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Updated: Jun 19, 2026
Detection of a Circulating MicroRNA Custom Panel in Patients with Metastatic Colorectal Cancer
Published on: March 14, 2019
Pdcd4, a colon cancer prognostic that is regulated by a microRNA
1Dept. Experimental Surgery/Molecular Oncology of Solid Tumors (Collaboration Unit German Cancer Research Center-DKFZ-Heidelberg), Medical Faculty Mannheim, Ruprecht-Karls-University Heidelberg, Theodor-Kutzer-Ufer 1-3, 68167 Mannheim, Germany. heike.allgayer@umm.de
Abstract:
The novel tumor suppressor Pdcd4 inhibits neoplastic transformation, tumor progression and translation. Furthermore, we and others have recently shown that Pdcd4 suppresses invasion and intravasation, at least in part by suppressing expression of the invasion-related urokinase receptor (u-PAR) gene via the transcription factors Sp1/Sp3. Nevertheless, relatively little is known about mechanisms that regulate Pdcd4 expression in cancer. MicroRNAs (miRNAs) have been recently discovered and shown to be naturally occurring non-coding RNAs that control gene expression via specific sites within the 3'UTR of target miRNAs. This short review will focus on our recent finding that the microRNA miR-21 posttranscriptionally regulates Pdcd4, as well as invasion, intravasation, and metastasis. Furthermore, we will review the first translational and clinical results concerning the prognostic value of Pdcd4, in particular our own data that show Pdcd4 to be a novel and independent prognostic factor in colorectal cancer, and a potential supportive diagnostic tool for discriminating normal colonic tissues from benign adenomas and colorectal carcinomas.
Insights
The microRNA miR-21 regulates the tumor suppressor Pdcd4, impacting cancer invasion and metastasis. Pdcd4 shows prognostic value in colorectal cancer, aiding diagnosis.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Pdcd4 is a tumor suppressor inhibiting neoplastic transformation, invasion, and translation.
- Pdcd4 suppresses invasion by downregulating urokinase receptor (u-PAR) via Sp1/Sp3 transcription factors.
- Mechanisms regulating Pdcd4 expression in cancer remain largely unknown.
Purpose of the Study:
- To investigate the role of microRNA miR-21 in regulating Pdcd4.
- To examine the impact of miR-21 on cancer invasion, intravasation, and metastasis.
- To evaluate the prognostic and diagnostic value of Pdcd4 in colorectal cancer.
Main Methods:
- Review of recent findings on miR-21 regulation of Pdcd4.
- Analysis of translational and clinical data regarding Pdcd4.
- Assessment of Pdcd4 as a prognostic factor in colorectal cancer.
Main Results:
- MicroRNA miR-21 posttranscriptionally regulates Pdcd4.
- miR-21 influences cancer invasion, intravasation, and metastasis.
- Pdcd4 is a novel, independent prognostic factor in colorectal cancer.
Conclusions:
- Pdcd4 is regulated by miR-21, affecting key cancer progression steps.
- Pdcd4 serves as a valuable prognostic marker for colorectal cancer.
- Pdcd4 may assist in differentiating normal colonic tissue from cancerous growths.
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