The traditional Chinese medicine tripterygium glycosides(TPG)is used clinically to treat some Rheumatism,Eczema,immunosuppression and tumor,with the activities of hypnosis,antipyretic,analgesic,antiinflammatory,allerg...The traditional Chinese medicine tripterygium glycosides(TPG)is used clinically to treat some Rheumatism,Eczema,immunosuppression and tumor,with the activities of hypnosis,antipyretic,analgesic,antiinflammatory,allergy and antitumor.However TPG has low water solubility and low skin permeability,so its clinical use is limited.Transdermal delivery systems can provide a controlled drug release rate that can keep constant concentrations of drug in the plasma for up to multiple days,improved patient compliance,and the possibility ofreducing the rate and severity of side effects.In this study,a fast and sensitive technique skin-blood two sites synchronous microdialysis coupled with LC-MS was used to study the pharmacokinetic parameter of three different formulations(TPG nanoemulsion,TPG nanoemulsion based gels and TPG gel).Creating a multilayer model,use the model to simulate the three formulations dynamics in transdermal-drug delivery system.The experiment results showed that the TPG nanoemulsion,TPG nanoemulsion based gels can significantly raise the drug concentrations in skin more than that of TPG gels.The numerical simulation results indicating that TPG gel and TPG nanoemulsion are close to practical measurements,only in the concentration increase phase the numerical simulation result has some difference with the experimental results.TPG nanoemulsion based gels have significant difference with the experimental results,both in concentration increase stage and concentration decreasing stage,but its trend was same.The study shows that the skin-blood synchronous microdialysis technique provided a new method for the pharmacokinetics study of nanocarriers transdermal delivery systems.In addition,the microdialysis technique combined with mathematical modeling provides a very good platform for the further study of transdermal delivery system.展开更多
乳腺癌是全球女性中最常见的癌症,目前乳腺癌治疗的主要挑战是治疗耐药性和疾病进展。"癌症干细胞"理论研究认为乳腺癌干细胞(Breast cancer stem cells,BCSCs)是癌症形成的种子,在乳腺癌的起始、复发和化学或放射疗法抗性中...乳腺癌是全球女性中最常见的癌症,目前乳腺癌治疗的主要挑战是治疗耐药性和疾病进展。"癌症干细胞"理论研究认为乳腺癌干细胞(Breast cancer stem cells,BCSCs)是癌症形成的种子,在乳腺癌的起始、复发和化学或放射疗法抗性中起关键作用。因此,消除BCSCs对于乳腺癌的治疗至关重要。然而,传统的化疗和放射疗法不能有效地根除BCSCs,"智能"纳米载体通过克服它们的生物利用度问题,在特异性和有效抗BCSCs治疗方面可以将BCSCs与其他乳腺癌细胞区分开,在靶向所需部位时更精确,最大化了治疗效果。同时,最大限度地减少了对身体其他部位的不良反应。本综述概括了BCSCs的起源、生物标志物及其耐药机制,然后讨论了纳米药物载体在乳腺癌中的应用现状。展开更多
Mesoporous silica has been widely explored for biomedical applications due to its unique structure and good biocompatibility. In particular it exhibits superior properties as micro/nano-carriers in the biomedical fiel...Mesoporous silica has been widely explored for biomedical applications due to its unique structure and good biocompatibility. In particular it exhibits superior properties as micro/nano-carriers in the biomedical field. We explore their potentials in controlled drug/gene co-delivery and photodynamic therapy for cancer treatment both in vitro and in vivo. By incorporating mesoporous silica nanoparticles（MSNP） with two-dimensional nanomaterial, graphene oxide nano-sheet, we utilize MSNP in cellular bio-imaging with squaraine dye. Meanwhile, through delicate combination between mesoporous silica micro/nano carriers with catalytic/bio-catalytic reactions, we manage to achieve self-propelled micro/nano-motors based on mesoporous silica that are capable of transporting cargos in an active manner. Especially, enzyme powered mesoporous silica motors can be powered by physiologically available fuels such as glucose and urea,which are advantageous for future biomedical use. Motion control on both velocity and movement direction provides a powerful tool for targeted drug delivery. Therefore, such mesoporous silica based active carriers pave way to the solution of targeted drug delivery for cancer treatment in future nano-medicine field.展开更多
Cancer refers to a collection of diseases that have abnormal cell growth as their hallmark.This inability of cytotoxic agents to distinguish between rapidly dividing healthy cells and rapidly multiplying cancerous cel...Cancer refers to a collection of diseases that have abnormal cell growth as their hallmark.This inability of cytotoxic agents to distinguish between rapidly dividing healthy cells and rapidly multiplying cancerous cells produces the most notorious adverse effects of cytotoxic anticancer agents.As an essential tool in nanotechnology,nanoemulsions have therapeutic and clinical applications.Currently,nanoemulsions are considered to be one of the most feasible nano-carriers for delivering lipophilic antineoplastic agents with targeted delivery.In addition to solving water-solubilization issues,these formulations deliver specific targeting to cancer cells and might even be developed to overcome multi-drug resistance.Nanoemulsions overcome the problems associated with conventional drug delivery systems,such as low bioavailability and noncompliance.A review of nanoemulsion in cancer therapeutics is presented here to shed light on the current position of this technology.展开更多
基金The project supported by National Natural Science Foundation of China(81573613,81373896)the Major Program for the Fundamental Research of Shanghai Committee of Science and Technology(14JC1491300)Open Fund of State Key Laboratory of Natural Medicines(SKLNMKF201612)
文摘The traditional Chinese medicine tripterygium glycosides(TPG)is used clinically to treat some Rheumatism,Eczema,immunosuppression and tumor,with the activities of hypnosis,antipyretic,analgesic,antiinflammatory,allergy and antitumor.However TPG has low water solubility and low skin permeability,so its clinical use is limited.Transdermal delivery systems can provide a controlled drug release rate that can keep constant concentrations of drug in the plasma for up to multiple days,improved patient compliance,and the possibility ofreducing the rate and severity of side effects.In this study,a fast and sensitive technique skin-blood two sites synchronous microdialysis coupled with LC-MS was used to study the pharmacokinetic parameter of three different formulations(TPG nanoemulsion,TPG nanoemulsion based gels and TPG gel).Creating a multilayer model,use the model to simulate the three formulations dynamics in transdermal-drug delivery system.The experiment results showed that the TPG nanoemulsion,TPG nanoemulsion based gels can significantly raise the drug concentrations in skin more than that of TPG gels.The numerical simulation results indicating that TPG gel and TPG nanoemulsion are close to practical measurements,only in the concentration increase phase the numerical simulation result has some difference with the experimental results.TPG nanoemulsion based gels have significant difference with the experimental results,both in concentration increase stage and concentration decreasing stage,but its trend was same.The study shows that the skin-blood synchronous microdialysis technique provided a new method for the pharmacokinetics study of nanocarriers transdermal delivery systems.In addition,the microdialysis technique combined with mathematical modeling provides a very good platform for the further study of transdermal delivery system.
文摘乳腺癌是全球女性中最常见的癌症,目前乳腺癌治疗的主要挑战是治疗耐药性和疾病进展。"癌症干细胞"理论研究认为乳腺癌干细胞(Breast cancer stem cells,BCSCs)是癌症形成的种子,在乳腺癌的起始、复发和化学或放射疗法抗性中起关键作用。因此,消除BCSCs对于乳腺癌的治疗至关重要。然而,传统的化疗和放射疗法不能有效地根除BCSCs,"智能"纳米载体通过克服它们的生物利用度问题,在特异性和有效抗BCSCs治疗方面可以将BCSCs与其他乳腺癌细胞区分开,在靶向所需部位时更精确,最大化了治疗效果。同时,最大限度地减少了对身体其他部位的不良反应。本综述概括了BCSCs的起源、生物标志物及其耐药机制,然后讨论了纳米药物载体在乳腺癌中的应用现状。
基金the financial support from Key Laboratory of Micro-systems and Micro-structures Manufacturing of Ministry of Education, Harbin Institute of Technology (2016KM007)
文摘Mesoporous silica has been widely explored for biomedical applications due to its unique structure and good biocompatibility. In particular it exhibits superior properties as micro/nano-carriers in the biomedical field. We explore their potentials in controlled drug/gene co-delivery and photodynamic therapy for cancer treatment both in vitro and in vivo. By incorporating mesoporous silica nanoparticles（MSNP） with two-dimensional nanomaterial, graphene oxide nano-sheet, we utilize MSNP in cellular bio-imaging with squaraine dye. Meanwhile, through delicate combination between mesoporous silica micro/nano carriers with catalytic/bio-catalytic reactions, we manage to achieve self-propelled micro/nano-motors based on mesoporous silica that are capable of transporting cargos in an active manner. Especially, enzyme powered mesoporous silica motors can be powered by physiologically available fuels such as glucose and urea,which are advantageous for future biomedical use. Motion control on both velocity and movement direction provides a powerful tool for targeted drug delivery. Therefore, such mesoporous silica based active carriers pave way to the solution of targeted drug delivery for cancer treatment in future nano-medicine field.
文摘Cancer refers to a collection of diseases that have abnormal cell growth as their hallmark.This inability of cytotoxic agents to distinguish between rapidly dividing healthy cells and rapidly multiplying cancerous cells produces the most notorious adverse effects of cytotoxic anticancer agents.As an essential tool in nanotechnology,nanoemulsions have therapeutic and clinical applications.Currently,nanoemulsions are considered to be one of the most feasible nano-carriers for delivering lipophilic antineoplastic agents with targeted delivery.In addition to solving water-solubilization issues,these formulations deliver specific targeting to cancer cells and might even be developed to overcome multi-drug resistance.Nanoemulsions overcome the problems associated with conventional drug delivery systems,such as low bioavailability and noncompliance.A review of nanoemulsion in cancer therapeutics is presented here to shed light on the current position of this technology.
