Gastrointestinal Environment Effects
Gastrointestinal Environment Effects - Related Videos
08:15
Gastrointestinal Motility Monitor (GIMM)
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Cited by 36 •
2010
Evaluation of colonic motility in the guinea pig distal colon with the Gastrointestinal Motility Monitor (GIMM) is a straightforward and simple to learn approach to quantitatively evaluate propulsive motility in the gastrointestinal tract.
09:09
Protocol for Assessing the Relative Effects of Environment and Genetics on Antler and Body Growth for a Long-lived Cervid
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Cited by 2 •
2017
Phenotypic differences among cervid populations may be related to population-level genetics or nutrition; discerning which is difficult in the wild. This protocol describes how we designed a controlled study where nutritional variation was eliminated. We found that phenotypic variation of male white-tailed deer was more limited by nutrition than genetics.
11:07
Creating Defined Gaseous Environments to Study the Effects of Hypoxia on C. elegans
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Cited by 19 •
2012
This paper details how to use continuous-flow hypoxia chambers to generate atmospheres with defined concentrations of O2 to understand biological responses to decreased O2. This system is easy to setup and maintain, and flexible enough to suit a wide range of O2 concentrations and model...
03:48
Effects of Desmodium caudatum on Gastrointestinal Hormones and Intestinal Flora in Rats with Gastritis
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Cited by 1 •
2024
The present protocol describes the method for analyzing intestinal flora using Illumina-based 16S rRNA gene sequencing and provides a framework for evaluating the effectiveness of herbal decoctions.
06:02
Isolation of CD 90+ Fibroblast/Myofibroblasts from Human Frozen Gastrointestinal Specimens
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Cited by 17 •
2016
Here, a protocol to isolate and establish primary fibroblast/myofibroblast (MF) cultures from frozen gastric, small intestinal, and colonic tissue-yielding cells with a MF phenotype-is presented. These cells express CD90, α-SMA and vimentin. MFs can be used for a variety of functional assays including enzymatic activity and cytokine production.
FAQs
Gastrointestinal pH can change whether a substance dissolves efficiently or undergoes chemical degradation before absorption. These effects influence the amount available for intestinal uptake and may therefore alter systemic exposure. Comparing behavior across differing gastrointestinal conditions helps researchers evaluate whether a formulation and dose are likely to produce consistent treatment effects.
Digestive enzymes can transform susceptible ingested substances, while bile salts contribute to the intestinal environment in which dissolution and absorption occur. Their combined effects may change the chemical form or availability of nutrients and medicines. Accounting for these processes is important when interpreting why the same oral treatment may produce different exposure levels.
Fluid volume affects the environment available for dissolution, whereas intestinal motility influences how quickly contents move through the digestive tract. Together, these factors can change the time available for dissolution, degradation, and absorption. Variation in transit conditions may therefore contribute to differences in oral bioavailability and treatment response.
Resident microbiota can participate in the metabolism of substances within the gastrointestinal tract, potentially changing their chemical forms and biological activity. This microbial contribution adds a source of variability beyond human digestive processes. Clinical research examines microbiome-related metabolism to help interpret differences in exposure and to understand how gastrointestinal conditions may influence therapeutic outcomes.
Researchers consider changes in pH, enzymes, bile salts, fluid volume, motility, and microbiota when assessing an oral formulation. They use this physiological context to anticipate dissolution, degradation, permeability, transit, and resulting bioavailability under differing conditions. The findings can guide formulation optimization and dosing decisions aimed at maintaining effective exposure.
Gastrointestinal disease or interacting influences can modify the conditions that control dissolution, transformation, permeability, and transit. Such changes may help explain why a medicine performs differently among patients or situations. Incorporating gastrointestinal context into clinical studies supports more careful interpretation of treatment variability and informs therapies intended to remain effective across physiological conditions.