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Silva AF, Torres MDT, Silva LS, Alves FL, Miranda A, Oliveira VX, de la Fuente-Nunez C, Pinheiro AAS. Synthetic angiotensin II peptide derivatives confer protection against cerebral and severe non-cerebral malaria in murine models. Sci Rep 2024; 14:4682. [PMID: 38409185 PMCID: PMC10897374 DOI: 10.1038/s41598-024-51267-5] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Accepted: 01/03/2024] [Indexed: 02/28/2024] Open
Abstract
Malaria can have severe long-term effects. Even after treatment with antimalarial drugs eliminates the parasite, survivors of cerebral malaria may suffer from irreversible brain damage, leading to cognitive deficits. Angiotensin II, a natural human peptide hormone that regulates blood pressure, has been shown to be active against Plasmodium spp., the etiologic agent of malaria. Here, we tested two Ang II derivatives that do not elicit vasoconstriction in mice: VIPF, a linear tetrapeptide, which constitutes part of the hydrophobic portion of Ang II; and Ang II-SS, a disulfide-bridged derivative. The antiplasmodial potential of both peptides was evaluated with two mouse models: an experimental cerebral malaria model and a mouse model of non-cerebral malaria. The latter consisted of BALB/c mice infected with Plasmodium berghei ANKA. The peptides had no effect on mean blood pressure and significantly reduced parasitemia in both mouse models. Both peptides reduced the SHIRPA score, an assay used to assess murine health and behavior. However, only the constrained derivative (Ang II-SS), which was also resistant to proteolytic degradation, significantly increased mouse survival. Here, we show that synthetic peptides derived from Ang II are capable of conferring protection against severe manifestations of malaria in mouse models while overcoming the vasoconstrictive side effects of the parent peptide.
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Affiliation(s)
- Adriana F Silva
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Santo André, SP, Brazil
- Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Marcelo D T Torres
- Machine Biology Group, Departments of Psychiatry and Microbiology, Institute for Biomedical Informatics, Institute for Translational Medicine and Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
- Departments of Bioengineering and Chemical and Biomolecular Engineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, PA, USA
- Department of Chemistry, School of Arts and Sciences, University of Pennsylvania, Philadelphia, PA, USA
- Penn Institute for Computational Science, University of Pennsylvania, Philadelphia, PA, USA
| | - Leandro S Silva
- Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Flavio L Alves
- Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
- Faculdade de Ciências Médicas da Santa Casa de São Paulo, São Paulo, SP, Brazil
| | - Antonio Miranda
- Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Vani X Oliveira
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Santo André, SP, Brazil
- Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Cesar de la Fuente-Nunez
- Machine Biology Group, Departments of Psychiatry and Microbiology, Institute for Biomedical Informatics, Institute for Translational Medicine and Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
- Departments of Bioengineering and Chemical and Biomolecular Engineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, PA, USA.
- Department of Chemistry, School of Arts and Sciences, University of Pennsylvania, Philadelphia, PA, USA.
- Penn Institute for Computational Science, University of Pennsylvania, Philadelphia, PA, USA.
| | - Ana Acacia S Pinheiro
- Instituto de Biofísica Carlos Chagas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
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Sellier P, Vidal P, Bertin B, Gicquel E, Bertil-Froidevaux E, Georger C, van Wittenberghe L, Miranda A, Daniele N, Richard I, Gross DA, Mingozzi F, Collaud F, Ronzitti G. Muscle-specific, liver-detargeted adeno-associated virus gene therapy rescues Pompe phenotype in adult and neonate Gaa -/- mice. J Inherit Metab Dis 2024; 47:119-134. [PMID: 37204237 DOI: 10.1002/jimd.12625] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 03/17/2023] [Accepted: 05/11/2023] [Indexed: 05/20/2023]
Abstract
Pompe disease (PD) is a neuromuscular disorder caused by acid α-glucosidase (GAA) deficiency. Reduced GAA activity leads to pathological glycogen accumulation in cardiac and skeletal muscles responsible for severe heart impairment, respiratory defects, and muscle weakness. Enzyme replacement therapy with recombinant human GAA (rhGAA) is the standard-of-care treatment for PD, however, its efficacy is limited due to poor uptake in muscle and the development of an immune response. Multiple clinical trials are ongoing in PD with adeno-associated virus (AAV) vectors based on liver- and muscle-targeting. Current gene therapy approaches are limited by liver proliferation, poor muscle targeting, and the potential immune response to the hGAA transgene. To generate a treatment tailored to infantile-onset PD, we took advantage of a novel AAV capsid able to increase skeletal muscle targeting compared to AAV9 while reducing liver overload. When combined with a liver-muscle tandem promoter (LiMP), and despite the extensive liver-detargeting, this vector had a limited immune response to the hGAA transgene. This combination of capsid and promoter with improved muscle expression and specificity allowed for glycogen clearance in cardiac and skeletal muscles of Gaa-/- adult mice. In neonate Gaa-/- , complete rescue of glycogen content and muscle strength was observed 6 months after AAV vector injection. Our work highlights the importance of residual liver expression to control the immune response toward a potentially immunogenic transgene expressed in muscle. In conclusion, the demonstration of the efficacy of a muscle-specific AAV capsid-promoter combination for the full rescue of PD manifestation in both neonate and adult Gaa-/- provides a potential therapeutic avenue for the infantile-onset form of this devastating disease.
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Affiliation(s)
- P Sellier
- Université Paris-Saclay, Univ Evry, Inserm, Genethon, Integrare Research Unit UMR_S951, Evry, France
- Genethon, Evry, France
| | - P Vidal
- Université Paris-Saclay, Univ Evry, Inserm, Genethon, Integrare Research Unit UMR_S951, Evry, France
- Genethon, Evry, France
| | - B Bertin
- Université Paris-Saclay, Univ Evry, Inserm, Genethon, Integrare Research Unit UMR_S951, Evry, France
- Genethon, Evry, France
| | - E Gicquel
- Université Paris-Saclay, Univ Evry, Inserm, Genethon, Integrare Research Unit UMR_S951, Evry, France
- Genethon, Evry, France
| | | | | | | | | | | | - I Richard
- Université Paris-Saclay, Univ Evry, Inserm, Genethon, Integrare Research Unit UMR_S951, Evry, France
- Genethon, Evry, France
| | - D A Gross
- Université Paris-Saclay, Univ Evry, Inserm, Genethon, Integrare Research Unit UMR_S951, Evry, France
- Genethon, Evry, France
| | - F Mingozzi
- Université Paris-Saclay, Univ Evry, Inserm, Genethon, Integrare Research Unit UMR_S951, Evry, France
- Genethon, Evry, France
| | - F Collaud
- Université Paris-Saclay, Univ Evry, Inserm, Genethon, Integrare Research Unit UMR_S951, Evry, France
- Genethon, Evry, France
| | - G Ronzitti
- Université Paris-Saclay, Univ Evry, Inserm, Genethon, Integrare Research Unit UMR_S951, Evry, France
- Genethon, Evry, France
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Gómez-González S, Miranda A, Hoyos-Santillan J, Lara A, Moraga P, Pausas JG. Afforestation and climate mitigation: lessons from Chile. Trends Ecol Evol 2024; 39:5-8. [PMID: 37891076 DOI: 10.1016/j.tree.2023.09.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 09/13/2023] [Accepted: 09/22/2023] [Indexed: 10/29/2023]
Abstract
The Chilean Climate Change Law excludes tree monocultures as a solution to the climate crisis, offering an opportunity for resilience and climate mitigation in Latin America. The Chilean experience with mega-fires in extensive, homogeneous forest plantations provides important lessons that could inform climate policies in other countries.
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Affiliation(s)
- S Gómez-González
- Departamento de Biología-IVAGRO, Universidad de Cádiz, Puerto Real, 11510, Spain; Center for Climate and Resilience Research (CR)(2), Santiago, 8370448, Chile; Center for Fire and Socioecological Systems (FireSES), Universidad Austral de Chile, Valdivia, 5110566, Chile.
| | - A Miranda
- Center for Climate and Resilience Research (CR)(2), Santiago, 8370448, Chile; Center for Fire and Socioecological Systems (FireSES), Universidad Austral de Chile, Valdivia, 5110566, Chile; Laboratorio de Ecología del Paisaje y Conservación, Departamento de Ciencias Forestales, Universidad de La Frontera, Temuco, 4811230, Chile
| | - J Hoyos-Santillan
- Center for Climate and Resilience Research (CR)(2), Santiago, 8370448, Chile; Environmental Biogeochemistry Laboratory, GAIA Antarctic Research Centre, Universidad de Magallanes, Punta Arenas, 6200000, Chile; School of Biosciences, University of Nottingham, Sutton Bonington, Loughborough, LE12 5RD, UK; Smithsonian Tropical Research Institute, Ancón, 0843-03092, Panamá
| | - A Lara
- Center for Climate and Resilience Research (CR)(2), Santiago, 8370448, Chile; Center for Fire and Socioecological Systems (FireSES), Universidad Austral de Chile, Valdivia, 5110566, Chile; Laboratorio de Dendrocronología y Cambio Global, Instituto de Conservación, Biodiversidad y Territorio, Facultad de Ciencias Forestales y Recursos Naturales, Universidad Austral de Chile, Valdivia, 5090000, Chile; Fundación Centro de los Bosques Nativos (FORECOS), Isla Teja, Valdivia, 5110206, Chile
| | - P Moraga
- Center for Climate and Resilience Research (CR)(2), Santiago, 8370448, Chile; Centro de Derecho Ambiental, Universidad de Chile, Santiago, 6640022, Chile
| | - J G Pausas
- Center for Fire and Socioecological Systems (FireSES), Universidad Austral de Chile, Valdivia, 5110566, Chile; Centro de Investigaciones sobre Desertificación (CIDE-CSIC), Valencia, 46113, Spain
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Reichart D, Lindberg EL, Maatz H, Miranda A, Viveiros A, Shvetsov N, Lee M, Kanemaru K, Milting H, Noseda M, Oudit G, Heinig M, Seidman JG, Huebner N, Seidman CE. Pathogenic variants damage cell compositions and single cell transcription in cardiomyopathies. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.2992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Pathogenic variants in genes that cause dilated (DCM) and arrhythmogenic cardiomyopathies (ACM) convey high risks for the development of heart failure (HF) through unknown mechanisms. Using single nucleus RNA sequencing (snRNAseq), we characterized the transcriptome of 880,000 nuclei from 18 control and 61 failing, non-ischemic human hearts with pathogenic variants in DCM and ACM genes or idiopathic disease. We performed genotype-stratified analyses of the ventricular cell lineages and transcriptional states. The resultant DCM and ACM ventricular cell atlas demonstrated distinct right and left ventricular responses, highlighting genotype-associated pathways, intercellular interactions, and differential gene expression at single cell resolution. Together these data illuminate both shared and distinct cellular and molecular architectures of human HF and suggest novel candidate therapeutic targets.
Funding Acknowledgement
Type of funding sources: Other. Main funding source(s): Chan Zuckerberg FoundationLeducq Foundation
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Affiliation(s)
- D Reichart
- Harvard Medical School , Boston , United States of America
| | - E L Lindberg
- Max Delbruck Center for Molecular Medicine , Berlin , Germany
| | - H Maatz
- Max Delbruck Center for Molecular Medicine , Berlin , Germany
| | - A Miranda
- Imperial College London , London , United Kingdom
| | - A Viveiros
- Mazankowski Alberta Heart Institute , Edmonton , Canada
| | - N Shvetsov
- Max Delbruck Center for Molecular Medicine , Berlin , Germany
| | - M Lee
- Imperial College London , London , United Kingdom
| | - K Kanemaru
- Wellcome Trust Sanger Institute , Hinxton , United Kingdom
| | - H Milting
- Herz- und Diabeteszentrum NRW, Ruhr-Universitaet Bochum , Bad Oeynhausen , Germany
| | - M Noseda
- Imperial College London , London , United Kingdom
| | - G Oudit
- Mazankowski Alberta Heart Institute , Edmonton , Canada
| | - M Heinig
- Helmholtz Center Munich , Neuherberg , Germany
| | - J G Seidman
- Harvard Medical School , Boston , United States of America
| | - N Huebner
- Max Delbruck Center for Molecular Medicine , Berlin , Germany
| | - C E Seidman
- Harvard Medical School , Boston , United States of America
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Biglia A, Dourado E, Palterer B, Parronchi P, Pellico MR, Zanframundo G, Rivera Matias PA, Martins P, Miranda A, Cabral Da Fonseca JE, DI Agosta E, Cammelli D, Emmi G, Rosi E, Bixio R, Conticini E, Bellis E, Bruni C, Montecucco C, Matucci-Cerinic M, Rojas-Serrano J, Cavagna L. POS0863 ANTI-NOR90 ANTIBODIES IN THE SETTING OF CONNECTIVE TISSUE DISEASE: CLINICAL SIGNIFICANCE AND COMPARISON WITH A COHORT OF PATIENTS WITH SYSTEMIC SCLEROSIS. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.1636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BackgroundAnti-NOR90 antibodies are directed against a 90-kD nucleolar protein located in the nucleolus organizing regions (NORs), mainly described in systemic sclerosis (SSc) [1, 2, 3] but reported also in other rheumatologic and oncologic diseases [4, 5, 6]. The clinical correlates of anti-NOR90 antibodies are still to be defined because the cohorts described thus far include a low number of patients.ObjectivesTo describe the characteristics of a large cohort of anti-NOR90 antibodies positive patients and compare them with a matched cohort of SSc patients negative for anti-NOR90 antibodies.MethodsA retrospective analysis was performed on patients positive for anti-NOR90 antibodies referring to participating centres. The concomitant positivity for anti-RNA polymerase III, Th/To, PM-Scl, Ku, and PDGFR antibodies was an exclusion criterion. In all cases the diagnoses, the different organ involvement and related clinical, instrumental and laboratory characteristics were evaluated. The EUROLINE SystemicSclerosisProfile kit from Euroimmun (Lübeck, Germany) was used to detect anti-NOR90 antibodies.ResultsWe included 101 patients positive for anti-NOR90 (M/F=13/88, mean age 52.5 years). They were mainly classified as SSc (n=38), undifferentiated connective tissue disease (UCTD) (n=21), interstitial pneumonia with autoimmune features (IPAF) (n=11) (graph 1). The most frequent clinical manifestations were arthralgias (n=72), Raynaud’s phenomenon (RP) (n=58), sicca syndrome (n=49), ILD (n=40), puffy fingers (n=32), arthritis (n=30), and limited skin sclerosis (n=24). Anti-NOR90 antibodies were associated with anti-Ro52 antibodies in the 16% of cases, with anticentromere antibodies in the 7% of cases, and with anti-Scl70 in the 5% of cases. After excluding these patients, and considering the isolated anti-NOR90 positivity, 12 patients had SSc, 35 UCTD, and 11 IPAF. The most frequent clinical manifestations were arthralgias (n=40), RP (n=37), and sicca syndrome (n=21). Compared to 242 matched SSc without anti-NOR90 antibodies, patients with anti-NOR90 had more frequently joint manifestations and sicca syndrome and less frequently all vasculopathic manifestations (RP, telangiectasias, pitting scars, acral ulcers), dysphagia and fibromyalgia.ConclusionOur study shows that anti-NOR90 antibodies are more commonly observed in females, and clinically associated with the occurrence of arthritis/arthralgias, sicca syndrome and RP. In more than the 50% of cases they may be found with other autoantibodies, such as the anti-Ro52, the anticentromere, and the anti-Scl70 antibodies. Anti-NOR90 seems to play an accompanying role in the context of CTDs, without strong influence on the clinical phenotype expression of the underlying CTD.References[1]Rodriguez-Sanchez et al., Anti-NOR 90. A new autoantibody in scleroderma that recognizes a 90-kDa component of the nucleolus-organizing region of chromatin, 1987.[2]Hamaguchi et al., Clinical and immunologic predictors of scleroderma renal crisis in Japanese systemic sclerosis patients with anti-RNA polymerase III autoantibodies, 2015.[3]Liaskos et al., Disease-related autoantibody profile in patients with systemic sclerosis, 2017.[4]Imai et al., Immunocytochemical characterization of human NOR-90 (upstream binding factor) and associated antigens reactive with autoimmune sera. Two MR forms of NOR-90/hUBF autoantigens, 1994.[5]Fujii et al., Detection of autoantibodies to nucleolar transcription factor NOR 90/hUBF in sera of patients with rheumatic diseases, by recombinant autoantigen-based assays, 1996.[6]Yamashita et al., Clinical significance of anti-NOR90 antibodies in systemic sclerosis and idiopathic interstitial pneumonia, 2021.Figure 1.Disclosure of InterestsNone declared
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Navarro Aznar V, Campos Bonel A, Escuín Troncho C, Miranda A, Cerrolaza Pascual M, Lanuza Carnicer A, Flamarique Andueza S, Rubio P, Alba Villalba V, Casamayor Franco M, Ibáñez Carreras R. PO-1203 Targeted Intraoperative Radiotherapy Tumour Bed Boost: Our experience. Radiother Oncol 2022. [DOI: 10.1016/s0167-8140(22)03167-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: 10/18/2022]
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Cerrolaza M, Mendez A, Miranda A, Navarro V, Escuin C, Campos A, Flamarique S, Gascon M, Lozares S, Ibañez R. PO-1339 Long- term outcomes after electronic brachytherapy in the adjuvant treatment of endometrial cancer. Radiother Oncol 2022. [DOI: 10.1016/s0167-8140(22)03303-5] [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: 11/26/2022]
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Pinto EM, Neves JR, Teixeira A, Frada R, Atilano P, Oliveira F, Veigas T, Miranda A. Efficacy of Hounsfield Units Measured by Lumbar Computer Tomography on Bone Density Assessment: A Systematic Review. Spine (Phila Pa 1976) 2022; 47:702-710. [PMID: 34468433 DOI: 10.1097/brs.0000000000004211] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
STUDY DESIGN Systematic review. OBJECTIVE This work aimed to compare the Hounsfield units (HU) value obtained from computed tomography and the t score of dual-energy x-ray absorptiometry (DXA) in the prediction of the lumbar spine bone mineral density (BMD). SUMMARY OF BACKGROUND DATA Several reports have found a correlation between HU and BMD values based on DXA. Using HUs to infer bone quality has a thorough clinical relevance as it could triage patients at risk for osteoporotic and fragility fractures or modify surgical indications. METHODS A systematic review in Cochrane Library, Medline, Scopus and Web of Science was performed, using the following query: "hounsfield units" AND ("osteoporosis" OR "spine" OR "bone mineral density" OR "dual x-ray absorptiometry"). We included 18 cohort studies that compared HU value obtained from computed tomography and t score of DXA for predicting regional BMD. RESULTS A total of 18 studies were included, enrolling 5307 patients. The HU measurement was most frequently made at L1 (N = 3; 18.8%). The mean HU values differentiated based on BMD measured through DXA were reported in seven studies, with values from 54.7 to 130 for osteoporotic, 78.8 to 146 for osteopenic, and from 120.8 to 230 in normal patients. Eight studies identified thresholds for diagnosing osteoporosis through receiver-operating characteristic (ROC) curves, with values ranging from 0.66 to 0.96. Medium HU values reported as diagnostic of osteoporosis ranged between 110 and 150, after exclusion of the two papers presenting outlier values. We infer an HU interval value of 90.9 to 138.7 (95% CI, P < 0.001) for the diagnosis osteoporosis. CONCLUSIONS Present data evidence favorable results regarding the possibility of establishing a threshold value for osteoporosis diagnosis from CT measurements of HU. Prospective large-scale studies are needed to more robustly infer the possibility of quantifying BMD based on CT as a screening test and infer a prognostic value of the CT-based evaluation.Level of Evidence: 2.
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Affiliation(s)
- Eduardo Moreira Pinto
- Orthopedic and Traumatology Surgery, Spine Division, Entre Douro e Vouga Hospital Center, S.M.Feira, Portugal
| | - Joao Rocha Neves
- Consultant of Angiology and Vascular Surgery at Centro Hospitalar São João, Porto, Portugal;Biomedicine Department-Unit of Anatomy, Faculty of Medicine, University of Porto, Portugal
| | - Artur Teixeira
- Orthopedic and Traumatology Surgery, Spine Division, Entre Douro e Vouga Hospital Center, S.M.Feira, Portugal
| | - Ricardo Frada
- Orthopedic and Traumatology Surgery, Spine Division, Entre Douro e Vouga Hospital Center, S.M.Feira, Portugal
| | - Pedro Atilano
- Orthopedic and Traumatology Surgery, Spine Division, Entre Douro e Vouga Hospital Center, S.M.Feira, Portugal
| | - Filipa Oliveira
- Orthopedic and Traumatology Surgery, Spine Division, Entre Douro e Vouga Hospital Center, S.M.Feira, Portugal
| | - Tania Veigas
- Orthopedic and Traumatology Surgery, Spine Division, Entre Douro e Vouga Hospital Center, S.M.Feira, Portugal
| | - Antonio Miranda
- Orthopedic and Traumatology Surgery, Spine Division, Entre Douro e Vouga Hospital Center, S.M.Feira, Portugal
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Miranda A, Shield PW, Williams V, Starkey D, Kelly MA. Training undergraduate students for rapid on-site evaluation of fine needle aspiration cytology samples using a simulation based education activity. Cytopathology 2021; 33:321-327. [PMID: 34932830 DOI: 10.1111/cyt.13092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 11/23/2021] [Accepted: 12/17/2021] [Indexed: 12/01/2022]
Abstract
INTRODUCTION Demand for rapid onsite evaluation (ROSE) of fine needle aspiration (FNA) cytology is rising and the role is increasingly being performed by non-medical cytologists. Undergraduate training for cytologists has traditionally focused on laboratory-based procedural activities and their theoretical underpinning, with minimal attention given to communication and other skills required to operate in an interprofessional setting. We evaluated the effectiveness and student reaction to a simulation-based education (SBE) exercise in ROSE designed to fill this void. METHODS We designed and evaluated a SBE exercise based on FNA ROSE across two tertiary institutions with 79 students. The exercise accurately reproduced the demands on cytologists operating as part of a multi-disciplinary team in a time- pressured environment. FINDINGS Pre- and post-simulation questionnaires indicated an improvement in technical knowledge related to the procedure. Students' perception of their competence and confidence in their role also improved significantly post simulation. Students uniformly found the exercise engaging and a valuable addition to their curriculum. DISCUSSION The simulation successfully provided a pseudo-clinical environment that highlighted the realities of practising technical and diagnostic tasks under time- pressure and interacting with other health professionals to provide an optimal patient outcome. The exercise is useful supplement to on-the-job training for ROSE.
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Affiliation(s)
- A Miranda
- Curtin Medical School, Curtin University, Perth, Western Australia, Australia
| | - P W Shield
- School of Biomedical Sciences, Faculty of Health, Queensland University of Technology, Brisbane, Australia.,Sullivan Nicolaides Pathology, Brisbane, Australia
| | - V Williams
- Curtin Medical School, Curtin University, Perth, Western Australia, Australia
| | - D Starkey
- School of Clinical Sciences, Faculty of Health, Queensland University of Technology, Brisbane, Australia
| | - M A Kelly
- Curtin School of Nursing, Curtin University, Perth, Western Australia, Australia
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Cedillo RE, Cortes BE, Herrera MC, Valadez NH, Pimentel FL, Malfatti E, Hernandez A, Cedeño A, Vargas B, Miranda A, Olamendi N. CONGENITAL MYOPATHIES. Neuromuscul Disord 2021. [DOI: 10.1016/j.nmd.2021.07.069] [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: 10/20/2022]
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Lillo A, Carvajal-Caiconte F, Vital W, Silva Junior PI, Paredes-Gamero EJ, Alvear M, Miranda A. Bioactive properties of Persea lingue Ness (Lauraceae) fruit and leaf extracts. BRAZ J BIOL 2021; 83:e248063. [PMID: 34495162 DOI: 10.1590/1519-6984.248063] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 05/15/2021] [Indexed: 11/21/2022] Open
Abstract
Persea lingue Ness is a tree species that lives mainly in temperate forests of south-central Chile. Its leaves are used in ethnomedicine, the fruit is a drupe similar to that of the avocado and has not been studied. The aim of this study was to determine the cytotoxicity in leukemia cell and antibacterial activity, along with some chemical content characteristics of P. lingue fruit and leaf extracts. The antibacterial activity was determined by the inhibition of bacterial growth in liquid medium assay against Gram-positive and Gram-negative bacteria. The leukemia cell lines Kasumi-1 and Jurkat were used to evaluate the cytotoxic activity by using propidium iodide and AlamarBlue assays. Total phenolic, flavonoid, condensed tannin, alkaloid and lipid contents were evaluated in the fruit and in the leaf extracts. The antioxidant activity of both extracts were also elavaluated. Leaf extract presented the highest content of total phenols, condensed tannins and flavonoids, and also the highest antioxidant activity. While the fruit extract has a higher amount of lipids and alkaloids and the high antibacterial activity against Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, Bacillus megaterium and Micrococcus luteus. The leaf extract only showed activity against M. luteus. Concerning the cytotoxic activity, only the fruit extract showed cytotoxicity against the cell lines Jurkat and Kasumi-1. P. lingue fruit extract is a potential source of biologically active molecules for the development of new drugs to be used in some types of leukemia, as well as antibacterial agent.
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Affiliation(s)
- A Lillo
- Universidade Federal de São Paulo - UNIFESP, Departamento de Ciência e Tecnologia, São José Dos Campos, SP, Brasil
| | - F Carvajal-Caiconte
- Universidad de La Frontera, Departamento de Ciencias Químicas y Recursos Naturales, Temuco, Chile
| | - W Vital
- Universidade Federal de São Paulo - UNIFESP, Departamento de Biologia Química, Diadema, SP, Brasil
| | - P I Silva Junior
- Instituto Butantan, Centro de Toxinas, Resposta Imune e Sinalização Celular - CeTICS, Centro de Pesquisa, Inovação e Difusão - CEPID, Laboratório de Toxinologia Aplicada - LETA, São Paulo, SP, Brasil
| | - E J Paredes-Gamero
- Universidade Federal de Mato Grosso do Sul - UFMS, Faculdade de Ciências Farmacêuticas, Alimentos e Nutrição, Campo Grande, MS, Brasil
| | - M Alvear
- Universidad de La Frontera, Departamento de Ciencias Químicas y Recursos Naturales, Temuco, Chile
| | - A Miranda
- Universidade Federal de São Paulo - UNIFESP, Departamento de Biofísica, São Paulo, SP, Brasil
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Dick IM, Lee YCG, Cheah HM, Miranda A, Robinson BWS, Creaney J. Profile of soluble factors in pleural effusions predict prognosis in mesothelioma. Cancer Biomark 2021; 33:159-169. [PMID: 34487023 PMCID: PMC8925107 DOI: 10.3233/cbm-210280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
BACKGROUND: Pleural mesothelioma is a deadly asbestos induced cancer. Less than 10% of mesothelioma patients survive 5 years post diagnosis. However survival can range from a few months to a number of years. Accurate prediction of survival is important for patients to plan for their remaining life, and for clinicians to determine appropriate therapy. One unusual feature of mesothelioma is that patients frequently present with tumor-associated pleural effusions early in the course of the disease. OBJECTIVE: To study whether cells and molecules present in pleural effusions provide prognostic information for mesothelioma. METHODS: We profiled the cellular constituents and concentrations of 40 cytokines, chemokines and cellular factors (collectively “soluble factors”) involved in inflammatory and immune signalling pathways in pleural effusion samples from 50 mesothelioma patients. Associations with survival were evaluated by Cox proportional hazards regression methods. Results for the two soluble factors most significantly and independently associated with survival were validated in an independent set of samples (n= 51) using a separate assay system. RESULTS: Survival analysis revealed that IL8, IL2Ra (CD25) and PF4 were independent determinants of a more negative prognosis in mesothelioma patients, independent of other known prognostic factors. Lipocalin2 and IL4 were associated with better prognosis. CONCLUSIONS: This study demonstrates that pleural effusions rich in a range of soluble factors are associated with poor prognosis. These findings will enhance our ability to prognosticate outcomes in mesothelioma patients.
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Affiliation(s)
- I M Dick
- National Centre for Asbestos Related Disease, University of Western Australia, Nedlands, WA, Australia.,Faculty of Health and Medical Science, University of Western Australia, Nedlands, WA, Australia.,Institute of Respiratory Health, University of Western Australia, Nedlands, WA, Australia
| | - Y C G Lee
- Faculty of Health and Medical Science, University of Western Australia, Nedlands, WA, Australia.,Institute of Respiratory Health, University of Western Australia, Nedlands, WA, Australia.,Department of Respiratory Medicine, Sir Charles Gairdner Hospital, Nedlands, WA, Australia
| | - H M Cheah
- Institute of Respiratory Health, University of Western Australia, Nedlands, WA, Australia
| | - A Miranda
- National Centre for Asbestos Related Disease, University of Western Australia, Nedlands, WA, Australia
| | - B W S Robinson
- National Centre for Asbestos Related Disease, University of Western Australia, Nedlands, WA, Australia.,Faculty of Health and Medical Science, University of Western Australia, Nedlands, WA, Australia.,Department of Respiratory Medicine, Sir Charles Gairdner Hospital, Nedlands, WA, Australia
| | - J Creaney
- National Centre for Asbestos Related Disease, University of Western Australia, Nedlands, WA, Australia.,Faculty of Health and Medical Science, University of Western Australia, Nedlands, WA, Australia.,Institute of Respiratory Health, University of Western Australia, Nedlands, WA, Australia
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Buri MV, Sperandio LP, de Souza KFS, Antunes F, Rezende MM, Melo CM, Pinhal MAS, Barros CC, Fernig DG, Yates EA, Ide JS, Smaili SS, Riske KA, Nader HB, Luis Dos Santos Tersariol I, Lima MA, Judice WAS, Miranda A, Paredes-Gamero EJ. Endocytosis and the Participation of Glycosaminoglycans Are Important to the Mechanism of Cell Death Induced by β-Hairpin Antimicrobial Peptides. ACS Appl Bio Mater 2021; 4:6488-6501. [PMID: 35006908 DOI: 10.1021/acsabm.1c00390] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The cytotoxic mode of action of four antimicrobial peptides (AMPs) (gomesin, tachyplesin, protegrin, and polyphemusin) against a HeLa cell tumor model is discussed. A study of cell death by AMP stimulation revealed some similarities, including annexin-V externalization, reduction of mitochondrial potential, insensitivity against inhibitors of cell death, and membrane permeabilization. Evaluation of signaling proteins and gene expression that control cell death revealed wide variation in the responses to AMPs. However, the ability to cross cell membranes emerged as an important characteristic of AMP-dependent cell death, where endocytosis mediated by dynamin is a common mechanism. Furthermore, the affinity between AMPs and glycosaminoglycans (GAGs) and GAG participation in the cytotoxicity of AMPs were verified. The results show that, despite their primary and secondary structure homology, these peptides present different modes of action, but endocytosis and GAG participation are an important and common mechanism of cytotoxicity for β-hairpin peptides.
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Affiliation(s)
- Marcus Vinicius Buri
- Departamento de Bioquímica, Universidade Federal de São Paulo, R. Três de Maio 100, São Paulo 04044-020, São Paulo, Brazil
| | - Letícia Paulino Sperandio
- Centro Interdisciplinar de Investigação Bioquímica, Universidade de Mogi Das Cruzes, Av. Dr. Cândido Xavier de Almeida Souza, 200, Mogi Das Cruzes 08780-911, São Paulo, Brazil.,Departamento de Farmacologia, Universidade Federal de São Paulo, R. Três de Maio 100, São Paulo 04044-020, São Paulo, Brazil
| | - Kamylla F S de Souza
- Departamento de Bioquímica, Universidade Federal de São Paulo, R. Três de Maio 100, São Paulo 04044-020, São Paulo, Brazil
| | - Fernanda Antunes
- Departamento de Farmacologia, Universidade Federal de São Paulo, R. Três de Maio 100, São Paulo 04044-020, São Paulo, Brazil
| | - Marina Mastelaro Rezende
- Departamento de Bioquímica, Universidade Federal de São Paulo, R. Três de Maio 100, São Paulo 04044-020, São Paulo, Brazil
| | - Carina Mucciolo Melo
- Departamento de Bioquímica, Universidade Federal de São Paulo, R. Três de Maio 100, São Paulo 04044-020, São Paulo, Brazil
| | - Maria A S Pinhal
- Departamento de Bioquímica, Universidade Federal de São Paulo, R. Três de Maio 100, São Paulo 04044-020, São Paulo, Brazil.,Departmento de Bioquímica, Faculdade de Medicina Do ABC, Santo André 09060-870, Brazil
| | - Carlos C Barros
- Departamento de Nutrição, Universidade Federal de Pelotas, R. Gomes Carneiro, No1, Pelotas 96010-610, Rio Grande do Sul, Brazil
| | - David G Fernig
- Department of Biochemistry and Systems Biology, ISMIB, University of Liverpool, Liverpool L69 7ZB, U.K
| | - Edwin A Yates
- Departamento de Bioquímica, Universidade Federal de São Paulo, R. Três de Maio 100, São Paulo 04044-020, São Paulo, Brazil.,Department of Biochemistry and Systems Biology, ISMIB, University of Liverpool, Liverpool L69 7ZB, U.K
| | - Jaime S Ide
- Department of Psychiatry, Yale University School of Medicine, New Haven, Connecticut 06519, United States
| | - Soraya S Smaili
- Departamento de Farmacologia, Universidade Federal de São Paulo, R. Três de Maio 100, São Paulo 04044-020, São Paulo, Brazil
| | - Karin A Riske
- Departamento de Biofísica, Universidade Federal de São Paulo, R. Três de Maio 100, São Paulo 04044-020, São Paulo, Brazil
| | - Helena B Nader
- Departamento de Bioquímica, Universidade Federal de São Paulo, R. Três de Maio 100, São Paulo 04044-020, São Paulo, Brazil
| | | | - Marcelo Andrade Lima
- Departamento de Bioquímica, Universidade Federal de São Paulo, R. Três de Maio 100, São Paulo 04044-020, São Paulo, Brazil
| | - Wagner A S Judice
- Centro Interdisciplinar de Investigação Bioquímica, Universidade de Mogi Das Cruzes, Av. Dr. Cândido Xavier de Almeida Souza, 200, Mogi Das Cruzes 08780-911, São Paulo, Brazil
| | - Antonio Miranda
- Departamento de Biofísica, Universidade Federal de São Paulo, R. Três de Maio 100, São Paulo 04044-020, São Paulo, Brazil
| | - Edgar J Paredes-Gamero
- Departamento de Bioquímica, Universidade Federal de São Paulo, R. Três de Maio 100, São Paulo 04044-020, São Paulo, Brazil.,Faculdade de Ciências Farmacêuticas, Alimentos e Nutrição, Universidade Federal de Mato Grosso Do Sul, Campo Grande 79070-900, Mato Grosso do Sul, Brazil
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Miranda A, Gravina AG, Cuomo A, Mucherino C, Sgambato D, Facchiano A, Granata L, Priadko K, Pellegrino R, de Filippo FR, Camera S, Cuomo R, Melina R, D'Onofrio V, Manguso F, Ciacci C, Romano M. Efficacy of ustekinumab in the treatment of patients with Crohn's disease with failure to previous conventional or biologic therapy: a prospective observational real-life study. J Physiol Pharmacol 2021; 72. [PMID: 34987127 DOI: 10.26402/jpp.2021.4.05] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Accepted: 08/30/2021] [Indexed: 12/08/2022]
Abstract
Ustekinumab (UST), a human anti-IL12/23p40 monoclonal antibody, was approved by FDA and EMA for the treatment of moderate to severe Crohn's disease (CD). Whether UST is effective in inducing deep remission, including mucosal healing and transmural healing, in patients with CD in a real life setting is not completely clear. This study was performed on 92 subjects with confirmed diagnosis of moderate to severe Crohn's disease and no neoplasia. Before inclusion, all patients had been exposed and had failed to respond to conventional and/or at least one biological therapy. All patients underwent endoscopic examination and bowel MRI and ultrasonography at baseline (T0). At week 52 (T52), patients underwent colonoscopy for assessment of mucosal healing and MRI or ultrasonography for assessment of transmural healing. CDAI was used for the assessment of clinical response and clinical remission. SES-CD was used to assess endoscopic response and remission. Incidence of treatment-related adverse events (TRAEs) was recorded during the study period. Clinical response at week 52 was achieved in 38 (50.5%) patients and clinical remission in 29 (39%). Twenty-six (34%) patients showed mucosal healing, 34 (45%) showed partial endoscopic response. We observed a reduction in SES-CD of at least 50% in 34 (45%) patients as well as an SES-CD ≤ 2 in 26 (35%) patients. All patients with mucosal healing also showed transmural healing. No major TRAEs were observed during treatment. In this multicenter, real life study, we show that UST was well tolerated and effective in inducing clinical response and clinical remission in patients with moderate to severe CD who had previously failed to respond to conventional or biologic therapy. UST showed limited efficacy in inducing deep remission (i.e. mucosal+transmural healing).
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Affiliation(s)
- A Miranda
- Hepatogastroenterology Division, Department of Precision Medicine, University of Campania Luigi Vanvitelli, Naples, Italy
| | - A G Gravina
- Hepatogastroenterology Division, Department of Precision Medicine, University of Campania Luigi Vanvitelli, Naples, Italy
| | - A Cuomo
- Gastroenterology Unit "Umberto I" Hospital, Nocera Inferiore, Salerno, Italy
| | - C Mucherino
- Gastroenterology and Endoscopy Unit, S. Anna-S. Sebastiano Hospital, Caserta, Italy
| | - D Sgambato
- Department of Gastroenterology, S. G. Moscati Hospital, Avellino, Italy
| | - A Facchiano
- Hepatogastroenterology Division, Department of Precision Medicine, University of Campania Luigi Vanvitelli, Naples, Italy
| | - L Granata
- Hepatogastroenterology Division, Department of Precision Medicine, University of Campania Luigi Vanvitelli, Naples, Italy
| | - K Priadko
- Hepatogastroenterology Division, Department of Precision Medicine, University of Campania Luigi Vanvitelli, Naples, Italy
| | - R Pellegrino
- Hepatogastroenterology Division, Department of Precision Medicine, University of Campania Luigi Vanvitelli, Naples, Italy
| | - F R de Filippo
- Gastroenterology Unit, Department of Medicine and Surgery, Scuola Medica Salernitana, University of Salerno, Salerno, Italy
| | - S Camera
- Gastroenterology Unit "Umberto I" Hospital, Nocera Inferiore, Salerno, Italy
| | - R Cuomo
- Department of Gastroenterology, S. G. Moscati Hospital, Avellino, Italy
| | - R Melina
- Department of Gastroenterology, S. G. Moscati Hospital, Avellino, Italy
| | - V D'Onofrio
- Department of Gastroenterology, S. G. Moscati Hospital, Avellino, Italy
| | - F Manguso
- Complex Operating Unit of Gastroenterology, AORN 'A. Cardarelli', Naples, Italy
| | - C Ciacci
- Gastroenterology Unit, Department of Medicine and Surgery, Scuola Medica Salernitana, University of Salerno, Salerno, Italy
| | - M Romano
- Hepatogastroenterology Division, Department of Precision Medicine, University of Campania Luigi Vanvitelli, Naples, Italy.
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Bray J, Miranda A, Keely-Smith A, Kaserzon S, Elisei G, Chou A, Nichols SJ, Thompson R, Nugegoda D, Kefford BJ. Sub-organism (acetylcholinesterase activity), population (survival) and chemical concentration responses reinforce mechanisms of antagonism associated with malathion toxicity. Sci Total Environ 2021; 778:146087. [PMID: 34030370 DOI: 10.1016/j.scitotenv.2021.146087] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 07/31/2020] [Revised: 02/05/2021] [Accepted: 02/20/2021] [Indexed: 06/12/2023]
Abstract
Within human modified ecosystems the effects of individual stressors are difficult to establish amid co-occurring biological processes, environmental gradients and other stressors. Coupled examination of several endpoints across different levels of organisation may help elucidate the individual and combined effects of stressors and interactions. Malathion is a commonly used organophosphate pesticide that contaminates freshwaters and has strong negative effects on aquatic biota. However, both other stressors (e.g. increased sediment) and common ecosystem components (e.g. macrophytes and variable pH) can reduce the aqueous concentrations of malathion, reducing its toxic effects. We conducted a fully orthogonal bioassay to examine how pH (at 7 and 7.8) and sorptive processes (across two levels of kaoline clay 0 and 24 g L-1) affected aqueous malathion concentrations and toxicity in an aquatic invertebrate genus. Survival and acetylcholinesterase activity as a sub-organism response were examined in the mayfly Coloburiscoides spp. (Ephemeroptera; Coluburiscidae). Measured aqueous malathion concentrations decreased with increased pH and in the presence of kaolin clay. Survival declined with increasing malathion concentrations and exposure period. Results further identify that antagonism of malathion toxicity was associated with both pH (alkaline hydrolysis) and effects associated with sediment independent of pH (driven by sorptive processes). However, model predictions varied associated with target and measured concentrations and concentrations examined. Antagonistic effects were most apparent using subset target malathion concentrations because of the dominant effect of malathion at high concentrations. Acetylcholinesterase activity, identified repression occurred across all treatments and did not identify antagonistic interactions, but these results were similar to survival responses at the time points examined (i.e. 120 h). Examination of chemistry, acetylcholinesterase, and survival, affords greater understanding of stressor effects and their interactions. Measured malathion concentrations may underestimate effects on aquatic biota; not because of synergism among stressors, but because of strong effects despite antagonism.
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Affiliation(s)
- J Bray
- Center for Applied Water Science, Institute for Applied Ecology, University of Canberra, Canberra, Australia; Gisborne District Council, Gisborne, New Zealand.
| | - A Miranda
- AQUEST research group, RMIT University, Melbourne, Australia
| | - A Keely-Smith
- Center for Applied Water Science, Institute for Applied Ecology, University of Canberra, Canberra, Australia
| | - S Kaserzon
- QAEHS, University of Queensland, Brisbane, Australia
| | - G Elisei
- QAEHS, University of Queensland, Brisbane, Australia
| | - A Chou
- Brigham Young University, UT, United States
| | - S J Nichols
- Center for Applied Water Science, Institute for Applied Ecology, University of Canberra, Canberra, Australia
| | - R Thompson
- Center for Applied Water Science, Institute for Applied Ecology, University of Canberra, Canberra, Australia
| | - D Nugegoda
- AQUEST research group, RMIT University, Melbourne, Australia
| | - B J Kefford
- Center for Applied Water Science, Institute for Applied Ecology, University of Canberra, Canberra, Australia
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Oliveira C, Valois MV, Ottaiano TF, Miranda A, Hansen D, Sampaio MU, Oliva MLV, de Abreu Maffei FH. The recombinant plant Bauhinia bauhinioides elastase inhibitor reduces rat thrombus without alterations in hemostatic parameters. Sci Rep 2021; 11:13475. [PMID: 34188079 PMCID: PMC8241853 DOI: 10.1038/s41598-021-92745-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Accepted: 06/10/2021] [Indexed: 11/26/2022] Open
Abstract
The anti-inflammatory effects of the plant protease inhibitor BbCI (Bauhinia bauhinioides cruzipain inhibitor), which blocks elastase, cathepsin G, and L, and proteinase 3 has been demonstrated. Here, we investigated the recombinant rBbCI-His(6) (containing a histidine tail) in an experimental venous thrombosis model of vena cava (VC) ligature in rats, comparing to heparin. We evaluate the effects of the inhibitors (native or recombinant) or heparin on the activated partial thromboplastin time (aPTT) and prothrombin time (PT) in human and rat plasmas. The rats undergoing treatment received a saline solution or increasing concentrations of rBbCI-His(6), heparin, or a mixture of both. After 4 h of ligature VC, thrombus, if present was removed and weighed. aPTT, PT, and cytokines were measured in blood collected by cardiac puncture. aPTT, PT, and bleeding time (BT) were also measured at the time of VC (vena cava) ligature. rBbCI-His(6) (0.45 or 1.40 mg/kg) does not alter aPTT, PT or BT. No differences in coagulation parameters were detected in rBbCI-His(6) treated rats at the time of VC ligature or when the thrombus was removed. There was a significant decrease in the weight of thrombus in the animals of the groups treated with the rBbCI-His(6) (1.40 mg/kg), with the rBbCI-His(6) mixture (1.40 mg/kg) + heparin (50 IU/kg) and heparin (100 IU/kg) in relation to control group (saline). The growth-related oncogene/keratinocyte chemoattractant (GRO/KC) serum levels in rats treated with rBbCI-His(6) (1.40 mg/kg) or heparin (200 IU/kg) were reduced. In the experimental model used, rBbCI-His(6) alone had an antithrombotic effect, not altering blood clotting or bleeding time.
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Affiliation(s)
- Cleide Oliveira
- Departamento de Bioquímica, Universidade Federal de São Paulo, Rua Três de Maio, 100, São Paulo, SP, 04044-020, Brazil
| | - Mayara Vioto Valois
- Departamento de Bioquímica, Universidade Federal de São Paulo, Rua Três de Maio, 100, São Paulo, SP, 04044-020, Brazil
| | - Tatiana Fontes Ottaiano
- Departamento de Bioquímica, Universidade Federal de São Paulo, Rua Três de Maio, 100, São Paulo, SP, 04044-020, Brazil
| | - Antonio Miranda
- Departamento de Biofísica, Universidade Federal de São Paulo, São Paulo, SP, 04044-020, Brazil
| | - Daiane Hansen
- Departamento de Bioquímica, Universidade Federal de São Paulo, Rua Três de Maio, 100, São Paulo, SP, 04044-020, Brazil
| | - Misako Uemura Sampaio
- Departamento de Bioquímica, Universidade Federal de São Paulo, Rua Três de Maio, 100, São Paulo, SP, 04044-020, Brazil
| | - Maria Luiza Vilela Oliva
- Departamento de Bioquímica, Universidade Federal de São Paulo, Rua Três de Maio, 100, São Paulo, SP, 04044-020, Brazil.
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ZAMORA N, Arduz J, Molina A, Miranda A. POS-553 PRESENCE AND SEVERITY OF COVID-19 PANDEMIC-ASSOCIATED DEPRESSION IN PATIENTS UNDERGOING HEMODIALYSIS AT THE TARIJA DEPARTMENTAL NEPHROLOGY AND HEMODIALYSIS CENTER – BOLIVIA. Kidney Int Rep 2021. [PMCID: PMC8049693 DOI: 10.1016/j.ekir.2021.03.581] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Tonon KM, Morais TB, Taddei CR, Araújo-Filho HB, Abrão ACFV, Miranda A, de Morais MB. Gut microbiota comparison of vaginally and cesarean born infants exclusively breastfed by mothers secreting α1-2 fucosylated oligosaccharides in breast milk. PLoS One 2021; 16:e0246839. [PMID: 33556125 PMCID: PMC7870049 DOI: 10.1371/journal.pone.0246839] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 01/26/2021] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Exclusive breastfeeding promotes beneficial modifications on the microbiota of cesarean born infants, but little is known about the role of specific breast milk components in this modulation. Women with an active FUT2 gene (called secretors) secrete α1-2 fucosylated human milk oligosaccharides (HMOs), which promote Bifidobacterium in the infant's gut and may modulate the microbiota of cesarean born infants. OBJECTIVE To compare the microbiota composition of cesarean and vaginally born infants breastfed by secretor mothers. METHODS Maternal secretor status was determined by the occurrence of 4 different α1-2 fucosylated HMOs in breast milk by LC-MS. The fecal microbiota composition from cesarean and vaginally born infants was analyzed by 16S rRNA gene sequencing and qPCR, stratified by the maternal secretor status, and compared. RESULTS Alpha and beta diversity were not significantly different in cesarean born, secretor-fed infants (CSe+) compared to vaginally born, secretor-fed infants (VSe+). There were no significant differences in the fecal relative abundance of Bifidobacterium between CSe+ and VSe+ infants, but the prevalence of the species B. longum was lower in CSe+. The fecal relative abundance of Bacteroides was also lower, while Akkermansia and Kluyvera were higher in CSe+ infants. CONCLUSION Cesarean and vaginally born infants fed with breast milk containing the α1-2 fucosylated HMOs fraction present similar amounts of Bifidobacterium in the feces, but differences are observed in other members of the microbiota.
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Affiliation(s)
- Karina M. Tonon
- Nutrition Postgraduate Program, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Tania B. Morais
- Food Quality Control Laboratory, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Carla R. Taddei
- Department of Clinical and Toxicological Analysis, Universidade de São Paulo, São Paulo, Brazil
- School of Arts, Sciences and Humanities, Universidade de São Paulo, São Paulo, Brazil
| | | | - Ana Cristina F. V. Abrão
- Breastfeeding Incentive and Support Center, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Antonio Miranda
- Department of Biophysics, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Mauro B. de Morais
- Division of Pediatric Gastroenterology, Universidade Federal de São Paulo, São Paulo, Brazil
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Miranda A, Arroyo P, Zarraga M, Suarez SA, Baggio R, Moreno Y. Structure of Organic Compound (E)-3-((S)1-Phenylethylamine)methylene R (+) Camphor. CRYSTALLOGR REP+ 2020. [DOI: 10.1134/s1063774520070111] [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: 11/23/2022]
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Cerrolaza M, Campos A, Méndez A, Gascón M, Miranda A, Flamarique S, Lozares S, Navarro V, Ibañez R. PO-1144: Adjuvant electronic brachytherapy for patients with endometrial cancer. Radiother Oncol 2020. [DOI: 10.1016/s0167-8140(21)01161-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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MZ M, Miranda A, Armbrust R, Neymeyer J, Sehouli J, Muallem J. Nerve sparing radical hysterectomy: Short-term oncologic, surgical, and functional outcome. Geburtshilfe Frauenheilkd 2020. [DOI: 10.1055/s-0040-1718213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Affiliation(s)
- Muallem MZ
- Charité Universitätsmedizin Berlin, Campus Virchow-Klinikum
| | - A Miranda
- Charité Universitätsmedizin Berlin, Campus Virchow-Klinikum
| | - R Armbrust
- Charité Universitätsmedizin Berlin, Campus Virchow-Klinikum
| | - J Neymeyer
- Charité Universitätsmedizin Berlin, Campus Virchow-Klinikum
| | - J Sehouli
- Charité Universitätsmedizin Berlin, Campus Virchow-Klinikum
| | - J Muallem
- Charité Universitätsmedizin Berlin, Campus Virchow-Klinikum
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MZ M, Sehouli J, Miranda A, Richter R, Muallem J. Total Retroperitoneal en bloc resection Of Multivisceral-Peritoneal packet (TROMP operation): a novel surgical technique for advanced ovarian cancer. Geburtshilfe Frauenheilkd 2020. [DOI: 10.1055/s-0040-1718214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Affiliation(s)
- Muallem MZ
- Charité Universitätsmedizin Berlin, Campus Virchow-Klinikum
| | - J Sehouli
- Charité Universitätsmedizin Berlin, Campus Virchow-Klinikum
| | - A Miranda
- Charité Universitätsmedizin Berlin, Campus Virchow-Klinikum
| | - R Richter
- Charité Universitätsmedizin Berlin, Campus Virchow-Klinikum
| | - J Muallem
- Charité Universitätsmedizin Berlin, Campus Virchow-Klinikum
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Miranda A. O-38 Expansion Technic: Penile Length and Girth Enlargement with Minimal Tunica Albuginea Defect Without Graft to Correct Peyronie’s Disease During Penile Prosthesis Implantation. J Sex Med 2020. [DOI: 10.1016/j.jsxm.2020.07.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Miranda A. O-51 3D Printed Flexible Penile Model Simulator for Plaque Incision and Graft for Peyronie's Disease. J Sex Med 2020. [DOI: 10.1016/j.jsxm.2020.07.050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Zárraga M, Rivera F, Arroyo P, Miranda A, Baggio R, Alvares L, Moreno Y. SYNTHESIS AND CRYSTAL STRUCTURE ANALYSIS OF A NEW CHALCONE DERIVATIVE OF APOCYNIN. J Chil Chem Soc 2020. [DOI: 10.4067/s0717-97072020000204934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Diniz LCL, Alves FL, Miranda A, da Silva Junior PI. Two Tachykinin-Related Peptides with Antimicrobial Activity Isolated from Triatoma infestans Hemolymph. Microbiol Insights 2020; 13:1178636120933635. [PMID: 32843839 PMCID: PMC7416138 DOI: 10.1177/1178636120933635] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 05/15/2020] [Indexed: 12/29/2022] Open
Abstract
Antimicrobial peptides and proteins (AMPs) are molecules that can interact with
microbial cells and lead to membrane disruption or intracellular molecule
interactions and death. Several molecules with antimicrobial effects also
present other biological activities. One such protein group representing the
duplicity of activities is the tachykinin family. Tachykinins (TKs) form a
family of neuropeptides in vertebrates with a consensus C-terminal region
(F-X-G-Y-R-NH2). Invertebrate TKs and TK-related peptides (TKRPs) are
subfamilies found in invertebrates that present high homology with TKs and have
similar biological effects. Several of these molecules have already been
described but reports of TKRP in Hemiptera species are limited. By analyzing the
Triatoma infestans hemolymph by reversed-phase
high-performance liquid chromatography, biological assays, and mass
spectrometry, two antimicrobial molecules were isolated and identified as TKRPs,
which we named as TRP1-TINF and TRP2-TINF (tachykinin-related peptides I and II
from T. infestans). TRP1-TINF is a random secondary structure
peptide with 9 amino acid residues. It is susceptible to aminopeptidases
degradation and is active mainly against Micrococcus luteus (32
μM). TRP2-TINF is a 10-amino acid peptide with a 310 helix secondary structure
and is susceptible to carboxypeptidases degradation. It has major antimicrobial
activity against both Pseudomonas aeruginosa and
Escherichia coli (45 μM). Neither molecule is toxic to
human erythrocytes and both present minor toxicity toward Vero cells at a
concentration of 1000 μM. As the first description of TKRPs with antimicrobial
activity in T. infestans, this work contributes to the wider
comprehension of the insects’ physiology and describes pharmacological relevant
molecules.
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Affiliation(s)
- Laura Cristina Lima Diniz
- Center of Toxins, Immune-Response and Cell Signaling - CeTICS/CEPID, LAboratory of Applied Toxinology, Butantan Institute, São Paulo, Brazil.,Postgraduate Program Interunits in Biotechnology, Department of Biomedical Sciences, USP/IPT/IBU, São Paulo, Brazil
| | | | | | - Pedro Ismael da Silva Junior
- Center of Toxins, Immune-Response and Cell Signaling - CeTICS/CEPID, LAboratory of Applied Toxinology, Butantan Institute, São Paulo, Brazil.,Postgraduate Program Interunits in Biotechnology, Department of Biomedical Sciences, USP/IPT/IBU, São Paulo, Brazil
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Guarino F, Miranda A, Castiglione S, Cicatelli A. Arsenic phytovolatilization and epigenetic modifications in Arundo donax L. assisted by a PGPR consortium. Chemosphere 2020; 251:126310. [PMID: 32443249 DOI: 10.1016/j.chemosphere.2020.126310] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [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: 10/14/2019] [Revised: 02/12/2020] [Accepted: 02/21/2020] [Indexed: 05/27/2023]
Abstract
Arsenic-(As) pollution is an increasing threat across the globe and it is reaching harmful values in several areas of the world. In this perspective, we assayed bio-phyto-remediation technology using Arundo donax L., assisted by Plant Growth Promoting Bacteria (PGPB) consortium (BC) constituted of two strains of Stenotrophomonas maltophilia sp. and one of Agrobacterium sp.; furthermore, we assayed the epigenetic response to As pollution. The three bacterial strains initially evaluated for their As tolerance, revealed different resistance to both forms of As[As(III) and As(V)] however at concentration greater than those foreseen in the phytoremediation experiment (2.0, 10.0, 20.0 mgL-1 of NaAsO2). At the end of the trial plant biomass and As concentration were measured. Plants did not show any visible signs of toxicity, rather the leaf and stem biomass slightly increased in the presence of As and/or PGPBs; moreover, although the Bioaccumulation Factor was double in the presence of BC, the absolute values of As accumulation in the Arundo plants were very low, both in the presence or absence of BC and only detectable in the presence of the highest As dose (20 mgL-1 As). In this case, regardless the presence of PGPB, ≈25% of As remained in the sand and ≈0.15% was accumulated in the plant, whilst the remaining 75% was volatilized by transpiration. Finally, the methylation sensitive amplified polymorphisms (MSAP) of leaves were analyzed in order to investigate their epigenetic response to As and/or BC. Our results suggest that epigenetic modifications are involved in stress response and As detoxification.
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Affiliation(s)
- Francesco Guarino
- Department of Chemistry and Biology "A. Zambelli", University of Salerno, Fisciano, SA, Italy
| | - Antonio Miranda
- Department of Chemistry and Biology "A. Zambelli", University of Salerno, Fisciano, SA, Italy
| | - Stefano Castiglione
- Department of Chemistry and Biology "A. Zambelli", University of Salerno, Fisciano, SA, Italy.
| | - Angela Cicatelli
- Department of Chemistry and Biology "A. Zambelli", University of Salerno, Fisciano, SA, Italy
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Niklander SE, Martínez M, Miranda A, Rodriguez M. Treatment alternatives for dry mouth: A scoping review. J Clin Exp Dent 2020; 14:e846-e853. [DOI: 10.4317/jced.59912] [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] [Received: 07/15/2022] [Accepted: 08/16/2022] [Indexed: 11/05/2022] Open
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Baixauli I, Mira A, Berenguer C, Roselló B, Miranda A. Family Factors and Communicative Skills in Children with Autism Without Intellectual Disability. J Autism Dev Disord 2019; 49:5023-5035. [DOI: 10.1007/s10803-019-04216-5] [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: 10/26/2022]
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Miranda A, Diaz-Santos M, Suarez P, Cagigas X. AGR - 3 Socially Responsible Neuropsychology (SRN) in Action: Navigating Relevant Socio-Cultural and Educational Factors in Frontotemporal Dementia. Arch Clin Neuropsychol 2019. [DOI: 10.1093/arclin/acz037.03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Objective
Socio-cultural factors obscure diagnostic specificity for neurodegenerative disorders, particularly among minority or foreign-born patients with limited access to education. Our objective with the following case presentation is to illustrate the utility of a Socially Responsible Neuropsychology (SRN) model in guiding clinical practice through the comprehensive incorporation of significant, yet common, socio-cultural factors throughout the neuropsychological assessment.
Method
The present case involved a 79-year-old Spanish-speaking Mexican woman with two years of education, who underwent two serial neuropsychological assessments, as well as, structural/functional neuroimaging to monitor acute onset of telegraphic speech following the kidnapping of her husband. The SRN model guided clinical decision-making in understanding the onset and progression of symptoms within the context of medical-psychiatric comorbidities intertwined with socio-cultural and educational factors.
Results
Mild vascular neurocognitive disorder and complicated grief were the initial diagnostic impressions as supported by structural neuroimaging. Neuropsychological assessment over time, however, revealed progressive global cognitive decline whereas psychiatric symptomatology remained stable. In the presence of equivocal converging evidence from available neuroimaging studies (PET vs MRI), strong suspicion for the language variant of frontotemporal neurocognitive disorder was considered given the onset and progressive decline of expressive/receptive language, executive and memory abilities, and qualitative evidence for progressive behavioral disihibition.
Conclusion
Telegraphic speech in an elderly Latina woman that initially appeared most consistent with vascular neurocognitive disorder in the context of complex trauma with possible conversion disorder, was deemed most consistent with a neurodegenerative process after careful consideration of the time course and evolution of the neurocognitive profile over time within an SRN model.
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Yañez J, Diaz-Santos M, Rodes E, Cavanagh L, Suarez P, Miranda A, Cagigas X. C-14 Socially Responsible Neuropsychology (SRN) in Action: Assessment of a Highly Educated Bilingual Latina Older Adult. Arch Clin Neuropsychol 2019. [DOI: 10.1093/arclin/acz034.176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Objective
Early identification of cognitive symptoms pathognomonic of Alzheimer’s disease (AD) in highly educated bilingual adults remains challenging. We present a clinical case illustrating the application of an SRN model in a 70-year-old highly educated, balanced bilingual Latina eventually diagnosed with moderate-severe stages of AD following an event of severe confusion and disorientation.
Method
An SRN model was applied to promote equitable care through evidence-based consideration of cognitive aging-reserve and its putative manifestation in neurodegenerative disorders. The patient underwent a neuropsychological assessment and structural/functional neuroimaging. Her educational background, linguistic proficiencies, acculturation level, social/behavioral comportment, and limitations in available neuropsychological tools/norms were integrated to reflect the complexity in conducting a reliable bilingual assessment and formulating differential diagnoses.
Results
The SRN model guided clinical decision-making to determine the appropriate target language for bilingual assessment, and to identify reliable normative anchors of impairment relative to premorbid estimates, resulting in incorporation of validated Spanish measures/norms. Neuroimaging revealed bilateral parietal-temporal hypometabolism, which was generally consistent with neuropsychological findings, and the patient was diagnosed with major neurocognitive disorder due to AD.
Conclusions
Given the advanced nature of this patient’s cognitive decline by the time of assessment, it was hypothesized that the combination of bilingualism and high education further masked the precipitous decline atypically observed in AD individuals with high cognitive reserve. Cognitive reserve theories, nonetheless, continue to be anchored strictly within a monocultural-monolingual framework. This complex case, therefore, highlights the urgent need to incorporate bilingualism in current models of cognitive reserve to boost sensitivity in detecting early expression of bilingual AD.
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Delgoffe A, Miranda A, Rigal B, Lyasota A, Rudra A, Dwir B, Kapon E. Tilted-potential photonic crystal cavities for integrated quantum photonics. Opt Express 2019; 27:21822-21833. [PMID: 31510252 DOI: 10.1364/oe.27.021822] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Accepted: 06/28/2019] [Indexed: 06/10/2023]
Abstract
We propose and investigate a new type of photonic crystal (PhC) cavity for integrated quantum photonics, which provides tailored optical modes with both confined and extended spatial components. The structures consist of elongated PhC cavities in which the effective index of refraction is varied quasi-linearly along their axis, implemented by systematic lateral shifts of the PhC holes. The confined modes have approximately Airy-function envelopes, exhibiting single peaks and extended tails, which is useful for optimizing single photon extraction and transmission in integrated quantum photonic devices. The measured spectrally resolved near-field patterns of such devices show the expected spatial and resonance wavelength behavior, in agreement with numerical simulations of the Airy-Bloch modes. The effects of fabrication-induced disorder on the mode features are also analyzed and discussed. Selective excitation of specific Airy-Bloch modes using integrated, site-controlled quantum dots as localized light sources is demonstrated. Based on the tilted-potential cavity, multiple-QD single photon emitters exploiting wavelength division multiplexing are proposed.
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Miranda A, De Musis C, Sgambato D, De Mauro D, Picascia D, Avallone L, Romano L, D'Armiento FP, Romano M. Cryptosporidiosis in a patient with Crohn's disease under anti-TNF treatment. Acta Gastroenterol Belg 2019; 82:447-448. [PMID: 31566337] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Affiliation(s)
- A Miranda
- Department of Precision Medicine, Division of Gastroenterology and Digestive Endoscopy, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - C De Musis
- Department of Precision Medicine, Division of Gastroenterology and Digestive Endoscopy, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - D Sgambato
- Department of Precision Medicine, Division of Gastroenterology and Digestive Endoscopy, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - D De Mauro
- Department of Precision Medicine, Division of Gastroenterology and Digestive Endoscopy, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - D Picascia
- Department of Precision Medicine, Division of Gastroenterology and Digestive Endoscopy, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - L Avallone
- Department of Precision Medicine, Division of Gastroenterology and Digestive Endoscopy, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - L Romano
- Department of Precision Medicine, Division of Gastroenterology and Digestive Endoscopy, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - F P D'Armiento
- Department of Precision Medicine, Division of Gastroenterology and Digestive Endoscopy, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - M Romano
- Pathology Unit, University Federico II, Naples, Italy
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Miranda A, De Musis C, Sgambato D, De Mauro D, Picascia D, Avallone L, Romano L, D'Armiento FP, Romano M. Cryptosporidiosis in a patient with Crohn's disease under anti-TNF treatment. Acta Gastroenterol Belg 2019; 82:447-448. [PMID: 31566337] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/22/2024]
Affiliation(s)
- A Miranda
- Department of Precision Medicine, Division of Gastroenterology and Digestive Endoscopy, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - C De Musis
- Department of Precision Medicine, Division of Gastroenterology and Digestive Endoscopy, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - D Sgambato
- Department of Precision Medicine, Division of Gastroenterology and Digestive Endoscopy, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - D De Mauro
- Department of Precision Medicine, Division of Gastroenterology and Digestive Endoscopy, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - D Picascia
- Department of Precision Medicine, Division of Gastroenterology and Digestive Endoscopy, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - L Avallone
- Department of Precision Medicine, Division of Gastroenterology and Digestive Endoscopy, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - L Romano
- Department of Precision Medicine, Division of Gastroenterology and Digestive Endoscopy, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - F P D'Armiento
- Department of Precision Medicine, Division of Gastroenterology and Digestive Endoscopy, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - M Romano
- Pathology Unit, University Federico II, Naples, Italy
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M Tonon K, B de Morais M, F V Abrão AC, Miranda A, B Morais T. Maternal and Infant Factors Associated with Human Milk Oligosaccharides Concentrations According to Secretor and Lewis Phenotypes. Nutrients 2019; 11:E1358. [PMID: 31212920 PMCID: PMC6628139 DOI: 10.3390/nu11061358] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Revised: 06/01/2019] [Accepted: 06/04/2019] [Indexed: 12/17/2022] Open
Abstract
Human milk oligosaccharides (HMOs) are multifunctional carbohydrates naturally present in human milk that act as prebiotics, prevent pathogen binding and infections, modulate the immune system and may support brain development in infants. HMOs composition is very individualized and differences in HMOs concentrations may affect the infant's health. HMOs variability can be partially explained by the activity of Secretor (Se) and Lewis (Le) genes in the mother, but non-genetic maternal factors may also be involved. In this cross-sectional, observational study, 78 single human milk samples ranging from 17 to 76 days postpartum (median: 32 days, IQR: 25-46 days) were collected from breastfeeding Brazilian women, analyzed for 16 representative HMOs by liquid chromatography coupled to mass spectrometry and associations between maternal and infant factors with HMOs concentrations were investigated. HMOs concentrations presented a high variability even in women with the same SeLe phenotype and associations with maternal allergic disease, time postpartum and with infant's weight, weight gain and sex. Overall, we present unprecedented data on HMOs concentrations from breastfeeding Brazilian women and novel associations of maternal allergic disease and infant's sex with HMOs concentrations. Differences in HMOs composition attributed to maternal SeLe phenotype do not impact infant growth, but higher concentrations of specific HMOs may protect against excessive weight gain.
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Affiliation(s)
- Karina M Tonon
- Nutrition Postgraduate Program, Universidade Federal de São Paulo, São Paulo 040024-002, Brazil.
| | - Mauro B de Morais
- Division of Pediatric Gastroenterology, Universidade Federal de São Paulo, São Paulo 04020-040, Brazil.
| | - Ana Cristina F V Abrão
- Breastfeeding Incentive and Support Center, Universidade Federal de São Paulo, São Paulo 04037-001, Brazil.
| | - Antonio Miranda
- Department of Biophysics, Universidade Federal de São Paulo, São Paulo 04044-020, Brazil.
| | - Tania B Morais
- Food Quality Control Laboratory, Universidade Federal de São Paulo, São Paulo 040024-002, Brazil.
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Díaz-Roa A, Espinoza-Culupú A, Torres-García O, Borges MM, Avino IN, Alves FL, Miranda A, Patarroyo MA, da Silva PI, Bello FJ. Sarconesin II, a New Antimicrobial Peptide Isolated from Sarconesiopsis magellanica Excretions and Secretions. Molecules 2019; 24:E2077. [PMID: 31159162 PMCID: PMC6600161 DOI: 10.3390/molecules24112077] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Revised: 04/11/2019] [Accepted: 04/20/2019] [Indexed: 01/13/2023] Open
Abstract
Antibiotic resistance is at dangerous levels and increasing worldwide. The search for new antimicrobial drugs to counteract this problem is a priority for health institutions and organizations, both globally and in individual countries. Sarconesiopsis magellanica blowfly larval excretions and secretions (ES) are an important source for isolating antimicrobial peptides (AMPs). This study aims to identify and characterize a new S. magellanica AMP. RP-HPLC was used to fractionate ES, using C18 columns, and their antimicrobial activity was evaluated. The peptide sequence of the fraction collected at 43.7 min was determined by mass spectrometry (MS). Fluorescence and electronic microscopy were used to evaluate the mechanism of action. Toxicity was tested on HeLa cells and human erythrocytes; physicochemical properties were evaluated. The molecule in the ES was characterized as sarconesin II and it showed activity against Gram-negative (Escherichia coli MG1655, Pseudomonas aeruginosa ATCC 27853, P. aeruginosa PA14) and Gram-positive (Staphylococcus aureus ATCC 29213, Micrococcus luteus A270) bacteria. The lowest minimum inhibitory concentration obtained was 1.9 μM for M. luteus A270; the AMP had no toxicity in any cells tested here and its action in bacterial membrane and DNA was confirmed. Sarconesin II was documented as a conserved domain of the ATP synthase protein belonging to the Fli-1 superfamily. The data reported here indicated that peptides could be alternative therapeutic candidates for use in infections against Gram-negative and Gram-positive bacteria and eventually as a new resource of compounds for combating multidrug-resistant bacteria.
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Affiliation(s)
- Andrea Díaz-Roa
- Special Laboratory for Applied Toxinology (LETA), Butantan Institute, São Paulo CEP 05503-900, SP, Brazil.
- Institute of Biomedical Sciences, University of São Paulo, São Paulo CEP 05508-900, SP, Brazil.
- PhD Program in Biomedical and Biological Sciences, Universidad del Rosario, Bogotá 111221, Colombia.
| | - Abraham Espinoza-Culupú
- Institute of Biomedical Sciences, University of São Paulo, São Paulo CEP 05508-900, SP, Brazil.
- Bacteriology Laboratory, Butantan Institute, São Paulo CEP 05503-900, SP, Brazil.
| | | | - Monamaris M Borges
- Bacteriology Laboratory, Butantan Institute, São Paulo CEP 05503-900, SP, Brazil.
| | - Ivan N Avino
- Special Laboratory of Cell Cycle (LECC), Butantan Institute, São Paulo CEP 05503-900, SP, Brazil.
| | - Flávio L Alves
- Biophysics Department, UNIFESP, São Paulo CEP 04023-062, Brazil.
| | - Antonio Miranda
- Biophysics Department, UNIFESP, São Paulo CEP 04023-062, Brazil.
| | - Manuel A Patarroyo
- Molecular Biology and Immunology Department, Fundación Instituto de Inmunología de Colombia (FIDIC), Bogotá 111321, Colombia.
- Basic Sciences Department, School of Medicine and Health Sciences, Universidad del Rosario, Bogotá 112111, Colombia.
| | - Pedro I da Silva
- Special Laboratory for Applied Toxinology (LETA), Butantan Institute, São Paulo CEP 05503-900, SP, Brazil.
- Institute of Biomedical Sciences, University of São Paulo, São Paulo CEP 05508-900, SP, Brazil.
| | - Felio J Bello
- Faculty of Agricultural and Livestock Sciences, Veterinary Medicine Programme, Universidad de La Salle, Bogotá 110141, Colombia.
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Subroto T, Eskin DG, Tzanakis I, Lebon GSB, Miranda A, Pericleous K. Optimization of ultrasonic cavitation processing in the liquid melt flow. ACTA ACUST UNITED AC 2019. [DOI: 10.1088/1757-899x/529/1/012050] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Costa M, Lima R, Melo-Fonseca F, Bartolomeu F, Alves N, Miranda A, Gasik M, Silva F, Silva N, Miranda G. Development of β-TCP-Ti6Al4V structures: Driving cellular response by modulating physical and chemical properties. Materials Science and Engineering: C 2019; 98:705-716. [DOI: 10.1016/j.msec.2019.01.016] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 01/04/2019] [Accepted: 01/04/2019] [Indexed: 01/05/2023]
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Mello LR, Hamley IW, Miranda A, Alves WA, Silva ER. β
‐
sheet assembly in amyloidogenic glutamic acid nanostructures: Insights from X‐ray scattering and infrared nanospectroscopy. J Pept Sci 2019; 25:e3170. [DOI: 10.1002/psc.3170] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Revised: 03/06/2019] [Accepted: 03/12/2019] [Indexed: 11/09/2022]
Affiliation(s)
- Lucas R. Mello
- Departamento de BiofísicaUniversidade Federal de São Paulo São Paulo Brazil
| | - Ian W. Hamley
- Department of ChemistryUniversity of Reading Reading UK
| | - Antonio Miranda
- Departamento de BiofísicaUniversidade Federal de São Paulo São Paulo Brazil
| | - Wendel A. Alves
- Centro de Ciências Naturais e HumanasUniversidade Federal do ABC Santo André Brazil
| | - Emerson R. Silva
- Departamento de BiofísicaUniversidade Federal de São Paulo São Paulo Brazil
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Tonon KM, Miranda A, Abrão ACF, de Morais MB, Morais TB. Validation and application of a method for the simultaneous absolute quantification of 16 neutral and acidic human milk oligosaccharides by graphitized carbon liquid chromatography – electrospray ionization – mass spectrometry. Food Chem 2019; 274:691-697. [DOI: 10.1016/j.foodchem.2018.09.036] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 09/03/2018] [Accepted: 09/04/2018] [Indexed: 01/18/2023]
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Salgado-Mejias P, Alves FL, Françoso KS, Riske KA, Silva ER, Miranda A, Soares IS. Structure of Rhoptry Neck Protein 2 is essential for the interaction in vitro with Apical Membrane Antigen 1 in Plasmodium vivax. Malar J 2019; 18:25. [PMID: 30683104 PMCID: PMC6347818 DOI: 10.1186/s12936-019-2649-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 01/13/2019] [Indexed: 01/24/2023] Open
Abstract
BACKGROUND In several Apicomplexa, the formation of moving junctions (MJs) at the interface between the external membranes of the invading parasite and the host cell is essential for the process of parasite invasion. In Plasmodium falciparum and Toxoplasma gondii, the MJ is composed of the Apical Membrane Antigen 1 (AMA1) and Rhoptry Neck Proteins (RONs) complex; specifically, AMA1 interacts with RON2 during host cell invasion. METHODS Recombinant proteins based on Plasmodium vivax RON2 (A2033-P2100) and its synthetic peptide fragments, one cyclic and one linear, based on PvRON2 (D2035-T2074) were generated and used to evaluate the interaction with P. vivax AMA1 (PvAMA1) by the far western blot, surface plasmon resonance (SPR), and isothermal titration microcalorimetry (ITC) methods. The structural studies of peptides were performed by circular dichroism, and the structural analysis of the complex of PvAMA1 with peptides based on PvRON2 (D2035-T2074) was conducted with small-angle X-ray scattering (SAXS). RESULTS Surface plasmon resonance (KD = 23.91 ± 2.078 μmol/L) and ITC (K = 3 × 105 mol/L) studies conclusively showed an interaction between the cyclic peptide based on PvRON2 and PvAMA1-His6. In contrast, the linear peptide and recombinant PvRON2 (GST fusion protein) did not show an interaction with PvAMA1. However, the interaction among recombinant proteins PvRON2.2 and PvAMA1-His6 was possible to show by far western blot. CONCLUSIONS The results show that the PvRON2 structure, particularly the S-S bond between C2051 and C2063, is determinant for the existence of the interaction between PvAMA1 and PvRON2.
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Affiliation(s)
- Perla Salgado-Mejias
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, SP, Brazil.,Department of Chemical Sciences and Natural Resources, Faculty of Engineering and Science, University of La Frontera, Temuco, Chile
| | - Flavio L Alves
- Departamento de Biofísica, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Kátia S Françoso
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Karin A Riske
- Departamento de Biofísica, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Emerson R Silva
- Departamento de Biofísica, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Antonio Miranda
- Departamento de Biofísica, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Irene S Soares
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, SP, Brazil.
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Velázquez A, Álvarez H, Villaseñor F, Miranda A, Manzanares N, Romo S, Kjelland M. 197 Effect of follicle-stimulating hormone administered during different time intervals in superovulation protocols in beef cattle. Reprod Fertil Dev 2019. [DOI: 10.1071/rdv31n1ab197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Multiple ovulation and embryo transfer (MOET) is a biotechnology widely used for genetic improvement in cattle; however, there is great variability in donor response. Differences between management, genotype, environmental conditions, among other factors, can affect MOET results. The traditional protocols consist of 8 twice-daily FSH applications in decreasing dosages over 4 days. Reducing donor handling during MOET is an alternative for embryo production. The aim of this research was to evaluate a simplified protocol, testing single daily administrations of FSH over 4 days, without modifying the total dose calculated for treatment. The study was conducted in northern Mexico. Beef cattle donors (n=30) were used, 15 with control treatment (CT) and 15 with simplified treatment (ST). All donors were examined beforehand, focusing on the reproductive tract and body score condition, i.e. 5 to 7 (scale of 1-9). Intravaginal devices (IVD) Dispocel Max (Von Franken, Buenos Aires, Argentina) with 1.2g of progesterone were inserted and 2.5mg of oestradiol benzoate (Internacional Prode, Mexico) IM was applied on Day 0; FSH (Folltropin-V, Vetoquinol, Lure, France), applications were started on day 4. For CT, the FSH administration was done twice daily (at a 12-h interval), in 8 decreasing doses, and 150µg of D-cloprostenol (D-CLO; Prostagenol-D, International Prode, Guadalajara, Mexico) was administered IM in the morning and afternoon of Day 6. In the ST, donors were treated with once-daily injections of decreasing doses of FSH over 4 days, and 150µg of D-CLO was administered IM on Days 6 and 7. The IVD were removed on Day 7 and oestrus was detected using heat detection patches. Artificial insemination was performed using conventional frozen semen at 12, 20, and, in case of persistent heat, 30h after oestrus detection. Embryo collection was performed 7 days after insemination. The ovarian response was assessed by counting the corpora lutea (CL) detected by ultrasound. Embryo collection was performed by closed method. Analysis of variance was used with the GLM procedure in SAS software (version 9.3; SAS Institute Inc., Cary, NC, USA), to evaluate the results of ST compared with CT (α-level=0.05). The cattle breed and ranch identification were considered in the analyses. The number of CL in ST and CT was 6.8±1.6 and 8.8±1.5, respectively. The number of oocytes/embryos recovered in ST and CT were 7.3±3.0 and 11.4±2.7, respectively. The number of viable embryos (transferred or frozen) in ST and CT were 2.6±1.7 and 4.7±1.6, respectively. The number of unfertilized oocytes were 2.8±1.5 in ST and 4.2±1.3 in CT. The number of degenerated embryos in the ST were 2.0±1.1 and 1.0±1.0 in the CT. There were no significant differences between groups (P>0.05) for all variables analysed. Although the number of transferable embryos was numerically higher in the CT group, differences were not significant. Nevertheless, ST can be an alternative superovulation protocol, because working once a day saves time and facilitates the implementation of the MOET technique.
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Diniz LCL, Miranda A, da Silva PI. Human Antimicrobial Peptide Isolated From Triatoma infestans Haemolymph, Trypanosoma cruzi-Transmitting Vector. Front Cell Infect Microbiol 2018; 8:354. [PMID: 30425969 PMCID: PMC6218679 DOI: 10.3389/fcimb.2018.00354] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Accepted: 09/18/2018] [Indexed: 01/01/2023] Open
Abstract
The importance of antimicrobial peptides (AMPs) in relation to the survival of invertebrates is well known. The source and the mode of action on the insects' immune system of these molecules have been described from different perspectives. Insects produce their own AMPs as well as obtain these molecules from various sources, for example by absorption through the intestinal tract, as previously described for Boophilus microplus. Blood-sucking barber bug Triatoma infestans attracts social, economic and medical interest owing to its role in the transmission of Chagas disease. Despite new studies, descriptions of AMPs from this insect have remained elusive. Thus, the aims of this work were to characterize the antimicrobial potential of human fibrinopeptide A (FbPA) obtained from the T. infestans haemolymph and identify its natural source. Therefore, FbPA was isolated from the T. infestans haemolymph through liquid chromatography and identified by mass spectrometry. This peptide exhibited antimicrobial activity against Micrococcus luteus. Native FbPA from human blood and the synthetic FbPA also exhibited antimicrobial activity. The synthetic FbPA was conjugated with fluorescein isothiocyanate and offered to the insects. The haemolymph collected after 72 h exhibited fluorescence at the same wavelength as fluorescein isothiocyanate. Our experiments show that beyond intrinsic AMP production, T. infestans is able to co-opt molecules via internalization and may use them as AMPs for protection.
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Affiliation(s)
- Laura Cristina Lima Diniz
- Special Laboratory of Toxinology, Butantan Institute, São Paulo, Brazil.,Post-Graduation Program Interunits in Biotechnology, USP/IPT/IBU, São Paulo, Brazil
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González I, Sosa AN, Trejo A, Calvino M, Miranda A, Cruz-Irisson M. Lithium effect on the electronic properties of porous silicon for energy storage applications: a DFT study. Dalton Trans 2018; 47:7505-7514. [PMID: 29789836 DOI: 10.1039/c8dt00355f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Theoretical studies on the effect of Li on the electronic properties of porous silicon are still scarce; these studies could help us in the development of Li-ion batteries of this material which overcomes some limitations that bulk silicon has. In this work, the effect of interstitial and surface Li on the electronic properties of porous Si is studied using the first-principles density functional theory approach and the generalised gradient approximation. The pores are modeled by removing columns of atoms of an otherwise perfect Si crystal, dangling bonds of all surfaces are passivated with H atoms, and then Li is inserted on interstitial positions on the pore wall and compared with the replacement of H atoms with Li. The results show that the interstitial Li creates effects similar to n-type doping where the Fermi level is shifted towards the conduction band with band crossings of the said level thus acquiring metallic characteristics. The surface Li introduces trap-like states in the electronic band structures which increase as the number of Li atom increases with a tendency to become metallic. These results could be important for the application of porous Si nanostructures in Li-ion batteries technology.
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Affiliation(s)
- I González
- Instituto Politécnico Nacional, Seccion de estudios de posgrado e investigación, ESIME Culhuacán, Av. Santa Ana 1000, San Francisco Culhuacán, Coyoacán, Ciudad de México, Mexico.
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de Santiago F, Trejo A, Miranda A, Salazar F, Carvajal E, Pérez LA, Cruz-Irisson M. Carbon monoxide sensing properties of B-, Al- and Ga-doped Si nanowires. Nanotechnology 2018; 29:204001. [PMID: 29480169 DOI: 10.1088/1361-6528/aab237] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Silicon nanowires (SiNWs) are considered as potential chemical sensors due to their large surface-to-volume ratio and their possible integration into arrays for nanotechnological applications. Detection of harmful gases like CO has been experimentally demonstrated, however, the influence of doping on the sensing capacity of SiNWs has not yet been reported. For this work, we theoretically studied the surface adsorption of a CO molecule on hydrogen-passivated SiNWs grown along the [111] crystallographic direction and compared it with the adsorption of other molecules such as NO, and O2. Three nanowire diameters and three dopant elements (B, Al and Ga) were considered, and calculations were done within the density functional theory framework. The results indicate that CO molecules are more strongly adsorbed on the doped SiNW than on the pristine SiNW. The following trend was observed for the CO adsorption energies: E A[B-doped] > E A[Al-doped] > E A[Ga-doped] > E A[undoped], for all diameters. The electronic charge transfers between the SiNWs and the adsorbed CO were estimated by using a Voronoi population analysis. The CO adsorbed onto the undoped SiNWs has an electron-acceptor character, while the CO adsorbed onto the B-, Al-, and Ga-doped SiNWs exhibits an electron-donor character. Comparing these results with the ones obtained for the NO and O2 adsorption, the larger CO adsorption energy on B-doped SiNWs indicates their good selectivity towards CO. These results suggest that SiNW-based sensors of toxic gases could represent a clear and advantageous application of nanotechnology in the improvement of human quality of life.
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Affiliation(s)
- F de Santiago
- Instituto Politécnico Nacional, ESIME-Culhuacán, Av. Santa Ana 1000, C.P. 04430, Ciudad de México, México
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Saps M, Lavigne JV, van Tilburg MA, Miranda A, Benninga MA, Taminiau JA, Di Lorenzo C. Endpoints, reliability, and meaningful changes in clinical trials for children with irritable bowel syndrome. The Rome foundation pediatric subcommittee on clinical trials. Neurogastroenterol Motil 2018; 30:e13308. [PMID: 29700958 DOI: 10.1111/nmo.13308] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2018] [Accepted: 01/09/2018] [Indexed: 12/10/2022]
Affiliation(s)
- M Saps
- Gastroenterology, University of Miami School of Medicine, Miami, USA
| | - J V Lavigne
- Child and Adolescent Psychiatry, Ann and Robert H. Lurie Children's Hospital of Chicago, Chicago, USA
| | - M A van Tilburg
- Division of Gastroenterology and Hepatology, University of North Carolina at Chapel Hill, Chapel Hill, USA.,Department of Medicine, Campbell University College of Pharmacy and Health Sciences, School of Pharmacy & Health Sciences, University of Washington School of Public Health, School of Social Work, USA
| | - A Miranda
- Medical College of Wisconsin, Peditarics, WI, USA
| | - M A Benninga
- Emma Children's Hospital/Academic Medical Centre, Pediatric Gastroenterology, Amsterdam, The Netherlands
| | | | - C Di Lorenzo
- Division of Pediatric Gastroenterology Nationwide, Nationwide Children's Hospital, Columbus, USA
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González-Macías A, Salazar F, Miranda A, Trejo-Baños A, Pérez LA, Carvajal E, Cruz-Irisson M. Lithium effects on the mechanical and electronic properties of germanium nanowires. Nanotechnology 2018; 29:154004. [PMID: 29372891 DOI: 10.1088/1361-6528/aaaad4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Semiconductor nanowire arrays promise rapid development of a new generation of lithium (Li) batteries because they can store more Li atoms than conventional crystals due to their large surface areas. During the charge-discharge process, the electrodes experience internal stresses that fatigue the material and limit the useful life of the battery. The theoretical study of electronic and mechanical properties of lithiated nanowire arrays allows the designing of electrode materials that could improve battery performance. In this work, we present a density functional theory study of the electronic band structure, formation energy, binding energy, and Young's modulus (Y) of hydrogen passivated germanium nanowires (H-GeNWs) grown along the [111] and [001] crystallographic directions with surface and interstitial Li atoms. The results show that the germanium nanowires (GeNWs) with surface Li atoms maintain their semiconducting behavior but their energy gap size decreases when the Li concentration grows. In contrast, the GeNWs can have semiconductor or metallic behavior depending on the concentration of the interstitial Li atoms. On the other hand, Y is an indicator of the structural changes that GeNWs suffer due to the concentration of Li atoms. For surface Li atoms, Y stays almost constant, whereas for interstitial Li atoms, the Y values indicate important structural changes in the GeNWs.
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Affiliation(s)
- A González-Macías
- Instituto Politécnico Nacional, ESIME-Culhuacán, Av. Santa Ana 1000, 04430, México, Ciudad de México
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Garcés M, Ulloa M, Miranda A, Bravo LA. Physiological and ultrastructural characterisation of a desiccation-tolerant filmy fern, Hymenophyllum caudiculatum: Influence of translational regulation and ABA on recovery. Plant Biol (Stuttg) 2018; 20:288-295. [PMID: 29105969 DOI: 10.1111/plb.12660] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [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: 07/17/2017] [Accepted: 10/27/2017] [Indexed: 06/07/2023]
Abstract
The filmy fern Hymenophyllum caudiculatum can lose 60% of its relative water content, remain dry for some time and recover 88% of photochemical efficiency after 30 min of rehydration. Little is known about the protective strategies and regulation of the cellular rehydration process in this filmy fern species. The aim of this study was to characterise the filmy fern ultrastructure during a desiccation-rehydration cycle, and measure the physiological effects of transcription/translation inhibitors and ABA during desiccation recovery. Confocal and transmission electron microscopy were used to compare changes in structure during fast or slow desiccation. Transcription (actinomycin D) and translation (cycloheximide) inhibitors and ABA were used to compare photochemical efficiency during desiccation recovery. Cell structure was conserved during slow desiccation and rehydration, constitutive properties of the cell wall, allowing invagination and folding of the membranes and an important change in chloroplast size. The use of a translational inhibitor impeded recovery of photochemical efficiency during the first 80 min of rehydration, but the transcriptional inhibitor had no effect. Exogenous ABA delayed photochemical inactivation, and endogenous ABA levels decreased during desiccation and rehydration. Frond curling and chloroplast movements are possible strategies to avoid photodamage. Constitutive membrane plasticity and rapid cellular repair can be adaptations evolved to tolerate a rapid recovery during rehydration. Further research is required to explore the importance of existing mRNAs during the first minutes of recovery, and ABA function during desiccation of H. caudiculatum.
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Affiliation(s)
- M Garcés
- Center of Plant, Soil Interaction and Natural Resources Biotechnology, Bioren, Universidad de La Frontera, Temuco, Chile
- Departamento de Ciencias Agronómicas y Recursos Naturales, Facultad de Ciencias Agropecuarias y Forestales, Universidad de La Frontera, Temuco, Chile
| | - M Ulloa
- Center of Plant, Soil Interaction and Natural Resources Biotechnology, Bioren, Universidad de La Frontera, Temuco, Chile
| | - A Miranda
- Center of Plant, Soil Interaction and Natural Resources Biotechnology, Bioren, Universidad de La Frontera, Temuco, Chile
| | - L A Bravo
- Center of Plant, Soil Interaction and Natural Resources Biotechnology, Bioren, Universidad de La Frontera, Temuco, Chile
- Departamento de Ciencias Agronómicas y Recursos Naturales, Facultad de Ciencias Agropecuarias y Forestales, Universidad de La Frontera, Temuco, Chile
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Carvalho KG, Bambirra FHS, Nicoli JR, Oliveira JS, Santos AMC, Bemquerer MP, Miranda A, Franco BDGM. Characterization of multiple antilisterial peptides produced by sakacin P-producing Lactobacillus sakei subsp. sakei 2a. Arch Microbiol 2018; 200:635-644. [PMID: 29349489 DOI: 10.1007/s00203-018-1477-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 12/21/2017] [Accepted: 01/04/2018] [Indexed: 01/12/2023]
Abstract
Antimicrobial compounds produced by lactic acid bacteria can be explored as natural food biopreservatives. In a previous report, the main antimicrobial compounds produced by the Brazilian meat isolate Lactobacillus sakei subsp. sakei 2a, i.e., bacteriocin sakacin P and two ribosomal peptides (P2 and P3) active against Listeria monocytogenes, were described. In this study, we report the spectrum of activity, molecular mass, structural identity and mechanism of action of additional six antilisterial peptides produced by Lb. sakei 2a, detected in a 24 h-culture in MRS broth submitted to acid treatment (pH 1.5) and proper fractionation and purification steps for obtention of free and cell-bound proteins. The six peptides presented similarity to different ribosomal proteins of Lb. sakei subsp sakei 23K and the molecular masses varied from 4.6 to 11.0 kDa. All peptides were capable to increase the efflux of ATP and decrease the membrane potential in Listeria monocytogenes. The activity of a pool of the obtained antilisterial compounds [enriched active fraction (EAF)] against Listeria monocytogenes in a food model (meat gravy) during refrigerated storage (4 °C) for 10 days was also tested and results indicated that the populations of L. monocytogenes in the food model containing the acid extract remained lower than those at time 0-day, evidencing that the acid extract of a culture of Lb. sakei 2a is a good technological alternative for the control of growth of L. monocytogenes in foods.
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Affiliation(s)
- Kátia G Carvalho
- Planta Piloto de Procesos Industriales Microbiológicos (PROIMI), CONICET, Av. Belgrano y Pje. Caseros, San Miguel de Tucumán, 4000, Tucumán, Argentina.
| | - Felipe H S Bambirra
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Jacques R Nicoli
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Jamil S Oliveira
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Alexandre M C Santos
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.,Departamento de Ciências Fisiológicas, Universidade Federal do Espírito Santo, Vitória, ES, Brazil
| | - Marcelo P Bemquerer
- EMBRAPA Recursos Genéticos e Biotecnologia, Parque Estação Biológica, Brasília, DF, Brazil
| | - Antonio Miranda
- Departamento de Biofísica, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Bernadette D G M Franco
- Food Research Center, Departamento de Alimentos e Nutrição Experimental, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, SP, Brazil
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Dal Mas C, Pinheiro D, Campeiro J, Mattei B, Oliveira V, Oliveira E, Miranda A, Perez K, Hayashi M. Biophysical and biological properties of small linear peptides derived from crotamine, a cationic antimicrobial/antitumoral toxin with cell penetrating and cargo delivery abilities. Biochimica et Biophysica Acta (BBA) - Biomembranes 2017; 1859:2340-2349. [DOI: 10.1016/j.bbamem.2017.09.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 08/15/2017] [Accepted: 09/05/2017] [Indexed: 02/06/2023]
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