NINJURIN1 single nucleotide polymorphism and nerve damage in leprosy

Area of Science:

• Genetics
• Neurology
• Infectious Diseases

Background:

• Leprosy, caused by Mycobacterium leprae, is a leading cause of neuropathy in developing nations.
• NINJURIN1 is a cell adhesion molecule crucial for Schwann cell repair after peripheral nerve injury.
• A specific single nucleotide polymorphism (SNP) in NINJ1, asp110ala, involves an adenine to cytosine transversion, altering the protein at position 110.

Purpose of the Study:

• To investigate the association between the NINJ1 gene polymorphism (asp110ala) and neural impairment in leprosy patients.
• To determine the clinical significance of this SNP in the context of leprosy progression and nerve damage.

Main Methods:

• A polymerase chain reaction/restriction fragment length polymorphism (PCR-RFLP) method was employed.
• The asp110ala SNP was analyzed in 218 leprosy patients and 244 non-leprosy controls.
• Genotype and allele frequencies were compared between groups.

Main Results:

• No significant differences in asp110ala SNP frequency were found between leprosy patients and controls, or between different leprosy clinical forms.
• The C allele (ala110) was significantly increased in leprosy patients with nerve impairment (p=0.0379).
• Patients with the CC genotype (ala/ala) showed a higher risk (OR=4.21) of nerve disability compared to those with the AA genotype (asp/asp) (OR=0.69).

Conclusions:

• The C allele (ala110) of the NINJ1 gene is associated with nerve damage in leprosy patients.
• The asp110ala polymorphism may serve as a valuable prognostic marker for predicting nerve damage susceptibility in leprosy.