高脂血症患者C—反应蛋白含量的变化及氟伐他汀对它的影响

OBJECTIVE: To observe the changes of C-reactive protein (CRP) level and its relationship with blood lipids, and the effects of fluvastatin on CRP and the lipids in patients with hyperlipidemia. METHODS: Serum levels of cholesterol (TC), triglycerides (TG), high density lipoprotein cholesterol (HDL-C), low-density lipoprotein cholesterol (LDL-C), very-low-density lipoprotein cholesterol (VLDL-C) and lipoprotein(a)[Lp(a)] were measured by enzyme assay, and plasma CRP level by immunonephelometry before and after fluvastatin treatment (20 mg/d for 4 weeks) in patients with hyperlipidemia. RESULTS: CRP levels were above normal in 90.3% hyperlipidemia cases in spite of the various accompanying diseases. Fluvastatin treatment significantly reduced TC (-7.49%), TG (-14.32%), LDL (-13.88%), VLDL (-18.48%) and TC/HDL(-13.50%) levels (P<0.01), and also brought down Lp(a) concentration (-13.81%). CRP levels was very effectively reduced after the treatment (-15.92%, P<0.001). No association between basal CRP levels and basal lipids and Lp(a) concentrations was observed. Positive correlation of CRP, however, was observed after fluvastatin treatment with TC/HDL (r=0.62, P=0.041) and Lp(a) (r=0.320, P=0.011), while inverse relations were noted between CRP and HDL (r=-0.288, P=0.023). CONCLUSION: CRP levels increases markedly in patients with hyperlipidemia, a fact that is independent of the accompanying diseases. In addition to modulating blood lipid levels, fluvastatin also reduces CRP level, the latter possibly serving as an independent predictive factor for atherosclerotic cardiovascular diseases and also as an indicator for estimating the effectiveness of the treatment.     

Hyperalgesia and neural excitability following injuries to central and peripheral branches of axons and somata of dorsal root ganglion neurons

We examined thermal hyperalgesia, excitability of dorsal root ganglion (DRG) neurons, and antinociceptive effects of N-methyl-d-aspartate (NMDA) receptor antagonists in rats with injury to different regions of DRG neurons. The central or peripheral branches of axons of DRG neurons were injured by partial dorsal rhizotomy (PDR) and chronic constriction injury of sciatic nerve (CCI), respectively, or the somata injured by chronic compression of DRG (CCD). Thermal hyperalgesia was evidenced by significantly shortened latencies of foot withdrawal to radiant heat stimulation of the plantar surface. Intracellular recordings were obtained in vitro from L(4) and/or L(5) ganglia. There are four principle findings: 1) PDR as well as CCD and CCI induced thermal hyperalgesia; 2) PDR produced significantly less severe and shorter duration hyperalgesia than CCD and CCI; 3) intrathecal administration of NMDA receptor antagonists d-2-amino-5-phosphonovaleric acid (APV) and dizocilpine maleate (MK-801) inhibited thermal hyperalgesia in PDR, CCD, and CCI rats. Pretreatment of APV and MK-801 delayed the emergence of hyperalgesia for 48-72 h, while posttreatment inhibited hyperalgesia for 24-36 h; and 4) CCD and CCI increased excitability of DRG neurons as judged by the significantly lowered threshold currents and action potential voltage thresholds and increased incidence of repetitive discharges. However, PDR did not alter the excitability of DRG neurons. These findings indicate that injury to the dorsal root, compared with injury to the peripheral nerve or DRG somata has different effects on the development of hyperalgesia. These contributions involve different changes in DRG membrane excitability, but each involves pathways (presumably in the spinal cord) that depend on NMDA receptors.     

姜黄素诱导人肺癌细胞凋亡的作用机制初步研究

目的　探讨姜黄素对人肺腺癌细胞 (SPC A1 )抗癌作用机制。方法　采用细胞培养、荧光显微镜、原位末端标记、放射免疫、原位杂交等技术 ,探讨姜黄素抗癌作用及其机制。结果　①姜黄素作用于癌细胞后 ,光镜下可见有细胞脱壁 ,悬浮培养液中 ;荧光镜下可见细胞核破碎 ,裂解成大小不等的凋亡小体 ,原位末端标记法进一步证实 2 0 μmol·L- 1 姜黄素作用 2 4h凋亡率达 42 67%。②姜黄素作用于癌细胞后 ,使细胞内cAMP浓度升高。③ 2 0 μmol·L- 1 姜黄素作用于癌细胞 2 4h后 ,使人肺癌细胞半胱氨酸蛋白酶 8(Caspase 8)mRNA表达明显增高。结论　姜黄素可诱导人肺癌细胞凋亡 ,其作用机制可能与细胞内cAMP浓度升高、Caspase 8表达增高有关     

上海郊区老年痴呆症病人α-雌激素受体及芳香烃受体基因多态性

目的：探索上海地区农民人群中α-雌激素受体基因(ER-α)及芳香烃受体基因(Ahr)不同基因形态和老年痴呆症高发风险的可能联系．方法：分别以PCR—RFLP和AS—PCR方法分析一组老年痴呆症患者(n=52)ER-α基因及Ahr基因的多态位点，同一地区的健康人群(n=125)为对照．结果：Alzheimer症病人ER-α基因两个位点突变形态频率显著高于对照人群(Pvu Ⅱ位点：P=0．023，OR=2．94，95％CI 1．13—7．71；Xba I位点：P=0．046，0R=2．28，95％ CI 1．003—5．17)．Ahr G1721A位点基因型频率在病人组和对照组间无显著差异．结论：ER-α基因多态性可能与Alzheimer症易感性个体差异有关，本工作不支持Ahr基因多态性与老年痴呆症高发风险间的可能关联．     

Influence of cyclic loading on the fracture toughness and load bearing capacities of all-ceramic crowns

The purpose of this study was to investigate how cyclic loading influenced the fracture toughness of hot-press lithium disilicate and zirconia core materials and whether there was an increase in the propensity for crown failure. Two types of all-ceramic crowns including the IPS e.max Press system （n=24） and the Lava zirconia system （n=24）, were selected. Sectioned specimens were subjected to cyclic loading with the maximum magnitude of 200 N （R=0.1） until two million cycles. The material properties including Young＇s modulus （E） and hardness （H） and the fracture toughness （K,c） of the core materials were evaluated using indentation methods （n= 12 each）. The load-bearing capacities of the specimens were examined by means of monotonic load to fracture （n=12 each）. It was found that the material properties, including E, Hand Knc, of the two types of dental ceramics, were reduced. Statistical analysis indicated that there were no significant influences of fatigue loading on material properties E and H for both types of dental ceramics or Kgc for zirconia, while for the IPS e.max Press core, K,c, which was parallel to the direction of the lithium disilicate crystals, was significantly reduced （P-0.001）. A conclusion was drawn that zirconia possesses high mechanical reliability and sustainable capacity to resist fatigue loading, while fatigue loading remarkably degraded the anisotropic mechanical behaviour of hot-press lithium disilicate ceramics.     

An efficient class of bis-NHC salts: applications in Pd-catalyzed reactions under mild reaction conditions

This study describes an efficient class of bis-N-heterocyclic carbene (bis-NHC) salts that can be easily made from commercially available and inexpensive starting materials. The application of these salts to Pd-catalyzed reactions is described. The palladium (Pd) catalyst generated in situ was highly effective under mild reaction conditions.

This study describes an efficient class of bis-N-heterocyclic carbene (bis-NHC) salts that can be easily made from commercially available and inexpensive starting materials.     

Increased Orexin Expression Promotes Sleep/Wake Disturbances in the SOD1-G93A Mouse Model of Amyotrophic Lateral Sclerosis

Background:Sleep/wake disturbances in patients with amyotrophic lateral sclerosis (ALS) are well-documented,however,no animal or mechanistic studies on these disturbances exist.Orexin is a crucial neur...     

高原地区重型颅脑损伤患者死亡因素分析

目的 分析高原地区的重型颅脑损伤患者的死亡率和死亡危险因素.方法 回顾性分析西藏军区总院2007年6月～2012年6月收治的367例高原地区重型颅脑损伤患者的病例资料,应用多因素logistic回归分析确定引起死亡的危险因素.结果 患者入院3个月的总死亡率为22％(80/367).患者受伤至入院时间(OR=1.805),入院时GCS评分(OR =1.991)、孔对光反射情况(OR =2.033)和头颅CT显示的中线移位程度(OR =1.717)为死亡的独立危险因素.患者性别、年龄和居住地海拔高度对于死亡率的影响未显示出统计学意义.结论 本研究分析了高原地区重型颅脑损伤死亡的危险因素.受伤至入院时间较长、入院GCS评分低、双侧瞳孔散大或CT显示中线移位＞10 mm的重型颅脑损伤患者死亡率高.这些发现有利于制定临床治疗方案,改善患者预后.     

胃十二指肠疾病儿童幽门螺杆菌cagA、vacA和iceA基因型分布

目的了解来自于江西地区胃十二指肠疾病儿童感染的幽门螺杆菌(H.pylori)临床分离菌株cag A、vac A和ice A基因亚型分布情况,并探讨H.pylori cag A、vac A和ice A基因亚型与儿童胃十二指肠疾病类型之间的关系。方法从来自江西地区的316例患有胃十二指肠疾病儿童的胃窦黏膜中,培养出107株H.pylori菌株,提取菌株基因组DNA,采用PCR法检测H.pylori ure A、cag A、vac A及ice A基因亚型。结果在107株H.pylori临床分离菌株中,H.pylori ure A基因和cag A基因检出率分别为100%(107/107)和94.4%(101/107)。vac A基因总检出率为100%(107/107),vac As1a、vac As1c、vac Am1和vac Am2基因检出率分别为74.8%(80/107)、25.2%(27/107)、29.9%(32/107)和69.2%(74/107),其中0.9%(1/107)H.pylori菌株同时检测出vac Am1和vac Am2基因型;在vac A基因的嵌合体中,vac As1a/m1、vac As1a/m2、vac As1c/m1和vac As1c/m2基因检出率分别为26.2%(28/107)、51.4%(55/107)、3.7%(4/107)和17.8%(19/107)(P0.001)。ice A1和ice A2基因阳性检出率分别为79.4%(85/107)和9.3%(10/107)(P0.001);ice A1和ice A2基因亚型均阳性的检出率为7.5%(8/107)。H.pylori各基因亚型在消化性溃疡、慢性胃炎和十二指肠球炎3组间的检出率比较差异无统计学意义(P0.05)。结论来自于江西地区胃十二指肠疾病儿童感染的H.pylori优势基因亚型是cag A、vac As1a/m2和ice A1;H.pylori感染存在不同基因型菌株混合感染;H.pylori基因亚型与胃十二指肠疾病类型无相关性。