Planarian flatworms possess remarkable brain regeneration capabilities, thanks to specialized neoblast stem cells that can differentiate into any tissue. Upon damage, molecular signaling guides neoblasts to rebuild neural connections, even preserv...
While regeneration of body parts is possible in some organisms, only a few can regenerate a complex part of their body, such as the brain. Among the widely studied cases is the planarian flatworm. As revealed in the article by Nature Reviews Neuroscience, the flatworm has the ability to regenerate its whole brain regardless of how much of its body is damaged. Such capacity for regrowth is facilitated by a special kind of stem cell called neoblasts that constitute a large percentage of the body of the organism. These cells have the potential to differentiate into any body tissue, including nerves and brain structures. According to research conducted by institutions like the Howard Hughes Medical Institute, scientists have found out how these cells reorganize to form a functioning brain once again.
How Does the Regeneration Process Work?
The regeneration process starts almost instantly upon damage. According to studies from the Science and Cell journals, planarians depend on signaling mechanisms at the molecular level to ascertain how and where cells are to regenerate. Signaling ensures that the neoblasts regenerate into the proper tissues, thus ensuring that the regrown brain makes accurate connections with other bodily parts. Scientists have noted that these creatures are capable of keeping some learned behaviors after regeneration, thus indicating that memory does not necessarily need to be lost when an organism regenerates. This discovery has inspired researchers to investigate how such knowledge can be preserved and whether it is possible to store it outside the brain. The capability of rebuilding neural circuits and retaining their function constitutes the most sophisticated example of biological recovery witnessed in nature.
Scientists have noted that these creatures are capable of keeping some learned behaviors after regenerationImage Credit: Gemini
Why Does This Matter for Science?
Research on brain regeneration can extend beyond knowledge of flatworms. Scientists are researching whether the same can be applicable to human life in terms of medicine. According to articles written in the journal Nature, scientists have concluded that studying tissue regeneration by stem cells will enable them to find a cure for brain injuries or even some kind of neurodegenerative disease. Although it is impossible for human beings to regenerate their body like the flatworm, the science behind this phenomenon might come in handy for the future of medicine.
