Browsing by Subject "Rosmarinic acid"

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    Antitumor activity of rosmarinic acid-loaded silk fibroin nanoparticles on HeLa and MCF-7 cells
    (MDPI, 2021-09-18) Fuster, Marta G.; Carissimi, Gúzmán; García Montalbán, Mercedes; Víllora Cano, Gloria; Ingeniería Química
    Rosmarinic acid (RA), one of the most important polyphenol-based antioxidants, has drawn increasing attention because of its remarkable bioactive properties, including anti-inflammatory, anticancer and antibacterial activities. The aim of this study was to synthesize and characterize RA-loaded silk fibroin nanoparticles (RA-SFNs) in terms of their physical–chemical features and composition, and to investigate their antitumor activity against human cervical carcinoma and breast cancer cell lines (HeLa and MCF-7). Compared with the free form, RA bioavailability was enhanced when the drug was adsorbed onto the surface of the silk fibroin nanoparticles (SFNs). The resulting particle diameter was 255 nm, with a polydispersity index of 0.187, and the Z-potential was −17 mV. The drug loading content of the RA-SFNs was 9.4 wt.%. Evaluation of the in vitro drug release of RA from RA-SFNs pointed to a rapid release in physiological conditions (50% of the total drug content was released in 0.5 h). Unloaded SFNs exhibited good biocompatibility, with no significant cytotoxicity observed during the first 48 h against HeLa and MCF-7 cancer cells. In contrast, cell death increased in a concentration-dependent manner after treatment with RA-SFNs, reaching an IC50 value of 1.568 and 1.377 mg/mL on HeLa and MCF-7, respectively. For both cell lines, the IC50 of free RA was higher. The cellular uptake of the nanoparticles studied was increased when RA was loaded on them. The cell cycle and apoptosis studies revealed that RA-SFNs inhibit cell proliferation and induce apoptosis on HeLa and MCF-7 cell lines. It is concluded, therefore, that the RA delivery platform based on SFNs improves the antitumor potential of RA in the case of the above cancers.
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    Antitumor Activity of Rosmarinic Acid-Loaded Silk Fibroin Nanoparticles on HeLa and MCF-7 Cells
    (MDPI, 2021-09-18) Fuster, M. G.; Carissimi, G.; Montalbán, M. G.; Víllora Cano, Gloria; Ingeniería Química; Facultad de Química
    Rosmarinic acid (RA), one of the most important polyphenol-based antioxidants, has drawn increasing attention because of its remarkable bioactive properties, including anti-inflammatory, anticancer and antibacterial activities. The aim of this study was to synthesize and characterize RA-loaded silk fibroin nanoparticles (RA-SFNs) in terms of their physical–chemical features and composition, and to investigate their antitumor activity against human cervical carcinoma and breast cancer cell lines (HeLa and MCF-7). Compared with the free form, RA bioavailability was enhanced when the drug was adsorbed onto the surface of the silk fibroin nanoparticles (SFNs). The resulting particle diameter was 255 nm, with a polydispersity index of 0.187, and the Z-potential was 􀀀17 mV. The drug loading content of the RA-SFNs was 9.4 wt.%. Evaluation of the in vitro drug release of RA from RA-SFNs pointed to a rapid release in physiological conditions (50% of the total drug content was released in 0.5 h). Unloaded SFNs exhibited good biocompatibility, with no significant cytotoxicity observed during the first 48 h against HeLa and MCF-7 cancer cells. In contrast, cell death increased in a concentration-dependent manner after treatment with RA-SFNs, reaching an IC50 value of 1.568 and 1.377 mg/mL on HeLa and MCF-7, respectively. For both cell lines, the IC50 of free RA was higher. The cellular uptake of the nanoparticles studied was increased when RA was loaded on them. The cell cycle and apoptosis studies revealed that RA-SFNs inhibit cell proliferation and induce apoptosis on HeLa and MCF-7 cell lines. It is concluded, therefore, that the RA delivery platform based on SFNs improves the antitumor potential of RA in the case of the above cancers.
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    Assessment of Rosemary (Rosmarinus officinalis L.) Extract as Antioxidant in Jelly Candies Made with Fructan Fibres and Stevia
    (MDPI, 2020-12-16) Cedeño-Pino, Cristina; Martínez-Tomé, Magdalena; Murcia, María Antonia; Jordán, María José; Bañón, Sancho; Martínez-Tomé, Magdalena; Bañón, Sancho; Tecnología de Alimentos, Nutrición y Bromatología
    Enrichment with rosemary antioxidants is proposed as a possible strategy to obtain healthier jelly candies. Two aqueous rosemary extracts (RE) containing 73.9 (RE74) and 145.6 (RE146)mg polyphenols per g freshweightwere assessed as antioxidants in jelly candies based on fructooligosaccharides, inulin and stevia. Up to 15 phenolic acids, flavonoids and diterpeneswere determined in the extracts,with rosmarinic acid as the main active compound. Sensory tolerance, physical properties, rosmarinic acid recovery, polyphenol content, and antioxidant capacity were determined in jelly candies. The threshold of sensory detection was established at 0.26 g RE146/kg of raw candy, below which rosemary off-flavours were avoided without altering pH, brix, texture, CIELab colour, and consumer acceptance. Adding 0.26 g RE146 per kg increased (p < 0.001) polyphenol content from197 to 411 g GAE/g and the antioxidant capacity from 1.77 to 4.14 mol Trolox/g. Rosemary polyphenols resulted in being resistant to cooking, acted as secondary antioxidants and showed good interaction with the other jelly ingredients. Aqueous extracts from rosemary distillation by-products can be incorporated at acceptable levels to jelly candy formulations leading to higher oxidative stability and an increased content of dietary polyphenols.
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    Revalorisation of Sage (Salvia lavandulifolia Vahl) By-Product Extracts as a Source of Polyphenol Antioxidants for Novel Jelly Candies
    (2023-01-10) Cedeño-Pinos, Cristina; Martínez-Tomé, Magdalena; Jordán, María José; Bañón, Sancho; Bañón, Sancho; Martínez-Tomé, Magdalena; Tecnología de Alimentos, Nutrición y Bromatología
    Sage (Salvia lavandulifolia Vahl) aqueous extracts (SE) obtained from distillation by-products were assessed as antioxidants for nutritionally enhanced jelly candies. Two experimental SEs with a different content of phenolic acids and flavonoids were tested: (i) SE38 (37.6 mg/g) and (ii) SE70 (69.8 mg/g), with salvianic and rosmarinic acids as main polyphenols, respectively. Flavour alteration, stability of sage polyphenols, physical quality traits and antioxidant capacity (AC) were studied in strawberry candies formulated without sugars and enriched with SEs at 0.25, 0.50 and 0.75 g/kg. Despite their different quantitative composition, SE38 and SE70 provided similar antioxidant properties, which were dose dependent. Salvianic and rosmarinic acids were stable without degrading to candy processing (up to 80 °C), keeping their antioxidant potential. There were no relevant differences in flavour or physical traits (pH, °Brix and CIELab colour) between untreated and SE-enriched strawberry candies. The addition of 0.75 g SE/kg resulted in relevant increases of candy AC: (i) from 30 to 38 mg GAE/100 g (total phenolics); (ii) from 10 to 17 mg TE/100 g (DPPH• radical scavenging assay); (iii) from 5 to 13 mg TE/100 g (ABTS·+ radical scavenging assay); (iv) from 84 to 163 µmol Fe2+/100 g (FRAP capacity) and (v) from to 75 to 83% (inhibition of deoxyribose damage). Sage distillation by-products can be revalorised as a source of natural antioxidants to produce healthier candies.
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    Rosmarinic acid inhibits the proliferation of ovarian carcinoma cells by activating the p53/BAX signaling pathway
    (Universidad de Murcia, Histología e Histopatología, 2025) Özdemır İlhan; Doğan Baş Dilek; Öztürk Şamil; Karaosmanoğlu Özge; Cudi Tuncer Mehmet; Biología Celular e Histología
    Objective. While chemotherapeutic agents stop the development of cancer cells, they also kill healthy cells. This study aimed to increase anticancer effects and reduce side effects by combining a phytotherapeutic compound with a chemotherapeutic drug. Methods. This study examined the effects of nine concentrations of rosmarinic acid (RA) and doxorubicin (DOX) on human ovarian adenocarcinoma (OVCAR3) and skin keratinocyte (HaCaT) cell lines. Their cytotoxic effects were assessed based on cell viability, evaluated using the MTT assay, and apoptotic activity, evaluated using NucBlue staining and the gene and protein expression of tumor protein p53 (TP53) and BCL2 associated X, apoptosis regulator (BAX) quantified by qRT-PCR and western blots, respectively. Results. The half-maximal inhibitory concentration after 48 hours was 880.4 μM for RA and 2.26 μM for DOX. The cytotoxicity analysis revealed that cell viability decreased with the RA concentration. RA increased apoptosis in OVCAR3 cells by activating the p53/BAX pathway. Western blots showed that RA and DOX upregulated p53 and BAX protein levels in OVCAR3 cells. Conclusions. The RA and DOX combination inhibited cell proliferation by inducing apoptosis in OVCAR3 cells. These results suggest that RA may reduce the side effects of DOX toxicit