Ana Margarida Silva

Mrs. Ana Margarida Silva

REQUIMTE/LAQV, Polytechnic of Porto – School of Engineering, Rua Dr. António Bernardino de Almeida, 4249-015 Porto, Portugal
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Research Focus & Metrics

Academic Career Length

8Years (2019-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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FTFilipa Teixeira
Filipa Teixeira
Ana Margarida SilvaAna Margarida Silva
Ana Margarida Silva
Cristina Delerue-MatosCristina Delerue-Matos
Cristina Delerue-Matos
Francisca RodriguesFrancisca Rodrigues
Francisca Rodrigues
Lycium barbarum L. is a species widely used in dietary supplements and natural healthcare products. The berries, also known as goji or wolfberries, mostly grow in China, but recent reports on their outstanding bioactive properties have increased their popularity and cultivation around the world. Goji berries are a remarkable source of phenolic compounds (such as phenolic acids and flavonoids), carotenoids, organic acids, carbohydrates (fructose and glucose), and vitamins (ascorbic acid). Several biological activities, such as antioxidant, antimicrobial, anti-inflammatory, prebiotic, and anticancer activities, have been associated with its consumption. Hence, goji berries were highlighted as an excellent source of functional ingredients with promising applications in food and nutraceutical fields. This review aims to summarize the phytochemical composition and biological activities, along with various industrial applications, of L. barbarum berries. Simultaneously, the valorization of goji berries by-products, with its associated economic advantages, will be emphasized and explored.

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AFAna Sofia Ferreira
Ana Sofia Ferreira
CMCatarina Pinheiro Macedo
Catarina Pinheiro Macedo
Ana Margarida SilvaAna Margarida Silva
Ana Margarida Silva
Cristina Delerue-MatosCristina Delerue-Matos
Cristina Delerue-Matos
PCPaulo Jorge Cardoso da Costa
Paulo Jorge Cardoso da Costa
Francisca RodriguesFrancisca Rodrigues
Francisca Rodrigues
Cancer, a major world public health problem, is associated with chemotherapy treatments whose administration leads to secondary concerns, such as oral mucositis (OM). The OM disorder is characterized by the presence of ulcers in the oral mucosa that cause pain, bleeding, and difficulty in ingesting fluids and solids, or speaking. Bioactive compounds from natural sources have arisen as an effective approach for OM. This review aims to summarize the new potential application of different natural products in the prevention and treatment of OM in comparison to conventional ones, also providing a deep insight into the most recent clinical studies. Natural products, such as Aloe vera, Glycyrrhiza glabra, Camellia sinensis, Calendula officinalis, or honeybee crops, constitute examples of sources of bioactive compounds with pharmacological interest due to their well-reported activities (e.g., antimicrobial, antiviral, anti-inflammatory, analgesic, or wound healing). These activities are associated with the bioactive compounds present in their matrix (such as flavonoids), which are associated with in vivo biological activities and minimal or absent toxicity. Finally, encapsulation has arisen as a future opportunity to preserve the chemical stability and the drug bioa vailability of bioactive compounds and, most importantly, to improve the buccal retention period and the therapeutic effects.

13 January 2022 in Pharmaceutics
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MTMaria Inês Teixeira
Maria Inês Teixeira
Carla M. LopesCarla M. Lopes
Carla M. Lopes
HGHugo Manuel Castro Gonçalves
Hugo Manuel Castro Gonçalves
José CatitaJosé Catita
José Catita
Ana Margarida SilvaAna Margarida Silva
Ana Margarida Silva
PCPaulo Jorge Cardoso da Costa
Paulo Jorge Cardoso da Costa
Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disease with a very poor prognosis. Its treatment is hindered by a lack of new therapeutic alternatives and the existence of the blood–brain barrier (BBB), which restricts the access of drugs commonly used in ALS, such as riluzole, to the brain. To overcome these limitations and increase brain targeting, riluzole-loaded nanostructured lipid carriers (NLC) were prepared and functionalized with lactoferrin (Lf), facilitating transport across the BBB by interacting with Lf receptors expressed in the brain endothelium. NLC were characterized with respect to their physicochemical properties (size, zeta potential, polydispersity index) as well as their stability, encapsulation efficiency, morphology, in vitro release profile, and biocompatibility. Moreover, crystallinity and melting behavior were assessed by DSC and PXRD. Nanoparticles exhibited initial mean diameters between 180 and 220 nm and a polydispersity index below 0.3, indicating a narrow size distribution. NLC remained stable over at least 3 months. Riluzole encapsulation efficiency was very high, around 94–98%. FTIR and protein quantification studies confirmed the conjugation of Lf on the surface of the nanocarriers, with TEM images showing that the functionalized NLC presented a smooth surface and uniform spherical shape. An MTT assay revealed that the nanocarriers developed in this study did not cause a substantial reduction in the viability of NSC-34 and hCMEC/D3 cells at a riluzole concentration up to 10 μM, being therefore biocompatible. The results suggest that Lf-functionalized NLC are a suitable and promising delivery system to target riluzole to the brain.


21 May 2021 in Applied Sciences
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Ana Margarida SilvaAna Margarida Silva
Ana Margarida Silva
João Pedro LagoJoão Pedro Lago
João Pedro Lago
DPDiana Pinto
Diana Pinto
Manuela M. MoreiraManuela M. Moreira
Manuela M. Moreira
CGClara Grosso
Clara Grosso
Francisca RodriguesFrancisca Rodrigues
Francisca Rodrigues
Salicornia ramosissima J.Woods is an edible halophyte, widely distributed in the Portuguese salt marsh that has been under valorized. The aim of this study is to expand the knowledge regarding S. ramosissima bioactive composition and safety, highlighting its potential use as nutraceutical ingredient. Therefore, extracts obtained by conventional (CE) and microwave-assisted extraction (MAE) were characterized regarding phenolic profile, antioxidant activity, radical scavenging capacity and intestinal cell effects. Moreover, organic pesticides were screened to guarantee the consumers safety. The highest phenolic and flavonoid contents were observed for the CE, as well as the scavenging capacity of O2•− (IC50 = 979.36 µg/mL) and HOCl (IC50 = 90.28 µg/mL). In contrast, the best antioxidant and antiradical activities were achieved by MAE (65.56 µmol FSE/g dw and 17.74 µg AAE/g dw for FRAP and ABTS assays, respectively). The phenolic composition was similar for both extracts, being characterized by the presence of phenolic acids, flavonols, flavanols, flavones and flavanones. The predominant compound for both extracts was myricetin. None of the extracts were cytotoxic in intestinal cell lines. Vestigial levels of β-endosulfan and p,p’-DDE were identified in MAE. These results support that S. ramosissima could be a source of bioactive compounds for nutraceutic industry.

1 October 2021 in Trends in Food Science & Technology
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Ana Margarida SilvaAna Margarida Silva
Ana Margarida Silva
PCPaulo Jorge Cardoso da Costa
Paulo Jorge Cardoso da Costa
CDCristina Delerue-Matos
Cristina Delerue-Matos
Piotr LatochaPiotr Latocha
Piotr Latocha
Francisca RodriguesFrancisca Rodrigues
Francisca Rodrigues