LY294002可抑制VEGF和PlGF调控小鼠胎肝造血干细胞髓系分化的作用

 【目的】探讨内皮生长因子（VEGF）和胎盘生长因子（PlGF）对小鼠胎肝造血干细胞髓系分化的影响及其相关机制。【方法】体外培养E13胎肝造血细胞,培养造血集落CFU-GM,观察VEGF和PlGF对胎肝造血干细胞髓系分化的作用,应用MTT法来评估不同浓度的PI3-K/Akt抑制剂LY294002对胎肝造血细胞增殖的影响及其对VEGF和PlGF调控胎肝造血作用的影响, Western-Blot检测不同处理条件对胎肝造血细胞Akt蛋白以及p-Akt蛋白表达水平的影响。【结果】VEGF和PlGF均促进胎肝造血干细胞髓系分化,集落数分别为对照组的141%（P<0.05）和123%（P<0.05）;经PlGF处理的胎肝造血细胞后,p-Akt蛋白表达水平是对照组的143%（P<0.01）;VEGF和PlGF分别处理以及联合处理后,与对照组的总Akt蛋白表达水平相比,差异没有统计学意义。不同浓度的LY294002抑制胎肝造血细胞的增殖,并具有明显的剂量依赖性（r=0.9647,P<0.01）,LY294002可抑制VEGF和PlGF调控胎肝造血干祖细胞调控髓系分化的作用,集落数为单独存在时的11.5%（P<0.001）和14.5%（P<0.001）。【结论】VEGF和PlGF均能促进胎肝造血干细胞的髓系分化;PlGF可通过上调胎肝造血细胞Akt的磷酸化水平调节胎肝造血细胞的髓系分化。     

flk-1基因在胎肝造血细胞增殖中的调控作用

[目的]探讨flk-1基因在胎肝造血细胞体外扩增中的调控作用.[方法]体外培养E14胎肝造血细胞,应用Western-Blot检测flk-1配基VEGF及其抑制剂SU5416对E14胎肝造血细胞flk-1蛋白表达水平的影响,通过细胞计数、氚标胸腺嘧啶脱氧核苷掺入实验及细胞周期分析观察flk-1配基VEGF及其抑制剂SU5416对E14胎肝造血细胞增殖的影响,造血集落CFU-GM(colony-forming unit-granulocyte/macrophage粒-巨噬细胞系集落形成单位)培养检测造血祖细胞的功能状态.[结果]VEGF或VEGF加SU5416均可促进胎肝造血细胞的增殖,细胞数目分别为对照组的108%和142%,并且集落数量也显著增加,分别为对照组的159%和151%(P<0.01);单独应用SU5416使造血细胞的数目较对照组减少了8%,但集落产率与对照组无显著性差异.Western blot结果经统计学分析,S U5416组和VEGF加SU5416组flk-1蛋白表达强度分别为对照组的165%(P<0.01)和57%(P<0.05),与对照组相比有显著性差异.[结论]VEGF受体flk-1和flt-1均参与介导VEGF对胎肝造血细胞增殖的调控作用.SU5416阻断flk-1信号转导可上调flk-1的蛋白表达,flt-1活化可下调flk-1的蛋白表达.     

P13K抑制剂对肺癌Akt2、p-Akt表达影响的试验研究

目的探讨P13K抑制剂LY294002对肺癌Akt2、p-Akt表达的影响。方法体外实验是取对数生长期的A549细胞制备细胞爬片,体内实验先用裸鼠建立移植瘤模型,通过P13K抑制剂LY294002干预后,分别用免疫组织化学法和W estern b lot法检测Akt2、p-Akt蛋白的表达。结果肺腺癌细胞株A549细胞中存在Akt2和p-Akt蛋白的高表达,应用P13K抑制剂LY294002可抑制该细胞株细胞中Akt2和p-Akt蛋白的表达,而且其表达呈浓度依赖型降低。LY294002组移植瘤组织Akt2和p-Akt蛋白的表达用免疫组织化学法检测较对照组染色变淡,用W estern b lot法检测显示其蛋白表达量低于对照组。结论LY294002可通过抑制P13K活性,抑制Akt的表达及活化,使Akt2和p-Akt蛋白的表达降低,提示抑制P13K/Akt途径可能是LY294002发挥抗癌作用的重要机制,P13K/Akt可能成为肺癌治疗的靶点。     

紫花牡荆素对 H446细胞系肺癌干样细胞球形成能力和 p-Akt蛋白表达的影响

目的：研究紫花牡荆素（canstin,CAS）抑制人小细胞肺癌 H446细胞系肺癌干细胞样细胞球形成作用,探讨其作用机制是否涉及降低 Akt 磷酸化蛋白表达水平。方法：肿瘤球形成法获得 H446细胞系第2代球形成细胞,并检定 CAS、及与 LY294002合用对肿瘤球形成率的影响。Western blot 分析 p-Akt、Akt 蛋白表达。结果：CAS以浓度依赖方式降低 H446细胞系第2代球形成细胞肿瘤球形成率和 Akt 蛋白磷酸化水平。LY294002（5.0μmol/L）增强 CAS 抑制球形成以及下调 p-Akt 蛋白表达作用。结论：CAS 具有抑制 H446细胞系干细胞样细胞球形成作用;Akt 特异性抑制剂有效增强 CAS 抑制肺癌干细胞样细胞球形成与 Akt 蛋白磷酸化。     

重组人红细胞生成素对癫痫持续状态大鼠海马p-Akt和XIAP的影响

目的 观察重组人红细胞生成素(recombinant human EPO,rHuEPO)对戊四氮(Pentylenetetrazol,PTZ)点燃的癫痫持续状态(status epilepticus,SE)的SD大鼠海马神经元磷酸化蛋白激酶B(p-PKB/p-Akt)和X-连锁凋亡抑制蛋白(X-linked inhibtor of apoptosis protein,XIAP)表达的影响,应用磷脂酰肌醇3激酶(phosphatidyl inositol 3 kinase,P13K)抑制剂LY294002进一步探讨rHuEPO作用的可能机制.方法 采用PTZ制作大鼠SE模型,将点燃后的大鼠随机分为PTZ组(PTZ+NS)、rHuEPO组(PTZ+rHuEPO)、LY294002组(PTZ+LY294002+rHuEPO)、LY294002溶剂二甲基亚砜(DMSO)对照组(PTZ+DMSO+rHuEPO),正常对照组腹腔注射生理盐水(n=35).观察大鼠行为学和脑电图的改变;TUNEL法检测海马神经细胞的凋亡情况;免疫组织化学法观察p-Akt、XIAP的表达;RT-PCR法检测各组大鼠海马XIAPmRNA的表达;Western blot法检测各组大鼠海马Akt、P-Akt蛋白的表达.结果 正常对照组仅见少量凋亡细胞,p-Akt和XIAP阳性细胞、p-Akt蛋白、XIAP mRNA均有少量表达;PTZ组与rHuEPO组、LY294002组、LY294002溶剂DMSO对照组比较,p-Akt和XIAP阳性细胞数、P-Akt蛋白表达及XIAP mRNA表达均减少(P<0.05),凋亡细胞数增加(P<0.05);rHuEPO组、LY294002溶剂DMSO对照组与LY294002组比较,p-Akt和XIAP阳性细胞数、p-Akt蛋白表达及XIAP mRNA表达均增加(P<0.05),凋亡细胞数减少(P<0.05).结论 rHuEPO在SE模型中活化了PI3K/Akt,提高p-Akt蛋白的表达,进而对线粒体凋亡途径的相关调控因子XIAP的表达进行了调控,从而介导线粒体凋亡途经,发挥抗凋亡、促存活的神经保护作用.     

靶向抑制 PI3K 对PDK-1/Akt信号通路调控成骨细胞分化的影响

目的 通过观察磷脂酰肌醇3-激酶(PI3K)特异性抑制剂LY294002在成骨细胞分化过程中的影响,探讨PI3K通过调控PDK-1 /Akt信号通路对成骨细胞分化影响的分子机制。方法 采用体外培养C57BL/6小鼠骨髓间充质干细胞(BMSC)。通过CCK-8检测LY294002的最大安全浓度。对照组使用成骨细胞诱导培养基(OBM)处理BMSC,干预组在OBM中添加LY294002。检测两组细胞碱性磷酸酶（ALP）活性和细胞矿化能力,并分别采用Western-Blot和RT-PCR检测PDK-1 /Akt信号通路及下游蛋白和转录因子基因的表达水平。结果 CCK-8结果提示,在3.2 μM及以下浓度对BMSC的增殖没有影响;LY294002对成骨细胞分化的影响呈剂量依赖性（P＜0.05）;干预组ALP阳性细胞和细胞外基质矿化较对照组明显减少 (P＜0.05); Western-Blot 检测结果显示,干预组p-PDK 1和p-Akt蛋白表达水平较对照组明显降低 (P＜0.05);RT-PCR 结果提示,干预组成骨细胞相关基因ALP和骨钙素（OCN）mRNA较对照组表达明显下降 (P＜0.05)。结论 靶向抑制PI3K可通过PDK-1 /Akt信号通路明显下调成骨细胞相关基因ALP和OCN的表达,并抑制成骨细胞的分化。     

姜黄素对大鼠肾系膜细胞结缔组织生长因子表达的影响

目的 观察姜黄素对大鼠肾小球系膜细胞结缔组织生长因子（CTGF）表达的影响。并探讨其可能的影响机制。方法 体外培养大鼠肾系膜细胞．同步后用血清刺激，并用不同浓度的姜黄素、姜黄素联合mTOR特异阻断剂雷帕霉素、姜黄素和磷脂酰肌醇3激酶／蛋白激酶BCP13K／Akt）特异抑制剂LY294002进行干预处理。采用RT-PCR检测CTGF和纤维连接蛋白（Fn）mRNA表达；Western blot检测CTGF蛋白和磷酸化蛋白激酶B（p-Akt）表达。结果 ①血清刺激系膜细胞6h，姜黄素浓度依赖性抑制CTGF和Fn mRNA的表达；姜黄素联合雷帕霉素对CTGF和Fn mRNA表达的抑制作用较单用同浓度姜黄素明显；LY294002预处理后。姜黄素对CTGF和Fn mRNA表达的抑制作用较未预处理组减弱。②25／μmol／L姜黄素作用细胞30、120min。p-Akt蛋白表达较同时间点血清对照组明显减弱；且LY294002预处理后姜黄素对p-Akt表达的抑制作用较未预处理组亦明显减弱。③血清刺激系膜细胞24h。姜黄素对CTGF蛋白的表达亦起抑制作用；姜黄素联合雷帕霉素对CTGF蛋白表达抑制更明显；LY294002预处理后。姜黄素对CTGF蛋白表达的抑制效果较未预处理组减弱。结论 姜黄素可抑制血清刺激的肾小球系膜细胞CTGF的表达．其机制可能与P13K／Akt信号途径和mTOR信号途径有关。     

Ghrelin对脂肪间充质干细胞神经分化的影响

目的 探讨Ghrelin联合LY294002对脂肪间充质干细胞（ADSCs）神经分化的影响,并阐明其作用机制。 方法 倒置相差显微镜下观察ADSCs形态表现,流式细胞术鉴定ADSCs表面抗体阳性表达率,将第4代ADSCs分为对照组（不进行干预）、LY294002组［给予40 μmol·L^－1磷酸酰肌醇3激酶（PI3K）/蛋白激酶B（Akt）通路特异抑制剂LY294002］、Ghrelin组（给予0.1 μmol·L^－1 Ghrelin）、Ghrelin+LY294002组（给予40 μmol·L^－1 LY294002+0.1 μmol·L^－1 Ghrelin）。倒置相差显微镜下观察各组ADSCs神经分化后的形态表现,免疫荧光染色法检测各组ADSCs中神经元特异性烯醇化酶（NSE）、巢蛋白（Nestin）和胶质纤维酸性蛋白（GFAP）阳性细胞百分率,Western blotting法检测各组ADSCs中 PI3K/Akt通路蛋白表达水平,并计算磷酸化PI3K（p-PI3K）/PI3K和磷酸化Akt（p-Akt）/Akt比值。 结果 ADSCs表面抗体CD90和CD13高表达,CD34、CD45和CD106低表达。与对照组比较,LY294002组仅部分细胞由长梭形转变为类圆形胞体,突起较短、数量减少,而Ghrelin组细胞由长梭形转变为类圆形胞体速度增快;与LY294002组比较,Ghrelin+ LY294002组细胞由长梭形转变为类圆形胞体速度增快,且突起数量增加。与对照组比较,LY294002组ADSCs中NSE和Nestin阳性细胞百分率及p-PI3K/PI3K和p-Akt/Akt比值明显降低（P<0.05）,Ghrelin组ADSCs中NSE和Nestin阳性细胞百分率及p-PI3K/PI3K和p-Akt/Akt比值升高（P<0.05）;与LY294002组比较,Ghrelin+LY294002组ADSCs中NSE和Nestin阳性细胞百分率及p-PI3K/PI3K和p-Akt/Akt比值升高（P<0.05）;各组ADSCs中GFAP阳性细胞百分率比较差异无统计学意义（P>0.05）。 结论 Ghrelin通过激活PI3K/Akt通路促进ADSCs神经分化。     

肝癌干细胞样细胞的分离及其耐药性受PI3K/Akt通路调节

目的 分离肝癌干细胞样细胞,初步探讨PI3 K/Akt通路调节其对化疗药物阿霉素的敏感性.方法 将人肝癌细胞株PLC、HepG2、Hep3B置于无血清条件培养基中培养,形成细胞球,选用PLC细胞株进行后续实验.采用流式细胞仪、克隆形成实验、SCID小鼠体内成瘤实验鉴定PLC细胞球(肝癌干细胞样细胞)的肿瘤干细胞特性.MTT法、流式细胞仪测定PLC细胞球对化疗药物阿霉素的敏感性.流式细胞仪分析加入PI3 K/Akt通路特异性抑制剂LY294002、阿霉素共同孵育细胞球后,其凋亡率的变化.Western blot法比较PLC细胞球、PLC贴壁细胞中p-Akt1(Ser473)蛋白分子表达量及加入抑制剂LY294002作用于细胞球后,p-Akt1(Ser473)、Akt1蛋白分子表达量的变化.结果 肝癌干细胞标志物CD90在细胞球中的表达较贴壁细胞显著升高(P＜0.01).细胞球的克隆形成数目(123.00±28.48)为贴壁细胞(56.33±7.37)的2.18倍(P＜0.05).同样细胞数接种于SCID小鼠皮下7周后,细胞球的致瘤率明显大于贴壁细胞.以5μg/mL的阿霉素分别处理细胞球和贴壁细胞48 h后,细胞球的增殖率明显高于贴壁细胞[(71.83±12.30)％ vs (45.68±5.95)％,P ＜0.05],凋亡率显著低于贴壁细胞[(11.73 ±3.77)％ vs (41.22±6.73)％,P＜0.01],而以阿霉素5μg/mL和LY294002共同孵育细胞球后,其凋亡率[(35.44±6.65)％]显著增加(P＜0.01).Western blot检测到细胞球的p-Akt1(Ser473)蛋白分子表达量显著高于贴壁细胞(P＜0.01),加入抑制剂LY294002处理细胞球后,p-Akt1(Ser473)蛋白表达量明显降低(P＜0.05),Akt1的表达量无明显变化(P＞0.05).结论 肝癌干细胞样细胞对化疗药物阿霉素具有耐药性,其耐药机制与Akt信号通路第473位点磷酸化Akt1分子有关.     

厄贝沙坦对大鼠心肌缺血再灌注PI3K/Akt通路与细胞凋亡的影响

目的 观察厄贝沙坦对大鼠缺血再灌注心肌细胞凋亡的影响及其与PI3K/Akt通路的关系.方法 56只大鼠随机分为假手术(SH)组,缺血再灌注(I/R)组,厄贝沙坦组,厄贝沙坦+LY294002 (LY)组.厄贝沙坦灌胃一周后制作大鼠心肌缺血再灌注模型,LY294002于缺血前15 min尾静脉注射.实验结束后用TTC染色测定心肌梗死面积;免疫组化法检测心肌组织Bcl-2、Bax的蛋白表达;Western Blot法测定p-Akt的活性;TUNEL检测凋亡细胞指数(AI).结果 与I/R组相比,厄贝沙坦组梗死面积、Bax蛋白表达和AI降低,而Bcl-2蛋白表达和p-Akt活性增加(P＜0.01);LY组与厄贝沙坦组相比,梗死面积、Bax蛋白表达和AI增加,而Bcl-2蛋白表达和p-Akt降低(P＜0.01),与I/R组比较差异无统计学意义(P＞0.01).结论 厄贝沙坦能够通过激活PI3K/Akt通路,进一步调控Bcl-2、Bax蛋白的表达,抑制再灌注心.肌细胞的凋亡.     

Value of D-Dimers in patients with acute aortic dissection

Objective: To evaluatel the value of D-dimers in patients with acute aortic dissection (AAD). Methods: This study consisted of 16 patients with AAD and 27 non-AAD patients. Serum D-dimets were measured by Sta-Liatest D-DI immunoturbidimetric assay. Results: D-dimer level was higher (P ＜ 0.001) in patients with AAD(7.91 ± 5.52 μg/ml) than that in non- AAD group(1.57±1.24 μg/ml). D-dimer was positive (＞0.4 μg/ml) in all patients with AAD and in 10 control group patients (37%). Among patients with acute AAD, D-dimers tended to be higher in Stanford A than in Stanford B (8.67 ± 4.31 μg/ml vs. 3.24±1.27 μg/ml, P ＜0.01). D-dimer values tended to be higher in more extended disease(3.84 ± 1.65 μg/ml, 8.57 ± 3.58 μg/ml and 11.87 ± 5.69 μg/ml in thoracic aorta, thoracic and abdominal aorta, thoracic and abdominal aorta and iliacal arteries, respectively, P ＜ 0.05 for both 8.57 ± 3.58 and 11.87 ± 5.69 vs. 3.84 ± 1.65 ). Including the control group into the analysis, we found a sensitivity of 100%, a negative predictive value of 100%, and a specificity of 66% and a positive predictive value of 64% for D-dimer in diagnosis of AAD in our patients with suspected AAD. Conclusion: D-dimer was elevated in patients with AAD. A negative D-dimer test result could be useful in excluding AAD.     

Research of combined liver-kidney transplantation model in rats

Objective： To set up a simple and reliable rat model of combined liver-kidney transplantation. Methods： SD rats served as both donors and recipients. 4℃ sodium lactate Ringer＇s was infused from portal veins to donated livers,and from abdominal aorta to donated kidneys, respectively. Anastomosis of the portal vein and the inferior vena cava （IVC） inferior to the right kidney between the graft and the recipient was performed by a double cuff method, then the superior hepatic vena cava with suture. A patch of donated renal artery was anastomosed to the recipient abdominal aorta. The urethra and bile duct were reconstructed with a simple inside bracket. Results： Among 65 cases of combined liver-kidney transplantation, the success rate in the late 40 cases was 77.5%. The function of the grafted liver and kidney remained normal. Conclusion： This rat model of combined liver-kidney transplantation can be established in common laboratory conditions with high success rate and meet the needs of renal transplantation experiment.     

APPLICATION OF LORNOXICAM TO PATIENT-CONTROLLED ANALGESIA IN PATIENTS UNDERGOING ABDOMINAL SURGERIES

FOR anesthesiologis s ,treatingpostoperativepainhas alwaysbeen a problem.Althoughopioidshave been provedtobe effective,theirsideeffectscouldnotbeignored.With thedevelopmentofscienceand pharmacology,many drugs with aspectsof satisfactoryanalgesicefficacyand couldbe welltoleratedby patientshave been developed.And lornoxicamisone of them, which isa non-steroidalanti-inflammatorydrug (NSAID ), with analgesic, anti-infl-ammatory,andantipyreticproperties.Itseliminationhalf-time(3 to 5 hours) isle…     

Acupuncture Combined with Spinal Tui Na for Treatment of Primary Dysmenorrhea in 30 Cases

Objective: To observe the therapeutic effects in acupunture treatment of primary dysmenorrhea combined with spinal Tui Na, and study its mechanism. Methods: Thirty cases of the treatment group were treated by acupuncture combined with spinal Tui Na, and thirty cases in the control group were treated by routine acupuncture. Results: The total effective rate was 93.3% in the treatment group, and 73.3% in the control group, with a significant difference between the two groups (P<0.05). Conclusions: Acupuncture combined with spinal Tui Na has good prospects for treatment of primary dysmenorrhea.     

Luo Lingjie's Experience in Treating Chronic Nephropathy

In treating chronic nephropathy,Luo Lingjie,a chief physician,pays attention to regulating the balance between yin and yang,treating infection if present,and removing pathogenic factors.He prescribes gentle drugs and uses carefully strongly warming-tonifying ones,emphasizes the importance of persuading the patient to persist in treatment with medication and nurse one's health for recuperation,and is good at combined use of TCM and western medicine therapy and brings the merits of various therapies into full play,with obvious theraoeutic effects.     

Dr.Zhang Ren's Experience in the Acupuncture Treatment of Different Diseases with the Same Therapeutic Principle

Dr.Zhang Ren,the chief physician,is the chairman of Shanghai Acupuncture and Moxibustion Association.Having been engaged in medicine for about 40 years,he is experienced in treating various intractable diseases.In his long years of clinical practice,he advocates taking the TCM differentiation as the basis to seek for the acupuncture method for treatment of modern intractable diseases.The author of this essay had the fortune to follow Dr.Zhang in study.The following is a summary of Dr.Zhang's experience in the acupuncture treatment for different intractable diseases with the same therapeutic principle.     

安心颗粒对急诊经皮冠状动脉介入术后生活质量影响的研究

目的：评价使用安心颗粒对急诊经皮冠状动脉介入术（PPCI）术后生活质量的影响.方法：将160例接受PPCI的急性ST段抬高型心肌梗死患者随机分为安心颗粒组（术前顿服安心颗粒8.8g,术后安心颗粒4.4 g/次,每日2次）和对照组（仅接受基础药物治疗）.所有患者均服用阿司匹林、氯吡格雷和阿托伐他汀.分别在入院时、出院前1d、出院后180 d时,应用心肌梗死多维度量表（MIDAS）、中文版SF-36评价量表对患者生活质量评分.并观察术后30 d以内的出血并发症、血小板减少症发生情况.结果：入院时和出院前1d,两组患者的心肌梗死MIDAS、SF-36量表评分比较无差异（P＞0.05）;出院后180 d时,与对照组比较,安心颗粒组MIDAS、SF-36评分明显减低（P＜0.05）;组内与入院时比较,两组出院前1d、出院后180 d时,MIDAS、SF-36评分均降低（P＜0.05）.两组患者在随访期间均无大量出血、少量出血、重度和极重度血小板减少症发生,安心颗粒组有4例、对照组有7例发生不明显出血（P＞0.05）.两组发生轻度血小板减少症的患者数比较无差异（P＞0.05）.结论：PPCI使用安心颗粒,能改善急性ST段抬高型心肌梗死患者的生活质量,且不增加出血风险.     

The comparative studies of the influences of Urapidil and Nicardipine on sino-atrial node function, atrio-ventricular node function and hemodynamics

Objective:To investigate the influences of urapidil and nicardipine on rabbit sinus function,atrio-ventricular node function and hemodynamics.Methods:Thirty-two Angora's rabbits were selected and randomly divided into four groups.U1 group:urapidil 0.25 mg/kg;U2 group:urapidil 0.5 mg/kg;N1 group:nicardipine 10 μg/kg;N2 group:nicardipine 20 μg/kg.All these medicine were administrated within 30 seconds.Measurements were taken before and after the administration of urapidil or nicardipine for the following data:mean blood pressure(MAP),heart rate(HR),sino-atrial conduction time(SACT),maximal sinoatrial recovery time(SNRTmax)corrected sinus node recovery time(CSNRT),index of sinus node recovery time(SNRTI),Wenckebach A-V conduction frequency (WB),and P-R interval.Results:Significant MAP and HR changes were identified in all of the four groups before and after administration of both urapidil and nicardipine.No significant changes could be found in the rest of the parameters.Intergroup analysis showed that SACT and CSNRT of N1 and N2 groups were shorter than those of the U2 group(P＜0.01);the MAP decreased(P＜0.01)and the HR increased drastically(P＜0.01).Conclusions:Neither urapidil(0.25 mg/kg,0.5 mg/kg)nor nicardipine(10μg/kg,20μg/kg)has any significant influence on rabbit sinus function or rabbit atrio-ventricular node function.Nicardipine could be a better choice than urapidil for parafunctional sinus node patients.     

猪肺磷脂注射液联合经鼻持续气道正压通气对呼吸衰竭早产儿的临床疗效及肌酸激酶同工酶活性的影响

目的 探讨猪肺磷脂注射液联合经鼻持续气道正压通气(NCPAP)对呼吸衰竭早产儿的临床疗效及肌酸激酶同工酶活性(CK-MB)的影响.方法 选取呼吸衰竭早产儿80例,分为观察组和对照组各40例.对照组采用NCPAP给氧治疗,观察组给予NCPAP给氧联合猪肺磷脂气管内给药.观察两组患儿治疗前及治疗12h、24 h后PaO2、PaCO2、血氧饱和度(SaO2)、pH的变化情况,检测治疗前及治疗5d后血清CK-MB水平;评估两组患儿的临床治疗效果.结果 两组患儿PaO2、PaCO2、SaO2、pH比较,差异均有统计学意义(P＜0.05),其中观察组治疗后的PaO2、SaO2、pH均高于对照组,PaCO2则低于对照组.两组的PaO2、SaO2、pH均随观察时间延长而升高(P＜0.05),PaCO2均随观察时间的延长而降低(P＜0.05).观察组治疗有效率为87.5％,显著高于对照组的70.0％ (P ＜0.05).治疗5d后两组患儿血清CK-MB水平均较前降低(P＜0.05),且观察组明显低于对照组(P＜0.05).结论 猪肺磷脂注射液气管内给药联合NCPAP可以显著降低呼吸衰竭早产儿CK-MB的含量,提高治疗有效率,起到很好的呼吸循环支持作用.