Cited by 70Mesenchymal stem cell researchChemokine receptors and signalingCancer Cells and Metastasis

CXCR1/Akt signaling activation induced by mesenchymal stem cell-derived IL-8 promotes osteosarcoma cell anoikis resistance and pulmonary metastasis

Open access
Du, Lin, Han, Xiu-guo, Tu, Bing, Wang, Min-qi, Qiao, Han, Zhang, Shu-hong, Fan, Qi-ming, Tang, Ting-ting·2018·Cell Death & Disease

Abstract

The loss of appropriate cell adhesion normally induces apoptosis via a process termed anoikis. The aim of this study was to investigate the effects of mesenchymal stem cells (MSCs) in the cancer microenvironment on the anoikis resistance and pulmonary metastasis of osteosarcoma (OS) cells, and to evaluate the critical role of the interleukin (IL)-8/C-X-C chemokine receptor (CXCR) 1/Akt-signaling pathway in these processes. Metastatic OS subtype cells, which did or did not interact with MSC-conditioned medium (MSC-CM) in vitro, were isolated from the pulmonary site and named Saos2-lung-M. Both MSC-CM and IL-8 treatment increased the anoikis resistance of Saos2 cells in vitro. Moreover, exogenous MSC-CM promoted the survival and metastasis of Saos2 cells in nude mice. Saos2-lung-M cells were more malignant and resistant to anoikis than parental cells. MSCs secreted IL-8, thereby protecting OS cells from anoikis. Blocking the IL-8/CXCR1/Akt pathway via CXCR1 knockdown inhibited the pulmonary metastasis of Saos2-lung-MSCs and prolonged the survival of tumor-bearing mice. In conclusion, MSCs enhanced OS cell resistance to anoikis and pulmonary metastasis via regulation of the IL-8/CXCR1/Akt pathway. These findings suggest that MSCs can "select for" OS cells with high metastatic potential in vivo, and highlight CXCR1 as a key target in the regulation of pulmonary metastasis of OS cells.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1038/s41419-018-0745-0

Cites

41 of 41 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Exogenous MSC-CM promote the survival and metastasis of Saos2 cells in nude mice.

    “Also, MSC-CM treatment increases the anoikis resistance of Saos2 cells in vitro, whereas exogenous MSC-CM promote the survival and metastasis of Saos2 cells in nude mice [124].”

    From Mesenchymal Stem/Stromal Cells: Immunomodulatory and Bone Regeneration Potential after Tumor Excision in Osteosarcoma Patients (2023) · cites this paper as [124]

    The Results section, “MSC-conditioned medium (CM) protected OS cells from anoikis in vitro and in vivo” (page unavailable), reports that MSC-CM-treated Saos2 cells survived longer in mice. The in-vivo metastasis experiment in “The distribution of MSCs in OS-bearing nude mice and MSC enhancement of OS growth and metastasis” (page unavailable) reports enhanced metastasis after injecting MSCs, rather than establishing that exogenous MSC-CM itself promoted metastasis. (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • MSC-CM treatment increases the anoikis resistance of Saos2 cells in vitro.

    “Also, MSC-CM treatment increases the anoikis resistance of Saos2 cells in vitro, whereas exogenous MSC-CM promote the survival and metastasis of Saos2 cells in nude mice [124].”

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Du, L., Han, X.-G., Tu, B., Wang, M.-Q., Qiao, H., Zhang, S.-H., Fan, Q.-M., & Tang, T.-T.
Affiliations
Shanghai Jiao Tong University (CN)
Venue
Cell Death & Disease
Published
2018-06-18
Volume
9
Issue
7
Pages
714-714
ISSN
2041-4889 (ISSN-L)
OpenAlex
W2807923155
Cited by
70
References
41
Citations by year
2026: 3 · 2025: 3 · 2024: 11 · 2023: 11 · 2022: 9 · 2021: 13 · 2020: 8 · 2019: 7 · 2018: 5
FWCI
4.68
Type
journal article
Language
en
Open access
Locations
  • Cell Death and Disease (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, other-oa)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
National Natural Science Foundation of China (81672205, 81502326)
Topics
  • Health Sciences › Medicine › Genetics › Mesenchymal stem cell research
  • Health Sciences › Medicine › Oncology › Chemokine receptors and signaling
  • Health Sciences › Medicine › Oncology › Cancer Cells and Metastasis
Keywords
osteosarcoma, mesenchymal stem cells, anoikis resistance, lung metastasis, interleukin-8, CXCR1, Akt signaling, tumor microenvironment, tumor cell survival, Saos-2 cells
MeSH terms
Animals, Bone Neoplasms, Cells, Cultured, Humans, Lung Neoplasms, Male, Mice, Inbred BALB C, Mice, Nude, Osteosarcoma, Signal Transduction, Gene Expression Regulation, Neoplastic, Interleukin-8, Culture Media, Conditioned, Disease Progression, Receptors, Interleukin-8A, Anoikis, Proto-Oncogene Proteins c-akt, Mice, Tumor Microenvironment, Mesenchymal Stem Cells

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review