The origin of pancreatic endocrine cells is unknown. Some studies have suggested that there is a common pancreatic progenitor which gives rise to both endocrine and exocrine cells, while others have suggested separate endocrine and exocrine lineages. Previous conclusions have been based on indirect data, such as the co-expression of molecular markers. We directly assessed the relationship betwe...

The gastrointestinal endocrine cells are essential for life. They regulate the gastrointestinal motility, secretion, visceral sensitivity, absorption, local immune defense, cell proliferation and appetite. These cells act as sensory cells with specialized microvilli that project into the lumen that sense the gut contents (mostly nutrients and/or bacteria byproducts), and respond to luminal stim...

During pancreatic development, transcription factor cascades gradually commit precursor populations to the different endocrine cell fate pathways. Although mutational analyses have defined the functions of many individual pancreatic transcription factors, the integrative transcription factor networks required to regulate lineage specification, as well as their sites of action, are poorly unders...

Islets are composed mostly of -cells, and therefore stem cell research has concentrated on generating purified -cells, neglecting the other endocrine cell types in the islet. We investigated the presence of endocrine non– cells after islet transplantation. In addition, we studied whether the transplantation of pure -cells, in volumes similar to that used in islet transplantation, would suffice ...

One major unresolved question in the field of pancreas biology is whether ductal cells have the ability to generate insulin-producing β-cells. Conclusive examination of this question has been limited by the lack of appropriate tools to efficiently and specifically label ductal cells in vivo. We generated Sox9CreER(T2) mice, which, during adulthood, allow for labeling of an average of 70% of pan...

The pancreatic endocrine cells of the ray, Dasyatis akajei was studied by aldehyde-fuchsin-Masson-Goldner's staining and by immunohistochemical methods. The pancreatic endocrine cells of the ray do not form islets by represent the most primitive distribution among elasmobranchs, occupying the outer layer of the double-layered duct epithelium of the pancreas. The endocrine cells showed no eviden...

the classical triad of mccune-albright syndrome (mas) consists of polyostotic fibrous dysplasia (fd), skin hyperpigmentation (café-au-lait spots), and endocrine dysfunction, frequently seen in females as precocious puberty. etiology is genetically based and is explained by mosaicism of activating somatic mutations of the alpha-subunit of gs protein. clinical presentation is varied and is depend...

Background: Atrazine (ATR), an herbicide, is used in order to control broadleaf and grassy weed. ATR has been estimated to impact the testicular tissue both by inhibiting the endocrine system and partly by reducing the antioxidant status. Thus, current study was designed to evaluate the protective effect of vitamin E and testosterone against ATR-induced damages in testicular tissue. Materials a...

9 1992 Blackwell Scientific Publications, Inc. The pancreatic islet and the adenohypophysis are endocrine tissues sharing several properties. These organs are both composed of different endocrine cells secreting a variety of hormones. These are stored within the cells in dense core secretory vesicles and are released by appropriate stimuli. In addition to dense core secretory vesicles, endocrin...

AIM To identify the types of endocrine cells in the pancreas of the Sunda porcupine (Hystrix javanica) and its immunolocalization. MATERIALS AND METHODS Five adult H. javanica were used without sexual distinction. The presences of endocrine cells (glucagon, insulin, somatostatin, and pancreatic polypeptide [PP]) in pancreatic tissues were detected using the avidin-biotin-peroxidase complex me...