CAMILA MALTA ROMANO
Projetos de Pesquisa
Unidades Organizacionais
LIM/52 - Laboratório de Virologia, Hospital das Clínicas, Faculdade de Medicina
11 resultados
Resultados de Busca
Agora exibindo 1 - 10 de 11
- Detection of Reticuloendotheliosis Virus in Muscovy Ducks, Wild Turkeys, and Chickens in Brazil(2020) CALEIRO, Giovana S.; NUNES, Cristina F.; URBANO, Paulo R.; KIRCHGATTER, Karin; ARAUJO, Jansen de; DURIGON, Edison Luiz; THOMAZELLI, Luciano M.; STEWART, Brittany M.; EDWARDS, Dustin C.; ROMANO, Camila M.Reticuloendotheliosis viruses (REVs) are known to cause immunosuppressive and oncogenic disease that affects numerous avian species. Reticuloendotheliosis viruses are present worldwide and recently have been reported in South America with cases of infected commercial flocks in Argentina. We surveyed for the presence of REV in birds from a state in the northern region of Brazil using real-time PCR. We report here the presence of REV in Brazil, detected in Muscovy Ducks (Cairina moschata), Wild Turkeys (Meleagris gallopavo), and chickens (Gallus gallus) at a relatively high prevalence (16.8%). Phylogenetic analysis indicated a close relationship of these strains to variants in the US. This study provides evidence of REV in the Amazon biome and provides a baseline for future surveillance of the virus in the region and throughout Brazil.
- Genome Sequence of Fowlpox Virus-Integrated Reticuloendotheliosis Virus from a Rio Grande Wild Turkey (Meleagris gallopavo intermedia)(2022) WILLIS, Bianca; TRAUTMAN, Camille; COX, Faith; LUJAN, Tiffany; HARDIN, Jason; DITTMAR, Robert; ROMANO, Camila; BRADY, Jeff; EDWARDS, DustinWe report the genome sequence of a nearly intact reticuloendotheliosis virus (REV) insertion within a field strain of fowlpox virus from a Rio Grande wild turkey in Gillespie County, TX. The proviral REV genome comprises 7,943 bp and contains partial long terminal repeats.
- Inter- and Intra-Host Viral Diversity in a Large Seasonal DENV2 Outbreak(2013) ROMANO, Camila Malta; LAUCK, Michael; SALVADOR, Felipe S.; LIMA, Celia Rodrigues; VILLAS-BOAS, Lucy S.; ARAUJO, Evaldo Stanislau A.; LEVI, Jose Eduardo; PANNUTI, Claudio Sergio; O'CONNOR, David; KALLAS, Esper GeorgesBackground: High genetic diversity at both inter-and intra-host level are hallmarks of RNA viruses due to the error-prone nature of their genome replication. Several groups have evaluated the extent of viral variability using different RNA virus deep sequencing methods. Although much of this effort has been dedicated to pathogens that cause chronic infections in humans, few studies investigated arthropod-borne, acute viral infections. Methods and Principal Findings: We deep sequenced the complete genome of ten DENV2 isolates from representative classical and severe cases sampled in a large outbreak in Brazil using two different approaches. Analysis of the consensus genomes confirmed the larger extent of the 2010 epidemic in comparison to a previous epidemic caused by the same viruses in another city two years before (genetic distance = 0.002 and 0.0008 respectively). Analysis of viral populations within the host revealed a high level of conservation. After excluding homopolymer regions of 454/Roche generated sequences, we found 10 to 44 variable sites per genome population at a frequency of >1%, resulting in very low intra-host genetic diversity. While up to 60% of all variable sites at intra-host level were non-synonymous changes, only 10% of inter-host variability resulted from non-synonymous mutations, indicative of purifying selection at the population level. Conclusions and Significance: Despite the error-prone nature of RNA-dependent RNA-polymerase, dengue viruses maintain low levels of intra-host variability.
- An international, interlaboratory ring trial confirms the feasibility of an extraction-less ""direct"" RT-qPCR method for reliable detection of SARS-CoV-2 RNA in clinical samples(2022) MILLS, Margaret G.; BRUCE, Emily; HUANG, Meei-Li; CROTHERS, Jessica W.; HYRIEN, Ollivier; OURA, Christopher A. L.; BLAKE, Lemar; JORDAN, Arianne Brown; HESTER, Susan; WEHMAS, Leah; MARI, Bernard; BARBY, Pascal; LACOUX, Caroline; FASSY, Julien; VIAL, Pablo; VIAL, Cecilia; MARTINEZ, Jose R. W.; OLADIPO, Olusola Olalekan; INUWA, Bitrus; SHITTU, Ismaila; MESEKO, Clement A.; CHAMMAS, Roger; SANTOS, Carlos Ferreira; DIONISIO, Thiago Jose; GARBIERI, Thais Francini; PARISI, Viviane Aparecida; MENDES-CORREA, Maria Cassia; PAULA, Anderson V. de; ROMANO, Camila M.; GOES, Luiz Gustavo Bentim; MINOPRIO, Paola; CAMPOS, Angelica C.; CUNHA, Marielton P.; VILELA, Ana Paula P.; NYIRENDA, Tonney; MKAKOSYA, Rajhab Sawasawa; MUULA, Adamson S.; DUMM, Rebekah E.; HARRIS, Rebecca M.; MITCHELL, Constance A.; PETTIT, Syril; BOTTEN, Jason; JEROME, Keith R.Reverse transcription-quantitative polymerase chain reaction (RT-qPCR) is used worldwide to test and trace the spread of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). ""Extraction-less"" or ""direct"" real time-reverse transcription polymerase chain reaction (RT-PCR) is a transparent and accessible qualitative method for SARS-CoV-2 detection from nasopharyngeal or oral pharyngeal samples with the potential to generate actionable data more quickly, at a lower cost, and with fewer experimental resources than full RT-qPCR. This study engaged 10 global testing sites, including laboratories currently experiencing testing limitations due to reagent or equipment shortages, in an international interlaboratory ring trial. Participating laboratories were provided a common protocol, common reagents, aliquots of identical pooled clinical samples, and purified nucleic acids and used their existing in-house equipment. We observed 100% concordance across laboratories in the correct identification of all positive and negative samples, with highly similar cycle threshold values. The test also performed well when applied to locally collected patient nasopharyngeal samples, provided the viral transport media did not contain charcoal or guanidine, both of which appeared to potently inhibit the RT-PCR reaction. Our results suggest that direct RT-PCR assay methods can be clearly translated across sites utilizing readily available equipment and expertise and are thus a feasible option for more efficient COVID-19 coronavirus disease testing as demanded by the continuing pandemic.
conferenceObject SYNDECAN-1 AS A BIOMARKER OF SEVERITY IN ACUTE YELLOW FEVER(2019) SOUSA, Francielle Tramontini Gomes de; MANULI, Erika R.; ZANELLA, Luiz G.; HO, Yeh-Li; NETTO, Lucas Chaves; MARMORATO, Mariana P.; DIAS, Juliana Z.; THOMAZELLA, Mateus V.; CORREIA, Carolina A.; SILVEIRA, Cassia G.; COSTA, Priscilla R.; PEREIRA, Geovana M.; FERREIRA, Midia S.; ROMANO, Camila M.; KALLAS, Esper G.; HARRIS, Eva; SABINO, Ester C.- Serum from dengue virus-infected patients with and without plasma leakage differentially affects endothelial cells barrier function in vitro(2017) CARDOZO, Francielle Tramontini Gomes de Sousa; BAIMUKANOVA, Gyulnar; LANTERI, Marion Christine; KEATING, Sheila Marie; FERREIRA, Frederico Moraes; HEITMAN, John; PANNUTI, Claudio Sergio; PATI, Shibani; ROMANO, Camila Malta; SABINO, Ester CerdeiraBackground Although most of cases of dengue infections are asymptomatic or mild symptomatic some individuals present warning signs progressing to severe dengue in which plasma leakage is a hallmark. Methodology/Principal findings The present study used Electric Cell-substrate Impedance Sensing (ECIS (R)) which allows for electrical monitoring of cellular barrier function measuring changes in Transendothelial Electric Resistance (TEER) to investigate the parameters associated with dengue induced leakage. Three groups of individuals were tested: dengue-positives with plasma leakage (leakage), dengue-positives without plasma leakage (no leakage), and dengue-negatives (control). Data show that TEER values of human umbilical vein endothelial cells (HUVECs) was significantly lower after incubation with serum from subjects of the leakage group in comparison to the no leakage or control groups. The serum levels of CXCL1, EGF, eotaxin, IFN-gamma, sCD40L, and platelets were significantly decreased in the leakage group, while IL-10, IL-6, and IP-10 levels were significantly increased. We also found a strong correlation between TEER values and augmented levels of IP-10, GM-CSF, IL-1 alpha, and IL-8, as well as decreased levels of CXCL1 and platelets. Conclusions/Significance The present work shows that the magnitude of the immune response contributes to the adverse plasma leakage outcomes in patients and that serum components are important mediators of changes in endothelial homeostasis during dengue infections. In particular, the increased levels of IP-10 and the decreased levels of CXCL1 and platelets seem to play a significant role in the disruption of vascular endothelium associated with leakage outcomes after DENV infection. These findings may have important implications for both diagnostic and therapeutic approaches to predict and mitigate vascular permeabilization in those experiencing the most severe clinical disease outcomes after dengue infection.
conferenceObject AGARICUS BRASILIENSIS SULFATED POLYSACCHARIDE INHIBITS DENGUE VIRUS INFECTION AND DENGUE VIRUS NS1-MEDIATED PATHOGENESIS(2019) SOUSA, Francielle Tramontini Gomes de; ROMANO, Camila Malta; SABINO, Ester Cerdeira; HARRIS, Eva- Sulfated beta-glucan from Agaricus subrufescens inhibits flavivirus infection and nonstructural protein 1-mediated pathogenesis(2022) SOUSA, Francielle Tramontini Gomes de; BIERING, Scott B.; PATEL, Trishna S.; BLANC, Sophie F.; CAMELINI, Carla M.; VENZKE, Dalila; NUNES, Ricardo J.; ROMANO, Camila M.; BEATTY, P. Robert; SABINO, Ester C.; HARRIS, EvaDespite substantial morbidity and mortality, no therapeutic agents exist for treatment of dengue or Zika, and the currently available dengue vaccine is only recommended for dengue virus (DENV)-immune individuals. Thus, development of therapeutic and/or preventive drugs is urgently needed. DENV and Zika virus (ZIKV) nonstructural protein 1 (NS1) can directly trigger endothelial barrier dysfunction and induce inflammatory re-sponses, contributing to vascular leak in vivo. Here we evaluated the efficacy of the (1-6,1-3)-beta-D-glucan isolated from Agaricus subrufescens fruiting bodies (FR) and its sulfated derivative (FR-S) against DENV-2 and ZIKV infection and NS1-mediated pathogenesis. FR-S, but not FR, significantly inhibited DENV-2 and ZIKV replication in human monocytic cells (EC50 = 36.5 and 188.7 mu g/mL, respectively) when added simultaneously with viral infection. No inhibitory effect was observed when FR or FR-S were added post-infection, suggesting inhibition of viral entry as a mechanism of action. In an in vitro model of endothelial permeability using human pulmonary microvascular endothelial cells (HPMECs), FR and FR-S (0.12 mu g/mL) inhibited DENV-2 NS1-and ZIKV NS1-induced hyperpermeability by 50% and 100%, respectively, as measured by Trans-Endothelial Electrical Resistance. Treatment with 0.25 mu g/mL of FR and FR-S inhibited DENV-2 NS1 binding to HPMECs. Further, FR-S significantly reduced intradermal hyperpermeability induced by DENV-2 NS1 in C57BL/6 mice and protected against DENV-induced morbidity and mortality in a murine model of dengue vascular leak syndrome. Thus, we demonstrate efficacy of FR-S against DENV and ZIKV infection and NS1-induced endothelial permeability in vitro and in vivo. These findings encourage further exploration of FR-S and other glycan candidates for flavivirus treatment alone or in combination with compounds with different mechanisms of action.
- Near-Complete Proviral Genome Sequence of Reticuloendotheliosis Virus Isolated from an Attwater's Prairie Chicken (Tympanuchus cupido attwateri)(2022) WILLIS, Bianca; STEWART, Brittany; COX, Faith; LUJAN, Tiffany; HAEFELE, Holly; ROMANO, Camila; BRADY, Jeff; EDWARDS, DustinWe report the near-complete proviral genome sequence of a reticuloendo- theliosis virus isolated and propagated from an endangered Attwater's prairie chicken (Tympanuchus cupido &twofers) during a 2016-2017 outbreak at a captive breeding facility.
- Genomic and epidemiological characterisation of a dengue virus outbreak among blood donors in Brazil(2017) FARIA, Nuno R.; COSTA, Antonio Charlys da; LOURENCO, Jose; LOUREIRO, Paula; LOPES, Maria Esther; RIBEIRO, Roberto; ALENCAR, Cecilia Salete; KRAEMER, Moritz U. G.; VILLABONA-ARENAS, Christian J.; WU, Chieh-Hsi; THEZE, Julien; KHAN, Kamran; BRENT, Shannon E.; ROMANO, Camila; DELWART, Eric; CUSTER, Brian; BUSCH, Michael P.; PYBUS, Oliver G.; SABINO, Ester C.Outbreaks caused by Dengue, Zika and Chikungunya viruses can spread rapidly in immunologically naive populations. By analysing 92 newly generated viral genome sequences from blood donors and recipients, we assess the dynamics of dengue virus serotype 4 during the 2012 outbreak in Rio de Janeiro. Phylogenetic analysis indicates that the outbreak was caused by genotype II, although two isolates of genotype I were also detected for the first time in Rio de Janeiro. Evolutionary analysis and modelling estimates are congruent, indicating a reproduction number above 1 between January and June, and at least two thirds of infections being unnoticed. Modelling analysis suggests that viral transmission started in early January, which is consistent with multiple introductions, most likely from the northern states of Brazil, and with an increase in within-country air travel to Rio de Janeiro. The combination of genetic and epidemiological data from blood donor banks may be useful to anticipate epidemic spread of arboviruses.