J Cancer 2021; 12(10):2893-2902. doi:10.7150/jca.48906 This issue Cite

Research Paper

Changes in phospholipid metabolism in exosomes of hormone-sensitive and hormone-resistant prostate cancer cells

Xianlin Yi1, You Li2,3, XiaoGang Hu4, FuBing Wang4✉, Tiangang Liu2,5,6✉

1. Department of Urology, The Affiliated Cancer Hospital of Guangxi Medical University & Guangxi Cancer Research Institute, Nanning 530021,China.
2. Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, PR China.
3. Life science institute of East China Normal University, Shanghai 200241, P.R. China.
4. Department of Laboratory Medicine, Zhongnan Hospital of Wuhan University, Wuhan 430071, P.R. China.
5. Wuhan infectious diseases and cancer research center, Chinese Academy of Medical Sciences, Wuhan 430071, P.R. China.
6. Hubei Engineering Laboratory for Synthetic Microbiology, Wuhan Institute of Biotechnology, Wuhan 430075, PR China.

Citation:
Yi X, Li Y, Hu X, Wang F, Liu T. Changes in phospholipid metabolism in exosomes of hormone-sensitive and hormone-resistant prostate cancer cells. J Cancer 2021; 12(10):2893-2902. doi:10.7150/jca.48906. https://www.jcancer.org/v12p2893.htm
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Abstract

Graphic abstract

Background: To explore the changes in lipids in exosomes of hormone-sensitive and hormone-resistant prostate cancer cells and develop an inexpensive and rapid technique for screening lipid-based biomarkers of prostate cancer.

Methods: Exosomes were extracted from LnCap, PC3 and DU-145 cells, and their lipid composition was analyzed quantitatively using high-throughput mass spectrometry. Exosomes released by LnCap prostate cancer cells were also purified using a modified procedure based on polyethylene glycol (PEG) precipitation.

Results: Exosomes extracted from LnCap cells contained higher proportions of phosphatidyl choline, phosphatidyl ethanolamine and phosphatidyl inositol lipids than whole LnCap cells. Lysophosphatidylcholine, a harmful intermediate product of phosphatidylcholine metabolism in vivo, was not found in LnCap cells but in exosomes. Phospholipids were different in exosomes from LnCap, PC3 and DU-145 prostate cancer cells. The main lipid pathways involved, i.e., glycerophospholipid metabolism, autophagy, and ferroptosis pathways, were also different in these cells. Exosomes isolated by this modified PEG precipitation technique were similar in purity to those obtained using a commercial kit.

Conclusions: This study demonstrates that phosphatidylcholine and its harmful product lysophosphatidylcholine may play important roles in hormone-sensitive prostate cancer. Phospholipid exosome metabolism was changed in hormone-sensitive and hormone-resistant prostate cancer cells. The LPC, lipid pathway of autophagy and ferroptosis may act as therapeutic targets. The possibility of purifying prostate cancer cell exosomes using modified PEG precipitation is suitable for cancer screening.

Keywords: lipidomics, exosome, prostate cancer


Citation styles

APA
Yi, X., Li, Y., Hu, X., Wang, F., Liu, T. (2021). Changes in phospholipid metabolism in exosomes of hormone-sensitive and hormone-resistant prostate cancer cells. Journal of Cancer, 12(10), 2893-2902. https://doi.org/10.7150/jca.48906.

ACS
Yi, X.; Li, Y.; Hu, X.; Wang, F.; Liu, T. Changes in phospholipid metabolism in exosomes of hormone-sensitive and hormone-resistant prostate cancer cells. J. Cancer 2021, 12 (10), 2893-2902. DOI: 10.7150/jca.48906.

NLM
Yi X, Li Y, Hu X, Wang F, Liu T. Changes in phospholipid metabolism in exosomes of hormone-sensitive and hormone-resistant prostate cancer cells. J Cancer 2021; 12(10):2893-2902. doi:10.7150/jca.48906. https://www.jcancer.org/v12p2893.htm

CSE
Yi X, Li Y, Hu X, Wang F, Liu T. 2021. Changes in phospholipid metabolism in exosomes of hormone-sensitive and hormone-resistant prostate cancer cells. J Cancer. 12(10):2893-2902.

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