Molecular cloning and expression of a new gene,GON-SJTU1 in the rat testis

Background

A prolonged latent phase is independently associated with an increased incidence of subsequent labor abnormalities. We aimed to compare between oxytocin augmentation, amniotomy and a combination of both on the duration of labor among women with a prolonged latent phase.

Methods

Women with a singleton fetus in cephalic presentation who have a prolonged latent phase, were randomly allocated to amniotomy (group 1), oxytocin (group 2) or both (group 3). A group of women who progressed spontaneously without intervention composed the control group (group 4). The primary outcome was the duration of time from initiation of augmentation until delivery.

Results

A total of 213 women were consented and randomized to group 1 (70 women), group 2 (72 women) and group 3 (71 women). Group 4 was composed from additional 70 women. A mean reduction of 120 minutes in labor duration was observed among group 3 compared to group 1 (p = 0.08) and 180 minutes compared to group 2 and 4 (p = 0.001). Women in group 3 had a shorter length of time from augmentation until the beginning of the active phase and a shorter first stage of labor than group 1 (p = 0.03), group 2 (p = 0.001) and group 4 (p = 0.001). Satisfaction was greater among group 3 and 4. Mode of delivery and neonatal outcome were comparable between the groups.

Conclusion

Labor augmentation by combined amniotomy and oxytocin among women with a prolonged latent phase at term seems superior compared to either of them alone.     

DUSP1在药物诱导的肝癌细胞衰老中的表达变化及其作用研究

目的:在肝癌的治疗中,化学疗法是重要的治疗手段,尤其在结合外科手术切除的联合治疗中,化疗被广泛的应用于临床。而体内试验证实,化疗药物诱导的细胞衰老在治疗肿瘤的过程中,普遍存在并发挥重要作用,我们着重探讨在药物诱导的人肝癌细胞衰老中,细胞内重要信号途径的变化,发现并利用对细胞衰老有重要意义的蛋白,增强化学治疗肿瘤的效果。在本课题中,我们利用化疗药物阿霉素(doxorubicin)和蛋白酶体抑制剂MG132诱导的人衰老肝癌细胞模型,对MAPK信号途径的负调控因子DUSP家族的表达变化进行检测,筛选表达水平发生显著变化的双特异性磷酸酶(DUSP)家族成员,并初步探讨其在细胞衰老中的作用。方法:利用低剂量的阿霉素和蛋白酶体抑制剂MG132诱导人肝癌细胞衰老;通过Real time RT-PCR和Western blotting检测DUSP家族基因mRNA和蛋白质水平的变化;利用siRNA干扰技术敲降DUSP1,检测药物诱导肝癌细胞衰老水平的变化。结果:经低剂量的阿霉素和蛋白酶体抑制剂短时间处理后,人肝癌细胞系Huh7和SMMC-7721细胞发生明显的细胞衰老;在诱导的衰老细胞中,DUSP1mRNA和蛋白质水平呈显著升高。在敲降DUSP1后,MG132诱导的细胞衰老得到显著的缓解。结论:DUSP1在药物诱导的人肝癌细胞衰老中具有重要的作用,为研究临床治疗中化疗药物引起肿瘤细胞衰老的具体机制带来启发。     

髓性TGF-β受体Ⅱ敲除鼠的建立及其巨噬细胞表型的初步分析

目的:建立髓性TGF-β受体Ⅱ (TβRⅡ)敲除鼠模型并对其巨噬细胞表型进行了初步分析.方法:利用溶菌酶M启动子-重组酶转基因鼠(lysozyme M-Cre鼠)和TβRⅡ条件敲除鼠,建立定向髓性TβRⅡ敲除鼠,通过基因型检测、免疫细胞的分布组成,然后检测敲除鼠巨噬细胞细胞因子表达的变化及对肿瘤细胞凋亡的影响.结果:建立了髓性TβRⅡ敲除鼠,并初步证明,在肿瘤细胞上清刺激条件下,TβRⅡ敲除的巨噬细胞与对照细胞相比,CXCL1表达量下调.结论:TGF-β信号可调控巨噬细胞的CXCL1表达.     

Molecular cloning and expression of a new gene, GON-SJTU1 in the rat testis

Background  

Spermatogenesis is a complex process involving cell development, differentiation and apoptosis. This process is governed by a series of genes whose expressions are highly regulated. Male infertility can be attributed to multiple genetic defects or alterations that are related to spermatogenesis. The discovery, cloning and further functional study of genes related to spermatogenesis is of great importance to the elucidation of the molecular mechanism of spermatogenesis. It is also physiologically and pathologically significant to the therapy of male infertility.