Project description:The etiology of post-inflammatory gastrointestinal (GI) motility dysfunction, after resolution of acute symptoms of inflammatory bowel diseases (IBD) and intestinal infection, is largely unknown. Here, using an established mouse model of experimental enteritis, we show that enhancement of smooth muscle cell (SMC) contraction by interleukin (IL)-17A may be involved in postinflammatory GI hypermotility. To examine the effect of IL-17 in the small intestinal smooth muscle, we used whole genome microarray expression profiling to find out the genes which respond to IL-17 stimulus. The smooth muscle strips were peeled off from mouse small intestine and incubated 24h with or without IL-17. And we also examined the effect of 6-shogaol, which is one of the ingredients of Japanese traditional medicine for intestinal mortor disorder, Daikenchuto, in IL-17 stimulated small intestinal smooth muscle strip. The smooth muscle strips were peeled off from mice small intestine and incubated in the culture media for 24h with or without IL-17. A part of IL-17 stimulated strips were co-incubated with 6-shogaol. Six independent experiments were performed.
Project description:The etiology of post-inflammatory gastrointestinal (GI) motility dysfunction, after resolution of acute symptoms of inflammatory bowel diseases (IBD) and intestinal infection, is largely unknown. Here, using an established mouse model of experimental enteritis, we show that enhancement of smooth muscle cell (SMC) contraction by interleukin (IL)-17A may be involved in postinflammatory GI hypermotility. To examine the effect of IL-17 in the small intestinal smooth muscle, we used whole genome microarray expression profiling to find out the genes which respond to IL-17 stimulus. The smooth muscle strips were peeled off from mouse small intestine and incubated 24h with or without IL-17. And we also examined the effect of 6-shogaol, which is one of the ingredients of Japanese traditional medicine for intestinal mortor disorder, Daikenchuto, in IL-17 stimulated small intestinal smooth muscle strip.
Project description:We wanted to assess the role of a specific smooth muscle protein (MMP17) in two different intestinal compartments, the epithelium (crypts) and the smooth muscle. To do that we isolate intestinal crypts from wild-type (WT) and knockout (KO, Mmp17-/-) mice, and obtained clean strips of smooth muscle. After muscle dissociation, we obtained RNA directly from crypts and muscle, and it was used for RNA-seq. By comparing WT and KO samples we observed a higher impact in gene expression affecting crypts, even though MMP17 is only expressed in muscle. This helped us to identify altered signaling pathways in KO crypts that linked MMP17 with SMAD4 and BMP signaling.
Project description:To evaluate the intestinal epithelial responses induced by IL-17, single-cell RNA-sequencing (scRNA-seq) was performed on the human small intestinal organoids (enteroids) sample of treated with and without 100 mg/ml IL-17
Project description:In order to unravel the impact of intestinal smooth muscle tissue on the intestinal epithelium, we isolated clean smooth muscle, cultured it for 24h in DMEM-F12, and collected the supernatant (muscle-SN). This supernatant was used to treat small intestinal organoids (made of intestinal epithelium), compared to normal ENR treatment. After 5 days of muscle-SN exposure, we disrupted the organoids, and directly isolate the RNA. RNA-seq was performed in this sample to assess the genetic changes induced by muscle products.
Project description:Rationale— Aortic dissection (AD) is a fatal disease that occurs suddenly without preceding clinical signs or symptoms. It is desirable to prevent AD before the onset. Although high salt intake is an established risk factor for cardiovascular diseases, the relationship between high salt intake and AD has not been clarified. Although recent studies have shown that high salt intake promotes interleukin (IL)-17-dependent inflammation, it is unknown whether this mechanism is involved in the pathogenesis of AD. Objective— The purpose of this study was to investigate the effect of high salt challenge on AD and involvement of IL-17. Methods and Results— We used a mouse AD model that was induced by continuous infusion of -aminopropionitrile and angiotensin II. High salt challenge exacerbated AD lesion length compared to the mice without high salt challenge, which was abolished in IL-17 knockout mice. Unexpectedly, deletion of IL-17 resulted in the activation of Smad pathway, induction of synthetic phenotype of smooth muscle cells, remodeling of extracellular matrix in aortic tunica media, reduced stiffness of aortic walls, and less stress-induced activation of NFkB. Conclusions— These findings establish the worsening effect of high salt intake on AD that involves IL-17 pathway through the extracellular matrix metabolism. Salt restriction may represent a low-cost and practical way to reduce AD risk.
Project description:To evaluate the intestinal epithelial responses induced by IL-17, bulk RNA-sequencing (RNA-seq) was performed on the human small intestinal organoids (enteroids, n = 3) treated with different concentrations of IL-17 (0 ng/ml. 1 ng/ml, 10 ng/ml and 100 ng/ml) .
Project description:Smooth muscle is an essential component of the intestine, both to maintain its structure and produce peristaltic and segmentation movements. However, very little is known about other putative roles that smooth muscle may have. Here, we show that smooth muscle is the dominant supplier of BMP antagonists, which are niche factors that are essential for intestinal stem cell maintenance. Furthermore, muscle-derived factors can render epithelium reparative and fetal-like, which includes heightened YAP activity. Mechanistically, we find that the matrix metalloproteinase MMP17, which is exclusively expressed by smooth muscle, is required for intestinal epithelial repair after inflammation- or irradiation-induced injury. Furthermore, we provide evidence that MMP17 affects intestinal epithelial reprogramming indirectly by cleaving the matricellular protein PERIOSTIN, which itself is able to activate YAP. Together, we identify an important signaling axis that firmly establishes a role for smooth muscle as a modulator of intestinal epithelial regeneration and the intestinal stem cell niche.
Project description:Smooth muscle is an essential component of the intestine, both to maintain its structure and produce peristaltic and segmentation movements. However, very little is known about other putative roles that smooth muscle may have. Here, we show that smooth muscle is the dominant supplier of BMP antagonists, which are niche factors that are essential for intestinal stem cell maintenance. Furthermore, muscle-derived factors can render epithelium reparative and fetal-like, which includes heightened YAP activity. Mechanistically, we find that the matrix metalloproteinase MMP17, which is exclusively expressed by smooth muscle, is required for intestinal epithelial repair after inflammation- or irradiation-induced injury. Furthermore, we provide evidence that MMP17 affects intestinal epithelial reprogramming indirectly by cleaving the matricellular protein PERIOSTIN, which itself is able to activate YAP. Together, we identify an important signaling axis that firmly establishes a role for smooth muscle as a modulator of intestinal epithelial regeneration and the intestinal stem cell niche.
Project description:We generated genome-wide methylation data from primary cultured airway smooth muscle cells (ASMCs) exposed to IL-13, IL-17, IL-13+IL-17, and vehicle. This data was generated in combination with genome-wide expression data from the same individuals.