scholarly journals Effect of a protein-free diet in the development of food allergy and oral tolerance in BALB/c mice

2015 ◽  
Vol 113 (6) ◽  
pp. 935-943 ◽  
Author(s):  
Josiely Paula-Silva ◽  
Andrezza Fernanda Santiago ◽  
Rafael Pires Oliveira ◽  
Magda Luciana Paula Rosa ◽  
Claudia Rocha Carvalho ◽  
...  

The aim of the present study was to investigate the effect of a protein-free diet in the induction of food allergy and oral tolerance in BALB/c mice. The experimental model used was mice that were fed, since weaning up to adulthood, a balanced diet in which all dietary proteins were replaced by amino acid diet (Aa). The absence of dietary proteins did not prevent the development of food allergy to ovalbumin (OVA) in these mice. However, Aa-fed mice produced lower levels of IgE, secretory IgA and cytokines. In addition, when compared with mice from control group, Aa-fed mice had a milder aversive reaction to the allergen measured by consumption of OVA-containing solution and weight loss during food allergy development. In addition, mice that did not have dietary proteins in their diets were less susceptible to induction of oral tolerance. One single oral administration was not enough to suppress specific serum Ig and IgG1 levels in the Aa-fed group, although it was efficient to induce suppression in the control group. The present results indicate that the stimulation by dietary proteins alters both inflammatory reactivity and regulatory immune reactivity in mice probably due to their effect in the maturation of the immune system.

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Jianguo Liu ◽  
Liehui Xiao ◽  
Hezhongrong Nie ◽  
Yong Pan ◽  
Yan Liu ◽  
...  

Abstract Objective To investigate the impact of microecological preparation combined with modified low-carbon diet on the glucolipid metabolism and cardiovascular complication in obese patients. Methods From August 2017 to July 2020, 66 obese patients were recruited, and administrated with an modified low-carbon diet with (group A) or without (Group B) microecology preparation and a balanced diet in control group (group C) for 6 months. Meanwhile, 20 volunteers administrated with a balanced diet were recruited as the healthy control group (group D). Results After 6-month intervention, obese subjects in group A and B showed significant improvement of body and liver fat mass, reduction of serum lipid levels, intestinal barrier function markers, insulin resistance index (IRI), high blood pressure (HBP) and carotid intima thickness, as compared with subjects in group C. More importantly, subjects in group A had better improvement of vascular endothelial elasticity and intimal thickness than subjects in group B. However, these intervention had no effect on carotid atherosclerotic plaque. Conclusion Administration of microecological preparation combined with modified low-carbon diet had better improvement of intestinal barrier function, glucose and lipid metabolism, and cardiovascular complications than low-carbon diet in obese patients, but the effect of a simple low-carb diet on carotid atherosclerotic plaque need to be further addressed.


2018 ◽  
Author(s):  
Guadalupe Martínez ◽  
Susana N. Diéguez ◽  
María B. Fernández Paggi ◽  
María B. Riccio ◽  
Denisa S. Pérez Gaudio ◽  
...  

AbstractIntestinal health of weaning piglets was studied after oral treatments with fosfomycin (FOS),Cynara scolymusextract (CSE), deoxynivalenol (DON) and their combinations. Piglets were divided in groups and received different treatments during 15 days, namely DON (1mg/kg of feed), FOS administered into the drinking water (30 mg/kg b.w.), CSE (300 g/ton of feed) and all possible combinations including a control group that received clean balanced diet. At day 15, three piglets from each group were euthanized and gastrointestinal tract samples were immediately taken to evaluate pH, bacteriology (enterobacteria and lactic acid bacteria), volatile fatty acids concentration (VFAs), disaccharidases activity (lactase, sucrase and maltase), histology (intestinal absorptive area [IAA] and goblet cells count) and adherence of bacteria to intestinal mucus. Animals receiving FOS and CSE treatments exhibited evident beneficial intestinal effects compared to animals receiving diets free from these compounds. This was revealed by a lower enterobacteria population together with a lower E/L, an enhanced production of butyric acid, an increased enzymatic activity (particularly maltase), and a greater IAA and goblet cells count along with an increase in pathogenic bacteria adherence to intestinal mucus. Interactions between both treatments resulted in similar beneficial effects as their individual administration. On the contrary, DON produced detrimental effects on intestinal health as a decrease was observed on volatile fatty acids production, enzymatic activity and goblet cells count in animals receiving diets containing sub- toxic concentrations of this mycotoxin. The knowledge of the intestinal effects of these compounds contributes to understand the physiological and pathological gut changes and their potential productive consequences.


Author(s):  
T.V. Zolotova ◽  
◽  
A.G. Volkov ◽  
P.A. Kondrashov ◽  
◽  
...  

Paratonsillitis is one of the most common purulent inflammatory diseases, considered as a manifestation of chronic tonsillitis. The aim of the work is to study the state of local immunity by the level of immunoglobulin A in saliva in patients with paratonsillitis and its changes in the treatment process, to determine the level of antistreptolysin-O in serum, as well as to study the etiological factors of paratonsillites in the microbiological assessment of the species composition of flora in smears from the cavity of paratonsillar abscess. Under our observation there were 152: 32 healthy people and 120 patients with paratonsillitis under abecedarian or abscess stage. It was found that in patients with paratonsillitis there is a significant (p<0.001) decrease in the level of secretory immunoglobulin A in saliva, which indicates a violation of local immunity and requires correction. The level of antibodies to streptolysin-O in the serum of patients with paratonsillitis was significantly - 10.25 times higher than in healthy individuals in the control group, which confirms the high streptococcal antigenic load. The results of microbiological examination of smears from the abscess cavity indicated the release of the most frequent pathogens of paratonsillites - Streptococcus β-haemolythicus, Streptococcus Pneumoniae and Staphylococcus Aureus, with bacterial associations prevailing (63.5%). After a course of antimicrobial therapy, supplemented with immunomodulatory agents in the form of bacterial lysates, there was an increase in the level of secretory IgA in saliva in 10-30 days in 3.3-4.5 times. At the same time, the level of antistreptolysin-O significantly decreased. In patients receiving immunomodulatory therapy in the form of bacterial lysates in the complex treatment of paratonsillitis, for the period of observation of 6 months, there was a decrease in the frequency of relapses of the disease by 2 times.


2019 ◽  
Vol 5 (1) ◽  
pp. 31-36
Author(s):  
Jay Jha ◽  
Varun Malhotra ◽  
Om Jha ◽  
Shivani Gupta

Introduction Alterations in the lipid metabolism have been reported in the subject of diabetes mellitus. They may be influenced by the presence of hypertension. Aims The present study was undertaken to estimate the serum lipids profiles of diabetics with and without hypertension. Study design The study design is experimental with comparative study method, Methodology The sample size taken is 80 which is divided into four groups as A group of 20 healthy individuals of age 20-70 years, other B group of 20 diabetic patients without Hypertension, other C group of 20 hypertensive patients without diabetes and the rest 20 diabetic patients along with hypertension of age 20-70 years of D group. They were matched with respect to various lipid parameters such as total cholesterol, Triglycerides, lipoprotein ratio etc. with control group A. Place and duration of study: the study took place at Santosh group of institutions between August 2013 to August 2016. Result The serum cholesterol levels were significantly higher in hypertensives without diabetics and in diabetics with hypertension as compared to normal controls. No significant difference in the serum triglyceride level was observed among various groups in this study. The ?: ? lipoprotein ratio was found to be affected in all the groups as compared to controls with maximum ratio in diabetics without hypertension and in hypertension without diabetes. Patients who were suffering from diabetes and hypertension were at a maximum risk of developing atherosclerosisand its complications such as coronary artery disease. Diabetics with hypertension had significant higher levels of cholesterol as compared to that of without hypertension. The diabetics with hypertension had lipid abnormalities because of diabetic element in them rather than the hypertension. All the groups studied except the controls were found to be increasingly susceptible to the risk of atherosclerosis and its complications. This risk was found to be maximum in diabetics with hypertension rather than diabetics or hypertensive’s alone. Conclusion The need for right balanced diet, regular exercise and a stress free life is essential for prevention and management of diabetes and hypertension. 


Nutrients ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 2450
Author(s):  
Encarnación Soriano-Ayala ◽  
Alberto Amutio ◽  
Clemente Franco ◽  
Israel Mañas

The present study explored the effects of a second-generation mindfulness-based intervention known as flow meditation (Meditación-Fluir) in the improvement of healthy life behaviors. A sample of university students (n = 51) in Spain were randomly assigned to a seven-week mindfulness treatment or a waiting list control group. Results showed that compared to the control group, individuals in the mindfulness group demonstrated significant improvements across all outcome measures including healthy eating habits (balanced diet, intake rate, snacking between meals, decrease in consumption by negative emotional states, increased consumption by negative emotional states, amount of consumption, meal times, consumption of low-fat products), tobacco, alcohol, and cannabis consumption, and resting habits. There were differences between males and females in some of these variables and a better effect of the treatment was evident in the females of the experimental group when compared to the males. The flow meditation program shows promise for fostering a healthy lifestyle, thus decreasing behaviors related to maladaptive eating, tobacco, alcohol, and cannabis consumption as well as negative rest habits in university students. This mindfulness program could significantly contribute to the treatment of eating disorders and addictions, wherein negative emotional states and impulsivity are central features of the condition.


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