软产道异常致梗阻性难产及处理

软产道由子宫体、子宫下段、宫颈、盆底软组织、阴道、外阴构成。生殖器官的病变可导致难产，盆腹腔的包块可以引起产道的梗阻而发生难产，其发作率均较低。软产道异常多在产前诊断，部分孕产妇临产后方才发现，也有极少数直至分娩时才得以确诊。因此，易造成不良后果。生殖器官病变可由先天性发育畸形和后天疾病所引起；盆腹腔内病变包括卵巢、肠道、膀胱等器官的肿瘤。     

45例正常人听觉诱发电位P50的分析

目的 利用诱发电位技术探讨正常人听觉P50特征.方法 应用美国Nicolet Bravo脑电生理仪,采用条件刺激(S1)-测试刺激(S2)模式对45名健康受试者作了听觉P50检测.结果 分析了基本波型,提出了Cz和Pz区域P50诸指标平均值.结论 听觉P50电位具有抑制性特征,其变化可反映大脑正常感觉门的功能状态.P50较佳表达式是波幅S1-S2和100(1-S2/S1)两种结合,能直接显示感觉门的程度.此正常值可供抑郁症研究时参考.     

高浓度氨基酸对肿瘤细胞体外增殖的影响

本研究首先采用Hanks溶液作为介质,观察了不同氨基酸浓度(1～5mmol/L)对艾氏腹水癌细胞、瓦克癌肉瘤256细胞体外增殖的影响,然后以含有平衡氨基酸组成的Eagle最低必需培养基作为介质进一步观察了不同氨基酸浓度的增加对艾氏腹水癌细胞及人肝癌细胞(PLC/PRF/5)、肺癌细胞(AGTJ-a)体外增殖的影响,同时采用小鼠骨髓细胞观察了高浓度氨基酸对正常组织细胞可能产生的毒性作用。结果表明,尽管一些氨基酸浓度的增加有显著作用,但是不同肿瘤细胞对不同氨基酸浓度增加的反应不尽一致,而且一些氨基酸的作用受培养介质的明显影响;高浓度色氨酸对小鼠骨髓细胞的体外增殖有显著抑制作用。     

复杂区域疼痛综合征的研究进展

复杂区域疼痛综合征（complex regional pain syndrome,CRPS）是一种局部性的神经病理性疼痛,其发病机制尚不明确。目前认为,CRPS的产生是多因素的,早期诊断和治疗可改善其预后。文章就近年来CRPS的流行病学、发病机制、临床诊断及治疗方法的最新研究进展进行综述。     

Targeting NF-κB c-Rel in regulatory T cells to treat corneal transplantation rejection

The relevance of Tregs in the induction of tolerance against corneal allografts has been well established. Although it is well known that the conversion of Tregs into effector-like cells contributes to the loss of corneal immune privilege, the underlying mechanism is still not fully understood. Using heterologous penetrating keratoplasty model, we found that Tregs from corneal allograft rejected mice (inflam-Tregs) exhibit impaired function and characteristics of effector T cells. Further study showed that the expression of NF-κB c-Rel, a key mediator of effector T cell function, was significantly increased in inflam-Tregs. Mechanistic study revealed that elevated NF-κB c-Rel level in inflam-Tregs impaired Treg function through the promotion of inflammatory cytokine production and glycolysis. More importantly, we demonstrated that targeting NF-κB c-Rel was able to improve the immune suppressive function of inflam-Tregs in vitro and enhance the potential of them to suppress corneal transplantation rejection. Therefore, our current study identified NF-κB c-Rel as a key mediator of the conversion of Tregs into effector-like cells when under inflammatory environment.     

应用4650Ⅰ型压缩机雾化器进行支气管激发试验的研究

为了解Models 4650Ⅰ型压缩机雾化器(简称M)进行支气管激发试验的可行性,将92例支气管哮喘患者按用M雾化吸入时间的不同,分为1、1.5、2分钟三组,并与标准雾化装置Dosimeter及雾化器(简称D)进行支气管激发试验同步对比研究.结果显示 ,三组受试者用两种雾化装置所获测值间无显著性差异(P＞0.2～0.5),且皆呈直线正相关.M与D皆雾化吸入1分钟时,M所需药物浓度大于D,相关系数(0.285)偏低,延长M的雾化吸入时间至1.5分钟,与D雾化吸入1分钟相比,两者差值最小(-0.075 g/L), r =0.665;若再延长M雾化吸入时间,与D的差值又会扩大.提示:M雾化效果稍差于D,适当延长时间可弥补上述差异,建议M雾化吸入时间以1.5分钟为宜.     

脑诱发电位辅助诊断阿尔茨海默病 和精神分裂症价值研究

目的探讨脑诱发电位（ｂｒａｉｎｅｖｏｋｅｄｐｏｔｅｎｔｉａｌｓ,ＢＥＰｓ）对阿尔茨海默病（Ａｌｚｈｅｉｍｅｒｓｄｉｓｅａｓｅ,ＡＤ）和精神分裂症的辅助诊断价值。方法应用逐步判别分析法,分析３９例ＡＤ、３２例老年慢性精神分裂症患者和４０例正常人的４项ＢＥＰｓ主成分指标。结果４项ＢＥＰｓ均有指标入选判别方程。ＢＥＰｓ指标在正常人组和ＡＤ组间的判别准确性为９３８５％;在正常人组和精神分裂症组间的判别准确性为９５７１％;在２组患者间的判别准确性为８８８９％;在三组被试者间的判别准确性为８５５７％。结论脑诱发电位对临床诊断Ａｌｚｈｅｉｍｅｒ病和精神分裂症有参考价值。     

Antisense inhibition of methylenetetrahydrofolate reductase reduces cancer cell survival in vitro and tumor growth in vivo.

PURPOSE: Many cancer lines are methionine dependent and decrease proliferation when methionine supply is limited. Methylenetetrahydrofolate reductase (MTHFR) generates the folate derivative for homocysteine remethylation to methionine. We investigated the effect of antisense-mediated inhibition of MTHFR on survival of human cancer cells. EXPERIMENTAL DESIGN: We examined the in vitro and in vivo anticancer effects of a combination of MTHFR antisense and standard cytotoxic drugs. RESULTS: Specific antisense against MTHFR (EX5) showed significant inhibitory effects on growth of human colon, lung, breast, prostate, and neuroblastoma tumor cells in vitro compared with that of the control oligonucleotide. Cytotoxic drugs (5-fluorouracil, cisplatin, or paclitaxel) potentiated the effect of EX5. In vivo, antisense alone or in combination with cytotoxic drugs inhibited the growth of human colon and lung carcinoma xenografts. In comparison with control oligonucleotide, treatment with EX5 inhibited growth of colon tumors and lung tumors by 60% and 45%, respectively. EX5 with 5-fluorouracil decreased growth of colon tumors by an additional 30% compared with EX5 alone, and EX5 with cisplatin decreased growth of lung tumors by an additional 40% compared with cisplatin alone. Growth inhibition by EX5 was associated with decreased amounts of MTHFR protein and with increased amounts of an apoptosis marker. CONCLUSIONS: Our results confirm that MTHFR inhibition decreases tumor growth and suggest that inhibition of MTHFR by antisense or small molecules may be a novel anticancer approach.     

并发高血压急性脑血管病病人脑微出血的研究

目的研究并发原发性高血压的不同脑血管病病人脑微出血(CMBs)的发生率、分布特点、严重程度,并分析CMBs与血压控制的关系。方法并发原发性高血压的脑卒中病人77例,包括脑出血组33例,脑梗死组44例;对照组34例,为同期住院的并发原发性高血压的非脑血管病病人。记录各组CMBs病灶的部位、数量及病人平时平均收缩压。结果脑出血组CMBs的发生率最高(63.6%),严重程度以中度和重度为主;其次为脑梗死组(31.8%),严重程度以轻度和中度为主;对照组发生率最低(8.8%),均为轻度。CMBs病灶共检出576个,位于脑叶211个(36.6%)、大脑半球深部326个(56.6%)、小脑幕下39个(6.8%)。CMBs病灶数量与病人平时平均收缩压呈正相关(r=0.791,P<0.01)。结论并发高血压的脑卒中特别是脑出血病人CMBs的发生率较高,并且病灶多见于深部脑组织。CMBs病灶数量与病人平时平均收缩压呈正相关,这提示血压控制对并发高血压的CMBs病人是非常重要的。