Unmasking Kabuki syndrome.

Area of Science:

• Genetics
• Developmental Biology
• Clinical Medicine

Background:

• Kabuki syndrome (KS) is a congenital disorder characterized by distinctive facial features, developmental delay, and organ malformations.
• De novo dominant mutations in the KMT2D (also known as MLL2) gene are identified as the primary genetic cause of KS.
• Previous studies highlight KMT2D as the major gene involved, but also suggest genetic heterogeneity in KS etiology.

Purpose of the Study:

• To consolidate current clinical and molecular genetic findings related to Kabuki syndrome.
• To establish correlations between specific KMT2D genotypes and observed phenotypes in KS patients.
• To propose an optimized diagnostic pathway for individuals suspected of having Kabuki syndrome.

Main Methods:

• Literature review of clinical case studies and genetic analyses of Kabuki syndrome patients.
• Analysis of mutation screening data to confirm KMT2D as the principal causative gene.
• Systematic compilation of genotype-phenotype data to identify patterns and correlations.

Main Results:

• KMT2D mutations are confirmed as the leading cause of Kabuki syndrome, explaining a significant proportion of cases.
• Evidence for genetic heterogeneity is noted, suggesting other genes may contribute to KS in a subset of patients.
• Genotype-phenotype correlations are being elucidated, aiding in understanding disease variability.

Conclusions:

• KMT2D mutations are central to Kabuki syndrome pathogenesis.
• Understanding genotype-phenotype relationships is crucial for accurate diagnosis and patient management.
• A strategic diagnostic approach integrating clinical and molecular findings is recommended for suspected KS cases.