OBJECTIVE: To explore the expression levels of three T-type calcium channel receptors (α1G; α1H; α1I) in the cochlea and spiral ganglion neurons of C57BL/6J mice with different ages. METHOD: Thirty cases of C57BL/6J mice were divided into three groups (6-8 W, 24-26 W, 42-44 W) according to the age. The expressions of three T-type calcium channel receptors were quantified by RT-PCR after hearing thresholds measured by ABR. RESULT: Three receptors were detected in the cochlea and spiral ganglion neurons of 6-8 W C57BL/6J mice. The quantitative results showed that the expression levels of α1H and α1I were highest among three receptors in spiral ganglion neurons and in the cochlea respectively. The expression levels of three receptors significantly decreased with age,especially at the age of 4244 W. CONCLUSION The expression of T-type calcium channel receptors reduced with age in the inner ear of C57BL/6J mice.
Animals ; Calcium Channels ; Calcium Channels, T-Type ; biosynthesis ; Cochlea ; metabolism ; Ear, Inner ; Mice ; Mice, Inbred C57BL ; Neurons ; Receptors, Calcium-Sensing ; Spiral Ganglion ; metabolism

OBJECTIVE: To investigate the role and significance of CD45RO in occurance and development in laryngeal squamous carcinoma, and to provide some valuable clues for searching new approaches to assess prognosis and theoretical basis for tumor biotherapy. METHOD: The expression of CD45RO protein in 50 cases of laryngeal squamous carcinoma and 10 cases normal mucos was detected by immunohistochemical S-P method. RESULT: The positive rate of CD45RO was 30% and 86% respectively in normal tissue and laryngeal squamous cell carcinoma tissue. The expresion of CD45RO was significantly and negatively associated with local metastatic of lymph nodes 0.713, P < 0.05) and tumor sites (r = -0.750, P < 0.05), but it have no notable difference with pathology differentiation, age, infiltrating depth and clinical stages in 50 cases of laryngeal squamous cell cancer. CONCLUSION (1) The expresion of CD45RO in laryngeal squamous cell cancer is more than that in normal tissue. (2) It is possible that overexpresion of CD45RO in laryngeal squamous cell carcinoma cut local metastatic lymph nodes. (3) It is probable that overexpresion of CD45RO in laryngeal squamous cell cancer made for prognosis of patients. (4) Other than UICC-TNM stage, pathology differentiation, it provide valuable clues for searching new approaches to assess prognosis of laryngeal squamous cell carcinoma.
Carcinoma, Squamous Cell ; blood ; pathology ; secondary ; Female ; Humans ; Laryngeal Neoplasms ; blood ; pathology ; Leukocyte Common Antigens ; blood ; Lymph Nodes ; Lymphatic Metastasis ; Male ; Prognosis

Objective:To assess the value of spiral CT in diagnosis and treatment of chronic otitis media.Methods:The spiral CT findings of 74 cases including 93 ears proved by operation and pathology were studied.Results:The lesions such as the disruption of the ossicular chain showed in spiral CT or three-dimensional image were in accord with those seen in the operation,the accuracy was 95.7%,the disruption of the ossicular chain and bony erosion in the tympanic cavity and antrum were severe in the typeⅢ chronic otitis media.Conclusion:Spiral CT is helpful to diagnose and definite the chronic otitis media,three-dimensional image can provide valuable information for surgery.