A Species That Is Attracting Scientists Due to Its Regenerative Capacity

One of the species that are attracting attention among the science community is the Axolotl Salamander. They have unique traits that make them important in the scientific study of regeneration, metamorphosis, and adaptations. Axolotl (Ambystoma mexicanum) are species under the class Amphibia and order Urodela. They are paedomorphic, as they retain the traits they had in the larval stage and remain fully aquatic in their adult stage. They are one of the critically endangered species in the wild, according to the International Union for Conservation of Nature (IUCN), with fewer than 1,000 individuals in their native habitat around Lake Xochimilco near Mexico City. Now, the species occurs only in three sites: the canals of Lakes Xochimilco, Chalco, and Chapultepec.

What Is Their Significance in Scientific Research?

Axolotls are a species within the salamander family, and they have a trait called neoteny, which means reaching sexual maturity without undergoing metamorphosis. Most amphibians live their egg and larval stages in water, where they use gills to breathe and tails to swim. But then, they undergo metamorphosis, during which their legs and lungs develop and their tails shorten. In their adult stage, they live on land and use their lungs and skin for respiration.
However, some salamanders like axolotls never metamorphose completely. They retain larval features like gills but become sexually mature and reproduce while still in water. This is called neoteny. Neoteny also provides a survival advantage in their native environment. In some cases, scientists can induce metamorphosis artificially by exposing axolotls to thyroid hormones or changing their environment to encourage air-breathing.
Moreover, axolotls have an extraordinary ability to regenerate their body parts, including limbs, tails, and even parts of their eyes, heart, and brain. They can regrow entire limbs, including bones, muscles, nerves, and skin. They can regenerate these structures repeatedly throughout life, with no scarring and full functional recovery. This has attracted many scientists who aim to understand their regenerative capacity and its potential applications to humans. In addition to this, axolotls have the ability to accept tissue transplants from other individuals with full functionality and minimal immune rejection. This remarkable trait makes axolotls one of the most valuable model organisms in regenerative biology and research.