前列腺素E2对未破裂卵泡黄素化综合征体外受精-胚胎移植结局的影响

目的 探讨前列腺素E2(PGE2)对未破裂卵泡黄素化综合征(LUFS)患者接受体外受精-胚胎移植(IVF-ET)助孕过程中卵母细胞、胚胎质量、受精率、卵裂率、妊娠率等结局的影响.方法 随机选择首次接受IVF-ET治疗的LUFS患者20例为LUFS组;同期就诊因男方或输卵管因素接受IVF-ET治疗的患者20例为对照组.2组均于HCG日留取血清测定雌二醇(E2)水平,并于取获卵日留取无血卵泡液测PGE2水平.结果 与对照组比较,LUFS患者卵泡液中PCE2水平明显降低(P<0.01),HCG日血清E2水平及获卵数、受精率、卵裂率、优质胚胎率及妊娠率均降低(P均<0.05).结论 PGE2可能影响LUFS患者卵子的发育、卵母细胞的质量,进而影响胚胎的质量,降低妊娠率.     

人骨肉瘤细胞系OS—732 CAM移植瘤中VEGF、bFGF的表达及意义

目的：研究人骨肉瘤细胞系OS－732血管生成相关作用。方法：应用鸡胚绒毛尿囊膜模型,通过解剖显微镜及透射电镜观察该细胞系促血管生成特点,并以免疫组化方法检测人骨肉瘤细胞系OS－732鸡胚绒毛尿囊膜移植瘤中血管内皮生长因子（vascular endothelial growth factor,VEGF),碱性成纤维细胞生长因子（Basic fibroblast growth factor,bFGF)的表达。结果：该细胞系具较强的诱导血管生成能力,解剖显微镜下可见血管辐辏现象,透射电镜下可见新生血管壁由单层内皮细胞构成,内皮细胞裂隙增宽,基底膜不完整,缺乏平滑肌成分,移植瘤组织发VEGF和bFGF均呈阳性表达,其中VEGF呈高表达。结论：肿瘤诱导的新生血管在病理,生理及形态功能方面都具有特征性,其诱导血管生成过程中可能有多种血管生长因子的共同参与,针对血管生长因子为靶点进行抗血管生成治疗对改善骨肉瘤预后可能具有重要意义。     

Cost-effectiveness analysis of different embryo transfer strategies in England

Objective  The objective of this study was to assess the cost-effectiveness of different embryo transfer strategies for a single cycle when two embryos are available, and taking the NHS cost perspective.
Design  Cost-effectiveness model.
Setting  Five in vitro fertilisation (IVF) centres in England between 2003/04 and 2004/05.
Population  Women with two embryos available for transfer in three age groups (<30, 30–35 and 36–39 years).
Methods  A decision analytic model was constructed using observational data collected from a sample of fertility centres in England. Costs and adverse outcomes are estimated up to 5 years after the birth. Incremental cost per live birth was calculated for different embryo transfer strategies and for three separate age groups: less than 30, 30–35 and 36–39 years.
Main outcome measures  Premature birth, neonatal intensive care unit admissions and days, cerebral palsy and incremental cost-effectiveness ratios.
Results  Single fresh embryo transfer (SET) plus frozen single embryo transfer (fzSET) is the more costly in terms of IVF costs, but the lower rates of multiple births mean that in terms of total costs, it is less costly than double embryo transfer (DET). Adverse events increase when moving from SET to SET+fzSET to DET. The probability of SET+fzSET being cost-effective decreases with age. When SET is included in the analysis, SET+fzSET no longer becomes a cost-effective option at any threshold value for all age groups studied.
Conclusions  The analyses show that the choice of embryo transfer strategy is a function of four factors: the age of the mother, the relevance of the SET option, the value placed on a live birth and the relative importance placed on adverse outcomes. For each patient group, the choice of strategy is a trade-off between the value placed on a live birth and cost.