Folate, homocysteine and the cardiac neural crest

Area of Science:

• Developmental Biology
• Nutritional Neuroscience
• Cardiovascular Research

Background:

• Congenital heart defects (CHD) are the most prevalent birth defects globally.
• Perigestational folate supplementation (PFS) is the primary intervention for CHD prevention.
• Cardiac neural crest (CNC) development is crucial for normal heart formation and is sensitive to folate and homocysteine levels.

Purpose of the Study:

• To review the roles of folate and homocysteine in cardiac neural crest (CNC) development.
• To explore mechanisms by which folate influences CNC development, including one-carbon metabolism and gene regulation.
• To examine the detrimental effects of hyperhomocysteinemia on CNC development.

Main Methods:

• Literature review focusing on the molecular and cellular mechanisms of folate and homocysteine in embryonic heart development.
• Analysis of existing research on the impact of folate and homocysteine on cardiac neural crest cell (CNCC) function.
• Synthesis of evidence linking folate metabolism and homocysteine levels to CHD etiology.

Main Results:

• Folate is essential for CNC development, supporting critical processes like mitosis and gene methylation.
• Hyperhomocysteinemia disrupts CNC development through oxidative stress, impaired gene methylation, protein homocysteinylation, and NMDA receptor binding.
• The folate receptor plays a direct role in regulating gene expression relevant to CNC development.

Conclusions:

• Understanding the intricate roles of folate and homocysteine in CNC development is key to CHD prevention.
• Targeted research advancements beyond PFS could lead to novel strategies for preventing CHD.
• Interventions aimed at optimizing folate status and mitigating homocysteine effects hold promise for reducing the incidence of congenital heart defects.