pou-iv<\/em>, is important for the development of auditory cells in the human inner ear.<\/p>\nHow was this gene discovered?<\/h3>\n Cnidarians, which include jellyfish, corals, and sea anemones, are the closest living relatives of animals with bilateral symmetry, such as humans and other invertebrates. Therefore, cnidarians are useful for studying human evolutionary history. This is because features shared by bilateral animals and cnidarians were likely present in our last common ancestor. A shared feature that scientists have observed is the nervous system, and both bilaterians and cnidarians utilise similar sets of genes in neural development.<\/p>\n
Auditory cells in the vertebrate inner ear pick up vibrations to enable hearing and are known as \u2018hair cells.\u2019 While they are not known to be able to hear, sea anemones have similar-looking cells on their tentacles \u2014 also called hair cells \u2014 that they utilise to sense the movements of their prey.<\/p>\n
What does this gene mean for the development of auditory cells?<\/h3>\n In mammals,\u00a0pou-iv<\/em>\u00a0is required for hair cell development, and the mice that lack\u00a0pou-iv<\/em>\u00a0are deaf. Sea anemones also have a\u00a0pou-iv<\/em>\u00a0gene, but, prior to the research team\u2019s experiment, no one had ever examined its role in anemone hair cell development.<\/p>\nScientists eliminated the\u00a0pou-iv<\/em>\u00a0gene in a sea anemone and discovered that it resulted in abnormal development of tentacular hair cells, removing the animals\u2019 response to touch. They also discovered that\u00a0pou-iv<\/em>\u00a0is required to turn on the\u00a0polycystin 1<\/em>\u00a0gene in sea anemones, which is necessary for normal fluid flow sensing by vertebrate kidney cells.<\/p>\nThus, this suggests that\u00a0pou-iv<\/em>\u00a0has a very ancient role in the development of touch sensation \u2013 as well as the development of auditory cells \u2013 that goes back at least as far as our last common ancestor with sea anemones.<\/p>\nNagayasu Nakanishi. Photo credit: University Relations.<\/figcaption><\/figure>\nWhat does this discovery mean for science?<\/h3>\n UA researchers worked with the Nakanishi Lab for this experiment and were overseen by Assistant Professor of Biological Sciences, Nagayasu Nakanishi, corresponding author on this study, and recent recipient of an NSF CAREER award for his work on the evolution of the nervous system.<\/p>\n
\u201cThis study is exciting because it not only opened a new field of research into how mechanosensation develops and functions in a sea anemone, which has ample potential for novel and important discoveries (to be reported in the future),\u201d concluded Nakanishi. \u201cBut it also informs us that the building blocks of our sense of hearing have ancient evolutionary roots dating back hundreds of millions of years into the Precambrian.\u201d<\/p>\n
To keep up to date with our content,\u00a0subscribe for updates<\/a>\u00a0on our digital publication and newsletter.<\/p>\n","protected":false},"excerpt":{"rendered":"A research team from the University of Arkansas has made a link between the developmental gene for touch in sea anemones and the development of auditory cells in humans. An international team of investigators, including several researchers in biological sciences from UA, have published a paper in eLife that reports the discovery of a developmental […]<\/p>\n","protected":false},"author":21,"featured_media":20073,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[24429],"tags":[3475],"acf":[],"yoast_head":"\n
Sea anemone gene linked to development of auditory cells in humans<\/title>\n \n \n \n \n \n \n \n \n \n \n \n \n \n\t \n\t \n\t \n \n \n \n \n \n\t \n\t \n\t \n