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1.
Vitae (Medellín) ; 30(2): 1-7, 2023-05-08. Ilustraciones
Artigo em Inglês | LILACS, COLNAL | ID: biblio-1538037

RESUMO

Background: The edible green algae Caulerpa racemosa (Forsskal) J. Agardh (Caulerpaceae), also known as "sea grape", is an excellent source of phenolic compounds known for their activity to reduce free radicals. Objectives: The research aims to evaluate the total phenolic content and antioxidant activity of C. racemosa (70% ethanol extracts) obtained from different extraction methods, such as maceration, Soxhlet, and ultrasound. Methods: Total phenolics of the extracts were determined by the colorimetry method using the Folin-Ciocalteu reagent. Total phenol content was expressed as mg gallic acid equivalent (GAE) per g extract. The 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical was used to assess the antioxidant activity of the extracts. Results: the ethanol extract of C. racemosa obtained from the ultrasonic methods had the highest phenolic content (39.38 mg GAE/g) compared to other extraction methods (Soxhlet was 36.88 mg GAE/g and maceration was 22.05 mg GAE/g). The IC50 value against DPPH of the C. racemosa ethanol extracts using ultrasonic, Soxhlet, and maceration was 352.95, 365.73, and 375.84 µg/mL, respectively. Conclusions: the variation of the extraction methods affected the total phenolics content of C. racemosa ethanol extracts and their antioxidant activity. We reported here the potential of C. racemosa extracts as an antioxidant raw material from marine plants for medicinal, nutraceutical, cosmetics, and food products; however, more research is needed.


Antecedentes: El alga verde comestible Caulerpa racemosa (Forsskal) J. Agardh (Caulerpaceae), también conocida como "uva de mar", es una excelente fuente de compuestos fenólicos conocidos por su actividad para reducir los radicales libres. Objetivos: La investigación pretende evaluar el contenido fenólico total y la actividad antioxidante de C. racemosa (extractos de etanol al 70%) obtenidos a partir de diferentes métodos de extracción, como maceración, Soxhlet y ultrasonido. Métodos: Los fenoles totales de los extractos se determinaron por el método colorimétrico utilizando el reactivo de Folin-Ciocalteu. El contenido total de fenoles se expresó como mg de ácido gálico equivalente (GAE) por g de extracto. Para evaluar la actividad antioxidante de los extractos se utilizó el radical libre 2,2-difenil-1-picrilhidrazilo (DPPH). Resultados: el extracto etanólico de C. racemosa obtenido por ultrasonido presentó el mayor contenido fenólico (39,38 mg GAE/g) en comparación con otros métodos de extracción (Soxhlet fue de 36,88 mg GAE/g y maceración fue de 22,05 mg GAE/g). El valor IC50 frente a DPPH de los extractos etanólicos de C. racemosa mediante ultrasonido, Soxhlet y maceración fue de 352,95, 365,73 y 375,84 µg/mL, respectivamente. Conclusiones: la variación de los métodos de extracción afectó al contenido total de fenoles de los extractos etanólicos de C. racemosa y a su actividad antioxidante. Aquí reportamos el potencial de los extractos de C. racemosa como materia prima antioxidante a partir de plantas marinas para productos medicinales, nutracéuticos, cosméticos y alimenticios; sin embargo, se necesita más investigación.


Assuntos
Humanos , Compostos Fenólicos , Extratos Vegetais , Caulerpa , Antioxidantes
2.
Rev. Assoc. Med. Bras. (1992, Impr.) ; Rev. Assoc. Med. Bras. (1992, Impr.);68(12): 1681-1685, 2022. tab
Artigo em Inglês | LILACS-Express | LILACS | ID: biblio-1422543

RESUMO

SUMMARY OBJECTIVE: The aim of this study was to investigate the effectiveness of immature granulocyte count, immature granulocyte percentage, and total bilirubin value in predicting complicated and perforated appendicitis in patients aged 65 years and older with a diagnosis of appendicitis. METHODS: In this study, 84 patients, aged 65 years and older, who had appendectomy demographic information, preoperative white blood cell count, neutrophil/lymphocyte ratio, immature granulocyte count and immature granulocyte percentage, operation findings, and pathology results were collected retrospectively. They were grouped into 4 categories: complicated, non-complicated, perforated, and non-perforated, according to the data and surgical findings. RESULTS: Total bilirubin and immature granulocyte count were found to be statistically significant in predicting complicated and perforated appendicitis in patients aged 65 years and older with a diagnosis of appendicitis. The total bilirubin was found to have the following values in differentiating complicated appendicitis: area under the curve=0.883, sensitivity=78.3%, and specificity=88.5%. Total bilirubin had the highest discrimination power with area under the curve=0.804 in differentiating perforation. CONCLUSION: The immature granulocyte percentage and total bilirubin count are the fast, inexpensive, and reliable parameters that can be used to predict complicated and perforated appendicitis in patients aged 65 years and older.

3.
Genet Mol Biol ; 36(3): 438-47, 2013 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-24130453

RESUMO

Snake liver has been implicated in the adaptation of snakes to a variety of habitats. However, to date, there has been no systematic analysis of snake liver proteins. In this study, we undertook a proteomic analysis of liver from the colubrid snake Elaphe taeniura using a combination of two-dimensional electrophoresis (2-DE) and matrix-assisted laser desorption/ionization time of flightmass spectrometry (MALDI-TOF MS). We also constructed a local protein sequence database based on transcriptome sequencing to facilitate protein identification. Of the 268 protein spots revealed by 2-DE 109 gave positive MS signals, 84 of which were identified by searching the NCBInr, Swiss-Prot and local databases. The other 25 protein spots could not be identified, possibly because their transcripts were not be stable enough to be detected by transcriptome sequencing. GO analysis showed that most proteins may be involved in binding, catalysis, cellular processes and metabolic processes. Forty-two of the liver proteins identified were found in other reptiles and in amphibians. The findings of this study provide a good reference map of snake liver proteins that will be useful in molecular investigations of snake physiology and adaptation.

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