真菌诱导子对胡桐悬浮培养细胞产生红厚壳素的影响

目的探讨真菌诱导子对胡桐悬浮培养细胞产生红厚壳素的影响。方法通过对胡桐叶斑病病菌的分离培养,制成真菌诱导子补加到胡桐细胞悬浮培养基中,考察不同浓度、不同加入时间对胡桐细胞生物量及红厚壳素产量的影响。结果S-I菌株诱导胡桐CR2细胞合成红厚壳素的最佳浓度为60 mg GE·L^-1,诱导子在细胞生长静止期初期(即培养d 18)加入对红厚壳素产量影响最大,可使产量提高27%,并促进了红厚壳素向胞外分泌。结论 壳多孢菌的添加能有效提高胡桐细胞悬浮培养体系中红厚壳素的产量。     

新疆雪莲细胞悬浮系的建立和黄酮类活性成分的产生

目的:建立新疆雪莲的悬浮培养体系。方法:研究不同培养基、培养基初始pH、碳源、接种量、植物生长物质含量对雪莲细胞生长和黄酮合成的影响。结果:N₆液体培养基在pH5.8、蔗糖含量50g·L^-1、接种量60-80g·L^-1FW时有利于细胞生长和黄酮合成,附加BA0.2mg·L^-1+NAA2mg·L^-1有利于黄酮合成,而附加BA0.5mg·L^-1+NAA3mg·L^-1则对生长有利。结论:培养条件的优化可有效提高雪莲悬浮细胞的生长和总黄酮的合成。     

全麻下改良额肌瓣悬吊术治疗儿童先天性重度上睑下垂临床观察

目的寻找一种治疗先天性重度上睑下垂的有效手术方法。方法总结94眼先天性重度上睑下垂行改良额肌瓣悬吊术。结果94眼中85眼满意(90%),94眼基本满意(100%)。结论该术式简单,效果好,是治疗先天性重度上睑下垂的首选方法。     

金丝桃提取物对应激动物模型的抗抑郁作用及其机理研究

[目的]探讨金丝桃提取物(EHP)的抗抑郁作用及其作用机制。[方法]选取了小鼠强迫游泳应激实验;小鼠尾悬吊应激实验;大鼠慢性应激抑郁模型脑内单胺类神经递质测定实验,研究EHP抗抑郁作用及其作用机制。[结果]EHP(320mg/kg、160mg/kg)能显著缩短强迫游泳小鼠及尾悬吊小鼠的不动时间(P<0.05);EHP(320mg/kg、160mg/kg)能显著提高慢性应激抑郁模型大鼠大脑内单胺类神经递质及其代谢物的含量(P<0.05).结论金丝桃提取物具有一定的抗抑郁作用,其抗抑郁作用可能与增加脑内单胺类神经递质的含量有关。     

Sedimentation and resuspendability evaluation of pharmaceutical suspensions by low-field one dimensional pulsed field gradient NMR profilometry

In order to study the sedimentation of pharmaceutical suspensions using low-field one dimensional pulsed field gradient nuclear magnetic resonance (1D pfg NMR) profilometry, the accuracy of signal acquisition as well as the spatial resolution of a commercial spectrometer operating at 23.4?MHz was investigated. The use of a solid Teflon spacer revealed that the accuracy of signal acquisition was independent of spatial position (height). The standard deviation of distance determinations was less than 150 µm, whereas the accuracy of water content determination was within 2% in the central part of the detection zone and deteriorated to 4% in the outer parts. The study of aqueous paramagnetic MnCl₂ solutions indicated an exponential relationship between the relative signal intensity and the transverse relaxation decay constant. From this relationship, the relative water content of suspensions could be derived from their signal intensity relative to that of water. Using concentrated paliperidone palmitate dispersions as model suspensions, low-field 1D pfg NMR profilometry has been proven to be suitable for the evaluation of both the sedimentation and resuspendability behavior of viscous, opaque suspensions, for which visual detection of homogeneity may be difficult.     

Development of a predictive in vitro dissolution for clarithromycin granular suspension based on in vitro-in vivo correlations

The objective of this study was to evaluate the in vitro behavior of different clarithromycin granular suspensions based on a developed in vitro-in vivo correlation model, using one reference and two test formulations. In vitro release rate data were obtained for each product using the USP apparatus II, operated at 50?rpm under different pH conditions. The dissolution efficiency was used to analyze the dissolution data. In vivo study was performed on six healthy male volunteers under fasting condition. Correlation was made between in vitro release and in vivo absorption. A linear model was developed using percent absorbed data versus percent dissolved data from the three products. Dissolution condition of 0.1N HCl for 1?h and then phosphate buffer at pH 6.8 was found to be the most discriminating dissolution method. Rate of absorption for the reference as estimated by Wagner-Nelson deconvolution was correlated with in vitro release with a correlation coefficient of 0.99. The in vivo results for the two test products were compared to the predicted values using the reference model with a correlation coefficient of 0.94. Furthermore, multiple level C correlations were obtained for some pharmacokinetic parameters with the corresponding in vitro kinetic parameters with correlation coefficients exceeding 0.90. Moreover, the interpretation of the in vitro and in vivo data with reference to formulations was discussed.     

Observation of the morphology and calcium content of vestibular otoconia in rats after simulated weightlessness

Conclusions

Reduction in bone formation may have been the main reason for the lower calcium content of the otoconia after simulated weightlessness in rats. The head-ward distribution of blood volume may explain the morphological changes observed in the middle and inner ears.

Objective

To observe morphological changes in the vestibular organs and measure the calcium content of otoconia in rats after simulated weightlessness.

Material and methods

We used a tail suspension model of simulated weightlessness and then investigated changes in the vestibular organs using scanning electron microscopy and X-ray microanalysis.

Results

In comparison to untreated rats, the vestibular otoconia of the rats subjected to simulated weightlessness were small, irregularly shaped or fissured, and were arranged loosely and out of order. In addition, the calcium content of the otoconia was markedly decreased.     

悬吊运动训练系统对不随意运动型脑瘫的康复效果分析

目的 分析悬吊运动训练系统对不随意运动型脑瘫的康复效果,为临床治疗提供科学依据。方法 选取2015年8月-2017年8月荆州市妇幼保健院收治的42例不随意运动型脑瘫患儿为研究对象,采用数字随机法均分为观察组与对照组,各21例,对照组患儿接受常规康复治疗,观察组患儿在常规康复治疗基础上运用悬吊运动训练系统,连续康复治疗3个月。采用Berg平衡量表(BBS)、粗大运动功能评分(GMFM)评价两组患儿平衡及粗大运动功能,记录步长、步宽以及10 m最大步行速度(MWS)评价步行能力,并比较不同年龄、粗大运动功能分级系统(GMFCS)分级对步行能力的影响。结果 两组患儿治疗前GMFM 评分、BBS评分差异无统计学意义(P>0.05),治疗后均显著增加,且治疗后观察组均显著高于对照组,差异有统计学意义(t=4.767、3.543,P＜0.01);两组治疗前步行能力相关评分差异无统计学意义(P>0.05),治疗后步宽显著降低,步长、MWS显著增加,且治疗后观察组步长、MWS显著高于对照组,步宽显著低于对照组(t=4.767、3.985、4.221,P＜0.001);治疗后不同年龄及GMFCS分级患儿步宽、步长、MWS比较,差异具有统计学意义(年龄:t=3.986、2.878、2.986,P＜0.001;GMFCS分级:t=4.043、4.173、3.875,P＜0.001)。结论 在常规康复治疗的基础上加用悬吊运动训练系统能提升不随意运动型脑瘫患儿粗大运动及平衡能力,降低步行宽度,提升步速及步长,也能显著提升其康复效果,同时患儿年龄及GMFCS分级影响治疗效果。