Mole rats are subterranean rodents found in Africa. One of the features that makes them stand out is their ability to live in environments with high acidity. This tolerance to acid is due to a mutation in the ASIC3 gene, which codes for a protein that is involved in the sensation of pain.
For years, it has remained a mystery why these creatures can burrow through acidic soil and survive in such extreme conditions. In a recent paper published in the journal Current Biology, researchers uncover the mechanisms behind their remarkable resilience.
The study found that mole rats have a non-functional version of the ASIC3 gene. In most animals, this gene produces a protein that plays a crucial role in detecting acid and triggering pain, causing them to avoid potentially harmful acidic environments. However, in mole rats, the mutated ASIC3 gene no longer produces this functional protein. This means that they do not experience the same pain response as other animals, enabling them to thrive in acidic habitats.
"When we looked at the DNA sequence of the ASIC3 gene in mole rats, we found a mutation that completely changes the protein structure," said Dr. Gary Lewin, lead researcher of the study. "This mutation prevents the protein from being produced, which in turn means that mole rats don't have the same pain response to acids as other animals."
The mole rats' indifference to acid pain provides insight into the evolutionary adaptations that have allowed them to colonize and survive in their unique environments. This discovery opens new avenues for research on pain perception and potential pain therapies inspired by the mole rat's unique tolerance to acid.
