Food Hydrocolloids for Health最新文献

Inflammation is a phenomenon responsible for the perturbation of homeostasis in several levels, with many sources, such as infection, injury, and exposure to contaminants. The necessity of new products that are effective in treating inflammation processes as can selectively imaging an inflammation site is a global issue. In this study, we have evaluated the applicability of Fucoidan as a therapeutic and imaging agent. We have assessed the Fucoidan in two inflammation models for therapeutic purposes: arthritis and lungs (LPS). In the case of use as an imaging agent, we evaluated the radiolabeled Fucoidan with 99mTc in inflamed lungs (LPS). The results demonstrated that Fucoidan has a therapeutic anti-inflammatory effect, especially in the lung model (LPS). Additionally, the imaging application demonstrated that radiolabeled Fucoidan (99mTc-Fucoidan) has an important chemoattraction for inflammation sites with very high bioaccumulation, which permits to think in an imaging application.

Concerns abouth diet-health relationships have led many people to include healthier snacks in their diets, including those with functional (including probiotic) properties. This study was focused on development of probiotic-loaded banana leathers. Two probiotic bacteria (the spore-forming Bacillus coagulans and the conventional non-spore-forming Lactobacillus acidophilus) and two polymeric matrices (digestible cassava starch and non-digestible bacterial cellulose - BC) have been used. The presence of probiotic bacteria (mainly L. acidophilus) reduced the tensile strength, elastic modulus and shear force of the leathers, while the BC-based leathers were stronger, stiffer and more resistant to shear stress than the starch-based ones. While a high probiotic viability was kept on fruit leathers loaded with B. coagulans during drying and room-temperature storage, those loaded with L. acidophilus suffered high viability losses upon drying, which was ascribed to osmotic stress. The nature of the biopolymeric matrix has not significantly influence the bacterial viability losses along processing and storage, or the final viable cell count released into the intestine (as assessed using an INFOGEST static in vitro simulated digestion model). The banana leathers loaded with B. coagulans were well accepted, irrespectively of being produced from BC or starch, although some negative comments on the texture and flavor of the BC-based ones have been more frequent than with the starch-based ones.

This research studied the formation of complex coacervates formed by carboxymethylcellulose (CMC) and lactoferrin (Lf) as wall materials for encapsulation of β-carotene present in sacha inchi oil (SIO). According to zeta-potential and turbidimetric analyses, the optimum conditions for the formation of CMC:Lf complex coacervates were pH 5.0 and a 1:14 ratio. Isothermal titration calorimetry showed that the complexes were formed in two stages: first, the interaction was driven by electrostatic attraction, and second, electrostatic and other interactions (such as hydrogen bonding) or structural conformations were present. The capsules formed with CMC:Lf complex coacervates had a spherical appearance with a well-defined core and were able to encapsulate 97% of SIO. The presence of SIO, CMC, and Lf in the capsules was confirmed by Fourier transform infrared analysis. The in vitro gastrointestinal digestion of capsules showed that 84.31% of β-carotene present in SIO was released in the intestine, with high bioaccessibility (67%). Additionally, Fickian diffusion was the mechanism observed for β-carotene release in the food model. Thus, it is possible to conclude that CMC:Lf complex coacervates are good wall material for encapsulating and protecting β-carotene for food fortification.

Increased concerns over intake of harmful transfats and saturated fats in the diet pose a new challenge to the scientific community, to come up with viable alternatives replacing detrimental fats without affecting organoleptic properties of the food product. Out of various strategies aimed to reduce/replace transfats and saturated fats in foods, oleogels are reported to be an innovative structured fat system used for industrial applications due to their nutritional and environmental benefits. This review will focus on the formulation methods and chemistry of oleogels, along with their recent food applications particularly in bioactive delivery and in other sectors complying with their need. An insight into the mechanism of gelation and various components of oleogels will be deliberated upon. Moreover, modified oleogels with improved technical and functional properties manufactured by use of several emerging technologies like ultrasound will also be reviewed.

Over the past century, there has been a large increase in the life expectancy of people around the globe, which means there has been a rise in diseases of the elderly. Age-related macular degeneration (AMD) is a sight-threatening condition of the eye characterized by a loss of central vision. Research suggests that macular pigment carotenoids, such as lutein and zeaxanthin, may inhibit the onset of this disease by protecting the eye from damaging light and oxidation. These carotenoids are chemically reactive hydrophobic molecules with a low water-solubility, chemical stability, and bioavailability. Consequently, many carotenoid-rich foods and supplements are not absorbed by the human body and do not exhibit their beneficial effects on eye health. In this article, we review the prevalence and characteristics of AMD, the sources of macular pigment carotenoids in foods, the factors limiting their bioavailability, and analytical approaches available to study their bioavailability and bioactivity. We then discuss different strategies for increasing the concentration of bioavailable macular pigment carotenoids in the human diet, including dietary sources, supplements, functional foods, and excipient foods, with an emphasis on colloidal systems that can be used for this purpose.

This research studied the formation of sodium polygalacturonate complexes with the antimicrobial drug "Tetracycline". The formation was confirmed by IR, UV and NMR spectroscopy. It was shown that the complexes were formed by electrostatic attraction and hydrogen bonding. The complexes demonstrated a high degree of drug binding to the polysaccharide matrix with the maximum content of tetracycline (6.68 wt %). The study of the antimicrobial activity of obtained compounds against S. aureus, B. cereus, E. coli showed no decrease in the antimicrobial effect compared to source tetracycline. Thus, the future research towards the new design compounds based on studied complexes could make contribution to a new generation of drugs based on pectin biopolymers.

Black cumin seed oil (BCO) is an important oil source in the food industry. Alginate capsules with aqueous cores can be made by reversing the gelation technique with alginate and CaCl₂. The research aims to investigate the physicochemical properties of the capsules as well as to analyze the storage stability of BCO emulsions (emulgators; polyglycerol polyricinoleate (A) and sorbitan monooleate (B)) coated using the inverse gelation method. The peroxide value in group A increased rapidly on the first day and then declined without any significant difference between the third and sixth days (p > 0.05). The peroxide value of group B increased significantly (p < 0.05) on the first day and then declined like in the other groups. BCO (7.42 ± 0.16) had the lowest p-anisidine value at the beginning with the initial p-anisidine value of encapsulated BCO groups A and B (21.74 ± 0.84 and 11.48 ± 1.31, respectively) having significantly higher (p < 0.05). The reverse gelation technique utilized in this study raised the p-anisidine value while lowering the peroxide value of the seed oil. The shelf life of black seed oil can be increased by using this technique in the industry.

The present investigations were aimed at formulating topical gel containing nanostructured lipid carriers (NLCs) of griseofulvin and assess its effectiveness on superficial infections. The drug solubility studies were executed using various lipids and surfactants like Glyceryl monostearate, Oleic acid, Pluronic F 68, and Tween 80, and the concentrations of lipids, surfactants, and emulsifier were optimized using Box-Behnken design (BBD). Microemulsions were made utilizing sonication. The prepared batches (F1 to F15) were analyzed and observed that the optimized batch (F12), containing 0.2% w/w drug, 2% GMS, 2% Pluronic F68 and Tween 80 (in the ratio of 1:1) showed a particle size of 209 nm, zeta potential of -44.12 mV, entrapment level of 85.24% along with a drug release of 92.12%. Carbopol 940, 1.5% was used to make the topical gel. The results of biochemical studies reflected that griseofulvin-loaded-nanogel produced a more significant decrease in lipid peroxidation as compared to the standard drug. The in-vitro cytotoxicity studies showed better safety of nanogel in human keratinocyte cells (HaCaT). The results of antifungal activity showed complete clinical and mycological cure in a duration of 21 days against superficial infections like Tenia pedis and also ringworm in Wistar rats while using T.rubrum and M.canis fungal strains. These preclinical investigations have proved that the nanogels have a better potential in treating the aforementioned superficial infections providing an effective alternative for currently existing products.

It is critical to develop a hydrophilic drug carrier with positive charge on the surface to enhance the bioavailability of curcumin to overcome the tissue barrier, e.g., blood brain barrier. In this paper, a quaternized chitosan derivative, N,N,N-Trimethyl Chitosan (TMC) was produced which is a cationic polysaccharide. Nuclear magnetic resonance (¹H-NMR) and Infrared Spectroscopy (FTIR) have been used to verify the synthesis of TMC. A simple nanoemulsion process has been developed to produce TMC-based nanosphere to load curcumin. A high encapsulation efficiency (over 90%) can be observed. The average particle size of nanospheres made of TMC with 2.5 mg/mL and 4.0 mg/ mL is estimated at 555.3±117.7 nm and 771.2±123.2 nm, respectively. The effect of the concentrations of TMC on the release profile has been investigated. It is found that nanospheres made of a higher concentration of TMC, 4.0 mg/mL, could lead to an extended release of curcumin, and the first-order release kinetics can be observed when release time increases from 0 to 265 h. The release kinetics of curcumin loaded in TMC nanospheres is also influenced by pH value. In addition, the cytotoxicity study shows that no toxic effect can be found when cells are treated with synthetic TMC. The relative cell viability of mouse cardiac endothelial cells treated with curcumin loaded TMC nanospheres is higher than that when cells treated with curcumin alone.

Eye is one of the susceptible organs of the human body which is associated with several internal organs including the brain. Due to the protective mechanisms of body and ocular barrier properties, the area of ocular drug delivery presents a challenge to pharmaceutical researchers. Alginate is a naturally occurring polysaccharide obtained from marine brown seaweeds and bacterial sources. According to the Food and Drug Administration, (FDA) alginate is generally recognized as safe (GRAS). It is widely used as a gelling agent and thickener in the food industries. In the field of drug delivery, alginate is extensively investigated as an excipient. In ocular targeting of therapeutics, sodium alginate offers many advantages including ion sensitive in situ gelation, non-toxic and biodegradable behaviour in combination with mucoadhesive nature of the polymer. The instant gelation ability of alginate allows it to increase the ocular residence time and enhances the ocular drug bioavailability reducing the requirement of frequent administration of drug. The abundant availability and attractive physicochemical properties of alginate has encouraged pharmaceutical scientists to explore newer strategies in ocular drug targeting. In this review, the efficacy of alginate in delivering various therapeutic agents has been discussed.