacteroides thetaiotaomicron strain VPI-5482 had the capacity to change a specific glycosylation process in HT29-MTX cells via a mechanism that involved a soluble factor. Differentiated HT29-MTX cells were grown in the presence of 20% of spent culture supernatant from the B. thetaiotaomicron during 10 days. Glycosylation processes were followed using a large panel of lectins and analysed using confocal microscopy, western blotting and flow cytometry techniques. Our results show that a B. thetaiotaomicron soluble factor modified specifically the galactosylation pattern of HT29-MTX cells, whereas other glycosylation steps remained mainly unaffected. Further characterization of this soluble factor indicates that it is a heat labile, low molecular weight compound. Reverse transcript-PCR (RT-PCR) analysis was unable to show any significant change in mRNA expression level of the main galactosyltransferases expressed in HT29-MTX cells. By contrast, galactosyltransferase activities dramatically increased in HT29-MTX cells treated by the soluble extract of B. thetaiotaomicron, suggesting a post-translational regulation of these activities. Our in vitro model allowed us to study the cross-talk between a single bacteria and intestinal cells. The galactosylation process appears to be a target of this communication, thus uncovering a new window to study the functional consequences of co-operative symbiotic bacterial-host interactions.
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Affiliation(s)
- M Freitas
- Danone VITAPOLE, 15 avenue Galilée, 92350 Le Plessis Robinson, France
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45
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Guimarães H, Freitas M, Machado J, Berezowski A, Pinheiro S, Magnani P, Costa F. Study of the physiology of micturition after abdominal hysterectomy by transperineal and urodynamic ultrasonography. Int J Gynaecol Obstet 2000. [DOI: 10.1016/s0020-7292(00)83503-1] [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: 11/29/2022]
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46
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Ferrer-Antunes C, Palmeiro A, Morais J, Lourenço M, Freitas M, Providência L. The mutation C677T in the methylene tetrahydrofolate reductase gene as a risk factor for myocardial infarction in the Portuguese population. Thromb Haemost 1998; 80:521-2. [PMID: 9759639] [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: 02/08/2023]
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47
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Freitas M. [Ischemic syndrome: reperfusion and myocardial cytoprotection]. Rev Port Cardiol 1997; 16:925-31, 850. [PMID: 9477728] [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: 02/06/2023] Open
Abstract
With regard to the concept of reperfusion injury, there is no doubt that the benefit of reperfusion can cause serious arrhythmias, mechanical stunning, myovascular damage, new necrosis, or as some people consider more likely, apotosis. Advances in cell biology of cardiomyocytes have been remarkable in recent years. However, it is still impossible to monitor all the events that occur in these cells, especially in relation to their function and dysfunction. Our understanding of cellular dysfunction would be enhanced if different types of morphological changes could be related to specific metabolic and functional disorders of the cells. The most important of these changes are those leading to cell necrosis. In terms of therapy, it is essential to identify and prevent the progression of these lethal processes. The concepts of modern interventional cardiology have shown that steps such as thrombolysis, primary angioplasty, relief of coronary spasm-calcium antagonists and drugs such as trimetazidine (myocardial protection) are all important to promote coronary flow and to improve tissue metabolism. The pre-treatment and treatment with trimetazidine during the experimental period is almost totally able to prevent ischemic contracture. The mode of action is metabolic. The site of action is not clear. There is a very interesting trial called EMIP, presently under way in Europe, on the use of trimetazine in early thrombolysis that may help to show that this drug could prevent reperfusion injury. The results have not yet been disclosed.
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Affiliation(s)
- M Freitas
- Serviço de Cardiologia, Hospitais da Universidade de Coimbra
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48
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Chimelli L, Freitas M, Nascimento O. Value of nerve biopsy in the diagnosis and follow-up of leprosy: the role of vascular lesions and usefulness of nerve studies in the detection of persistent bacilli. J Neurol 1997; 244:318-23. [PMID: 9178158 DOI: 10.1007/s004150050094] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Nerve biopsy specimens from 53 patients with leprosy and neuropathy were taken from the sural, the dorsal branch of the ulnar, or the superficial radial nerves and processed for light and electron microscopy. There was inflammation in 40 cases (75%), 7 with a granulomatous reaction, various stages of fibrosis in 35 (66%), and endoneurial vascular neoformation in 7. In two cases, small focal infarcts were associated with marked endoneurial inflammation compressing the vessels, in addition to endoneurial lymphocytic vasculitis. Most had an axonal neuropathy of varying degree, some with total fibre loss, others with predominant small myelinated and unmyelinated fibre loss. Signs of demyelination and remyelination were the main findings in 9 cases (17%). Bacilli were present in endothelial, perineurial, Schwann cells and in macrophages. On two occasions, they lost their alcohol acid resistance, were suspected in semithin sections, and confirmed ultrastructurally. The biopsy was decisive for the diagnosis of leprosy in 15 cases (28%), most without skin lesions. We evaluated the effectiveness of the treatment in 20 (37.7%), 12 without and 8 with bacilli, despite negativity in the skin. The diagnosis of leprosy based on skin lesions was confirmed with the nerve biopsy in 9 cases, 6 had an inflammatory neuropathy suggestive of leprosy in the absence of bacilli, and 3 had nonspecific changes in the sural nerve since the neuropathy was in the upper limbs. We conclude that nerve biopsy is indicated for the diagnosis of leprosy in cases without clinically visible skin lesions and to evaluate the effectiveness of the treatment. In these cases the ultrastructural studies are important for recognition of the bacilli. Vascular lesions may play an important role in the progression of the nerve damage, including the occurrence of focal nerve infarcts which, to our knowledge, have not been previously reported in association with leprosy.
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Affiliation(s)
- L Chimelli
- Department of Pathology, School of Medicine, Fluminense Federal University, Niterói, RJ, Brazil
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Mota JC, Ponce P, Shiang T, Freitas M, Lencastre H, Guerreiro M. Hérnia de Bochdalek no Adulto: Diagnóstico Fácil? Revista Portuguesa de Pneumologia 1996. [DOI: 10.1016/s0873-2159(15)31151-x] [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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Morais J, Franco F, Gonçalves L, Faria H, Semedo L, Alves G, Morais E, Freitas M, Providência L. [The effect of collateral circulation on preserving left ventricular function after a myocardial infarct]. Rev Port Cardiol 1995; 14:933-6. [PMID: 8541080] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Affiliation(s)
- J Morais
- Fac. de Medicina, Universidade de Coimbra
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