低温对心肌细胞形态变化及细胞间相互作用影响的实验初探
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国家自然科学基金(10572017)资助项目


Study of the morphological changes and cells interaction in cardiomyocytes at low temperature
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    摘要:

    目的研究低温条件下心肌细胞形态调节趋向。方法运用低温培养(4℃)和常温培养(37℃)相比较的方法对心肌细胞形态变化及群体细胞间相互作用关系变化过程进行连续定点的显微观察,并运用计算机图像处理技术和统计学方法采集和分析数据,以观察心肌细胞在4牎低温条件下不同培养阶段细胞形态变化及细胞空洞变化的特征。结果(1)低温培养初期,心肌细胞出现明显的收缩行为,并伴有细胞间间隙产生,且间隙取向与细胞长轴一致;(2)低温培养中期,融合细胞层出现椭圆和圆形空洞,空洞周边细胞一部分被拉成细长形,一部分缩短成近方形;(3)低温培养后期,细胞间空洞形态、大小及分布趋于一致,细胞外形调整呈杆状;结论(1)低温可能通过诱发细胞收缩破坏细胞连接而造成组织损伤;(2)低温条件下心肌细胞可通过形变调整和细胞与细胞间连接形式调整实现整体结构稳定性的最大化。

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    Objective To investigate the adjustive tendency of cardiomyocytes’ morphological changes at low temperature. Method Compared the morphological changes of mcardiomyotytes cultured in low temperature (4 oC) with which cultured in normal temperature(37 oC), and detected cells’ interactions among cell colonies with inverted phase contrast microscope. Data were analyzed by imagine tool and mathematical statistic principles. Result (1) At the initial stages of low temperature culturing, cells assume obvious contraction with cell-cell clearance among cultured confluent cells and the orientation of clearances consistent with cell’s long axis; (2) at metaphase, present rounded or elliptical holes among the confluent cardiomyotytes; (3) at anaphase, the morphology, size and distribution of tensional holes tend to identical and cells turn to shank shape. Conclusion (1) low temperature may induce cells contract, destroy the cell-cell connection and result in histopathology; (2) Through the morphological changes and the cell-cell connective form’s regulation,Cardiomyocytes maximized the stabilization of the whole structure at low temperatures.

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王红兵,邓小燕,汤振宇,蒋红兵,刘灵.低温对心肌细胞形态变化及细胞间相互作用影响的实验初探[J].医用生物力学,2006,21(4):267-271

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