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Immuolocalization of nestin in pancreatic tissue of mice at different ages

World Journal of Gastroenterology 2008年第46期14卷 7112-7116页

作者： raj k dorisetty Sashi G kiran Malathi R Umrani Sesikeran Boindala Ramesh R Bhonde Vijayalakshmi Venkatesan Department of Biochemistry National Institute of Nutrition Tissue Engineering and Banking Laboratory National Center for Cell SciencePune University Campus

AIM： To localize nestin positive cells （NPC） in pancreatic tissue of mice of different ages. METHODS： Paraffin sections of 6-8 um of fixed pancreatic samples were mounted on poly-L-lysine coated slides and used for Immunolocalization using appropriate primary antibodies （Nestin, Insulin, Glucagon）, followed by addition of a fluorescently labeled secondary antibody. The antigen-antibody localization was captured using a confocal microscope （Leica SP 5 series）. RESULTS： In 3-6 d pups, the NPC were localized towards the periphery of the endocrine portion, as evident from immunolocalization of insulin and glucagon, while NPC were absent in the acinar portion. At 2 wk, NPC were localized in both the exocrine and endocrine portions. Interestingly, in 4-wk-old mice NPC were seen only in the endocrine portion, towards the periphery, and were colocalised with the glucagon positive cells. In the pancreas of 8- wk-old mice, the NPC were predominantly localized in the central region of the islet clusters, where immunostaining for insulin was at a maximum. CONCLUSION： We report for the first time the immunolocalization of NPC in the pancreas of mice of different ages （3 d to 8 wk） with reference to insulin and glucagon positive cells. The heterogeneous localization of the NPC observed may be of functional and developmental significance and suggest（s） that mice pancreatic tissue can be a potential source of progenitor cells. NPC from the pancreas can be isolated, proliferated and programmed to differentiate into insulin secreting cells under the appropriate microenvironment.

关键词： Nestin Insulin Glucagon Immunolocalization Mice

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