کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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2022864 | 1542423 | 2010 | 7 صفحه PDF | دانلود رایگان |
IntroductionBeta-cell-regeneration is considered as a future option for the therapy of diabetes, but the detection of beta-cell replication in human pancreas is still challenging. Therefore, the expression of Ki67, PCNA and MCM-7 in human pancreatic tissue was quantified in order to validate their use as beta-cell replication markers.MethodsHuman pancreatic tissue samples were stained for Ki67, PCNA, MCM7, insulin and nuclei, and the expression of replication markers was quantified. Co-expression of the markers was assessed by four-colour fluorescence-staining.ResultsAll three markers could be detected in endocrine and exocrine tissue. There was a significant correlation between the expression frequencies of all three markers in the exocrine tissue (r > 0.49, respectively) and in beta-cells (r > 0.95, respectively). A subset of beta-cells with differential expression of the three replication markers was identified. Quantitative analyses revealed that only 36–55% of all exocrine cells expressed two markers at the same time.ConclusionsThe expression of Ki67, MCM-7 and PCNA in adult human pancreas is highly correlated, but the labelling of individual cells differs between the markers. The analysis of a combination of markers, preferably MCM7 and Ki67, appears to yield the most reliable results for the determination of beta-cell replication and may allow for a differentiation of cell cycle stages.
Journal: Regulatory Peptides - Volume 162, Issues 1–3, 8 June 2010, Pages 115–121