HLA genes in Lamas Peruvian-Amazonian Amerindians

Area of Science:

• Population Genetics
• Human Leukocyte Antigen (HLA) studies
• Indigenous American Ancestry

Background:

• The Lamas Amerindians, descendants of the Chancas, settled in the Peruvian Amazon before the Spanish conquest.
• Previous studies indicate significant genetic diversity within Amerindian populations.

Purpose of the Study:

• To characterize the Human Leukocyte Antigen (HLA) profile of the Lamas Amerindians.
• To compare the Lamas HLA profile with other Amerindian populations.
• To investigate the potential origins and migration patterns of the Lamas people.

Main Methods:

• Human Leukocyte Antigen (HLA) typing was performed on the Lamas population.
• Haplotype analysis was conducted to identify unique genetic combinations.
• Phylogenetic analyses, including correspondence and neighbor-joining dendrograms, were used to infer population relationships.

Main Results:

• The Lamas HLA profile revealed a higher number of novel haplotypes compared to other Amerindian groups.
• Specific alleles, such as HLA-DRB1*0901 and HLA-B*48, were found at relatively high frequencies in the Lamas population.
• Genetic analyses suggested that the Lamas (Chancas) may have originated near Amazonian Indian groups before migrating to the Andean altiplano.

Conclusions:

• The Lamas Amerindians possess a distinct HLA genetic profile that differentiates them from other Amerindian populations.
• The presence of certain alleles suggests potential ancestral links to Southern Asian and Siberian/Eskimo populations.
• The findings support a migration model where the Lamas people originated in the Amazon region and later moved to the Andes.