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Coagulation factor XIIIA subtypes in Brazilian Indians
G Arnold1, J Kömpf, F M Salzano
1Institut für Anthropologie und Humangenetik der Universität Tübingen, Deutschland.
Human Heredity
|May 1, 1996
Summary
Genetic analysis of coagulation factor XIII subtypes in Brazilian Indian groups revealed no significant tribal differences. Notably, the FXIII*1A allele, common in Asian populations, was found to be nearly absent in these indigenous communities.
Area of Science:
- Population genetics
- Human genetics
- Biochemistry
Background:
- Coagulation Factor XIII (FXIII) plays a crucial role in hemostasis.
- Genetic variations in FXIII subtypes can influence hemostatic function and population distribution.
- Previous studies have documented FXIII subtype frequencies in various global populations.
Purpose of the Study:
- To investigate the genetic diversity of coagulation factor XIIIA subtypes within and between two Brazilian Indian groups.
- To compare the observed FXIII subtype frequencies with those found in other ethnic and geographic populations.
Main Methods:
- Blood samples were collected from 340 individuals across seven localities.
- Coagulation factor XIIIA subtypes were analyzed using established genetic typing methods.
- Statistical analyses were performed to assess inter- and intra-tribal variations.
Main Results:
- No significant inter- or intra-tribal differences in coagulation factor XIIIA subtypes were detected among the studied Brazilian Indian groups.
- The FXIII*1A allele, prevalent in Asiatic Mongoloid populations (e.g., Japanese at 27%), was found to be nearly absent in the Macushi and Icana River Indians.
- This suggests a distinct genetic profile for FXIII subtypes in these South American indigenous populations.
Conclusions:
- The coagulation factor XIII subtype distribution in these Brazilian Indian groups is genetically homogeneous.
- The near absence of the FXIII*1A allele highlights significant genetic divergence from Asian populations.
- Further research is warranted to explore the evolutionary and functional implications of these FXIII genetic patterns in indigenous South Americans.