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The study aimed to assess the chemical composition of Miconia ibaguensis leaves extracts and fractions obtained from the ethanolic extract (EE), along with evaluating their antifungal, antibacterial, antidiabetic, and antioxidant activities. The ethyl acetate fraction (EAF) exhibited potent antifungal activity against Candida spp (1.95-3.90â µg mL-1) and potent antioxidant activity in the DPPH (1.74±0.07â µg mL-1), FRAP (654.01±42.09â µmol ETrolox/gsample), and ORAC (3698.88±37.28â µmol ETrolox/gsample) methods. The EE displayed inhibition against the α-amylase enzyme (8.42±0.05â µg mL-1). Flavonoids, hydrolysable tannins, triterpenoids, and phenolic acids, identified in the EE and fractions via (-)-HPLC-ESI-MS/MS analysis, were found to contribute to the species' biological activity potentially. These findings suggest promising avenues for further research and potential applications in pharmacology and natural products, offering new possibilities in the fight against global health issues.
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Antibacterianos , Antifúngicos , Antioxidantes , Hipoglicemiantes , Melastomataceae , Testes de Sensibilidade Microbiana , Extratos Vegetais , Folhas de Planta , Folhas de Planta/química , Extratos Vegetais/química , Extratos Vegetais/farmacologia , Extratos Vegetais/isolamento & purificação , Melastomataceae/química , Antioxidantes/farmacologia , Antioxidantes/química , Antioxidantes/isolamento & purificação , Antifúngicos/farmacologia , Antifúngicos/química , Antifúngicos/isolamento & purificação , Antibacterianos/farmacologia , Antibacterianos/química , Antibacterianos/isolamento & purificação , Hipoglicemiantes/farmacologia , Hipoglicemiantes/química , Hipoglicemiantes/isolamento & purificação , Candida/efeitos dos fármacos , alfa-Amilases/antagonistas & inibidores , alfa-Amilases/metabolismo , Flavonoides/química , Flavonoides/farmacologia , Flavonoides/isolamento & purificação , Cromatografia Líquida de Alta PressãoRESUMO
INTRODUCTION: Lantana trifolia L. (Verbenaceae) is a shrubby plant. In folk medicine, its leaves are used in the form of infusions and syrups to treat angina, coughs, and colds; they are also applied as tranquilizer. Previous studies have reported the antimicrobial potential of the compounds present in L. trifolia leaves. OBJECTIVES: To report the anti-Candida activities of the fractions obtained from the fruits and leaves of two L. trifolia specimens. METHODS: The L. trifolia fractions were submitted to UFLC-DAD-(+)-ESI-MS/MS, and the data were analyzed by using multivariate statistical tools (PCA, PLS-DA) and spectral similarity analyses based on molecular networking, which aided dereplication of the bioactive compounds. Additionally, NMR analyses were performed to confirm the chemical structure of some of the major compounds in the fractions. RESULTS: The ethyl acetate fractions presented MIC values lower than 100 µg mL-1 against the three Candida strains evaluated herein (C. albicans, C. tropicalis, and C. glabrata). Fractions FrPo AcOEt, FrPe AcOEt, and FrPe nBut had MIC values of 1.46, 2.93, and 2.93 µg mL-1 against C. glabrata, respectively. These values resembled the MIC value of amphotericin B, the positive control (0.5-1.0 µg mL-1), against this same strain. Cytotoxicity was measured and used to calculate the selectivity index. CONCLUSION: On the basis of our data, the most active fractions in the antifungal assay were more selective against C. glabrata than against non-infected cells. The analytical approach adopted here allowed us to annotate 29 compounds, nine of which were bioactive (PLS-DA results) and belong to the class of phenolic compounds.
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Antineoplásicos , Lantana , Antifúngicos/farmacologia , Antifúngicos/análise , Espectrometria de Massas em Tandem , Lantana/química , Frutas , Extratos Vegetais/farmacologia , Extratos Vegetais/química , Metabolômica , Folhas de Planta/químicaRESUMO
Despite the importance of earthworms for soil formation, more is needed to know about how Pre-Columbian modifications to soils and the landscape. Gaining a deeper understanding is essential for comprehending the historical drivers of earthworm communities and the development of effective conservation strategies in the Amazon rainforest. Human disturbance can significantly impact earthworm diversity, especially in rainforest soils, and in the particular case of the Amazonian rainforest, both recent and ancient anthropic practices may be important. Amazonian Dark Earths (ADEs) are fertile soils found throughout the Amazon Basin, created by sedentary habits and intensification patterns of pre-Colombian societies primarily developed in the second part of the Holocene period. We have sampled earthworm communities in three Brazilian Amazonian (ADEs) and adjacent reference soils (REF) under old and young forests and monocultures. To better assess taxonomic richness, we used morphology and the barcode region of the COI gene to identify juveniles and cocoons and delimit Molecular Operational Taxonomic Units (MOTUs). Here we suggest using Integrated Operational Taxonomical units (IOTUs) which combine both morphological and molecular data and provide a more comprehensive assessment of diversity, while MOTUs only rely on molecular data. A total of 970 individuals were collected, resulting in 51 taxonomic units (IOTUs, MOTUs, and morphospecies combined). From this total, 24 taxonomic units were unique to REF soils, 17 to ADEs, and ten were shared between both soils. The highest richness was found in old forest sites for ADEs (12 taxonomic units) and REFs (21 taxonomic units). The beta-diversity calculations reveal a high species turnover between ADEs and REF soils, providing evidence that ADEs and REFs possess distinct soil biota. Furthermore, results suggest that ADE sites, formed by Pre-Columbian human activities, conserve a high number of native species in the landscape and maintain a high abundance, despite their long-term nature.
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Oligoquetos , Animais , Humanos , Biodiversidade , Florestas , Solo , AgriculturaRESUMO
The area destined for agricultural production in Paraná state in Brazil is ~6 million hectares, of which 79% are under no-tillage systems (NTS) that can positively affect earthworm populations. Furthermore, earthworm abundance and richness can be valuable soil quality. This study assessed earthworm communities in long-term no-tillage sites (NTS) and nearby secondary Atlantic Forest (SF) fragments. Sampling was performed in June 2018 and May 2019 using the quantitative Tropical Soil Biology and Fertility handsorting method (ISO-TSBF), complemented by qualitative sampling in three municipalities: Faxinal, Mauá da Serra and Palmeira, in NTS and SF. Eleven earthworm species, belonging to five families (Benhamiidae, Glossoscolecidae, Megascolecidae, Ocnerodrilidae, and Rhinodrilidae) were found along with seven native species (Glossoscolex sp.22, Glossoscolex sp.23, Fimoscolex sp.21, Fimoscolex sp.24, Fimoscolex sp.42, Andiorrhinus duseni and Urobenus brasiliensis) and four exotic or cosmopolitan species (Dichogaster gracilis, Amynthas gracilis, Metaphire californica and Pontoscolex corethrurus). The cosmopolitan P. corethrurus dominated Faxinal and Mauá da Serra, while in Palmeira Fimoscolex and Glossoscolex were the most abundant. Six species belonging to Glossoscolex and Fimoscolex were new to science and must be described. Overall, 239 individuals were found. In 2018 126 individuals were found (76 in NTS and 50 in SF) and in 2019, only 112 individuals were found (45 in NTS and 67 in SF). The highest earthworm abundance was in Faxinal (123 individuals), with 76 individuals in NTS and 47 in SF. In Mauá da Serra the same pattern was observed (SF>NTS), while in Palmeira in overall, fewer individuals (38) were collected (24 in NTS and 14 in SF). The NTS at Faxinal and SF Mauá da Serra in 2019 had only/more exotic/cosmopolitan species, while at the other dates and sites >50% of the specimens sampled were native species. Overall, forests had more native species than exotics: in 2018, natives represented > 75% of all specimens, but in 2019 both Faxinal and Mauá da Serra had more exotic species (> 65%), while at Palmeira, they represented 50% of the individuals. Earthworm total biomass for forest sites was higher in Faxinal (3.2 g) and NTS in Mauá da Serra (1.7 g) in 2019. Overall, the total biomass was higher in SF sites than NTS. Using a classification available for earthworm populations in no-tillage systems, all three sites were considered to have poor quality in terms of abundance (ind m-2), while for species richness, they were considered to have moderate (Faxinal and Mauá da Serra) and good quality (Palmeira).
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Oligoquetos , Animais , Brasil , Florestas , Solo , AgriculturaRESUMO
Bacterial, fungal, and parasitic infections increase morbimortality rates and hospital costs. This study aimed to assess the antimicrobial and antiparasitic activities of the crude extract from the seeds and peel of the pepper Capsicum chinense Jacq. and of the isolated compound capsaicin and to evaluate their ability to inhibit biofilm formation, eradicate biofilm, and reduce hemolysin production by Candida species. The crude ethanolic and hexane extracts were obtained by maceration at room temperature, and their chemical compositions were analyzed by liquid chromatography coupled to mass spectrometry (LC-MS). The antimicrobial activity of the samples was evaluated by determining the minimum inhibitory concentration. Inhibition of biofilm formation and biofilm eradication by the samples were evaluated based on biomass and cell viability. Reduction of Candida spp. hemolytic activity by the samples was determined on sheep blood agar plates. The antiparasitic action of the samples was evaluated by determining their ability to inhibit Toxoplasma gondii intracellular proliferation. LC-MS-ESI analyses helped to identify organic and phenolic acids, flavonoids, capsaicinoids, and fatty acids in the ethanolic extracts, as well as capsaicinoids and fatty acids in the hexane extracts. Antifungal action was more evident against C. glabrata and C. tropicalis. The samples inhibited biofilm formation and eradicated the biofilm formed by C. tropicalis more effectively. Sub-inhibitory concentrations of the samples significantly reduced the C. glabrata and C. tropicalis hemolytic activity. The samples only altered host cell viability when tested at higher concentrations; however, at non-toxic concentrations, they reduced T. gondii growth. In association with gold standard drugs used to treat toxoplasmosis, capsaicin improved their antiparasitic activity. These results are unprecedented and encouraging, indicating the Capsicum chinense Jacq. peel and seed extracts and capsaicin display antifungal and antiparasitic activities.
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OBJECTIVE: This study aimed (i) to evaluate the antibacterial and cytotoxic activities of the crude extract and fractions obtained from Euclea natalensis A.D.C. roots against bacteria that cause periodontal disease and caries and (ii) to identify the isolated compounds. DESIGN: The minimum inhibitory concentration (MIC) and the minimum bactericidal concentration (MBC) of the extract and fractions were determined by the microplate dilution assay. The cytotoxicity of the extract and fractions was evaluated by using the XTT colorimetric assay and normal human fibroblast cells (GM07492A, lung fibroblasts). The compounds present in the most promising fraction were determined by qualitative analysis through liquid chromatography coupled to mass spectrometry (HPLC-MS-ESI). RESULTS: The MIC results ranged from 25 to > 400 µg/mL for the extract and from 1.56 to > 400 µg/mL for the fractions. To evaluate cytotoxicity, the tested concentrations of the extract and fractions ranged from 19.5 to 2500 µg/mL; IC50 values between 625 and 1250 µg/mL were obtained. Analysis of the main bioactive fraction by HPLC-MS-ESI identified phenolic acids, coumarins, naphthoquinones, lignans, and fatty acids. CONCLUSIONS: The E. natalensis root extract and fractions displayed good antibacterial activity against periodontal pathogenic and cariogenic bacteria. The antibacterial activity may be due to compounds present in the extract and fractions, which also showed low cytotoxicity to normal human cells. These data are relevant and encourage further research into this plant species, which may contribute to the discovery of new herbal medicines that will help to mitigate the problems caused by oral pathogenic bacteria.
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Ebenaceae , Lignanas , Naftoquinonas , Antibacterianos/química , Bactérias , Cumarínicos , Ácidos Graxos , Humanos , Testes de Sensibilidade Microbiana , Naftoquinonas/farmacologia , Extratos Vegetais/químicaRESUMO
The Food Choice Questionnaire (FCQ) was applied to assess the motivations for daily food choices and associated factors in a Brazilian sample. Data were collected from January to July 2019 from 525 individuals over 18 years old recruited face-to-face in different places (e.g., university, public squares, health posts), using a convenient, intentional, and reasoned sampling. In addition to the FCQ, socioeconomic data were collected from printed questionnaires. Answers were given using a seven-point scale, ranging from (1) strongly disagree to (7) strongly agree. After Confirmatory factor analysis led to the rejection of the original FCQ structure, exploratory factor analysis was performed. Eight factors were extracted and named: nutritional composition, mood, health, sensory appeal, price, preparation convenience, familiarity, and purchase convenience. Other analyses were performed and led to a previously published discussion about food choice criteria hierarchy and associated factors. Researchers and practitioners can further use data from this survey in science and practice. These data can be useful for product development, nutritional counseling, and public health policies development. Furthermore, the FCQ is a widely used instrument, and comparisons between results obtained in different samples can bring meaningful contributions to the study of consumer behavior.
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INTRODUCTION: The search for an animal model capable of reproducing the physiopathology of the COVID-19, and also suitable for evaluating the efficacy and safety of new drugs has become a challenge for many researchers. AREAS COVERED: This work reviews the current animal models for in vivo tests with SARS-CoV-2 as well as the challenges involved in the safety and efficacy trials. EXPERT OPINION: Studies have reported the use of nonhuman primates, ferrets, mice, Syrian hamsters, lagomorphs, mink, and zebrafish in experiments that aimed to understand the course of COVID-19 or test vaccines and other drugs. In contrast, the assays with animal hyperimmune sera have only been used in in vitro assays. Finding an animal that faithfully reproduces all the characteristics of the disease in humans is difficult. Some models may be more complex to work with, such as monkeys, or require genetic manipulation so that they can express the human ACE2 receptor, as in the case of mice. Although some models are more promising, possibly the use of more than one animal model represents the best scenario. Therefore, further studies are needed to establish an ideal animal model to help in the development of other treatment strategies besides vaccines.
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COVID-19 , SARS-CoV-2 , Animais , Cricetinae , Modelos Animais de Doenças , Furões , Humanos , Camundongos , Peixe-ZebraRESUMO
We used the recombinant trimeric spike (S) glycoprotein in the prefusion conformation to immunize horses for the production of hyperimmune globulins against SARS-CoV-2. Serum antibody titers measured by ELISA were above 1:106, and the neutralizing antibody titer against authentic virus (WT) was 1:14,604 (average PRNT90). Plasma from immunized animals was pepsin digested to remove the Fc portion and purified, yielding an F(ab')2 preparation with PRNT90 titers 150-fold higher than the neutralizing titers in human convalescent plasma. Challenge studies were carried out in hamsters and showed the in vivo ability of equine F(ab')2 to reduce viral load in the pulmonary tissues and significant clinical improvement determined by weight gain. The neutralization curve by F(ab')2 was similar against the WT and P.2 variants, but displaced to higher concentrations by 0.39 log units against the P.1 (Gamma) variant. These results support the possibility of using equine F(ab')2 preparation for the clinical treatment of COVID patients.
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Cercospora brachiata is a phytopathogenic fungus. To know more about the metabolites produced by this fungus, the objective of this work was to identify, isolate and characterize substances present in extracts of the growth broth and mycelium, using gas chromatography with mass spectrometry (GC-MS) and nuclear magnetic resonance (NMR). It was also objective to evaluate the antibacterial activity of the extracts. Among the compounds identified, fatty acids, esters, and steroids can be highlighted. The main compounds identified are 9-hexadecenoic, hexadecenoic, oleic, octadecanoic, lauric, myristic, palmitic, doceno-13-enoic, stearic, linoleic, and nonadecanoic acids present in almost all extracts. For the antibacterial activity, the broth microdilution method was used. The ethyl acetate extract of the mycelium presented inhibitory concentrations (MICs) against the bacterium Actinomyces naeslundii (100 µg mL-1) and Streptococcus sanguinis (200 µg mL-1). Finally, two steroids were isolated and identified in the hexane extract of mycelium: ergosta-6,22-dien-3ß,5α,8α-triol and brassicasterol.
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OBJECTIVE: To evaluate the effectiveness of an intervention program in practices and behaviors of a health team to prevent falls in hos pitalized elderly people. METHOD: This was an action, mixed-methods, and longitudinal study that applied an intervention based on TeamSTEPPS®, and organized into five domains: team training, communication, leadership, monitoring, and mutual support. The population was nurses and nursing aides who worked at the medical service of a Portuguese hospital center. Data were obtained by consulting process records and interviews, and by applying the Scale of Practices and Behaviors of Teams for Fall Prevention. RESULTS: There was improvement in all indicators of the scale, with evident progress in discussion of risk factors and preventive measures to be implemented. CONCLUSION: This intervention promoted decision-making regarding the preventive measures to be applied to each elderly person and improved communication and the interest in identifying the causes of falls to prevent their recurrence.
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Assistentes de Enfermagem , Idoso , Comunicação , Humanos , Liderança , Estudos Longitudinais , Avaliação de Programas e Projetos de SaúdeRESUMO
Amazonian rainforests, once thought to be pristine wilderness, are increasingly known to have been widely inhabited, modified, and managed prior to European arrival, by human populations with diverse cultural backgrounds. Amazonian Dark Earths (ADEs) are fertile soils found throughout the Amazon Basin, created by pre-Columbian societies with sedentary habits. Much is known about the chemistry of these soils, yet their zoology has been neglected. Hence, we characterized soil fertility, macroinvertebrate communities, and their activity at nine archeological sites in three Amazonian regions in ADEs and adjacent reference soils under native forest (young and old) and agricultural systems. We found 673 morphospecies and, despite similar richness in ADEs (385 spp.) and reference soils (399 spp.), we identified a tenacious pre-Columbian footprint, with 49% of morphospecies found exclusively in ADEs. Termite and total macroinvertebrate abundance were higher in reference soils, while soil fertility and macroinvertebrate activity were higher in the ADEs, and associated with larger earthworm quantities and biomass. We show that ADE habitats have a unique pool of species, but that modern land use of ADEs decreases their populations, diversity, and contributions to soil functioning. These findings support the idea that humans created and sustained high-fertility ecosystems that persist today, altering biodiversity patterns in Amazonia.
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Ecossistema , Solo , Agricultura , Biodiversidade , Humanos , Microbiologia do SoloRESUMO
This study aimed to assess consumers' perceptions about the impact of consumption of different foods on health and body weight, as well as to identify risk perceptions about food-related chronic diseases. Face-to-face questionnaires were conducted with 525 Brazilians. Individuals were asked about their perception of risks associated with the consumption of 50 food items on health and bodyweight. The unrealistic optimism was measured by asking participants about their risk and the risk of another person with similar body and health conditions of developing diabetes mellitus (DM), systemic arterial hypertension (SAH), and gaining 3 to 10 kg in the next 12 months. According to the principal component analysis, biased perception of food healthiness and weight gain was observed. Some UPF were perceived as healthy (e.g., gelatin, cereal bars, cream cracker), indicating a false healthy stereotype. Regarding the bodyweight effect, some typical Brazilian staple foods, such as rice, pasta, bread, and potatoes, were considered fattening foods. Optimistic bias was found for DM, SAH, and weight gain, and perceived control over health correlated negatively to risk perception of all hazards. Some motives for food choice and perceptions about foods affected the risk perception about chronic disease. Consumers with higher income, highly educated, and without children perceive higher health benefits in food than risks. These results indicate that health campaigns must be unbiased, clarifying the level of food processing and health effects, especially for the food stereotyped as healthy and fattening.
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Manipulação de Alimentos , Preferências Alimentares , Brasil , Criança , Doença Crônica , Humanos , PercepçãoRESUMO
With the growing global concern on pesticide management, the relationship between its environmental recalcitrance, food security and human health has never been more relevant. Pesticides residues are known to cause significant environmental contamination. Here, we present a case study on long-term no-tillage farming systems in Brazil, where Glyphosate (GLY) has been applied for more than 35 years. GLY and its main breakdown product, aminomethylphosphonic acid (AMPA) were determined in topsoil (0-10 cm) samples from no-tillage fields and nearby subtropical secondary forests by high-performance liquid chromatography coupled with a fluorescence detector. In addition, the presence of carbamates, organochlorines, organophosphates and triazines were also screened for. GLY and AMPA were present in all soil samples, reaching values higher than those described for soils so far in the literature. A significant decrease for AMPA was observed only between the secondary forest and the farm's middle slope for site B. GLY and AMPA were observed respectively at peak concentrations of 66.38 and 26.03 mg/kg soil. GLY was strongly associated with forest soil properties, while AMPA associated more with no-tillage soil properties. Soil texture was a significant factor contributing to discrimination of the results as clay and sand contents affect GLY and AMPA retention in soils. This was the first study to report DDT and metabolites in consolidated no-tillage soils in Brazil (a pesticide fully banned since 2009). Based on human risk assessment conducted herein and the potential risk of GLY to local soil communities, this study offers a baseline for future studies on potential adverse effects on soil biota, and mechanistic studies.
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We evaluated the safety, optimal dose, and preliminary effectiveness of a new-approach Africanized honeybee (Apis mellifera) Antivenom (AAV) in a phase I/II, multicenter, non-randomized, single-arm clinical trial involving 20 participants with multiple stings. Participants received 2 to 10 vials of AAV depending on the number of stings they suffered, or a predefined adjuvant, symptomatic, and complementary treatment. The primary safety endpoint was the occurrence of early adverse reactions within the first 24 h of treatment. Preliminary efficacy based on clinical evolution, including laboratory findings, was assessed at baseline and at various time points over the four following weeks. ELISA assays and mass spectrometry were used to estimate venom pharmacokinetics before, during, and after treatment. Twenty adult participants, i.e., 13 (65%) men and 7 (35%) women, with a median age of 44 years and a mean body surface area of 1.92 m2 (median = 1.93 m2) were recruited. The number of stings ranged from 7 to > 2,000, with a median of 52.5. Symptoms of envenoming were classified as mild, moderate, or severe in 80% (16), 15% (3), and 5% (1) of patients, respectively; patients with mild, moderate, or severe envenoming received 2, 6, and 10 vials of AAV as per the protocol. None of the patients had late reactions (serum sickness) within 30 d of treatment. There was no discontinuation of the protocol due to adverse events, and there were no serious adverse events. One patient had a moderate adverse event, transient itchy skin, and erythroderma. All participants completed the intravenous antivenom infusion within 2 h, and there was no loss to follow-up after discharge. ELISA assays showed venom (melittin and PLA2) concentrations varying between 0.25 and 1.479 ng/mL prior to treatment. Venom levels decreased in all patients during the hospitalization period. Surprisingly, in nine cases (45%), despite clinical recovery and the absence of symptoms, venom levels increased again during outpatient care 10 d after discharge. Mass spectrometry showed melittin in eight participants, 30 d after treatment. Considering the promising safety results for this investigational product in the treatment of massive Africanized honeybee attack, and its efficacy, reflected in the clinical improvements and corresponding immediate decrease in blood venom levels, the AAV has shown to be safe for human use. Clinical Trial Registration: UTN: U1111-1160-7011, identifier [RBR-3fthf8].
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Antivenenos/administração & dosagem , Venenos de Abelha/antagonistas & inibidores , Abelhas/imunologia , Mordeduras e Picadas de Insetos/terapia , Adulto , Idoso , Animais , Antivenenos/efeitos adversos , Venenos de Abelha/sangue , Brasil , Feminino , Humanos , Mordeduras e Picadas de Insetos/sangue , Mordeduras e Picadas de Insetos/diagnóstico , Mordeduras e Picadas de Insetos/imunologia , Masculino , Pessoa de Meia-Idade , Índice de Gravidade de Doença , Resultado do Tratamento , Adulto JovemRESUMO
Massive, Africanized honeybee attacks have increased in Brazil over the years. Humans and animals present local and systemic effects after envenomation, and there is no specific treatment for this potentially lethal event. This study evaluated the ability of a new Apilic antivenom, which is composed of F(ab')2 fraction of specific immunoglobulins in heterologous and hyperimmune equine serum, to neutralize A. mellifera venom and melittin, in vitro and in vivo, in mice. Animal experiments were performed in according with local ethics committee license (UFRJ protocol no. DFBCICB072-04/16). Venom dose-dependent lethality was diminished with 0.25-0.5 µL of intravenous Apilic antivenom/µg honeybee venom. In vivo injection of 0.1-1 µg/g bee venom induced myotoxicity, hemoconcentration, paw edema, and increase of vascular permeability which were antagonized by Apilic antivenom. Cytotoxicity, assessed in renal LLC-PK1 cells and challenged with 10 µg/mL honeybee venom or melittin, was neutralized by preincubation with Apilic antivenom, as well the hemolytic activity. Apilic antivenom inhibited phospholipase and hyaluronidase enzymatic activities. In flow cytometry experiments, Apilic antivenom neutralized reduction of cell viability due to necrosis by honeybee venom or melittin. These results showed that this antivenom is effective inhibitor of honeybee venom actions. Thus, this next generation of Apilic antivenom emerges as a new promising immunobiological product for the treatment of massive, Africanized honeybee attacks.
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Antivenenos/uso terapêutico , Venenos de Abelha/antagonistas & inibidores , Mordeduras e Picadas/tratamento farmacológico , Meliteno/antagonistas & inibidores , Animais , Anticorpos/sangue , Abelhas , Brasil , Linhagem Celular , Sobrevivência Celular , Relação Dose-Resposta a Droga , Avaliação Pré-Clínica de Medicamentos , Feminino , Hemólise/efeitos dos fármacos , Cavalos , Hialuronoglucosaminidase/antagonistas & inibidores , Fragmentos Fab das Imunoglobulinas/uso terapêutico , Injeções Intradérmicas , Células LLC-PK1 , Dose Letal Mediana , Masculino , Camundongos , Modelos Animais , Testes de Neutralização , Fosfolipases/antagonistas & inibidores , SuínosRESUMO
Since the very beginning of the COVID-19 pandemic, different treatment strategies have been explored. These mainly involve the development of antimicrobial, antiviral, and/or anti-inflammatory agents as well as vaccine production. However, other potential options should be more avidly investigated since vaccine production on a worldwide level, and the anti-vaccination movement, also known as anti-vax or vaccine hesitancy by many communities, are still real obstacles without a ready solution. This review presents recent findings on the potential therapeutic advantages of heterologous serotherapy for the treatment of COVID-19. We present not only the effective use in animal models of hyperimmune sera against this coronavirus but also strategies, and protocols for the production of anti-SARS-CoV-2 sera. Promising antigens are also indicated such as the receptor-binding domain (RBD) in SARS-CoV-2 S protein, which is already in phase 2/3 clinical trial, and the trimeric protein S, which was shown to be up to 150 times more potent than the serum from convalescent donors. Due to the high death rate, the treatment for those currently infected with coronavirus cannot be ignored. Therefore, the potential use of anti-SARS-CoV-2 hyperimmune sera should be carefully but urgently evaluated in phase 2/3 clinical studies.
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COVID-19/terapia , SARS-CoV-2 , Animais , Humanos , Imunização Passiva , Soroterapia para COVID-19RESUMO
ABSTRACT Objective: To evaluate the effectiveness of an intervention program in practices and behaviors of a health team to prevent falls in hos pitalized elderly people. Method: This was an action, mixed-methods, and longitudinal study that applied an intervention based on TeamSTEPPS®, and organized into five domains: team training, communication, leadership, monitoring, and mutual support. The population was nurses and nursing aides who worked at the medical service of a Portuguese hospital center. Data were obtained by consulting process records and interviews, and by applying the Scale of Practices and Behaviors of Teams for Fall Prevention. Results: There was improvement in all indicators of the scale, with evident progress in discussion of risk factors and preventive measures to be implemented. Conclusion: This intervention promoted decision-making regarding the preventive measures to be applied to each elderly person and improved communication and the interest in identifying the causes of falls to prevent their recurrence.
RESUMEN Objetivo: Evaluar la eficacia de un programa de intervención en prácticas y conductas del equipo de salud para prevenir caídas de ancianos hospitalizados. Método: Estudio de investigación-acción, mixto y longitudinal, con aplicación de una intervención basada en el "TeamSTEPPS®", organizada en cinco dominios: formación del equipo, comunicación, liderazgo, monitoreo y soporte mutuo. Población constituida por enfermeros y auxiliares de un servicio de medicina en un centro hospitalario portugués. Datos obtenidos mediante consulta de los procesos, entrevistas y aplicación de escala de evaluación de las prácticas y conductas de los equipos en la gestión del riesgo de caída en ancianos. Resultados: Los resultados de la aplicación de la escala de prácticas y conductas de los equipos en la gestión del riesgo de caída de los ancianos apuntan a una mejora en todos sus indicadores, claramente expresada en la discusión de factores de riesgo y medidas preventivas a implementarse. Conclusión: La intervención promueve la toma de decisiones sobre medidas preventivas a aplicarse con cada anciano, mejora la comunicación y el interés en identificar las causas de caída para prevenir su reiteración.
RESUMO Objetivo: Avaliar a eficácia de um programa de intervenção nas práticas e comportamentos da equipe de saúde para prevenir a queda a idosos hospitalizados. Método: Estudo de investigação-ação, misto e longitudinal, com aplicação de uma intervenção baseada no "TeamSTEPPS®", organizada em cinco domínios: formação da equipe, comunicação, liderança, monitorização e suporte mútuo. A população foi constituída por enfermeiros e auxiliares de um serviço de medicina de um centro hospitalar português. Os dados foram obtidos por consulta aos processos, entrevistas e pela aplicação da escala de avaliação das práticas e comportamentos das equipes na gestão do risco de quedas de idosos. Resultados: Os resultados da aplicação da escala de práticas e comportamentos das equipes na gestão do risco de queda dos idosos apontam para uma melhoria em todos os indicadores dessa escala, com claras melhorias na discussão dos fatores de risco e das medidas preventivas a implementar. Conclusão: A intervenção promove a tomada de decisão sobre as medidas preventivas a serem aplicadas a cada idoso, melhora a comunicação e o interesse em identificar as causas de quedas, para prevenir a sua recorrência.
Assuntos
Acidentes por Quedas , Idoso , Hospitalização , Equipe de Assistência ao Paciente , Enfermagem GeriátricaRESUMO
We evaluated the safety, optimal dose, and preliminary effectiveness of a new-approach Africanized honeybee (Apis mellifera) Antivenom (AAV) in a phase I/II, multicenter, non-randomized, single-arm clinical trial involving 20 participants with multiple stings. Participants received 2 to 10 vials of AAV depending on the number of stings they suffered, or a predefined adjuvant, symptomatic, and complementary treatment. The primary safety endpoint was the occurrence of early adverse reactions within the first 24 h of treatment. Preliminary efficacy based on clinical evolution, including laboratory findings, was assessed at baseline and at various time points over the four following weeks. ELISA assays and mass spectrometry were used to estimate venom pharmacokinetics before, during, and after treatment. Twenty adult participants, i.e., 13 (65%) men and 7 (35%) women, with a median age of 44 years and a mean body surface area of 1.92 m2 (median = 1.93 m2) were recruited. The number of stings ranged from 7 to > 2,000, with a median of 52.5. Symptoms of envenoming were classified as mild, moderate, or severe in 80% (16), 15% (3), and 5% (1) of patients, respectively; patients with mild, moderate, or severe envenoming received 2, 6, and 10 vials of AAV as per the protocol. None of the patients had late reactions (serum sickness) within 30 d of treatment. There was no discontinuation of the protocol due to adverse events, and there were no serious adverse events. One patient had a moderate adverse event, transient itchy skin, and erythroderma. All participants completed the intravenous antivenom infusion within 2 h, and there was no loss to follow-up after discharge. ELISA assays showed venom (melittin and PLA2) concentrations varying between 0.25 and 1.479 ng/mL prior to treatment. Venom levels decreased in all patients during the hospitalization period. Surprisingly, in nine cases (45%), despite clinical recovery and the absence of symptoms, venom levels increased again during outpatient care 10 d after discharge. Mass spectrometry showed melittin in eight participants, 30 d after treatment. Considering the promising safety results for this investigational product in the treatment of massive Africanized honeybee attack, and its efficacy, reflected in the clinical improvements and corresponding immediate decrease in blood venom levels, the AAV has shown to be safe for human use. Clinical Trial Registration: UTN: U1111-1160-7011, identifier [RBR-3fthf8].
RESUMO
As infecções virais que acometem o fígado são denominadas hepatites e, geralmente, podem ter cinco etiologias, desde o vírus A ao vírus E. As manifestações clínicas dependem do tipo viral, assim como variam de acordo com a etiologia das doenças, sendo assim, conhecer esses dados é necessário para compreender as variáveis das áreas afetadas. Este artigo visa comparar os dados disponíveis nos sistemas de informações on-line do governo brasileiro. Foi constatada a necessidade de atualização do banco de dados, tendo em vista sua importância para produção científica e elaboração de ações. Este é um estudo transversal, baseado no Departamento de Informática do Sistema Único de Saúde (Datasus) e em documentos oficiais do governo brasileiro, como os boletins epidemiológicos. Foram incluídos aqueles que citaram informações de incidência e/ou prevalência e/ou continham suas relações com características sociais, econômicas ou culturais, com retrospecto de até cinco anos. Entre os resultados, a transmissão das hepatites por via sexual é a predominante no Brasil, assim como foi predominante em todos os estados. O segundo lugar foi variável, sendo no Sul e Sudeste o uso de drogas injetáveis, enquanto no Norte, Nordeste e Centro-Oeste predominou a contaminação por água e alimentos. Contraditoriamente, a hepatite C predomina nas regiões Sul e Sudeste, enquanto nas demais predomina a hepatite B. Compreender os fatores individuais de cada região pode provir o estudo da base de dados, inclusive sendo importante ação de prevenção e promoção da saúde.
Hepatitis refers to viral infections that affect the liver and can usually present five etiologies, from virus A to virus E. The clinical manifestations depend on the viral type, which varies according to the disease etiology. Know these data is therefore necessary to understand the variables of the affected areas. Hence, this article compares the data available in the Brazilian government's online information systems. The database requires updating given its importance for scientific production and policy development. This is a cross-sectional study based on the SUS Informatics Department (DATASUS) and on official documents, such as the epidemiological bulletins. Documents which cited incidence and/or prevalence information and/or contained their relation to social, economic, or cultural characteristics, with a retrospective of up to 5 years, were included. Results show that sexually transmitted Hepatitis predominates in Brazil, as is prevalent in all states. The second place varied: while injecting drug use are prevalent in the South and Southeast, water and food contamination predominate in the North, Northeast, and Midwest. Contradictorily, hepatitis C predominates in the South and Southeast regions, while hepatitis B is prevalent in the remaining ones. Understanding the individual factors of each region can derive from studying the database, including being an important action for prevention and health promotion.
Las infecciones virales que afectan al hígado se denominan hepatitis y, generalmente, pueden tener cinco etiologías desde el virus A hasta el virus E. Teniendo en cuenta que las manifestaciones clínicas van a depender del tipo viral, así como también varían de acuerdo con la etiología de las enfermedades, conocer estos datos son necesarios para comprender las variables de las áreas afectadas. Este artículo pretende comparar los datos disponibles en los sistemas de información online del gobierno brasileño. Se percibió la necesidad de actualizar esa base de datos para demostrar su importancia para la producción científica y elaboración de acciones. Este es un estudio transversal, basado en el Departamento de Informática del Sistema Único de Salud (DATASUS) y los documentos oficiales del gobierno brasileño, como los boletines epidemiológicos. Se incluyeron aquellos que citaron informaciones de incidencia y/o prevalencia y/o contenían sus relaciones con características sociales, económicas o culturales con retrospección de hasta cinco años. Entre las hepatitis, la transmisión por vía sexual es la predominante en Brasil, en todos los estados. El segundo lugar fue variable siendo en el Sur y Sudeste el uso de drogas inyectables, mientras que en el Norte, Nordeste y Centro-Oeste predominaron la contaminación a través de agua y alimentos. En contraste, la hepatitis C predomina en las regiones Sur y Sudeste, mientras que en las demás regiones es predominante la hepatitis B. Comprender los factores individuales de cada región puede ayudar el estudio de la base de datos, inclusive es una importante acción de prevención y promoción de la salud.