[FILAGGRIN GENE NULL-MUTATIONS AND ATOPIC DISEASES].

Area of Science:

• Genetics
• Dermatology
• Immunology

Background:

• Filaggrin (FLG) null-mutations impair skin barrier function, increasing susceptibility to atopic disorders like atopic eczema/dermatitis syndrome (AEDS).
• Approximately 40 FLG null-mutation variants exist globally, with R501X and 2282del4 being common in Caucasians, showing a north-south gradient in Europe.
• FLG mutations are associated with AEDS, but their link to inhalant allergen sensitization, rhinitis, and asthma remains inconsistent.

Purpose of the Study:

• To investigate the frequency of FLG null-mutations in the Croatian population.
• To determine the etiological role of FLG null-mutations in atopy and atopic diseases within this population.

Main Methods:

• Genotyping of FLG null-mutations in the general Croatian population.
• Epidemiological analysis correlating FLG mutation status with atopic conditions.

Main Results:

• A low frequency (2.6%) of FLG null-mutations was observed in the Croatian general population.
• The study did not confirm FLG null-mutations as a significant etiological factor for atopy or atopic diseases in the studied Croatian cohort.

Conclusions:

• FLG null-mutations are infrequent in the Croatian population.
• The findings suggest that FLG null-mutations may not be a primary driver of atopy in this specific population, contrasting with findings in other regions.