黄连水提物对秀丽隐杆线虫毒性效应评价

Toxicity evaluation of water extracts of Coptidis Rhizoma on Caenorhabditis elegans

目的评价不同质量浓度黄连水提物对秀丽隐杆线虫的毒性效应。方法制备黄连水提物,以秀丽隐杆线虫为模式生物,通过测定不同质量浓度的黄连水提物对秀丽隐杆线虫死亡率、最长寿命与半数致死时间、个体发育、产卵数和运动行为的影响,评价黄连水提物对秀丽隐杆线虫的毒性效应。结果与对照组相比,黄连水提物0.5、1.0、2.5 mg/mL可使秀丽隐杆线虫的死亡率显著提高(P<0.01),最长寿命与半数致死时间显著降低(P<0.01);在个体发育方面,黄连水提物1.0、2.5 mg/mL能显著抑制线虫生长(P<0.01);生殖行为方面,3个质量浓度的黄连水提物均能显著降低秀丽隐杆线虫产卵数(P<0.001),且具有一定的浓度依赖性;在运动行为方面,3个质量浓度的黄连水提物均能显著降低秀丽隐杆线虫头部摆动频率(P<0.01),黄连水提物0.5、1.0 mg/mL组线虫身体弯曲频率无显著性差异,黄连水提物2.5 mg/mL组线虫身体弯曲频率极显著降低(P<0.01);3个质量浓度的黄连水提物组线虫向前摆动、向后摆动和Omega/U摆动频率均无显著性差异。结论黄连水提物对秀丽隐杆线虫具有明显的毒性作用,为以秀丽隐杆线虫为模式生物评价黄连不同炮制品毒性提供了依据,为中药毒性的生物评价提供了新的思路和方法。

Objective To evaluate the toxic effects of different concentrations of Coptidis Rhizoma extract on Caenorhabditis elegans. Methods Coptidis Rhizoma was extracted by water, and then selected some indicators to evaluate the toxic effects of Coptidis Rhizoma by using C. elegans as model organism. The effects of different concentrations of water extracts of Coptidis Rhizoma on lethality, maximum lifespan and median lethal time, individual development, spawning number and locomotion behavior were measured to evaluate the toxic effects on C. elegans. Results Compared with the control group, the lethality of C. elegans was significantly increased by water extracts of Coptidis Rhizoma at 0.5, 1.0, and 2.5 mg/mL （P 〈 0.01）, and maximum lifespan and median lethal time were significantly decreased （P 〈 0.01）. In the aspect of individual development, Coptidis Rhizoma extract at 1.0 and 2.5 mg/mL significantly inhibited the growth of C. elegans （P 〈 0.01）. Three concentration extracts could significantly reduce the number of spawning in a certain dose-dependent manner in the aspect of reproductive behavior （P 〈 0.001）, and the head swing frequency of C. elegans （P 〈 0.01） in the aspect of locomotion behavior, respectively. There was no significant difference in body bending frequency between the 0.5 and 1.0 mg/mL exposed group, of which the lowest bending frequency was 2.5 mg/mL exposed group （P 〈 0.01）. There was no significant difference in the frequency of forward swing, backward swing and Omega/U swing of three exposed groups. Conclusion The water extracts of Coptidis Rhizoma had obvious toxic effects on C. elegans, which provided the basis for the biological evaluation of the toxicity of different processed products of Coptidis Rhizoma by using C. elegans as a model organism, and provided new ideas and methods for the biological assessment of toxicity of Chinese medicinal materials.