Gene Regulation in Primates Evolves under Tissue-Specific Selection Pressures
Author Information
Author(s): Ran Blekhman, Alicia Oshlack, Adrien E. Chabot, Gordon K. Smyth, Yoav Gilad
Primary Institution: Department of Human Genetics, University of Chicago
Hypothesis
Regulatory changes play an important role in primate evolution.
Conclusion
The study identifies genes and pathways in primates whose regulation has evolved under natural selection, particularly in relation to metabolic pathways.
Supporting Evidence
- The study identified a large number of genes involved in metabolic pathways that evolved under natural selection.
- Evidence for tissue-specific selection pressures was found, indicating that gene regulation adapts differently in various tissues.
- Lower rates of protein evolution were observed for genes with regulatory changes under natural selection.
Takeaway
Scientists looked at how genes work in humans and other primates to see how they have changed over time, especially in how they help with digestion and metabolism.
Methodology
The study used a multi-species microarray to measure gene expression levels in livers, kidneys, and hearts from humans, chimpanzees, and rhesus macaques.
Potential Biases
Potential biases due to environmental differences between species and uncontrolled variables like age and sex.
Limitations
The study could not control for environmental effects on gene expression and had limited sample sizes for certain demographics.
Participant Demographics
Samples were taken from six individuals each of humans, chimpanzees, and rhesus macaques.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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