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Печень и регионарные лимфатические узлы крыс после воздействия высокой температуры

Печень и регионарные лимфатические узлы крыс после воздействия высокой температуры

Abstract

The purpose of this research was to study microand ultrastructural changes in the liver lymphatic region of Wistar rats over 3, 7 and 14 days after a single exposure of high temperature. In the liver at 3-day after an experimental hyperthermia (EH) the evidence of blood and lymph circulation abnormality, signs of destruction of blood-lymph barrier were revealed. These changes have led to the development of tissue hypoxia and, consequently, to the degeneration of hepatocytes, disruption of their functional activity. Significant violations persisted until the 14th day after exposure of EH in despite of the development of regenerative processes in the liver. The decrease in paracortex volume density has been found in liver lymph nodes to 7th day after EH, this fact is considered as suppression of T-dependent immune reactions. The increase of sizes of paracortical zone and germinative centers in hepatic lymph nodes and migration of lymphoid elements in liver parenchyma on 14th day after EH has been revealed; apparently, that testifies to the strengthening of protective function of all lymphoid system in reply to destabilizing influence of high temperature.

Целью исследования явилось изучение микрои ультраструктурных изменений в лимфатическом регионе печени крыс через 3, 7 и 14 суток после однократного воздействия высокой температуры. В печени на 3-и сутки после экспериментальной гипертермии (ЭГ) выявлены признаки нарушения кровои лимфообращения, разрушения гематолимфатического барьера. Эти изменения приводили к возникновению тканевой гипоксии и, как следствие, к дистрофии гепатоцитов, нарушению их функциональной активности. Несмотря на развитие восстановительных процессов в исследуемом органе, значительные нарушения сохранялись вплоть до 14-х суток после воздействия высокой температуры. В лимфатических узлах печени на 7-е сутки после ЭГ обнаружено уменьшение объемной плотности паракортекса, что расценивается как подавление Т-зависимых иммунных реакций. Выявленные нами на 14-е сутки после ЭГ увеличение размеров паракортикальной зоны и герминативных центров в печеночных лимфоузлах и миграция лимфоидных элементов в паренхиму печени, по-видимому, свидетельствуют об усилении протективной функции всей лимфоидной системы на дестабилизирующее воздействие высокой температуры.

Keywords

ЭКСПЕРИМЕНТАЛЬНАЯ ГИПЕРТЕРМИЯ, ПЕЧЕНЬ, РЕГИОНАРНЫЕ ЛИМФАТИЧЕСКИЕ УЗЛЫ

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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
Average
Average