01.1 - Graduação (Sede)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/2
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Resultados da Pesquisa
Item Análise de colinearidade gênica do operon aprX-lipA em isolados de Pseudomonas fluorescens(2023-09-15) Silva, Israel Santos da; Freitas, Nara Suzy Aguiar de; Souza, Paulo Roberto Eleutério de; http://lattes.cnpq.br/1971832245117283; http://lattes.cnpq.br/6891650997818766; http://lattes.cnpq.br/9803828236017805Pseudomonas fluorescens are Gram-negative bacilli that are motile and found in terrestrial and aquatic ecosystems. Due to their psychrotrophic characteristics, these bacteria are often associated with the contamination of unpasteurized milk and its derivatives, such as cheese and butter. The proteases and lipases produced by P. fluorescens are the primary factors in the prevalence of dairy product contamination. These enzymes are encoded by the aprX and lipA genes, which are present in the aprX-lipA operon. In this regard, we evaluated the genomic components surrounding the aprX-lipA operon of P. fluorescens from different sources, aiming to detect genetic patterns inherent to these organisms and their correlation with proteolytic activity. We used the NCBI database, the String platform, and Interpro for comparative evaluation of the selected genomes. In the four isolates analyzed, the aprX-lipA operon is highly variable structurally, with unique configurations for each genome. The gene co-expression relationships of the genes surrounding the aprX protease also show qualitative and quantitative variations, both intra- and inter-species within the Pseudomonas genus. We detected components of the CRISPR type 1 system, previously unrelated to the operon, which can amplify, move, and modify genes related to the defense mechanism, pathogenic or not, of the genus. The patterns related to pathogenicity indicate that new biomarkers can be used for genomic surveillance.Item Sala de aula invertida para a construção e articulação de conceitos bioquímicos(2021-02-26) Gomes, Isabela Lemos; Couto, Janaína de Albuquerque; Cordeiro, Priscila Aparecida dos Santos; http://lattes.cnpq.br/1352379618124390; http://lattes.cnpq.br/7709040837130788; http://lattes.cnpq.br/9160682195907995Biochemistry has emerged in recent years as an object of discussions in the academic environment due to the difficulties present in the teaching and learning process. These difficulties are more accentuated when the teacher bases his pedagogical practice on traditional teaching. In this context, there is a need for teachers to seek new paths and new teaching methodologies that focus on the interaction between the subjects, the protagonism, the critical posture and the autonomy of the students. The Flipped Classroom is characterized as an approach by which the student must previously study the content, serving the classroom as an extension and practical application of the studied concepts. In view of the above, the present methodological proposal aimed to develop an innovative pedagogical action for the construction of biochemical concepts through the Flipped Classroom. The research was carried out in a group of the Bachelor of Biological Sciences course at a Public University, where the monitoring was done through presence in classes, registration of activities through notes in field notebook and collection of material produced in the intervention. Upon presentation and signature of the Free and Informed Consent Term (ICF) by the teacher, the interventions were monitored. Therefore, a sequence of pedagogical actions was planned to work on the Gene Expression content, which is addressed in the discipline of Biochemistry. The action was preceded by the survey of students' previous conceptions, following the other steps through the Flipped Classroom, using the institutional Virtual Learning Environment, and the process was evaluated through collective and individual productions. The results were analyzed in order to assess the process of building concepts about the specific content.Item Análise da Influência do número de cópias na expressão do gene blaKPC(2021-03-05) Oliveira, Michelly Maria Pereira e; Almeida, Anna Carolina Soares; http://lattes.cnpq.br/4153747599532886Enterobacteria has stood out in clinical practice by detecting enzymatic mechanisms that confer resistance to antimicrobials, especially Klebsiella pneumoniae carbapenemase (KPC) due to its rapid worldwide dissemination caused by the location of the blaKPC gene in large transferable plasmids and transposons. The expression of the blaKPC gene can be affected by intrinsic characteristics of the host that hosts it or the number of copies. An unusual phenotype was observed in clinical isolates of P. stuartii and M. morganii and their respective transformants, where E. coli cells that received plasmids that carried the blaKPC gene, showed MIC values, for some beta- lactams, higher than in clinical isolates. The objective of this work was to analyze the number of copies of the blaKPC gene, relating them to their respective MICs. The genomic DNA of the bacterial isolates was extracted from the PromegaTM WizardTM Genomic DNA Purification kit according to the manufacturer's guidelines, and was then quantified by spectrophotometry using the NanoDropTM Lite equipment from Thermo Fisher Scientific. The endogenous control genes were chosen from the literature after a robust search, after which they were analyzed in silico. Using databases, software and other tools, primers were designed. To carry out absolute quantification, an estimate was made based on a proportion of the relative quantitative relationship between target and endogenous control, using the formula 2-ΔCq. For the experiments, the SteponeTM Real-time PCR System (Applied Biosystems) and the SYBR Green PCR Master Mix (Applied Biosystems) were used. The designed primers underwent a validation step to evaluate their efficiency (tufMm - 93,019, tufPs - 90,228 and tufKp - 103,474, both with R2 close to 1). The data generated by the absolute qPCR experiments were associated with the different phenotypic profiles observed and from the tests it was determined that the number of copies of the blaKPC gene for transforming isolates and clinical isolates does not vary significantly, pointing out that another mechanism must be interfering in the expression of the blaKPC gene, directly influencing resistance levels.