CRISPR Activator Approaches to Study Endogenous Androglobin Gene Regulation

Area of Science:

• Biochemistry
• Genetics
• Molecular Biology

Background:

• Androglobin (ADGB) is a recently identified mammalian globin with a unique structure and heme-binding properties.
• ADGB expression is typically restricted to specific spermatogenesis stages but also found in cells with motile cilia/flagella.
• Studying ADGB in standard mammalian cell models is challenging due to its limited endogenous expression.

Purpose of the Study:

• To develop a method for studying Androglobin (ADGB) gene expression in non-expressing mammalian cells.
• To utilize CRISPR activation (CRISPRa) technology to induce endogenous ADGB expression.
• To validate regulatory DNA elements in the ADGB promoter and enhancer regions.

Main Methods:

• CRISPR activation (CRISPRa) technology was employed to target the ADGB gene promoter.
• CRISPRa was used to induce endogenous ADGB expression in HEK293T, MCF-7, and HeLa cell lines.
• The method was applied to investigate putative regulatory DNA elements.

Main Results:

• CRISPRa successfully induced endogenous ADGB gene expression from its native promoter in HEK293T, MCF-7, and HeLa cells.
• This approach enabled the study of ADGB regulation in cell types not typically expressing the protein.
• The methodology proved effective for validating regulatory elements in promoter and enhancer regions of the ADGB gene.

Conclusions:

• CRISPR activation is a viable technique to study the gene expression of Androglobin (ADGB) in diverse mammalian cell models.
• This method facilitates the investigation of ADGB's complex gene regulation and the identification of its regulatory DNA elements.