Parallel effects of genetic variation in ACE activity in baboons and humans

Abstract

Like humans, savannah baboons (Papio sp.) show heritable interindividual variation in complex physiological phenotypes. One prominent example of such variation involves production of the homeostatic regulator protein angiotensin converting enzyme (ACE), which shows heritable variation in both baboons and humans. In humans, this phenotypic variation is associated with an Alu insertion-deletion polymorphism in the ACE gene, which explains approximately half of the variation in serum ACE activity. We identified a similar Alu insertion-deletion polymorphism in the baboon ACE homologue and measured its frequency in a wild population and a captive population of baboons. We also analyzed the contribution of ACE genotype at this indel to variation in serum ACE activity in the captive population. When conditioned on weight, a known factor affecting ACE activity in humans, age and ACE genotype both accounted for variance in ACE activity; in particular, we identified a significant nonadditive interaction between age and genotype. A model incorporating this interaction effect explained 21.6% of the variation in residual serum ACE activity. Individuals homozygous for the deletion mutation exhibited significantly higher levels of ACE activity than insertion-deletion heterozygotes at younger ages (10-14 years), but showed a trend towards lower levels of ACE activity compared with heterozygotes at older ages (> or =15 years). These results demonstrate an interesting parallel between the genetic architecture underlying ACE variation in humans and baboons, suggesting that further attention should be paid in humans to the relationship between ACE genetic variation and aging.

Surveillance of emerging infectious diseases in wild non-human primates in Kenya: Successes and challenges

“…The ability of pathogens to invade hosts is dependent on available receptors, biology of the pathogen, various point mutations and pathogen recombination (Sharp and Hahn, 2011a). For example, viral receptors that exist on the host that support entry for SARS-CoV-2 in humans, have also been described in NHPs (Liu et al, 2020;Schmitt et al, 2020;Tung et al, 2007) and studies on HTLV-1 have shown that glucose transporter GLUT1, heparan sulfate proteoglycans, and neuropilin-1 act as receptors for both human and NHP infections (Hoshino, 2012). Pathogen genetics is also integral in disease transmission dynamics.…”