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Updated: Dec 22, 2025
In Vivo Inhibition of MicroRNA to Decrease Tumor Growth in Mice
Published on: August 23, 2019
miR-485-3p suppresses colorectal cancer via targeting TPX2
Background:
Colorectal cancer (CRC), is the third most common cancer type. MicroRNAs and their roles in cancer progression have gained considerable attention in the scientific community. miR-485-3p has been identified to be abnormally expressed in different types of cancer, but its expression level, biological function, and underlying pathways are still unclear in CRC. Targeting Protein for Xenopus kinesin-like protein 2 (TPX2) is a nuclear protein which plays vital roles in cancer progression and mitotic spindle assembly. TPX2 is overexpressed in various malignancies and has been predicted as an indirect target of miR-485-3p. This study aims to investigate the miR-485-3p and TPX2 expression level, their potential correlation, and underlying molecules like P53 and P21 in forty-one pairs of colorectal cancer tissues compared to matched non-cancerous ones.
Materials And Methods:
We used forty-one pairs of CRC fresh tissue samples and their adjacent normal ones for RNA extraction. After cDNA synthesis, the expression level of miR-485-3p, TPX2, P53 and P21 were determined by Real-time PCR.
Results And Conclusions:
The results revealed that miR-485-3p was significantly downregulated and TPX2 was highly upregulated in CRC tissues. Moreover, miR-485-3p was negatively correlated with TPX2 expression and positively correlated with P21 expression. We present miR-485-3p as a suppressor for colorectal cancer (Tab. 2, Fig. 8, Ref. 44).
Insights
MicroRNA-485-3p (miR-485-3p) acts as a tumor suppressor in colorectal cancer (CRC). This study found miR-485-3p is downregulated while TPX2 is upregulated in CRC, suggesting a new therapeutic target.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Colorectal cancer (CRC) is a leading cause of cancer death worldwide.
- MicroRNAs (miRNAs) are critical regulators of gene expression implicated in cancer.
- The role of miR-485-3p in CRC remains largely uncharacterized, despite its altered expression in other cancers.
Purpose of the Study:
- To investigate the expression levels of miR-485-3p and Targeting Protein for Xenopus kinesin-like protein 2 (TPX2) in CRC.
- To explore the correlation between miR-485-3p, TPX2, and key regulatory molecules like P53 and P21 in CRC.
- To elucidate the potential role of miR-485-3p as a tumor suppressor in colorectal cancer.
Main Methods:
- Utilized 41 pairs of fresh CRC tissues and adjacent non-cancerous tissues.
- Performed RNA extraction and cDNA synthesis.
- Quantified the expression levels of miR-485-3p, TPX2, P53, and P21 using Real-time PCR.
Main Results:
- miR-485-3p was significantly downregulated in CRC tissues compared to normal tissues.
- TPX2 expression was markedly upregulated in CRC tissues.
- A negative correlation was observed between miR-485-3p and TPX2 expression, and a positive correlation between miR-485-3p and P21 expression.
Conclusions:
- miR-485-3p functions as a tumor suppressor in colorectal cancer.
- The downregulation of miR-485-3p and upregulation of TPX2 may contribute to CRC progression.
- miR-485-3p and TPX2 represent potential diagnostic and therapeutic targets for CRC.
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