Objective :To study the effects of intercellular adhesion molecule-1 (ICAM-1) and human leukocyte antigen (HAL-DR) on the immunopathologic process of uveitis. Methods:Imn- munohistochemical techniques were applied to detect their expression in eyes of both the health (20 cases from eye bank) and patients with uveitis (54 cases with 54 eyes which included 33 ex- ogenous uveitis and 21 endogenous one). Results:Both the two ant igens were detectable in the choroidal and retinal tissues in eyes of uveitis while all the normal eyes showed negative expres- sion of ICAM-1 and negative or little expression of HLA-DR (P＜0. 01). However,there was no statistically significant difference between exogenous and endogenous types (P＞0. 05). Conclu- sion: Both ICAM-1 and HLA-DR may be responsible for cell recognition and binding in the in- flarnmatory tissues. The co-expression of ICAM-1 and HAL-DR showed that these two factors might play an important role in the immunologic damage of the choroid and retina in uveitis.

Objective Through pathological and histological examination on retina to research the dosage relevance of trace PFD with toxicity in rabbit retina,and provide experimental reference basis for clinical practice.Methods Fourty eight eyes from 24 experimental rabbits were randomly divided into experimental group(36 eyes) and control group(12 eyes).The experimental one was divided into 3 groups,12 eyes in each group.The surface of rabbit retina was directly injected with 30,50,and 100 ?L liquids of PFD and BSS.The conditions of rabbit retina were observed under ophthalmoscope every day after the liquid injection.The sections of retina tissue were observed under transmission electron microscope in each experimental and control groups at the 4th,7th,14th and 21th day after injection.Results All samples were normal by ophthalmoscope examination while no pathological change of retina was found at various time points .At the 4th day,none substantial damage had been made in any dosage groups by transmission electron microscope examination except for 100 ?L group.Only one retina of 100 ?L group showed that the space around cell nucleus broadened appreciably,slightly atactic nucleus and slightly compact cytoplasm.It showed some early changes.From the 7th day,similar pathological changes were found: damage on outer segments of light receptor and outer plexiform layer,properties changes of light receptor,forming of vesicles of inner nuclear cells,damage of ganglion cell,dying of inside retina,actions of gulping cells in retina,swallow of film plates by pigment epithelial cell of retina,and dropping of top fine hair. But the retina of control group had no pathological changes.Conclusion Trace PFD exists in eyes.There is no relevance between poisonous development of retina and remaining dosage of PFD.However,large remaining of PFD can lead to retina toxicity early.

Objective: To evaluate the anti-tumor activity of mouse multi-subtype heat shock protein/peptide (mHSP/P) vaccine in combination with a programmed death ligand 1 (PD-L1) inhibitor in mouse sarcoma. Methods: Immunohistochemical staining and en-zyme-linked immunosorbent assay (Elisa) was used to quantitatively identify the expression of heat shock proteins (HSP70, HSP90, Grp94) in the sarcoma cell line MCA207. From the protein suspension prepared, mHSP/P and Grp94/peptide (Grp94/P) sarcoma vac-cines were isolated using chromatography and were identified by Western blot (WB). Flow cytometry was used to determine their cy-totoxic effects. The levels of interferon-γ (IFN-γ) and tumor necrosis factor-α (TNF-α) produced upon mHSP/P and Grp94/P stimulation were measured by Elisa. The effect of sarcoma vaccines on the growth and survival of sarcoma was evaluated in mice. The expression of PD-L1 on the surface of MCA207 sarcoma cells was evaluated by immunofluorescent staining. The effect of IFN-γ treatment on the expression of PD-L1 was determined by WB. Animal experiments explored the effects of PD-L1 inhibitor in combination with mHSP/P treatment on tumors. Results: Tumor tissue carries a variety of HSP subtypes (HSP70, HSP90, Grp94). We successfully isolated sarco-ma tissue-derived mHSP/P and Grp94/P tumor vaccines, which were identified by WB; flow cytometry analysis demonstrated their cy-totoxicity. The levels of IFN-γ and TNF-α cytokines upon mHSP/P stimulation were significantly higher than that observed upon Grp94/P stimulation (P<0.05). The expression of PD-L1 on the surface of sarcoma cells increased with IFN-γ treatment. Animal experiments demonstrated that PD-L1 inhibitor in combination with mHSP/P significantly increased the immune response against tumor (P<0.05). Conclusions: Tumor-derived mHSP/P and Grp94/P can be used as tumor vaccines in animal models. The mHSP/P can elicit a stronger anti-tumor immune response than Grp94/P. IFN-γ stimulates the expression of PD-L1 in sarcoma cells, which results in immune eva-sion. The PD-L1 inhibitor in combination with mHSP/P increased the anti-tumor effect in the tumor microenvironment.