基于“药辅合一”理念的Pickering乳技术提升儿科用药羚珠散中石菖蒲挥发油热稳定性的研究

目的 在“药辅合一”理念下导入Pickering乳技术,提升儿科用药羚珠散中石菖蒲挥发油的稳定性。方法 对羚珠散各饮片粉末进行初步表征,确定稳定剂。通过成乳量、包油量和乳剂形态筛选出最佳稳定剂质量浓度、油水比和制备方法。并使用近红外光谱（nearinfraredspectroscopy,NIRS）分析石菖蒲油在Pickering乳中的包裹状态。比较不同时间下各组别挥发油的保有量、丙二醛和过氧化物的含量。再通过GC-MS分析其中成分的变化趋势。结果 筛选出珍珠粉作为Pickering乳的稳定剂,珍珠粉质量浓度为65 mg/mL,油水比9∶11为最优成乳条件,高压均质法为最优的制备方法,NIRS分析可知石菖蒲挥发油被珍珠粉包裹,Pickering乳液中没有形成新的化学键。对比各组在不同时间段下石菖蒲油的保有率和其中丙二醛和过氧化物含量,可知40℃放置1、3、8 h的Pickering乳剂相比于石菖蒲挥发油组有更高的保有率和更低的氧化程度。GC-MS分析结果表明,相比于石菖蒲挥发油组,Pickering乳组挥发性成分的稳定性显著提高。结论 在“药辅合一”理念下Pickering乳可用于含油固...     

狐臭柴中精油GC-MS测定及其抑制肺癌细胞增殖的研究

目的 研究狐臭柴Premna puberula叶片精油的化学成分、含量、抗氧化、抑菌及抗肿瘤的能力,为狐臭柴开发利用提供一定的研究基础。方法 采用气相色谱-质谱（gas chromatography-mass spectrometry,GC-MS）联用仪鉴定狐臭柴叶片精油的化学成分;以对1,1-二苯基-2-三硝基苯肼（DPPH）和2,2′-联氮双(3-乙基苯并噻唑啉-6-磺酸)二铵盐（ABTS）自由基的清除能力,结合总还原力为指标评价精油的抗氧化活性;以抑菌圈法探究其对大肠杆菌、金黄色葡萄球菌、铜绿假单胞杆菌、白色念珠菌的抑制作用;采用细胞增殖/毒性检测试剂盒法（Cell Counting Kit-8,CCK-8）测定其对人肺癌A549细胞的抑制作用。结果 狐臭柴叶片精油中共鉴定出72种化合物,约占精油总成分的99.36%,其主要成分为左旋-β-蒎烯（15.27%）、1-辛烯-3-醇（14.46%）、蒎烯（14.29%）、1-石竹烯（6.26%）、α-石竹烯（4.47%）和芳樟醇（3.12%）。抗氧化实验结果表明,狐臭柴叶片精油具有较强的总还原力,且对DPPH及ABTS自由基的半数抑制...     

Construction and evaluation of an alcohol vapor chamber system

An increasing number of studies demonstrated that alcohol vapor chamber is an effective way to model physical signs of alcohol use disorders. Although researchers are developing different vapor chambers to study chronic alcohol exposure model worldwide, few studies build and modify their own vapor chambers in China. Here, we designed and established an alcohol vapor chamber system for small animals. We described a paradigm showing how to control and monitor alcohol concentration in whole system. The vapor chamber system with several advantages including accommodating up to ten standard mouse cages. Furthermore, the system was tested by evaluating the blood alcohol concentration and neuron injury in mice. Importantly, the alcohol withdrawal after vapor exposure caused motor coordination impairment, anxiolytic- and depression-like behavior. Finally, the N-methyl-D-aspartate receptor (NMDAR)-mediated glutamatergic transmissions in the medial prefrontal cortex was changed after alcohol vapor exposure-induced behaviors. The frequency and amplitude of spontaneous excitatory postsynaptic currents between control and alcohol groups were not different, suggesting that alcohol exposure-induced behaviors are associated with the change in NMDAR response. Taken together, the new alcohol vapor chamber system was constructed, which would help to research the relationship between the stable alcohol exposure and withdrawal behaviors and to study chronic alcohol exposure-induced disorders in China.     

牛至挥发油对小鼠腹腔巨噬细胞活性及免疫器官重量的影响

一定浓度的牛至挥发油(OVLVO)能显著提高Balb/c小鼠腹腔巨噬细胞(Mφ)形成EA和YC花环的能力,显著增强腹腔Mφ的吞噬作用,有明显的增加小鼠脾脏重量的作用,而对胸腺的重量则无显著的影响。表明OVLVO在一定浓度下不引起免疫器官萎缩并能显著提高小鼠腹腔Mφ的活性。提示OVLVO的抗感染作用与增强Mφ的功能有关。     

Capsaicin-like activity of some natural pungent substances on peripheral endings of visceral primary afferents

Summary 1. The effects of some naturally occurring pungent substances, piperine, mustard oil, eugenol and curcumin, were compared to those of capsaicin in the rat isolated urinary bladder. 2. All test compounds dose-dependently contracted the rat bladder and produced desensitization toward capsaicin (1 mol/l). Development of cross-tachyphylaxis among the natural pungent substances on one hand and capsaicin on the other, suggested a common site of action on visceral primary afferents. 3. Contractile responses to piperine, mustard oil and eugenol were partially tetrodotoxin and ruthenium red-sensitive, suggesting that activation of sensory terminals by these agents takes place indirectly, as well as by a direct action on sensory receptors. 4. The presence of the secondary acylamide linkage (present in the backbone of capsaicin, but not in that of test compounds) does not appear to be essential to produce desensitization of sensory nerve terminals. Send offprint requests to R. Patacchini at the above address     

梅笠草提取物的抗炎及镇痛作用

[目的 ]探讨梅笠草提取物的抗炎及镇痛作用 .[方法 ]采用巴豆油所致小鼠耳壳肿胀的方法 ,测定耳片的肿胀度 ;用冰醋酸所致小鼠的扭体次数 ,测定小鼠的扭体反应次数 .[结果 ]梅笠草对巴豆油所致小鼠耳壳肿胀有抑制作用 ,与对照组相比有显著性差异 ;同时能减少冰醋酸所致小鼠的扭体次数 ,与对照组相比有显著性差异 .[结论 ]梅笠草提取物具有一定的抗急性炎症和抗镇痛作用     

当归油对大鼠离体子宫平滑肌收缩功能的影响

当归油（含藁本内酯ｌｉｇｕｓｔｉｌｉｄｅ〉７０％）,ｅｔ １％吐温－８０助溶,无论对正常未孕离体子宫还是对经缩宫素处理的离体子宫,者可剂量依赖性（浴槽终浓度为１ｍｇ／１００ｍＬ～３２ｍｇ／１００ｍＬ）地抑制子宫平滑肌的收缩功能,其性质与妇痛宁滴丸相似,但作用稍强,表明其有抗子宫平滑肌痉挛作用。     

烹调油烟致肺组织P^53基因异常表达的实验研究

目的　检测吸入烹调油烟 (COF)的大鼠肺组织中P53 蛋白含量 ,以测试烹调油烟的毒性作用。方法　亚急性吸入浓度为 (43± 4 )mg m3 的烹调油烟作实验组 ,吸入加热空气 (2 4～ 2 8℃ )为阴性对照组 ,B(a)P气注法染毒 [12mg (kg·次 ) ,5天 1次 ]动物作阳性组。常规病理组织取材、切片 ,免疫组化法 (S -P试剂盒 )检测P53 蛋白水平。结果　阴性对照组P53 蛋白表达阴性 ;COF组有P53 蛋白表达 ,染毒时间越长 ,P53 蛋白阳性数越多 ,以细胞增生、异型增生病变组织中P53 表达阳性数为多 ;B(a)P组有P53 蛋白表达 ,但看不出时相规律。结论　烹调油烟致P53 蛋白表达增高     

烹调油烟冷凝物遗传毒性实验研究

目的研究胡麻油烟冷凝物对小鼠致突变作用。方法采用不同剂量胡麻油烟冷凝物灌胃染毒小鼠,通过微核实验和精子畸形分析,观察微核率和精子畸形率变化。结果各染毒组微核率和精子畸形率均明显高于阴性对照组和胡麻油对照组(P＜0.01),并呈现剂量反应关系(P＜0.05)。结论在上述两实验系统中,胡麻油烟冷凝物具有明显的致突变作用。