Objective:To investigate the estrogenic effect of(8,9)-furanyl-pterocarpan-3-ol(FPC)on growth of human breast cancer T47D cells and the interactions between the FPC and tamoxifen(TAM),on the growth of estrogen recepto...Objective:To investigate the estrogenic effect of(8,9)-furanyl-pterocarpan-3-ol(FPC)on growth of human breast cancer T47D cells and the interactions between the FPC and tamoxifen(TAM),on the growth of estrogen receptor-dependent breast cancer T47D cells.Methods:The proliferation effect of FPC were conducted on T47D cells in vitro by MTT test.T47D cells were treated with FPC alone(0.01-200μmol/L)or in combination with TAM 20 nmol/L.Furthermore,the expression of ERαor c-Myc were also determined by immunohistochemistry.Results:The results indicated that administration of an anti-estrogen TAM showed growth inhibitory effect on T47D cells,wheraes co-administered with low concentration(less than 1μmol/L)of FPC attenuated to promote cell proliferation.In contrast,the combination of TAM with higher doses(more than 20μmol/L)of FPC showed growth inhibitory.This result was supported by immunocytochemistry studies that the administration of 20 nmol/L TAM down-regulated ER-αand c-Myc,but the combination of 20 nmol/L TAM and 1μmol/L FPC robustly up-regulated expression of ER-α.Thus,the reduced growth inhibition of TAM 20 nmol/L by FPC 1μmol/L on T47D cells may act via the modulation of ER-α.Conclusions:The findings indicate and suggest that FPC had estrogenic activity at low concentrations and anti-estrogenic effect that are likely to be regulated by c-Myc and estrogen receptors.We also confirm that low concentration of FPC attenuated the growth-inhibitory effects of TAM on mammary tumor prevention.Therefore,the present study suggests that caution is warranted regarding the consumption of dietary FPC by breast cancer patients while on TMA therapy.展开更多
The discovery of 2D organic semiconductors of atomically thin structures has attracted great attention due to their emerging optical, electronic, optoelectronic and mechatronic properties. Recent progress in such orga...The discovery of 2D organic semiconductors of atomically thin structures has attracted great attention due to their emerging optical, electronic, optoelectronic and mechatronic properties. Recent progress in such organic nanostructures has opened new opportunities for engineering material properties in many ways, such as, 0D/1D/2D nanoparticles hybridization, strain engineering, atomic doping etc. Moreover, 2D organic nanostructures exhibit a unique feature of bio–functionality and are highly sensitive to bio-analytes. Such peculiar behavior in 2D organics can be utilized to design highly-efficient bio-sensors. Also, a bio-molecular integrated electronic/optoelectronic device with enhanced performance can be attained. Furthermore, the bio-degradable, biocompatible, biometabolizable, non-toxic behaviour and natural origin of organic nanomaterials can address the current ecological concerns of increasing inorganic material based electronic waste. This review highlights the benefits of 2D organic semiconductors. Considering the importance of strategic techniques for growing thin 2D organic layers,this review summarizes progress towards this direction. The possible challenges for long-time stability and future research directions in 2D organic nano electronics/optoelectronics are also discussed. We believe that this review article provides immense research interests in organic 2D nanotechnology for exploiting green technologies in the future.展开更多
Polymer light-emitting electrochemical cells (PLECs) employ a thin layer of a luminescent conjugated polymer admixed with an ionic source and an ionic conductor for the in-situ formation of p-i-n junction and subseque...Polymer light-emitting electrochemical cells (PLECs) employ a thin layer of a luminescent conjugated polymer admixed with an ionic source and an ionic conductor for the in-situ formation of p-i-n junction and subsequent efficient injections of both electrons and holes.The junction formation enables the use of air-stable conductors as the cathode and a relatively thick emissive polymer layer that is more compatible with low-cost solution-based processes.This paper overviews the operation mechanism of the PLECs,the properties and drawbacks of the devices.The employment of crosslinkable ionic conductors to stabilize the p-i-n junction is reviewed.The resulting static junction electroluminesces light at high brightness,high efficiency,and prolonged lifetime.Silver paste and carbon nanotubes can be used as the cathode,thus,PLECs were fabricated by lamination.Using single wall carbon nanotubes coated elastic substrate as both anode and cathode,the PLECs can be made highly stretchable.展开更多
目的前期研究发现中药连翘醇提物具有明显体外抑制肿瘤细胞的作用,文章进一步探讨从中药连翘提取的化合物达玛-24-烯-3β-乙酰氧基-20s-醇(Dammar-24-ene-3β-acetate-20S-ol,DM)体外抗肿瘤作用及其机制。方法采用MTT法检测DM对胃癌细胞...目的前期研究发现中药连翘醇提物具有明显体外抑制肿瘤细胞的作用,文章进一步探讨从中药连翘提取的化合物达玛-24-烯-3β-乙酰氧基-20s-醇(Dammar-24-ene-3β-acetate-20S-ol,DM)体外抗肿瘤作用及其机制。方法采用MTT法检测DM对胃癌细胞株SGC-7901、BGC-823和MKN-45体外抑制作用。实验分为MKN-45对照组及其低、高剂量组,BGC-823对照组及其低、高剂量组,SGC-7901对照组及其低、高剂量组,对照组均为新鲜培养基,低剂量DM为10、50μg/m L,流式细胞仪检测凋亡细胞比例。应用Cell Quest软件分析结果,记录细胞不同周期的比例。采用DCFH-DA探针检测ROS水平,实验分为空白对照组,多西紫杉醇组和DM组。配置微管聚集实验反应体系,其中多西紫杉醇10μmol/L,DM终浓度选择50或100μmol/L,空白对照组不加药物,采用微管聚集实验和微管蛋白免疫荧光染色研究DM对于微管系统的影响。结果 50μg/m L对于3株胃癌细胞抑制率均在80%以上,IC50分别为:MKN-45(11.72±1.35)μg/m L;BGC-823(17.19±0.82)μg/m L;SGC-7901(7.55±0.79)μg/m L。2μg/m L DM处理48 h后再以低密度培养8 d,细胞克隆较对照组明显减少。与MKN-45对照组凋亡细胞[(21.1±2.5)%]相比,MKN-45低剂量组和高剂量组凋亡细胞比率[(25.1±1.3)%和(55.2±2.3)%]均有明显升高(P<0.01)。BGC-823对照组凋亡细胞百分率(13.2±2.4)%比较,BGC-823低、高剂量组凋亡细胞百分率[(18.2±2.1)%、(41.8±2.8)%]明显升高(P<0.01)。与SGC-7901对照组凋亡细胞率[(10.5±1.8)%]比较,SGC-7901高剂量DM组凋亡细胞率[(21.1±1.9)%]升高(P<0.05),而与SGC-7901低剂量DM组[(12.3±1.6)%]差异无统计学意义(P>0.05)。与MKN-45对照组比较,MKN-45低剂量组S期细胞百分率降低[(14.5±2.7)%vs(12.3±3.3)%,P>0.05]。与BGC-823对照组比较,BGC-823低剂量组细胞S期百分率增加[(12.2±5.4)%vs(20.2±2.1)%,P<0.05]。与SGC-7901对照组比较,SGC-7901低剂量组S期细胞百分率增加[(21.5±3.8)%vs(31.3±2.6%),P<0.05]。检测DM处理后细胞内活性氧水平研究发现,10、50μg/m L DM处理48 h 3株细胞均可见剂量依赖性ROS水平上升。微管蛋白免疫荧光染色可见采用IC50浓度的多西紫杉醇和10μg/m L DM处理48 h后,MKN-45荧光信号均表现为局部浓聚、紊乱。结论达玛-24-烯-3β-乙酰氧基-20s-醇能够将胃癌细胞周期阻滞于S期,诱导细胞凋亡,从而抑制细胞增殖作用。展开更多
基金Supported in part by Hibah Competition Grant Research of Faculty of PharmacyGadjah Mada University(Grant No.UGM/FA/851.d/M/05/01)
文摘Objective:To investigate the estrogenic effect of(8,9)-furanyl-pterocarpan-3-ol(FPC)on growth of human breast cancer T47D cells and the interactions between the FPC and tamoxifen(TAM),on the growth of estrogen receptor-dependent breast cancer T47D cells.Methods:The proliferation effect of FPC were conducted on T47D cells in vitro by MTT test.T47D cells were treated with FPC alone(0.01-200μmol/L)or in combination with TAM 20 nmol/L.Furthermore,the expression of ERαor c-Myc were also determined by immunohistochemistry.Results:The results indicated that administration of an anti-estrogen TAM showed growth inhibitory effect on T47D cells,wheraes co-administered with low concentration(less than 1μmol/L)of FPC attenuated to promote cell proliferation.In contrast,the combination of TAM with higher doses(more than 20μmol/L)of FPC showed growth inhibitory.This result was supported by immunocytochemistry studies that the administration of 20 nmol/L TAM down-regulated ER-αand c-Myc,but the combination of 20 nmol/L TAM and 1μmol/L FPC robustly up-regulated expression of ER-α.Thus,the reduced growth inhibition of TAM 20 nmol/L by FPC 1μmol/L on T47D cells may act via the modulation of ER-α.Conclusions:The findings indicate and suggest that FPC had estrogenic activity at low concentrations and anti-estrogenic effect that are likely to be regulated by c-Myc and estrogen receptors.We also confirm that low concentration of FPC attenuated the growth-inhibitory effects of TAM on mammary tumor prevention.Therefore,the present study suggests that caution is warranted regarding the consumption of dietary FPC by breast cancer patients while on TMA therapy.
基金financial support from National Science Foundation China (No. 61775147)Australian Research Council (ARC) No. DP180103238
文摘The discovery of 2D organic semiconductors of atomically thin structures has attracted great attention due to their emerging optical, electronic, optoelectronic and mechatronic properties. Recent progress in such organic nanostructures has opened new opportunities for engineering material properties in many ways, such as, 0D/1D/2D nanoparticles hybridization, strain engineering, atomic doping etc. Moreover, 2D organic nanostructures exhibit a unique feature of bio–functionality and are highly sensitive to bio-analytes. Such peculiar behavior in 2D organics can be utilized to design highly-efficient bio-sensors. Also, a bio-molecular integrated electronic/optoelectronic device with enhanced performance can be attained. Furthermore, the bio-degradable, biocompatible, biometabolizable, non-toxic behaviour and natural origin of organic nanomaterials can address the current ecological concerns of increasing inorganic material based electronic waste. This review highlights the benefits of 2D organic semiconductors. Considering the importance of strategic techniques for growing thin 2D organic layers,this review summarizes progress towards this direction. The possible challenges for long-time stability and future research directions in 2D organic nano electronics/optoelectronics are also discussed. We believe that this review article provides immense research interests in organic 2D nanotechnology for exploiting green technologies in the future.
基金supported by the National Science Foundation (ECCS1028412)
文摘Polymer light-emitting electrochemical cells (PLECs) employ a thin layer of a luminescent conjugated polymer admixed with an ionic source and an ionic conductor for the in-situ formation of p-i-n junction and subsequent efficient injections of both electrons and holes.The junction formation enables the use of air-stable conductors as the cathode and a relatively thick emissive polymer layer that is more compatible with low-cost solution-based processes.This paper overviews the operation mechanism of the PLECs,the properties and drawbacks of the devices.The employment of crosslinkable ionic conductors to stabilize the p-i-n junction is reviewed.The resulting static junction electroluminesces light at high brightness,high efficiency,and prolonged lifetime.Silver paste and carbon nanotubes can be used as the cathode,thus,PLECs were fabricated by lamination.Using single wall carbon nanotubes coated elastic substrate as both anode and cathode,the PLECs can be made highly stretchable.
文摘目的前期研究发现中药连翘醇提物具有明显体外抑制肿瘤细胞的作用,文章进一步探讨从中药连翘提取的化合物达玛-24-烯-3β-乙酰氧基-20s-醇(Dammar-24-ene-3β-acetate-20S-ol,DM)体外抗肿瘤作用及其机制。方法采用MTT法检测DM对胃癌细胞株SGC-7901、BGC-823和MKN-45体外抑制作用。实验分为MKN-45对照组及其低、高剂量组,BGC-823对照组及其低、高剂量组,SGC-7901对照组及其低、高剂量组,对照组均为新鲜培养基,低剂量DM为10、50μg/m L,流式细胞仪检测凋亡细胞比例。应用Cell Quest软件分析结果,记录细胞不同周期的比例。采用DCFH-DA探针检测ROS水平,实验分为空白对照组,多西紫杉醇组和DM组。配置微管聚集实验反应体系,其中多西紫杉醇10μmol/L,DM终浓度选择50或100μmol/L,空白对照组不加药物,采用微管聚集实验和微管蛋白免疫荧光染色研究DM对于微管系统的影响。结果 50μg/m L对于3株胃癌细胞抑制率均在80%以上,IC50分别为:MKN-45(11.72±1.35)μg/m L;BGC-823(17.19±0.82)μg/m L;SGC-7901(7.55±0.79)μg/m L。2μg/m L DM处理48 h后再以低密度培养8 d,细胞克隆较对照组明显减少。与MKN-45对照组凋亡细胞[(21.1±2.5)%]相比,MKN-45低剂量组和高剂量组凋亡细胞比率[(25.1±1.3)%和(55.2±2.3)%]均有明显升高(P<0.01)。BGC-823对照组凋亡细胞百分率(13.2±2.4)%比较,BGC-823低、高剂量组凋亡细胞百分率[(18.2±2.1)%、(41.8±2.8)%]明显升高(P<0.01)。与SGC-7901对照组凋亡细胞率[(10.5±1.8)%]比较,SGC-7901高剂量DM组凋亡细胞率[(21.1±1.9)%]升高(P<0.05),而与SGC-7901低剂量DM组[(12.3±1.6)%]差异无统计学意义(P>0.05)。与MKN-45对照组比较,MKN-45低剂量组S期细胞百分率降低[(14.5±2.7)%vs(12.3±3.3)%,P>0.05]。与BGC-823对照组比较,BGC-823低剂量组细胞S期百分率增加[(12.2±5.4)%vs(20.2±2.1)%,P<0.05]。与SGC-7901对照组比较,SGC-7901低剂量组S期细胞百分率增加[(21.5±3.8)%vs(31.3±2.6%),P<0.05]。检测DM处理后细胞内活性氧水平研究发现,10、50μg/m L DM处理48 h 3株细胞均可见剂量依赖性ROS水平上升。微管蛋白免疫荧光染色可见采用IC50浓度的多西紫杉醇和10μg/m L DM处理48 h后,MKN-45荧光信号均表现为局部浓聚、紊乱。结论达玛-24-烯-3β-乙酰氧基-20s-醇能够将胃癌细胞周期阻滞于S期,诱导细胞凋亡,从而抑制细胞增殖作用。
