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Related Concept Videos

MicroRNAs01:22

MicroRNAs

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MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
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Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
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Related Experiment Video

Updated: May 9, 2025

Detection of a Circulating MicroRNA Custom Panel in Patients with Metastatic Colorectal Cancer
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Clinical Value and Regulatory Mechanism of miR-767-5p in Colorectal Cancer.

Ping Lin1, Xiuju Qin2, Caiyun Yi3

  • 1Department of General Surgery, Minimally Invasive Surgery Center, Second People's Hospital of Hunan Province (Hunan Brain Hospital), Changsha, China.

Folia Biologica
|May 1, 2025
PubMed
Summary

MicroRNA-767-5p (miR-767-5p) is downregulated in colorectal cancer (CRC), acting as a tumor suppressor. Its overexpression inhibits CRC progression by reducing nuclear factor I A (NFIA) levels.

Keywords:
NFIAcolorectal cancerinteractionmiR-767-5p

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Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Colorectal cancer (CRC) has a poor prognosis, leading to increased mortality.
  • MicroRNAs (miRNAs) are implicated in the regulation of various cancers, including CRC.

Purpose of the Study:

  • To investigate the clinical significance and regulatory mechanisms of miR-767-5p in colorectal cancer.
  • To evaluate miR-767-5p as a potential prognostic biomarker for CRC.

Main Methods:

  • Examined miR-767-5p expression in CRC tissues and cells.
  • Utilized Kaplan-Meier curves and multivariate COX regression for prognostic analysis.
  • Conducted in vitro experiments to elucidate miR-767-5p's regulatory role and its interaction with NFIA via dual-luciferase reporter assay.

Main Results:

  • miR-767-5p expression was significantly downregulated in CRC tissues and cells.
  • Tumor differentiation, TNM, LNM, and miR-767-5p were identified as independent prognostic factors for poor CRC prognosis.
  • Overexpression of miR-767-5p suppressed CRC cell proliferation, migration, and invasion by inhibiting NFIA expression, an effect reversible by NFIA overexpression.

Conclusions:

  • miR-767-5p functions as a tumor suppressor in colorectal cancer.
  • miR-767-5p inhibits CRC progression by suppressing NFIA expression.
  • miR-767-5p holds potential as a prognostic biomarker and therapeutic target for CRC.