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Journal of Southern Medical University ›› 2004, Vol. 24 ›› Issue (08): 922-925.

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Changes of energy metabolism in canine respiratory muscles after phrenic nerve transection

TIAN Jian-chang1, CHEN Gang2, XIAO Fei3, MA Jun-jie1, CAI Rui-jun2   

  1. 1. 解放军371医院胸心外科, 河南, 新乡, 453000;
    2. 第一军医大学南方医院胸心外科, 广东, 广州, 510515;
    3. 第一军医大学珠江医院胸心外科, 510282
  • Online:2004-08-20 Published:2004-08-20

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Abstract: Objective To examine the changes in energy metabolism in the respiratory muscles of canines with unilateral phrenic nerve transection using high-performance liquid chromatography (HPLC). Methods The left phrenic nerve of 8 canines was transected and the contents of adenine nucleotide in respiratory muscles were determined by HPLC before and 1 and 2 months after the operation. Results In the intercostal muscles, ATP contents remained almost unchanged during the entire course of the observation, while ADP content was elevated 2 months after the operation as compared with that measured before and 1 month after the operation (P<0.05). One month postoperatively, the content of total adenylic acid (TAN) decreased to the lowest point, but the difference between the measurements was not statistically significant; also at 1 month after the operation, the content of adenylate energy charge (AEC) was the lowest, with statistically significant difference from the measurements before and 2 months after the operation (P<0.05). In the diaphragm, the contents of ATP, ADP, TAN and AEC 2 months postoperatively were 9.05±12.70,2.99±2.57,14.72±13.98,0.57±0.29 from the levels at the other two time points (P<0.05). Conclusion After unilateral phrenic nerve transection in canines, the energy metabolism of the diaphragm declines significantly, whereas that of the intercostal muscle can be compensated to some extent.

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