Gender specific association between body composition and early puberty among adolescent / 中国学校卫生

Objective@#To explore the association between the content and distribution of body fat and early puberty among children and adolescents, and to provide a basis for the study of the mechanism of early puberty.@*Methods@#The questionnaire survey and physical examination were conducted among the students from 2 primary schools with girlsof 3 rd-4 th grade and boys of 4 th-5 th grade and boys and girls in 7 th-8 th grade from 2 middle schools with by purposive sampling in Beijing in early January 2016. Descriptive statistics were used to describe the general information of samples. Logistic regression analyses were used to test the effects of body composition on the early puberty.@*Results@#A total of 1 527 students were included, of which 177 were early puberty and the prevalence of early puberty was 11.6%. The prevalence was 12.2% for girls and 11.0% for boys. The average value of the three skinfold thicknesses of the participants was 15.2±4.8 mm (triceps skinfold), 13.4±6.3 mm (subscapular skinfold), 14.6±6.6 mm (suprailiac skinfold), the average value of the body fat was 22.2 ± 6.2 kg, and the average value of the total fat weight was 11.2 ± 6.2 kg. After adjusting for age, single-child, family economic level and parental education level, multivariate logistic regression showed that girls with high triceps skinfold, subscapular skinfold and suprailiac skinfold were more likely to be early puberty (for triceps skinfold: OR=2.03, 95%CI=1.26-3.27; for subscapular skinfold: OR=2.14, 95%CI=1.32-3.46; for suprailiac skinfold: OR=2.05, 95%CI=1.26-3.31). Body fat content and total fat weight were also the risk factor of early puberty in girls (for body fat content: OR=1.88, 95%CI=1.17-3.02; for total fat weight: OR=2.08, 95%CI=1.31-3.32). For boys, only high subscapular skinfold increased the risk of early puberty(OR=1.90, 95%CI=1.16-3.10).@*Conclusion@#Body fat content and body fat distribution were positive associated with early puberty in children and adolescents, and there are significant gender differences.

Inhibition effects of tumor necrosis factor-alpha gene transduced tumor drainage node of lymphocytes from tongue cancer on SCID mice transplanted tumor established with human tongue carcinoma cell lines / 华西口腔医学杂志

<p><b>OBJECTIVE</b>To observe the in vivo inhibition effects of tumor necrosis factor-alpha (TNF-alpha) gene transduced tumor drainage node of lymphocytes (DNL) from tongue cancer on SCID mice transplanted tumor.</p><p><b>METHODS</b>15 human tongue carcinoma models were established in SCID mice by subcutaneously injection of squamous cell carcinoma line Tca8113. TNF-alpha gene introduced DNL, combined with low dose Pinyancin (PYC), were locally injected into tumor site. The inhibition rate was determined by the weights at the 8th week after tumor dissection and fresh specimens were prepared and subject to histopathologic examination under transmission electron microscope, and in situ TUNEL was used to detect apoptosis.</p><p><b>RESULTS</b>The TNF/DNL and rIL-2 group, and the TNF/DNL and rIL-2 and PYC group both exerted a strong inhibition effect on the implanted tumor. Treated tumors of the TNF/DNL and rIL-2 and PYC group were significantly reduced in comparison with those of the TNF/DNL and rIL-2 group (P < 0.05). The apoptosis of tumor in the TNF/DNL and rIL -2 group was evidenced based on transmission electron microscope and TUNEL analysis, and the apoptosis index was higher than that of control group (P < 0.05).</p><p><b>CONCLUSION</b>Local injection of DNL modified with TNF-alpha gene, combined with low dose PYC, exert a synergistic antitumor effect. Apoptosis may be an important mechanism of squamous cell carcinoma killed by TNF/DNL.</p>

Evaluation of fluorodeoxyglucose-position-emission tomography-computer tomography imaging on head and neck squamous cell carcinomas including primary tumors and lymph node metastases / 中华口腔医学杂志

<p><b>OBJECTIVE</b>To evaluate (18)F-fluorodeoxyglucose-position-emission tomography-computer tomography imaging ((18)F-FDG-PET-CT) on head and neck squamous cell carcinoma(HNSCCA) and lymph node metastasis.</p><p><b>METHODS</b>(18)F-FDG-PET-CT imaging of 20 patients with HNSCCA was evaluated retrospectively.</p><p><b>RESULTS</b>All the primary tumors were correctly diagnosed by (18)F-PET-CT imaging and SUV(avg) of the primary tumors was (6.22 +/- 2.20). All the sensitivity, specificity, positive predictive value and the negative predictive value were 100%. In detecting lymph node metastasis, the sensitivity was 51%, specificity 97.7%, false positive rate 2.3%, false negative rate 49%, positive predictive value 82%, and negative predictive value 91.2%.</p><p><b>CONCLUSIONS</b>(18)F-FDG-PET-CT imaging was valuable in detecting HNSCCA and lymph node metastasis. SUV was helpful for differential diagnosis between benign or malignant tumors but it needs further study to determine the cutoff SUV for differentiating lymph node metastasis.</p>

Experimental study on ultrasound heating affecting the sensitivity of oral carcinoma to chemotherapy drugs / 华西口腔医学杂志

<p><b>OBJECTIVE</b>To explore the influence of chemosensitivity of Tca8113 cells by modified MTT assay after the animal model of Tca8113 were treated by the ultrasound hyperthermia.</p><p><b>METHODS</b>The MTT assay of the BALB/C nu/nu mice model of Tca8113 cells treated by the ultrasound hyperthermia in vivo was performed.</p><p><b>RESULTS</b>The chemosensitivity to the 9 kinds of drugs demonstrated no significant differences between the Tca8113 cells in the control group, the 39 degrees C-treated group and the groups treated from 41 degrees C to 44 degrees C. But significant differences between the 40 degrees C-treated group and the 41 degrees C or 42 degrees C-treated group existed. In the heating-time grades test, there were no significant differences in the chemosensitivity to the 9 kinds of drugs between these three pairs of group (the control group and the 15 min-treated group, the 30 min-treated and the 45 min-treated group, the 60 min-treated and the 75 min-treated group). But there were significant differences between the 30 min-treated or the 45 min-treated group and the 60 min-treated or the 75 min-treated group.</p><p><b>CONCLUSION</b>Ultrasound hyperthermia performed in 42 degrees C for 30-45 min can improve the chemosensitivity of Tca8113 cells to some drugs significantly, which confirms the rationality of synchronous combination of hyperthermia and chemotherapy in the chemosensitivity point of view for the first time.</p>

Genetic linkage analysis and mutation detection in Chinese families with basal cell nevus syndrome / 中华口腔医学杂志

<p><b>OBJECTIVE</b>To study the molecular genetic etiology of a Chinese pedigree with basal cell nevus syndrome.</p><p><b>METHODS</b>The proband and his affected mother and a unaffected individual in the pedigree were chosen and peripheral blood was collected from them for DNA. Direct sequencing was performed to detect the mutations of PTCH gene. In order to further confirm the results of sequence analysis, all available family members were analyzed with genetic linkage analysis using 3 highly polymorphic microsatellite DNA markers in the region of 9q22.3-q31.</p><p><b>RESULTS</b>No mutations of PTCH gene was detected in the proband's mother, one synonymous mutation was detected in the proband. Linkage analysis showed that the Lod scores of the 3 markers were: D9S283, Z = -2.11 (theta = 0.00); D9S1690, Z = -2.95 (theta = 0.00); D9S1677, Z = -5.94 (theta = 0.00).</p><p><b>CONCLUSIONS</b>In this pedigree, mutation of PTCH gene is not related to the underlying pathogenesis of the syndrome.</p>