Conclusions: We demonstrated that rifaximin, neither disrupts the overall biostructure
of the human microbiota nor exerts any cytotoxic or genotoxic activities, but it does provoke changes in bacterial metabolism and bifidobacterial numbers that support a functional advantage to the host.
Rodent studies have provided compelling insights; however, they have countless shortcomings as a reflection
of human microbiota, human dietary patterns, and the ultimate intertwining of these variables with complex mental health disorders.
The NIH Common Fund Human Microbiome Project (HMP) was established with the mission of generating research resources enabling comprehensive characterization
of the human microbiota and analysis of their role in human health and disease.
Add to this the unprecedented alteration
of the human microbiota and you have a perfect storm of criteria that have contributed to striking increases in celiac disease and gluten sensitivity.
Plentiful opportunities for researchers to learn about and discuss important developments in the field
of human microbiota, the collection of microbes living in and on our body that have a significant impact on human health and well - being.
New deep sequencing methods provide a convenient platform for characterizing the composition
of the human microbiota [4, 7, 8, 13, 15 — 19].
The age - related successional mechanisms involved in the differentiation
of the human microbiota across body habitats are only beginning to be understood (6), and defining the pioneer colonizers is a first step toward elucidating the initial stages of microbiota development.
Not exact matches
How do the microbes within cheese interact with the natural
microbiota of the
human gut and can cheese be used to assist in maintaining a healthy gut
microbiota?
Using a «gnotobiotic mouse model» — where mice were «colonized with a synthetic
human gut
microbiota composed
of fully sequenced commensal bacteria» — Desai et al reported on the effects
of different diets with different fibre content.
The species composition
of the
human intestinal
microbiota differs between particle - associated and liquid phase communities.
The
human microbiome is the composite
of genes
of the microorganisms (
microbiota) living in and on the
human body that influence the health and development
of the host (1).
The intestinal
microbiota represents the greatest
human microbial exposure, and the acquisition
of early intestinal
microbiota is the neonate's first major microbial challenge.
Her main research areas are Perinatal and
human milk
microbiota and Characterization
of probiotic bacteria and study
of their use in bacterial dysbiosis.
In collaboration with Synchrotron Oxford, the University
of East Anglia and the University
of California, the researchers, using a commonly - found member
of human gut
microbiota called Ruminococcus gnavus as a model organism identified carbohydrate binding modules with the ability to bind to mucus.
Over 100 different oligosaccharides have been identified in the
human colon, and recent research has shown that variations in the oligosaccharides within the mucus are associated with variations in the composition
of the gut
microbiota.
The researchers found that changes in the amount
of protein and carbohydrates in the diet had a similar effect on the
microbiota of dogs and
humans, independent
of the dog's breed or sex.
Dr Luis Pedro Coelho, commented: «These findings suggest that dogs could be a better model for nutrition studies than pigs or mice and we could potentially use data from dogs to study the impact
of diet on gut
microbiota in
humans, and
humans could be a good model to study the nutrition
of dogs.
The Wyss team believes the ability
of the
human gut - on - a-chip to culture the microbiome with
human gut cells also holds promise for the field
of precision medicine, where a patient's own cells and gut
microbiota could one day be cultured inside a gut - on - a-chip for testing different therapies and identifying an individualized treatment strategy.
The new
microbiota may trigger weight loss, says gastroenterologist Lee Kaplan
of Massachusetts General Hospital, by sending chemical signals that cause the
human host to burn more calories, which helps use up the body's fat reserves.
As noted by Dr. Vicki Ellingrod — the Chair
of this session, «Current state -
of - the - art research in both animal models as well as
humans point to the link between the gut
microbiota and mood and anxiety models, as well as the potential for psychiatric medications to directly affect the gut microbiome.»
«Healthy gut bacterial communities are known to benefit immune regulation, metabolism and potentially even the nervous system, so if cholera or other diarrheal diseases permanently impact the
microbiota, there could be long - term effects on
human health,» explains Regina LaRocque, MD, MPH,
of the Massachusetts General Hospital (MGH) Division
of Infectious Diseases, co-senior author
of the paper.
Kristen Earle, Gabriel Billings, KC Huang and Justin Sonnenburg,
of Stanford University's School
of Medicine, Department
of Microbiology and Immunology, took second place with this photo
of a mouse colon colonized with
human microbiota, seen at 63x.
Regulatory issues must be addressed before moving to
human studies, Davies said, but the findings published in the August issue
of the Journal
of Clinical Investigation suggest that it may be possible to manipulate the bacterial residents
of the gut — the gut
microbiota — to treat obesity and other chronic diseases.
Changes in the composition
of the gut
microbiota are seen in many
human diseases such IBD, a chronic, lifelong inflammatory disorder that includes Crohn's disease and ulcerative colitis.
Like plants in a garden, the diverse populations
of microbes that normally line the intestinal tract, called the
microbiota, are essential to
human health.
Rather, it conveys the subtle and elegant choreography
of one part
of the
human microbiome: The relationships between the mothers» genetics, the composition
of her breast milk and the development
of her infant's gut
microbiota.
The importance
of the intestinal
microbiota for
human health has just recently been unfolded.
Trillions
of bacteria exist within the
human intestinal
microbiota, which plays a critical role in the development and progression
of IBD.
In addition, cohousing coprophagic mice harboring transplanted
microbiota from discordant pairs provides an opportunity to determine which bacterial taxa invade the gut communities
of cage mates, how invasion correlates with host phenotypes, and how invasion and microbial niche are affected by
human diets.
The goal
of the study was to explore whether fecal
microbiota from
human IBS patients with diarrhea has the ability to influence gut and brain function in recipient mice.
«It's increasingly clear that our gut bacteria, or
microbiota, can communicate with the
human brain,» said Kathy Magnusson, a professor in the OSU College
of Veterinary Medicine and principal investigator with the Linus Pauling Institute.
The
human GI tract is colonized by billions
of bacteria and other microorganisms, belonging to hundreds
of species that are collectively termed «
microbiota.»
The work «represents a significant step in understanding
human microbiota coevolutionary history,» says Justin Sonnenburg
of Stanford University in Palo Alto, California, who was not involved with the research.
A deep global analysis
of the gut
microbiota composition was done by phylogenetic microarray analysis using a
Human Intestinal Tract Chip (HITChip), an analytical device designed specifically for studying gut bacteria.
Fu notes that the
human body and its
microbiota have evolved to live in harmony over millions
of years.
«Previous studies in mice have indicated that bacteria that are able to encroach upon the epithelium might be able to promote inflammation that drives metabolic diseases, and now we've shown that this is also a feature
of metabolic disease in
humans, specifically type 2 diabetics who are exhibiting
microbiota encroachment.»
Given that the investigators have previously shown the influence
of the host molecular clock on the gut
microbiota, they will also ask if taking this NSAID at different times
of day might lead to higher efficacy and less side effects in animal models and eventually in
humans.
Although the fucose findings are still preliminary, unlocking the role
of this sugar in competitions between gut
microbiota and pathogens could theoretically give rise to new therapies for treating
human illness.
In order to find out which bacterial species may be present in the air and on the surfaces inside spacecraft and how the composition
of the
microbiota may change during
human habitation, a crew
of six male «Marsonauts» lived inside a mock - up spacecraft, located in Moscow, from 3rd June 2010 to 5th November 2011.
While a core
microbiota of the same bacteria was present in all areas
of the mock - up spacecraft, the authors noticed specific bacterial signatures for each individual area, or module, indicating that — much like in other indoor environments — microbial presence is associated with
human presence as well as the type
of activity that an area is used for.
There is increasing awareness that the intestinal
microbiota, the vast, diverse population
of microorganisms that inhabits the
human intestines, play a role in driving colorectal cancer.
The team
of researchers from Germany, UK and Austria, led by the German Aerospace Center (DLR), found that apart from the crew who were the main source
of human - associated bacteria inside the habitat, confinement appeared to be the strongest trigger shaping the bacterial community — the
microbiota — which remained highly dynamic over time.
Heiman and Greenway describe how the reduction in dietary diversity has changed the richness
of human gut
microbiota, the community
of microorganisms living in the gut.
«Reduction in dietary diversity impacts richness
of human gut
microbiota: Dietary diversity necessary for a healthy gastrointestinal microbiome.»
The intestinal
microbiota of healthy
humans progressively develops in complexity from birth until adulthood, where a stable microbiome is established for the majority
of an individual's adult life (Arumugam et al., 2011; Jalanka - Tuovinen et al., 2011; Durbán et al., 2012).
The findings illuminate the specialized roles played by key members
of the vast microbial community living in the
human gut, and could inform the development
of tailored
microbiota transplants to improve intestinal health after antibiotic use or illness.
Mammals —
humans included — depend on their
microbiota, the collection
of microorganisms they host in and on their bodies.
The IMI could also control and organize access to metadata (the associated host disease phenotype data, for a
human gut
microbiota sample, for instance) without which meaningful interpretation
of the data is not possible.
Investigating mouse models for biological for research The congress aims to promote the International Mouse Phenotyping Consortium (IMPC) mouse lines, importance
of mouse phenotyping & clinical and drug discovery collaboration, to present progresses performed by IMPC with regards CRISPR editing genome, rare diseases,
microbiota and ageing pipeline, as well as illustration
of examples
of scientific projects about «Animal models for
human diseases» and recent developments in mouse models phenotyping imaging.
BIOASTER conducts innovative collaborative research, with and for public and private partners in the four major application fields
of microbiology including
human and veterinary infectious diseases: vaccines, antimicrobials, diagnosis and
microbiota.