肝源性胆汁淤积大鼠扣带回皮层经元胞浆嗜色性及RNA含量的变化

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论证。胆汁淤积症是指胆汁淤积,导致其成分进入血液,对包括大脑在内的各种器官和系统产生毒性作用,并伴有认知和行为障碍。扣带回皮层负责情绪、学习和记忆。对大脑这一区域的研究将有助于了解这种病理中神经精神障碍的机制。同时,通过研究扣带回皮层神经元细胞质的嗜色性及其RNA含量,可以了解神经元及其蛋白质合成装置(含有RNA的核糖体)的形态功能状态和受损严重程度。

本研究旨在探讨胆汁淤积期大鼠大脑扣带回皮质中神经元细胞质的 RNA 含量和嗜色程度。

材料和方法。在结扎/切断总胆管或假手术(对照)后的不同时间,研究了大鼠腰皮质前(无颗粒)部的小细胞II层和大细胞V层的神经元。研究采用了组织学、组织化学、形态计量学和统计学方法。

结果。随着胆汁淤积的加剧,大鼠扣带回皮层神经元的结构和组织化学变化也随之增加。正常色素、高色素、高色素皱缩、低色素神经元和荫细胞的数量减少,保留的神经元中 RNA 含量降低。这些变化在横断胆总管后的第 10-20 天达到最大值。在存活的动物中,在术后第 45-90 天,保留下来的扣带皮层神经元的细胞质嗜色性和 RNA 含量逐渐恢复正常。胆汁淤积症神经元形态功能状态的紊乱在前扣带皮层小细胞层开始和结束的时间都比大细胞层早。

结论。随着大鼠胆汁淤积的增加,扣带回皮层神经元中正常色素细胞的数量减少,神经元的数量增加,细胞质嗜色性发生变化,其中RNA含量降低。这表明神经元及其蛋白质合成能力出现了严重的形态功能紊乱。随着保留神经元中胆汁淤积的消除,研究参数逐渐恢复正常,这证实了大鼠大脑神经元的高适应能力。

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作者简介

Tatiana V. Klimuts

Grodno State Medical University

编辑信件的主要联系方式.
Email: klimuts@yandex.ru
ORCID iD: 0009-0001-5670-9030
白俄罗斯, Grodno

Anastasiya V. Zaerko

Grodno State Medical University

Email: wersall_91@mail.ru
ORCID iD: 0000-0001-6155-040X

Cand. Sci. (Biology), Assistant Professor

白俄罗斯, Grodno

Sergey V. Emelyanchik

Yanka Kupala State University of Grodno

Email: semel@grsu.by
ORCID iD: 0009-0009-3032-8203

Dr. Sci. (Biology), Assistant Professor

白俄罗斯, Grodno

Sergey M. Zimatkin

Grodno State Medical University

Email: smzimatkin@mail.ru
ORCID iD: 0000-0001-5728-2588
SPIN 代码: 3592-5636

Dr. Sci. (Biology), Professor

白俄罗斯, Grodno

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1. JATS XML
2. Fig. 1. Neurons of the II (small cell) layer of the cingulate cortex of the rat brain on the 5th day (a) and 10th day in the control group (b); 5th day of cholestasis (c–e); on the 10th day of cholestasis (d–f). 1 ― normochromic; 2 ― hyperchromic; 3 ― hyperchromic shriveled neurons; 4 ― hypochromic neurons; 5 ― shadow cells; 6 ― satellitosis; 7 ― neuronophagy. Staining using the Nissl method, ×1000.

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3. Fig. 2. Percentage of the number of neurons with different cytoplasmic chromatophily in the II, small cells layer of the cingulate cortex.

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4. Fig. 3. RNA content in neurons of the II (small cell) layer of the rat cingulate cortex on the 10th day after surgery in the control (a) and experimental group (b). Einarson staining, ×1000.

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5. Fig. 4. Neurons of the V (magnocellular) layer of the cingulate cortex of the rat brain on the 10th day (a) and on the 20th day in the control group (b); on the 10th (c–e) and 20th day of cholestasis (d–f). 1 ― normochromic; 2 ― hyperchromic; 3 ― hyperchromatic shriveled neurons; 4 ― hypochromic neurons; 5 ― shadow cells; 6 ― satellitetosis. Staining using the Nissl method, ×1000.

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6. Fig. 5. Percentage of the number of neurons with different cytoplasmic chromatophily in the V layer of the cingulate cortex.

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7. Fig. 6. RNA content in neurons of the V (magnocellular) layer of the cingulate cortex of rats in the control group (a) and the experimental group (b) on the 20th day of the experiment. Einarson staining, ×1000.

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