Chemicals in food are widely used leading to significant human exposure. Allura Red AC (AR) is a highly common synthetic colorant; however, little is known about its impact on colitis. Here, we show chronic exposure of AR at a dose found in commonly consumed dietary products exacerbates experimental models of colitis in mice. While intermittent… Continue reading Chronic exposure to synthetic food colorant Allura Red AC promotes susceptibility to experimental colitis via intestinal serotonin in mice
Category: Gastroenterology
Dysregulated amino acid sensing drives colorectal cancer growth and metabolic reprogramming leading to chemoresistance
Background and AimsCRC is a devastating disease highly modulated by dietary nutrients. mTORC1 contributes to tumor growth and limits therapy responses. Growth factor signaling is a major mechanism of mTORC1 activation. However, compensatory pathways exist to sustain mTORC1 activity following therapies that target oncogenic growth factor signaling. Amino acids potently activate mTORC1 via amino acid… Continue reading Dysregulated amino acid sensing drives colorectal cancer growth and metabolic reprogramming leading to chemoresistance
Repeated psychological stress, chronic vicarious social defeat stress, evokes irritable bowel syndrome-like symptoms in mice
Increasing evidence has demonstrated that emotional states and intestinal conditions are inter-connected in so-called “brain–gut interactions.” Indeed, many psychiatric disorders are accompanied by gastrointestinal symptoms, such as the irritable bowel syndrome (IBS). However, the functional connection remains elusive, partly because there are few useful experimental animal models. Here, we focused on a highly validated animal… Continue reading Repeated psychological stress, chronic vicarious social defeat stress, evokes irritable bowel syndrome-like symptoms in mice
Latiglutenase Protects the Mucosa and Attenuates Symptom Severity in Patients With Celiac Disease Exposed to a Gluten Challenge
AbstractBackground and aims: Gluten ingestion in patients with celiac disease can lead to gastrointestinal symptoms and small intestinal mucosal injury.Methods: This gluten challenge phase 2 trial was double blind and placebo controlled, and it assessed the efficacy and safety of a 1200-mg dose of IMGX003 in patients with celiac disease exposed to 2 g of gluten per… Continue reading Latiglutenase Protects the Mucosa and Attenuates Symptom Severity in Patients With Celiac Disease Exposed to a Gluten Challenge
The γδ IEL effector API5 masks genetic susceptibility to Paneth cell death
Loss of Paneth cells and their antimicrobial granules compromises the intestinal epithelial barrier and is associated with Crohn’s disease, a major type of inflammatory bowel disease. Non-classical lymphoid cells, broadly referred to as intraepithelial lymphocytes (IELs), intercalate the intestinal epithelium. This anatomical position has implicated them as first-line defenders in resistance to infections, but their… Continue reading The γδ IEL effector API5 masks genetic susceptibility to Paneth cell death
Changing Flows Balance Nutrient Absorption and Bacterial Growth along the Gut
Small intestine motility and its ensuing flow of luminal content impact both nutrient absorption and bacterial growth. To explore this interdependence we introduce a biophysical description of intestinal flow and absorption. Rooted in observations of mice we identify the average flow velocity as the key control of absorption efficiency and bacterial growth, independent of the… Continue reading Changing Flows Balance Nutrient Absorption and Bacterial Growth along the Gut
Epithelial HVEM maintains intraepithelial T cell survival and contributes to host protection
Intestinal epithelia maintain T cellsImmune surveillance of the intestinal epithelium is crucial for intestinal homeostasis and protecting against infection. However, how the intestinal epithelium helps induce immune surveilling intraepithelial T cells (IET) is unclear. Here, Seo, Takahashi, and Wang et al. used mouse knockout models to demonstrate that herpes virus entry mediator (HVEM), a TNFR… Continue reading Epithelial HVEM maintains intraepithelial T cell survival and contributes to host protection
Modifications of Behavior and Inflammation in Mice Following Transplant with Fecal Microbiota from Children with Autism
Highlights•Modifications of behavior and inflammatory factors in mice gut-brain axis.•Key role of gut microbiota during the different developmental phases of ASD.•Fecal microbiota transplant improves ASD symptoms.AbstractAutism spectrum disorder (ASD) is a neurodevelopmental disorder displaying the modification of complex human behaviors, characterized by social interaction impairments, stereotypical/repetitive activities and emotional dysregulation. In this study, fecal microbiota… Continue reading Modifications of Behavior and Inflammation in Mice Following Transplant with Fecal Microbiota from Children with Autism
Dual stromal targeting sensitizes pancreatic adenocarcinoma for anti-PD-1 therapy
Background and AimsThe stroma in pancreatic ductal adenocarcinoma (PDAC) contributes to its immunosuppressive nature and therapeutic resistance. Herein we sought to modify signaling and enhance immunotherapy efficacy by targeting multiple stromal components through both intracellular and extracellular mechanisms.MethodsA murine liver metastasis syngeneic model of PDAC was treated with focal adhesion kinase inhibitor (FAKi), anti-PD-1 antibody… Continue reading Dual stromal targeting sensitizes pancreatic adenocarcinoma for anti-PD-1 therapy
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