MRI对急性心肌梗死后不同心脏状态下干细胞移植后体内再分布与疗效评价的动物实验研究  

Assessment of re-distribution and efficacy of stem cell transplantation in different heart status after acute myocardial infarction by MRI: an experimental study

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作  者:陆敏杰[1] 赵世华[1] 宋鹏[2] 刘琼[1] 蒋世良[1] 张岩[1] 闫朝武[1] 程怀兵[1] 马宁[1] 尹刚[1] 赵红[3] 安靖 金利新 Jerricic Renata 

机构地区:[1]中国医学科学院北京协和医学院阜外心血管病医院放射科,100037 [2]中国医学科学院北京协和医学院阜外心血管病医院心外科,100037 [3]中国医学科学院北京协和医学院阜外心血管病医院病理科,100037 [4]西门子医疗

出  处:《中华放射学杂志》2011年第7期678-684,共7页Chinese Journal of Radiology

基  金:国家自然科学基金资助项目(30471722);北京防和医学院学生创新基金资助项目(2009-xhj4)

摘  要:目的探讨MRI在研究停跳与不停跳两种心脏状态下,经猪心肌梗死模型心肌注射骨髓间充质十细胞后全身各主要脏器(心、肝、脾、肾)干细胞的早期再分布及疗效评价中的应用价值。方法干细胞提取自雄性猪并用超顺磁性氧化铁标记。雌性猪制成急性心肌梗死模型7d后数字表随机方法分为4组。第1组为心脏停跳细胞注射组(6只),体外循环后心脏停跳,超顺磁性氧化铁标记的干细胞(1×10^8)经心肌注入心肌梗死周边区。第2组为不停跳心脏细胞注射组(6只),相同的细胞在心脏跳动下经心肌注入心肌梗死周边区。第3组停跳心脏对照组(6只)和第4组不停跳心脏对照组(6只)中,相同剂量的生理盐水分别在停跳和不停跳状态下经心肌注入心肌梗死周边区。3d后,行MR T2*WI示踪和心功能检查。并取动物心、肝、脾、肺、肾的标本,用实时定量聚合酶链反应(qRT—PCR)检测雄性细胞特异性的性别决定区域(SRY)基因定量检查。统计学分析采用方差分析和t检验。结果第1—4组术前左心室舒张末期容积(LVEDV)分别为(56.8±5.3)、(54.8±6.8)、(57.4±4.3)和(56.8±2.8)ml,术后LVEDV分别为(65.2±5.2)、(63.2±3.7)、(60.2±4.7)和(62.2±4.4)ml,术前左心室收缩末期容积(LVESV)分别为(33.5±7.6)、(32.3±5.3)、(33.5±3.6)和(32.7±4.6)ml,术后LVESV分别为(37.3±5.6)、(36.3±6.9)、(34.3±5.4)和(36.3±8.1)ml;术前左心室射血分数值(LVEF)分别为(42.3±7.2)%、(41.7±6.8)%、(41.8±8.6)%和(42.7±7.7)%,术后LVEF分别为(44.5±8.7)%、(43.1±7.4)%、(42.8±5.6)%和(43.3±8.4)%;术前心肌梗死面积(MI)分别为(6.5±2.1)、(6.4±1.9)、(6.5±2.5)和(6.4�Objective To evaluate the efficacy of MRI for assessment of re-distribution of bone marrow meseuchymal stem cells injected intramyocardially in main organs (heart, liver, spleen and kidney) under different heart status ( beating or arresting ) in a porcine model. Methods Bone marrow-derived mesenchymal stem cells were obtained from the male swine and labeled with iron oxide during culture. Acute myocardial infarction was created in female swine, one week later, the survivors were randomly divided into 4 groups. Cardiopulmonary bypass was set up to arrest the heart, and then labeled cells ( 1 × 10^8 ) were intramyocardially injected into the border of the infracted myocardium in group 1 (n = 6). The same volume of cells was grafted into the beating heart in group 2 ( n = 6). In group 3 and 4, saline was injected into either the arresting or beating myocardium. Three days later, re-distribution of stem cells and cardiac function were assessed by T2 * WI and cine MRI, respectively. All animals were sacrificed for histology and real-time quantitative polymerase chain reaction (RT-PCR) of sex-determining region on Y-chromosome (SRY) investigation. The ANOVA and t test was used for statistics. Results The left ventricular end- diastolic volume ( LVEDV ) before transplantation for group 1-4 were : ( 56. 8 ± 5.3 ) , ( 54. 8 ± 6.8 ) , (57.4 ± 4. 3 ) and (56. 8 ± 2.8 ) ml, and after transplantation for group 1-4 were : (65.2 _± 5.2) , (63.2 ± 3.7 ) , ( 60. 2 ± 4. 7 ) and ( 62. 2 ± 4. 4 ) ml. The left ventrieular end-systolic volume ( LVESV ) before transplantation for group 1--4 were : ( 33.5 ± 7.6), ( 32.3± 5.3 ) , ( 33.5 - 3.6 ) and ( 32. 7 ± 4. 6 ) ml, and after transplantation for group 1--4 were: (37.3 ±5.6),(36.3 ±6.9), (34.3 ±5.4)and(36.3 ± 8.1 ) mL The left ventrieular EF values (LVEF) before transplantation for group 1--4 were: (42.3 ± 7.2)%, (41.7 ± 6. 8)% , (41.8 ± 8.6�

关 键 词:磁共振成像 骨髓祖代细胞 氧化物 动物实验 

分 类 号:R542.22[医药卫生—心血管疾病]

 

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