Related Experiment Video
Updated: Jun 12, 2025

06:27
Accelerated Type 1 Diabetes Induction in Mice by Adoptive Transfer of Diabetogenic CD4+ T Cells
Published on: May 6, 2013
16.7K
Retrotransposons and Diabetes Mellitus
Andromachi Katsanou1,2, Charilaos Kostoulas3, Evangelos Liberopoulos4
1Department of Endocrinology, University of Ioannina, 45110 Ioannina, Greece.
Epigenomes
|September 23, 2024
Summary
Retrotransposons like Alu and LINE-1 are key to genome stability. Their hypomethylation is linked to diseases, including diabetes mellitus, suggesting a role in pathogenesis.
Area of Science:
- Genetics
- Epigenetics
- Molecular Biology
Background:
- Retrotransposons, such as Alu and LINE-1, are abundant in the human genome and can cause genetic alterations.
- Hypomethylation of these elements is linked to genomic instability in various diseases, including cancer and neurodegenerative conditions.
- Diabetes mellitus (DM) research is increasingly exploring retrotransposon associations.
Purpose of the Study:
- To review current knowledge on epigenetic alterations in Alu and LINE-1 retrotransposons.
- To explore the potential role of these retrotransposons as epigenetic markers in DM pathogenesis.
- To understand their significance as a surrogate for global DNA methylation levels.
Main Methods:
- Literature review of studies on retrotransposon methylation.
- Analysis of epigenetic alterations in Alu and LINE-1 elements.
- Synthesis of current research on DM and retrotransposon involvement.
Main Results:
- Alu and LINE-1 hypomethylation is associated with global hypomethylation and genomic instability.
- These retrotransposons may serve as biomarkers for cellular senescence and genomic instability.
- Sparse data currently exists on their specific functional role in DM.
Conclusions:
- Epigenetic alterations in Alu and LINE-1 retrotransposons are significant in disease pathogenesis.
- Quantifying their methylation status could indicate global DNA methylation levels.
- Further research is needed to elucidate the precise role of retrotransposons in DM.
Related Concept Videos
Non-LTR Retrotransposons
11.4K
As the name suggests, non-LTR retrotransposons lack the long terminal repeats characteristic of the LTR retrotransposons. Additionally, both LTR and non-LTR retrotransposons use distinct mechanisms of mobilization. Non-LTR retrotransposons are further divided into two classes - Long interspersed nuclear elements (LINEs) and short interspersed nuclear elements (SINEs), both of which occur abundantly in most mammals, including humans. Some of the active non-LTR retrotransposons in humans are L1...
11.4K
Diabetes Mellitus: Overview and Type I Subtype
2.5K
Diabetes mellitus is a chronic metabolic disorder characterized by high blood glucose levels due to inadequate insulin production, insulin resistance, or both. The condition affects millions worldwide and can significantly impact their health and quality of life.
Type 1 diabetes is an autoimmune disease in which the immune system mistakenly attacks and destroys the insulin-producing beta cells in the pancreas. As a result, the body is unable to produce sufficient insulin, and individuals with...
Type 1 diabetes is an autoimmune disease in which the immune system mistakenly attacks and destroys the insulin-producing beta cells in the pancreas. As a result, the body is unable to produce sufficient insulin, and individuals with...
2.5K
LTR Retrotransposons
17.4K
LTR retrotransposons are class I transposable elements with long terminal repeats flanking an internal coding region. These elements are less abundant in mammals compared to other class I transposable elements. About 8 percent of human genomic DNA comprises LTR retrotransposons. Some of the common examples of LTR retrotransposons are Ty elements in yeast and Copia elements in Drosophila.
The internal coding region of LTR retrotransposons and their mechanism of transposition closely resembles a...
The internal coding region of LTR retrotransposons and their mechanism of transposition closely resembles a...
17.4K
DNA-only Transposons
14.4K
DNA-only transposons are called autonomous transposons since they code for the enzyme transposase that is required for the transposition mechanism. Insertion of transposons can alter gene functions in multiple ways. They can mutate the gene, alter gene expression by introducing a novel promoter or insulator sequence, introduce new splice sites, and change the mRNA transcripts produced, or remodel chromatin structure.
The donor site from where the transposon is excised is either degraded or...
The donor site from where the transposon is excised is either degraded or...
14.4K
Diabetes Mellitus: Type 2 and Gestational
2.2K
Type 2 diabetes, characterized by insulin resistance, arises when the insulin receptors on cells lose responsiveness to insulin, diminishing the cell's capacity to take up glucose, resulting in elevated blood glucose levels. To receive a diagnosis of Type 2 diabetes, a series of blood glucose tests are necessary to assess whether the blood glucose falls within normal parameters. If the result is out of the normal range, a patient may be diagnosed as prediabetic or diabetic, depending on the...
2.2K
Overview of Transposition and Recombination
15.3K
Transposons make up a significant part of genomes of various organisms. Therefore, it is believed that transposition played a major evolutionary role in speciation by changing genome sizes and modifying gene expression patterns. For example, in bacteria, transposition can lead to conferring antibiotic resistance. Movement of transposable elements within the genetic pool of pathogenic bacteria can aid in transfer of antibiotic-resistant genetic elements. In eukaryotes, transposons can carry out...
15.3K

