Analysis of differentially expressed genes in fetal skin of scarless and scar-forming periods of gestational rats

Objective: To study the differences of gene expression between earlier gestational skin and later gestational skin of rats with the aids of single primer amplification (SPA) and high-density oligonucleotide DNA array to understand the molecular mechanism of scarless healing. Methods: Total RNAs were isolated from fetal rat skin of the scarless (E15) and scar-forming (E18) periods of gestation (term =21.5 days). The RNAs from earlier gestational skin (EGS) and later gestational skin (LGS) were both reversely transcribed to cDNAs, then labeled with the incorporation of fluorescent dCTP for preparing the hybridization probes by SPA method. The mixed probes were then hybridized to the oligonucleotide DNA arrays which contained 5 705 probes representing 5 705 rat genes. After highly stringent washing, these DNA arrays were scanned for fluorescent signals to display the differentially expressed genes between the 2 groups of skin. Results: Among 5 705 rat genes, there were 53 genes (0.93%) with differentially expressed levels between EGS and LGS groups, 27 genes, including fibroblast growth factor 2 ( FGF2 ) and follistatin were up-regulated (0.47%) and 26 genes were down-regulated (0.46%) in fetal skin during scarless period versus scar-forming period. Higher expressions of FGF2 and follistatin in EGS than those in LGS were also revealed by RT-PCR method. Conclusions: High-density oligonucleotide DNA array provided a powerful tool for investigating differential gene expression in earlier and later gestational fetal skins. This technology validates that the mechanism of fetal scarless healing is very complicate and the change of many gene expressions is associated with fetal scarless healing.     

异基因骨髓移植后供者干细胞输注与供者淋巴细胞输注抗白血病作用的比较

异基因骨髓移植后白血病复发是一个重要的问题,其发生率达10%～36%.在疾病晚期和采用去T细胞移植的患者中复发率可高达70%以上[1],对于此类患者联合化疗效果差,而二次移植则只在晚期复发的患者中效果较好[2,3].一些研究者曾采用供者免疫活性细胞输注或使用人重组白细胞介素2来刺激供者造血或增强移植物抗白血病作用(graft-versus-leukemia,GVL)[4-6].我们报告了20例异基因骨髓移植后复发的白血病患者,对他们分别进行了无粒细胞集落刺激因子(G-CSF)动员的供者淋巴细胞(donor-derived lymphocyte,DDL)输注或G-CSF刺激后采集的供者干细胞(peripheral blood progenitor cell,PBPC)输注.     

子宫内膜癌153例临床分析

对１９７０～１９９１年收治的子宫内膜癌１５３例按最新ＦＩＧＯ分期法重新分期，认为新分期法较为合理。按１９８２年ＷＨＯ标准，重新复查了病理切片。子宫内膜癌Ｉ期１１９例（７７．３％），腺癌１１６例（７５．８％），且以Ｇ１、Ｇ２为主。总的５年生存率为８３．４３％。根据随访结果及临床病理特点，进行了单因素分析及多因素分析。结果显示，病理分级、肌层浸润、颈管累及与预后有关；淋巴转移也是重要的预后因素之一。     

16种抗生素在两种培养基上抑菌效果观察

细菌学纸片扩散法药物敏感试验的标准为Kirby-Bauer法，该法指定选用Mueller－Hinton琼脂（MHA）作为实验用培养基。为了解抗生素在普通营养琼脂（NA）和MHA培养基上抑菌效果的差异，我们选择了16种常用抗生素，对照观察了各种抗生素对某一菌株在这两种培养基上抑菌圈直径的差别。回材料和方法1．1材料氨于西林、校等西林、听拉西林、头抱哩琳、头抱拉定、头抱磷脂、头抱曲松、头抱响酮、头抱他定、庆大霉素、受市霉素、链霉素、阿米卡星、诺氟沙星、环丙沙星和氧氟沙星共16种。NA、MHA和药敏纸片，均采用杭州康壮生物工程公司产品。…     

亲电性对醌二甲烷与富电子烯烃的电荷转移聚合

概述了亲电性对醌二甲烷与富电子烯烃电荷转移聚合的最新进展，着重介绍聚合的一般特征、引发机理、链增长机理，以及单体结构、溶剂对聚合反应的影响。     

白领女性应该怎样抗疲劳

在紧张的工作和生活当中,你是不是经常莫名其妙地感觉到精疲力竭?调查发现,14%～27%的人常有这种感觉,其中女性疲劳者是男性的3倍。多数人把疲劳当成一种正常的生理反应,然而对疲劳的感受却因人而异,女性比男性更为敏感。育龄期的妇女当中缺铁性贫血的发生率很高,而贫血是原因不明疲劳症的重要原因之一。轻度的缺铁性贫血表现为容易疲乏、注意力不集中能力下降、怕冷、抵抗力下降等。     

寂寞的蛊毒

爱情的世界里，男人和女人相爱着，相爱的男女又相互着，于是爱与被爱，骗与被骗，真真假假，错综复杂，借你一双慧眼把真假看穿。[编者按]     

治痹一例

张××,女,55岁,农民。1984年5月8日诊。素患痹证。一月前因下田栽秧,次日即出现全身关节肌肉酸痛,逐渐加重,左膝红肿疼痛,不能屈伸,头晕,心悸,口渴,便结尿黄,形体消瘦。体温39.5℃,舌质黯,苔黄微腻,脉滑数。此乃体内素有蕴热,复感寒湿,蕴郁日久,化热化火,壅滞气血,变生关节不利诸证。治宜清热泻火,宣痹通络,兼祛风湿。处