LIM/52 - Laboratório de Virologia
URI Permanente desta comunidade
O Laboratório de Virologia é ligado ao Departamento de Moléstias Infecciosas e Parasitárias da Faculdade de Medicina da Universidade de São Paulo (FMUSP).
Linhas de pesquisa: infecções virais em pacientes imunodeprimidos; epidemiologia molecular das doenças virais; desenvolvimento e avaliação de métodos de métodos para diagnóstico de infecções virais; avaliação de vacinas em saúde pública; inquéritos soroepidemiológicos de infecções virais.
Site oficial: http://limhc.fm.usp.br/portal/lim52-laboratorio-de-virologia/
Linhas de pesquisa: infecções virais em pacientes imunodeprimidos; epidemiologia molecular das doenças virais; desenvolvimento e avaliação de métodos de métodos para diagnóstico de infecções virais; avaliação de vacinas em saúde pública; inquéritos soroepidemiológicos de infecções virais.
Site oficial: http://limhc.fm.usp.br/portal/lim52-laboratorio-de-virologia/
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- LIM/52 - Laboratório de Virologia
- LIM/52 - Laboratório de Virologia
- LIM/52 - Laboratório de Virologia
Submissões Recentes
Infecção pelo vírus Epstein-Barr (EBV) - mononucleose infecciosa
(2021) FINK, Maria Cristina Domingues da Silva; MENDOZA, Tania Regina Tozetto; BRAZ-SILVA, Paulo Henrique
EZH2 Expression Correlates With T-Cell Infiltration in Oral Leukoplakia and Predicts Cancer Transformation
(2023) GANESH, Divya; DAFAR, Amal; NIKLASSON, Julia; SANDBERG, Ingrid; BRAZ-SILVA, Paulo; SAPKOTA, Dipak; OHMAN, Jenny; GIGLIO, Daniel; HASSEUS, Bengt
Background/Aim: The EZH2 complex is involved in cellular proliferation and modulates the immune response in cancer. Less is known about the importance of EZH2 in precancerous lesions such as oral leukoplakia (OL). The aim of the study was to explore the association between EZH2 expression, immune activation, and cancer transformation in OL. Patients and Methods: Analyses were retrospectively performed on nine OL cases that had undergone transformation to oral squamous cell carcinoma (OSCC; OL-ca) and nine that had not undergone transformation (OL-non). EZH2-expressing cells, CD3+ and CD8+ T cells, and CD1a+ Langerhans cells were visualized with immunohistofluorescence and counted. Results: A moderate positive correlation between CD3-and EZH2-expressing and CD8-and EZH2-expressing cells in the epithelium was found (r=0.57, p=0.01; r=0.59, p=0.01). The number of EZH2-expressing cells in the epithelium of OL-ca was significantly higher compared to OL-non (p=0.0002). Cancer - free survival rates differed significantly between patients with EZH2high compared to EZH2low expression (p=0.001). EZH2high expression in OL epithelium was associated with a 13-fold higher risk for developing OSCC (HR=12.8). Conclusion: EZH2 expression in oral epithelium predicts OSCC transformation of OL and correlates with the level of T-cell infiltration.
Data-driven, cross-disciplinary collaboration: lessons learned at the largest academic health center in Latin America during the COVID-19 pandemic
(2024) RITTO, Ana Paula; ARAUJO, Adriana Ladeira de; CARVALHO, Carlos Roberto Ribeiro de; SOUZA, Heraldo Possolo De; FAVARETTO, Patricia Manga e Silva; SABOYA, Vivian Renata Boldrim; GARCIA, Michelle Louvaes; KULIKOWSKI, Leslie Domenici; KALLAS, Esper Georges; PEREIRA, Antonio Jose Rodrigues; COBELLO JUNIOR, Vilson; SILVA, Katia Regina; ABDALLA, Eidi Raquel Franco; SEGURADO, Aluisio Augusto Cotrim; SABINO, Ester Cerdeira; RIBEIRO JUNIOR, Ulysses; FRANCISCO, Rossana Pulcineli Vieira; MIETHKE-MORAIS, Anna; LEVIN, Anna Sara Shafferman; SAWAMURA, Marcio Valente Yamada; FERREIRA, Juliana Carvalho; SILVA, Clovis Artur; MAUAD, Thais; GOUVEIA, Nelson da Cruz; LETAIF, Leila Suemi Harima; BEGO, Marco Antonio; BATTISTELLA, Linamara Rizzo; DUARTE, Alberto Jose da Silva; SEELAENDER, Marilia Cerqueira Leite; MARCHINI, Julio; FORLENZA, Orestes Vicente; ROCHA, Vanderson Geraldo; MENDES-CORREA, Maria Cassia; COSTA, Silvia Figueiredo; CERRI, Giovanni Guido; BONFA, Eloisa Silva Dutra de Oliveira; CHAMMAS, Roger; BARROS FILHO, Tarcisio Eloy Pessoa de; BUSATTO FILHO, Geraldo
Introduction The COVID-19 pandemic has prompted global research efforts to reduce infection impact, highlighting the potential of cross-disciplinary collaboration to enhance research quality and efficiency.Methods At the FMUSP-HC academic health system, we implemented innovative flow management routines for collecting, organizing and analyzing demographic data, COVID-related data and biological materials from over 4,500 patients with confirmed SARS-CoV-2 infection hospitalized from 2020 to 2022. This strategy was mainly planned in three areas: organizing a database with data from the hospitalizations; setting-up a multidisciplinary taskforce to conduct follow-up assessments after discharge; and organizing a biobank. Additionally, a COVID-19 curated collection was created within the institutional digital library of academic papers to map the research output.Results Over the course of the experience, the possible benefits and challenges of this type of research support approach were identified and discussed, leading to a set of recommended strategies to enhance collaboration within the research institution. Demographic and clinical data from COVID-19 hospitalizations were compiled in a database including adults and a minority of children and adolescents with laboratory confirmed COVID-19, covering 2020-2022, with approximately 350 fields per patient. To date, this database has been used in 16 published studies. Additionally, we assessed 700 adults 6 to 11 months after hospitalization through comprehensive, multidisciplinary in-person evaluations; this database, comprising around 2000 fields per subject, was used in 15 publications. Furthermore, thousands of blood samples collected during the acute phase and follow-up assessments remain stored for future investigations. To date, more than 3,700 aliquots have been used in ongoing research investigating various aspects of COVID-19. Lastly, the mapping of the overall research output revealed that between 2020 and 2022 our academic system produced 1,394 scientific articles on COVID-19.Discussion Research is a crucial component of an effective epidemic response, and the preparation process should include a well-defined plan for organizing and sharing resources. The initiatives described in the present paper were successful in our aim to foster large-scale research in our institution. Although a single model may not be appropriate for all contexts, cross-disciplinary collaboration and open data sharing should make health research systems more efficient to generate the best evidence.
Rapid viral metagenomics using SMART-9N amplification and nanopore sequencing
(2023) CLARO, I. M.; RAMUNDO, M. S.; COLETTI, T. M.; SILVA, C. A. M. da; VALENCA, I. N.; CANDIDO, D. S.; SALES, F. C. S.; MANULI, E. R.; JESUS, J. G. de; PAULA, A. de; FELIX, A. C.; ANDRADE, P. D. S.; PINHO, M. C.; SOUZA, W. M.; AMORIM, M. R.; PROENCA-MODENA, J. L.; KALLAS, E. G.; LEVI, J. E.; FARIA, N. R.; SABINO, E. C.; LOMAN, N. J.; QUICK, J.
Emerging and re-emerging viruses are a global health concern. Genome sequencing as an approach for monitoring circulating viruses is currently hampered by complex and expensive methods. Untargeted, metagenomic nanopore sequencing can provide genomic information to identify pathogens, prepare for or even prevent outbreaks. SMART (Switching Mechanism at the 5′ end of RNA Template) is a popular approach for RNA-Seq but most current methods rely on oligo-dT priming to target polyadenylated mRNA molecules. We have developed two random primed SMART-Seq approaches, a sequencing agnostic approach ‘SMART-9N’ and a version compatible rapid adapters available from Oxford Nanopore Technologies ‘Rapid SMART-9N’. The methods were developed using viral isolates, clinical samples, and compared to a gold-standard amplicon-based method. From a Zika virus isolate the SMART-9N approach recovered 10kb of the 10.8kb RNA genome in a single nanopore read. We also obtained full genome coverage at a high depth coverage using the Rapid SMART-9N, which takes only 10 minutes and costs up to 45% less than other methods. We found the limits of detection of these methods to be 6 focus forming units (FFU)/mL with 99.02% and 87.58% genome coverage for SMART-9N and Rapid SMART-9N respectively. Yellow fever virus plasma samples and SARS-CoV-2 nasopharyngeal samples previously confirmed by RT-qPCR with a broad range of Ct-values were selected for validation. Both methods produced greater genome coverage when compared to the multiplex PCR approach and we obtained the longest single read of this study (18.5 kb) with a SARS-CoV-2 clinical sample, 60% of the virus genome using the Rapid SMART-9N method. This work demonstrates that SMART-9N and Rapid SMART-9N are sensitive, low input, and long-read compatible alternatives for RNA virus detection and genome sequencing and Rapid SMART-9N improves the cost, time, and complexity of laboratory work.
MOG-IgA characterizes a subgroup of patients with central nervous system demyelination
(2023) GOMES, Ana Beatriz Ayroza Galvao Ribeiro; KULSVEHAGEN, Laila; LIPPS, Patrick; CAGOL, Alessandro; FUERTES, Nuria Cerda; NEZIRAJ, Tradite; FLAMMER, Julia; LERNER, Jasmine; LECOURT, Anne-Catherine; SIEBENBORN, Nina de Oliveira S.; CORTESE, Rosa; SCHADELIN, Sabine; SCHOEPS, Vinicius; MATOS, Aline; MENDES, Natalia; PEREIRA, Clarissa dos Reis; MONTEIRO, Mario Luiz; PEREIRA, Samira Luisa Dos Apostolos; SCHINDLER, Patrick; CHIEN, Claudia; SCHWAKE, Carolin; SCHNEIDER, Ruth; PAKEERATHAN, Thivya; KIM, Ki Hoon; AKTAS, Orhan; FISCHER, Urs; MEHLING, Matthias; DERFUSS, Tobias; KAPPOS, Ludwig; AYZENBERG, Ilya; RINGELSTEIN, Marius; PAUL, Friedemann; CALLEGARO, Dagoberto; KIM, Ho Jin; KUHLE, Jens; PAPADOPOULOU, Athina; GRANZIERA, Cristina; PROBSTEL, Anne-Katrin
retinal changes in patients with immunoglobulin a antibodies against myelin oligodendrocyte glycoprotein
(2023) FUERTES, Nuria Cerda; BEATRIZ, Ayroza Galvao Ribeiro Gomes Ana; KULSVEHAGEN, Laila; LIPPS, Patrick; NEZIRAJ, Tradite; FLAMMER, Julia; LERNER, Jasmine; LECOURT, Anne-Catherine; PEREIRA, Clarissa dos Reis; MONTEIRO, Mario Luiz; SCHINDLER, Patrick; SCHOEPS, Vinicius Andreoli; MATOS, Aline; MENDES, Natalia; SCHWAKE, Carolin; PAKEERATHAN, Thivya; AKTAS, Orhan; FISCHER, Urs; DERFUSS, Tobias; KAPPOS, Ludwig; AYZENBERG, Ilya; RINGELSTEIN, Marius; PAUL, Friedemann; CALLEGARO, Dagoberto; GRANZIERA, Cristina; KUHLE, Jens; PROBSTEL, Anne-Katrin; PAPADOPOULOU, Athina
PRE-EMPTIVE RITUXIMAB FOR EBV REACTIVATION IN TIMES OF COVID-19: IS IT REALLY NECESSARY?
(2023) SANTOS, Ana Claudia Ferrari dos; SIMIONE, Anderson Joao; SOUZA, Anna Beatriz Coelho de; MORENO, Juliana Ribeiro do Prado; ZANETTI, Lilian Perilio; OLIVEIRA, Leila Cibele Serra; COLTURATO, Iago; BARBIERI, Fernanda Rodrigues; SANTOS, Juliana Silva; DELATTRE, Erika Rodrigues Pontes; MASCARENHAS, Carolina Ferreira; PEGORARI, Leticia Galbier Ricetto; SOUZA, Mair Pedro de; COLTURATO, Vergilio Antonio Rensi; MACHADO, Clarisse Martins
Noninvasive Techniques for Management of Erythema Multiforme
(2023) MARTINS, Fabiana; PALLOS, Debora; CANDEIA, Jodkandlys; ZERBINATI, Rodrigo; BRAZ-SILVA, Paulo Henrique; CAMPOS, Luana
An 18-year-old man was referred for a diagnosis of extensive oral lesions. During the interview, he reported a medical history of ganglionic tuberculosis, type 2 herpes infection, and significant weight loss due to dysphagia. Intraoral exam revealed multiple painful and ulcerated lesions covered by pseudomembrane. Lesions were observed on the labial and buccal mucosa, tongue, and soft palate. The laboratory findings included serum positivity for the Epstein-Barr virus, and salivary tests showed positive values for herpes simplex virus (HSV-2) and human herpesvirus (HHV-7). The diagnostic hypothesis was based on clinical findings and viral infection detected in the saliva, which triggered an immunological disorder, that is, erythema multiforme (EM). The treatment consisted of antimicrobial photodynamic therapy (aPDT), with substantial improvement in pain and healing as seen in the following twenty-four hours. Complete resolution of the lesions was achieved five days after the first session. Once the diagnosis of virus-induced EM was confirmed, noninvasive techniques (e.g., salivary tests and aPDT) were very successful and can be indicated for managing these lesions.
Cone-beam computed tomography texture analysis can help differentiate odontogenic and non-odontogenic maxillary sinusitis
(2023) COSTA, Andre Luiz Ferreira; FARDIM, Karolina Aparecida Castilho; RIBEIRO, Isabela Teixeira; JARDINI, Maria Aparecida Neves; BRAZ-SILVA, Paulo Henrique; ORHAN, Kaan; LOPES, Sergio Lucio Pereira de Castro
Purpose: This study aimed to assess texture analysis (TA) of cone-beam computed tomography (CBCT) images as a quantitative tool for the differential diagnosis of odontogenic and non-odontogenic maxillary sinusitis (OS and NOS, respectively).Materials and Methods: CBCT images of 40 patients diagnosed with OS (N = 20) and NOS (N = 20) were evaluated. The gray level co-occurrence (GLCM) matrix parameters, and gray level run length matrix texture (GLRLM) parameters were extracted using manually placed regions of interest on lesion images. Seven texture parameters were calculated using GLCM and 4 parameters using GLRLM. The Mann-Whitney test was used for comparisons between the groups, and the Levene test was performed to confirm the homogeneity of variance (alpha = 5%).Results: The results showed statistically significant differences (P<0.05) between the OS and NOS patients regarding 3 TA parameters. NOS patients presented higher values for contrast, while OS patients presented higher values for correlation and inverse difference moment. Greater textural homogeneity was observed in the OS patients than in the NOS patients, with statistically significant differences in standard deviations between the groups for correlation, sum of squares, sum of entropy, and entropy.Conclusion: TA enabled quantitative differentiation between OS and NOS on CBCT images by using the parameters of contrast, correlation, and inverse difference moment. (Imaging Sci Dent 20220166)
Nanobiotics and the One Health Approach: Boosting the Fight against Antimicrobial Resistance at the Nanoscale
(2023) Himanshu; MUKHERJEE, Riya; VIDIC, Jasmina; LEAL, Elcio; COSTA, Antonio Charlys da; PRUDENCIO, Carlos Roberto; RAJ, V. Samuel; CHANG, Chung-Ming; PANDEY, Ramendra Pati
Antimicrobial resistance (AMR) is a growing public health concern worldwide, and it poses a significant threat to human, animal, and environmental health. The overuse and misuse of antibiotics have contributed significantly and others factors including gene mutation, bacteria living in biofilms, and enzymatic degradation/hydrolyses help in the emergence and spread of AMR, which may lead to significant economic consequences such as reduced productivity and increased health care costs. Nanotechnology offers a promising platform for addressing this challenge. Nanoparticles have unique properties that make them highly effective in combating bacterial infections by inhibiting the growth and survival of multi-drug-resistant bacteria in three areas of health: human, animal, and environmental. To conduct an economic evaluation of surveillance in this context, it is crucial to obtain an understanding of the connections to be addressed by several nations by implementing national action policies based on the One Health strategy. This review provides an overview of the progress made thus far and presents potential future directions to optimize the impact of nanobiotics on AMR.