
REPORTS OF MORPHOLOGY
Official Journal of the Scientific Society of Anatomists,
Histologists, Embryologists and Topographic Anatomists
of Ukraine
© 2022 National Pirogov Memorial Medical University, Vinnytsya
journal homepage: https://morphology-journal.com
5
DOI: 10.31393/morphology-journal-2022-28(1)-01 Reports of Morphology, Vol. 28, №1, Pages 5-10
ISSN 1818-1295 eISSN 2616-6194
Introduction
Today, diabetes mellitus (DM) occupies one of the first
places in the structure of endocrine diseases [4, 18].
According to the scientific literature in recent years, there
has been a steady increase in the number of patients with
diabetes [1, 8, 22, 23, 27]. According to the WHO, by 2030
the number of patients with diabetes will reach 438 million
(6-8% of the adult population), with more than 90% are
The role of neutrophilic granulocytes in the development of acute
lung injury in experimental diabetes mellitus
Zaiats L.M., Fedorchenko Yu.V.
Ivano-Frankivsk National Medical University, Ivano-Frankivsk, Ukraine
Diabetes mellitus takes one of the first places in the structure of endocrine diseases.
Among the complications of diabetes are sufficiently described nephro- and retinopathy,
neuropathy, damage to the cardiovascular system. However, changes in the respiratory
system and, in particular, the state of the endothelium of the pulmonary hemocapillaries
and the morphofunctional state of neutrophilic granulocytes remain poorly understood.
The aim of this study was to determine the role of neutrophilic granulocytes in the
pathogenesis of acute lung injury in experimental diabetes mellitus. The experiments
were performed on 88 white male Wistar rats weighing 170-210 g. The animals were
divided into three groups: 1 - intact (n=10); 2 - control (n=40); 3 - experimental (n=38)
with a model of diabetes mellitus, which was reproduced by intraperitoneal administration
of streptozotocin company "Sigma" (USA), diluted in 0.1 M citrate buffer with pH 4.5, at
a rate of 60 mg/kg body weight. An equivalent dose of 0.1 M citrate buffer solution with
a pH of 4.5 was intraperitoneally administered to the control group of animals. Pulmonary
tissue collection for electron microscopic examination was performed under thiopental
anesthesia 14, 28, 42, 70 days after streptozotocin administration. Pieces of lung
tissue were fixed in 2.5% glutaraldehyde solution, followed by fixation in 1% osmium
tetroxide solution. After dehydration, the material was poured into epon-araldite. Sections
obtained on an ultramicrotome "Tesla BS-490" were studied in an electron microscope
"PEM-125K". It was found that in the early stages of diabetes mellitus (14-28 days)
there is a violation of the rheological properties of blood, as evidenced by erythrocyte
aggregates, excessive accumulation of neutrophils, their adhesion and aggregation in
the hemocapillaries of the alveolar wall. With the extension of the experiment (42-70
days) there is a progressive violation of the ultrastructural organization of
hemocapillaries of the alveolar wall and pronounced changes in the rheological
properties of blood. Erythrocyte sludges and leuco-platelet aggregates are determined
in the lumen of microvessels. Increased permeability of hemocapillaries of the alveolar
wall leads to the emigration of neutrophilic granulocytes into the interstitium and the
lumen of the alveoli with the development of interstitial and intraalveolar edema. Thus,
streptozotocin-induced diabetes is accompanied by the development of acute lung
damage in the pathogenesis of which the leading role belongs to neutrophilic
granulocytes. The nature and severity of changes in the lungs depends on the duration
of exposure to hyperglycemia.
Keywords: neutrophilic granulocytes, hemocapillaries, lungs, diabetes mellitus.
ARTICLE INFO
Received: 3 November 2021
Accepted: 15 December 2021
UDC: 616.24+616.092.9+616.379-
008.64
CORRESPONDING AUTHOR
e-mail: patfisiology@ifnmu.edu.ua
Zaiats L.M.
CONFLICT OF INTEREST
The authors have no conflicts of interest
to declare.
FUNDING
Not applicable.
people with type 2 diabetes [7, 15]. The severity of this
problem is determined not only by the significant prevalence
of diabetes in the population, but also the rapid
development of complications that lead to reduced quality
of life, early disability and premature death [10, 21, 24].
According to literature sources, among the complications
of diabetes today are sufficiently described nephro- and