Tc—99m标记抗AFP抗体在人肝癌裸鼠模型中的定位显像研究

目的：揭示锝（Ｔｃ）－９９ｍ标记的单克隆抗体在肿瘤定位中的应用。方法：通过ＳＭＣ－７７２１－ＣＳ细胞株诱导原发性肝癌实体瘤裸鼠模型，将Ｔｃ－９９ｍ标记抗ＡＦＰ单克隆抗体（ＡｎｔｉＡＦＰ－ＭｃＡｂ）和正常鼠免疫球蛋白（ＮＭＩｇＧ）通过尾静脉注射荷瘤裸鼠，分别在１５ｍｎ、１２ｈ、２４ｈ作单光子发射计算机断层显像（ＳＰＥＣＴ），结果：在注射标记抗体２４ｈ能得到清晰的肿瘤显像，对照组无肿瘤显像，其中靶与非     

99Tcm-抗血栓成分单克隆抗体对动物血栓的放免显像研究

目的　评价９９Ｔｃｍ 标记抗血栓成分（ 血小板和纤维蛋白）的单克隆抗体（ＭｃＡｂ） ＳＺ－ ５１ 和ＳＺ－ ６３,对实验性动物（ 兔、狗）股动脉和股静脉血栓模型显像的作用。方法　以亚氨基噻吩盐酸盐（２ － ＩＴ） 修饰,９９Ｔｃｍ 标记葡庚糖酸钠（ＧＨ） 配体交换法标记ＳＺ－ ５１ 和ＳＺ－ ６３。狗、兔股动脉和股静脉血栓模型制备完毕后,耳缘静脉注入９９　Ｔｃｍ － ＳＺ－ ５１或９９Ｔｃｍ － ＳＺ－ ６３ 进行ＳＰＥＣＴ 显像。９９Ｔｃｍ 标记非特异性鼠ＩｇＧ 作为阴性对照。结果　９９Ｔｃｍ － ＳＺ－５１ 和９９Ｔｃｍ － ＳＺ－５１／６３ 对狗新鲜血栓均显示清晰,其最佳显像时间分别为注射后２ ～４ｈ 和０．５ ～２ｈ,而陈旧血栓未见显像。９９Ｔｃｍ － ＳＺ－ ６３ 兔陈旧血栓显示清晰,其最佳显像时间为注射后２ ～４ｈ。结论　９９Ｔｃｍ － ＳＺ－ ５１ 和９９Ｔｃｍ － ＳＺ－ ６３ 具有活体内血栓定位导向能力,显像时间短,用于血栓性疾病的放免显像有一定的可行性。     

瘤内注射核素标记混合抗体治疗肝癌的实验研究

目的 为临床应用混合抗体进行瘤内注射放射免疫治疗提供实验依据。方法 在裸鼠荷人肝癌２．２．１５移植瘤生长至１ｃｍ时,瘤内分别或同时注射＾１３１Ｉ标记的抗癌胚蛋白（ＡＦＰ）单克隆抗体（＾１３１Ｉ－ＡＦＰ－ＩＴ）和＾１３１Ｉ标记抗乙型肝炎表面抗原单克隆抗体Ｓ１０２（＾１３１Ｉ－Ｓ１０２－ＩＴ）,治疗后行ＳＰＥＴ显像观察标记抗体在肿瘤内的浓聚,并进行疗效观察。结果 发现两种标记抗体联合治疗组肿瘤抑制率为     

^99mTc标记卵巢癌单抗片段F（ab‘）2放射免疫显像的实验研究

目的：为了改进放射免疫显像（ＲＩＩ），进行＾９９ｍＴｃ标记卵巢癌单克隆抗体ＣＯＣ１８３Ｂ－Ｆ（ａｂ’）２ＲＨ的研究。方法：采用无茶果酶制单抗ＣＯＣ１８３Ｂ２片段（ａｂ’）２，改进ＳｎＣｌ２法进行＾９９ｍＴｃ标记片段Ｆ（ａｂ’）２及正常鼠ＩｇＧ（ＮＭＩｇＧ）；＾９９ｍＴｃ－ＣＯＣ１８３Ｂ２或＾９９ｍＴｃ－ＮＭＩｇＧ标记物分别经腹腔注入荷入卵巢癌裸鼠体内，１８ｈ进行ＲＩＩ。显像后测定并计算肿瘤与非肿瘤     

99mTc标记卵巢癌单抗片段F(ab'''')2 放射免疫显像的实验研究

目的：为了改进放射免疫显像（ＲＩＩ），进行９９ｍＴｃ标记卵巢癌单克隆抗体ＣＯＣ１８３Ｂ２Ｆ（ａｂ’）２ＲＩＩ的研究。方法：采用无花果酶制备单抗ＣＯＣ１８３Ｂ２片段Ｆ（ａｂ’）２，改进ＳｎＣｌ２法进行９９ｍＴｃ标记片段Ｆ（ａｂ’）２及正常鼠ＩｇＧ（ＮＭＩｇＧ）；９９ｍＴｃＣＯＣ１８３Ｂ２或９９ｍＴｃＮＭＩｇＧ标记物分别经腹腔注入荷人卵巢癌裸鼠体内，１８ｈ进行ＲＩ。显像后测定并计算肿瘤与非肿瘤组织放射性活度比值（Ｔ／ＮＴ）。结果：（１）无花果酶可制备ＣＯＣ１８３Ｂ２单抗片段Ｆ（ａｂ’）２；（２）改进ＳｎＣｌ２法进行９９ｍＴｃ标记Ｆ（ａｂ’）２，标记率达９０％以上；（３）１８ｈ后ＲＩ，可见９９ｍＴｃＣＯＣ１８３Ｂ２组荷瘤裸鼠较９９ｍＴｃＮＭＩｇＧ对照组移植瘤图像清晰，且Ｔ／ＮＴ值明显高。结论：应用片段Ｆ（ａｂ’）２可改善ＲＩＩ。     

抗人AFP－R－LCA McAb在裸鼠人肝癌模型中放免显像及治疗

放射性核素~（１３１）Ｉ标记的抗人小扁豆凝集素结合型甲胎蛋白异质体（ＡＦＰ－Ｒ－ＬＣＡ）ＭｃＡｂ，注入荷瘤裸鼠腹腔后，能在裸鼠人肝癌模型肿瘤区积聚，其放射性核素浓度是裸鼠肝脏的５．２倍；而~（１３１）Ｉ标记的正常小鼠ＩｇＧ（ｍＩｇＧ）及游离~（１３１）Ｉ却无肿瘤区积聚，且在荷瘤裸鼠体内呈均匀分布。~（１３１）Ｉ－ＡＦＰ－Ｒ－ＬＣＡＭｃＡｂ组γ照像均显示出裸鼠人肝癌的阳性定位。用~（１３１）Ｉ－ＡＦＰ－Ｒ－ＬＣＡＭｃＡｂ治疗裸鼠人肝癌，肿瘤生长受到明显抑制（８５．０％），优于~（１３１）Ｉ－ｍＩｇＧ及游离~（１３１）Ｉ（４６．０％、２０；１％，Ｐ＜０．０５）．结果表明：ＡＦＰ－Ｒ－ＬＣＡＭｃＡｂ对人肝癌细胞有较强的亲和力和特异性，有希望成为肝癌导向研究的理想载体。     

ＣＤ４５单抗介导的淋巴瘤荷瘤裸鼠三步法预定位放免显像

摘 要： 【目的】 评价生物素化ＣＤ４５单抗介导的９９ｍＴｃ－生物素在人Ｒａｊｉ细胞移植瘤裸鼠模型中三步法预定位放免显像的价值。【方法】 ＣＤ４５单抗及ＤＴＰＡ－生物素的９９ｍＴｃ标记采用直接标记法。取人Ｒａｊｉ细胞移植瘤裸鼠１８只,随机分为２组,每组９只。实验组为三步法预定位放免显像组,静注生物素化ＣＤ４５单抗１００ μｇ,４８ ｈ后静注亲和素２００ μｇ,再过４８ ｈ静注９９ｍＴｃ－生物素７．４ ＭＢｑ（２０ μｇ）;对照组为９９ｍＴｃ－ＣＤ４５单抗放免显像组,静注９９ｍＴｃ－ＣＤ４５单抗１００ μｇ。上述两组裸鼠分别于注药后３、６、１２ ｈ分别进行ＳＰＥＣＴ显像,每个时间点各取３只裸鼠断颈处死后,取脏器组织及肿瘤,称重后在γ计数仪中测量放射性计数,经放射性衰变校正后计算各脏器的％ＩＤ／ｇ及肿瘤／非肿瘤（Ｔ／ＮＴ）比值。【结果】平均每分子ＣＤ４５单抗约结合１２分子生物素,ＣＤ４５单抗及ＤＴＰＡ－生物素的９９ｍＴｃ标记率分别＞７０％和＞８０％。三步法给药后荷瘤裸鼠ＳＰＥＣＴ显像及生物分布示：整个显像期间血池内放射性均较低,肝脾见较多放射性浓聚;注射标记物后３－６ｈ,肿瘤显影清晰,并持续到１２ ｈ;注药后３、６和１２ ｈ肿瘤的％ＩＤ／ｇ分别为１．７３ ± ０．２２、１．２４ ± ０．０３和０．９４ ± ０．０７;肿瘤／血液比值分别为３．５、４．９和７．８;肿瘤／肌肉比值分别为８．２、８．９和１０．４。而静注９９ｍＴｃ－ＣＤ４５单抗后则可见肝脾及肾脏明显放射性聚集,１２ｈ血池内见较多放射性分布,肿瘤部位见有少量放射性集聚,１２ ｈ肿瘤的％ＩＤ／ｇ为０．８９ ± ０．１３,肿瘤／血液及肿瘤／肌肉的比值分别为１．６和２．５。【结论】与９９ｍＴｃ－ＣＤ４５单抗相比较,９９ｍＴｃ－生物素三步法预定位放免显像明显改善肿瘤Ｔ／ＮＴ比值,标记物注射后３ ｈ即可使肿瘤显影。     

131Ⅰ－McAbJH_（107）在载人肝癌BEL－7402裸鼠体内的放射免疫显像分析

用氯胺Ｔ碘标技术标记抗人肝癌单克隆抗体ＪＨ１０７（ＭｃＡｂＪＨ１０７），观测其在载人肝癌ＢＥＬ７４０２裸鼠模型上的分布显像情况，氯胺Ｔ碘标法标记率５０％。每鼠腹腔注射２００Ｃｉ１３１Ⅰ－ＭｃＡｂＪＨ１０７，放射性物质第２４ｈ开始在肿瘤部位浓聚、逐步加强，９６ｈ达高峰，肿瘤组织较清楚显像并维持至１４８ｈ；同时周围组织放射性本底逐步减弱、消失。对照组１３１Ⅰ－ＮＩｇＧ呈全身均匀分布。无明显放射性物质浓聚及清楚显像。在４８ｈ和９６ｈ，１３１Ⅰ－ＭｃＡｂＪＨ１０７在１２种正常组织（脑除外）的Ｔ／ＮＴ均值分别为３．３８和６．２６，而１３１Ⅰ－ＮＩｇＧ的Ｔ／ＮＴ均值均低于１．０。     

硝酸甘油对室间隔缺损合并心力衰竭婴幼儿血流动力学影响

目的：探讨静脉滴注硝酸甘油（ｎｉｔｒｏｇｌｙｃｅｒｉｎ, ＮＴＧ）对室间隔缺损合并充血性心力衰竭婴幼儿血流动力学影响。方法：１５ 例室间隔缺损合并充血性心力衰竭婴幼儿,在连续监测心率和血压的情况下,静脉滴注ＮＴＧ０ ．４～０ ．８ μｇ·ｋｇ－ １·ｍｉｎ －１ ,利用超声心动图在用药前、用药后１ ｈ、６ ｈ 分别测定左心室射血分数（ｅｊｅｃｔｉｏｎｆｒａｃｔｉｏｎ,ＥＦ） 、短轴缩短率（ｆｒａｃｔｉｏｎａｌｓｈｏｒｔｅｎｉｎｇ,ＦＳ）、肺动脉平均压（ｐｕｌｍｏｎａｒｙ ａｒｔｅｒｙ ｍｅａｎ ｐｒｅｓｓｕｒｅ,ＰＡＭＰ） 、肺毛细血管楔压（ｐｕｌｍｏｎａｒｙｃａｐｉｌｌａｒｙ ｗｅｄｇｅ ｐｒｅｓｓｕｒｅ,ＰＣＷＰ） 和左心室壁应力（ｌｅｆｔ ｖｅｎｔｒｉｃｕｌａｒ ｗａｌｌｓｔｒｅｓｓ,ＬＶＷＳ） 等。结果：ＰＣＷＰ用药前（２．８ ±０ ．４） ｋＰａ,用药后１ ｈ 降至（１．７ ±０ ．４） ｋＰａ,６ ｈ 降至（１．６±０．４） ｋＰａ（ Ｐ＜ ０ ．０５） ;ＬＶＷＳⅠ用药前（４－３２±０－５６） Ｎ／ｃｍ２ ,用药后１ ｈ 降至（３－６５ ±０－５９） Ｎ／ｃｍ２ ,６ ｈ 降至（３－８７ ±０－６０） Ｎ／ｃｍ２（ Ｐ＜ ０．０５） ;ＬＶＷ     

^99Tc^m—抗血栓成分单克隆抗体对动物血栓的放免显像

目的 评价＾９９Ｔｃ＾ｍ标记抗血栓在分（血小板和纤维蛋白）的单克隆抗体（ＭｃＡｂ）ＳＺ－５１和ＳＺ－６３,对实验性动物（兔、狗、０股动脉和股静脉血栓模型显的作用。方法 以亚氨基噻吩盐酸盐（２－ＩＴ）修饰,＾９９Ｔｃ＾ｍ标记葡庚糖酸钠（ＧＨ）配体交换法标记ＳＺ－５１和ＳＺ－６３,狗、兔股动脉和股静脉血栓模型制备完毕后,耳缘静脉注入＾９９Ｔｃ＾ｍ－ＳＺ－５１或＾９９Ｔｃ＾ｍ－ＳＸ－６３乾坤业像。＾９９     

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.