Phenotypic Diversity of Marfan Syndrome

Area of Science:

• Genetics and Molecular Biology
• Cardiovascular Medicine
• Ophthalmology
• Skeletal Biology

Background:

• Marfan syndrome (MFS) is an inherited connective tissue disorder caused by mutations in the FBN1 gene.
• It affects the cardiovascular system, eyes, and skeletal structure, with aortic aneurysm and dissection being major causes of mortality.
• Clinical presentation and disease severity in MFS exhibit significant variability, even among individuals with the same FBN1 mutation.

Purpose of the Study:

• To provide a comprehensive overview of the phenotypic diversity observed in Marfan syndrome.
• To explore the underlying genetic and molecular factors contributing to this variability.
• To highlight the need for improved understanding to enhance diagnostic and prognostic capabilities.

Main Methods:

• This review synthesizes existing literature on Marfan syndrome.
• It examines studies investigating genotype-phenotype correlations.
• It discusses potential mechanisms driving phenotypic heterogeneity.

Main Results:

• The relationship between FBN1 mutations and specific clinical manifestations is complex and not fully elucidated.
• Factors beyond FBN1 mutations, such as modifier genes and environmental influences, likely contribute to phenotypic variability.
• Current genetic testing, while crucial for diagnosis, has limitations in predicting disease progression and outcomes.

Conclusions:

• Phenotypic variability in Marfan syndrome poses challenges for accurate prognosis and risk stratification.
• Further research into the mechanisms underlying MFS heterogeneity is essential for personalized medicine approaches.
• Enhanced understanding will improve genetic counseling and patient management strategies for Marfan syndrome.