Abstract

Gangliosides in pancreas, kidney, and liver tissues from streptozotocin-induced diabetic rats were analyzed by methods including thin-layer Chromatographic (TLC) immunostaining with a specific monoclonal antibody to c-series gangliosides. In rats suffering diabetes for one month, the composition of major gangliosides in pancreatic tissue was almost identical to control, except for a slight increase in the content of GM3. Though c-series gangliosides such as GT3, GT2, GQ1c, and CP1c were expressed in normal pancreatic tissue, they were practically lost in pancreas of diabetic animals. A specific loss of c-series gangliosides was also observed in pancreatic tissue from rats suffering diabetes only for three days. While the composition of major gangliosides in the kidney did not change, streptozotocin-induced diabetic conditions brought about significant increases in contents of practically all major ganglioside species in liver tissue. No change was observed in the amount and composition of c-series gangliosides in both tissues. These results strongly suggest that c-series gangliosides are specifically localized in pancreatic B cells.

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