Bat DNA Adaptations
Bat DNA adaptations may connect virus defense, longevity, and cancer resistance
Introduction To Bat Immunity
Bats are unique creatures that have fascinated scientists for their ability to live long lives, rarely get cancer, and exhibit a strong immune system. Researchers have been studying the genetic adaptations of bats to understand the secrets behind their impressive health. A recent study published in Nature has shed light on the connection between bat DNA adaptations, virus defense, longevity, and cancer resistance. The study found that the key to bats' impressive lifespan and ability to resist cancer is embedded in their DNA, specifically in the way they encode genomic changes after exposure to pathogens in their environment.Genetic Adaptations Of Bats
The research team, led by the University of Vermont and Penn State University, analyzed the bat genome and experimented on cultivated cells to mimic their response to disease. They identified where in the distant past eight species of Myotis bats encountered pathogens and how they influenced their evolution. The team screened the genome for positive selection, which is the process by which genes adapt to their environment, to pinpoint structural changes such as gene duplication or deletion. They found key differences between how bats and humans and other primates have adapted to DNA and RNA viruses. While humans show positive selection for proteins that interact with RNA viruses such as SARS-CoV-2 and influenza, bats have greater selection for proteins that react to DNA viruses such as hepatitis B and herpesviruses.
Unique Gene-Copy Mechanism
The researchers also discovered that bats exhibit a unique gene-copy mechanism for DNA repair, which is essential for longevity and resistance to age-related diseases such as cancer. This mechanism, known as copy number variation, allows bats to diversify the function of their genes, potentially enabling them to respond to multiple viruses or promote longevity using new pathways. The team built the first near-complete genomes for eight different Myotis bats to look for clues into how disease resistance played a role in their evolution. They collected tissue from Myotis bats in the American West using a novel sampling approach developed by biologist Juan Manuel "Manny" Vazquez.Longevity And Cancer Resistance
The study found that the recurrent evolution of longevity in Myotis bats is associated with positive selection in cancer pathways. The researchers demonstrated a unique response to DNA damage in primary cells of the long-lived Myotis lucifugus. They also identified patterns of adaptation contributing to longevity, cancer resistance, and viral interactions. The findings suggest that bats' remarkable longevity and immunity are linked through pleiotropic adaptations to viruses and ageing-related disease.
Implications And Future Research
The study's findings have significant implications for our understanding of the genetic basis of longevity and cancer resistance. The unique gene-copy mechanism and adaptations to DNA and RNA viruses in bats may provide insights into the development of new therapies for human diseases. Further research is needed to fully understand the mechanisms underlying bats' impressive health and to explore the potential applications of their genetic adaptations.
Conclusion And Future Outlook
In conclusion, the study of bat DNA adaptations has provided valuable insights into the connection between virus defense, longevity, and cancer resistance. The unique genetic mechanisms and adaptations of bats may hold the key to understanding and addressing some of the most pressing health challenges facing humans today. As researchers continue to explore the genetic basis of bats' impressive health, we may uncover new and innovative ways to promote longevity and prevent disease.
Sources
This is an original synthesis by Qivorane based on reporting from the outlets below.