Decoding liver injury: A regulatory role for histone modifications

Wenfang Tian1, Yong Xu1

  • 1Laboratory of Cardiovascular Disease and Molecular Intervention, Department of Pathophysiology, Nanjing Medical University, Nanjing, Jiangsu 210029, China.

Insights

The liver, a vital organ, faces numerous stressors leading to injury. Epigenetic mechanisms, particularly histone modifications, are crucial in regulating gene expression during liver injury and disease.

Area of Science:

  • Hepatology
  • Epigenetics
  • Molecular Biology

Background:

  • The liver performs critical metabolic, endocrine, immune, and detoxification functions.
  • It is susceptible to various injuries from nutritional, humoral, viral, and chemical stressors.
  • Liver injury involves significant morphological, functional, and transcriptional changes.

Purpose of the Study:

  • To summarize recent advances in understanding epigenetic regulation of liver injury.
  • To focus on the specific role of histone modifications in this process.
  • To highlight the importance of epigenetics for developing interventional strategies.

Main Methods:

  • Review of current scientific literature on epigenetic regulation in liver injury.
  • Focus on studies investigating histone modifications and their impact.
  • Analysis of how epigenetic machinery influences transcriptional events during injury.

Main Results:

  • Epigenetic machinery, including histone/DNA modifying enzymes and non-coding RNAs, is integral to liver injury.
  • Histone modifications play a key role in programming transcriptional events during liver injury.
  • Understanding these epigenetic dynamics is essential for therapeutic interventions.

Conclusions:

  • Epigenetic regulation, especially histone modifications, is a critical determinant of liver injury outcomes.
  • Further research into liver epigenetics can unlock novel therapeutic targets.
  • This review contributes to the understanding of epigenetics in disease pathogenesis.

Related Concept Videos

Histone Modification02:32

Histone Modification

The histone proteins have a flexible N-terminal tail extending out from the nucleosome. These histone tails are often subjected to post-translational modifications such as acetylation, methylation, phosphorylation, and ubiquitination. Particular combinations of these modifications form “histone codes” that influence the chromatin folding and tissue-specific gene expression.
Acetylation
The enzyme histone acetyltransferase adds acetyl group to the histones. Another enzyme, histone...
17.6K
Histone Modification02:32

Histone Modification

5.0K
Liver Regeneration01:24

Liver Regeneration

The liver is an important organ in vertebrates that plays an essential role in metabolism. It is also responsible for storing and redistributing nutrients such as carbohydrates, fats, and vitamins in the body. Additionally, the liver releases bile salts which are critical for digesting food and eliminating toxic metabolites from the body.
Cells of Liver
The liver comprises four major types of cells— hepatocytes, stellate, Kupffer, and sinusoidal endothelial cells. The hepatocytes are...
5.3K
Spreading of Chromatin Modifications02:25

Spreading of Chromatin Modifications

The histone proteins in the nucleosomes are post-translationally modified (PTM) to increase or decrease access to DNA. The commonly observed PTMs are methylation, acetylation, phosphorylation, and ubiquitination of lysine amino acids in the histone H3 tail region. These histone modifications have specific meaning for the cell. Hence, they are called "histone code". The protein complex involved in histone modification is termed as "reader-writer" complex.
Writers
The writer...
10.1K
Cell Specific Gene Expression01:58

Cell Specific Gene Expression

Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...
17.4K
Inheritance of Chromatin Structures03:17

Inheritance of Chromatin Structures

Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying...
7.9K