The Proinflammatory Role of ANGPTL8 R59W Variant in Modulating Inflammation through NF-κB Signaling Pathway under...

Area of Science:

• Biochemistry
• Genetics
• Immunology

Background:

• Angiopoietin-like protein 8 (ANGPTL8) regulates lipid metabolism and inflammation.
• A specific ANGPTL8 variant (R59W) is linked to altered lipid profiles and glucose levels.
• The R59W variant's impact on inflammation requires further investigation.

Purpose of the Study:

• To investigate the impact of the ANGPTL8 R59W variant on inflammatory activity.
• To explore the association between the R59W variant and key inflammatory markers.
• To elucidate the molecular mechanisms underlying the variant's effect on the NF-κB pathway.

Main Methods:

• Genotyping of the ANGPTL8 R59W variant in Arab cohorts.
• Measurement of plasma ANGPTL8 and inflammatory markers (TNFα, IL7).
• In vitro studies using HepG2 cells to assess NF-κB pathway activation and ANGPTL8 binding dynamics via luciferase assays and structural modeling.

Main Results:

• The ANGPTL8 R59W variant is associated with elevated circulatory levels of TNFα and IL7.
• In vitro studies showed increased NF-κB pathway phosphorylation and activity with the R59W variant.
• Structural modeling supported the observed increase in NF-κB activity due to the R59W variant's altered binding.

Conclusions:

• The ANGPTL8 R59W variant is linked to increased inflammation, characterized by higher TNFα, IL7, and NF-κB p65 activity.
• Weak transient binding of the ANGPTL8 R59W variant contributes to its regulatory role in the NF-κB pathway and inflammation.