相关实验视频
Updated: Jan 31, 2026

08:44
Activating Autophagy by Aerobic Exercise in Mice
Published on: February 3, 2017
12.7K
奥巴库诺因激活CRHBP介导的自而减轻西斯胺诱导的耳毒性
Shaoqin Cen1, Zhenxing Hou1, Yuan Zhang2
1Department of Otolaryngology Head and Neck Surgery, Jiangsu Provincial Key Medical Discipline (Laboratory), Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China.
Biochemical pharmacology
|January 29, 2026
概括
一种天然化合物奥巴库农 (obacunone) 通过激活自而保护免受西斯普拉丁诱导的听力损失. 它调节皮质激素释放激素结合蛋白 (CRHBP),减少毛细胞亡,并提供一种新的自身保护策略.
科学领域:
- 耳毒性研究研究
- 自然产品药理学 自然产品药理学
- 细胞和分子生物学是细胞和分子生物学.
背景情况:
- 西斯是一种重要的化疗药物,但会引起显著的耳毒性,限制其使用.
- 听力损失是西斯普拉丁治疗的常见和使人虚弱的副作用.
- 自然化合物为减轻药物诱导的毒性提供了潜在的治疗途径.
研究的目的:
- 调查obacunone对西斯普拉丁诱导的听力损失的耳保护作用.
- 阐明obacunone保护作用的潜在分子机制.
- 探索皮质热素释放激素结合蛋白 (CRHBP) 在这个过程中的作用.
主要方法:
- 在体外研究中,使用Corti 1 (HEI-OC1) 细胞的House Ear Institute-Organ.
- 在体内研究中,使用小鼠模型对西斯普拉丁诱导的听力损失进行了实验.
- 评估细胞存活率,耳扩展体的保存,听觉功能,亡,自和基因表达 (转录组概况).
主要成果:
- 在 Cisplatin 的存在下,Obacunone 显著改善了 HEI-OC1 细胞存活率,并保留了耳扩展体.
- 在暴露于西斯的小鼠中,obacunone治疗增强了听觉功能.
- 机械上,obacunone激活了自和抑制了亡,部分是通过上调CRHBP表达.
结论:
- 奥巴昆显示出显著的耳部保护作用,可以预防西斯胺诱导的听力损失.
- 该机制涉及通过CRHBP上调调节通过obacunone介导的自的激活.
- 奥巴库农是一种有前途的天然治疗剂,可以预防西斯普拉丁的耳毒性,CRHBP是潜在的治疗点.
相关概念视频
Autophagy
5.8K
Autophagy is a self-digesting process by which a cell protects itself from threats both within and outside the cell, ranging from abnormal proteins to invading bacteria. In this process, obsolete components of the cell and invading microbes are degraded by hydrolytic enzymes active in an acidic environment of the lysosomal lumen.
An autophagic pathway consists of a series of signaling events activated in response to diverse stress and physiological conditions such as food deprivation,...
An autophagic pathway consists of a series of signaling events activated in response to diverse stress and physiological conditions such as food deprivation,...
5.8K
Receptor-mediated Endocytosis
110.9K
Overview
110.9K
Receptor-mediated Endocytosis
7.8K
Receptor-mediated endocytosis is when bulk amounts of specific molecules are imported into a cell after binding to cell surface receptors. The molecules bound to these receptors are taken into the cell through inward folding of the cell surface membrane, which is eventually pinched off into a vesicle within the cell. Structural proteins, such as clathrin, coat the budding vesicle.
Clathrin-Mediated Endocytosis of LDL
One well-characterized example of receptor-mediated endocytosis is the...
Clathrin-Mediated Endocytosis of LDL
One well-characterized example of receptor-mediated endocytosis is the...
7.8K
Nonsense-mediated mRNA Decay
11.8K
The Upf proteins that carry out nonsense-mediated decay (NMD) are found in all eukaryotic organisms, including humans. Each protein has an individual role, but they need to work in collaboration. Upf1 is an ATP-dependent RNA helicase that unwinds the RNA helix. Because Upf1 can unwind any RNA, Upf2 and Upf3 are required to help Upf1 discriminate between nonsense and normal mRNAs.
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
11.8K
Eukaryotic Transcription Activators
12.8K
Transcription activators are proteins that promote the transcription of genes from DNA to RNA. In most cases, these proteins contain two separate domains ‒ a domain that binds to DNA and a domain for activating transcription; however, in some cases, a single domain is responsible for both binding and activation of transcription, as seen in the glucocorticoid receptor and MyoD.
The binding domains are capable of recognizing and interacting with regulatory sequences on the DNA. These...
The binding domains are capable of recognizing and interacting with regulatory sequences on the DNA. These...
12.8K
Induced-fit Model
89.2K
Most chemical reactions in cells require enzymes—biological catalysts that speed up the reaction without being consumed or permanently changed. They reduce the activation energy needed to convert the reactants into products. Enzymes are proteins, that usually work by binding to a substrate—a reactant molecule that they act upon.
Enzymes exhibit substrate specificity, meaning that they can only bind to certain substrates. This is mainly determined by the shape and chemical...
Enzymes exhibit substrate specificity, meaning that they can only bind to certain substrates. This is mainly determined by the shape and chemical...
89.2K

