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1.
Carbohydr Polym ; 339: 122202, 2024 Sep 01.
Article in English | MEDLINE | ID: mdl-38823898

ABSTRACT

Interactions among multi-component play a critical role in modulating the foaming properties of aerated foods. This study evaluated the mechanisms of synergistic improvement of gellan gum (GEG) and guar gum (GUG) on the foaming properties of soy protein isolate (SPI)-based complex. The results showed that the GEG/GUG ratio was closely related to the intermolecular interactions of SPI-based ternary complex and the dynamical changing of its foaming properties. The SPI/GEG/GUG ternary complex with a GEG/GUG ratio of 2/3 exhibited the highest foamability (195 %) and comparable foam stability (99.17 %), which were 32.95 % and 2.99 % higher than that of SPI/GEG binary complex. At this ratio, GUG promoted the interactions between SPI and GEG, and bound to complex's surface through hydrogen bonding, resulting in the increase of particle size and surface charge, and the decrease of surface hydrophobicity. Although this reduced the diffusion of complex onto the air/water interface, it increased permeation rate and molecular rearrangement behavior, which were the potential mechanisms to improve the foaming properties. Additionally, the synergistic effect of GEG and GUG also enhanced the elastic strength and solid characteristics of foam systems. This study provided a theoretical guidance for the targeted modulation of foaming properties of multi-component aerated foods.


Subject(s)
Galactans , Mannans , Plant Gums , Polysaccharides, Bacterial , Soybean Proteins , Plant Gums/chemistry , Galactans/chemistry , Soybean Proteins/chemistry , Mannans/chemistry , Polysaccharides, Bacterial/chemistry , Hydrophobic and Hydrophilic Interactions , Particle Size , Hydrogen Bonding
2.
Carbohydr Polym ; 339: 122268, 2024 Sep 01.
Article in English | MEDLINE | ID: mdl-38823931

ABSTRACT

The influence of locust bean gum (LBG) galactomannans (GMs) molecular weight (Mw) to assemble microparticulate systems was evaluated, and carriers for deep lung delivery were developed. A commercial batch of LBG with a mannose/galactose (M/G) ratio of 2.4 (batch 1) was used to study the influence of different microwave partial acid hydrolysis conditions on carbohydrate composition, glycosidic linkages, and aqueous solutions viscosity. The microwave treatment did not affect the composition, presenting 4-Man (36-42 %), 4,6-Man (27-35 %), and T-Gal (24-25 %) as the main glycosidic linkages. Depolymerization led to a viscosity reduction (≤0.005 Pa·s) with no major impact on polysaccharide debranching. The structural composition of the LBG galactomannans were further elucidated with sequence-specific proteins using carbohydrate microarray technologies. A second batch of LBG (M/G 3.3) was used to study the impact of GMs with different Mw on microparticle assembling, characteristics, and insulin release kinetics. The low-Mw GMs microparticles led to a faster release (20 min) than the higher-Mw (40 min) ones, impacting the release kinetics. All microparticles exhibited a safety profile to cells of the respiratory tract. However, only the higher-Mw GMs allowed the assembly of microparticles with sizes suitable for this type of administration.


Subject(s)
Galactose , Mannans , Molecular Weight , Plant Gums , Mannans/chemistry , Galactose/chemistry , Galactose/analogs & derivatives , Plant Gums/chemistry , Humans , Lung/metabolism , Drug Carriers/chemistry , Particle Size , Viscosity , Insulin/chemistry , Insulin/administration & dosage , Drug Liberation , Galactans/chemistry , Mannose/chemistry , Animals
3.
Carbohydr Polym ; 339: 122266, 2024 Sep 01.
Article in English | MEDLINE | ID: mdl-38823930

ABSTRACT

Konjac glucomannan (KG) is a dietary fiber hydrocolloid derived from Amorphophallus konjac tubers and is widely utilized as a food additive and dietary supplement. As a health-conscious choice, purified KG, along with konjac flour and KG-infused diets, have gained widespread acceptance in Asian and European markets. An overview of the chemical composition and structure of KG is given in this review, along with thorough explanations of the processes used in its extraction, production, and purification. KG has been shown to promote health by reducing glucose, cholesterol, triglyceride levels, and blood pressure, thereby offering significant weight loss advantages. Furthermore, this review delves into the extensive health benefits and pharmaceutical applications of KG and its derivatives, emphasizing its prebiotic, anti-inflammatory, and antitumor activities. This study highlights how these natural polysaccharides can positively influence health, underscoring their potential in various biomedical applications.


Subject(s)
Amorphophallus , Mannans , Mannans/chemistry , Mannans/isolation & purification , Humans , Amorphophallus/chemistry , Animals , Dietary Fiber/analysis , Anti-Inflammatory Agents/chemistry , Anti-Inflammatory Agents/pharmacology , Anti-Inflammatory Agents/isolation & purification , Dietary Supplements , Prebiotics , Antineoplastic Agents/chemistry , Antineoplastic Agents/isolation & purification , Antineoplastic Agents/pharmacology
4.
Int J Biol Macromol ; 270(Pt 1): 132379, 2024 Jun.
Article in English | MEDLINE | ID: mdl-38754680

ABSTRACT

Hydrogels based on natural polysaccharides have demonstrated efficacy in epithelial recovery from cutaneous burn wounds. Here, we prepared a double-network hydrogel consisting of galactomannan (from Cassia grandis seeds) and κ-carrageenan (commercially sourced), cross-linked with CaCl2, as a matrix for immobilizing lactoferrin and/or Cramoll, aiming at its applicability as dressings for second-degree burn wounds. The formulations obtained [H - hydrogel, HL - hydrogel + lactoferrin, HC - hydrogel + Cramoll and HLC - hydrogel + lactoferrin + Cramoll] were analyzed rheologically as well as in terms of their stability (pH, color, microbial contamination) for 90 days. The burn was created with an aluminum bar (97 ± 3 °C) in the dorsal region of Wistar rats and subsequently treated with hydrogels (H, HL, HC, HLC) and control saline solution (S). The burn was monitored for 3, 7 and 14 days to evaluate the efficacy of the hydrogels in promoting wound healing. The hydrogels did not reveal significant pH or microbiological changes; there was an increase in brightness and a reduction in opacity for H. The rheological analysis confirmed the gel-like viscoelastic signature of the systems without substantial modification of the basic rheological characteristics, however HLC proved to be more rigid, due to rheological synergy when combining protein biomolecules. Macroscopic analyses confirmed centripetal healing with wound contraction: S < H < HC < HL < HLC. Histopathological analyses showed that hydrogel-treated groups reduced inflammation, tissue necrosis and fibrosis, while promoting re-epithelialization with focal acanthosis, especially in HLC due to a positive synergistic effect, indicating its potential as a promising therapy in the repair of burns.


Subject(s)
Burns , Carrageenan , Galactose , Hydrogels , Mannans , Rats, Wistar , Wound Healing , Hydrogels/chemistry , Mannans/chemistry , Mannans/pharmacology , Animals , Burns/therapy , Burns/drug therapy , Carrageenan/chemistry , Wound Healing/drug effects , Rats , Galactose/analogs & derivatives , Galactose/chemistry , Male , Lactoferrin/chemistry , Rheology
5.
Int J Biol Macromol ; 270(Pt 1): 132035, 2024 Jun.
Article in English | MEDLINE | ID: mdl-38705316

ABSTRACT

The frequently encountered wastewater contaminations, including soluble aromatic compound and dye pollutants, pathogenic bacteria, and insoluble oils, have resulted in significant environmental and human health issues. It poses a challenge to utilize identical materials for the treatment of complex wastewater. Herein, in this research, multifunctional Ag NPs/guar gum hybrid hydrogels were fabricated using a facile in situ reduction and self-crosslinking method for efficient remediation of complex wastewater. The Ag NPs/guar gum hybrid hydrogel showed remarkable remodeling, adhesive, and self-healing characteristics, which was favorable for its versatile applications. The combination of Ag NPs with the guar gum skeleton endowed the hybrid hydrogel with exceptional catalytic activity for reducing aromatic compounds and dye pollutants, as well as remarkable antibacterial efficacy against pathogenic bacteria. In addition, the Ag NPs/guar gum hybrid hydrogel could be employed to coat a variety of substrates, including cotton fabrics and stainless steel meshes. The hydrogel coated cotton fabrics and meshes presented superhydrophilicity/underwater superoleophobicity, excellent antifouling capacity, and outstanding recyclability, which could be successfully applied for efficient separation of oil-water mixtures. The findings of this work provide a feasible and cost-effective approach for the remediation of intricate wastewater.


Subject(s)
Anti-Bacterial Agents , Galactans , Hydrogels , Mannans , Metal Nanoparticles , Plant Gums , Silver , Galactans/chemistry , Plant Gums/chemistry , Silver/chemistry , Mannans/chemistry , Anti-Bacterial Agents/chemistry , Anti-Bacterial Agents/pharmacology , Catalysis , Metal Nanoparticles/chemistry , Hydrogels/chemistry , Wastewater/chemistry , Water Purification/methods , Water/chemistry , Water Pollutants, Chemical/chemistry , Water Pollutants, Chemical/isolation & purification , Oils/chemistry
6.
Int J Biol Macromol ; 270(Pt 1): 132287, 2024 Jun.
Article in English | MEDLINE | ID: mdl-38735601

ABSTRACT

Damage to the integrity of the preservation coating on the fruit surface will seriously affect the shelf life of the fruit. In this work, the strong hydrogen bond interaction between xanthan gum (XG) and konjac glucomannan (KGM) could form hydrogel films with self-healing properties. The introduction of gallic acid (GA) was beneficial to further improve the antioxidant activity and UV shielding performance of the composite films. Surprisingly, the mechanical properties and gas (water vapor, O2 and CO2) barrier properties of the KGM film crosslinked by XG were significantly improved. The experiment of banana preservation showed that the composite coating could effectively delay the water loss and browning of bananas, slow down the decomposition of pectin and starch in the flesh, and extend the shelf life of bananas for >6 days. Therefore, this multifunctional coating is an excellent packaging material and has a very broad application prospect in the field of food preservation.


Subject(s)
Food Preservation , Mannans , Musa , Polysaccharides, Bacterial , Mannans/chemistry , Polysaccharides, Bacterial/chemistry , Musa/chemistry , Food Preservation/methods , Antioxidants/chemistry , Food Packaging/methods , Hydrogels/chemistry
7.
Int J Biol Macromol ; 270(Pt 1): 132306, 2024 Jun.
Article in English | MEDLINE | ID: mdl-38740152

ABSTRACT

Combining natural polysaccharides with synthetic materials improves their functional properties which are essential for designing sustained-release drug delivery systems. In this context, the Aloe vera leaf mucilage/hydrogel (ALH) was reacted with acrylic acid (AA) to synthesize a copolymerized hydrogel, i.e., ALH-grafted-Polyacrylic acid (ALH-g-PAA) through free radical copolymerization. Concentrations of the crosslinker N,N'-methylene-bis-acrylamide (MBA), and the initiator potassium persulfate (KPS) were optimized to study their effects on ALH-g-PAA swelling. The FTIR and solid-state NMR (CP/MAS 13C NMR) spectra witnessed the formation of ALH-g-PAA. Scanning electron microscopy (SEM) analysis revealed superporous nature of ALH-g-PAA. The gel fraction (%) of ALH-g-PAA was directly related to the concentrations of AA and MBA whereas the sol fraction was inversely related to the concentrations of AA and MBA. The porosity (%) of ALH-g-PAA directly depends on the concentration of AA and MBA. The ALH-g-PAA swelled admirably at pH 7.4 and insignificantly at pH 1.2. The ALH-g-PAA offered on/off switching properties at pH 7.4/1.2. The metoprolol tartrate was loaded on different formulations of ALH-g-PAA. The ALH-g-PAA showed pH, time, and swelling-dependent release of metoprolol tartrate (MT) for 24 h following the first-order kinetic and Korsmeyer-Peppas model. Haemocompatibility studies ascertained the non-thrombogenic and non-hemolytic behavior of ALH-g-PAA.


Subject(s)
Aloe , Hydrogels , Mannans , Aloe/chemistry , Hydrogen-Ion Concentration , Mannans/chemistry , Hydrogels/chemistry , Drug Delivery Systems , Drug Liberation , Drug Carriers/chemistry , Polymers/chemistry , Porosity , Acrylic Resins/chemistry , Acrylates
8.
Food Chem ; 453: 139610, 2024 Sep 30.
Article in English | MEDLINE | ID: mdl-38761726

ABSTRACT

Ethanol is a common solvent to isolate glucomannan from porang (Amorphophallus muelleri Blume) flour (NPF). This study investigated the use of natural deep eutectic solvents (NADESs) in glucomannan isolation from NPF. NADESs formed by the hydrogen bond acceptors (choline chloride and betaine) and the hydrogen bond donors (glycerol, 1,2-propanediol, formic acid, and acetic acid) in varying molar ratios of 1:2, 1:3, and 1:4 were characterized to optimize glucomannan isolation. The results showed that higher molar ratios of NADES tended to yield porang glucomannan flour (PGF) with higher glucomannan content and viscosity. The gel of PGF exhibited pseudoplastic behavior. The FTIR spectra indicated that betaine-based NADES removed the acetyl groups from glucomannan chains. The PGF obtained from NADESs with a molar ratio of 1:4 was comparable to those obtained from ethanol with a glucomannan content of 87.34 %-93.28 % and a weight-average molecular weight of 9.12 × 105-1.20 × 106 g/mol.


Subject(s)
Amorphophallus , Deep Eutectic Solvents , Ethanol , Flour , Mannans , Mannans/chemistry , Mannans/isolation & purification , Ethanol/chemistry , Amorphophallus/chemistry , Flour/analysis , Deep Eutectic Solvents/chemistry , Viscosity , Molecular Weight , Plant Extracts/chemistry , Plant Extracts/isolation & purification
9.
J Mycol Med ; 34(2): 101481, 2024 Jun.
Article in English | MEDLINE | ID: mdl-38718721

ABSTRACT

Several lateral flow assays (LFA) capable of detecting Aspergillus fumigatus in serum and broncho-alveolar lavage fluid (BALF) within the hour, thereby potentially accelerating the screening process, are now commercially available. We prospectively compared three LFA targeting A. fumigatus on BALF collected from non-surgical intensive care patients between June 2022 and February 2023. The three LFA tested were Sõna Aspergillus galactomannan LFA (Immy), Fungadia Aspergillus antigen (Gadia), and AspLFD (OLM Diagnostics). We compared the results of these LFA with those of the galactomannan (GM) Platelia Aspergillus enzyme immunoassay (Bio-Rad), culture on Sabouraud medium and Aspergillus qPCR. We tested 97 BALF samples from 92 patients. In total 84 BALF samples tested negative with all three LFA, and four BALF samples tested positive with the AspLFD assay only (OLM). Only one BALF sample tested positive with the three LFA. In addition, three BALF samples tested positive only with the GM Platelia immunoassay. Four diagnosis of probable invasive aspergillosis were retained for the 92 patients tested. This prospective series included very few positive samples. From a practical point of view, the LFA from OLM presented the simplest protocol for use.


Subject(s)
Antigens, Fungal , Aspergillus fumigatus , Bronchoalveolar Lavage Fluid , Galactose , Invasive Pulmonary Aspergillosis , Mannans , Humans , Bronchoalveolar Lavage Fluid/microbiology , Bronchoalveolar Lavage Fluid/chemistry , Prospective Studies , Galactose/analogs & derivatives , Antigens, Fungal/analysis , Mannans/analysis , Male , Female , Aspergillus fumigatus/isolation & purification , Middle Aged , Invasive Pulmonary Aspergillosis/diagnosis , Invasive Pulmonary Aspergillosis/microbiology , Aged , Adult , Mass Screening/methods , Sensitivity and Specificity , Immunoassay/methods , Aged, 80 and over
10.
Food Chem ; 453: 139599, 2024 Sep 30.
Article in English | MEDLINE | ID: mdl-38788640

ABSTRACT

In this study, oxidized deacetylated konjac glucomannans with different degrees of oxidation were prepared by a combination of deacetylation and ozone oxidation. Carboxyl groups were found to be introduced into the modified konjac glucomannan while acetyl groups were removed. The backbone, branched chains, and crystal structure of modified konjac glucomannan were not significantly affected. The whiteness was enhanced to 97-99 % and the thermal degradation temperature was up to 250 °C after modification. The solubility of the modified konjac glucomannan (oxidized for 60 min) was significantly increased to 84.56 % (p < 0.05), while its viscosity and swelling power were notably decreased owing to the changes in molecular weight (from 106 to 104) and functional groups. Rheological analysis showed that oxidized deacetylated konjac glucomannan has the ability to form soft-textured gels and the potential to develop dysphagia foods. Future studies should focus on the gelation mechanisms of oxidized deacetylated konjac glucomannan.


Subject(s)
Gels , Mannans , Oxidation-Reduction , Ozone , Rheology , Mannans/chemistry , Viscosity , Ozone/chemistry , Gels/chemistry , Acetylation , Molecular Weight , Solubility , Amorphophallus/chemistry
11.
J Environ Sci (China) ; 144: 1-14, 2024 Oct.
Article in English | MEDLINE | ID: mdl-38802222

ABSTRACT

Nanoscale zero-valent iron (NZVI), which has the advantages of small particle size, large specific surface area, and high reactivity, is often injected into contaminated aquifers in the form of slurry. However, the prone to passivation and agglomeration as well as poor stability and mobility of NZVI limit the further application of this technology in fields. Therefore, sulfided NZVI loaded on reduced graphene oxide (S-NZVI/rGO) and guar gum (GG) with shear-thinning properties as stabilizers were used to synthesize S-NZVI/rGO@GG slurries. SEM, TEM, and FT-IR confirmed that the dispersion and anti-passivation of NZVI were optimized in the coupled system. The stability and mobility of the slurry were improved by increasing the GG concentration, enhancing the pH, and decreasing the ionic strength and the presence of Ca2+ ions, respectively. A modified advection-dispersion equation (ADE) was used to simulate the transport experiments considering the strain and physicochemical deposition/release. Meanwhile, colloidal filtration theory (CFT) demonstrated that Brownian motion plays a dominant role in the migration of S-NZVI/rGO@GG slurry, and the maximum migration distance can be increased by appropriately increasing the injection rate. Extended-Derjaguin-Landau-Verwey-Overbeek (XDLVO) theory showed that the excellent stability and migration of S-NZVI/rGO@GG slurry mainly came from the GG spatial forces. This study has important implications for the field injection of S-NZVI/rGO@GG slurry. According to the injection parameters, the injection range of S-NZVI/rGO@GG slurry is effectively controlled, which lays the foundation for the promotion of application in actual fields.


Subject(s)
Galactans , Graphite , Iron , Mannans , Plant Gums , Graphite/chemistry , Plant Gums/chemistry , Galactans/chemistry , Mannans/chemistry , Iron/chemistry , Models, Chemical , Metal Nanoparticles/chemistry
12.
Trop Anim Health Prod ; 56(5): 179, 2024 May 29.
Article in English | MEDLINE | ID: mdl-38809309

ABSTRACT

We evaluated the effects of supplementing yeast mannan-reach-fraction on growth performance, jejunal morphology and lymphoid tissue characteristics in weaned piglets challenged with E. Coli F4. A total of 20 crossbred piglets were used. At weaning, piglets were assigned at random to one of four groups: piglets challenged and fed the basal diet supplemented with yeast mannan-rich fraction (C-MRF, n = 5); piglets challenged and fed the basal diet (C-BD, n = 5); piglets not challenged and fed the basal diet supplemented with yeast mannan-rich fraction (NC-MRF, n = 5), and piglets not challenged and fed the basal diet (NC-BD). Each dietary treatment had five replicates. On days 4, 5 and 10, piglets were orally challenged with 108 CFU/mL of E. Coli F4. C-MRF piglets had higher BW (p = 0.002; interactive effect) than C-BD piglets. C-MRF piglets had higher (p = 0.02; interactive effect) ADG in comparison with C-BD piglets. C-MRF piglets had higher (p = 0.04; interactive effect) ADFI than C-BD piglets. The diameter of lymphoid follicles was larger (p = 0.010; interactive effect) in the tonsils of C-MRF piglets than C-BD piglets. Lymphoid cells proliferation was greater in the mesenteric lymphnodes and ileum (p = 0.04 and p = 0.03, respectively) of C-MRF piglets. A reduction (p > 0.05) in E. Coli adherence in the ileum of piglets fed MRF was observed. In conclusion, the results of the present study demonstrate that dietary yeast mannan-rich fraction supplementation was effective in protecting weaned piglets against E. Coli F4 challenge.


Subject(s)
Animal Feed , Diet , Dietary Supplements , Escherichia coli Infections , Escherichia coli , Lymphoid Tissue , Mannans , Swine Diseases , Animals , Dietary Supplements/analysis , Animal Feed/analysis , Mannans/administration & dosage , Mannans/pharmacology , Escherichia coli Infections/veterinary , Escherichia coli Infections/prevention & control , Swine/growth & development , Swine Diseases/prevention & control , Swine Diseases/microbiology , Diet/veterinary , Weaning , Intestines , Random Allocation , Jejunum , Male
13.
Int J Biol Macromol ; 269(Pt 2): 132175, 2024 Jun.
Article in English | MEDLINE | ID: mdl-38729497

ABSTRACT

Superhydrophilic/underwater superoleophobic materials for the separation of oil-water emulsions by filtration have received much attention in order to solve the pollution problem of oil-water emulsion. In this paper, a fence-like structure on the surface of CNF/KGM (Konjac Glucomannan) materials by a simple method using CNF instead of metal nanowires was successfully developed based on the hydrogen bonding of KGM and CNF. The resulted organic CNF/KGM materials surface has outstanding superhydrophilic (WCA = 0°) in air and superoleophobicity (OCA≥151°) in water, which could separate oil-water mixtures with high separation efficiency above 99.14 % under the pressure of the emulsion itself. The material shows good mechanical properties because of the addition of CNF and has outstanding anti-fouling property and reusability. More importantly, the material can be completely biodegraded after buried in soil for 4 weeks since both of KGM and CNF are organic substances. Therefore, it may have a broad application prospect in the separation of oil-water emulsion because of its outstanding separation properties, simply preparation method and biodegradability.


Subject(s)
Cellulose , Emulsions , Hydrophobic and Hydrophilic Interactions , Nanofibers , Oils , Water , Emulsions/chemistry , Nanofibers/chemistry , Oils/chemistry , Water/chemistry , Cellulose/chemistry , Surface Properties , Biodegradation, Environmental , Mannans/chemistry
14.
Int J Biol Macromol ; 269(Pt 1): 132051, 2024 Jun.
Article in English | MEDLINE | ID: mdl-38777687

ABSTRACT

The impact of guar gum (GG), crude algae ethanolic extract (CAEE), and turmeric essential oil (TEO) incorporated edible coating formulations on the quality of cut potatoes was investigated at room temperature (27 ±â€¯3 °C, 70-85 % RH) storage using a rotatable central composite design. Besides, 30 % glycerol, 5 % calcium chloride, and 3 % ascorbic acid (w/w) were added to the coating solution as additives. The surface color, respiration rate, water vapor transmission rate, visible mold growth, and sensory analysis were assessed after seven days of storage. The inclusion of ascorbic acid and TEO in edible coating demonstrated a more effective delay in browning. The coated potatoes had lower OTR, CTR, and WVTR values for GG concentrations of 0.5 to 1 g/100 mL than the control. Compared to additives, higher concentrations of GG improved response parameters. The WVTR value of coated potatoes was significantly impacted by the interaction between CAEE and TEO with GG. Incorporating CAEE and TEO into the formulations of guar gum led to a reduction in the permeability of the coating to oxygen and water vapor. The seven days of extended shelf life compared to two days of control were observed with the optimized coating formulation. Furthermore, the application of the coating treatment proved effective in preventing enzymatic browning and creating a barrier against moisture and gases, contributing to prolonged freshness during extended storage periods.


Subject(s)
Food Storage , Galactans , Mannans , Plant Gums , Solanum tuberosum , Plant Gums/chemistry , Galactans/chemistry , Mannans/chemistry , Mannans/pharmacology , Solanum tuberosum/chemistry , Food Storage/methods , Food Preservation/methods
15.
Int J Immunopathol Pharmacol ; 38: 3946320241249429, 2024.
Article in English | MEDLINE | ID: mdl-38721971

ABSTRACT

OBJECTIVE: This study investigated the raft-forming suspension of famotidine as an anti-reflux formulation to improve the oral bioavailability of narrow absorption window drugs by enhancing gastric residence time (GRT) and preventing gastro-esophageal reflux disease (GERD). METHOD: Various combinations of raft-forming agents, such as Tragacanth gum (TG), guar gum (GG), and xanthan gum (XG), were evaluated alongside sodium alginate (SA) to develop an effective raft. Preformulation studies and preliminary screening were conducted to identify the most suitable raft-forming agent, and GG was chosen due to its mucilaginous properties. The formulation was optimized using a 32 full factorial design, with the quantities of GG and SA as independent factors and apparent viscosity and in-vitro drug release (%) as dependent factors. The in vivo floating behavior study was performed for optimized and stabilized formulation. RESULTS: Among the tested batches, F6 was selected as the optimized formulation. It exhibited desirable characteristics such as adequate raft weight for extended floating in gastric fluid, improved apparent viscosity, and a significant percentage of drug release at 12 h. A mathematical model was applied to the in-vitro data to gain insights into the drug release mechanism of the formulation. The stability of the suspension was assessed under accelerated conditions, and it demonstrated satisfactory stability. The formulation remains floating in the Rabbit stomach for more than 12 h. CONCLUSION: It concludes that the developed formulation has enhanced bioavailability in the combination of GG and SA. The floating layer of the raft prevents acid reflux, and the famotidine is retained for an extended period of time in the gastric region, preventing excess acid secretion. The developed formulations are effective for stomach ulcers and GERD, with the effect of reducing acid secretion by H2 receptor antagonists.


Subject(s)
Drug Delivery Systems , Famotidine , Galactans , Famotidine/administration & dosage , Famotidine/pharmacokinetics , Animals , Drug Delivery Systems/methods , Drug Liberation , Alginates , Gastroesophageal Reflux/drug therapy , Gastroesophageal Reflux/metabolism , Biological Availability , Mannans/administration & dosage , Plant Gums , Viscosity , Male , Rabbits , Gastric Mucosa/metabolism , Gastric Mucosa/drug effects , Polysaccharides, Bacterial , Drug Stability , Administration, Oral
16.
Food Res Int ; 187: 114329, 2024 Jul.
Article in English | MEDLINE | ID: mdl-38763632

ABSTRACT

The utilization of non-animal-derived materials to imitate cartilage is critical for the advancement of plant-based simulated meat. In this study, gellan gum (GG), konjac glucomannan (KGM), and wheat fiber (WF) were used to construct hydrogel, and the mechanical strength, water properties, and microstructure were regulated by constructing Ca2+ cross-links and moisture control. The hardness, chewiness, resilience, shear force, and shear energy of the Ca2+ cross-linked samples were significantly improved. Extrusion dehydration further changes the related mechanical properties of the hydrogel and results in a tighter microstructure. The findings suggest that the establishment of Ca2+ cross-links and water regulation are efficacious techniques for modifying the texture of the GG/KGM/WF composite hydrogel. Correlation analysis and sensory evaluation showed that the test indexes and sensory scores of the samples with Ca2+ crosslinking and 80 % moisture content were similar to chicken breast cartilage, and the samples with Ca2+ crosslinking and 70 % moisture content were similar to pig crescent bone. This study presents a framework for designing edible cartilage simulators using polysaccharide hydrogels, with implications for enhancing the resemblance of plant-based meat products to real meat and expanding the range of vegetarian offerings available.


Subject(s)
Hydrogels , Mannans , Polysaccharides, Bacterial , Triticum , Polysaccharides, Bacterial/chemistry , Mannans/chemistry , Animals , Hydrogels/chemistry , Triticum/chemistry , Cartilage/chemistry , Water/chemistry , Cross-Linking Reagents/chemistry , Chickens , Calcium/analysis , Calcium/chemistry , Dietary Fiber/analysis
17.
Food Res Int ; 187: 114425, 2024 Jul.
Article in English | MEDLINE | ID: mdl-38763673

ABSTRACT

In this study, composite gel was prepared from konjac glucomannan (KGM) and fibrin (FN). Composite gels with different concentration ratios were compared in terms of their mechanical properties, rheological properties, water retention, degradation rate, microstructure and biocompatibility. The results showed that the composite gels had better gel strength and other properties than non-composite gels. In particular, composite hydrogels with low Young's modulus formed when the KGM concentration was 0.8% and the FN concentration was 1.2%. The two components were cross linked through hydrogen-bond interaction, which formed a more stable gel structure with excellent water retention and in-vitro degradation rates, which were conducive to myogenic differentiation of ectomesenchymal stem cells (EMSCs). KGM-FN composite gel was applied to the preparation of cell-culture meat, which had similar texture properties and main nutrients to animal meat as well as higher content of dry base protein and dry base carbohydrate.


Subject(s)
Fibrin , Hydrogels , Mannans , Rheology , Mannans/chemistry , Hydrogels/chemistry , Fibrin/chemistry , Animals , Tissue Scaffolds/chemistry , Mesenchymal Stem Cells , Meat , Cell Differentiation , Elastic Modulus , Cell Culture Techniques
18.
J Med Invest ; 71(1.2): 121-128, 2024.
Article in English | MEDLINE | ID: mdl-38735707

ABSTRACT

OBJECTIVES: Partially hydrolyzed guar gum (PHGG) is a soluble dietary fiber;in addition to improving bowel movements, it maintains intestinal health by producing short-chain fatty acids. However, majority of clinical studies on PHGG have been concluded within a month and excluded usual drug therapy. Hence, this study aimed to determine the effects of long-term consumption of PHGG, in combination with drug therapy, on gut bacteria ratios, laboratory values for inflammatory response, and fecal characteristics. METHODS AND RESULTS: The study was performed in patients with irritable bowel syndrome (IBS), Crohn's disease (CD), and ulcerative colitis (UC), by the administration of PHGG for six months while they continued their usual treatment. PHGG treatment caused significant changes in patients with IBS, including an increase in the abundance of short-chain fatty acid-producing bacteria, a significant decrease in Bacteroides abundance, and normalization of the Bristol scale of stool. In patients with UC, non-significant normalization of soft stools and decrease in fecal calprotectin were observed. Adverse events were not observed in any of the groups. CONCLUSION: Thus, it would be beneficial to include PHGG in the usual drug therapies of patients with IBS. J. Med. Invest. 71 : 121-128, February, 2024.


Subject(s)
Dietary Fiber , Galactans , Gastrointestinal Microbiome , Irritable Bowel Syndrome , Mannans , Plant Gums , Humans , Gastrointestinal Microbiome/drug effects , Irritable Bowel Syndrome/drug therapy , Irritable Bowel Syndrome/microbiology , Male , Female , Dietary Fiber/administration & dosage , Adult , Middle Aged , Mannans/administration & dosage , Plant Gums/administration & dosage , Galactans/administration & dosage , Inflammatory Bowel Diseases/drug therapy , Feces/microbiology , Feces/chemistry , Fatty Acids, Volatile/analysis , Fatty Acids, Volatile/metabolism
19.
Langmuir ; 40(19): 10305-10312, 2024 May 14.
Article in English | MEDLINE | ID: mdl-38696716

ABSTRACT

The limited elasticity and inadequate bonding of hydrogels made from guar gum (GG) significantly hinder their widespread implementation in personalized wearable flexible electronics. In this study, we devise GG-based self-adhesive hydrogels by creating an interpenetrating network of GG cross-linked with acrylic, 4-vinylphenylboronic acid, and Ca2+. With the leverage of the dynamic interactions (hydrogen bonds, borate ester bonds, and coordination bonds) between -OH in GG and monomers, the hydrogel exhibits a high stretchability of 700%, superior mechanical stress of 110 kPa, and robust adherence to several substrates. The adhesion strength of 54 kPa on porcine skin is obtained. Furthermore, the self-adhesive hydrogel possesses stable conductivity, an elevated gauge factor (GF), and commendable durability. It can be affixed to the human body as a strain sensor to obtain precise monitoring of human movement behavior. Our research offers possibilities for the development of GG-based hydrogels and applications in wearable electronics and medical monitoring.


Subject(s)
Electric Conductivity , Galactans , Hydrogels , Mannans , Plant Gums , Hydrogels/chemistry , Mannans/chemistry , Plant Gums/chemistry , Galactans/chemistry , Animals , Wearable Electronic Devices , Humans , Swine , Adhesives/chemistry
20.
Int J Mol Sci ; 25(9)2024 Apr 28.
Article in English | MEDLINE | ID: mdl-38732045

ABSTRACT

In the absence of naturally available galactofuranose-specific lectin, we report herein the bioengineering of GalfNeoLect, from the first cloned wild-type galactofuranosidase (Streptomyces sp. strain JHA19), which recognises and binds a single monosaccharide that is only related to nonmammalian species, usually pathogenic microorganisms. We kinetically characterised the GalfNeoLect to confirm attenuation of hydrolytic activity and used competitive inhibition assay, with close structural analogues of Galf, to show that it conserved interaction with its original substrate. We synthetised the bovine serum albumin-based neoglycoprotein (GalfNGP), carrying the multivalent Galf units, as a suitable ligand and high-avidity system for the recognition of GalfNeoLect which we successfully tested directly with the galactomannan spores of Aspergillus brasiliensis (ATCC 16404). Altogether, our results indicate that GalfNeoLect has the necessary versatility and plasticity to be used in both research and diagnostic lectin-based applications.


Subject(s)
Galactose , Galactose/analogs & derivatives , Galactose/metabolism , Galactose/chemistry , Aspergillus/metabolism , Aspergillus/genetics , Lectins/metabolism , Lectins/chemistry , Glycoproteins/chemistry , Glycoproteins/metabolism , Mannans/chemistry , Animals , Serum Albumin, Bovine/chemistry
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