A team of earth researchers, including biologists from the U of A, have published a paper showing the discovery of an evolutionary series that has been linked to contact with the tentacles of sea anemones and human hearing. The gene, called pou-iv (pronounced “pow four”), is important for the development of the auditory cells in the human ear.
Cnidarians, which include jellyfish, corals and sea anemones, are the closest animal with bilateral symmetry, as are humans and others. Therefore, cnidarians need to study human evolutionary history because there may be patterns shared by bilateral animals and cnidarians to our common ancestor. A feature of the memo is the nervous system, and bilaterians and cnidarians use the same sets of genes in neural development.
The auditory cells in the ear in the vertebrate are called to collect vibrations for hearing. Although they are not known to be able to hear, sea anemones have various features on their tentacles – also called hair cells – that they use to detect the movements of their prey.
In mammals, the iv post is necessary for proper hair growth, and mice without the iv post are deaf. The sea anemone is also a pou-iv species, but before the research team worked, no one looked at its role in the growth of anemone hair.
The researchers tapped the pou-iv gene into a sea anemone and found that it affected the growth of tentacular hair cells, unlocking the animals ’response to touch. They also found that pou-iv is necessary to convert the polycystin 1 gene into sea anemones, which is necessary for the detection of normal fluid flow by vertebrate kidney cells. Taken together, this demonstrates that the pou-iv has a very ancient role in developing the concept of touch that goes back at least to our last ancestor with sea anemones.
The U researchers of A and the Nakanishi Lab, led by assistant biologist Nagayasu Nakanishi, are the new recipients of an NSF CAREER award for their work in the development of the system. nerve. He is the author of the study.
“This study is exciting because it not only opens up a new field of research into the growth and function of mechanosensation in a sea anemone, and it has a lot of potential for history and with important insights (to be revealed in the future), “says Nakanishi,” but also shows us that the building blocks of our hearing have ancient evolutionary roots associated with hundreds of millions of years into the Precambrian. “
The paper is printed on eLife.
The evolutionary origin of the abdomen
Ethan Ozment et al, Cnidarian hair cell development illuminate an ancient approach for class IV POU transcription factor in the characterization of mechanoreceptor expression, eLife (2021). DOI: 10.7554 / eLife.74336
Presented by the University of Arkansas
Directions: Hearing about human contact with sea anemones (2022, April 1) Retrieved 2 April 2022 from https://phys.org/news/2022- 04-gene-linked-humans-sea-anemones.html
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