补肾药物穴位给药治疗骨质疏松症的机理探讨

骨质疏松症是临床常见病多发病。随着人口老龄化的进展,骨质疏松的患病率逐年增加。目前国内外主要应用药物(包括西药和中药)疗法,其研究开展的较早也较系统,已取得了较大的进展,药理学研究多局限于口服药物和注射药物的研究。近年来,伴随着透皮剂和离子导入等理化技术的发展,中药经皮给药治疗骨质疏松症已取得一定进展。就此方面对补肾药物经皮穴位给药治疗骨质疏松症的机理作一探讨。     

去卵巢对大鼠泪腺中IL-17A等炎症因子表达的影响

目的建立去卵巢大鼠模型,观察性激素水平改变对泪腺中IL-17A以及IL-1β、IL-6、TNF-α等炎症因子表达的影响。方法实验研究。健康雌性SD大鼠20只随机分为2组,实验组（10只）摘除大鼠双侧卵巢,对照组（10只）为未摘除卵巢的模拟手术组。术前及术后第1个月、第2个月、第3个月时2组均行泪液分泌试验（SIT）、角膜荧光染色检查进行眼表评估。于第3个月时放射免疫分析法分别检测2组大鼠血清雌二醇、睾酮含量,HE染色观察泪腺上皮细胞形态,免疫组化染色法、Western Blot法检测2组泪腺中IL-17A、IL-1β、IL-6、TNF-α的表达。2组性激素质量浓度比较、炎症因子A值表达比较均应用独立样本t检验。2组各时间点的SIT结果比较采用重复测量资料两因素方差分析。结果实验组大鼠去卵巢后第3个月时,体内雌二醇浓度低于对照组（t=-35.37,P<0.01）,睾酮浓度低于对照组（t=-12.13,P<0.01）。2组各时期SIT检查未见泪液分泌减少、均未见角膜荧光染色。HE染色见实验组泪腺腺泡萎缩,排列紊乱,胞质内酶原颗粒明显减少。泪腺IL-17A表达量2组比较实验组高于对照组（免疫组化法：t=7.56,P<0.01;Western Blot法：t=20.90,P<0.01）。余各因子表达量实验组也均高于对照组（免疫组化法：IL-1β：t=13.71,P<0.01;IL-6：t=13.92,P<0.01;TNF-α：t=6.11,P<0.01。Western Blot法：IL-1β：t=16.93,P<0.01;IL-6：t=12.46,P<0.01;TNF-α：t=14.47,P<0.01）。结论大鼠去卵巢3个月时性激素水平降低,未见明显眼表损害。但泪腺中炎症因子IL-17A、IL-1β、IL-6、TNF-α的表达增加。     

前列腺疾病患者血清TPSA、FPSA和PAP的检测及其意义

为探讨总前列腺特异性抗原 (TPSA)、游离前列腺特异性抗原 (FPSA)、前列腺酸性磷酸酶 (PAP)的检测对前列腺疾病的诊断价值 ,采用双抗体夹心酶联免疫 (ELISA)法对 3 8例前列腺癌、85例前列腺良性疾病和 40例正常人血清中 TPSA、FPSA和PAP水平进行了检测。结果显示 ,前列腺癌患者血清中 TPSA、 FPSA和 PAP水平均显著高于前列腺良性疾病组和正常对照组 (P<0 .0 1) ,F/ T比值前列腺癌组明显低于前列腺良性疾病组和正常组 (P<0 .0 1) ,前列腺良性疾病组与正常组无明显差别。     

Schiff碱型r-氨基丁酸酯类衍生物的合成及其抗惊厥活性

作者设计并合成了9个Schiff碱型取代对羟基本甲醛缩r-氨基丁酸酯类化合物。并用美国NIH提出的“抗癫痫药物开发程序(ADD)对所合成的化合物进行抗惊厥活性筛选。结果表明化合物Ⅲf、Ⅲg、Ⅲh、Ⅲi具有不同程度的抗惊厥活性。     

High-Temperature Tribological Behavior of HDPE Composites Reinforced by Short Carbon Fiber under Water-Lubricated Conditions

The polymer water-lubricated bearing is widely used in marine transmission systems, and the tribological properties can be improved by addition of inorganic nano-fillers. The aim of this study is to investigate the effect of SCFs and temperature on the water-lubricating properties of high-density polyethylene (HDPE) composites. HDPE composites reinforced by varying content of short carbon fibers (SCFs) were fabricated via twin-screw extrusion and injection molding techniques to study the hardness and surface wettability of those composites. The tribological properties under water-lubricated conditions were investigated through a pin-on-disk reciprocating tribometer under different temperatures. The results showed that the increase in hardness of HDPE composites reached maximum to 42.9% after adding 25 wt % SCFs. The contact angle also increased with the increase in SCFs content and reached a maximum of 95.2° as the amount of SCFs increased to 20 wt %. The incorporation of SCFs increased the wear resistance and lubricating property of HDPE composites at different temperatures. The HDPE composite containing 20 wt % SCFs showed the lowest friction coefficient of 0.076 at 40 °C, and the wear track depth reached a maximum of 36.3 mm at 60 °C. Based on the surface wetting property and wear analysis, potential effect mechanisms of fillers and temperature were discussed. The knowledge from this study is useful for designing the anti-wear water-lubricated polymer bearing.     

PdPbAg alloy NPs immobilized on reduced graphene oxide/In2O3 composites as highly active electrocatalysts for direct ethylene glycol fuel cells

rGO-modified indium oxide (In₂O₃) anchored PdPbAg nanoalloy composites (PdPbAg@rGO/In₂O₃) were prepared by a facile hydrothermal, annealing and reduction method. Electrochemical tests showed that the as-prepared trimetallic catalyst exhibited excellent electrocatalytic activity and high resistance to CO poisoning compared with commercial Pd/C, mono-Pd and different bimetallic catalysts. Specifically, PdPbAg@rGO/In₂O₃ has the highest forward peak current density of 213.89 mA cm⁻², which is 7.89 times that of Pd/C (27.07 mA cm⁻²). After 3600 s chronoamperometry (CA) test, the retained current density of PdPbAg@rGO/In₂O₃ reaches 78.15% of the initial value. Its excellent electrocatalytic oxidation performance is attributed to the support with large specific surface area and the strong synergistic effect of PdPbAg nanoalloys, which provide a large number of interfaces and achievable reactive sites. In addition, the introduction of rGO into the In₂O₃ matrix contributes to its excellent electron transfer and large specific surface area, which is beneficial to improving the catalytic ability of the catalyst. The study of this novel composite material provides a conceptual and applicable route for the development of advanced high electrochemical performance Pd-based electrocatalysts for direct ethylene glycol fuel cells.

rGO-modified indium oxide (In₂O₃) anchored PdPbAg nanoalloy composites (PdPbAg@rGO/In₂O₃) were prepared by a facile hydrothermal, annealing and reduction method.     

焦虑症和抑郁症患者的视觉和脑干听觉诱发电位观察

目的 研究脑诱发电位在焦虑症患者中的应用.方法 收集37例焦虑症组(AD)、32例抑郁症组(CD)及36名正常成人对照组(NC),应用Nicolet Bravo脑电生理仪以及光、声刺激,进行视觉诱发电位(VEPs)和脑干听觉诱发电位(BAEPs)检查.结果 AD组、CD组和NC组在潜伏期P 2(Fz脑区),波幅N 1(Cz脑区)上有差异显著性(P＜0.01).与NC相比,AD组潜伏期P 2前移(Fz脑区),波幅P 2下降(Cz脑区).与AD组比较,CD 组潜伏期延长.CD组潜伏期变化方向与AD组相反.结论 AD组和CD组改变与欧美报道相似.AD和CD诱发电位的特点,值得进一步随访观察.     

A Brain-Spleen Axis Regulates Humoral Immunity

A happy mood helps to build a flourishing immune system.Interactions between the nervous and immune systems have attracted the interest of researchers for decades.It is well known that external stressors can activate the hypothalamus to regulate immune responses via the hypothalamic-pituitary-adrenal cortex(HPA)axis[1].As well,inflammatory stimuli can activate a rapid antiinflammatory reflex via the cholinergic vagus nerve pathway.     

In vitro and in vivo characterization of erythrosin B and derivatives against Zika virus

Zika virus (ZIKV) causes significant human diseases without specific therapy. Previously we found erythrosin B, an FDA-approved food additive, inhibited viral NS2B−NS3 interactions, leading to inhibition of ZIKV infection in cell culture. In this study, we performed pharmacokinetic and in vivo studies to demonstrate the efficacy of erythrosin B against ZIKV in 3D mini-brain organoid and mouse models. Our results showed that erythrosin B is very effective in abolishing ZIKV replication in the 3D organoid model. Although pharmacokinetics studies indicated that erythrosin B had a low absorption profile, mice challenged by a lethal dose of ZIKV showed a significantly improved survival rate upon oral administration of erythrosin B, compared to vehicle control. Limited structure−activity relationship studies indicated that most analogs of erythrosin B with modifications on the xanthene ring led to loss or reduction of inhibitory activities towards viral NS2B−NS3 interactions, protease activity and antiviral efficacy. In contrast, introducing chlorine substitutions on the isobenzofuran ring led to slightly increased activities, suggesting that the isobenzofuran ring is well tolerated for modifications. Cytotoxicity studies indicated that all derivatives are nontoxic to human cells. Overall, our studies demonstrated erythrosin B is an effective antiviral against ZIKV both in vitro and in vivo.KEY WORDS: Flavivirus, Zika virus, Dengue virus, Antiviral, Protease inhibitor, Erythrosin B