Related Experiment Video
Updated: Oct 3, 2025
Efficient Purification and LC-MS/MS-based Assay Development for Ten-Eleven Translocation-2 5-Methylcytosine Dioxygenase
Published on: October 15, 2018
Dissecting TET2 Regulatory Networks in Blood Differentiation and Cancer
Aleksey Lazarenkov1, José Luis Sardina1
1Epigenetic Control of Haematopoiesis Group, Josep Carreras Leukaemia Research Institute, 08916 Badalona, Spain.
Abstract:
Cytosine methylation (5mC) of CpG is the major epigenetic modification of mammalian DNA, playing essential roles during development and cancer. Although DNA methylation is generally associated with transcriptional repression, its role in gene regulation during cell fate decisions remains poorly understood. DNA demethylation can be either passive or active when initiated by TET dioxygenases. During active demethylation, transcription factors (TFs) recruit TET enzymes (TET1, 2, and 3) to specific gene regulatory regions to first catalyze the oxidation of 5mC to 5-hydroxymethylcytosine (5hmC) and subsequently to higher oxidized cytosine derivatives. Only TET2 is frequently mutated in the hematopoietic system from the three TET family members. These mutations initially lead to the hematopoietic stem cells (HSCs) compartment expansion, eventually evolving to give rise to a wide range of blood malignancies. This review focuses on recent advances in characterizing the main TET2-mediated molecular mechanisms that activate aberrant transcriptional programs in blood cancer onset and development. In addition, we discuss some of the key outstanding questions in the field.
Insights
TET2 mutations in blood cancer disrupt DNA methylation, altering gene expression and expanding hematopoietic stem cells. Understanding these TET2-mediated mechanisms is crucial for blood cancer development and treatment.
Area of Science:
- Epigenetics
- Molecular Biology
- Hematology
Background:
- Cytosine methylation (5mC) is a key epigenetic regulator in mammals, influencing development and cancer.
- DNA demethylation, particularly active demethylation by TET enzymes, is critical for gene regulation during cell fate decisions.
- TET2 is the most frequently mutated TET family member in the hematopoietic system.
Purpose of the Study:
- To review recent advances in understanding TET2-mediated molecular mechanisms in blood cancer.
- To elucidate how TET2 mutations activate aberrant transcriptional programs in hematologic malignancies.
- To identify key outstanding questions in the field of TET2 and blood cancer.
Main Methods:
- Review of recent scientific literature on TET2, DNA methylation, and blood cancers.
- Focus on molecular mechanisms of TET2-mediated gene regulation and its dysregulation.
- Analysis of the role of TET2 mutations in hematopoietic stem cell expansion and malignancy development.
Main Results:
- TET2 mutations lead to hematopoietic stem cell (HSC) expansion.
- These mutations contribute to the development of various blood malignancies.
- TET2-mediated epigenetic alterations drive aberrant transcription in blood cancers.
Conclusions:
- TET2 plays a critical role in maintaining normal hematopoiesis and preventing blood cancers.
- Understanding TET2's function is vital for deciphering blood cancer pathogenesis.
- Further research into TET2-mediated mechanisms may reveal new therapeutic strategies.
More Related Videos
12:44Identification of Key Factors Regulating Self-renewal and Differentiation in EML Hematopoietic Precursor Cells by RNA-sequencing Analysis
Published on: November 11, 2014
10:59Conditional Knockdown of Gene Expression in Cancer Cell Lines to Study the Recruitment of Monocytes/Macrophages to the Tumor Microenvironment
Published on: November 23, 2017
Related Concept Videos
01:05Cancer-Critical Genes II: Tumor Suppressor Genes
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...
01:21Lineage Commitment
01:24Regulation of Angiogenesis and Blood Supply
01:01Regulation of Hematopoietic Stem Cells
02:23Master Transcription Regulators