抗氧化营养素对DNA损伤的保护作用

（１）目的探讨抗氧化营养素对ＤＮＡ氧化损伤的影响。（２）方法实验分为实验组和对照组，实验组（ｎ＝２５）连续服用β－胡萝卜素，维生素Ｃ和Ｃ（ＶｉｔＥ，ＶｉｔＣ）２８０ｄ，对照组（ｎ＝２５）未服药，两组均取全血分离淋巴细胞，反应单细胞琼脂电泳（ＳＣＧＥ）检测ＤＮＡ的自发损伤及经不同浓度Ｈ２Ｏ２（３０，１００，３００μｍｏｌ／Ｌ）处理后的ＤＮＡ损伤程度。（３）结果两组淋巴细胞自发性ＤＮＡ损伤率都很低，分     

雌二醇诱发大鼠高血压后相关组织中Ca，Cu及Zn含量的变化

①目的探讨雌二醇诱发大鼠血压升高与某些离子的关系。②方法用原子吸收分光光度法（火焰法），检测了雌二醇诱发血压升高组及对照组大鼠血清、延髓、肾上腺、心肌和肾脏组织中Ｃａ２＋，Ｃｕ２＋和Ｚｎ２＋的含量，经ｔ检验统计处理。③结果与对照组相比，实验组大鼠血清和延髓中Ｃａ２＋的含量增加（ｔ＝２．３０３，Ｐ＜０．０５；ｔ＝２．０８５，Ｐ＜０．０５），而肾上腺和心肌中Ｃａ２＋含量减少（ｔ＝３．５１０，Ｐ＜０．０１；ｔ＝２．１０４，Ｐ＜０．０５）。血清和肾脏中Ｃｕ２＋含量增加（ｔ＝２．４５４，Ｐ＜０．０５；ｔ＝２．５６４，Ｐ＜０．０１），而延髓中Ｃｕ２＋含量减少（ｔ＝２．２５４，Ｐ＜０．０５）。延髓和肾上腺Ｚｎ２＋含量增高（ｔ＝２．５０２，Ｐ＜０．０５；ｔ＝２．１４７，Ｐ＜０．０５），而心肌和肾脏Ｚｎ２＋含量减少（ｔ＝２．０７７，Ｐ＜０．０５；ｔ＝２．４９８，Ｐ＜０．０５）。④结论Ｃａ２＋，Ｃｕ２＋和Ｚｎ２＋可能参与雌二醇诱发大鼠高血压     

红细胞铜锌超氧化物歧化酶与血清维生素C在糖尿病肾病时的变化

目的：探讨氧化与抗氧化在糖尿病肾病发生发展中的作用。方法：测定对照（Ｃ）组１５人及糖尿病蛋白尿正常（ＤＭⅠ）组、微量白蛋白尿（ＤＭⅡ）组、临床蛋白尿（ＤＭⅢ）组患者共５６例的红细胞铜，锌超氧化物歧化酶（ＳＯＤ）及血清维生素（ＶｉｔＣ）。结果：ＳＯＤ与尿白蛋白排泄率（ＵＡＥＲ）呈明显负相关，ＤＭⅡ组明显高于Ｃ、ＤＭⅠ组，低于ＤＭⅢ组（Ｐ＜０．０１）；ＶｉｔＣ与ＵＡＥＲ呈明显负相关（Ｐ＜０．０１），但ＤＭⅠ与Ⅱ组，ＤＭⅡ、Ⅲ组间Ｐ＞０．０５；ＳＯＤ、ＶｉｔＣ与ＨｂＡ１Ｃ间呈负相关，前者Ｐ＜０．０１，后者Ｐ＞０．０５。结论：抗氧化能力下降可能是糖尿病发生肾脏损伤的原因之一，并可反映损伤程度。     

羟乙基淀粉及动脉灌注法结合持续低流量灌注对兔心肺联合保存的作用

目的研究胶体物质羟乙基淀粉（ＨＥＳ）及低流量灌注技术（ＬＦＰ）对兔心肺联合保存的作用。方法选用健康家兔５０只，２只用于正常心肺组织的超微结构观察，４８只随机均分为晶体液（ＣＳ）组、ＨＥＳ组及ＬＦＰ组，每组８对供、受体。用Ｓｔ．Ｔｈｏｍａｓ液及改良Ｅｕｒｏ－Ｃｏｌｌｉｎｓ液灌注ＣＳ组心、肺，含５％ＨＥＳ的Ｓｔ．Ｔｈｏｍａｓ液及改良Ｅｕｒｏ－Ｃｏｌｌｉｎｓ液灌注ＨＥＳ组及ＬＦＰ组心、肺，取心与左肺整体４℃保存７ｈ，保存期间ＬＦＰ组经主、肺动脉持续低流量（０．２５ｍｌ／ｇ心肺重量／ｈ）灌注４℃相应保存液。移植后每３０ｍｉｎ测定供体心左室收缩压（ＬＶｓｐ）、左室舒张末压（ＬＶｅｄｐ）、右房压（ＲＡＰ）及供体肺气道峰压（Ｐａｗ），取动脉血测氧分压（ＰａＯ２），实验结束时记录异丙肾上腺素用量，计算心肺重量增值，测定心肺组织丙二醛（ＭＤＡ）含量，取心肺组织观察超微结构。结果ＣＳ组心肺重量增值高于ＨＥＳ组（Ｐ＜０．０１），ＨＥＳ组与ＬＦＰ组无明显差异。ＣＳ组ＬＶｓｐ均低于ＨＥＳ组（Ｐ＜０．０５或＜０．０１），３０，６０ｍｉｎ时ＬＦＰ组高于ＨＥＳ组（Ｐ＜０．０５）。ＣＳ组ＬＶｅｄｐ均高于ＨＥＳ组（Ｐ＜０．０５或Ｐ＜０．０１）     

银屑病病人血清骨钙素检测

①目的探讨银屑病病人骨组织代谢的变化。②方法应用放免分析法及ＥＤＴＡ滴定法测定４６例寻常型银屑病及３６例其他轻症皮肤病病人的血清骨钙素（Ｏｃ）、甲状旁腺素（ＰＴＨ）和钙离子（Ｃａ２＋）的含量。③结果银屑病组血清Ｏｃ水平明显高于对照组（ｔ＝３．０２４，Ｐ＜０．０１），血清ＰＴＨ及Ｃａ２＋水平低于对照组（ＰＴＨ：ｔ＝２．４３１，Ｐ＜０．０５；Ｃａ２＋：ｔ＝２．１５３，Ｐ＜０．０５）。④结论银屑病病人的骨组织代谢存在异常。     

外周血髓过氧化物酶的水平对重症病人病情分析

目的：探讨外周血髓过氧化物酶（ＭＰＯ）水平对重症病人病情严重程度及预后状况的临床价值。方 法：选择 ２０１７－０１～ ２０１８－１２ 在我院诊治的 １２０ 例重症病人，检测病人外周血 ＭＰＯ 水平，并记录病人 ２４ ｈ 急性生 理学与慢性健康状况Ⅱ（ＡＰＡＣＨＥ Ⅱ）评分，根据病人的 ＡＰＡＣＨＥ Ⅱ分值将病人分为高危组（ｎ ＝ ３４）、中危组（ｎ ＝ ４８）和低危组（ｎ＝ ３８），分析 ＭＰＯ 与 ＡＰＡＣＨＥ Ⅱ评分的相关性，并采用多因素 Ｌｏｇｉｓｔｉｃ 回归分析 ＭＰＯ 对病人 ２８ ｄ 死亡率的影响。结果：ＭＰＯ 水平与 ＡＰＡＣＨＥⅡ评分呈正相关（ｒ ＝ ０．１４５，Ｐ ＝ ０．００９）；治疗 ２８ ｄ 后，死亡组病 人的 ＭＰＯ 水平、ＡＰＡＣＨＥⅡ评分及 ＩＣＵ 住院时间均明显高于存活组（Ｐ＜０．０５）；经 Ｌｏｇｉｓｔｉｃ 多因素分析外周血 ＭＰＯ 水平及 ＡＰＡＣＨＥⅡ评分是影响重症病人病死率的独立危险因素（Ｐ＜０．０５）。结论：重症病人外周血 ＭＰＯ 水 平与 ＡＰＡＣＨＥ Ⅱ评分呈正相关，是导致病人死亡的独立危险因素，可作为评估重症病人病情严重程度及预后状 况的参考指标。     

牛磺酸对小鼠脾细胞DNA损伤的影响

目的探讨牛磺酸对紫外线所致小鼠脾细胞ＤＮＡ损伤的影响。②方法小鼠饲料中分别添加牛磺酸、维生素Ｃ（ＶｉｔＣ）和维生素Ｅ（ＶｉｔＥ）喂养１１２ｄ后,荧光法（ＦＡＤＵ法）检测小鼠脾细胞ＤＮＡ链的断裂程度,并与对照组比较。③结果紫外线照射前,小鼠脾细胞ＤＮＡ链断裂程度各组间差异无显著性（Ｆ＝０．８７５６,Ｐ＞０．０５）;紫外线照射后,牛磺酸、ＶｉｔＣ,ＶｉｔＥ各组脾细胞ＤＮＡ双链剩余率高于对照组,差异均有显著性（Ｆ＝２０．４５,ｑ＝３．０１～４．０８,Ｐ均＜０．０５）。④结论牛磺酸可减轻紫外线对小鼠脾细胞ＤＮＡ分子的损伤。     

复方丹参和苓桂术甘汤对缺氧所致心钠素和抗利尿激素释放的影响

①目的寻找特异性地影响心钠素（ＡＮＰ）与抗利尿激素（ＡＤＨ）释放的药物。②方法采用急性缺氧动物模型，观察中药复方丹参和苓桂术甘汤对ＡＮＰ与ＡＤＨ释放及肺指数的影响。实验分为常氧对照组和急性缺氧组，后者包括未用药组、复方丹参组和苓桂术甘汤组。③结果未用药组缺氧后ＡＮＰ和ＡＤＨ均有明显升高（ｔ１＝１．９１６，ｔ２＝２．３０１，Ｐ均＜０．０５）；复方丹参组和苓桂术甘汤组缺氧后ＡＮＰ下降（ｔ１＝２．４０２，ｔ２＝２．０９０，Ｐ均＜０．０５）。该两组与未用药组相比较有显著变化（ｔ１＝２．５６５，ｔ２＝２．１４４，Ｐ均＜０．０５）。两用药组缺氧后血浆ＡＤＨ与缺氧前比较无显著变化，但明显低于未用药组（ｔ１＝１．９３５，ｔ２＝２．１１５，Ｐ均＜０．０５）。未用药组肺指数较常氧对照组明显升高（ｔ＝３．０２９，Ｐ＜０．０１），复方丹参组和苓桂术甘汤组肺指数显著低于未用药组（ｔ１＝３．６４５，ｔ２＝３．３７５，Ｐ均＜０．０１）。④结论复方丹参和苓桂术甘汤可抑制急性缺氧所致的ＡＮＰ和ＡＤＨ的释放。     

大剂量猪肺表面活性物质对盐酸吸入性肺损伤家兔血气及肺顺应性的影响

目的探讨大剂量外源性ＰＳ对家兔盐酸吸入性肺损伤的治疗作用。方法健康家兔２０只,气管内注入盐酸复制盐酸吸入肺损伤模型,分为２组：Ａ组（ｎ＝１０）为ＰＳ治疗组,气管内注入３７℃ＰＳ１００ｍｇ／ｋｇ;Ｂ组：（ｎ＝１０）为治疗对照组,气管内注入同等体积的生理盐水,观察ＰＳ对动脉血气和肺顺应性的影响。另设Ｃ组（ｎ＝８）,在Ａ、Ｂ组动物模型复制及治疗相应时间气管内注入同等体积的生理盐水作为ＰＳ疗效的对照。结果Ａ组ＰＳ治疗后各时间点ＰａＯ２高于Ｂ组（Ｐ＜０．０５）,但多数时间点仍低于Ｃ组（Ｐ＜０．０５）;Ａ组各时间ＰａＣＯ２均低于Ｂ组（Ｐ＜０．０１）,治疗早期高于Ｃ组（Ｐ＜０．０５）;Ａ组动脉血ｐＨ值均低于Ｂ组,但Ｐ＞０．０５,与Ｃ组相比无差异（Ｐ＞０．０５）;Ａ组肺动、静态顺应性均优于Ｂ组（Ｐ＜０．０５）,但仍低于Ｃ组（Ｐ＜０．０１）。结论大剂量猪肺表面活性物质可以明显地提高ＰａＯ２,降低ＰａＣＯ２,并且阻止动脉血ｐＨ的进一步下降,改善肺动、静态顺应性,对家兔盐酸吸入肺损伤具有治疗作用,为临床胃液误吸性肺损伤的治疗提供了一种新方法     

多囊卵巢综合征患者糖耐量试验前后血中活性物质测定

为了研究多囊卵巢综合征（ＰＣＯＳ）的黄体生成素（ＬＨ）及胰岛素升高与神经肽的关系，我们检测了正常组（ｎ＝１５）、１型患者组（ＬＨ／ＦＳＨ≥３，ｎ＝３０）和２型患者组（ＬＨ／ＦＳＨ＜３，ｎ＝２５）糖耐量试验（ＯＧＴＴ）前后外周血中胰岛素、生长抑素（ｓｏｍａｔｏｓｔａｔｉｎ，ＳＳ）、β－内啡呔（β－ｅｎｄｏｒｐｈｉｎ，β－ＥＰ）和强啡呔Ａ（ｄｙｎｏｒｐｈｉｎＡ，ＤｙｎＡ）浓度的变化。结果在基础状态下，１型组的ＬＨ与ＳＳ有负相关性（ｒ＝－０．５１，Ｐ＜０．０５），２型组ＬＨ与β－ＥＰ也有负相关性（ｒ＝－０．４９，Ｐ＜０．０５）；ＯＧＴＴ后，１型组β－ＥＰ和ＤｙｎＡ较对照组升高，２型组的ＳＳ较对照组有相对不足。表明内源性ＳＳ不足及β－ＥＰ和ＤｙｎＡ升高可能导致了ＰＣＯＳ的ＬＨ及胰岛素的升高     

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.