Abstract
Nestin is widely expressed in numerous tumors and has become a diagnostic and prognostic indicator. However, the exact mechanism by which nestin contributes to tumor malignancy remains poorly understood. Here, we found marked upregulation of nestin expression in highly proliferative and invasive gastrointestinal stromal tumor (GIST) specimens. Nestin knockdown in GIST cells reduced the proliferative and invasive activity owing to a decrease of mitochondrial intracellular reactive oxygen species (ROS) generation. Furthermore, nestin was co-localized with mitochondria, and knockdown of nestin increased mitochondrial elongation and influenced the mitochondrial function, including oxygen consumption rates, ATP generation and mitochondrial membrane potential and so on. In exploring the underlying mechanism, we demonstrated nestin knockdown inhibited the mitochondrial recruitment of Dynamin-related protein1 and induced the change of mitochondrial dynamics. Thus, nestin may have an important role in GIST malignancy by regulating mitochondrial dynamics and altering intracellular ROS levels. The findings provide new clues to reveal mechanisms by which nestin mediates the proliferation and invasion of GISTs.
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Acknowledgements
This work was supported by the National Basic Research Program of China (2012CBA01302); the National Natural Science Foundation of China (81425016, 81270646, 31171398); the Natural Science Foundation of Guangdong Province (S2013030013305, 2015A030312013); the Key Scientific and Technological Projects of Guangdong Province (2014B020226002, 2015B020226004, 2014B020228003, 2007A032100003); Key Scientific and Technological Program of Guangzhou City (201400000003-3, 201508020262, 201300000089, 2010U1-E00551); Guangdong Province Universities and Colleges Pearl River Scholar Funded Scheme (GDUPS, 2013).
Author contributions
JW, JC, YH, QK, BW, SW, YW, WL, and APX designed and performed experiments. XH analyzed results. JW, JC, YH, CL and APX assembled results and wrote the paper. TW, WS and WL provided tools, patient specimens and edited the manuscript. All authors participated in critical revision of the manuscript for important intellectual content.
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Wang, J., Cai, J., Huang, Y. et al. Nestin regulates proliferation and invasion of gastrointestinal stromal tumor cells by altering mitochondrial dynamics. Oncogene 35, 3139–3150 (2016). https://doi.org/10.1038/onc.2015.370
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DOI: https://doi.org/10.1038/onc.2015.370
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