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Torres AM, Ojeda GA, Angelina E, Bustillo S, Peruchena N, Tonidandel L, Larcher R, Nardin T, Dellacassa E. The anti-snake activity of Nectandra angustifolia flavonoids on phospholipase A2: In vitro and in silico evaluation. J Ethnopharmacol 2023; 302:115889. [PMID: 36334817 DOI: 10.1016/j.jep.2022.115889] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 10/17/2022] [Accepted: 10/29/2022] [Indexed: 06/16/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Lauraceae family includes Nectandra angustifolia a species widely used in the folk medicine of South America against various maladies. It is commonly used to treat different types of processes like inflammation, pain, and snakebites. Snakes of the Bothrops genus are responsible for about 97% of the ophidic accidents in northeastern Argentina. AIM OF THE STUDY To evaluate the anti-snake activity of the phytochemicals present in N. angustifolia extracts, identify the compounds, and evaluate their inhibitory effect on phospholipase A2 (PLA2) with in vitro and in silico assays. METHODS Seasonal variations in the alexiteric potential of aqueous, ethanolic and hexanic extracts were evaluated by inhibition of coagulant, haemolytic, and cytotoxic effects of B. diporus venom. The chemical identity of an enriched fraction obtained by bio-guided fractioning was established by UPLC-MS/MS analysis. Molecular docking studies were carried out to investigate the binding mechanisms of the identified compounds to PLA2 enzyme from snake venom. RESULTS All the extracts inhibited venom coagulant activity. However, spring ethanolic extract achieved 100% inhibition of haemolytic activity. Bio-guide fractioning led to an enriched fraction (F4) with the highest haemolytic inhibition. Five flavonoids were identified in this fraction; molecular docking and Molecular Dynamics (MD) simulations indicated the binding mechanisms of the identified compounds. The carbohydrates present in some of the compounds had a critical effect on the interaction with PLA2. CONCLUSION This study shows, for the first time, which compounds are responsible for the anti-snake activity in Nectandra angustifolia based on in vitro and in silico assays. The results obtained in this work support the traditional use of this species as anti-snake in folk medicine.
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Affiliation(s)
- Ana María Torres
- Facultad de Ciencias Exactas y Naturales y Agrimensura, Universidad Nacional del Nordeste, Av. Libertad 5470, 3400, Corrientes, Argentina; Instituto de Química Básica y Aplicada del NEA - (IQUIBA-NEA-CONICET), Av. Libertad 5470, 3400, Corrientes, Argentina
| | - Gonzalo Adrián Ojeda
- Facultad de Ciencias Exactas y Naturales y Agrimensura, Universidad Nacional del Nordeste, Av. Libertad 5470, 3400, Corrientes, Argentina; Instituto de Química Básica y Aplicada del NEA - (IQUIBA-NEA-CONICET), Av. Libertad 5470, 3400, Corrientes, Argentina.
| | - Emilio Angelina
- Facultad de Ciencias Exactas y Naturales y Agrimensura, Universidad Nacional del Nordeste, Av. Libertad 5470, 3400, Corrientes, Argentina; Instituto de Química Básica y Aplicada del NEA - (IQUIBA-NEA-CONICET), Av. Libertad 5470, 3400, Corrientes, Argentina
| | - Soledad Bustillo
- Facultad de Ciencias Exactas y Naturales y Agrimensura, Universidad Nacional del Nordeste, Av. Libertad 5470, 3400, Corrientes, Argentina; Instituto de Química Básica y Aplicada del NEA - (IQUIBA-NEA-CONICET), Av. Libertad 5470, 3400, Corrientes, Argentina
| | - Nélida Peruchena
- Facultad de Ciencias Exactas y Naturales y Agrimensura, Universidad Nacional del Nordeste, Av. Libertad 5470, 3400, Corrientes, Argentina; Instituto de Química Básica y Aplicada del NEA - (IQUIBA-NEA-CONICET), Av. Libertad 5470, 3400, Corrientes, Argentina
| | - Loris Tonidandel
- Centro Trasferimento Tecnologico, Fondazione Edmund Mach di San Michele all'Adige, Via E. Mach 1, 38010-S, Michele all'Adige (TN), Italy
| | - Roberto Larcher
- Centro Trasferimento Tecnologico, Fondazione Edmund Mach di San Michele all'Adige, Via E. Mach 1, 38010-S, Michele all'Adige (TN), Italy
| | - Tiziana Nardin
- Centro Trasferimento Tecnologico, Fondazione Edmund Mach di San Michele all'Adige, Via E. Mach 1, 38010-S, Michele all'Adige (TN), Italy
| | - Eduardo Dellacassa
- Facultad de Química, Universidad de la República, Av General Flores 2124, 11800, Montevideo, Uruguay
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Ojeda GA, Sgroppo SC, Sánchez Moreno C, de Ancos Siguero B. Mango 'criollo' by-products as a source of polyphenols with antioxidant capacity. Ultrasound assisted extraction evaluated by response surface methodology and HPLC-ESI-QTOF-MS/MS characterization. Food Chem 2022; 396:133738. [PMID: 35872495 DOI: 10.1016/j.foodchem.2022.133738] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 07/11/2022] [Accepted: 07/15/2022] [Indexed: 01/12/2023]
Abstract
Ultrasound assisted extraction (UAE) was evaluated as a green procedure for the recovery of phenolic compounds with antioxidant capacity from underutilized mango 'criollo' (peel, pulp and seed). Magnetic stirred was performed as conventional extraction. Response surface methodology using a three-factor (% ethanol, amplitude and time) central composite design was used to maximize the extraction for total phenolic compounds (TPC), total flavonoids and antioxidant capacity. The operational conditions to maximize extraction were: peel, 46% ethanol/amplitude 60% (36 µm)/6.5 min; pulp, 25% ethanol/amplitude 75% (45 µm)/30 min; seed 49% ethanol/100% (60 µm) amplitude/20 min. The phenolic composition of the optimized extracts was characterized by HPLC-QTOF-MS/MS and 45 compounds were tentatively identified as xanthones (mangiferin), flavonoids (quercetin), ellagic acid, benzophenones (maclurin), gallate derivatives and gallotannins. UAE increased TPC extraction (33%); interestingly mangiferin extraction increased 53% in peel, similarly, ellagic acid increased up to 2.5 and 4.4 times in peel and seed extracts.
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Affiliation(s)
- Gonzalo Adrián Ojeda
- Laboratorio de Tecnología Química y Bromatología, FaCENA, Universidad Nacional del Nordeste, Av. Libertad 5400, Corrientes, Argentina.
| | - Sonia Cecilia Sgroppo
- Laboratorio de Tecnología Química y Bromatología, FaCENA, Universidad Nacional del Nordeste, Av. Libertad 5400, Corrientes, Argentina
| | - Concepción Sánchez Moreno
- Institute of Food Science, Technology and Nutrition (ICTAN), Spanish National Research Council (CSIC), José Antonio Novais 10, Madrid, Spain
| | - Begoña de Ancos Siguero
- Institute of Food Science, Technology and Nutrition (ICTAN), Spanish National Research Council (CSIC), José Antonio Novais 10, Madrid, Spain
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Franco RR, Ojeda GA, Rompato KM, Sgroppo SC. Effects of short-wave ultraviolet light, ultrasonic and microwave treatments on banana puree during refrigerated storage. FOOD SCI TECHNOL INT 2021; 29:50-61. [PMID: 34779305 DOI: 10.1177/10820132211058444] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Enzymatic browning is a major problem in minimally processed banana puree; it reduces consumeŕs acceptability and affects nutritional quality. The objective of this work was to evaluate the effects ultrasound (40 kHz/10 min), microwave (800 W/ 25 s) and UV-C radiation (1.97 kJ/m2) applied to banana puree. Colour parameters (L*, a*, b*, chroma and hue), browning index (BI), polyphenol oxidase (PPO) and peroxidase (POD) activities, total phenolic compounds (TPC), antioxidant capacity (AOC) and microbiological counts were monitored throughout storage at 4°C. Ultrasound (US) and microwave (MW) treatments achieved a significant (p < 0.05) reduction in PPO activity and BI; moreover, ultrasound effectively retained phenolic compounds content (75% of initial value). The AOC was in coincidence with TPC values. POD activity was partially inhibited by UV-C while MW and US increase its activity. Although UV-C treatment was not effective to control browning development, it was effective to maintain microbiological stability after 20 days of storage (1.48 ± 0.01 log CFU/g). The evaluated treatments have the advantage of being less aggressive than conventional thermal treatments while maintaining fresh characteristics of the product.
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Affiliation(s)
- Rodrigo Rubén Franco
- Laboratorio de Investigación en Microbiología y Alimentos, Facultad de Ciencias de la Salud, 28220Universidad Nacional de Formosa, Formosa, Argentina
| | - Gonzalo Adrián Ojeda
- Laboratorio de Tecnología Química (IQUIBA - CONICET), Facultad de Ciencias Exactas y Naturales y Agrimensura, 28248Universidad Nacional del Nordeste, Corrientes, Argentina
| | - Karina Mariela Rompato
- Laboratorio de Investigación en Microbiología y Alimentos, Facultad de Ciencias de la Salud, 28220Universidad Nacional de Formosa, Formosa, Argentina
| | - Sonia Cecilia Sgroppo
- Laboratorio de Tecnología Química (IQUIBA - CONICET), Facultad de Ciencias Exactas y Naturales y Agrimensura, 28248Universidad Nacional del Nordeste, Corrientes, Argentina
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