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Liu T, Ma Q, Zhang Y, Wang X, Xu K, Yan K, Dong W, Fan Q, Zhang Y, Qiu X. Self-seeding circulating tumor cells promote the proliferation and metastasis of human osteosarcoma by upregulating interleukin-8. Cell Death Dis 2019; 10:575. [PMID: 31366916 PMCID: PMC6668432 DOI: 10.1038/s41419-019-1795-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Revised: 06/24/2019] [Accepted: 06/27/2019] [Indexed: 01/21/2023]
Abstract
Most circulating tumor cells (CTCs) die during the process of metastasis, but self-seeding CTCs can invade the primary tumor or form clinically meaningful metastases. This study aimed to evaluate the capacity of self-seeding CTCs to promote osteosarcoma growth and lung metastasis and to clarify the specific role of interleukin (IL)-8 in CTC self-seeding. We successfully isolated and cultured self-seeding CTCs through a self-seeding nude mouse model established using green fluorescent protein (GFP)-labeled F5M2 cells and found that self-seeding CTCs exhibit increased cellular proliferation, migration, and invasion in vitro, increased tumor growth and lung metastasis in mice, and increased IL-8 expression. Furthermore, suppressing IL-8 inhibited tumor growth and metastasis and reduced CTC seeding in primary tumors in vitro and in vivo. In osteosarcoma patients, IL-8 levels significantly correlated with the Enneking stage and metastasis. These findings demonstrate that self-seeding osteosarcoma CTCs can promote tumor growth and lung metastasis through IL-8. Their increased metastatic potential and elevated IL-8 expression suggest a novel strategy for future therapeutic interventions to prevent osteosarcoma progression and metastasis.
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Affiliation(s)
- Tao Liu
- State Key Laboratory of Cancer Biology, Biotechnology Center, School of Pharmacy, The Fourth Military Medical University, 169 Changle West Road, Xi'an, 710032, Shanxi, China.,Orthopaedic Oncology Institute, Tangdu Hospital, Fourth Military Medical University, 1 Xinsi Road, Xi'an, 710032, Shanxi, China
| | - Qiong Ma
- Orthopaedic Oncology Institute, Tangdu Hospital, Fourth Military Medical University, 1 Xinsi Road, Xi'an, 710032, Shanxi, China
| | - Yinglong Zhang
- Department of Orthopaedics, First Affiliated Hospital of PLA General Hospital, 100048, Beijing, China
| | - Xin Wang
- Rehabilitation Center of Lintong Sanatorium of PLA, No. 32 Huaqing Road, Lintong District, Xi'an, 710600, Shanxi, China
| | - Kui Xu
- Orthopaedic Oncology Institute, Tangdu Hospital, Fourth Military Medical University, 1 Xinsi Road, Xi'an, 710032, Shanxi, China
| | - Kang Yan
- Orthopaedic Oncology Institute, Tangdu Hospital, Fourth Military Medical University, 1 Xinsi Road, Xi'an, 710032, Shanxi, China
| | - Wengang Dong
- Orthopaedic Oncology Institute, Tangdu Hospital, Fourth Military Medical University, 1 Xinsi Road, Xi'an, 710032, Shanxi, China
| | - Qingyu Fan
- Orthopaedic Oncology Institute, Tangdu Hospital, Fourth Military Medical University, 1 Xinsi Road, Xi'an, 710032, Shanxi, China
| | - Yingqi Zhang
- State Key Laboratory of Cancer Biology, Biotechnology Center, School of Pharmacy, The Fourth Military Medical University, 169 Changle West Road, Xi'an, 710032, Shanxi, China.
| | - Xiuchun Qiu
- Orthopaedic Oncology Institute, Tangdu Hospital, Fourth Military Medical University, 1 Xinsi Road, Xi'an, 710032, Shanxi, China.
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