摘要
目的探讨参麦注射液(SMI)对慢性间歇性缺氧大鼠胸骨舌骨肌收缩性能的影响。方法健康雄性SD大鼠30只,单纯随机抽样分为正常对照组(A组)、慢性间歇性缺氧组(B组)和参麦药物干预组(C组),对B、C组大鼠间歇缺氧(8h/d,5周)以模拟阻塞性睡眠呼吸暂停低通气综合征(OSAHS)患者慢性间歇性缺氧的特征。采用电刺激法测定等长收缩胸骨舌骨肌肌条在不同刺激频率下收缩性能的变化。结果(1)B组大鼠胸骨舌骨肌在10~100Hz的电刺激频率下的肌张力分别为(19.5±4.7)、(23.8±4.7)、(33.0±5.1)、(45.1±5.9)、(54.2±7.0)、(66.1±9.1)、(74.2±9.1)、(79.7±9.0)、(82.0±8.4)、(80.7±11.8)g/cm2,与A组比较差异均无统计学意义[A组肌张力分别为(23.2±5.6)、(26.2±5.0)、(35.1±5.4)、(46.0±8.5)、(57.0±9.9)、(69.9±9.7)、(79.2±9.5)、(85.7±7.6)、(87.9±7.9)、(86.6±12.4)g/cm2,P均>0.05];与C组比较差异均有统计学意义[(30.5±2.3)、(40.0±5.4)、(56.2±7.6)、(72.2±6.4)、(82.0±5.5)、(92.4±4.6)、(98.1±4.0)、(99.2±7.4)、(101.8±3.9)、(102.2±4.0)g/cm2,P均<0.05]。(2)在诱导疲劳试验中,B组大鼠胸骨舌骨肌1~5min张力百分比分别为(75.6±8.5)%、(41.6±7.3)%、(29.0±2.7)%、(20.4±2.9)%、(18.5±2.5)%,与A组同时间点比较差异均有统计学意义[(87.9±5.7)%、(72.1±11.5)%、(55.6±9.6)%、(39.7±10.7)%、(33.2±10.2)%,P均<0.05],与C组比较差异均有统计学意义[(87.9±4.4)%、(67.9±14.1)%、(48.4±9.9)%、(38.2±7.0)%、(33.8±9.3)%,P均<0.05]。结论慢性间歇性缺氧能够增加上气道肌的疲劳,SMI具有显著增强上气道肌收缩力和抵抗疲劳的作用。
Objective To investigate the effect of Shen-Mai injection (SMI) on sternohyoid contractile properties in rats with chronic intermittent hypoxia. Methods Thirty healthy male SD rats were randomly assigned to three equal groups, the control group (A group) ,the chronic intermittent hypoxia group ( B group) and the SMI group( C group). Rats in B group and C group were exposed to alternating periods of hypoxia and normoxia once per minute for 8 h/d for 5 weeks in order to mimic the intermittent hypoxia of obstructive sleep apnea-hypopnea syndrome (OSAHS) in humans. Isometric contractile prope/ties were determined by electrostimulating the strips of isolated sternohyoid muscles at different frequencies (from 10 Hz to 100 Hz) to observe the changes of the sternohyoid contractile properties. Results (1)The tension of sternohyoid muscle in A group at different frequencies was ( 23. 2 ± 5. 6 ), ( 26. 2 ± 5.0 ), ( 35. 1 ± 5.4 ), (46.0±8.5),(57.0±9.9),(69.9±9.7),(79.2±9.5),(85.7±7.6),(87.9±7.9),and (86.6± 12. 4) g/cm2. The tension of sternohyoid muscle in B group[ ( 19. 5 ± 4. 7 ) , ( 23. 8 ± 4. 7 ) , ( 33.0 ± 5. 1 ) , (45.1±5.9),(54.2±7.0),(66.1 ±9.1),(74.2±9.1),(79.7 ±9.0),(82.0±8.4),and (80.7± 11.8 ) g/cm^2 ] was not significantly different from those in A group respectively ( all P 〉 0. 05 ) ; while the tension of sternohyoid muscle in C group [ ( 30. 5 ± 2. 3 ) , ( 40. 0 ± 5.4 ) , ( 56. 2 ± 7. 6 ) , ( 72. 2 ± 6. 4 ) , (82. 0±5.5) ,(92.4 ±4.6) , (98. 1 ±4. 0), (99. 2 ±7.4) , (101.8 ± 3.9) ,and ( 102. 2 ±4.0)g/cm^2 ]was significantly different from those in B group respectively( all P 〈0. 05 ). (2)In fatigue test, the tension percentages of sternohyoid muscle in A group at 1,2,3,4, and 5 min were ( 87.9 ± 5.7 ) %, ( 72. 1 ± 11.5)%,(55.6 ±9.6)%,(39.7 ± 10.7)%,(33.2 ± 10.2)%. Compared with A group,the tension percentages of sternohyoid muscle in B group at 1,2,3,4, and 5 min[ ( 75.6 ± 8.5 ) %, ( 41.6 ± 7. 3 ) %, ( 29.0 ± 2.7 ) % , ( 20. 4 ± 2.9) %, ( 18. 5 ±2.5 ) %, respectively ] decreased significantly ( all P 〈 0. 05 ). Compared with B group, the tension percentages of sternohyoid muscle in C group [ ( 87.9±4. 4 ) % , ( 67. 9±14. 1 ) %, ( 48.4±9. 9 ) %, ( 38. 2 ±7.0 ) %, ( 33.8±9. 3 ) % , respectively ] increased significantly ( all P 〈 0. 05 ). Conclusions Chronic intermittent hypoxia can increase upper airway muscle fatigue. SMI can significantly increase the contractile properties of upper airway muscle and resist the fatigue of upper airway muscle.
出处
《中华结核和呼吸杂志》
CAS
CSCD
北大核心
2005年第9期611-614,共4页
Chinese Journal of Tuberculosis and Respiratory Diseases
基金
国家自然科学基金资助项目(39670338)