制备流感疫苗的细胞基质研究进展

考虑到鸡胚生产流感疫苗的局限性,研究者们开始关注细胞培养疫苗生产技术.此文主要介绍了几种常用的细胞基质(如Vero、PER.C6、Madin-Darby狗肾细胞和其他动物细胞),阐述了利用细胞培养技术制备流感疫苗的方法及研究进展.相关研究显示细胞基质生产的流感疫苗与鸡胚生产的流感疫苗相比,效果相似或者更好.     

止血镇痛胶囊对子宫内膜增生症大鼠子宫的影响

目的研究止血镇痛胶囊对子宫内膜增生症大鼠的子宫内膜厚度和子宫组织形态学的影响。方法 SD雌性大鼠去势后,隔天肌肉注射0.1 mg/mL苯甲酸雌二醇1.5 mL/kg,连续14次,制备子宫内膜增生症模型,观察子宫内膜增生症大鼠ig止血镇痛胶囊131.3、262.5、525.0 mg/kg 7 d后对体质量、子宫系数、子宫内膜厚度及子宫组织形态学的变化影响。结果止血镇痛胶囊可减少大鼠子宫内膜厚度,减轻子宫组织的水肿程度,对子宫内膜上皮细胞、膜腺管周围组织变性和坏死、子宫内膜腺体减少、子宫肌层纤维组织增生均未有明显的影响。结论止血镇痛胶囊通过减轻子宫内膜增生症大鼠子宫内膜水肿程度,从而使子宫内膜厚度变薄,起到抑制子宫内膜增生的作用。     

脐血CD34+细胞向巨核系定向扩增的初步探讨

目的探讨不同细胞因子组合定向诱导CD34 细胞向巨核系分化的能力。方法利用免疫磁珠法(MACS)分离纯化脐血CD34 细胞,在无血清培养体系中以1×105/ml每孔接种,经不同细胞因子组合诱导培养。结果收集5份脐血标本,平均体积为95ml,CD34 细胞的比例为2.18%±0.89%,经过MACS分选后,CD34 细胞纯度平均可达81.55%。在细胞生长因子的刺激培养下,MK3组有核细胞数,CD34 细胞数,CD41a 细胞数在培养第16天分别达277.4倍、6.89倍、66.79倍,高于其它各组。结论脐血CD34 细胞体外在相关细胞生长因子的刺激下可向巨核细胞系定向分化。     

Mesoporous silica-coated gold nanostars with drug payload for combined chemo-photothermal cancer therapy

Abstract

Combined chemo-photothermal therapy is attracting increasing attention in the treatment of cancers. In this work, PEGylated mesoporous SiO₂-coated gold nanostars (GNS@mSiO₂-PEG) were synthesised without using the cytotoxic surfactant cetyltrimethylammonium bromide as the template. Mesoporous nanostructures were obtained by poly(vinylpyrrolidone) protection of the outer silica shell and NaOH etching of the inner shell. GNS@mSiO₂-PEG exhibited good dispersity in medium and excellent photothermal effects. Loading capacity for the anticancer drug doxorubicin (DOX) was ～17.9%, and the drug release profile was pH- and light-responsive. In vitro studies revealed that the as-prepared nanocomposites featured good biocompatibility. Furthermore, the nanocomposites were readily internalised by cancer cells, and a combined chemo-photothermal therapy assay revealed that DOX-loaded GNS@mSiO₂-PEG have a higher therapeutic efficiency than individual therapies, demonstrating suitable synergistic effects.     

Quantification of rhynchophylline in rabbit plasma by UPLC-MS/MS and its application in a pharmacokinetic study

It was recently revealed thatRhynchophylline (Rhy), an important constituent of Uncaria rhynchophylla, possessed antihypertensive and neuroprotective effects. However, no information about the pharmacokinetics of Rhy in a herbivorous speciessuch as rabbit is available. Allometric scaling is valuable in designing human pharmacokinetic parameters from preclinical species. To investigate the characteristics of Rhy in vivo, a rapid and sensitive ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) method was developed and validated for the measurement of Rhy concentrations in rabbit plasma. The method was linear over the concentration range of 0.01–10.24 µg/mL. Intra-day and inter-day precision and accuracy were less than 8.0%. The recoveries were in the range of 94.17%–103.32%. Matrix effects (ME) were minor. After oral administration of Rhy at 20, 40 and 80 mg/kg, the mean elimination half-life (t_1/2) for these doses were 1.19, 1.49 and 1.37 h in rabbits, respectively. There was a proportionate increase in the maximum concentration (C_max) and the area under the blood concentration-time curve (AUC_∞) for three doses. The developed method was suitable for the study on pharmacokinetics of Rhy after oral administration and it may provide a valuable basis for clinical application of such a bioactive compound of herbal medicines.     

补肾调经汤对多囊卵巢综合征模型大鼠血清瘦素、胰岛素和睾酮的影响

目的探讨补肾调经汤改善多囊卵巢综合征(PCOS)排卵状况的作用机制。方法选用80只雌性SD大鼠,建立PCOS大鼠模型,随机分为空白组、模型组、二甲双胍组、补肾调经汤高剂量组、低剂量组,每组10只,其余大鼠剔除。观察各组大鼠血清瘦素、胰岛素和睾酮激素的变化。结果补肾调经汤高剂量组、低剂量组均可以使PCOS大鼠血清瘦素、胰岛素、睾酮降低,补肾调经汤高剂量组与二甲双胍组在降低瘦素、胰岛素和睾酮水平方面作用相近。结论补肾调经汤可能通过对瘦素、胰岛素、睾酮的调节促进PCOS大鼠排卵。     

老年公寓中医药健康管理系统设计与应用

近年来,国内已有老年公寓尝试采用信息化手段完成对入住老人的健康管理,但是由于缺乏行业相关技术标准,各老年公寓健康管理信息化水平仍存在较大差异。本研究开发的老年公寓中医药健康管理系统包括具有中医特色的健康档案、实时动态的健康状态监测与评估以及中医知识库等。本文还介绍了系统功能与特色,系统具备技术架构先进、安全可靠等特点,可提升老年公寓入住人群的生存质量。     

黄振翘治疗再生障碍性贫血的经验

黄振翘教授擅长运用中医药治疗再生障碍性贫血等疑难血液病 ,认为再障治疗宜掌握标本缓急 ;注重补肾泻肝 ;扶正不忘祛邪 ;强调整体治疗 ,临床取得了良好疗效。     

Influence of moxa smoke on mitochondrial transmembrane potential and Bax/Bcl-2 in alveolar type II epithelial A549 cells

Objective

To investigate the influence of moxibustion products on mitochondrial transmembrane potential (MTP) and mRNA expression of Bax/Bcl-2 in alveolar type II epithelial A549 cells, and to further explore influence of moxibustion products on the oxidative damage of A549 cells.

Methods

Smoke and particles generated by moxibustion were collected using the filter box for gas sampling. The moxa smoke extract (MSE) was diluted sequentially to the final concentrations of 0.05 mg/mL, 0.1 mg/mL, 0.2 mg/mL, 0.3 mg/mL and 0.4 mg/mL using the cell culture medium, and A549 cells were then intervened by the above MSE solution. Cell MTP was detected by JC-1 staining. Fluorescence quantitative polymerase chain reaction (PCR) was used to detect Bax/Bcl-2 mRNA expression of A549 cells.

Results

Compared with cells in the normal control group, MTP was significantly decreased in cells of 0.3 mg/mL and 0.4 mg/mL MSE intervention groups (P<0.01); while MTP showed no significant changes in cells of 0.05 mg/mL, 0.1 mg/mL and 0.2 mg/mL MSE intervention groups (P>0.05); compared with cells in 0.05 mg/mL MSE intervention group, MTP was decreased significantly in cells of 0.1 mg/mL, 0.2 mg/mL, 0.3 mg/mL and 0.4 mg/mL MSE intervention groups (P<0.05 ); compared with cells in 0.1 mg/mL MSE intervention group, MTP was decreased significantly in cells of 0.4 mg/mL MSE intervention group (P<0.01). Bax mRNA expression of cells in each concentration of MSE intervention group all showed no significant difference compared to that in the normal control group; Bcl-2 mRNA expression of cells was reduced with the increase of MSE intervention concentration. Wherein, Bcl-2 mRNA expressions of cells in 0.4 mg/mL and 0.3 mg/mL MSE intervention groups were significantly reduced compared with that of cells in the normal control group (P<0.05); Bcl-2 mRNA expression of cells in 0.4 mg/mL MSE intervention group was significantly reduced compared to that in 0.05 mg/mL MSE intervention group (P<0.05).

Conclusion

Certain higher concentration of moxa smoke could reduce MTP and mRNA expression of the anti-apoptosis gene Bcl-2 in alveolar type II epithelial A549 cells. Oxidative damage may be the important mechanism of apoptosis caused by the high concentration of moxa smoke solution, and further studies are necessary on the specific mechanisms.

     

慢性ITP外周血单个核细胞Th1/Th2亚群反应状态及生血灵干预研究

目的探讨辅助性T淋巴细胞亚群Th1、Th2在慢性特发性血小板减少性紫癜(ITP)发病中的作用,观察生血灵对慢性ITP Th1、Th2亚群功能状态的影响。方法以酶联免疫吸附法(ELISA法)检测慢性ITP患者外周血单个核细胞(PBMC)培养上清中Th1型细胞因子IL-2和Th2型细胞因子IL-10的水平。结果慢性ITP患者PBMC培养上清中IL-2和IL-10的含量均较正常对照组明显减低(P均<0.001),生血灵对其具有明显提升作用(P<0.01)。结论慢性ITP患者Th亚群免疫功能低下。生血灵治疗慢性ITP能够增强Th亚群免疫功能,恢复其平衡。