Objective To explore the role of HPV16 and p53 protein in the pathogenesis of tumors of nasal cavity and sinus of Chinese people. Methods The expression of HPV16 and p53 in 58 tumor samples of nasal cavity and sinus was detected by immunohistochemistry. Results There was no p53 expression in inverted pipillomas(IP). HPV16 infection rate in IP was 62.5%. The positive rate of p53 protein in the malignant tumors and IP with atypical hyperplasia was 56.0% and 44.4%, respectively, and HPV16 infection rate in the both tissues was 24.0% and 66.7%, respectively. The positive rate of p53 and HPV16 simultaneous expression in IP with atypical hyperplasia were 33.3%, which was higher than that in the malignant tumors and IP without atypical hyperplasia. Conclusion The high-risk HPV16 infection may be primary cause of IP. p53 gene mutation may be close relation with the pathogenesis of nasal cavity and sinus malignant tumors. HPV16 and p53 may have synergic effect in the malignant transformation of nasal cavity and sinus benign tumors.

0.05). Conclusion The p53 gene mutation has close relation with nasal malignant tumor , and may has no related to the pathogenesis of IP possible.

OBJECTIVE: Detect the expressions of the protein tyrosine phosphatase gene (PTEN), phosphorylated protein kinase B (P-AKT) and phosphorylated extracellular signal-regulated kinase (P-ERK) in human middle ear cholesteatoma tissue and its correlation to explore their important role in the mechanism of the formation of cholesteatoma. METHOD: Use immunohistochemical SABC method (SABC immunohistochemical method) to detect the expressions and location of PTEN, P-AKT and P-ERK proteins in 40 cases of middle ear cholesteatoma tissue samples and 15 cases of normal ear skin specimens. Use Western blot to detect the expression levels of PTEN, P-AKT, P-ERK proteins and the internal reference GAPDH in 20 cases of cholesteatoma tissue and 10 cases in nor mal ear skin specimens. RESULT: (1) Immunohistochemistry showed coloring of PTEN both in the nucleus and cytoplasm of cholesteatoma and normal skin . Nuclear PTEN positive expression rates in the cholesteatoma was significantly lower than normal skin, and the difference was significant (P < 0.01); cytoplasm PTEN positive expression rates in the cholesteatoma was significantly lower than normal skin, and the difference was significant (P < 0.01); P-AKT mainly expresses in the cytoplasm of cholesteatoma and normal skin. The positive expression rates in the cholesteatoma was significantly higher than normal skin,and the difference was significant (P < 0.01); the P-ERK mainly colors in cholesteatoma and normal skin cell nucleus. the positive expression rates in the cholesteatoma was significantly higher than normal skin, and the difference was significant (P < 0.01). In cholesteatoma specimens, there was a significantly negative relationship (P < 0.01) between PTEN, respectively, and P-AKT, P-ERK protein. (2) Western blot discovered: the expression of PTEN in cholesteatoma was significantly less than the amount of expression in normal skin; P-AKT and P-ERK expression in cholesteatoma was significantly more than the level in normal skin. CONCLUSION Abnormal expression of PTEN, P-AKT and P-ERK protein in cholesteatoma may be closely related to antiapoptosis and high degree of proliferation in cholesteatoma. Expression of PTEN deletion leads to the weakening of the inhibition. Excessive expression of P-AKT gives rise to cholesteatoma epithelial cell apoptosis inhibited; excessive PERK expression result to cholesteatoma epithelial cell proliferation strengthened.
Apoptosis ; Cell Proliferation ; Cholesteatoma, Middle Ear ; metabolism ; pathology ; Epithelium ; metabolism ; Extracellular Signal-Regulated MAP Kinases ; metabolism ; Humans ; PTEN Phosphohydrolase ; metabolism ; Phosphorylation ; Proto-Oncogene Proteins c-akt ; metabolism

Objective　The clinical manifestations and mechanism of pathological synkinesia were studied. Methods　Recurrent pathological synkinesia was measured by clinical and experimental nictitation reflex. The changes of nerve-muscle junctions were observed via scanning electron microscope. Results　All the 32 cases of pathological synkinesia were denervation of degree Ⅲ and severe facial palsy. Reaction undulatory forms of musculus orbicularis oculi and musculus orbicularis oris recorded simultaneously at the stimulated side in trigemial-facial nerve reflex test accounted for 81%(28/32) patients and 89% guinea pigs. Conclusion　Pathological synkinesia was the marker of severe facial palsy and was related with over-error in regeneration of nerve.

Objective To observe the central retinal artery (CRA) hemodynamics of diabetic patients befroe and after treatment with fosinopril.Methods 19 cases (38 eyes) were treated with fosinopril,10 mg/d.Peak systolic velocity (Vs),mean velocity (Vm),endodiastole velocity (Vd),pulse index (PI) and resistance index (RI) of CRA were measured before and one month after treatment using color doppler flow imaging and compared with that of controls.Results Before treatment with fosinopril the CRA Vs,Vm and Vd of the patents were lower but PI and RI were higher than that of controls.After treatment the CRA Vs,Vm and Vd of the patients were increased but PI and RI were decreased (P

Purpose:To study the expression of Epstein-Barr virus gene BARF1 in nasopharyngeal carc inoma cells, to uncover the mechanism and effects of Epstein-Barr virus in the pathogenesis of EBV related carcinomas, and to offer some experimental supports for the prevention and treatment of EBV related carcinomas Methods :After RNA extraction from nasopharyngeal carcinoma samples, RT-PCR was con ducted to amplify the EBV gene EB virus associated nuclear antigen-1 (EBNA1) an d the new gene Bam HI A open reading frame 1 (BARF1) Then the PCR products wer e electrophoresed by 2% agarose gel and the product bands were detected and phot ographed Results:Of the 13 samples, 11 were qualified for the RNA qualit y And all of the 11 NPC cases were EBNA1 positive, showing the EB virus infect ion in the carcinoma cells 9 of the 11 cases were BARF1 positive, the positive rate was nearly 82% Conclusions:The EB virus gene BARF1 was highly expressed in the NPC samples This implies t hat apart from the latent membrane protein 1 (LMP1), BARF1 may play an important role in the pathogenesis of NPC The exact mechanisms of the BARF1 effects on the pathogenesis of NPC need to be studied further

Benign Paroxysmal Positional Vertigo ; therapy ; Combined Modality Therapy ; methods ; Humans ; Otolaryngology ; methods ; Semicircular Canals

Objective To observe the effects of rehabilitation in the 55 prelingually deaf pediatric cases for two years after cochlear implantation ,factors including cochlear implantation and recovery time ;to compare the re-covery effects in the group of 1 to 3 years old children with the group of 3~5 years old (including the age of 3 years old) who lost their hearing before learning to speak ,and to provide clinical evidence for providing cochlear implant therapy to the prelingually deaf children as early as possible .Methods A total of 55 pediatric relingually deaf cases were included in this study .According to their implantation time and application duration ,they were divided into 2 groups :1 to 3 years old group (32 cases) ,and >3 to 5 years old group (23 cases) respectively .The hearing ,lan-guage and learning abilities on 1 ,3 ,6 ,12 ,18 ,24 months after cochlear implantation were evaluated ,using statisti-cal method to record CAP and SIR scores .Results The rehabilitation effects ,the average ages ,CAP ,speech rec-ognition rates and SIR were increased two years afterwards .The effects of younger age group were more noticeable than that in the older group .The differences between the two groups were statistically significant (P<0 .05) .Av-erage speech recognition rates ,average speech rehabilitation effects in each postoperative period of younger age group were better than those of in older age group ,showing significant differences (P<0 .05);CAPs in the younger age group on 1 ,3 and 12 months after CI surgery were significantly higher than those of in the older group (P value were 0 .001 ,0 .001 and 0 .002 ,respectively) .SIR in the younger age group at the time of 1 ,3 ,12 ,24 months were significantly higher than those of in the older group(P values were 0 .00 ,0 .00 ,0 .00 and 0 .024 ,respectively) . Conclusion Implanted age and recovery time are the key factors that influence the effects of postoperative rehabilita-tion .The younger when the children get cochlear implantation and the longer the recovery time takes during two years after cochlear implantation ,the better the results are .The standardization of domestic assessment for the re-covery effects and the international evaluation method have a certain degree of equivalence .

Objective To investigate the effects of interferon-gamma (IFN-γ) on migration,invasion and vasculogenic mimicry (VM) formation of human melanoma cell line MUM-2B. Methods MUM-2B cells were divided into three groups, control group (10%FBS in DMEM), treatment group1 (10μg/L IFN-γ) and treatment group2 (100μg/L IFN-γ). Different concentrations of IFN-γ were added in the culture medium of MUM-2B cells. Wound-healing assay and matrigel invasion assay were performed to examine the migration and invasion ability of MUM-2B cells. Three-D culture was used to observe the VM formation. The expression of vascular endothelial growth factor (VEGF) of MUM-2B cells was detected by Western blot assay. Results The result of wound-healing assay showed that the migration distance of cells was decreased in treatment groups compared with that of control group. The migration distance of cells was decreased in treatment group 2 compared with that of treatment group 1(P＜0.05). The result of matrigel invasion assay showed that the number of invaded cells was decreased in treatment groups compared with that of control group, and which was significantly decreased in treatment group2 than that of treatment group1 (P＜0.05). The result of 3-D culture showed that cells in control group can form typical VM tube-like structures, whereas cells in treatment groups cannot. Western blot assay showed that the expression of VEGF protein was significantly decreased in treatment groups compared with that of control group, and the expression of VEGF protein was significantly decreased in treatment group2 than that of treatment group 1(P＜0.05). Conclusion These data suggest that IFN-γinhibits migration and invasion of MUM-2B cells, and inhibits VM formation by down regulating VEGF expression in vitro.

Objective To investigate the clinical efficacy of nerve growth factors in the treatment of sudden deafness.Methods A retrospective analysis was performed on 124 cases of hospitalized patients who suffered from unilateral sudden deafness from November 2013 to February 2015.The patients were divided into two groups: 59 in the treatment group and 65 in the control group.Each group was further divided into four subgroups according to different audiometric curves: the low-frequency declining type, the high-frequency declining type, the flat type, the completely deafness type.The control group: the patients were treated with the conventional therapy according to different audiometric curves.The treatment group: intramuscular mouse nerve growth factor treatment was added on the basis of conventional therapy mentioned above.The both treatments lasted 10 days.The total efficiency of two groups was compared ,and the efficiency of the subgroups was also compared.Results The total efficiency of the treatment group was 64.40% and 44.62% for the control group.The total efficiency of the treatment group was significantly higher than the control group.The analysis revealed as having statistically significant differences (x2=4.877,P=0.032<0.05).The total efficiency of the sub-groups by different audiometric curves was further analyzed.All the total efficiency of the sub-groups in treatment group were higher than the sub-groups in the control group, but the results were notconsidered as significantly different(P>0.05).Conclusion The mouse nerve growth factor has a positive effect on the treatment of sudden deafness, and has shown the acceptable clinical efficacy without side-effect.Thus the mouse nerve growth factor is a safe and effective drug for treating sudden deafness.