Genetics of atrioventricular canal defects

Area of Science:

• Cardiovascular Genetics
• Developmental Biology
• Medical Genetics

Background:

• Atrioventricular canal defect (AVCD) is a frequent congenital heart defect (CHD), comprising 7.4% of all cardiac malformations.
• AVCD presents heterogeneous phenotypes, appearing in genetic syndromes or as an isolated defect, with familial recurrence patterns observed.
• Genetic factors are implicated in AVCD, necessitating molecular investigation due to its complex embryological origins.

Purpose of the Study:

• To review recent advancements in understanding the molecular etiology of AVCD.
• To explore the genetic underpinnings of AVCD in both syndromic and non-syndromic cases.
• To highlight the role of genetic sequencing in elucidating AVCD's molecular heterogeneity.

Main Methods:

• Literature review of studies on AVCD genetics.
• Analysis of Next-Generation Sequencing (NGS) data in AVCD patients.
• Examination of genetic syndromes associated with AVCD phenotypes.

Main Results:

• Multiple genes involved in cardiogenesis are mutated in AVCD patients.
• NGS techniques are effective in identifying the molecular heterogeneity of AVCD.
• Genetic variations contribute to both syndromic and isolated forms of AVCD.

Conclusions:

• The molecular basis of AVCD is complex, involving numerous genes crucial for heart development.
• Genetic analysis, particularly NGS, is vital for diagnosing AVCD and understanding its recurrence.
• Further research into AVCD genetics will improve clinical management and genetic counseling.