Synthesis, and antitumoral and antiviral evaluation of polyacetylene glycoside derivatives.

A series of novel derivatives of Poliacetylene Glycosides (PAGs) were synthesized, and their antiproliferative and antiviral properties were evaluated. Starting from D-(+)-glucose pentaacetate as a precursor, a commercially available and low-cost starting material, three different strategies were attempted to synthesize the new PAGs, and the desired compounds were obtained in high overall yields after only three steps. The synthesized PAGs exhibited antitumoral activity in concentrations ranging from 68-878 μM and antiviral activities in concentrations ranging from 71-794 μM.

Unraveling neuroprotection with Kv1.3 potassium channel blockade by a scorpion venom peptide.

Voltage-gated potassium channels play a crucial role in cellular repolarization and are potential therapeutic targets in neuroinflammatory disorders and neurodegenerative diseases. This study explores Tityus bahiensis scorpion venom for neuroactive peptides. We identified the αKtx12 peptide as a potent neuroprotective agent.

Use of an ambient artificial intelligence tool to improve quality of clinical documentation.

Background: Electronic health records (EHRs) have contributed to increased workloads for clinicians. Ambient artificial intelligence (AI) tools offer potential solutions, aiming to streamline clinical documentation and alleviate cognitive strain on healthcare providers.

Objective: To assess the clinical utility of an ambient AI tool in enhancing consultation experience and the completion of clinical documentation.

Palladium-Catalyzed Carbonylative Cyclization of 1-Alkynyl-2-iodo-d-glucal.

Cascade reactions are important synthetic tools for the synthesis of heterocyclic molecules, particularly those catalyzed by palladium. Herein, we report a palladium-catalyzed aminocarbonylative cyclization of new 1-alkynyl-2-iodo-d-glucals, which undergo a tandem carbonylative cyclization in the presence of various amine nucleophiles. A broad range of aromatic and aliphatic amines were applied as coupling partners, resulting in the selective and high-yield synthesis of glycosides fused to pyridinones.

1-Iodoglycal: A Versatile Intermediate for the Synthesis of d-Glyco Amides and Esters Employing Carbonylative Cross-Coupling Reaction.

In this study, we present the development of two catalytic processes: a Pd-PEPPSI-catalyzed aminocarbonylation and a Pd(OAc)-Xantphos-catalyzed alkoxycarbonylation of d-glycals, utilizing carbonylative cross-coupling reactions. We explored successfully various types of aromatic amines, as well as alkyl amines and amino acids, to synthesize new d-glycal amides. However, we observed limitations in the reactivity of alkyl and heteroaromatic amines.

Exercise effects on cortical excitability in pain populations: A systematic review and meta-analysis.

Background: Transcranial Magnetic Stimulation (TMS) studies examining exercise-induced neuroplasticity in pain populations have produced contradictory findings. We conducted a systematic review to explore how exercise impacts cortical excitability in pain populations using TMS metrics. This review aims to summarize the effect sizes and to understand their sources of heterogeneity.

Impact of Electronic Health Record Use on Cognitive Load and Burnout Among Clinicians: Narrative Review.

The cognitive load theory suggests that completing a task relies on the interplay between sensory input, working memory, and long-term memory. Cognitive overload occurs when the working memory's limited capacity is exceeded due to excessive information processing. In health care, clinicians face increasing cognitive load as the complexity of patient care has risen, leading to potential burnout.

Milk provisioning in oviparous caecilian amphibians.

Among vertebrates, the yolk is commonly the only form of nutritional investment offered by the female to the embryo. Some species, however, have developed parental care behaviors associated with specialized food provisioning essential for offspring survival, such as the production of lipidic-rich parental milk in mammals. Here, we show that females of the egg-laying caecilian amphibian provide similarly lipid-rich milk to altricial hatchlings during parental care.

Global proteome of the saprophytic strain Leptospira biflexa and comparative analysis with pathogenic strain Leptospira interrogans uncover new pathogenesis mechanisms.

Leptospira is a genus of bacteria that includes free-living saprophytic species found in water or soil, and pathogenic species, which are the etiologic agents of leptospirosis. Besides all the efforts, there are only a few proteins described as virulence factors in the pathogenic strain L. interrogans.

Proteomic analyses of venom from a Spider Hawk, .

Background: The composition of the venom from solitary wasps is poorly known, although these animals are considered sources of bioactive substances. Until the present moment, there is only one proteomic characterization of the venom of wasps of the family Pompilidae and this is the first proteomic characterization for the genus .

Methods: To elucidate the components of venom, the present work sought to identify proteins using four different experimental conditions, namely: (A) crude venom; (B) reduced and alkylated venom; (C) trypsin-digested reduced and alkylated venom, and; (D) chymotrypsin-digested reduced and alkylated venom.

Spatial Distribution and Biochemical Characterization of Serine Peptidase Inhibitors in the Venom of the Brazilian Sea Anemone Using Mass Spectrometry Imaging.

Sea anemones are known to produce a diverse array of toxins with different cysteine-rich peptide scaffolds in their venoms. The serine peptidase inhibitors, specifically Kunitz inhibitors, are an important toxin family that is believed to function as defensive peptides, as well as prevent proteolysis of other secreted anemone toxins. In this study, we isolated three serine peptidase inhibitors named peptide inhibitors I, II, and III (ACPI-I, ACPI-II, and ACPI-III) from the venom of the endemic Brazilian sea anemone .

Public Involvement & Engagement in health inequalities research on COVID-19 pandemic: a case study of CIDACS/FIOCRUZ BAHIA.

Introduction: Health inequalities in Brazil have deepened on Covid-19 pandemic, and the most vulnerable people were the more affected. A multidisciplinary team from Cidacs/Fiocruz Bahia developed a Social Disparities Index for Covid-19 (IDS-COVID-19) to support the evaluation of effects of health inequalities on the pandemic in Brazil. Public Involvement and Engagement were the pillars of this research because they allowed us to access first hand experiences about the social context in our country.

Motor Cortex Inhibition and Facilitation Correlates with Fibromyalgia Compensatory Mechanisms and Pain: A Cross-Sectional Study.

The role of transcranial magnetic stimulation (TMS) measures as biomarkers of fibromyalgia syndrome (FMS) phenotypes is still unclear. We aimed to determine the clinical correlates of TMS measures in FMS patients. We conducted a cross-sectional analysis that included 58 patients.

Scorpion Peptides and Ion Channels: An Insightful Review of Mechanisms and Drug Development.

The Buthidae family of scorpions consists of arthropods with significant medical relevance, as their venom contains a diverse range of biomolecules, including neurotoxins that selectively target ion channels in cell membranes. These ion channels play a crucial role in regulating physiological processes, and any disturbance in their activity can result in channelopathies, which can lead to various diseases such as autoimmune, cardiovascular, immunological, neurological, and neoplastic conditions. Given the importance of ion channels, scorpion peptides represent a valuable resource for developing drugs with targeted specificity for these channels.

Women and working in healthcare during the Covid-19 pandemic in Brazil: bullying of colleagues.

Background: Based on a feminist approach, we analyzed the experiences of workplace bullying suffered by women front-line healthcare professionals dealing with the Covid-19 pandemic. We start from studies that show that women make up 70% of the global health workforce, 85% in the area of nursing, and 90% in the case of social care workers. An unequivocal need thus exists to address gender issues regarding the composition of the labor force in the health area.

Digestive enzymes and sphingomyelinase D in spiders without venom (Uloboridae).

Spiders have distinct predatory behaviours selected along Araneae's evolutionary history but are mainly based on the use of venom for prey paralysis. Uloboridae spiders have lost their venom glands secondarily during evolution. Because of this, they immobilise their prey by extensively wrapping, and digestion starts with the addition of digestive fluid.

Immunoproteomics approach for the discovery of antigens applied to the diagnosis of canine visceral leishmaniasis.

In the present study, an immunoproteomic approach using Leishmania infantum parasites isolated from naturally infected dogs from an endemic region of the disease, was carried out to identify new antigens to be used in the diagnosis of canine visceral leishmaniasis (CVL). Protein extracts, obtained from parasites isolated from asymptomatic (CanLA) and symptomatic (CanLS) dogs, were used to perform the two-dimensional gels. Western Blotting assays were carried out by employing a pool of sera from dogs with visceral leishmaniasis (CanLA or CanLS), healthy dogs from an endemic area, or dogs with similar diseases associated with cross-reactions (babesiosis and ehrlichiosis).

When benign leiomyomas metastasize to the lungs - a case report.

Benign metastasizing leiomyoma is a rare disease that primarily affects premenopausal women who have a history of uterine leiomyoma, which is characterized by pulmonary metastases. The pathogenesis of this condition is unknown. Patients are usually asymptomatic or have vague symptoms.

Spiders' digestive system as a source of trypsin inhibitors: functional activity of a member of atracotoxin structural family.

Spiders are important predators of insects and their venoms play an essential role in prey capture. Spider venoms have several potential applications as pharmaceutical compounds and insecticides. However, transcriptomic and proteomic analyses of the digestive system (DS) of spiders show that DS is also a rich source of new peptidase inhibitor molecules.

Cone snail species off the Brazilian coast and their venoms: a review and update.

The genus includes over 900 species of marine invertebrates known as cone snails, whose venoms are among the most powerful described so far. This potency is mainly due to the concerted action of hundreds of small bioactive peptides named conopeptides, which target different ion channels and membrane receptors and thus interfere with crucial physiological processes. By swiftly harpooning and injecting their prey and predators with such deadly cocktails, the slow-moving cone snails guarantee their survival in the harsh, competitive marine environment.

Unraveling and profiling Tityus bahiensis venom: Biochemical analyses of the major toxins.

Among the scorpions found in Brazil, Tityus bahiensis is one of the species that causes most of the reported human accidents. In spite of this important constatation, the venom composition description is not available in the literature. Thus, this venom remains not properly studied, segregating this particular species into an abandoned, forgotten condition.

Gender and Food insecurity in the COVID-19 pandemic in Brazil: hunger through women's voices.

This paper presents the results of the research nested in the international project "Gender and COVID-19", which includes several topics related to the impact of the pandemic on the lives of women and their families, including food insecurity and hunger. Semi-structured interviews were conducted from December 2020 to November 2021 with 49 women living in two urban conglomerates, Cabana do Pai Tomás (Belo Horizonte, MG) and Sapopemba (São Paulo, SP), and two rural quilombola communities, Córrego do Rocha (Chapada do Norte, MG) and Córrego do Narciso (Araçuaí, MG). The analyses were based on the following categories: hunger-related feelings and terms; reduced food amount and quality; lack of food and nutrients; difficulties producing food, receiving emergency aid or food donations; governments evaluation and support networks.