Use of lysine-specific demethylase 1 (LSD1) inhibitor
A demethylase, specific technology, applied in the field of hearing protection for sensorineural deafness caused by aminoglycosides, and the hearing protection effect of LSD1 inhibitors for sensorineural deafness
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Embodiment 1
[0073] Example 1 Establishment of a zebrafish lateral line system hair cell injury model
[0074] The Brn3c:mGFP transgenic zebrafish (Eaton-Peabody Laboratory, Harvard University Eye and Ear Hospital, USA) was used in this study. Zebrafish were grown in a constant temperature environment of 28.5°C, with a photoperiod of 14 hours of light / 10 hours of darkness, and the breeding program was carried out according to the "Zebrafish Book" (http: / / www.zfin.org). The specific operation is as follows:
[0075] ① Expose 5 days post fertilization (5dpf) zebrafish to zebrafish feeding water containing 400 μM neomycin for 1 hour;
[0076] ② Rinse 3 times in fresh zebrafish rearing water;
[0077] ③ 0.02% MS-222 anesthetized for 5 minutes;
[0078] ④ Fix with 4% paraformaldehyde at room temperature for 2 hours;
[0079] ⑤ Rinse with 0.01M PBS for 5min×3;
[0080] ⑥1:800DAPI at room temperature for 20min;
[0081] ⑦Seal the slide and observe the hair cell damage in the lateral line sy...
Embodiment 2
[0082] Embodiment 2 utilizes zebrafish model to carry out drug screening
[0083] 1) S2101-neomycin treatment: zebrafish embryos developed to 5dpf before drug treatment: including control group (DMSO20μM) and S2101 experimental group (5μM, 10μM, 20μM). After drug treatment for 2 hours, neomycin was added to injure for 1 hour (400 μM), rinsed 3 times in fresh zebrafish feeding water, anesthetized with MS-222 for 5 minutes, fixed with 4% paraformaldehyde at room temperature for 2 hours; rinsed with 0.01M PBS for 5 minutes×3; 1:800 DAPI Room temperature for 20 minutes; cover the slides, observe and count under a fluorescence microscope, and observe the survival of lateral liner hair cells. Among them, n=50-70, statistical results were analyzed with SPSS11.5 statistical software ( figure 2 ).
[0084] 2) CBB1007-neomycin treatment: zebrafish embryos developed to 5dpf before drug treatment: including control group (DMSO100μM) and CBB1007 experimental group (20μM, 50μM, 100μM). ...
Embodiment 3
[0085] Example 3 Establishment of mouse cochlear hair cell injury model
[0086] 1) In vitro model
[0087] ① Isolation of auditory epithelium from neonatal mouse cochlea
[0088] ② In vitro tissue culture of neonatal mouse auditory epithelium
[0089] ③Drug treatment
[0090] The newborn mouse cochlear auditory epithelium was isolated and adhered to the wall for 2 hours. After the specimen adhered to the wall, it was added to serum-free DMEM / F12 medium containing S2101 or CBB1007 for co-culture for 24 hours, and then added to serum-free DMEM / F12 containing 1mM neomycin. The F12 medium was co-cultured for 4 hours. Rinse 3 times in serum-free DMEM / F12. Finally, serum-free medium was added for co-cultivation for 24 hours, and the hair cell injury model of the cochlear basement membrane showed a gradient change from the bottom circle to the top circle ( image 3 , the bottom circle is severe, the top circle is slight).
[0091] 2) In vivo model
[0092] The experiment adop...
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