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Title: Characteristics of induced mutations in offspring derived from irradiated mouse spermatogonia and mature oocytes

Journal Article · · Scientific Reports
ORCiD logo [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8]; ORCiD logo [9];  [10];  [2];  [2]
  1. Radiation Effects Research Foundation, Dept. of Molecular Biosciences, Hiroshima (Japan); DOE/OSTI
  2. Radiation Effects Research Foundation, Dept. of Molecular Biosciences, Hiroshima (Japan)
  3. Department of Radiation Effects Research, National Institute of Radiological Sciences (NIRS), National Institutes for Quantum and Radiological Science and Technology (QST), Chiba (Japan)
  4. Artificial Intelligence Research Center, AIST, 2-3-26 Aomi, Koto-ku, Tokyo (Japan); Real World Big-Data Computation Open Innovation Laboratory, AIST-Tokyo Tech, 2-12-1 Okayama, Meguro-ku, Tokyo (Japan)
  5. Artificial Intelligence Research Center, AIST, 2-3-26 Aomi, Koto-ku, Tokyo (Japan)
  6. Radiation Effects Research Foundation, 5-2 Hijiyama Park, Minami-ku, Hiroshima (Japan). Dept. of Statistics
  7. National Institute of Genetics, Mishima (Japan). Comparative Genomics Laboratory
  8. Artificial Intelligence Research Center, AIST, 2-3-26 Aomi, Koto-ku, Tokyo (Japan); Real World Big-Data Computation Open Innovation Laboratory, AIST-Tokyo Tech, 2-12-1 Okayama, Meguro-ku, Tokyo (Japan); Humanome Lab, Inc., L-HUB 3F, 1-4, Shumomiyabi-cho, Sinjuku-ku, Tokyo (Japan)
  9. National Institute of Genetics, Mishima (Japan). Comparative Genomics Laboratory
  10. Tokyo Metropolitan University, Tokyo (Japan). Dept. of Radiological Sciences, Graduate School of Human Health Sciences; Executive Director, QST, Chiba (Japan)

The exposure of germ cells to radiation introduces mutations in the genomes of offspring, and a previous whole-genome sequencing study indicated that the irradiation of mouse sperm induces insertions/deletions (indels) and multisite mutations (clustered single nucleotide variants and indels). However, the current knowledge on the mutation spectra is limited, and the effects of radiation exposure on germ cells at stages other than the sperm stage remain unknown. Here, we performed whole-genome sequencing experiments to investigate the exposure of spermatogonia and mature oocytes. We compared de novo mutations in a total of 24 F1 mice conceived before and after the irradiation of their parents. The results indicated that radiation exposure, 4 Gy of gamma rays, induced 9.6 indels and 2.5 multisite mutations in spermatogonia and 4.7 indels and 3.1 multisite mutations in mature oocytes in the autosomal regions of each F1 individual. Notably, we found two types of deletions, namely, small deletions (mainly 1~12 nucleotides) in non-repeat sequences, many of which showed microhomology at the breakpoint junction, and single-nucleotide deletions in mononucleotide repeat sequences. The results suggest that these deletions and multisite mutations could be a typical signature of mutations induced by parental irradiation in mammals.

Research Organization:
National Academy of Sciences, Washington, DC (United States)
Sponsoring Organization:
USDOE Office of Environment, Health, Safety and Security (AU)
Grant/Contract Number:
HS0000031
OSTI ID:
1624520
Journal Information:
Scientific Reports, Journal Name: Scientific Reports Journal Issue: 1 Vol. 10; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Endemic and panglobal genetic groups, and divergence of host-associated forms in worldwide collections of the wheat leaf rust fungus Puccinia triticina as determined by genotyping by sequencing journal December 2019
Evolution of the Mutational Process under Relaxed Selection in Caenorhabditis elegans journal November 2018
A Novel, Drug Resistance-Independent, Fluorescence-Based Approach To Measure Mutation Rates in Microbial Pathogens journal February 2019
Muver, a computational framework for accurately calling accumulated mutations journal May 2018
Genome sequencing of evolved aspergilli populations reveals robust genomes, transversions in A. flavus, and sexual aberrancy in non-homologous end-joining mutants journal November 2019
A whole genome scan of SNP data suggests a lack of abundant hard selective sweeps in the genome of the broad host range plant pathogenic fungus Sclerotinia sclerotiorum journal March 2019
Limited Mutation-Rate Variation Within the Paramecium aurelia Species Complex journal July 2018

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