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Fernandes MGO, Vilariça AS, Fernandes B, Camacho C, Saraiva C, Estevinho F, Novais E Bastos H, Lopes JM, Fidalgo P, Garrido P, Alves S, Silva S, Sequeira T, Barata F. Improving non-small-cell lung cancer survival through molecular characterization: Perspective of a multidisciplinary expert panel. Pulmonology 2024; 30:4-7. [PMID: 37210340 DOI: 10.1016/j.pulmoe.2022.11.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 11/29/2022] [Accepted: 11/30/2022] [Indexed: 05/22/2023] Open
Affiliation(s)
- M G O Fernandes
- Pulmonology Department, Centro Hospitalar e Universitário de São João, EPE, Porto, Portugal; Faculdade de Medicina da Universidade do Porto, Porto, Portugal; IBMC/i3S - Instituto de Biologia Molecular e Celular/Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal Pulmonology Department, Centro Hospitalar e Universitário de São João, EPE, Porto, Portugal.
| | - A S Vilariça
- Pulmonology Department, Centro Hospitalar e Universitário de Lisboa Norte, EPE - Hospital Pulido Valente, Lisboa, Portugal
| | - B Fernandes
- Pulmonology Department, Hospital de Braga, Braga, Portugal
| | - C Camacho
- Oncology Department, Serviço de Saúde da Região Autónoma da Madeira, Funchal, Portugal
| | - C Saraiva
- Pulmonology Department, Centro Hospitalar e Universitário do Algarve, EPE - Hospital de Portimão, Portugal
| | - F Estevinho
- Oncology Department, Unidade Local de Saúde de Matosinhos, EPE - Hospital Pedro Hispano, Matosinhos, Portugal
| | - H Novais E Bastos
- Pulmonology Department, Centro Hospitalar e Universitário de São João, EPE, Porto, Portugal; Faculdade de Medicina da Universidade do Porto, Porto, Portugal; IBMC/i3S - Instituto de Biologia Molecular e Celular/Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal Pulmonology Department, Centro Hospitalar e Universitário de São João, EPE, Porto, Portugal
| | - J M Lopes
- Pulmonology Department, Hospital Garcia de Orta, EPE, Almada, Portugal
| | - P Fidalgo
- Oncology Department, Centro Hospitalar e Universitário do Porto, EPE - Hospital de Santo António, Porto, Portugal
| | - P Garrido
- Pulmonology Department, Fundação Champalimaud, Lisboa, Portugal
| | - S Alves
- Oncology Department, Instituto Português de Oncologia do Porto Francisco Gentil, Porto, Portugal
| | - S Silva
- Pulmonology Department, Centro Hospital de Leiria, EPE - Hospital de Santo André, Leiria, Portugal
| | - T Sequeira
- Oncology Department, Centro Hospitalar e Universitário de Lisboa Central, EPE - Hospital Santo António dos Capuchos, Lisboa, Portugal
| | - F Barata
- Pulmonology Department; Centro Hospitalar e Universitário de Coimbra, EPE - Hospitais da Universidade de Coimbra, Coimbra, Portugal
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Gaspar LM, Gonçalves CI, Saraiva C, Cortez L, Amaral C, Nobre E, Lemos MC. Low frequency of AIP mutations in patients with young-onset sporadic pituitary macroadenomas. J Endocrinol Invest 2023; 46:2299-2307. [PMID: 37149543 PMCID: PMC10558361 DOI: 10.1007/s40618-023-02083-7] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Accepted: 03/28/2023] [Indexed: 05/08/2023]
Abstract
PURPOSE Mutations in the aryl hydrocarbon receptor interacting protein (AIP) gene cause familial isolated pituitary adenomas (FIPA). AIP mutations have also been found in patients with apparently sporadic pituitary adenomas, particularly in young patients with large adenomas. The aim of this study was to determine the frequency of AIP germline mutations in patients with young-onset sporadic pituitary macroadenomas. METHODS The AIP gene was sequenced in 218 Portuguese patients with sporadic pituitary macroadenomas diagnosed before the age of 40 years. RESULTS Heterozygous rare sequence variants in AIP were identified in 18 (8.3%) patients. However, only four (1.8%) patients had pathogenic or likely pathogenic variants. These consisted of two already known mutations (p.Arg81* and p.Leu115Trpfs*41) and two novel mutations (p.Glu246*, p.Ser53Thrfs*36). All four patients had GH-secreting adenomas diagnosed between the ages of 14 and 25 years. The frequency of AIP pathogenic or likely pathogenic variants in patients under the age of 30 and 18 years was 3.4% and 5.0%, respectively. CONCLUSION The frequency of AIP mutations in this cohort was lower than in other studies. Previous reports may have overestimated the contribution of AIP mutations due to the inclusion of genetic variants of uncertain significance. The identification of novel AIP mutations expands the known spectrum of genetic causes of pituitary adenomas and may help understand the role of AIP mutations in the molecular mechanisms underlying pituitary tumorigenesis.
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Affiliation(s)
- L M Gaspar
- CICS-UBI, Health Sciences Research Centre, University of Beira Interior, 6200-506, Covilhã, Portugal
| | - C I Gonçalves
- CICS-UBI, Health Sciences Research Centre, University of Beira Interior, 6200-506, Covilhã, Portugal
| | - C Saraiva
- Serviço de Endocrinologia, Hospital de Egas Moniz, Centro Hospitalar Lisboa Ocidental, Lisbon, Portugal
| | - L Cortez
- Serviço de Endocrinologia, Hospital de Curry Cabral, Centro Hospitalar Universitário Lisboa Central, Lisbon, Portugal
| | - C Amaral
- Serviço de Endocrinologia, Hospital de Santo António, Centro Hospitalar Universitário do Porto, Porto, Portugal
| | - E Nobre
- Serviço de Endocrinologia, Diabetes e Metabolismo, Hospital de Santa Maria, Centro Hospitalar Universitário Lisboa Norte, Lisbon, Portugal
| | - M C Lemos
- CICS-UBI, Health Sciences Research Centre, University of Beira Interior, 6200-506, Covilhã, Portugal.
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3
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Martinho M, Calé R, Ferreira F, Alegria S, Santos A, Vieira AC, Repolho D, Vitorino S, Saraiva C, Pereira H. Chronic thromboembolic pulmonary hypertension - the challenging approach of a young patient with distal disease. Pulmonology 2023; 29:435-437. [PMID: 37031000 DOI: 10.1016/j.pulmoe.2023.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Revised: 03/02/2023] [Accepted: 03/03/2023] [Indexed: 04/10/2023] Open
Affiliation(s)
- M Martinho
- Cardiology Department, Hospital Garcia de Orta, Almada, Portugal.
| | - R Calé
- Cardiology Department, Hospital Garcia de Orta, Almada, Portugal
| | - F Ferreira
- Cardiology Department, Hospital Garcia de Orta, Almada, Portugal
| | - S Alegria
- Cardiology Department, Hospital Garcia de Orta, Almada, Portugal
| | - A Santos
- Radiology Department, Centro Hospitalar de Lisboa Ocidental, Lisboa, Portugal
| | - A C Vieira
- Pulmonology Department, Hospital Garcia de Orta, Almada, Portugal
| | - D Repolho
- Cardiology Department, Hospital Garcia de Orta, Almada, Portugal
| | - S Vitorino
- Cardiology Department, Hospital Garcia de Orta, Almada, Portugal
| | - C Saraiva
- Radiology Department, Centro Hospitalar de Lisboa Ocidental, Lisboa, Portugal
| | - H Pereira
- Cardiology Department, Hospital Garcia de Orta, Almada, Portugal
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4
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Saraiva C, Lopes-Nunes J, Esteves M, Santos T, Vale A, Cristóvão AC, Ferreira R, Bernardino L. CtBP Neuroprotective Role in Toxin-Based Parkinson's Disease Models: From Expression Pattern to Dopaminergic Survival. Mol Neurobiol 2023; 60:4246-4260. [PMID: 37060501 PMCID: PMC10293336 DOI: 10.1007/s12035-023-03331-w] [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: 06/09/2022] [Accepted: 02/07/2023] [Indexed: 04/16/2023]
Abstract
C-terminal binding proteins (CtBP) are transcriptional co-repressors regulating gene expression. CtBP promote neuronal survival through repression of pro-apoptotic genes, and may represent relevant targets for neurodegenerative disorders, such as Parkinson's disease (PD). Nevertheless, evidence of the role of CtBP1 and CtBP2 in neurodegeneration are scarce. Herein, we showed that CtBP1 and CtBP2 are expressed in neurons, dopaminergic neurons, astrocytes, and microglia in the substantia nigra (SN) and striatum of adult mice. Old mice showed a lower expression of CtBP1 in the SN and higher expression of CtPB2 in the SN and striatum compared with adult mice. In vivo models for PD (paraquat, MPTP, 6-OHDA) showed increased expression of CtBP1 in the SN and striatum while CtBP2 expression was increased in the striatum of paraquat-treated rats only. Moreover, an increased expression of both CtBP was found in a dopaminergic cell line (N27) exposed to 6-OHDA. In the 6-OHDA PD model, we found a dual effect using an unspecific ligand of CtBP, the 4-methylthio 2-oxobutyric acid (MTOB): higher concentrations (e.g. 2500 µM, 1000 µM) inhibited dopaminergic survival, while at 250 μM it counteracted cell death. In vitro, this latter protective role was absent after the siRNA silencing of CtBP1 or CtBP2. Altogether, this is the first report exploring the cellular and regional expression pattern of CtBP in the nigrostriatal pathway and the neuroprotective role in PD toxin-based models. CtBP could counteract dopaminergic cell death in the 6-OHDA PD model and, therefore, CtBP function and therapeutic potential in PD should be further explored.
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Affiliation(s)
- Cláudia Saraiva
- Brain Repair Group, Health Sciences Research Center (CICS-UBI), Faculty of Health Sciences, University of Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal
- Present Address: Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, 7 Avenue Des Hauts-Fourneaux, Esch-Sur-Alzette, Luxembourg
| | - Jéssica Lopes-Nunes
- Brain Repair Group, Health Sciences Research Center (CICS-UBI), Faculty of Health Sciences, University of Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal
| | - Marta Esteves
- Brain Repair Group, Health Sciences Research Center (CICS-UBI), Faculty of Health Sciences, University of Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal
| | - Tiago Santos
- Brain Repair Group, Health Sciences Research Center (CICS-UBI), Faculty of Health Sciences, University of Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal
| | - Ana Vale
- Brain Repair Group, Health Sciences Research Center (CICS-UBI), Faculty of Health Sciences, University of Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal
| | - Ana Clara Cristóvão
- Brain Repair Group, Health Sciences Research Center (CICS-UBI), Faculty of Health Sciences, University of Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal
| | - Raquel Ferreira
- Brain Repair Group, Health Sciences Research Center (CICS-UBI), Faculty of Health Sciences, University of Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal
- Present Address: CEDOC, NOVA Medical School|Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, Campo Dos Mártires da Pátria, 130, Lisboa, Portugal
| | - Liliana Bernardino
- Brain Repair Group, Health Sciences Research Center (CICS-UBI), Faculty of Health Sciences, University of Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal
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5
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Rebelo C, Reis T, Guedes J, Saraiva C, Rodrigues AF, Simões S, Bernardino L, Peça J, Pinho SLC, Ferreira L. Author Correction: Efficient spatially targeted gene editing using a near-infrared activatable protein-conjugated nanoparticle for brain applications. Nat Commun 2023; 14:4252. [PMID: 37460468 PMCID: PMC10352242 DOI: 10.1038/s41467-023-39976-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/21/2023] Open
Affiliation(s)
- Catarina Rebelo
- CNC-Center for Neurosciences and Cell Biology, University of Coimbra, Coimbra, Portugal
- Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Tiago Reis
- CNC-Center for Neurosciences and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Joana Guedes
- CNC-Center for Neurosciences and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Cláudia Saraiva
- Health Sciences Research Centre (CICS-UBI), University of Beira Interior, Covilhã, Portugal
| | | | - Susana Simões
- CNC-Center for Neurosciences and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Liliana Bernardino
- Health Sciences Research Centre (CICS-UBI), University of Beira Interior, Covilhã, Portugal
| | - João Peça
- CNC-Center for Neurosciences and Cell Biology, University of Coimbra, Coimbra, Portugal
- Department of Life Sciences, University of Coimbra, Coimbra, Portugal
| | - Sónia L C Pinho
- CNC-Center for Neurosciences and Cell Biology, University of Coimbra, Coimbra, Portugal.
| | - Lino Ferreira
- CNC-Center for Neurosciences and Cell Biology, University of Coimbra, Coimbra, Portugal.
- Faculty of Medicine, University of Coimbra, Coimbra, Portugal.
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Esteves M, Abreu R, Fernandes H, Serra-Almeida C, Martins PAT, Barão M, Cristóvão AC, Saraiva C, Ferreira R, Ferreira L, Bernardino L. MicroRNA-124-3p-enriched small extracellular vesicles as a therapeutic approach for Parkinson's disease. Mol Ther 2022; 30:3176-3192. [PMID: 35689381 PMCID: PMC9552816 DOI: 10.1016/j.ymthe.2022.06.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Revised: 05/10/2022] [Accepted: 06/06/2022] [Indexed: 12/09/2022] Open
Abstract
Parkinson's disease is a neurodegenerative disease characterized by the loss of dopaminergic neurons in the substantia nigra with no effective cure available. MicroRNA-124 has been regarded as a promising therapeutic entity for Parkinson's disease due to its pro-neurogenic and neuroprotective roles. However, its efficient delivery to the brain remains challenging. Here, we used umbilical cord blood mononuclear cell-derived extracellular vesicles as a biological vehicle to deliver microRNA (miR)-124-3p and evaluate its therapeutic effects in a mouse model of Parkinson's disease. In vitro, miR-124-3p-loaded small extracellular vesicles induced neuronal differentiation in subventricular zone neural stem cell cultures and protected N27 dopaminergic cells against 6-hydroxydopamine-induced toxicity. In vivo, intracerebroventricularly administered small extracellular vesicles were detected in the subventricular zone lining the lateral ventricles and in the striatum and substantia nigra, the brain regions most affected by the disease. Most importantly, although miR-124-3p-loaded small extracellular vesicles did not increase the number of new neurons in the 6-hydroxydopamine-lesioned striatum, the formulation protected dopaminergic neurons in the substantia nigra and striatal fibers, which fully counteracted motor behavior symptoms. Our findings reveal a novel promising therapeutic application of small extracellular vesicles as delivery agents for miR-124-3p in the context of Parkinson's disease.
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Affiliation(s)
- Marta Esteves
- Health Sciences Research Centre (CICS-UBI), Faculty of Health Sciences, University of Beira Interior, 6200-506 Covilhã, Portugal
| | - Ricardo Abreu
- Department of Molecular Genetics, Faculty of Sciences and Engineering, Maastricht University, Maastricht 6200, the Netherlands; CNC-Center for Neuroscience and Cell Biology, CIBB-Centre for Innovative Biomedicine and Biotechnology, University of Coimbra, UC, Biotech Parque Tecnológico de Cantanhede, 3060-197 Cantanhede, Portugal
| | - Hugo Fernandes
- CNC-Center for Neuroscience and Cell Biology, CIBB-Centre for Innovative Biomedicine and Biotechnology, University of Coimbra, UC, Biotech Parque Tecnológico de Cantanhede, 3060-197 Cantanhede, Portugal; Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
| | - Catarina Serra-Almeida
- Health Sciences Research Centre (CICS-UBI), Faculty of Health Sciences, University of Beira Interior, 6200-506 Covilhã, Portugal
| | - Patrícia A T Martins
- CNC-Center for Neuroscience and Cell Biology, CIBB-Centre for Innovative Biomedicine and Biotechnology, University of Coimbra, UC, Biotech Parque Tecnológico de Cantanhede, 3060-197 Cantanhede, Portugal
| | - Marta Barão
- CNC-Center for Neuroscience and Cell Biology, CIBB-Centre for Innovative Biomedicine and Biotechnology, University of Coimbra, UC, Biotech Parque Tecnológico de Cantanhede, 3060-197 Cantanhede, Portugal
| | - Ana Clara Cristóvão
- Health Sciences Research Centre (CICS-UBI), Faculty of Health Sciences, University of Beira Interior, 6200-506 Covilhã, Portugal; Neurosov, UBImedical, EM506, University of Beira Interior, Covilhã, Portugal
| | - Cláudia Saraiva
- Health Sciences Research Centre (CICS-UBI), Faculty of Health Sciences, University of Beira Interior, 6200-506 Covilhã, Portugal
| | - Raquel Ferreira
- Health Sciences Research Centre (CICS-UBI), Faculty of Health Sciences, University of Beira Interior, 6200-506 Covilhã, Portugal
| | - Lino Ferreira
- CNC-Center for Neuroscience and Cell Biology, CIBB-Centre for Innovative Biomedicine and Biotechnology, University of Coimbra, UC, Biotech Parque Tecnológico de Cantanhede, 3060-197 Cantanhede, Portugal; Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
| | - Liliana Bernardino
- Health Sciences Research Centre (CICS-UBI), Faculty of Health Sciences, University of Beira Interior, 6200-506 Covilhã, Portugal.
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7
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Gomes D, Reis Santos R, Freitas P, Presume J, Mendes G, Coutinho Santos A, Guerreiro S, Abecasis J, Ribeiras R, Andrade MJ, Campante Teles R, Saraiva C, Mendes M, M Ferreira A. Indexing calcium score of the aortic valve to the annulus area improves the grading of aortic stenosis severity in patients within the grey zone of aortic valve calcification. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.176] [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: 11/14/2022] Open
Abstract
Abstract
Introduction
Calcium score of the aortic valve (CaScAoV) is recommended as a supporting tool to assist in the grading of aortic stenosis (AS) severity when echocardiographic assessment is inconclusive. However, a significant proportion of patients have CaScAoV values within a “grey zone” between the “unlikely” and “likely” thresholds. The purpose of this study was to assess the potential usefulness of indexing CaScAoV to the area of the aortic annulus, in order to improve the discriminative power of CaScAoV in this subset of patients.
Methods
Consecutive patients evaluated at a single center TAVI program were retrospectively identified and included in the analysis if cardiac CT and echocardiography were performed within a 6-month timeframe. Those with LVEF <50%, indexed stroke volume <35 ml/m2, rheumatic heart disease, or bicuspid aortic valves were excluded. Severe AS was defined as mean transvalvular gradient ≥40 mmHg. The likelihood of severe AS assessed by CT was categorized according to the guideline-recommended sex-specific CaScAoV thresholds. Patients were considered to be in the “grey zone” if their CaScAoV values were between 800–1200 for women, and between 1600–2000 for men.
Results
A total of 655 patients were included (282 men (43.1%), median age 83 years [IQR 79–86]). AS was considered severe by echocardiographic criteria in 587 patients (89.6%), and moderate in the remainder. Median transvalvular gradient was 49 mmHg (IQR 43–59), and median CaScAoV values were 3329 (IQR 2356–4500) for men, and 1995 (IQR 1462–2781) for women.
Overall, 77 patients (11.7%) had CaScAoV values in the “grey zone”, of which 24 (31.2%) had moderate AS (Figure 1). Patients within this region of uncertainty were no different form the others in terms of age, sex, annulus size and body surface area.
In this subset of patients, indexing CaScAoV to aortic annulus area showed good discriminative power to identify severe AS (AUC 0.69, 95% CI 0.56–0.81, p=0.008). Using previously established thresholds (>300 AU/cm2 for women and >500 AU/cm2 for men), 48 patients (62.3%) were correctly reclassified (net reclassification index of 0.45, p=0.03). These findings were similar for both sexes.
Conclusion
In patients undergoing cardiac CT for known or suspected severe AS with CaScAoV values within the “grey zone”, indexing CaScAoV to the area of the aortic annulus improves the classification of AS severity and may decrease diagnostic uncertainty.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- D Gomes
- Hospital Santa Cruz , Lisbon , Portugal
| | | | - P Freitas
- Hospital Santa Cruz , Lisbon , Portugal
| | - J Presume
- Hospital Santa Cruz , Lisbon , Portugal
| | - G Mendes
- Hospital Santa Cruz , Lisbon , Portugal
| | | | | | | | | | | | | | - C Saraiva
- Hospital Santa Cruz , Lisbon , Portugal
| | - M Mendes
- Hospital Santa Cruz , Lisbon , Portugal
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8
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Lopes P, Albuquerque F, Freitas P, Goncalves PA, Presume J, Guerreiro S, Abecasis J, Santos AC, Saraiva C, Mendes M, Marques H, Ferreira A. Influence of age on the diagnostic value of coronary artery calcium score for ruling out coronary stenosis in symptomatic patients. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.189] [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: 11/14/2022] Open
Abstract
Abstract
Background
The 2021 Guideline for the Evaluation of Chest Pain supports the use of coronary artery calcium (CAC) score as a reasonable first-line test to identify patients with a low likelihood of obstructive coronary artery disease (CAD) who may not require additional testing (class IIa, LOE B). However, a recent study from a large cohort of Northern European patients raised concerns about the added diagnostic value of CAC=0 in younger patients. The aim of this study was to assess the influence of age on the value of CAC=0 in symptomatic patients undergoing coronary computed tomography angiography (CCTA).
Methods
We conducted a two-center cross-sectional study assessing symptomatic patients with suspected CAD who underwent CAC score and CCTA. Key exclusion criteria were age <30 years, known CAD, suspected acute coronary syndrome, or symptoms other than chest pain or dyspnea. Pretest probability of obstructive CAD was calculated based on age, sex and symptom typicality, according to the guideline-recommended method. Obstructive CAD was defined as any luminal stenosis ≥50% on CCTA. The diagnostic likelihood ratios and negative predictive values (NPV) were used to assess the diagnostic value of a CAC score of 0 to rule out obstructive CAD.
Results
A total of 2043 patients (mean age 60±11 years, 60% women) of whom 990 (48.5%) had a CAC score of 0 were included in the analysis. Symptom characteristics were: 38% non-anginal chest pain, 30% atypical angina, 19% dyspnea, and 13% typical chest pain. Overall, the prevalence of obstructive CAD was 12.8% (n=262). Pretest probability of obstructive CAD increased progressively with age, from 6.0% in patients young than 50 years to 20.7% in those 70 years or older. Contrariwise, the prevalence of patients with a CAC score = 0 decreased from 77% in patients younger than 50 years, to 26% in those who where 70 years or older.
The added diagnostic value of a CAC score = 0 was lower in younger patients, with negative likelihood ratios ranging from 0.36 (64% decrease in the likelihood of CAD) in patients younger than 50 years, to 0.09 and 0.10 (∼90% decrease in the likelihood of CAD) in those aged 60–69 years and 70 years or older, respectively – Figure 1.
Despite this, the prevalence of obstructive CAD among patients with a CAC score = 0 was low across all age groups: 2.4% (i.e., NPV = 97.6%) in those younger than 50 years, 3.0% (NPV = 97.0%) among those aged 50–59 years, 1.5% (NPV = 98.5%) in patients between 60 and 69 years, and 2.0% (NPV = 98.0%) among those 70 years or older.
Conclusions
In a cohort of symptomatic patients undergoing CCTA for suspected CAD, the added diagnostic value of a CAC score of zero decreases significantly at younger ages. However, this “diminishing return” of CAC in younger patients if offset by their lower pretest probabilities, yielding high negative predictive values independently of age.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- P Lopes
- Hospital Santa Cruz , Carnaxide , Portugal
| | | | - P Freitas
- Hospital Santa Cruz , Carnaxide , Portugal
| | - P A Goncalves
- UNICA – Cardiovascular CT and MR Unit, Hospital da Luz , Lisbon , Portugal
| | - J Presume
- Hospital Santa Cruz , Carnaxide , Portugal
| | | | - J Abecasis
- Hospital Santa Cruz , Carnaxide , Portugal
| | - A C Santos
- Hospital Santa Cruz , Carnaxide , Portugal
| | - C Saraiva
- Hospital Santa Cruz , Carnaxide , Portugal
| | - M Mendes
- Hospital Santa Cruz , Carnaxide , Portugal
| | - H Marques
- UNICA – Cardiovascular CT and MR Unit, Hospital da Luz , Lisbon , Portugal
| | - A Ferreira
- Hospital Santa Cruz , Carnaxide , Portugal
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Paiva M, Gomes D, Freitas P, Presume P, Santos R, Lopes P, Matos D, Guerreiro S, Abecasis J, Santos A, Saraiva C, Mendes M, Ferreira A. Use of coronary calcium score to refine the cardiovascular risk classification of the new SCORE2 and SCORE2-OP algorithms in patients undergoing coronary CT angiography. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.194] [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
Introduction
Recently, the European Society of Cardiology issued new algorithms (SCORE-2 and SCORE2-OP) to estimate the 10-year risk of atherosclerotic cardiovascular disease (ASCVD). CACS has been shown to reclassify a significant proportion of patients when applied on top of several scores, but data on its use with these new algorithms are lacking.
The aim of this study was to assess the risk reassignment that can be attained by using CACS as a risk modifier of the SCORE-2 / SCORE2-OP classification, in patients referred for coronary CT angiography (CCTA).
Methods
Individuals without diabetes or known ASCVD were included in a single center registry of patients undergoing CCTA for suspected coronary artery disease (CAD). The 10-year risk of cardiovascular disease was calculated for each patient using SCORE-2 (ages 40–69) or SCORE2-OP (ages 70–89), and categorised as low-to-moderate, high, or very-high risk, according to guideline-recommended age-specific thresholds. CACS was considered to reclassify risk one level downward if = 0 in high or very-high risk patients, and reclassify risk upward if >100 (or >75th percentile) in those with low-to-moderate risk, or >1000 in those with high-risk.
Results
A total of 529 patients (43% men, mean age 63±10 years) were included, of which 13% (n=69) were active smokers. The mean systolic blood pressure and non-HDL-C values were 137±18 mmHg and 140±37 mg/dL, respectively.
A total of 47 patients (9%) had obstructive CAD on CCTA, classifying them as very-high risk. In the remainder 482 patients without obstructive CAD, the median CACS was 8 (IQR 0–80 AU), with 194 patients (40%) having CACS = 0, and 111 (23%) presenting CACS values ≥100.
The proportion of patients classified as low-to-moderate risk, high risk, and very high risk was 36%, 46% and 19% using the SCORE-2 / SCORE2-OP algorithm.
Using CACS would reclassify 150 patients (31%): 107 patients (22%) downward, and 43 patients (9%) upward. The extent of risk reclassification conveyed by CACS was 33% in patients assessed with SCORE-2, and 25% with SCORE-2 OP (p=0.082). Overall, most of the risk reassignment (42%, n=93) would occur in patients originally classified as high-risk – Fig. 1.
At the time of testing, 32% (n=61) of patients with CACS = 0 were being treated with statins, whereas 52% (n=58) of those with CACS ≥100 were not.
Conclusion
Even when the most recent SCORE-2 / SCORE-2 OP algorithms are used, risk refinement with CACS leads to the reclassification of nearly one third of the patients undergoing CCTA, mostly from downgrading risk. This opportunistic use of CACS may be employed to improve the allocation of primary prevention therapies.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- M Paiva
- Centro Hospitalar de Lisboa Ocidental , Lisbon , Portugal
| | - D Gomes
- Centro Hospitalar de Lisboa Ocidental , Lisbon , Portugal
| | - P Freitas
- Centro Hospitalar de Lisboa Ocidental , Lisbon , Portugal
| | - P Presume
- Centro Hospitalar de Lisboa Ocidental , Lisbon , Portugal
| | - R Santos
- Centro Hospitalar de Lisboa Ocidental , Lisbon , Portugal
| | - P Lopes
- Centro Hospitalar de Lisboa Ocidental , Lisbon , Portugal
| | - D Matos
- Centro Hospitalar de Lisboa Ocidental , Lisbon , Portugal
| | - S Guerreiro
- Centro Hospitalar de Lisboa Ocidental , Lisbon , Portugal
| | - J Abecasis
- Centro Hospitalar de Lisboa Ocidental , Lisbon , Portugal
| | - A Santos
- Centro Hospitalar de Lisboa Ocidental , Lisbon , Portugal
| | - C Saraiva
- Centro Hospitalar de Lisboa Ocidental , Lisbon , Portugal
| | - M Mendes
- Centro Hospitalar de Lisboa Ocidental , Lisbon , Portugal
| | - A Ferreira
- Centro Hospitalar de Lisboa Ocidental , Lisbon , Portugal
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10
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Lopes P, Albuquerque F, Goncalves PA, Presume J, Freitas P, Guerreiro S, Abecasis J, Santos AC, Saraiva C, Mendes M, Marques H, Ferreira A. Implications of the North American 2021 Chest Pain guidelines in the diagnostic approach to patients with stable chest pain and low pretest probability of obstructive coronary artery disease. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.188] [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: 11/14/2022] Open
Abstract
Abstract
Background
The North American 2021 Chest Pain Guidelines recommend not testing stable patients with low pretest likelihood of obstructive coronary artery disease (CAD), defined as pretest probability <15% using contemporary models (Class I recommendation). In selected cases among this subset of patients, coronary artery calcium (CAC) score is considered a “reasonable first-line test” (Class IIa). Despite some supporting evidence, the clinical implications of a widespread adoption of these recommendations remain unclear.
The purpose of this study was to assess the results of three different testing strategies for patients with pretest probability <15%: A) defer testing; B) perform CAC score and withhold further testing if = 0, and proceed to coronary CT angiography (CCTA) if >0; C) perform CCTA in all.
Methods
We conducted a two-center cross-sectional study assessing symptomatic patients with suspected CAD who underwent CAC score and CCTA. Patients with known CAD, suspected acute coronary syndrome, or symptoms other than chest pain or dyspnea were excluded. Pretest probability of obstructive CAD was calculated based on age, sex and symptom typicality. Obstructive CAD was defined as any luminal stenosis ≥50% on CCTA.
Results
A total of 2259 patients were screened, of which 1385 (61.3%) had pretest probability <15% and were included in the analysis (mean age 57±11 years, 79% women). Symptom characteristics were: 48% non-anginal chest pain, 26% atypical angina, 21% dyspnea, and 5% typical chest pain. Overall, the prevalence of obstructive CAD was 10.3% (n=142). In the 786 patients (56.6%) with a CAC score of 0, 8.5% (n=67) had some degree of CAD [1.9% (n=15) obstructive, and 6.6% (n=52) nonobstructive]. Among those with CAC >0 (n=599), 21.2% (n=127) had obstructive CAD. The results that would be reached with each of the 3 diagnostic strategies are presented in Figure 1. The number of patients needed to scan with strategy B (CAC as gatekeeper) vs. A (no testing) to identify one patient with obstructive CAD was 11, whereas the number needed to scan with strategy C (CCTA for all) vs. strategy B was 91.
Conclusions
Not testing patients with suspected CAD and pretest likelihood <15% would lead to missing obstructive CAD in 1 out of 10 patients. Using CAC as a gatekeeper in this subgroup would decrease the use of CCTA by more than 50%, at the cost of missing obstructive CAD in 1 out of 100 patients. These findings may be used to inform decisions on testing, which will ultimately depend on how much diagnostic uncertainty and missed diagnoses patients and their physicians are willing to accept.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- P Lopes
- Hospital Santa Cruz , Carnaxide , Portugal
| | | | - P A Goncalves
- UNICA – Cardiovascular CT and MR Unit, Hospital da Luz , Lisbon , Portugal
| | - J Presume
- Hospital Santa Cruz , Carnaxide , Portugal
| | - P Freitas
- Hospital Santa Cruz , Carnaxide , Portugal
| | | | - J Abecasis
- Hospital Santa Cruz , Carnaxide , Portugal
| | - A C Santos
- Hospital Santa Cruz , Carnaxide , Portugal
| | - C Saraiva
- Hospital Santa Cruz , Carnaxide , Portugal
| | - M Mendes
- Hospital Santa Cruz , Carnaxide , Portugal
| | - H Marques
- UNICA – Cardiovascular CT and MR Unit, Hospital da Luz , Lisbon , Portugal
| | - A Ferreira
- Hospital Santa Cruz , Carnaxide , Portugal
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11
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Lopes Da Cunha GJ, Rocha B, Sousa J, Maltes S, Brizido C, Strong C, Guerreiro S, Abecasis J, Andrade MJ, Aguiar C, Saraiva C, Freitas P, Mendes M, Ferreira A. Looking beyond left ventricular ejection fraction – a new multiparametric CMR score to refine the prognostic assessment of HF patients. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.850] [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: 11/14/2022] Open
Abstract
Abstract
Background
Cardiac magnetic resonance (CMR) is recommended in Heart Failure (HF) to assess myocardial structure and function. Recently, the quantification of pulmonary congestion and skeletal muscle mass using CMR have been shown to predict adverse events in HF, but a tool integrating this information is currently unavailable. The purpose of this study was to develop and test a new multiparametric CMR-derived score.
Methods
We conducted a single-center retrospective study of consecutive HF patients with left ventricular ejection fraction (LVEF) <50% who underwent CMR. Several CMR parameters with known prognostic value were assessed, including: LVEF, Lung Water Density (LWD), Pectoralis Major Muscle (PMM) area, and presence of Late Gadolinium Enhancement. PMM area was outlined at the level of the carina – Figure 1A, B – and LWD was defined as the lung-to-liver signal ratio multiplied by 0.7, as previously described. Both parameters were measured in standard HASTE images - Figure 1C. The primary endpoint was a composite of all-cause death or HF hospitalization. Using the Cox regression Hazard Ratios of designated variables, a risk score was developed.
Results
Overall, 436 patients were included. During a median follow-up of 27 (17–37) months, 43 (9.9%) patients died and 57 (13.2%) had at least one hospitalization for HF. LVEF, LWD and PMM were independent predictors of the primary endpoint and were included in the CMR-HF score – Figure 2. The annual rate of events increased from 4.7 to 7.5 and 20.0% from lowest to highest tertile of the score. Roughly half of the events (54%) occurred in patients in the highest tertile of the CMR-HF score. In multivariate analysis, the new score independently predicted the primary endpoint (HR per 5 points: 1.54; 95% CI: 1.21–1.97; p<0.001) even after adjustment for age, body mass index, NYHA class, NT-proBNP, estimated glomerular filtration rate, presence of implantable cardioverter-defibrillator, and ischemic etiology.
Conclusions
This novel multidimensional CMR-HF score, combining easily obtainable data on left ventricular pump failure, lung congestion and muscular wasting, is a promising tool identifying HF patients with an LVEF <50% at higher risk of death or HF hospitalization.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
| | - B Rocha
- Hospital Santa Cruz , Lisbon , Portugal
| | - J Sousa
- Hospital Santa Cruz , Lisbon , Portugal
| | - S Maltes
- Hospital Santa Cruz , Lisbon , Portugal
| | - C Brizido
- Hospital Santa Cruz , Lisbon , Portugal
| | - C Strong
- Hospital Santa Cruz , Lisbon , Portugal
| | | | | | | | - C Aguiar
- Hospital Santa Cruz , Lisbon , Portugal
| | - C Saraiva
- Hospital Santa Cruz , Lisbon , Portugal
| | - P Freitas
- Hospital Santa Cruz , Lisbon , Portugal
| | - M Mendes
- Hospital Santa Cruz , Lisbon , Portugal
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12
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Sabate-Soler S, Nickels SL, Saraiva C, Berger E, Dubonyte U, Barmpa K, Lan YJ, Kouno T, Jarazo J, Robertson G, Sharif J, Koseki H, Thome C, Shin JW, Cowley SA, Schwamborn JC. Microglia integration into human midbrain organoids leads to increased neuronal maturation and functionality. Glia 2022; 70:1267-1288. [PMID: 35262217 PMCID: PMC9314680 DOI: 10.1002/glia.24167] [Citation(s) in RCA: 33] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 02/25/2022] [Accepted: 02/28/2022] [Indexed: 01/29/2023]
Abstract
The human brain is a complex, three-dimensional structure. To better recapitulate brain complexity, recent efforts have focused on the development of human-specific midbrain organoids. Human iPSC-derived midbrain organoids consist of differentiated and functional neurons, which contain active synapses, as well as astrocytes and oligodendrocytes. However, the absence of microglia, with their ability to remodel neuronal networks and phagocytose apoptotic cells and debris, represents a major disadvantage for the current midbrain organoid systems. Additionally, neuroinflammation-related disease modeling is not possible in the absence of microglia. So far, no studies about the effects of human iPSC-derived microglia on midbrain organoid neural cells have been published. Here we describe an approach to derive microglia from human iPSCs and integrate them into iPSC-derived midbrain organoids. Using single nuclear RNA Sequencing, we provide a detailed characterization of microglia in midbrain organoids as well as the influence of their presence on the other cells of the organoids. Furthermore, we describe the effects that microglia have on cell death and oxidative stress-related gene expression. Finally, we show that microglia in midbrain organoids affect synaptic remodeling and increase neuronal excitability. Altogether, we show a more suitable system to further investigate brain development, as well as neurodegenerative diseases and neuroinflammation.
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Affiliation(s)
- Sonia Sabate-Soler
- Luxembourg Centre for Systems Biomedicine (LCSB), Developmental and Cellular Biology, University of Luxembourg, Belvaux, Luxembourg
| | - Sarah Louise Nickels
- Luxembourg Centre for Systems Biomedicine (LCSB), Developmental and Cellular Biology, University of Luxembourg, Belvaux, Luxembourg
| | - Cláudia Saraiva
- Luxembourg Centre for Systems Biomedicine (LCSB), Developmental and Cellular Biology, University of Luxembourg, Belvaux, Luxembourg
| | - Emanuel Berger
- Luxembourg Centre for Systems Biomedicine (LCSB), Developmental and Cellular Biology, University of Luxembourg, Belvaux, Luxembourg
| | - Ugne Dubonyte
- Luxembourg Centre for Systems Biomedicine (LCSB), Developmental and Cellular Biology, University of Luxembourg, Belvaux, Luxembourg
| | - Kyriaki Barmpa
- Luxembourg Centre for Systems Biomedicine (LCSB), Developmental and Cellular Biology, University of Luxembourg, Belvaux, Luxembourg
| | - Yan Jun Lan
- Center for Integrative Medical Sciences, RIKEN, Yokohama, Kanagawa, Japan.,ETH Zurich, Institute of Pharmaceutical Sciences, Zurich, Switzerland
| | - Tsukasa Kouno
- Center for Integrative Medical Sciences, RIKEN, Yokohama, Kanagawa, Japan
| | - Javier Jarazo
- Luxembourg Centre for Systems Biomedicine (LCSB), Developmental and Cellular Biology, University of Luxembourg, Belvaux, Luxembourg.,OrganoTherapeutics SARL-S, Esch-sur-Alzette, Luxembourg
| | - Graham Robertson
- Luxembourg Centre for Systems Biomedicine (LCSB), Developmental and Cellular Biology, University of Luxembourg, Belvaux, Luxembourg
| | - Jafar Sharif
- Center for Integrative Medical Sciences, RIKEN, Yokohama, Kanagawa, Japan
| | - Haruhiko Koseki
- Center for Integrative Medical Sciences, RIKEN, Yokohama, Kanagawa, Japan
| | - Christian Thome
- Institute of Physiology and Pathophysiology, Heidelberg University, Heidelberg, Germany
| | - Jay W Shin
- Center for Integrative Medical Sciences, RIKEN, Yokohama, Kanagawa, Japan
| | - Sally A Cowley
- Oxford Parkinson's Disease Centre, James Martin Stem Cell Facility, Sir William Dunn School of Pathology, University of Oxford, Oxford, UK
| | - Jens C Schwamborn
- Luxembourg Centre for Systems Biomedicine (LCSB), Developmental and Cellular Biology, University of Luxembourg, Belvaux, Luxembourg
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13
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Lopes P, Albuquerque F, Freitas P, Gonçalves P, Presume J, Guerreiro S, Abecasis J, Santos A, Saraiva C, Mendes M, Marques H, Ferreira A. 494 Influence Of Age On The Diagnostic Value Of Coronary Artery Calcium Score For Ruling Out Coronary Stenosis In Symptomatic Patients. J Cardiovasc Comput Tomogr 2022. [DOI: 10.1016/j.jcct.2022.06.105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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14
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Paiva M, Santos R, Freitas P, Gomes D, Presume J, Lopes P, Matos D, Guerreiro S, Santos A, Saraiva C, Mendes M, Ferreira A. 461 Use Of Coronary Calcium Score To Refine The Cardiovascular Risk Classification Of The New Score-2 And Score-2 Op Algorithms In Patients Undergoing Coronary Ct Angiography. J Cardiovasc Comput Tomogr 2022. [DOI: 10.1016/j.jcct.2022.06.066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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15
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Paiva M, Gomes D, Freitas P, Presume J, Santos R, Lopes P, Matos D, Guerreiro S, Abecasis J, Santos A, Saraiva C, Mendes M, Ferreira A. 468 Potential Impact Of Replacing Score With Score-2 On Risk Classification And Statin Eligibility - A Coronary Calcium Score Correlation Study. J Cardiovasc Comput Tomogr 2022. [DOI: 10.1016/j.jcct.2022.06.079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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16
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Zare I, Yaraki MT, Speranza G, Najafabadi AH, Haghighi AS, Nik AB, Manshian BB, Saraiva C, Soenen SJ, Kogan MJ, Lee JW, Apollo NV, Bernardino L, Araya E, Mayer D, Mao G, Hamblin MR. Gold nanostructures: synthesis, properties, and neurological applications. Chem Soc Rev 2022; 51:2601-2680. [PMID: 35234776 DOI: 10.1039/d1cs01111a] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Recent advances in technology are expected to increase our current understanding of neuroscience. Nanotechnology and nanomaterials can alter and control neural functionality in both in vitro and in vivo experimental setups. The intersection between neuroscience and nanoscience may generate long-term neural interfaces adapted at the molecular level. Owing to their intrinsic physicochemical characteristics, gold nanostructures (GNSs) have received much attention in neuroscience, especially for combined diagnostic and therapeutic (theragnostic) purposes. GNSs have been successfully employed to stimulate and monitor neurophysiological signals. Hence, GNSs could provide a promising solution for the regeneration and recovery of neural tissue, novel neuroprotective strategies, and integrated implantable materials. This review covers the broad range of neurological applications of GNS-based materials to improve clinical diagnosis and therapy. Sub-topics include neurotoxicity, targeted delivery of therapeutics to the central nervous system (CNS), neurochemical sensing, neuromodulation, neuroimaging, neurotherapy, tissue engineering, and neural regeneration. It focuses on core concepts of GNSs in neurology, to circumvent the limitations and significant obstacles of innovative approaches in neurobiology and neurochemistry, including theragnostics. We will discuss recent advances in the use of GNSs to overcome current bottlenecks and tackle technical and conceptual challenges.
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Affiliation(s)
- Iman Zare
- Research and Development Department, Sina Medical Biochemistry Technologies Co. Ltd., Shiraz 7178795844, Iran
| | | | - Giorgio Speranza
- CMM - FBK, v. Sommarive 18, 38123 Trento, Italy.,IFN - CNR, CSMFO Lab., via alla Cascata 56/C Povo, 38123 Trento, Italy.,Department of Industrial Engineering, University of Trento, v. Sommarive 9, 38123 Trento, Italy
| | - Alireza Hassani Najafabadi
- Terasaki Institute for Biomedical Innovation (TIBI), Los Angeles, CA 90064, USA.,Department of Pharmaceutical Sciences, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Alireza Shourangiz Haghighi
- Department of Mechanical Engineering, Shiraz University of Technology, Modarres Boulevard, 13876-71557, Shiraz, Iran
| | - Amirala Bakhshian Nik
- Department of Biomedical Engineering, Florida International University, Miami, FL 33174, USA
| | - Bella B Manshian
- Translational Cell and Tissue Research Unit, Department of Imaging and Pathology, KU Leuven, Herestraat 49, B3000 Leuven, Belgium
| | - Cláudia Saraiva
- Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, 7 Avenue des Hauts-Fourneaux, 4362 Esch-sur-Alzette, Luxembourg.,Health Sciences Research Centre (CICS-UBI), University of Beira Interior, Rua Marques d'Avila e Bolama, 6201-001 Covilha, Portugal
| | - Stefaan J Soenen
- NanoHealth and Optical Imaging Group, Department of Imaging and Pathology, KU Leuven, Herestraat 49, B3000 Leuven, Belgium
| | - Marcelo J Kogan
- Advanced Center for Chronic Diseases (ACCDiS), Facultad de Ciencias Químicas y Farmacéuticas, Departamento de Química Farmacológica y Toxicológica, Universidad de Chile, 8380492 Santiago, Chile
| | - Jee Woong Lee
- Department of Medical Sciences, Clinical Neurophysiology, Uppsala University, Uppsala, SE-751 23, Sweden
| | - Nicholas V Apollo
- Center for Neuroengineering and Therapeutics, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.,School of Physics, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Liliana Bernardino
- Health Sciences Research Centre (CICS-UBI), University of Beira Interior, Rua Marques d'Avila e Bolama, 6201-001 Covilha, Portugal
| | - Eyleen Araya
- Departamento de Ciencias Quimicas, Facultad de Ciencias Exactas, Universidad Andres Bello, Av. Republica 275, Santiago, Chile
| | - Dirk Mayer
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, Germany
| | - Guangzhao Mao
- School of Chemical Engineering, University of New South Wales (UNSW Sydney), Sydney, NSW 2052, Australia
| | - Michael R Hamblin
- Laser Research Center, University of Johannesburg, Doorfontein 2028, South Africa.
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17
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Machado-Pereira M, Saraiva C, Bernardino L, Cristóvão AC, Ferreira R. Argonaute-2 protects the neurovascular unit from damage caused by systemic inflammation. J Neuroinflammation 2022; 19:11. [PMID: 34991639 PMCID: PMC8740421 DOI: 10.1186/s12974-021-02324-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [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: 08/13/2021] [Accepted: 11/12/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The brain vasculature plays a pivotal role in the inflammatory process by modulating the interaction between blood cells and the neurovascular unit. Argonaute-2 (Ago2) has been suggested as essential for endothelial survival but its role in the brain vasculature or in the endothelial-glial crosstalk has not been addressed. Thus, our aim was to clarify the significance of Ago2 in the inflammatory responses elicited by these cell types. METHODS Mouse primary cultures of brain endothelial cells, astrocytes and microglia were used to evaluate cellular responses to the modulation of Ago2. Exposure of microglia to endothelial cell-conditioned media was used to assess the potential for in vivo studies. Adult mice were injected intraperitoneally with lipopolysaccharide (LPS) (2 mg/kg) followed by three daily intraperitoneal injections of Ago2 (0.4 nM) to assess markers of endothelial disruption, glial reactivity and neuronal function. RESULTS Herein, we demonstrated that LPS activation disturbed the integrity of adherens junctions and downregulated Ago2 in primary brain endothelial cells. Exogenous treatment recovered intracellular Ago2 above control levels and recuperated vascular endothelial-cadherin expression, while downregulating LPS-induced nitric oxide release. Primary astrocytes did not show a significant change in Ago2 levels or response to the modulation of the Ago2 system, although endogenous Ago2 was shown to be critical in the maintenance of tumor necrosis factor-α basal levels. LPS-activated primary microglia overexpressed Ago2, and Ago2 silencing contained the inflammatory response to some extent, preventing interleukin-6 and nitric oxide release. Moreover, the secretome of Ago2-modulated brain endothelial cells had a protective effect over microglia. The intraperitoneal injection of LPS impaired blood-brain barrier and neuronal function, while triggering inflammation, and the subsequent systemic administration of Ago2 reduced or normalized endothelial, glial and neuronal markers of LPS damage. This outcome likely resulted from the direct action of Ago2 over the brain endothelium, which reestablished glial and neuronal function. CONCLUSIONS Ago2 could be regarded as a putative therapeutic agent, or target, in the recuperation of the neurovascular unit in inflammatory conditions.
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Affiliation(s)
- Marta Machado-Pereira
- Health Sciences Research Centre (CICS-UBI), University of Beira Interior, Rua Marquês d’Ávila e Bolama, 6201-001 Covilhã, Portugal
| | - Cláudia Saraiva
- Health Sciences Research Centre (CICS-UBI), University of Beira Interior, Rua Marquês d’Ávila e Bolama, 6201-001 Covilhã, Portugal
- Present Address: Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, 7 Avenue des Hauts-Fourneaux, 4362 Esch-sur-Alzette, Luxembourg
| | - Liliana Bernardino
- Health Sciences Research Centre (CICS-UBI), University of Beira Interior, Rua Marquês d’Ávila e Bolama, 6201-001 Covilhã, Portugal
| | - Ana C. Cristóvão
- Health Sciences Research Centre (CICS-UBI), University of Beira Interior, Rua Marquês d’Ávila e Bolama, 6201-001 Covilhã, Portugal
- NeuroSoV, UBImedical, EM506, University of Beira Interior, Covilhã, Portugal
| | - Raquel Ferreira
- Health Sciences Research Centre (CICS-UBI), University of Beira Interior, Rua Marquês d’Ávila e Bolama, 6201-001 Covilhã, Portugal
- CEDOC, NOVA Medical School|Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, Campo dos Mártires da Pátria, 130, 1169-056 Lisboa, Portugal
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18
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Lopes P, Presume J, Goncalves PA, Albuquerque F, Freitas P, Guerreiro S, Abecasis J, Santos AC, Saraiva C, Mendes M, Marques H, Ferreira A. Incorporating coronary calcification into pretest assessment of the likelihood of coronary artery disease: validation and recalibration of a new diagnostic tool. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.0205] [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
Background
A new clinical tool was recently proposed to improve the estimation of pre-test probability of obstructive coronary artery disease (CAD) by incorporating coronary artery calcium score (CACS) with clinical risk factors. This new model (Clinical+CACS) showed improved prediction when compared to the method recommended by the 2019 ESC guidelines on chronic coronary syndromes, but was never tested or adjusted for use in our population. The aim of this study was to assess the performance of this new method in a Portuguese cohort of symptomatic patients referred for coronary computed tomography angiography (CCTA), and to recalibrate it if necessary.
Methods
We conducted a two-center cross-sectional study assessing symptomatic patients who underwent CCTA for suspected CAD. Key exclusion criteria were age <30 years, known CAD, suspected acute coronary syndrome, or symptoms other than chest pain or dyspnea. Obstructive CAD was defined as any luminal stenosis ≥50% on CCTA. The Clinical+CACS prediction model was assessed for discrimination and calibration. A logistical recalibration of the model was conducted in a random sample of 50% of the patients and subsequently validated in the other half.
Results
A total of 1910 patients (mean age 60±11 years, 60% women) were included in the analysis. Symptom characteristics were: 39% non-anginal chest pain, 30% atypical angina, 19% dyspnea and 12% typical angina. The observed prevalence of obstructive CAD was 12.9% (n=247). Patients with obstructive CAD were more often male, were significantly older, had higher prevalence of typical angina and cardiovascular risk factors, and higher CACS values. The new Clinical+CACS tool showed greater discriminative power than the ESC 2019 prediction model, with a C-statistic of 0.83 (CI 95% 0.81–0.86) versus 0.67 (CI 95% 0.64–0.71), respectively (p-value for comparison <0.001). Before recalibration, the Clinical+CACS model underestimated the likelihood of CAD in our population across all quartiles of pretest probability (mean relative underestimation of 49%), which was subsequently corrected by the recalibration procedure - Figure.
Conclusions
In a Portuguese cohort of symptomatic patients undergoing CCTA for suspected CAD, the new Clinical+CACS model showed better discrimination power than the 2019 ESC method. The underestimation of the Clinical+CACS model was corrected by recalibrating it for our population. This new tool might prove useful for guiding decisions on the need for further testing.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- P Lopes
- Hospital Santa Cruz, Carnaxide, Portugal
| | - J Presume
- Hospital Santa Cruz, Carnaxide, Portugal
| | - P A Goncalves
- UNICA – Cardiovascular CT and MR Unit, Hospital da Luz, Lisbon, Portugal
| | | | - P Freitas
- Hospital Santa Cruz, Carnaxide, Portugal
| | | | - J Abecasis
- Hospital Santa Cruz, Carnaxide, Portugal
| | - A C Santos
- Hospital Santa Cruz, Carnaxide, Portugal
| | - C Saraiva
- Hospital Santa Cruz, Carnaxide, Portugal
| | - M Mendes
- Hospital Santa Cruz, Carnaxide, Portugal
| | - H Marques
- UNICA – Cardiovascular CT and MR Unit, Hospital da Luz, Lisbon, Portugal
| | - A Ferreira
- Hospital Santa Cruz, Carnaxide, Portugal
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19
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Lopes P, Freitas P, Ferreira A, Sousa JA, Rocha B, Cunha G, Cavaco D, Abecasis J, Carmo P, Saraiva C, Morgado F, Chotalal D, Feliciano S, Mendes M, Adragao P. The gray zone of myocardial fibrosis is a better predictor of ventricular arrhythmias than total myocardial fibrosis in patients with previous myocardial infarction. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.0216] [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
Background
Current sudden cardiac death (SCD) risk stratification relies heavily on the assessment of left ventricular ejection fraction (LVEF), but markers that could refine risk assessment are needed. Total fibrosis mass (TFM) and “gray zone” of myocardial fibrosis (GZF) on late gadolinium enhancement cardiac magnetic resonance (LGE-CMR) have been proposed as potential arrhythmogenic substrates. The aim of our study was to determine whether TFM and GZF can predict the occurrence of ventricular arrhythmias in patients with previous myocardial infarction.
Methods
We performed a single centre retrospective study enrolling all consecutive patients with previous myocardial infarction undergoing LGE-CMR before implantable cardioverter-defibrillator (ICD) implantation for primary or secondary prevention. TFM and GZF were defined as myocardial tissue with signal-intensities >6 SD and 2–6 SD above the mean of reference myocardium, respectively. The primary endpoint was a composite of sudden arrhythmic death, appropriate ICD shock, ventricular fibrillation (VF), or sustained ventricular tachycardia (VT) as detected by the device.
Results
A total of 55 patients (mean age 62±12 years, 87% male, mean LVEF 30% ± 8%) were included. During a mean follow-up period of 34±15 months, 10 patients reached the primary endpoint (8 appropriate ICD shock, 2 sustained VT or VF). Patients who attained the primary endpoint had similar TFM (28.6g ± 14.5 vs. 23.1g ± 14.5; P=0.283) but larger GZF (25.3g ± 11.0 vs 15.6g ± 7.3; P=0.001). After adjustment for LVEF, GZF remained independently associated with the composite arrhythmic endpoint (adjusted hazard ratio [aHR]: 1.10; 95% CI: 1.03–1.17; P=0.005), whereas TFM did not (aHR: 1.02; 95% CI: 0.98–1.06; P=0.394). Decision tree analysis identified 16.4g of GZF as the best cut-off to predict life-threatening arrhythmic events. The primary endpoint occurred in 9 out of the 22 patients (41%) with GZF >16.4g, but in only 1 of the 33 patients (3%) with GZF ≤16.4g – Figure.
Conclusions
The extent of GZF seems to be a better predictor of ventricular arrhythmias than TFM. This LGE-CMR parameter may be useful to identify a subgroup of patients with previous myocardial infarction at an increased risk of life-threatening arrhythmic events.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- P Lopes
- Hospital Santa Cruz, Carnaxide, Portugal
| | - P Freitas
- Hospital Santa Cruz, Carnaxide, Portugal
| | - A Ferreira
- Hospital Santa Cruz, Carnaxide, Portugal
| | - J A Sousa
- Hospital Santa Cruz, Carnaxide, Portugal
| | - B Rocha
- Hospital Santa Cruz, Carnaxide, Portugal
| | - G Cunha
- Hospital Santa Cruz, Carnaxide, Portugal
| | - D Cavaco
- Hospital Santa Cruz, Carnaxide, Portugal
| | - J Abecasis
- Hospital Santa Cruz, Carnaxide, Portugal
| | - P Carmo
- Hospital Santa Cruz, Carnaxide, Portugal
| | - C Saraiva
- Hospital Santa Cruz, Carnaxide, Portugal
| | - F Morgado
- Hospital Santa Cruz, Carnaxide, Portugal
| | - D Chotalal
- Hospital Santa Cruz, Carnaxide, Portugal
| | | | - M Mendes
- Hospital Santa Cruz, Carnaxide, Portugal
| | - P Adragao
- Hospital Santa Cruz, Carnaxide, Portugal
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20
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Albuquerque F, M Lopes P, Freitas P, Presume J, Gomes D, Abecassis J, Guerreiro S, Santos A, Saraiva C, Mendes M, M Ferreira A. Coronary artery calcium score to predict coronary CT angiography interpretability. An old problem revisited. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.0187] [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: 11/15/2022] Open
Abstract
Abstract
Introduction
Clinical guidelines recommend against the use of coronary computed tomography angiography (CCTA) in patients with heavy calcification due to interpretability concerns, but no specific approach or threshold is provided. Recently, alternative methods have been proposed as more reliable predictors of CCTA interpretability than the classic coronary artery calcium score (CACS). The purpose this study was to compare the performance of different measures of coronary calcification as predictors of CCTA interpretability.
Methods
We conducted a retrospective analysis of consecutive patients undergoing CACS and CCTA between 2018 and 2020. The key exclusion criteria were known coronary artery disease, CACS of zero, and presence of non-assessable coronary lesions for reasons other than calcification (movement/gating artifacts or vessel diameter <2mm). CCTA studies were considered non-interpretable if the main reader considered one or more coronary lesions non-assessable due to calcification. Three different measures of coronary calcification were compared using ROC curve analysis: 1) total CACS; 2) CACS-to-lesion ratio (total CACS divided by the number of calcified plaques); and 3) calcium score of the most calcified plaque. Decision-tree analysis was performed to identify the algorithm that best predicts CCTA interpretability.
Results
A total of 432 patients (191 women, mean age 64±11 years) were included. Overall, 31 patients (7.2%) had a non-interpretable CCTA due to calcification. Patients with non-interpretable CCTA had higher CACS (median 589 vs. 50 AU, p<0.001), higher CACS-to-lesion ratio (median 43 vs. 14 AU/lesion, p<0.001), and higher score of the most calcified plaque (median 445 vs. 43 AU, p<0.001). Among the 3 methods, CACS showed the highest discriminative power to predict a non-interpretable CCTA (C-statistic 0.93, 95% CI 0.89–0.95, p<0.001) – Figure 1.
Decision-tree analysis identified a single-variable algorithm (CACS value ≤515 AU) as the best discriminator of CCTA interpretability: 396 of the 409 patients (97%) with CACS ≤515 AU had an interpretable CCTA, whereas only 5 of the 23 patients (22%) with CACS >515 AU had an interpretable test, yielding a total of 96% correct predictions.
Conclusions
The recently proposed and more complex measures of coronary calcification seem unable to outperform total CACS as a predictor of CCTA interpretability. A simple CACS cutoff-value around 500 AU remains the best discriminator for this purpose.
Funding Acknowledgement
Type of funding sources: None. Figure 1
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Affiliation(s)
| | - P M Lopes
- Hospital Santa Cruz, Carnaxide, Portugal
| | - P Freitas
- Hospital Santa Cruz, Carnaxide, Portugal
| | - J Presume
- Hospital Santa Cruz, Carnaxide, Portugal
| | - D Gomes
- Hospital Santa Cruz, Carnaxide, Portugal
| | | | | | - A Santos
- Hospital Santa Cruz, Carnaxide, Portugal
| | - C Saraiva
- Hospital Santa Cruz, Carnaxide, Portugal
| | - M Mendes
- Hospital Santa Cruz, Carnaxide, Portugal
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21
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Jarazo J, Barmpa K, Modamio J, Saraiva C, Sabaté-Soler S, Rosety I, Griesbeck A, Skwirblies F, Zaffaroni G, Smits LM, Su J, Arias-Fuenzalida J, Walter J, Gomez-Giro G, Monzel AS, Qing X, Vitali A, Cruciani G, Boussaad I, Brunelli F, Jäger C, Rakovic A, Li W, Yuan L, Berger E, Arena G, Bolognin S, Schmidt R, Schröder C, Antony PMA, Klein C, Krüger R, Seibler P, Schwamborn JC. Parkinson's Disease Phenotypes in Patient Neuronal Cultures and Brain Organoids Improved by 2-Hydroxypropyl-β-Cyclodextrin Treatment. Mov Disord 2021; 37:80-94. [PMID: 34637165 PMCID: PMC9291890 DOI: 10.1002/mds.28810] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [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: 05/04/2021] [Revised: 09/07/2021] [Accepted: 09/10/2021] [Indexed: 12/13/2022] Open
Abstract
Background The etiology of Parkinson's disease (PD) is only partially understood despite the fact that environmental causes, risk factors, and specific gene mutations are contributors to the disease. Biallelic mutations in the phosphatase and tensin homolog (PTEN)‐induced putative kinase 1 (PINK1) gene involved in mitochondrial homeostasis, vesicle trafficking, and autophagy are sufficient to cause PD. Objectives We sought to evaluate the difference between controls' and PINK1 patients' derived neurons in their transition from neuroepithelial stem cells to neurons, allowing us to identify potential pathways to target with repurposed compounds. Methods Using two‐dimensional and three‐dimensional models of patients' derived neurons we recapitulated PD‐related phenotypes. We introduced the usage of midbrain organoids for testing compounds. Using Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR)/CRISPR‐associated protein 9 (Cas9), we corrected the point mutations of three patients' derived cells. We evaluated the effect of the selected compound in a mouse model. Results PD patient‐derived cells presented differences in their energetic profile, imbalanced proliferation, apoptosis, mitophagy, and a reduced differentiation efficiency to tyrosine hydroxylase positive (TH+) neurons compared to controls' cells. Correction of a patient's point mutation ameliorated the metabolic properties and neuronal firing rates as well as reversing the differentiation phenotype, and reducing the increased astrocytic levels. Treatment with 2‐hydroxypropyl‐β‐cyclodextrin increased the autophagy and mitophagy capacity of neurons concomitant with an improved dopaminergic differentiation of patient‐specific neurons in midbrain organoids and ameliorated neurotoxicity in a mouse model. Conclusion We show that treatment with a repurposed compound is sufficient for restoring the impaired dopaminergic differentiation of PD patient‐derived cells. © 2021 The Authors. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society
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Affiliation(s)
- Javier Jarazo
- Developmental and Cellular Biology, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg.,OrganoTherapeutics société à responsabilité limitée simplifiée (SARL-S), Esch-sur-Alzette, Luxembourg
| | - Kyriaki Barmpa
- Developmental and Cellular Biology, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Jennifer Modamio
- Developmental and Cellular Biology, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Cláudia Saraiva
- Developmental and Cellular Biology, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Sònia Sabaté-Soler
- Developmental and Cellular Biology, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Isabel Rosety
- Developmental and Cellular Biology, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | | | | | - Gaia Zaffaroni
- Institute for Globally Distributed Open Research and Education, Gothenburg, Sweden
| | - Lisa M Smits
- Developmental and Cellular Biology, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Jihui Su
- Institute of Health Sciences, China Medical University, Shenyang, China
| | - Jonathan Arias-Fuenzalida
- Developmental and Cellular Biology, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Jonas Walter
- Developmental and Cellular Biology, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Gemma Gomez-Giro
- Developmental and Cellular Biology, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Anna S Monzel
- Developmental and Cellular Biology, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Xiaobing Qing
- Developmental and Cellular Biology, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Armelle Vitali
- Translational Neuroscience, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Gerald Cruciani
- Translational Neuroscience, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg.,Disease Modeling and Screening Platform, Luxembourg Institute of Systems Biomedicine, University of Luxembourg and Luxembourg Institute of Health, Belvaux, Luxembourg
| | - Ibrahim Boussaad
- Translational Neuroscience, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg.,Disease Modeling and Screening Platform, Luxembourg Institute of Systems Biomedicine, University of Luxembourg and Luxembourg Institute of Health, Belvaux, Luxembourg
| | | | - Christian Jäger
- Metabolomics Platform, Enzymology and Metabolism, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | | | - Wen Li
- Institute of Health Sciences, China Medical University, Shenyang, China
| | - Lin Yuan
- Institute of Health Sciences, China Medical University, Shenyang, China
| | - Emanuel Berger
- Developmental and Cellular Biology, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Giuseppe Arena
- Translational Neuroscience, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Silvia Bolognin
- Developmental and Cellular Biology, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | | | | | - Paul M A Antony
- Translational Neuroscience, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Christine Klein
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Rejko Krüger
- Translational Neuroscience, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg.,Centre Hospitalier de Luxembourg, Parkinson Research Clinic, Luxembourg, Luxembourg.,Transversal Translational Medicine, Luxembourg Institute of Health, Strassen, Luxembourg
| | - Philip Seibler
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Jens C Schwamborn
- Developmental and Cellular Biology, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
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22
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Albuquerque F, Lopes P, Freitas P, Presume J, Gomes D, Abecasis J, Guerreiro S, Santos A, Saraiva C, Mendes M, Ferreira A. Coronary artery calcium score to predict coronary CT angiography interpretability: an old problem revisited. Eur Heart J Cardiovasc Imaging 2021. [DOI: 10.1093/ehjci/jeab111.013] [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: 11/12/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: None.
Introduction
Clinical guidelines recommend against the use of coronary computed tomography angiography (CCTA) in patients with heavy calcification due to interpretability concerns, but no specific approach or threshold is provided. Recently, alternative methods have been proposed as more reliable predictors of CCTA interpretability than the classic coronary artery calcium score (CACS). The purpose this study was to compare the performance of different measures of coronary calcification as predictors of CCTA interpretability.
Methods
We conducted a retrospective analysis of consecutive patients undergoing CACS and CCTA between 2018 and 2020. The key exclusion criteria were known coronary artery disease, CACS of zero, and presence of non-assessable coronary lesions for reasons other than calcification (movement/gating artifacts or vessel diameter < 2mm). CCTA studies were considered non-interpretable if the main reader considered one or more coronary lesions non-assessable due to calcification. Three different measures of coronary calcification were compared using ROC curve analysis: 1) total CACS; 2) CACS-to-lesion ratio (total CACS divided by the number of calcified plaques); and 3) calcium score of the most calcified plaque. Decision-tree analysis was performed to identify the algorithm that best predicts CCTA interpretability.
Results
A total of 432 patients (191 women, mean age 64 ± 11 years) were included. Overall, 31 patients (7.2%) had a non-interpretable CCTA due to calcification. Patients with non-interpretable CCTA had higher CACS (median 589 vs. 50 AU, p < 0.001), higher CACS-to-lesion ratio (median 43 vs. 14 AU/lesion, p < 0.001), and higher score of the most calcified plaque (median 445 vs. 43 AU, p < 0.001). Among the 3 methods, CACS showed the highest discriminative power to predict a non-interpretable CCTA (C-statistic 0.93, 95%CI 0.89-0.95, p < 0.001) - Figure.
Decision-tree analysis identified a single-variable algorithm (CACS value ≤ 515 AU) as the best discriminator of CCTA interpretability: 396 of the 409 patients (97%) with CACS ≤ 515 AU had an interpretable CCTA, whereas only 5 of the 23 patients (22%) with CACS > 515 AU had an interpretable test, yielding a total of 96% correct predictions.
Conclusions
The recently proposed and more complex measures of coronary calcification seem unable to outperform total CACS as a predictor of CCTA interpretability. A simple CACS cutoff-value around 500 AU remains the best discriminator for this purpose.
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Affiliation(s)
| | - P Lopes
- Hospital Santa Cruz, Carnaxide, Portugal
| | - P Freitas
- Hospital Santa Cruz, Carnaxide, Portugal
| | - J Presume
- Hospital Santa Cruz, Carnaxide, Portugal
| | - D Gomes
- Hospital Santa Cruz, Carnaxide, Portugal
| | - J Abecasis
- Hospital Santa Cruz, Carnaxide, Portugal
| | | | - A Santos
- Hospital Santa Cruz, Carnaxide, Portugal
| | - C Saraiva
- Hospital Santa Cruz, Carnaxide, Portugal
| | - M Mendes
- Hospital Santa Cruz, Carnaxide, Portugal
| | - A Ferreira
- Hospital Santa Cruz, Carnaxide, Portugal
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23
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Lopes P, Presume J, Araujo Goncalves P, Albuquerque F, Freitas P, Guerreiro S, Abecassis J, Coutinho Santos A, Saraiva C, Mendes M, Marques H, Ferreira A. Incorporating coronary calcification into pretest assessment of the likelihood of coronary artery disease: validation and recalibration of a new diagnostic tool. Eur Heart J Cardiovasc Imaging 2021. [DOI: 10.1093/ehjci/jeab111.020] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: None.
Background
A new clinical tool was recently proposed to improve the estimation of pre-test probability of obstructive coronary artery disease (CAD) by incorporating coronary artery calcium score (CACS) with clinical risk factors. This new model (Clinical + CACS) showed improved prediction when compared to the method recommended by the 2019 ESC guidelines on chronic coronary syndromes, but was never tested or adjusted for use in our population. The aim of this study was to assess the performance of this new method in a Portuguese cohort of symptomatic patients referred for coronary computed tomography angiography (CCTA), and to recalibrate it if necessary.
Methods
We conducted a two-center cross-sectional study assessing symptomatic patients who underwent CCTA for suspected CAD. Key exclusion criteria were age < 30 years, known CAD, suspected acute coronary syndrome, or symptoms other than chest pain or dyspnea. Obstructive CAD was defined as any luminal stenosis ≥50% on CCTA. The Clinical + CACS prediction model was assessed for discrimination and calibration. A logistical recalibration of the model was conducted in a random sample of 50% of the patients and subsequently validated in the other half.
Results
A total of 1910 patients (mean age 60 ± 11 years, 60% women) were included in the analysis. Symptom characteristics were: 39% non-anginal chest pain, 30% atypical angina, 19% dyspnea and 12% typical angina. The observed prevalence of obstructive CAD was 12.9% (n = 247). Patients with obstructive CAD were more often male, were significantly older, had higher prevalence of typical angina and cardiovascular risk factors, and higher CACS values. The new Clinical + CACS tool showed greater discriminative power than the ESC 2019 prediction model, with a C-statistic of 0.83 (CI 95% 0.81-0.86) versus 0.67 (CI 95% 0.64-0.71), respectively (p-value for comparison < 0.001). Before recalibration, the Clinical + CACS model underestimated the likelihood of CAD in our population across all quartiles of pretest probability (mean relative underestimation of 49%), which was subsequently corrected by the recalibration procedure - Figure.
Conclusions
In a Portuguese cohort of symptomatic patients undergoing CCTA for suspected CAD, the new Clinical + CACS model showed better discrimination power than the 2019 ESC method. The underestimation of the Clinical + CACS model was corrected by recalibrating it for our population. This new tool might prove useful for guiding decisions on the need for further testing.
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Affiliation(s)
- P Lopes
- Hospital Santa Cruz, Carnaxide, Portugal
| | - J Presume
- Hospital Santa Cruz, Carnaxide, Portugal
| | - P Araujo Goncalves
- UNICA – Cardiovascular CT and MR Unit, Hospital da Luz, Lisbon, Portugal
| | | | - P Freitas
- Hospital Santa Cruz, Carnaxide, Portugal
| | | | | | | | - C Saraiva
- Hospital Santa Cruz, Carnaxide, Portugal
| | - M Mendes
- Hospital Santa Cruz, Carnaxide, Portugal
| | - H Marques
- UNICA – Cardiovascular CT and MR Unit, Hospital da Luz, Lisbon, Portugal
| | - A Ferreira
- Hospital Santa Cruz, Carnaxide, Portugal
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24
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Silva C, Goncalves M, Lopes P, Ventosa A, Calqueiro J, Freitas PN, Guerreiro S, Brito J, Abecasis J, Raposo L, Saraiva C, Goncalves PA, Gabriel HM, Almeida M, Ferreira AM. Patients undergoing invasive coronary angiography after a positive single-photon emission computed tomography or a positive stress cardiac magnetic resonance - What to expect at the cath lab. Eur Heart J Cardiovasc Imaging 2021. [DOI: 10.1093/ehjci/jeab090.007] [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: 11/14/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: None.
Background
Randomized controlled trials comparing stress cardiac magnetic resonance (CMR) and single-photon emission computed tomography (SPECT) suggest similar diagnostic accuracy for detecting obstructive coronary artery disease (CAD). However, there are few data on whether or not this remains true in routine clinical practice.
The aim of this study was to assess the clinical and angiographic characteristics of patients undergoing invasive coronary angiography (ICA) after a positive stress CMR or positive SPECT, and to compare their positive predictive value with published results from the CE-MARC trial.
Methods
In this retrospective tertiary-center analysis, we included 429 patients (mean age 67 ± 10 years, 28% women, 42% diabetic) undergoing ICA between January 2016 and December 2020, after a positive stress CMR or positive SPECT. Regarding stress test, an adenosine protocol was performed in all stress CMR and in 76.4% (n = 272) of stress SPECT.
Stress test results, including ischemia location and severity, were classified as reported by their primary readers. Patients with missing data on key variables, and those in whom microvascular disease was considered likely in the original stress test report were excluded. Obstructive CAD was defined as any coronary artery stenosis ≥ 50% in a vessel compatible with the ischemic territory on stress testing.
Results
Out of the total 429 patients, 356 (83%) were referred after a positive SPECT, and 73 (17%) after a positive stress CMR. Patients did not differ regarding age, cardiovascular risk factors, previous revascularization or left ventricular dysfunction, but patients with SPECT were more frequently male (p = 0.046). Overall, 320 patients (75%) had obstructive CAD on ICA. The prevalence of obstructive CAD was similar in patients with positive SPECT vs. positive stress CMR (76.1% vs. 80.8%, respectively, p = 0.385). There were also no significant differences in the prevalence of left main or 3-vessel disease (9.0% vs. 9.6%, p = 0.871, and 19.7% vs. 23.3% p = 0.483, respectively). Revascularization was performed or planned in 59.3% of patients in the SPECT group, and 52.1% of those in the stress CMR group (p = 0.255). The positive predictive values of both techniques were similar to those reported in the CE-MARC trial (Figure), and would increase to 88.1% and 89.4% for SPECT and stress CMR, respectively, if patients reported as having only mild ischemia were excluded.
Conclusion
In this tertiary center analysis, stress CMR and SPECT showed similar positive predictive values, comparable to those reported in the CE-MARC trial.
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Affiliation(s)
- C Silva
- Hospital de Santa Cruz, Lisbon, Portugal
| | | | - P Lopes
- Hospital de Santa Cruz, Lisbon, Portugal
| | - A Ventosa
- Hospital de Santa Cruz, Lisbon, Portugal
| | | | - PN Freitas
- Hospital de Santa Cruz, Lisbon, Portugal
| | | | - J Brito
- Hospital de Santa Cruz, Lisbon, Portugal
| | - J Abecasis
- Hospital de Santa Cruz, Lisbon, Portugal
| | - L Raposo
- Hospital de Santa Cruz, Lisbon, Portugal
| | - C Saraiva
- Hospital de Santa Cruz, Lisbon, Portugal
| | | | - HM Gabriel
- Hospital de Santa Cruz, Lisbon, Portugal
| | - M Almeida
- Hospital de Santa Cruz, Lisbon, Portugal
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25
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Sa Mendes G, Ferreira AM, Freitas P, Abecasis J, Campante Teles R, De Araujo Goncalves P, Ribeiras R, Santos AC, Trabulo M, Silva C, Lopes P, Andrade MJ, Saraiva C, Almeida M, Mendes M. Calcium score of the aortic valve as a predictor of aortic stenosis severity. Eur Heart J Cardiovasc Imaging 2021. [DOI: 10.1093/ehjci/jeaa356.227] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: None.
Background
The calcium score of the aortic valve (CaScAoV) is now recommended as a supporting tool to assist in the grading of aortic stenosis (AS) severity when echocardiographic assessment is inconclusive. However, the proposed CaScAoV cut-offs for considering severe AS "unlikely", "likely", or "very likely" have never been validated in Portuguese cohorts.
Aim
The purpose of this study was to assess the performance of the proposed CaScAoV cut-offs in identifying patients with severe aortic stenosis.
Methods
A total of 513 consecutive patients (median age 83 years [IQR 79–87], 38% males) evaluated at a single-centre TAVI-programme between Jan/2016 and Nov/2019 were retrospectively identified. Only patients with an ECG-gated cardiac computed tomography (CT) and a transthoracic echocardiography performed within a 6-month time-frame were included. Main exclusion criteria were left ventricular ejection fraction < 50%, indexed stroke volume < 35 ml/m2, previous valve surgery and
bicuspid aortic disease. CaScAoV was measured according to the Agatston method (Agatston units – AU). As previously reported, the likelihood of aortic stenosis as assessed by CT was categorized as: "very likely" (>3000 AU for men, >1600 AU for women); "likely" (>2000 AU for men, >1200 AU for women) ; or unlikely (<1600 AU for men, <800 AU for women). Diagnostic tests performance measures were calculated for each category. Separate analyses were performed for each gender.
Results
Severe AS (mean gradient ≥ 40 mmHg) was present in 422 patients (overall 82.3%: 83.1% in females and 80.8% in males), with a median transvalvular gradient of 49 mmHg (IQR 42 – 60).
Overall, the discriminative ability of the CaScAoV to distinguish severe from non-severe AS was higher in men when compared with women (c-statistic 0.86 [95%CI 0.80 – 0.93] vs. 0.72 [95%CI 0.64 – 0.80], p for comparison < 0.001). In males, the "very likely" cut-off had a sensitivity of 71% (95%CI 63 – 78%), a specificity of 81% (95%CI 65 – 92%), a positive predictive value (PPV) of 94% (95%CI 89 – 97%) and a negative predictive value (NPV) of 40% (95%CI 33 – 46%) for the diagnosis of severe AS. Conversely, in women the sensitivity was 75% (95%CI 69 – 80%), specificity was 57% (95%CI 43 – 71%), PPV was 90% (95%CI 86 – 92%) and NPV was 32% (95%CI 25 – 39%).
On the other end of the spectrum, the "unlikely" cut-off showed poor performance in dismissing severe AS, particularly in females – NPV of 43% (95%CI 25-63%) in women vs. 83% (95%CI 63-93%) in men.
Conclusion
In our population, the discriminative power of CaScAoV for identifying patients with severe AS was lower than in previously published cohorts, particularly in females. While very high CaScAoV is strongly supportive of severe AS, caution should be employed when interpreting low CaScAoV values in women, since the recommended cut-off value does not allow the safe exclusion of severe aortic stenosis.
Abstract Figure. Waterfall chart of individuals CaScAoV
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Affiliation(s)
| | | | - P Freitas
- Hospital de Santa Cruz, Carnaxide, Portugal
| | - J Abecasis
- Hospital de Santa Cruz, Carnaxide, Portugal
| | | | | | - R Ribeiras
- Hospital de Santa Cruz, Carnaxide, Portugal
| | - AC Santos
- Hospital de Santa Cruz, Carnaxide, Portugal
| | - M Trabulo
- Hospital de Santa Cruz, Carnaxide, Portugal
| | - C Silva
- Hospital de Santa Cruz, Carnaxide, Portugal
| | - P Lopes
- Hospital de Santa Cruz, Carnaxide, Portugal
| | - MJ Andrade
- Hospital de Santa Cruz, Carnaxide, Portugal
| | - C Saraiva
- Hospital de Santa Cruz, Carnaxide, Portugal
| | - M Almeida
- Hospital de Santa Cruz, Carnaxide, Portugal
| | - M Mendes
- Hospital de Santa Cruz, Carnaxide, Portugal
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26
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Serra-Almeida C, Saraiva C, Esteves M, Ferreira R, Santos T, Cristóvão AC, Bernardino L. C-Terminal Binding Proteins Promote Neurogenesis and Oligodendrogenesis in the Subventricular Zone. Front Cell Dev Biol 2021; 8:584220. [PMID: 33490060 PMCID: PMC7815648 DOI: 10.3389/fcell.2020.584220] [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] [Received: 07/16/2020] [Accepted: 12/08/2020] [Indexed: 11/22/2022] Open
Abstract
C-terminal binding proteins (CtBPs) are transcriptional modulators that can regulate gene expression through the recruitment of a corepressor complex composed of chromatin-modifying enzymes and transcriptional factors. In the brain, CtBPs have been described as regulators of cell proliferation, differentiation, and survival. Nevertheless, the role of CtBPs on postnatal neural stem cells (NSCs) fate is not known yet. Herein, we evaluate the expression and functions of CtBPs in postnatal NSCs from the subventricular zone (SVZ). We found that CtBPs were expressed in immature/progenitor cells, neurons and glial cells in the SVZ niche. Using the CtBPs modulator 4-methylthio 2-oxobutyric acid (MTOB), our results showed that 1 mM of MTOB induced cell death, while 5, 25, and 50 μM increased the number of proliferating neuroblasts, mature neurons, and oligodendrocytes. Interestingly, it also increased the dendritic complexity of immature neurons. Altogether, our results highlight CtBPs putative application for brain regenerative applications.
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Affiliation(s)
- Catarina Serra-Almeida
- Faculty of Health Sciences, Health Sciences Research Centre (CICS-UBI), University of Beira Interior, Covilhã, Portugal
| | - Cláudia Saraiva
- Faculty of Health Sciences, Health Sciences Research Centre (CICS-UBI), University of Beira Interior, Covilhã, Portugal
| | - Marta Esteves
- Faculty of Health Sciences, Health Sciences Research Centre (CICS-UBI), University of Beira Interior, Covilhã, Portugal
| | - Raquel Ferreira
- Faculty of Health Sciences, Health Sciences Research Centre (CICS-UBI), University of Beira Interior, Covilhã, Portugal
| | - Tiago Santos
- Faculty of Health Sciences, Health Sciences Research Centre (CICS-UBI), University of Beira Interior, Covilhã, Portugal
| | - Ana Clara Cristóvão
- Faculty of Health Sciences, Health Sciences Research Centre (CICS-UBI), University of Beira Interior, Covilhã, Portugal.,NeuroSoV, UBImedical, University of Beira Interior, Covilhã, Portugal
| | - Liliana Bernardino
- Faculty of Health Sciences, Health Sciences Research Centre (CICS-UBI), University of Beira Interior, Covilhã, Portugal
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27
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Saraiva S, Saraiva C, Oliveira I, Stilwell G, Esteves A. Effects of age, weight, and housing system on prevalence of dead on arrival and carcass condemnation causes in laying hens. Poult Sci 2020; 100:100910. [PMID: 33518312 PMCID: PMC7936178 DOI: 10.1016/j.psj.2020.12.012] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Revised: 12/03/2020] [Accepted: 12/04/2020] [Indexed: 12/02/2022] Open
Abstract
Causes of condemnation and dead on arrival (DoA) birds were studied at the slaughterhouse and effects of age, BW, and housing system were investigated. A total of 1,156 (0.18%) birds were found DoA and 20,754 carcasses out of 629,331 (3.30%) were condemned during postmortem inspection. The main reasons for condemnation were peritonitis, septicemia, salpingitis, emaciation, and tumors. The mean percentages of condemnation by septicemia and emaciation differed according to age and BW groups and were more common in batches of younger (≤87 wk) and lighter (≤1.88 kg) birds. Moreover, peritonitis and ascites differed significantly between age groups, occurring more frequently in batches of older hens. The presence of tumors of the reproductive system was more frequently observed in older and heavier hens. This result raises the possibility of tumors being correlated with the higher number of prior ovulatory events. The total condemnation rate was lower in hens from organic systems, followed by free-range, and differed significantly from barns and cage systems. Carcasses with ascites and peritonitis were found more commonly in hens from cages and barns and both differed significantly from organic systems. Salpingitis was statistically more prevalent in barns, presenting differences from organic and free-range systems. Monitoring condemnation causes of end-of-lay hens at slaughter provided a better understanding of health and welfare issues in different housing systems and allowed to identify potential welfare problems, which can be used to improve management and welfare on farms.
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Affiliation(s)
- S Saraiva
- School of Agrarian and Veterinary Sciences, DCV, CECAV, Center of Animal Science and Veterinary, University of Trás-os-Montes e Alto Douro, Portugal.
| | - C Saraiva
- School of Agrarian and Veterinary Sciences, DCV, CECAV, Center of Animal Science and Veterinary, University of Trás-os-Montes e Alto Douro, Portugal
| | - I Oliveira
- CEMAT-IST-UL, Center for Computational and Stochastic Mathematics, University of Lisbon, Portugal
| | - G Stilwell
- Animal Behaviour and Welfare Laboratory, Center of Interdisciplinary Investigation in Animal Health, Faculty of Veterinary Medicine, University of Lisbon, Portugal
| | - A Esteves
- School of Agrarian and Veterinary Sciences, DCV, CECAV, Center of Animal Science and Veterinary, University of Trás-os-Montes e Alto Douro, Portugal
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28
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Sousa J, Matos D, Ferreira A, Abecasis J, Saraiva C, Freitas P, Carmo J, Carvalho S, Rodrigues G, Durazzo A, Costa F, Carmo P, Morgado F, Cavaco D, Adragao P. Epicardial adipose tissue and atrial fibrillation: guilty as charged or guilty by association? Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.0468] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Epicardial adipose tissue (EAT) has been linked to the presence and burden of atrial fibrillation (AF). However, it is still unclear whether this relationship is causal or simply a surrogate marker of other risk factors commonly associated with AF.
Purpose
The purpose of this study was to assess the relationship between these factors and EAT, and to compare their performance in predicting AF recurrence after an ablation procedure.
Methods
We assessed 575 consecutive patients (mean age 61±11 years, 62% male) undergoing AF ablation preceded by cardiac CT in a high-volume ablation center. EAT was measured on cardiac CT using a modified simplified method. Patients were divided into 2 groups (above vs. below the median EAT volume). Cox regression was used to assess the relationship between epicardial fat, risk factors, and AF relapse.
Results
Patients with above-median EAT volume were older (p<0.001), more often male (OR 1.7, p=0.002), had higher body mass index, and higher prevalence of smoking, hypertension, diabetes and dyslipidemia (p<0.05). Non-paroxysmal AF was also more common in those with above-median EAT volume. During a median follow-up of 18 months, 232 patients (40.3%) suffered AF recurrence. After adjustment for BMI and other univariate predictors of relapse, three variables emerged independently associated with time to AF recurrence: non-paroxysmal AF (HR 2.1, 95% CI: 1.5–2.7, p<0.001), indexed left atrial (LA) volume (HR 1.006 per mL/m2, 95% CI: 1.002–1.011, p<0.001), and indexed epicardial fat volume (HR 1.87 per mL/m2, 95% CI: 1.66–2.1, p<0.001). None of the classic cardiovascular risk factors were an independent predictor of AF recurrence (all p>0.10).
Conclusion
Classic cardiovascular risk factors are more prevalent in patients with higher amounts of epicardial fat. However, unlike these risk factors, EAT is a powerful predictor of AF recurrence after ablation. These findings suggest that EAT is not merely a surrogate marker, but an important participant in the pathophysiology of AF.
EAT, cvrf and AF burden
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- J Sousa
- Hospital Dr. Nélio Mendonça, Cardiology, Funchal, Portugal
| | - D Matos
- Hospital de Santa Cruz, Cardiology, Lisbon, Portugal
| | - A Ferreira
- Hospital de Santa Cruz, Cardiology, Lisbon, Portugal
| | - J Abecasis
- Hospital de Santa Cruz, Cardiology, Lisbon, Portugal
| | - C Saraiva
- Hospital de Santa Cruz, Radiology, Lisbon, Portugal
| | - P Freitas
- Hospital de Santa Cruz, Cardiology, Lisbon, Portugal
| | - J Carmo
- Hospital de Santa Cruz, Cardiology, Lisbon, Portugal
| | - S Carvalho
- Hospital de Santa Cruz, Cardiology, Lisbon, Portugal
| | - G Rodrigues
- Hospital de Santa Cruz, Cardiology, Lisbon, Portugal
| | - A Durazzo
- Hospital de Santa Cruz, Cardiology, Lisbon, Portugal
| | - F.M Costa
- Hospital de Santa Cruz, Cardiology, Lisbon, Portugal
| | - P Carmo
- Hospital de Santa Cruz, Cardiology, Lisbon, Portugal
| | - F Morgado
- Hospital de Santa Cruz, Cardiology, Lisbon, Portugal
| | - D Cavaco
- Hospital de Santa Cruz, Cardiology, Lisbon, Portugal
| | - P Adragao
- Hospital de Santa Cruz, Cardiology, Lisbon, Portugal
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29
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Lopes Da Cunha G, Rocha B, Freitas P, Lopes P, Santos A, Guerreiro S, Abecasis J, Aguiar C, Andrade M, Saraiva C, Mendes M, Ferreira A. Unveiling coronary inflammation by perivascular fat angio-CT: a propensity-matched score analysis. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1299] [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
Background
Inflammation plays a pivotal role in the atherogenic process and recently has been the target of successful clinical trials. A new CT angiography method allows the identification of inflammatory pericoronary fat, which is associated with cardiovascular events. We aimed to determine whether patients with obstructive coronary artery disease (CAD) have a higher pericoronary inflammatory milieu when compared to those without CAD.
Methods
From a prospective CT angiography registry of patients with suspected obstructive CAD, those with a luminal stenosis >70% confirmed by invasive coronary angiography were screened (previous coronary artery bypass grafting was an exclusion criteria). Subsequently, we applied a 1:1 propensity score (PS) without replacement protocol to match obstructive CAD patients with those without CAD (non-CAD), using age, gender, BMI, hypertension, dyslipidemia, diabetes and smoking status as covariates. Similar to previous reports, pericoronary fat characterization by CT angiography was performed by analyzing the fat attenuation index (FAI) at the −30 to −190 HU range. Inflammatory fat was defined by a FAI >−70 HU. The proximal 50mm of the right coronary artery (RCA) was used to perform fat quantification and characterization. The perivascular fat was defined as the adipose tissue within a radial distance from the outer vessel wall equal to the diameter of the vessel.
Results
A matched cohort of 48 patients was identified (mean age 63 years; 77% males) – 24 obstructive CAD and 24 non-CAD patients. Mean FAI was numerically higher in obstructive CAD compared to the non-CAD cohort (−74±7 vs −78±7; p=0.083). Although not statistically significant, those with obstructive CAD had an increased proportion of inflammatory fat (51±10 vs 46±10%; p=0.107). After adjustment for body surface area (BSA), differences in the inflammatory fat proportion became apparent between obstructive CAD and non-CAD patients (28±6 vs 24±5%/m2; p=0.024). Furthermore, we observed a significant correlation between the inflammatory fat proportion (both absolute value and BSA adjusted) and the total number of RCA plaques (r=0.458; p=0.003; and r=0.451; p=0.003, respectively). Finally, there was 1 additional plaque observed in the RCA for each increase in 10% of proportion of inflammatory fat (p=0.018).
Conclusions
Perivascular coronary inflammation, as measured by FAI, seems significantly heightened in patients with obstructive CAD compared to a matched cohort of non-CAD patients. Further studies are needed to ascertain the mechanisms and possible implications of this association.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - C Saraiva
- Hospital Santa Cruz, Lisbon, Portugal
| | - M Mendes
- Hospital Santa Cruz, Lisbon, Portugal
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30
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Nascimento Matos D, Ferreira A, Cavaco D, Sousa A, Freitas P, Rodrigues G, Carmo J, Abecasis J, Costa F, Santos A, Carmo P, Saraiva C, Morgado F, Mendes M, Adragao P. Epicardial fat volume outperforms classic clinical scores for predicting atrial fibrillation relapse after pulmonary vein isolation. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.0587] [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: 11/12/2022] Open
Abstract
Abstract
Background
Epicardial adipose tissue has been implicated in the pathophysiology of atrial fibrillation (AF), but its relevance to clinical practice remains uncertain. The aim of this study was to compare the performance of the amount of epicardial fat with previously published clinical scores of AF-relapse risk after pulmonary vein isolation (PVI).
Methods
We assessed 575 patients (354 men, age 61±11 years, 449 paroxysmal AF) with symptomatic AF undergoing cardiac CT prior to a PVI procedure. Epicardial fat was quantified on contrast-enhanced images using a new simplified semi-automated method. The study endpoint was symptomatic and/or documented AF recurrence at 12 months. Epicardial fat was compared against the following scores: MB-LATER, APPLE, DR-FLASH, and ATLAS.
Results
Median follow-up was of 22 months (IQR 12–35), 232 patients relapsed, 130 patients (27%) within the first 12 months. After adjustment for BMI and other univariate predictors of relapse, three variables emerged independently associated with time to AF recurrence: non-paroxysmal AF (HR 2.03, 95% CI: 1.53–2.69, p<0.001), indexed left atrial (LA) volume (HR 1.02 per mL/m2, 95% CI: 1.01–1.02, p<0.001), and indexed pericardial fat volume (HR 1.55 per mL/m2, 95% CI: 1.43–1.67, p<0.001). Based on the ROC curve analysis, the epicardial fat showed greater discriminative power, with a C-statistic of 0.76 (95% CI: 0.71–0.81) against 0.67 (p=0.007 for pairwise comparison of ROC curves), 0.67 (p=0.01), 0.63 (p<0.001) and 0.57 (p<0.001) for the MBLATER, APPLE, DR-FLASH and ATLAS scores, respectively. The C-statistic for indexed LA volume and non-paroxysmal AF AUC were of 0.63 (p<0.001) and 0.61 (p<0.001), respectively.
Conclusion
Pericardial fat volume is a strong independent predictor of AF relapse after PVI, outperforming clinical scores of post-PVI AF. The underlying mechanisms of this association deserve further study.
ROC Curve Analysys
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
| | - A.M Ferreira
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - D Cavaco
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - A Sousa
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - P Freitas
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - G Rodrigues
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - J Carmo
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - J Abecasis
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - F Costa
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - A.C Santos
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - P Carmo
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - C Saraiva
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - F Morgado
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - M Mendes
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - P Adragao
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
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31
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Silva C, Freitas P, Ferreira A, Albuquerque F, Guerreiro S, Abecasis J, Rodrigues G, Carmo J, Saraiva C, Goncalves M, Carmo P, Cavaco D, Morgado F, Adragao P, Mendes M. Prevalence of LAA thrombus in patients undergoing percutaneous ablation of atrial fibrillation. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.0566] [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
Introduction
Computed tomography (CT) is often performed before atrial fibrillation (AF) ablation to assess the anatomy of the pulmonary veins and exclude left atrial (LA) and left atrial appendage (LAA) thrombus. With the growing use of new oral anticoagulants (NOACs), a reassessment of the need for systematic thrombus exclusion in this context seems warranted.
Objective
To evaluate the prevalence of thrombus in LA/LAA in pre-ablation CT in a contemporary cohort of patients predominantly anticoagulated with NOACs.
Methods
We evaluated 789 consecutive patients (mean age 61±12 years; 38% female; 84% with paroxysmal AF) who underwent pre-ablation CT between Oct/2015 and Oct/2019. ECG-gated CT-angiography was performed using a dual-source 64-slice CT after iodinated contrast injection. Whenever necessary, a second dedicated acquisition was made 60 seconds after the first set of images. Presence of thrombus was defined as a persistent opacification defect. For each patient, thromboembolic risk was assessed with the CHA2DS2-VASc score.
Results
The median interval between CT and AF ablation was 1 day (IQR 1 – 2 days). The median CHA2DS2-VASc was 2 points (IQR 0 – 3 points), with 590 patients (75%) having CHA2DS2-VASc ≥1. Among the 199 patients (25%) with CHA2DS2-VASc = 0, 118 (59,3%) were anticoagulated with a NOAC and 14 (7%) with a vitamin K antagonist; 67 (34%) were not anticoagulated. Conversely, amongst the 590 patients with CHA2DS2-VASc ≥1, 84% were anticoagulated with a NOAC (n=494), 11% used vitamin K antagonists (n=62), and 34 patients were not anticoagulated (23 with CHA2DS2-VASc = 1). On cardiac CT, 521 (66%) patients were in sinus rhythm. Overall, only one LAA thrombus was found (0.12% [1/789]; 95% CI: 0.0–0.7%) – in a patient with CHA2DS2-VASc = 0, anticoagulated with a NOAC. The median effective radiation dose was 3.2 mSv (IQR 2.1–4.8 mSv). There were 5 minor allergic reactions to iodinated contrast. No strokes were documented within the first 24 hours after ablation.
Conclusion
In this contemporary cohort of patients with predominantly paroxysmal AF and anticoagulated with NOAC, the prevalence of intracavitary thrombus was extremely low (0.12%). While these findings do not compromise the multipurpose role of pre-ablation CT, they should nevertheless inform future discussions on the risk/benefit and cost/benefit of performing systematic exclusion of LA/LAA thrombi prior to AF ablation.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- C Silva
- Hospital de Santa Cruz, Lisbon, Portugal
| | | | | | | | | | | | | | - J Carmo
- Hospital de Santa Cruz, Lisbon, Portugal
| | - C Saraiva
- Hospital de Santa Cruz, Lisbon, Portugal
| | | | - P Carmo
- Hospital de Santa Cruz, Lisbon, Portugal
| | - D Cavaco
- Hospital de Santa Cruz, Lisbon, Portugal
| | - F Morgado
- Hospital de Santa Cruz, Lisbon, Portugal
| | - P Adragao
- Hospital de Santa Cruz, Lisbon, Portugal
| | - M Mendes
- Hospital de Santa Cruz, Lisbon, Portugal
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Rocha B, Lopes Da Cunha G, Freitas P, Lopes P, Santos A, Guerreiro S, Tralhao A, Ventosa A, Andrade M, Aguiar C, Abecasis J, Saraiva C, Mendes M, Ferreira A. Lung water quantification by cardiac magnetic resonance imaging: a novel prognostic tool in hf. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1020] [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
Background
Cardiac magnetic resonance (CMR) imaging has recently been proposed to quantify lung water density (LWD, %) non-invasively. Given that pulmonary congestion plays a key role in the pathophysiology of Heart Failure (HF), we designed a study to assess the prognostic significance of a simplified LWD measure in patients with HF and reduced left ventricular ejection fraction (LVEF).
Methods
We conducted a single-center retrospective study of consecutive patients with HF and LVEF <50% who underwent CMR on a 1.5T scanner. Those with severe interstitial lung disease or chronic liver disease were excluded. All measurements were performed in a parasagittal plane at the right midclavicular line on a standard HASTE sequence, which is widely available in all CMR studies. As previously reported, LWD was determined by the lung-to-liver signal ratio multiplied by 0.7. A cohort of 102 healthy controls was used to derive the upper limit of normal (mean ± 2SD) of the LWD (21.2%). The primary endpoint was a composite of all-cause death or HF hospitalization.
Results
A total of 290 HF patients (mean age 64±12 years, 74.8% male, 56.2% of ischemic etiology) with a mean LVEF of 34±10% were included. LWD measurement took on average 35±4 seconds and showed excellent inter-observer agreement (intra-class correlation coefficient >0.90). LWD was increased in 65 (22.4%) patients. Compared to those with normal LWD, the former were more symptomatic (NYHA ≥III: 29.2% vs. 1.8%; p=0.017) and had higher median NT-proBNP [1973 (IQR: 809–3766) vs 802 (IQR: 355–2157pg/mL); p<0.001]. During a median followup of 21 months (IQR: 13–29), 20 (6.9%) patients died and 40 (13.8%) had at least one HF hospitalization. In multivariate analysis, LVEF (HR per 1%: 0.96; CI-95%: 0.93–0.99; p=0.024), creatinine (HR per 1mg/dL: 2.43; CI-95%: 1.25–4.71; p=0.009) and LWD (HR per 1%: 1.06; CI-95%: 1.01–1.12; p=0.013) were independent predictors of the primary endpoint. The findings were mainly driven by an association between LWD and HF hospitalization (HR per 1%: 1.08; CI-95%: 1.03–1.13; p=0.002).
Conclusions
A CMR-derived method for LWD quantification independently predicts an increased risk of death or HF hospitalization in HF patients with LVEF <50%. Our results support LWD measurement as a simple, reproducible and widely available method, further adding to the prognostic role of CMR in this population.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
| | | | - P Freitas
- Hospital Santa Cruz, Lisbon, Portugal
| | - P Lopes
- Hospital Santa Cruz, Lisbon, Portugal
| | | | | | - A Tralhao
- Hospital Santa Cruz, Lisbon, Portugal
| | - A Ventosa
- Hospital Santa Cruz, Lisbon, Portugal
| | | | | | | | - C Saraiva
- Hospital Santa Cruz, Lisbon, Portugal
| | - M Mendes
- Hospital Santa Cruz, Lisbon, Portugal
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33
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Nascimento Matos D, Ferreira A, Sousa A, Rodrigues G, Carmo J, Freitas P, Guerreiro S, Abecasis J, Costa F, Carmo P, Saraiva C, Cavaco D, Morgado F, Mendes M, Adragao P. A machine-learning algorithm to predict atrial fibrillation recurrence after a pulmonary vein isolation procedure. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.0586] [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: 11/15/2022] Open
Abstract
Abstract
Background
Contemporary risk models to predict the recurrence of atrial fibrillation (AF) after pulmonary vein isolation have limited predictive ability. Models with high specificity seem particularly suited for the setting of AF ablation, where they could be used as gatekeepers to withhold intervention in patients with low likelihood of success. Machine learning (ML) has the potential to identify complex nonlinear patterns within datasets, improving the predictive power of models. This study sought to determine whether ML can be used to better identify patients who will relapse within one year of an AF ablation procedure.
Methods
We assessed 484 patients (294 men, mean age 61±12 years, 76% with paroxysmal AF) who underwent radiofrequency pulmonary vein isolation (PVI) for symptomatic drug-refractory AF. Using this dataset, a machine-learning model based on Support Vector Machines (SVM) was developed to predict AF recurrence within one year of the procedure. The following variables were used to feed the model: type of AF (paroxysmal vs. non-paroxysmal), previous ablation procedure, left atrium (LA) volume, and epicardial fat volume (both derived from pre-ablation cardiac CT). The algorithm was trained in a random sample of 70% of the study population (n=339) and tested in the remainder 30% (n=145).
Results
A total of 130 patients (27%) suffered AF recurrence within one year of the procedure. The ML model predicted AF recurrence with 75% accuracy (95% CI 67–82%), yielding a sensitivity and specificity of 25% (95% CI 13–41%) and 94% (95% CI 88–98%), respectively. The corresponding positive and negative predictive values were 62% (95% CI 39–81%) and 77% (95% CI 67–82%), respectively. The relative weight of the variables in the ML model was: epicardial fat 56%, type of AF 23%, previous ablation 14%, and LA volume 7%. A high-risk subgroup representing 10.8% of patients was identified with the ML algorithm. In this subgroup, one-year recurrence was 62%, representing 24% of the total number of recurrences.
Conclusion
A machine-learning model showed high specificity in the identification of patients who relapse during the first year after AF ablation. In the future, these tools may be useful to improve patient selection.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
| | - A.M Ferreira
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - A Sousa
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - G Rodrigues
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - J Carmo
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - P Freitas
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - S Guerreiro
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - J Abecasis
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - F Costa
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - P Carmo
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - C Saraiva
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - D Cavaco
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - F Morgado
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - M Mendes
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - P Adragao
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
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34
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Nascimento Matos D, Ferreira A, Freitas P, Rodrigues G, Carmo J, Carvalho M, Abecasis J, Carmo P, Saraiva C, Cavaco D, Morgado F, Mendes M, Adragao P. Relationship between epicardial fat and left atrium fibrosis in patients with atrial fibrillation. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.0588] [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
Background
Epicardial adipose tissue (EAT) has recently been shown to be associated with the presence, severity, and recurrence of atrial fibrillation (AF). Although the pathophysiological mechanisms underlying this association remain to be established, several hypotheses have been put forward, including direct adipocyte infiltration, oxidative stress, and the secretion of adipokines causing inflammation and fibrosis of atrial tissue. We hypothesized that the volume of EAT and the amount of left atrium (LA) fibrosis assessed by non-invasive imaging would be significantly correlated in patients with AF, and that both would predict time to relapse after pulmonary vein isolation (PVI).
Methods
Sixty-eight patients with AF being studied for a first PVI procedure underwent both cardiac computerized tomography (CT) and cardiac magnetic resonance (CMR) within less than 48h. EAT was quantified on contrast-enhanced CT images. LA fibrosis was quantified on isotropic 1.5mm 3D delayed enhancement CMR for image intensity ratio values >1.20. Radiofrequency PVI was performed using an irrigated contact force-sensing ablation catheter, guided by electroanatomical mapping. After PVI, patients were followed for AF recurrence, defined as symptomatic or documented AF after a 3-month blanking period. Pearson's correlation coefficient was used for gauging the correlation between EATLM volume and LA fibrosis. The relationship between these two variables and time to AF recurrence was assessed by Cox regression.
Results
Most of the 68 patients (46 men, mean age 61±12 years) had paroxysmal AF (71%, n=48). The mean body mass index (BMI) was 28.0±4.0 kg/m2. Patients had a median EATLM volume of 2.4 cm3/m2 [interquartile range (IQR) 1.6–3.2 cm3/m2], and a median estimated amount of LA fibrosis of 8.9 g (IQR 5–15 g), corresponding to 8% (IQR 5–11%) of the total LA wall mass. The correlation between EATLM and LA fibrosis was statistically significant but weak (Pearson's R = 0.38, P=0.001) – Figure 1. During a median follow-up of 22 months (IQR 12–31), 31 patients (46%) suffered AF recurrence. Four predictors of relapse were identified in univariate Cox regression: EATLM (HR 2.19, 95% CI 1.65–2.91, P<0.001), LA fibrosis (HR 1.05, 95% CI 1.01–1.09, P=0.033), non-paroxysmal AF (HR 3.36, 95% CI 1.64–6.87, P=0.001), and LA volume (HR 1.03, 95% CI 1.01–1.06, P=0.006). Multivariate analysis yielded two independent predictors of time to AF relapse: EATLM (HR 2.05, 95% CI 1.51–2.79, P<0.001), and non-paroxysmal AF (HR 2.36, 95% CI 1.08–5.16, P=0.031).
Conclusion
The weak correlation between EAT and LA suggests that LA fibrosis is not the main mechanism by which EAT and AF are linked. EAT was more strongly associated with AF recurrence than LA fibrosis, which supports the existence of other, more important mediators between EAT and this arrhythmia.
Correlation between EAT and LA
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
| | - A Ferreira
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - P Freitas
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - G Rodrigues
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - J Carmo
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - M.S Carvalho
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - J Abecasis
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - P Carmo
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - C Saraiva
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - D Cavaco
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - F Morgado
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - M Mendes
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - P Adragao
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
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Gama F, Rocha B, Freitas P, Ferreira A, Abecasis J, Guerreiro S, Saraiva C, Santos A, Andrade M, Ventosa A, Almeida M, Pintao S, Mendes M. Downstream testing after an halted coronary CT angiography due to high coronary artery calcium score. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.0176] [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: 11/12/2022] Open
Abstract
Abstract
Background and aim
In many centers, coronary artery calcium score (CACS) is performed immediately before coronary CT angiography (CCTA) in order to exclude heavy calcification that could hamper test performance. When high CACS values are found, CCTA is usually aborted and other tests suggested. However, there are no recommendations on which test to pursue, and little data on their diagnostic yield in this setting. The aim of this study was to assess the type and results of downstream testing among patients whose CCTA study was halted due to high CACS.
Methods
Single-centre retrospective study of consecutive patients undergoing CCTA for suspected obstructive coronary artery disease (CAD). A CACS threshold of >400 was generally used to cancel CCTA. Downstream testing and its results were assessed using electronic medical records. A group of consecutive patients with CACS <400 who underwent CCTA was used for comparison.
Results
Of the 795 patients who performed CCTA for suspected CAD, 86 (10.8%), had their test halted due to high CACS (57 men, mean age 71±11 years). In this subgroup, the median pre-test probability for CAD was 27% (interquartile range 25) and the median CACS was 983 (interquartile range 930). Compared to patients who underwent CCTA, those who saw their tests cancelled were older, more frequently male, and had higher prevalence of cardiovascular risk factors and higher pre-test probability for CAD.
Patient's downstream testing is illustrated in Figure. From the 86 patients enrolled, 12 are currently waiting for downstream tests and were excluded from further analysis. Overall, 35 patients ended up performing invasive coronary angiography (ICA, 47.3%) of whom 19 (54.3%) had significant CAD. Among those who underwent non-invasive testing (N=19, 25.7%), 10 (52.6%) had significant ischemia and 4 (21%) underwent additional testing with ICA. In 24 patients (32.4%), no downstream testing was pursued. Finally, 17 (22.3%) patients underwent coronary revascularization, either percutaneous (N=10, 13.5%) or surgical (N=7, 10.8%).
Conclusion
Invasive coronary angiography is the most frequently used downstream test when CCTA is halted due to high CACS values, and shows significant CAD in roughly half of the cases. Considering the high prevalence of significant CAD, direct referral for ICA (with the possibility of invasive functional testing) seems a reasonable approach.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- F Gama
- Hospital de Santa Cruz, Carnaxide, Portugal
| | - B Rocha
- Hospital de Santa Cruz, Carnaxide, Portugal
| | - P Freitas
- Hospital de Santa Cruz, Carnaxide, Portugal
| | - A Ferreira
- Hospital de Santa Cruz, Carnaxide, Portugal
| | - J Abecasis
- Hospital de Santa Cruz, Carnaxide, Portugal
| | | | - C Saraiva
- Hospital de Santa Cruz, Carnaxide, Portugal
| | - A.C Santos
- Hospital de Santa Cruz, Carnaxide, Portugal
| | | | - A Ventosa
- Hospital de Santa Cruz, Carnaxide, Portugal
| | - M Almeida
- Hospital de Santa Cruz, Carnaxide, Portugal
| | - S Pintao
- Hospital de Santa Cruz, Carnaxide, Portugal
| | - M Mendes
- Hospital de Santa Cruz, Carnaxide, Portugal
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Lopes P, Albuquerque F, Freitas P, Rocha B, Cunha G, Mendes G, Abecasis J, Santos A, Saraiva C, Mendes M, Ferreira A. Pre-test probability of obstructive coronary artery disease in the new guidelines: too much, too little or just enough? Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1380] [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: 11/14/2022] Open
Abstract
Abstract
Background
Previous 2013 ESC guidelines recommended the use of the Modified Diamond-Forrester method to assess the pre-test probability (PTP) of obstructive coronary artery disease (CAD). The 2019 ESC Chronic Coronary Syndrome guidelines updated this recommendation with a major downgrade in PTP. The aim of this study was to compare the performance of these two methods in patients with stable chest pain undergoing coronary computed tomography angiography (CCTA) for suspected CAD.
Methods
We performed a retrospective analysis on prospectively collected data from a cohort of consecutive patients undergoing CCTA for suspected CAD from October 2016 to 2019. Key exclusion criteria were age <30 years-old, known CAD, suspected acute coronary syndrome or symptoms other than chest pain. Obstructive CAD was defined as any luminal stenosis ≥50% on CCTA. Whenever invasive coronary angiography (ICA) was subsequently performed, patients were reclassified if luminal stenosis was <50%. The two PTP prediction models were assessed for calibration and discrimination.
Results
A total of 320 patients (median age 63 years [IQR 53–70], 59% women) were included. Chest pain characteristics were: 48% atypical angina, 38% non-anginal chest pain, 14% typical angina. The observed prevalence of obstructive CAD was 16.3% (n=52). Patients with obstructive CAD were more often male, were significantly older and had a higher prevalence of typical angina and cardiovascular risk factors (except for family history of CAD). On average, individual PTP was 22.1% lower in the new guidelines. The 2013 prediction model significantly overestimated the likelihood of obstructive CAD (mean PTP 37.3% vs 16.3%; relative overestimation of 130%, p-value for miscalibration 0.005). The updated 2019 method showed good calibration for predicting the likelihood of obstructive CAD (mean PTP 15.2% vs 16.3%; relative underestimation of 6.5%, p-value for miscalibration 0.712). The two approaches showed similar discriminative power, with a C-statistics of 0.730 and 0.735 for the 2013 and 2019 methods, respectively (p-value for comparison 0.933). Stratification by gender produced similar results.
Conclusions
In patients with stable chest pain undergoing CCTA, the updated 2019 prediction model allows for a more precise estimation of pre-test probabilities of obstructive CAD than the previous model. Adoption of this new score may improve disease prediction and change the downstream diagnostic pathway in a significant proportion of cases.
Graph 1
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- P Lopes
- Hospital Santa Cruz, Carnaxide, Portugal
| | | | - P Freitas
- Hospital Santa Cruz, Carnaxide, Portugal
| | - B Rocha
- Hospital Santa Cruz, Carnaxide, Portugal
| | - G Cunha
- Hospital Santa Cruz, Carnaxide, Portugal
| | - G Mendes
- Hospital Santa Cruz, Carnaxide, Portugal
| | - J Abecasis
- Hospital Santa Cruz, Carnaxide, Portugal
| | - A Santos
- Hospital Santa Cruz, Carnaxide, Portugal
| | - C Saraiva
- Hospital Santa Cruz, Carnaxide, Portugal
| | - M Mendes
- Hospital Santa Cruz, Carnaxide, Portugal
| | - A Ferreira
- Hospital Santa Cruz, Carnaxide, Portugal
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Sa Mendes G, Abecasis J, Ferreira A, Ribeiras R, Saraiva C, Ferreira S, Gil V, Andrade M, Mendes M, Neves J, Campante Teles R, Goncalves P. LV replacement fibrosis in aortic stenosis: prevalence and relation to LV remodelling and function. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1867] [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
Background
Progressive myocardial fibrosis takes part in left ventricular (LV) remodeling in aortic stenosis (AS) and drives the transition from hypertrophy to heart failure. Replacement fibrosis may be characterized by late gadolinium enhancement (LGE) in cardiac magnetic resonance (CMR).
Aim
To assess the prevalence and association between LGE and indexes of LV function in patients with severe aortic stenosis.
Methods
We prospectively studied 53 consecutive patients (age: 71±8 years [min. 51–max. 84], 54.7% men) with severe symptomatic AS, referred for surgical aortic valve replacement with no previous history of ischemic cardiomyopathy. Aortic valve mean gradient was 54.6 mmHg [IQR 46.6–63.2] and aortic valve area 0.74cm2 [IQR 0.61–0.89]; all patients with high gradient, 4 with low-flow. CMR with tissue characterization (T1 mapping, LGE and extracellular volume by ECV quantification – using 5SD from remote myocardium as signal intensity cut-off), was performed before surgery. AS severity indexes, LV mass, systolic and diastolic LV function indexes including global longitudinal strain (GLS) and torsion were compared in both groups of patients, with and without LGE.
Results
Mid-wall LGE was present in 36 patients (67.9%) with a median fraction of 6.0% [IQR 4.9–12.7%] of LV mass. Native T1 value and ECV were within normal ranges (median values: 1047ms [IQR 1028–1084]; 22% [IQR 18–25], respectively). Median CMR LV ejection fraction and mass were 64.5% [IQR 51.3–70.8%] (11 patients with reduced EF) and 76.5g/m2 [IQR 57.4–94.8g/m2], respectively. Median GLS was −13.9% [IQR −11.4 to −17.0%] and torsion was 24.2° [IQR 19.8–32.5°]. Patients with LGE had significantly higher LV mass (87.1g/m2 vs 63.3 g/m2, p=0.001), worse GLS (−14.4% vs −16.9%, p=0.041) and higher NT-proBNP values (1333.7ng/mL vs 559.9ng/mL, p=0.004) (Figure).
Conclusions
Non-ischemic LGE is common in this group of patients with severe symptomatic high gradient aortic stenosis. As it is more prevalent in patients with more pronounced LVH, lower longitudinal deformation and higher NT-proBNP values, it probably represents a more advanced stage of the disease.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
| | - J Abecasis
- Hospital de Santa Cruz, Carnaxide, Portugal
| | - A Ferreira
- Hospital de Santa Cruz, Carnaxide, Portugal
| | - R Ribeiras
- Hospital de Santa Cruz, Carnaxide, Portugal
| | - C Saraiva
- Hospital de Santa Cruz, Carnaxide, Portugal
| | - S Ferreira
- Hospital de Santa Cruz, Carnaxide, Portugal
| | - V Gil
- Hospital de Santa Cruz, Carnaxide, Portugal
| | | | - M Mendes
- Hospital de Santa Cruz, Carnaxide, Portugal
| | - J.P Neves
- Hospital de Santa Cruz, Carnaxide, Portugal
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Felix-Oliveira A, Campante Teles R, Ferreira A, Brito J, Goncalves PA, Raposo L, Gabriel HM, Nolasco T, Cunha G, Abecasis J, Saraiva C, Almeida MS, Mendes M. P3382Vascular calcium Index: an imaging tool to predict vascular complications and major bleeding in TF-TAVI. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz745.0258] [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: 11/14/2022] Open
Abstract
Abstract
Introduction
Vascular calcification has been associated with worse outcomes in transfemoral TAVI (TF-TAVI). However, there is currently no simple method to assess it and identify different patterns of calcification in an objective and quantitative manner. The purpose of this study was to develop a quantitative score of aortic (Ao) and ileofemural (IF) calcification and to assess its ability to predict life-threatening bleeding (LTB) and major vascular complications during TF-TAVI.
Methods
Case-control single center retrospective study of patients undergoing TF-TAVI between Nov2015 and Aug2018 including 183 consecutive patients (99 women, mean age 83±3 years, mean Euroscore II - ESII - 6.0±4.1). The Vascular Calcium Score was calculated for the entire Ao and IF vessels using a modified Agatston score derived from contrast-enhanced CT images, with calcium threshold locally adjusted for luminal attenuation (mean attenuation + 5x SD). A luminal attenuation threshold >600UH impaired vascular calcium evaluation and patients were excluded. LTB and major vascular complications were adjudicated according to the VARC-2 classification and identified by chart review by and independent team.
Results
Thirty patients (16%) suffered major bleeding and 13 (7%) experienced LTB. Major vascular injury occurred in 11 patients (6%). The median total vascular calcium score (TCS) was 11752 AU (IQR: 6388–19844) and median IF score (IFS) was 2210AU (IQR: 865–4170). TCS indexed for body surface area (TCSi) was predictor of LTB (AUC: 0.78±0.07, p<0.05) and of major vascular complications (AUC: 0.85±0.05, p<0.05). After multivariate analysis, iTCS and glomerular filtration rate (GFR) remained as predictors of LTB with an HR of 1.11 for each increase in 1000UA/m2 of TCSi (95% CI: 1.03–1.18) and 0.94 (95% CI: 0.88–0.985) respectively, independently of the ESII. iTCS and GFR were also independently associated with major vascular complications (p<0.05). Patients with an iTCS above 9750AU/m2 have an odds ratio of 7.7 (95% CI: 2.0 - 29.2) for LTB. This cut-off has a sensitivity of 77% and a specificity of 70% for LTB. Similarly, patients with an iTCS above 9750AU/m2 have an odds ratio of 10.3 (95% CI: 22 - 49.3) for major vascular injury.
Conclusions
A quantitative score for vascular calcification in contrast-enhanced CT images was developed. iTCS was independently associated with life-threatening bleeding and major vascular complications.
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Affiliation(s)
| | | | - A Ferreira
- Hospital de Santa Cruz, Cardiology, Lisbon, Portugal
| | - J Brito
- Hospital de Santa Cruz, Cardiology, Lisbon, Portugal
| | - P A Goncalves
- Hospital de Santa Cruz, Cardiology, Lisbon, Portugal
| | - L Raposo
- Hospital de Santa Cruz, Cardiology, Lisbon, Portugal
| | - H M Gabriel
- Hospital de Santa Cruz, Cardiology, Lisbon, Portugal
| | - T Nolasco
- Hospital Santa Cruz, Cardiac Surgery, Carnaxide, Portugal
| | - G Cunha
- Hospital de Santa Cruz, Cardiology, Lisbon, Portugal
| | - J Abecasis
- Hospital de Santa Cruz, Cardiology, Lisbon, Portugal
| | - C Saraiva
- Hospital de Santa Cruz, Cardiology, Lisbon, Portugal
| | - M S Almeida
- Hospital de Santa Cruz, Cardiology, Lisbon, Portugal
| | - M Mendes
- Hospital de Santa Cruz, Cardiology, Lisbon, Portugal
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Nascimento Matos DJ, Ferreira AM, Freitas P, Guerreiro S, Carmo J, Abecasis J, Costa F, Santos AC, Carmo P, Saraiva C, Cavaco D, Morgado F, Mendes M, Adragao P. 1204Pericardial fat volume outperforms classic risk markers in the prediction of relapse after pulmonary vein isolation. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.0034] [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
Introduction
Pericardial adipose tissue has been implicated in the pathophysiology of atrial fibrillation (AF), but its relevance to clinical practice remains uncertain. The aim of this study was to assess the relative importance of pericardial fat as predictor of recurrence after pulmonary vein isolation (PVI).
Methods
We assessed 453 patients (278 men, age 61±13 years, 348 paroxysmal AF) with symptomatic AF undergoing cardiac CT prior to a PVI procedure. Pericardial fat was quantified on contrast-enhanced images using a new simplified semi-automated method. The study endpoint was symptomatic and/or documented AF recurrence.
Results
Over a median follow-up of 14 months (IQR 7–23), 170 patients (38%) relapsed. Survival analysis showed significant differences in AF-free survival across tertiles of pericardial fat (Figure). Pericardial fat volume was weakly correlated to body mass index [(BMI), Pearson's R=0.34]. After adjustment for BMI and other univariate predictors of relapse, three variables emerged independently associated with time to AF recurrence: non-paroxysmal AF (HR 2.08, 95% CI: 1.51–2.87, p<0.001), indexed left atrial (LA) volume (HR 1.02 per mL/m2, 95% CI: 1.01–1.02, p<0.001), and indexed pericardial fat volume (HR 1.50 per mL/m2, 95% CI: 1.37–1.64, p<0.001). Based on the Wald test, indexed pericardial fat volume was the strongest of these predictors of relapse (X2 values of 20, 13, and 77, respectively). The population attributable risk (PAF) was higher for pericardial fat (PAF=37% for 1st vs 4th quartile) vs LA volume (PAF=11% for 1st quartile vs 4th quartile) and non-paroxysmal AF (PAF=23%). Pericardial fat volume also showed greater discriminate power than indexed LA volume, with a C-statistic of 0.80 (95% CI 0.76–0.85) vs. 0.61 (95% CI 0.55–0.66), p for difference <0.001. The method for quantifying pericardial fat showed high inter-observer reproducibility (Pearson's R=0.90) and was quick to perform (38±3 seconds).
Conclusion
Pericardial fat volume is a strong independent predictor of AF relapse after PVI, outperforming classic risk markers such as LA volume and type of AF. The underlying mechanisms of this association deserve further study. Meanwhile, this simple parameter may help select patients who are more likely to derive sustained benefit from AF ablation.
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Affiliation(s)
| | - A M Ferreira
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - P Freitas
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - S Guerreiro
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - J Carmo
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - J Abecasis
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - F Costa
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - A C Santos
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - P Carmo
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - C Saraiva
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - D Cavaco
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - F Morgado
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - M Mendes
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - P Adragao
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
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Nascimento Matos DJ, Ferreira AM, Gama F, Tralhao A, Abecasis J, Guerreiro S, Freitas P, Cardoso G, Saraiva C, Goncalves P, Marques H, Mendes M. P1773Impact of coronary artery calcium score on cardiovascular risk stratification: a multicenter analysis. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p1773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
| | - A M Ferreira
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - F Gama
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - A Tralhao
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - J Abecasis
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - S Guerreiro
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - P Freitas
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - G Cardoso
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - C Saraiva
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - P Goncalves
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - H Marques
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
| | - M Mendes
- Hospital Santa Cruz, Cardiology, Carnaxide, Portugal
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41
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Augusto Goncalves M, Silva C, Abecasis J, Guerreiro S, Freitas P, Oliveira A, Ferreira A, Saraiva C, Ribeiras R, Cardoso G, Mendes M. P6318Mitral annulus calcification: predictors and outcomes in patients with interventioned severe aortic stenosis. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p6318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
| | - C Silva
- Hospital de Santa Cruz, Lisbon, Portugal
| | - J Abecasis
- Hospital de Santa Cruz, Lisbon, Portugal
| | | | - P Freitas
- Hospital de Santa Cruz, Lisbon, Portugal
| | - A Oliveira
- Hospital de Santa Cruz, Lisbon, Portugal
| | - A Ferreira
- Hospital de Santa Cruz, Lisbon, Portugal
| | - C Saraiva
- Hospital de Santa Cruz, Lisbon, Portugal
| | - R Ribeiras
- Hospital de Santa Cruz, Lisbon, Portugal
| | - G Cardoso
- Hospital de Santa Cruz, Lisbon, Portugal
| | - M Mendes
- Hospital de Santa Cruz, Lisbon, Portugal
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Felix-Oliveira A, Campante Teles R, Ferreira A, Tralhao A, Freitas P, Neto M, Mendes GS, Brizido C, Gama F, Abecasis J, Saraiva C, Brito J, Goncalves P, Almeida M, Mendes M. P2259Vascular calcium score: new imaging tool for prediction of major and life-threatening bleeding events in trans-femoral TAVI. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p2259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- A Felix-Oliveira
- Hospital de Santa Cruz, Department of Cardiology, Lisbon, Portugal
| | - R Campante Teles
- Hospital de Santa Cruz, Department of Cardiology, Lisbon, Portugal
| | - A Ferreira
- Hospital de Santa Cruz, Department of Cardiology, Lisbon, Portugal
| | - A Tralhao
- Hospital de Santa Cruz, Department of Cardiology, Lisbon, Portugal
| | - P Freitas
- Hospital de Santa Cruz, Department of Cardiology, Lisbon, Portugal
| | - M Neto
- Hospital Funchal, Department of Cardiology, Funchal, Portugal
| | - G S Mendes
- Hospital de Santa Cruz, Department of Cardiology, Lisbon, Portugal
| | - C Brizido
- Hospital de Santa Cruz, Department of Cardiology, Lisbon, Portugal
| | - F Gama
- Hospital de Santa Cruz, Department of Cardiology, Lisbon, Portugal
| | - J Abecasis
- Hospital de Santa Cruz, Department of Cardiology, Lisbon, Portugal
| | - C Saraiva
- Hospital de Santa Cruz, Department of Cardiology, Lisbon, Portugal
| | - J Brito
- Hospital de Santa Cruz, Department of Cardiology, Lisbon, Portugal
| | - P Goncalves
- Hospital de Santa Cruz, Department of Cardiology, Lisbon, Portugal
| | - M Almeida
- Hospital de Santa Cruz, Department of Cardiology, Lisbon, Portugal
| | - M Mendes
- Hospital de Santa Cruz, Department of Cardiology, Lisbon, Portugal
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Silva C, Goncalves M, Guerreiro S, Abecassis J, Ribeiras R, Andrade M, Cardoso G, Saraiva C, Ferreira A, Mendes M. P6054Calcium score of the mitral valve assessed by CT angiography correlates with the severity of mitral regurgitation and mitral valve area in patients with severe aortic stenosis. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p6054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- C Silva
- Hospital de Santa Cruz, Lisbon, Portugal
| | | | | | | | - R Ribeiras
- Hospital de Santa Cruz, Lisbon, Portugal
| | - M Andrade
- Hospital de Santa Cruz, Lisbon, Portugal
| | - G Cardoso
- Hospital de Santa Cruz, Lisbon, Portugal
| | - C Saraiva
- Hospital de Santa Cruz, Lisbon, Portugal
| | - A Ferreira
- Hospital de Santa Cruz, Lisbon, Portugal
| | - M Mendes
- Hospital de Santa Cruz, Lisbon, Portugal
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Saraiva C, Talhada D, Rai A, Ferreira R, Ferreira L, Bernardino L, Ruscher K. MicroRNA-124-loaded nanoparticles increase survival and neuronal differentiation of neural stem cells in vitro but do not contribute to stroke outcome in vivo. PLoS One 2018; 13:e0193609. [PMID: 29494665 PMCID: PMC5832317 DOI: 10.1371/journal.pone.0193609] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [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: 11/14/2017] [Accepted: 02/14/2018] [Indexed: 01/08/2023] Open
Abstract
There is a high quest for novel therapeutic strategies to enhance recovery after stroke. MicroRNA-124 (miR-124) has been described as neuroprotective and anti-inflammatory molecule. Moreover, miR-124 is a well described enhancer of adult neurogenesis that could offer potentially beneficial effects. Herein, we used miR-124-loaded nanoparticles (miR-124 NPs) to evaluate their therapeutic potential in an in vitro and in vivo model of stroke. For that, neuroprotective and neurogenic responses were assessed in an in vitro model of stroke. Here, we found that miR-124 NPs decreased cell death and improved neuronal differentiation of subventricular zone (SVZ) neural stem cell cultures after oxygen and glucose deprivation. In contrast, intravenous injection of miR-124 NPs immediately after permanent focal ischemia induced by photothrombosis (PT) did not provide a better neurological outcome. In addition, treatment did not affect the number of 5-bromo-2'-deoxyuridine (BrdU)- and doublecortin/BrdU- positive cells in the SVZ at the study endpoint of 14 days after PT. Likewise, the ischemic insult did not affect the numbers of neuronal progenitors in the SVZ. However, in PT mice miR-124 NPs were able to specifically augment interleukin-6 levels at day 2 post-stroke. Furthermore, we also showed that NPs reached the brain parenchyma and were internalized by brain resident cells. Although, promising in vitro data could not be verified in vivo as miR-124 NPs treatment did not improve functional outcome nor presented beneficial actions on neurogenesis or post-stroke inflammation, we showed that our NP formulation can be a safe alternative for drug delivery into the brain.
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Affiliation(s)
- Cláudia Saraiva
- Health Sciences Research Centre, Faculty of Health Sciences, University of Beira Interior, Covilhã, Portugal
- Laboratory for Experimental Brain Research, Division of Neurosurgery, Department of Clinical Sciences, Wallenberg Neuroscience Center, Lund University, Lund, Sweden
- Departamento de Química, Faculdade de Ciências e Tecnologia da, Universidade Nova de Lisboa, Caparica, Portugal
| | - Daniela Talhada
- Health Sciences Research Centre, Faculty of Health Sciences, University of Beira Interior, Covilhã, Portugal
- Laboratory for Experimental Brain Research, Division of Neurosurgery, Department of Clinical Sciences, Wallenberg Neuroscience Center, Lund University, Lund, Sweden
| | - Akhilesh Rai
- CNC - Center for Neuroscience and Cell Biology, Coimbra, Portugal
| | - Raquel Ferreira
- Health Sciences Research Centre, Faculty of Health Sciences, University of Beira Interior, Covilhã, Portugal
| | - Lino Ferreira
- CNC - Center for Neuroscience and Cell Biology, Coimbra, Portugal
- Faculty of Medicine, University of Coimbra (IIIUC), Coimbra, Portugal
| | - Liliana Bernardino
- Health Sciences Research Centre, Faculty of Health Sciences, University of Beira Interior, Covilhã, Portugal
- * E-mail: (LB); (KR)
| | - Karsten Ruscher
- Laboratory for Experimental Brain Research, Division of Neurosurgery, Department of Clinical Sciences, Wallenberg Neuroscience Center, Lund University, Lund, Sweden
- * E-mail: (LB); (KR)
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Miguéis S, Saraiva C, Esteves A. Efficacy of LISTEX P100 at Different Concentrations for Reduction of Listeria monocytogenes Inoculated in Sashimi. J Food Prot 2017; 80:2094-2098. [PMID: 29166172 DOI: 10.4315/0362-028x.jfp-17-098] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [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: 11/11/2022]
Abstract
Sushi restaurants have become quite popular in Europe, with an increase in the consumption of the sashimi speciality. Pathogenic bacteria such as Listeria monocytogenes, Staphylococcus aureus, and Bacillus cereus have been reported in this kind of food. Controlling the presence and multiplication of L. monocytogenes is a challenge for food safety management systems owing to its ubiquitous presence and psychrotrophic growth. Bacteriophages have been used as pathogenic biocide agents for decades. The bacteriophage P100, present in LISTEX P100, was used in this study to understand the possibility of implementing a new critical control point for L. monocytogenes in sashimi preparation and sale. Different concentrations of LISTEX P100 were used for reduction of L. monocytogenes in inoculated samples at 3 and 22°C. The reduction in initial counts of 2 log CFU/g was effective in the first 24 h with the 8-log PFU/g inoculation. Promising results were obtained in assays with the 6-log CFU/g initial counts and the 8-log PFU/g inoculation, at 22°C, achieving a maximum reduction of 4.44 log CFU/g, compared with the control group. These results seem to confirm that bacteriophages can be an option in reducing the population of the L. monocytogenes pathogenic bacteria in sashimi, mainly in takeaway sales.
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Affiliation(s)
- S Miguéis
- School of Agrarian and Veterinary Sciences, Animal and Veterinary Research Centre, University of Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal (ORCID: http://orcid.org/0000-0003-4521-2202 [S.M.])
| | - C Saraiva
- School of Agrarian and Veterinary Sciences, Animal and Veterinary Research Centre, University of Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal (ORCID: http://orcid.org/0000-0003-4521-2202 [S.M.])
| | - A Esteves
- School of Agrarian and Veterinary Sciences, Animal and Veterinary Research Centre, University of Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal (ORCID: http://orcid.org/0000-0003-4521-2202 [S.M.])
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Saraiva C, Esteves M, Bernardino L. MicroRNA: Basic concepts and implications for regeneration and repair of neurodegenerative diseases. Biochem Pharmacol 2017; 141:118-131. [DOI: 10.1016/j.bcp.2017.07.008] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 07/07/2017] [Indexed: 12/25/2022]
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Santos T, Ferreira R, Quartin E, Boto C, Saraiva C, Bragança J, Peça J, Rodrigues C, Ferreira L, Bernardino L. Blue light potentiates neurogenesis induced by retinoic acid-loaded responsive nanoparticles. Acta Biomater 2017; 59:293-302. [PMID: 28673742 DOI: 10.1016/j.actbio.2017.06.044] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Revised: 06/21/2017] [Accepted: 06/28/2017] [Indexed: 01/18/2023]
Abstract
Neurogenic niches constitute a powerful endogenous source of new neurons that can be used for brain repair strategies. Neuronal differentiation of these cells can be regulated by molecules such as retinoic acid (RA) or by mild levels of reactive oxygen species (ROS) that are also known to upregulate RA receptor alpha (RARα) levels. Data showed that neural stem cells from the subventricular zone (SVZ) exposed to blue light (405nm laser) transiently induced NADPH oxidase-dependent ROS, resulting in β-catenin activation and neuronal differentiation, and increased RARα levels. Additionally, the same blue light stimulation was capable of triggering the release of RA from light-responsive nanoparticles (LR-NP). The synergy between blue light and LR-NP led to amplified neurogenesis both in vitro and in vivo, while offering a temporal and spatial control of RA release. In conclusion, this combinatory treatment offers great advantages to potentiate neuronal differentiation, and provides an innovative and efficient application for brain regenerative therapies. STATEMENT OF SIGNIFICANCE Controlling the differentiation of stem cells would support the development of promising brain regenerative therapies. Blue light transiently increased reactive oxygen species, resulting in neuronal differentiation and increased retinoic acid receptor (RARα) levels. Additionally, the same blue light stimulation was capable of triggering the release of RA from light-responsive nanoparticles (LR-NP). The synergy between blue light and LR-NP led to amplified neurogenesis, while offering a temporal and spatial control of RA release. In this sense, our approach relying on the modulation of endogenous stem cells for the generation of new neurons may support the development of novel clinical therapies.
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Affiliation(s)
- Tiago Santos
- Health Sciences Research Centre (CICS-UBI), University of Beira Interior, Rua Marquês d'Ávila e Bolama, 6201-001 Covilhã, Portugal
| | - Raquel Ferreira
- Health Sciences Research Centre (CICS-UBI), University of Beira Interior, Rua Marquês d'Ávila e Bolama, 6201-001 Covilhã, Portugal
| | - Emanuel Quartin
- Biocant - Center of Innovation in Biotechnology, 3060-197 Cantanhede, Portugal
| | - Carlos Boto
- Biocant - Center of Innovation in Biotechnology, 3060-197 Cantanhede, Portugal
| | - Cláudia Saraiva
- Health Sciences Research Centre (CICS-UBI), University of Beira Interior, Rua Marquês d'Ávila e Bolama, 6201-001 Covilhã, Portugal
| | - José Bragança
- Institute for Biotechnology and Bioengineering, Centre for Molecular and Structural Biomedicine (CBME), University of Algarve, 8005-139 Faro, Portugal
| | - João Peça
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal; Institute for Interdisciplinary Research, Faculty of Medicine, University of Coimbra (IIIUC), 3030-789 Coimbra, Portugal
| | - Cecília Rodrigues
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, University of Lisbon, Lisbon, Portugal
| | - Lino Ferreira
- Biocant - Center of Innovation in Biotechnology, 3060-197 Cantanhede, Portugal; CNC - Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517 Coimbra, Portugal; Institute for Interdisciplinary Research, Faculty of Medicine, University of Coimbra (IIIUC), 3030-789 Coimbra, Portugal
| | - Liliana Bernardino
- Health Sciences Research Centre (CICS-UBI), University of Beira Interior, Rua Marquês d'Ávila e Bolama, 6201-001 Covilhã, Portugal.
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Mesquita J, Ferreira A, Guerreiro S, Abecasis J, Saraiva C, Rodrigues G, Goncalves M, Bento D, Costa F, Cavaco D, Adragao P, Mendes M. P3578Female gender is an independent determinant of left atrial fibrosis assessed by cardiovascular magnetic resonance. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p3578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Mesquita J, Ferreira A, Guerreiro S, Abecasis J, Saraiva C, Rodrigues G, Goncalves M, Bento D, Costa F, Carmo P, Morgado F, Cavaco D, Adragao P, Mendes M. P3576Correlation between late gadolinium enhancement assessment of atrial scar and low voltage areas detected by endocardial voltage mapping. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p3576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Freitas P, Ferreira A, Abecasis J, Marques H, Saraiva C, Matos D, Rodrigues R, Cardim N, Gil V, Mendes M. 4786Discordance between the criteria for ICD implantation in the primary prevention of sudden death among patients with hypertrophic cardiomyopathy. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.4786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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