Fragment N expression does not affect islet morphology and cellularity

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Presentation transcript:

Fragment N expression does not affect islet morphology and cellularity. Fragment N expression does not affect islet morphology and cellularity. A: The identification of α- and β-cells was determined by immunohistochemistry of paraffin-embedded pancreas sections with antibodies directed against glucagon (dark brown staining) and insulin (purple-red staining). The graph depicts the proportion of α- and β-cells in islets derived from the analysis of an average of 25 islets per 9- to 12-week-old wild-type and +/RIP-N mice. Data from individual mice are shown (the numbers in the sex symbols indicate which founder the animals are derived from) as well as the means ± SD values (indicated by the μ symbol in the gray area). B: Freshly isolated pancreata were homogenized and extracted with acid ethanol. Insulin concentration in the supernatant was determined by enzyme-linked immunosorbent assay. The results correspond to the means ± SD of nine (wild-type) and six (RIP-N) pancreata. C: The graph depicts the number of cells-per-islet section counted on hematoxylin-eosin–stained paraffin-embedded pancreas sections. The results are presented as in A and were derived from the analysis of 9- to 12-week-old wild-type and +/RIP-N animals (12 mice per genotype; an average of 90 islets per mouse were analyzed). D: The percentage of proliferating cells was determined by scoring Ki67-positive cells on paraffin-embedded pancreas sections (the arrow points to a Ki67-positive cell). The bar graph depicts the percentage of proliferating cells in islets (means ± SD) derived from the analysis of at least 20 histological slices obtained from nine mice per genotype. (A high-quality color digital representation of this figure is available in the online issue.)‏ Jiang-Yan Yang et al. Diabetes 2009;58:2596-2606 ©2009 by American Diabetes Association