Related Experiment Video
Updated: Jan 21, 2026
04:42
Developing a Rat Model for Bipolar Disorder
Published on: May 2, 2025
1.3K
Differentially methylated regions in bipolar disorder and suicide
Marie E Gaine1, Fayaz Seifuddin2, Sarven Sabunciyan3,4
1Department of Psychiatry, University of Iowa Carver College of Medicine, Iowa City, Iowa.
Summary
DNA methylation patterns are altered in bipolar disorder (BD) and suicide. A specific gene region, ARHGEF38, showed hypomethylation in suicide cases, suggesting a role in BD and suicide risk.
Area of Science:
- Genetics
- Neuroscience
- Epigenetics
Background:
- DNA methylation, the addition of a methyl group to cytosine-guanine dinucleotides (CpG), regulates gene expression.
- Aberrant DNA methylation is linked to psychiatric disorders like bipolar disorder (BD) and suicide.
Purpose of the Study:
- To investigate genome-wide DNA methylation patterns in individuals with BD, including those who died by suicide.
- To identify differentially methylated regions (DMRs) associated with BD and suicide.
Main Methods:
- Whole-genome DNA methylation analysis using Methyl-Seq on samples from 50 BD individuals and 31 controls.
- Comparison of methylation status between BD subjects (suicide vs. other causes) and nonpsychiatric controls.
- Pathway analysis using Ingenuity Pathway Analysis (IPA) to identify enriched biological pathways.
Main Results:
- One DMR in the ARHGEF38 gene was significantly hypomethylated in BD subjects who died by suicide compared to controls.
- This finding was validated by pyrosequencing and was more pronounced in males.
- IPA revealed associations between nominally significant DMRs and pathways like axonal guidance, calcium signaling, and opioid signaling.
Conclusions:
- DNA methylation alterations are implicated in the risk for BD and suicide.
- The hypomethylation in ARHGEF38 warrants further investigation for its functional role.
- Additional research is needed to confirm these epigenetic associations and their consequences.
Related Concept Videos
01:30Bipolar Disorder
652
Bipolar disorder is a chronic mental health condition marked by significant mood fluctuations, including episodes of mania and depression. Elevated energy levels, heightened mood or irritability, impulsive behavior, reduced sleep needs, rapid speech, racing thoughts, inflated self-esteem, and distractibility characterize mania. Individuals with bipolar disorder often alternate between depressive and manic states, with periods of emotional stability lasting an average of six months to a year.
652
01:22Bipolar Junction Transistor
1.5K
Bipolar Junction Transistors (BJTs) are essential elements in electronic circuits, playing a crucial role in the functionality of amplifiers, memories, and microprocessors. These transistors can be designed as NPN or PNP based on their doping patterns. They consist of three layers: the emitter, base, and collector. The configuration of these layers and their respective doping levels—with N-type or P-type impurities—define the transistor's type and its operational...
1.5K
02:40The Eukaryotic Promoter Region
18.7K
The eukaryotic promoter region is a segment of DNA located upstream of a gene. It contains an RNA polymerase binding site, a transcription start site, and several cis-regulatory sequences. The proximal promoter region is located in the vicinity of the gene and has cis-regulatory sequences and the core promoter. The core promoter is the binding site for RNA polymerase and is usually located between -35 and +35 nucleotides from the transcription start site. The distal promoter regions are...
18.7K
01:03IR Frequency Region: Fingerprint Region
1.9K
IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the...
1.9K
02:18Intrinsically Disordered Proteins
19.2K
Intrinsically disordered proteins are a group of proteins that do not fold into specific three-dimensional structures. Their structural flexibility allows them to complement ordered proteins to perform functions that are inaccessible to rigid structures. They are more common in eukaryotes than prokaryotes and may either be exclusively intrinsically disordered or hybrid proteins, consisting of a mix of ordered and disordered regions. The absence of a rigid structure in these proteins can be...
19.2K
01:17Region of Convergence
895
The z-transform is a powerful mathematical tool used in the analysis of discrete-time signals and systems. It is a crucial tool in the analysis of discrete-time systems, but its convergence is limited to specific values of the complex variable z. This range of values, known as the Region of Convergence (ROC), is fundamental in determining the behavior and stability of a system or signal. The ROC defines the region in the complex plane where the z-transform converges, which can take various...
895