Navegando por Autor "Xiong, Jia"

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Blueberry polyphenol-protein food ingredients: the impact of spray drying on the in vitro antioxidant activity, anti-inflammatory markers, glucose metabolism and fibroblast migration
(Elsevier, 2019-05) Hoskin, Roberta Targino; Xiong, Jia; Esposito, Debora Araújo; Lila, Mary Ann
Wild blueberry pomace extract complexed with wheat or chickpea flour or soy protein isolate produced spray dried and freeze-dried polyphenol-protein particles. To evaluate the impact of spray drying on the biological activity of these food ingredients in vitro antioxidant and anti-inflammatory activities, regulation of glucose metabolism and ability to stimulate fibroblast migration were tested. Extracts from polyphenol-protein particles significantly decreased reactive oxygen species (ROS) production and down-regulated the gene expression of inflammation markers (COX-2 and IL-1β). Milder suppression of nitric oxide production and inducible nitric oxide synthase (iNOS) gene expression was evident. The extracts significantly inhibited phosphoenolpyruvate carboxykinase (PEPCK) and accelerated fibroblast cell migration up to 3-fold after 24 h. Complexed polyphenols retained their structural integrity and bioactive potency for both lyophilized and spray dried treatments. The data suggests that spray drying is a convenient and cost-effective technique to produce blueberry-polyphenol food ingredients with preserved phytochemicals with biological activities
Comparison of berry juice concentrates and pomaces and alternative plant proteins to produce spray dried protein–polyphenol food ingredients
(Royal Society of Chemistry, 2019) Hoskin, Roberta Targino; Xiong, Jia; Lila, Mary Ann
Spray dried functional food ingredients were prepared by complexing alternative plant protein sources – buckwheat flour alone or blended with pea and rice proteins, with polyphenol sources – blueberry, cranberry and purple muscadine grape extracts from juice concentrates and pomaces – to create colloidal aggregate powders. When fruit pomaces (rather than juice concentrates) were used as polyphenol resources, solid recovery was significantly enhanced, especially for matrices made with pea protein, buckwheat flour or pea–buckwheat blends (over two fold for pea protein–berry pomace aggregates). Polyphenol content and DPPH radical scavenging capacity were, in general, significantly greater for pomace-derived protein–polyphenol aggregates compared to those made with juice concentrates. In particular, the particles produced with muscadine grape pomace presented the highest (p < 0.05) phenolic content (147.3–174.3 mg g−1, 19.4–20.4 mg g−1 and 16.3–21.4 mg g−1 for total phenolic content, anthocyanins and proanthocyanidins respectively), and antioxidant activity (408.9–423.3 μmol TE per g) as well as good spray drying yield (38.6–63.4%). Buckwheat flour, despite its relatively low protein content (13.7%) relative to pea and rice protein isolates (84% and 89%, respectively) still demonstrated high capacity for sorption of flavonoid phytoactive compounds from the berry fruits. These results suggest an efficient plant-based approach to produce value-added protein–polyphenol aggregates with broad utility as healthy food ingredients
Phytochemical content, antioxidant, anti-inflammatory activities and wound healing properties of freeze-dried fruits
(Acta Scientific Nutritional Health, 2020-01-01) Moraes, Francisca Pereira de; Xiong, Jia; Borges, Katia Cristina; Hoskin, Roberta Targino; Esposito, Debora
This work evaluated the phytochemical composition of freeze-dried acerola, camu-camu, apple and pineapple extracts, and correlated it with their cell-based in vitro antioxidant, anti-inflammatory and wound healing activities. All freeze-dried fruit extracts at 50 µm/mL significantly inhibited (p<0.001) reactive oxygen species (ROS) up to 70%, but only acerola and camu-camu extracts at 150 µm/mL decreased (p<0.001) the nitric oxide (NO) production (up to 33%) in LPS-stimulated RAW 264.7 macrophages. When selected mRNA biomarkers of acute inflammation were evaluated, all freeze-dried fruit extracts inhibited the expression of IL-6 and IL-1β genes, but only acerola reduced the COX-2 expression (p<0.01). In addition, freeze-dried acerola extract (50 µm/mL) significantly enhanced human dermal fibroblasts (HDFa) migration by 1.5-fold compared to the control after 36 h. Based on our results, we hypothesize that the high concentration of ascorbic acid (9454.3 mg/100 g) and anthocyanin contents (14.0 mg /100 g) of freezedried acerola may play an important role on the in vitro biological results
Whey and soy proteins as wall materials for spray drying rosemary: effects on polyphenol composition, antioxidant activity, bioaccessibility after in vitro gastrointestinal digestion and stability during storage
(Elsevier, 2021-09) Grace, Mary Halim; Hoskin, Roberta Targino; Xiong, Jia; Lila, Mary Ann
A straightforward protocol was developed to produce rosemary particles using whey and soy protein carriers. The post-processing retention of carnosic acid (CA), carnosol (CR) and rosmarinic acid (RA), their bioaccessibility, in vitro antioxidant activity, and storage stability were investigated in protein-rosemary particles compared to rosemary extract (RME). Solids recovery was highest for whey protein or whey-inulin blend complexed with rosemary (R–WPI, R–WIN, ~90%), followed by soy protein or soy-inulin (R–SPI, R–SIN, 60% and 70%); all were higher than rosemary alone (RME, 52%). Protein or protein/inulin carriers significantly enhanced retention of CR (36.8–50.7 mg/g) and CA (17.1–19.6 mg/g) compared to RME (19.8 mg/g and 8.3 mg/g, respectively). In vitro digestibility showed that whey protein isolate increased the bioaccessibility of CA and CR, with no effect on RA, which was highly bioaccessible in all formulations. The rosemary-protein-treatments retained high antioxidant activity measured by ROS and NO assays. CR and CA were particularly stable during 20 weeks of storage in protein-rosemary particles, and stayed at their higher concentration compared to RME. Water activity was below 0.5 and remarkable color stability was observed during storage. Overall, spray dried protein-rosemary particles constitute a creative solution to deliver preserved phytochemicals in a high-protein food format

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Navegando por Autor "Xiong, Jia"