剑叶龙血树叶化学成分研究

目的对剑叶龙血树叶的化学成分进行研究。方法采用柱色谱技术进行分离纯化,利用理化性质及波谱方法对实验得到的单体化合物进行结构鉴定。结果共得到13个单体化合物,分别鉴定为异鼠李素(Ⅰ)、槲皮素(Ⅱ)、25(R)-螺甾烷-5烯-3-β-醇(Ⅲ)、纤细皂苷(Ⅳ)、25(R)-螺甾烷-5-烯-3β,14α-二醇(Ⅴ)、25(R)-螺甾烷-5-烯-3β,14α-二醇-3-O-β-D-葡萄吡喃糖苷(Ⅵ)、25(R)-螺甾烷-5-烯-3β,14α-二醇-3-O-α-L-鼠李吡喃糖基(1→4)-β-D-葡萄吡喃糖苷(Ⅶ)、25(R)-螺甾烷-14α-羟基-4-烯-3-酮(Ⅷ)、7β-羟基-谷甾醇-3-O-β-D-吡喃葡萄糖苷(Ⅸ)、β-豆甾醇(Ⅹ)、豆甾醇-3-O-β-D-葡萄糖苷(Ⅺ)、胡萝卜苷(ⅩⅡ)、β-甲基葡萄糖苷(ⅩⅢ)。结论剑叶龙血树叶的主要成分为螺甾类化合物。化合物Ⅰ~Ⅲ、Ⅴ、Ⅵ、Ⅷ、Ⅸ均为首次从该植物中得到。     

鬼针草有效成分的研究(Ⅱ)

目的 研究鬼针草Bidens bipinnata的地上部分的化学成分。方法 采用硅胶、ODS柱色谱分离并结合Sephadex LH-20和HPLC分离纯化，通过理化鉴定和波谱分析鉴定其化学结构。结果 从鬼针草的正丁醇部位得到6-O-β-D-吡喃葡萄糖基-6，7，3′，4′-四羟基噢哢(海生菊苷)(Ⅰ)、6-O-(6″-乙酰基-β-D-吡喃葡萄糖基)-6，7，3′，4′-四羟基噢哢(Ⅱ)、槲皮素3-O-β-D-吡喃葡萄糖苷(Ⅲ)、槲皮素3-O-α-L-鼠李糖苷(Ⅳ)、异奥卡宁-7-O-β-D-吡喃葡萄糖苷(Ⅴ)、七叶苷(Ⅵ)、(E)2-己烯基-O-β-D-吡喃葡萄糖苷(Ⅶ)、正己烷基O-β-D-吡喃葡萄糖苷(Ⅷ)、异戊基O-β-D-吡喃葡萄糖苷(Ⅸ)、正丁基O-α-D-呋喃果糖苷(Ⅹ)、正丁基O-β-D-呋喃果糖苷(Ⅺ)、正丁基O-β-D-吡喃果糖苷(Ⅻ)。结论 以上12个化合物中除海生菊苷和异奥卡宁-7-O-β-D-吡喃葡萄糖苷外，其他10个化合物均为首次从鬼针草中分离得到。     

龙葵全草皂苷类化学成分研究

目的研究龙葵Solanum nigrum全草的皂苷类化学成分。方法采用硅胶、反相ODS开放柱色谱及反相HPLC等手段分离化合物,运用波谱技术分析确定化学结构。结果龙葵全草60%乙醇提取物经D-101大孔树脂柱吸附,获得的60%乙醇洗脱部分再经分离得到8个化合物。利用理化及波谱分析确定这些化合物结构分别为uttroside B(Ⅰ)、uttroside A(Ⅱ)、22α,25R-26-O-β-D-吡喃葡萄糖基-22-羟基-呋甾-Δ5-3β,26-二醇-3-O-β-D-吡喃葡萄糖基-(1→2)-O-[β-D-吡喃木糖基-(1→3)]-O-β-D-吡喃葡萄糖基-(1→4)-O-β-D-吡喃半乳糖苷(Ⅲ)、22α,25R-26-O-β-D-吡喃葡萄糖基-22-甲氧基-呋甾-Δ5-3β,26-二醇-3-O-β-D-吡喃葡萄糖基-(1→2)-O-[β-D-吡喃木糖基-(1→3)]-O-β-D-吡喃葡萄糖基-(1→4)-O-β-D-吡喃半乳糖苷(Ⅳ)、5α,22α,25R-26-O-β-D-吡喃葡萄糖基-22-羟基-呋甾-3β,26-二醇-3-O-β-D-吡喃葡萄糖基-(1→2)-O-[β-D-吡喃葡萄糖基-(1→3)]-O-β-D-吡喃葡萄糖基-(1→4)-O-β-D-吡喃半乳糖苷(Ⅴ)、5α,22α,25R-26-O-β-D-吡喃葡萄糖基-22-甲氧基-呋甾-3β,26-二醇-3-O-β-D-吡喃葡萄糖基-(1→2)-O-[β-D-吡喃葡萄糖基-(1→3)]-O-β-D-吡喃葡萄糖基-(1→4)-O-β-D-吡喃半乳糖苷(Ⅵ)、dumoside(Ⅶ)、5α,20S-3β,16β-二醇-孕甾-22-羧酸-(22,16)-内酯-3-O-β-D-吡喃葡萄糖基-(1→2)-O-[β-D-吡喃木糖基-(1→3)]-O-β-D-吡喃葡萄糖基-(1→4)-O-β-D-吡喃半乳糖苷(Ⅷ)。结论化合物Ⅲ～Ⅷ为首次从该属植物中分离得到。     

山核桃树皮化学成分研究

目的 研究山核桃树皮化学成分.方法 利用硅胶柱色谱及重结晶等方法进行分离纯化,通过理化性质及波谱分析鉴定结构.结果 得到15个化合物,鉴定为:4,8-二羟基萘酚-1-O-β-D-(6'-乙酰氧基)吡喃葡萄糖苷(Ⅰ)、双氢山柰酚(Ⅱ)、胡桃醌(Ⅲ)、胡萝卜苷(Ⅳ)、山柰酚(Ⅴ)、4,8-二羟基萘酚-1-O-β-D-[6-O-(3",5"-二甲氧基-4"-羟基苯甲酰基)]吡哺葡萄糖苷(Ⅵ)、山柰酚-3-O-α-L-鼠李糖苷(Ⅶ)3,3'-二甲氧基鞣花酸(Ⅷ)、柚皮素(Ⅸ)、槲皮索(Ⅹ)、4,8-二羟基四氢萘醌(Ⅺ)、槲皮素-3-O-α-L-鼠李糖苷(Ⅻ)、柚皮素-7-O-β-D-葡萄糖苷(XⅢ)、4,8-二羟基萘酚-1-O-β-D-吡喃葡萄糖苷(XⅣ)、4,5,8-三羟基-α-四氢萘醌-5-O-β-D-[6'-O-(3",5"-二甲氧基-4"-羟基苯甲酰基)]吡喃葡萄糖苷(XⅤ).结论 化合物I为新化合物,命名为山核桃酚;化合物Ⅰ、Ⅶ～Ⅸ、Ⅷ、XⅢ系首次从该属植物中得.     

少药八角果实中的黄酮类成分研究

目的分离并鉴定少药八角Illicium oligandrum果实中的黄酮类成分。方法利用硅胶柱色谱、凝胶(Sephadex LH-20)柱色谱和ODS反相柱色谱等方法进行分离和纯化,应用核磁共振和质谱等现代波谱技术进行结构鉴定。结果从少药八角果实的95%乙醇提取物中分离得到11个黄酮类化合物,分别鉴定为:山柰酚(Ⅰ)、槲皮素(Ⅱ)、槲皮素-3-O-β-D-半乳吡喃糖苷(Ⅲ)、异=鼠李素-3-O-β-D-葡萄吡喃糖苷(Ⅳ)、槲皮素-3-O-α-L-阿拉伯吡喃糖苷(Ⅴ)、槲皮素-3-O-α-L-鼠李吡喃糖苷(Ⅵ)、二氢槲皮素-3-O-α-L-鼠李吡喃糖苷(Ⅶ)、二氢山柰酚-3-O-α-L-鼠李吡喃糖苷(Ⅷ)、槲皮素-3-O-(6″-O-α-L-鼠李吡喃糖基)-β-D-葡萄吡喃糖苷(Ⅸ)、山柰酚-3-O-(6″-O-α-L-鼠李吡喃糖基)-β-D-葡萄吡喃糖苷(Ⅹ)、异鼠李素-3-O-(6″-O-α-L-鼠李吡喃糖基)-β-D-葡萄吡喃糖苷(Ⅺ)。结论11个化合物均为首次从该植物中分离得到,其中,化合物Ⅳ、Ⅴ、Ⅶ、Ⅷ、Ⅺ为首次从该属植物中分离得到。     

地榆炭化学成分的研究(Ⅱ)

目的 研究地榆炭的化学成分。方法 采用色谱技术进行分离、纯化,通过理化常数和波谱分析鉴定化合物结构。结果 从地榆炭中分离出11个化合物,分别为3β-羟基-28-去甲乌索-12,17-二烯-22-酮（1)、3β,19α-二羟基-齐墩果-12-烯-28-β-D-葡萄吡喃糖苷(2)、3β-O-α-L-阿拉伯糖基-乌索-12,19(29)-二烯-28-酸(3)、3β-O-α-L-阿拉伯糖基-乌索-12,18-二烯-28-酸(4)、3β-羟基-乌索-12,19-二烯-28-β-D-葡萄吡喃糖苷(5)、3β-羟基-乌索-12,18-二烯-28-β-D-葡萄吡喃糖苷(6)、3β-O-α-L-阿拉伯糖基-乌索-12,19(29)-二烯-28-β-D-葡萄吡喃糖苷(7)、3β-O-α-L-阿拉伯糖基-乌索-12,19-二烯-28-β-D-葡萄吡喃糖苷(8)、3β-O-α-L-阿拉伯糖基-乌索-12,18-二烯-28-β-D-葡萄吡喃糖苷(9)、3,4′-O-二甲基逆没食子酸(10)、没食子酸(11)。结论 化合物1为新化合物,命名为地榆皂苷元V,化合物2、5首次从地榆中分离得到。     

三桠苦叶的化学成分研究

【目的】研究三桠苦叶丙酮部位的化学成分。【方法】应用多种色谱方法进行分离和纯化,并利用核磁共振等方法解析化合物结构。【结果】从三桠苦叶丙酮部位中分离得到10个化合物,鉴定了7个化合物,它们的结构分别被鉴定为山奈酚(Ⅰ),槲皮素(Ⅱ),胡萝卜苷(Ⅲ),异鼠李素(Ⅳ),山奈酚-3-O-β-D-葡萄吡喃糖苷(Ⅴ),山奈酚-3-O-β-D-葡萄吡喃糖醛酸苷(Ⅵ),3,5,4’-三羟基-8,3’-二甲氧基-7-异戊烯氧基黄酮(Ⅶ)。【结论】化合物Ⅰ、Ⅱ、Ⅳ、Ⅵ为首次从该属植物中分离得到。     

红凤菜化学成分研究

目的 研究菊科三七草属植物红凤菜Gynura bicolor DC.地上部分的化学成分.方法 采用硅胶、凝胶柱色谱等方法 分离化合物,运用理化性质和现代光谱技术鉴定化合物的结构.结果 分离得到17个化合物,分别鉴定为:十八碳脂肪醇(Ⅰ)、十一碳脂肪酸(Ⅱ)、二十六碳脂肪酸(Ⅲ)、三十碳脂肪酸(Ⅳ)、己烷(Ⅴ)、对羟基苯甲酸(Ⅵ)、山柰酚(Ⅶ)、山柰酚-3-O-β-D-葡萄糖苷(Ⅷ)、高车前苷(Ⅸ)、山柰酚-3-O-β-D-吡喃葡萄糖基(6→1)-α-L-鼠李糖苷(Ⅹ)、槲皮素-3-O-β-D-吡喃葡萄糖基(6→1)-α-L-鼠李糖苷(Ⅺ)、槲皮素-双-3-O-β-葡萄糖苷(Ⅻ)、β-香树脂醇(Ⅻ)、α-香树脂醇(ⅩⅣ)、β-香树脂醇-3-O-β-葡萄糖苷(ⅩⅤ)、乙酰表木栓醇(ⅩⅥ)、β-谷甾醇(Ⅶ).结论 全部17个化合物均为首次从红凤菜中分离得到.     

凤尾茶的化学成分研究

目的 研究凤尾茶Elsholtzia bodinieri的化学成分。方法 利用Sephadex LH-20和MCI gel CHP20P柱色谱进行分离和纯化，通过理化方法及光谱分析鉴定其结构。结果 从凤尾茶水提液中分离得到5个化合物，分别鉴定为2，6-二甲基-8-羟基-2，6-辛二烯酸-8-O-β-D-葡萄吡喃糖苷(Ⅰ)、圣草素7-O-β-D-葡萄吡喃糖苷(Ⅱ)、木犀草素7-O-β-D-葡萄吡喃糖苷(Ⅲ)、山柰酚3-O-芦丁糖苷(Ⅳ)、芦丁(Ⅴ)。结论 化合物Ⅰ～Ⅴ均为首次从该植物中分离得到，其中Ⅰ为新化合物，命名为东紫苏苷(bodinierin)。     

云南血竭中的三个配糖体

从云南‘雨林牌’血竭Ｄｒａｃａｅｎａ ｃｏｃｈｉｎｃｈｉｎｅｎｂｓｉｓ （Ｌｏｕｒ．）Ｓ．Ｃ．Ｃｈｅｎ中分离鉴定了一个新的酚苷：３,４－二羟基烯丙基苯４－Ｏ－「α－Ｌ－鼠李吡喃糖基（１→６）」－β－Ｄ葡萄吡喃糖苷,２个已知的甾体皂苷：２６－Ｏ－β－Ｄ－葡萄吡喃糖夫甾烷－５,２０（２２）,２５（２７）－三烯－１β,３β,２６－三醇－１－Ｏ－「α－Ｌ－鼠李吡喃糖基（１→２）－α－Ｌ－葡萄吡喃糖基－呋甾     

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.