Abstract

Using two RT–PCR quantitative assays, we measured the pancreatic expression of the two isoforms of glutamic acid decarboxylase in the foetus, newborn and 14-, 21- and 35-day-old male and female NOD and C57BL/6 mice. In the C57BL/6 mouse, GAD 67 pancreatic expression is stable; in NOD mice, GAD 67 expression is similar to that found in control mice, except at 5 weeks of age, when pancreatic GAD 67 expression is about 2.5 times higher than in C57BL/6 mice. The pancreatic expression of GAD 65 is under the detection limit of the assay until 5 weeks of age. The overexpression of GAD 67 characterized in pancreas from 5-week-old NOD mice could be the result of β cell hyperactivity, previously reported in this mouse strain.

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