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The haemochromatotic human pancreas: a quantitative immunohistochemical and ultrastructural study.

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Rahier, Jacques [UCL] Loozen, S. Goebbels, R M Abrahem, M.

Insulin, glucagon, somatostatin and pancreatic polypeptide cells were quantified after immunoperoxidase staining in sections of pancreases obtained from nine control subjects and seven diabetic patients with primary or secondary iron overload. One was normoglycaemic, two had glucose intolerance and four presented insulin-requiring diabetes. The whole pancreas was studied, taking into account the heterogeneous distribution of the endocrine cells. In the diabetic patients, the weight of the pancreas tended to be lower. Iron overload predominated in the exocrine tissue, whereas in islets iron concentration was quite variable from case to case. At the Haemalun-Eosine staining the histological appearance of the islets was normal, their shape and size being unchanged; amyloid deposits were absent, as were atrophic islets. Immunoperoxidase staining revealed a severe reduction in the number of immunoreactive B cells in the four diabetic patients. The mass of immunoreactive B cells was calculated from their volume density and from the weight of each lobe of the pancreas. It averaged 950 mg in control subjects, 1580 mg in the normoglycaemic patient, 1010 mg in patients with glucose intolerance and 180 mg in insulin-requiring diabetic patients. The electron microscopic examination, performed in four cases, revealed that the iron deposits were restricted to B cells and associated with progressive loss of their endocrine granules. The study shows that the pancreatic islet abnormalities in iron overloaded diabetic patients are completely different from those of Type 1 (insulin-dependent) and Type 2 (non-insulin-dependent) diabetic patients. This constitutes a further argument for a specific role of iron in the pathogeny of diabetes in haemochromatotic patients.

Document type Article de périodique (Journal article) – Journal Article, Research Support, Non-U.S. Gov't
Publication date 1987
Journal information "Diabetologia" - Vol. 30, no. 1, p. 5-12 (1987)
Peer reviewed yes
issn 0012-186X
Publication status Publié
Affiliations UCL - Cliniques universitaires Saint-Luc
UCL
MESH Subject Adult ; Aged ; Hemochromatosis - pathology ; Humans ; Immunoenzyme Techniques ; Islets of Langerhans - pathology - ultrastructure ; Male ; Middle Aged
Links
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Bibliographic reference Rahier, Jacques ; Loozen, S. ; Goebbels, R M ; Abrahem, M.. The haemochromatotic human pancreas: a quantitative immunohistochemical and ultrastructural study.. In: Diabetologia, Vol. 30, no. 1, p. 5-12 (1987)
Permanent URL http://hdl.handle.net/2078.1/28434