Objective To determine the main components of Astragalus membranaceus(Fisch.)Bge(A.membranaceus,Huang Qi),Astragaloside IV(AIV)and Astragalus polysaccharides(AP),to characterize their properties,evaluate their in vivo...Objective To determine the main components of Astragalus membranaceus(Fisch.)Bge(A.membranaceus,Huang Qi),Astragaloside IV(AIV)and Astragalus polysaccharides(AP),to characterize their properties,evaluate their in vivo efficacy,and to analyze drug diffusion using dissolving microneedle(DMN)technology in vivo.Methods Respectively,AIV-and AP-loaded DMNs comprising chitosan(CTS)and polyvinyl alcohol(PVA)were prepared via dual-mold forming.Their morphology,mechanical properties,in vivo solubility,and skin irritation characteristics were tested.In vivo efficacy was assessed in cyclophosphamide-induced immunosuppressed mice,in vivo diffusion of AIV and AP by DMNs and conventional methods was compared,and the rheological properties of AIV-CTS-PVA and AP-CTS-PVA mixtures were measured.Results Subcutaneous dissolution and absorption of AIV-CTS-PVA and AP-CTS-PVA microneedles(MNs)at low doses(50%–17%of intraperitoneal AIV injection and 12%–4%of intravenous AP injection)reduced the spleen index and acid phosphatase activity in immunosuppressed mouse models,increased the thymus index,and achieved equivalent or better systemic therapeutic effects.Compared with injections,AIV and AP achieved controllable solid-liquid conversion through delivery with CTS-PVA MNs,resulting in highly localized aggregation within 48 h,reducing the initial explosive effect of the drug,and achieving stable and slow drug release.Conclusion The present study enhances our understanding of the efficacy and remote effects of drug-loaded DMNs from a traditional Chinese medicine(TCM)perspective,thereby promoting the development of precise and efficient delivery of TCM and further expanding the drug-loading range and application scenarios for DMNs.展开更多
背景与目的目前,云南个旧锡矿有大量矿工从事开采工作,这种职业环境与接触粉尘颗粒、重金属、多环芳烃和放射性氡有关,大大增加了患肺癌的风险。本研究旨在探讨在云锡矿粉诱导大鼠肺泡Ⅱ型上皮细胞(immortalized rat alveolar cells ty...背景与目的目前,云南个旧锡矿有大量矿工从事开采工作,这种职业环境与接触粉尘颗粒、重金属、多环芳烃和放射性氡有关,大大增加了患肺癌的风险。本研究旨在探讨在云锡矿粉诱导大鼠肺泡Ⅱ型上皮细胞(immortalized rat alveolar cells type Ⅱ,RLE-6TN)恶性转化过程中,瘦素(leptin)及其介导的细胞外调节蛋白激酶(extracellular regulated protein kinase,ERK)信号通路所起的作用。方法采用200μg/mL的云锡矿粉隔代毒染RLE-6TN至第9代,建立毒染细胞模型,命名为R_(200)细胞,正常培养组命名为R细胞,通过Western blot法检测两种细胞leptin受体的表达情况。通过MTT法筛选出leptin及丝裂原活化蛋白激酶激酶(mitogen-activated protein kinase kinase,MEK)抑制剂(U0126)对R_(200)细胞的最佳作用浓度。自第20代起,将R组、R_(200)组细胞分别与leptin及MEK抑制剂U0126共培养,对各组细胞的形态改变进行观察,并利用苏木素-伊红(hematoxylin-eosin,HE)染色技术鉴别第40代细胞的形态学差异,通过刀豆凝集素A(concanavalin A,ConA)及锚着独立性生长实验法检测细胞恶性转化情况。通过Western blot法检测leptin作用后上皮细胞ERK信号通路的变化。结果R组和R_(200)组细胞均表达leptin受体(OB-R)。与R_(200)组比较,当leptin浓度达100 ng/mL时,其促增殖效应最为显著,30μmol/L U0126可抑制毒染细胞R_(200)增殖,与对照组相比具有统计学差异(P<0.05)。自第25代起,leptin诱导的R_(200)组(R_(200)L组)细胞形态发生变化,至第30代出现恶性转化,至第40代时恶性转化特征明显;而R_(200)组细胞及U0126诱导的R_(200)组(R_(200)LU组)细胞则在第40代时才出现恶性转化特征。R_(200)L组细胞凝集速度较R_(200)LU组快,其余各组细胞P30出现凝集,且随ConA浓度增加,细胞凝集速度加快。R_(200)L组细胞自P40可见克隆形成,克隆形成率为2.25‰±0.5‰,R_(200)LU组及R_(200)组未见克隆集落。R_(200)L组细胞pERK表达增强;加入U0126阻断后,R_(200)L组细胞pERK磷酸化水平降低。结论Leptin可以促进云锡矿粉毒染肺上皮细胞的恶性转化,ERK信号通路可能是其促进云锡矿粉引发的肺泡Ⅱ型上皮细胞转化的重要途径。展开更多
Objective:To develop a novel diagnostic modality to identify and diagnose stroke in daily life scenarios for improving the therapeutic effects and prognoses of patients.Methods:In this study,16 stroke patients and 24 ...Objective:To develop a novel diagnostic modality to identify and diagnose stroke in daily life scenarios for improving the therapeutic effects and prognoses of patients.Methods:In this study,16 stroke patients and 24 age-matched healthy participants as controls were recruited for comparative analysis.Leveraging a portable eye-tracking device and integrating traditional Chinese medicine theory with modern color psychology principles,we recorded the eye movement signals and calculated eye movement features.Meanwhile,the stroke recognition models based on eye movement features were further trained by using random forest(RF),k-nearest neighbors(KNN),decision tree(DT),gradient boosting classifier(GBC),XGBoost,and CatBoost.Results:The stroke group and the healthy group showed significant differences in some eye movement features(P<.05).The models trained based on eye movement characteristics had good performances in recognizing stroke individuals,with accuracies ranging from 77.40%to 88.45%.Under the red stimulus,the eye movement model trained by RF became the best machine learning model with a recall of 84.65%,a precision of 86.48%,a F1 score of 85.47%.Among the six algorithms,RF and CatBoost performed better in classification.Conclusion:This study pioneers the application of traditional Chinese medicine's five-color stimuli to visual observation tasks.On the basis of the combined design,the eye-movement models can accurately identify stroke,and the developed high-performance models may be used in daily life scenarios.展开更多
Objective:To use three-dimensional(3D)printing technology to prepare Dashanzha Wan.Methods:The standard formula proportion of Dashanzha Wan was used to prepare printable materials(normally called the ink)for 3D printi...Objective:To use three-dimensional(3D)printing technology to prepare Dashanzha Wan.Methods:The standard formula proportion of Dashanzha Wan was used to prepare printable materials(normally called the ink)for 3D printing,and different doses and shapes of Dashanzha Wan were prepared.Then,the rheological properties,texture characteristics,scanning electron microscopy,and content of ursolic acid were evaluated.Results:Dashanzha Wan ink showed good shear thinning properties,which is very suitable for 3D printing.The printed sample had a beautiful and regular shape with high resolution.Meanwhile,ursolic acid content in 3D-printed Dashanzha Wan aligned with the ursolic acid content shown in the Pharmacopoeia of the People's Republic of China 2020.Conclusion:The 3D-printed Dashanzha Wan has a better texture,and can be shaped into various shapes according to individual needs,which would increase patients’interest when taking medicine.Moreover,3D printing of Dashanzha Wan could be easily integrated into the digital life system,enabling online customization or use at home.This study reveals that 3D printing technology is a promising method for the production of traditional Chinese medicine with personalized appearance,dosage,and texture,which is suitable for a broader population.展开更多
基金supported by the National Natural Science Foundation of China(82274225)NATCM's Project of High-level Construction of Key TCM Disciplines-Beijing University of Chinese Medicine-Life Science from the Perspective of Chinese Medicine(zyyzdxk-2023263).
文摘Objective To determine the main components of Astragalus membranaceus(Fisch.)Bge(A.membranaceus,Huang Qi),Astragaloside IV(AIV)and Astragalus polysaccharides(AP),to characterize their properties,evaluate their in vivo efficacy,and to analyze drug diffusion using dissolving microneedle(DMN)technology in vivo.Methods Respectively,AIV-and AP-loaded DMNs comprising chitosan(CTS)and polyvinyl alcohol(PVA)were prepared via dual-mold forming.Their morphology,mechanical properties,in vivo solubility,and skin irritation characteristics were tested.In vivo efficacy was assessed in cyclophosphamide-induced immunosuppressed mice,in vivo diffusion of AIV and AP by DMNs and conventional methods was compared,and the rheological properties of AIV-CTS-PVA and AP-CTS-PVA mixtures were measured.Results Subcutaneous dissolution and absorption of AIV-CTS-PVA and AP-CTS-PVA microneedles(MNs)at low doses(50%–17%of intraperitoneal AIV injection and 12%–4%of intravenous AP injection)reduced the spleen index and acid phosphatase activity in immunosuppressed mouse models,increased the thymus index,and achieved equivalent or better systemic therapeutic effects.Compared with injections,AIV and AP achieved controllable solid-liquid conversion through delivery with CTS-PVA MNs,resulting in highly localized aggregation within 48 h,reducing the initial explosive effect of the drug,and achieving stable and slow drug release.Conclusion The present study enhances our understanding of the efficacy and remote effects of drug-loaded DMNs from a traditional Chinese medicine(TCM)perspective,thereby promoting the development of precise and efficient delivery of TCM and further expanding the drug-loading range and application scenarios for DMNs.
文摘背景与目的目前,云南个旧锡矿有大量矿工从事开采工作,这种职业环境与接触粉尘颗粒、重金属、多环芳烃和放射性氡有关,大大增加了患肺癌的风险。本研究旨在探讨在云锡矿粉诱导大鼠肺泡Ⅱ型上皮细胞(immortalized rat alveolar cells type Ⅱ,RLE-6TN)恶性转化过程中,瘦素(leptin)及其介导的细胞外调节蛋白激酶(extracellular regulated protein kinase,ERK)信号通路所起的作用。方法采用200μg/mL的云锡矿粉隔代毒染RLE-6TN至第9代,建立毒染细胞模型,命名为R_(200)细胞,正常培养组命名为R细胞,通过Western blot法检测两种细胞leptin受体的表达情况。通过MTT法筛选出leptin及丝裂原活化蛋白激酶激酶(mitogen-activated protein kinase kinase,MEK)抑制剂(U0126)对R_(200)细胞的最佳作用浓度。自第20代起,将R组、R_(200)组细胞分别与leptin及MEK抑制剂U0126共培养,对各组细胞的形态改变进行观察,并利用苏木素-伊红(hematoxylin-eosin,HE)染色技术鉴别第40代细胞的形态学差异,通过刀豆凝集素A(concanavalin A,ConA)及锚着独立性生长实验法检测细胞恶性转化情况。通过Western blot法检测leptin作用后上皮细胞ERK信号通路的变化。结果R组和R_(200)组细胞均表达leptin受体(OB-R)。与R_(200)组比较,当leptin浓度达100 ng/mL时,其促增殖效应最为显著,30μmol/L U0126可抑制毒染细胞R_(200)增殖,与对照组相比具有统计学差异(P<0.05)。自第25代起,leptin诱导的R_(200)组(R_(200)L组)细胞形态发生变化,至第30代出现恶性转化,至第40代时恶性转化特征明显;而R_(200)组细胞及U0126诱导的R_(200)组(R_(200)LU组)细胞则在第40代时才出现恶性转化特征。R_(200)L组细胞凝集速度较R_(200)LU组快,其余各组细胞P30出现凝集,且随ConA浓度增加,细胞凝集速度加快。R_(200)L组细胞自P40可见克隆形成,克隆形成率为2.25‰±0.5‰,R_(200)LU组及R_(200)组未见克隆集落。R_(200)L组细胞pERK表达增强;加入U0126阻断后,R_(200)L组细胞pERK磷酸化水平降低。结论Leptin可以促进云锡矿粉毒染肺上皮细胞的恶性转化,ERK信号通路可能是其促进云锡矿粉引发的肺泡Ⅱ型上皮细胞转化的重要途径。
基金supported by the scientific research project from Beijing University of Chinese Medicine(2022-JYB-JBZR-034)。
文摘Objective:To develop a novel diagnostic modality to identify and diagnose stroke in daily life scenarios for improving the therapeutic effects and prognoses of patients.Methods:In this study,16 stroke patients and 24 age-matched healthy participants as controls were recruited for comparative analysis.Leveraging a portable eye-tracking device and integrating traditional Chinese medicine theory with modern color psychology principles,we recorded the eye movement signals and calculated eye movement features.Meanwhile,the stroke recognition models based on eye movement features were further trained by using random forest(RF),k-nearest neighbors(KNN),decision tree(DT),gradient boosting classifier(GBC),XGBoost,and CatBoost.Results:The stroke group and the healthy group showed significant differences in some eye movement features(P<.05).The models trained based on eye movement characteristics had good performances in recognizing stroke individuals,with accuracies ranging from 77.40%to 88.45%.Under the red stimulus,the eye movement model trained by RF became the best machine learning model with a recall of 84.65%,a precision of 86.48%,a F1 score of 85.47%.Among the six algorithms,RF and CatBoost performed better in classification.Conclusion:This study pioneers the application of traditional Chinese medicine's five-color stimuli to visual observation tasks.On the basis of the combined design,the eye-movement models can accurately identify stroke,and the developed high-performance models may be used in daily life scenarios.
基金supported by Seed Funding of the Beijing University of Chinese Medicine(90011451310034).
文摘Objective:To use three-dimensional(3D)printing technology to prepare Dashanzha Wan.Methods:The standard formula proportion of Dashanzha Wan was used to prepare printable materials(normally called the ink)for 3D printing,and different doses and shapes of Dashanzha Wan were prepared.Then,the rheological properties,texture characteristics,scanning electron microscopy,and content of ursolic acid were evaluated.Results:Dashanzha Wan ink showed good shear thinning properties,which is very suitable for 3D printing.The printed sample had a beautiful and regular shape with high resolution.Meanwhile,ursolic acid content in 3D-printed Dashanzha Wan aligned with the ursolic acid content shown in the Pharmacopoeia of the People's Republic of China 2020.Conclusion:The 3D-printed Dashanzha Wan has a better texture,and can be shaped into various shapes according to individual needs,which would increase patients’interest when taking medicine.Moreover,3D printing of Dashanzha Wan could be easily integrated into the digital life system,enabling online customization or use at home.This study reveals that 3D printing technology is a promising method for the production of traditional Chinese medicine with personalized appearance,dosage,and texture,which is suitable for a broader population.
