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This study aimed to develop three formulations of cereal flours: control cereal flour (CCF), probiotic cereal flour (PCF), and symbiotic cereal flour (SCF), and porridges from the flours were manufactured as a functional food. No significant differences were observed in the microbiological quality and the color of the flours for 150 days. The technological and functional potential of the flours were variously improved with the addition of Bacillus coagulans as a probiotic and beta-glucan as a prebiotic. The addition of beta-glucan fiber did not change the viability of the probiotic, which was higher than 7.45 log CFU/g for SCF and 7.13 log CFU/g for PCF until the end of the storage period. All porridge samples showed non-Newtonian fluid behavior with pseudoplastic characteristics; and the PCF and SCF porridges differed regarding the parameters of hardness (1.10 to 1.38 N), adhesiveness (5.88 to 8.86 mJ), cohesiveness (0.78 to 0.95) and gumminess (0.93 to 1.52 N) over time. The addition of the beta-glucan prebiotic interfered with these attributes due to its gelling capacity in the presence of water. The PCF obtained the best sensory acceptance scores when compared to the other formulations. The addition of Bacillus coagulans and beta-glucan did not interfere with thermographic behavior. The SCF differed in the observed crystallinity parameters from CCF and PCF, with the presence of larger solids and agglomerates.
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To investigate de effect of PAb gel on the bone tissue of rats submitted to Bisphosphonate-related osteonecrosis of the jaws (BRONJ). Initially, 54 animals were submitted to BRONJ model by Zoledronic Acid (ZA) (0.1 mg/kg 3x/wk for 9 wk, ip), followed by the 1st upper left molar extraction at the 8th wk. After tooth removal, the animals were divided into 3 groups, ZA that received placebo gel or PAb gel that received 1% PAb gel, inside the dental alveolus. The control Group (CONTROL) received 0.1 mg/kg of 0.9% saline and then placebo gel. Three weeks after tooth extraction, the animals were euthanized, and maxillae were colleted for macroscopic, radiographic, histological and Raman spectomery assays. Additionally, GSK3b, beta-catenin, and Runx2 mRNA expressions were determined. Blood samples were collected for the analysis of Bone-specific alkaline phosphatase (BALP) levels. PAb gel improved mucosal healing, increased the number of viable osteocytes, while it reduced the number of empty lacunae, as well as the amount of bone sequestration. Furthermore, PAb gel positively influenced the number and functionality of osteoblasts by stimulating Wnt signaling, thereby inducing bone remodeling. Additionally, PAb gel contributed to improved bone quality, as evidenced by an increase in bone mineral content, a decrease in bone solubility, and an enhancement in the quality of collagen, particularly type I collagen. PAb gel mitigated bone necrosis by stimulating of bone remodeling through Wnt signaling and concurrently improved bone quality. PAb gel emerges as a promising pharmacological tool for aiding in BRONJ therapy or potentially preventing the development of BRONJ.
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Agaricus , Osteonecrose da Arcada Osseodentária Associada a Difosfonatos , Conservadores da Densidade Óssea , Animais , Ratos , Osteonecrose da Arcada Osseodentária Associada a Difosfonatos/tratamento farmacológico , Osteonecrose da Arcada Osseodentária Associada a Difosfonatos/etiologia , Osteonecrose da Arcada Osseodentária Associada a Difosfonatos/patologia , Difosfonatos , Maxila/patologia , Extração Dentária , Via de Sinalização Wnt , Ácido ZoledrônicoRESUMO
The effects of supplementing the diet of sows with ßG-(1,3) derived from Euglena gracilis algae were assessed regarding quality and amount of colostrum as well as performance of piglets. A total of 120 sows (first (nulliparous) to sixth parity (multiparous)) from D85 of gestation until weaning were divided into two groups: the control diet group (n = 60) and the ßG-(1,3) diet group (n = 60). Sows receiving ßG-(1,3) exhibited an average increase of 870 g (24.9%) in colostrum production, leading to a 25.17% higher intake of colostrum by piglets. Furthermore, piglets in the ßG-(1,3) group showed significantly superior weight gain of 34 g (50%) compared to the control group 18 h after birth (p < 0.05). Sows fed with ßG-(1,3) produced colostrum with significantly higher concentrations of IgG (5.914 mg/mL, 16.16%) and IgM (0.378 mg/mL, 16.29%) than the control group (p < 0.05). Similarly, serum concentrations of IgG (13.86 mg/mL, 51.25%), IgA (17.16 mg/mL, 120.19%), and IgM (13.23 mg/mL, 144.78%) were significantly higher in sows fed with ßG-(1,3) than in the control group (p < 0.05). Supplementing sows with ßG-(1,3) derived from the Euglena gracilis algae resulted in increased colostrum production and consumption, along with greater weight gain in piglets during the first 18 h after birth. Additionally, both the colostrum produced by the sows and the blood serum of the piglets exhibited higher concentrations of immunoglobulins.
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Cereal ß-glucans are beneficial health ingredients that reduce cholesterolemia and postprandial glycaemia. However, their impact on digestive hormones and gut microbiota is not yet fully established. Two randomized, double-blind, controlled studies were conducted. In the first study, 14 subjects ingested a breakfast with or without ß-glucan from oats (5.2 g). Compared to the control, ß-glucan increased orocecal transit time (p = 0.028) and decreased mean appetite score (p = 0.014) and postprandial plasma ghrelin (p = 0.030), C-peptide (p = 0.001), insulin (p = 0.06), and glucose (p = 0.0006). ß-glucan increased plasma GIP (p = 0.035) and PP (p = 0.018) without affecting leptin, GLP-1, PYY, glucagon, amylin, or 7α-hydroxy-4-cholesten-3-one, a biomarker of bile acid synthesis. In the second study, 32 subjects were distributed into 2 groups to ingest daily foods with (3 g/day) or without ß-glucan for 3 weeks; stools were collected before/after treatment. No changes in fecal microbiota composition/diversity (deep sequencing) were detected with ß-glucans. These results indicate that acute intake of 5 g ß-glucan slows transit time and decreases hunger sensation and postprandial glycaemia without affecting bile-acid synthesis, these changes being associated with decreased plasma insulin, C-peptide, and ghrelin, and increased plasma GIP and PP. However, regular daily intake of 3 g ß-glucan is not sufficient to have an effect on fecal microbiota composition.
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The effects of yeast cell wall compounds (YCWs) being added to cat food on hindgut fermentation metabolites and fecal microbiota were assessed in in vivo Experiment 1 (Exp. 1) and in vitro Experiments 2 and 3 (Exp. 2 and 3). In Exp. 1, the cats' diets were supplemented with two dietary concentrations (46.2 and 92.4 ppm) of YCWs (YCW-15 and YCW-30, respectively), and a negative control diet with no compound in three groups (six cats per group) was used to assess the fecal score, pH, digestibility, fermentation products, and microbiota. In Exp. 2, feces from the cats that were not supplemented with YCWs (control) were used as an inoculum. A blend of pectin, amino acids, and cellulose was used as a substrate, and the YCW compound was added at two levels (5 and 10 mg). In Exp. 3, feces from cats fed YCWs were used as an inoculum to test three different substrates (pectin, amino acids, and cellulose). In Exp. 2 and 3, the gas production, pH, and fermentation products (ammonia, SCFAs, and BCFAs) were assessed. YCW-30 resulted in a higher digestibility coefficient of the crude protein, organic matter (OM) (p < 0.05), and energy of the diet (p < 0.10). Regarding the fermentation products, YCW-15 showed a trend toward higher concentrations of propionate, acetate, lactate, ammonia, isobutyrate, and valerate, while YCW-30 showed a trend (p < 0.10) toward higher levels of butyrate and pH values. The bacteroidia class and the genus Prevotella were increased by using YCW-30 and the control. At the gender level, decreased (p < 0.01) Megasphaera was observed with YCW inclusion. The microbiota differed (p < 0.01) among the groups in their Shannon indexes. For beta diversity, YCW-30 showed higher indexes (p = 0.008) than the control. The microbiota metabolic profile differed in the pathway CENTFERM-PWY; it was more expressed in YCW-30 compared to the control. In Exp. 2, the YCWs showed a higher ratio (p = 0.006) of the fermentation products in the treatments with additives with a trend towards a high dose of the additive (10 mg). In Exp. 3, the effects of the substrates (p < 0.001), but not of the YCWs, on the fermentation products were observed, perhaps due to the low dietary concentrations we used. However, the marked responses of the fermentation products to the substrates validated the methodology. We could conclude that the YCWs, even at low dietary concentrations, affected fecal SCFA production, reduced the fecal pH, and modulated the fecal microbiota in the cats. These responses were more pronounced under in vitro conditions.
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BACKGROUND & AIMS: It is well known that dietary fiber positively impacts the microbiome and health as a whole. However, the health effects of ß-glucan, a dietary fiber extracted from oats, have been questioned when administered alone or incorporated into other foods. The purpose of this systematic review and meta-analysis was to evaluate the impact of oats or ß-glucan supplements on the lipid profile. METHODS: Randomized controlled trials with parallel-arm or crossover blinded interventions at least two weeks in duration, for hyperlipidemic or non-hyperlipidemic men and women ≥18 years of age were selected. Only single (participants blinded) or double-blinded studies that compared oat or isolated ß-glucan with a placebo/control group were considered for this review. The databases EMBASE, PubMed, Web of science and CINHAL were searched, from the earliest indexed year available online to the end of January 2022. Random-effects models were used to combine the estimated effects extracted from individual studies, and data were summarized as standardized mean difference (SMD) and 95% confidence interval (95%CI). RESULTS: A total of 811 articles were screened for eligibility, and relevant data were extracted from 28 studies, totaling 1494 subjects. Oat interventions TC (-0.61, 95%CI: -0.84;-0.39, p < 0.00001, and -0.70, 95%CI: -1.07;-0.34, p = 0.0002, respectively) and LDL (-0.51, 95%CI: -0.71;-0.31, p < 0.00001, and -0.38, 95%CI: -0.60;-0.15, p = 0.001, respectively). Moreover, isolated ß-glucan interventions from parallel-arm studies decreased TC (-0.73, 95%CI: -1.01;-0.45, p < 0.00001), LDL (-0.58, 95%CI: -0.85;-0.32, p < 0.0001) and triglycerides (-0.30, 95%CI: -0.49;-0.12, p = 0.001). HDL was not altered by either oat or isolated ß-glucan (p > 0.05). CONCLUSION: Overall, this review showed that both oat and isolated ß-glucan interventions improved lipid profiles. Furthermore, the ingestion of oats or isolated ß-glucan supplements are effective tools to combat dyslipidemia and should be considered in cardiovascular disease prevention.
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beta-Glucanas , Masculino , Humanos , Feminino , beta-Glucanas/farmacologia , Avena , Ensaios Clínicos Controlados Aleatórios como Assunto , Triglicerídeos , Suplementos Nutricionais , Grão Comestível , Fibras na Dieta/farmacologiaRESUMO
BACKGROUND: Obesity is one of the most common nutritional disorders in dogs and cats and is related to the development metabolic comorbidities. Weight loss is the recommended treatment, but success is difficult due to the poor satiety control. Yeast beta-glucans are known as biological modifiers because of their innumerable functions reported in studies with mice and humans, but only one study with dogs was found. This study aimed to evaluate the effects of a diet supplemented with 0.1% beta-glucan on glucose, lipid homeostasis, inflammatory cytokines and satiety parameters in obese dogs. Fourteen dogs composed three experimental groups: Obese group (OG) with seven dogs with body condition score (BCS) 8 or 9; Lean group (LG) included seven non-obese dogs with a BCS of 5; and Supplemented Obese group (SOG) was the OG dogs after 90 days of consumption of the experimental diet. RESULTS: Compared to OG, SOG had lower plasma basal glycemic values (p = 0.05) and reduced serum cholesterol and triglyceride levels. TNF-α was lower in SOG than in OG (p = 0.05), and GLP-1 was increased in SOG compared to OG and LG (p = 0.02). CONCLUSION: These results are novel and important for recognizing the possibility of using beta-glucan in obesity prevention and treatment.
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Suplementos Nutricionais , Doenças do Cão , Resistência à Insulina , Obesidade , beta-Glucanas , Animais , Dieta/veterinária , Doenças do Cão/tratamento farmacológico , Doenças do Cão/metabolismo , Cães , Insulina , Obesidade/metabolismo , Obesidade/veterinária , Saccharomyces cerevisiae/química , beta-Glucanas/administração & dosagemRESUMO
A busca por custo x benefício na avicultura envolve compreender como melhorar o desempenho animal através da alimentação ao mesmo tempo em que haja diminuição dos custos. Tendo em vista o crescente aumento monetário da matéria prima da ração, várias pesquisas se voltam para novas fontes energéticas derivados de plantas, que contem quantidades significativas de fibras e agem como fatores antinutricionais, interferindo no desempenho zootécnico das aves. Os principais componentes das fibras, as beta glucanas e xilanas, podem ser quebradas e melhor aproveitadas quando no uso de enzimas exógenas chamadas de carboidrases, sendo a beta glucanase e xilase as respectivas enzimas que fazem a lise desses componentes. É necessário, portanto, melhor compreensão da forma de ação de cada enzima, assim como a fonte nutritiva das bases alimentares alternativas. Essa obra tem por objetivo abordar e revisar as duas principais fontes de fibras, beta glucanas e xilanas, e suas respectivas enzimas, beta glucanase e xilase.(AU)
The pursuit for cost-benefit in poultry farming involves understanding how to improve animal performance through feeding while reducing costs. In view of the growing monetary increase in feed raw material, several researches are focused on new energy sources derived from plants, which contain significant amounts of fiber and act as anti-nutritional factors, interfering with the zootechnical performance of birds. The main components of fiber, beta glucans and xylans, can be broken down and better utilized when using exogenous enzymes called carbohydrases, with beta glucanase and xylase being the respective enzymes that lyse these components. It is therefore necessary to better understand the mode of action of each enzyme, as well as the nutritive source of alternative food bases. This work aims to address and review the two main sources of fiber, beta glucans and xylans, and their respective enzymes, beta glucanase and xylase.(AU)
La búsqueda de la relación costo-beneficio en la avicultura implica comprender cómo mejorar el rendimiento animal a través de la alimentación y reducir los costos. Ante el creciente aumento monetario de la materia prima de los alimentos, varias investigaciones se enfocan en nuevas fuentes de energía derivadas de las plantas, que contienen cantidades significativas de fibra y actúan como factores antinutricionales, interfiriendo en el desempeño zootécnico de las aves. Los principales componentes de la fibra, los betaglucanos y los xilanos, se pueden descomponer y utilizar mejor cuando se usan enzimas exógenas llamadas carbohidrasas, siendo la betaglucanasa y la xilasa las enzimas respectivas que lisan estos componentes. Por lo tanto, es necesario comprender mejor el modo de acción de cada enzima, así como la fuente nutritiva de las bases alimenticias alternativas. Este trabajo tiene como objetivo abordar y revisar las dos principales fuentes de fibra, beta glucanos y xilanos, y sus respectivas enzimas, beta glucanasa y xilasa.(AU)
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Animais , Aves Domésticas/fisiologia , Xilanos/análise , beta-Glucanas/análise , Fenômenos Fisiológicos da Nutrição Animal/fisiologia , Ração Animal/análiseRESUMO
Abstract Introduction: As a supplement, beta-glucan has various therapeutic healing effects generated by the immune cells. It has been scientifically approved and proven to be a biological defense modifier. The aim of this study was to investigate the effects of beta-glucan on treatments administered in an acute otitis media model Objectives: This study investigated the effect of beta-glucan on the treatment of acute otitis media in an acute otitis media -induced animal model. Efficacy was evaluated both immunologically and histologically. Methods: The study sample comprised 35 adult rats, randomly separated into 5 groups of 7: Group 1 (control), Group 2 (acute otitis media, no treatment), Group 3 (acute otitis media + antibiotic), Group 4 (acute otitis media + beta-glucan) and Group 5 (acute otitis media + beta-glucan + antibiotic). Analyses were made of the histopathology and immunology examination results in respect of thickening of the tympanic membrane, epithelium damage, inflammation, and sclerosis. In all groups the serum levels of TNF-α, IL-4, IL-6 and IL-1β were evaluated. Results: All serum cytokine levels were significantly lower in the beta-glucan and antibiotictreated groups compared to the acute otitis media Group. Significant differences in tympanic membrane thickness, inflammation, epithelium damage, and sclerosis values were observed between the acute otitis media + antibiotic and acute otitis media + beta-glucan Groups. According to these parameters, the values in aute otitis media + antibiotic + beta-glucan Group were markedly lower than those of the other groups. There was a significant difference in the acute otitis media + antibiotic + beta-glucan Groups compared to acute otitis media Group (p < 0.001). Conclusions: Both antibiotic and beta-glucan treatment reduced acute otitis media signs of inflammations in an acute otitis media-induced rat model, decreasing histological damage and cytokine levels. Co-administration of antibiotic and beta-glucan led to a significant reduction in tympanic membrane thickness, inflammation, and epithelium damage. Antibiotic + beta-glucan treatment resulted in a greater decrease in tympanic membrane thickness, inflammation, and epithelium damage than in the other groups. From these results, it can be suggested that beta-glucan, in combination with antibiotics may provide an alternative for the treatment of acute otitis media.
Resumo Introdução: Como suplemento, o beta-glucano apresenta vários efeitos terapêuticos gerados pelas células imunológicas. Cientificamente aprovado, mostrou ser um modificador de defesa biológica. Objetivo: Investigar os efeitos do beta-glucano nos tratamentos administrados em um modelo de otite média aguda induzida em um modeloanimal. A eficácia foi avaliada imunológica e histologicamente. Método: A amostra do estudo foi composta por 35 ratos adultos, divididos aleatoriamente em 5 grupos de 7: grupo 1 (controle), grupo 2 (otite média aguda, sem tratamento), grupo 3 (otite média aguda + antibiótico), grupo 4 (otite média aguda + beta-glucano) e grupo 5 (otite média aguda + beta-glucano + antibiótico). Foram feitas análises dos resultados dos exames histopatológicos e imunológicos em relação ao espessamento da membrana timpânica, dano ao epitélio, inflamação e esclerose. Os níveis séricos de TNF-α, IL-4, IL-6 e IL-β foram avaliados em todos os grupos. Resultados: Todos os níveis séricos de citocinas foram significativamente mais baixos nos grupos tratados com beta-glucano e antibióticos em comparação com o grupo otite média aguda. Diferenças significativas na espessura da membrana timpânica, inflamação, dano do epitélio e esclerose foram observadas entre os grupos otite média aguda + antibiótico e otite média aguda + beta-glucano. De acordo com esses parâmetros, os valores no grupo otite média aguda + antibiótico + beta-glucano foram acentuadamente inferiores aos dos demais grupos. Houve uma diferença significante no grupo otite média aguda + antibiótico + beta-glucano em comparação ao grupo otite média aguda (p < 0,001). Conclusão: Ambos os tratamentos com antibiótico e com beta-glucano reduziram os sinais de inflamação da otite média aguda em um modelo de rato com otite média aguda induzida, diminuíram os danos histológicos e os níveis de citocinas. A administração concomitante de antibiótico e beta-glucano levou a uma redução significativa na espessura da membrana timpânica, inflamação e danos ao epitélio. O tratamento com antibióticos + beta-glucano resultou em maior diminuição na espessura da membrana timpânica, inflamação e danos no epitélio do que nos outros grupos. A partir desses resultados, pode-se sugerir que o beta-glucano, em combinação com antibióticos, pode fornecer uma opção para o tratamento da otite média aguda.
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Animais , Ratos , Otite Média/tratamento farmacológico , beta-Glucanas , Membrana Timpânica , Doença Aguda , Citocinas , Antibacterianos/uso terapêuticoRESUMO
BACKGROUND: 1,3-beta-D-glucan (BG) is a ubiquitous cell wall component of gut micro-organisms. We hypothesized that the serum levels of BG could reflect active intestinal inflammation in patients with inflammatory bowel disease. AIM: To determine whether the serum BG concentrations correlate with intestinal inflammation. METHODS: A prospective observational study was performed in a tertiary referral center, from 2016 to 2019, in which serum BG was determined in 115 patients with Crohn's disease (CD), 51 with ulcerative colitis (UC), and 82 controls using a photometric detection kit. Inflammatory activity was determined by ileocolonoscopy, histopathology, magnetic resonance enterography, and biomarkers, including fecal calprotectin (FC), C-reactive protein, and a panel of cytokines. The ability of BG to detect active vs inactive disease was assessed using the area under the receiver operating characteristic curve. In subgroup analysis, serial BG was used to assess the response to therapeutic interventions. RESULTS: The serum BG levels were higher in CD patients than in controls (P = 0.0001). The BG levels paralleled the endoscopic activity in CD patients and histologic activity and combined endoscopic and histologic activity in both CD and UC patients. The area under the curve (AUC) in receiver operating characteristic analysis to predict endoscopic activity was 0.694 [95% confidence interval (CI): 0.60-0.79; P = 0.001] in CD, and 0.662 (95%CI: 0.51-0.81; P = 0.066) in UC patients. The AUC in receiver operating characteristic analysis to predict histologic activity was 0.860 (95%CI: 0.77-0.95; P < 0.001) in CD, and 0.786 (95%CI: 0.57-0.99; P = 0.015) in UC patients. The cut-off values of BG for both endoscopic and histologic activity were 60 µg/mL in CD, and 40 µg/mL in UC patients. Performance analysis showed that the results based on BG of 40 and 60 µg/mL were more specific for predicting endoscopic activity (71.8% and 87.2% for CD; and 87.5% and 87.5% for UC, respectively) than FC (53.3% and 66.7% for CD; and 20% and 80% for UC, respectively); and also histologic activity (60.5% and 76.3% for CD; and 90.0% and 95.0% for UC, respectively) than FC (41.7% and 50.0% for CD; and 25% and 50% for UC, respectively). Regarding the clinical, endoscopic, and histologic activities, the BG levels were reduced following therapeutic intervention in patients with CD (P < 0.0001) and UC (P = 0.003). Compared with endoscopic (AUC: 0.693; P = 0.002) and histologic (AUC: 0.868; P < 0.001) activity, no significant correlation was found between serum BG and transmural healing based on magnetic resonance enterography (AUC: 0.576; P = 0.192). Positive correlations were detected between BG and IL-17 in the CD (r: 0.737; P = 0.001) and the UC group (r: 0.574; P = 0.005), and between BG and interferon-gamma in the CD group (r: 0.597; P = 0.015). CONCLUSION: Serum BG may represent an important novel noninvasive approach for detecting mucosal inflammation and therapeutically monitoring inflammatory bowel diseases, particularly in CD.
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Colite Ulcerativa , Doença de Crohn , Doenças Inflamatórias Intestinais , beta-Glucanas , Biomarcadores , Colite Ulcerativa/diagnóstico , Doença de Crohn/diagnóstico , Fezes , Humanos , Complexo Antígeno L1 Leucocitário , Índice de Gravidade de DoençaRESUMO
INTRODUCTION: As a supplement, beta-glucan has various therapeutic healing effects generated by the immune cells. It has been scientifically approved and proven to be a biological defense modifier. The aim of this study was to investigate the effects of beta-glucan on treatments administered in an acute otitis media model OBJECTIVES: This study investigated the effect of beta-glucan on the treatment of acute otitis media in an acute otitis media -induced animal model. Efficacy was evaluated both immunologically and histologically. METHODS: The study sample comprised 35 adult rats, randomly separated into 5 groups of 7: Group 1 (control), Group 2 (acute otitis media, no treatment), Group 3 (acute otitis media+antibiotic), Group 4 (acute otitis media+beta-glucan) and Group 5 (acute otitis media+beta-glucan+antibiotic). Analyses were made of the histopathology and immunology examination results in respect of thickening of the tympanic membrane, epithelium damage, inflammation, and sclerosis. In all groups the serum levels of TNF-α, IL-4, IL-6 and IL-1ß were evaluated. RESULTS: All serum cytokine levels were significantly lower in the beta-glucan and antibiotic-treated groups compared to the acute otitis media Group. Significant differences in tympanic membrane thickness, inflammation, epithelium damage, and sclerosis values were observed between the acute otitis media+antibiotic and acute otitis media+beta-glucan Groups. According to these parameters, the values in aute otitis media+antibiotic+beta-glucan Group were markedly lower than those of the other groups. There was a significant difference in the acute otitis media+antibiotic+beta-glucan Groups compared to acute otitis media Group (p < 0.001). CONCLUSIONS: Both antibiotic and beta-glucan treatment reduced acute otitis media signs of inflammations in an acute otitis media-induced rat model, decreasing histological damage and cytokine levels. Co-administration of antibiotic and beta-glucan led to a significant reduction in tympanic membrane thickness, inflammation, and epithelium damage. Antibiotic+beta-glucan treatment resulted in a greater decrease in tympanic membrane thickness, inflammation, and epithelium damage than in the other groups. From these results, it can be suggested that beta-glucan, in combination with antibiotics may provide an alternative for the treatment of acute otitis media.
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Otite Média , beta-Glucanas , Doença Aguda , Animais , Antibacterianos/uso terapêutico , Citocinas , Otite Média/tratamento farmacológico , Ratos , Membrana TimpânicaRESUMO
In the efficient bioconversion of polysaccharides from lignocellulosic biomass, endoglucanases and ß-glucosidases are key enzymes for the deconstruction of ß-glucans. In this work, we focused on a GH8 endoglucanase (Cel8Pa) and a GH1 ß-glucosidase (Bg1Pa) from Paenibacillus xylanivorans A59. Cel8Pa was active on a broad range of substrates, such as ß-glucan from barley (24.5 IU/mg), lichenan (17.9 IU/mg), phosphoric acid swollen cellulose (PASC) (9.7 IU/mg), carboxi-methylcellulose (CMC) (7.3 IU/mg), chitosan (1.4 IU/mg) and xylan (0.4 IU/mg). Bg1Pa was active on cellobiose (C2) and cello-oligosaccharides up to C6, releasing glucose as the main product. When both enzymes were used jointly, there was a synergic effect in the conversion rate of polysaccharides to glucose. Cel8Pa and Bg1Pa presented important properties for simultaneous saccharification and fermentation (SSF) processes in second generation bioethanol production, such as tolerance to high concentration of glucose and ethanol.
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Background: The COVID-19 pandemic has been causing varying severities of illness. Some are asymptomatic and some develop severe disease leading to mortality across ages. This contrast triggered us explore the causes, with the background that a vaccine for effective immunization or a drug to tackle COVID-19 is not too close to reality. We have discussed strategies to combat COVID-19 through immune enhancement, using simple measures including nutritional supplements. Discussion: A literature search on mortality-related comorbid conditions was performed. For those conditions, we analyzed the pro-inflammatory cytokines, which could cause the draining of the immune reservoir. We also analyzed the immune markers necessary for the defense mechanism/immune surveillance against COVID-19, especially through simple means including immune enhancing nutritional supplement consumption, and we suggest strategies to combat COVID-19. Major comorbid conditions associated with increased mortality include cardiovascular disease (CVD), diabetes, being immunocompromised by cancer, and severe kidney disease with a senile immune system. Consumption of Aureobasidium pullulans strain (AFO-202) beta 1,3-1,6 glucan supported enhanced IL-8, sFAS macrophage activity, and NK cells' cytotoxicity, which are major defense mechanisms against viral infection. Conclusion: People with co-morbid conditions who are more prone to COVID-19-related deaths due to immune dysregulation are likely to benefit from consuming nutritional supplements that enhance the immune system. We recommend clinical studies to validate AFO-202 beta glucan in COVID-19 patients to prove its efficacy in overcoming a hyper-inflammation status, thus reducing the mortality, until a definite vaccine is made available.
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Betacoronavirus , Doenças Cardiovasculares/epidemiologia , Infecções por Coronavirus/epidemiologia , Infecções por Coronavirus/imunologia , Diabetes Mellitus/epidemiologia , Suplementos Nutricionais , Neoplasias/epidemiologia , Pneumonia Viral/epidemiologia , Pneumonia Viral/imunologia , Insuficiência Renal Crônica/epidemiologia , Actinobacteria/química , Biomarcadores/sangue , COVID-19 , Doenças Cardiovasculares/imunologia , Comorbidade , Infecções por Coronavirus/dietoterapia , Infecções por Coronavirus/mortalidade , Citocinas/sangue , Diabetes Mellitus/imunologia , Humanos , Hospedeiro Imunocomprometido , Neoplasias/imunologia , Pandemias , Pneumonia Viral/dietoterapia , Pneumonia Viral/mortalidade , Insuficiência Renal Crônica/imunologia , SARS-CoV-2 , beta-Glucanas/farmacologia , beta-Glucanas/uso terapêuticoRESUMO
Elicitors play an important role in plant and pathogen interactions. The discovery of new elicitors and their effects on plant defense responses is significant and challenging. In this study, we investigated novel elicitors from Phytophthora palmivora and their effects on plant defenses. A crude elicitor isolated by ethanol precipitation from culture filtrates of P. palmivora induced cell death in tobacco leaves. When tobacco leaves were infiltrated with this cell death-inducing elicitor, the accumulations of H2O2, salicylic acid (SA), scopoletin (Scp), and abscisic acid (ABA) were detected. Accumulations of SA, Scp, and ABA were also induced in rubber tree leaves. P. palmivora infection significantly increased in rubber tree leaves pretreated with the elicitor and cotreated with the elicitor and zoospores of P. palmivora. This elicitor can be described as compound elicitor because Fourier-transform infrared spectroscopy revealed that it consisted of both polysaccharide and protein. We also found that the cell death effect caused by this compound elicitor was completely neutralized by Proteinase K. The compound elicitor was composed of four fractions which were beta-glucan, high-molecular-weight glycoprotein, broad-molecular-weight glycoprotein and 42-kDa protein. Interestingly, the broad-molecular-weight glycoprotein caused the highest level of cell death in tobacco leaves, while the beta-glucan had no effect. The high-molecular-weight glycoprotein, broad-molecular-weight glycoprotein and 42-kDa protein fractions not only caused cell death in tobacco leaves but also induced high levels of SA accumulation. Furthermore, these three fractions clearly promoted P. palmivora infection of rubber tree leaves.
Assuntos
Hevea , Phytophthora , Proteínas de Protozoários , Morte Celular , Hevea/parasitologia , Hevea/fisiologia , Interações Hospedeiro-Parasita , Doenças das Plantas/microbiologia , Folhas de Planta/parasitologia , Proteínas de Protozoários/química , Proteínas de Protozoários/metabolismo , Nicotiana/parasitologiaRESUMO
Invasive fusariosis (IF) usually presents with high fungal burden at diagnosis, and this may contribute to its high mortality rate. The use 1,3-beta-D-glucan (BDG) may help to establish the diagnosis at an earlier disease stage and to monitor treatment. To evaluate the performance of BDG in the diagnosis of IF and its kinetics in relation to the outcome, we retrospectively tested serum samples of 13 cases of IF, analysed the temporal relationship between the first positive BDG test and the date of the diagnosis of IF, and the kinetics of BDG in relation to patients' outcome. We selected 13 controls with similar underlying diseases as cases, at least two serum samples stored, and no invasive fungal disease. Twelve patients with IF had at least one positive BDG (median 4, range 1-16). The test was positive before the diagnosis of IF in 11 of the 12 patients (91.6%), at a median of 10 days (range 1-32). The median BDG value increased (from 109 to 316 pg/mL, P = 0.04) in patients who died by day 30, and did not change significantly (99-101 pg/mL, P = 0.60) in survivors. Using two consecutive BDG tests, sensitivity, specificity, and positive and negative predictive values were 85%, 69%, 7% and 99%, respectively. BDG is positive in the majority of patients with IF, usually before the diagnosis, but the low positive predictive value limits its use to diagnose IF earlier. Once therapy is started, decreasing BDG values suggests treatment response.
Assuntos
Fusariose/diagnóstico , beta-Glucanas/sangue , Adolescente , Adulto , Feminino , Fusariose/patologia , Humanos , Masculino , Pessoa de Meia-Idade , Valor Preditivo dos Testes , Proteoglicanas , Estudos Retrospectivos , Sensibilidade e Especificidade , Análise de Sobrevida , Fatores de Tempo , Adulto JovemRESUMO
Beta-glucans (ßg), that have many useful effects on human health, are natural polysaccharides. Our aim in this study was to determine useful effect of ßg against oxidative and neuronal damage caused by global cerebral ischemia/reperfusion (IR) in stroke imitated mice via surgical operation. A total of 40 mice divided into four equal groups randomly. The group 1 (sham operated) was kept as control. Bilateral carotid arteries of subjects in group 2 (I/R) and group 4 (I/ R + ßg) were clipped for 15 min, and the mice in group 4 (I/R + ßg) were treated with ßg (50 mg/kg/day), while the mice in group 2 (I/R) were treated with only vehicle for 10 days. The mice of group 3 (ßg) were treated with ßg for 10 days without carotid occlusion. Global cerebral I/R significantly increased oxidative stress and decreased members of anti-oxidant defense system. In addition, I/R caused histopathological damage in the brain tissue. However, ßg treatment ameliorated both oxidative and histopathological effects of I/R. Our present study showed that ßg treatment significantly ameliorated oxidative and histological damage in the brain tissue caused by cerebral I/R. Therefore, ßg treatment can be used as supportive care for ischemic stroke patients
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Animais , Camundongos , Estresse Oxidativo/fisiologia , beta-Glucanas/análise , Isquemia Encefálica/induzido quimicamente , Degeneração NeuralRESUMO
Background:Ganoderma lucidum (Leyss. Ex. Fr) Karst is a basidiomycete mushroom that has been used for many years as a food supplement and medicine. In Brazil, National Health Surveillance Agency (ANVISA) classified Ganoderma lucidum as a nutraceutical product. The objective of the present work was to observe the effects of an extract from Ganoderma lucidum in rats treated with streptozotocin, and an agent that induces diabetes. Method: Male Wistar rats were obtained from the animal lodging facilities of both University Nove de Julho (UNINOVE) and Lusiada Universitary Center (UNILUS) with approval from the Ethics Committee for Animal Research. Animals were separated into groups: (1) C: Normoglycemic control water; (2) CE: Normoglycemic control group that received hydroethanolic extract (GWA); (3) DM1 + GWA: Diabetic group that received extract GWA; and (4) DM1: Diabetic group that received water. The treatment was evaluated over a 30-day period. Food and water were weighted, and blood plasma biochemical analysis performed. Results: G. lucidum extract contained beta-glucan, proteins and phenols. Biochemical analysis indicated a decrease of plasma glycemic and lipid levels in DM rats induced with streptozotocin and treated with GWA extract. Histopathological analysis from pancreas of GWA-treated DM animals showed preservation of up to 50% of pancreatic islet total area when compared to the DM control group. In plasma, Kyn was present in diabetic rats, while in treated diabetic rats more Trp was detected. Conclusion: Evaluation from G. lucidum extract in STZ-hyperglycemic rats indicated that the extract possesses hypoglycemic and hypolipidemic activities. Support: Proj. CNPq 474681/201.
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2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) is a widespread environmental contaminant which causes severe toxic effects. Despite there is some suggestion concerning with TCDD induced cardiotoxicity such as formation of free radicals, the main mechanism has not been entirely explained. Beta-glucan is known as strong antioxidant matter and can scavenge free radicals. Therefore this study aimed to investigate the protective effects of beta-glucan against TCDD induced cardiotoxicity in rats. In this study, 2-3 months of age and 190-250 g in weight 32 rats were randomly divided into four equal groups (n=8 for each group). Group 1 was control; Group 2 was TCDD group (2 µg/kg/week); group 3 was the beta-glucan group(50 mg/kg/day), and group 4 was TCDD and beta-glucan treatment group. The heart samples were taken from rats after 21 days treatment. The results were shown that Despite TCDD exposure visibly caused to increase (p ≤ 0.001) in TBARS levels, It caused a visible decline in the levels of GSH, CAT, GSH-Px, and SOD. However Beta glucan significantly increased GSH, CAT, GSH-Px, SOD levels and decreased generation of TBARS. Additionally, our histopathological observations were in agreement with the biochemical results. In conclusion, Beta-glucan treatment exhibited protective activity on TCDD induced cardiotoxicity
Assuntos
Animais , Feminino , Ratos , beta-Glucanas/análise , beta-Glucanas/efeitos adversos , Dibenzodioxinas Policloradas/toxicidade , Cardiotoxicidade/classificaçãoRESUMO
Abstract Beta-glucan (BG) is a conserved cell wall components of bacteria, fungi, and yeast. BG is an immunomodulator and stimulates the host immune system. This study was performed to screen Saccharomyces cerevisiae strain with high BG, extraction of BG using different chemical extraction methods, composition analysis of BG, and evaluation of the immunomodulatory effect of high-quality BG using mice model. Ten yeast strains were screened for high BG content using total glucan extraction kit and were subjected to FT-IR analysis. The kit based extraction revealed that HII31 showed a high content of total glucan and BG. HII31 cells were subjected to four different acid/base extractions, which indicated that combination of a strong base (NaOH) and weak acid (CH3COOH) extraction recovered high BG and a high ratio of polysaccharide, protein, and lipid. Further, the immunomodulatory effect of the selected BG was evaluated using mice, which suggested that low dose of HII31-BG induces the expression of selected pro-inflammatory (IL-17, IFN-γ) and anti-inflammatory cytokine (IL-10) significantly, whereas relatively high dose was required to alter the IL-6 and TGF-β expression. Overall, the present study revealed that BG extracted from HII31 cells alters the expression of studied cytokines, which can be used as a potent immunomodulator in pharmaceutical products.
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BACKGROUND: The mushroom Agaricus blazei has evoked considerable scientific and practical interest in several fields, especially those linked to its medicinal properties. This review aims to summarize and evaluate the past decade findings related to nutritional and therapeutic uses of A. blazei, with especial emphasis on the most recent discoveries regarding its chemical composition and clinical investigations. METHODS: The specialized literature was searched for basic and clinical studies. The main isolated and identified compounds or fractions are described and confronted with their corresponding bioactivities. RESULTS: Basic research of high quality using ex vivo and in vivo conditions are quite abundant in the specialized literature, but ony 17 clinical studies and two case reports were found. A great number of active molecules have been identified, and they can be divided into three categories, (1) hydrophilic small molecules (e.g., phenolics), (2) lipophilic or partially lipophilic small molecules (e.g., agarol) (3) and macromolecules (e.g., ß-glucans). At least the following bioactivities can be considered as being supported by experimental evidence: antioxidant activity (in aging or disease), immunomodulation and cell signaling, anti-inflammatory activity, antiparasitic actions, antimicrobial activity, anticancer effects and tumor growth inhibiting effects, antimutagenic activity, hepatoprotection against chemical or viral infection and antidiabetic activity. CONCLUSION: The amount and quality of the evidence that has been accumulating during the last decade strongly speaks in favor of the health benefits of the ingestion of A.blazei or derived products. However, there are many uncertainties and limitations when attempts are made to extrapolate or to demonstrate their biological effects in the human organism in health or disease. Clearly, more clinical trials, using reliable statistical methods and standardized preparations are needed to establish the efficacy of A. blazei as a therapeutic agent.