Dendronpholides A-R, cembranoid diterpenes from the chinese soft coral Dendronephthya sp

A systematic examination of the Chinese soft coral Dendronephthya sp. resulted in the isolation and characterization of 18 new cembranoid diterpenes, namely, dendronpholides A-R (2-19), along with 11-episinulariolide and an enantiomer of sandensolide. Their structures were determined through extensive spectroscopic (IR, MS, 2D NMR) data analyses and by comparison with those reported in literature. The cytotoxicity of several compounds against human tumor cell lines was also evaluated.     

Parasitic loranthus from Loranthaceae rather than Viscaceae potently inhibits fatty acid synthase and reduces body weight in mice

AIM OF THE STUDY: Our previous results have shown one species of parasitic loranthus (Taxillus chinensis (DC.) Dancer) exhibits potent inhibition on fatty acid synthase (FAS) that is proposed to be a potential therapeutic target for treatment of obesity. However, the medicinal parasitic loranthus come from tens of plants of two families, the Loranthaceae and the Viscaceae. This study was carried out to figure out whether these parasitic loranthus from the two families have similar inhibitory ability on FAS, and whether the parasitic loranthus with potent inhibitory ability on FAS significantly reduce body weight of animal. MATERIALS AND METHODS: CD-1 mice were used to test the effects of samples on their body weight and food intake in 20 days. The reversible and irreversible inhibition on FAS was assayed to study the inhibitory ability of sixteen different medicinal plants from these two families, which were collected in nature. RESULTS: The reversible inhibitory ability of the extracts from the Loranthaceae was nearly 400-fold stronger than that from the Viscaceae. The species from the genus Taxillus Tieghem showed the best effect on FAS in both reversible and irreversible inhibition. Moreover, the difference in host plants did not affect markedly on the inhibitory ability of parasitic loranthus. The medicinal herb with high inhibitory ability on FAS significantly reduced the body weight and food intake of mice by oral administration. CONCLUSIONS: The medicinal herbs from the family Loranthaceae, rather than those from the family Viscaceae, should be suitable to apply as botanical sources of parasitic loranthus for weight control. The herbs from genus Taxillus Tieghem are the best.     

冻融后移植的小鼠卵巢组织对促性腺激素的反应

目的 探讨冻融后移植的小鼠卵巢组织对促性腺激素的反应.方法 将36只性成熟雌性小白鼠随机分为新鲜移植组、冻融移植组和对照组,每组12只.新鲜移植组小鼠切除双侧卵巢,将卵巢切成小组织块,立即移植人双侧肾被膜下;冻融移植组小鼠切除双侧卵巢,将卵巢切成小组织块,采用玻璃化冷冻方法冷冻保存,2周后将冷冻卵巢组织复苏,移植入小鼠双侧肾被膜下.卵巢组织移植2周后,新鲜移植组和冻融移植组每组随机取6只小鼠应用7.5 IU人绝经期促性腺激素及10 IU绒毛膜促性腺激素,观察移植后的卵巢组织对促性腺激素的反应.同时应用免疫组化染色方法观察各组卵泡中卵泡刺激素受体的表达情况.结果 新鲜移植组、冻融移植组和对照组未应用促性腺激素小鼠卵巢组织内近成熟卵泡百分率分别为2.3%、2.3%和2.6%,应用促性腺激素小鼠卵巢组织内近成熟卵泡百分率分别为4.2%、4.0%和5.8%,各组内分别比较,差异均有统计学意义(P＜0.05);新鲜移植组和冻融移植组与对照组比较,差异均元统计学意义(P＞0.05).新鲜移植组、冻融移植组和对照组卵泡刺激素受体表达积分吸光度值在窦状卵泡中分别为9408±2777、9175±3093和8838±2064,在窦前卵泡中分别为4531±1903、4808±1386和5516±1136,各组间分别比较,差异均无统计学意义(P＞0.05).结论 卵巢组织冷冻保存、复苏及移植过程未影响卵巢卵泡刺激素受体的表达,冻融后移植的小鼠卵巢组织对外源性促性腺激素的反应未受冷冻、复苏及移植等过程影响.     

经尿道射精管切开术治疗射精管梗阻的效果(附60例报告)

目的：探讨经尿道射精管切开术（transurethral resection of ejaculatory duct, TURED）治疗射精管梗阻（ejaculatory duct obstruction, EDO）的效果。方法：2004年10月至2010年10月期间收治60例EDO患者,常规采用精液分析、精浆果糖和经直肠超声检查对其进行诊断,必要时行输精管造影检查。60例EDO患者均行TURED治疗,术后随访其疗效。结果：60例EDO患者的精液量为0.2~3.5 mL,平均(1.10±0.76) mL,pH值5.8~7.6,平均6.5±1.4;精浆果糖为一次射精0~51.4 μmol,平均为(5.86±2.19) μmol。经直肠超声检查结果为：单纯射精管扩张者15例,前列腺囊肿6例,单纯双侧精囊扩张10例,单侧精囊扩张4例,精囊扩张并射精管扩张10例,精囊扩张合并前列腺囊肿5例,单侧精囊扩张并对侧精囊发育不良或缺乏2例,精囊扩张并射精管扩张和钙化3例,单侧精囊扩张并射精管扩张和对侧精囊发育不良或缺乏5例。所有患者均完成手术,术后随访6~78个月。60例EDO患者行TURED术后,51例(85.0%)精液检查有不同程度的改善,16例(26.7%)妻子妊娠。结论：TURED是治疗EDO的一种简单、微创和有效的方法。     

48例皮肤癌创面闭合临床分析

对４８例皮肤癌病灶切除不能直接缝合的创面,选择较大创缘潜行分离拉拢缝合、植皮、皮瓣等三种方式闭合创面,均取得创面愈合,且无明显并发症发生。提示拉拢缝合是一种较好的方式;对老年头皮创面,首选植皮;深部组织裸露,用皮瓣覆盖;邻近下腹部的创面选用轴型皮瓣闭合。     

P38信号通路与糖尿病特有因素关系的探讨

目的：探讨P38信号通路(P38MAPK)在糖尿病大血管并发症中的作用。方法：分别以糖尿病特有因素：高葡萄糖、糖基化终产物(AGEs)、高胰岛素和过氧化氢刺激人脐静脉内皮细胞(HUVECs)，观察HUVECs P38MAPK磷酸化蛋白表达。结果：高葡萄糖、AGES、高胰岛素和过氧化氢均可做为独立因素激活P38MAPK，使其磷酸化表达量增加。结论：高葡萄糖、AGES生成增多、高胰岛素和氧化应激是糖尿病患者合并大血管并发症的易患因素；P38MAPK可能在糖尿病大血管并发症的发生、发展中起关键作用。     

赴泰国旅客旅行健康知识及行为调查分析

目的了解石家庄机场赴泰国旅客对当地高发传染病的认知现状和个人防护能力情况,为制定高风险航线往来旅客的风险分析方案提供依据。方法采取随机抽样方法,对由石家庄机场赴泰国游的旅客在知情同意的情况下进行面对面的问卷调查,所有资料录入Excel后采用SPSS 13.0软件进行统计分析。结果回收的503份有效调查问卷中,本科学历、收入中等偏上、第一次出境旅游的中青年人群为主体,具有目前出境游人群的代表性;有效问卷中,65.8%的人选择通过旅行社了解赴泰国旅行注意事项;大多数旅客集中选择泰国是"登革热"(42.5%)和"疟疾"(25.2%)的流行区域,而选择"痢疾"和"霍乱"的只占14.1%和11.9%;58.1%的旅客出境前未接种过任何疫苗;23.7%旅客不知道应该到哪里进行旅行前的健康咨询,13.1%不清楚归国后如有发热、皮疹等传染病症状该如何就医。结论评价口岸传染病防控能力现状,逐步构建主动型卫生检疫查验系统;完善风险评估机制,有针对性地对重点航班和人群采取多举措宣教以提升防病意识;应多部门联合持续加强出入境人员的传染病宣教、监测和防控工作。     

Molecular Dynamics Simulation Study on the Interactions of Mixed Cationic/Anionic Collectors on Muscovite (001) Surface in Aqueous Solution

In this study, the adsorption mechanisms of dodecylamine hydrochloride(DDAHC), sodium dodecyl sulfate (SDS), sodium dodecyl benzene sulfonate(SDBS), and their mixed anionic/cationic collectors at ten different molar ratios on a muscovite (Mcv) surface in neutral aqueous solution were assessed by molecular dynamics simulations (MDS). According to the snapshot, interaction energy, radial distribution function (RDF), and density profile between the Mcv surface and collector molecules, the individual DDAHC collector was an effective collector for the flotation of Mcv. The molar ratio of anionic/cationic collectors was determined to be an essential factor in the flotation recovery of Mcv. The DDAHC collector was involved in the adsorption of the mixed anionic/cationic collectors on the Mcv (001) surface, whereas SDS and SDBS collectors were co-adsorbed with DDAHC. The mixed cationic/anionic collector showed the best adsorption on the Mcv surface in a molar ratio of 2. Additionally, SDBS, which has one more benzene ring than SDS, was more likely to form spherical micelles with DDAHC, thus resulting in better adsorption on the Mcv surface. The results of micro-flotation experiments indicated that the DDAHC collector could improve the flotation recovery of Mcv in neutral aqueous solution, which was in agreement with MDS-derived findings. In conclusion, DDAHC alone is the optimum collector for Mcv flotation under the neutral aqueous conditions, while the mixture of DDAHC and SDBS collectors (molar ratio = 2:1) exhibits the similar flotation performance.