Microbiota intestinal y la dieta en el tratamiento de la enfermedad inflamatoria intestinal / Intestinal microbiota and diet in the treatment of inflammatory bowel disease

RESUMEN Fundamento: La enfermedad inflamatoria intestinal comprende la colitis ulcerativa idiopática y la enfermedad de Crohn. En la patogenia intervienen factores genéticos y ambientales como la alteración de las bacterias luminales y el aumento de la permeabilidad intestinal, factores que alteran la inmunidad intestinal, causas estas de lesión gastrointestinal. Objetivo: Analizar la influencia de la dieta en la microbiota intestinal en la enfermedad inflamatoria intestinal, así como concientizar a los profesionales de la salud en la importancia de la terapia a partir de la dieta, como pilar esencial en el control de esta enfermedad digestiva crónica. Metodología: Se realizó una búsqueda en bases de datos como: Scielo, Pubmed/Medline, Ebsco, Clinical Key, Springer, Web of Science, Infomed, se incluyeron revistas, libros, repositorios de tesis, sitios web de especialidades. Desarrollo: En los pacientes con enfermedad inflamatoria intestinal existe una disbiosis que contribuye potencialmente a una respuesta inmune proinflamatoria. Conclusiones: El equilibrio entre el huésped y su microbiota intestinal es esencial para el desarrollo inmunológico óptimo; la modificación de la dieta y la flora bacteriana intestinal son dianas potenciales en el tratamiento y prevención de la misma.

ABSTRACT Background: Inflammatory bowel disease includes idiopathic ulcerative colitis and Crohn's disease. In the pathogenesis are present genetic and environmental factors such as alteration of luminal bacteria and increased intestinal permeability, factors that alter the intestinal immunity, these causes of gastrointestinal injury. Objective: To analyze the influence of diet on intestinal microbiota in inflammatory bowel disease, as well as to increase awareness among health professionals about the importance of diet-based therapy as an essential pillar in the control of this chronic digestive disease. Methodology: A search was made in databases such as: Scielo, Pubmed / Medline, Ebsco, Clinical Key, Springer, Web of Science, Infomed, magazines, books, thesis repositories, and specialty websites. Development: In patients with inflammatory bowel disease there is a dysbiosis that potentially contributes to a proinflammatory immune response. Conclusions: The balance between the host and its intestinal microbiota is essential for the optimal immunological development; the modification of the diet and the intestinal bacterial flora are potential targets in the treatment and prevention of it.

Role and Therapeutic Prospect of Intestinal Microecology in Crohn’s Disease / 胃肠病学

The etiology and pathogenesis of Crohn’s disease(CD)are not fully clear,and genetic susceptibility, immunologic disorder,intestinal barrier dysfunction and intestinal microecology are considered to be involved in the pathogenic mechanism of CD. In recent years,the relationship between intestinal microecology and CD has received much attention. Several studies confirmed that the intestinal microecology in CD patients was different from that in normal person. The change of intestinal microecology was correlated with the occurrence of CD,and modulation of intestinal flora was effective in the treatment of CD. This article reviewed the relationship between intestinal microecology and CD and the therapeutic prospect of intestinal microecology for the treatment of CD.

Intestinal Bacterial Flora that Compete on the Haem Precursor Iron Fumarate in Iron Deficiency Anemia Cases

Aims: The study focused on finding if there is any possible relation between the intestinal bacterial population quantitative and qualitative and the deficiency of the most important iron compounds as haem precursors. Methodology and Results: Blood complete picture and stool analyses were done to 750 volunteer cases whom were asked for these analyses by their physicians. Analyses proved that 560 cases representing 75.2 % were anemic as the RBC(s) based on counts of the total studied cases of less than 263 x 104 and the haemoglobin amount ranged between 7.2 and 11.3 g/dl, while the remainder 24.8 % of the volunteer sample was not anemic. A high male/female ratio of anemic cases, 1:27 was also documented. Considering that all the studied stool samples should be completely free from any parasites or any other anemia-related diseases was a priority. Bacteriological analysis of stool samples of the anemic cases resulted in the detection of high counts of total viable bacteria, exceeded 42 x 109 cfu/g, while it was never more than 26 x 106 cfu/g and decreased to 4 x 106 cfu/g in many cases in this study. Identifying of the 361 bacterial isolates, were found to belong to 12 genera and 19 species, 6 of them; Pseudomonas putrefaciens, Micrococcus luteus, Erysipelothrix rhusiopathiae, Bacillus megaterium, Bacillus pumilus and Bacillus coagulans , were found and in high counts in the stool samples of only anemic cases. The ability of these isolates to compete for iron compounds such as ferrous fumarate alone or with glucose and phytate as activators or inhibitors to these abilities was investigated. Results proved 11 species out of the 19 identified species are capable to use and compete on ferrous fumarate as a haem precursor. Sensitivity test for the representatives of the 19 species and 6 of the most commonly used antibiotics in the Egyptian pharmacy, using standard disc method, revealed variable susceptibilities of almost all of them to more than one of the studied antibiotics, except Corynebacterium equatium, which was found very resistant to two antibiotics; colistin sulfate and erythrocin. Conclusion, significance and impact of study: The study finally concluded the strong role of intestinal bacterial counts and types as competitors on the haem precursor iron-containing compounds like ferrous fumarate.