Two Novel COH1 Mutations in an Italian Patient with Cohen Syndrome

Area of Science:

• Genetics
• Rare Diseases
• Molecular Biology

Background:

• Cohen syndrome (CS) is an autosomal recessive disorder.
• CS is characterized by intellectual disability, hypotonia, joint hyperlaxity, severe myopia, facial dysmorphisms, and sometimes neutropenia.
• Mutations in the COH1 gene are the known cause of CS.

Purpose of the Study:

• To investigate the genetic basis of Cohen syndrome in an Italian patient and family.
• To identify novel mutations in the COH1 gene.
• To improve the understanding of genotype-phenotype correlations in CS.

Main Methods:

• Genetic analysis of an Italian patient and family with Cohen syndrome.
• Identification and characterization of mutations in the COH1 gene.
• Correlation of identified mutations with the patient's clinical phenotype.

Main Results:

• Two novel mutations in the COH1 gene were identified in the patient.
• An intronic mutation (c.8697-9A>G) creating a new splice site.
• A duplication mutation (c.10156dupA) leading to a premature stop codon.

Conclusions:

• The identified compound heterozygous mutations in the COH1 gene explain the patient's CS phenotype.
• These findings contribute to the knowledge of genotype-phenotype correlations in Cohen syndrome.
• Further research into COH1 mutations can aid in diagnosing and understanding CS.