Objective To analyze the influences of lacrimal secretion and tear film after interferon-alpha therapy in patients with chronic viral hepatitis.Methods Sixty patients with chronic viral hepatitis who would accept the interferon-alpha therapy,including 30 cases of hepatitis B and 30 chronic viral hepatitis C,visited our department of ophthalmology and were enrolled in this study.All cases received eye examination,including medical history,slit lamp examination,corneal fluorescein staining ( FL) ,tear film break-up time ( BUT) and schirmer test before inter-feron-alpha therapy and two months after the therapy.Results In the 60 cases of chronic viral hepatitis,there were 19 dry eye cases (31.67%) and 41 non-dry eye cases (68.33%).In dry eyes group,9 of them (47.37%) were hepatitis B patients and 10 of them were hepatitis C patients (52.63%) .There was significant difference in FL grade (t=-5.288,P<0.05),BUT (t=5.799,P<0.05),Schirmer Ⅰ(t=5.319,P<0.05) test in hepatitis B before and two months after interferon-alpha therapy.Statistical significance had been found before and two months after therapy in FL grade (t=-9.103,P<0.05),BUT (t=5.682,P<0.05),SchirmerⅠtest (t=4.592,P<0.05). The incidence of dry eye syndrome in hepatitis B patients increased from 26.70%to 53.30%two months after treated with interferon-alpha,while the incidence of dry eye syndrome in hepatitis C patients increased from 33.30% to 60.00% two months after treated with interferon-alpha.Conclusion Dry eye syndrome is one of common complica-tions in patients with chronic viral hepatitis.Interferon-alpha therapy would influence the lacrimal secretion and dam-age tear film,which increased the dry symptoms in patients.We should pay attention to the side effects of interferon-alpha therapy.

Objective To evaluate the 1.5 T magnetic resonance imaging system to depict and track in vivo of magnetically labeled endothelial progenitor cells(EPCs),and to study the possibility for preventing the atherosclerotic plaque formation in New Zealand rabbit model of carotid arterial injury after transplantation.Methods New Zealand rabbit EPCs were isolated,confirmed,expanded and then incubated with home synthesized Fe_2O_3-PLL,Prussian blue stain was performed for showing intracellular irons.The model of carotid arterial injury was performed by 2.5F balloons,the group A of 8 rabbits received magnetically labeled EPCs,group B of 3 rabbits received fluorescent-labeled EPCs and the group C of 5 rabbits were given same volume saline injection after endothelial injury of the carotid artery.MR imaging and histology were performed and compared 4 days later for randomly chosen three rabbit,each from one of the three group;all the other rabbits were fed with high lipid diet and examed using MR imaging and histology after 15 weeks.Results Epcs labeling efficiency was more than 95% by Prussian blue stain, 4 days after transplantation of EPCs,only in group A,the injured endothelium of carotid artery had signal intensity loss in T_2 * WI,which were correlated well with the area where the most Prussian blue staining positive cells were found in histopathology analyses.The rabbits of group A and B which received EPCs transplantation exhibited fewer plaques formation than those of the group C(P

Objective To explore the influence of home synthesize magnetic iron oxide (called Fe2O3-PLL) labeling on peripheral blood endothelial progenitor cells (EPCs) bionomics to provide experimental foundation for MR imaging ex and in vivo. Methods Fe2O3 was incubated with PLL for 2 hours to obtain a complex of Fe2O3-PLL. Rabbit peripheral blood mononuclear cells were isolated and EPCs were selected by adherence method. Fe2O3-PLL was used to label EPCs. Prussian blue stain and electron microscope was used for showing intracellular iron. MTT assay was assessed to evaluate the difference of growth curve between unlabeled and labeled with 25 mg/L Fe2O3-PLL. Flow cytometry was performed to analyze cell cycle, cell apoptosis and the expression of surface markers of labeled and unlabeled cells. Expressions of Enos, KDR and Vwf at Mrna levels among unlabeled and labeled EPCs were detected by real-time polymerase chain reaction. Calcium ion channel and membrane fluidity were observed and analyzed by laser confocal microscopy. Statistical analyses were used with ANOVA and t test. Results Almost 100% cells were labeled by Fe2O3-PLL, iron-containing vesicles were intracytoplasma. There was no statistical difference in cells growth curve, cell life cycle [(93.74±3.52)% ,(94.57±3.66)% ] and cell apoptosis rate(12. 89±1.81) %, (11.67±1.18) %) between labeling with Fe2O3-PLL at a concentration of 25 mg/L and unlabeled cells (t = 0. 283, P > O. 05 ; t = 0. 977, P > 0. 05). There was also no statistical difference in relative amount of Enos, KDR and Vwf at Mrna levels and the expression of sudace phenotypic markers (CD34, CD106, CD146 and KDR) between two groups (P > 0. 05). In addition,Labeling had little influence on calcium ion channel and didn't significantly alter cell membrane fluidity.Conclusions The rabbit peripberal blood EPCs can be effective labeled with Fe2O3-PLL and without significant influence on cells bionomics at a low concentration of 25 mg/L. Almost every cell can be labeled and the labeled cells can be used further.

Objective To stuay the serum levels of sCD40L,hsCRP,ICAM-1 and VCAM-1,and the expression of CD40L of the CD4+T cells in patients withacute coronary syndrome(ACS),and to explore the relationship between CD40L and inflammatory factors and the effects of CD40/CD40L on ACS.Method Thirty-two coronary heart disease patients without history of other discernible systemic disease and medicine of steroids or immunosuppressants taken were divided into acute myocardial infarction group(AMI,n=11),unstable angina pectoris group(USP,n=14)and stable angina pectoris group(SAP,n=7).The control group was composed of eight healthy volunteers(CON group).Theexpression of CD40L Was determined by flow cytometry(FCM).Serum sCD40L.ICAM-1 and VCAM-1 were determined by using ELISA.The serum hsCRP was assayed by using immunoturbidimetry.Data were analyzed with SPSS 11.0 software for windows.Results The expression percentage(%)of CD40L of the CD4+T cells,and the serum levels of sCD40L,hsCRP,ICAM-1 and VCAM-1were sifnificantly higher in patients of AMI group than those in patients of other groups(P＜0.05 or P＜0.01).Similarly,those biomarkers in patients of UAP group were usually higher than those in patients of CON or SAP groups(P＜0.05).There Was a positive correlation between the expression of CD40L and the serum level of VCAM-1 in paients of AMI group(P＜0.05),and likewise,a positive correlation also existed between the serum level of sCD40L and other factors,hsCRP,ICAM-1 as well as VCAM-1,in patients of AMI group(P＜0.05).Conclusions The enhanced expression of CD40L of the CD4+T cells and high serum level of sCD40L are present in patients with acute coronary syndrome.The hsCRP,ICAM-1 and VCAM-1 play roles in the pathogenesis of ACS,and they have correlation with enhanced expression of CD40L and high serum level of sCD40L.Therefore,CD40L and sCD40L may be used as indicators of risk in coronary heart disease.

Objective To track the migration and incorporation of intravenously injected, magneti?cally labeled endothelial progenitor cells ( EPCs) from mouse bone marrow into the blood vessels in a rapid?ly growing HCC model by microMR (7.0 T). Methods This study was approved by the Institutional Com?mittee on Animal Research. H22 hepatic ascitic cancer cells was directly injected into the left liver lobe of BALB/c nude mice ( n=15) . EPCs derived from bone marrow of C57BL/6 mice were isolated and cultured. The third passage EPCs were collected and labeled with 25 μg/ml superparamagnetic iron oxide ( SPIO) and poly?l?lysine (PLL) complex (SPIO?PLL). MTT assay and flow cytometry were used to evaluate the difference of growth curve and apoptosis between labeled and unlabeled EPCs. EPCs labeled with SPIO?PLL were injected into mice via tail vein in experiment group (on the 3rd day after establishing HCC model) (n=15) and control group (n=6). The signal changes of tumor (the 1st, 3rd and 7th day after transplantation) were observed by microMR. Prussian blue staining and immunohistochemistry staining of CD31 were per?formed. MRI findings were confirmed by histomorphology. Two?sample t test was used to analyze the data. Results Single tumor was showed in the liver of all mice 3 d after establishing models. Labeling with SPIO?PLL at a concentration of 25μg/ml did not alter cell growth curve ( measured by MTT assay;t=0.281, P>0.05) and cell apoptosis (analyzed by flow cytometry). The apoptosis rates of SPIO?PLL labeled and un?labled EPCs were (12.31±1.43)% and (11.57±1.24)% in early stage, and (0.55±0.07)% and (0.49± 0?05)% in late stage. No significant differences were observed between them (t=0.967, 1.060; both P>0?05) . Migration and incorporation of transplanted and labeled cells into tumor were documented with in vivo microMR as low signal intensity at the tumor periphery as early as the 3rd day after EPCs administration in preformed tumors (4/5). Prussian blue staining showed iron?positive cells at the sites corresponding to low signal intensity on MRI. The positive cells expressing CD31 existed in intratumoral and peritumoral vessels. There was no signal change in control group at all time points. Conclusions MRI can demonstrate the in?corporation of magnetic labeled mouse EPCs into the implanted hepatoma. It may be helpful for early diagno?sis and therapy of liver tumor.

Objective To investigate the value of MR on diagnosis of intracranial primary lymphoma in immunocompetent patients.Methods The MR features of 28 cases with pathology proved intracranial primary lymphoma were analyzed retrospectively.Conventional MRI scans,enhanced MRI scan were observed.Immunohistochemical staining were done and the results were compared with the MR imaging signs. Results Twenty-eight cases were all B-cell type Non-Hodgkin's lymphoma,16 cases were single lesion (57%)and 12 cases were multiple lesions (43%).The tumors mainly located in the deep white matter,7 cases in callus corpus and grew crossing the midline supratentorial.The lesions presented mass or node (20/28),11 cases showed massive edema.On T1WI,lesions were mostly hypo-or iso-intense to gray matter.On T2WI,tumors showed iso-or hyper-intense.All lesions presented hyper-or iso-to hyper-intense on diffusion weighted imaging(DWI).Most lesions show marked mass-like or nodular-like contrast enhancement on MR imaging,8 cases presented"incision sign",5 cases showed"fist sign"and 7 cases showed"butterfly-like".Immunohistochemical staining showed that GFAP(-) was 78.6% (22/28),as well as CD20 (+)96.4% (27/28),CD79α(+)67.9% (19/28),CD10(+)10.7% (3/28),Bcl-6 (+)75% (21/28),Mum1 (+)89.3% (25/28).Ki-67 was greater than or equal to 50% (22/28).Among the 28 patients,25 cases (89.3%) showed an"activated non-germinal center B-cell(non-GCB)"in origin and 3 cases(10.7%)were considered as a"GCB"subset.Conclusion The imaging features of marked mass-kike or nodular-like on MRI enhancement scan and hyper-or iso-to hyper-intense on DWI are helpful in the diagnosis and the differential diagnosis of intracranial primary lymphoma.