China Animal Husbandry and Veterinary Medicine ›› 2022, Vol. 49 ›› Issue (1): 216-223.doi: 10.16431/j.cnki.1671-7236.2022.01.023

• Genetics and Breeding • Previous Articles     Next Articles

Research Progress on Xist lncRNA Mediated X Chromosome Inactivation and Its Application

TAO Weikun1, LIU Bo1, HUANG Fei1, WANG Jie2, GAO Qinghua1,3   

  1. 1. College of Animal Science, Xinjiang Tarim University, Alar 843300, China;
    2. College of Life Science, Xinjiang Tarim University, Alar 843300, China;
    3. Xinjiang Production and Construction Corps Tarim Key Laboratory of Animal Husbandry Technology, Alar 843300, China
  • Received:2021-07-08 Online:2022-01-05 Published:2021-12-29

Abstract: X chromosome inactivation (XCI) is an epigenetic mechanism of dosage compensation between two sexes in mammals during mammalian embryonic development, which leads to the lifelong transcriptional silencing of one randomly chosen X chromosome in females. X chromosome inactivation center (XIC) is the main regulatory region of XCI, X-inactive specific transcript (Xist) is located in this region, and it is a key part of XCI. Xist long chain non-coding RNA(lncRNA) is an inactive specific transcript, which can recruit a series of auxiliary factors such as RNA interaction binding protein (RBP) and chromatin modification factors to change the spatial structure of chromosome and nucleus, chromatin composition and X-linked gene transcription level, so as to transform active chromosomes into inactive chromosomes. At present, studies in mice, humans and other species have found that the establishment and maintenance of appropriate econometric compensation are very important and widespread for mammals to survive in the embryonic development process. However, there are certain specific differences in the biological phenomenon of embryos in different species and genders, and some human diseases are also related to XCI, such as cancer and tumor. At present, the research on the mechanism of XCI is relatively scattered. The author summarizes the main molecular mechanism, regulatory mechanism and research in different species of XCI mediated by Xist lncRNA.

Key words: mammal; X chromosome inactivation (XCI); X chromosome inactivation center (XIC); X-inactive specific transcript (Xist); lncRNA

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