摘要
研究不同剂量苯丙酮酸对C57BL/6J雄性小鼠焦虑抑郁行为和运动能力的影响。将24只8周龄C57BL/6J雄性小鼠随机分为3组,分别在普通日粮中添加0,0.2%和0.4%的苯丙酮酸饲喂7周。利用旷场试验(Open field test,OFT)、高架十字迷宫试验(High plus maze,EPM)和悬尾试验(Tail suspension test,TST)评价小鼠的焦虑抑郁行为;运用跑步机、抓力试验和网屏试验评价小鼠的运动能力。OFT结果表明,普通日粮添加0.2%或0.4%的苯丙酮酸都能显著延长小鼠中央区域的活动时间和距离,增加小鼠进入中央区域的次数,减少周边区域的活动时间、距离和因应激引起的排便次数(P<0.05)。EPM结果表明,苯丙酮酸显著增加小鼠进入开臂区域的次数,延长小鼠在开臂区域的活动时间(P<0.05)。TST结果表明,苯丙酮酸显著缩短小鼠的不动时间,延长其活动时间(P<0.05)。跑步试验、抓力试验和网屏试验结果表明,0.2%的苯丙酮酸能显著提高小鼠爪握力,增加其运动耐力和爆发力(P<0.05)。研究结果提示,日粮添加苯丙酮酸可以有效缓解小鼠的焦虑抑郁行为,提高小鼠的运动能力。
To investigate the effects of different doses of phenylpyruvate on anxiety,depression and exercise capacity in C57 BL/6 J male mice.Twenty-four C57 BL/6 J male mice,8 weeks old,were randomly divided into three groups,and 0,0.2% and 0.4% phenylpyruvate were added to the chow diet for 7 weeks.The open field test(OFT),the high plus maze(EPM)and the tail suspension test(TST)were used to evaluate the anxiety and depression behavior of mice;treadmills,grip tests and the screen test were used to evaluate the exercise capacity of the mice.The results of OFT showed that the addition of 0.2% or 0.4% phenylpyruvate to the chow diet significantly prolonged the activity time and distance in the central region of the mouse,increased the number of times the mouse entered the central region,reduced the activity time and distance in the surrounding area and number of bowel movements due to stress(P<0.05). EPM results showed that phenylpyruvate significantly increased open arm entry times,prolonged the activity time of the mice in the open arms region(P<0.05).TST results showed that phenylpyruvate significantly shortened the resting time of mice and prolonged their activity time(P<0.05).The results of running test,grip test and screen test showed that 0.2% phenylpyruvate could significantly increase the grip strength of mice and increase their exercise endurance and explosiveness(P<0.05). The results suggest that the chow diet supplementation of phenylpyruvate can effectively alleviate the anxiety and depression behavior of mice and improve the exercise capacity of mice.
引文
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