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STC2 promotes anoikis resistance by modulating TGIF1 mRNA stability in colorectal cancer
Fan Hu1, Qiuming He2, Zheyu Ding3
1Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China.
Background:
Stanniocalcin-2 (STC2), a glycosylated protein originally identified in the endocrine glands of fish, plays multiple biological roles in cancer. However, its functional significance and molecular mechanisms in colorectal cancer (CRC) remain unclear.
Methods:
Bioinformatic analyses and CRC tissue specimens were used to determine STC2 expression and its prognostic value. The biological effects of STC2 on CRC cells were assessed using flow cytometry and live/dead staining assays. The underlying mechanisms were further explored by RNA sequencing, RNA immunoprecipitation (RIP), and RNA stability assays.
Results:
STC2 was significantly upregulated in CRC tissues and cell lines, and its high expression was associated with poor prognosis in CRC patients. Functional experiments demonstrated that STC2 enhanced CRC cell resistance to anoikis by upregulating TGIF1 expression. Mechanistically, STC2 bound to TGIF1 mRNA and stabilized it by inhibiting its degradation.
Conclusion:
Our findings suggest that STC2 promotes anoikis resistance in CRC by regulating TGIF1 mRNA stability. STC2 may serve as a potential therapeutic target and prognostic biomarker for colorectal cancer.
Insights
Stanniocalcin-2 (STC2) promotes colorectal cancer (CRC) cell survival by stabilizing TGIF1 mRNA, enhancing resistance to anoikis. STC2 may be a therapeutic target and prognostic biomarker for CRC.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Research
Background:
- Stanniocalcin-2 (STC2) is a protein with known roles in various cancers.
- Its specific function and mechanisms in colorectal cancer (CRC) are not well understood.
Purpose of the Study:
- To investigate the role and molecular mechanisms of STC2 in colorectal cancer.
- To evaluate STC2 as a potential prognostic biomarker for CRC.
Main Methods:
- Bioinformatic analysis of CRC tissues and cell lines.
- Functional assays including flow cytometry and live/dead staining.
- Molecular mechanism studies using RNA sequencing, RIP, and RNA stability assays.
Main Results:
- STC2 expression is significantly upregulated in CRC tissues and cell lines.
- High STC2 expression correlates with poor prognosis in CRC patients.
- STC2 enhances CRC cell anoikis resistance by upregulating and stabilizing TGIF1 mRNA.
Conclusions:
- STC2 promotes anoikis resistance in CRC by enhancing TGIF1 mRNA stability.
- STC2 presents potential as a therapeutic target and prognostic biomarker for colorectal cancer.
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