Objective To investigate the expression of Human leucocyte antigen(HLA)-DP,-DQ,-DR and CD40 in human retinal pigment epithelial(RPE)cells,to determine their molecule expression in immune response process,and their abilities to stimulate T lymphocyte activation. Methods Human RPE cells were cultured with or without(-IFN respectively.Expression of HLA-DP,-DQ,-DR and CD40 was measured by immunohistochemical staining.Meanwhile,peripheral blood mononuelear cells(PBMC)were co-cultured with RPE cells in vitro,and then the expression of activated lymphocytes CD69 was measured by fluorescence activated eell sorter(FACS). Results Expression of HLA-DP,-DQ,-DR and CD40 antigen were enhanced by γ-interferon inducement.Increasing amount of CD69 positive Iymphocytes were found in the co-culture system of RPE cells and PBMC. Conclusion T-lymphocytes in the peripheral blood were activated by human RPE cells which is antigen presenting cells with immunological characteristics potential.

Objective:To investigate the capability of corneal cells to stimulate lymphocyte proliferation and the expression of costimulatory molecules on primary human corneal epithelial cells.Methods:Human corneal epithelial cells were cocultivated with peripheral blood mononuclear cells(PBMC). Expression of HLA class Ⅱ antigens, CD40, CD154, CD80 and CD86 was measured by immunohistochemical staining,and the expression of such molecules above on rejected corneal grafts was contrastingly assessed. Activation of lymphocytes was determined by measuring upregulation of CD69 by FACS analysis.Results:HLAⅡ expression was detectable on human primary corneal epithelial cells,and furthermore, upregualtion of costimulatory molecules CD40 and CD80 were also found after induction with ?-interferon. Both of HLA and CD40 were expressed on rejected corneal grafts. T lymphocytes were activated by epithelial cells in the coculture system.Conclusion:Human corneal epithelial cells are involved in rejection process of the corneal transplantation. The immunological reaction is triggered by epithelial cells,and endothelial cells suffer as the targets.

Objective To construct the clone vector of S gene in occult hepatitis B virus infection.To analyse its mutations and to construct its prokaryotic expression vector.Methods To amplify the HBV S gene with polymerase chain reaction(PCR),recombinate the S gene and vector PUC18,sub-clone the recombination and construct its prokaryotic expression vector with pThiohis B. Results There were two samples negative with positive HBV DNA from 64 samples with negative hepatitis B surface antigen.The clone vector and prokaryotic fusion protein expression vector of an occult HBV infection′s S gene were successfully constructed.The S gene was not changed by sequencing analysis.Conclusion The fluorescence quantitive polymerase chain reaction (FQ-PCR) can examine low-copies in occult hepatitis B virus infection.Determining quantitivly HBV DNA of recombination can identify the recombination and display multiplication state intuitirely.It is very successful in constructing the clone vector and prokaryotic fusion protein expression vector.

Objective:To explore the role of hypoxia in C_2C_(12) cells proliferation.Methods:We chose 10% oxygen concentration.Cell numbers were counted with a hemacytometer.The proliferous indexes were observed with a flow cytometer.HIF-1? protein was determined by Western blot,mRNA expression was determined with reverse transcriptase-polymerase chain reaction(RT-PCR).Results:The cell numbers and proliferous indexes were higher(P

Humans ; Soft Tissue Neoplasms ; diagnosis

Carcinoma, Hepatocellular ; surgery ; Hepatectomy ; Humans ; Liver Neoplasms ; surgery

Musashi is a family of RNA binding proteins with a conservative evolution. This protein family is selectively ex-pressed in the nervous system and comprises two members, namely, Musashi-1 and Musashi-2. Musashi-1 and Musashi-2 are transla-tional suppressors of Numb mRNA and can synergistically regulate the Notch signaling pathway;as a result, an asymmetric division of stem cells occurs. Musashi-1 is the first member of the family and was originally isolated from Drosophila. As a candidate stem gene, Musashi-1 participates in disease progression in stem cells. Musashi-1 is also an important protein that maintains the functions of stem cells, participates in tumor-related signaling pathways, and participates in cell proliferation and apoptosis. Furthermore, Musashi-1 is overexpressed in many solid tumors, such as neuroglioma, esophagus, gastric, colorectal, and breast cancers. Studies on Musashi-1 can provide new insights into genetic diagnosis and cancer treatments. In this study, the structure and function of Musashi-1 and the re-search progress of tumor mechanisms were summarized and reviewed.

Objective To investigate the relationship between plasma level of homocysteine (Hcy) and amyotrophic lateral sclerosis (ALS).Methods The differences of Hcy,Vitamin B12,and folate levels between 150 outpatients with ALS and 137 age and sex matched controls were compared in a cross-sectional study.Results Compared with the healthy controls,patients with ALS had a higher plasma Hcy level [ ( 18.47 ± 13.09) μmol/L vs ( 11.91 ± 5.37 ) μmol/L,P ＜ 0.001 ] and a lower folate level [ ( 8.39 ±4.45) ng/ml vs (10.38 ±5.01) ng/ml,P ＜0.001].In a logistic regression model using ALS as a dependent variable,plasma level of Hcy was significantly associated with ALS.A trend for higher Hcy levels in patients with shorter interval from symptom onset to diagnosis ( ODI ) was also found [ Hcy levels (20.73 ± 15.79 ) μmol/L with ODI ＜ 19 months vs ( 16.41 ± 9.73 ) μmol/L with ODI ≥ 19 months,P =0.035 ].Conclusions Plasma Hcy level is significantly increased in patients with ALS.The individuals with shorter time to diagnosis present higher Hcy level,suggesting that it may associate with the progression pace of ALS.

Objective To study the clinical effect of cohesive elastic bandage (CEB) after operative treatment of ankle fractures. Methods After surgery, 60 patients with ankle fracture were randomly as-signed to 2 even groups: CEB dressing group and common dressing group. Functional exercise started the next day after operation. Comparison was made between the 2 groups in drainage, displacement and swelling. Results In CEB dressing group, the volume of drainage was (34.6±18.1) mL, the rate of displacement 6.7%, and the swelling was slight in 21 patients, moderate in 5 and severe in 4. In common dressing group, the volume of drainage was (85.1±17.1) mL, the rate of displacement was 63.3%, and the swelling was slight in 7 patients, moderate in 12 and severe in 11. The differences were significance(P<0.05) . Conclusion Use of CEB after surgery for ankle fractures may alleviate swelling, reduce bleeding effectively, and benefit early functional exercise.

Objective To investigate the diagnosis and treatment of renal angiomyolipoma with hemorrhage. Methods Eighteen cases of renal angiomyolipoma with hemorrhage were diagnosed by imaging such as ultrasound and CT from June 2000 to December 2007.Open operations were adopted in 15 cases. Expectant treatment was adopted in 3 cases. Results Hemorrhage stopped in 3 cases with expectant treatment.All the operations succeeded.Pathological diagnosis after operations was renal angiomyolipoma.The follow-up time was 3 to 60 months.Ultrasound,CT and intravenous pyelography were mainly methods.There was no case of relapse or fistula.Tumor size of 3 cases with expectant treatment changed little. Conclusions Diagnosis of renal angiomyolipoma with hemorrhage should be based on clinic and imaging.CT and ultrasound have better diagnosis effect.Expectant treatment,selective embolization of renal artery,tumor excision and heminephrectomy are main methods.Nephrectomy can also be adopted when there is serious hemorrhage.