Heterogeneity in distribution of amyloid-positive islets in type-2 diabetic patients

• Published in: Virchows Archiv : an international journal of pathology Vol. 446; no. 3; pp. 232 - 238
• Main Authors: BORROMEO, Cecilia M, POTTIER, Xavier, IN'T VELD, Peter A, PIPELEERS-MARICHAL, Miriam A, KAUFMAN, Leonard, PIPELEERS, Daniel G, VAN SCHRAVENDIJK, Christiaan F
• Format: Journal Article
• Language: English
• Published: Berlin Springer 01.03.2005; Springer Nature B.V
• Subjects: Aged; Aged, 80 and over; Amyloid - metabolism; Biological and medical sciences; Diabetes Mellitus, Type 2 - metabolism; Diabetes Mellitus, Type 2 - pathology; Female; Heterogeneity; Humans; Image Processing, Computer-Assisted; Immunohistochemistry; Investigative techniques, diagnostic techniques (general aspects); Islets of Langerhans - metabolism; Islets of Langerhans - pathology; Male; Medical sciences; Pancreas; Pancreatic Polypeptide - metabolism; Pathology. Cytology. Biochemistry. Spectrometry. Miscellaneous investigative techniques; Regions; Endocrinopathy; Type 2 diabetes; Human; Islet amyloid; Langerhans islet; Metabolic diseases; Type-2 diabetes; Heterogeneity; Anatomic pathology; Distribution; Human pancreas; Amyloid; Islets of Langerhans; Morphometry; Endocrine pancreas
• ISSN: 0945-6317; 1432-2307
• DOI: 10.1007/s00428-004-1171-5

Amyloid-containing (A+) islets are characteristic for type-2 diabetes (T2D), but their abundance seems variable among patients. It is unclear whether the distribution of A+ islets follows a certain pattern or occurs randomly throughout the pancreatic organ. We investigated the topography of A+ islets in eight pancreata of T2D patients and eight sex- and age-matched non-diabetic subjects. Transversal sections of head, body and tail segments were stained with synaptophysin combined with Congo red to map/quantify islet tissue and amyloid. In the eight T2D pancreata, the overall percentage of A+ islets varied from 4% to 85%. Further analysis in body and tail indicated that peripheral regions exhibited higher percentages of A+ islets than central regions (averages of, respectively, 30% and 17%, P<0.05). Non-diabetic control pancreata also exhibited A+ islets, albeit at a 25-fold lower frequency; a tendency towards higher percentage of A+ islets in peripheral versus central regions was also observed. The higher percentage A+ islets in peripheral regions was associated with a higher density and relative islet over exocrine surface area. These observations on heterogeneity in abundance and distribution of A+ islets need consideration when sampling tissue for studies on human islet amyloidosis. The present methodology allows us to further investigate the susceptibility to amyloidosis of islets in peripheral regions of the pancreas.