WWOX基因对人急性淋巴细胞性白血病细胞CCRF-CEM细胞凋亡及细胞周期的影响

目的:研究WWOX基因对人急性淋巴细胞性白血病细胞CCRF-CEM细胞凋亡及细胞周期的影响及分子机制。方法:体外培养CCRF-CRM细胞系，将WWOX基因转染入CCRF-CEM细胞，建立高表达WWOX的CCRF-CEM细胞，流式细胞仪法测定CCRF-CEM细胞的细胞周期和凋亡，Western blot法测定WWOX基因、细胞周期和凋亡相关因子的蛋白表达，qRT-PCR法测定caspase-3的mRNA表达。结果:与对照组和空白质粒组相比，转染入WWOX的CCRF-CEM细胞的WWOX蛋白表达显著增加，G0/G1期的细胞比例显著增加，凋亡细胞比例显著增加；CCRF-CEM细胞中cyclin D1、cyclin E、CDK2的蛋白表达显著降低而Wnt-5α和JNK的蛋白表达显著增加，caspase-3的mRNA表达促进CCRF-CEM细胞的凋亡。结论:WWOX基因在急性淋巴细胞性白血病CCRF-CEM细胞中发挥抑癌基因作用，可以有效促进细胞凋亡并抑制细胞周期进程。     

Matteucens I-J,phenolics from the rhizomes of Matteuccia orientalis

Two new phenolics, named matteucens I-J (1-2), were isolated from the 60% EtOH extract of the rhizomes of Matteuccia orientalis (HOOK.) TREV. Their structures were elucidated by means of extensive spectroscopic analysis (HRESIMS, NMR).     

左炔诺孕酮宫内节育系统预防子宫内膜异位症复发的临床疗效

目的探讨左炔诺孕酮宫内节育系统(LNG-IUD)用于卵巢子宫内膜异位症保守性手术后的疗效、安全性以及复发情况。方法选取72例进行卵巢子宫内膜异位症保守性手术的患者作为研究对象,其中36例于术后第1次月经来潮予以放置LNG-IUD,另36例术后应用促性腺激素释放激素激动剂(GnRH-a)、中成药或未采取任何措施,于术后第3、6、12月观察其卵巢大小、卵巢功能、内膜厚度、糖类抗原125(CA125)、人附睾蛋白4(HE4)以及其痛经等情况的变化。结果 LNG-IUD可有效的预防卵巢子宫内膜异位囊肿腹腔镜保守性手术后的术后复发,同时可以缓解痛经、减少月经量、降低CA125水平,且对卵巢功能无影响。结论 LNG-IUD适用于预防卵巢子宫内膜异位症复发且患者依从性好。     

Nose-to-brain delivery of temozolomide-loaded PLGA nanoparticles functionalized with anti-EPHA3 for glioblastoma targeting

Glioblastoma is the most common malignant brain tumor. Efficient delivery of drugs targeting glioblastomas remains a challenge. Ephrin type-A receptor 3 (EPHA3) tyrosine kinase antibody-modified polylactide-co-glycolide (PLGA) nanoparticles (NPs) were developed to target glioblastoma via nose-to-brain delivery. Anti-EPHA3-modified, TBE-loaded NPs were prepared using an emulsion-solvent evaporation method, showed a sustained in vitro release profile up to 48 h and a mean particle size of 145.9 ± 8.7 nm. The cellular uptake of anti-EPHA3-modified NPs by C6 cells was significantly enhanced compared to that of nontargeting NPs (p < .01). In vivo imaging and distribution studies on the glioma-bearing rats showed that anti-EPHA3-modified NPs exhibited high fluorescence intensity in the brain and effectively accumulated to glioma tissues, indicating the targeting effect of anti-EPHA3. Glioma-bearing rats treated with anti-EPHA3-modified NPs resulted in significantly higher tumor cell apoptosis (p < .01) than that observed with other formulations and prolonged the median survival time of glioma-bearing rats to 26 days, which was 1.37-fold longer than that of PLGA NPs. The above results indicated that anti-EPHA3-modified NPs may potentially serve as a nose-to-brain drug carrier for the treatment of glioblastoma.     

新等位基因人类白细胞抗原B*15:133的鉴定及其原核表达

背景:国际上至2010-04共报告人类白细胞抗原4 633个等位基因,中国自2000年至少发现200个新的等位基因,由于资金和时间有限,大部分新等位基因未作血清分型、家系研究以及进一步的功能性研究.目的:在健康志愿者人群中发现新等位基因,并对其进行家系研究,同时构建重链胞外区多肽的原核细胞表达载体,鉴定其在原核细胞中是否表达.方法:利用PCR-SSO和PCR-SBT技术,对人群的人类白细胞抗原进行筛选.使用血清学和SBT技术对拥有新等位基因的供者进行家系分析.用分子克隆的方法构建表达载体转染原核细胞,运用Western-blot鉴定是否表达.结果与结论:发现一个新等位基因与人类白细胞抗原B*15:18:01在第419位相差一个核苷酸,C->T, 即Codon116位 TCC->TTC,导致氨基酸由丝氨酸改变成苯丙氨酸.最终确定命名为人类白细胞抗原B*15:133.血清学表达B71(70)抗原.发现此供者的新等位基因来自于母亲.表达载体pET30a(+)- B*15:133在原核细胞中表达的多肽可被抗HIS标签单克隆抗体特异性识别.结果表明,使用分子生物学技术在大样本的筛查下发现了新等位基因人类白细胞抗原B*15:133,利用分子克隆的方法成功构建表达载体pET30a(+)- B*15:133,并在原核细胞中有大量高纯度蛋白表达.     

Micropatterns of Non‐Circular Droplets of Nanostructured PS‐b‐PEO Copolymer by Solvent‐Assisted Wetting on a Chemically Periodic Surface

A method to fabricate micropatterns of non‐circular droplets of a self‐assembled block copolymer by solvent‐assisted wetting on chemically periodic surface is presented. The block copolymer is dewetted on a topographic pre‐pattern to form an array of microdroplets with a sphere‐capped shape and circular contact line. The droplets are then transferred onto a chemically periodic Au line pattern microcontact‐printed with two types of self‐assembled monolayers (SAMs). Solvent vapor application provides sufficient mobility to the block copolymer molecules to induce spreading of the transferred droplets, resulting in two types of non‐circular microdroplet growth. The growth behavior depends on the size of initial droplets relative to periodic line width and on the initial registries of as‐transferred droplets.