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Reduced adipogenesis after lung tumor exosomes priming in human mesenchymal stem cells via TGFβ signaling pathway

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Abstract

A key feature of cancer cachexia is the loss of adipose tissue, mainly due to increased lipolysis and an impairment of adipogenesis. Recent findings have shown that cancer exosomes promoted lipolysis in adipose tissue. However, effects of cancer exosomes on adipogenesis were not reported. In this study, we found that lung cancer exosomes could be internalized by human adipose tissue-derived mesenchymal stem cells (hAD-MSCs) and significantly inhibited hAD-MSC adipogenesis as demonstrated by Oil Red O staining and decreased expression of adipogenic-specific genes. Specifically, TGFβ signaling pathway was demonstrated to be involved in the inhibitive effects of lung cancer exosomes on hAD-MSC adipogenesis. Additionally, TGFβ was detected in A549 exosomes. Herein, this study reports that the effect of lung cancer cell exosomes on hAD-MSC adipogenic differentiation was mediated by TGFβ signaling pathway and suggests the involvement of cancer exosomes in weight loss of cancer cachexia.

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Acknowledgements

This study was supported by National Natural Science Foundation of China (81370879), PUMC Youth Fund and the Fundamental Research Funds for the Central Universities (3332013141).

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    Authors and Affiliations

    1. Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Peking Union Medical College Hospital, Center of Excellence in Tissue Engineering Chinese Academy of Medical Sciences, Dongdan santiao 5#, Beijing, 100005, People’s Republic of China

      Shihua Wang, Xiaoxia Li, Meiqian Xu, Jing Wang & Robert Chunhua Zhao

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    1. Shihua Wang
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    2. Xiaoxia Li
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    3. Meiqian Xu
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    4. Jing Wang
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    Correspondence to Jing Wang or Robert Chunhua Zhao.

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    The authors have declared no conflict of interest.

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    Shihua Wang and Xiaoxia Li authors have contributed equally to this work.

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    Wang, S., Li, X., Xu, M. et al. Reduced adipogenesis after lung tumor exosomes priming in human mesenchymal stem cells via TGFβ signaling pathway. Mol Cell Biochem 435, 59–66 (2017). https://doi.org/10.1007/s11010-017-3056-3

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