Loss-of-Function CREB3L3 Variants in Patients With Severe Hypertriglyceridemia

Area of Science:

• Genetics
• Metabolic Disorders
• Molecular Biology

Background:

• Severe hypertriglyceridemia is influenced by common and rare genetic variants.
• Existing research focuses on canonical genes involved in triglyceride metabolism.
• Noncanonical pathways' roles in severe hypertriglyceridemia remain underexplored.

Purpose of the Study:

• To investigate the association of rare loss-of-function variants in noncanonical genes with severe hypertriglyceridemia.
• To identify novel genetic contributors to triglyceride metabolism beyond established pathways.

Main Methods:

• Targeted next-generation sequencing of 69 metabolism-related genes.
• Analysis of rare heterozygous loss-of-function variants in 265 severe hypertriglyceridemia patients and 477 controls.
• Focus on genes affecting indirect triglyceride metabolism pathways.

Main Results:

• Patients with severe hypertriglyceridemia were 20.2 times more likely to carry a rare loss-of-function variant in CREB3L3 compared to controls.
• A statistically significant association (P=0.03) was found between CREB3L3 variants and severe hypertriglyceridemia.
• CREB3L3 encodes a transcription factor regulating triglyceride metabolism.

Conclusions:

• Rare variants in the noncanonical gene CREB3L3 are a significant genetic determinant of severe hypertriglyceridemia.
• The study underscores the importance of considering secondary genes and pathways in the genetic architecture of complex lipid traits.
• CREB3L3 represents a novel target for understanding and potentially treating severe hypertriglyceridemia.