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Figure 6. Gastrointestinal endocrine cells may exert their effects via three modes of action: 1, By entering the circulating blood and reaching distant targets (endocrine mode); 2, by acting locally on nearby structures (paracrine mode); or 3, via synaptic activity. ... The check details recent findings of gastrointestinal endocrine cells exhibiting endocrine and neuron-like characteristics support and revive the old hypothesis on the evolution of the neuroendocrine system of the gut (76). The observation that the mammalian gastrointestinal hormonal peptides occur in the CNS, but not in the gut of invertebrates (77�C79), led to the hypothesis that the gastrointestinal endocrine cells of vertebrates originated in the nervous system of a common ancestor, and migrated during a later stage of evolution into the gut as scattered endocrine cells (76). 3.?Interaction between diet and gastrointestinal cells As aforementioned, the composition of the diet with different proportions of carbohydrates, proteins and fats is a trigger for the release of different gut hormones into the lamina propria. Furthermore, the ingested foodstuffs act as prebiotics for the intestinal microbiota, and the byproducts of the bacteria trigger also the release of hormones from the gut endocrine cells. It has been shown recently that a change in diet is accompanied by a change in the density of gastrointestinal cells (3�C6). This could be due to an ingested foodstuff acting as a prebiotic Ceramidase for the intestinal bacteria with the associated bacterial byproducts. These bacterial byproducts may act on the stem cells and/or differentiation progenitors, resulting in changes in the stem cell clonogenic activity and/or differentiation progeny. Alternatively, these bacterial byproducts could act on mature gastrointestinal cells to favor the expression of specific hormones (Fig. 7). Thus, the change in the density of a certain endocrine cell type could be caused by switching to the expression of a different hormone. Figure 7. Schematic illustration of the possible ways by which a change in diet could affect the density of gastrointestinal cells. 4.?Conclusion The diet is important for regulating the functions of gastrointestinal endocrine cells. It not only regulates the release of hormones from these cells, Anticancer Compound Library supplier but also affects their densities. The interaction between nutrients and gastrointestinal endocrine cells could be useful for the clinical management of several diseases, such as irritable bowel syndrome, obesity and diabetes (17,80�C85).""Pain is a frequent symptom among cancer patients, with 30% of patients experiencing pain at the time of diagnosis and
