Gender-related difference in the upper airway dimensions and hyoid bone position in Chinese Han children and adolescents aged 6-18 years using cone beam computed tomography.

OBJECTIVE: To investigate the gender-related differences in upper airway dimensions and hyoid bone position in Chinese Han children and adolescents (6-18 years) using cone-beam computed tomography (CBCT). MATERIALS AND METHODS: CBCT-scans of 119 boys and 135 girls were selected and divided into four groups (group 1: 6-9 years; group 2: 10-12 years; group 3: 13-15 years; group 4: 16-18 years). The airway dimensions including the cross-sectional area (CSA), anteroposterior (AP) and lateral (LAT) width, length (L), mean CSA and volume (VOL) of upper airway segmentations and hyoid bone position including 11 linear and three angular measurements were investigated using Materialism's interactive medical image control system (MIMICS) 16.01 software. Gender-related differences were analyzed by two independent sample t-tests. RESULTS: No gender-related difference was found in values of the facial morphology, airway dimensions and hyoid bone position for group 1 (p > 0.05). The children and adolescents in groups 2, 3 and 4 showed significant gender-related differences in the measurement results of facial morphology, airway dimensions and hyoid bone positions (p < 0.05). What's more, the measurement values of boys were obviously larger than those of girls except some measurements in group 2. CONCLUSIONS: The measurements of airway dimensions and hyoid bone positions have gender-related differences in children and adolescents aged 10-18 years. These results could be taken into consideration during orthodontic diagnosis and treatment.

[Role of CD4+CD25+Foxp3+ regulatory T cells in type 2 diabetic nephropathy].

OBJECTIVE: To investigate the role of CD4+CD25+Foxp3+ regulatory T cells (Treg) in type 2 diabetic nephropathy and provide new clues for prevention and treatment of type 2 diabetic nephropathy. METHODS: Flow cytometry was used to analyze the expression rate of CD4+CD25+Foxp3+ Treg cells in 60 patients with type 2 diabetes and 15 normal subjects. RESULTS: No significant difference was found in the expression rate of CD4+CD25+Foxp3+ Treg cells between the control group and the type 2 diabetic patients. In the type 2 diabetic patients with microalbuminuria and macroalbuminuria, the expression of CD4+CD25+Foxp3+ Treg cells was significantly lowered in comparison with that in the control group (P<0.05), and patients with macroalbuminuria showed significantly lower expression of CD4+CD25+Foxp3+ Treg cells than the microalbuminuric patinets (P<0.05). Significant inverse correlations were noted between the disease course and the expression of CD4+CD25+Foxp3+ Treg cells and between the urinary albumin excretion rate (UAER) and the expression of CD4+CD25+Foxp3+ Treg cells. CONCLUSION: CD4+CD25+Foxp3+ Treg cells may play a role in the occurrence and development of type 2 diabetic nephropathy.

Expression of high-risk HPV and p53,p21~(WAF1),MDM2 in cervical squamous cell carcinoma / 肿瘤研究与临床

Objective To determine the expression of HPV16/18,31/33 DNA and p53,p21~(WAF1) and MDM2 proteins in invasive squamous cell carcinoma of cervix (ISCC)and to indicate the significance of them in the occurrence and development of ISCC.Methods Using tissue microarray,in situ hybridization (ISH) and immunohistochemical method,we detected the expression of HPV16/18,31/33 and investigate the expres- sion of p53,p21~(WAF1),MDM2 and proteins in ISCC,CIN and NCE.Results was analysed by SPSS vision 12.5. Results The positive expression rate of HPV16/18,p53,p21~(WAF1),MDM2 in ISCC was markedly higher than in CIN and NCE.We found the difference between HPV31/33 and lymph node transfer.Significant relation- ship was observed between p53 protein expression and histological grade and lymph node metastasis of the cancer.There was positive correlation between the expression of p21~(WAF1) protein and the depth of invasion(P

Study on microsatemte instability of p14,p15,p16 gene in gastric carcinoma / 肿瘤研究与临床

Objective To detect the microsatellite instability (MSI) of D9S166,D9S171,D9S941, D9S942 and IFNA located at chromosome 9p21 in gastric carcinoma with high-grade intraepithelial neoplasia and normal tissue,and investigate the correlation of p14,p15,p16 gene and the gastric carcinogenesis. Methods 55 cases of gastric carcinoma with high-grade intraepithelial neoplasia and normal tissue were se- lected to detect MSI by microdissection,polymerase chain reaction,denaturing polyaerylamide gel elec- trophoresis and silver nitrate staining technology of five microsatellite markers on 9p21.Results In the infor- mative cases,total ratio of MSI in gastric carcinoma was 27 % (64/233) and it was 18% (42/233) in high- grade intraepithelial neoplasia.The ratio of MSI was significantly higher in gastric carcinoma than that in high-grade intraepithelial neoplasia (P