Publications by authors named "Claudio G L Silva"

Coccidioidomycosis is a systemic fungal infection that primarily affects the lungs in mammals. It is endemic to certain areas of the Americas. In Brazil, the disease occurs exclusively in the Northeast of the country, and the only etiological agent described is Coccidioides posadasii, typically found in the soil of arid regions with low rainfall.

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Article Synopsis
  • Existing leishmaniasis treatments have limitations and side effects, prompting the exploration of new alternatives like the lectin DVL from Dioclea violacea seeds.
  • DVL showed significant leishmanicidal effects against Leishmania infantum in vitro, inducing reactive oxygen species and damaging the parasite's membrane, with an effective concentration of 49.37 μg/mL.
  • DVL enhanced the effectiveness of traditional drugs like amphotericin B and glucantime, reduced macrophage infection rates, and exhibited no toxicity in healthy cells, indicating its potential as a treatment for visceral leishmaniasis.
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Leishmaniases, caused by Leishmania parasites, are widespread and pose significant health risks globally. Visceral leishmaniasis (VL) is particularly prevalent in Brazil, with high morbidity and mortality rates. Traditional treatments, such as pentavalent antimonials, have limitations due to toxicity and resistance.

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Lectins are proteins widely distributed among plants, animals and microorganisms that have the ability to recognize and interact with specific carbohydrates. They have varied biological activities, such as the inhibition of the progression of infections caused by fungi, bacteria, viruses and protozoa, which is related to the interaction of these proteins with the carbohydrates present in the cell walls of these microorganisms. Leishmaniasis are a group of endemic infectious diseases caused by protozoa of the genus and tests with promastigotes and amastigotes of demonstrated that lectins have the ability to interact with glycoconjugates present on the cell surface of the parasite, it prevents their development through various mechanisms of action, such as the production of ROS and alteration of membrane integrity, and can also interact with defense cells present in the human body, thus showing that these molecules can be considered alternative pharmacological targets for the treatment of leishmaniasis.

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Introduction: Trypsin inhibitors (TIs) have the ability to competitively or non-competitively bind to trypsin and inhibit its action. These inhibitors are commonly found in plants and are used in protease inhibition studies involved in biochemical pathways of pharmacological interest.

Objectives: This work aimed to purify a trypsin inhibitor from seeds (TI), describing its kinetic mechanism and anticoagulant effect.

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Objective: The objective of this systematic review was to analyze the main morphofunctional changes in the involvement of multiple organs in patients infected with SARS-CoV-2, correlating anatomopathological findings with the clinical picture.

Methods: The present study selected articles through electronic search of indexed journals in the PubMed and SciVerse Scopus databases, from December 2019 to May 2020, using the keywords "autopsy," "pathogenicity," and "COVID-19." Two hundred nine articles were identified, and the full texts of 18 articles were reviewed, 5 of them being selected for this review.

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Despite the recent announcement of the new pathogenic coronavirus to man, SARS-CoV2, a large number of publications are presented to the scientific community. An organized and systematic review of the epidemiological, etiological, and pathogenic factors of COVID-19 is presented. This is a systematic review using the databases MEDLINE, EMBASE, Web of Science, SCIELO; the descriptors coronavirus, SARS-CoV-2, etiology, epidemiology, pathophysiology, pathogenesis, COVID-19, with publications from December 2019 to January 2021, resulting in more than 800 publications and 210 selected.

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As the crisis in Venezuela deepens, an increasing number of children urgently needs shelter, protection, and access to basic services, including food, medicine, clean water, and sanitation. Children and young people in transit are particularly at risk of criminal activity or being separated from their families. The consequences of the humanitarian crisis for children could be devastating for the country's future.

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Over the past few decades, several publications have investigated the role of Epstein-Barr virus (EBV) in head and neck squamous cell carcinomas, and an increasing number of them have shown its presence in laryngeal tumors. The purpose of this meta-analysis was to evaluate the association of EBV with laryngeal carcinoma. The search was carried out in two databases, Scopus and PubMed, using the following terms: "Epstein-Barr virus" and "laryngeal carcinoma".

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The use of schiff base complex against microbial agentes a has recently received more attention as a strategy to combat infections caused by multidrug-resistant bacteria and leishmania. This study aimed to evaluate the toxicity, antibacterial and leishmanicidal activities of the nickel (II) chloride schiff base complex ([Ni(L2)] against Leishmania amazonensis promastigote, multi-resistant bacterial strains and evaluate to modulate antibiotic activity against multi-resistant bacterial. The schiff base complex was characterized by the techniques of elemental analysis, Fourier transform infrared spectroscopy (FTIR), UV-vis absorption spectroscopy and thermal analysis (TGA/DTG/DSC).

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Article Synopsis
  • * Molecular docking analysis indicated that CCL interacts with carbohydrates in a way similar to other galectins, and it demonstrated significant anti-leishmanial activity by inhibiting the growth of the Leishmania infantum parasite.
  • * CCL is recognized as one of the few sponge lectins with a fully determined primary structure, showing great potential for biotechnological applications, particularly in the fight against diseases like Leishmaniasis.
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The excessive deposition of β-amyloid proteins (Aβ) is directly correlated with the establishment and development of Alzheimer's Disease (AD). Current treatments for AD only reduce symptoms instead of acting on Aβ, the primary etiological agent. Hence, the anti-amyloid effect of regular exercise has been widely investigated as an alternative therapy.

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Aims: Alzheimer's disease (AD) is the most common irreversible chronic neurodegenerative disease. It is characterized by the abnormal accumulation of β-amyloid protein (Aβ), which triggers homeostatic breakage in several physiological systems. However, the effect of chronic exercise on the formation of Aβ as an alternative therapy has been investigated.

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Objective: This study aimed to evaluate the presence of human papillomavirus (HPV) and Epstein-Barr virus (EBV) and the expression of p53, p16, E-cadherin, COX-2, MLH1, and MYC in oral squamous cell carcinoma (OSCC).

Materials And Methods: One hundred OSCC specimens were submitted to in situ hybridization for HPV and EBV, and immunohistochemistry for detection of the human proteins.

Results: Thirty-one cases showed HPV in tumor tissue.

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Leishmaniases are a complex of sand fly-borne diseases that are considered a public health issue in several countries. Brazil presents high leishmaniases rates. The South of Ceará State, known as Cariri region, shows worrying statistics mainly on American tegumentary leishmaniasis.

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Introduction: It is known that viral infections are epidemiologically prevalent and some of them are harmful to the central nervous system (CNS) due to the development of neuropsychiatric syndromes which affect the cognitive, affective, behavioral and perceptual domains.

Objective: To carry out a comprehensive analysis of the psychiatric and neuropsychiatric repercussions of COVID-19 based on epidemiological, pathophysiological and clinical foundations observed in previous and recent pandemic events, and also to make a proposition about effective therapeutic interventions to help tackle this serious public health problem, more specifically in its neuropsychiatric developments.

Method: This current literature review has utilized literature reserves and scientific search engines MEDLINE, EMBASE and Web of Science.

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Background: : In Latin America there are about 45 million indigenous people in 826 communities that represent 8.3% of the population. An estimated 798,365 Aboriginal and Torres Strait Islander were in Australia, 5,2 million indigenous people living in America and 2,13 million in Canada.

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Background: Homeless experts and some federal housing officials are sounding the alarm that the patchwork of government efforts to address the coronavirus outbreak risks leaving out one group of acutely vulnerable people: the homeless. In terms of isolation, it is too unclear what that looks like if you normally sleep on the streets. In this tough moment, when people should be turned away, not only it feels inhumane, but it is also a big public health risk, because where are they going to go?

Method: The studies were identified using large-sized newspapers with international circulation RESULTS: With more cities suspecting community transmission of the novel coronavirus, people who sleep in shelters or hunker down outside already have a lower life expectancy and often have underlying health conditions that put them at greater risk if they develop COVID-19 (Global News, 2020).

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Background: The fact that COVID-19 is transmissible from human to human and associated with high morbidity and potentially fatality can intensify the perception of personal danger. In addition, the foreseeable shortage of supplies and an increasing flow of suspected and real cases of COVID-19 contribute to the pressures and concerns of health professionals.

Method: The studies were identified in well-known international journals found in two electronic databases: Scopus and Embase.

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Background: Insufficient housing quality is associated with stress and mental health impacts. Crowding, pollution, noise, inadequate lighting, lack of access to green spaces, and other environmental factors associated with slums can exacerbate mental health disorders, including depression, anxiety, violence, and other forms of social dysfunction.

Method: The studies were identified using large-sized newspapers with international circulation.

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Background: A novel form of Coronavirus (2019-nCoV) in Wuhan has created a confused and rapidly evolving situation. In this situational framework, patients and front-line healthcare workers are vulnerable.

Method: Studies were identified using large-circulation international journals found in two electronic databases: Scopus and Embase.

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Epstein-Barr virus (EBV) and human papillomavirus (HPV) have been implicated in 38% of all virus-related cancers. Over the past three decades, both have been detected in anogenital and head-and-neck squamous cell carcinomas (HNSCC), with evidence of involvement in tumor genesis and progression. Very little has been published on HPV/EBV coinfection.

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The purpose of this meta-analysis is to evaluate the association of Epstein-Barr virus (EBV) with oral squamous cell carcinoma (OSCC). We searched the electronic scientific databases of PubMed and Scopus and included a total of 53 studies that were published from 1990 to 2019. The analysis yielded a 45.

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