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Alterations in the gene expression profile in SKOV3 cells exposed to elaiophylin

ABSTRACT: Elaiophylin was screened and identified as a novel autophagy inhibitor, with significant antitumor efficacy as a single agent. To explore the mechanisms by which elaiophylin kills cancer cells, NimbleGen 12x135K microarrays were used to find the gene expression changes in SKOV3 cells treated with elaiophylin for indicated time points. The gene expression microarray data were also analyzed and described in our previous study. Zhao, X., Fang, Y., Yang, Y., Qin, Y., Wu, P., Wang, T., Lai, H., Meng, L., Wang, D., Zheng, Z., Lu, X., Zhang, H., Gao, Q., Zhou, J., & Ma, D. (2015). Elaiophylin, a novel autophagy inhibitor, exerts antitumor activity as a single agent in ovarian cancer cells. Autophagy, 11(10), 1849–1863 (PMID: 25893854).

ORGANISM(S): Homo sapiens

PROVIDER: GSE205529 | GEO | 2022/06/07

REPOSITORIES: GEO

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Project description:This experiment was conducted to identify the mitochondrial protein changes in the presence and absence of LONP1 in skeletal muscle. The following abstract from the submitted manuscript describes the major findings of this work.Disuse-associated loss of muscle LONP1 impairs mitochondrial quality and causes reduced skeletal muscle mass and strength. Zhisheng Xu, Tingting Fu, Qiqi Guo, Danxia Zhou, Wanping Sun, Zheng Zhou, Lin Liu, Liwei Xiao, Yujing Yin, Yuhuan Jia, Xin Pan, Lei Fang, Min-sheng Zhu, Wenyong Fei, Bin Lu and Zhenji Gan. Mitochondrial proteolysis is an evolutionarily conserved quality control mechanism to maintain proper mitochondrial integrity and function. However, the physiological relevance of stress-induced impaired mitochondrial protein quality remains unclear. Here, we demonstrate that LONP1, a major mitochondrial protease resides in the matrix, plays a critical role in controlling mitochondrial quality as well as skeletal muscle mass and strength in response to muscle disuse. In humans and mice, disuse-related muscle loss is associated with decreased mitochondrial LONP1 protein. Skeletal muscle-specific ablation of LONP1 in mice resulted in impaired mitochondrial protein turnover, leading to mitochondrial dysfunction. This caused reduced muscle fiber size and strength. Mechanistically, aberrant accumulation of mitochondrial-retained protein in muscle upon loss of LONP1 induces the activation of autophagy-lysosome degradation program of muscle loss. Overexpressing a mitochondrial-retained mutant ornithine transcarbamylase (ΔOTC), a known protein degraded by LONP1, in skeletal muscle induces mitochondrial dysfunction, autophagy activation, and cause muscle loss and weakness. Thus, these findings reveal a pivotal role of LONP1-dependent mitochondrial protein quality-control in safeguarding mitochondrial function and preserving skeletal muscle mass and strength, and unravel an intriguing link between mitochondrial protein quality and muscle mass maintenance during muscle disuse.

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Alterations in the gene expression profile in SKOV3 cells exposed to elaiophylin

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