Properdin factor B polymorphism in continental Italy and Sardinia

Area of Science:

• Population genetics
• Immunogenetics
• Human evolutionary studies

Background:

• The genetic landscape of European populations is diverse.
• Understanding Human Leukocyte Antigen (HLA) and properdin factor B (Bf) polymorphisms is crucial for population genetics.

Purpose of the Study:

• To investigate HLA and Bf gene frequencies in Continental Italy, Sicily, and Sardinia.
• To compare these frequencies with other European populations.
• To analyze HLA:Bf gametic associations to infer ethnic differentiation.

Main Methods:

• Typing of HLA and Bf polymorphisms in 882 individuals from Continental Italy/Sicily and 139 from Sardinia.
• Calculation of gene frequencies for Bf.
• Analysis of HLA:Bf gametic associations.

Main Results:

• Bf gene frequencies in Continental Italy/Sicily are intermediate among European populations.
• Sardinians show a unique Bf pattern, similar to French Basques, with the highest F1 gene frequency.
• HLA:Bf associations confirm distinct ethnic backgrounds for Italians and Sardinians.

Conclusions:

• Italian and Sardinian populations possess distinct genetic profiles.
• Sardinian genetics show a unique affinity with Basque populations.
• HLA and Bf polymorphisms serve as valuable markers for tracing population history and ethnic differentiation.