Genetic Explanation for Poor Thermoregulation in Piglets
Author Information
Author(s): Berg Frida, Gustafson Ulla, Andersson Leif
Primary Institution: Uppsala University
Hypothesis
Is the UCP1 gene disrupted in the pig lineage, leading to poor thermoregulation in piglets?
Conclusion
The UCP1 gene is disrupted in domestic pigs and their wild ancestors, explaining the poor thermoregulation in piglets.
Supporting Evidence
- The UCP1 gene is crucial for thermogenesis and is disrupted in pigs.
- Piglets rely on shivering for thermoregulation due to the lack of brown adipose tissue.
- The disruption of UCP1 was estimated to have occurred about 20 million years ago.
- UCP1 is exclusively expressed in brown adipose tissue, which is absent in pigs.
Takeaway
Piglets can't stay warm because they don't have a special fat that helps keep them warm, and scientists found out that a gene important for this fat is broken in pigs.
Methodology
The complete genome sequence of pig UCP1 was determined using long-range PCR and genome walking.
Limitations
The study does not resolve whether the disruption of UCP1 was the primary event leading to the loss of brown adipose tissue.
Participant Demographics
Samples included various breeds of domestic pigs and wild boar.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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