Transcriptome analysis in various cell lines exposed to nitric oxide.

Area of Science:

• Biochemistry
• Molecular Biology
• Toxicology

Background:

• Nitric oxide (NO) is a signaling molecule with physiological roles.
• Excessive or chronic NO acts as an inflammatory mediator and can cause toxic effects.
• NO-induced S-nitrosylation inhibits DNA methyltransferases, potentially altering gene expression and contributing to disease.

Purpose of the Study:

• To investigate the effects of chronic nitric oxide (NO) exposure on the transcriptome.
• To understand how NO influences gene expression in different cell types.
• To elucidate the role of NO in the pathogenesis of NO-associated inflammatory diseases.

Main Methods:

• Transcriptome analysis was performed on A549, AGS, HEK293T, and SW48 cells.
• Cells were exposed to 100 μM nitric oxide (NO) for 48 hours.
• Gene ontology and gene set enrichment analyses were utilized to interpret gene expression changes.

Main Results:

• Differentially expressed genes in response to NO exposure were cell-specific.
• Gene ontology analysis revealed upregulation of genes related to cell adhesion and migration in several cell lines.
• Gene set enrichment analysis indicated that NO stimulated inflammation-related gene expression across various cell lines.

Conclusions:

• Chronic NO exposure significantly alters cellular transcriptomes in a cell-specific manner.
• NO exposure upregulates genes associated with cell adhesion, migration, and inflammation.
• These findings contribute to understanding the molecular mechanisms underlying NO-associated inflammatory diseases.