突变型单核细胞趋化蛋白-1构建及其对单核细胞趋化蛋白-1的干预作用

目的:构建表达N端2-8位氨基酸缺失的突变型单核细胞趋化蛋白-1(mMCP-1),并观察其对单核细胞趋化蛋白-1(MCP-1)的干预作用.方法:Megaprimer-PCR构建mMCP-1-pVAX1(pVMm).以脂质体将pVMm转染真核细胞系C2C12,ELISA分析mMCP-1的表达情况.采用趋化实验分析mMCP-1对病毒性心肌炎小鼠外周血单个核细胞(PMNCs)的趋化活性及其对MCP-1的干预作用.结果:①酶切和测序显示野生型MCP-1真核表达载体(pVM)和pVMm构建成功.pVMm在真核细胞C2C12中有效表达.②mMCP-1不具有趋化病毒性心肌炎小鼠PMNCs的活性.与单纯使用MCP-1相比,以不同浓度的mMCP-1和MCP-1同时行趋化实验,被趋化的细胞明显减少(P＜0.01),25 μg/L mMCP-1可阻断10 μg/L MCP-1对病毒性心肌炎小鼠PMNC的趋化活性.结论:小鼠MCP-1 N端2-8位氨基酸决定其趋化活性.mMCP-1可用于干预MCP-1的作用.     

阻断单核细胞趋化蛋白-1可缓解病毒性心肌炎心肌病变

目的　研究单核细胞趋化蛋白 1(MCP 1)在B3型柯萨奇病毒 (CVB3)诱导病毒性心肌炎 (VMC)发病中的作用及其机制。方法　CVB3腹腔注射BALB/c小鼠 ,随机分 3组 :VMC组 (A组 )、抗体阻断组 (B组 )、羊IgG对照组 (C组 ) ,并设未感染生理盐水对照组 (D组 )。比较各组小鼠心脏重量和体重的比值 (HW/BW )、心肌组织病理学积分 (PS)、心肌组织病毒载量、血清CK MB水平和心肌浸润的单个核细胞变化。流式细胞术分析单个核细胞表面CCR2 ,趋化试验分析病毒性心肌炎小鼠外周血单个核细胞对MCP 1的趋化性。结果　与A组相比 ,B组血清CK MB水平降低 (P <0 .0 1)、PS减少 (P <0 .0 5 ) ,但是HW /BW和CVB3载量未呈明显改变 (P>0 .0 5 ) ;B组小鼠心肌浸润的单个核细胞减少 ,下降 2 2 %～ 5 6 % ,平均下降 39% ;与D组相比 ,B组CK MB、PS、HW /BW和CVB3载量均明显升高。而与A组相比 ,C组CVB3载量、血清CK MB水平、HW/BW和心肌组织病理学积分均未呈明显改变。同时发现 ,A组小鼠心肌组织浸润的单个核细胞中CCR2 细胞为 70 .2 9% ,外周血单个核细胞中CCR2 的细胞占 33.76 % ;B组小鼠心肌组织浸润的单个核细胞中CCR2 细胞下降 ,为 4 4 .37%。体外经MCP 1趋化的病毒性心肌炎外周血单个核细胞中CCR2 细胞占 86 .5 5 % ,而未趋     

细胞凋亡在小鼠病毒性心肌炎中的作用

目的 :探讨柯萨奇病毒 B3(CVB3)所致小鼠病毒性心肌炎 (VM)心肌细胞损伤的变化 ,观察细胞凋亡在心肌损伤中的作用。方法 :采用 CVB3制备小鼠病毒性心肌炎动物模型 ,分别于腹腔接种 CVB3后第 5、7、10、14、2 1、2 8d,取心肌组织切片 HE染色了解心肌损伤 (坏死 )情况 ;电镜和流式细胞仪检测 ,观察心肌中的细胞凋亡。结果 :心肌坏死方面 :光镜观察见对照组小鼠心肌组织无异常改变 ,实验组病鼠可见心肌细胞坏死和单核、淋巴细胞浸润 ,后期可见纤维化 ;心肌细胞凋亡方面 :电镜观察对照组心肌中未检出凋亡细胞 ,而病鼠心肌凋亡细胞检出率较高 5 8.33% (7/12例 ) ,且细胞凋亡多存在于炎症病灶周围的心肌细胞及病灶处炎性浸润细胞 ;各期病鼠心肌组织中的细胞凋亡比率较对照组明显增加 ,流式细胞仪检测平均心肌细胞凋亡百分率为 2 6 .74± 15 .2 2 % ,感染后第 7～ 14 d心肌细胞凋亡百分率明显高于其余时间 (P<0 .0 0 1)。结论 :小鼠病毒性心肌炎中心肌损伤坏死与凋亡共存 ,其中异常的心肌细胞凋亡与病毒性心肌炎的发病过程有关     

泛素蛋白酶体系统对 CVB3病毒性心肌炎小鼠的作用研究

目的通过抑制CVB3病毒性心肌炎小鼠中泛素蛋白酶体途径,研究泛素蛋白酶体系统在病毒性心肌炎发病中的作用机制.方法将72只雄性BALB/c小鼠随机分为心肌炎组(CVB组)、心肌炎+泛素蛋白酶体抑制剂MG-132处理组(CVB+T组)、正常对照组(Sham组)、正常对照+处理组(Sham+T组),每组各18只.前两组腹腔接种CVB3病毒诱发急性心肌炎,后两组腹腔注射PBS,CVB+T组和Sham+T组次日腹腔注射MG-132,0.75 mg/kg,连续给药7d.第8天取材,观察小鼠心肌组织病理变化,测定心肌CVB3病毒复制及血清肌钙蛋白I(cTnI)、脑钠肽(BNP)水平.结果心肌病理检查显示,Sham组与Sham+T组未见异常变化,CVB+T组心肌炎症性浸润和变性坏死较CVB组显著减轻;心脏重量/身体重量比值CVB组为6.18±0.40、CVB+T组为5.32±0.38,差异有统计学意义(P<0.05).cTnI、BNP水平CVB组为(3.88±0.08)μg/L、(3002±256)pg/ml, CVB+T组为(1.52±0.05)μg/L、(1506±142)pg/ml,CVB+T组均降低(均P<0.05);荧光定量PCR显示CVB3 mRNA水平CVB组(1.42±0.06)高于CVB+T组(0.72±0.04)(P<0.05).结论抑制泛素蛋白酶体途径减少了CVB3病毒复制,显著减轻心肌炎小鼠心脏病理损伤,起到保护心肌的作用.     

川芎嗪对CVB3感染小鼠心肌细胞凋亡的影响

目的 探讨川芎嗪对病毒性心肌炎(VM)小鼠心肌细胞凋亡的影响.方法 将50只BALB/c小鼠随机分为A、B、C、D、E 5组,每组10只.A组腹腔注射生理盐水0.5 mL;B、C、D、E组均腹腔注射柯萨奇病毒B组(CVB 3)0.5 mL诱导小鼠,建立VM模型.1 d后,A、B组给予腹腔注射生理盐水10 mg·kg-1,1次·d-1,连用7 d;C、D、E组分别腹腔注射盐酸川芎嗪注射液5 mg·kg-1、10 mg·kg-1、15 mg·kg-1,1次·d-1,均连用7 d;9 d 后处死小鼠.采用TUNEL法检测心肌细胞凋亡;光镜下观察心肌病理变化;免疫组织化学技术检测各组小鼠心肌细胞中Fas/FasL蛋白的表达.结果 心肌病理变化:A组无病变;心肌病变积分B组明显高于C、D、E组(均P＜0.01);细胞凋亡:与A组比较,B、C、D、E组细胞凋亡指数明显升高(P＜0.01或P＜0.05),与B组比较C、D、E组细胞凋亡指数明显降低(P＜0.01);Fas/FasL蛋白阳性染色指数:B、C、D、E组均显著高于A组(P＜0.01或P＜0.05),C、D、E组显著低于B组(P＜0.01).结论 川芎嗪可通过下调病毒性心肌炎小鼠心肌细胞Fas/FasL蛋白表达,减少心肌细胞凋亡和心肌损伤.     

硝酸甘油和硝酸异山梨酯抗柯萨奇B组3型病毒感染的体内实验研究

目的 研究硝酸甘油(glyeeryl trinatrate,GTN)和硝酸异山梨酯(isosorbide dinitrate,ISDN)抗柯萨奇B组3型病毒(CVB3)的作用,为GTN和ISDN今后在抗CVB性心肌疾病的临床应用提供实验依据.方法 用HeLa细胞扩增并收获CVB3后,测定CVB3的半数组织培养感染剂量(TCID50),BALB/c小鼠腹腔注射5000 TCID50的CVB3,同时给予GTN和ISDN,14天后处死小鼠,取心脏做常规组织病理学检查.结果 用GTN、ISDN保护的小鼠心肌病理标本每视野(x100)病灶数明显低于病毒 对照组,GTN组为0.89±0.18,ISDN组为1.25±0.22.与病毒对照组差异显著(P<0.05).结论 GTN、ISDN等临床常用于抗心绞痛的硝酸酯类药物具有明确的抗CVB3感染BALB/c小鼠心肌细胞的作用.     

心肌康对慢性病毒性心肌炎小鼠心肌细胞的保护作用

目的 观察心肌康对病毒性心肌炎小鼠心肌细胞的保护作用.方法 对清洁级Balb/c小鼠采用柯萨奇病毒(CVB3)腹腔注射染毒,制成慢性病毒性心肌炎动物模型,按照随机数字表法分为三组:A组为病毒性心肌炎(VMC)组、B组为心肌康组、C组氯沙坦组.另设20只腹腔接种不含病毒的Eagle's液小鼠为正常对照组,观察心肌康对模型鼠的生存率的影响及对CVB3 RNA表达、Ⅰ、Ⅲ型胶原含量的影响.结果 心肌康组、氯沙坦组小鼠的生存率明显高于病毒对照组,心肌康对CVB3感染鼠有保护作用,心肌康组对感染鼠的治疗作用要优于氯沙坦组.结论 心肌康可通过下调CVB3 RNA表达、抑制胶原增生而对心肌细胞产生保护作用.     

芪芍五味子复方制剂抗CVB3病毒抑制心肌细胞凋亡机制的研究

目的 研究中药芪芍五味子复方制剂抗柯萨奇B3病毒(CVB3)效果及抑制病毒性心肌炎小鼠心肌细胞凋亡的机制.方法 采用细胞培养法观察细胞病变效应(CPE)与广谱抗病毒药物病毒唑对照,进行复方制剂体外抗病毒实验;BALB/c小鼠接种CVB3建立病毒性心肌炎动物模型,随机分为正常对照组、病毒对照组、复方制剂治疗组和维生素C与病毒唑联用组,观察各组心肌病理变化,Real-time定量PCR检测小鼠心肌CVB3RNA水平,流式细胞仪检测心肌细胞凋亡和坏死率.结果 复方制剂体外最大无毒浓度为19.53g/L,预防给药、同时给药和治疗给药3种方式细胞培养所需有效药物浓度均低于病毒唑;与同期病毒对照组小鼠比较,复方制剂治疗组小鼠心肌炎症性病理变化明显减轻,CVB3RNA拷贝数降低(P<0.05),心肌细胞凋亡和坏死率显著降低(P<0.05).结论 芪芍五味子复方制剂可有效抗病毒,抑制病毒诱导心肌细胞凋亡,对CVB3感染小鼠心肌有良好的保护作用.     

柯萨奇病毒B3感染小鼠早期TNF-α的表达与心肌细胞凋亡的关系

目的:探讨柯萨奇病毒B3(CVB3)感染小鼠肿瘤坏死因子的表达与细胞凋亡的关系。方法:用CVB3感染小鼠建立病毒性心肌炎感染模型,测定血清中肿瘤坏死因子-α(TNF-α)的含量,同时采用末端脱氧核苷酸转移酶介导dUTP缺口末端标记法(TUNEL)检测心肌细胞凋亡情况。结果:与对照组比较,CVB3感染小鼠血清中TNF-α的含量明显升高,感染后5d,心肌细胞凋亡率与对照组比较差异显著(P<0.0001)。TNF-α与细胞凋亡之间有关联性(r=0.8276,P<0.05)。结论:在CVB3感染中心肌细胞凋亡与TNF-α明显升高有关,两者在病毒性心肌炎发病的早期起到了重要作用。     

硒对病毒性心肌炎小鼠心肌细胞凋亡的抑制作用及其作用机制

目的: 探讨硒对病毒性心肌炎(VMC)小鼠心肌细胞凋亡的抑制作用,阐明其对PI3K-Akt信号传导通路中Akt、磷酸化Akt(p-Akt)及其下游靶基因编码的Bax和Bcl-2蛋白的作用机制。 方法: 60只BALB/c小鼠随机分为正常对照组、病毒对照组和硒干预组(n=20)。正常对照组小鼠连续3 d腹腔注射不含病毒的培养液200 μL;病毒对照组小鼠腹腔注射100半数组织培养感染剂量(TCID₅₀)柯萨奇病毒B组病毒(CVB3)液200μL,连续3d;硒干预组小鼠在病毒对照组同样的处理后灌胃给予100 μg·kg^-1亚硒酸钠,每日1次,连续处理14d。接种CVB3的第15天处死小鼠,TUNEL法检测心肌细胞的凋亡情况,光镜下观察心肌病理变化,Western blotting法检测心肌细胞中Akt、p-Akt、Bcl-2、Bax和Cleaved caspase-3蛋白表达水平。 结果: 与病毒对照组比较,硒干预组小鼠生存率明显升高(P<0.01)。硒干预组小鼠的心肌病理改变较病毒对照组减轻。硒干预组小鼠心肌细胞凋亡率低于病毒对照组(P<0.01)。与病毒对照组比较,硒干预组小鼠心肌细胞中p-Akt、Bcl-2蛋白表达水平增加,Bax、Cleaved caspase-3蛋白表达水平明显降低,Bax/Bcl-2蛋白比值下降(均P<0.01)。 结论: 硒对CVB3感染导致的VMC小鼠心肌细胞有保护作用,其作用机制与硒通过活化心肌细胞的PI3K-Akt信号通路、调控其下游Bcl-2和Bax蛋白表达和抑制心肌细胞凋亡有关。     

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.     

BLOOD PRESSURE CHANGE WITH AGE IN SALT-SENSITIVE TEENAGERS

Objective To observe blood pressure change with age in salt-sensitive teenagers whose salt sensitivity were determined by repeated testing.Methods Salt sensitivity was determined through intravenous infusion of normal saline combined with volume-depletion by oral diuretic furosemide in 55 teenagers. After five years, salt sensitivity was re-examined and subject blood pressure was followed up. Blood pressure changes in salt-sensitive teenagers were compared to that of non-salt sensitive teenagers over five years.Results After 5 years, the repetition rate of salt sensitivity determined by intravenous saline loading is 92.7%. In teenagers with salt sensitivity on the baseline, both the systolic blood pressure increments and increment rates were much higher than non-salt sensitive teenagers (12.7±12.1 mmHg vs. 2.8±5.2 mmHg, P＜ 0.01; 12.2%± 12.0% vs. 2.5% ±4.4%, P＜ 0.001,respectively). There was a similar trend for diastolic blood pressure (8.4 ± 6.4 mmHg vs. 3.7 ± 6.4 mmHg, P = 0.052; 13.2% ±10.6 % vs. 6.8%± 10.1%, P = 0.053, respectively).Conclusions Salt sensitivity determined by intravenous saline loading showed good reproducibility. Blood pressure increments with age were much higher in salt-sensitive teenagers than non-salt sensitive teenagers, especially in terms of systolic blood pressure.     

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.     

Expression of OPGmRNA and ODFmRNA in the patients of hip fracture due to osteoporosis

Objective：To investigate the gene expression of osteoprotegerin（OPG） and osteoclast differentiation factor（ODF） in the bone tissue of patients with hip fracture due to osteoporosis. Methods：OPGmRNA and ODFmRNA in the bone tissue in 50 cases of osteoporosis sufferers（over 50 years old） with hip fracture（Observer Group） and 30 cases of hip facture sufferers with no osteoporosis（Control group） were analyzed with the Semi-Quantitative RT-PCR method. Results：The mRNA expressed of ODF, OPG were both high in the patients with hip fracture. In the control group, the expression of OPG mRNA was observed, while the expression of ODF mRNA was very slight. Conclusion：Aged patients contained all signals including OPG, ODF that are essential for inducing osteoclastogenesis and promoting bone resorption.     

The clinicopathological and immuohistochemical analysis of solid-pseudopapillary tumor of the pancreas： report of 9 cases

Objective：To investigate the clinical features, pathological characteristics and immunophenotype of solid-pseudopapillary tumor of the pancreas（SPTP）. Methods：Nine surgically treated cases of SPTP were retrospectively reviewed. Hematoxylin and Eosin（HE） staining and immunohistochemical staining were used to analyze all cases, and the general clinical data was collected. Results：Six patients were asymptomatic except for a palpable mass. Two patients complained of vague-epigastric pain. One patient appeared jaundice. The tumor was encapsulated and solid tissues alternately with cystic tissues. Histologically, the histological structure of solid portion was pseudopapillary with a fibrovascular core. Tumor cells were uniform and medium-sized which were arranged in sheets ets or nests or pseudopapillary patterns. Immunohistochemical studies demonstrated that SPTP proved positive in vimentin（9/9 cases）, AAT（9/9 cases）, NSE（9/9 cases）, ACT（7/9 cases）, CK20（2/9 cases）, CgA（1/9 cases）, S-100（3/gcases）, PR（4/gcases）, Syn（3/9 cases） and CD56（5/9cases）, negative in CEA and ER. Conclusion：SPTP is a tumor predominantly occurring in young women frequently without special symptoms. This tumor has various characteristical histological patterns with different immunophenotype.     

Dynamic Changes in Serum Estradiol and Progesterone levels in Patients of Premenstrual Syndrome with Adverse Flow of Liver-qi

Objective:To probe into the influence of changes of ovarian hormones on the pathogenesis of the specific sub-type premenstrual syndrome(PMS)and reveal partial microcosmic mechanisms of adverse flow of liver-qi.Methods:Estradiol(E2)and progesterone(P)levels in serum were determined at different phases of menstrual cycle by radioimmunoassay.Results:In the group of PMS with adverse flow of liver-qi.the secretive peak value Of E2 and P at the follicular phase significantly decreased,and the secretive peak value at the luteal phase did not come into being.Conclusions:Low E2 and P secretive peak at the follicular phase and absence of secretive peak at the luteal phase is one of the microcosmic mechanisms of PMS with adverse flow of liver-qi.One of the pathophysiologic mechanisms of specific sub-type PMS is probably the continuous low level of E2and P.     

Real-time Three-dimensional Echocardiography in Assessment of Left Ventricular and Right Ventricular Volumes

Real-time three-dimensional echocardiography (RT3DE)is a new ultrasound technique that enables dynamic threedimensional visualization and quantification of the heart in real time. Investigation of feasibility and methodology of RT3DE in determining left ventricular (LV) and right ventricular (RV) volumes, RT3DE was performed in 35 normal adults using Philips SONOS 7500 system with a 2-4 MHz matrix array transducer. The 60°×60° "pyramid" volume database was obtained and analyzed on a TomTec echo workstation. Both LV and RV volumes were calculated with four 3DE methods (i.e. apical 2, 4, 8, and 16-plane) through manually tracing ventricular endocardial borders in end diastole and end systole. Stroke volumes were then calculated. LV volume was also measured by 2DE Simpson's rule using GE VIVID 7 ultrasound machine.     

SCREENING FOR A 21-CHROMOSOME ABNORMALITY IN PREIMPLANTED EMBRYOS OF ELDERLY WOMEN

Increasing maternal age is the only etiological factor unequivocally linked to Down's syndrome in humans. The occurrence rate of newborns with Down's syndrome is about 1/220 in women over 35 years old. However, the occurrence rate in embryos fertilized in vitro, of the elder woman is unclear. Using FISH we screened the number of chromosome 21 in preimplanted embryos of 5 elderly women (average age, 38.4 years) to study the feasibility and necessity of screening trisomy 21 in embryos in patients over 35 years old at the in vitro fertilization (IVF) center.