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1.
Food Funct ; 15(8): 4051-4064, 2024 Apr 22.
Artigo em Inglês | MEDLINE | ID: mdl-38535983

RESUMO

This study evaluated the nutritional profile and fiber content of innovative formulations of wheat-based biscuits enriched with chia seeds, carob flour and coconut sugar. The in vitro antioxidant, cytotoxic, anti-inflammatory and antimicrobial activities were also investigated to understand the potential health advantages of the incorporation of these new ingredients. The novel biscuits demonstrated significant improvements in protein and mineral content, with increases of 50% and 100% in chia biscuits, and up to 20% and 40% in carob biscuits, respectively. Fiber also notably increased, particularly in samples containing 10% carob flour, which increased four times as compared to wheat-based samples. The new ingredients exhibited antibacterial and antifungal activity, particularly against Yersinia enterocolitica (minimum inhibitory concentration 1.25 mg mL-1 in coconut sugar) and Aspergillus fumigatus (minimum inhibitory concentration/minimum fungicidal concentrations 2.5/5 mg mL-1 in chia seeds). However, the final biscuits only displayed antifungal properties. Carob flour and chia seeds had a remarkably high capacity to inhibit the formation of TBARS and promoted greater antioxidant activity in biscuit formulations, with EC50 values decreasing from 23.25 mg mL-1 (control) to 4.54 mg mL-1 (15% defatted ground chia seeds) and 1.19 mg mL-1 (10% carob flour). Only chia seeds exhibited cellular antioxidant, anti-inflammatory and cytotoxic activity, attributes that were lost when seeds were added into the biscuits. These findings highlight the potential health benefits of these ingredients, particularly when incorporated in new wheat-based formulations.


Assuntos
Antioxidantes , Fibras na Dieta , Farinha , Galactanos , Mananas , Valor Nutritivo , Triticum , Triticum/química , Fibras na Dieta/análise , Fibras na Dieta/farmacologia , Antioxidantes/farmacologia , Antioxidantes/química , Farinha/análise , Sementes/química , Gomas Vegetais/química , Gomas Vegetais/farmacologia , Anti-Infecciosos/farmacologia , Salvia/química , beta-Glucanas/farmacologia , beta-Glucanas/química , Anti-Inflamatórios/farmacologia , Anti-Inflamatórios/química , Pão/análise , Antibacterianos/farmacologia , Antibacterianos/química , Goma Arábica/química , Goma Arábica/farmacologia , Animais , Testes de Sensibilidade Microbiana , Humanos
2.
Nutrients ; 15(19)2023 Oct 03.
Artigo em Inglês | MEDLINE | ID: mdl-37836536

RESUMO

Partially hydrolyzed guar gum (PHGG) is a soluble dietary fiber that is effective for defecation control. It influences the gut microbiota, by which it is metabolized to yield short-chain fatty acids (SCFAs), and it was also recently shown to protect against influenza infection in humans. We here investigated the effects of PHGG in a mouse model of influenza H1N1 virus infection. Eight-week-old C57BL/6 mice were fed normal chow with or without PHGG (500 mg/kg per day) for 4 weeks, infected with H1N1 at 10 weeks of age, and analyzed at 12 weeks of age. Administration of PHGG attenuated the decline in body weight induced by H1N1 infection without affecting food intake. It also ameliorated intestinal atrophy and increased the production of SCFAs including acetic acid, propionic acid, and butyric acid in the cecum, thereby preventing the inhibitory effect of H1N1 infection on SCFA production. The H1N1-induced increases in the serum concentrations of inflammatory cytokines including interferon-γ and interleukin-6 and anti-inflammatory cytokine such as interleukin-10 were all inhibited by PHGG intake. In addition, PHGG administration attenuated inflammatory gene expression in the lung and promoted both natural killer cell activity and regulatory T-cell differentiation in the spleen. Our findings suggest that the consumption of PHGG may improve the gut environment and thereby limit the inflammatory response to H1N1 infection. They may thus provide the basis for novel dietary intervention strategies to suppress the excessive inflammation associated with virus infection.


Assuntos
Doenças Transmissíveis , Microbioma Gastrointestinal , Vírus da Influenza A Subtipo H1N1 , Influenza Humana , Infecções por Orthomyxoviridae , Humanos , Camundongos , Animais , Camundongos Endogâmicos C57BL , Inflamação/tratamento farmacológico , Inflamação/metabolismo , Galactanos/farmacologia , Mananas/farmacologia , Gomas Vegetais/farmacologia , Ácidos Graxos Voláteis/metabolismo , Fibras na Dieta/farmacologia
3.
J Sci Food Agric ; 103(10): 5165-5170, 2023 Aug 15.
Artigo em Inglês | MEDLINE | ID: mdl-36914415

RESUMO

BACKGROUND: The intestinal epithelium acts as a barrier against harmful luminal materials, thus preventing intestinal diseases and maintaining intestinal health. Heat shock protein 27 (HSP27) promotes intestinal epithelial integrity under both physiological and stressed conditions. The effects of partially hydrolyzed guar gum (PHGG) on HSP27 expression in intestinal Caco-2 cells and mouse intestines were investigated. RESULTS: The present study showed that PHGG upregulated HSP27 expression in Caco-2 cells without upregulating Hspb1, the gene encoding HSP27. Feeding PHGG increased HSP25 expression in epithelial cells of the small intestine of mice. Inhibition of protein translation using cycloheximide suppressed PHGG-mediated HSP27 expression, indicating that PHGG upregulated HSP27 via translational modulation. Signaling inhibition of the mechanistic target of rapamycin (mTOR) and phosphatidyl 3-inositol kinase reduced PHGG-mediated HSP27 expression, whereas mitogen-activated protein kinase kinase inhibition by U0126 increased HSP27 expression, irrespective of PHGG administration. PHGG increases mTOR phosphorylation and reduces extracellular signal-regulated protein kinase (ERK) phosphorylation. CONCLUSION: PHGG-mediated translation of HSP27 in intestinal Caco-2 cells and mouse intestine via the mTOR and ERK signaling pathways may promote intestinal epithelial integrity. These findings help us better understand how dietary fibers regulate the physiological function of the intestines. © 2023 Society of Chemical Industry.


Assuntos
Proteínas de Choque Térmico HSP27 , Intestinos , Humanos , Camundongos , Animais , Células CACO-2 , Proteínas de Choque Térmico HSP27/genética , Galactanos/farmacologia , Mananas/farmacologia , Gomas Vegetais/farmacologia , Serina-Treonina Quinases TOR/genética
4.
Int J Biol Macromol ; 228: 594-603, 2023 Feb 15.
Artigo em Inglês | MEDLINE | ID: mdl-36563812

RESUMO

The aim of the present work was to modify the exuded gum of Sterculia striata tree by an amination reaction. The viscosity and zero potential of the chicha gum varied as a function of pH. The modification was confirmed by X-ray diffraction (XRD), infrared spectroscopy (FTIR), size exclusion chromatography (SEC), zeta potential, thermogravimetric analysis (TG), and differential scanning calorimetry (DSC). Furthermore, the chemical modification changed the molar mass and surface charge of the chicha gum. In addition, the gums were used in tests for ex vivo mucoadhesion strength, antibacterial activity against the standard strain of Staphylococcus aureus (ATCC 25923), inhibitory activity of α-glucosidase, antioxidant capacity, and viability of Caco-2 cells. Through these tests, it was found that amination caused an increase in the mucoadhesive and inhibitory activity of chicha gum against the bacterium Staphylococcus aureus. In addition, the gums (pure and modified) showed antioxidant capacity and an inhibitory effect against the α-glucosidase enzyme and did not show cytotoxic potential.


Assuntos
Antioxidantes , alfa-Glucosidases , Humanos , Antioxidantes/farmacologia , Células CACO-2 , Antibacterianos/farmacologia , Antibacterianos/química , Difração de Raios X , Gomas Vegetais/farmacologia , Gomas Vegetais/química , Espectroscopia de Infravermelho com Transformada de Fourier
5.
Int J Biol Macromol ; 222(Pt A): 1037-1047, 2022 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-36181882

RESUMO

A 56-day feeding trial was conducted to assess the effects of different viscous guar gum on the growth, intestinal flora, and intestinal health of Micropterus salmoides. Four practical diets with 42.5 % crude protein and 13.7 % crude lipid were formulated to contain 8 % cellulose and three different viscosities (2500, 5200, and 6000 mPa·s) of guar gum. Dietary guar gum inhibits fish growth and feed utilization, decreases the α-diversity of the intestinal flora, and negatively alters the intestinal flora structure and metabolite composition. High viscous guar gum down-regulated the intestinal tight junction, anti-inflammatory, and anti-apoptotic related gene's expression, decreased digesta butyrate/histamine ratio; and increased the abundance of Plesiomonas shigelloides. These results suggest that dietary guar gum adversely affects intestinal health by disrupting intestinal flora structure and metabolite composition, and that viscosity should be considered when using guar gum as a binder in aquafeeds.


Assuntos
Bass , Microbioma Gastrointestinal , Animais , Viscosidade , Galactanos/química , Gomas Vegetais/farmacologia , Gomas Vegetais/química , Mananas/química , Fibras na Dieta
6.
Molecules ; 27(12)2022 Jun 09.
Artigo em Inglês | MEDLINE | ID: mdl-35744846

RESUMO

Plant gums are bio-organic substances that are derived from the barks of trees. They are biodegradable and non-adverse complex polysaccharides that have been gaining usage in recent years due to a number of advantages they contribute to various applications. In this study, gum was collected from Moringa oleifera and Azadirachta indica trees, then dried and powdered. Characterizations of gum polysaccharides were performed using TLC, GC-MS, NMR, etc., and sugar molecules such as glucose and xylose were found to be present. Effects of the gums on Abelmoschus esculentus growth were observed through root growth, shoot growth, and biomass content. The exposure of the seeds to the plant gums led to bio stimulation in the growth of the plants. Poor quality soil was exposed to the gum polysaccharide, where the polysaccharide was found to improve soil quality, which was observed through soil analysis and SEM analysis of soil porosity and structure. Furthermore, the plant gums were also found to have bio-pesticidal activity against mealybugs, which showed certain interstitial damage evident through histopathological analysis.


Assuntos
Azadirachta , Moringa oleifera , Praguicidas , Moringa oleifera/química , Gomas Vegetais/química , Gomas Vegetais/farmacologia , Plantas , Polissacarídeos/química , Polissacarídeos/farmacologia , Solo
7.
Int J Biol Macromol ; 211: 57-73, 2022 Jun 30.
Artigo em Inglês | MEDLINE | ID: mdl-35576698

RESUMO

Nosocomial bacterial infections associated with biofilms inspire to explore newer bactericidal strategy with eco-friendly biomaterials as sustainable alternatives. In this research work, we successfully developed bio-safe films from kojic acid(KA) and guar gum propionate(GGP) for Escherichia coli biofilm disruption and planktonic cell killing. High DS(degree of substitution = 1.52) GGP was synthesized from guar gum (GG)assisted by chaotropic ions at room-temperature. Biopolymers were routinely characterized in CHN analyzer, FT-IR, TGA and XRD analysis. KA loaded GGP films were prepared by cross-linking the molecules in presence of epichlorhydrin and two different percentages of KA were employed. Film physical and tensile properties were systematically evaluated and optimized. Water vapour permeability (WVP) and tensile strength of final film GGPFK10 were recorded at 0.741 ± 0.09gmm-1kPa-1h-1 and 19.23 MPa. KA release from GGP matrix followed controlled diffusion process. MIC of GGP was 130 µg/mL and zone of inhibition of GGPFK10 was confirmed at 16.1 mm. SEM experiments disclosed the absence of pili-like structures with squeezed and elongated cellular morphology in dead planktonic cells. Disruption of biofilms was experimented in detail by CV assay, fluorescent, light microscopic and SEM studies. The film showed excellent cell-viability on human adult dermal fibroblast (HADF)cell-line. Overall, the biosafe film would be a potent antibacterial device for treating infections against E.coli biofilms and planktonic cells.


Assuntos
Escherichia coli , Propionatos , Adulto , Antibacterianos/química , Antibacterianos/farmacologia , Biofilmes , Galactanos/química , Galactanos/farmacologia , Humanos , Mananas/química , Mananas/farmacologia , Plâncton , Gomas Vegetais/química , Gomas Vegetais/farmacologia , Pironas , Espectroscopia de Infravermelho com Transformada de Fourier
8.
Nutrients ; 14(6)2022 Mar 09.
Artigo em Inglês | MEDLINE | ID: mdl-35334814

RESUMO

Partially hydrolyzed guar gum (PHGG) is a soluble dietary fiber derived through controlled enzymatic hydrolysis of guar gum, a highly viscous galactomannan derived from the seeds of Cyamopsis tetragonoloba. Here, we examined the therapeutic potential of dietary supplementation with PHGG against sarcopenic obesity using Db/Db mice. Db/Db mice fed a normal diet alone or a fiber-free diet, or supplemented with a diet containing PHGG (5%), were examined. PHGG increased grip strength and the weight of skeletal muscles. PHGG increased the short-chain fatty acids (SCFAs) concentration in feces and sera. Concerning innate immunity, PHGG decreased the ratio of inflammatory cells, while increasing the ratio of anti-inflammatory cells in the small intestine. The present study demonstrated the preventive effect of PHGG on sarcopenic obesity. Changes in nutrient absorption might be involved through the promotion of an anti-inflammatory shift of innate immunity in the intestine accompanied by an increase in SCFA production by PHGG.


Assuntos
Sarcopenia , Animais , Galactanos/farmacologia , Galactanos/uso terapêutico , Mananas , Camundongos , Obesidade/tratamento farmacológico , Gomas Vegetais/farmacologia , Gomas Vegetais/uso terapêutico , Sarcopenia/tratamento farmacológico , Sarcopenia/prevenção & controle
9.
Int J Biol Macromol ; 193(Pt B): 1972-1985, 2021 Dec 15.
Artigo em Inglês | MEDLINE | ID: mdl-34748787

RESUMO

Natural polymers are an efficient class of eco-friendly and biodegradable polymers, because they are readily available, come from natural sources, inexpensive and can be chemically modified with the correct reagents. Guar gum (GG) is a natural polymer with great potential to be used in pharmaceutical formulations due to its unique composition and lack of toxicity. GG can be designed to suit the needs of the biological and medical engineering sectors. In the development of innovative drug delivery systems, GG is commonly utilized as a rate-controlling excipient. In this review, different properties of GG including chemical composition, extraction methods and its usefulness in diabetes, cholesterol lowering, weight control, tablet formulations as well as its food application were discussed. The other purpose of this study is to evaluate potential use of GG and its derivatives for advanced nanomedicine such as drug delivery, tissue engineering and nanosensing. It should be noted that some applicable patents in medical area have also been included in the rest of this survey to extend knowledge about guar gum and its polymeric nature.


Assuntos
Cyamopsis/química , Galactanos/química , Galactanos/farmacologia , Mananas/química , Mananas/farmacologia , Gomas Vegetais/química , Gomas Vegetais/farmacologia , Animais , Humanos , Nanomedicina/métodos
10.
Phytother Res ; 35(9): 5125-5132, 2021 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-34378260

RESUMO

Osteoarthritis is the most common cause of disability and aging is the major risk factor. One of the low-risk herbal medicines for reducing pain and inflammation in persian medicine is Pistacia atlantica gum. A triple-blind placebo-controlled clinical trial was performed in order to evaluate the efficacy of P. atlantica gum ointment on knee osteoarthritis in elderly people. A total of 60 patients were randomly allocated to two groups. The intervention group used 4% P. atlantica ointment and the control group used placebo, topically applied three times a day, for 8 weeks. The patients were evaluated before and after the intervention using the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) scale. There were significant differences (p < .001) between two the groups in terms of joint stiffness and pain as well as function. Within groups, regarding the effect size (EF) in joint stiffness was 2.82 and 0.74 in the Pistacia and placebo groups, respectively. Regarding pain, the effect size of the intervention and placebo groups were 3.90 and 0.99, respectively. In addition, regarding function, the effect size of the intervention and the placebo groups were 4.33 and 1.17, respectively. Therefore, it seems that topical P. atlantica is significantly better than the placebo in the old patients with knee osteoarthritis.


Assuntos
Osteoartrite do Joelho , Pistacia , Gomas Vegetais/farmacologia , Idoso , Método Duplo-Cego , Humanos , Medicina Tradicional , Osteoartrite do Joelho/tratamento farmacológico , Medição da Dor , Pistacia/química , Resultado do Tratamento
11.
Molecules ; 26(13)2021 Jun 30.
Artigo em Inglês | MEDLINE | ID: mdl-34209325

RESUMO

Polysaccharides can form interfacial complexes with proteins to form emulsions with enhanced stability. We assessed the effect of adding gum guar or gum arabic to egg yolk/fish oil emulsions. The emulsions were produced using simple or high-pressure homogenization, stored for up to 10 days at 45 °C, and characterized for their particle size and distribution, viscosity, encapsulation efficiency, oxidative stability, and cytotoxicity. Emulsions containing gum guar and/or triglycerides had the highest viscosity. There was no significant difference in the encapsulation efficiency of emulsions regardless of the polysaccharide used. However, emulsions containing gum arabic displayed a bridging flocculation effect, resulting in less stability over time compared to those using gum guar. Emulsions produced using high-pressure homogenization displayed a narrower size distribution and higher stability. The formation of peroxides and propanal was lower in emulsions containing gum guar and was attributed to the surface oil. No significant toxicity toward Caco-2 cells was found from the emulsions over time. On the other hand, after 10 days of storage, nonencapsulated fish oil reduced the cell viability to about 80%. The results showed that gum guar can increase the particle stability of egg yolk/fish oil emulsions and decrease the oxidation rate of omega-3 fatty acids.


Assuntos
Gema de Ovo/química , Óleos de Peixe/química , Galactanos/química , Goma Arábica/química , Mananas/química , Gomas Vegetais/química , Polissacarídeos/química , Células CACO-2 , Emulsões , Óleos de Peixe/farmacologia , Galactanos/farmacologia , Goma Arábica/farmacologia , Humanos , Mananas/farmacologia , Oxirredução , Gomas Vegetais/farmacologia , Polissacarídeos/farmacologia
12.
Food Funct ; 12(16): 7480-7489, 2021 Aug 21.
Artigo em Inglês | MEDLINE | ID: mdl-34212169

RESUMO

Guar gum-derived galactomannan (GGGM) has been widely used in the food industry for a long time and its adverse impacts have been scarcely reported. Galactomannan is considered to have a structure similar to the surface components of certain pathogens, and the present study was thus conducted to investigate if oral administration of GGGM could cause physiological effects that were hypothesized to be related to intestinal inflammatory responses. The results showed that oral administration of GGGM resulted in compromises on growth performance, an increase of the relative weight of spleen and epididymal fat, and an elevation of the α1-acid glycoprotein content in both serum and livers of mice. With regard to energy metabolism-related indices, the activities of intestinal lactic dehydrogenase and succinic dehydrogenase were all increased by the GGGM treatment in both in vivo and in vitro experiments, the latter of which also showed an elevation in the consumption of reducing sugar by intestinal epithelial cells along with a reduced viability of these cells in response to the GGGM treatment. Notably, the GGGM treatment triggered intestinal inflammatory responses that were evidenced by the increased expression of intestinal inflammatory cytokines such as TNF-α and IL-6 both in vivo and in vitro, which were at least partially responsible for the increased energy expenditure in the intestine and the retardation of growth. The results of this study could expand our knowledge of GGGM administration and provide integrated insights into the consumption of GGGM-containing foods.


Assuntos
Metabolismo Energético/efeitos dos fármacos , Galactanos/farmacologia , Galactose/análogos & derivados , Inflamação/induzido quimicamente , Intestinos/efeitos dos fármacos , Intestinos/metabolismo , Mananas/farmacologia , Gomas Vegetais/farmacologia , Animais , Modelos Animais de Doenças , Galactanos/química , Galactose/química , Galactose/farmacologia , Masculino , Mananas/química , Camundongos , Gomas Vegetais/química
13.
Mol Reprod Dev ; 88(7): 516-524, 2021 07.
Artigo em Inglês | MEDLINE | ID: mdl-34096128

RESUMO

Xanthan gum (XG) and locust bean gum (LBG) are nontoxic polysaccharides that produce culture substrates. The present study examined the effect of XG-LBG gel on in vitro bovine oocyte growth and gene expression in granulosa cells. Oocytes and granulosa cell complexes (OGCs) were cultured in vitro on plastic culture plate (Plate) or XG-LBG gel for 16 days. OGCs formed a dome-like cavity surrounding the oocytes on plate but formed a spherical follicle structure on XG-LBG gel. The total granulosa cell numbers of the OGCs and their survival rate was greater for OGCs cultured on XG-LBG gel than for those cultured on plate. Oocytes grown on XG-LBG gels had higher lipid and mitochondrial content, as well as a larger diameter, than their plate counterparts. When oocytes grown in vitro were subjected to in vitro maturation and fertilization, the normal fertilization rate was significantly higher for oocytes developed on XG-LBG gel than that of oocytes cultured on the plate counterpart. RNAseq of the granulosa cells revealed that genes associated with focal adhesion, phosphatidylinositol 3'-kinase-Akt and Hippo signaling, and regulation of actin cytoskeleton were upregulated in granulosa cells of OGCs cultured on XG-LBG gel compared with those cultured on plate.


Assuntos
Galactanos/farmacologia , Células da Granulosa/efeitos dos fármacos , Técnicas de Maturação in Vitro de Oócitos/métodos , Mananas/farmacologia , Oogênese/efeitos dos fármacos , Gomas Vegetais/farmacologia , Polissacarídeos Bacterianos/farmacologia , Animais , Bovinos , Células Cultivadas , Feminino , Galactanos/química , Géis/química , Géis/farmacologia , Expressão Gênica/efeitos dos fármacos , Células da Granulosa/metabolismo , Técnicas de Maturação in Vitro de Oócitos/veterinária , Mananas/química , Oócitos/efeitos dos fármacos , Oócitos/fisiologia , Oogênese/genética , Gomas Vegetais/química , Polissacarídeos/química , Polissacarídeos/farmacologia , Polissacarídeos Bacterianos/química , Técnicas de Cultura de Tecidos/métodos , Técnicas de Cultura de Tecidos/veterinária , Tecidos Suporte/química
14.
Mol Nutr Food Res ; 65(16): e2100146, 2021 08.
Artigo em Inglês | MEDLINE | ID: mdl-34125489

RESUMO

SCOPE: Depression is the leading cause of disability around the world; however, most antidepressants have drug tolerance and serious side effects. In this study, it is explored whether partially hydrolyzed guar gum (PHGG) is a safe food that exhibits protection in a mouse model of depression. METHODS AND RESULTS: PHGG is orally administered to mice with depression induced by chronic unpredictable mild stress (CUMS) in two animal experiments (prevention trial and intervention trial) to characterize the potentially protective effect of PHGG. The results in the prevention trial show that PHGG significantly inhibits the loss of body weight, and prevents CUMS-induced depressive-like behavior in mice. The beneficial effects may be associated with PHGG modulating the gut microbiota structure and then increasing the levels of short-chain fatty acids in mice feces and the levels of 5-hydroxytryptamine and dopamine in serum, striatum, and hippocampus. Besides, PHGG in the intervention trial is less effective than that in the prevention trial, but it may have a synergistic effect on improving depression with fluoxetine. CONCLUSIONS: This study suggests that moderate daily intake of PHGG can contribute to relieving depressive-like behavior.


Assuntos
Depressão/prevenção & controle , Galactanos/farmacologia , Microbioma Gastrointestinal/efeitos dos fármacos , Mananas/farmacologia , Neurotransmissores/metabolismo , Gomas Vegetais/farmacologia , Administração Oral , Animais , Depressão/terapia , Dopamina , Ácidos Graxos Voláteis , Hidrólise , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Serotonina , Estresse Psicológico , Redução de Peso
15.
Carbohydr Polym ; 266: 118126, 2021 Aug 15.
Artigo em Inglês | MEDLINE | ID: mdl-34044942

RESUMO

Tree gums are a class of abundantly available carbohydrate polymers that have not been explored thoroughly in film fabrication for food packaging. Films obtained from pristine tree gums are often brittle, hygroscopic, and lack mechanical strength. This study focuses on the chemical modification of gum kondagogu using long-chain alkenyl groups of dodecenyl succinic anhydride (DDSA), an esterifying agent that introduces a 12-carbon hydrophobic chain to the kondagogu structure. The esterification reaction was confirmed by 1H nuclear magnetic resonance and Fourier-transform infrared spectroscopy. The effect of nano-cellulose as an additive on various film properties was investigated. The developed films were characterized for their mechanical, morphological, optical, barrier, antibacterial, and biodegradable properties. The inclusion of long-chain carbon groups acted as internal plasticizers and resulted in an amorphous structure with better film-forming ability, improved hydrophobicity, and higher elongation at break values. The modified films exhibited antibacterial properties and excellent biodegradability under aerobic conditions.


Assuntos
Alcenos/farmacologia , Bixaceae/química , Embalagem de Alimentos , Gomas Vegetais/farmacologia , Anidridos Succínicos/química , Alcenos/síntese química , Alcenos/química , Antibacterianos/síntese química , Antibacterianos/química , Antibacterianos/farmacologia , Plásticos Biodegradáveis/síntese química , Plásticos Biodegradáveis/química , Plásticos Biodegradáveis/farmacologia , Módulo de Elasticidade , Escherichia coli/efeitos dos fármacos , Interações Hidrofóbicas e Hidrofílicas , Teste de Materiais , Gomas Vegetais/síntese química , Gomas Vegetais/química , Staphylococcus aureus/efeitos dos fármacos , Resistência à Tração
16.
Int J Biol Macromol ; 181: 945-955, 2021 Jun 30.
Artigo em Inglês | MEDLINE | ID: mdl-33878357

RESUMO

In this paper, the impact of different substitution levels of cress seed gum (CSG, 0, 5, 10, and 15%) and sucrose (SUC, 0, 5, and 10%) on the rheological properties, textural attributes, syneresis, FTIR and microstructure of native wheat starch (NWS, 4%) gel was investigated. According to the rheological tests, the NWS-CSG and NWS-CSG-SUC gels showed thixotropic behavior and all the samples exhibited shear-thinning flow behavior. Increasing the CSG substitution level up to 15% elevated the apparent viscosity, consistency coefficient whereas the SUC substitution with NWS reduced these values. The higher apparent viscosity, consistency coefficient, and stronger pseudoplastic behavior were obtained for NWS-CSG-SUC gel than NWS gel. The addition of CSG greatly decreased hardness and consistency from 140 to 55.5 g and from 6.9 to 3.0 mJ, respectively during storage at 4 °C for 14 days; while in the presence of SUC these values slightly decreased. After storage, syneresis of NWS and NWS-10%SUC gels increased by 46.78% and 32.11%, respectively; whereas it decreased 19.88% for NWS-15%CSG gel. The SEM images showed that the mixed gels had a denser structure with a smaller pore size. The results indicated that CSG had positive effect in modifying the properties of NWS-SUC mixed gels.


Assuntos
Brassicaceae/química , Reologia/efeitos dos fármacos , Amido/antagonistas & inibidores , Sacarose/antagonistas & inibidores , Gomas Vegetais/química , Gomas Vegetais/farmacologia , Sementes/química , Amido/química , Sacarose/química , Triticum/química
17.
Int J Biol Macromol ; 170: 129-139, 2021 Feb 15.
Artigo em Inglês | MEDLINE | ID: mdl-33338530

RESUMO

In this study, the microbiological, physicochemical, and flavor changes of turbot (Scophthalmus maximus) coated with a composite active coating of locust bean gum (LBG) and sodium alginate (SA) supplemented with daphnetin emulsions (0.16, 0.32, 0.64 mg·mL-1) were determined during 18 days of refrigerated storage (4 ± 1 °C). Results showed that LBG-SA coatings containing 0.32 mg·mL-1 daphnetin emulsions could significantly lower the total viable count (TVC), psychrophiles, Pseudomonas spp. and H2S-producing bacteria counts, and inhibit the productions of off-flavor compounds including the total volatile basic nitrogen (TVB-N), trimethylamine (TMA) and ATP-related compounds. 32 volatile compounds were identified by solid phase microextraction combined with gas chromatography-mass spectrometer method (SPME-GC/MS) during refrigerated storage and the treated turbot samples significantly lowered the relative content of fishy flavor compounds. Further, the LBG-SA coatings containing daphnetin could also delay the myofibril degradation of the turbot samples. These results indicated that the LBG-SA coatings with 0.32 mg·mL-1 daphnetin were a potential alternative way to improve the quality of turbot during refrigerated storage.


Assuntos
Alginatos/farmacologia , Antibacterianos/farmacologia , Antioxidantes/farmacologia , Criopreservação , Linguados , Conservação de Alimentos , Conservantes de Alimentos/farmacologia , Galactanos/farmacologia , Mananas/farmacologia , Carne , Gomas Vegetais/farmacologia , Umbeliferonas/farmacologia , Alginatos/administração & dosagem , Animais , Antibacterianos/administração & dosagem , Antioxidantes/administração & dosagem , Carga Bacteriana , Emulsões , Linguados/microbiologia , Aromatizantes/administração & dosagem , Aromatizantes/farmacologia , Microbiologia de Alimentos , Conservantes de Alimentos/administração & dosagem , Galactanos/administração & dosagem , Cromatografia Gasosa-Espectrometria de Massas , Lecitinas/administração & dosagem , Lecitinas/farmacologia , Mananas/administração & dosagem , Carne/microbiologia , Metilaminas/análise , Miofibrilas/efeitos dos fármacos , Nitrogênio/análise , Gomas Vegetais/administração & dosagem , Pseudomonas/efeitos dos fármacos , Umbeliferonas/administração & dosagem , Compostos Orgânicos Voláteis/análise
18.
Carbohydr Polym ; 252: 117221, 2021 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-33183647

RESUMO

Seaweed is a prominent source of polysaccharides with extraction processes properly established, allowing to employ them in several areas. Among all the types of biopolymers obtained from seaweed, furcellaran has gained notoriety in recent years. This is due to its abundance, water solubility and outstanding film-forming abilities. Despite still being little studied, in several works, remarkable advances in terms of improving properties of furcellaran-based films have been described in the literature. However, there are still numerous research opportunities to be explored regarding the improvement of material properties. Therefore, the objective of this review is to highlight the innovative method in preparation, characterization and performance of furcellaran-based films as food packaging. This is the first study in which current results in the area are presented. Initially, it concerns biopolymer chemical and extraction insights. In addition, a comprehensive description of the advances in film properties is outlined (from mechanical to active/intelligent responses). Ultimately, challenges and future prospects are also discussed.


Assuntos
Alginatos , Anti-Infecciosos , Antioxidantes , Filmes Comestíveis , Embalagem de Alimentos , Gomas Vegetais , Alginatos/química , Alginatos/isolamento & purificação , Alginatos/farmacologia , Anti-Infecciosos/química , Anti-Infecciosos/isolamento & purificação , Anti-Infecciosos/farmacologia , Antioxidantes/química , Antioxidantes/isolamento & purificação , Antioxidantes/farmacologia , Bactérias/efeitos dos fármacos , Fenômenos Mecânicos , Gomas Vegetais/química , Gomas Vegetais/isolamento & purificação , Gomas Vegetais/farmacologia
19.
Int J Nanomedicine ; 15: 7097-7115, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33061370

RESUMO

BACKGROUND: Plant gums consist of polysaccharides which can be used in the preparation of nanocarriers and provide a wide application in pharmaceutical applications including as drug delivery agents and the matrices for drug release. The objectives of the study were to collect plant gums from Araucaria heterophylla L and Prosopis chilensis L and to extract and characterize their polysaccharides. Then to utilize these plant gum-derived polysaccharides for the formulation of nanocarriers to use for drug loading and to examine their purpose in drug delivery in vitro. METHODS: Plant gum was collected, polysaccharide was extracted, purified, characterized using UV-Vis, FTIR, TGA and GCMS and subjected to various bioactive studies. The purified polysaccharide was used for making curcumin-loaded nanocarriers using STMP (sodium trimetaphosphate). Bioactivities were performed on the crude, purified and drug-loaded nanocarriers. These polysaccharide-based nanocarriers were characterized using UV-Vis spectrophotometer, FTIR, SEM, and AFM. Drug release kinetics were performed for the drug-loaded nanocarriers. RESULTS: The presence of glucose, xylose and sucrose was studied from the UV-Vis and GCMS analysis. Purified polysaccharides of both the plants showed antioxidant activity and also antibacterial activity against Bacillus sp. Purified polysaccharides were used for nanocarrier synthesis, where the size and shape of the nanocarriers were studied using SEM analysis and AFM analysis. The size of the drug-loaded nanocarriers was found to be around 200 nm. The curcumin-loaded nanocarriers were releasing curcumin slow and steady. CONCLUSION: The extracted pure polysaccharide of A. heterophylla and P. chilensis acted as good antioxidants and showed antibacterial activity against Bacillus sp. These polysaccharides were fabricated into curcumin-loaded nanocarriers whose size was below 200 nm. Both the drug-loaded nanocarriers synthesized using A. heterophylla and P. chilensis showed antibacterial activity with a steady drug release profile. Hence, these natural exudates can serve as biodegradable nanocarriers in drug delivery.


Assuntos
Araucaria/química , Portadores de Fármacos/química , Nanoestruturas/química , Gomas Vegetais/isolamento & purificação , Prosopis/química , Antibacterianos/química , Antibacterianos/farmacologia , Antioxidantes/química , Antioxidantes/farmacologia , Bacillus/efeitos dos fármacos , Curcumina/administração & dosagem , Portadores de Fármacos/síntese química , Sistemas de Liberação de Medicamentos , Liberação Controlada de Fármacos , Cromatografia Gasosa-Espectrometria de Massas , Nanoestruturas/administração & dosagem , Gomas Vegetais/química , Gomas Vegetais/farmacologia , Espectroscopia de Infravermelho com Transformada de Fourier , Termogravimetria
20.
Int J Biol Macromol ; 165(Pt A): 333-345, 2020 Dec 15.
Artigo em Inglês | MEDLINE | ID: mdl-32980413

RESUMO

The current study aims to check various behavioural, developmental, cytotoxic, and genotoxic effects of Fe3O4-GG nanocomposite (GGNCs) on Drosophila melanogaster. Fe3O4 nanoparticles were prepared by the chemical co-precipitation method and cross-linked with guargum nanoparticles to prepare the nanocomposites. The nanocomposites were characterized by using transmission electron microscopy (TEM), X-ray diffraction (XRD), and FTIR techniques. To investigate the biomolecular interaction, GGNCs was further tagged with Fluorescein isothiocyanate. Various concentrations of nanocomposites were mixed with the food and flies were allowed to complete the life cycle. The life cycle of the flies was studied as a function of various concentrations of GGNCs. The 1st instar larvae after hatching from the egg start eating the food mixed with GGNCs. The 3rd instar larvae were investigated for various behavioural and morphological abnormalities within the gut. The 3rd instar larva has defective crawling speed, crawling path, and more number of micronuclei within the gut. Similarly, in adult flies thermal sensitivity, climbing behaviour was found to be altered. In adult flies, a significant reduction in body weight was found which is further correlated with variation of protein, carbohydrate, triglyceride, and antioxidant enzymes. Altogether, the current study suggests GGNCs as a non-genotoxic nanoparticle for various biological applications.


Assuntos
Materiais Revestidos Biocompatíveis , Dano ao DNA , Óxido Ferroso-Férrico , Galactanos , Mananas , Gomas Vegetais , Animais , Materiais Revestidos Biocompatíveis/química , Materiais Revestidos Biocompatíveis/farmacologia , Drosophila melanogaster , Óxido Ferroso-Férrico/química , Óxido Ferroso-Férrico/farmacologia , Galactanos/química , Galactanos/farmacologia , Larva/crescimento & desenvolvimento , Mananas/química , Mananas/farmacologia , Gomas Vegetais/química , Gomas Vegetais/farmacologia
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