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  1. Article ; Online: Immunity, virus evolution, and effectiveness of SARS-CoV-2 vaccines.

    Belizário, J E

    Brazilian journal of medical and biological research = Revista brasileira de pesquisas medicas e biologicas

    2021  Volume 54, Issue 5, Page(s) e10725

    Abstract: Phylogenetic and pathogenesis studies of the severe acute respiratory syndrome-related coronaviruses (SARS-CoVs) strains have highlighted some specific mutations that could confer the RNA genome fitness advantages and immunological resistance for their ... ...

    Abstract Phylogenetic and pathogenesis studies of the severe acute respiratory syndrome-related coronaviruses (SARS-CoVs) strains have highlighted some specific mutations that could confer the RNA genome fitness advantages and immunological resistance for their rapid spread in the human population. The analyses of 30 kb RNA SARS-CoVs genome sequences, protein structures, and functions have provided us a perspective of how host-virus protein-protein complexes act to mediate virus infection. The open reading frame (ORF)1a and ORF1b translation yields 16 non-structural (nsp1-16) and 6 accessory proteins (p6, p7a, p8ab, p9b) with multiple functional domains. Viral proteins recruit over 300 host partners forming hetero-oligomeric complexes enabling the viral RNA synthesis, packing, and virion release. Many cellular host factors and the innate immune cells through pattern-recognition receptors and intracellular RNA sensor molecules act to inhibit virus entry and intracellular replication. However, non-structural ORF proteins hijack them and suppress interferon synthesis and its antiviral effects. Pro-inflammatory chemokines and cytokines storm leads to dysfunctional inflammation, lung injury, and several clinical symptoms in patients. During the global pandemic, COVID-19 patients were identified with non-synonymous substitution of G614D in the spike protein, indicating virus co-evolution in host cells. We review findings that suggest that host RNA editing and DNA repair systems, while carrying on recombination, mutation, and repair of viral RNA intermediates, may facilitate virus evolution. Understanding how the host cell RNA replication process may be driven by SARS-CoV-2 RNA genome fitness will help the testing of vaccines effectiveness to multiple independent mutated coronavirus strains that will emerge.
    MeSH term(s) COVID-19 ; COVID-19 Vaccines ; Humans ; Phylogeny ; RNA, Viral/genetics ; SARS-CoV-2
    Chemical Substances COVID-19 Vaccines ; RNA, Viral
    Language English
    Publishing date 2021-03-15
    Publishing country Brazil
    Document type Journal Article ; Review
    ZDB-ID 786234-9
    ISSN 1414-431X ; 0100-879X
    ISSN (online) 1414-431X
    ISSN 0100-879X
    DOI 10.1590/1414-431X202010725
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Immunity, virus evolution, and effectiveness of SARS-CoV-2 vaccines

    J.E. Belizário

    Brazilian Journal of Medical and Biological Research, Vol 54, Iss

    2021  Volume 5

    Abstract: Phylogenetic and pathogenesis studies of the severe acute respiratory syndrome-related coronaviruses (SARS-CoVs) strains have highlighted some specific mutations that could confer the RNA genome fitness advantages and immunological resistance for their ... ...

    Abstract Phylogenetic and pathogenesis studies of the severe acute respiratory syndrome-related coronaviruses (SARS-CoVs) strains have highlighted some specific mutations that could confer the RNA genome fitness advantages and immunological resistance for their rapid spread in the human population. The analyses of 30 kb RNA SARS-CoVs genome sequences, protein structures, and functions have provided us a perspective of how host-virus protein-protein complexes act to mediate virus infection. The open reading frame (ORF)1a and ORF1b translation yields 16 non-structural (nsp1-16) and 6 accessory proteins (p6, p7a, p8ab, p9b) with multiple functional domains. Viral proteins recruit over 300 host partners forming hetero-oligomeric complexes enabling the viral RNA synthesis, packing, and virion release. Many cellular host factors and the innate immune cells through pattern-recognition receptors and intracellular RNA sensor molecules act to inhibit virus entry and intracellular replication. However, non-structural ORF proteins hijack them and suppress interferon synthesis and its antiviral effects. Pro-inflammatory chemokines and cytokines storm leads to dysfunctional inflammation, lung injury, and several clinical symptoms in patients. During the global pandemic, COVID-19 patients were identified with non-synonymous substitution of G614D in the spike protein, indicating virus co-evolution in host cells. We review findings that suggest that host RNA editing and DNA repair systems, while carrying on recombination, mutation, and repair of viral RNA intermediates, may facilitate virus evolution. Understanding how the host cell RNA replication process may be driven by SARS-CoV-2 RNA genome fitness will help the testing of vaccines effectiveness to multiple independent mutated coronavirus strains that will emerge.
    Keywords SARS-CoV-2 ; COVID-19 ; Immunity ; Virus evolution ; Vaccines ; Medicine (General) ; R5-920 ; Biology (General) ; QH301-705.5
    Subject code 612
    Language English
    Publishing date 2021-03-01T00:00:00Z
    Publisher Associação Brasileira de Divulgação Científica
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Breath Biopsy and Discovery of Exclusive Volatile Organic Compounds for Diagnosis of Infectious Diseases.

    Belizário, José E / Faintuch, Joel / Malpartida, Miguel Garay

    Frontiers in cellular and infection microbiology

    2021  Volume 10, Page(s) 564194

    Abstract: Exhaled breath contains thousand metabolites and volatile organic compounds (VOCs) that originated from both respiratory tract and internal organ systems and their microbiomes. Commensal and pathogenic bacteria and virus of microbiomes are capable of ... ...

    Abstract Exhaled breath contains thousand metabolites and volatile organic compounds (VOCs) that originated from both respiratory tract and internal organ systems and their microbiomes. Commensal and pathogenic bacteria and virus of microbiomes are capable of producing VOCs of different chemical classes, and some of them may serve as biomarkers for installation and progression of various common human diseases. Here we describe qualitative and quantitative methods for measuring VOC fingerprints generated by cellular and microbial metabolic and pathologic pathways. We describe different chemical classes of VOCs and their role in the host cell-microbial interactions and their impact on infection disease pathology. We also update on recent progress on VOC signatures emitted by isolated bacterial species and microbiomes, and VOCs identified in exhaled breath of patients with respiratory tract and gastrointestinal diseases, and inflammatory syndromes, including the acute respiratory distress syndrome and sepsis. The VOC curated databases and instrumentations have been developed through statistically robust breathomic research in large patient populations. Scientists have now the opportunity to find potential biomarkers for both triage and diagnosis of particular human disease.
    MeSH term(s) Biomarkers ; Biopsy ; Breath Tests ; Communicable Diseases ; Humans ; Respiratory System ; Volatile Organic Compounds
    Chemical Substances Biomarkers ; Volatile Organic Compounds
    Language English
    Publishing date 2021-01-07
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 2619676-1
    ISSN 2235-2988 ; 2235-2988
    ISSN (online) 2235-2988
    ISSN 2235-2988
    DOI 10.3389/fcimb.2020.564194
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Microbiome and Gut Dysbiosis.

    Belizário, José E / Faintuch, Joel

    Experientia supplementum (2012)

    2018  Volume 109, Page(s) 459–476

    Abstract: The gastrointestinal (GI) tract is the residence of trillions of microorganisms that include bacteria, archaea, fungi and viruses. The collective genomes of whole microbial communities (microbiota) integrate the gut microbiome. Up to 100 genera and 1000 ... ...

    Abstract The gastrointestinal (GI) tract is the residence of trillions of microorganisms that include bacteria, archaea, fungi and viruses. The collective genomes of whole microbial communities (microbiota) integrate the gut microbiome. Up to 100 genera and 1000 distinct bacterial species were identified in digestive tube niches. Gut microbiomes exert permanent pivotal functions by promoting food digestion, xenobiotic metabolism and regulation of innate and adaptive immunological processes. Proteins, peptides and metabolites released locally and at distant sites trigger many cell signalling and pathways. This intense crosstalk maintains the host-microbial homeostasis. Diet, age, diet, stress and diseases cause increases or decreases in relative abundance and diversity bacterial specie of GI and other body sites. Studies in animal models and humans have shown that a persistent imbalance of gut's microbial community, named dysbiosis, relates to inflammatory bowel diseases (IBD), irritable bowel syndrome (IBS), diabetes, obesity, cancer, cardiovascular and central nervous system disorders. Notably specific bacterial communities are promising clinical target to treat inflammatory and infectious diseases. In this context, intestinal microbiota transplantation (IMT) is one optional treatment for IBD, in particular to patients with recurrent Clostridium difficile-induced pseudo-membrane colitis. Here we discuss on recent discoveries linking whole gut microbiome dysbiosis to metabolic and inflammatory diseases and potential prophylactic and therapeutic applications of faecal and phage therapy, probiotic and prebiotic diets.
    MeSH term(s) Animals ; Dysbiosis/microbiology ; Gastrointestinal Microbiome ; Humans ; Immune System ; Inflammation ; Intestines/microbiology
    Language English
    Publishing date 2018-12-07
    Publishing country Switzerland
    Document type Journal Article
    ISSN 1664-431X
    ISSN 1664-431X
    DOI 10.1007/978-3-319-74932-7_13
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Gut Microbiome Dysbiosis and Immunometabolism: New Frontiers for Treatment of Metabolic Diseases.

    Belizário, José E / Faintuch, Joel / Garay-Malpartida, Miguel

    Mediators of inflammation

    2018  Volume 2018, Page(s) 2037838

    Abstract: Maintenance of healthy human metabolism depends on a symbiotic consortium among bacteria, archaea, viruses, fungi, and host eukaryotic cells throughout the human gastrointestinal tract. Microbial communities provide the enzymatic machinery and the ... ...

    Abstract Maintenance of healthy human metabolism depends on a symbiotic consortium among bacteria, archaea, viruses, fungi, and host eukaryotic cells throughout the human gastrointestinal tract. Microbial communities provide the enzymatic machinery and the metabolic pathways that contribute to food digestion, xenobiotic metabolism, and production of a variety of bioactive molecules. These include vitamins, amino acids, short-chain fatty acids (SCFAs), and metabolites, which are essential for the interconnected pathways of glycolysis, the tricarboxylic acid/Krebs cycle, oxidative phosphorylation (OXPHOS), and amino acid and fatty acid metabolism. Recent studies have been elucidating how nutrients that fuel the metabolic processes impact on the ways immune cells, in particular, macrophages, respond to different stimuli under physiological and pathological conditions and become activated and acquire a specialized function. The two major inflammatory phenotypes of macrophages are controlled through differential consumption of glucose, glutamine, and oxygen. M1 phenotype is triggered by polarization signal from bacterial lipopolysaccharide (LPS) and Th1 proinflammatory cytokines such as interferon-
    MeSH term(s) Animals ; Dysbiosis/metabolism ; Dysbiosis/microbiology ; Gastrointestinal Microbiome/physiology ; Humans ; Macrophages/metabolism ; Metabolic Diseases/metabolism ; Metabolic Diseases/microbiology
    Language English
    Publishing date 2018-12-09
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 1137605-3
    ISSN 1466-1861 ; 0962-9351
    ISSN (online) 1466-1861
    ISSN 0962-9351
    DOI 10.1155/2018/2037838
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Effect of irrigation acid solutions on cleaning and bond strength to post-space dentin.

    Alencar, C de Melo / Zaniboni, J Ferrari / Besegato, J Felipe / Barros, A Patricia Oliveira / Gélio, M Bena / Belizário, L Garcia / Godoy, E Maximiliano Fernandez / Kuga, M Carlos

    European journal of oral sciences

    2023  Volume 131, Issue 4, Page(s) e12939

    Abstract: This study evaluated the effects of irrigating solutions containing 5% boric acid + 1% citric acid or 1% peracetic acid + high concentration hydrogen peroxide on root cleaning and bond strength of cementation systems after 24 h and 6 months of glass ... ...

    Abstract This study evaluated the effects of irrigating solutions containing 5% boric acid + 1% citric acid or 1% peracetic acid + high concentration hydrogen peroxide on root cleaning and bond strength of cementation systems after 24 h and 6 months of glass fiber post cementation. One hundred and twenty roots were endodontically treated. The specimens were randomized into one of four treatments (n = 10): DW (distilled water); NaOCl
    MeSH term(s) Dental Bonding ; Dental Pulp Cavity ; Dentin ; Edetic Acid ; Hydrogen Peroxide ; Materials Testing ; Peracetic Acid ; Post and Core Technique ; Resin Cements/chemistry ; Humans
    Chemical Substances boric acid (R57ZHV85D4) ; Edetic Acid (9G34HU7RV0) ; Hydrogen Peroxide (BBX060AN9V) ; Peracetic Acid (I6KPI2E1HD) ; Resin Cements
    Language English
    Publishing date 2023-06-09
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1224820-4
    ISSN 1600-0722 ; 0909-8836
    ISSN (online) 1600-0722
    ISSN 0909-8836
    DOI 10.1111/eos.12939
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Uniformity of water distribution in sprinkler irrigation mini-cannons in a high Andean community in Peru

    Clavitea Abigael / Mamani J.A. / Huaquisto E. / Alfaro-Alejo Roberto / Belizario G.

    E3S Web of Conferences, Vol 434, p

    2023  Volume 03028

    Abstract: The objective of the present work was to determine the uniformity of water distribution through mini-irrigation cannons in conditions of the Peruvian altiplano, applying the formulas for the Christiansen Uniformity Coefficient (CUC) and the Distribution ... ...

    Abstract The objective of the present work was to determine the uniformity of water distribution through mini-irrigation cannons in conditions of the Peruvian altiplano, applying the formulas for the Christiansen Uniformity Coefficient (CUC) and the Distribution Coefficient (DU) and to interpret the incidence of wind on water distribution at three different times during the day (5:30-7:30, 12-14 and 16-18 hours). Necessary climatological information, field rainfall tests, emitter pressure, and flow, wind speed were collected to evaluate their influence on water application. Variable CUC and distribution uniformity results were obtained at the level of four demonstration plots, the maximum and minimum CUC was 87.42% and 55.34%, while the DU resulted with a maximum of 80.79% and 26. 88% minimum; it is worth mentioning that in the last two schedules, results were obtained that show a poor water distribution; while winds less than 2 m/s favored the uniform distribution of water applied through the sprinklers, affirming that it was possible to obtain an acceptable water distribution uniformity at the plot level considering the irrigation schedule.
    Keywords Environmental sciences ; GE1-350
    Language English
    Publishing date 2023-01-01T00:00:00Z
    Publisher EDP Sciences
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article ; Online: Modulation of procaspase-7 self-activation by PEST amino acid residues of the N-terminal prodomain and intersubunit linker.

    Alves, Juliano / Garay-Malpartida, Miguel / Occhiucci, João M / Belizário, José E

    Biochemistry and cell biology = Biochimie et biologie cellulaire

    2017  , Page(s) 1–10

    Abstract: Procaspase-7 zymogen polypeptide is composed of a short prodomain, a large subunit (p20), and a small subunit (p10) connected to an intersubunit linker. Caspase-7 is activated by an initiator caspase-8 and -9, or by autocatalysis after specific cleavage ... ...

    Abstract Procaspase-7 zymogen polypeptide is composed of a short prodomain, a large subunit (p20), and a small subunit (p10) connected to an intersubunit linker. Caspase-7 is activated by an initiator caspase-8 and -9, or by autocatalysis after specific cleavage at IQAD
    Language English
    Publishing date 2017-06-28
    Publishing country Canada
    Document type Journal Article
    ZDB-ID 54104-7
    ISSN 1208-6002 ; 0829-8211
    ISSN (online) 1208-6002
    ISSN 0829-8211
    DOI 10.1139/bcb-2016-0220
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Clinical presentation and in-hospital prognosis of lung cancer patients presenting with suspected and confirmed COVID-19.

    Peixoto, D / Callia, J P B / Bittencourt, M S / Generoso, G / Anastácio, V M / Alves-Jr, J L / Silva, T L da / Belizário, J C / Araújo, B L M / Ho, W / Diz, M D P E / Hoff, P M / Abdala, E / Ibrahim, K Y

    Brazilian journal of medical and biological research = Revista brasileira de pesquisas medicas e biologicas

    2022  Volume 55, Page(s) e12140

    Abstract: We sought to compare the clinical presentation and prognosis of patients with lung cancer and confirmed COVID-19 infection to those with negative RT-PCR SARS-CoV-2 results. We included patients with confirmed lung cancer and suspected COVID-19 who ... ...

    Abstract We sought to compare the clinical presentation and prognosis of patients with lung cancer and confirmed COVID-19 infection to those with negative RT-PCR SARS-CoV-2 results. We included patients with confirmed lung cancer and suspected COVID-19 who presented to the emergency department. The primary outcome was in-hospital mortality and secondary outcomes included admission to intensive care unit (ICU) or mechanical ventilation. We analyzed the characteristics according to RT-PCR results and primary outcome. We constructed a logistic regression for each RT-PCR result group to find potential predictors of the primary outcome. Among 110 individuals with confirmed lung cancer (65±9 years, 51% male), 38 patients had positive RT-PCR and 72 patients had negative RT-PCR. There was no difference between groups for any clinical characteristic or comorbidities though individuals with confirmed COVID-19 had higher functionality in the ECOG scale. Leucocytes and lymphocytes were lower in individuals with positive tests. The primary outcome occurred in 58 (53%) individuals, 37 (34%) were admitted to the ICU, and 29 (26%) required mechanical ventilation. Although mortality was similar between the two groups, individuals with confirmed COVID-19 were significantly more likely to be admitted to the ICU or receive mechanical ventilation. Only lower lymphocytes and higher CRP were significantly associated with higher mortality. The clinical presentation of COVID-19 in lung cancer is not sufficient to identify higher or lower probability groups among symptomatic individuals, the overall mortality is high irrespective of RT-PCR results, and lymphopenia on admission was associated with the diagnosis and prognosis for COVID-19.
    MeSH term(s) COVID-19/diagnosis ; Female ; Hospital Mortality ; Hospitals ; Humans ; Lung Neoplasms/diagnosis ; Male ; SARS-CoV-2
    Language English
    Publishing date 2022-09-12
    Publishing country Brazil
    Document type Journal Article
    ZDB-ID 786234-9
    ISSN 1414-431X ; 0100-879X
    ISSN (online) 1414-431X
    ISSN 0100-879X
    DOI 10.1590/1414-431X2022e12140
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Effect of Different Irrigants on the Adhesive Interface and Influence on the Push Out Strength of Fiber Posts.

    Belizario, L G / Piragine, T L / Girotto, A C / Gelio, M B / Pereira, J R / Fernandez, E / Kuga, M C

    Operative dentistry

    2022  Volume 47, Issue 5, Page(s) E211–E221

    Abstract: Purpose: The aim of this study was to evaluate the effects of a new irrigant solution on the post space cleaning and the adhesive resistance of fiber posts.: Methods and materials: Eighty roots of bovine teeth were randomly allocated into eight ... ...

    Abstract Purpose: The aim of this study was to evaluate the effects of a new irrigant solution on the post space cleaning and the adhesive resistance of fiber posts.
    Methods and materials: Eighty roots of bovine teeth were randomly allocated into eight groups (n=10 for each group). Evaluations were performed in two different time points for each irrigant. The irrigants included a control group with distilled water (DW), 2.5% NaOCl and 17% EDTA (SH), 1% peracetic acid (PA), and 5% boric acid and 1% citric acid (EX). The time points were 24 hours (I-immediate) and 6 months (D-delayed). The push-out test was performed using a universal testing machine with a 5 kN load cell operating at a crosshead speed of 0.5 mm/minute. The dentinal cementation system was analyzed using a laser confocal microscope (LSM5, Zeiss, Jena, Germany), and incidence of residue on radicular dentin was evaluated by scanning electron microscopy (SEM). The incidence of residue was evaluated by the Kruskal-Wallis test and push-out bond strength and dentin penetrability were evaluated via a one-way analysis of variance (ANOVA) and Tukey tests (α=0.05).
    Results: The EX irrigation protocol demonstrated the lowest incidence of residue on the dentin surface (p<0.05), independently of the evaluated third. In the cervical and the middle post thirds, EXI, EXD, SHI, and SHD groups exhibited similar push-out bond strength values (p>0.05). EXI, EXD, PAI, and PAD exhibited the greatest dentinal penetrability of the cementation system in all the post thirds (p<0.05).
    Conclusions: A solution containing 5% boric acid and 1% citric acid can be a promising irrigant for radicular post space cleaning. It has adequate potential for cleaning the dentin surface without interfering with the adhesive interface between the dentin and the cementation system.
    MeSH term(s) Animals ; Boric Acids ; Cattle ; Citric Acid/analysis ; Citric Acid/pharmacology ; Dental Bonding/methods ; Dental Cements/therapeutic use ; Dental Pulp Cavity ; Dentin ; Disulfides ; Edetic Acid/chemistry ; Materials Testing ; Peracetic Acid/analysis ; Peracetic Acid/pharmacology ; Post and Core Technique ; Resin Cements/chemistry ; Resin Cements/therapeutic use ; Root Canal Irrigants/analysis ; Root Canal Irrigants/chemistry ; Root Canal Irrigants/therapeutic use ; Thiones ; Water
    Chemical Substances Boric Acids ; Dental Cements ; Disulfides ; Resin Cements ; Root Canal Irrigants ; Thiones ; Water (059QF0KO0R) ; Citric Acid (2968PHW8QP) ; Edetic Acid (9G34HU7RV0) ; Peracetic Acid (I6KPI2E1HD) ; boric acid (R57ZHV85D4) ; dixanthogen (RN4CQ46FDM)
    Language English
    Publishing date 2022-09-19
    Publishing country United States
    Document type Journal Article
    ZDB-ID 752995-8
    ISSN 1559-2863 ; 0361-7734
    ISSN (online) 1559-2863
    ISSN 0361-7734
    DOI 10.2341/21-038-L
    Database MEDical Literature Analysis and Retrieval System OnLINE

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