Serum and red cell enzyme polymorphisms in six Amerindian tribes

Area of Science:

• Population genetics
• Human genetics
• Biochemistry

Background:

• Amerindian populations exhibit diverse genetic profiles.
• Inbreeding can influence genetic variation within isolated populations.
• Red cell and serum enzymes are useful genetic markers.

Purpose of the Study:

• To investigate red cell and serum enzyme polymorphisms in six Amerindian tribes.
• To identify genetic variations, particularly in inbred populations.
• To compare enzyme gene frequencies across different Amerindian groups.

Main Methods:

• Analysis of red cell and serum enzyme phenotypes.
• Examination of enzyme systems including Acid phosphatase (AcP), Phosphoglucomutase (PGM), and 6-Phosphogluconate dehydrogenase (6PGD).
• Comparison of gene frequencies between inbred and non-inbred Amerindian tribes.

Main Results:

• Significant deviations in phenotype and gene frequencies for AcP, PGM, and 6PGD were found in the Siriono, Chipaya, and Jicaque tribes.
• These three tribes showed marked inbreeding.
• Consistent results were observed for Adenylate kinase (AK), Glucose-6-phosphate dehydrogenase (G6PD), PGM2, Adenosine deaminase (ADA), and Lactate dehydrogenase (LDH) across populations.

Conclusions:

• Inbreeding significantly impacts red cell enzyme gene frequencies in specific Amerindian populations.
• AcP, PGM, and 6PGD serve as sensitive markers for detecting genetic anomalies in isolated groups.
• Further research is needed to understand the evolutionary implications of these findings.