Photodynamic therapy(PDT)represents a promising method for treatment of cancerous tumors.The chemical and physical properties of used photosensitizer(PS)play key roles in the treat ment efficacy.In this study,a novel PS,5,10,15,20-tetrais((5-dipropylamino)pentyl)-chlorin(TDPC)which displayed a characteristic long wavelength absorption peak at 650 nm were synthesized.It also shows a singlet oxygen generation rate of 4.257 min^(-1).Generally,TDPC is localized in mitochondria and nucleus of cell.After light irradiation with 650 nm laser,it can kill many types of cell,in addition,TDPC-PDT can destroy ECA-109 tunor in nude mice and a necrotic scab was formed eventually.The expression levels of many genes which regulated cell growth and apoptosis were determined by RT-PCR following TDPC-PDT.The results showed that it either increased or decreased,among which,the expression level of TNFSF13,a member of tumor necrosis factor superfamily,increased signifcantly.In general,TDPC is an elective antitumor PS in vitro and in vito and is worthy of further study as a new drug candidate.TNFSF13 will be an important molecular target for the discovery of new PSs.
In this study,a novel photosensitizer mesc-tetra(3-prrolidinomethyl-4-methoxyphenyl)chlorin(TPMC)was reported.It displays a characteristic long wavelength absorption peak at 656 nm and it shows a singlet oxygen quantum yield of 0.48.After light iradiation with 650 nm laser,it can kill Eca-109 and SMMC-7721 cells in vitro(25 mW/cm^(2),1.2 to 3.6J/cm^(2))and destroy Eca-109 tumor in nude mice(50 mW/cm^(2),90J/cm^(2)).It has the perspective to be developed as a new anti-tumor drug in photodynamic therapy(PDT)photodiagnosis,and deserves further investigation.
