Proinsulin Processing and Transplanted Islets
نویسندگان
چکیده
منابع مشابه
Revascularization of Transplanted Islets
Pancreatic islets are highly vascularized, which is important in their ability to quickly secrete insulin in response to changes in blood glucose. Although pancreatic islets comprise only 1–2% of pancreatic mass, they receive 5–10% of pancreatic blood flow. Blood vessels within pancreatic islets are of a greater density than those in surrounding exocrine tissue and are lined with fenestrated en...
متن کاملKinetics of proinsulin conversion in human islets.
Islets isolated from human cadaver pancreas were pulse-labeled (10 min with [3H]leucine) and then incubated for a 180-min chase. Islets and chase medium were collected every 15 min and analyzed by reversed-phase HPLC to quantify the percentage of radioactively labeled proinsulin, conversion intermediates, and fully processed insulin. Release of proinsulin-related labeled products into the chase...
متن کاملProinsulin precursors in catfish pancreatic islets.
The purpose of these experiments was to determine whether insulin-related peptides, larger than proinsulin, could be detected in pancreatic islet cells. Catfish pancreatic islets were incubated with radiolabeled amino acids. After 15- to 60-min incubation, two acid-alcohol-extractable peptides, larger than proinsulin, were detected which were approximately of Mr = 12,000 and 11,000 (12 K and 11...
متن کاملMRI of transplanted pancreatic islets.
A promising treatment method for type 1 diabetes mellitus is transplantation of pancreatic islets containing beta-cells. The aim of this study was to develop an MR technique to monitor the distribution and fate of transplanted pancreatic islets in an animal model. Twenty-five hundred purified and magnetically labeled islets were transplanted through the portal vein into the liver of experimenta...
متن کاملIn Vivo Imaging of Transplanted Pancreatic Islets
The beta-cells in the islets of Langerhans in the pancreas secrete insulin and play an important role in glucose homeostasis. Diabetes, characterized by hyperglycemia, results from an absolute or a relative deficiency of the pancreatic beta-cell mass. Islet transplantation has been considered to be a useful therapeutic approach, but it is largely unsuccessful because most of the transplanted is...
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ژورنال
عنوان ژورنال: American Journal of Transplantation
سال: 2010
ISSN: 1600-6135,1600-6143
DOI: 10.1111/j.1600-6143.2010.03069.x