Cisplatin-Induced Damage of C57 Mice Hair Cells in Cochlear Organizational Cultures
- VernacularTitle:顺铂对离体C57小鼠耳蜗毛细胞的损害作用
- Author:
Shan ZENG
;
Dongzhen YU
;
Zhengnong CHEN
;
Bin CHEN
- Publication Type:Journal Article
- Keywords:
Auditory hair cell;
Cochlea;
Organizational cultures;
Cisplatin
- From:
Journal of Audiology and Speech Pathology
1997;0(04):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the characteristic of the cisplatin-induced damage of hair cells in cochlear organotypic cultures. Methods Three to four-day-old (P3～4) C57 mice were used for this study. The cochlear basilar membrane was cultured for 6~8 hours and then treated with different doses of cisplatin(0?mol/L, 10?mol/L, 50?mol/L, 100?mol/L, 400?mol/L, 1000?mol/L,7 cochlears for 0-100?mol/L group, 6 cochlears for the rest dosage, control group used the dose of 0?mol/L)for 48 hours.TRITC-phalloidin and DAPI were used for stain. The entire cochlear hair cells were observed and counted under Nicon fluorescent microscope. Data was analyzed by LS for hair cells loss graph and SAS 8.0 for linear regression analysis. Results Hair cells loss had rarely been seen in the control group of cochlear tissue under the culture condition. How ever, in cisplatin treated groups, the hair cells loss increased from 14.5% to 78.4% with the concentration of cisplatin increased in the range of 10?mol/L-100?mol/L, while decreased from 48.8% down to 8.77% with the dose getting further higher to 400?mol/L and 1000?mol/L. Apoptosis was confirmed by the DAPI stain in the hair cells loss area. The hair cell loss shows no difference from the apex to the basal turn of the basilar membrane. Conclusion Cisplatin-induced hair cell death shows characteristic damage that it is dose-dependent in a certain range of dosage, and it decreases when the cisplatin dose higher than the one caus maximal damage under the condition of cochlear organotypic cutures. Apoptosis happens evenly in inner and outer hair cells in all turns of basilar membrane.
