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Freixa MI, Inácio H, Amaral M, Martins M, Costa C, Moitinhos M, Gruner H, Almeitda A, Barreto P, Pinheiro S. AB1213 DIFFERENT IMMUNOSUPPRESSIVE REGIMENS WITH NO EFFECT ON INFLUENZA-LIKE ILLNESS. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.5975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Background:Autoimmune disease (AID) has been associated with increased risk of influenza and influenza-like illness (ILI) and its worse clinical outcomes complications.Objectives:We aimed to assess the influence and difference of several immunosuppressive (IS) treatments in the incidence of ILI, including glucocorticoids (GC), classic DMARDs and biologic DMARDs.Methods:We conducted a cross-sectional study in two autoimmune clinics. Patients were invited to answer a survey reporting ILI symptoms between October 2017 and March 2018. ILI definition was considered according to the European Center for Disease Control. Data regarding current IS, diagnostic, disease activity, comorbidities, and vaccination coverage were collected from electronic registry. Patients with history of cancer, HIV, IGIV treatment, or lack of information were excluded. Univariate and multivariate logistic regression analysis were used to access predictors of ILI.Results:We included 109 patients, with mean age 51 years and 81% female gender. The majority of patients had autoimmune arthropathy (n=54) or a connective tissue disease (n=44). Active disease was present in in 39% of patients. IS treatment was: GC 31%, classic DMARD 44%, biologic DMARD 28%. Vaccine coverage was 51%. Overall 41% reported ILI. We did not find any association between studied variables and ILI, including univariate and multivariate analysis. Univariate odds ratio calculation for IS treatment were: GC [OR 1,68 IC 0,7-3,8], classic DMARD [OR 1,03 IC 0,5-2,2], and biologic DMARD [OR 0,86 IC 0,4-2,0]. Comorbidity of pulmonary disease (n=8) may contribute to higher risk to ILI [OR 2,76 IC 0,8-10,0].Conclusion:There was no difference in risk of ILI within different IS treatment regimens, although GC may increase the risk. The study is limited by the subjectivity of the ILI survey and the small size of the sample. The stratification of influenza risk will help in designing better vaccine coverage strategies in this population.References:[1]Nakafero G, Grainge MJ, Myles PR, Mallen CD, Zhang W, Doherty M, Nguyen-Van-Tam JS, Abhishek A. Predictors and temporal trend of flu vaccination in auto-immune rheumatic diseases in the UK: a nationwide prospective cohort study. Rheumatology (Oxford). 2018 Oct 1;57(10):1726-1734.[2]Danza A, Ruiz-Irastorza G. Infection risk in systemic lupus erythematosus patients: susceptibility factors and preventive strategies. Lupus. 2013 Oct;22(12):1286-94.[3]McLean-Tooke A, Aldridge C, Waugh S, Spickett GP, Kay L. Methotrexate, rheumatoid arthritis and infection risk: what is the evidence? Rheumatology (Oxford). 2009 Aug;48(8):867-71.[4]Lacaille D, Guh DP, Abrahamowicz M, Anis AH, Esdaile JM. Use of non biologic disease-modifying antirheumatic drugs and risk of infection in patients with rheumatoid arthritis. Arthritis Rheum. 2008 Aug 15;59(8):1074-81.[5]Bernatsky S, Hudson M, Suissa S. Anti-rheumatic drug use and risk of serious infections in rheumatoid arthritis. Rheumatology (Oxford). 2007 Jul;46(7):1157-60.[6]Doran MF, Crowson CS, Pond GR, O’Fallon WM, Gabriel SE. Predictors of infection in rheumatoid arthritis. Arthritis Rheum. 2002 Sep;46(9):2294-300.[7]Fessler BJ. Infectious diseases in systemic lupus erythematosus: risk factors, management and prophylaxis. Best Pract Res Clin Rheumatol. 2002 Apr;16(2):281-91. Review.[8]Singh JA, Wells GA, Christensen R, Tanjong Ghogomu E, Maxwell L, Macdonald JK, Adverse effects of biologics: a network meta-analysis and Cochrane overview. Cochrane Database Syst Rev. 2011 Feb 16;(2):CD008794.Acknowledgments:None.Disclosure of Interests:None declared
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Boaventura S, Rodrigues J, Plancha T, Martins M, Silva M, Silva VB, Horta L, Branco PS. [Assessment of Time Allocated to Pedestrian Crossing: A Contribution for a More Inclusive Lisbon]. ACTA MEDICA PORT 2020; 33:401-406. [PMID: 32504515 DOI: 10.20344/amp.12527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Accepted: 10/30/2019] [Indexed: 11/20/2022]
Abstract
INTRODUCTION With progressive ageing of the Portuguese population, it is paramount that the conditions of outdoor accessibility and safety are adapted to this age group. The aim of this study was to assess whether the time allocated to pedestrian crossing in the crosswalks with pedestrian crossing lights between Curry Cabral Hospital and local public transport is enough to allow safe passage of the elderly. MATERIAL AND METHODS We evaluated 100 ambulatory care patients from the Physical Medicine and Rehabilitation department. All of them answered a questionnaire, the Activities-Specific Balance Confidence Scale (Portuguese version) and performed a 10-meter walk test. All crosswalks with pedestrian crossing lights between the hospital and local public transport were analyzed, in a total of 26, and the gait speed required to perform a safe crossing was calculated. RESULTS Mean age of patients was 75 years and the majority (73%) were female. The study showed that all patients could safely cross 17 (65%) crosswalks. The nine remaining crosswalks (35%) represented an obstacle to our sample. DISCUSSION If the required gait speed as currently set in legislation for the disabled was implemented, 99% of the patients would have been able to cross the crosswalks safely. CONCLUSION It is essential to apply the gait speed set in legislation, since non-compliance endangers elderly patients in Curry Cabral Hospital, increasing the likelihood of accidents and the feeling of insecurity on the streets.
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Perry-Sassmannshausen A, Buhr T, Borovik A, Martins M, Reinwardt S, Ricz S, Stock SO, Trinter F, Müller A, Fritzsche S, Schippers S. Multiple Photodetachment of Carbon Anions via Single and Double Core-Hole Creation. PHYSICAL REVIEW LETTERS 2020; 124:083203. [PMID: 32167340 DOI: 10.1103/physrevlett.124.083203] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Accepted: 01/29/2020] [Indexed: 06/10/2023]
Abstract
We report on new measurements of m-fold photodetachment (m=2-5) of carbon anions via K-shell excitation and ionization. The experiments were carried out employing the photon-ion merged-beams technique at a synchrotron light source. While previous measurements were restricted to double detachment (m=2) and to just the lowest-energy K-shell resonance at about 282 eV, our absolute experimental m-fold detachment cross sections at photon energies of up to 1000 eV exhibit a wealth of new thresholds and resonances. We tentatively identify these features with the aid of detailed atomic-structure calculations. In particular, we find unambiguous evidence for fivefold detachment via double K-hole production.
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Vazi E, Holanda F, Santos N, Cardoso C, Bachi A, Martins M, Bondan E. Extensive Astrogliosis Induced by Short-term Methotrexate Administration. J Comp Pathol 2020. [DOI: 10.1016/j.jcpa.2019.10.054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Martins M, du Merle L, Trieu-Cuot P, Dramsi S. Heterogeneous expression of Pil3 pilus is critical for Streptococcus gallolyticus translocation across polarized colonic epithelial monolayers. Microbes Infect 2020; 22:55-59. [DOI: 10.1016/j.micinf.2019.12.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 11/30/2019] [Accepted: 12/02/2019] [Indexed: 01/10/2023]
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Mieiro CL, Martins M, da Silva M, Coelho JP, Lopes CB, da Silva AA, Alves J, Pereira E, Pardal M, Costa MH, Pacheco M. Advances on assessing nanotoxicity in marine fish - the pros and cons of combining an ex vivo approach and histopathological analysis in gills. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2019; 217:105322. [PMID: 31639587 DOI: 10.1016/j.aquatox.2019.105322] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 09/30/2019] [Accepted: 09/30/2019] [Indexed: 06/10/2023]
Abstract
The need to overcome logistic and ethical limitations of in vivo nanotoxicity evaluation in marine organisms is essential, mostly when dealing with fish. It is well established that medium/solvent conditions affect dispersion and agglomeration of nanoparticles (NPs), which represents a constraint towards a solid and realistic toxicity appraisal. In this way the pros and cons of an ex vivo approach, using a simplified exposure medium (seawater) and addressing gills histopathology, were explored. The nanotoxic potential of environmentally realistic concentrations of titanium dioxide NPs (TiO2 NPs) was also assessed, disclosing the morpho-functional effects on the gills and the possible uptake/elimination processes. Excised gills of the Senegalese sole (Solea senegalensis) were directly exposed in artificial seawater to 20 and 200 μg L-1 TiO2 NPs, for 2 h and 4 h. Semi-quantitative and quantitative histological analyses were applied. The normal morphology of the gill's epithelia was only slightly altered in the control, reflecting protective mechanisms against the artificiality of the experimental conditions, which, together with the absence of differences in the global histopathological index (Ih), corroborated that the gill's morpho-functional features were not compromised, thereby validating the proposed ex vivo approach. TiO2 NPs induced moderate severity and dissemination of histopathological lesions. After 2 h, a series of compensatory mechanisms occurred in NP treatments, implying an efficient response of the innate defense system (increasing number of goblet cells) and effective osmoregulatory ability (chloride cells proliferation). After 4 h, gills revealed signs of recovery (normalization of the number of chloride and goblet cells; similar Ih), highlighting the tissue viability and effective elimination and/or neutralization of NPs. The uptake of the TiO2 NPs seemed to be favored by the higher particle sizes. Overall, the proposed approach emerged as a high-throughput, reliable, accurate and ethically commendable methodology for nanotoxicity assessment in marine fish.
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Liu L, Garbutt C, Golkaram M, Kaplan S, Martins M, Casino S, Mansinho A, Macedo D, Alvim C, Costa A, Fernandes A, Ferreira C, Aldeia F, Quintela A, Costa L, So A, Zhang S, Pawlowski T. Microsatellite instability testing and lynch syndrome screening for colorectal cancer patients through tumour sequencing. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz257.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Bartlett E, Kemp S, Desai S, Mirsadraee S, Ridge C, Morjaria J, Shah P, Morris K, Derbyshire J, Chen M, Peacock C, Ivashniova N, Martins M, Addis J, Padley S, Devaraj A. MA10.10 Uptake in Lung Cancer Screening – Does CT Location Matter? A Pilot Study Comparison of a Mobile and Hospital Based CT Scanner. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Ferreira A, Paulo S, Coutinho J, Matos Ó, Martins M, Rocha E. Hepatitis B surface antigen positivity after vaccination: A case report. Clin Chim Acta 2019. [DOI: 10.1016/j.cca.2019.03.497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Martins M, Campôa E, Ferreira M, Reis-Pina P. Autonomy and dyspnea in palliative care: A case report. Pulmonology 2019; 26:105-107. [PMID: 31160236 DOI: 10.1016/j.pulmoe.2019.05.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 04/30/2019] [Accepted: 05/02/2019] [Indexed: 11/17/2022] Open
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Costa D, Silva CRD, Rodrigez A, Oliveira V, Martins M, Neto RS, Teixeira R. Parcial resection of the jaw for the treatment of extensive ameloblastoma: a case report. Int J Oral Maxillofac Surg 2019. [DOI: 10.1016/j.ijom.2019.03.700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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de Oliveira V, Martins M, Silva C, Rodriguez A, Costa D, Neto R, Teixeira R. Can injection of hyaluronic acid cause pigmented villonodular synovitis to the temporomandibular joint? a rare case report. Int J Oral Maxillofac Surg 2019. [DOI: 10.1016/j.ijom.2019.03.865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Rodriguez A, Costa D, Martins M, Oliveira V, Neto RS, Teixeira R. Zygomatic complex fractures: can two-point fixation be safe? Int J Oral Maxillofac Surg 2019. [DOI: 10.1016/j.ijom.2019.03.128] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Rodriguez A, Silva C, Costa D, Martins M, Oliveira V, Neto R, Teixeira R, Aguiar N, Chavantes M. Low level laser therapy as coadjuvant in bisphosphonate related osteonecrosis of the jaws: a pilot study. Int J Oral Maxillofac Surg 2019. [DOI: 10.1016/j.ijom.2019.03.314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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da Silva C, Rodriguez A, Costa D, Martins M, Oliveira V, Saad Neto R. Keratocystic odontogenic tumor: case report. Int J Oral Maxillofac Surg 2019. [DOI: 10.1016/j.ijom.2019.03.747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Murad R, Silva C, Rodriguez A, Costa D, Oliveira V, Martins M, Teixeira R. Closed treatment for condylar process fracture, is the best option? Int J Oral Maxillofac Surg 2019. [DOI: 10.1016/j.ijom.2019.03.618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Monteiro L, Delgado ML, Garcês F, Machado M, Ferreira F, Martins M, Salazar F, Pacheco JJ. A histological evaluation of the surgical margins from human oral fibrous-epithelial lesions excised with CO2 laser, Diode laser, Er:YAG laser, Nd:YAG laser, electrosurgical scalpel and cold scalpel. Med Oral Patol Oral Cir Bucal 2019; 24:e271-e280. [PMID: 30818322 PMCID: PMC6441595 DOI: 10.4317/medoral.22819] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 02/15/2019] [Indexed: 11/17/2022] Open
Abstract
Background We aim to evaluate the presence of histological artefacts in the surgical margins of human oral fibro-epithelial hyperplasias excised with lasers of different wavelengths, and also electrosurgical scalpel and cold scalpel. Moreover, we aim to determine if some of these instruments could impair the normal histological diagnosis of these lesions. Material and Methods We included 130 consecutive surgical samples of 80 females and 50 males (mean age of 53.82±16.55) with a histological diagnosis of an oral benign fibrous-epithelial hyperplasias. The samples were categorized into 6 groups according to the type of instrument used: CO2 laser group, diode laser group, Er:YAG laser group, Nd:YAG laser group, electrosurgical scalpel group and cold scalpel group. Histological instrument-induced changes were microscopic evaluated and related with clinical and pathological variables. Results The instrument with highest tissue damage extension (TDE) was the electrosurgical scalpel (1002.2µm±434.92), followed by diode laser (913.73 µm±322.45), Nd:YAG (899.83µm±327.75), CO2 laser (538.37µm±170.50), Er:YAG laser (166.47µm±123.85), and at last with fewer alterations the cold scalpel group (2.36µm±7.27) (P< 0.001). The most regular incision was observed in CO2 laser group, followed by Er:YAG laser, Nd:YAG laser, electrosurgical scalpel and diode laser group with the less regular incision using cold scalpel as comparison (P< 0.001). A correlation was found between the incision score and TDE (P< 0.001). Regarding histological diagnosis, no case showed any limitation of diagnosis related with the use of any instrument evaluated. Conclusions Our results suggest that lasers can be used for the excision of oral benign fibrous-epithelial hyperplasias, without hispathological diagnosis limitations, as long as the physical properties of each laser are known and respected. Er:YAG laser have shown to be a laser with few tissue damage extension and with good incision regularity, been a possible instrument of choice for the surgical removal of these lesions. Key words:CO2 laser, diode laser, Er:YAG laser, Nd:YAG laser, oral mucosa.
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Costa R, Ferreira I, Pedroso A, Martins M, Gouveia C, de Sousa IE, Vicente P. A Reflection on the Use of Enoxaparin Based on Three Case Reports. Eur J Case Rep Intern Med 2019; 5:001000. [PMID: 30756002 PMCID: PMC6346970 DOI: 10.12890/2018_001000] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 11/23/2018] [Indexed: 11/30/2022] Open
Abstract
Enoxaparin is indicated for the treatment or prevention of many clinical disorders including deep vein thromboembolism, atrial fibrillation and mechanical valve thrombosis. It is one of the most commonly prescribed drugs in hospitals. However, haemorrhagic complications can occur, particularly in the elderly, patients with renal function impairment and patients with a very high or very low body weight. The authors describe the cases of three patients who had one or more risk factors for haemorrhagic complications, such as abdominal haematomas. The clinical presentation was similar in all three cases, with sudden-onset abdominal pain, an altered state of consciousness and hypotension. In all cases, investigation showed acute anaemia and large abdominal haematomas on imaging studies. A conservative approach was taken in the three patients, with suspension and reversal of anticoagulation, fluid resuscitation and red blood cell transfusion. Haemodynamic stability was achieved in two of the patients, but the third patient died. The authors consider it is important to present these case reports because of the widespread use of enoxaparin, and the need for rigorous dose adjustment for renal function variations and body weight. We hope this article raises awareness of haemorrhagic complications in high-risk groups and propose protocols are introduced for dose adjustment and monitoring the efficacy of enoxaparin.
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Perrier A, Postic B, Martins M, Rutault L, Buvat A, Bécourt-Lhote N, Claude N, Aerts H. In vitro Cardiotoxicity evaluation on hiPSC using phenotypic analysis. Toxicol Lett 2018. [DOI: 10.1016/j.toxlet.2018.06.635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Jardim JC, Amaral BP, Martins M, Sebastian P, Heinemann MB, Cortez A, Weiblen R, Flores EF. Respiratory signs, fever and lymphopenia in calves inoculated with Brazilian HoBi-like pestiviruses. Microb Pathog 2018; 123:264-268. [PMID: 30040999 DOI: 10.1016/j.micpath.2018.07.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Revised: 07/18/2018] [Accepted: 07/20/2018] [Indexed: 11/24/2022]
Abstract
Hobi-like viruses (HobiPeV) comprise a novel, recently classified species of bovine pestiviruses, originally identified in commercial fetal bovine serum of Brazilian origin and, subsequently, isolated from diseased animals in several countries. Although frequently isolated from clinical cases, most HobiPeV isolates failed to reproduce overt disease in cattle upon experimental inoculation. Herein, we describe the outcome of experimental infection of four to six months-old seronegative calves with two Brazilian HobiPeV isolates. Calves inoculated intranasally with isolate SV478/07 developed viremia between days 2 and 9 post-inoculation (pi) and shed virus in nasal secretions up to day 11pi. These animals presented hyperthermia (day 7 to 10-11 pi) and lymphopenia from days 4 to 8pi. Clinically, all four calves developed varied degrees of apathy, anorexia, mild to moderate respiratory signs (nasal secretion, hyperemia), ocular discharge and pasty diarrhea in the days following virus inoculation. In contrast, calves inoculated with isolate SV757/15 presented only hyperthermia (days 3 to 10-11 pi) and lymphopenia (days 4-8 pi), without other apparent clinical signs. In these animals, viremia was detected up to day 9 pi and virus shedding in nasal secretions lasted up to day 12-14 pi. Both groups seroconverted to the inoculated viruses, developing virus neutralizing (VN) titers from 320 to 5120 at day 28pi. These results extend previous findings that experimental infections of calves with HobiPeV are predominantly mild, yet they also indicate that field isolates may differ in their ability to cause disease in susceptible animals.
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Teodoro T, Martins M, Salgado J. 468 Sexual behaviors in dementia patients. J Sex Med 2018. [DOI: 10.1016/j.jsxm.2018.04.375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Gallego-Paez L, Martins M, Barbosa-Morais N. PO-358 CELf2 at the core of a prognostic alternative splicing signature in colorectal cancer. ESMO Open 2018. [DOI: 10.1136/esmoopen-2018-eacr25.870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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Cuevas N, Martins M, Rodrigo AP, Martins C, Costa PM. Explorations on the ecological role of toxin secretion and delivery in jawless predatory Polychaeta. Sci Rep 2018; 8:7635. [PMID: 29769587 PMCID: PMC5955894 DOI: 10.1038/s41598-018-26031-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Accepted: 05/04/2018] [Indexed: 11/17/2022] Open
Abstract
Motivated by biotechnological prospects, there is increasing evidence that we may just be scraping the tip of the iceberg of poisonous marine invertebrates, among which the Polychaeta are promising candidates for bioprospecting. Here we show that an inconspicuous phyllodocid uses toxins in its uncanny feeding strategy. The worm, a jawless active predator characterised by its bright green colour, preys on larger invertebrates (including conspecifics) by extracting tissue portions with its powerful proboscis through suction. The animal is even able to penetrate through the valves and plates of live molluscs and barnacles. Observations in situ and a series of experiments demonstrated that the worm compensates its simple anatomy with secretion of a novel toxin, or mixture of toxins, referred to by us as "phyllotoxins". These are carried by mucus and delivered via repeated contact with the tip of the proboscis until the prey is relaxed or immobilised (reversibly). Proteolytic action permeabilises material to toxins and softens tissue to enable extraction by suction. The findings show that toxins are a major ecological trait and therefore play a key role in evolutionary success and diversification of Polychaeta, demonstrating also that understanding adaptative features may become the best showcase for novel animal toxins.
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Dias S, Gama A, Abrantes P, Akpogheneta O, Reigado V, Ferreira A, Carreiras E, Mora C, Simões D, Martins M. 5.5-O3Examining sexual risk, HIV infection and health services use: a cluster analysis with sub-Saharan African migrants. Eur J Public Health 2018. [DOI: 10.1093/eurpub/cky047.187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Pasquereau-Kotula E, Martins M, Aymeric L, Dramsi S. Significance of Streptococcus gallolyticus subsp. gallolyticus Association With Colorectal Cancer. Front Microbiol 2018; 9:614. [PMID: 29666615 PMCID: PMC5891635 DOI: 10.3389/fmicb.2018.00614] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Accepted: 03/16/2018] [Indexed: 12/22/2022] Open
Abstract
Streptococcus gallolyticus subsp. gallolyticus Sgg (formerly known as S. bovis type I) is the main causative agent of septicemia and infective endocarditis (IE) in elderly and immunocompromised persons. It belongs to the few opportunistic bacteria, which have been strongly associated to colorectal cancer (CRC). A literature survey covering a period of 40 years (1970–2010) revealed that 65% of patients diagnosed with an invasive Sgg infection had a concomitant colorectal neoplasia. Sgg is associated mainly with early adenomas and may thus constitute an early marker for CRC screening. Sgg has been described as a normal inhabitant of the rumen of herbivores and in the digestive tract of birds. It is more rarely detected in human intestinal tract (2.5–15%). Recent molecular analyses indicate possible zoonotic transmission of Sgg. Thanks to the development of a genetic toolbox and to comparative genomics, a number of factors that are important for Sgg pathogenicity have been identified. This review will highlight the role of Sgg pili in host colonization and how their phase-variable expression contributes to mitigate the host immune responses and finally their use as serological diagnostic tool. We will then present experimental data addressing the core question whether Sgg is a cause or consequence of CRC. We will discuss a few recent studies examining the etiological versus non-etiological participation of Sgg in colorectal cancer with the underlying mechanisms.
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Müller A, Borovik A, Bari S, Buhr T, Holste K, Martins M, Perry-Saßmannshausen A, Phaneuf RA, Reinwardt S, Ricz S, Schubert K, Schippers S. Near-K-Edge Double and Triple Detachment of the F^{-} Negative Ion: Observation of Direct Two-Electron Ejection by a Single Photon. PHYSICAL REVIEW LETTERS 2018; 120:133202. [PMID: 29694177 DOI: 10.1103/physrevlett.120.133202] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Indexed: 06/08/2023]
Abstract
Double and triple detachment of the F^{-}(1s^{2}2s^{2}2p^{6}) negative ion by a single photon have been investigated in the photon energy range 660 to 1000 eV. The experimental data provide unambiguous evidence for the dominant role of direct photodouble detachment with a subsequent single-Auger process in the reaction channel leading to F^{2+} product ions. Absolute cross sections were determined for the direct removal of a (1s+2p) pair of electrons from F^{-} by the absorption of a single photon.
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Müller L, Hartmann G, Schleitzer S, Berntsen MH, Walther M, Rysov R, Roseker W, Scholz F, Seltmann J, Glaser L, Viefhaus J, Mertens K, Bagschik K, Frömter R, De Fanis A, Shevchuk I, Medjanik K, Öhrwall G, Oepen HP, Martins M, Meyer M, Grübel G. Note: Soft X-ray transmission polarizer based on ferromagnetic thin films. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2018; 89:036103. [PMID: 29604789 DOI: 10.1063/1.5018396] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A transmission polarizer for producing elliptically polarized soft X-ray radiation from linearly polarized light is presented. The setup is intended for use at synchrotron and free-electron laser beamlines that do not directly offer circularly polarized light for, e.g., X-ray magnetic circular dichroism (XMCD) measurements or holographic imaging. Here, we investigate the degree of ellipticity upon transmission of linearly polarized radiation through a cobalt thin film. The experiment was performed at a photon energy resonant to the Co L3-edge, i.e., 778 eV, and the polarization of the transmitted radiation was determined using a polarization analyzer that measures the directional dependence of photo electrons emitted from a gas target. Elliptically polarized radiation can be created at any absorption edge showing the XMCD effect by using the respective magnetic element.
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Waitz M, Bello RY, Metz D, Lower J, Trinter F, Schober C, Keiling M, Lenz U, Pitzer M, Mertens K, Martins M, Viefhaus J, Klumpp S, Weber T, Schmidt LPH, Williams JB, Schöffler MS, Serov VV, Kheifets AS, Argenti L, Palacios A, Martín F, Jahnke T, Dörner R. Imaging the square of the correlated two-electron wave function of a hydrogen molecule. Nat Commun 2017; 8:2266. [PMID: 29273745 PMCID: PMC5741688 DOI: 10.1038/s41467-017-02437-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 11/30/2017] [Indexed: 11/23/2022] Open
Abstract
The toolbox for imaging molecules is well-equipped today. Some techniques visualize the geometrical structure, others the electron density or electron orbitals. Molecules are many-body systems for which the correlation between the constituents is decisive and the spatial and the momentum distribution of one electron depends on those of the other electrons and the nuclei. Such correlations have escaped direct observation by imaging techniques so far. Here, we implement an imaging scheme which visualizes correlations between electrons by coincident detection of the reaction fragments after high energy photofragmentation. With this technique, we examine the H2 two-electron wave function in which electron–electron correlation beyond the mean-field level is prominent. We visualize the dependence of the wave function on the internuclear distance. High energy photoelectrons are shown to be a powerful tool for molecular imaging. Our study paves the way for future time resolved correlation imaging at FELs and laser based X-ray sources. Electron-electron correlation is a complex and interesting phenomenon that occurs in multi-electron systems. Here, the authors demonstrate the imaging of the correlated two-electron wave function in hydrogen molecule using the coincident detection of the electron and proton after the photoionization.
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Monteiro L, Barbieri C, Warnakulasuriya S, Martins M, Salazar F, Pacheco JJ, Vescovi P, Meleti M. Type of surgical treatment and recurrence of oral leukoplakia: A retrospective clinical study. Med Oral Patol Oral Cir Bucal 2017; 22:e520-e526. [PMID: 28809365 PMCID: PMC5694172 DOI: 10.4317/medoral.21645] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Accepted: 02/19/2017] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Oral leukoplakia (OL) is the most typical potentially malignant disorder of the oral mucosa. We aimed to evaluate the clinical outcome of oral leukoplakia treated with several types of lasers and with the use of quantic molecular resonance (QMR) lancet, in terms of recurrence rate. MATERIAL AND METHODS Eighty-seven previously untreated OL (52 occurring in females and 35 in males, mean age of 59.4 ± 13.9 years) were consecutively submitted to surgical treatment at University Hospital of Parma, Italy, and Hospital de Valongo, Portugal, (1999 to 2012). Interventions were subclassified into 5 groups according to the instrument used for the surgical removal of OL (cold blade - 17; Nd:YAG 1064nm laser - 14; Er:YAG 2940nm laser - 33; CO2 10600nm laser - 15; and QMR scalpel - 8). The mean follow-up period after treatment was 21.6 months (range 1-151 months). The outcome of treatment was scored through the same clinical protocol in the two participating units. Statistical analysis were carried by univariate analysis using chi-square test (or Pearson's test when appropriate). RESULTS Recurrences were observed in 24 cases of OL (27.6%). Malignant transformation occurred in one patient (1.1%) after a period of 35 months. Statistical comparison of the 5 surgical treatment modalities showed no differences in clinical outcomes nor in the recurrence rate of OL. However, when Er:YAG laser group was compared with traditional scalpel, a significantly better outcome in cases treated with Er:YAG laser (P = 0.015) was highlighted. CONCLUSIONS Our results suggests that Er:YAG laser could be a promising option for the treatment of OL.
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Cruz CF, Ribeiro A, Martins M, Cavaco-Paulo A. Effect of a peptide in cosmetic formulations for hair volume control. Int J Cosmet Sci 2017; 39:600-609. [PMID: 28703864 DOI: 10.1111/ics.12415] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Accepted: 07/09/2017] [Indexed: 12/01/2022]
Abstract
OBJECTIVE The capacity of hair to absorb water causes changes in its physical and cosmetic properties under different environmental conditions. Hence, the control of hair volume in variable relative humidity settings is an important topic in cosmetics. The behaviour of two types of hair, Caucasian and Asian, was studied regarding their volume change in different relative humidity conditions. The ability of a peptide as a hair volume treatment was evaluated in two climate control formulations. METHODS Tresses of the two types of hair were tested in two relative humidity (RH) conditions: (A) variable relative humidity (2 h 40% RH, followed by 2 h 90% RH and 2 h of 40% RH), and (B) continuous high relative humidity (90% RH for 6 h). Changes in the hair tress volume were assessed throughout time. Hair treated with two climate control formulations, with and without a peptide (KP peptide), were tested under the two relative humidity conditions. RESULTS Caucasian hair had a higher change in volume compared to the Asian hair in variable and high relative humidity conditions. The hair volume increase when subject to high air humidity, and it was lower with the incorporation of a peptide into climate control formulations. CONCLUSION Caucasian hair showed higher volume than Asian hair when submitted to both relative humidity conditions. The incorporation of the peptide into the climate control formulations, a base (mostly composed of water ≈ 94%) and an ethanolic, was found to reduce the volume of Caucasian hair tresses. The presence of the peptide improved the hair volume change more than 60% in high relative humidity conditions.
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Cardoso A, Medeiros M, Martins M, Padilha W, Cavalcanti A. Condição bucal de crianças e adolescentes brasileiros institucionalizados com paralisia cerebral. ACTA ACUST UNITED AC 2017. [DOI: 10.24873/j.rpemd.2017.07.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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82
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Martins M, Fernandes R. A case of neurosyphilis in a patient presenting with bipolar mixed episode suggestive symptoms. Eur Psychiatry 2017. [DOI: 10.1016/j.eurpsy.2017.02.318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
IntroductionSyphilis is a sexually transmitted disease caused by Treponema pallidum. Early invasion of the central nervous system might occur early in the course of the disease. Clinical manifestations may include acute meningeal syphilis, meningovascular syphilis, paretic neurosyphilis and tabetic neurosyphilis. Psychiatric symptoms are often the presenting symptoms of this illness and the correct diagnosis involves both a high degree of suspicion and adequate diagnostic tests.ObjectivesThe authors report a case of a patient, with no previous history of mental illness, initially admitted in a psychiatric unit with a clinical picture suggestive of a mixed bipolar disorder episode who has been diagnosed with neurosyphilis a year after.MethodsReview of clinical records and complementary exams.ResultsBy the first admission, the patient presented with depressed and irritable mood, emotional lability, aggressiveness, grandiose and racing thoughts. Upon discharge, he was diagnosed with bipolar disorder and referred to ambulatory unit. The following year he starts presenting cognitive deficits and a progressive loss of autonomy in daily living activities, being referred to neurology evaluation. A year after the first admission, he is admitted in a neurology unit and diagnosed with neurosyphilis.ConclusionsCurrent prevalence of symptomatic neurosyphilis in Western Europe is unknown. Atypical cases presenting with heterogeneous psychiatric and neurologic symptoms, with no previous history of mental illness, should raise a high index of clinical suspicion, since consequences for the patient's health might be severe if not properly diagnosed and treated.Disclosure of interestThe authors have not supplied their declaration of competing interest.
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Oliveira J, Martins M, Pinto Leite R, Sousa M, Santos R. The new neuromuscular disease related with defects in the ASC-1 complex: report of a second case confirms ASCC1 involvement. Clin Genet 2017; 92:434-439. [PMID: 28218388 DOI: 10.1111/cge.12997] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 02/13/2017] [Accepted: 02/14/2017] [Indexed: 12/25/2022]
Abstract
Next-generation sequencing technology aided the identification of the underlying genetic cause in a female newborn with a severe neuromuscular disorder. The patient presented generalized hypotonia, congenital bone fractures, lack of spontaneous movements and poor respiratory effort. She died within the first days of life. Karyotyping and screening for several genes related with neuromuscular diseases all tested negative. A male sibling was subsequently born with the same clinical presentation. Whole-exome sequencing was performed with variant filtering assuming a recessive disease model. Analysis focused on genes known to be related firstly with congenital myopathies, extended to muscle diseases and finally to other neuromuscular disorders. No disease-causing variants were identified. A similar disorder was described in patients with recessive variants in two genes: TRIP4 (three families) and ASCC1 (one family), both encoding subunits of the nuclear activating signal cointegrator 1 (ASC-1) complex. Our patient was also found to have a homozygous frameshift variant (c.157dupG, p.Glu53Glyfs*19) in ASCC1 , thereby representing the second known case. This confirms ASCC1 involvement in a severe neuromuscular disease lying within the spinal muscular atrophy or primary muscle disease spectra.
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Ribeiro da Silva C, Rodriguez A, Costa D, Martins M, Oliveira V, Neto RM. Bisphosphonate-related osteonecrosis of the jaws: our experience in up to 120 cases. Int J Oral Maxillofac Surg 2017. [DOI: 10.1016/j.ijom.2017.02.513] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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85
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Ribeiro da Silva C, Rodriguez A, Costa D, Martins M, Oliveira V, Murad Neto R. Total maxillectomy for treatment of bisphosphonates osteonecrosis: diagnosis and reconstruction. Report of two cases. Int J Oral Maxillofac Surg 2017. [DOI: 10.1016/j.ijom.2017.02.1051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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86
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Neto R, Xavier CE, Rodrigues A, Martins M, Marti D, Oliveira V. Dental implants used to replace structures of the maxillofacial complex. Int J Oral Maxillofac Surg 2017. [DOI: 10.1016/j.ijom.2017.02.1139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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87
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Cruz CF, Martins M, Egipto J, Osório H, Ribeiro A, Cavaco-Paulo A. Changing the shape of hair with keratin peptides. RSC Adv 2017. [DOI: 10.1039/c7ra10461h] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Here we propose a solution which will replace harsh reducing agents at alkaline pH by peptide formulations acting at neutral pH to change hair shape through the re-conformation of disulphide bonds.
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Martins M, Wagner V, Webber L, Salvadori G, Fonseca F, Castilho R, Squarize C, Vargas P. EXPRESSION OF MUTS± COMPLEX PROTEINS PREDICTS POOR PROGNOSIS IN ORAL SQUAMOUS CELL CARCINOMA. Oral Surg Oral Med Oral Pathol Oral Radiol 2016. [DOI: 10.1016/j.oooo.2016.06.085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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89
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Martins M, Porrini C, du Merle L, Danne C, Robbe-Masselot C, Trieu-Cuot P, Dramsi S. The Pil3 pilus of Streptococcus gallolyticus binds to intestinal mucins and to fibrinogen. Gut Microbes 2016; 7:526-532. [PMID: 27656949 PMCID: PMC5153612 DOI: 10.1080/19490976.2016.1239677] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Streptococcus gallolyticus is a commensal bacterium responsible for infectious endocarditis in the elderly, which has frequently been associated with colonic carcinoma. Whether this species is a cause or a consequence of colorectal cancer remains unknown. We recently demonstrated that S. gallolyticus Pil3 pilus is required for adhesion to colonic mucus and for colonization of mouse distal colon. We show here that Pil3 pilus binds equally well to human colonic mucins derived from HT29-MTX cells and to human stomach mucins from healthy donors. In addition, we have found that Pil3 also binds to human fibrinogen, which expands the repertoire of Pil3 host ligands.
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Da Silva DD, Ferreira A, Martins M, Valente M, Remião F, Carvalho F, Bastos M, Carmo H. In vitro neurotoxicity of ‘Legal X’: The combination of 1-benzylpiperazine (BZP) and 1-(m-trifluoromethylphenyl)piperazine (TFMPP) induces mitochondrial impairment and disrupts thiol homeostasis in dopaminergic SH-SY5Y cells. Toxicol Lett 2016. [DOI: 10.1016/j.toxlet.2016.06.1877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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91
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Martins M, Pinto A, Bravo R, Carmo H, Carvalho F, Bastos M, Dinis-Oliveira R, da Silva DD. Cocaine combined with heroin/morphine or ethanol disrupts mitochondrial and oxidative homeostasis. Toxicol Lett 2016. [DOI: 10.1016/j.toxlet.2016.06.1849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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92
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Waitz M, Metz D, Lower J, Schober C, Keiling M, Pitzer M, Mertens K, Martins M, Viefhaus J, Klumpp S, Weber T, Schmidt-Böcking H, Schmidt LPH, Morales F, Miyabe S, Rescigno TN, McCurdy CW, Martín F, Williams JB, Schöffler MS, Jahnke T, Dörner R. Two-Particle Interference of Electron Pairs on a Molecular Level. PHYSICAL REVIEW LETTERS 2016; 117:083002. [PMID: 27588854 DOI: 10.1103/physrevlett.117.083002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Indexed: 06/06/2023]
Abstract
We investigate the photodouble ionization of H_{2} molecules with 400 eV photons. We find that the emitted electrons do not show any sign of two-center interference fringes in their angular emission distributions if considered separately. In contrast, the quasiparticle consisting of both electrons (i.e., the "dielectron") does. The work highlights the fact that nonlocal effects are embedded everywhere in nature where many-particle processes are involved.
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Martins J, Alexandrino H, Oliveira R, Cipriano M, Falcão D, Ferreira L, Martins R, Serôdio M, Martins M, Tralhão J, Prado e Castro L, Castro e Sousa F. Sinusoidal dilation increases the risk of complications in hepatectomy for CRCLM – Protective effect of bevacizumab and diabetes mellitus, serum gamma-glutamyltranspeptidase as predictive factor. Eur J Surg Oncol 2016; 42:713-21. [DOI: 10.1016/j.ejso.2016.02.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 01/25/2016] [Accepted: 02/11/2016] [Indexed: 12/18/2022] Open
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Beeck T, Baev I, Gieschen S, Meyer H, Meyer S, Palutke S, Feulner P, Uhlig K, Martins M, Wurth W. New experimental perspectives for soft x-ray absorption spectroscopies at ultra-low temperatures below 50 mK and in high magnetic fields up to 7 T. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2016; 87:045116. [PMID: 27131716 DOI: 10.1063/1.4947516] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A new ultra-low temperature experiment including a superconducting vector magnet has been developed for soft x-ray absorption spectroscopy experiments at third generation synchrotron light sources. The sample is cooled below 50 mK by a cryogen free (3)He-(4)He dilution refrigerator. At the same time, magnetic fields of up to ±7 T in the horizontal direction and ±0.5 T in the vertical direction can be applied by a superconducting vector magnet. The setup allows to study ex situ and in situ prepared samples, offered by an attached UHV preparation chamber with load lock. The transfer of the prepared samples between the preparation section and the dilution refrigerator is carried out under cryogenic temperatures. First commissioning studies have been carried out at the Variable Polarization XUV Beamline P04 at PETRA III and the influence of the incident photon beam to the sample temperature has been studied.
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Martins M, Boavida JM, Raposo JF, Froes F, Nunes B, Ribeiro RT, Macedo MP, Penha-Gonçalves C. Diabetes hinders community-acquired pneumonia outcomes in hospitalized patients. BMJ Open Diabetes Res Care 2016; 4:e000181. [PMID: 27252873 PMCID: PMC4879333 DOI: 10.1136/bmjdrc-2015-000181] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Revised: 04/04/2016] [Accepted: 04/28/2016] [Indexed: 12/15/2022] Open
Abstract
OBJECTIVES This study aimed to estimate the prevalence of diabetes mellitus (DM) in hospitalized patients with community-acquired pneumonia (CAP) and its impact on hospital length of stay and in-hospital mortality. RESEARCH DESIGN AND METHODS We carried out a retrospective, nationwide register analysis of CAP in adult patients admitted to Portuguese hospitals between 2009 and 2012. Anonymous data from 157 291 adult patients with CAP were extracted from the National Hospital Discharge Database and we performed a DM-conditioned analysis stratified by age, sex and year of hospitalization. RESULTS The 74 175 CAP episodes that matched the inclusion criteria showed a high burden of DM that tended to increase over time, from 23.7% in 2009 to 28.1% in 2012. Interestingly, patients with CAP had high DM prevalence in the context of the national DM prevalence. Episodes of CAP in patients with DM had on average 0.8 days longer hospital stay as compared to patients without DM (p<0.0001), totaling a surplus of 15 370 days of stay attributable to DM in 19 212 admissions. In-hospital mortality was also significantly higher in patients with CAP who have DM (15.2%) versus those who have DM (13.5%) (p=0.002). CONCLUSIONS Our analysis revealed that DM prevalence was significantly increased within CAP hospital admissions, reinforcing other studies' findings that suggest that DM is a risk factor for CAP. Since patients with CAP who have DM have longer hospitalization time and higher mortality rates, these results hold informative value for patient guidance and healthcare strategies.
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Palutke S, Gerken NC, Mertens K, Klumpp S, Mozzanica A, Schmitt B, Wunderer C, Graafsma H, Meiwes-Broer KH, Wurth W, Martins M. Spectrometer for shot-to-shot photon energy characterization in the multi-bunch mode of the free electron laser at Hamburg. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2015; 86:113107. [PMID: 26628121 DOI: 10.1063/1.4936293] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The setup and first results from commissioning of a fast online photon energy spectrometer for the vacuum ultraviolet free electron laser at Hamburg (FLASH) at DESY are presented. With the use of the latest advances in detector development, the presented spectrometer reaches readout frequencies up to 1 MHz. In this paper, we demonstrate the ability to record online photon energy spectra on a shot-to-shot base in the multi-bunch mode of FLASH. Clearly resolved shifts in the mean wavelength over the pulse train as well as shot-to-shot wavelength fluctuations arising from the statistical nature of the photon generating self-amplified spontaneous emission process have been observed. In addition to an online tool for beam calibration and photon diagnostics, the spectrometer enables the determination and selection of spectral data taken with a transparent experiment up front over the photon energy of every shot. This leads to higher spectral resolutions without the loss of efficiency or photon flux by using single-bunch mode or monochromators.
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Trigg R, Rakhit C, Giblett S, Kelly M, Janus J, Martins M, Shaw J, Pritchard C. 425 Circulating-free DNA analysis in mouse models of early lung cancer. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)30259-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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98
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Martins M, Aymeric L, du Merle L, Danne C, Robbe-Masselot C, Trieu-Cuot P, Sansonetti P, Dramsi S. Streptococcus gallolyticusPil3 Pilus Is Required for Adhesion to Colonic Mucus and for Colonization of Mouse Distal Colon. J Infect Dis 2015; 212:1646-55. [DOI: 10.1093/infdis/jiv307] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Accepted: 05/13/2015] [Indexed: 12/24/2022] Open
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Roca I, Akova M, Baquero F, Carlet J, Cavaleri M, Coenen S, Cohen J, Findlay D, Gyssens I, Heuer OE, Kahlmeter G, Kruse H, Laxminarayan R, Liébana E, López-Cerero L, MacGowan A, Martins M, Rodríguez-Baño J, Rolain JM, Segovia C, Sigauque B, Tacconelli E, Wellington E, Vila J. The global threat of antimicrobial resistance: science for intervention. New Microbes New Infect 2015; 6:22-9. [PMID: 26029375 PMCID: PMC4446399 DOI: 10.1016/j.nmni.2015.02.007] [Citation(s) in RCA: 620] [Impact Index Per Article: 68.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Revised: 02/09/2015] [Accepted: 02/25/2015] [Indexed: 12/11/2022] Open
Abstract
In the last decade we have witnessed a dramatic increase in the proportion and absolute number of bacterial pathogens resistant to multiple antibacterial agents. Multidrug-resistant bacteria are currently considered as an emergent global disease and a major public health problem. The B-Debate meeting brought together renowned experts representing the main stakeholders (i.e. policy makers, public health authorities, regulatory agencies, pharmaceutical companies and the scientific community at large) to review the global threat of antibiotic resistance and come up with a coordinated set of strategies to fight antimicrobial resistance in a multifaceted approach. We summarize the views of the B-Debate participants regarding the current situation of antimicrobial resistance in animals and the food chain, within the community and the healthcare setting as well as the role of the environment and the development of novel diagnostic and therapeutic strategies, providing expert recommendations to tackle the global threat of antimicrobial resistance.
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Almeida MT, Mesquita FS, Cruz R, Osório H, Custódio R, Brito C, Vingadassalom D, Martins M, Leong JM, Holden DW, Cabanes D, Sousa S. Src-dependent tyrosine phosphorylation of non-muscle myosin heavy chain-IIA restricts Listeria monocytogenes cellular infection. J Biol Chem 2015; 290:8383-95. [PMID: 25635050 DOI: 10.1074/jbc.m114.591313] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Bacterial pathogens often interfere with host tyrosine phosphorylation cascades to control host responses and cause infection. Given the role of tyrosine phosphorylation events in different human infections and our previous results showing the activation of the tyrosine kinase Src upon incubation of cells with Listeria monocytogenes, we searched for novel host proteins undergoing tyrosine phosphorylation upon L. monocytogenes infection. We identify the heavy chain of the non-muscle myosin IIA (NMHC-IIA) as being phosphorylated in a specific tyrosine residue in response to L. monocytogenes infection. We characterize this novel post-translational modification event and show that, upon L. monocytogenes infection, Src phosphorylates NMHC-IIA in a previously uncharacterized tyrosine residue (Tyr-158) located in its motor domain near the ATP-binding site. In addition, we found that other intracellular and extracellular bacterial pathogens trigger NMHC-IIA tyrosine phosphorylation. We demonstrate that NMHC-IIA limits intracellular levels of L. monocytogenes, and this is dependent on the phosphorylation of Tyr-158. Our data suggest a novel mechanism of regulation of NMHC-IIA activity relying on the phosphorylation of Tyr-158 by Src.
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