Objective:To identify differentially expressed saliva proteins of oral lichen planus(OLP)patients by two-dimensional fluo-rescence difference electrophoresis(2-D DIGE)and mass spectrometry(MS).Methods:3 pairs of saliva samples from OLP patients and matched healthy adults were collected.Saliva proteins were separated by 2-D DIGE and identified by liquid chromatography-mass spectrometry(LC-MS).Results:SDS-PAGE examination showed that the electrophoresis bands were clear and protein loss was rare. Protein dots were highly reproducible by 2-D DIGE.In average,the abundance of (31 7 ±71 )saliva protein spots were found in OLP pa-tients.4 highly reproducible spots were identified to be secretory IgA1 ,zincα-2-glycoprotein,salivary amylase and serum albumin by LC-MS and they were at higher level in OLP patients than those in the healthy controls.Conclusion:Secretory IgA1 ,zincα-2-glyco-protein,salivary amylase and serum albumin are highly expressed in the saliva of OLP patients,and may be related to the occurrence and development of oral lichen planus.

Objective : To develop an extracellular vesicles ( EVs) co⁃loading system by synergistically deliver tumor necrosis factor related apoptosis inducing ligand (TRAIL) /verteporfin (VPF) combination to induce apoptosis and inhibit proliferation of OSCC cells . Methods : TRAIL/VPF co⁃loaded EVs (MSCT⁃EVs/VPF) was purified and collected though ultracentrifugation and dialysis . The expression of CD63 , CD9 and TRAIL was detected by BCA to confirm the origin of EVs . High performance liquid chromatography (HPLC) was used to detect the drug loading of VPF and draw the release curve in vitro . Cytotoxicity and half inhibitory concentration (IC50 ) were detected by MTT assay . The apoptosis rate was detected by flow cytometry . Finally , Western blot was used to detect the effects of MSCT⁃EVs/VPF on the expression of apoptosis related proteins and Yap in SCC25 cells . Results: MSCT⁃EVs/VPF particles were round and well dispersed with a diameter of about 100 nm . The drug loading of the nano system was about ( 15 . 43 ± 0. 44)% , 57. 8% of VPF was released in 10 h and 82. 5% in 45h ; MSCT⁃EVs and VPF could inhibit the growth of SCC25 tumor cells in a dose⁃depe~ndent manner , showing good synergistic effect in the ratio of 10 : 1 - 5 : 1 ( CI < 1 , wt% ) . At the ratio of 100 : 5 100 : 15 ( Mass ratio of MSCT⁃EVs to VPF , wt% ) , the IC50 of MSCT⁃EVs/VPF was significantly lower than that of free MSCT⁃EVs + free VPF group (P < 0. 05) , and showed a more effective inhibition . The high inhibitory effect of MSCT⁃EVs/VPF on squamous cell car cinoma cells was partly due to the regulation of Caspase⁃3 , Bax , BCL⁃2 , mTOR , p ⁃mTOR and YAP . Conclusion EVs delivery of a fixed proportion of TRAIL/VPF shows high inhibitory effect on oral squamous cell carcinoma cells , which provides a new idea for the treatment of multidrug⁃resistant tumors .