CXCR4在卵巢癌组织中的表达及意义

目的:探讨趋化因子受体CXCR4及其配体SDF-1在上皮性卵巢癌中的表达及意义.方法:应用免疫组织化学方法检测CXCR4/SDF-1蛋白在上皮性卵巢癌组织中的表达情况.结果:在上皮性卵巢癌组织中CXCR4/SDF-1均呈阳性表达,分别与对照组相比,差异具有显著性(P＜0.05).结论:CXCR4及其配体SDF-1系统可能在卵巢癌的发生与转移过程中起重要作用.     

子宫内膜癌组织CXCL12及其受体CXCR4 mRNA表达及意义

目的了解趋化因子CXC配体-12(CXCL12)及其受体CXCR4在子宫内膜癌组织表达及其意义。方法采用RT-PCR方法,检测12例正常子宫内膜组织和29例子宫内膜癌组织CXCL12、CXCR4mRNA表达,分析子宫内膜癌组织CXCL12、CXCR4mRNA表达与临床病理特征的关系。结果子宫内膜癌组织CXCL12、CXCR4mRNA表达显著高于正常子宫内膜组织(t=3.338、4.174,P<0.01),且二者表达呈显著正相关(r=0.796,P<0.01)。子宫内膜癌组织中CXCL12mRNA表达与FIGO分期、淋巴结转移、细胞分化程度、病理类型及年龄无关(P>0.05);不同病理分级的子宫内膜癌组织CXCR4mRNA表达差异有统计学意义(F=5.535,P<0.01),且其表达与子宫内膜癌病理分级呈负相关(r=-0.472,P<0.05);CXCR4mRNA表达与FIGO分期、淋巴结转移、病理类型及年龄无关(P>0.05)。结论子宫内膜癌组织中CXCL12、CXCR4mRNA表达上调,提示CX-CL12和CXCR4可能在子宫内膜癌的发生、发展中发挥生物学作用。     

趋化因子受体CXCR4在肝细胞癌中的表达

目的:研究趋化因子受体CXCR4在肝细胞癌组织、肝癌MHCC97细胞、人脐带血管内皮细胞(HUVEC)中的表达,同时检测肝癌患者腹水中CXCR4的配体CXCL12的含量,为进一步探讨CXCR4在肝癌细胞转移中的作用奠定基础.方法:利用半定量RT-PCR和蛋白印迹方法检测MHCC97细胞、HUVEC细胞、21例不同时期的肝细胞癌组织及17例正常肝组织中CXCR4的表达水平,同时ELISA检测18例肝癌患者腹水中CXCL12的含量.结果:在肝细胞癌组织、肝癌细胞株及血管内皮细胞中,CXCR4在mRNA及蛋白水平的相对表达量分别为2.21±1.09、2.14±1.15、1.72±1.20及1.51±0.12、1.76土0.25、1.89±0.24,正常肝脏组织在mRNA及蛋白水平均未检测到CXCR4的表达.肝细胞癌癌性腹水定量检查结果显示,CXCL12含量为783～8 364 pg/ml(中位数为6 871 pg/ml).结论:肝细胞癌组织和细胞中存在着CXCR4的高表达.但与肝癌临床分期无显著性相关,同时肝癌患者腹水中存在CXCL12的含量升高,这提示CXCR4可能在肝癌的转移中发挥重要的作用.     

CXCR4在VEGF-C介导的胃癌淋巴道转移中的作用

目的 探索趋化因子受体CXCR4和VEGF-C与胃癌淋巴道转移的关系,为研究干预胃癌淋巴转移的新方法提供理论依据.方法 采用RT-PCR方法检测86例胃癌组织中趋化因子受体CXCR4 mRNA的表达及VEGF-C mRNA的表达,探索其与胃癌淋巴结转移的关系;Boyden趋化小室法检测CXCR4不同表达状态胃癌细胞的趋化活性和趋化抑制性.结果 86例胃癌组织均有不同程度的CXCR4 mRNA和VEGF-C mRNA的表达.53例CXCR4 mRNA呈高表达,表达率为61.63%,VEGF-C mRNA高表达率为56.98%(49/86);VEGF-C mRNA高表达组中的CXCR4 mRNA的表达率也较高;CXCR4 mRNA的表达与胃癌淋巴结转移呈正相关(P＜0.05);CXCR4的配体SDF-1对胃癌细胞的平均趋化率为81%,经抗CXCR4单克隆抗体处理后癌细胞的平均趋化率下降至30%,CXCR4被特异性抗体封闭前后的癌细胞趋化活性有显著性差异(P＜0.05).结论 胃癌CXCR4的表达和VEGF-C的表达与胃癌淋巴结转移呈正相关;CXCR4的功能状态影响胃癌细胞的迁移活性.通过干预趋化因子受体CXCR4和VEGF-C的活性可能成为阻断胃癌淋巴转移的新靶点.     

骨桥蛋白和趋化因子受体4在卵巢肿瘤组织中的表达及其意义

目的:分析骨桥蛋白(OPN)和趋化因子受体4(CXCR4)在不同卵巢组织中的表达,探讨二者在卵巢癌的发生、发展和转移过程中的作用。方法:选取正常卵巢组织(20例)、卵巢良性上皮性肿瘤组织(20例)和上皮性卵巢癌组织(40例),采用免疫组织化学SP法检测不同卵巢组织中OPN和CXCR4表达,分析不同临床特征上皮性卵巢癌组织中OPN蛋白和CXCR4蛋白表达率。结果: OPN在上皮性卵巢癌组织的阳性表达率高于在正常卵巢组织和良性卵巢肿瘤组织表达率,不同分化程度(G₁、G₂和G₃期)上皮性卵巢癌组织阳性表达率组间比较差异均有统计学意义(P<0.05),Ⅲ-Ⅳ期上皮性卵巢癌组织中OPN阳性表达率明显高于Ⅰ-Ⅱ期组(P<0.05),在不同组织学分型上皮性卵巢癌组织(卵巢浆液性囊腺癌、卵巢黏液性囊腺癌和卵巢子宫内膜样癌)中OPN阳性表达率比较差异无统计学意义(P>0.05)。CXCR4在正常卵巢组织及卵巢良性肿瘤组织中均无阳性表达,在上皮性卵巢癌组织中呈阳性表达。CXCR4在上皮性卵巢癌不同病理分级(高分化G₁、中分化G₂和低分化G₃)、不同临床分期(Ⅰ-Ⅱ期、Ⅲ-Ⅳ期)、不同组织学分型(浆液性囊腺癌、黏液性囊腺癌和子宫内膜样癌)组织中阳性表达率比较差异无统计学意义(P>0.05)。结论:OPN和CXCR4在卵巢肿瘤 细胞中表达水平与肿瘤细胞的恶性程度具有一定关联,提示OPN和CXCR4表达通路可能成为卵巢癌治疗的一个新靶点。     

白藜芦醇对CXCL12诱导的胃癌细胞迁移及侵袭的影响

[目的]探讨白藜芦醇对CXCL12诱导的胃癌SGC-7901细胞迁移及侵袭的影响.[方法]利用CXCL12刺激人胃癌细胞株SGC-7901后,采用划痕法检测细胞迁移能力,进行Transwell小室体外侵袭实验检测肿瘤细胞的侵袭能力,采用RT-PCR技术检测CXCL12受体CXCR4,CXCR7mRNA及血管内皮生长因子(VEGF)mRNA表达水平,应用Western印迹技术检测细胞中p-ERK蛋白的表达.观察白藜芦醇对CXCL12诱导的SGC-7901细胞迁移及侵袭能力及CXCR4,CXCR7,VEGF mRNA,p-ERK蛋白表达的影响.[结果]CXCL12可显著促进细胞迁移及侵袭,上调CXCR4,CXCR7,VEGF mRNA及p-ERK蛋白的表达水平.白藜芦醇可明显抑制CXCL12诱导的SGC-7901细胞的迁移及侵袭,下调CXCR4,CXCR7,VEGF mRNA及p-ERK蛋白的表达水平.[结论]白藜芦醇可有效抑制CXCL12诱导的胃癌细胞的迁移及侵袭,其机制可能与下调受体CXCR4和CXCR7的表达、抑制p-ERK蛋白及VEGF mRNA的表达有关.     

蜕膜自然杀伤细胞趋化因子受体的表达及募集机制的研究

目的　研究早孕期人蜕膜自然杀伤 (NK)细胞趋化因子受体谱的表达及其特异性募集的机制。方法　收集早孕期蜕膜组织 ,免疫磁珠分选CD5 6 brightCD16 -NK细胞 ;逆转录 聚合酶链反应(RT PCR)检测CD5 6 brightCD16 -NK细胞中 18种趋化因子受体的转录水平 ,筛选出高表达的趋化因子受体 (即CXCR4及CXCR3)。原位杂交及免疫组织化学分析CXCR4特异性配体基质细胞衍生因子 (SDF 1)在早孕胎盘的定位表达 ;ELISA检测早孕滋养细胞培养上清液中SDF 1α的浓度水平。趋化试验研究重组人SDF 1α(rhSDF 1α)及滋养细胞培养上清液对蜕膜CD5 6 brightCD16 -NK细胞的趋化作用。结果　人蜕膜CD5 6 brightCD16 -NK细胞可转录多种趋化因子受体 ,其中CXCR4及CXCR3mRNA呈高水平表达。人早孕期滋养细胞表达趋化因子SDF 1;原代培养的滋养细胞可自发分泌SDF 1α,培养 6 0h后上清液中SDF 1α的浓度达 385ng/L± 91ng/L。rhSDF 1α及滋养细胞培养上清液对蜕膜CD5 6 brightCD16 -NK细胞具有显著趋化作用。当rhSDF 1α为 10 μg/L时趋化至Transwell下室中的细胞可达总细胞数的2 2 9%± 4 3%。结论　人早孕期蜕膜CD5 6 brightCD16 -NK细胞高水平转录CXCR4 ,而滋养细胞则表达并分泌CXCR4的配体SDF 1。SDF 1趋化、募集CD5 6 br     

铂耐药上皮性卵巢癌组织中CXCL5的表达与患者临床特征的关系

目的 探讨铂耐药上皮性卵巢癌组织中CXC趋化因子配体-5(CXCL5)的表达与患者临床特征的关系。方法 收集行满意肿瘤细胞减灭术后联合铂类为主规范化疗的134名上皮性卵巢癌患者,根据患者停止化疗后6个月的复发情况分为铂耐药组70例(实验组)和铂敏感组64例(对照组)。采用免疫组化法检测卵巢癌组织CXCL5表达,分析其与上皮性卵巢癌铂耐药的相关性。结果 CXCL5在铂耐药上皮性卵巢癌患者组织中的表达主要位于癌细胞的细胞质中;CXCL5在铂耐药型卵巢癌组织中的表达水平明显低于铂敏感型,2组差异有统计学意义(P<0.05);CXCL5在铂耐药组上皮性卵巢癌患者组织中的表达与新辅助化疗、总化疗次数、人附睾蛋白4(HE4)、中性粒细胞绝对值(NEUT)、血小板(PLT)、FIGO分期、组织学分化程度、腹水量有显著相关性(P<0.05);其中与新辅助化疗、总化疗次数、HE4、FIGO分期、腹水量呈负相关,与NEUT、PLT、组织学分化程度呈正相关;与糖类抗原(CA125)、年龄、绝经状态、病灶大小、肿瘤单双侧、脉管阳性无明显相关性(P>0.05)。结论 铂耐药上皮性卵巢癌患者组织...     

卵巢上皮性癌OPCML基因的表达缺失和启动子甲基化

目的探讨OPCML基因在卵巢上皮性癌中的失表达及其与基因启动子CpG岛甲基化的关系。方法用逆转录—聚合酶链反应、限制性内切酶-聚合酶链反应检测卵巢正常组织、良性上皮性肿瘤、上皮性癌组织和SKOV-3、3AO、CAOV3卵巢癌细胞株OPCML基因的失表达及CpG岛甲基化。结果在卵巢癌中OPCMLmRNA的表达率显著低于正常卵巢组织(χ2=30·108,P=0·0000)和卵巢良性肿瘤组织(χ2=21·162,P=0·000)。SKOV-3和CAOV3细胞未见OPCMLmRNA表达,而3AO细胞可见OPCMLmRNA表达。在卵巢癌中,启动子CpG岛尤其是HapⅡ酶切位点甲基化率显著高于正常卵巢组织(χ2=13·630,P=0·0000)和良性肿瘤组织(χ2=11·797,P=0·000)。卵巢癌OPCML启动子CpG岛甲基化和mRNA失表达呈显著相关(r=11·589,P=0·002)。SKOV-3和CAOV3细胞有内切酶位点甲基化,而3AO细胞无酶切位点甲基化。结论卵巢上皮性癌细胞存在OPCML基因失表达;基因启动子CpG岛,尤其是HapⅡ酶切位点的甲基化是导致OPCML基因失表达的途径,但不是唯一途径。     

SDF-1及其受体CXCR4在上皮性卵巢肿瘤中的表达及其意义

目的研究并分析SDF-1及其受体CXCR4在上皮性卵巢肿瘤中的表达及其意义。方法应用免疫组织化学SP法对正常的卵巢上皮组织12例,卵巢良性肿瘤20例,卵巢癌原发灶28例及相应盆腔腹膜转移灶10例等组织中SDF-1及其受体CXCR4蛋白表达情况进行监测。结果在正常的卵巢上皮组织中基质细胞衍生因子-1以及CXCR4表达为阴性;卵巢的良性肿瘤中基质细胞衍生因子-1的阳性表达率为9.48%,CXCR4表达为阴性等。其中正常卵巢以及卵巢良性肿瘤与卵巢癌原发灶、转移灶及结节性卵巢肿瘤间的SDF-1与CXCR4蛋白表达相比较弱,具有显著性差异(P0.05)。余各组间SDF-1及CXCR4表达无显著性差异。交界性卵巢肿瘤中基质细胞衍生因子-1与CXCR4表达无显著性差异(P0.05),在上皮性卵巢癌中基质细胞衍生因子-1和CXCR4表达呈正相关,具有显著性差异(P0.05)。结论基质细胞衍生因子-1与CXCR4的表达与细胞恶性转化有关,可参与卵巢恶性肿瘤的发展、侵袭及转移等过程。     

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.