Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UNIPROT:P01350 (gastrin)
 9,683 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The immunocytochemical characterization of cell lines originating from thyroid medullary carcinoma, i.e. human TT cells and rat rMTC 6-23 cells, was undertaken. The immunocytochemical studies were supplemented by ultrastructural studies, including ultrastructural immunocytochemistry, and by radioimmunological estimation of calcitonin secretion to the medium. In rMTC 6-23 cells (subcultures 24 to 30), no hormone presence was demonstrated immunocytochemically, which corresponded to the absence of secretory granules at the ultrastructural level. Of various proteins sought, only neuron-specific enolase could be demonstrated. Nevertheless, the cells secreted calcitonin into the medium. TT cells (passages 145 to 160) produced secretory granules. The granules contained calcitonin, calcitonin gene-related peptide, somatostatin, neurotensin, met-enkephalin, leu-enkephalin, gastrin releasing peptide, parathyroid hormone-related protein, functional proteins of the chromogranin group and synaptophysin. Other functional proteins found in the cytosol of TT cells included non-specific enolase, calbindin and tyrosine hydroxylase. Receptor for calcitriol was localized in the cell nucleus. Marker proteins were localized in the cytosol (carcinoembryonic antigen) and in the cell skeleton (alpha-tubulin, cytokeratin). Following changes in ionized calcium levels in the medium, changes in calcitonin secretion and in immunocytochemical detectability of some hormones and functional proteins were observed. TT cells demonstrated the expression of numerous hormones and functional proteins associated with calcitonin secretion. Further, the cells in their ultrastructure, immunocytochemical and secretory characteristics, resemble more closely normal parafollicular cells of the thyroid and, in our opinion, represent a more appropriate model for functional studies.
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PMID:Immunocytochemical characterization of two thyroid medullary carcinoma cell lines in vitro. 878 64

Recent studies have revealed that islet cells differentiate from the epithelial cells of primitive pancreatic ducts during embryogenesis, and can regenerate in response to the loss of islet cells even in adult pancreas. The ability of islet cells to regenerate raises the possibility that impaired and decreased islets of diabetic patients can be restored. In this review, factors regulating islet development including differentiation factors (Shh, activin, follistatin, and TGF alpha), transcriptional factors (PDX1, Isl1, Pax4, Pax6, Nkx2.2, Nkx6.1, BETA2, and HNF), growth factors (the EGF family, HGF, IGF-I, IGF-II, Reg, INGAP, PDGF, FGF, VEGF, and NGF), hormones (insulin, the GH family, PTHrP, TRH, and gastrin), and cell adhesion molecules (N-CAM and cadherins) are described after a short introduction and an outline of pancreatic development.
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PMID:Development of pancreatic islets (review). 1002 48

This report presents a case of pancreatic neuroendocrine cell carcinoma with multiple liver metastases secreting gastrin and parathyroid hormone-related protein (PTHrP) related to lumbar bone fracture and hypercalcemia. A 58-year-old woman visited an affiliated hospital with a chief complaint of lumbago without any evidence of trauma. She was diagnosed with hepatic dysfunction and hypercalcemia as well as multiple lumbar compression fractures without osteolytic lesions. Abdominal computed tomography (CT) showed a hypervascular mass in the pancreatic tail and multiple liver tumors. Duodenal ulcers were found with gastrointestinal endoscopy. There was a marked increase in the serum gastrin level. She was diagnosed as gastrinoma with multiple liver metastases and was admitted to the hospital. She had an increase in serum PTHrP level without the elevation of intact parathyroid hormone at the time of admission. She underwent an extended right hepatectomy in addition to a distal pancreatectomy with a regional lymphadenectomy and splenectomy. The postoperative course was uneventful, and serum gastrin and PTHrP activities reduced to normal levels. She remained symptom-free, and serum calcium, gastrin, and PTHrP levels remain within the normal ranges 19 months after surgery without adjuvant therapy.
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PMID:Pancreatic neuroendocrine cell tumor secreting parathyroid hormone-related protein and gastrin: Report of a case. 2111 Jan 69