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  1. Article ; Online: THE EVOLVING FIELD OF HEPATOLOGY IN BRAZIL.

    Bittencourt, Paulo Lisboa

    Arquivos de gastroenterologia

    2022  Volume 59, Issue 3, Page(s) 325–326

    MeSH term(s) Brazil ; Gastroenterology ; Humans
    Language English
    Publishing date 2022-09-14
    Publishing country Brazil
    Document type Editorial
    ZDB-ID 137743-7
    ISSN 1678-4219 ; 0004-2803
    ISSN (online) 1678-4219
    ISSN 0004-2803
    DOI 10.1590/S0004-2803.202203000-59
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Biodegradable starch / polyvinyl alcohol composites produced by thermoplastic injection containing cellulose extracted from soybean hulls (Glycine max L.)

    Bortolatto, Rubiane / Bittencourt, Paulo Rodrigo Stival / Yamashita, Fabio

    Industrial crops and products. 2022 Feb., v. 176

    2022  

    Abstract: Soybean hull is an agro-industrial residue of extensive generation in the soybean oil-producing industry, where approximately 5% of the processed volume of soy beans is converted into hulls. The main use for soy hulls is animal feed, being of great ... ...

    Abstract Soybean hull is an agro-industrial residue of extensive generation in the soybean oil-producing industry, where approximately 5% of the processed volume of soy beans is converted into hulls. The main use for soy hulls is animal feed, being of great importance to find more ways of consumption for the hulls. This research proposed a noble application for soy hulls: using the hulls as a source for extracting cellulose fibers. Cellulose fibers were extracted from the hulls by alkaline treatment, ground (< 600 µm) and added to thermoplastic starch (TPS). Polyvinyl alcohol (PVA) was also added to the materials produced in order to promote better compatibility between the components. Ten formulations were produced, containing between 4 and 19 wt% of cellulose, and 2 controls. Half of the formulations contained 6 wt% PVA. Cellulose fibers and soybean hulls were characterized by FTIR-ATR and SEM, and the analyzes showed partial purification of the cellulose fibers, with a purity of 92 wt%. The composites were produced by extrusion followed by injection, and characterized by stress-strain, FTIR-ATR and dimensional stability after injection (shrinkage and warpage) tests. Cellulose fibers did not increase the tensile strength (TS) of the composites, but reduced the deformation capacity by 62% (to 19% of fibers) compared to the control. Cellulose fibers together with PVA increased the TS by up to 22% (to 19% fibers and 6% PVA in the composition), making the material more mechanically resistant. For this same formulation, the deformation capacity was reduced by a maximum of 75%, and the modulus of elasticity was increased by a maximum of 230% (the composite became more resistant and rigid). Cellulose fibers reduced the shrinkage value of the specimens, reducing the shrinkage value to less than 1% for the formulations containing 19% cellulose fibers. The cellulose fibers associated with 6% PVA had a synergistic action in the shrinkage of the specimens, further reducing the shrinkage in length (0.4% length shrinkage for 15% cellulose fibers; 0.1% length shrinkage for 19% cellulose fibers). The addition of cellulose fibers and 6% PVA to TPS made the composites more rigid and mechanically reinforced, and also with greater dimensional stability after injection.
    Keywords Glycine max ; alkali treatment ; biodegradability ; cellulose ; deformation ; dimensional stability ; extrusion ; feeds ; industry ; modulus of elasticity ; polyvinyl alcohol ; shrinkage ; soybean hulls ; soybeans ; starch ; synergism ; tensile strength ; thermoplastics
    Language English
    Dates of publication 2022-02
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 1132158-1
    ISSN 1872-633X ; 0926-6690
    ISSN (online) 1872-633X
    ISSN 0926-6690
    DOI 10.1016/j.indcrop.2021.114383
    Database NAL-Catalogue (AGRICOLA)

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  3. Article: Acute-on-Chronic Liver Failure: Which Definition Is Appropriate in Latin America?

    Farias, Alberto Queiroz / Bittencourt, Paulo Lisboa

    Clinical liver disease

    2020  Volume 16, Issue 3, Page(s) 114–116

    Abstract: Watch a video presentation of this article. ...

    Abstract Watch a video presentation of this article.
    Language English
    Publishing date 2020-09-22
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 2657644-2
    ISSN 2046-2484
    ISSN 2046-2484
    DOI 10.1002/cld.945
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Internet search engines and social media are improving awareness on non-alcoholic fatty liver disease in Brazil.

    Bittencourt, Paulo Lisboa / Oliveira, Claudia P / Codes, Liana / Ferraz, Maria Lucia Gomes

    Journal of hepatology

    2022  Volume 77, Issue 4, Page(s) 1217–1219

    MeSH term(s) Brazil/epidemiology ; Humans ; Internet ; Non-alcoholic Fatty Liver Disease/diagnosis ; Non-alcoholic Fatty Liver Disease/epidemiology ; Search Engine ; Social Media
    Language English
    Publishing date 2022-07-08
    Publishing country Netherlands
    Document type Letter ; Comment
    ZDB-ID 605953-3
    ISSN 1600-0641 ; 0168-8278
    ISSN (online) 1600-0641
    ISSN 0168-8278
    DOI 10.1016/j.jhep.2022.06.020
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Resolution of inflammation in chronic disease via restoration of the heat shock response (HSR).

    Schroeder, Helena Trevisan / De Lemos Muller, Carlos Henrique / Heck, Thiago Gomes / Krause, Mauricio / Homem de Bittencourt, Paulo Ivo

    Cell stress & chaperones

    2024  Volume 29, Issue 1, Page(s) 66–87

    Abstract: Effective resolution of inflammation via the heat shock response (HSR) is pivotal in averting the transition to chronic inflammatory states. This transition characterizes a spectrum of debilitating conditions, including insulin resistance, obesity, type ... ...

    Abstract Effective resolution of inflammation via the heat shock response (HSR) is pivotal in averting the transition to chronic inflammatory states. This transition characterizes a spectrum of debilitating conditions, including insulin resistance, obesity, type 2 diabetes, nonalcoholic fatty liver disease, and cardiovascular ailments. This manuscript explores a range of physiological, pharmacological, and nutraceutical interventions aimed at reinstating the HSR in the context of chronic low-grade inflammation, as well as protocols to assess the HSR. Monitoring the progression or suppression of the HSR in patients and laboratory animals offers predictive insights into the organism's capacity to combat chronic inflammation, as well as the impact of exercise and hyperthermic treatments (e.g., sauna or hot tub baths) on the HSR. Interestingly, a reciprocal correlation exists between the expression of HSR components in peripheral blood leukocytes (PBL) and the extent of local tissue proinflammatory activity in individuals afflicted by chronic inflammatory disorders. Therefore, the Heck index, contrasting extracellular 70 kDa family of heat shock proteins (HSP70) (proinflammatory) and intracellular HSP70 (anti-inflammatory) in PBL, serves as a valuable metric for HSR assessment. Our laboratory has also developed straightforward protocols for evaluating HSR by subjecting whole blood samples from both rodents and human volunteers to ex vivo heat challenges. Collectively, this discussion underscores the critical role of HSR disruption in the pathogenesis of chronic inflammatory states and emphasizes the significance of simple, cost-effective tools for clinical HSR assessment. This understanding is instrumental in the development of innovative strategies for preventing and managing chronic inflammatory diseases, which continue to exert a substantial global burden on morbidity and mortality.
    MeSH term(s) Animals ; Humans ; Diabetes Mellitus, Type 2 ; Heat-Shock Response ; Heat-Shock Proteins/metabolism ; HSP70 Heat-Shock Proteins/metabolism ; Inflammation ; Chronic Disease
    Chemical Substances Heat-Shock Proteins ; HSP70 Heat-Shock Proteins
    Language English
    Publishing date 2024-02-01
    Publishing country Netherlands
    Document type Journal Article ; Review
    ZDB-ID 1362749-1
    ISSN 1466-1268 ; 1355-8145
    ISSN (online) 1466-1268
    ISSN 1355-8145
    DOI 10.1016/j.cstres.2024.01.005
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: The dance of proteostasis and metabolism: Unveiling the caloristatic controlling switch.

    Schroeder, Helena Trevisan / De Lemos Muller, Carlos Henrique / Heck, Thiago Gomes / Krause, Mauricio / Homem de Bittencourt, Paulo Ivo

    Cell stress & chaperones

    2024  Volume 29, Issue 1, Page(s) 175–200

    Abstract: The heat shock response (HSR) is an ancient and evolutionarily conserved mechanism designed to restore cellular homeostasis following proteotoxic challenges. However, it has become increasingly evident that disruptions in energy metabolism also trigger ... ...

    Abstract The heat shock response (HSR) is an ancient and evolutionarily conserved mechanism designed to restore cellular homeostasis following proteotoxic challenges. However, it has become increasingly evident that disruptions in energy metabolism also trigger the HSR. This interplay between proteostasis and energy regulation is rooted in the fundamental need for ATP to fuel protein synthesis and repair, making the HSR an essential component of cellular energy management. Recent findings suggest that the origins of proteostasis-defending systems can be traced back over 3.6 billion years, aligning with the emergence of sugar kinases that optimized glycolysis around 3.594 billion years ago. This evolutionary connection is underscored by the spatial similarities between the nucleotide-binding domain of HSP70, the key player in protein chaperone machinery, and hexokinases. The HSR serves as a hub that integrates energy metabolism and resolution of inflammation, further highlighting its role in maintaining cellular homeostasis. Notably, 5'-adenosine monophosphate-activated protein kinase emerges as a central regulator, promoting the HSR during predominantly proteotoxic stress while suppressing it in response to predominantly metabolic stress. The complex relationship between 5'-adenosine monophosphate-activated protein kinase and the HSR is finely tuned, with paradoxical effects observed under different stress conditions. This delicate equilibrium, known as caloristasis, ensures that cellular homeostasis is maintained despite shifting environmental and intracellular conditions. Understanding the caloristatic controlling switch at the heart of this interplay is crucial. It offers insights into a wide range of conditions, including glycemic control, obesity, type 2 diabetes, cardiovascular and neurodegenerative diseases, reproductive abnormalities, and the optimization of exercise routines. These findings highlight the profound interconnectedness of proteostasis and energy metabolism in cellular function and adaptation.
    MeSH term(s) Humans ; Proteostasis ; Diabetes Mellitus, Type 2 ; HSP70 Heat-Shock Proteins/metabolism ; Heat-Shock Response ; Adenosine Monophosphate/metabolism ; Protein Kinases/metabolism
    Chemical Substances HSP70 Heat-Shock Proteins ; Adenosine Monophosphate (415SHH325A) ; Protein Kinases (EC 2.7.-)
    Language English
    Publishing date 2024-02-06
    Publishing country Netherlands
    Document type Journal Article ; Review
    ZDB-ID 1362749-1
    ISSN 1466-1268 ; 1355-8145
    ISSN (online) 1466-1268
    ISSN 1355-8145
    DOI 10.1016/j.cstres.2024.02.002
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Heat shock response during the resolution of inflammation and its progressive suppression in chronic-degenerative inflammatory diseases.

    Schroeder, Helena Trevisan / De Lemos Muller, Carlos Henrique / Heck, Thiago Gomes / Krause, Mauricio / Homem de Bittencourt, Paulo Ivo

    Cell stress & chaperones

    2024  Volume 29, Issue 1, Page(s) 116–142

    Abstract: The heat shock response (HSR) is a crucial biochemical pathway that orchestrates the resolution of inflammation, primarily under proteotoxic stress conditions. This process hinges on the upregulation of heat shock proteins (HSPs) and other chaperones, ... ...

    Abstract The heat shock response (HSR) is a crucial biochemical pathway that orchestrates the resolution of inflammation, primarily under proteotoxic stress conditions. This process hinges on the upregulation of heat shock proteins (HSPs) and other chaperones, notably the 70 kDa family of heat shock proteins, under the command of the heat shock transcription factor-1. However, in the context of chronic degenerative disorders characterized by persistent low-grade inflammation (such as insulin resistance, obesity, type 2 diabetes, nonalcoholic fatty liver disease, and cardiovascular diseases) a gradual suppression of the HSR does occur. This work delves into the mechanisms behind this phenomenon. It explores how the Western diet and sedentary lifestyle, culminating in the endoplasmic reticulum stress within adipose tissue cells, trigger a cascade of events. This cascade includes the unfolded protein response and activation of the NOD-like receptor pyrin domain-containing protein-3 inflammasome, leading to the emergence of the senescence-associated secretory phenotype and the propagation of inflammation throughout the body. Notably, the activation of the NOD-like receptor pyrin domain-containing protein-3 inflammasome not only fuels inflammation but also sabotages the HSR by degrading human antigen R, a crucial mRNA-binding protein responsible for maintaining heat shock transcription factor-1 mRNA expression and stability on heat shock gene promoters. This paper underscores the imperative need to comprehend how chronic inflammation stifles the HSR and the clinical significance of evaluating the HSR using cost-effective and accessible tools. Such understanding is pivotal in the development of innovative strategies aimed at the prevention and treatment of these chronic inflammatory ailments, which continue to take a heavy toll on global health and well-being.
    MeSH term(s) Humans ; Heat Shock Transcription Factors ; Diabetes Mellitus, Type 2 ; Inflammasomes/metabolism ; Inflammasomes/pharmacology ; Heat-Shock Response ; Heat-Shock Proteins/metabolism ; Inflammation ; RNA, Messenger ; NLR Proteins/metabolism ; HSP70 Heat-Shock Proteins/metabolism
    Chemical Substances Heat Shock Transcription Factors ; Inflammasomes ; Heat-Shock Proteins ; RNA, Messenger ; NLR Proteins ; HSP70 Heat-Shock Proteins
    Language English
    Publishing date 2024-01-19
    Publishing country Netherlands
    Document type Journal Article ; Review
    ZDB-ID 1362749-1
    ISSN 1466-1268 ; 1355-8145
    ISSN (online) 1466-1268
    ISSN 1355-8145
    DOI 10.1016/j.cstres.2024.01.002
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Influence of Tacrolimus Intrapatient Variability on Allograft Rejection Frequency and Survival Following Liver Transplantation.

    Soares, Maria Eduarda / Costa, Gabriela / Guerra, Laura / Morais, Maria Clara / Vaz, Nayana / Codes, Liana / Bittencourt, Paulo Lisboa

    Therapeutic drug monitoring

    2024  

    Abstract: Background: Tacrolimus is the primary calcineurin inhibitor used in immunosuppressive regimens to prevent allograft rejection (AR) after organ transplantation. Recent studies have linked intrapatient variability (IPV) of tacrolimus with AR occurrence ... ...

    Abstract Background: Tacrolimus is the primary calcineurin inhibitor used in immunosuppressive regimens to prevent allograft rejection (AR) after organ transplantation. Recent studies have linked intrapatient variability (IPV) of tacrolimus with AR occurrence and reduced survival, especially in kidney transplant recipients. However, limited data are available on the impact of tacrolimus IPV on adverse outcomes after liver transplantation (LT).
    Aims: The aim of this study was to assess the association between tacrolimus IPV using various methodologies with acute AR and long-term patient survival after LT.
    Methods: All patients who underwent LT from January 2010 to July 2021 were retrospectively evaluated. Tacrolimus IPV was calculated for each patient using the mean and SD, mean absolute deviation (MAD), coefficient of variation (CV), and time in therapeutic range (TTR). These measures were then compared with AR within the first 24 months after LT and to long-term survival.
    Results: Out of 234 patients, 32 (13.7%) developed AR and 183 (78.2%) survived, with a mean follow-up of 101 ± 43 months. Tacrolimus IPV, assessed by mean, SD, MAD, and CV, was 8.3 ± 2.1, 2.7 ± 1.3, 32.0% ± 11.7%, and 39.4% ± 15.4%, respectively. There was no statistically significant correlation between Tacrolimus IPV and AR or survival post-LT.
    Conclusions: In a large cohort of patients from diverse racial backgrounds, tacrolimus IPV was not associated with clinically relevant outcomes such as AR and survival after LT.
    Language English
    Publishing date 2024-03-29
    Publishing country United States
    Document type Journal Article
    ZDB-ID 424443-6
    ISSN 1536-3694 ; 0163-4356
    ISSN (online) 1536-3694
    ISSN 0163-4356
    DOI 10.1097/FTD.0000000000001192
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Public knowledge and attitudes toward liver diseases and liver cancer in the Brazilian population: a cross sectional study.

    Bittencourt, Paulo Lisboa / Codes, Liana / Cesar, Heloisa Furia / Gomes Ferraz, Maria Lucia

    Lancet regional health. Americas

    2023  Volume 23, Page(s) 100531

    Abstract: Background: Little is known about the knowledge of the Brazilian population regarding prevention/screening/diagnosis of cirrhosis and hepatocellular carcinoma (HCC). We aimed to investigate the public knowledge/attitudes toward liver diseases in Brazil.! ...

    Abstract Background: Little is known about the knowledge of the Brazilian population regarding prevention/screening/diagnosis of cirrhosis and hepatocellular carcinoma (HCC). We aimed to investigate the public knowledge/attitudes toward liver diseases in Brazil.
    Methods: A cross-sectional survey was conducted in which 1.995 adults were prospectively interviewed regarding knowledge about cirrhosis/HCC and attitudes toward vaccination and viral hepatitis (VH) testing.
    Findings: Most of the Brazilian subjects believe that alcohol abuse (63%-87%), NAFLD (29%-53%) and smoking (31%-47%) are the leading causes of cirrhosis/HCC. VH were less often linked to both diseases. Brazilians agreed that NAFLD is a risk factor for cirrhosis, cancer and cardiovascular diseases; 66%, 48% and 40% were submitted to hepatitis B vaccination and hepatitis B and C testing, particularly those with older age, higher level of education and income.
    Interpretation: VH was not considered by the majority of the Brazilians as an important cause liver disease, leading a large proportion of those subjects to neglect hepatitis B vaccination and hepatitis B and C testing.
    Funding: This work was supported by Brazilian Liver Institute.
    Language English
    Publishing date 2023-06-08
    Publishing country England
    Document type Journal Article
    ISSN 2667-193X
    ISSN (online) 2667-193X
    DOI 10.1016/j.lana.2023.100531
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Telemonitoring of the Continuum of Care of Hepatitis C During the COVID-19 Pandemic in Brazil.

    Bittencourt, Paulo Lisboa / Codes, Liana / César, Alessandra Maria Dias Guimarães / Mussi, Fernanda Carneiro / Ferraz, Maria Lúcia Gomes

    Telemedicine journal and e-health : the official journal of the American Telemedicine Association

    2023  Volume 29, Issue 11, Page(s) 1673–1678

    Abstract: Introduction: ...

    Abstract Introduction:
    MeSH term(s) Humans ; Hepacivirus ; Brazil/epidemiology ; Pandemics ; Antiviral Agents/therapeutic use ; COVID-19/epidemiology ; SARS-CoV-2 ; Hepatitis C/drug therapy ; Hepatitis C/epidemiology ; Continuity of Patient Care
    Chemical Substances Antiviral Agents
    Language English
    Publishing date 2023-03-09
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2035659-6
    ISSN 1556-3669 ; 1530-5627
    ISSN (online) 1556-3669
    ISSN 1530-5627
    DOI 10.1089/tmj.2022.0306
    Database MEDical Literature Analysis and Retrieval System OnLINE

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