Cited by 74Cellular transport and secretionMechanisms of cancer metastasisExtracellular vesicles in disease

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Secretory RAB GTPase 3C modulates IL6-STAT3 pathway to promote colon cancer metastasis and is associated with poor prognosis

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Abstract

BACKGROUND: RAB GTPases are important in the regulation of membrane trafficking and cell movement. Recently, exocytic RABs have received increasing attention in cancer research. However, the functional roles of exocytic RABs in colorectal carcinogenesis remain to be elucidated. METHODS: Immunohistochemistry analysis of a microarray containing 215 colorectal adenocarcinoma tissues was used to identify the association between exocytic RABs and patient prognosis. Complementary functional RAB3C overexpression and knockdown experiments were performed. The molecular mechanism of RAB3C in inducing colon cancer cell metastasis was determined. RESULTS: High RAB3C expression in patients was found to be significantly associated with advanced pathological stage, distant metastasis and poor prognosis. Multivariate analyses showed that high RAB3C expression was an independent prognostic marker in overall (P = 0.001) and disease-free survival (P < 0.001). Furthermore, our experimental results showed an increase in the migration and invasion ability of RAB3C-overexpressing colon cancer cells and increased metastatic nodules in a mouse metastasis model. The effect of RAB3C-overexpressing cell-conditioned medium was found to significantly promote the migration ability of parental colon cancer cells, thus suggesting that the promotion of migration is exocytosis dependent. Upregulation of other exocytic RABs was also seen in RAB3C-overexpressing cells. Through microarray and proteomics analyses, increased production of multiple cytokines was observed in RAB3C-overexpressing cell lines, and the IL-6 pathway was the top pathway whose members exhibited gene expression changes after RAB3C overexpression, according to Ingenuity Pathway Analysis. Blocking IL-6 with IL-6 antibody treatment or IL-6 knockdown significantly inhibited the migration potential of RAB3C-overexpressing colon cancer cells. In addition, IL-6 was found to induce STAT3 phosphorylation in RAB3C-overexpressing colon cancer cells, thus promoting migration. Ruxolitinib, a JAK2 inhibitor, was found to significantly inhibit RAB3C-induced colon cancer cell migration. CONCLUSIONS: Our study revealed that RAB3C overexpression promotes tumor metastasis and is associated with poor prognosis in colorectal cancer, through modulating the ability of cancer cells to release IL-6 through exocytosis and activate the JAK2-STAT3 signaling pathway. These results further suggest that inhibition of STAT3 phosphorylation in the RAB3C-IL-6-STAT3 axis by using Ruxolitinib may be a new therapeutic strategy to combat metastatic colon cancers.

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Crossref · 10.1186/s12943-017-0687-7

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  • Elevated expression of RAB3C promotes in vivo migration, invasion, and metastasis of colorectal cancer.

    “Elevated expression of RAB3C promotes in vivo migration, invasion, and metastasis of colorectal cancer while RAB3D induced breast cancer cell invasion by activating Akt/GSK-3β/Snail pathway [115,116].”

    From Insights of Endocytosis Signaling in Health and Disease (2023) · cites this paper as [115]

    The Background (page not provided) distinguishes increased migration and invasion in vitro from metastasis-promoting ability in vivo. The Results report cell migration and invasion assays and increased metastatic nodules in mice. The source therefore supports in vivo metastasis, but not the claim that migration and invasion were demonstrated in vivo. (LLM, conf=0.90)

    Experimental — accuracy not yet measured
  • RAB3D induces breast cancer cell invasion by activating Akt/GSK-3β/Snail pathway.

    “Elevated expression of RAB3C promotes in vivo migration, invasion, and metastasis of colorectal cancer while RAB3D induced breast cancer cell invasion by activating Akt/GSK-3β/Snail pathway [115,116].”

    From Insights of Endocytosis Signaling in Health and Disease (2023) · cites this paper as [115]

    The Discussion (page unavailable) mentions RAB3D in breast cancer but says only that endogenous RAB3D expression was not correlated with tumor progression. A search for RAB3D and the Akt/GSK-3β/Snail pathway found no passage in our copy addressing whether RAB3D induces breast cancer cell invasion through that pathway. The paper’s invasion and metastasis findings concern RAB3C in colorectal cancer. (LLM, conf=0.76)

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Metadata

Authors
Chang, Y.-C., Su, C.-Y., Chen, M.-H., Chen, W.-S., Chen, C.-L., & Hsiao, M.
Affiliations
  • Genomics Research Center, Academia Sinica (TW)
  • Taipei Veterans General Hospital (TW)
  • Taipei Medical University Hospital (TW)
  • Kaohsiung Medical University (TW)
Corresponding author
  • Chen, Wei-Shone
  • Chen, Chi-Long
  • Hsiao, Michael
Venue
Molecular Cancer
Published
2017-08-07
Volume
16
Issue
1
Pages
135-135
ISSN
1476-4598 (ISSN-L)
OpenAlex
W2742632885
Cited by
74
References
2
Citations by year
2026: 1 · 2025: 6 · 2024: 9 · 2023: 10 · 2022: 6 · 2021: 12 · 2020: 14 · 2019: 9 · 2018: 6 · 2017: 1
FWCI
4.38
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Molecular Cancer (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
Ministry of Science and Technology, Taiwan (MOST 104-0210-01-09-02, MOST 105-0210-01-13-01, MOST 106-0210-01-15-02)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mechanisms of cancer metastasis
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Extracellular vesicles in disease
Keywords
Rab3C, colorectal cancer, colon cancer metastasis, interleukin-6, STAT3 signaling, JAK2 inhibition, ruxolitinib, exocytosis, tumor cell migration and invasion, prognostic factors, conditioned medium, membrane trafficking, disease-free survival
MeSH terms
Animals, Cell Movement, Colonic Neoplasms, Humans, Immunohistochemistry, Male, Neoplasm Invasiveness, Prognosis, Interleukin-6, rab3 GTP-Binding Proteins, Cell Line, Tumor, STAT3 Transcription Factor, Mice, Heterografts

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