• How Does Estrogen Receptor Signaling Promote Growth of Liver Tumors?

How Does Estrogen Receptor Signaling Promote Growth of Liver Tumors?

The G-protein–coupled estrogen receptor (GPER1) is a hepatic sensor of estrogen that regulates liver growth during development, regeneration, and tumorigenesis, researchers show in a study of zebrafish and human liver published in the May issue of Gastroenterology. Inhibitors of GPER1 might be developed for liver cancer prevention or treatment. Liver cancer

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  • Combined Genetic and Clinical Data Do Not Improve Determination of Risk for Esophageal Adenocarcinoma

Combined Genetic and Clinical Data Do Not Improve Determination of Risk for Esophageal Adenocarcinoma

Addition of genetic information to clinical factors does not increase identification of individuals at risk for esophageal adenocarcinoma, researchers report in the January 2019 issue of Gastroenterology. New screening and risk evaluation methods are needed to improve early detection of esophageal adenocarcinoma, because most patients receive a diagnosis at a late

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  • Decreased Microvilli Length, and Associated Gene Expression Changes, in Patients With Crohn’s Disease

Decreased Microvilli Length, and Associated Gene Expression Changes, in Patients With Crohn’s Disease

In an analysis of intestinal tissues from patients with Crohn’s disease (CD), researchers identified specific changes in gene expression patterns that associate with histologic changes, such as differences in microvilli length. Decreased microvilli length, via decreased expression of the microvilli gene set, might contribute to epithelial malfunction and the chronic

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  • What Changes Occur in the Esophageal Epithelial Barrier During Disease Development?

What Changes Occur in the Esophageal Epithelial Barrier During Disease Development?

A review article in the May issue of Clinical Gastroenterology and Hepatology discusses esophageal epithelial barrier structure and function, new and old techniques for studying this barrier, and changes that occur during development of esophageal diseases. To identify mechanisms of diseases associated with barrier dysfunction, such as gastroesophageal reflux disease (GERD), eosinophilic esophagitis,

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  • What are the Challenges to In Vitro Maturation of Hepatic Stem Cells?

What are the Challenges to In Vitro Maturation of Hepatic Stem Cells?

New approaches are needed to generate and maintain stable and mature adult liver cells ex vivo. In the April issue of Gastroenterology, Bart Spee and colleagues review factors that promote hepatocyte differentiation and maturation, and consider criteria for establishing whether cells derived from stem cells are fully mature hepatocytes. They discuss challenges to cell transplantation and

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  • How Can We Study Genetic Heterogeneity Within Hepatocellular Carcinomas?

How Can We Study Genetic Heterogeneity Within Hepatocellular Carcinomas?

Researchers have developed a patient-derived cell line-based model to study how intratumor heterogeneity affects sensitivity of hepatocellular carcinoma (HCC) to different therapeutic agents, reported in the January issue of Gastroenterology. HCCs have a large amount of genetic heterogeneity within each tumor, making them difficult to treat. Multiple regions of tumors

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  • A Forward Genetic Screen Identifies Suppressors of Hepatocellular Carcinogenesis

A Forward Genetic Screen Identifies Suppressors of Hepatocellular Carcinogenesis

Using 2 powerful high-throughput in vivo screening tools, researchers identified and validated 27 genes as suppressors of hepatocellular carcinoma (HCC), reported in the August issue of Gastroenterology. Their findings support the role of Ras signaling in development of HCC and provide new therapeutic targets. Sorafenib is the only treatment for patients

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  • Can Microbial Dysbiosis Cause Colonic Inflammation?

Can Microbial Dysbiosis Cause Colonic Inflammation?

Dysbiosis contributes to the pathogenesis of inflammatory bowel diseases (IBD) by altering colonic expression of genes that regulate inflammation and the immune response, researchers report in the July issue of Cellular and Molecular Gastroenterology and Hepatology. An altered intestinal microbiota composition has been associated with IBD. However, it is not

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  • What can we do with Gastrointestinal Organoids?

What can we do with Gastrointestinal Organoids?

Researchers review the latest discoveries from studies of tissue-derived and pluripotent stem cell–derived intestinal, gastric, esophageal, liver, and pancreatic organoids in the May issue of Gastroenterology. Studies of organoids have provided valuable information about GI development, tissue homeostasis, and disease and might be used to develop personalized medicines. In vitro organoid cultures are

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In Vitro Stomach?

Researchers have developed an advanced, long-term, 3-dimensional organoid culture system for primary, untransformed human gastric epithelium. The system, described in the January issue of Gastroenterology, provides evidence for the presence of stem cells in adult human gastric tissue and can be used to study changes that occur in the gastric epithelium during

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