The DOI matches its Crossref record; 37 of the 37 references it cites were found in a registry or an index.
An N -ethyl- N -nitrosourea screen for genes involved in variegation in the mouse
Open accessAbstract
We have developed a sensitized screen to identify genes involved in gene silencing, using random N -ethyl- N -nitrosourea mutagenesis on mice carrying a variegating GFP transgene. The dominant screen has produced six mutant lines, including both suppressors and enhancers of variegation. All are semidominant and five of the six are homozygous embryonic lethal. In one case, the homozygous lethality depends on sex: homozygous females die at midgestation and display abnormal DNA methylation of the X chromosome, whereas homozygous males are viable. Linkage analysis reveals that the mutations map to unique chromosomal locations. We have studied the effect of five of the mutations on expression of an endogenous allele known to be sensitive to epigenetic state, agouti viable yellow . In all cases, there is an effect on penetrance, and in most cases, parent of origin and sex-specific effects are detected. This screen has identified genes that are involved in epigenetic reprogramming of the genome, and the behavior of the mutant lines suggests a common mechanism between X inactivation and transgene and retrotransposon silencing. Our findings raise the possibility that the presence or absence of the X chromosome in mammals affects the establishment of the epigenetic state at autosomal loci by acting as a sink for proteins involved in gene silencing. The study demonstrates the power of sensitized screens in the mouse not only for the discovery of novel genes involved in a particular process but also for the elucidation of the biology of that process.
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“A preliminary description of the first six heritable mutations, which we refer to as Modifiers of murine metastable epialleles or Mommes, following the screening of 608 G1 offspring, has been published [10].”
From A genome-wide screen for modifiers of transgene variegation identifies genes with critical roles in development (2008) · cites this paper as [10]
In the citing paper
“We reported that all six were dosage-effect genes and five of the six were homozygous lethal, with loss of homozygotes apparent at weaning, but no knowledge of when death occurred.”
From A genome-wide screen for modifiers of transgene variegation identifies genes with critical roles in development (2008) · cites this paper as [10]
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“We have previously reported that the GFP transgene used in this screen has integrated as an approximately 11 copy array on chromosome 1 [10].”
From A genome-wide screen for modifiers of transgene variegation identifies genes with critical roles in development (2008) · cites this paper as [10]
In the citing paper
“Recently, we established a similar screen in the mouse using a transgenic line that expresses green fluorescent protein (GFP) in a variegated manner in erythrocytes [10].”
From A genome-wide screen for modifiers of transgene variegation identifies genes with critical roles in development (2008) · cites this paper as [10]
In the citing paper
“MommeD2 and MommeD4 are homozygous lethal at 8.5 days post-coitus (dpc) and 17.5 dpc, respectively [10,12].”
From A genome-wide screen for modifiers of transgene variegation identifies genes with critical roles in development (2008) · cites this paper as [10]
In the citing paper
“We have reported previously that as the percentage of expressing cells increases, the mean fluorescence of the expressing cells increases [10].”
From A genome-wide screen for modifiers of transgene variegation identifies genes with critical roles in development (2008) · cites this paper as [10]
In the citing paper
“MommeD5 was localized to a 1.42 Mb region on chromosome 4 flanked by the markers rs27486641 and rs27541967 [10] (Table 4).”
From A genome-wide screen for modifiers of transgene variegation identifies genes with critical roles in development (2008) · cites this paper as [10]
In the citing paper
“MommeD1 is homozygous lethal in females only, with death occurring around mid-gestation [10,11].”
From A genome-wide screen for modifiers of transgene variegation identifies genes with critical roles in development (2008) · cites this paper as [10]
In the citing paper
“The frequency with which we found these mutations, 1 in 100 G1 offspring, was similar to our previous results [10].”
From A genome-wide screen for modifiers of transgene variegation identifies genes with critical roles in development (2008) · cites this paper as [10]
In the citing paper
“Extension of the screen has produced four new MommeDs, MommeD7-D10, all of which behave in a semidominant fashion, as do the six previously reported [10].”
From A genome-wide screen for modifiers of transgene variegation identifies genes with critical roles in development (2008) · cites this paper as [10]
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Cites
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Self-citationRepeat-induced gene silencing in mammals
Garrick, D., Fiering, S., Martin, D. I. K., & Whitelaw, E. (1998) · Nature Genetics · doi:10.1038/ng0198-56 · Cited by 887
Self-citationMolecular characterization of the mouse agouti locus
Bultman, S. J., Michaud, E. J., & Woychik, R. P. (1992) · Cell · doi:10.1016/s0092-8674(05)80067-4 · Cited by 805
Heterochromatic Silencing and HP1 Localization in Drosophila Are Dependent on the RNAi Machinery
Pal‐Bhadra, M., Leibovitch, B. A., Gandhi, S. G., Rao, M., Bhadra, U., Birchler, J. A., & Elgin, S. C. R. (2004) · Science · doi:10.1126/science.1092653 · Cited by 655
Rakyan, V. K., Chong, S., Blewitt, M. E., Cuthbert, P. C., Morgan, H. D., Luu, K. V. K., & Whitelaw, E. (2003) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.0436776100 · Cited by 642
Self-citationGenetic variants and strains of the Laboratory mouse
(1996) · doi:10.1093/oso/9780198548690.001.0001 · Cited by 504
Expansions of transgene repeats cause heterochromatin formation and gene silencing in Drosophila
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Lemmers, R. J. L. F., Tawil, R., Petek, L. M., Balog, J., Block, G. J., Santen, G. W. E., Amell, A. M., van der Vliet, P. J., Almomani, R., Straasheijm, K. R., et al. (2012) · Nature Genetics · doi:10.1038/ng.2454 · Cited by 661
Child Health, Developmental Plasticity, and Epigenetic Programming
Hochberg, Z., Feil, R., Constância, M., Fraga, M. F., Junien, C., Carel, J., Boileau, P., Bouc, Y. L., Deal, C., Lillycrop, K. A., et al. (2010) · Endocrine Reviews · doi:10.1210/er.2009-0039 · Cited by 657
Self-citationConstitutive heterochromatin formation and transcription in mammals
Saksouk, N., Simboeck, E., & Déjardin, J. (2015) · Epigenetics & Chromatin · doi:10.1186/1756-8935-8-3 · Cited by 607
Epigenetic gene regulation: Linking early developmental environment to adult disease
Dolinoy, D. C., Weidman, J. R., & Jirtle, R. L. (2006) · Reproductive Toxicology · doi:10.1016/j.reprotox.2006.08.012 · Cited by 505
Programming of DNA Methylation Patterns
Cedar, H., & Bergman, Y. (2012) · Annual Review of Biochemistry · doi:10.1146/annurev-biochem-052610-091920 · Cited by 447
Metadata
- Authors
- Blewitt, M. E., Vickaryous, N. K., Hemley, S. J., Ashe, A., Bruxner, T. J., Preis, J. I., Arkell, R., & Whitelaw, E.
- Affiliations
- The University of Sydney (AU)
- Venue
- Proceedings of the National Academy of Sciences
- Publisher
- National Academy of Sciences
- Published
- 2005-05-12
- Volume
- 102
- Issue
- 21
- Pages
- 7629-7634
- ISSN
- 0027-8424 (ISSN-L)
- 1091-6490
- PMC
- PMC1140414
- OpenAlex
- W2089778660
- Cited by
- 186
- References
- 37
- Citations by year
- 2026: 1 · 2025: 6 · 2024: 9 · 2023: 4 · 2022: 8 · 2021: 11 · 2020: 5 · 2019: 11 · 2018: 16 · 2017: 17 · 2016: 8 · 2015: 9 · 2014: 6 · 2013: 14 · 2012: 11
- FWCI
- 3.39
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Proceedings of the National Academy of Sciences (publishedVersion)
- Europe PMC (PubMed Central) (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- ANU Open Research (Australian National University) (submittedVersion)
- Funders
- Medical Research Council
- National Health and Medical Research Council (301955)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Syndromes and Imprinting
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
- Keywords
- variegation, gene silencing, N-ethyl-N-nitrosourea mutagenesis, GFP transgene, X chromosome inactivation, epigenetic reprogramming, retrotransposon silencing, transposon silencing, embryonic lethality, parent-of-origin effects, penetrance, mouse mutants
- MeSH terms
- Alleles, Animals, Chromosome Mapping, Ethylnitrosourea, Flow Cytometry, Genetic Testing, Mice, Transgenic, Phenotype, Pigmentation, Sex Factors, X Chromosome, Mutagenesis, Transgenes, DNA Methylation, Gene Silencing, Epigenesis, Genetic, Green Fluorescent Proteins, Mice
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