1
|
Abrantes R, Pimentel V, Miranda MNS, Silva AR, Diniz A, Ascenção B, Piñeiro C, Koch C, Rodrigues C, Caldas C, Morais C, Faria D, Gomes da Silva E, Teófilo E, Monteiro F, Roxo F, Maltez F, Rodrigues F, Gaião G, Ramos H, Costa I, Germano I, Simões J, Oliveira J, Ferreira J, Poças J, Saraiva da Cunha J, Soares J, Fernandes S, Mansinho K, Pedro L, Aleixo MJ, Gonçalves MJ, Manata MJ, Mouro M, Serrado M, Caixeiro M, Marques N, Costa O, Pacheco P, Proença P, Rodrigues P, Pinho R, Tavares R, Correia de Abreu R, Côrte-Real R, Serrão R, Sarmento e Castro R, Nunes S, Faria T, Baptista T, Simões D, Mendão L, Martins MRO, Gomes P, Pingarilho M, Abecasis AB. Determinants of HIV late presentation among men who have sex with men in Portugal (2014-2019): who's being left behind? Front Public Health 2024; 12:1336845. [PMID: 38500732 PMCID: PMC10947991 DOI: 10.3389/fpubh.2024.1336845] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Accepted: 01/26/2024] [Indexed: 03/20/2024] Open
Abstract
Introduction HIV late presentation (LP) remains excessive in Europe. We aimed to analyze the factors associated with late presentation in the MSM population newly diagnosed with HIV in Portugal between 2014 and 2019. Methods We included 391 newly HIV-1 diagnosed Men who have Sex with Men (MSM), from the BESTHOPE project, in 17 countrywide Portuguese hospitals. The data included clinical and socio-behavioral questionnaires and the viral genomic sequence obtained in the drug resistance test before starting antiretrovirals (ARVs). HIV-1 subtypes and epidemiological surveillance mutations were determined using different bioinformatics tools. Logistic regression was used to estimate the association between predictor variables and late presentation (LP). Results The median age was 31 years, 51% had a current income between 501-1,000 euros, 28% were migrants. 21% had never been tested for HIV before diagnosis, with 42.3% of MSM presenting LP. 60% were infected with subtype B strains. In the multivariate regression, increased age at diagnosis, higher income, lower frequency of screening, STI ever diagnosed and higher viral load were associated with LP. Conclusion Our study suggests that specific subgroups of the MSM population, such older MSM, with higher income and lower HIV testing frequency, are not being targeted by community and clinical screening services. Overall, targeted public health measures should be strengthened toward these subgroups, through strengthened primary care testing, expanded access to PrEP, information and promotion of HIV self-testing and more inclusive and accessible health services.
Collapse
Affiliation(s)
- Ricardo Abrantes
- Global Health and Tropical Medicine (GHTM), Associate Laboratory in Translation and Innovation Towards Global Health (LA-REAL), Institute of Hygiene and Tropical Medicine, NOVA University of Lisbon (IHMT/UNL), Lisbon, Portugal
| | - Victor Pimentel
- Global Health and Tropical Medicine (GHTM), Associate Laboratory in Translation and Innovation Towards Global Health (LA-REAL), Institute of Hygiene and Tropical Medicine, NOVA University of Lisbon (IHMT/UNL), Lisbon, Portugal
| | - Mafalda N. S. Miranda
- Global Health and Tropical Medicine (GHTM), Associate Laboratory in Translation and Innovation Towards Global Health (LA-REAL), Institute of Hygiene and Tropical Medicine, NOVA University of Lisbon (IHMT/UNL), Lisbon, Portugal
| | - Ana Rita Silva
- Serviço de Infeciologia, Hospital Beatriz Ângelo, Loures, Portugal
| | - António Diniz
- U. Imunodeficiência, Hospital Pulido Valente, Centro Hospitalar Universitário de Lisboa Norte, Lisbon, Portugal
| | - Bianca Ascenção
- Serviço de Infeciologia, Centro Hospitalar de Setúbal, Setúbal, Portugal
| | - Carmela Piñeiro
- Serviço de Doenças Infeciosas, Centro Hospitalar Universitário de São João, Porto, Portugal
| | - Carmo Koch
- Centro de Biologia Molecular, Serviço de Imunohemoterapia do Centro Hospitalar Universitário de São João, Porto, Portugal
| | - Catarina Rodrigues
- Serviço de Medicina 1.4, Hospital de São José, Centro Hospitalar Universitário de Lisboa Central, Lisbon, Portugal
| | - Cátia Caldas
- Serviço de Doenças Infeciosas, Centro Hospitalar Universitário de São João, Porto, Portugal
| | - Célia Morais
- Serviço de Patologia Clínica, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
| | - Domitília Faria
- Serviço de Medicina 3, Hospital de Portimão, Centro Hospitalar Universitário do Algarve, Portimão, Portugal
| | | | - Eugénio Teófilo
- Serviço de Medicina 2.3, Hospital de Santo António dos Capuchos, Centro Hospitalar de Lisboa Central, Lisbon, Portugal
| | - Fátima Monteiro
- Centro de Biologia Molecular, Serviço de Imunohemoterapia do Centro Hospitalar Universitário de São João, Porto, Portugal
| | - Fausto Roxo
- Hospital de Dia de Doenças Infeciosas, Hospital Distrital de Santarém, Santarém, Portugal
| | - Fernando Maltez
- Serviço de Doenças Infeciosas, Hospital Curry Cabral, Centro Hospitalar de Lisboa, Lisbon, Portugal
| | - Fernando Rodrigues
- Serviço de Patologia Clínica, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
| | - Guilhermina Gaião
- Serviço de Patologia Clínica, Hospital de Sta Maria, Centro Hospitalar Universitário de Lisboa Norte, Lisbon, Portugal
| | - Helena Ramos
- Serviço de Patologia Clínica, Centro Hospitalar do Porto, Porto, Portugal
| | - Inês Costa
- Laboratório de Biologia Molecular (LMCBM, SPC, CHLO-HEM), Lisbon, Portugal
| | - Isabel Germano
- Serviço de Medicina 1.4, Hospital de São José, Centro Hospitalar Universitário de Lisboa Central, Lisbon, Portugal
| | - Joana Simões
- Serviço de Medicina 1.4, Hospital de São José, Centro Hospitalar Universitário de Lisboa Central, Lisbon, Portugal
| | - Joaquim Oliveira
- Serviço de Infeciologia, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
| | - José Ferreira
- Serviço de Medicina 2, Hospital de Faro, Centro Hospitalar Universitário do Algarve, Faro, Portugal
| | - José Poças
- Serviço de Infeciologia, Centro Hospitalar de Setúbal, Setúbal, Portugal
| | - José Saraiva da Cunha
- Serviço de Infeciologia, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
| | - Jorge Soares
- Serviço de Doenças Infeciosas, Centro Hospitalar Universitário de São João, Porto, Portugal
| | - Sandra Fernandes
- Laboratório de Biologia Molecular (LMCBM, SPC, CHLO-HEM), Lisbon, Portugal
| | - Kamal Mansinho
- Serviço de Doenças Infeciosas, Hospital de Egas Moniz, Centro Hospitalar de Lisboa Ocidental, Lisbon, Portugal
| | - Liliana Pedro
- Serviço de Medicina 3, Hospital de Portimão, Centro Hospitalar Universitário do Algarve, Portimão, Portugal
| | | | | | - Maria José Manata
- Serviço de Doenças Infeciosas, Hospital Curry Cabral, Centro Hospitalar de Lisboa, Lisbon, Portugal
| | - Margarida Mouro
- Serviço de Infeciologia, Hospital de Aveiro, Centro Hospitalar Baixo Vouga, Aveiro, Portugal
| | - Margarida Serrado
- U. Imunodeficiência, Hospital Pulido Valente, Centro Hospitalar Universitário de Lisboa Norte, Lisbon, Portugal
| | - Micaela Caixeiro
- Serviço de Infeciologia, Hospital Dr. Fernando da Fonseca, Amadora, Portugal
| | - Nuno Marques
- Serviço de Infeciologia, Hospital Garcia da Orta, Almada, Portugal
| | - Olga Costa
- Serviço de Patologia Clínica, Biologia Molecular, Centro Hospitalar Universitário de Lisboa Central, Lisbon, Portugal
| | - Patrícia Pacheco
- Serviço de Infeciologia, Hospital Dr. Fernando da Fonseca, Amadora, Portugal
| | - Paula Proença
- Serviço de Infeciologia, Hospital de Faro, Centro Hospitalar Universitário do Algarve, Faro, Portugal
| | - Paulo Rodrigues
- Serviço de Infeciologia, Hospital Beatriz Ângelo, Loures, Portugal
| | - Raquel Pinho
- Serviço de Medicina 3, Hospital de Portimão, Centro Hospitalar Universitário do Algarve, Portimão, Portugal
| | - Raquel Tavares
- Serviço de Infeciologia, Hospital Beatriz Ângelo, Loures, Portugal
| | - Ricardo Correia de Abreu
- Serviço de Infeciologia, Unidade de Local de Saúde de Matosinhos, Hospital Pedro Hispano, Matosinhos, Portugal
| | - Rita Côrte-Real
- Serviço de Patologia Clínica, Biologia Molecular, Centro Hospitalar Universitário de Lisboa Central, Lisbon, Portugal
| | - Rosário Serrão
- Serviço de Doenças Infeciosas, Centro Hospitalar Universitário de São João, Porto, Portugal
| | | | - Sofia Nunes
- Serviço de Infeciologia, Hospital de Aveiro, Centro Hospitalar Baixo Vouga, Aveiro, Portugal
| | - Telo Faria
- Unidade Local de Saúde do Baixo Alentejo, Hospital José Joaquim Fernandes, Beja, Portugal
| | - Teresa Baptista
- Serviço de Doenças Infeciosas, Hospital de Egas Moniz, Centro Hospitalar de Lisboa Ocidental, Lisbon, Portugal
| | - Daniel Simões
- Grupo de Ativistas em Tratamentos (GAT), Lisbon, Portugal
| | - Luis Mendão
- Grupo de Ativistas em Tratamentos (GAT), Lisbon, Portugal
| | - M. Rosário O. Martins
- Global Health and Tropical Medicine (GHTM), Associate Laboratory in Translation and Innovation Towards Global Health (LA-REAL), Institute of Hygiene and Tropical Medicine, NOVA University of Lisbon (IHMT/UNL), Lisbon, Portugal
| | - Perpétua Gomes
- Laboratório de Biologia Molecular (LMCBM, SPC, CHLO-HEM), Lisbon, Portugal
- Egas Moniz Center for Interdisciplinary Research (CiiEM), Egas Moniz School of Health & Science, Almada, Portugal
| | - Marta Pingarilho
- Global Health and Tropical Medicine (GHTM), Associate Laboratory in Translation and Innovation Towards Global Health (LA-REAL), Institute of Hygiene and Tropical Medicine, NOVA University of Lisbon (IHMT/UNL), Lisbon, Portugal
| | - Ana B. Abecasis
- Global Health and Tropical Medicine (GHTM), Associate Laboratory in Translation and Innovation Towards Global Health (LA-REAL), Institute of Hygiene and Tropical Medicine, NOVA University of Lisbon (IHMT/UNL), Lisbon, Portugal
| | | |
Collapse
|
2
|
Pingarilho M, Pimentel V, Miranda MNS, Silva AR, Diniz A, Ascenção BB, Piñeiro C, Koch C, Rodrigues C, Caldas C, Morais C, Faria D, da Silva EG, Teófilo E, Monteiro F, Roxo F, Maltez F, Rodrigues F, Gaião G, Ramos H, Costa I, Germano I, Simões J, Oliveira J, Ferreira J, Poças J, da Cunha JS, Soares J, Henriques J, Mansinho K, Pedro L, Aleixo MJ, Gonçalves MJ, Manata MJ, Mouro M, Serrado M, Caixeiro M, Marques N, Costa O, Pacheco P, Proença P, Rodrigues P, Pinho R, Tavares R, de Abreu RC, Côrte-Real R, Serrão R, Castro RSE, Nunes S, Faria T, Baptista T, Martins MRO, Gomes P, Mendão L, Simões D, Abecasis A. HIV-1-Transmitted Drug Resistance and Transmission Clusters in Newly Diagnosed Patients in Portugal Between 2014 and 2019. Front Microbiol 2022; 13:823208. [PMID: 35558119 PMCID: PMC9090520 DOI: 10.3389/fmicb.2022.823208] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Accepted: 03/21/2022] [Indexed: 11/13/2022] Open
Abstract
Objective To describe and analyze transmitted drug resistance (TDR) between 2014 and 2019 in newly infected patients with HIV-1 in Portugal and to characterize its transmission networks. Methods Clinical, socioepidemiological, and risk behavior data were collected from 820 newly diagnosed patients in Portugal between September 2014 and December 2019. The sequences obtained from drug resistance testing were used for subtyping, TDR determination, and transmission cluster (TC) analyses. Results In Portugal, the overall prevalence of TDR between 2014 and 2019 was 11.0%. TDR presented a decreasing trend from 16.7% in 2014 to 9.2% in 2016 (p for-trend = 0.114). Multivariate analysis indicated that TDR was significantly associated with transmission route (MSM presented a lower probability of presenting TDR when compared to heterosexual contact) and with subtype (subtype C presented significantly more TDR when compared to subtype B). TC analysis corroborated that the heterosexual risk group presented a higher proportion of TDR in TCs when compared to MSMs. Among subtype A1, TDR reached 16.6% in heterosexuals, followed by 14.2% in patients infected with subtype B and 9.4% in patients infected with subtype G. Conclusion Our molecular epidemiology approach indicates that the HIV-1 epidemic in Portugal is changing among risk group populations, with heterosexuals showing increasing levels of HIV-1 transmission and TDR. Prevention measures for this subpopulation should be reinforced.
Collapse
Affiliation(s)
- Marta Pingarilho
- Global Health and Tropical Medicine (GHTM), Instituto de Higiene e Medicina Tropical (IHMT), Universidade Nova de Lisboa (UNL), Lisbon, Portugal
| | - Victor Pimentel
- Global Health and Tropical Medicine (GHTM), Instituto de Higiene e Medicina Tropical (IHMT), Universidade Nova de Lisboa (UNL), Lisbon, Portugal
| | - Mafalda N S Miranda
- Global Health and Tropical Medicine (GHTM), Instituto de Higiene e Medicina Tropical (IHMT), Universidade Nova de Lisboa (UNL), Lisbon, Portugal
| | - Ana Rita Silva
- Serviço de Infeciologia, Hospital Beatriz Ângelo, Loures, Portugal
| | - António Diniz
- Unidade de Imunodeficiência, Centro Hospitalar Universitário Lisboa Norte - HPV, Lisbon, Portugal
| | | | - Carmela Piñeiro
- Serviço de Doenças Infeciosas, Centro Hospitalar Universitário de São João, Porto, Portugal
| | - Carmo Koch
- Centro de Biologia Molecular, Serviço de Imunohemoterapia do Centro Hospitalar Universitário de São João, Porto, Portugal
| | - Catarina Rodrigues
- Serviço de Medicina, Hospital de São José, Centro Hospitalar Universitário de Lisboa Central, Lisbon, Portugal
| | - Cátia Caldas
- Serviço de Doenças Infeciosas, Centro Hospitalar Universitário de São João, Porto, Portugal
| | - Célia Morais
- Serviço de Patologia Clínica, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
| | - Domitília Faria
- Serviço de Medicina, Hospital de Portimão, Centro Hospitalar Universitário do Algarve, Portimão, Portugal
| | | | - Eugénio Teófilo
- Serviço de Medicina, Hospital de Santo António dos Capuchos, Centro Hospitalar Universitário de Lisboa Central, Lisbon, Portugal
| | - Fátima Monteiro
- Centro de Biologia Molecular, Serviço de Imunohemoterapia do Centro Hospitalar Universitário de São João, Porto, Portugal
| | - Fausto Roxo
- Hospital de Dia de Doenças Infeciosas, Hospital Distrital de Santarém, Santarém, Portugal
| | - Fernando Maltez
- Serviço de Doenças Infeciosas, Hospital de Curry Cabral, Centro Hospitalar Universitário de Lisboa Central, Lisbon, Portugal
| | - Fernando Rodrigues
- Serviço de Patologia Clínica, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
| | - Guilhermina Gaião
- Serviço de Patologia Clínica, Hospital de Santa Maria, Centro Hospitalar Universitário de Lisboa Norte, Lisbon, Portugal
| | - Helena Ramos
- Serviço de Patologia Clínica, Centro Hospitalar do Porto, Porto, Portugal
| | - Inês Costa
- Laboratório de Biologia Molecular (LMCBM, SPC, CHLO-HEM), Lisbon, Portugal
| | - Isabel Germano
- Serviço de Medicina, Hospital de São José, Centro Hospitalar Universitário de Lisboa Central, Lisbon, Portugal
| | - Joana Simões
- Serviço de Medicina, Hospital de São José, Centro Hospitalar Universitário de Lisboa Central, Lisbon, Portugal
| | - Joaquim Oliveira
- Serviço de Doenças, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
| | - José Ferreira
- Serviço de Medicina, Hospital de Faro, Centro Hospitalar Universitário do Algarve, Faro, Portugal
| | - José Poças
- Serviço de Infeciologia, Centro Hospitalar de Setúbal, Setúbal, Portugal
| | | | - Jorge Soares
- Serviço de Doenças Infeciosas, Centro Hospitalar Universitário de São João, Porto, Portugal
| | - Júlia Henriques
- Laboratório de Biologia Molecular (LMCBM, SPC, CHLO-HEM), Lisbon, Portugal
| | - Kamal Mansinho
- Serviço de Doenças Infeciosas, Hospital de Egas Moniz, Centro Hospitalar de Lisboa Ocidental, Lisbon, Portugal
| | - Liliana Pedro
- Serviço de Medicina, Hospital de Portimão, Centro Hospitalar Universitário do Algarve, Portimão, Portugal
| | | | | | - Maria José Manata
- Serviço de Doenças Infeciosas, Hospital de Curry Cabral, Centro Hospitalar Universitário de Lisboa Central, Lisbon, Portugal
| | - Margarida Mouro
- Serviço de Infeciologia, Hospital de Aveiro, Centro Hospitalar Baixo Vouga, Aveiro, Portugal
| | - Margarida Serrado
- Unidade de Imunodeficiência, Centro Hospitalar Universitário Lisboa Norte - HPV, Lisbon, Portugal
| | - Micaela Caixeiro
- Serviço de Infeciologia, Hospital Professor Doutor Fernando da Fonseca, Amadora, Portugal
| | - Nuno Marques
- Serviço de Infeciologia, Hospital Garcia da Orta, Almada, Portugal
| | - Olga Costa
- Serviço de Patologia Clínica, Biologia Molecular, Centro Hospitalar Universitário de Lisboa Central, Lisbon, Portugal
| | - Patrícia Pacheco
- Serviço de Infeciologia, Hospital Professor Doutor Fernando da Fonseca, Amadora, Portugal
| | - Paula Proença
- Serviço de Infeciologia, Hospital de Faro, Centro Hospitalar Universitário do Algarve, Faro, Portugal
| | - Paulo Rodrigues
- Serviço de Infeciologia, Hospital Beatriz Ângelo, Loures, Portugal
| | - Raquel Pinho
- Serviço de Medicina, Hospital de Portimão, Centro Hospitalar Universitário do Algarve, Portimão, Portugal
| | - Raquel Tavares
- Serviço de Infeciologia, Hospital Beatriz Ângelo, Loures, Portugal
| | - Ricardo Correia de Abreu
- Serviço de Infeciologia, Unidade de Local de Saúde de Matosinhos, Hospital Pedro Hispano, Matosinhos, Portugal
| | - Rita Côrte-Real
- Serviço de Patologia Clínica, Biologia Molecular, Centro Hospitalar Universitário de Lisboa Central, Lisbon, Portugal
| | - Rosário Serrão
- Serviço de Doenças Infeciosas, Centro Hospitalar Universitário de São João, Porto, Portugal
| | | | - Sofia Nunes
- Serviço de Infeciologia, Hospital de Aveiro, Centro Hospitalar Baixo Vouga, Aveiro, Portugal
| | - Telo Faria
- Unidade Local de Saúde do Baixo Alentejo, Hospital José Joaquim Fernandes, Beja, Portugal
| | - Teresa Baptista
- Serviço de Doenças Infeciosas, Hospital de Egas Moniz, Centro Hospitalar de Lisboa Ocidental, Lisbon, Portugal
| | - Maria Rosário O Martins
- Global Health and Tropical Medicine (GHTM), Instituto de Higiene e Medicina Tropical (IHMT), Universidade Nova de Lisboa (UNL), Lisbon, Portugal
| | - Perpétua Gomes
- Laboratório de Biologia Molecular (LMCBM, SPC, CHLO-HEM), Lisbon, Portugal.,Centro de Investigação Interdisciplinar Egas Moniz (CiiEM), Instituto Universitário Egas Moniz, Costa da Caparica, Portugal
| | - Luís Mendão
- Grupo de Ativistas em Tratamentos (GAT), Lisbon, Portugal
| | - Daniel Simões
- Grupo de Ativistas em Tratamentos (GAT), Lisbon, Portugal
| | - Ana Abecasis
- Global Health and Tropical Medicine (GHTM), Instituto de Higiene e Medicina Tropical (IHMT), Universidade Nova de Lisboa (UNL), Lisbon, Portugal
| |
Collapse
|
3
|
Pedro L, Rudewicz PJ. Analysis of Live Single Cells by Confocal Microscopy and High-Resolution Mass Spectrometry to Study Drug Uptake, Metabolism, and Drug-Induced Phospholipidosis. Anal Chem 2020; 92:16005-16015. [PMID: 33280372 DOI: 10.1021/acs.analchem.0c03534] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The analysis of large numbers of cells from a population results in information that does not reflect differences in cell phenotypes. Individual variations in cellular drug uptake, metabolism, and response to drug treatment may have profound effects on cellular survival and lead to the development of certain disease states, drug persistence, and resistance. Herein, we present a method that combines live cell confocal microscopy imaging with high-resolution mass spectrometry to achieve absolute cell quantification of the drug amiodarone (AMIO) and its major metabolite, N-desethylamiodarone (NDEA), in single liver cells (HepG2 and HepaRG cells). The method uses a prototype system that integrates a confocal microscope with an XYZ stage robot to image and automatically sample selected cells from a sample compartment, which is kept under growth conditions, with nanospray tips. Besides obtaining the distributions of AMIO and NDEA cell concentrations across a population of individual cells, as well as variabilities in drug metabolism, the effect of these on phospholipidosis and cell morphology was studied. The method was suited to identify subpopulations of cells that metabolized less drug and to correlate cell drug concentrations with cell phospholipid content, cell volume, sphericity, and other cell phenotypic features. Using principal component analysis (PCA), the treated cells could be clearly distinguished from vehicle control cells (0 μM AMIO) and HepaRG cells from HepG2 cells. The potential of using multidimensional and multimodal information collected from single cells to build predictive models for cell classification is demonstrated.
Collapse
Affiliation(s)
- Liliana Pedro
- Novartis Institutes for BioMedical Research, Emeryville, California 94608, United States
| | - Patrick J Rudewicz
- Novartis Institutes for BioMedical Research, Emeryville, California 94608, United States
| |
Collapse
|
4
|
Pedro L, Cross M, Hofmann A, Mak T, Quinn RJ. Development of an HPLC-based guanosine monophosphate kinase assay and application to Plasmodium vivax guanylate kinase. Anal Biochem 2019; 575:63-69. [PMID: 30943378 PMCID: PMC6494078 DOI: 10.1016/j.ab.2019.03.022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Revised: 03/18/2019] [Accepted: 03/29/2019] [Indexed: 11/12/2022]
Abstract
The development of a high-performance liquid chromatography (HPLC)-based method, for guanosine monophosphate kinase activity assays, is presented. The method uses the intrinsic UV absorption (at 260 nm) of substrates and products of the enzymatic reaction (GMP, ATP, ADP and GDP) to unambiguously determine percent conversion of substrate into product. It uses a commercially available C18 column which can separate reaction samples by elution under isocratic conditions in 12 min per run. The kinetics of the forward reaction catalyzed by Plasmodium vivax guanylate kinase (PvGK), a potential drug target against malaria, was determined. The relative concentrations of the two substrates (GMP and ATP) have a distinct effect on reaction velocity. Kinetic analyses showed the PvGK-catalyzed reaction to be associated with atypical kinetics, where substrate inhibition kinetics and non-Michaelis-Menten (sigmoidal) kinetics were found with respect to GMP and ATP, respectively. Additionally, the method was used in inhibition assays to screen twenty fragment-like compounds. The assays were robust and reproducible, with a signal window of 3.8 and a Z’ factor of 0.6. For the best inhibitor, an IC50 curve was generated. Simple HPLC separation of nucleotides involved in the guanylate kinase reaction. Direct and unambiguous determination of percent conversion of substrate into product. Successful application to Plasmodium vivax guanylate kinase (PvGK) activity studies. Reaction catalyzed by PvGK found to be associated with atypical kinetics. Robust and reproducible inhibition assay for compound screening.
Collapse
Affiliation(s)
- Liliana Pedro
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, Queensland, Australia
| | - Megan Cross
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, Queensland, Australia
| | - Andreas Hofmann
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, Queensland, Australia
| | - Tin Mak
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, Queensland, Australia
| | - Ronald J Quinn
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, Queensland, Australia.
| |
Collapse
|
5
|
Pedro L, Branquinho M, Canavarro MC, Fonseca A. Self-criticism, negative automatic thoughts and postpartum depressive symptoms: the buffering effect of self-compassion. J Reprod Infant Psychol 2019; 37:539-553. [DOI: 10.1080/02646838.2019.1597969] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Liliana Pedro
- Faculty of Psychology and Educational Sciences, University of Coimbra, Coimbra, Portugal
| | - Mariana Branquinho
- Faculty of Psychology and Educational Sciences, University of Coimbra, Coimbra, Portugal
| | - Maria Cristina Canavarro
- Research Group “Relationships, Development & Health”, Center for Research in Neuropsychology and Cognitive-Behavioural Intervention, Faculty of Psychology and Educational Sciences, University of Coimbra, Coimbra, Portugal
| | - Ana Fonseca
- Research Group “Relationships, Development & Health”, Center for Research in Neuropsychology and Cognitive-Behavioural Intervention, Faculty of Psychology and Educational Sciences, University of Coimbra, Coimbra, Portugal
| |
Collapse
|
6
|
Pomerantz AK, Sari-Sarraf F, Grove KJ, Pedro L, Rudewicz PJ, Fathman JW, Krucker T. Enabling drug discovery and development through single-cell imaging. Expert Opin Drug Discov 2018; 14:115-125. [DOI: 10.1080/17460441.2019.1559147] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Andrea K. Pomerantz
- Analytical Sciences & Imaging, Novartis Institutes for BioMedical Research Inc., Cambridge, MA, USA
| | - Farid Sari-Sarraf
- Analytical Sciences & Imaging, Novartis Institutes for BioMedical Research Inc., Cambridge, MA, USA
| | - Kerri J. Grove
- Global Discovery Chemistry, Novartis Institutes for BioMedical Research Inc., Emeryville, CA, USA
| | - Liliana Pedro
- Global Discovery Chemistry, Novartis Institutes for BioMedical Research Inc., Emeryville, CA, USA
| | - Patrick J. Rudewicz
- Global Discovery Chemistry, Novartis Institutes for BioMedical Research Inc., Emeryville, CA, USA
| | - John W. Fathman
- Cancer Therapeutics, Genomics Institute of the Novartis Research Foundation, La Jolla, CA, USA
| | - Thomas Krucker
- Alliance Management and Partnering, Novartis Institutes for BioMedical Research Inc., Emeryville, CA, USA
| |
Collapse
|
7
|
Vu H, Pedro L, Mak T, McCormick B, Rowley J, Liu M, Di Capua A, Williams-Noonan B, Pham NB, Pouwer R, Nguyen B, Andrews KT, Skinner-Adams T, Kim J, Hol WGJ, Hui R, Crowther GJ, Van Voorhis WC, Quinn RJ. Fragment-Based Screening of a Natural Product Library against 62 Potential Malaria Drug Targets Employing Native Mass Spectrometry. ACS Infect Dis 2018; 4:431-444. [PMID: 29436819 PMCID: PMC5902791 DOI: 10.1021/acsinfecdis.7b00197] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [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] [Indexed: 01/03/2023]
Abstract
![]()
Natural
products are well known for their biological relevance, high degree
of three-dimensionality, and access to areas of largely unexplored
chemical space. To shape our understanding of the interaction between
natural products and protein targets in the postgenomic era, we have
used native mass spectrometry to investigate 62 potential protein
targets for malaria using a natural-product-based fragment library.
We reveal here 96 low-molecular-weight natural products identified
as binding partners of 32 of the putative malarial targets. Seventy-nine
(79) fragments have direct growth inhibition on Plasmodium
falciparum at concentrations that are promising for the development
of fragment hits against these protein targets. This adds a fragment
library to the published HTS active libraries in the public domain.
Collapse
Affiliation(s)
- Hoan Vu
- Griffith Institute for Drug Discovery, Griffith University, 170 Kessels Road, Nathan, Queensland 4111, Australia
| | - Liliana Pedro
- Griffith Institute for Drug Discovery, Griffith University, 170 Kessels Road, Nathan, Queensland 4111, Australia
| | - Tin Mak
- Griffith Institute for Drug Discovery, Griffith University, 170 Kessels Road, Nathan, Queensland 4111, Australia
| | - Brendan McCormick
- Griffith Institute for Drug Discovery, Griffith University, 170 Kessels Road, Nathan, Queensland 4111, Australia
| | - Jessica Rowley
- Griffith Institute for Drug Discovery, Griffith University, 170 Kessels Road, Nathan, Queensland 4111, Australia
| | - Miaomiao Liu
- Griffith Institute for Drug Discovery, Griffith University, 170 Kessels Road, Nathan, Queensland 4111, Australia
| | - Angela Di Capua
- Griffith Institute for Drug Discovery, Griffith University, 170 Kessels Road, Nathan, Queensland 4111, Australia
| | - Billy Williams-Noonan
- Griffith Institute for Drug Discovery, Griffith University, 170 Kessels Road, Nathan, Queensland 4111, Australia
| | - Ngoc B. Pham
- Griffith Institute for Drug Discovery, Griffith University, 170 Kessels Road, Nathan, Queensland 4111, Australia
| | - Rebecca Pouwer
- Griffith Institute for Drug Discovery, Griffith University, 170 Kessels Road, Nathan, Queensland 4111, Australia
| | - Bao Nguyen
- Griffith Institute for Drug Discovery, Griffith University, 170 Kessels Road, Nathan, Queensland 4111, Australia
| | - Katherine T. Andrews
- Griffith Institute for Drug Discovery, Griffith University, 170 Kessels Road, Nathan, Queensland 4111, Australia
| | - Tina Skinner-Adams
- Griffith Institute for Drug Discovery, Griffith University, 170 Kessels Road, Nathan, Queensland 4111, Australia
| | | | | | - Raymond Hui
- Structural Genomics Consortium, University of Toronto, MaRS South Tower, seventh floor 101 College Street, Toronto, Ontario M5G 1L7, Canada
| | | | | | - Ronald J. Quinn
- Griffith Institute for Drug Discovery, Griffith University, 170 Kessels Road, Nathan, Queensland 4111, Australia
| |
Collapse
|
8
|
Harroun SG, Prévost-Tremblay C, Lauzon D, Desrosiers A, Wang X, Pedro L, Vallée-Bélisle A. Programmable DNA switches and their applications. Nanoscale 2018; 10:4607-4641. [PMID: 29465723 DOI: 10.1039/c7nr07348h] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
DNA switches are ideally suited for numerous nanotechnological applications, and increasing efforts are being directed toward their engineering. In this review, we discuss how to engineer these switches starting from the selection of a specific DNA-based recognition element, to its adaptation and optimisation into a switch, with applications ranging from sensing to drug delivery, smart materials, molecular transporters, logic gates and others. We provide many examples showcasing their high programmability and recent advances towards their real life applications. We conclude with a short perspective on this exciting emerging field.
Collapse
Affiliation(s)
- Scott G Harroun
- Laboratory of Biosensors & Nanomachines, Département de Chimie, Université de Montréal, Montréal, Québec H3C 3J7, Canada.
| | | | | | | | | | | | | |
Collapse
|
9
|
Vilhena E, Ribeiro JLP, Silva I, Pedro L, Meneses R, Cardoso H, da Silva AM, Mendonça D. Psychosocial Factors as Predictors of Adjustment to Life in Chronic Portuguese Patients. Eur J Public Health 2017. [DOI: 10.1093/eurpub/ckx189.241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- E Vilhena
- Polytechnic Institute of Cavado and Ave, Barcelos, EPIUnit, ISPUP University of Porto, Porto, Portugal
| | | | - I Silva
- University of Fernando Pessoa, Porto, Portugal
| | - L Pedro
- ESTeSL Polytechnic Institute of Lisbon, UIPES Portugal, Lisbon, Portugal
| | - R Meneses
- University of Fernando Pessoa, Porto, Portugal
| | - H Cardoso
- ICBAS University of Porto, HGSA/CHP Hospital Center of Porto, Porto, Portugal
| | - AM da Silva
- HGSA/CHP Hospital Center of Porto, 9UMIB/ICBAS University of Porto, Porto, Portugal
| | - D Mendonça
- ICBAS University of Porto, EPIUnit, ISPUP University of Porto, Porto, Portugal
| |
Collapse
|
10
|
Selvarajah V, Mäki-Petäjä KM, Pedro L, Bruggraber SF, Burling K, Goodhart AK, Brown MJ, McEniery CM, Wilkinson IB. Novel Mechanism for Buffering Dietary Salt in Humans: Effects of Salt Loading on Skin Sodium, Vascular Endothelial Growth Factor C, and Blood Pressure. Hypertension 2017; 70:930-937. [PMID: 28974570 PMCID: PMC5640984 DOI: 10.1161/hypertensionaha.117.10003] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [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: 07/17/2017] [Revised: 08/01/2017] [Accepted: 08/30/2017] [Indexed: 02/02/2023]
Abstract
High dietary sodium intake triggers increased blood pressure (BP). Animal studies show that dietary salt loading results in dermal Na+ accumulation and lymphangiogenesis mediated by VEGF-C (vascular endothelial growth factor C), both attenuating the rise in BP. Our objective was to determine whether these mechanisms function in humans. We assessed skin electrolytes, BP, and plasma VEGF-C in 48 healthy participants randomized to placebo (70 mmol sodium/d) and slow sodium (200 mmol/d) for 7 days. Skin Na+ and K+ concentrations were measured in mg/g of wet tissue and expressed as the ratio Na+:K+ to correct for variability in sample hydration. Skin Na+:K+ increased between placebo and slow sodium phases (2.91±0.08 versus 3.12±0.09; P=0.01). In post hoc analysis, there was a suggestion of a sex-specific effect, with a significant increase in skin Na+:K+ in men (2.59±0.09 versus 2.88±0.12; P=0.008) but not women (3.23±0.10 versus 3.36±0.12; P=0.31). Women showed a significant increase in 24-hour mean BP with salt loading (93±1 versus 91±1 mm Hg; P<0.001) while men did not (96±2 versus 96±2 mm Hg; P=0.91). Skin Na+:K+ correlated with BP, stroke volume, and peripheral vascular resistance in men but not in women. No change was noted in plasma VEGF-C. These findings suggest that the skin may buffer dietary Na+, reducing the hemodynamic consequences of increased salt, and this may be influenced by sex.
Collapse
Affiliation(s)
- Viknesh Selvarajah
- From the Division of Experimental Medicine and Immunotherapeutics, University of Cambridge, United Kingdom (V.S., K.M.M-P., A.K.G., C.M.M., I.B.W.); MRC Human Nutrition Unit, Cambridge, United Kingdom (L.P., S.F.A.B.); NIHR Cambridge Biomedical Research Centre, Core Biochemical Assay Laboratory, United Kingdom (K.B.); and William Harvey Research Institute, Queen Mary University of London, United Kingdom (M.J.B.).
| | | | | | | | | | | | | | | | | |
Collapse
|
11
|
Yang B, Feng YJ, Vu H, McCormick B, Rowley J, Pedro L, Crowther GJ, Van Voorhis WC, Forster PI, Quinn RJ. Bioaffinity Mass Spectrometry Screening. ACTA ACUST UNITED AC 2016; 21:194-200. [PMID: 26773071 DOI: 10.1177/1087057115622605] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (ESI-FTICR-MS or ESI-FTMS) was used to screen 192 natural product extracts and a 659-member natural product-based fragment library for bindings to a potential malaria drug target, Plasmodium falciparum Rab11a (PfRab11a, PF13_0119). One natural product extract and 11 fragments showed binding activity. A new natural product, arborside E, was identified from the active extract of Psydrax montigena as a weak binder. Its binding activity and inhibitory activity against PfRab11a were confirmed by ESI-FTMS titration experiments and an orthogonal enzyme assay.
Collapse
Affiliation(s)
- Ben Yang
- Eskitis Institute for Drug Discovery, Griffith University, Brisbane, Australia
| | - Yun Jiang Feng
- Eskitis Institute for Drug Discovery, Griffith University, Brisbane, Australia
| | - Hoan Vu
- Eskitis Institute for Drug Discovery, Griffith University, Brisbane, Australia
| | - Brendan McCormick
- Eskitis Institute for Drug Discovery, Griffith University, Brisbane, Australia
| | - Jessica Rowley
- Eskitis Institute for Drug Discovery, Griffith University, Brisbane, Australia
| | - Liliana Pedro
- Eskitis Institute for Drug Discovery, Griffith University, Brisbane, Australia
| | | | | | - Paul I Forster
- Queensland Herbarium, DSITI, Brisbane Botanic Gardens, Queensland, Australia
| | - Ronald J Quinn
- Eskitis Institute for Drug Discovery, Griffith University, Brisbane, Australia
| |
Collapse
|
12
|
Pedro L, Van Voorhis WC, Quinn RJ. Optimization of Electrospray Ionization by Statistical Design of Experiments and Response Surface Methodology: Protein-Ligand Equilibrium Dissociation Constant Determinations. J Am Soc Mass Spectrom 2016; 27:1520-30. [PMID: 27225419 PMCID: PMC4972871 DOI: 10.1007/s13361-016-1417-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2014] [Revised: 04/29/2016] [Accepted: 05/04/2016] [Indexed: 05/28/2023]
Abstract
Electrospray ionization mass spectrometry (ESI-MS) binding studies between proteins and ligands under native conditions require that instrumental ESI source conditions are optimized if relative solution-phase equilibrium concentrations between the protein-ligand complex and free protein are to be retained. Instrumental ESI source conditions that simultaneously maximize the relative ionization efficiency of the protein-ligand complex over free protein and minimize the protein-ligand complex dissociation during the ESI process and the transfer from atmospheric pressure to vacuum are generally specific for each protein-ligand system and should be established when an accurate equilibrium dissociation constant (KD) is to be determined via titration. In this paper, a straightforward and systematic approach for ESI source optimization is presented. The method uses statistical design of experiments (DOE) in conjunction with response surface methodology (RSM) and is demonstrated for the complexes between Plasmodium vivax guanylate kinase (PvGK) and two ligands: 5'-guanosine monophosphate (GMP) and 5'-guanosine diphosphate (GDP). It was verified that even though the ligands are structurally similar, the most appropriate ESI conditions for KD determination by titration are different for each. Graphical Abstract ᅟ.
Collapse
Affiliation(s)
- Liliana Pedro
- Eskitis Institute for Drug Discovery, Griffith University, Brisbane, Queensland, Australia
| | | | - Ronald J Quinn
- Eskitis Institute for Drug Discovery, Griffith University, Brisbane, Queensland, Australia.
| |
Collapse
|
13
|
Selvarajah V, Maki-Petaja K, Pedro L, Bruggraber SF, Brown MJ, McEniery CM, Wilkinson IB. Abstract 098: A Novel Mechanism for Buffering Dietary Salt in Humans: Effects of Salt Loading on Skin Sodium, VEGF-C and Blood Pressure. Hypertension 2016. [DOI: 10.1161/hyp.68.suppl_1.098] [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] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Introduction:
Dietary sodium is an important trigger for hypertension. Animal studies show that the skin buffers dietary salt and salt-loading induces lymphangiogenesis mediated by VEGF-C, maintaining normal BP. Our primary objective was to determine whether increased skin Na
+
on salt loading attenuates the expected rise in blood pressure.
Methods:
We assessed skin and urine electrolytes, systemic haemodynamics, ambulatory BP and plasma VEGF-C in 48 healthy participants. Participants were placed on a low salt diet (70mmol sodium/day) and received placebo and slow sodium (200mmol daily for 7 days) in a randomised order. Skin Na
+
and K
+
concentrations were measured in mg/g tissue by inductively coupled plasma optical emission spectroscopy. Results were expressed as the ratio of Na
+
:K
+
to correct for variability in sample hydration. Plasma VEGF-C was analysed by ELISA.
Results:
Mean age was 30 ± 8 years (24 male). 24-hr urine Na
+
was higher following salt than placebo in males (221.9 ± 16.5 vs. 86.3 ± 10.3mmol, p < 0.001) and females (227.1 ± 19.9 vs. 60.0 ± 6.8mmol, p < 0.001). In males, skin Na
+
:K
+
was higher after salt loading (2.87 ± 0.12 vs. 2.59 ± 0.09 mg/g , p = 0.008), but not significantly different in females (3.36 ± 0.12 vs. 3.23 ± 0.10 mg/g, p = 0.49). Females showed a significant increase in 24-hr MAP with salt loading (88 ± 1 vs. 85 ± 1 mmHg, p=0.004) but not males (90 ± 2 vs. 90 ± 2 mm Hg, p = 0.91). In males only, skin Na
+
:K
+
correlated with supine MAP post-placebo (r = 0.52, p = 0.004) and post-salt (r = 0.51, p = 0.01). No significant change was noted in plasma VEGF-C.
Conclusions:
Salt loading causes an increase in BP in healthy females but not in males, whilst skin sodium rises in males. This indicates that the skin may buffer the haemodynamic consequences of increased salt intake in a gender-specific manner.
Collapse
Affiliation(s)
- Viknesh Selvarajah
- Experimental Medicine & Therapeutics, Univ of Cambridge, Cambridge, United Kingdom
| | - Kaisa Maki-Petaja
- Experimental Medicine & Therapeutics, Univ of Cambridge, Cambridge, United Kingdom
| | - Liliana Pedro
- MRC Human Nutrition Rsch Unit, Cambridge, United Kingdom
| | | | - Morris J Brown
- William Harvey Rsch Institute, Queen Mary, Univ of London, London, United Kingdom
| | - Carmel M McEniery
- Experimental Medicine & Therapeutics, Univ of Cambridge, Cambridge, United Kingdom
| | - Ian B Wilkinson
- Experimental Medicine & Therapeutics, Univ of Cambridge, Cambridge, United Kingdom
| |
Collapse
|
14
|
Sydnes MO, Van Le P, Olschimke J, Healy PC, Garavelas A, Tajabadi FM, Pedro L, Quinn RJ, Jenkins ID. Synthesis of two chiral octahydroindole scaffolds for drug discovery. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.01.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
15
|
Petit JM, Pedro L, Guiu B, Duvillard L, Bouillet B, Jooste V, Habchi M, Crevisy E, Fourmont C, Buffier P, Hillon P, Cercueil JP, Verges B. Type 1 diabetes is not associated with an increased prevalence of hepatic steatosis. Diabet Med 2015; 32:1648-51. [PMID: 25981893 DOI: 10.1111/dme.12805] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/13/2015] [Indexed: 02/06/2023]
Abstract
AIM Non-alcoholic fatty liver disease (NAFLD) is commonly associated with Type 2 diabetes. Recently, it has been suggested that NAFLD is also frequently associated with Type 1 diabetes and diabetic complications. In this study, we set out to determine whether Type 1 diabetes was associated with liver fat content measured using magnetic resonance imaging. METHODS One hundred and twenty-eight patients with Type 1 diabetes, 264 patients with Type 2 diabetes and 67 participants without diabetes were included in this study. Hepatic steatosis was defined as a liver fat content > 5.5%. RESULTS People with Type 1 diabetes and controls were similar for age and BMI. Liver fat content was significantly higher in patients with Type 2 diabetes than in patients with Type 1 diabetes and controls. In the control group, nine people (13.4%) had steatosis compared with six (4.7%) patients with Type 1 diabetes (P = 0.04). Among patients with Type 2 diabetes group, 166 (62.8%) had steatosis. In multivariate analysis that included patients with Type 1 diabetes and participants without diabetes, steatosis was associated only with BMI, whereas age, sex, statin therapy and Type 1 diabetes were not. In patients with Type 1 diabetes, there was no correlation between liver fat content and estimated glomerular filtration rate or carotid intima media thickness. CONCLUSIONS Our data showed that Type 1 diabetes was not associated with an increased prevalence of steatosis. Moreover, our study provided no specific arguments concerning a link between liver fat content and diabetic complications in patients with Type 1 diabetes.
Collapse
Affiliation(s)
- J-M Petit
- Centre de Recherche INSERM Unité 866
- Services de diabétologie et endocrinologie
| | - L Pedro
- Services de diabétologie et endocrinologie
| | - B Guiu
- Centre de Recherche INSERM Unité 866
- Services de radiologie, Université de Bourgogne, Dijon, France
| | | | - B Bouillet
- Centre de Recherche INSERM Unité 866
- Services de diabétologie et endocrinologie
| | - V Jooste
- Centre de Recherche INSERM Unité 866
| | - M Habchi
- Services de diabétologie et endocrinologie
| | - E Crevisy
- Services de diabétologie et endocrinologie
| | - C Fourmont
- Services de diabétologie et endocrinologie
| | - P Buffier
- Services de diabétologie et endocrinologie
| | - P Hillon
- Centre de Recherche INSERM Unité 866
| | - J-P Cercueil
- Centre de Recherche INSERM Unité 866
- Services de radiologie, Université de Bourgogne, Dijon, France
| | - B Verges
- Centre de Recherche INSERM Unité 866
- Services de diabétologie et endocrinologie
| |
Collapse
|
16
|
Gervásio P, Pedro L. Evidence based for exercise program in physical therapy in patients with multiple sclerosis. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.3235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
17
|
Pedro L, Ribeiro JP, Pinheiro JP. Importance of intervention program for the promotion of physical activity in the perception of illness in people with multiple. J Neurol Sci 2013. [DOI: 10.1016/j.jns.2013.07.1954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
18
|
Luo X, Pedro L, Milic V, Mulhovo S, Duarte A, Duarte N, Ferreira MJU. Antibacterial benzofuran neolignans and benzophenanthridine alkaloids from the roots of Zanthoxylum capense. Planta Med 2012; 78:148-153. [PMID: 22002848 DOI: 10.1055/s-0031-1280289] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Two new 2-arylbenzofuran neolignans and a new benzophenanthridine alkaloid, together with six known benzophenanthridine alkaloids, namely, decarine, norchelerythrine, dihydrochelerythrine, 6-acetonyldihydrochelerythrine, tridecanonchelerythrine, and 6-acetonyldihydronitidine, have been isolated from the MeOH extract of the roots of Zanthoxylum capense. Their structures were elucidated by means of spectroscopic techniques including 2D NMR experiments. All the isolated compounds were evaluated for their in vitro antibacterial activity against gram-positive and gram-negative bacteria. Some compounds showed significant inhibitory activity against Staphylococcus aureus ATCC 6538 with MIC values ranging from 12.5 to 50 μg/mL.
Collapse
Affiliation(s)
- Xuan Luo
- Research Institute for Medicines and Pharmaceutical Sciences (iMed.UL), Faculty of Pharmacy, University of Lisbon, Lisbon, Portugal
| | | | | | | | | | | | | |
Collapse
|
19
|
Neves M, Miguel M, Pedro L, Barroso J, Figueiredo A, Martins D, Dandlen S. Variability of olive oil cultivar on stability during storage. Acta Alimentaria 2011. [DOI: 10.1556/aalim.40.2011.4.3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
20
|
Gauthier N, Caron M, Pedro L, Arcand M, Blouin J, Labonté A, Normand C, Paquet V, Rodenbrock A, Roy M, Rouleau N, Beaudet L, Padrós J, Rodriguez-Suarez R. Development of homogeneous nonradioactive methyltransferase and demethylase assays targeting histone H3 lysine 4. ACTA ACUST UNITED AC 2011; 17:49-58. [PMID: 21940714 DOI: 10.1177/1087057111416659] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Histone posttranslational modifications are among the epigenetic mechanisms that modulate chromatin structure and gene transcription. Histone methylation and demethylation are dynamic processes controlled respectively by histone methyltransferases (HMTs) and demethylases (HDMs). Several HMTs and HDMs have been implicated in cancer, inflammation, and diabetes, making them attractive targets for drug therapy. Hence, the discovery of small-molecule modulators for these two enzyme classes has drawn significant attention from the pharmaceutical industry. Herein, the authors describe the development and optimization of homogeneous LANCE Ultra and AlphaLISA antibody-based assays for measuring the catalytic activity of two epigenetic enzymes acting on lysine 4 of histone H3: SET7/9 methyltransferase and LSD1 demethylase. Both the SET7/9 and LSD1 assays were designed as signal-increase assays using biotinylated peptides derived from the N-terminus of histone H3. In addition, the SET7/9 assay was demonstrated using full-length histone H3 protein as substrate in the AlphaLISA format. Optimized assays in 384-well plates are robust (Z' factors ≥0.7) and sensitive, requiring only nanomolar concentrations of enzyme and substrate. All assays allowed profiling of known SET7/9 and LSD1 inhibitors. The results demonstrate that the optimized LANCE Ultra and AlphaLISA assay formats provide a relevant biochemical screening approach toward the identification of small-molecule inhibitors of HMTs and HDMs that could lead to novel epigenetic therapies.
Collapse
Affiliation(s)
- Nancy Gauthier
- PerkinElmer,1744 William Street, Suite 600, Montreal, Quebec, Canada, H3J 1R4
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Bounatirou S, Smiti S, Miguel M, Faleiro L, Rejeb M, Neffati M, Costa M, Figueiredo A, Barroso J, Pedro L. Thermal stability of the essential oils isolated from TunisianThymus capitatusHoff. et Link.: Effect on the chemical composition and the antioxidant and antibacterial activities. Acta Alimentaria 2010. [DOI: 10.1556/aalim.39.2010.3.6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
22
|
Pedro L, Padrós J, Beaudet L, Schubert HD, Gillardon F, Dahan S. Development of a high-throughput AlphaScreen assay measuring full-length LRRK2(G2019S) kinase activity using moesin protein substrate. Anal Biochem 2010; 404:45-51. [PMID: 20434426 DOI: 10.1016/j.ab.2010.04.028] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2010] [Revised: 04/23/2010] [Accepted: 04/24/2010] [Indexed: 01/09/2023]
Abstract
Mutations within the LRRK2 (leucine-rich repeat kinase 2) gene predispose humans to develop late-onset Parkinson's disease (PD). The most prevalent of these mutations, G2019S, has been shown to increase LRRK2 kinase activity. Therefore, the discovery of small molecule inhibitors of LRRK2(G2019S) through high-throughput screening (HTS) may provide a novel therapeutic strategy for treating PD. Current biochemical assays monitoring the activity of LRRK2(G2019S) either are radioactive or use short peptidic substrates. Here we describe the development and optimization of a novel HTS AlphaScreen assay for measuring the catalytic activity of full-length LRRK2(G2019S) using its putative physiological protein substrate moesin. The high sensitivity of this optimized 384-well assay allowed the use of enzyme concentrations as low as 0.75nM. The estimated apparent K(m) value for adenosine triphosphate (6 microM) using the glutathione S-transferase-moesin substrate was much lower than the one previously reported using LRRKtide, a synthetic peptide derived from moesin. Testing of nonselective kinase inhibitors (staurosporine, H-1152, and Y-27632) generated potencies consistent with published data. Finally, robotic validation of the assay yielded an average Z' factor of 0.80. Overall, these results indicate that the present HTS AlphaScreen assay might provide a more relevant biochemical approach for the discovery of novel LRRK2(G2019S) inhibitors.
Collapse
|
23
|
Figueiredo A, Barroso J, Pedro L, Salgueiro L, Miguel M, Faleiro M. Portuguese Thymbra and Thymus Species Volatiles: Chemical Composition and Biological Activities. Curr Pharm Des 2008; 14:3120-40. [DOI: 10.2174/138161208786404218] [Citation(s) in RCA: 102] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
24
|
Abstract
The recent demand for nanoparticulate products such as viruses, plasmids, protein nanoparticles, and drug delivery systems have resulted in the requirement for predictable and controllable production processes. Protein nanoparticles are an attractive candidate for gene and molecular therapy due to their relatively easy production and manipulation. These particles combine the advantages of both viral and non‐viral vectors while minimizing the disadvantages. However, their successful application depends on the availability of selective and scalable methodologies for product recovery and purification. Downstream processing of nanoparticles depends on the production process, producer system, culture media and on the structural nature of the assembled nanoparticle, i.e., mainly size, shape and architecture. In this paper, the most common processes currently used for the purification of nanoparticles, are reviewed.
Collapse
Affiliation(s)
- L Pedro
- IBB-Institute for Biotechnology and Bioengineering, Centre for Molecular and Structural Biomedicine, University of Algarve, Faro, Portugal
| | - S S Soares
- IBB-Institute for Biotechnology and Bioengineering, Centre for Molecular and Structural Biomedicine, University of Algarve, Faro, Portugal
| | - G N M Ferreira
- IBB-Institute for Biotechnology and Bioengineering, Centre for Molecular and Structural Biomedicine, University of Algarve, Faro, Portugal
| |
Collapse
|
25
|
Miguel MG, Figueiredo AC, Costa MM, Martins D, Barroso JG, Pedro L. Effect of the essential volatile oils isolated from Thymbra capitata (L.) Cav. on olive and sunflower oils. Grasas y Aceites 2007. [DOI: 10.3989/gya.2003.v54.i3.234] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
26
|
Abstract
Kinases represents one of the most important family of targets in high throughput drug screening. Tyrosine kinases and serine/threonine kinases are known to play key roles in signal transduction as well as in cell growth and differentiation. Intense screening campaigns are underway in all major pharmaceuticals and large biotech companies to find kinase inhibitors for the treatment of inflammatory diseases, immunological disorders and cancer. The present contribution describes models that were developed to produce kinase assays amenable to HTS using AlphaScreen. Because of the flexibility allowed by AlphaScreen, kinase assays can be developed using direct or indirect approaches. Tyrosine kinase assays are usually performed with a direct format involving generic anti-phosphotyrosine antibodies while serine/threonine kinase assays are performed with an indirect format where specific antibodies are captured using protein A conjugated Acceptor beads. Streptavidin-coated Donor beads are used to capture either generic (ex. poly GT) or specific biotinylated substrates. Herein, are presented different methods to perform screening for inhibitors acting on the soluble beta-insulin receptor tyrosine kinase (IRKD), and on p38, a member of the MAP kinase family.
Collapse
Affiliation(s)
- Greg Warner
- PerkinElmer Life and Analytical Sciences, 549 Albany Street, Boston, MA 02118, USA.
| | | | | | | | | |
Collapse
|
27
|
Barata F, Figueiredo A, Alves P, Pedro L, Rato R. Brain metastases from NSCLC. Lung Cancer 2000. [DOI: 10.1016/s0169-5002(00)80575-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
28
|
Abstract
The natriuretic peptide receptor-A (NPR-A) is involved in blood pressure and body fluid regulation in order to help maintain cardiovascular homeostasis. It has been shown that these biological effects are mediated through the natriuretic peptide family of hormones, which bind NPR-A according to the rank order ANP>BNP>>CNP. Previous studies performed with rat kidney papillary tissue suggested the existence of an heterologous NPR-A population since two binding components were obtained for pBNP32, one of high affinity (pK 9.4 +/- 0.1) and the other of lower affinity (pK 7.5 +/- 0.1), while in the same preparation rANP28 binding displayed the expected affinity (pK 10.22 +/- 0.01) and was best fitted with a model involving a single class of binding sites. This apparent heterogeneity of NPR-A in rat kidney papillae could be explained by the presence of two receptor isoforms or of monomeric and oligomeric forms of the same receptor. To investigate the NPR-A binding heterogeneity, we have cloned the rat NPR-A from PC12 cells and compared its pharmacological profile with that of the papillae. Our results with rat NPR-A transfected Cos-P cells show an equivalent pharmacological profile as with the rat tissue, i.e. a high affinity for rANP28 (pK 10.4 +/- 0.1) and two distinctive affinities for pBNP32 (pK 9.74 +/- 0.05 and 7.8 +/- 0.1). Although multiple receptor glycoforms were sometimes detectable by western blotting, only one molecular form was obtained by cross-linking with 125I-rANP28. It thus appears that NPR-A alone can account for the two binding components found in the rat papillae and that a single molecular form of the protein is implicated. We therefore propose that the oligomerization state of the receptors could be responsible for the apparent binding heterogeneity of rat NPR-A.
Collapse
Affiliation(s)
- M Marquis
- Département de Biochimic, Université de Montréal, Québec, Canada
| | | | | | | | | |
Collapse
|
29
|
Abstract
Many internalized receptors are known to be phosphorylated within their cytoplasmic domain. Natriuretic peptide receptor-C (NPR-C) is a covalent homodimer primarily involved in the internalization of bound ligand resulting in tissue uptake and degradation of natriuretic peptides. In this report, we have investigated the phosphorylation state of NPR-C receptors present at high level in rat aortic smooth muscle cells (RASM). 32P labeled cells, NPR-C purification and phosphoamino acid analysis clearly demonstrate that NPR-C exists as a phosphoprotein in RASM cells and that phosphorylation occurs exclusively on serine residues. Transient expression of bovine NPR-C in Cos-P cells of kidney origin confirmed that phosphorylation occurs within the cytoplasmic domain of the receptor. These results provide the first evidence for NPR-C phosphorylation as well as a model for future studies of its role in altering receptor function.
Collapse
Affiliation(s)
- L Pedro
- Département de Pharmacologie, Université de Montréal, Québec, Canada
| | | | | | | | | |
Collapse
|
30
|
Gervásio H, Albano J, Gordilho J, Oliveira C, Pedro L, Pereira M, Abraul E, dos Santos G, Amaral N, Marques C, Raimundo D, Azevedo C, Bianchi F, Ribeiro A, Brandao J. Neo-adjuvant chemotherapy: A combination containing mitoxantrone for the treatment of locally advanced breast cancer. Randomized trial comparing an initial chemotherapy versus a chemotherapy/radiotherapy combination. Eur J Cancer 1993. [DOI: 10.1016/0959-8049(93)90986-p] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|