One of the factors for arterial hypertension development is an increase in the activity of the renin-angiotensin-aldosterone system. It is supposed to be relevant to study the structure of subcortical and perimedullary nephrons in order to identify their morphofunctional characteristics in postnatal ontogenesis.
The aim of the study was to investigate the age-related characteristics of the renal cortex structure in children of different age groups.
Materials and Methods. The study was performed on the autopsy renal material obtained from children without any vascular and renoparenchymal diseases, who died at the age of 2 months – 10 years. Six age groups were identified: those who died at the age of 2–4 months, 6–9 months, 10–12 months, 3 years, 6 years, and 10 years. Paraffin microscope slides were prepared according to a standard method and stained with hematoxylin and eosin. The authors determined the number of subcortical and perimedullary renal corpuscles, cortical and perimedullary nephron area, glomeruli area of subcortical and perimedullary nephrons and their average capsule area using the Levenhuk morphometric program.
Results. In postnatal ontogenesis, uneven maturation of the cortical renal substance is observed. Initially, the nephrons of the subcapsular zone develop faster, with predominant growth of convoluted tubules. Nephron number in the perimedullary zone is lower than in the subcortical one. Active tubule and stroma growth is observed since the age of 3. By the age of 10, the number of subcortical and perimedullary nephrons becomes the same and corresponds to the kidney structure in adults. In ontogenesis, the corpuscles and vascular glomeruli of the pericerebral nephrons are larger than those of the subcapsular ones. However, the urinary space is wider in the subcapsular nephrons, which indicates their earlier involvement in the urination process. A significant development of the vascular glomeruli of the perimedullary nephrons indicates their predominant involvement in the processes of blood pressure regulation through renin synthesis.
ЦЕЛЬ: оценка реальной суточной потребности в самоконтроле гликемии у больных сахарным диабетом 1 типа (СД1) на помповой инсулинотерапии при использовании системы непрерывного флэш мониторирования гликемии.МАТЕРИАЛЫ И МЕТОДЫ: исследование проводилось на базе отделения терапевтической эндокринологии ГБУЗ МО МОНИКИ имени М.Ф. Владимирского в течение от 4 до 15 дней (первый и последний дни были исключены из анализа (неполные дни работы датчика)). В исследовании приняли участие 58 взрослых больных СД 1 типа (34 -женщины, 24 -мужчины, в возрасте от 18 до 70 лет (средний возраст 34,1±10,9 лет), продолжительность сахарного диабета от 1 года до 57 лет (средняя продолжительность -13,1±10,2 лет)), находящихся на помповой инсулинотерапии. Пациентам была установлена система непрерывного флэш мониторирования глюкозы (FreeStyle Libre) после подписания информированного согласия и прохождения обучения принципам и правилам работы системы. В рамках исследования пациенты были не ограничены в частоте сканирования гликемии с помощью системы непрерывного флэш мониторирования в течение дня и проводили измерение уровня глюкозы крови так часто, как считали необходимым после чего была проведена ретроспективная оценка частоты сканирований гликемии в сутки.
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