摘要目的 探讨RhoA/ROCK-2在阻塞性睡眠呼吸暂停低通气综合征(OSAHS)患者肺动脉高压(PH)形成中的作用.方法 选择经全夜多导睡眠监测确诊的30例OSAHS患者作为实验组,同时选择与之性别、年龄、体重指数(BMI)相匹配的健康志愿者15名作为对照组;行彩色多普勒超声心动图测定肺动脉压力(PAP);检测血清RhoA/ROCK-2含量.结果 OSAHS组PAP水平[OSAHS患者合并PH组为(47.30±12.85)mm Hg、OSAHS患者未合并PH组为(22.31±3.07)mm Hg]高于对照组[(19.47±1.92)mm Hg],差异有统计学意义(W=175.50,P<0.05);OSAHS未合并PH者血清RhoA和ROCK-2水平[分别为(10.43±3.10)、(22.31±16.10)μg/L]明显高于对照组[(2.94±1.20)、(6.04±0.28)μg/L],差异有统计学意义(W=120.00,W=121.00,P均<0.05);OSAHS未合并PH者血清RhoA/ROCK-2水平低于OSAHS合并PH者[(14.85±8.49)、(36.81±12.69)μg/L],但仍高于对照组,差异有统计学意义(H=29.172,H=30.242,P均<0.05);相关分析显示OSAHS组无论是合并PH还是未合并PH,PAP和睡眠呼吸暂停低通气指数均呈正相关(r_s=0.793,r_s=0.887,P均<0.05),最低动脉血氧饱和度和PAP呈负相关(r_s=-0.562,r_s=-0.751,P均<0.05),血清RhoA/ROCK-2水平均与PAP呈正相关(r_s=0.793,r_s=0.887,P均<0.05),RhoA和ROCK-2水平亦呈正相关(r_s=1.000,r_s=1.000,P均<0.05).结论 OSAHS为肺动脉高压发生的独立危险因素,并且RhoA/ROCK-2通路可能在OSAHS患者肺动脉高压的形成中起重要作用.

abstractsObjective To investigate the role of RhoA/Rho associated kinase-2 (RhoA/ROCK-2) in the development of pulmonary hypertension (PH) in patients with obstructive sleep apnea-hypopnea syndrome (OS-AHS). Methods Thirty patients diagnosed as OSAHS by polysomnograshy(PSG) test in our sleep laberatoty were recruited as the observation group, and fifteen healthy subjects matched in gender, age and body mass index (BMI) were recruited as the controls. Pulmonary arterial pressure was measured by echocardiography. Serum RhoA/ROCK-2 levels were measured. Results The level of PAP was (47.30±12.85)mm Hg in OSAHA patients complicated with PH, (22.31±3.07)mm Hg in OSAHA patients without PH, which were significantly higher than that in the controls (19.47±1.92) mm Hg (W=175.50, P < 0.05). The serum RhoA and ROCK-2 in OSAHA patients with-out PH (10.43±3.10 and 22.31±16.10 μ/L, respectively) were significantly higher those in the controls (2.94±1.20)μg/L and (6.04±0.28)μg/L, respectively) (W=120.00, W= 121.00, respectively, P<0.05), whereas significantly lower than that in OSAHA patients complicated with PH(14.85±8.49)μg/L, (36.81±12.69) μg/L, respectively) (H =29.172, H =30.242, respectively, P <0.05). There was a positive correlation between PAP and AHI in patients with OSAHS, whether complicated with PH or not(r_s=0.793, r_s=0.887,P <0.05), and there was a negative correlation between PAP and LSaO2 in patients with OSAHS (r_s=-0. 562,r_s = -0.751, P <0.05). There were positive correlations between the level of RboA/ROCK-2 and PAP in patients with OSAHS(r_s = 0.793,r_s = 0.887,P < 0.05). Finally, there was a positive correlation between the level of RhoA and ROCK-2 in patients with OSAHS (r_s = 1.000,r_s = 1.000,P < 0.05). Conclusions OSAHS is an inde-pendent risk factor for pulmonary hypertension. The levels of serum RhoA/ROCK-2 in OSAHS patients with PH were increased in the development of the disease. It may play an important role in the process of pulmonary hyper-tension in patients with OSAHS.