Riassunto
Gli AA. riferiscono i risultati di alcune indagini morfologiche intorno alla micro-angiopatia diabetica, condotte con l'ausilio della microscopia ottica e di quella elettronica su 92 frammenti bioptici (58 di rene, 25 di muscolo e 9 di gengiva). Essi confermano il carattere ubiquitario delle lesioni capillari, ma riferiscono di aver rilevato alcune differenze circa la sede dell'apposizione di sostanze elettrondense sulla membrana basale dei capillari (versante interno nei capillari glomerulari; versante esterno nei capillari del muscolo e della gengiva). Gli AA. ritengono che l'evoluzione delle lesioni iniziali della nefroangiopatia diabetica proceda secondo le seguenti tappe: proliferazioni delle cellule mesangiali con produzione di sostanza simil-membrana od apposizione sul suo versante endoteliale di sostanze elettrondense; comparsa di fibrille collagene.
Resume
Les AA. portent les résultats obtenus avec des recherches morphologiques sur la micro-angiopathie diabétique, conduites avec l'aide de la microscopie optique et électronique sur 92 fragments bioptiques (58 rénales, 25 musculaires, 9 gencivales). Ils confirment le caractère ubiquitaire des lesions capillaires, mais ils référent d'avoir relevé certaines differences sur le siège de l'apposition de substances électrondenses sur la membrane basale des capillaires (côté interne dans les capillaires glomerulaires; côté externe dans les capillaires du muscle et de la gencive). Les. AA. pensent que l'évolution des lesions initiales de la néphroangiopathie diabétique procéde suivant des étapes: prolifération des cellules mesangiales avec production d'une substance semblable la membrane basale; épaissement authentique de la membrane basale glomerulaire ou apposition sur sa côté endothéliale de substances électrondenses; apparition de fibrilles collagènes.
Resumen
Los AA. refieren los resultados de algunas investigaciones morfológicas sobre la micro-angiopatía diabética, hechas con auxilio de la microscopía óptica y electrónica, en 92 fragmentos para biopsia (58 de riñon, 25 de músculo y 9 de encía). Ellos confirman el carácter ubiquitario de las lesiones capilares, pero refieren haber notado algunas diferencias por lo que respecta a la localización de la aposición de substancias electrón-densas sobre la membrana basal de los capilares (superficie interna en los capilares glomerulares; superficie externa en los capilares del músculo y de encía). Los AA. piensan que la evolución de las lesiones iniciales en la nefro-angiopatía diabética proceda a las siguientes etapas: proliferaciones de la células mesangiales con producción de substancia similmembrana basal; espesamiento auténtico de la membrana basal glomerular o aposición en su superficie endotelial de substancias electrón-densas; aparición de fibrilas colágenas.
Zusammenfassung
Die AA. berichten ueber die Resultate einiger morphologischer Untersuchungen bei der diabetischen Mikro-Angiopathie, die mittels der optischen und Elektronenmikroskopie an 92 Biopsien (58 von der Niere, 25 von Muskeln, 9 vom Zahnfleisch) durchgefuehrt wurden. Sie bestaetigen den ubiquitaeren Charakter der Kapillarschaeden, teilen aber mit, einige Unterschiede festgestellt zu haben, was den Appositionssitz von elektronendichten Substanzen an der Basalmembran der Kapillaren anbetrifft (Innenseite der Glomerulum-Kapillaren; Aussenseite der Muskel- und Zahnfleischkapillaren). Die AA. glauben, dass die Entwicklung der Anfangsschaeden der diabetischen Nephroangiopathie laut folgenden Etappen fortschreitet: Proliferationen der mesangialen Zellen und Produktion von Basalmembran-aehnlicher Substanz; authentische Verdickung der glomerularen Basalmembran oder Apposition von elektronendichten Substanzen an ihrer Innenseite; Auftreten von kollagenen Fibrillen.
Summary
The results of some morphological researches about diabetic micro-angiopathy performed by means of light and electronic microscopy on 92 bioptical small pieces (58 from kidney, 25 from muscle and 9 from gum) are referred by the AA. The ubiquitous character of the capillary damage is confirmed but some differences are also noticed concerning the seat where electron-dense material is present in the capillary basement membrane (inside the glomerular capillaries, outside the muscle and gum capillaries). According to the AA. opinion, the initial damage of diabetic nephroangiopathy has an evolution with the following steps: mesangial cell proliferation with production of a basement-membran-like material; true thickening of glomerular basement membrane or affixing on its endothelial side of electron-dense material; appearance of collagenous fibrils.
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Fiaschi, E., Naccarato, R., Scuro, L.A. et al. La micro-angiopatia diabetica. Acta diabet. lat 6, 87–120 (1969). https://doi.org/10.1007/BF01548041
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DOI: https://doi.org/10.1007/BF01548041