首页> 外文期刊>Laser Physics: An International Journal devoted to Theoretical and Experimental Laser Research and Application >Effects of low-intensity laser irradiation on the apoptosis of rabbit vascular smooth muscle cells in culture
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Effects of low-intensity laser irradiation on the apoptosis of rabbit vascular smooth muscle cells in culture

机译:低强度激光照射对培养兔血管平滑肌细胞凋亡的影响

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摘要

Restenosis is a major complication after coronary intervention therapy. Excessive proliferation of vascular smooth muscle cells (VSMCs) and a decline in their apoptosis, which eventually leads to excessive neointimal thickening in coronary arteries, are the main causes of restenosis. Induction of the apoptosis of VSMCs and inhibition of excessive proliferation of VSMCs are therefore crucial for the prevention of restenosis, and low-intensity laser irradiation of coronary arteries may play a promising role in keeping this in balance. In this study, we used in vitro cultured rabbit VSMCs to investigate the effects of low-intensity laser irradiation at a wavelength of 532 nm on the apoptosis of VSMCs via morphological observation and molecular biology. The results showed that apoptotic bodies and obvious intranuclear apoptosis-positive particles formed within VSMCs 24 h after laser irradiation, suggesting that low-intensity laser irradiation at certain doses can inhibit the proliferation of VSMCs by promoting their apoptosis. This experiment provides evidences for further animal experiments and clinical trials on prevention and treatment of restenosis by intracoronary low-intensity laser irradiation at a wavelength of 532 nm.
机译:再狭窄是冠状动脉介入治疗后的主要并发症。再狭窄的主要原因是血管平滑肌细胞(VSMC)过度增殖和凋亡减少,最终导致冠状动脉新内膜过度增厚。因此,诱导VSMC的凋亡和抑制VSMC的过度增殖对于预防再狭窄至关重要,而低强度的冠状动脉激光照射可能在保持这种平衡方面起着有希望的作用。在这项研究中,我们使用体外培养的兔VSMC通过形态学观察和分子生物学研究了532 nm波长的低强度激光照射对VSMC凋亡的影响。结果表明,激光照射后24 h内,VSMC内有凋亡小体和明显的核内凋亡阳性颗粒形成,提示一定剂量的低强度激光照射可以促进VSMCs的凋亡,抑制其增殖。该实验为进一步的动物实验和临床试验提供了证据,以通过冠状动脉内低强度激光照射波长为532 nm的预防和治疗再狭窄。

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