Practical synthesis of bredemolic acid, a natural inhibitor of glycogen phosphorylase

Bredemolic acid (3) is a naturally occurring 2β,3α-isomer of maslinic acid (1) that is an allosteric site inhibitor of glycogen phosphorylase (GP). A practical synthesis of 3 was accomplished (18% yield) in five steps starting from the readily available 2β,3β-diol 6a. In a similar fashion, 2β,3α-dihydroxyurs-12-en-28-oic acid (4) was synthesized as a natural 2β,3α-isomer of corosolic acid (2). Compounds 3 and 4 exhibited significant inhibitory activity against rabbit muscle GPa with IC(50) values of 6.25 and 1.1 μM, respectively.     

人β防御素-1及Toll样受体基因多态性与慢性宫颈炎的相关性研究

目的 探讨β防御素-1(β-defensin-1,HBD-1)和Toll样受体基因多态性与慢性宫颈炎关系.方法 选取四川大学华西第二医院慢性宫颈炎患者150例作为病例组,100例健康个体作为对照组,提取宫颈上皮细胞DNA,聚合酶链反应-限制性内切酶片断长度多态性(PCR-RFLP)法检测单核苷酸多态性(single nucleotide polymorphism,SNP).结果 慢性宫颈炎组HBD-1外显子-44C/G的CG基因型及G等位基因频率均高于对照组(P＜0.05);HBD-外显子-52G/A、-20G/A的基因型和等位基因频率两组比较差异无统计学意义(P＞0.05);TLR2 Arg753Gln基因多态性在慢性宫颈炎组和对照组的表达差异无统计学意义(P＞ 0.05);TLR4 Asp299Gly、TLR4 Thr399Ile在研究人群中没有发现多态性表达.结论 HBD-1-44C/G位点可能是中国汉族人群慢性宫颈炎的易感位点,携带C/G基因型、等位基因G过多分布的女性可能是慢性宫颈炎的易感人群,HBD-1-52 G/A、HBD-1-20G/A、TLR2 Arg753 Gln、TLR4 Asp299Gly、TLR4 Thr399Ile基因多态性与慢性宫颈炎无相关性.     

Function and Significance of Very Low Density Lipoprotein Receptor Subtype Ⅱ

To explore the functions of very low density lipoprotein receptor (VLDL-R) subtype Ⅱ in lipoprotein metabolism and foam cells formation, the recombinant plasmid with the two subtypes cDNA was constructed respectively, the ldl A7 cell lines were transfected and two cell lines expressing VLDL-R were obtained: one stably expressing the VLDLR with the O-linked sugar region (type Ⅰ VLDLR) and the other without the O-linked sugar region (type Ⅱ VLDLR). In the study on binding of VLDLR to their nuclein labeled natural ligands (VLDL and β-VLDL), it was found that surface binding of^125I-VLDL or ^125I-β-VLDL of ldl-A7 cells transfected with type Ⅰ VLDLR recombinant (ldl-A7-VRI) was more higher than that of ldl-A7 cells transfected with type Ⅱ VLDLR recombinant (ldl-A7 VRⅡ). After being incubated with VLDL for different time, the contents of triglyceride and total cholesterol in cells were mensurated, and the formation of foam cells and accumulation of lipid in cells was observed by oil-red O staining. The results showed that the contents of triglyceride and total cholesterol in IdI-A7-VR Ⅰ were much higher than those in ldl-A7-VR Ⅱ, and IdI-A7-VR Ⅰ could transform into foam cells notably. It was suggested that type Ⅰ VLDLR binds with relative higher affinity to VLDL and β-VLDL, and internalizes much more lipoprotein into cells. As a result, we can conclude that type Ⅰ VLDLR plays a more important role in lipoprotein metabolism and foam cells formation than type Ⅱ VLDLR。     

肝内Glisson系统内部结构的观察

肝内Glisson系统由肝内门静脉、肝内肝动脉和肝内肝管组成。观察和测量了其第一级分支,在显微镜下观察了其第二级分支和第三级分支,研究结果为临床应用提供解剖学资料。     

输卵管妊娠与人巨细胞病毒、弓形虫感染的相关性研究

目的　研究人巨细胞病毒、弓形虫感染与输卵管妊娠的相关性。方法　采用酶联免疫吸附测定 (ELISA)方法和聚合酶链反应 (PCR)技术检测输卵管妊娠患者与对照组血清人巨细胞病毒 (HCMV)和弓形虫 (TOXO)抗体以及生殖道HCMV和TOXODNA。结果　病例组血清HCMVIgG抗体阳性检出率为 31 9% ,明显高于对照组15 8% (P <0 0 5 ) ;HCMVIgM抗体、TOXOIgG、IgM抗体检出率均高于对照组 ,在统计学上无明显差异 (P >0 0 5 ) ;病例组宫颈、宫腔及输卵管组织中均分离到HCMVDNA和TOXODNA ,且宫颈HCMVDNA阳性检出率为14 3% ,明显高于对照组 (P <0 0 5 )。结论　输卵管妊娠与HCMV感染有关 ,TOXO感染为输卵管妊娠的可疑因素。     

CY消毒湿面巾消毒效果的实验研究

以LJ-强化戊二醛为主体制成的CY消毒液。能快速杀灭细菌,10min内可灭活HBsAg,在有效浓度范围内不会对人体产生危害,应用安全可靠。以其制成湿面巾擦拭手、碗、筷2min,可将实验菌及自然菌减少99％,其细菌残留数均<30个/cm~2。拭后纸上无细菌残留,其丢弃物不会污染环境。室温下(35～39℃)放置3个月的CY湿面巾,外观无改变,消毒效果稳定。     

26例抗着丝点抗体阳性分析

目的:提高临床对抗着丝点抗体的认识.方法:回顾分析了26例抗着丝点抗体阳性患者临床资料.结果:26例抗着丝点抗体阳性患者中系统性硬化症10例(38.4%),系统性红斑狼疮4例(15.4%),干燥综合症和类风湿关节炎分别3例(11.5%),混合结缔组织病、仅有雷诺现象各2例(7.7%),CREST综合征和不明原因肝脏疾病各1例(3.8%).着丝点抗体可同时出现其它自身抗体.结论:抗着丝点抗体可出现在多种疾病中,着丝点抗体并非CREST综合征的特异性抗体,抗着丝点抗体阳性患者最多见临床症状为雷诺现象(53.8%),其次为皮肤硬化(34.6%).     

民族医学院护理学专业女大学生的身体成分节段性分布特点

目的了解护理学专业女大学生的体质健康情况,为学校有关部门对护理学专业女大学生的健康干预以及学生的形体美锻炼提供科学依据。方法利用MC-180身体成分测试仪检测395名右江民族医学院护理专业大学生的身体成分,对身体质量指数以及全身、躯干和四肢的肌肉量和脂肪量进行分析。结果护理学专业女大学生体重过轻人数占总人数的30.13%,肥胖和超重人数占5.31%,四肢肌肉量在21岁达高峰,而脂肪量则在22岁达高峰。肌肉量右上肢明显高于左上肢,脂肪量则左上肢高于右上肢。结论护理学专业女大学生体重过轻人数偏高,上肢的肌肉量和脂肪量分布不均衡,有关部门应对护理学专业女大学生的体质健康进行干预,有针对性指导女大学生调节饮食结构和进行体育锻炼,让她们获得体质健康和形体美。     

HMG-CoA还原酶抑制剂对X综合征血管内皮功能的影响

目的 :通过应用HMG -CoA还原酶抑制剂 (普伐他汀 )对x综合浆内征患者的血管内皮功能的影响 ,观察微血管病变引起的心肌缺血的改善作用。方法 :严格筛选 17例临床表现为胸痛并已作冠脉造影正常的患者服用普伐他汀 10mg。每晚睡前服 1次 ,疗程 3个月 ,用药前后进行血浆内皮素 (ET)的检测及活动平板运动试验 ,比较用药前后各项指标的变化情况。结果 :血浆ET水平较治疗前明显降低 (P <0 .0 1) ,运动出现心绞痛ST段改变的时间明显延长 (P <0 .0 5 ) ;ST段恢复时间显著缩短 (P <0 .0 5 )运动后 4分时相各导联运动诱发的ST段缺血型下降之和 (∑ST)明显减少。结论 :HMG -CoA还原酶抑制剂 (普伐他汀 )可显著改善X综合征患者的血管内皮功能异常 ,减轻心肌缺血 ,对X综合征有治疗作用     

Effect of Qingre Quyu Granule (清热祛瘀颗粒) on stabilizing plaques in the brachiocephalic artery of apolipoprotein E deficient mice

Objective： To investigate the effect of Qingre Quyu Granule （清热祛瘀颗粒, QRQYG） on stabilizing vulnerable plaques in apolipoprotein E （ApoE） defficient mice. Methods： Seventy-two male ApoE defficient mice were given a high-fat diet from 6 weeks of age. At the 16th week, all the mice were randomized into 3 groups： the QRQYG group, the simvastatin group, and the control group. Sixteen weeks after administration of 0.9 g/kg QRQYG, 3 mg/kg simvastatin or 10 mg/kg sodium chloride per day to the respective groups, the animals were euthanized. The pathological morphologic changes in the vulnerable plaques were evaluated, the matrix metalloprotease-9 （MMP-9） expression was measured by immunohistofluorescence, the soluble intercellular adhesion molecule 1 （ICAM-1） was determined by ELISA, the nuclear factor kappaB （NF-κB） subunit p65 was measured by quantitative RT-PCR, and, finally, thrombospondin-1 （TSP-1） was determined by the immunohistochemical method. Results： The plaque cross-sectional area in the brachiocephalic artery （23.7%, P0.01）, the lipid core of the plaque （43.1%±3.1%）, and the number of buried ？brotic caps of the plaque were significantly decreased in the QRQYG group compared to the control group （both P0.01）; furthermore, the thickness of the ？brotic cap of the plaque increased and the intra-plaque hemorrhage of the plaque decreased. The serum soluble ICAM-1 （27.1±5.1 μg/mL）, the protein expression of MMP-9 and TSP-1 and the p65 mRNA expression increased in the QRQYG group in comparison with the control group （P0.05 or P0.01）. Conclusion： QRQYG could stabilize the vulnerable plaque through inhibition of the inflammatory response.