OBJECTIVETo investigate the contribution of latent membrane protein (LMP)1 to nasopharyngeal carcinogenesis via Wnt/β-catenin signal pathway.

METHODSThe recombinant plasmid pHA2-LMP1 was constructed; immunofluorescence staining, Dual-Luciferase Reporter Assay, Western blot and immunohistochemistry staining were used to study the effect of LMP1 on the transcriptional activity and expression of β-catenin.

RESULTS(1) Abnormal expression of β-catenin was obtained in 38 cases (50.7%, 38/75), LMP1 expression was obtained in 38 cases (50.7%, 38/75). There was significantly positive correlation between LMP1 expression and abnormal expression of β-catenin in nasopharyngeal carcinoma tissue (P = 0.008). (2) The expression of β-catenin in nuclei of NPC cell line CNE1 and CNE2 transfected with pHA2-LMP1 plasmid dramatically increased, and the expression was remarkable in poorly-differentiated NPC cell line CNE2 than that of well-differentiated CNE1 cells. (3) LMP1 expression dramatically increased the transcriptional activity of β-catenin in CNE1 and CNE2 cells transfected with pHA2-LMP1 and was in a time-dependent. The transcriptional activity of β-catenin was higher in poorly-defferentiated cell line CNE2 than that of well-differentiated NPC cell line CNE1. (4) LMP1 expression did not affect the total protein expression level of β-catenin in both CNE1 and CNE2 cell lines.

CONCLUSIONEB virus-encoded LMP1 may be involved in the pathogenesis of NPC via β-catenin signal pathway.

Adult ; Aged ; Cell Line, Tumor ; Female ; Gene Expression Regulation, Neoplastic ; Humans ; Male ; Middle Aged ; Nasopharyngeal Neoplasms ; metabolism ; pathology ; Plasmids ; Recombinant Proteins ; metabolism ; Signal Transduction ; Transcriptional Activation ; Transfection ; Viral Matrix Proteins ; metabolism ; Wnt Proteins ; metabolism ; Young Adult ; beta Catenin ; metabolism

Aged ; Female ; Hodgkin Disease ; diagnosis ; pathology ; Humans ; Reed-Sternberg Cells ; pathology

Objective To analyze the awareness on health among high school students and its influencing factors in Guangdong. Methods Multi-stage sampling and questionnairs "2009 health awareness survey of the Chinese citizens" developed by our Department of Health, were used. Data were analyzed by multivariate multilevel model under MLwinN 2.19 software. Results The mean scores on knowledge and ideas, behaviors and related skills among 1606 high school students of Guangdong province, were 69.08 ± 14.81,60.05 ± 16.85 and 74.99 ± 21.17 respectively. Three items on health showed that they all related to each other and relations between grades (0.972,0.715 and 0.855) were greater than the individuals (0.565,0.426 and 0.438). Conclusion Factors as students from outside the Pearl River Delta region or from the rural areas, being male, at general secondary schools, at grade one, with poor academic performance and more pocket money etc., had lower levels on those related information of health.

Objective To investigate clinically and in laboratory a genealogical tree with hemoglobin H disease Combining Hemoglobin Q-Thailand and Hemoglobin E Disease.Methods Genealogical laboratory studies were carried out with the following methods:hemoglobin electrophoresis, various biochemical determinations,and DNA analysis.Results Father's genotype of ?-THAL:??/?~Q ?~(4.2); genotype of ?-THAL:?E/N;phenotype:minor ?-THAL carrier combining Hb Q and Hb E multiple heterozygote;mother' s genotype of ct-THAL:--~(SEA)/??;genotype of ?-THAL:?n/?n.According to comprehensive analysis,mother's phenotype:minor ?-THAL,complex minor ?-THAL carrier combining Hb F ? Initial sign of ?-THAL genotype:--~(SEA)/?~Q ?~(4.2);phenotype:deletion type Hb H genotype disease;?- THAL genotype:?E/?E;phenotype:? E homozygote.According to comprehensive analysis:deletion type Hb H combining HbE multiple heterozygote.Youger brother's ?-THAL genotype:--~(SEA)/?~Q ?~(4.2);?-THAL genotype:?n/?n;phenotype:deletion type Hb H disease.Both mother and her youngest son have G6PD deficiency.Conclusions Guangdong Province is an area with high morbidity of ?-THAL and ?-THAL,Hb E and Hb Q as well as G6PD deficiency.There may be some correlation between Hb E and Fib Q in term's of the high morbidity of regional Hb,but the two types of Hb combining Hb H disease are rare in China and the world in point of nonhomologous chromosome.Attention should be paid to the problems of double heterozygote of ?-THAL complex ?-THAL,and THAL complex G6PD deficiency.Data from the study have enriched the scientific information of molecular genetics of erythroeyte thalassemia and of molecular pathology with important significance in genetics guidance and clinical treatment for patients.

OBJECTIVETo explore the secular trend in incidence and mortality rate of gastric cancer in Tianjin and to provide evidence and reference for making prevention and control strategy for gastric cancer.

METHODSData derived from Tianjin cancer registry system were analyzed by descriptive epidemiological method and Joinpoint model. A total of 17990 gastric cancer cases reported in Tianjin from 1981 to 2002, including 12755 males and 5235 females were studied.

RESULTSThe annual percent change (APC) of crude incidence rate for males and females was -0.92% (Z = -3.85, P = 0.001) and -0.79% (Z = -2.67, P = 0.015), while the APC of standard incidence rate was -3.55% (Z = -13.52, P = 0.000) and -3.47% (Z = -12.85, P = 0.000). There was a descending trend of incidence rate in males and females above 45-years-old, however, in male under 45 years it showed an increased trend and in females it kept stable. The APC of crude mortality rate was -1.66% ( Z = -5.79, P = 0.000) for males and -1.84% (Z = -6.02,P = 0.000) for females, while the APC of standard mortality rate was -4.60% ( Z = -15.79, P = 0.000) for females and -5.36% ( Z = -8.28, P = 0.000) for males during 1989-2002. Mortality and incidence ratio also indicated a downward trend.

CONCLUSIONDespite its declining trend in Tianjin, gastric cancer still remains an important public health problem in facing of the aging society and many risk factors.

Adolescent ; Adult ; Aged ; Child ; Child, Preschool ; China ; epidemiology ; Female ; Humans ; Incidence ; Infant ; Infant, Newborn ; Male ; Middle Aged ; Risk Factors ; Stomach Neoplasms ; epidemiology ; mortality ; Survival Rate

OBJECTIVETo detect the expression of cytokeratin 20 (CK20) mRNA in peripheral blood of colorectal carcinoma and to discuss its clinical value.

METHODSReal-time fluorescent quantitative RT-PCR was used to detect the CK20 mRNA expression in the peripheral blood of 51 patients with colorectal carcinoma and 30 healthy volunteers.

RESULTS27.45% of the patients showed CK20 mRNA expression, while it was 6.67% for the control group (P<0.025). With the progress of Dukes' stages, the expression level of CK20 mRNA increased, but there was no statistic significance (P<0.05). More samples in Dukes'C and D than in Dukes'A and B stages showed >10 copies/ml.

CONCLUSIONThe detection of CK20 mRNA expression in peripheral blood of patients with colorectal carcinoma may be helpful to identify early shedding tumor cells. It is also useful to monitor the progression of the disease and observe the effect of clinical treatment.

Adult ; Aged ; Aged, 80 and over ; Colorectal Neoplasms ; blood ; genetics ; metabolism ; Female ; Humans ; Intermediate Filament Proteins ; biosynthesis ; blood ; genetics ; Keratin-20 ; Lymphocytes ; metabolism ; Male ; Middle Aged ; RNA, Messenger ; biosynthesis ; blood ; genetics ; Reverse Transcriptase Polymerase Chain Reaction ; methods

OBJECTIVETo compare the differences in the efficacy on distant version of naked eye in the patients of juvenile myopia between rotating manipulation and lifting-thrusting manipulation of acupuncture.

METHODSOne hundred and twenty cases (240 eyes) were randomized into a rotating manipulation group and a lifting-thrusting manipulation group, 60 cases (120 eyes) in each group. Additionally, a corrective lenses group, 60 cases (120 eyes), was set up as the control. In both manipulation groups, Cuanzhu (BL 2),Yuyao (EX-HN 4), Sizhukong (TE 23), Taiyang (EX-HN 5), Fengchi (GB 20), Zusanli (ST 36), Guangming (GB 37) and Sanyinjiao (SP 6) were punctured, but stimulated with rotating manipulation and lifting-thrusting manipulation respectively three times per week, 10 times as a treatment session and totally one session was required. In the corrective lenses group, the glasses were applied at daytime. The clinical efficacy and the changes in distant vision of naked eye before and after treatment were compared among the three groups.

RESULTSThe total effective rate was 87.5% (105/120) in the rotating manipulation group, which was better than 69.2% (83/120) in the lifting-thrusting manipulation group (P < 0.05). The distant vision of naked eye was improved apparently in the rotating manipulation group and the lifting-thrusting manipulation group after treatment (both P < 0.05). But it was not improved in the corrective lenses group (P > 0.05). The distant vision of naked eye was improved more apparently after treatment in the rotating manipulation group as compared with that in the lifting-thrusting manipulation group (0.75 +/- 0.23 vs 0.68 +/- 0.24, P < 0.05). For 96 cases (192 eyes) with acupuncture treatment, in 3-month follow-up, 87.0% (167/192) of the cases maintained the stable vision as the original level and 13.0% (25/192) of them were reduced in the vision In the acupuncture groups, it was found that the improvement of distant vision of naked eye was more obvious after treatment with younger age, better basic vision and shorter duration of sickness (all P < 0.05).

CONCLUSIONAcupuncture achieves the positive and sustainable clinical effect on juvenile myopia, and the results of rotating manipulation are superior to that of lifting-thrusting manipulation. Age, basic vision and duration of sickness impact the clinical efficacy.

Acupuncture Points ; Acupuncture Therapy ; instrumentation ; methods ; Adolescent ; Child ; Female ; Humans ; Myopia ; therapy ; Young Adult

OBJECTIVELeukemia is a major cause of death of children in China, which accounts for 50 % of all cancers of children. Data from Tianjin Cancer Hospital was analyzed for mortality of leukemia in children under 20 years from 1981 to 2000 in the city of Tianjin.

METHODSAll physicians and medical staff of the hospitals and clinics in the registry area were responsible for filling out the report forms for every new case diagnosed as malignant tumors. Death certificates for malignant tumors have been registered at the local police station and the residential files were checked. All cancer cases with insufficient information were traced to his/her family and relevant persons worked in the clinic. Tianjin Cancer Registry Center periodically conducted an active re-checking program to review all patient records on cancers that was not registered in this period. Tumors diagnosed in this study were coded according to the International Classification of Diseases for Oncology (ICD-O). Mortality rates were calculated by age, sex and date of death.

RESULTSThe types of acute lymphoid leukemia, acute myeloid leukemia and chronic myeloid leukemia were the most common types of childhood leukemia in Tianjin, comprised 69.3%, 20.9 % and 8.0%, respectively. The mortality for childhood leukemia decreased slowly during the period of 1981 to 2000 in Tianjin. Mortality and morbidity ratios were 0.51.

CONCLUSIONCombined with characteristics of individual forms of childhood leukemia mortality, further epidemiological research is needed to prevent childhood leukemia.

Adolescent ; Cause of Death ; Child ; Child, Preschool ; China ; epidemiology ; Humans ; Infant ; Leukemia ; mortality ; Young Adult

This study is aimed at establishing a sensitive approach to detect disseminated tumor cells in peripheral blood and evaluate its clinical significance. A total of 198 blood samples including 168 from colorectal carcinoma (CRC) patients and 30 from healthy volunteers were examined by quantitative real-time reverse transcription-polymerase chain reaction (RT-PCR) to evaluate the expression of carcinoembryonic antigen (CEA), cytokeratin 20 (CK20) and cytokeratin 19 (CK19) mRNA. CEA mRNA was detected in 35.8% of patients and 3.3% of controls, CK20 mRNA in 28.3% of patients and 6.7% of controls, and CK19 mRNA in 41.9% of patients and 3.3% of controls. CEA and CK20 mRNA positive ratio increased with the advancing Dukes stages, but there was no significant difference in positive ratio between any two stages (P>0.05). Also, relatively high positive ratio of CEA, CK20 and CK19 mRNA expression was observed in some CRC patients with earlier Dukes stages. A higher positive ratio was obtained when two or three detection markers were combined compared to a single marker. Our study indicates that quantitative real-time RT-PCR detection for CEA, CK20 and CK19 mRNA in peripheral blood is a valuable tool for monitoring early stage dissemination of CRC cells in blood circulation.
Adult ; Aged ; Aged, 80 and over ; Biomarkers, Tumor ; biosynthesis ; blood ; genetics ; Carcinoembryonic Antigen ; biosynthesis ; blood ; genetics ; Carcinoma ; blood ; genetics ; Colorectal Neoplasms ; blood ; genetics ; Female ; Humans ; Keratin-20 ; Keratins ; biosynthesis ; blood ; genetics ; Male ; Middle Aged ; RNA, Messenger ; blood ; genetics ; Reverse Transcriptase Polymerase Chain Reaction ; Sensitivity and Specificity