Loss of TET2 Tips the Scales Toward Tumorigenesis

Brian C Capell1

  • 1Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA; Department of Genetics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA; Penn Epigenetics Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA; Abramson Cancer Center, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.

Insights

Ten-eleven translocation (TET) enzymes regulate DNA methylation, crucial for cell differentiation and cancer prevention. This study reveals TET2

Area of Science:

  • Epigenetics
  • Dermatology
  • Cancer Biology

Background:

  • DNA methylation is vital for cellular differentiation and cancer.
  • DNA methyltransferases are well-studied in skin biology.
  • Ten-eleven translocation (TET) demethylase roles remain unclear in epidermal biology.

Purpose of the Study:

  • Investigate the function of TET demethylase enzymes in skin.
  • Determine the role of TET2 in squamous cell carcinoma (SCC) development.
  • Elucidate the regulation of 5-hydroxymethylcytosine by TET2 in SCC prevention.

Main Methods:

  • Analysis of TET2 expression and function in epidermal models.
  • Assessment of 5-hydroxymethylcytosine levels in relation to TET2 activity.
  • Evaluation of TET2's impact on squamous cell carcinoma development.

Main Results:

  • TET2 plays a significant role in regulating 5-hydroxymethylcytosine.
  • Evidence suggests a tumor-suppressive function for TET2 in the epidermis.
  • TET2 activity is linked to the prevention of squamous cell carcinomas.

Conclusions:

  • TET2 is a key regulator in preventing squamous cell carcinomas.
  • Understanding TET2's epigenetic role offers new avenues for cancer prevention strategies.
  • Further research into TET demethylases is warranted for skin cancer biology.

Related Concept Videos

Loss of Tumor Suppressor Gene Functions01:12

Loss of Tumor Suppressor Gene Functions

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.
When the tumor suppressor genes develop mutations or are lost, cells start growing out of control, leading to cancer. However, a single functional copy of the tumor suppressor gene is enough for the cells to maintain their normal functions and cell...
5.2K
Cancer-Critical Genes II: Tumor Suppressor Genes01:05

Cancer-Critical Genes II: Tumor Suppressor Genes

Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
8.3K
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...
4.7K
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
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...
3.8K