小肠吸收胆固醇的分子生物学研究进展

胆固醇通过分布于十二指肠和近段空肠黏膜上皮细胞刷状缘膜的Niemann—Pick C1样蛋白1摄取，ATP结合盒G5、G8抑制小肠对胆固醇的摄取过程。进入上皮细胞的胆固醇大多数被乙酰辅酶A，胆固醇转乙酰基酶2酯化，随后通过组装形成乳糜微粒，经淋巴管进入血循环；另一部分胆固醇则以未酯化形式直接进入血循环形成高密度脂蛋白颗粒。这些过程受核受体——肝脏X受体的调控。年龄、性别、黏膜屏障和小肠传输速度也影响胆固醇的吸收。     

毛发疾病

雄激素和毛发生长；雄激素性脱发患者血清雄激素水平测定；肝肾不足型斑秃患者PBMC中Th1／TH2型细胞因子转录因子T-bet mRNA表达状况；油风治验三则；多毛症及其激光治疗的研究进展     

质子磁共振波谱在脑肿瘤中的应用进展

正确诊断脑肿瘤才能更好地对其处理和治疗。^1H MRS是获得肿瘤生化信息的非侵袭技术，其对传统的影像学技术提供了重要的补充。对于非肿瘤性病灶和不易手术切除而需放疗或化疗的肿瘤性病灶，无创伤并准确判断病灶性质的方法可取代不必要的活检。本文综述了^1H MRS在脑肿瘤分类和分级中的应用，观察肿瘤的治疗反应和肿瘤进展情况，是决定肿瘤治疗计划的重要分子影像学技术。     

p27kip1在宫颈癌组织中的表达及意义

目的 研究p27^kip1在宫颈癌组织中的表达并探讨其在宫颈癌发生发展过程中的变化及意义。方法 采用免疫组化SP法对57例浸润性宫颈癌(IC)、11例宫颈原位癌(CLS)、18例宫颈上皮重度不典型增生(SD)和15例正常宫颈组织(NE)进行了细胞周期蛋白依赖性激酶抑制剂(CDKI）p27^kip1的检测。结果 15例正常宫颈上皮中p27^kip1蛋白全部高表达，而在SD和CLS以及浸润性宫颈癌中，其蛋白表达水平随病变的发展呈现了有意义的下降。在宫颈癌进展期，p27^kip1表达与宫颈癌的临床分期、组织分级、淋巴结转移呈显著负相关，单因素生存分析显示p27^kip1蛋白高表达组生存率明显优于低表达组。结论 p27^kip1蛋白表达的下降参与了宫颈癌的发生发展。其蛋白水平检测是宫颈癌早期诊断及判定预后的一个有价值的指标。     

慢性移植物肾病治疗策略

本文主要阐述了免疫抑制剂应用，防治高血压，限制蛋白饮食，以及降低血脂、抗凝剂与中医中药在防治慢性移植物肾病中的作用。     

膀胱内给予BCG与丝裂霉素C预防Ta和T1期膀胱癌复发的比较

背景：Ta和T1期膀胱癌经尿道切除术（TUR）后的肿瘤复发是重要的临床问题.膀胱内给予丝裂霉素C（MMC）或BCG证明有预防作用,但两者都可引起局部和全身副作用.施行系统评价以比较这两种药物的效果.     

氯沙坦通过下调单核细胞趋化蛋白1受体表达抑制单核细胞活化

目的探讨血管紧张素Ⅱ对单核细胞趋化蛋白1受体CCR2表达的影响及氯沙坦的干预作用。方法人单核细胞株与血管紧张素Ⅱ(10-7mol/L)孵育,加或不加氯沙坦(10-7、10-6和10-5mol/L),检测上清液中单核细胞趋化蛋白1水平、单核和内皮细胞粘附情况以及CCR2mRNA的表达。结果与对照组比较,血管紧张素Ⅱ明显增加单核细胞培养上清液中单核细胞趋化蛋白1水平(26.46±3.58ng/L比10.56±2.34ng/L,P<0.01),增加单核内皮细胞间粘附(596±27比268±16,P<0.01)。血管紧张素Ⅱ刺激细胞后明显上调CCR2mRNA表达,氯沙坦能显著抑制血管紧张素Ⅱ的作用,降低单核细胞趋化蛋白1的水平,减少单核内皮细胞间粘附,下调CCR2 mRNA表达。结论氯沙坦通过下调单核细胞趋化蛋白1受体CCR2基因表达抑制单核细胞活化。     

Effects of α1-adrenergic receptor on the proliferation of cholangiocarcinoma cells

Objective To investigate the correlation between α1-adrenergic receptor and the pathological behavior of cholangiocarcinoma, and the effects of norepinephrine (NE) on the proliferation of cholangiocarcinoma cell line QBC939. Methods Thirty-six samples of cholangiocarcinoma were resected in Southwest Hospital from August 2002 to March 2008. The expression of α1-adrenergic receptor in the 36 samples of cholangiocarcinoma tissue and 4 samples of normal bile duct tissue were detected by SABC technique. The proliferation of cholangio-carcinoma cell line QBC939 was detected after processing the cells with NE, phentolamine and prazosin. All the data were analyzed by chi-square test. Results The high positive expression rate of α1-adrenergic receptor was 68% (17/25) in patients with lymph node metastasis, which was significantly higher than 9% (1/11) in patients without lymph node metastasis (χ2=10.604, P<0.05). The high positive expression rate of α1-adrenergic receptor was 85% (11/13) in patients with middle and low positioned cholangiocarcinoma, which was significantly higher than 30% (7/23) in patients with hilar cholangiocarcinoma (χ2=9.753, P<0.05). NE promoted the proliferation of cholangiocarcinoma cell line QBC939 by stimulating the expression of α1-adrenergic receptor, and in a concentration-dependent manner. The proliferative effect was weakened as time passed by, and it was eliminated by phentolamine and prazosin. Conclusions The expression of α1-adrenergic receptor is diverse due to lymph node metastasis and the location of the tumor, α1-adrenergic receptor with high expression may play an important role in the proliferation and metastasis of cholangiocarcinoma.