کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2800772 1156125 2011 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ultrastructural analysis, zinc transporters, glucose transporters and hormones expression in new world primate (Callithrix jacchus) and human pancreatic islets
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی علوم غدد
پیش نمایش صفحه اول مقاله
Ultrastructural analysis, zinc transporters, glucose transporters and hormones expression in new world primate (Callithrix jacchus) and human pancreatic islets
چکیده انگلیسی

The New world primates (NWP) Callithrix jacchus separated from man approximately 50 million years ago and is a potential alternative small non-human primate model for diabetes research. Ultrastructure, and gene expression of pancreatic islets and the recently described diabetes auto antigenic zinc transporters families in human, NWP and pig pancreas were studied. Morphologically NWP islets were larger than pig islets and similar in size to human islets. NWP islets alpha cells had high dense core surrounded by a limiting membrane, beta cells by the mixed morphology of the granule core, and delta cells by moderate opaque core. Antibody staining for insulin, glucagon, somatostatin and Glucagon-like peptide-1 (GLP-1) showed that the distribution pattern of the different cell types within islets was comparable to pig and human islets. In all three species protein expression of zinc transporter ZnT8 was detected in most of the insulin producing beta cells whereas Zip14 expression was widely expressed in alpha and beta cells. In both human and NWP little or no expression of Glut2 was observed compared to Glut1 and glucokinase at the protein level, however the messenger RNA level of Glut2 was greater than Glut1 and glucokinase. In contrast all three glucose transporters were expressed in pig islets at the protein level. The expression of Zip14 in islets is reported for the first time. In conclusion NWP pancreatic islets express comparable islet cell types and distribution to humans and pigs. Importantly, marmosets have a similar glucose transporter profile to humans, making this non-endangered primate species a useful animal model for pancreatic biology.


► New world primate islets have not yet been studied in comparison to human islets.
► New world primate islets are smaller than human islets but have similar cell content.
► New world primate islets express comparable zinc transporters to human islets.
► Zinc transporter ZIP14 was found for the first time in human and primate islets.
► New world primate islets are comparable to humans and a novel model for diabetes.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: General and Comparative Endocrinology - Volume 174, Issue 2, 1 November 2011, Pages 71–79
نویسندگان
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