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Феноменология панкреатического эпителия при повреждении поджелудочной железы в эксперименте

Феноменология панкреатического эпителия при повреждении поджелудочной железы в эксперименте

Abstract

Changes in pancreatic epithelium have been studied using a regeneration model after partial pancreatectromy in rats, as result of which the part of the splenic portion of the pancreas was surgically removed (“longitudinal resection of the splenic portion of the pancreas”). During the early stages, zone adjacent to injury area showed de-differentiation of pancreatic epithelium. The epithelial fraction of pancretic tissue consists of duct-like tubular complexes, or “epithelial tubules”, structurally similar to ductal epithelium. Its cells actively incorporate labeled DNA-precursor 3H-thymidine with subsequent cell division. Furthermore, the epithelium of the regenerating tissue enters the stage of “secondary differentiation”, at which typical acini and typical pancreatic islets appear. 30 days after partial pancreatectomy, in the areas of pancreas non-adjacent to the injury, the total islet volume has increased by 61 percent. The article presents the data of ultrastructural changes in various parts of pancreatic epithelium under experimental conditions as well as lightand electron microscopic phenomenology of pancreatic “mixed” cells.

В качестве модели для изучения изменений в эпителии поджелудочной железы (ПЖ) в ответ на повреждение использована модель регенерации после частичной панкреатэктомии у крысы (продольная резекция селезеночного отдела железы). В области ПЖ, прилежащей к месту резекции, на ранних сроках развиваются процессы дедифференцировки панкреатического эпителия и формируется регенерат, эпителиальными составляющими которого являются в основном «эпителиальные трубки». Клетки регенерата активно включают меченый предшественник ДНК и делятся. Далее эпителий регенерата вступает в этап «вторичной дифференцировки», характеризующийся формированием в составе эпителиальных трубок типичных концевых отделов и панкреатических островков. В отдаленной от места резекции части ПЖ через 30 сут опыта возрастает объем островковой ткани (+61%). Приведены данные, характеризующие ультраструктурные изменения в различных отделах эпителия поджелудочной железы в условиях проведенного эксперимента, а также световая и электронномикроскопическая феноменология «смешанных» клеток панкреатического эпителия.

Keywords

ЧАСТИЧНАЯ ПАНКРЕАТЭКТОМИЯ, ДЕДИФФЕРЕНЦИРОВКА, РЕГЕНЕРАЦИЯ, ВТОРИЧНАЯ ДИФФЕРЕНЦИРОВКА, МОРФОМЕТРИЯ, УЛЬТРАСТРУКТУРА, «СМЕШАННЫЕ КЛЕТКИ», “MIXED” CELLS

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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