CAJ | 학술논문

观察幼年大鼠发生肺炎时右心室心肌细胞膜L型Ca2+通道电流，研究肺炎合并心力衰竭时心肌细胞钙代谢改变。取50日龄Wistar大鼠，分别经气管注入金黄色葡萄球菌和无菌生理盐水，建立肺炎模型和对照。急性酶解分离出右室心肌细胞，采用全细胞式膜片钳方法，对接种后24h、120h的肺炎组和相应对照组分别记录右室心肌细胞L型Ca2+通道电流。24h肺炎组心肌细胞L型Ca2+通道电流大小无显著改变，而120h肺炎组通道电流显著增大，两组电流曲线的峰电位和激活电位均无改变。实验表明，肺炎早期右室心肌细胞膜L型Ca2+通道电流无明显改变，中后期明显增大，整个观测期间肺炎对该通道基本属性无明显影响。
관찰유년대서발생폐염시우심실심기세포막L형Ca2+통도전류，연구폐염합병심력쇠갈시심기세포개대사개변。취50일령Wistar대서，분별경기관주입금황색포도구균화무균생리염수，건립폐염모형화대조。급성매해분리출우실심기세포，채용전세포식막편겸방법，대접충후24h、120h적폐염조화상응대조조분별기록우실심기세포L형Ca2+통도전류。24h폐염조심기세포L형Ca2+통도전류대소무현저개변，이120h폐염조통도전류현저증대，량조전류곡선적봉전위화격활전위균무개변。실험표명，폐염조기우실심기세포막L형Ca2+통도전류무명현개변，중후기명현증대，정개관측기간폐염대해통도기본속성무명현영향。
To probe the myocardial calcium metabolism during heart failure subsequent to acute pneumonia, the L-type Ca2+ current through the right ventricular myocyte membrane of juvenile rat pneumonia models was recored. 50-day old Wister rats were given via trachea staphylococci aureus or sterile normal saline as control. Right ventricular myocytes were enzymatically isolated and L-type Ca2+ currents were recorded with the whole-cell clamp technique. The results showed that the currents were not significantly changed 24 hours after staphylococci aureus administration but were significantly augmented 120 hours after staphylococci aureus administration.No change was found in peak potential and activation potential. It is concluded that L-type Ca2+ currents of right ventricular myocytes don′t change during early stage of acute pneumonia but are augmented during later period. And pneumonia has little effect on peak potential and activation potential.