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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Immunohistochemical detection of the enzyme glutamic acid decarboxylase and hormones of the islets of Langerhans in spontaneous insulin-dependent diabetes mellitus in cattle.

Immunohistochemical expression of glutamic acid decarboxylase (GAD) enzyme was detected in the pancreatic islets of 12 cattle with spontaneous insulin-dependent diabetes mellitus (IDDM). The most characteristic changes were atrophy and decreased number of pancreatic islets, enlarged islets with vacuolated beta cells, and lymphocytic islet adenitis. Atrophied islets were composed of small islet cells without cytoplasmic insulin-positive granules. Immunohistochemically, GAD was not found in the cytoplasm of atrophied islet cells. Furthermore, enlarged islets consisting of islet cells with vacuolated cytoplasm were frequently observed. The cytoplasm of vacuolated cells contained very few GAD- and insulin-positive granules, indicating beta cell destruction. Enlarged islets with mild lymphocytic infiltrates were frequently observed. These findings suggest that islet cells in cattle with IDDM lose their insulin synthesis function and their ability to regulate hormonal secretion of alpha and delta cells.[1]

References

  1. Immunohistochemical detection of the enzyme glutamic acid decarboxylase and hormones of the islets of Langerhans in spontaneous insulin-dependent diabetes mellitus in cattle. Taniyama, H., Oka, S., Yokota, H., Hirayama, K., Kagawa, Y., Kurosawa, T., Furuoka, H., Ono, T. Vet. Pathol. (1999) [Pubmed]
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