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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 ends...
Replicative Cell Senescence02:15

Replicative Cell Senescence

Replicative cell senescence is a property of cells that allows them to divide a finite number of times throughout the organism's lifespan while preventing excessive proliferation. Replicative senescence is associated with the gradual loss of the telomere — short, repetitive DNA sequences found at the end of the chromosomes. Telomeres are bound by a group of proteins to form a protective cap on the ends of chromosomes. Embryonic stem cells express telomerase — an enzyme that adds the telomeric...
Cancer Stem Cells and Tumor Maintenance02:40

Cancer Stem Cells and Tumor Maintenance

Early diagnosis and treatment can often cure cancer. However, even with treatment, residual cells called cancer stem cells (CSC) might remain, often causing tumor recurrence. These cancer stem cells possess the potential for self-renewal and multi-lineage differentiation and are often responsible for the therapeutic resistance displayed in most cancers.
Cancer stem cells are thought to originate from tissue-specific normal stem cells or progenitor cells. The normal stem cells usually reside in...
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...
Cancer Stem Cells and Tumor Maintenance02:40

Cancer Stem Cells and Tumor Maintenance

Early diagnosis and treatment can often cure cancer. However, even with treatment, residual cells called cancer stem cells (CSC) might remain, often causing tumor recurrence. These cancer stem cells possess the potential for self-renewal and multi-lineage differentiation and are often responsible for the therapeutic resistance displayed in most cancers.
Cancer stem cells are thought to originate from tissue-specific normal stem cells or progenitor cells. The normal stem cells usually reside in...
Distinctive Features of Adult Stem Cells vs Cancer Stem Cells01:18

Distinctive Features of Adult Stem Cells vs Cancer Stem Cells

A stem cell is an unspecialized cell that can divide without limit as needed and can, under specific conditions, differentiate into specialized cells.
Adult stem cells
Adult stem cells are tissue-specific; hence, they divide to develop the tissue from which they originate. One type of adult stem cell is the epithelial stem cell, which gives rise to the keratinocytes in the multiple layers of epithelial cells in the epidermis of the skin. Adult bone marrow has three distinct types of stem cells:...

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Related Experiment Video

Updated: Jul 9, 2026

Mammosphere Formation Assay from Human Breast Cancer Tissues and Cell Lines
10:51

Mammosphere Formation Assay from Human Breast Cancer Tissues and Cell Lines

Published on: March 22, 2015

miRNAs, cancer, and stem cell division.

Carlo M Croce1, George A Calin

  • 1Department of Molecular Virology, Immunology, and Medical Genetics and Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio 43210, USA.

Cell
|July 13, 2005
PubMed
Summary

MicroRNAs (miRNAs) regulate key cellular processes. Aberrant miRNA gene expression is implicated in cancer development and progression, as highlighted in recent studies.

Area of Science:

  • Molecular Biology
  • Genetics
  • Oncology

Background:

  • MicroRNAs (miRNAs) are small non-coding RNAs that play crucial roles in post-transcriptional gene regulation.
  • These molecules are involved in fundamental cellular processes including development, proliferation, apoptosis, and stress responses.

Purpose of the Study:

  • To investigate the role of microRNA gene expression in the context of cancer initiation and progression.
  • To highlight recent findings linking specific miRNA alterations to tumorigenesis.

Main Methods:

  • Analysis of gene expression data.
  • Bioinformatic analysis of miRNA regulatory networks.
  • Review of recent high-impact publications in reputable journals.

Main Results:

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Analysis of Combinatorial miRNA Treatments to Regulate Cell Cycle and Angiogenesis
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Analysis of Combinatorial miRNA Treatments to Regulate Cell Cycle and Angiogenesis

Published on: March 30, 2019

MicroRNA Amplification and Recognition through Locked-nucleic-acid In situ Hybridization as a Novel Detection and Quantification Method
09:06

MicroRNA Amplification and Recognition through Locked-nucleic-acid In situ Hybridization as a Novel Detection and Quantification Method

Published on: October 7, 2025

Related Experiment Videos

Last Updated: Jul 9, 2026

Mammosphere Formation Assay from Human Breast Cancer Tissues and Cell Lines
10:51

Mammosphere Formation Assay from Human Breast Cancer Tissues and Cell Lines

Published on: March 22, 2015

Analysis of Combinatorial miRNA Treatments to Regulate Cell Cycle and Angiogenesis
11:44

Analysis of Combinatorial miRNA Treatments to Regulate Cell Cycle and Angiogenesis

Published on: March 30, 2019

MicroRNA Amplification and Recognition through Locked-nucleic-acid In situ Hybridization as a Novel Detection and Quantification Method
09:06

MicroRNA Amplification and Recognition through Locked-nucleic-acid In situ Hybridization as a Novel Detection and Quantification Method

Published on: October 7, 2025

  • Specific microRNA genes exhibit altered expression patterns in cancerous tissues.
  • These alterations are associated with the dysregulation of genes controlling cell growth and survival.
  • Recent research underscores the causal link between miRNA dysregulation and cancer development.

Conclusions:

  • MicroRNA dysregulation is a significant factor in cancer initiation and progression.
  • Targeting specific miRNAs presents a potential therapeutic avenue for cancer treatment.
  • Further research into miRNA-cancer interactions is warranted.