TY - JOUR T1 - LSC - 2021 - Submicroscopic changes of type I alveolocytes in the early stages of experimental diabetes mellitus JF - European Respiratory Journal JO - Eur Respir J DO - 10.1183/13993003.congress-2021.PA3609 VL - 58 IS - suppl 65 SP - PA3609 AU - Fedorchenko Yuliya AU - Lubomyr Zaiats Y1 - 2021/09/05 UR - http://erj.ersjournals.com/content/58/suppl_65/PA3609.abstract N2 - Introduction: Diabetes is one of the leading medical and social problems of the national health systems worldwide.Objective: To study the dynamics of ultrastructural changes in type I alveolocytes in the early period of experimental diabetes mellitus.Methods: Experiments were carried out on 20 white male Wistar rats.Diabetes mellitus was induced by intraperitoneal injection of streptozotocin solution (`Sigma`, USA), diluted in 0.1 M citrate buffer with pH 4,5 in dose of 60 mg/kg of weight. Pulmonary tissue sample acquirement for electronic microscopic research was performed under thiopental narcosis after 14 and 28 days. The cuts were studied using electron microscope.Results: Conducted submicroscopic analysis, 14 days after beginning of the research, demonstrated in the most alveolocytes type I nucleus with a matrix of medium electron-optical density and uniform distribution of chromatin granules. The components of the Golgi apparatus and the granular endoplasmic reticulum were expanded slightly. Some mitochondria with an enlightened matrix were observed in several cells. Basal membrane was shown without special structural changes. With increasing duration of the research (28 days) the nucleus of alveolocytes type I were found round in shape and with marginal placement of chromatin granules. Cisterns and tubules of the Golgi apparatus and granular endoplasmic reticulum were expanded. The number of ribosomes on the membranes of the latter was reduced. Mitochondria were shown with an enlightened matrix in many cells. The basement membrane was locally thickened.Conclusions: 1. Experimental diabetes mellitus leads to disorders of the ultrastructural organization of type I alveolocytes. 2. The severity of changes in type I alveolocytes depends on the duration of diabetes.FootnotesCite this article as: European Respiratory Journal 2021; 58: Suppl. 65, PA3609.This abstract was presented at the 2021 ERS International Congress, in session “Prediction of exacerbations in patients with COPD”.This is an ERS International Congress abstract. No full-text version is available. Further material to accompany this abstract may be available at www.ers-education.org (ERS member access only). ER -