Early development of the cochlea of the common marmoset, a non-human primate model

Makoto Hosoya, Masato Fujioka, Junko Okahara, Sho Yoshimatsu, Hideyuki Okano, Hiroyuki Ozawa

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Fine-tuned cochlear development is essential for hearing. Owing to the difficulty in using early human fetal samples, most of our knowledge regarding cochlear development has been obtained from rodents. However, several inter-species differences in cochlear development between rodents and humans have been reported. To bridge these differences, we investigated early otic development of a non-human primate model animal, the common marmoset (Callithrix jacchus). Methods: We examined 20 genes involved in early cochlear development and described the critical developmental steps for morphogenesis, which have been reported to vary between rodents and marmosets. Results: The results revealed that several critical genes involved in prosensory epithelium specifications showed higher inter-species differences, suggesting that the molecular process for hair cell lineage acquisition in primates differs considerably from that of rodents. We also observed that the tempo of cochlear development was three times slower in the primate than in rodents. Conclusions: Our data provide new insights into early cochlear development in primates and humans and imply that the procedures used for manipulating rodent cochlear sensory cells cannot be directly used for the research of primate cells due to the intrinsic inter-species differences in the cell fate determination program.

Original languageEnglish
Article number6
JournalNeural Development
Volume17
Issue number1
DOIs
Publication statusPublished - 2022 Dec

Keywords

  • Cochlea
  • Cochlear development
  • Marmoset
  • Rodents
  • Sensory epithelium

ASJC Scopus subject areas

  • Developmental Neuroscience

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