Electrocardiographic Aspects of Singleton Pregnancy and Neonatal Period in American Miniature Horse Breed

Background: During pregnancy, cardiovascular adaptations occur in order to meet maternal demands and adequate support for fetal development, but they are still unclear in the equine species, especially in the American Miniature horse breed. The main hemodynamic changes that occur during pregnancy are increased heart rate, cardiac output, and blood volume. It is necessary to use the reference values for the miniature breeds, in addition to the age range and reproductive condition, so the objective of this study was to evaluate the effect of pregnancy on electrocardiographic (ECG) parameters in mares and also of age in newborns foals of American Miniature horse breed. Materials, Methods & Results: Ten American Miniature Horse mares, between 7 and 19 years old (12.14 ± 4.05 years), 116.85 ± 24.09 kg of body weight were used in the experiment. All these mares were pluriparous, with 5.9 ± 3.5 of births, minimum of 2, and maximum of 12 foaling times. They were maintained in common social group in an indoor house stable with straw bed, with access to an outdoor paddock for several h per day. Twice a day they were fed with hay. Mineral supplements and water were available ad libitum. The ECG were obtained in 10 pregnant mares and in 10 neonates. All females were examined at a representative time of each trimester of pregnancy, at 30, 210, 300 days before and 21 days after delivery. Neonates were examined on different times: first 24 h after delivery, weekly on the 7th, 14th, 21st, 28th and 35th days of age. The ECG parameters considered were the heart rate and rhythm, duration and intervals (P, PR, QRS, QT, T) and amplitude (P, R, S, T) of ECG waves. The mean of pregnancy duration was 319.4 ± 4.97 days. Heart Rate (HR) varied between 51 to 59 bpm during pregnancy and 56 bpm on the 21st day after delivery. Comparing the clinical parameters of pregnant mares, non-pregnant mares and foal a difference was found for HR, Respiration Rate (RR) and Temperature (P = 0.001). All ECG parameters of pregnant, non-pregnant and foal mares showed a significant difference (P = 0.0001), except for the amplitude of the P1, P2 and R waves, which was similar for the 3 groups. The mean values of HR and amplitude of the positive T wave were higher in foals when compared to pregnant and non-pregnant mares, which in turn did not differ from each other. The mean duration of the P wave, PR segment, QRS complex, QT segment and T wave were the same among mares and greater than in foals. Comparing pregnant and non-pregnant mares, there was a difference in only 3 parameters: duration of the QTc segment, amplitude of the S wave and negative T wave. The non-pregnant mares had a longer duration of the QTc segment and a greater amplitude of the negative T wave, while the foals had a greater amplitude of the S wave.Discussion: Although this study did not measure HR at delivery time, it is worth to consider the action of the parasympathetic autonomic nervous system close to delivery, which reduces the HR of mares. This is because at delivery, sympathetic-adrenal activation should be avoided since the increase in sympathetic tone can cause uterine atony via B2 receptors. For this reason, it has been shown that, during physiological birth, horses are under parasympathetic control, and stress response mechanisms are not activated. It was conclude that the morphometry of the waves, intervals and ECG complexes, during the evolution of the reproductive state, the electrocardiographic aspects were generally associated with heart rate (PR and QT intervals). As for neonates, there was a discrepancy among the most of ECG parameters when compared to the adult female, regardless of reproductive status, clarifying the importance of ECG patterns not only for the breed, but also for the age group

Silepse

A tradução deste artigo foi realizada pelo curso de Letras-Bacharelado em Tradução da Universidade Federal de Juiz de Fora, no âmbito do Estágio Supervisionado de Tradução-Inglês, coordenado e supervisionado pela Profª. Drª. Sandra Aparecida Faria de Almeida, do Departamento de Letras Estrangeiras Modernas, e dela participaram os alunos: Carla Amorim Pereira, Gabriela Detoni Rodrigues, Gabriela Ragazzi Baptista Bulgarelli, Isadora Souza Aruante, Luana Campos Leal Rodrigues, Paulo Henrique Migliorelli Ribeiro e Vinicius Moraes Tiago. O estabelecimento do texto final e a revisão técnica foram realizados pela Profª. Drª. Charlene Martins Miotti, do Departamento de Letras da Universidade Federal de Juiz de Fora

Genetic diversity and population structure of Musa accessions in ex situ conservation

Abstract\ud \ud \ud \ud Background\ud \ud Banana cultivars are mostly derived from hybridization between wild diploid subspecies of Musa acuminata (A genome) and M. balbisiana (B genome), and they exhibit various levels of ploidy and genomic constitution. The Embrapa ex situ Musa collection contains over 220 accessions, of which only a few have been genetically characterized. Knowledge regarding the genetic relationships and diversity between modern cultivars and wild relatives would assist in conservation and breeding strategies. Our objectives were to determine the genomic constitution based on Internal Transcribed Spacer (ITS) regions polymorphism and the ploidy of all accessions by flow cytometry and to investigate the population structure of the collection using Simple Sequence Repeat (SSR) loci as co-dominant markers based on Structure software, not previously performed in Musa.\ud \ud \ud \ud Results\ud \ud From the 221 accessions analyzed by flow cytometry, the correct ploidy was confirmed or established for 212 (95.9%), whereas digestion of the ITS region confirmed the genomic constitution of 209 (94.6%). Neighbor-joining clustering analysis derived from SSR binary data allowed the detection of two major groups, essentially distinguished by the presence or absence of the B genome, while subgroups were formed according to the genomic composition and commercial classification. The co-dominant nature of SSR was explored to analyze the structure of the population based on a Bayesian approach, detecting 21 subpopulations. Most of the subpopulations were in agreement with the clustering analysis.\ud \ud \ud \ud Conclusions\ud \ud The data generated by flow cytometry, ITS and SSR supported the hypothesis about the occurrence of homeologue recombination between A and B genomes, leading to discrepancies in the number of sets or portions from each parental genome. These phenomenons have been largely disregarded in the evolution of banana, as the “single-step domestication” hypothesis had long predominated. These findings will have an impact in future breeding approaches. Structure analysis enabled the efficient detection of ancestry of recently developed tetraploid hybrids by breeding programs, and for some triploids. However, for the main commercial subgroups, Structure appeared to be less efficient to detect the ancestry in diploid groups, possibly due to sampling restrictions. The possibility of inferring the membership among accessions to correct the effects of genetic structure opens possibilities for its use in marker-assisted selection by association mapping.This work was funded by FAPESP [2008/03470-0] and CNPq. Technical assistance by Luis Eduardo Fonseca was greatly appreciated. The authors (ONJ, SSO, EP, AF) are grateful for the fellowships provided by CNPq and GGS to FAPESP [2010/01398-0]

Quantum Biochemistry Screening and In Vitro Evaluation of Leishmania Metalloproteinase Inhibitors

Funding Information: Global Health and Tropical Medicine funded this research: Grant number IHMT-UID/multi/04413/2013 and Grant number PTDC/CVT-CVT/28908/2017, FCT-Portugal. Funding Information: We would like to thank to CNPq/Brazil, CAPES/Brazil and FCT/Portugal for grants and fellowships. C.J.G.M., J.W.d.F.O., T.K.d.B.P., F.L.d.S.J. and B.A.-C. thank the financial support (PhD and Post-doctoral fellowships) provided by Capes/Brazil. M.S.S. and H.A.O.R. thank CNPq/Brazil for the Research Grant (Bolsa de Produtividade em Pesquisa). We also would like to thank the Department of Materials Engineering at UFRN for allowing the use of their scanning electron microscope, and the Department of Biochemistry at UFRN for allowing the use of their flow cytometer. Publisher Copyright: © 2022 by the authors.Leishmanolysin, also known as major promastigote protease (PSP) or gp63, is the most abundant surface glycoprotein of Leishmania spp., and has been extensively studied and recognized as the main parasite virulence factor. Characterized as a metalloprotease, gp63 can be powerfully inactivated in the presence of a metal chelator. In this study, we first used the structural parameters of a 7-hydroxycoumarin derivative, L1 compound, to evaluate the theoretical–computational experiments against gp63, comparing it with an available metal chelator already described. The methodology followed was (i) analysis of the three-dimensional structure of gp63 as well as its active site, and searching the literature and molecular databases for possible inhibitors; (ii) molecular docking simulations and investigation of the interactions in the generated protein–ligand complexes; and (iii) the individual energy of the gp63 amino acids that interacted most with the ligands of interest was quantified by ab initio calculations using Molecular Fraction with Conjugated Caps (MFCC). MFCC still allowed the final quantum balance calculations of the protein interaction to be obtained with each inhibitor candidate binder. L1 obtained the best energy quantum balance result with −2 eV, followed by DETC (−1.4 eV), doxycycline (−1.3 eV), and 4-terpineol (−0.6 eV), and showed evidence of covalent binding in the enzyme active site. In vitro experiments confirmed L1 as highly effective against L. amazonensis parasites. The compound also exhibited a low cytotoxicity profile against mammalian RAW and 3T3 cells lines, presenting a selective index of 149.19 and 380.64 µM, respectively. L1 induced promastigote forms’ death by necrosis and the ultrastructural analysis revealed disruption in membrane integrity. Furthermore, leakage of the contents and destruction of the parasite were confirmed by Spectroscopy Dispersion analysis. These results together suggested L1 has a potential effect against L. amazonensis, the etiologic agent of diffuse leishmaniasis, and the only one that currently does not have a satisfactory treatment.publishersversionpublishe

Aspectos fisiopatológicos da Doença de Alzheimer: uma revisão narrativa

Doenças neurodegenerativas são aquelas que causam a degeneração dos neurônios de forma irreversível. Essas células são fundamentais para o funcionamento do sistema nervoso. Em grande parte dessas doenças, se não houver intervenção, logo no início, e um tratamento adequado, o paciente poderá perder suas funções físicas, motoras, fisiológicas e até mesmo sua capacidade cognitiva, como por exemplo, na doença de Alzheimer. O objetivo deste trabalho é expor a fisiopatologia da DA. Este estudo trata-se de uma revisão narrativa com o propósito de discutir e descrever sobre a DA e sua fisiopatologia. Foi utilizado o banco de dados: SciElo (Scientific Eletronic Library Online) e PubMed (US National Library of Medicine), com dados científicos de 12 de março de 2023, com restrição de idioma (português) e com restrição dos últimos 5 anos da publicação.  Estudos que abordaram os aspectos fisiológicos da DA avaliaram como principal causa da condição clínica uma série de eventos ocasionando em neurodegeneração gradual, desencadeada por dois tipos de lesões: a primeira; uma deposição de placas extracelulares formadas por proteína beta amilóide. Essa deposição é localizada especificamente no sítio sináptico, podendo ser com diferentes características morfológicas, como neurítica, difusa, de núcleo denso, ou tipo clássica e compacta. Diante do exposto, é importante ressaltar a neurodegeneração gradual por decomposição de placas extracelulares nos sítios sinápticos, além de hiperfosforilação da proteína TAU por enrolamentos neurofibrilares como os principais eventos causadores da condição clínica da doença de Alzheimer pela inibição sináptica e inflamação e dano gradual

PERSPECTIVAS FARMACOLÓGICAS NO TRATAMENTO DO AUTISMO INFANTIL: UMA REVISÃO INTEGRATIVA

Childhood autism is a neurodevelopmental disorder characterized by difficulties in social communication, interaction and repetitive behavior patterns. This study aims to carry out an integrative review of the pharmacological interventions used in the treatment of childhood autism, focusing on current approaches. Understanding these interventions is crucial to optimizing clinical management and improving the quality of life of affected children. An integrative literature review was conducted, searching for scientific articles in indexed databases, using descriptors related to childhood autism and pharmacological interventions. Studies investigating the use of drugs in the treatment of autism were included, focusing on recent and relevant approaches. The references were analyzed and organized according to the Vancouver style. Several pharmacological interventions used in the treatment of childhood autism were identified, with methylphenidate and cannabinoids standing out. These have shown positive effects in improving symptoms related to attention and hyperactivity. In addition, studies have pointed to pathophysiological changes, such as immunoregulation, inflammation, oxidative stress and mitochondrial dysfunction, which may offer additional therapeutic targets for future approaches. The integrative review demonstrates the diversity of pharmacological interventions available for the treatment of childhood autism, highlighting the need for a personalized and interdisciplinary approach. The individualization of treatment, taking into account individual characteristics and clinical peculiarities, is fundamental. In addition, the long-term safety and efficacy of pharmacological interventions must be carefully monitored. This study contributes to the current understanding of pharmacological therapeutic options and offers insights for future research in this field.O autismo infantil é um transtorno do neurodesenvolvimento caracterizado por dificuldades na comunicação social, interação e padrões de comportamento repetitivos. O presente estudo visa realizar uma revisão integrativa das intervenções farmacológicas utilizadas no tratamento do autismo infantil, com foco nas abordagens atuais. O entendimento dessas intervenções é crucial para otimizar o manejo clínico e melhorar a qualidade de vida das crianças afetadas. Foi conduzida uma revisão integrativa da literatura, com a busca de artigos científicos nas bases de dados indexadas, utilizando descritores relacionados ao autismo infantil e intervenções farmacológicas. Foram incluídos estudos que investigaram o uso de fármacos no tratamento do autismo, com foco em abordagens recentes e relevantes. As referências foram analisadas e organizadas conforme o estilo de Vancouver. Foram identificadas diversas intervenções farmacológicas utilizadas no tratamento do autismo infantil, com destaque para o metilfenidato e os canabinóides. Estes mostraram efeitos positivos na melhoria dos sintomas relacionados à atenção e hiperatividade. Além disso, estudos apontaram para alterações fisiopatológicas, como imunorregulação, inflamação, estresse oxidativo e disfunção mitocondrial, que podem oferecer alvos terapêuticos adicionais para abordagens futuras. A revisão integrativa demonstra a diversidade de intervenções farmacológicas disponíveis para o tratamento do autismo infantil, evidenciando a necessidade de uma abordagem personalizada e interdisciplinar. A individualização do tratamento, considerando características individuais e peculiaridades clínicas, é fundamental. Além disso, a segurança e eficácia a longo prazo das intervenções farmacológicas devem ser cuidadosamente monitoradas. Este estudo contribui para o entendimento atual das opções terapêuticas farmacológicas e oferece insights para futuras pesquisas nesse campo

Avaliação do estado nutricional de recém-nascidos pré-termo em unidade de terapia intensiva neonatal / Assessment of nutritional status of preterm newborns in the neonatal intensive care unit

O recém-nascido pré-termo (RNPT) é considerado aquele que nasce com idade gestacional inferior a 37 semanas. Devido à imaturidade fisiológica é frequente que esses recém-nascidos necessitem de cuidados intensivos e, portanto, sejam considerados pacientes em risco nutricional. A avaliação do estado do estado nutricional (AEN) possui a finalidade de identificar sinais de risco de desnutrição e promover a adequação da dietoterapia.  O objetivo deste estudo foi realizar uma revisão da literatura acerca dos métodos de AEN em RNPT internados em unidades de terapia intensiva neonatal. Trata-se de uma revisão narrativa, realizada por meio de consulta ao Scielo, ao PubMed, e aos manuais e diretrizes para a prática clínica. No ambiente de terapia intensiva neonatal a avaliação antropométrica deve ser adaptada ao estado clínico do RNPT, sendo realizada com maior periodicidade, observando-se os sinais que indiquem o risco de desnutrição. Conclui-se que o método para a realização da AEN do RNPT é dependente da condição clínica do paciente, sendo realizada regularmente a fim de promover a adequação da dietoterapia

Entendendo a agitação psicomotora na sociedade brasileira: revisão de literatura

Introduction: Psychomotor agitation is a characteristic feature characterized by intense arousal, involving both psychological and motor aspects. This condition can manifest in various ways and is often associated with various mental and neurological disorders. Methodology: This literature review employed a systematic approach to identify relevant studies on psychomotor engineering in hospital settings in Brazil. The descriptors used were Psychomotor Agitation, Psychomotor Hyperactivity, Brazil, Hospitals, Psychiatric. The search was conducted in the PUBMED database, using the search filter for the last 10 years. Result: In the context of non-pharmacological management of the agitated patient, recommendations emphasize the importance of following a line of interventions, prioritizing less invasive measures before resorting to more coercive approaches. The process begins with directing the patient to a secure environment, providing a fundamental basis for improvement management. Conclusion: Psychomotor improvement is a symptom that can significantly impact a person's quality of life. Understanding the underlying causes and implementing an appropriate therapeutic approach are essential for the effective management of this state. The support of mental health professionals is crucial to assist in both the assessment and treatment of this complex condition.Introdução: A agitação psicomotora é uma característica que se caracteriza por uma intensa intensa, envolvendo tanto aspectos psicológicos quanto motores. Esta condição pode se manifestar de várias maneiras e está frequentemente associada a diversos transtornos mentais e neurológicos. Metodologia: Esta revisão bibliográfica utilizou uma abordagem sistemática para identificar estudos relevantes sobre engenharia psicomotora em contextos hospitalares no Brasil. Os descritores utilizados foram Psychomotor Agitation, Psychomotor Hyperactivity, Brazil, Hospitals, Psychiatric. A busca foi conduzida na base de dados PUBMED, utilizando o filtro de pesquisa nos últimos 10 anos. Resultado: No contexto do manejo não farmacológico do paciente agitado, as recomendações ressaltam a importância de seguir uma linha de intervenções, priorizando medidas menos invasivas antes de recorrer a abordagens mais coercitivas. O processo inicia com o encaminhamento do paciente para um ambiente protegido, proporcionando uma base fundamental para a gestão da melhoria. Conclusão: A melhoria psicomotora é um sintoma que pode impactar significativamente a qualidade de vida de uma pessoa. A compreensão das causas subjacentes e a implementação de uma abordagem terapêutica adequada são essenciais para o manejo eficaz desse estado. O suporte de profissionais de saúde mental é fundamental para auxiliar tanto na avaliação quanto no tratamento dessa condição complexa

Reinfecção da Covid-19 em neonatos e crianças: revisão de literatura : Reinfection of Covid-19 in neonates and children: literature review

Em dezembro de 2019, um novo vírus respiratório foi detectado na China, sendo denominado posteriormente como COVID-19, provindo do vírus SARS-CoV-2. Este vírus se espalhou rapidamente gerando uma pandemia mundial. Vários foram e ainda são os problemas decorrentes deste vírus, que atingiu desde crianças aos idosos, dentre eles, cita-se a reinfeção dos indivíduos, causando como consequência, problemas de saúde inacabáveis. Assim, devido aos estudos elencarem menores sinais e sintomas nas crianças e, ainda, menores taxas de infecção, passou-se a questionar quanto as reinfecções em crianças e neonatos. Por isso, o estudo objetivou realizar uma revisão de literatura sobre reinfecção de COVID-19 em crianças e neonatos. Para isso, realizou-se uma revisão sistemática de literatura, através de uma busca nas bases de dados Latino-Americana e do Caribe em Ciências da Saúde, Google Scholar e Scientific Electronic Library Online, utilizando-se os descritores: Reinfecção COVID-19; Reinfecção COVID-19 em crianças; Reinfecção COVID-19 em neonatos; COVID-19 e reinfecção. Com isso, foram selecionados 10 artigos que compunham os critérios de inclusão e exclusão do presente estudo. Dessa forma, destaca-se que os estudos evidenciaram que o número de reinfecções em crianças e neonatos é baixo, porém, são escassas as literaturas sobre o tema, possuindo, assim diversas lacunas a serem sanadas para uma compreensão melhor do assunto