The good, the bad and the boa: An unexpected new species of a true boa revealed by morphological and molecular evidence.

Snakes of the genus Boa are outstanding elements of the New World biota with a broad sociological influence on pop culture. Historically, several taxa have been recognized in the past 300 years, being mostly described in the early days of binomial nomenclature. As a rule, these taxa were recognized based on a suite of phenotypic characters mainly those from the external morphology. However, there is a huge disagreement with respect to the current taxonomy and available molecular phylogenies. In order to reconcile both lines of evidence, we investigate the phylogenetic reconstruction (using mitochondrial and nuclear genes) of the genus in parallel to the detailed study of some phenotypic systems from a geographically representative sample of the cis-Andean mainland Boa constrictor. We used cyt-b only (744bp) from 73 samples, and cyt-b, ND4, NTF3, and ODC partial sequences (in a total of 2305 bp) from 35 samples, comprising nine currently recognized taxa (species or subspecies), to infer phylogenetic relationships of boas. Topologies recovered along all the analyses and genetic distances obtained allied to a unique combination of morphological traits (colouration, pholidosis, meristic, morphometric, and male genitalia features) allowed us to recognize B. constrictor lato sensu, B. nebulosa, B. occidentalis, B. orophias and a distinct lineage from the eastern coast of Brazil, which we describe here as a new species, diagnosing it from the previously recognized taxa. Finally, we discuss the minimally necessary changes in the taxonomy of Boa constrictor complex; the value of some usually disregarded phenotypic character system; and we highlight the urgency of continuing environmental policy to preserve one of the most impacted Brazilian hotspots, the Atlantic Forest, which represents an ecoregion full of endemism.

The Expression Levels of TREX1 and IFN-α Are Associated with Immune Reconstitution in HIV-1-Infected Individuals.

TREX1 acts in the initial prevention of an autoimmune response, but it may contribute to the permissiveness of retrovirus infections. This study investigated the association between the levels of TREX1 gene expression with the polymorphisms TREX1 rs3135941 (T/C) and TREX1 rs3135945 (G/A), and the presence of antinuclear antibodies (ANA) in antiretroviral therapy (ART)-naïve individuals and after 1 year of treatment. Blood samples from 119 individuals with HIV-1 were subjected to genotyping of polymorphisms and quantification of TREX1 gene expression and HIV-1 viral load by qPCR. The concentration of IFN-α and the number of CD4+/CD8+ T lymphocytes were determined by ELISA and flow cytometry, respectively; ANA was investigated by immunofluorescence. A control group of 167 seronegative individuals was used for the comparison of genotypic frequencies. The frequency of the polymorphisms were not associated with HIV infection or with variations in the expression of TREX1 and IFN-α (p > 0.05). ART-naïve individuals exhibited higher TREX1 expression and lower IFN-α expression. After 1 year of ART, TREX1 levels were reduced, while IFN-α and CD4+ T lymphocytes were elevated (p < 0.05). Some individuals on ART presented ANA. These results suggest that ART-mediated restoration of immune competence is associated with a reduction in TREX1 expression, which may induce the development of ANA, regardless of the polymorphism investigated.

The good, the bad and the boa: an unexpected new species of a true boa revealed by morphological and molecular evidence

Snakes of the genus Boa are outstanding elements of the New World biota with a broad sociological influence on pop culture. Historically, several taxa have been recognized in the past 300 years, being mostly described in the early days of binomial nomenclature. As a rule, these taxa were recognized based on a suite of phenotypic characters mainly those from the external morphology. However, there is a huge disagreement with respect to the current taxonomy and available molecular phylogenies. In order to reconcile both lines of evidence, we investigate the phylogenetic reconstruction (using mitochondrial and nuclear genes) of the genus in parallel to the detailed study of some phenotypic systems from a geo graphically representative sample of the cis-Andean mainland Boa constrictor. We used cyt b only (744bp) from 73 samples, and cyt-b, ND4, NTF3, and ODC partial sequences (in a total of 2305 bp) from 35 samples, comprising nine currently recognized taxa (species or subspecies), to infer phylogenetic relationships of boas. Topologies recovered along all the analyses and genetic distances obtained allied to a unique combination of morphological traits (colouration, pholidosis, meristic, morphometric, and male genitalia features) allowed us to recognize B. constrictor lato sensu, B. nebulosa, B. occidentalis, B. orophias and a dis tinct lineage from the eastern coast of Brazil, which we describe here as a new species, diagnosing it from the previously recognized taxa. Finally, we discuss the minimally neces sary changes in the taxonomy of Boa constrictor complex; the value of some usually disre garded phenotypic character system; and we highlight the urgency of continuing environmental policy to preserve one of the most impacted Brazilian hotspots, the Atlantic Forest, which represents an ecoregion full of endemism.

Risco de Desenvolvimento de Lesão em Decorrência de Posicionamento Cirúrgico: Estudo Observacional / Risk of Injury Development Due to Surgical Positioning: an Observational Study / Riesgo de Desarrollo de Lesiones Debido al Posicionamiento Quirúrgico: Estudio Observacional

Objetivo:Classificar o risco de desenvolvimento de lesão por posicionamento cirúrgico. Método: Estudo observacional, longitudinal, prospectivo, de abordagem quantitativa realizado em hospital público, com 135 pacientes submetidos à cirurgia eletiva. Utilizaram-se instrumentos contendo caracterização sociodemográfica, clínica e cirúrgica e escala de avaliação de risco para desenvolvimento de lesões decorrentes do posicionamento cirúrgico. Empregaram-se análise descritiva, teste exato de Fisher ou teste χ2 e a medida de associação odds ratio, conforme apropriado. Resultados: A maioria dos participantes era do sexo masculino (51,11%), adulta (52,59%) e foi classificada como maior risco para o desenvolvimento de lesões por posicionamento cirúrgico (51,85%). Ser idoso, hipertensão, diabetes mellitus e cirurgias urológicas foram estatisticamente significativos (p < 0,05) para maior risco de desenvolvimento de lesões. A incidência de lesão por pressão foi de 0,74%, com observação apenas na região sacra. Conclusão: Verificou-se maior risco para desenvolvimento de lesão em decorrência do posicionamento cirúrgico e baixa incidência de lesão por pressão. A enfermagem perioperatória deve incorporar à prática assistencial ferramentas validadas de mensuração de risco para um cuidado seguro, individualizado e de qualidade aos pacientes cirúrgicos.

Objective:To classify the risk of developing injury due to surgical positioning. Method: Observational, longitudinal, prospective study with a quantitative approach carried out in a public hospital, with 135 patients undergoing elective surgery. Instruments containing sociodemographic, clinical, and surgical characteristics and a risk assessment scale for the development of injuries due to surgical positioning were used. Descriptive analysis, Fisher's exact test or χ2 test and odds ratio association measure were used as appropriate. Results: Most participants were male (51.11%), adults (52.59%) and were classified as having a higher risk for developing injuries due to surgical positioning (51.85%). Elderly, hypertension, diabetes mellitus and urological surgeries were statistically significant (p < 0.05) for a higher risk of developing lesions. The incidence of pressure injuries was 0.74%, with observation only in the sacral region. Conclusion: There was a greater risk of developing lesions due to surgical positioning and low incidence of pressure injury. Perioperative nursing should incorporate validated risk measurement tools into care practice for safe, individualized and quality care for surgical patients,

Objetivo:Clasificar el riesgo de desarrollar lesión por posicionamiento quirúrgico. Método: Estudio observacional, longitudinal, prospectivo, con abordaje cuantitativo, realizado en un hospital público, con 135 pacientes sometidos a cirugía electiva. Se utilizaron instrumentos que contenían características sociodemográficas, clínicas y quirúrgicas y una Escala de Evaluación de Riesgo para el Desarrollo de Lesiones por Posicionamiento Quirúrgico. Se utilizó el análisis descriptivo, la prueba exacta de Fisher, o chi-cuadrado y la medida de asociación odds ratio, según corresponda. Resultados: La mayoría de los participantes eran hombres (51,11 %), adultos (52,59 %) y se clasificaron con mayor riesgo de desarrollar lesiones debido al posicionamiento quirúrgico (51,85 %). Ancianos, hipertensión, diabetes mellitus y cirugías urológicas fueron estadísticamente significativos (p ˂ 0,05) para mayor riesgo de desarrollar lesiones. La incidencia de lesiones por presión fue del 0,74%, observándose solo en la región sacra. Conclusión: Hubo un mayor riesgo de desarrollar lesiones debido al posicionamiento quirúrgico y una baja incidencia de lesión presión. La enfermería perioperatoria debe incorporar herramientas validadas de medición del riesgo en la práctica asistencial para una atención segura, individualizada y de calidad a los pacientes quirúrgicos.

Needle visualization during ultrasound-guided puncture: image optimization.

Background: Obtaining an adequate image of the needle by ultrasound reduces complications resulting from punctures, increasing patient safety and reducing hospitalization costs. Objectives: To verify human perception in relation to number of pixels, while also identifying the best puncture angle and which needle should be used, and to evaluate whether there is a difference if needle visualization software is used. Methods: 20 images were analyzed by 103 students who classified them as being sufficient or insufficient and were compared with the quality observed using photoshop. We evaluated whether there were differences between puncture angles of less than 45º and more than 45º, between IV catheter and introducer needles, and between images obtained with and without visualization software. Results: There was a higher percentage of sufficient ratings for images those that had more than 60 pixels and when the puncture angle was less than 45º, with significant associations between students' evaluations and each of these groups (p < 0.001). The percentages of images classified as sufficient were higher for images in which a IV catheter was used and also higher for those using the needle visualization software, with significant associations between the results for students' classifications and each of these groups (p < 0.001). Conclusions: The human eye classifies an image as sufficient according to higher numbers of pixels. Images of punctures at angles smaller than 45º in relation to the surface, of punctures performed with a IV catheter, and when using specific visualization software are also better detected by the human eye.

Contexto: A obtenção de uma imagem adequada da agulha pelo ultrassom diminui complicações decorrentes de punções, trazendo segurança para os pacientes e diminuindo custos com hospitalização. Objetivos: Verificar a percepção do olho humano em relação aos pixels, identificar qual o melhor ângulo da punção e qual agulha deve ser utilizada e avaliar se há diferença com o uso de software de visualização de agulha. Métodos: Vinte imagens foram analisadas por 103 alunos, que as classificaram como sendo suficientes ou insuficientes, e comparadas com a qualidade observada pelo photoshop. Avaliou-se se havia diferença entre punções com menos de 45º e mais de 45º, entre cateter EV e agulha introdutora e entre imagens obtidas com e sem software de visualização. Resultados: Houve um percentual mais elevado de imagens suficientes entre aquelas que tinham mais de 60 pixels e quando o ângulo era menor que 45º, com associação significativa entre a classificação das avaliações pelos alunos e cada um desses grupos (p < 0,001). O percentual de imagens suficientes foi maior nas imagens realizadas com cateter EV e naquelas que utilizaram o software de visualização da agulha, ocorrendo associação significativa entre os resultados da classificação pelos alunos e cada um desses grupos (p < 0,001). Conclusões: O olho humano classifica a imagem como sendo suficiente de acordo com a maior quantidade de pixels. Imagens puncionadas com ângulos menores que 45º em relação à superfície, realizadas com cateter EV e utilizando software específico de visualização também são mais bem detectadas pelo olho humano.

Persistence of a carbapenem-resistant Acinetobacter baumannii (CRAB) International Clone II (ST2/IC2) sub-lineage involved with outbreaks in two Brazilian clinical settings.

BACKGROUND: Acinetobacter baumannii international clone II (IC2) is a widespread pandemic clone, however, it is rarely described in South America. The present study reported an outbreak caused by XDR IC2 strains in a clinical setting in Rio de Janeiro in 2022. METHODS: Molecular epidemiology analysis was conducted with MLST to determine the clonal relationship and to assign a sequence type. The antimicrobial resistance profile of A. baumannii strains was assessed by the disk-diffusion method and MIC determination, and the presence of antibiotic resistance genes was determined by PCR and Sanger sequencing. The whole genome of one representative strain (AB91) was sequenced to prospect its resistome and virulome. RESULTS: The MLST revealed that all strains belonged to the ST2 (Pasteur scheme) that corresponded to the pandemic IC2 lineage. They presented the XDR phenotype, which was compatible with their resistome composed of several acquired resistance genes and altered housekeeping genes. Additionally, an expressive virulome was revealed in AB91 genome. Genomic comparison with the unique other available IC2 genome from Brazil revealed that outbreaks occurring during (São Paulo - 2020/2021) and after (Rio de Janeiro - 2022) COVID-19 pandemics were caused by the same IC2 lineage. CONCLUSIONS: This study suggests that the presence of a huge arsenal of resistance and virulence genes may have contributed to the persistence and the successful establishment of IC2 in Brazilian clinical settings during and after the COVID-19 pandemics in response to a series of events, such as the antibiotic overused during that period.

Outbreak of high-risk XDR CRAB of international clone 2 (IC2) in Rio Janeiro, Brazil.

OBJECTIVES: Among the high-risk clones of Acinetobacter baumannii, called international clones (ICs), IC2 represents the main lineage causing outbreaks worldwide. Despite the successful global spread of IC2, the occurrence of IC2 is rarely reported in Latin America. Here, we aimed to evaluate the susceptibility and genetic relatedness of isolates from a nosocomial outbreak in Rio de Janeiro/Brazil (2022) and perform genomic epidemiology analyses of the available genomes of A. baumannii. METHODS: Sixteen strains of A. baumannii were subjected to antimicrobial susceptibility tests and genome sequencing. These genomes were compared phylogenetically with other IC2 genomes from the NCBI database, and virulence and antibiotic resistance genes were searched. RESULTS: The 16 strains represented carbapenem-resistant A. baumannii (CRAB) with an extensively drug-resistant profile. In silico analysis established the relationship between the Brazilian CRAB genomes and IC2/ST2 genomes in the world. The Brazilian strains belonged to three sub-lineages, associated with genomes from countries in Europe, North America, and Asia. These sub-lineages presented three distinct capsules, KL7, KL9, and KL56. The Brazilian strains were characterised by the co-presence of blaOXA-23 and blaOXA-66, in addition to the genes APH(6), APH(3"), ANT(3"), AAC(6'), armA, and the efflux pumps adeABC and adeIJK. A large set of virulence genes was also identified: adeFGH/efflux pump; the siderophores barAB, basABCDFGHIJ, and bauBCDEF; lpxABCDLM/capsule; tssABCDEFGIKLM/T6SS; and pgaABCD/biofilm. CONCLUSION: Widespread extensively drug-resistant CRAB IC2/ST2 is currently causing outbreaks in clinical settings in southeastern Brazil. This is due to at least three sub-lineages characterised by an enormous apparatus of virulence and resistance to antibiotics, both intrinsic and mobile.

TREX1 531C/T Polymorphism and Autoantibodies Associated with the Immune Status of HIV-1-Infected Individuals.

Autoimmune diseases can develop during HIV-1 infection, mainly related to the individual's immune competence. The study investigated the association of the TREX1 531C/T polymorphism and antinuclear antibodies (ANA) in HIV-1 infection and the time of antiretroviral therapy (ART) used. Cross-sectional and longitudinal assessments were carried out in 150 individuals, divided into three groups: ART-naïve, 5 years and 10 years on ART; ART-naïve individuals were evaluated for 2 years after initiation of treatment. The individuals' blood samples were submitted to indirect immunofluorescence tests, real-time PCR and flow cytometry. The TREX1 531C/T polymorphism was associated with higher levels of TCD4+ lymphocytes and IFN-α in individuals with HIV-1. Individuals on ART had a higher frequency of ANA, higher levels of T CD4+ lymphocytes, a higher ratio of T CD4+/CD8+ lymphocytes and higher levels of IFN-α than therapy-naïve individuals (p < 0.05). The TREX1 531C/T polymorphism was associated with better maintenance of the immune status of individuals with HIV-1 and ANA with immune restoration in individuals on ART, indicating the need to identify individuals at risk of developing an autoimmune disease.

Deletion of genes linked to the C1-fixing gene cluster affects growth, by-products, and proteome of Clostridium autoethanogenum.

Gas fermentation has emerged as a sustainable route to produce fuels and chemicals by recycling inexpensive one-carbon (C1) feedstocks from gaseous and solid waste using gas-fermenting microbes. Currently, acetogens that utilise the Wood-Ljungdahl pathway to convert carbon oxides (CO and CO2) into valuable products are the most advanced biocatalysts for gas fermentation. However, our understanding of the functionalities of the genes involved in the C1-fixing gene cluster and its closely-linked genes is incomplete. Here, we investigate the role of two genes with unclear functions-hypothetical protein (hp; LABRINI_07945) and CooT nickel binding protein (nbp; LABRINI_07950)-directly adjacent and expressed at similar levels to the C1-fixing gene cluster in the gas-fermenting model-acetogen Clostridium autoethanogenum. Targeted deletion of either the hp or nbp gene using CRISPR/nCas9, and phenotypic characterisation in heterotrophic and autotrophic batch and autotrophic bioreactor continuous cultures revealed significant growth defects and altered by-product profiles for both ∆hp and ∆nbp strains. Variable effects of gene deletion on autotrophic batch growth on rich or minimal media suggest that both genes affect the utilisation of complex nutrients. Autotrophic chemostat cultures showed lower acetate and ethanol production rates and higher carbon flux to CO2 and biomass for both deletion strains. Additionally, proteome analysis revealed that disruption of either gene affects the expression of proteins of the C1-fixing gene cluster and ethanol synthesis pathways. Our work contributes to a better understanding of genotype-phenotype relationships in acetogens and offers engineering targets to improve carbon fixation efficiency in gas fermentation.

Needle visualization during ultrasound-guided puncture: image optimization / Visualização da agulha durante punção guiada por ultrassom: otimização de imagem

Abstract Background Obtaining an adequate image of the needle by ultrasound reduces complications resulting from punctures, increasing patient safety and reducing hospitalization costs. Objectives To verify human perception in relation to number of pixels, while also identifying the best puncture angle and which needle should be used, and to evaluate whether there is a difference if needle visualization software is used. Methods 20 images were analyzed by 103 students who classified them as being sufficient or insufficient and were compared with the quality observed using photoshop. We evaluated whether there were differences between puncture angles of less than 45º and more than 45º, between IV catheter and introducer needles, and between images obtained with and without visualization software. Results There was a higher percentage of sufficient ratings for images those that had more than 60 pixels and when the puncture angle was less than 45º, with significant associations between students' evaluations and each of these groups (p < 0.001). The percentages of images classified as sufficient were higher for images in which a IV catheter was used and also higher for those using the needle visualization software, with significant associations between the results for students' classifications and each of these groups (p < 0.001). Conclusions The human eye classifies an image as sufficient according to higher numbers of pixels. Images of punctures at angles smaller than 45º in relation to the surface, of punctures performed with a IV catheter, and when using specific visualization software are also better detected by the human eye.

Resumo Contexto A obtenção de uma imagem adequada da agulha pelo ultrassom diminui complicações decorrentes de punções, trazendo segurança para os pacientes e diminuindo custos com hospitalização. Objetivos Verificar a percepção do olho humano em relação aos pixels, identificar qual o melhor ângulo da punção e qual agulha deve ser utilizada e avaliar se há diferença com o uso de software de visualização de agulha. Métodos Vinte imagens foram analisadas por 103 alunos, que as classificaram como sendo suficientes ou insuficientes, e comparadas com a qualidade observada pelo photoshop. Avaliou-se se havia diferença entre punções com menos de 45º e mais de 45º, entre cateter EV e agulha introdutora e entre imagens obtidas com e sem software de visualização. Resultados Houve um percentual mais elevado de imagens suficientes entre aquelas que tinham mais de 60 pixels e quando o ângulo era menor que 45º, com associação significativa entre a classificação das avaliações pelos alunos e cada um desses grupos (p < 0,001). O percentual de imagens suficientes foi maior nas imagens realizadas com cateter EV e naquelas que utilizaram o software de visualização da agulha, ocorrendo associação significativa entre os resultados da classificação pelos alunos e cada um desses grupos (p < 0,001). Conclusões O olho humano classifica a imagem como sendo suficiente de acordo com a maior quantidade de pixels. Imagens puncionadas com ângulos menores que 45º em relação à superfície, realizadas com cateter EV e utilizando software específico de visualização também são mais bem detectadas pelo olho humano.

Análise da automedicação pediátrica em pacientes atendidos em hospital de alta complexidade / Analysis of pediatric self-medication in patients treated at a highcomplexity hospital

A automedicação pediátrica ocorre quando pais ou responsáveis usam medicamentos sem prescrição para tratar doenças ou sintomas reconhecidos nas crianças. Analisar o perfil da automedicação pediátrica em um hospital de alta complexidade no interior do Ceará. Trata-se de um estudo transversal baseado na técnica de entrevista, realizado com 135 pais/responsáveis de crianças com idade entre 0 a 12 anos que procuraram atendimento hospitalar entre novembro de 2020 e março de 2021. Observou-se uma prevalência de automedicação de 60%. Quanto à frequência, 43,2% dos entrevistados relataram realizar às vezes. Destes, a maioria era: mãe (94,3%; p<0,0001), com 17 a 27 anos (48,6%; p<0,0001) e renda familiar de menos de 1 salário mínimo (57,1%; p=0,020); 59,3% apontaram como motivo considerar o problema de saúde simples. A principal causa da automedicação foi a febre e os medicamentos mais utilizados foram analgésicos e antipiréticos. A predominância da automedicação pediátrica pelas mães deve-se à experiência com seus outros filhos. Além disso, as condições socioeconômicas influenciaram as práticas errôneas da automedicação, pois as famílias que não possuem recursos para a consulta e compra dos fármacos acabam optando pela autoadministração. O uso indiscriminado de medicações deve ser reprimido, pois, a depender da dose, consequências graves podem ocorrer às crianças. Destaca-se a importância da equipe multiprofissional de saúde durante uma consulta pediátrica, com médicos, enfermeiros e farmacêuticos repassando aos pais informações a respeito dos medicamentos, seus benefícios e riscos, desestimulando a prática nesta faixa populacional e reduzindo os erros de medicação.

Pediatric self-medication occurs when parents or guardians use over-the-counter medications to treat recognized illnesses or symptoms in children. To analyze the profile of pediatric self-medication in a high-complexity hospital in the interior of Ceará. This is a cross-sectional study based on the interview technique, carried out with 135 parents/guardians of children aged 0 to 12 years old who sought hospital care between November 2020 and March 2021. There was a prevalence of self-medication of 60%. As for frequency, 43.2% of respondents reported doing it sometimes. Of these, the majority were: mothers (94.3%; p<0.0001); aged 17 to 27 years old (48.6%; p<0.0001); family income of less than 1 minimum wage (57.1 %; p=0.020); and 59.3% indicated that their reason for medicating was that they considered the health problem as simple. The main cause of self-medication was fever, and the most used drugs were analgesics and antipyretics. The predominance of pediatric self-medication by mothers is due to their experience with their other children. In addition, socioeconomic conditions influenced the erroneous practices of self-medication, as families that do not have the resources to consult and purchase drugs end up opting for self-administration. The indiscriminate use of medications must be repressed, because, depending on the dose, serious consequences can occur to children. The importance of a multidisciplinary health team during a pediatric consultation is highlighted, with doctors, nurses, and pharmacists providing parents with information about medication, their benefits and risks, discouraging the practice in this population group and reducing medication errors.

Boas práticas em saúde integral para travestis, transexuais e outras variabilidades de gênero/gêneros diversos: experiência do Ambulatório de Saúde Integral para Travestis e Transexuais (ASITT) do Centro de Referência e Treinamento DST/Aids-SP, Secretaria de Estado da Saúde de São Paulo / Good practices in integral health for travestis, transsexuals and other variabilities of gender/different genders: experience of the Health Outpatient Clinic for Travestis and Transsexuals (ASITT) of the STD/AIDS Reference and Training Center-SP, State Department of Health of Sao Paulo

O Centro de Referência e Treinamento DST/Aids-SP da Secretaria de Estado da Saúde de São Paulo, inaugurou, em junho de 2009, em suas dependências, o primeiro ambulatório voltado exclusivamente à saúde integral de travestis e transexuais do país, com ênfase no processo transexualizador do Sistema Único de Saúde (SUS) e nas necessidades dessa população. Este artigo tem por objetivo apresentar as modalidades assistenciais ofertadas no serviço, as demandas da população atendida no ambulatório, suas vulnerabilidades, fatores de risco e resiliência a que está submetida, assim como as considerações e os desafios no campo da política pública voltada à população trans para promover seu acesso à atenção em saúde de forma acolhedora, livre de preconceito, julgamentos morais e práticas discriminatórias.

Nanoparticles Obtained from Zein for Encapsulation of Mesalazine.

We encapsulated MSZ in zein nanoparticles (NP-ZN) using a desolvation method followed by drying in a mini spray dryer. These nanoparticles exhibited a size of 266.6 ± 52 nm, IPD of 0.14 ± 1.1 and zeta potential of -36.4 ± 1.5 mV, suggesting colloidal stability. Quantification using HPLC showed a drug-loaded of 43.8 µg/mg. SEM demonstrated a spherical morphology with a size variation from 220 to 400 nm. A FTIR analysis did not show drug spectra in the NPs in relation to the physical mixture, which suggests drug encapsulation without changing its chemical structure. A TGA analysis showed thermal stability up to 300 °C. In vitro release studies demonstrated gastroresistance and a sustained drug release at pH 7.4 (97.67 ± 0.32%) in 120 h. The kinetic model used for the release of MSZ from the NP-ZN in a pH 1.2 medium was the Fickian diffusion, in a pH 6.8 medium it was the Peppas-Sahlin model with the polymeric relaxation mechanism and in a pH 7.4 medium it was the Korsmeyer-Peppas model with the Fickian release mechanism, or "Case I". An in vitro cytotoxicity study in the CT26.WT cell line showed no basal cytotoxicity up to 500 µg/mL. The NP-ZN showed to be a promising vector for the sustained release of MSZ in the colon by oral route.

Determination of phenolic compounds and antioxidant potential of aqueous extracts of Curcuma longa L., Piper nigrum L. and Cuminum cyminum: an experimental and a quantum-mechanical study / Determinação de compostos fenólicos e potencial antioxidante dos extratos aquosos de Curcuma longa L., Piper nigrum L. e Cuminum cyminum: um estudo experimental e quanto-mecânico

Objectives: Evaluation of phenolic compounds and antioxidant activities of aqueous extracts of C. longa, P. nigrum and C. cyminum. In addition to proposing a quantum-mechanical model to evaluate the antioxidant activity. Methods: The aqueous extracts were prepared using roots of the Curcuma longa L., seeds of the Piper nigrum L. and seeds of Cuminum cyminum. The extracts were subjected to tests to detect and quantify phenolic compounds and to assess their antioxidant capacity by different methods. Furthermore, to investigate the electronic nature of the antioxidant activity of the main compounds present in these extracts, frontier molecular orbitals (FMOs) were obtained by the DFT/B3LYP/6-31G(d,p) level of theory. Results: After statistical analysis of the results, a greater number of phenolic compounds and better antioxidant activity was identified in the aqueous extracts of cumin (C. cyminum) in all three assays performed, when compared to the other extracts tested. The theoretical model based on the Pietro method is in agreement with the experimental results. Conclusion: This study has an innovative proposal with the trivial antioxidant activity combined with theoretical quantum-mechanical calculations that can serve to reduce costs and time and to predict the antioxidant activity of subsequent studies.

Objetivos: avaliar os compostos fenólicos e atividades antioxidantes dos extratos aquosos de C. longa, P. nigrum e C. cyminum bem como propor um modelo quanto-mecânico para avaliar a atividade antioxidante. Métodos: os extratos aquosos foram preparados por meio da utilização de raízes de Curcuma longa L., sementes de Piper nigrum L. e sementes de Cuminum cyminum. Os extratos foram submetidos a ensaios para detectar e quantificar compostos fenólicos e atividade antioxidante por diferentes métodos. Além disso, com objetivo de investigar a natureza eletrônica da atividade antioxidante dos principais compostos presentes nesses extratos, orbitais moleculares de fronteira (OMFs) foram obtidos pelo nível de teoria DFT/B3LYP/6-31G(d,p). Resultados: após as análises estatísticas dos resultados, a maior quantidade de compostos fenólicos com maior atividade antioxidante foi identificada no extrato aquoso do cominho (C. cyminum) em todos os ensaios realizados, quando comparados com os outros extratos testados. O modelo teórico baseado no método de Pietro está concordante com os resultados experimentais. Conclusão: este estudo possui uma proposta inovadora com a atividade antioxidante trivial combinada com cálculos quanto-mecânicos que podem servir para reduzir custos e tempo para predizer a atividade antioxidante de estudos futuros.

RNA-seq Sample Preparation Kits Strongly Affect Transcriptome Profiles of a Gas-Fermenting Bacterium.

Transcriptome analysis via RNA sequencing (RNA-seq) has become a standard technique employed across various biological fields of study. The rapid adoption of the RNA-seq approach has been mediated, in part, by the development of different commercial RNA-seq library preparation kits compatible with standard next-generation sequencing (NGS) platforms. Generally, the essential steps of library preparation, such as rRNA depletion and first-strand cDNA synthesis, are tailored to a specific group of organisms (e.g., eukaryotes versus prokaryotes) or genomic GC content. Therefore, the selection of appropriate commercial products is of crucial importance to capture the transcriptome of interest as closely to the native state as possible without introduction of technical bias. However, researchers rarely have the resources and time to test various commercial RNA-seq kits for their samples. This work reports a side-by-side comparison of RNA-seq data from Clostridium autoethanogenum obtained using three commercial rRNA removal and strand-specific library construction products of NuGEN Technologies, Qiagen, and Zymo Research and assesses their performance relative to published data. While all three vendors advertise their products as suitable for prokaryotes, we found significant differences in their performance regarding rRNA removal, strand specificity, and most importantly, transcript abundance distribution profiles. Notably, RNA-seq data obtained with Qiagen products were most similar to published data and delivered the best results in terms of library strandedness and transcript abundance distribution range. Our results highlight the importance of finding appropriate organism-specific workflows and library preparation products for RNA-seq studies. IMPORTANCE RNA-seq is a powerful technique for transcriptome profiling while involving elaborate sample processing before library sequencing. We show that RNA-seq library preparation kits can strongly affect the outcome of an RNA-seq experiment. Although library preparation benefits from the availability of various commercial kits, choosing appropriate products for the specific samples can be challenging for new users or for users working with unconventional organisms. Evaluating the performance of different commercial products requires significant financial and time investments infeasible for most researchers. Therefore, users are often guided in their choice of kits by published data involving similar input samples. We conclude that important consideration should be given to selecting sample processing workflows for any given organism.

Faster Growth Enhances Low Carbon Fuel and Chemical Production Through Gas Fermentation.

Gas fermentation offers both fossil carbon-free sustainable production of fuels and chemicals and recycling of gaseous and solid waste using gas-fermenting microbes. Bioprocess development, systems-level analysis of biocatalyst metabolism, and engineering of cell factories are advancing the widespread deployment of the commercialised technology. Acetogens are particularly attractive biocatalysts but effects of the key physiological parameter-specific growth rate (µ)-on acetogen metabolism and the gas fermentation bioprocess have not been established yet. Here, we investigate the µ-dependent bioprocess performance of the model-acetogen Clostridium autoethanogenum in CO and syngas (CO + CO2+H2) grown chemostat cultures and assess systems-level metabolic responses using gas analysis, metabolomics, transcriptomics, and metabolic modelling. We were able to obtain steady-states up to µ ∼2.8 day-1 (∼0.12 h-1) and show that faster growth supports both higher yields and productivities for reduced by-products ethanol and 2,3-butanediol. Transcriptomics data revealed differential expression of 1,337 genes with increasing µ and suggest that C. autoethanogenum uses transcriptional regulation to a large extent for facilitating faster growth. Metabolic modelling showed significantly increased fluxes for faster growing cells that were, however, not accompanied by gene expression changes in key catabolic pathways for CO and H2 metabolism. Cells thus seem to maintain sufficient "baseline" gene expression to rapidly respond to CO and H2 availability without delays to kick-start metabolism. Our work advances understanding of transcriptional regulation in acetogens and shows that faster growth of the biocatalyst improves the gas fermentation bioprocess.

Estudo clínico-epidemiológico de HIV positivos acompanhados em um serviço de assistência especializada

Introdução: A Síndrome da Imunodeficiência Adquirida (AIDS) é uma manifestação avançada da infecção pelo Vírus da Imunodeficiência Humana (HIV). Esta infecção caracteriza-se por uma imunossupressão progressiva da imunidade celular, deixando o indivíduo suscetível a doenças oportunistas. Objetivos: O estudo objetivou caracterizar o perfil clínico-epidemiológico,bem como a prevalência de coinfecção pelo vírus da hepatite B, C e sífilis entre os casos de HIV/AIDS em indivíduos atendidos no Serviço de Assistência Especializada (SAE) em Patos de Minas, MG. Métodos:Tratou-se de uma pesquisa descritiva documental, retrospectiva, de delineamento transversal e abordagem quantitativa utilizando dados do prontuário de pacientes. A amostra foi constituída por 110 indivíduos diagnosticados com HIV entre 2015 e 2017. A coleta de dados foi realizada por meio de uma ficha contendo as variáveis de interesse. Resultados: Houve predominância do sexo masculino (72,7%), solteiros (60,0%), faixa etária entre 18 e 33 anos (60,0%), ensino médio completo (63,6%)e a maioria dos pacientes tem emprego (63,7%). A via de transmissão predominante foi o contato sexual (99,1%), em que mais da metade dos pacientes referiram manter relações heterossexuais (57,3%)e sem uso de preservativo (63,6%). A coinfecção de HIV/hepatite B foi detectada em três indivíduos (2,7%) e de HIV/sífilis em 22 (20,0%). Não houve casos de coinfecção HIV/hepatite C. Conclusão: O presente estudo foi relevante para o conhecimento da prevalência de coinfecções entre portadores de HIV. Por meiodas informações obtidas, o serviço de saúde poderá elaborar estratégias para prevenção e tratamento adequado, reduzindo os casos de coinfecção e oferecendo uma melhor qualidade de vida a estes indivíduos

Bloodstream infection by Saccharomyces cerevisiae in a COVID-19 patient receiving probiotic supplementation in the ICU in Brazil.

Care-related infections (CRIs) have a negative impact on the morbidity and mortality of patients in intensive care. Among them, fungal infections (e.g. Candida spp. and Aspergillus spp.) have high mortality in critically ill patients, particularly those with acute respiratory distress syndrome (ARDS) and immunosuppression. Coronavirus disease 2019 (COVID-19) causes severe respiratory changes and deregulation of the immune system. Here, we describe a case of fungal infection in an intensive care unit (ICU) patient with COVID-19 caused by Saccharomyces cerevisiae, a yeast widely used in the baking and wine production industries. It is also used as a probiotic, both for prevention and as adjunctive therapy in patients with diarrhoea. The patient was admitted to the ICU with a diagnosis of COVID-19, respiratory failure, complications of ARDS and renal failure, and was being treated with antibiotics and vasoactive amines. Later, the patient had diarrhoea and, after supplementation with Saccharomyces, he developed a bloodstream infection with Saccharomyces. The patient died after 61 days of hospitalization due to thrombocytopenia and bleeding. This case report suggests avoiding the use of probiotics in intensive care patients under the administration of antibiotics and amines, and with damage to the intestinal mucosa and immunodeficiency caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), since these factors could favour the translocation of fungi.