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  1. Article ; Online: African ZIKV lineage fails to sustain infectivity in an in vitro mimetic urban cycle.

    Molina, Bárbara Floriano / Marques, Nayara Nathiê / Bittar, Cíntia / Batista, Mariana Nogueira / Rahal, Paula

    Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology

    2023  Volume 54, Issue 3, Page(s) 1421–1431

    Abstract: Zika virus (ZIKV) is an arbovirus maintained in nature in two distinct cycles of transmission: urban and sylvatic. Each cycle includes specific vertebrate and invertebrate hosts, and through alternate infections, a conserved consensus sequence is ... ...

    Abstract Zika virus (ZIKV) is an arbovirus maintained in nature in two distinct cycles of transmission: urban and sylvatic. Each cycle includes specific vertebrate and invertebrate hosts, and through alternate infections, a conserved consensus sequence is maintained that might vary depending on the cycle. The current study aimed to investigate the ability of ZIKV
    MeSH term(s) Animals ; Humans ; Zika Virus/genetics ; Zika Virus Infection ; Aedes ; Brazil
    Language English
    Publishing date 2023-07-17
    Publishing country Brazil
    Document type Journal Article
    ZDB-ID 2017175-4
    ISSN 1678-4405 ; 1517-8382
    ISSN (online) 1678-4405
    ISSN 1517-8382
    DOI 10.1007/s42770-023-01053-8
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Identification of differentially expressed miRNAs in human cells infected with different Zika virus strains.

    Machado, Francielly Cristina / Bittar, Cíntia / Rahal, Paula / Calmon, Marilia Freitas

    Archives of virology

    2021  Volume 166, Issue 6, Page(s) 1681–1689

    Abstract: Infection with distinct Zika virus (ZIKV) strains in in vitro and in vivo models has demonstrated that the host's response to infection is strain-dependent. There has been no analysis of the impact of infection with different ZIKV strains on miRNA ... ...

    Abstract Infection with distinct Zika virus (ZIKV) strains in in vitro and in vivo models has demonstrated that the host's response to infection is strain-dependent. There has been no analysis of the impact of infection with different ZIKV strains on miRNA expression in human cells. We investigated miRNA expression in PNT1A cells upon infection with an African ZIKV strain (MR766) and a Brazilian ZIKV strain (ZIKV
    MeSH term(s) Animals ; Chlorocebus aethiops ; Epithelial Cells/metabolism ; Epithelial Cells/virology ; Gene Expression Regulation/immunology ; Gene Regulatory Networks ; Humans ; MicroRNAs/genetics ; MicroRNAs/metabolism ; Vero Cells ; Zika Virus/classification
    Chemical Substances MicroRNAs
    Language English
    Publishing date 2021-04-13
    Publishing country Austria
    Document type Journal Article
    ZDB-ID 7491-3
    ISSN 1432-8798 ; 0304-8608
    ISSN (online) 1432-8798
    ISSN 0304-8608
    DOI 10.1007/s00705-021-05051-9
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Identification of differentially expressed miRNAs in human cells infected with different Zika virus strains

    Machado, Francielly Cristina / Bittar, Cíntia / Rahal, Paula / Calmon, Marilia Freitas

    Archives of virology. 2021 June, v. 166, no. 6

    2021  

    Abstract: Infection with distinct Zika virus (ZIKV) strains in in vitro and in vivo models has demonstrated that the host’s response to infection is strain-dependent. There has been no analysis of the impact of infection with different ZIKV strains on miRNA ... ...

    Abstract Infection with distinct Zika virus (ZIKV) strains in in vitro and in vivo models has demonstrated that the host’s response to infection is strain-dependent. There has been no analysis of the impact of infection with different ZIKV strains on miRNA expression in human cells. We investigated miRNA expression in PNT1A cells upon infection with an African ZIKV strain (MR766) and a Brazilian ZIKV strain (ZIKVᴮᴿ) using PCR array. Sixteen miRNAs were modulated in PNT1A cells: six miRNAs were modulated by both strains, while a set of ten miRNAs were modulated exclusively by ZIKVᴮᴿ infection. In silico analysis showed that nine significant KEGG pathways and eight significant GO terms were predicted to be enriched upon ZIKVᴮᴿ infection, and these pathways were related to cancer, environmental information processing, metabolism, and extracellular matrix. Differential modulation of miRNA expression suggests that distinct strains of ZIKV can differentially modulate the host response through the action of miRNAs.
    Keywords Zika virus ; computer simulation ; extracellular matrix ; humans ; metabolism ; microRNA ; virology
    Language English
    Dates of publication 2021-06
    Size p. 1681-1689.
    Publishing place Springer Vienna
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 7491-3
    ISSN 1432-8798 ; 0304-8608
    ISSN (online) 1432-8798
    ISSN 0304-8608
    DOI 10.1007/s00705-021-05051-9
    Database NAL-Catalogue (AGRICOLA)

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  4. Article ; Online: High Frequency of Epstein-Barr Virus and Absence of Papillomavirus in Breast Cancer Patients from Brazilian Northeast.

    Oliveira, Emanuele Silva De / Ferreira, Márcia Valéria Pitombeira / Rahal, Paula / Castelo Branco, Martan Barroso / Rabenhorst, Silvia Helena Barem

    Asian Pacific journal of cancer prevention : APJCP

    2022  Volume 23, Issue 7, Page(s) 2351–2359

    Abstract: Objective: This study aimed to determine the presence of Epstein-Barr Virus (EBV) and Human papillomavirus (HPV) in breast cancer with patients from Northeast of Brazil, considering the molecular subtypes and also taking in account the relation with ... ...

    Abstract Objective: This study aimed to determine the presence of Epstein-Barr Virus (EBV) and Human papillomavirus (HPV) in breast cancer with patients from Northeast of Brazil, considering the molecular subtypes and also taking in account the relation with TP53 immunoexpression.
    Methods: Seventy-five samples of invasive breast carcinoma with no special type were selected from pathology archives at Federal University of Ceará. EBV was detected by In situ hybridization (ISH) and immunohistochemistry (IHC) and HPV was detected by PCR. ISH was performed using EBER1 probe (Shibata et al., 1991; Bacchi et al., 1996) while IHC was performed on histological formalin-fixed paraffin-embedded tissue samples (Hsu et al., 1981). PCR methodology (Haws et al., 2004) was used to amplify the genetic material of human papillomavirus. The amplification products were electrophoretic analyzed on 1% agarose gel. The data analyses were carried out using the statistical software EPINFO® version 6.04d and SPSS version 17.0 (SPSS Inc., Chicago, IL). Statistically significant differences were evaluated by the chi-square test and Fisher's exact test and correlations between groups were analyzed by Spearman's and Pearson's rank correlation coefficient.
    Results: 69.4% of the cases were EBNA1 positives by IHC. EBNA1 positive tumors had lower Ki-67 index (0-40%), while EBNA1 negative cases had relevant higher Ki-67 index (41-100%) (p = 0.06). EBV was present in all tumor grades, with a high frequency in grade I and III tumors comparing to EBNA1 negative cases. No HPV positive cases were observed.
    Conclusion: Regarding the results from this study, we support the hypothesis that EBV can be involved on breast tumorigenesis.
    MeSH term(s) Brazil/epidemiology ; Breast Neoplasms/pathology ; DNA, Viral/analysis ; DNA, Viral/genetics ; Epstein-Barr Virus Infections/complications ; Epstein-Barr Virus Infections/epidemiology ; Female ; Herpesvirus 4, Human/genetics ; Humans ; Ki-67 Antigen ; Papillomaviridae/genetics
    Chemical Substances DNA, Viral ; Ki-67 Antigen
    Language English
    Publishing date 2022-07-01
    Publishing country Thailand
    Document type Journal Article
    ZDB-ID 2218955-5
    ISSN 2476-762X ; 1513-7368
    ISSN (online) 2476-762X
    ISSN 1513-7368
    DOI 10.31557/APJCP.2022.23.7.2351
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Clinical Landscape and Rate of Exposure to Ilheus Virus: Insights from Systematic Review and Meta-Analysis.

    da Costa, Vivaldo Gomes / Saivish, Marielena Vogel / Lino, Nikolas Alexander Borsato / Bittar, Cíntia / de Freitas Calmon, Marília / Nogueira, Maurício Lacerda / Rahal, Paula

    Viruses

    2022  Volume 15, Issue 1

    Abstract: Ilheus fever is a mosquito-borne, poorly known tropical disease. We aimed to report the pooled rate of exposure to the Ilheus virus (ILHV) and clinical outcomes of infection to determine the epidemiological patterns of ILHV. We conducted a meta-analysis ... ...

    Abstract Ilheus fever is a mosquito-borne, poorly known tropical disease. We aimed to report the pooled rate of exposure to the Ilheus virus (ILHV) and clinical outcomes of infection to determine the epidemiological patterns of ILHV. We conducted a meta-analysis of 37 studies (
    MeSH term(s) Animals ; Male ; Female ; Humans ; Infant, Newborn ; Infant ; Child, Preschool ; Child ; Adolescent ; Flavivirus ; Culicidae ; Brazil/epidemiology ; Phylogeny
    Language English
    Publishing date 2022-12-29
    Publishing country Switzerland
    Document type Meta-Analysis ; Systematic Review ; Journal Article ; Review ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 2516098-9
    ISSN 1999-4915 ; 1999-4915
    ISSN (online) 1999-4915
    ISSN 1999-4915
    DOI 10.3390/v15010092
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Second booster dose improves antibody neutralization against BA.1, BA.5 and BQ.1.1 in individuals previously immunized with CoronaVac plus BNT162B2 booster protocol.

    Campos, Guilherme R F / Almeida, Nathalie Bonatti Franco / Filgueiras, Priscilla Soares / Corsini, Camila Amormino / Gomes, Sarah Vieira Contin / de Miranda, Daniel Alvim Pena / de Assis, Jéssica Vieira / Silva, Thaís Bárbara de Souza / Alves, Pedro Augusto / Fernandes, Gabriel da Rocha / de Oliveira, Jaquelline Germano / Rahal, Paula / Grenfell, Rafaella Fortini Queiroz / Nogueira, Maurício L

    Frontiers in cellular and infection microbiology

    2024  Volume 14, Page(s) 1371695

    Abstract: Introduction: SARS-CoV-2 vaccines production and distribution enabled the return to normalcy worldwide, but it was not fast enough to avoid the emergence of variants capable of evading immune response induced by prior infections and vaccination. This ... ...

    Abstract Introduction: SARS-CoV-2 vaccines production and distribution enabled the return to normalcy worldwide, but it was not fast enough to avoid the emergence of variants capable of evading immune response induced by prior infections and vaccination. This study evaluated, against Omicron sublineages BA.1, BA.5 and BQ.1.1, the antibody response of a cohort vaccinated with a two doses CoronaVac protocol and followed by two heterologous booster doses.
    Methods: To assess vaccination effectiveness, serum samples were collected from 160 individuals, in 3 different time points (9, 12 and 18 months after CoronaVac protocol). For each time point, individuals were divided into 3 subgroups, based on the number of additional doses received (No booster, 1 booster and 2 boosters), and a viral microneutralization assay was performed to evaluate neutralization titers and seroconvertion rate.
    Results: The findings presented here show that, despite the first booster, at 9m time point, improved neutralization level against omicron ancestor BA.1 (133.1 to 663.3), this trend was significantly lower for BQ.1.1 and BA.5 (132.4 to 199.1, 63.2 to 100.2, respectively). However, at 18m time point, the administration of a second booster dose considerably improved the antibody neutralization, and this was observed not only against BA.1 (2361.5), but also against subvariants BQ.1.1 (726.1) and BA.5 (659.1). Additionally, our data showed that, after first booster, seroconvertion rate for BA.5 decayed over time (93.3% at 12m to 68.4% at 18m), but after the second booster, seroconvertion was completely recovered (95% at 18m).
    Discussion: Our study reinforces the concerns about immunity evasion of the SARS-CoV-2 omicron subvariants, where BA.5 and BQ.1.1 were less neutralized by vaccine induced antibodies than BA.1. On the other hand, the administration of a second booster significantly enhanced antibody neutralization capacity against these subvariants. It is likely that, as new SARS-CoV-2 subvariants continue to emerge, additional immunizations will be needed over time.
    MeSH term(s) Humans ; COVID-19 Vaccines ; BNT162 Vaccine ; Antibodies, Viral ; Immunization ; SARS-CoV-2 ; Antibodies, Neutralizing ; Vaccines, Inactivated
    Chemical Substances sinovac COVID-19 vaccine ; COVID-19 Vaccines ; BNT162 Vaccine ; Antibodies, Viral ; Antibodies, Neutralizing ; Vaccines, Inactivated
    Language English
    Publishing date 2024-04-04
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2619676-1
    ISSN 2235-2988 ; 2235-2988
    ISSN (online) 2235-2988
    ISSN 2235-2988
    DOI 10.3389/fcimb.2024.1371695
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Synthesis of copaiba (Copaifera officinalis) oil nanoemulsion and the potential against Zika virus: An in vitro study.

    Carvalho, Tamara / Landim, Marcela Guimarães / Lima, Maria Letícia Duarte / Bittar, Cíntia / Faria, Beatriz Carvalho de Araújo Oliveira / Rahal, Paula / de Lima, Milena Campelo Freitas / Junior, Valdir Florêncio da Veiga / Joanitti, Graziella Anselmo / Calmon, Marilia Freitas

    PloS one

    2023  Volume 18, Issue 9, Page(s) e0283817

    Abstract: Zika virus (ZIKV) has spread all over the world since its major outbreak in 2015. This infection has been recognized as a major global health issue due to the neurological complications related to ZIKV infection, such as Guillain-Barré Syndrome and Zika ... ...

    Abstract Zika virus (ZIKV) has spread all over the world since its major outbreak in 2015. This infection has been recognized as a major global health issue due to the neurological complications related to ZIKV infection, such as Guillain-Barré Syndrome and Zika virus Congenital Syndrome. Currently, there are no vaccines or specific treatments for ZIKV infection, which makes the development of specific therapies for its treatment very important. Several studies have been developed to analyze the potential of compounds against ZIKV, with the aim of finding new promising treatments. Herein, we evaluate the ability of a copaiba (Copaifera officinalis) oil nanoemulsion (CNE) to inhibit ZIKV. First, the highest non-cytotoxic concentration of 180 μg/mL was chosen since this concentration maintains 80% cell viability up to 96h after treatment with CNE in VERO cells resulted from MTT assay. The intracellular uptake assay was performed, and confirmed the internalization of the nanoemulsion in cells at all times analyzed. VERO cells were infected with ZIKV and simultaneously treated with CNE and the nanoformulation without oil (ENE) at the highest non-toxic concentration. The results evaluated by plaque assay revealed a viral inhibition of 80% for CNE and 70% for ENE. A dose-dependence assay revealed that the CNE treatment demonstrated a dose-dependent response in the viral RNA levels, whereas all ENE tested concentrations exhibited a similar degree of reduction. Taken together, our results suggest CNE as a promising nano-sized platform to be further studied for antiviral treatments.
    MeSH term(s) Chlorocebus aethiops ; Animals ; Zika Virus ; Zika Virus Infection ; Vero Cells ; Research Design ; Fabaceae
    Language English
    Publishing date 2023-09-07
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2267670-3
    ISSN 1932-6203 ; 1932-6203
    ISSN (online) 1932-6203
    ISSN 1932-6203
    DOI 10.1371/journal.pone.0283817
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Antiviral Evaluation of New Synthetic Bioconjugates Based on GA-Hecate: A New Class of Antivirals Targeting Different Steps of Zika Virus Replication.

    da Silva Sanches, Paulo Ricardo / Velazquez, Ricardo Sanchez / Batista, Mariana Nogueira / Carneiro, Bruno Moreira / Bittar, Cintia / De Lorenzo, Giuditta / Rahal, Paula / Patel, Arvind H / Cilli, Eduardo Maffud

    Molecules (Basel, Switzerland)

    2023  Volume 28, Issue 13

    Abstract: Re-emerging arboviruses represent a serious health problem due to their rapid vector-mediated spread, mainly in urban tropical areas. The 2013-2015 Zika virus (ZIKV) outbreak in South and Central America has been associated with cases of microcephaly in ... ...

    Abstract Re-emerging arboviruses represent a serious health problem due to their rapid vector-mediated spread, mainly in urban tropical areas. The 2013-2015 Zika virus (ZIKV) outbreak in South and Central America has been associated with cases of microcephaly in newborns and Guillain-Barret syndrome. We previously showed that the conjugate gallic acid-Hecate (GA-FALALKALKKALKKLKKALKKAL-CONH
    MeSH term(s) Infant, Newborn ; Humans ; Zika Virus ; Antiviral Agents/chemistry ; Zika Virus Infection ; Virus Replication ; Dermatologic Agents/pharmacology ; Gallic Acid/pharmacology
    Chemical Substances Antiviral Agents ; Dermatologic Agents ; Gallic Acid (632XD903SP)
    Language English
    Publishing date 2023-06-21
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 1413402-0
    ISSN 1420-3049 ; 1431-5165 ; 1420-3049
    ISSN (online) 1420-3049
    ISSN 1431-5165 ; 1420-3049
    DOI 10.3390/molecules28134884
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Detection of DENV-2 and ZIKV coinfection in southeastern Brazil by serum and urine testing.

    da Conceição, Pâmela Jóyce Previdelli / de Carvalho, Lucas Rodrigues / de Godoy, Bianca Lara Venâncio / Nogueira, Mauricio Lacerda / Terzian, Ana Carolina Bernardes / de Godoy, Moacir Fernandes / Calmon, Marília Freitas / Bittar, Cintia / Rahal, Paula

    Medical microbiology and immunology

    2023  Volume 212, Issue 3, Page(s) 193–201

    Abstract: Purpose: Aedes aegypti mosquito-borne diseases have a significant impact on public health in Brazil. In this study, we investigated the presence of the Zika virus (ZIKV) and dengue virus (DENV) in serum and urine samples from symptomatic participants ... ...

    Abstract Purpose: Aedes aegypti mosquito-borne diseases have a significant impact on public health in Brazil. In this study, we investigated the presence of the Zika virus (ZIKV) and dengue virus (DENV) in serum and urine samples from symptomatic participants who attended an Emergency Care Unit located in a city in the northwestern region of São Paulo between February 2018 and April 2019.
    Methods: Serum and urine samples were collected from participants suspected of having arbovirus infection. After the extraction of viral RNA, viral detection was performed by real-time quantitative reverse transcription polymerase chain reaction (RT-qPCR) (One-Step RT-qPCR).
    Results: A total of 305 participants participated in this study. A total of 283 blood and 270 urine samples were collected. Of 305 patients, 36.4% (111/305) were positive for ZIKV, 43.3% (132/305) for DENV2, and 0.3% (1/305) for DENV1. Coinfection with ZIKV/DENV2 was observed in 13.1% of participants. If only serum samples were used, ZIKV detection would have decreased to 23.3% (71/305). Of all the participants included in the study, only one was suspected of having ZIKV infection based on clinical diagnosis, and the remaining participants were suspected of having DENV.
    Conclusion: By testing serum and urine samples, we increased the detection of both viruses and detected considerable levels of ZIKV and DENV-2 coinfection when compared to other studies. Additionally, we detected an unnoticed ZIKV outbreak in the city. These findings highlight the importance of the molecular diagnosis of arboviruses to aid public health surveillance and management strategies.
    MeSH term(s) Animals ; Humans ; Zika Virus ; Zika Virus Infection/diagnosis ; Zika Virus Infection/epidemiology ; Dengue/diagnosis ; Dengue/epidemiology ; Dengue Virus/genetics ; Coinfection/diagnosis ; Coinfection/epidemiology ; Brazil/epidemiology ; Chikungunya Fever/diagnosis ; Chikungunya Fever/epidemiology ; Chikungunya virus/genetics
    Language English
    Publishing date 2023-04-07
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 120933-4
    ISSN 1432-1831 ; 0300-8584
    ISSN (online) 1432-1831
    ISSN 0300-8584
    DOI 10.1007/s00430-023-00762-z
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Necrotic activity of ExhC from Mammaliicoccus sciuri is mediated by specific amino acid residues.

    Gismene, Carolina / González, Jorge Enrique Hernández / de Freitas Calmon, Marília / Nascimento, Andrey Fabricio Ziem / Santisteban, Angela Rocio Niño / Calil, Felipe Antunes / da Silva, Alana Della Torre / Rahal, Paula / Góes, Rejane Maira / Arni, Raghuvir Krishnaswamy / Mariutti, Ricardo Barros

    International journal of biological macromolecules

    2023  Volume 254, Issue Pt 1, Page(s) 127741

    Abstract: Mammaliicoccus sciuri, a commensal and pathogenic bacterium of significant clinical and veterinary relevance, expresses exfoliative toxin C (ExhC), a specific glutamyl endopeptidase belonging to the chymotrypsin family as the principal virulence factor. ... ...

    Abstract Mammaliicoccus sciuri, a commensal and pathogenic bacterium of significant clinical and veterinary relevance, expresses exfoliative toxin C (ExhC), a specific glutamyl endopeptidase belonging to the chymotrypsin family as the principal virulence factor. However, unlike most members of this family, ETs are inactive against a wide range of substrates and possess exquisite specificity for desmoglein-1 (Dsg1), a cadherin-like adhesion molecule that is crucial to maintain tissue integrity, thereby preventing the separation of skin cells and the entry of pathogens. ExhC is of clinical importance since in addition to causing exfoliation in pigs and mice, it induces necrosis in multiple mammalian cell lines, a property not observed for other ETs. Previous experiments have implicated the ExhC
    MeSH term(s) Animals ; Swine ; Mice ; Amino Acids/metabolism ; Exfoliatins/genetics ; Exfoliatins/metabolism ; Exfoliatins/pharmacology ; Staphylococcus ; Necrosis ; Mammals/metabolism
    Chemical Substances Amino Acids ; Exfoliatins
    Language English
    Publishing date 2023-10-29
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 282732-3
    ISSN 1879-0003 ; 0141-8130
    ISSN (online) 1879-0003
    ISSN 0141-8130
    DOI 10.1016/j.ijbiomac.2023.127741
    Database MEDical Literature Analysis and Retrieval System OnLINE

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