The Importance of mir-491-5p in Various Cancers

Mahsa Fakeri1, Seyed Masoud Armandzadeh1, Samad Sadigh Olyaei1

  • 1Department of Animal Biology, Faculty of Natural Sciences, University of Tabriz, Tabriz, Iran.

Current Molecular Medicine
|September 12, 2022
PubMed

Insights

MicroRNAs (miRNAs) regulate gene expression and cellular processes. This review focuses on miR-491-5p, a microRNA that inhibits cancer cell growth, invasion, and metastasis, offering therapeutic potential.

Area of Science:

  • Molecular Biology
  • Genetics
  • Cancer Research

Background:

  • MicroRNAs (miRNAs) are key regulators of gene expression, influencing both physiological and pathological processes.
  • Dysregulation and mutations in miRNAs are implicated in cancer development, with some acting as oncogenes or tumor suppressors.
  • Metastasis, the spread of cancer cells, significantly complicates treatment and indicates advanced disease.

Approach:

  • This review synthesizes current experimental and clinical studies on the role of miR-491-5p in various cancers.
  • Investigates the molecular mechanisms by which miR-491-5p affects cancer cell behavior, including growth, invasion, and metastasis.
  • Examines the potential of miR-491-5p as a therapeutic target or biomarker in oncology.

Key Points:

  • miR-491-5p demonstrates significant tumor-suppressive activity.
  • It inhibits cancer cell proliferation, invasion, and migration.
  • Enhanced expression of miR-491-5p is linked to reduced cancer metastasis.

Conclusions:

  • miR-491-5p plays a crucial role in suppressing cancer progression.
  • Its ability to inhibit invasion and metastasis highlights its potential as an anti-cancer agent.
  • Further research into miR-491-5p modulation could lead to novel cancer therapies.

Related Concept Videos

MicroRNAs01:22

MicroRNAs

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...
3.1K
Abnormal Proliferation02:23

Abnormal Proliferation

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...
4.6K
lncRNA - Long Non-coding RNAs02:39

lncRNA - Long Non-coding RNAs

In humans, more than 80% of the genome gets transcribed. However, only around 2% of the genome codes for proteins. The remaining part produces non-coding RNAs which includes ribosomal RNAs, transfer RNAs, telomerase RNAs, and regulatory RNAs, among other types. A large number of regulatory non-coding RNAs have been classified into two groups depending upon their length – small non-coding RNAs, such as microRNA, which are less than 200 nucleotides in length, and long non-coding RNA...
8.8K
mTOR Signaling and Cancer Progression03:03

mTOR Signaling and Cancer Progression

The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
3.9K
The Retinoblastoma Gene01:20

The Retinoblastoma Gene

Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
4.2K
Induced Pluripotent Stem Cells01:06

Induced Pluripotent Stem Cells

Stem cells are undifferentiated cells that divide and produce different cell types. Ordinarily, cells that have differentiated into a specific cell type are terminally differentiated; however, scientists have found a way to reprogram these mature cells so that they dedifferentiate and return to an unspecialized, proliferative state. These cells are pluripotent like embryonic stem cells—able to produce all cell types—and are called induced pluripotent stem cells (iPSCs).
Somatic...
4.3K