LUCAS AUGUSTO MOYSES FRANCO
Projetos de Pesquisa
Unidades Organizacionais
LIM/46 - Laboratório de Parasitologia Médica, Hospital das Clínicas, Faculdade de Medicina
20 resultados
Resultados de Busca
Agora exibindo 1 - 10 de 20
- Synbiotic Supplementation Modulates Gut Microbiota, Regulates beta-Catenin Expression and Prevents Weight Gain in ob/ob Mice: Preliminary Findings(2022) DUARTE, Sebastiao Mauro B.; STEFANO, Jose Tadeu; FRANCO, Lucas A. M.; MARTINS, Roberta C.; MORAES, Bruna D. G. C.; BARBEIRO, Denise Frediani; OLIVEIRA, Nathalia; NERI, Junia Marielle Teixeira Rodrigues; COGLIATI, Bruno; VANNI, Denise Siqueira; SABINO, Ester C.; CARRILHO, Flair J.; OLIVEIRA, Claudia P.Background: Obesity is one of the main health problems in the world today, and dysbiosis seems to be one of the factors involved. The aim of this study was to examine the impact of synbiotic supplementation on obesity and the microbiota in ob/ob mice. Twenty animals were divided into four groups: obese treated (OT), obese control (OC), lean treated (LT) and lean control (LC). All animals received a standard diet for 8 weeks. The treated groups received a synbiotic (Simbioflora-Invictus Farmanutricao Ltd., Sao Paulo, Brazil) in water, while the nontreated groups received only water. After 8 weeks, all animals were sacrificed, and gut tissue and stool samples were collected for mRNA isolation and microbiota analysis, respectively. beta-Catenin, occludin, cadherin and zonulin in the gut tissue were analyzed via RT-qPCR. Microbiome DNA was extracted from stool samples and sequenced using an Ion PGM Torrent platform. Results: Synbiotic supplementation reduced body weight gain in the OT group compared with the OC group (p = 0.0398) and was associated with an increase in Enterobacteriaceae (p = 0.005) and a decrease in Cyanobacteria (p = 0.047), Clostridiaceae (p = 0.026), Turicibacterales (p = 0.005) and Coprococcus (p = 0.047). On the other hand, a significant reduction in Sutterella (p = 0.009) and Turicibacter (p = 0.005) bacteria was observed in the LT group compared to the LC group. Alpha and beta diversities were different among all treated groups. beta-Catenin gene expression was significantly decreased in the gut tissue of the OT group (p <= 0.0001) compared to the other groups. No changes were observed in occludin, cadherin or zonulin gene expression in the gut tissue. Conclusions: Synbiotic supplementation prevents excessive weight gain, modulates the gut microbiota, and reduces beta-catenin expression in ob/ob mice.
- Identification of Leishmania species by next generation sequencing of hsp70 gene(2022) SOUZA, Regina Maia de; MARTINS, Roberta Cristina Ruedas; FRANCO, Lucas Augusto Moyses; TUON, Felipe Francisco; OLIVEIRA JUNIOR, Isael Gomes de; SILVA, Camila Alves Maia da; IMAMURA, Rui; AMATO, Valdir SabbagaLeishmaniasis is a major public health problem worldwide. Although next generation sequencing technology has been widely used in the diagnosis of infectious diseases, it has been scarcely applied in identification of Leishmania species. The aim of this study was to compare the efficiency of MinIONTM nanopore sequencing and polymerase chain reaction restriction fragment length polymorphism in identifying Leishmania species. Our results showed that the MinIONTM sequencer was able to discriminate reference strains and clinical samples with high sensitivity in a cost and time effective manner without the prior need for culture.
- COL1A1, COL4A3, TIMP2 and TGFB1 polymorphisms in cervical insufficiency(2021) ALVES, Ana Paula V. D.; FREITAS, Amanda B.; LEVI, Jose Eduardo; AMORIM FILHO, Antonio G.; FRANCO, Lucas A. M.; HOSHIDA, Mara Sandra; PATINO, Elizabeth G.; V, Rossana P. Francisco; CARVALHO, Mario Henrique B.Objectives: To investigate the association between selected single nucleotide polymorphisms (SNPs) with cervical insufficiency and its relationship with obstetric history. Methods: Twenty-eight women with cervical insufficiency (case group) and 29 non-pregnant women (control group) were included. The SNPs sequenced included rs2586490 in collagen type I alpha 1 chain (COL1A1), rs1882435 in collagen type IV alpha 3 chain (COL4A3), rs2277698 in metallopeptidase inhibitor 2 (TIMP2), and rs1800468 in transforming growth factor beta 1 (TGFB1). Results: We found a higher frequency of the normal allele in the control group (65.5%) and the homozygous mutated genotype in the case group (64.3%) for rs2586490 in COL1A1 (p=0.023). An unplanned finding in the cervical insufficiency group was a higher gestational age of delivery (median >= 38 weeks) in the mutated allele than in the wildtype genotype (median of 28.2 weeks) for rs2857396, which is also in the COL1A1 gene (p=0.011). Conclusions: The findings of the present study corroborate the hypothesis that cervical insufficiency has a genetic component and probably involves genes encoding proteins in the extracellular matrix, in addition to inflammatory processes.
conferenceObject The symbiotic supplementation modulate gut microbiota, regulation beta-catenin expression and prevents weight gain in ob/ob mice with non-alcoholic fatty liver disease (NAFLD)(2020) DUARTE, Sebastiao Mauro Bezerra; STEFANO, Jose Tadeu; FRANCO, Lucas A. M.; MARTINS, Roberta Cristina Ruedas; BARBEIRO, Denise Frediani; NERI, Junia Marielle Teixeira Rodrigues; COGLIATI, Bruno; SABINO, Ester Cerdeira; CARRILHO, Flair Jose; OLIVEIRA, Claudia- Genome-wide association study for Chagas Cardiomyopathy identify a new risk locus on chromosome 18 associated with an immune-related protein and transcriptional signature(2022) SABINO, Ester Cerdeira; FRANCO, Lucas Augusto Moyses; VENTURINI, Gabriela; RODRIGUES, Mariliza Velho; MARQUES, Emanuelle; SILVA, Lea Campos de Oliveira-da; MARTINS, Larissa Natany Almeida; FERREIRA, Ariela Mota; ALMEIDA, Paulo Emilio Clementino; SILVA, Felipe Dias Da; LEITE, Samara Fernandes; NUNES, Maria do Carmo Pereira; HAIKAL, Desiree Sant'Ana; OLIVEIRA, Claudia Di Lorenzo; CARDOSO, Clareci Silva; SEIDMAN, Jonathan G.; SEIDMAN, Christine E.; CASAS, Juan P.; RIBEIRO, Antonio Luiz Pinho; KRIEGER, Jose E.; PEREIRA, Alexandre C.Background Chronic Chagas Cardiomyopathy (CCC) usually develops between 10 and 20 years after the first parasitic infection and is one of the leading causes of end-stage heart failure in Latin America. Despite the great inter-individual variability in CCC susceptibility (only 30% of infected individuals ever present CCC), there are no known predictors for disease development in those chronically infected. Methodology/Principal findings We describe a new susceptibility locus for CCC through a GWAS analysis in the SaMi-Trop cohort, a population-based study conducted in a Chagas endemic region from Brazil. This locus was also associated with CCC in the REDS II Study. The newly identified locus (rs34238187, OR 0.73, p-value 2.03 x 10(-9)) spans a haplotype of approximately 30Kb on chromosome 18 (chr18: 5028302-5057621) and is also associated with 80 different traits, most of them blood protein traits significantly enriched for immune-related biological pathways. Hi-C data show that the newly associated locus is able to interact with chromatin sites as far as 10Mb on chromosome 18 in a number of different cell types and tissues. Finally, we were able to confirm, at the tissue transcriptional level, the immune-associated blood protein signature using a multi-tissue differential gene expression and enrichment analysis. Conclusions/Significance We suggest that the newly identified locus impacts CCC risk among T cruzi infected individuals through the modulation of a downstream transcriptional and protein signature associated with host-parasite immune response. Functional characterization of the novel risk locus is warranted.
- Genomics and epidemiology of the P.1 SARS-CoV-2 lineage in Manaus, Brazil(2021) FARIA, Nuno R.; MELLAN, Thomas A.; WHITTAKER, Charles; CLARO, Ingra M.; CANDIDO, Darlan da S.; MISHRA, Swapnil; CRISPIM, Myuki A. E.; SALES, Flavia C.; HAWRYLUK, Iwona; MCCRONE, John T.; HULSWIT, Ruben J. G.; FRANCO, Lucas A. M.; RAMUNDO, Mariana S.; JESUS, Jaqueline G. de; ANDRADE, Pamela S.; COLETTI, Thais M.; FERREIRA, Giulia M.; SILVA, Camila A. M.; MANULI, Erika R.; PEREIRA, Rafael H. M.; PEIXOTO, Pedro S.; KRAEMER, Moritz U.; GABURO JR., Nelson; CAMILO, Cecilia da C.; HOELTGEBAUM, Henrique; SOUZA, William M.; ROCHA, Esmenia C.; SOUZA, Leandro M. de; PINHO, Mariana C. de; ARAUJO, Leonardo J. T.; V, Frederico S. Malta; LIMA, Aline B. de; SILVA, Joice do P.; ZAULI, Danielle A. G.; FERREIRA, Alessandro C. de S.; SCHNEKENBERG, Ricardo P.; LAYDON, Daniel J.; WALKER, Patrick G. T.; SCHLUETER, Hannah M.; SANTOS, Ana L. P. dos; VIDAL, Maria S.; CARO, Valentina S. Del; FILHO, Rosinaldo M. F.; SANTOS, Helem M. dos; AGUIAR, Renato S.; PROENCA-MODENA, Jose L. P.; NELSON, Bruce; HAY, James A.; MONOD, Melodie; MISCOURIDOU, Xenia; COUPLAND, Helen; SONABEND, Raphael; VOLLMER, Michaela; GANDY, Axel; PRETE JR., Carlos A.; NASCIMENTO, Vitor H.; SUCHARD, Marc A.; BOWDEN, Thomas A.; POND, Sergei L. K.; WU, Chieh-Hsi; RATMANN, Oliver; FERGUSON, Neil M.; DYE, Christopher; LOMAN, Nick J.; LEMEY, Philippe; RAMBAUT, Andrew; FRAIJI, Nelson A.; CARVALHO, Maria do P. S. S.; PYBUS, Oliver G.; FLAXMAN, Seth; BHATT, Samir; SABINO, Ester C.Cases of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection in Manaus, Brazil, resurged in late 2020 despite previously high levels of infection. Genome sequencing of viruses sampled in Manaus between November 2020 and January 2021 revealed the emergence and circulation of a novel SARS-CoV-2 variant of concern. Lineage P.1 acquired 17 mutations, including a trio in the spike protein (K417T, E484K, and N501Y) associated with increased binding to the human ACE2 (angiotensin-converting enzyme 2) receptor. Molecular clock analysis shows that P.1 emergence occurred around mid-November 2020 and was preceded by a period of faster molecular evolution. Using a two-category dynamical model that integrates genomic and mortality data, we estimate that P.1 may be 1.7- to 2.4-fold more transmissible and that previous (non-P.1) infection provides 54 to 79% of the protection against infection with P.1 that it provides against non-P.1 lineages. Enhanced global genomic surveillance of variants of concern, which may exhibit increased transmissibility and/or immune evasion, is critical to accelerate pandemic responsiveness.
- Impact of COVID-19 RT-PCR testing of asymptomatic health care workers on absenteeism and hospital transmission during the pandemic(2023) MENDES, Elisa Teixeira; NETO, Danilo Glauco Pereira Villagelin; FERREIRA, Giulia Magalhaes; VALENCA, Ian Nunes; LIMA, Maria Patelli Juliani Souza; FREITAS, Maria Fernanda Marciano Barros de; DONALISIO, Maria Rita; MELO, Marcio Cristiano; LAZARI, Carolina; GOES, Jacqueline; MORALES, Ingra; JARDIM, Ana Carolina Gomes; SANTOS, Pamela Andrade dos; FRANCO, Lucas Augusto Moyses; SABINO, Ester Cerdeiro; COSTA, Silvia FigueiredoBackground: Reducing the transmission of SARS-CoV-2 from asymptomatic and pre-symptomatic patients is critical in controlling the circulation of the virus.Methods: This study evaluated the prevalence of Reverse transcription polymerase chain reaction (RT-PCR) positivity in serial tests in 429 asymptomatic health care workers (HCW) and its impact on absenteeism. HCW from a COVID-19 reference hospital were tested, screened, and placed on leave. A time-series seg-mented regression of weekly absenteeism rates was used, and cases of infection among hospitalized patients were analyzed. Viral gene sequencing and phylogenetic analysis were performed on samples from HCW who had a positive result.Results: A significant decrease in absenteeism was detected 3-4 weeks after the intervention at a time of increased transmission within the city. The prevalence of RT-PCR positivity among asymptomatic professio-nals was 17.3%. Phylogenetic analyses (59 samples) detected nine clusters, two of them strongly suggestive of intrahospital transmission with strains (75% B.1.1.28) circulating in the region during this period.Conclusions: Testing and placing asymptomatic professionals on leave contributed to control strategy for COVID-19 transmission in the hospital environment, and in reducing positivity and absenteeism, which directly influences the quality of care and exposes professionals to an extra load of stress.(c) 2022 Association for Professionals in Infection Control and Epidemiology, Inc.
- Evaluation of eleven immunochromatographic assays for SARS-CoV-2 detection: investigating the dengue cross-reaction(2022) OLIVEIRA, Beatriz Araujo; OLIVEIRA, Lea Campos de; OLIVEIRA, Franciane Mendes de; PEREIRA, Geovana Maria; SOUZA, Regina Maia de; MANULI, Erika Regina; MARCHINI, Fabricio Klerynton; ESPINOZA, Evelyn Patricia Sanchez; PARK, Marcelo; TANIGUCHI, Leandro; MENDES, Pedro Vitale; FRANCO, Lucas Augusto Moyses; NASTRI, Ana Catharina; OLIVEIRA, Maura Salaroli de; VIEIRA JUNIOR, Jose Mauro; KALLAS, Esper Georges; LEVIN, Anna Sara; SABINO, Ester Cerdeira; COSTA, Silvia FigueiredoCOVID-19 disease is spread worldwide and diagnostic techniques have been studied in order to contain the pandemic. Immunochromatographic (IC) assays are feasible and a low-cost alternative especially in low and middle-income countries, which lack structure to perform certain diagnostic techniques. Here we evaluate the sensitivity and specificity of eleven different IC tests in 145 serum samples from confirmed cases of COVID-19 using RT-PCR and 100 negative serum samples from blood donors collected in February 2019. We also evaluated the cross-reactivity with dengue using 20 serum samples from patients with confirmed diagnosis for dengue collected in early 2019 through four different tests. We found high sensitivity (92%), specificity (100%) and an almost perfect agreement (Kappa 0.92) of IC assay, especially when we evaluated IgG and IgM combined after 10 days from the onset of symptoms with RT-PCR. However, we detected cross-reactivity between dengue and COVID-19 mainly with IgM antibodies (5 to 20% of cross-reaction) and demonstrated the need for better studies about diagnostic techniques for these diseases.
- RHD and RHCE genotyping by next-generation sequencing is an effective strategy to identify molecular variants within sickle cell disease patients(2017) DEZAN, Marcia R.; RIBEIRO, Ingrid Helena; OLIVEIRA, Valeria B.; VIEIRA, Juliana B.; GOMES, Francisco C.; FRANCO, Lucas A. M.; VARUZZA, Leonardo; RIBEIRO, Roberto; CHINOCA, Karen Ziza; LEVI, Jose Eduardo; KRIEGER, Jose Eduardo; PEREIRA, Alexandre Costa; GUALANDRO, Sandra F. M.; ROCHA, Vanderson G.; MENDRONE-JUNIOR, Alfredo; SABINO, Ester Cerdeira; DINARDO, Carla LuanaBackground: The complexity of Rh genetic variation among sickle cell disease (SCD) patients is high. Conventional molecular assays cannot identify all genetic variants already described for the RH locus as well as foresee novel alleles. Sequencing RHD and RHCE is indicated to broaden the search for Rh genetic variants. Aims: To standardize the Next Generation Sequencing (NGS) strategy to assertively identify Rh genetic variants among SCD patients with serologic suspicion of Rh variants and evaluate if it can improve the transfusion support. Methods: Thirty-five SCD patients with unexplained Rh antibodies were enrolled. A NGS-based strategy was developed to genotype RHD and RHCE using gene-specific primers. Genotype and serological data were compared. Results: Data obtained from the NGS-based assay were gene-specific. Ten and 25 variant RHD and RHCE alleles were identified, respectively. Among all cases of unexplained Rh antibodies, 62% had been inaccurately classified by serological analysis and, of these, 73.1% were considered as relevant, as were associated with increased risk of hemolytic reactions and shortage of units suitable for transfusion. Conclusion: The NGS assay designed to genotype RH coding regions was effective and accurate in identifying variants. The proposed strategy clarified the Rh phenotype of most patients, improving transfusion support.
- Case Report: Cutaneous Leishmaniasis in a Rheumatoid Arthritis Patient Receiving Methotrexate(2022) AMATO, Valdir Sabbaga; SOUZA, Regina Maia de; FRANCO, Lucas Augusto Moyses; MARTINS, Roberta Cristina Ruedas; SILVA, Camila Alves Maia da; EMORI, Christini Takemi; CELESTE, Beatriz Julieta; CASTANHEIRA, Gabriel Victor; TUON, Felipe FranciscoThe immunosuppressive effect of methotrexate has rarely been associated with reactivation of cutaneous leishmaniasis. Here we present a case of a cutaneous leishmaniasis patient with atypical clinical symptoms without splenomegaly but with cutaneous manifestations after treatment of rheumatoid arthritis with methotrexate and blood recovery of the parasite. Next-generation sequencing was used to identify Leishmania infantum chagasi in the patient's blood sample.