This work started out with the in-depth feasibil-ity study and limitation analysis on the current disease spread estimating and countermea-sures evaluating models, then we identify that the population variability is a...This work started out with the in-depth feasibil-ity study and limitation analysis on the current disease spread estimating and countermea-sures evaluating models, then we identify that the population variability is a crucial impact which has been always ignored or less empha-sized. Taking HIV/AIDS as the application and validation background, we propose a novel al-gorithm model system, EEA model system, a new way to estimate the spread situation, evaluate different countermeasures and analyze the development of ARV-resistant disease strains. The model is a series of solvable ordi-nary differential equation (ODE) models to es-timate the spread of HIV/AIDS infections, which not only require only one year’s data to deduce the situation in any year, but also apply the piecewise constant method to employ multi- year information at the same time. We simulate the effects of therapy and vaccine, then evaluate the difference between them, and offer the smallest proportion of the vaccination in the population to defeat HIV/AIDS, especially the advantage of using the vaccination while the deficiency of using therapy separately. Then we analyze the development of ARV-resistant dis-ease strains by the piecewise constant method. Last but not least, high performance computing (HPC) platform is applied to simulate the situa-tion with variable large scale areas divided by grids, and especially the acceleration rate will come to around 4 to 5.5.展开更多
目的通过观察用药后COX-2、Bcl-2和Survivin的变化,探讨丹皮酚(paeonol,Pae)诱导Eca-109食管癌裸鼠移植瘤凋亡的机制。方法体外培养食管癌Eca-109细胞,裸鼠皮下接种Eca-109细胞建立裸鼠移植瘤动物模型,36只荷瘤裸鼠随机分为6组,分别为...目的通过观察用药后COX-2、Bcl-2和Survivin的变化,探讨丹皮酚(paeonol,Pae)诱导Eca-109食管癌裸鼠移植瘤凋亡的机制。方法体外培养食管癌Eca-109细胞,裸鼠皮下接种Eca-109细胞建立裸鼠移植瘤动物模型,36只荷瘤裸鼠随机分为6组,分别为模型对照组、Pae不同剂量组(25、50、100、200mg·kg-1)和阳性药对照组(cisplatin,CD-DP,5mg·kg-1)。治疗2wk后处死裸鼠,剥取瘤体称瘤重并计算抑瘤率。用末端脱氧核苷酸转移酶介导的dUTP缺口末端标记(TUNEL)法检测肿瘤细胞凋亡。免疫组化S-P法检测移植瘤组织COX-2、Bcl-2和Survivin的表达。结果Pae50、100和200mg·kg-1组和CDDP5mg·kg-1组均能明显抑制裸鼠皮下肿瘤的生长,抑瘤率分别为23·54%、27·91%、34·46%和58·71%,与模型组比较差异均有显著性(P<0·05orP<0·01)。TUNEL染色可发现棕褐色的凋亡细胞呈散在或片状分布,Pae各剂量组的凋亡指数(apoptosis index,AI)分别为(11·02±2·58)%、(19·80±2·77)%、(24·48±4·35)%和(27·13±4·39)%,与模型组(4·81±0·83)%比较,差异均有显著性(P<0·05orP<0·01)。免疫组化结果显示,Pae能明显抑制移植瘤组织COX-2、Bcl-2和Survivin的表达(P<0·05 or P<0·01)。结论Pae能抑制Eca-109食管癌裸鼠移植瘤生长、诱导凋亡而发挥抗肿瘤作用,其机制可能与下调COX-2的表达并抑制Bcl-2和Sur-vivin的表达有关。展开更多
文摘This work started out with the in-depth feasibil-ity study and limitation analysis on the current disease spread estimating and countermea-sures evaluating models, then we identify that the population variability is a crucial impact which has been always ignored or less empha-sized. Taking HIV/AIDS as the application and validation background, we propose a novel al-gorithm model system, EEA model system, a new way to estimate the spread situation, evaluate different countermeasures and analyze the development of ARV-resistant disease strains. The model is a series of solvable ordi-nary differential equation (ODE) models to es-timate the spread of HIV/AIDS infections, which not only require only one year’s data to deduce the situation in any year, but also apply the piecewise constant method to employ multi- year information at the same time. We simulate the effects of therapy and vaccine, then evaluate the difference between them, and offer the smallest proportion of the vaccination in the population to defeat HIV/AIDS, especially the advantage of using the vaccination while the deficiency of using therapy separately. Then we analyze the development of ARV-resistant dis-ease strains by the piecewise constant method. Last but not least, high performance computing (HPC) platform is applied to simulate the situa-tion with variable large scale areas divided by grids, and especially the acceleration rate will come to around 4 to 5.5.
文摘目的通过观察用药后COX-2、Bcl-2和Survivin的变化,探讨丹皮酚(paeonol,Pae)诱导Eca-109食管癌裸鼠移植瘤凋亡的机制。方法体外培养食管癌Eca-109细胞,裸鼠皮下接种Eca-109细胞建立裸鼠移植瘤动物模型,36只荷瘤裸鼠随机分为6组,分别为模型对照组、Pae不同剂量组(25、50、100、200mg·kg-1)和阳性药对照组(cisplatin,CD-DP,5mg·kg-1)。治疗2wk后处死裸鼠,剥取瘤体称瘤重并计算抑瘤率。用末端脱氧核苷酸转移酶介导的dUTP缺口末端标记(TUNEL)法检测肿瘤细胞凋亡。免疫组化S-P法检测移植瘤组织COX-2、Bcl-2和Survivin的表达。结果Pae50、100和200mg·kg-1组和CDDP5mg·kg-1组均能明显抑制裸鼠皮下肿瘤的生长,抑瘤率分别为23·54%、27·91%、34·46%和58·71%,与模型组比较差异均有显著性(P<0·05orP<0·01)。TUNEL染色可发现棕褐色的凋亡细胞呈散在或片状分布,Pae各剂量组的凋亡指数(apoptosis index,AI)分别为(11·02±2·58)%、(19·80±2·77)%、(24·48±4·35)%和(27·13±4·39)%,与模型组(4·81±0·83)%比较,差异均有显著性(P<0·05orP<0·01)。免疫组化结果显示,Pae能明显抑制移植瘤组织COX-2、Bcl-2和Survivin的表达(P<0·05 or P<0·01)。结论Pae能抑制Eca-109食管癌裸鼠移植瘤生长、诱导凋亡而发挥抗肿瘤作用,其机制可能与下调COX-2的表达并抑制Bcl-2和Sur-vivin的表达有关。
