View clinical trials related to Prebiotics.
Filter by:The investigators aim was to compare healthy young adults, senior orienteers (model of healthy ageing) and elderly with gastrointestinal symptoms on intestinal permeability, microbiota compositions and well-being. In addition, assess whether 3 weeks of oral intake of soluble or dispersible forms yeast-dervied beta-glucan could improve intestinal barrier function against drug-induced barrier disruption vs placebo for a cohort of elderly people with gastrointestinal symptoms, in a randomized double blinded placebo-controlled cross-over clinical trial.
The investigators propose a comprehensive, multiomic study that will integrate longitudinal data associating changes in specific gut bacteria and host in response to prebiotic fiber supplementation. These data will guide the development of an integrative biological signature relating bacterial-derived metabolites with biological outcome in the host.
This study aim to investigate the roles of the test article in improving gastrointestinal functions and gut microbiota of humans. A total 40 healthy adults were recruited and randomly divided into experimental and control groups, with 20 subjects each, for a 4-week trial. The subjects took the test article, "Super 13 Pro & Prebiotics" or the control article, "The placebo without Super 13 Pro & Prebiotics" during the 4-week drug-intake period. Fecal specimens were collected at the 0th, 2nd, and 4th weeks of the trial for analyzing the bacterial counts of Bifidobacterium spp., Clostridium perfringens, Lactobacillus spp., and Coliform.
The investigators aim was to assess whether 6 weeks of oral intake of the wheat-derived prebiotic fiber arabinoxylan or oat-derived beta-glucan could improve intestinal barrier function against drug-induced barrier disruption in a general population of elderly people, in a randomized double blinded placebo-controlled clinical trial.
This is an exploratory cluster randomized controlled trial to evaluate the effect of a kefir beverage, enriched with prebiotics components, on immunity, lipid profile and adiposity in a population-based study, using the family as the intervention unit.
Honey is a natural product that contains multiple nutrients; it is composed of fructose, glucose and fructooligosaccharides that can potentially serve prebiotic functions. It also contains more than 180 substances including amino acids, vitamins, minerals and enzymes. Investigators hypothesized that supplementation of enteral feeds with honey would produce a bifidogenic effect and stimulate the immune response in preterm infants. Investigators randomly assigned subjects to 4 groups receiving 0, 5, 10 and 15 grams of honey daily for 2 weeks and measured their effect on stool colonization, systemic immune parameters and anthropometric measurements.
Iron deficiency and anemia are health issues affecting mainly infants and women in developing countries. Iron deficiency in infancy can have long-lasting impact on cognitive and motor development of the child. Iron fortification has shown to be effective against anemia. However, in areas with a high burden of infectious diseases iron may increase the risk of unfavorable gut microbiota composition possibly influencing diarrhea prevalence. Therefore we want to assess the effects of home fortification of complementary food with two iron-containing micronutrient powders (MNPs) with and without the addition of a prebiotic (7.5 g of galactooligosaccharides as GOS-75) compared to a control on the composition of the gut microbiota of Kenyan infants. In addition, iron deficiency may iimpair adaptive immunity. Following Kenyan Minstry of Health guidelines, infants receive their first measles vaccine at 9 months. In this study we will use an MNP with a moderate iron dose of 5 mg, with 2.5 mg of Fe as NaFeEDTA and 2.5 mg of Fe as ferrous fumarate (+Fe). There will be 3 study groups MNP, MNP+Fe and MNP+Fe+GOS. The infants will be enrolled in the study at the age of 6-10 months and will consume a home-fortified maize porridge for four months. At baseline and endpoint (after 4 months of intervention), we will collect blood samples of the infants in order to assess anemia, iron status, and inflammation. In addition, we will assess the effect of iron supplementation on measles vaccine response. Fecal samples (from child and mother) will be collected at baseline, 3 weeks and at endpoint in order to evaluate the changes in gut microbiota and gut inflammation. During the intervention, in a sub-group of children who receive broad-spectrum antibiotics, we will compare how the three different interventions modify the effect of antibiotics on the infant gut microbiota. We will opportunistically select children that are enrolled in the study and who become ill, and who are prescribed antibiotics by the local health care team, according to the local standard of care in the study area. Five additional stool samples from these children will be collected (day 0 (before the first antibiotic dose), 5, 10, 20 and 40) to evaluate the changes in the gut microbiota and gut inflammation. Three years after the study end, we would like to collect a blood and stool sample from the children and examine the iron status and gut microbiome respectively.
Abdominal and pelvic radiotherapy (RT) reduces the renewal capacity of the epithelium. Rectal biopsies obtained from patients receiving pelvic RT have revealed atrophy of surface epithelium, acute cryptitis, crypt abscesses, crypt distortion and atrophy, and stromal inflammation. Modifications in intestinal microbiota, such as an increase in the number of pathogens, may contribute to intestinal injury. The prebiotic effect of a carbohydrate is assessed by its capacity to stimulate the proliferation of healthy bacteria (Bifidobacterium, Lactobacillus) rather than pathogenic bacteria (Clostridium, E. coli). The hypothesis of the study is that a mixture of inulin and fructooligosaccharide could modulate Lactobacillus and Bifidobacterium and reduce the intestinal injury in patients affected of gynaecological cancer and treated with abdominal radiotherapy.
It has recently been discovered that bacteria are able to communicate using specialised molecules known as Quorum Sensing Signalling Molecules (QSSMs). An accumulation of QSSMs in their surrounding environment allow for the bacteria to quantify the size of colonies. At specific colony sizes the concentration of QSSMs reaches a critical threshold leading to the activation of genes that cause an infection. It is by this mechanism that bacteria within a colony coordinate behaviour to activate infectivity when colony sizes are large enough to withstand defensive measures from the host's immune system. A disruption of quorum sensing may reduce the severity of infection and this has led to the development of inhibitors of quorum sensing as a new strategy in antibacterial therapy. QSSMs are also thought to facilitate infection by other mechanisms and are able to influence the number and function of a specific type of immune cell known as an 'antigen presenting cell'. These cells are pivotal in allowing the immune system to recognise components of bacteria as foreign and thereby mount the appropriate response. It was found that large numbers of these types of cells underwent programmed cell death (cell suicide) in the presence of QSSMs compared to when QSSMs were absent. This mirrors the situation in blood sampled from patients with severe infections where there is a greater proportion of cell deaths among antigen presenting cells than other types of immune cell. This study aims to establish in healthy volunteers, the mechanisms by which QSSMs affect immune cells and facilitate the spread of infection. Antibiotic administration in humans can alter the environment of the intestine and can lead to an overgrowth of harmful bacteria to potentially cause an infection. Probiotics supplements can prevent bacterial overgrowth and potentially reduce infective complications. The mechanism, which we aim to clarify, may involve changes in both the production of QSSMs and the function of immune cells. Hypothesis 1. Antibiotic use alters gut flora, leading to the appearance in the systemic circulation of bacterial QSSMs and changes in immune function of the host. 2. Probiotics and/or prebiotics have beneficial effects by preserving the normal resident gut flora, thereby, modulating bacterial QSSMs and preserving the immune function of the host. Aims The aims of our study are 2 fold: 1. Firstly, to study the effect of orally administered antibiotic on QSSMs (in faeces and blood) and on innate and adaptive immunity in healthy humans. 2. Secondly, to study the effect of orally administered combinations of prebiotic, probiotic and antibiotic on QSSMs (in faeces and blood) and on innate and adaptive immunity in healthy humans.