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Bjørnetrø T, Steffensen LA, Vestad B, Brusletto BS, Olstad OK, Trøseid AM, Aass HCD, Haug KBF, Llorente A, Bøe SO, Lång A, Samiappan R, Redalen KR, Øvstebø R, Ree AH. Uptake of circulating extracellular vesicles from rectal cancer patients and differential responses by human monocyte cultures. FEBS Open Bio 2021; 11:724-740. [PMID: 33512765 PMCID: PMC7931235 DOI: 10.1002/2211-5463.13098] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 01/13/2021] [Accepted: 01/26/2021] [Indexed: 12/20/2022] Open
Abstract
Extracellular vesicles (EVs) released by tumor cells can directly or indirectly modulate the phenotype and function of the immune cells of the microenvironment locally or at distant sites. The uptake of circulating EVs and the responses by human monocytes in vitro may provide new insights into the underlying biology of the invasive and metastatic processes in cancer. Although a mixed population of vesicles is obtained with most isolation techniques, we predominantly isolated exosomes (small EVs) and microvesicles (medium EVs) from the SW480 colorectal cancer cell line (established from a primary adenocarcinoma of the colon) by sequential centrifugation and ultrafiltration, and plasma EVs were prepared from 22 patients with rectal adenoma polyps or invasive adenocarcinoma by size‐exclusion chromatography. The EVs were thoroughly characterized. The uptake of SW480 EVs was analyzed, and small SW480 EVs were observed to be more potent than medium SW480 EVs in inducing monocyte secretion of cytokines. The plasma EVs were also internalized by monocytes; however, their cytokine‐releasing potency was lower than that of the cell line‐derived vesicles. The transcriptional changes in the monocytes highlighted differences between adenoma and adenocarcinoma patient EVs in their ability to regulate biological functions, whereas the most intriguing changes were found in monocytes receiving EVs from patients with metastatic compared with localized cancer.
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Affiliation(s)
- Tonje Bjørnetrø
- Department of Oncology, Akershus University Hospital, Lørenskog, Norway.,Institute of Clinical Medicine, University of Oslo, Norway
| | - Lilly Alice Steffensen
- The Blood Cell Research Group, Department of Medical Biochemistry, Oslo University Hospital, Norway
| | - Beate Vestad
- The Blood Cell Research Group, Department of Medical Biochemistry, Oslo University Hospital, Norway
| | - Berit Sletbakk Brusletto
- The Blood Cell Research Group, Department of Medical Biochemistry, Oslo University Hospital, Norway
| | - Ole Kristoffer Olstad
- The Blood Cell Research Group, Department of Medical Biochemistry, Oslo University Hospital, Norway
| | - Anne-Marie Trøseid
- The Blood Cell Research Group, Department of Medical Biochemistry, Oslo University Hospital, Norway
| | | | - Kari Bente Foss Haug
- The Blood Cell Research Group, Department of Medical Biochemistry, Oslo University Hospital, Norway
| | - Alicia Llorente
- Department of Molecular Cell Biology, Institute of Cancer Research, Oslo University Hospital, Norway
| | - Stig Ove Bøe
- Department of Medical Biochemistry, Oslo University Hospital, Norway
| | - Anna Lång
- Department of Medical Biochemistry, Oslo University Hospital, Norway
| | | | - Kathrine Røe Redalen
- Department of Oncology, Akershus University Hospital, Lørenskog, Norway.,Department of Physics, Norwegian University of Science and Technology, Trondheim, Norway
| | - Reidun Øvstebø
- The Blood Cell Research Group, Department of Medical Biochemistry, Oslo University Hospital, Norway
| | - Anne Hansen Ree
- Department of Oncology, Akershus University Hospital, Lørenskog, Norway.,Institute of Clinical Medicine, University of Oslo, Norway
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