Catastrophic cellular events leading to complex chromosomal rearrangements in the germline

M. Fukami, H. Shima, E. Suzuki, T. Ogata, K. Matsubara, T. Kamimaki

Research output: Contribution to journalReview articlepeer-review

26 Citations (Scopus)

Abstract

Although complex chromosomal rearrangements were thought to reflect the accumulation of DNA damage over time, recent studies have shown that such rearrangements frequently arise from ‘all-at-once’ catastrophic cellular events. These events, designated chromothripsis, chromoanasynthesis, and chromoanagenesis, were first documented in the cancer genome and subsequently observed in the germline. These events likely result from micronucleus-mediated chromosomal shattering and subsequent random reassembly of DNA fragments, although several other mechanisms have also been proposed. Typically, only one or a few chromosomes of paternal origin are affected per event. These events can produce intrachromosomal deletions, duplications, inversions, and translocations, as well as interchromosomal translocations. Germline complex rearrangements of autosomes often result in developmental delay and dysmorphic features, whereas X chromosomal rearrangements are usually associated with relatively mild clinical manifestations. The concept of these catastrophic events provides novel insights into the etiology of human genomic disorders. This review introduces the molecular characteristics and phenotypic outcomes of catastrophic cellular events in the germline.

Original languageEnglish
Pages (from-to)653-660
Number of pages8
JournalClinical Genetics
Volume91
Issue number5
DOIs
Publication statusPublished - 2017 May 1
Externally publishedYes

Keywords

  • chromoanagenesis
  • chromoanasynthesis
  • chromosomal rearrangement
  • chromothripsis
  • congenital disorder
  • germline mutation

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)

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