In order to deliver and/or release anti-cancer therapeutics at the tumor sites, novel environment-responsive drug delivery systems are designed to specifically respond to tumor microenvironment （such as low pH and hy...In order to deliver and/or release anti-cancer therapeutics at the tumor sites, novel environment-responsive drug delivery systems are designed to specifically respond to tumor microenvironment （such as low pH and hypoxia）. Due to their extraordinary advantages, these environment-responsive drug delivery systems can improve antitumor efficacy, and most importantly, they can decrease toxicity associated with the anti-cancer therapeutics. This review highlights different mechanisms of environmentresponsive drug delivery systems and their applications for targeted cancer therapy.展开更多
Probiotics participate in various physiological activities and contribute to body health.However,their viability and bioefficacy are adversely affected by gastrointestinal harsh conditions,such as gastric acid,bile sa...Probiotics participate in various physiological activities and contribute to body health.However,their viability and bioefficacy are adversely affected by gastrointestinal harsh conditions,such as gastric acid,bile salts and various enzymes.Fortunately,encapsulation based on various nanomaterials shows tremendous potential to protect probiotics.In this review,we introduced some novel encapsulation technologies involving nanomaterials in view of predesigned stability and viability,selective adhesion,smart release and colonization,and efficacy exertion of encapsulated probiotics.Furthermore,the interactions between encapsulated probiotics and the gastrointestinal tract were summarized and analyzed,with highlighting the regulatory mechanisms of encapsulated probiotics on intestinal mechanical barrier,chemical barrier,biological barrier and immune barrier.This review would benefit the food and pharmaceutical industries in preparation and utilization of multifunctional encapsulated probiotics.展开更多
The microphases and miscibility in binary curcumin(Cur)solid dispersions(SDs)with amorphous polyvinylpyrrolidone K30(PVP K30)and semi-crystalline poloxamer(P407)and poly(ethylene glycol)6000(PEG6000)as carriers were i...The microphases and miscibility in binary curcumin(Cur)solid dispersions(SDs)with amorphous polyvinylpyrrolidone K30(PVP K30)and semi-crystalline poloxamer(P407)and poly(ethylene glycol)6000(PEG6000)as carriers were investigated by fluorescence contrasting utilizing confocal laser scanning microscopy.A super sensitive fluorophore P4 with typical aggregation-caused quenching properties was employed to stain the continuous polymer phases and contrasted with the autofluorescence of the model drug Cur.In addition,differential scanning calorimetry(DSC)and powder X-ray diffraction(PXRD)were utilized to assist in explanation of the fluorescence results.In all three SD systems,there is always a homogenous polymer phase stained by P4 and it is difficult to adulterate Cur crystals by P4.Cur-enriched rather than polymer-enriched domains could be detected.In the Cur-PVP K30 system,Cur exists in an amorphous form at a Cur loading level of 50%and below,while Cur crystallines phase out and continuously grow with the increase of Cur loading from 60%to 90%.The phase behaviors in the Cur-P407 and Cur-PEG 6000 systems are similar but with minor differences.In both systems,Cur phases out as clusters of drug-enriched domains at a loading level of 20%and below,which however cannot be correlated with crystallization,as evidenced by both DSC and PXRD.There is a transition from an amorphous to a crystalline state from 20%to 30%Cur loading,above which Cur crystallines can be detected.It is interesting that a co-mix phase of both Cur-and PEG 6000-enriched domains can be identified at Cur loading levels of 10%and less.Taking together,it is concluded that contrasting Cur autofluorescence with the signals of P4 proves to be a functional strategy to reveal multiple phases in the binary SD systems investigated.展开更多
Cancer immunotherapy has significantly flourished and revolutionized the limited conventional tumor therapies,on account of its good safety and long-term memory ability.Discouragingly,low patient response rates and po...Cancer immunotherapy has significantly flourished and revolutionized the limited conventional tumor therapies,on account of its good safety and long-term memory ability.Discouragingly,low patient response rates and potential immune-related side effects make it rather challenging to literally bring immunotherapy from bench to bedside.However,it has become evident that,although the immunosuppressive tumor microenvironment(TME)plays a pivotal role in facilitating tumor progression and metastasis,it also provides various potential targets for remodeling the immunosuppressive TME,which can consequently bolster the effectiveness of antitumor response and tumor suppression.Additionally,the particular characteristics of TME,in turn,can be exploited as avenues for designing diverse precise targeting nanomedicines.In general,it is of urgent necessity to deliver nanomedicines for remodeling the immunosuppressive TME,thus improving the therapeutic outcomes and clinical translation prospects of immunotherapy.Herein,we will illustrate several formation mechanisms of immunosuppressive TME.More importantly,a variety of strategies concerning remodeling immunosuppressive TME and strengthening patients'immune systems,will be reviewed.Ultimately,we will discuss the existing obstacles and future perspectives in the development of antitumor immunotherapy.Hopefully,the thriving bloom of immunotherapy will bring vibrancy to further exploration of comprehensive cancer treatment.展开更多
The discrimination against nutritional fat emulsion injections was considered by imaging tools,which aims to elucidate the in vivo behaviors of nanoemulsions.In this study,20%nutritional fat emulsion injections were s...The discrimination against nutritional fat emulsion injections was considered by imaging tools,which aims to elucidate the in vivo behaviors of nanoemulsions.In this study,20%nutritional fat emulsion injections were selected from different company including original and generic products.Meanwhile,a water quenching fluorescent probe(P2)was used to label them by an incubation method.The fluorescent intensity analysis of blood-borne fluorescence reveals rapid clearance of nanoemulsion in all groups,which shows'L'-type blood kinetic profiles.However,these kinetic parameters do not have significant difference.Following intravenous administration,the nanoemulsions in all groups concomitantly accumulated in organs of reticulo-endothelial system(RES),such as liver and spleen,and were cleared from body circulation mostly after 12 h.AUC(0-t)of organs from different groups showed dissimilar results in some organs.These intuitional results are of significance in understa nding the in vivo behaviors of nanoemulsions,which can provide a new way to discriminate against nutritional fat emulsions.展开更多
基金National Basic Research Program of China(Grant No.973 Program,2013CB932500)National Natural Science Foundation of China(Grant No.81273458)Specialized Research Fund for the Doctoral Program of Higher Education(Grant No.20110071130011)
文摘In order to deliver and/or release anti-cancer therapeutics at the tumor sites, novel environment-responsive drug delivery systems are designed to specifically respond to tumor microenvironment （such as low pH and hypoxia）. Due to their extraordinary advantages, these environment-responsive drug delivery systems can improve antitumor efficacy, and most importantly, they can decrease toxicity associated with the anti-cancer therapeutics. This review highlights different mechanisms of environmentresponsive drug delivery systems and their applications for targeted cancer therapy.
基金supported by the National Key Research and Development Program(2019YFC1606704)the Key Research and Development Program of Shaanxi Province(2022NY-013)+1 种基金National Natural Science Foundation of China(31801653)the Natural Science Foundation of Shaanxi Province(2019JQ-722).
文摘Probiotics participate in various physiological activities and contribute to body health.However,their viability and bioefficacy are adversely affected by gastrointestinal harsh conditions,such as gastric acid,bile salts and various enzymes.Fortunately,encapsulation based on various nanomaterials shows tremendous potential to protect probiotics.In this review,we introduced some novel encapsulation technologies involving nanomaterials in view of predesigned stability and viability,selective adhesion,smart release and colonization,and efficacy exertion of encapsulated probiotics.Furthermore,the interactions between encapsulated probiotics and the gastrointestinal tract were summarized and analyzed,with highlighting the regulatory mechanisms of encapsulated probiotics on intestinal mechanical barrier,chemical barrier,biological barrier and immune barrier.This review would benefit the food and pharmaceutical industries in preparation and utilization of multifunctional encapsulated probiotics.
基金supported by the Science and Technology Commission of Shanghai Municipality(No.21430760800).
文摘The microphases and miscibility in binary curcumin(Cur)solid dispersions(SDs)with amorphous polyvinylpyrrolidone K30(PVP K30)and semi-crystalline poloxamer(P407)and poly(ethylene glycol)6000(PEG6000)as carriers were investigated by fluorescence contrasting utilizing confocal laser scanning microscopy.A super sensitive fluorophore P4 with typical aggregation-caused quenching properties was employed to stain the continuous polymer phases and contrasted with the autofluorescence of the model drug Cur.In addition,differential scanning calorimetry(DSC)and powder X-ray diffraction(PXRD)were utilized to assist in explanation of the fluorescence results.In all three SD systems,there is always a homogenous polymer phase stained by P4 and it is difficult to adulterate Cur crystals by P4.Cur-enriched rather than polymer-enriched domains could be detected.In the Cur-PVP K30 system,Cur exists in an amorphous form at a Cur loading level of 50%and below,while Cur crystallines phase out and continuously grow with the increase of Cur loading from 60%to 90%.The phase behaviors in the Cur-P407 and Cur-PEG 6000 systems are similar but with minor differences.In both systems,Cur phases out as clusters of drug-enriched domains at a loading level of 20%and below,which however cannot be correlated with crystallization,as evidenced by both DSC and PXRD.There is a transition from an amorphous to a crystalline state from 20%to 30%Cur loading,above which Cur crystallines can be detected.It is interesting that a co-mix phase of both Cur-and PEG 6000-enriched domains can be identified at Cur loading levels of 10%and less.Taking together,it is concluded that contrasting Cur autofluorescence with the signals of P4 proves to be a functional strategy to reveal multiple phases in the binary SD systems investigated.
基金This study was supported by National Natural Science Foundation of China(82173762)111 Project(B18035,China)the Key Research and Development Program of Science and Technology Department of Sichuan Province(2022JDJQ0050,2022YFS0334).
文摘Cancer immunotherapy has significantly flourished and revolutionized the limited conventional tumor therapies,on account of its good safety and long-term memory ability.Discouragingly,low patient response rates and potential immune-related side effects make it rather challenging to literally bring immunotherapy from bench to bedside.However,it has become evident that,although the immunosuppressive tumor microenvironment(TME)plays a pivotal role in facilitating tumor progression and metastasis,it also provides various potential targets for remodeling the immunosuppressive TME,which can consequently bolster the effectiveness of antitumor response and tumor suppression.Additionally,the particular characteristics of TME,in turn,can be exploited as avenues for designing diverse precise targeting nanomedicines.In general,it is of urgent necessity to deliver nanomedicines for remodeling the immunosuppressive TME,thus improving the therapeutic outcomes and clinical translation prospects of immunotherapy.Herein,we will illustrate several formation mechanisms of immunosuppressive TME.More importantly,a variety of strategies concerning remodeling immunosuppressive TME and strengthening patients'immune systems,will be reviewed.Ultimately,we will discuss the existing obstacles and future perspectives in the development of antitumor immunotherapy.Hopefully,the thriving bloom of immunotherapy will bring vibrancy to further exploration of comprehensive cancer treatment.
基金financially supported by the National Natural Science Foundation of China(Nos.81872826,81573363,81690263)Science and Technology Commission of Shanghai Municipality(No.18ZR1404100)Shanghai Pujiang Program(No.18PJD001)。
文摘The discrimination against nutritional fat emulsion injections was considered by imaging tools,which aims to elucidate the in vivo behaviors of nanoemulsions.In this study,20%nutritional fat emulsion injections were selected from different company including original and generic products.Meanwhile,a water quenching fluorescent probe(P2)was used to label them by an incubation method.The fluorescent intensity analysis of blood-borne fluorescence reveals rapid clearance of nanoemulsion in all groups,which shows'L'-type blood kinetic profiles.However,these kinetic parameters do not have significant difference.Following intravenous administration,the nanoemulsions in all groups concomitantly accumulated in organs of reticulo-endothelial system(RES),such as liver and spleen,and were cleared from body circulation mostly after 12 h.AUC(0-t)of organs from different groups showed dissimilar results in some organs.These intuitional results are of significance in understa nding the in vivo behaviors of nanoemulsions,which can provide a new way to discriminate against nutritional fat emulsions.
