Irritable bowel syndrome (IBS) is the most common functional bowel disease, and diarrhea-predominant IBS(IBS-D) is the most common type of IBS in our country. There are many causes of IBS, among which abnormal bile acid metabolism and intestinal flora disorder are the main pathogenic factors. Abnormal bile acid metabolism and intestinal flora disorders are found in patients with IBS-D. Intestinal flora is critical in the regulation of bile acid synthesis. Disorders of intestinal flora may lead to abnormal bile acid metabolism. Studies have pointed out that bile acid pathway (farnesoid X receptor, FXR) agonists can improve IBS-D symptoms by regulating receptor bile acid metabolism and intestinal flora. The interaction and corresponding mechanism of bile acid-intestinal flora and IBS-D were summarized in present paper.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |