Objective To observe the variations of the functional states of T helper cells(Th) in peripheral blood of children with mycoplasma pneumoniae pneumonia(MPP) in acute phase,and to explore their roles in the pathogenesis of MPP.Methods Peripheral blood mononuclear cells(PBMC) of 40 MPP children were stimulated with PMA and ionomycin and cultured in vitro for 48 hours.The levels of IL-4,IFN-?,and TGF-?1 in the supernatants of PBMC were detected by ELISA.Results The levels of IFN-? and the ratio of IFN-?/IL-4 of MPP children in acute phase were significantly lower than those of the controls(P0.05).Conclusions The function of Th2 relatively prevails over Th1 in MPP children.The protective or regulative function of Th3 in vivo increases,but the protective regulation of TGF-?1 is insufficient,so the imbalance of Th1/Th2 can not be corrected.The variation of the functional states of T helper cells in acute phase has no relationship with or without the extrapulmonary damage.

After-department examination palys an important role in clinical teaching.The level of clinical teaching is one of the most important markers to evaluate the whole quality of the hospital.To improve the ability of teaching and teaching concept,we summarized the problem of after-department examination and put forward a series of reformation methods.

Objective To investigate the efficacy of monotherapy or combination of ACEI and ARB in treating diabetic nephropathy(DN). Methods 183 patients with DN were randomly allocated into three treatment groups: benazepril,losartan or the combination of these two drugs for 12 weeks.The changes of blood pressure, proteinuria, serum potassium and creatinine, creatinine clearance(Ccr)were observed before and after treatment. Results Both of benazepril and losartan reduced blood pressure and proteinuria efficiently.And their effects were similar.In contrast, the reduction in proteinuria was greater in the combination therapy than in treatments of either drug alone(P<0.05), but their reductions in blood pressure were achieved to the same level(P>0.05).There were not significant differences in serum levels of potassium, creatinine and Ccr before and after treatment(P>0.05). Conclusion A combination of ACEI and ARB in patients with DN produces a better anti-proteinuric effect than either of the monotherapies.This protection is not dependent on changes in blood pressure.

The response of murine lymphoreticular tissue with Special reference to regional lymph node after implantation of Ehrlich ascites carcinoma cells was investigated histologically and ultrastructurally. The tumor induced a vigorous histological response in both regional and nonregional lymph nodes that was proliferation of immunoblasts with enlargement of paracortical area in early stage and enlargement, fusion of germinal centers with an increased number of plasma cells in the medullary cords during the late stage of tumor growth.The results suggested that the response of lymph nodes might be mainly related to cell-mediated immune mechanism in the early stage and humoral immunity during the late stage of tumor growth. Regional lymph node gave reaction earlier and more vigorously in participating cell-mediated immunity, nonregional lymph node might be more significantly involved in humoral immunity. It was observed ultrastructurally that sinus histiocyte engulfed tumor cell in which the cooperation with lymphocyte might be necessary. The experimental results indicated that the increased number of immunoblast in paracortex may be considered as an indicator for antitumor cellmediated immunity with an important prognostic significance for host bearing tumor.

Objective To investigate the clinical characteristics of colorectal cancer and its trend in Guangdong province.Methods The data from 6501 patients with pathologically confirmed colorectal cancer of 5 hospitals from 1990 to 2004 was analyzed.Results The mean age of 6501 patients with colo- rectal cancer was 59 years old,with the predominant age ranged from 61 to 70 years old.The proportion of young patients decreased from 7.1% to 3.5%.and the ratio between male and female was 1.47:1, which was gradually increased with increasing of age.The prevelence reached a high peak(60 years old) and dropped after that as a single peak curve.The ratio between rectal cancer and colon cancer was 1.1: 1,and the descending colon cancer accounted for 27.6%.With ageing,the rectal cancers decreased while the right hemi colon cancer increased gradually.Tubular adenocarinoma was predominant with his- tological typing,which accounted for 76.0%.The progressing stage(Dukes B,C,and D)was found in 93.9% of all cases.Conclusions The onset age of patients with colorectal cancer become close to west- ern country.The proportion of young patients are decreasing.The ratio between male and female dis- plays a single peak curve from rising to dropping.A tendency of decreasing percentage in rectal cancer and the gradual increasing in right hemi colon cancer emphasize the importance of colonoscopy in colorec- tal caner screening.

s Objective: To investigate the comorbidity of depression and anxiety in primary school students. Methods:565 pupils ranged from 2 to 6 grade in a primary school were tested by The Screen for Child Anxiety Related Emotional Disorders (SCARED) and Depression Self-Rating Scale for Children (DSRSC). Results: There were 140 pupils with a total score higher than cut-off point of SCARED; 97 pupils with a total score higher than cut-off point of DSRSC; 43 pupils with total scores higher than cut-off point of both SCARED and DSRSC, and the positive rate of comorbidity of anxiety and depression was 7.61%. 30.71 percent of children with anxiety disorder was considered co-morbiding depression; 44.33 percent of children with depressive disorder was considered comorbiding anxiety. Chil-dren with comorbidities had higher scores in Withdrawn(mean rank 297.7 ) than Anxiety group(220.8) and Depressive group(202.2);Somatic Complaints(268.2)than Anxiety group (232.2 ) and Depressive group(206.2 ) , Anxious/Depressed (277.2 )than Anxiety group (227.7 ) and Depressive group(219.2 )of CBCL(?~2 =16.72～22.71,P

Objective　To investigate the importance of CT diagnosis and differential diagnosis in Wilms′ tumors of children.Methods　45 cases of Wilms′ tumors confirmed by clinical and pathology were retrospectively analyzed,CT characteristics of Wilms′ tumor,renal carcinoma(2 cases),renal rhabdomyosarcoma(1 case)in children were discussed.Results　Wilms' tumors appeared in solid masses in 34 cases (76%),cysticsolid masses in 9 cases(20%),cystic masses in 2 cases (4%),7 cases (15.6%)had thrombosis in renal vein or IVC.Renal carcinoma shared the same appearance with Wilms′ tumor in image.Rhabdoid tumor of kidney appeard as cystic-solid mass with lineal calcification and subcapsular fluid accumulation.Conclusion　Wilms′ tumor is the most popular malignant renal tumors in children.It is originate from renal parenchyma,and likely to invade renal pelvis.Hemorrhhage,necrosis or cystic formation in tumor is common.They are difficult to be distinguished from renal cell carcinomas in radiology.Rhabdoid tumor of kidney is rare and has characteristic features on CT.

Objective To develop the state-owned enterprise worker's stressor scale and assess its reliability and validity.Methods Combined qualitative and quantitive methods,the state-owned enterprise worker's stressor scale was developed based deep interviews.Data were collected from 6400 state-owned enterprise workers in China.The initial sample was split randomly into two samples (n 1 =2835 ; n 2 =2834).The first data were used to set for exploratory factor analysis (EFA) and the second data were used for confirmatory factor analysis (CFA).3 subscales (anxiety,depression and somatization) of symptom checklist 90(SCL-90) were used for testing criterion validity.Results The state-owned enterprise worker's stressor scale got 4 factors and 15 items,including job stressor,relationship stressor,development stressor and family stressor.The Cronbach α coefficients of the full scale and its four factors were 0.66 ～ 0.86.The results of CFA showed RMSEA =0.066,NFI =0.97,NNFI =0.97,CFI =0.97,IFI =0.97,GFI =0.95.In addition,stressor and its four factors had significant positive correlations with anxiety,depression and somatization (r =0.29-0.43,P ＜ 0.01).Conclusion The stateowned enterprise worker's stressor scale meets psychometric criteria and is an effective tool.

Objective To investigate the variation and correlation between tumor necrosis factor-?(TNF-?)and transforming growth factor-?1(TGF-?1)in children with Henoch-Schonlein purpura nephritis(HSPN)in plasma and explore their effects on kidney lesion in children with Henoch-Schonlein purpura(HSP).Methods Plasma TNF-? and TGF-?1 were determined with enzyme-linked immunosorbent assay(ELISA)in 30 cases with HSP,38 cases with HSPN and 30 normal controls,urinary protein excretion with urinary analyze method in these children.Renal biopsies were performed and renal biopsy specimens were observed by light,immunofluorescence and electron microscopy in 32 out of 38 cases with HSPN.The SPSS 11.0 software was used to analyze the data.Results 1.Comparing with normal controls,the plasma level of TNF-? and TGF-?1 in children with HSP increased with significant difference in statistics(Pa

The ultimate goal of post-genome research is to understand a complete set of proteins in a living organism for their expression pattern and biological function,which is called proteomics.One of the major challenges in proteome research is to study the protein-protein interactions,and the emerging bioinformatics approaches present us tremendous advantages when dealing with protein interaction networking and data analysis.Useful bioinformatics tools include protein-protein interaction network mapping,topology of the network,structure of the module and comparison of the network.The technology advancement in this field brings further understandings to the structure and function of cells at the proteome level,which may eventually lead to the discovery of new drug targets and design methods.This paper attempts to review the current researches on protein-protein interaction with an emphasis on bioinformatics intervention,and also summarizes some widely used methods for network analysis.