Wed Sep 25 07:53:57 UTC 2024: ## Naked Mole-Rats’ Unique Immune System Revealed: Loss of CD1 Genes Points to Unconventional Defense Mechanisms
**Kaliningrad, Russia** – A new study published in *Biology Direct* has uncovered an intriguing aspect of the naked mole-rat’s extraordinary longevity. Scientists have discovered that these underground rodents have lost a significant number of functional CD1 genes, which are crucial for the immune system’s defense against infections.
CD1 proteins, found on the surface of immune cells, act as flags that alert T-lymphocytes to the presence of foreign invaders like bacteria. However, the researchers found that naked mole-rats, known for their exceptional lifespan of up to 40 years, lack these proteins, suggesting they have developed alternative defense mechanisms.
This finding further emphasizes the uniqueness of the naked mole-rat’s immune system. Previous studies have shown the absence of natural killer T cells in these animals, cells that play a critical role in eliminating infected and cancerous cells. Since CD1 genes are essential for the development of these cells, the study suggests that naked mole-rats have evolved a CD1-independent immune response.
“We believe that other immune cells, such as myeloid cells and different types of T lymphocytes, might be compensating for the loss of CD1 proteins and natural killer T cells,” explains Alexey Zamaraev, a researcher involved in the project.
The study also revealed that the CD1 proteins in other rodent species vary significantly, particularly within the Myomorpha suborder. In contrast, rodents from the Sciuromorpha, Castorimorpha, and Hystricomorpha suborders exhibit more conserved proteins, highlighting their evolutionary history.
The researchers plan to investigate another type of immune molecule, called MR1 proteins, which present different types of antigens to T-lymphocytes. This research could lead to a deeper understanding of the immune system’s diversity across different species and potentially inspire new approaches for targeting specific immune cells for therapeutic purposes.
“We hope that our findings will not only reveal the fundamental features of the immune system in various animals but also guide us towards targeted activation of CD1-specific T-cells and improved immune responses to diverse pathogens,” says Constantin Gunbin, another researcher involved in the project.
This study underscores the remarkable adaptations of the naked mole-rat and offers exciting avenues for further investigation into the complex workings of the immune system.
First Piper 