The Effects of Hindlimb Unloading of Rats on Rheographic Parameters of Femoral and Brachial Arteries In Situ.

IF 0.9 4区医学 Q4 MEDICINE, RESEARCH & EXPERIMENTAL

Bulletin of Experimental Biology and Medicine Pub Date : 2024-11-22 DOI:10.1007/s10517-024-06276-9

L N Tikhomirova, Yu S Medvedeva, M A Lebedeva, I Yu Gavrilov, S V Revenko, M Yu Karganov, E G Popov, I A Tarakanov

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Abstract

The rheographic parameters of the segments of brachial and femoral arteries were measured in situ after a 14-day-long hindlimb unloading (HU) of rats. HU significantly increased electrical impedance Z of a segment of femoral artery indicating its constriction; in parallel, HU resulted in a decreasing trend of Z of a segment of brachial artery attesting to its dilation. In both arteries, HU significantly or as a trend decreased the swing ranges of active and passive pulsations, respectively. BP reduction during bloodletting induced transition from passive to active pulsatile mode in the femoral artery only in 33% experimental rats in contrast to 87% control ones. We suppose that degradation of active pulsatile mode is responsible for the negative influences of microgravity and weightlessness on blood circulation. The study determined the rheographic parameters that reliably reflect changes in the functional activity of arteries after chronic redistribution of hydrostatic load.

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大鼠后肢卸载对股动脉和肱动脉原位流变学参数的影响

在对大鼠进行长达 14 天的后肢负重（HU）后，对肱动脉和股动脉的流变学参数进行了原位测量。HU明显增加了股动脉一段的电阻抗Z，表明其收缩；与此同时，HU导致肱动脉一段的Z呈下降趋势，证明其扩张。在这两种动脉中，HU 分别显著或呈趋势地降低了主动和被动搏动的摆动范围。放血过程中血压降低导致股动脉从被动搏动模式过渡到主动搏动模式的实验鼠仅占 33%，而对照组则占 87%。我们认为，主动搏动模式的退化是微重力和失重对血液循环产生负面影响的原因。该研究确定了流变学参数，这些参数能可靠地反映动脉在长期静水负荷再分配后的功能活动变化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Bulletin of Experimental Biology and Medicine 医学-医学：研究与实验

CiteScore

1.50

自引率

14.30%

发文量

265

审稿时长

2 months

期刊介绍： Bulletin of Experimental Biology and Medicine presents original peer reviewed research papers and brief reports on priority new research results in physiology, biochemistry, biophysics, pharmacology, immunology, microbiology, genetics, oncology, etc. Novel trends in science are covered in new sections of the journal - Biogerontology and Human Ecology - that first appeared in 2005. World scientific interest in stem cells prompted inclusion into Bulletin of Experimental Biology and Medicine a quarterly scientific journal Cell Technologies in Biology and Medicine (a new Russian Academy of Medical Sciences publication since 2005). It publishes only original papers from the leading research institutions on molecular biology of stem and progenitor cells, stem cell as the basis of gene therapy, molecular language of cell-to-cell communication, cytokines, chemokines, growth and other factors, pilot projects on clinical use of stem and progenitor cells. The Russian Volume Year is published in English from April.