Phototherapy,mainly induding photodynamic therapy(PDT)and photothermal therapy(PTT),is a noninvasive and effective approach for cancer treatment.Since integration of PDT and PTT for simultaneous synergistic PDT/PTT tr...Phototherapy,mainly induding photodynamic therapy(PDT)and photothermal therapy(PTT),is a noninvasive and effective approach for cancer treatment.Since integration of PDT and PTT for simultaneous synergistic PDT/PTT treatment enables us to improve phototherapeutic eficacy significantly,it has been attracting a lot of investigations in current days.Here,we introduce IR-52,a new mitochondria-targeting near infrared(NIR)fAuorescent small molecule,which possesses structure inherent PTT and PDT synergistic photother apeutic effects wit hout conjugation to specific ligands.After NIR light irradiation(808 nm,2 W/cm^(2),5min),both the hyperthermia and excessive singlet oaxygen levels were determined when dis-solving IR-52 in aqueous sohutions.In vitro photoinduced cytotoxicity studies showed signifcant lower cell viabilities and higher necrotic/apoptotic rates when cancer cells were treated with IR-52 and irradiation,and its'mitochondrial localization in cancer cells would partially explain its high cytotoxicity.Further in vivo synergetic PDT and PTT effects were demonstrated by high tumor surface temperature and sigmificant inhibition of tumor growth.Our results strongly suggest that IR-52,which possesses excellent photosensitivity,may provide a promising strategy for tumor treatment with decreased side effects.展开更多
Our research has identified a couple of near-infrared(NIR)heptamethine indocyanine dyes exhibiting preferential tumor accumnulation property for in vriwo imaging.On the basis of our foregoing work,we describe here a p...Our research has identified a couple of near-infrared(NIR)heptamethine indocyanine dyes exhibiting preferential tumor accumnulation property for in vriwo imaging.On the basis of our foregoing work,we describe here a preliminary structure-activity relationship(SAR)study of 11 related heptamethine indocyanine dyes and several essential requirements of these structures for in vivo tumor-targeted imaging.展开更多
The role of point-of-care(POC)diagnostics is important in public health.With the support of smartphones,POC diagnostic technologies can be greatly improved.This opportunity has arisen from not only the large number an...The role of point-of-care(POC)diagnostics is important in public health.With the support of smartphones,POC diagnostic technologies can be greatly improved.This opportunity has arisen from not only the large number and fast spread of cell-phones across the world but also their improved imaging/diagnostic functions.As a tool,the smartphone is regarded as part of a compact,portable,and low-cost system for real-time POC,even in areas with few resources.By combining near-infrared(NIR)imaging,measurement,and spectroscopy techniques,pathogens can be detected with high sensitivity.The whole process is rapid,accurate,and low-cost,and will set the future trend for POC diagnostics.In this review,the development of smartphone-based NIR fluorescent imaging technology was described,and the quality and potential of POC applications were discussed.展开更多
基金the National Natural Science Foundation of China(Grant No.81402784)University Innovation Team Building Program of Chongqing(CXTDG201602020).
文摘Phototherapy,mainly induding photodynamic therapy(PDT)and photothermal therapy(PTT),is a noninvasive and effective approach for cancer treatment.Since integration of PDT and PTT for simultaneous synergistic PDT/PTT treatment enables us to improve phototherapeutic eficacy significantly,it has been attracting a lot of investigations in current days.Here,we introduce IR-52,a new mitochondria-targeting near infrared(NIR)fAuorescent small molecule,which possesses structure inherent PTT and PDT synergistic photother apeutic effects wit hout conjugation to specific ligands.After NIR light irradiation(808 nm,2 W/cm^(2),5min),both the hyperthermia and excessive singlet oaxygen levels were determined when dis-solving IR-52 in aqueous sohutions.In vitro photoinduced cytotoxicity studies showed signifcant lower cell viabilities and higher necrotic/apoptotic rates when cancer cells were treated with IR-52 and irradiation,and its'mitochondrial localization in cancer cells would partially explain its high cytotoxicity.Further in vivo synergetic PDT and PTT effects were demonstrated by high tumor surface temperature and sigmificant inhibition of tumor growth.Our results strongly suggest that IR-52,which possesses excellent photosensitivity,may provide a promising strategy for tumor treatment with decreased side effects.
基金supported by State Key Basic Research Development Program(2012CB518103)Natural Science Foundation Programs(81072523 and 81130026)+1 种基金Chongqing Municipal Natural Sci-ence Foundation Program(CSTC2009BA5043)a program of New Century Excellent Talents in University(NCET)from Ministry of Education to C.S.
文摘Our research has identified a couple of near-infrared(NIR)heptamethine indocyanine dyes exhibiting preferential tumor accumnulation property for in vriwo imaging.On the basis of our foregoing work,we describe here a preliminary structure-activity relationship(SAR)study of 11 related heptamethine indocyanine dyes and several essential requirements of these structures for in vivo tumor-targeted imaging.
基金supported by the National Natural Science Foundation of China(No.81773352)the China Scholarship Council(No.201703170071)。
文摘The role of point-of-care(POC)diagnostics is important in public health.With the support of smartphones,POC diagnostic technologies can be greatly improved.This opportunity has arisen from not only the large number and fast spread of cell-phones across the world but also their improved imaging/diagnostic functions.As a tool,the smartphone is regarded as part of a compact,portable,and low-cost system for real-time POC,even in areas with few resources.By combining near-infrared(NIR)imaging,measurement,and spectroscopy techniques,pathogens can be detected with high sensitivity.The whole process is rapid,accurate,and low-cost,and will set the future trend for POC diagnostics.In this review,the development of smartphone-based NIR fluorescent imaging technology was described,and the quality and potential of POC applications were discussed.
