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1.
World J Clin Oncol ; 15(4): 496-522, 2024 Apr 24.
Artigo em Inglês | MEDLINE | ID: mdl-38689629

RESUMO

Endometriosis is an estrogen-dependent inflammatory disease, defined by the presence of functional endometrial tissue outside of the uterine cavity. This disease is one of the main gynecological diseases, affecting around 10%-15% women and girls of reproductive age, being a common gynecologic disorder. Although endometriosis is a benign disease, it shares several characteristics with invasive cancer. Studies support that it has been linked with an increased chance of developing endometrial ovarian cancer, representing an earlier stage of neoplastic processes. This is particularly true for women with clear cell carcinoma, low-grade serous carcinoma and endometrioid. However, the carcinogenic pathways between both pathologies remain poorly understood. Current studies suggest a connection between endometriosis and endometriosis-associated ovarian cancers (EAOCs) via pathways associated with oxidative stress, inflammation, and hyperestrogenism. This article aims to review current data on the molecular events linked to the development of EAOCs from endometriosis, specifically focusing on the complex relationship between the immune response to endometriosis and cancer, including the molecular mechanisms and their ramifications. Examining recent developments in immunotherapy and their potential to boost the effectiveness of future treatments.

2.
World J Gastroenterol ; 30(6): 579-598, 2024 Feb 14.
Artigo em Inglês | MEDLINE | ID: mdl-38463019

RESUMO

BACKGROUND: Helicobacter pylori (H. pylori) infection has been well-established as a significant risk factor for several gastrointestinal disorders. The urea breath test (UBT) has emerged as a leading non-invasive method for detecting H. pylori. Despite numerous studies confirming its substantial accuracy, the reliability of UBT results is often compromised by inherent limitations. These findings underscore the need for a rigorous statistical synthesis to clarify and reconcile the diagnostic accuracy of the UBT for the diagnosis of H. pylori infection. AIM: To determine and compare the diagnostic accuracy of 13C-UBT and 14C-UBT for H. pylori infection in adult patients with dyspepsia. METHODS: We conducted an independent search of the PubMed/MEDLINE, EMBASE, and Cochrane Central databases until April 2022. Our search included diagnostic accuracy studies that evaluated at least one of the index tests (13C-UBT or 14C-UBT) against a reference standard. We used the QUADAS-2 tool to assess the methodological quality of the studies. We utilized the bivariate random-effects model to calculate sensitivity, specificity, positive and negative test likelihood ratios (LR+ and LR-), as well as the diagnostic odds ratio (DOR), and their 95% confidence intervals. We conducted subgroup analyses based on urea dosing, time after urea administration, and assessment technique. To investigate a possible threshold effect, we conducted Spearman correlation analysis, and we generated summary receiver operating characteristic (SROC) curves to assess heterogeneity. Finally, we visually inspected a funnel plot and used Egger's test to evaluate publication bias. RESULTS: The titles and abstracts of 4621 studies were screened; 79 articles were retrieved and selected for full-text reading. Finally, 60 studies were included in the diagnostic test accuracy meta-analysis. Our analysis demonstrates superior diagnostic accuracy of 13C-UBT over 14C-UBT, indicated by higher sensitivity (96.60% vs 96.15%), specificity (96.93% vs 89.84%), likelihood ratios (LR+ 22.00 vs 10.10; LR- 0.05 vs 0.06), and area under the curve (AUC; 0.979 vs 0.968). Notably, 13C-UBT's DOR (586.47) significantly outperforms 14C-UBT (DOR 226.50), making it the preferred diagnostic tool for dyspeptic individuals with H. pylori infection. Correlation analysis revealed no threshold effect (13C-UBT: r = 0.48; 14C-UBT: r = -0.01), and SROC curves showed consistent accuracy. Both 13C-UBT and 14C-UBT showed high AUC values (13C-UBT 0.979; 14C-UBT 0.968) near 1.00, reinforcing their excellent accuracy and endorsing both as reliable diagnostic tools in clinical practice. CONCLUSION: In summary, our study has demonstrated that 13C-UBT has been found to outperform the 14C-UBT, making it the preferred diagnostic approach. Additionally, our results emphasize the significance of carefully considering urea dosage, assessment timing, and measurement techniques for both tests to enhance diagnostic precision. Nevertheless, it is crucial for researchers and clinicians to evaluate the strengths and limitations of our findings before implementing them in practice.


Assuntos
Infecções por Helicobacter , Helicobacter pylori , Adulto , Humanos , Infecções por Helicobacter/diagnóstico , Ureia , Reprodutibilidade dos Testes , Sensibilidade e Especificidade , Testes Respiratórios/métodos , Testes Diagnósticos de Rotina
3.
Anal Methods ; 15(47): 6541-6550, 2023 12 07.
Artigo em Inglês | MEDLINE | ID: mdl-37990986

RESUMO

This work describes the development of a membraneless, self-powered immunosensor exploiting a photoelectrochemical system based on two photoelectrodes for cardiac troponin I (cTn). An electrode based on CaBi2Ta2O9 combined with bismuth oxyiodides (BiOI/Bi4O5I2/Bi5O7I) was modified with the cTnI antibody (anti-cTnI) and applied in a photoelectrochemical cell as a photoanode. To perform the cTnI detection exploiting a self-powered photoelectrochemical setup, the immunosensor (anti-cTnI/BiOI/Bi4O5I2/Bi5O7I/CaBi2Ta2O9/FTO) was coupled to a photoelectrochemical cell containing a photocathode based on CuBi2O4 (CBO/FTO) for zero-biased photoelectrochemical immunosensing of cardiac troponin I (cTnI) biomarker. For comparison purposes, the photoanode was applied for cTnI detection in a three-electrode electrochemical cell. The spectroscopic, structural, and morphological characteristics of the photoelectrochemical (PEC) materials were evaluated using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD). Electrochemical impedance spectroscopy (EIS) measurements were performed in the presence and absence of light to investigate the effects of photons on the charge transfer resistance of the photoanode. The influence of the cTnI biomarker on the photoelectrochemical response of the anti-cTnI antibody-modified photoelectrochemical platform (anti-cTnI/BiOI/Bi4O5I2/Bi5O7I/CaBi2Ta2O9/FTO) was evaluated by measuring the photocurrent of the system. The immunosensor presented a linear response ranging from 1 pg mL-1 to 200 ng mL-1 as well as a mean recovery percentage between 95.7% and 108.0% in real human serum samples for the cTnI biomarker.


Assuntos
Técnicas Biossensoriais , Técnicas Eletroquímicas , Humanos , Técnicas Eletroquímicas/métodos , Imunoensaio/métodos , Bismuto/química , Técnicas Biossensoriais/métodos , Troponina I , Biomarcadores , Dioxigenase FTO Dependente de alfa-Cetoglutarato
4.
World J Gastroenterol ; 29(32): 4851-4859, 2023 Aug 28.
Artigo em Inglês | MEDLINE | ID: mdl-37701138

RESUMO

Marginal zone lymphomas rank as the third most prevalent form of non-Hodgkin B-cell lymphoma, trailing behind diffuse large B-cell lymphoma and follicular lymphoma. Gastric mucosa-associated lymphoid tissue lymphoma (GML) is a low-grade B-cell neoplasia frequently correlated with Helicobacter pylori (H. pylori)-induced chronic gastritis. On the other hand, a specific subset of individuals diagnosed with GML does not exhibit H. pylori infection. In contrast to its H. pylori-positive counterpart, it was previously believed that H. pylori-negative GML was less likely to respond to antimicrobial therapy. Despite this, surprisingly, in-creasing evidence supports that a considerable proportion of patients with H. pylori-negative GML show complete histopathological remission after bacterial eradication therapy. Nonetheless, the precise mechanisms underlying this treatment responsiveness are not yet fully comprehended. In recent years, there has been growing interest in investigating the role of non-H. pylori gastric helicobacters (NHPHs) in the pathogenesis of H. pylori-negative GML. However, additional research is required to establish the causal relationship between NHPHs and GML. In this minireview, we examined the current understanding and proposed prospects on the involvement of NHPHs in H. pylori-negative GML, as well as their potential response to bacterial eradication therapy.


Assuntos
Gastrite , Infecções Intra-Abdominais , Linfoma de Zona Marginal Tipo Células B , Neoplasias Gástricas , Humanos , Linfoma de Zona Marginal Tipo Células B/tratamento farmacológico , Gastrite/tratamento farmacológico
5.
World J Virol ; 12(3): 193-203, 2023 Jun 25.
Artigo em Inglês | MEDLINE | ID: mdl-37396702

RESUMO

The pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection has been a major challenge to be faced in recent years. While adults suffered the highest morbidity and mortality rates of coronavirus disease 2019, children were thought to be exclusively asymptomatic or to present with mild conditions. However, around April 2020, there was an outbreak of a new clinical syndrome related to SARS-CoV-2 in children - multisystemic inflammatory syndrome in children (MIS-C) - which comprises a severe and uncon-trolled hyperinflammatory response with multiorgan involvement. The Centers for Disease Control and Prevention considers a suspected case of MIS-C an individual aged < 21 years presenting with fever, high inflammatory markers levels, and evidence of clinically severe illness, with multisystem (> 2) organ involvement, no alternative plausible diagnoses, and positive for recent SARS-CoV-2 infection. Despite its severity, there are no definitive disease management guidelines for this condition. Conversely, the complex pathogenesis of MIS-C is still not completely understood, although it seems to rely upon immune dysregulation. Hence, in this study, we aim to bring together current evidence regarding the pathogenic mechanisms of MIS-C, clinical picture and management, in order to provide insights for clinical practice and implications for future research directions.

7.
Artigo em Inglês | MEDLINE | ID: mdl-37297612

RESUMO

The COVID-19 pandemic was a source of significant stress due to health and safety concerns and measures to control the virus' spread, such as mobility restrictions. This measure was especially demanding for parents with school aged children, who had to find new work-family balance as their children participate in online education while attempting to work remotely. To evaluate parents' stress trajectories during the pandemic, we conducted Ecological Momentary Assessments (EMAs) during lockdown for 29 days in 68 families in Santiago, Chile. In addition, we evaluated the role of educational level and income, co-parenting, and number of children in parents' stress trajectories. Our results showed that during the first weeks of lockdown expected protective factors (i.e., income and co-parental support) were not able to influence parents' daily stress management. Moreover, parents with higher educational levels reported worse stress adaptation than less educated parents. On the other hand, co-parental conflict was significantly associated with parent's stress. Our study captured an acute response to COVID-19 related challenges. This study contributes to understanding how parents adjust to stress during adverse circumstances such as the COVID-19 pandemic.


Assuntos
COVID-19 , Criança , Humanos , COVID-19/epidemiologia , Avaliação Momentânea Ecológica , Pandemias , Inquéritos e Questionários , Controle de Doenças Transmissíveis
8.
Rev Bras Enferm ; 76(2): e20220351, 2023.
Artigo em Inglês, Português | MEDLINE | ID: mdl-37162045

RESUMO

OBJECTIVES: to analyze the trend, according to sex, of Ambulatory Care-Sensitive Conditions in the Primary Health Care of the Federal District, from 2009 to 2019. METHODS: ecological trend study using ACSC hospitalization data available in the Hospitalization System of the Single Health System. The Prais-Winsten method was used to calculate the annual rate variation, expressed in percentages. The dependent variable was the logarithm of the rates, and the independent one, the years in the time series. RESULTS: the Federal District registered 2,103,951 general hospitalizations, 16.4% of which were due to Ambulatory Care-Sensitive Conditions. Males had a higher rate of hospitalization in the period, and both sexes showed a stationary trend. CONCLUSIONS: the time trend of Ambulatory Care- Sensitive Conditions was stationary, but further studies are necessary regarding primary health care coverage.


Assuntos
Hospitalização , Comportamento Sexual , Feminino , Masculino , Humanos , Fatores de Tempo , Assistência Ambulatorial
9.
World J Gastroenterol ; 29(14): 2202-2221, 2023 Apr 14.
Artigo em Inglês | MEDLINE | ID: mdl-37122607

RESUMO

BACKGROUND: Gastric mucosa-associated lymphoid tissue (MALT) lymphoma (GML) is usually a low-grade B-cell neoplasia strongly associated with Helicobacter pylori (H. pylori)-induced chronic gastritis. Clinical practice guidelines currently recommend H. pylori eradication as the preferred initial treatment for early-stage GML. To determine the practical effect of bacterial eradication as the sole initial therapy for early-stage GML, an updated analysis and review of available evidence is imperative. AIM: To perform a meta-analysis to assess the rate of complete remission (CR) of H. pylori-positive early-stage GML following bacterial eradication. METHODS: We performed independent, computer-assisted literature searches using the PubMed/MEDLINE, Embase, and Cochrane Central databases through September 2022. Prospective and retrospective observational studies evaluating the CR of early-stage GML following bacterial eradication in H. pylori-positive patients. The risk of bias was assessed using Joanna Briggs Institute (JBI) Critical Appraisal Tools. The pooled estimate of the complete histopathological remission rate and respective confidence intervals (95%CI) were calculated following the random-effects model. Heterogeneity and inconsistency were assessed using Cochran's Q test and I2 statistic, and heterogeneity was defined as P < 0.01 and I² > 50%, respectively. Subgroup and meta-regression analyses were conducted to explore potential sources of heterogeneity. RESULTS: The titles and abstracts of 1576 studies were screened; 96 articles were retrieved and selected for full-text reading. Finally, 61 studies were included in the proportional meta-analysis (P-MA). Forty-six were prospective and fifteen were retrospective uncontrolled, single-arm, observational studies. The overall risk of bias was low to moderate in all but a single report, with an average critical appraisal score across all studies of 79.02%. A total of 2936 H. pylori-positive early-stage GML patients, in whom H. pylori was successfully eradicated, were included in the analysis. The pooled CR of H. pylori-positive early-stage GML after bacterial eradication was 75.18% (95%CI: 70.45%-79.91%). P-MA indicated the substantial heterogeneity in CR reported across studies (I 2 = 92%; P < 0.01). Meta-regression analysis identified statistically significant effect modifiers, including the proportion of patients with t(11;18)(q21;q21)-positive GML and the risk of bias in each study. CONCLUSION: Comprehensive synthesis of available evidence suggests that H. pylori eradication is effective as the sole initial therapy for early-stage GML. Although the substantial heterogeneity observed across studies limits the interpretation of the pooled overall CR, the present study is a relevant to informing clinical practice.


Assuntos
Infecções por Helicobacter , Helicobacter pylori , Linfoma de Zona Marginal Tipo Células B , Neoplasias Gástricas , Humanos , Linfoma de Zona Marginal Tipo Células B/microbiologia , Antibacterianos/farmacologia , Estudos Retrospectivos , Estudos Prospectivos , Infecções por Helicobacter/microbiologia , Neoplasias Gástricas/patologia
10.
World J Clin Oncol ; 14(4): 138-159, 2023 Apr 24.
Artigo em Inglês | MEDLINE | ID: mdl-37124134

RESUMO

Glioblastoma remains as the most common and aggressive malignant brain tumor, standing with a poor prognosis and treatment prospective. Despite the aggressive standard care, such as surgical resection and chemoradiation, median survival rates are low. In this regard, immunotherapeutic strategies aim to become more attractive for glioblastoma, considering its recent advances and approaches. In this review, we provide an overview of the current status and progress in immunotherapy for glioblastoma, going through the fundamental knowledge on immune targeting to promising strategies, such as Chimeric antigen receptor T-Cell therapy, immune checkpoint inhibitors, cytokine-based treatment, oncolytic virus and vaccine-based techniques. At last, it is discussed innovative methods to overcome diverse challenges, and future perspectives in this area.

11.
World J Methodol ; 13(5): 399-413, 2023 Dec 20.
Artigo em Inglês | MEDLINE | ID: mdl-38229938

RESUMO

Crohn's Disease (CD) is an Inflammatory Bowel Disease and is characterized by an immune-mediated nature. Its etiology results from the interaction between genetic, enviromental and microbial factors. Regarding pathophysiology, it involves high levels of interleukin (IL)-12, IL-17, and Th1 profile, along with loss of tolerance mechanisms, an increase in pro-inflammatory interleukins, beyond the possibility to affect any part of the gastrointestinal tract. Its symptoms include abdominal pain, chronic diarrhea, weight loss, anorexia, and fatigue, as well as blood in the stool or rectum. Additionally, conditions comprising musculoskeletal, cutaneous, ocular, hepatic, and hematological alterations may be associated with this scenario and extra-intestinal presentation, such as erythema nodosum, anterior uveitis, osteoporosis, and arthritis can also occur. Today, clinical history, exams as fecal calprotectin, ileocolonocopy, and capsule endoscopy can be performed in the diagnosis investigation, along with treatments to induce and maintain remission. In this sense, anti-inflammatory drugs, such as corticosteroids, immunomodulators, and biological agents, as well as surgery and non-pharmacological interventions plays a role in its therapy. The aim of this review is to bring more current evidence to clinical management of CD, as well as to briefly discuss aspects of its pathophysiology, surveillance, and associated disorders.

12.
Rev. bras. enferm ; Rev. bras. enferm;76(2): e20220351, 2023. tab, graf
Artigo em Inglês | LILACS-Express | LILACS, BDENF - Enfermagem | ID: biblio-1441252

RESUMO

ABSTRACT Objectives: to analyze the trend, according to sex, of Ambulatory Care-Sensitive Conditions in the Primary Health Care of the Federal District, from 2009 to 2019. Methods: ecological trend study using ACSC hospitalization data available in the Hospitalization System of the Single Health System. The Prais-Winsten method was used to calculate the annual rate variation, expressed in percentages. The dependent variable was the logarithm of the rates, and the independent one, the years in the time series. Results: the Federal District registered 2,103,951 general hospitalizations, 16.4% of which were due to Ambulatory Care-Sensitive Conditions. Males had a higher rate of hospitalization in the period, and both sexes showed a stationary trend. Conclusions: the time trend of Ambulatory Care- Sensitive Conditions was stationary, but further studies are necessary regarding primary health care coverage.


RESUMEN Objetivos: analizar tendencia de Internaciones por Condiciones Sensibles a la Atención Primaria por sexo en Distrito Federal desde 2009 a 2019. Métodos: estudio ecológico de tendencia con datos de ICSAP disponibles en el Sistema de Internaciones Hospitalarias del Sistema Único de Salud. Utilizado método de Prais-Winsten para el cálculo de la variación porcentual anual de las tasas. La variable dependiente fue el logaritmo de las tasas, y la independiente, los años de la serie temporal. Resultados: Distrito Federal registró 2.103.951 internaciones generales, siendo 16,4% Internaciones por Condiciones Sensibles a la Atención Primaria. El sexo masculino obtuvo la mayor tasa de internación en todo el periodo y hubo tendencia estacionaria tanto para el sexo masculino mientras el femenino. Conclusiones: las tendencias temporales de las Internaciones por Condiciones Sensibles a la Atención Ambulatoria mostradas estacionarias, pero resaltada la necesidad de estudios de correlación con la cobertura de la atención primaria de salud.


RESUMO Objetivos: analisar a tendência das Internações por Condições Sensíveis à Atenção Primária por sexo no Distrito Federal, no período de 2009 a 2019. Métodos: estudo ecológico de tendência com dados de ICSAP disponíveis no Sistema de Internações Hospitalares do Sistema Único de Saúde. Utilizou-se o método de Prais-Winsten para o cálculo da variação percentual anual das taxas. A variável dependente foi o logaritmo das taxas; e a variável independente, os anos da série temporal. Resultados: o Distrito Federal registrou 2.103.951 internações gerais, sendo 16,4% Internações por Condições Sensíveis à Atenção Primária. O sexo masculino obteve a maior taxa de internação em todo o período, e houve tendência estacionária tanto para o sexo masculino quanto para o sexo feminino. Conclusões: as tendências temporais das Internações por Condições Sensíveis à Atenção Primária mostraram-se estacionárias, porém ressalta-se a necessidade de estudos de correlação com a cobertura da Atenção Primária à Saúde.

13.
Biota Neotrop. (Online, Ed. ingl.) ; 23(4): e20231517, 2023. tab, graf
Artigo em Inglês | LILACS-Express | LILACS | ID: biblio-1527948

RESUMO

Abstract Canga is an environment of great natural and economic value because it harbours a considerable number of endemic species on a substrate that is rich in iron ore. In the Amazon, this open vegetation type grows on top of isolated outcrops in a dense forest matrix found in the Carajás region, in southeastern Pará. Of these outcrops, the Parque Nacional dos Campos Ferruginosos (PNCF) is the only area of Amazonian canga with a strict protection status. Therefore, industrial activity in the region needs to implement mitigation actions to ensure species and habitat conservation. The objective of this study is to complement and review the floristic list of this recently created protected area, enabling us to compare the floristic similarity between it and other 14 Amazonian canga outcrops found outside the conservation units of full protection in the region. This data provides a basis to understand the floristic and phylogenetic complementarity of those patches to support conservation action. For this, six field trips were carried out in the Serra da Bocaina and two in the Serra do Tarzan, respectively, in order to increase the sampling efforts in PNCF and to obtain a more comprehensive plant list. Floristic composition was investigated using multivariate analyses (non-metric multidimensional scaling and unweighted pair group method with arithmetic mean) and phylogenetic structure across studied areas. We added 159 species to the floristic list of the PNCF and the results of the analyses showed that all 16 areas (n.b. PNCF comprises two of these sites) have an overall floristic similarity of 42%, with the least similar areas at 35% and the most similar at 50%. The different micro-habitats found in each study site highlight the high beta diversity of the Amazonian canga sites, making each area unique. Therefore, even if the Parque Nacional dos Campos Ferruginosos does not harbour all the species found in the other Amazonian canga sites, it is strategic for the conservation of the vegetation on ferruginous outcrops in the Amazon, protecting its biodiversity, different habitats, and associated ecosystem services.


Resumo Canga é um ambiente de grande valor natural e econômico por abrigar um número considerável de espécies endêmicas sobre substrato rico em minério de ferro. Na Amazônia, esse tipo de vegetação aberta cresce sobre afloramentos isolados em uma matriz de floresta densa encontrada na região de Carajás, no sudeste do Pará. Dentre esses afloramentos, o Parque Nacional dos Campos Ferruginosos (PNCF) é a única área de canga Amazônica que apresenta o status de proteção integral permanente. Dessa forma, a atividade industrial presente na região necessita implementar ações de mitigação para assegurar a conservação de espécies e habitats relacionados às cangas. O objetivo deste estudo é complementar e revisar a lista florística dessa área protegida, recentemente criada, permitindo comparar a sua similaridade florística com outros 14 afloramentos de cangas Amazônicas localizados fora de unidades de conservação de proteção integral encontradas na região. Tais dados fornecem subsídio para entender a complementaridade florística e filogenética desses fragmentos para apoiar ações de conservação. Para isso, foram realizadas seis viagens de coleta à Serra da Bocaina e à Serra do Tarzan, respectivamente, para aumentar o esforço amostral no PNCF e obter uma lista de plantas mais abrangente. A composição florística foi investigada por meio de análises multivariadas (non-metric multidimensional scaling and unweighted pair group method with arithmetic mean) e estrutura filogenética nas áreas estudadas. Nós adicionamos 159 espécies na lista florística do PNCF e os resultados das análises demonstraram que todas as 16 áreas (n.b. o PNCF compreende duas dessas áreas) têm uma similaridade florística total de 42%, com áreas menos similares de 35% e as mais similares de 50%. Os micro-habitats encontrados em cada área de estudo evidenciam a alta diversidade beta das áreas de cangas Amazônicas, o que as tornam únicas. Portanto, ainda que o Parque Nacional dos Campos Ferruginosos não abrigue todas as espécies encontradas em outras áreas de cangas Amazônicas, ele é estratégico para a conservação dos afloramentos ferruginosos na Amazônia, protegendo a sua biodiversidade, os diferentes habitats e os serviços ecossistêmicos associados.

14.
World J Clin Oncol ; 13(11): 866-879, 2022 Nov 24.
Artigo em Inglês | MEDLINE | ID: mdl-36483973

RESUMO

Gastric cancer is the fifth most common malignancy and third leading cancer-related cause of death worldwide. Helicobacter pylori is a Gram-negative bacterium that inhabits the gastric environment of 60.3% of the world's population and represents the main risk factor for the onset of gastric neoplasms. CagA is the most important virulence factor in H. pylori, and is a translocated oncoprotein that induces morphofunctional modifications in gastric epithelial cells and a chronic inflammatory response that increases the risk of developing precancerous lesions. Upon translocation and tyrosine phosphorylation, CagA moves to the cell membrane and acts as a pathological scaffold protein that simultaneously interacts with multiple intracellular signaling pathways, thereby disrupting cell proliferation, differentiation and apoptosis. All these alterations in cell biology increase the risk of damaged cells acquiring pro-oncogenic genetic changes. In this sense, once gastric cancer sets in, its perpetuation is independent of the presence of the oncoprotein, characterizing a "hit-and-run" carcinogenic mechanism. Therefore, this review aims to describe H. pylori- and CagA-related oncogenic mechanisms, to update readers and discuss the novelties and perspectives in this field.

15.
World J Clin Cases ; 10(31): 11283-11291, 2022 Nov 06.
Artigo em Inglês | MEDLINE | ID: mdl-36387830

RESUMO

Helicobacter pylori (H. pylori) is a Gram-negative bacterium that infects about half of the world's population. H. pylori infection prevails by several mechanisms of adaptation of the bacteria and by its virulence factors including the cytotoxin associated antigen A (CagA). CagA is an oncoprotein that is the protagonist of gastric carcinogenesis associated with prolonged H. pylori infection. In this sense, small regulatory RNAs (sRNAs) are important macromolecules capable of inhibiting and activating gene expression. This function allows sRNAs to act in adjusting to unstable environmental conditions and in responding to cellular stresses in bacterial infections. Recent discoveries have shown that nickel-regulated small RNA (NikS) is a post-transcriptional regulator of virulence properties of H. pylori, including the oncoprotein CagA. Notably, high concentrations of nickel cause the reduction of NikS expression and consequently this increases the levels of CagA. In addition, NikS expression appears to be lower in clinical isolates from patients with gastric cancer when compared to patients without. With that in mind, this minireview approaches, in an accessible way, the most important and current aspects about the role of NikS in the control of virulence factors of H. pylori and the potential clinical repercussions of this modulation.

16.
World J Methodol ; 12(5): 365-380, 2022 Sep 20.
Artigo em Inglês | MEDLINE | ID: mdl-36186752

RESUMO

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection has affected the entire world, causing the coronavirus disease 2019 (COVID-19) pandemic since it was first discovered in Wuhan, China in December 2019. Among the clinical presentation of the disease, in addition to fever, fatigue, cough, dyspnea, diarrhea, nausea, vomiting, and abdominal pain, infected patients may also experience neurological and psychiatric repercussions during the course of the disease and as a post-COVID-19 sequelae. Thus, headache, dizziness, olfactory and gustatory dysfunction, cerebrovascular disorders, neuromuscular abnormalities, anxiety, depression, and post-traumatic stress disorder can occur both from the infection itself and from social distancing and quarantine. According to current evidence about this infection, the virus has the ability to infect the central nervous system (CNS) via angiotensin-converting enzyme 2 (ACE2) receptors on host cells. Several studies have shown the presence of ACE2 in nerve cells and nasal mucosa, as well as transmembrane serine protease 2, key points for interaction with the viral Spike glycoprotein and entry into the CNS, being olfactory tract and blood-brain barrier, through hematogenous dissemination, potential pathways. Thus, the presence of SARS-CoV-2 in the CNS supports the development of neuropsychiatric symptoms. The management of these manifestations seems more complex, given that the dense parenchyma and impermeability of brain tissue, despite protecting the brain from the infectious process, may hinder virus elimination. Still, some alternatives used in non-COVID-19 situations may lead to worse prognosis of acute respiratory syndrome, requiring caution. Therefore, the aim of this review is to bring more current points related to this infection in the CNS, as well as the repercussions of the isolation involved by the pandemic and to present perspectives on interventions in this scenario.

17.
World J Exp Med ; 12(5): 100-103, 2022 Sep 20.
Artigo em Inglês | MEDLINE | ID: mdl-36196438

RESUMO

Qualitative antibody tests are an easy, point-of-care diagnostic method that is useful in diagnosing coronavirus disease 2019, especially in situations where reverse transcription-polymerase chain reaction is negative. However, some factors are able to affect its sensitivity and accuracy, which may contribute to these tests not being used as a first-line diagnostic tool.

18.
World J Clin Oncol ; 13(3): 186-199, 2022 Mar 24.
Artigo em Inglês | MEDLINE | ID: mdl-35433296

RESUMO

Gastric cancer (GC) is the result of a multifactorial process whose main components are infection by Helicobacter pylori (H. pylori), bacterial virulence factors, host immune response and environmental factors. The development of the neoplastic microenvironment also depends on genetic and epigenetic changes in oncogenes and tumor suppressor genes, which results in deregulation of cell signaling pathways and apoptosis process. This review summarizes the main aspects of the pathogenesis of GC and the immune response involved in chronic inflammation generated by H. pylori.

19.
Texto & contexto enferm ; 31: e20210088, 2022. tab, graf
Artigo em Inglês | LILACS-Express | LILACS, BDENF - Enfermagem | ID: biblio-1377427

RESUMO

ABSTRACT Objective: to analyze the trend of hospitalizations due to Ambulatory Care Sensitive Conditions in Pediatrics in Distrito Federal, during the 2008-2018 period. Method: a time series study conducted between 2008 and 2018 with data from Distrito Federal, Brazil, in the age group from 0 to 14 years old. The data were collected in the SUS Hospital Information System, and they were used to perform trend analyses of the most frequent groups. Results: there was a trend towards a significant increase in hospitalizations in the age group studied, with an annual percentage variation of 1.42% and a confidence interval between 0.05 and 2.81. Four groups of reasons for hospitalization and diagnoses were more frequent in the period, namely: bacterial pneumonias, infectious gastroenteritis and complications, pulmonary diseases, and asthma. Among the most frequent groups, considering the study period, there was a trend towards a significant increase in pulmonary diseases (15.71%; 12.40 and 19.12); a trend towards a significant reduction in infectious gastroenteritis and complications (-5.35%; -8.01 and 2.61); and a stationary trend in bacterial pneumonias (-0.43%; -3.80 and 3.07) and asthma (3.82%; 0.57 and 8.40). Conclusion: the results of this study can contribute to the planning, evaluation and monitoring of primary care actions, as this indicator aims at indirectly evaluating access and effectiveness of this care level. In this sense, considering the results of the trend analysis performed, it can be concluded that they do not yet reflect the expected results with the expansion of FHS coverage.


RESUMEN Objetivo: analizar la tendencia de las internaciones por patologías pasibles de atención primaria en Pediatría en el Distrito Federal, en el período de 2008 a 2018. Método: estudio de series temporales con datos del Distrito Federal, Brasil, en el grupo etario de 0 a 14 años, realizado entre 2008 y 2018. Los dados se recolectaron desde el Sistema de Información Hospitalaria del SUS, con los cuales se realizaron análisis de tendencia de los grupos más frecuentes. Resultados: se registró una significativa tendencia de aumento en las internaciones, dentro del grupo etario del estudio, cuya variación porcentual anual fue del 1,42% con un intervalo de confianza entre 0,05 y 2,81. Cuatro grupos de causas de internación y diagnósticos fueron más frecuentes en el período, a saber: neumonías bacterianas, gastroenteritis infecciosas y complicaciones, enfermedades pulmonares y asma. Entre los grupos más frecuentes, considerando el período del estudio, hubo una significativa tendencia de aumento en las enfermedades pulmonares (15,71%; 12,40 y 19,12); así como una significativa tendencia decreciente en las gastroenteritis infecciosas y complicaciones (-5,35%; -8,01 y 2,61) y una tendencia estacionaria en las neumonías bacterianas (-0,43%; -3,80 y 3,07) y en el asma (3,82%; 0,57 y 8,40). Conclusión: los resultados de este estudio pueden contribuir en la planificación, la evaluación y el control de las acciones en atención primaria, ya que la intención de este es evaluar indirectamente el acceso y la efectividad de este nivel de atención. En este sentido, y considerando los resultados del análisis de tendencia realizado, se puede concluir que dichos resultados todavía no reflejan los esperados con la ampliación de la cobertura de la ESF.


RESUMO Objetivo: analisar a tendência de internações por condições sensíveis à atenção primária em pediatria no Distrito Federal, no período de 2008 a 2018. Método: estudo de séries temporais com dados do Distrito Federal, Brasil, na faixa etária de 0-14 anos, entre 2008 e 2018. Os dados foram coletados no Sistema de Informações Hospitalares do SUS, com os quais foram realizadas análises de tendência dos grupos mais frequentes. Resultados: houve tendência de aumento significante nas internações, na faixa etária do estudo, cuja variação percentual anual foi de 1,42% e intervalo de confiança entre 0,05 e 2,81. Quatro grupos de causas de internação e diagnósticos foram mais frequentes no período: pneumonias bacterianas, gastroenterites infecciosas e complicações, doenças pulmonares e asma. Entre os grupos mais frequentes, considerando o período do estudo, houve tendência de aumento significante nas doenças pulmonares (15,71%; 12,40 e 19,12); tendência de redução significante nas gastroenterites infecciosas e complicações (-5,35%; -8,01 e 2,61); e tendência estacionária nas pneumonias bacterianas (-0,43%; -3,80 e 3,07) e asma (3,82%; 0,57 e 8,40). Conclusão: os resultados deste estudo podem contribuir no planejamento, avaliação e monitoramento das ações da atenção primária, visto que este indicador se propõe a avaliar indiretamente acesso e efetividade desse nível de atenção. Nesse sentido, considerando os resultados da análise de tendência realizada, pode-se concluir que os mesmos não refletem, ainda, os resultados esperados com a ampliação da cobertura de ESF.

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