Epstein-Barr virus is a kind of herpes virus that has oncogenic potential and is related to the tumorgenesis process of various malignancy. Important advances have been obtained on the study of the structure and functions of Epstein-Barr virus(EBV) latent membrane protein 1(LMP1) and signal transduction pathways mediated by LMP1 in recent years. LMP1 could regulate cellular growth, proliferation, transformation, differentiation, transference and apoptosis by means of signal transduction pathways such as NF-?B, AP-1, JAK/STAT, Ets1, MAPK/ATF2 and cyclin dependent kinase.

Researches have indicated that matrix metalloproteinases (MMP) and vascular endothelial growth factors (VEGF) play a key role in the metastasis of nasopharynx carcinoma (NPC). They promote tumor cell infiltration and metastasis by proteolysis of extracellular matrix proteolysis of tumor cells and induction of angiogenesis and lymphangioenesis. Researches on the mechanism of MMPs and VEGFs on NPC may help to further understand the metastasis of NPC and develop new methods for the diagnosis and treatment of NPC and other tumors as well.

Objective To study the cell metabolism changes of hippocampal region in patients with vascular dementia (VD) after stroke by 1 H-magnetic resonance spectroscopy (1 H-MRS),and to observe the relationship between cell metabolism changes and clinical symptoms after donepezil hydrochloride treatment.Methods Enrolled 18 patients with VD after stroke,16 males and 2 females,with a mean age of (76.9±2.7) years,13 patients without VD after stroke,11 males and 2 females,with a mean age of (76.2±3.6) years and 14 health volunteers as control group,12 males and 2 females,with a mean age of (75.1+2.4) years.The mini-mental state examination (MMSE),activities of daily living (ADL) and Hamilton depression scale (HAMD) were used to assess the effects on cognitive function,ability of daily living and behavior symptoms.1 H-MRS examination of bilateral hippocampus was conducted in all subjects.Metabolisms of N-acetylaspartate (NAA),choline (Cho) and creatine (Cr) were examined and the ratios of NAA/Cr and Cho/Cr were calculated.The patients with VD were prescribed donepezil and given 1 H-MRS assessment half a year later.Results The patients with VD had a significantly lower NAA/Cr ratio in bilateral temporal hippocampus area than did health controls and the patients without VD (F=4.23,4.98,both P＜0.05),and a higher Cho/Cr ratio than did health controls and the patients without VD in left hippocampus (P＜0.05).The NAA/Cr and Cho/Cr ratios in patients without VD had no significant changes compared to health controls.There was a positive relationship between MMSE score and NAA/Cr ratio,and negative relationship between MMSE score and Cho/Cr ratio in the bilateral hippocampus area in patients with VD.After 6 months of treatment of donepezil hydrochloride,the MMSE and ADL scales significantly increased (both P＜0.05),and NAA/Cr ratio had no significant change in hippocampal region (t=-2.02,-2.04,both P＞0.05),whereas Cho/Cr had significant decrease (t=2.86,2.23,both P＜0.05).Conclusions The data suggest that the lower NAA/Cr ratio and higher Cho/Cr ratio in hippocampus area might be helpful in distinguishing VD and no-VD in patients with stroke.Donepezil improves general cognition function in patients with VD,which may be associated with regulating the cholinergic pathogenesis of VD in vivo and in vitro.

Objective To study the diagnostic value of AFP,AFU and the combined detection of AFU and AFP in PHC.Methods To analyse the detection results of AFP,AFU and AFP and AFU from 80 PHC patients and 40 healthy controls by ROC curve.Results AFP and AFU were significantly different between them (P

As one of the "three key virtues" of Confucianism,wisdom played a significant role in the thousands of years of traditional Chinese culture.The nature of medical skills is humanity.However,as the great development of medical technology in modern society,tension and conflicts also arise in the current physician-patient relationship.Under this circumstance,this paper explores the origin of Confucian wisdom and its connection with modern physician-patient relationship,and comes up with suggestions for constructing a modern harmonious physician-patient relationship.

A brief description of performance appraisal as used in the healthcare sector, and an analysis of problems existing in performance appraisal for posts in community heahhcare organizations in the country. The paper proposes a job-analysis based performance appraisal for such posts, featuring the appraisal model of "performance + skills + attitude+ work intensity". On the basis of work analysis, a job description should be worked out for such healthcare workers as doctors, nurses and prevention workers in community healthcare organizations, aided by a targeted job-based performance appraisal system. These efforts can effectively enhance the job performance in such organizations, catering to the healthcare needs of community residents.

Objective To evaluate the value of automatic bacteria identification systems including Phoenix and Vitek2 Compact, as well as blaOXA-51-like gene amplification in the identification of Acinetobacter species compared with amplified ribosomal DNA restriction analysis(ARDRA). Methods A total of 50 non-repeated clinical isolates of Acinetobacter species were collected in PUMCH from 2006 to 2007 and identified by ARDRA, blaOXA-51-like gene amplification, Phoenix and Vitek2 Compact,respectively. Results Compared with ARDRA, the sensitivity and specificity of blaOXA-51-like gene amplification were both 100%. The accuracy rates of Phoenix and Vitek2 Compact were 44% and 56%, respectively. Conclusions The accuracy of phenotypic identification of Acinetobacter species is not ideal, however, blOXA-51-like gene amplification could be used as a fast and reliable method for identification of A. baumannii. ARDRA is recommended in the study of drug resistant mechanisms and homological analysis of Acinetobacter species.

Background and purpose:The development of nasopharyngeal carcinoma in rat and transformation of embryo nasophryngeal epithelia induced by N,N'-dinitrosopiperazine (DNP) were interfered by Yiqijiedu formular medicine via inhibiting telomerase. We investigated the impact of Yiqijiedu formula on precancerous lesion of nasal and nasopharyngeal epithelia in TgN (p53mt-LMP1) / HT mice induced by DNP and on its expression level of c-jun and p16 genes. Methods:The fourth generation TgN (p53mt-LMP1) / HT mice aged 5 months were randomly divided into 2 groups:(1)TgN(p53mt-LMP1)/HT cancerous lesion-inducing group (group A) was treated by normal saline with 15ml/kg, and Chinese traditional medicine treating group (group B) was treated by Yiqijiedu formular drug with 12.91 g/(kg?d). C57BL/6J wild-type mice were chosen as negative control group (group C) treated by normal saline with 15ml/kg. Epithelial tissue samples were taken from nasal cavity and nasopharyngnx of mice respectively for pathohistological evaluation by H-E staining procedures, and expression level of c-Jun and p16 in these tissue sampleswere determined by immunohistochemical methods and western blot. Results:The occurrence rates of precancerous lesions in nasal and/or nasopharyngeal epithelia in Group C, A and B were 0, 90% and 10% respectively (P

Objective: To investigate the biological phenotype and cell cycle distribution characteristics of nasal and/or nasopharyngeal epithelia of TgN(p53mt-LMP1)/HT mice.Methods: The biological phenotype changes(mainly the incidence of precancerous lesion) in nasal and nasopharyngeal epithelial tissues of the generation G4 of TgN(p53mt-LMP1)/HT mice aged 5,11,15 and 18 months were determined by H-E staining,and the cell cycle characteristics of nasal and nasopharyngeal epithelia detected by flow cytometry(FCM).Results: The incidences of precancerous lesion in the nasal and nasopharyngeal epithelia were 0,50%,60% and 75% respectively in the 5,11,15 and 18 mos groups of the positively expressed transgenic mice,and 0 in the four age groups of the negatively expressed ones.Compared with the negatively expressed transgenic mice,the number of nasal or nasopharyngeal epithelial cells was markedly decreased in the G0/G1 phase,but obviously increased in the S and G2/M phases,with the proliferation index(PI) significantly enhanced(P