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以大鼠１８Ｓ－ＲＮＡ为内参照，用定量反转录聚合酶链式反应（ＱＲＴ－ＰＣＲ）技术对对２０只经过１２周耐力训练的ＳＤ大鼠心肌中ＭＬＣ－２基因的表达进行了研究。结果表明，与安静对照组相比，耐力训练组大鼠心室中ＭＬＣ－２基因的表达虽有升高，但无显著性统计学意义（ｐ＞ ０．０５）；同样，训练组大鼠心房中ＭＩＬ－ ２基因的表达较对照组也有非显著性升高（ｐ＞ ０．０５）。研究结果提示，耐力训练１２周时运动心脏中ＭＬＣ－２基因尚无显著表达。心室和心房中ＭＬＣ－２基因的表达与运动心脏发生的时相性是否有关还有待进一步研究。
Using 18S-RNA as an internal control, the expression of MLC-2 gene in 20 myocardium of 12 SD rats after 12-week endurance training was studied by quantitative reverse transcription-polymerase chain reaction (QRT-PCR) . The results showed that, compared with the quiet control group, endurance training group rats ventricular MLD-2 gene expression despite the increase, but no statistically significant (p> 0.05); Similarly, training group rats atrial The expression of MIL-2 in non-significantly increased than the control group (p> 0.05). The results suggest that there is no significant expression of MLC-2 gene in exercise heart at endurance training for 12 weeks. Whether the expression of MLC-2 gene in the ventricle and atrium is related to the time phase of exercise heart remains to be further studied.