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Choline deficiency alters global histone methylation and epigenetic marking at the Rel site of the calbindin 1 gene
Open accessAbstract
Maternal choline availability is essential for fetal neurogenesis. Choline deprivation (CD) causes hypomethylation of specific CpG islands in genes controlling cell cycling in fetal hippocampus. We now report that, in C57BL/6 mice, CD during gestational days 12-17 also altered methylation of the histone H3 in E17 fetal hippocampi. In the ventricular and subventricular zones, monomethyl-lysine 9 of H3 (H3K9me1) was decreased by 25% (P<0.01), and in the pyramidal layer, dimethyl-lysine 9 of H3 (H3K9me2) was decreased by 37% (P<0.05). These changes were region specific and were not observed in whole-brain preparations. Also, the same effects of CD on H3 methylation were observed in E14 neural progenitor cells (NPCs) in culture. Changes in G9a histone methyltransferase might mediate altered H3K9me2,1. Gene expression of G9a was decreased by 80% in CD NPCs (P<0.001). In CD, H3 was hypomethylated upstream of the RE1 binding site in the calbindin 1 promoter, and 1 CpG site within the calbindin1 promoter was hypermethylated. REST binding to RE1 (recruits G9a) was decreased by 45% (P<0.01) in CD. These changes resulted in increased expression of calbindin 1 in CD (260%; P<0.05). Thus, CD modulates histone methylation in NPCs, and this could underlie the observed changes in neurogenesis.
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“Furthermore, diets deficient in choline and betaine were shown to directly affect histone and DNA methylation in a number animal models (Du et al., 2009; Mehedint et al., 2010; Niculescu et al., 2006), suggesting that alterations in exogenous methyl donor availability may have strong effects on cellular epigenetic state and thus contribute to tumorigenesis.”
From The emerging hallmarks of cancer metabolism (2016) · cites this paper as Mehedint et al., 2010
Citations
Cites
PROTEIN MEASUREMENT WITH THE FOLIN PHENOL REAGENT
Lowry, O. H., Rosebrough, N., Farr, A. L., & Randall, R. (1951) · Journal of Biological Chemistry · doi:10.1016/s0021-9258(19)52451-6 · Cited by 316,394
Analysis of Relative Gene Expression Data Using Real-Time Quantitative PCR and the 2−ΔΔCT Method
Livak, K. J., & Schmittgen, T. D. (2001) · Methods · doi:10.1006/meth.2001.1262 · Cited by 180,860
EMBOSS: the European molecular biology open software suite.
Rice, P., Longden, I., & Bleasby, A. (2000) · Trends in Genetics · doi:10.1016/s0168-9525(00)02024-2 · Cited by 9,466
The language of covalent histone modifications
Strahl, B. D., & Allis, C. D. (2000) · Nature · doi:10.1038/47412 · Cited by 8,679
Jaenisch, R., & Bird, A. (2003) · Nature Genetics · doi:10.1038/ng1089 · Cited by 6,325
Histone demethylation mediated by the nuclear amine oxidase homolog LSD1
Shi, Y., Lan, F., Matson, C., Mulligan, P., Whetstine, J. R., Cole, P. A., Casero, R. A., & Shi, Y. (2004) · Cell · doi:10.1016/j.cell.2004.12.012 · Cited by 4,051
Histone demethylation by a family of JmjC domain-containing proteins
Tsukada, Y.-I., Fang, J., Erdjument‐Bromage, H., Warren, M., Borchers, C. H., Tempst, P., & Zhang, Y. (2005) · Nature · doi:10.1038/nature04433 · Cited by 2,244
The diverse functions of histone lysine methylation
Martin, C., & Zhang, Y. (2005) · Nature Reviews Molecular Cell Biology · doi:10.1038/nrm1761 · Cited by 2,157
Active Genes Are Tri-Methylated at K4 of Histone H3
Santos-Rosa, H., Schneider, R., Bannister, A. J., Sherriff, J., Bernstein, B. E., Emre, N. C. T., Schreiber, S. L., Mellor, J., & Kouzarides, T. (2002) · Nature · doi:10.1038/nature01080 · Cited by 2,138
Zhang, Y., & Reinberg, D. (2001) · Genes & Development · doi:10.1101/gad.927301 · Cited by 1,639
Genomic Maps and Comparative Analysis of Histone Modifications in Human and Mouse
Bernstein, B., Kamal, M., Lindblad‐Toh, K., Bekiranov, S., Bailey, D. K., Huebert, D. J., McMahon, S., Karlsson, E. K., Kulbokas, E. J., Gingeras, T., et al. (2005) · Cell · doi:10.1016/j.cell.2005.01.001 · Cited by 1,567
Tachibana, M., Sugimoto, K., Nozaki, M., Ueda, J., Ohta, T., Ohki, M., Fukuda, M., Takeda, N., Niida, H., Kato, H., et al. (2002) · Genes & Development · doi:10.1101/gad.989402 · Cited by 1,294
Lehnertz, B., Ueda, Y., Derijck, A. A. H. A., Braunschweig, U., Perez-Burgos, L., Kubicek, S., Chen, T., Li, E., Jenuwein, T., & Peters, A. H. F. M. (2003) · Current Biology · doi:10.1016/s0960-9822(03)00432-9 · Cited by 1,289
Felsenfeld, G., & Groudine, M. T. (2003) · Nature · doi:10.1038/nature01411 · Cited by 1,252
Partitioning and Plasticity of Repressive Histone Methylation States in Mammalian Chromatin
Peters, A. H. F. M., Kubicek, S., Mechtler, K., O’Sullivan, R. J., Derijck, A. A. H. A., Perez-Burgos, L., Kohlmaier, A., Opravil, S., Tachibana, M., Shinkai, Y., et al. (2003) · Molecular Cell · doi:10.1016/s1097-2765(03)00477-5 · Cited by 1,208
Ng, H., Robert, F., Young, R. A., & Struhl, K. (2003) · Molecular Cell · doi:10.1016/s1097-2765(03)00092-3 · Cited by 1,131
Regulation of histone acetylation during memory formation in the hippocampus
Levenson, J. M., O'Riordan, K. J., Brown, K. D., Trinh, M. A., Molfese, D. L., & Sweatt, J. D. (2004) · Journal of Biological Chemistry · doi:10.1074/jbc.m402229200 · Cited by 1,131
DNA methyltransferase Dnmt1 associates with histone deacetylase activity
Fuks, F., Burgers, W. A., Brehm, A., Hughes‐Davies, L., & Kouzarides, T. (2000) · Nature Genetics · doi:10.1038/71750 · Cited by 988
REST: A mammalian silencer protein that restricts sodium channel gene expression to neurons
Chong, J. A., Tapia-Ramirez, J., Kim, S., Toledo-Aral, J. J., Zheng, Y., Boutros, M. C., Altshuller, Y. M., Frohman, M. A., Kraner, S. D., & Mandel, G. (1995) · Cell · doi:10.1016/0092-8674(95)90298-8 · Cited by 967
Suz12 is essential for mouse development and for EZH2 histone methyltransferase activity
Pasini, D., Bracken, A. P., Jensen, M. R., Denchi, E. L., & Helin, K. (2004) · The EMBO Journal · doi:10.1038/sj.emboj.7600402 · Cited by 963
REST and Its Corepressors Mediate Plasticity of Neuronal Gene Chromatin throughout Neurogenesis
Ballas, N., Grunseich, C., Lu, D. D., Speh, J. C., & Mandel, G. (2005) · Cell · doi:10.1016/j.cell.2005.03.013 · Cited by 950
Tachibana, M., Ueda, J., Fukuda, M., Takeda, N., Ohta, T., Iwanari, H., Sakihama, T., Kodama, T., Hamakubo, T., & Shinkai, Y. (2005) · Genes & Development · doi:10.1101/gad.1284005 · Cited by 868
Rice, J. C., Briggs, S. D., Ueberheide, B. M., Barber, C. M., Shabanowitz, J., Hunt, D. F., Shinkai, Y., & Allis, C. D. (2003) · Molecular Cell · doi:10.1016/s1097-2765(03)00479-9 · Cited by 849
Tachibana, M., Sugimoto, K., Fukushima, T., & Shinkai, Y. (2001) · Journal of Biological Chemistry · doi:10.1074/jbc.m101914200 · Cited by 784
Methylation of histone H3 Lys 4 in coding regions of active genes
Bernstein, B., Humphrey, E. L., Erlich, R., Schneider, R., Bouman, P., Liu, J. S., Kouzarides, T., & Schreiber, S. L. (2002) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.082249499 · Cited by 778
Epigenetic mechanisms in memory formation
Levenson, J. M., & Sweatt, J. D. (2005) · Nature Reviews Neuroscience · doi:10.1038/nrn1604 · Cited by 767
Choline: Critical Role During Fetal Development and Dietary Requirements in Adults
Zeisel, S. H. (2006) · Annual Review of Nutrition · doi:10.1146/annurev.nutr.26.061505.111156 · Cited by 741
Self-citationHistone methylation versus histone acetylation: new insights into epigenetic regulation
Rice, J. C., & Allis, C. D. (2001) · Current Opinion in Cell Biology · doi:10.1016/s0955-0674(00)00208-8 · Cited by 701
The transcriptional repressor JHDM3A demethylates trimethyl histone H3 lysine 9 and lysine 36
Klose, R. J., Yamane, K., Bae, Y., Zhang, D., Erdjument‐Bromage, H., Tempst, P., Wong, J., & Zhang, Y. (2006) · Nature · doi:10.1038/nature04853 · Cited by 648
Direct interaction between DNMT1 and G9a coordinates DNA and histone methylation during replicationPreprint
Estève, P., Chin, H. G., Smallwood, A., Feehery, G. R., Gangisetty, O., Karpf, A. R., Carey, M., & Pradhan, S. (2006) · Genes & Development · doi:10.1101/gad.1463706 · Cited by 565
Neural tube defects and folate: case far from closed
Blom, H. J., Shaw, G. M., den Heijer, M., & Finnell, R. H. (2006) · Nature Reviews Neuroscience · doi:10.1038/nrn1986 · Cited by 562
Conservation of deposition-related acetylation sites in newly synthesized histones H3 and H4.
Sobel, R. E., Cook, R. G., Perry, C. A., Annunziato, A. T., & Allis, C. D. (1995) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.92.4.1237 · Cited by 513
Guan, Z., Giustetto, M., Lomvardas, S., Kim, J.-H., Miniaci, M. C., Schwartz, J. H., Thanos, D., & Kandel, E. R. (2002) · Cell · doi:10.1016/s0092-8674(02)01074-7 · Cited by 497
Integrating the MAP kinase signal into the G1 phase cell cycle machinery
Roovers, K., & Assoian, R. K. (2000) · BioEssays · doi:10.1002/1521-1878(200009)22:9 · Cited by 475
The many faces of REST oversee epigenetic programming of neuronal genes
Ballas, N., & Mandel, G. (2005) · Current Opinion in Neurobiology · doi:10.1016/j.conb.2005.08.015 · Cited by 451
A small modulatory dsRNA specifies the fate of adult neural stem cells
Kuwabara, T., Hsieh, J., Nakashima, K., Taira, K., & Gage, F. H. (2004) · Cell · doi:10.1016/s0092-8674(04)00248-x · Cited by 447
Jmjd1a and Jmjd2c histone H3 Lys 9 demethylases regulate self-renewal in embryonic stem cells
Loh, Y.-H., Zhang, W., Chen, X., George, J., & Ng, H.-H. (2007) · Genes & Development · doi:10.1101/gad.1588207 · Cited by 443
Chromatin crosstalk in development and disease: lessons from REST
Ooi, L., & Wood, I. C. (2007) · Nature Reviews Genetics · doi:10.1038/nrg2100 · Cited by 405
Altman, J., & Bayer, S. A. (1990) · The Journal of Comparative Neurology · doi:10.1002/cne.903010302 · Cited by 401
Structure and catalytic mechanism of the human histone methyltransferase SET7/9
Xiao, B., Jing, C., Wilson, J. R., Walker, P. A., Vasisht, N., Kelly, G. P., Howell, S. A., Taylor, I. A., Blackburn, G. M., & Gamblin, S. J. (2003) · Nature · doi:10.1038/nature01378 · Cited by 395
Periconceptional Dietary Intake of Choline and Betaine and Neural Tube Defects in Offspring
Shaw, G. M., Carmichael, S. L., Yang, W., Selvin, S., & Schaffer, D. (2004) · American Journal of Epidemiology · doi:10.1093/aje/kwh187 · Cited by 362
Niculescu, M. D., Craciunescu, C. N., & Zeisel, S. H. (2006) · The FASEB Journal · doi:10.1096/fj.05-4707com · Cited by 330
Self-citationMeck, W. H., & Williams, C. L. (2003) · Neuroscience & Biobehavioral Reviews · doi:10.1016/s0149-7634(03)00069-1 · Cited by 324
Localized Domains of G9a-Mediated Histone Methylation Are Required for Silencing of Neuronal Genes
Roopra, A., Qazi, R., Schoenike, B. A., Daley, T. J., & Morrison, J. F. (2004) · Molecular Cell · doi:10.1016/j.molcel.2004.05.026 · Cited by 286
Pre‐ and postnatal choline supplementation produces long‐term facilitation of spatial memory
Meck, W. H., Smith, R. A., & Williams, C. L. (1988) · Developmental Psychobiology · doi:10.1002/dev.420210405 · Cited by 269
Kovacheva, V., Mellott, T. J., Davison, J. M., Wagner, N., G.‐Coviella, I. L., Schnitzler, A. C., & Blusztajn, J. K. (2007) · Journal of Biological Chemistry · doi:10.1074/jbc.m705539200 · Cited by 225
Epigenetic control of neural stem cell fate
Hsieh, J., & Gage, F. H. (2004) · Current Opinion in Genetics & Development · doi:10.1016/j.gde.2004.07.006 · Cited by 212
Choline supplementation during prenatal development reduces proactive interference in spatial memory
Meck, W. H., & Williams, C. L. (1999) · Developmental Brain Research · doi:10.1016/s0165-3806(99)00105-4 · Cited by 193
Choline availability alters embryonic development of the hippocampus and septum in the rat
Albright, C. D., Tsai, A. Y., Friedrich, C. B., Mar, M.-H. H., & Zeisel, S. H. (1999) · Developmental Brain Research · doi:10.1016/s0165-3806(98)00183-7 · Cited by 189
Self-citationHigh Efficacy of Clonal Growth and Expansion of Adult Neural Stem Cells
Wachs, F., Couillard‐Després, S., Engelhardt, M., Wilhelm, D., Ploetz, S., Vroemen, M., Kaesbauer, J., Uyanik, G., Klucken, J., Karl, C., et al. (2003) · Laboratory Investigation · doi:10.1097/01.lab.0000075556.74231.a5 · Cited by 188
Meck, W. H., & Williams, C. L. (1997) · Neuroreport · doi:10.1097/00001756-199709080-00005 · Cited by 187
Chemoarchitectonic Atlas of the Developing Mouse Brain
Jacobowitz, D. M., & Abbott, L. C. (1997) · CRC Press eBooks · doi:10.1201/9781466593411 · Cited by 180
GeneFisher--software support for the detection of postulated genes.
Giegerich, R., Meyer, F., & Schleiermacher, C. (1996) · PubMed · Cited by 180
Mutskov, V. J., Farrell, C. M., Wade, P. A., Wolffe, A. P., & Felsenfeld, G. (2002) · Genes & Development · doi:10.1101/gad.988502 · Cited by 180
Shivapurkar, N., & Poirier, L. A. (1983) · Carcinogenesis · doi:10.1093/carcin/4.8.1051 · Cited by 173
Meck, W. H., & Williams, C. L. (1997) · Neuroreport · doi:10.1097/00001756-199709290-00009 · Cited by 171
Craciunescu, C. N., Albright, C. D., Mar, M.-H. H., Song, J., & Zeisel, S. H. (2003) · Journal of Nutrition · doi:10.1093/jn/133.11.3614 · Cited by 171
Self-citationAlbright, C. D., Friedrich, C. B., Brown, E. C., Mar, M.-H. H., & Zeisel, S. H. (1999) · Developmental Brain Research · doi:10.1016/s0165-3806(99)00057-7 · Cited by 149
Self-citationWilliams, C. L., Meck, W. H., Heyer, D., & Loy, R. (1998) · Brain Research · doi:10.1016/s0006-8993(98)00229-7 · Cited by 146
Perinatal choline supplementation increases the threshold for chunking in spatial memory
Meck, W. H., & Williams, C. L. (1997) · Neuroreport · doi:10.1097/00001756-199709290-00010 · Cited by 144
Perturbations in choline metabolism cause neural tube defects in mouse embryos in vitro
Fisher, M. C., Zeisel, S. H., Mar, M.-H. H., & Sadler, T. W. (2002) · The FASEB Journal · doi:10.1096/fj.01-0564fje · Cited by 130
Self-citationAutomethylation of G9a and its implication in wider substrate specificity and HP1 binding
Chin, H. G., Estève, P., Pradhan, M., Benner, J. S., Patnaik, D., Carey, M., & Pradhan, S. (2007) · Nucleic Acids Research · doi:10.1093/nar/gkm726 · Cited by 127
G9a and Jhdm2a Regulate Embryonic Stem Cell Fusion-Induced Reprogramming of Adult Neural Stem Cells
Ma, D. K., Chiang, C.-H. J., Ponnusamy, K. E., Ming, G., & Song, H. (2008) · Stem Cells · doi:10.1634/stemcells.2008-0388 · Cited by 120
Cell cycle and cell fate interactions in neural development
Cremisi, F., Philpott, A., & Ohnuma, S. (2003) · Current Opinion in Neurobiology · doi:10.1016/s0959-4388(03)00005-9 · Cited by 118
Effect of choline deficiency on S-adenosylmethionine and methionine concentrations in rat liver
Zeisel, S. H., Zola, T. H., daCosta, K.-A., & Pomfret, E. A. (1989) · Biochemical Journal · doi:10.1042/bj2590725 · Cited by 107
Self-citationCholine deficiency induces apoptosis in SV40‐immortalized CWSV‐1 rat hepatocytes in culture 1
Albright, C. D., Liu, R., Bethea, T. C., da Costa, K.-A., Salganik, R. I., & Zeisel, S. H. (1996) · The FASEB Journal · doi:10.1096/fasebj.10.4.8647350 · Cited by 100
Self-citationİlçöl, Y. Ö., Uncu, G., & Ulus, İ. H. (2002) · Archives of Physiology and Biochemistry · doi:10.1076/apab.110.5.393.11832 · Cited by 98
Fisher, M. C., Zeisel, S. H., Mar, M.-H. H., & Sadler, T. W. (2001) · Teratology · doi:10.1002/tera.1053 · Cited by 87
Self-citationAge- and behavior-related variation in volumes of song control nuclei in male European starlings
Bernard, D. J., Eens, M., & Ball, G. F. (1996) · Journal of Neurobiology · doi:10.1002/(sici)1097-4695(199607)30:3 · Cited by 85
Choline in the diets of the US population: NHANES, 2003–2004
Jensen, H. H., Batres-Marquez, S. P., Carriquiry, A., & Schalinske, K. L. (2007) · The FASEB Journal · doi:10.1096/fasebj.21.6.lb46-c · Cited by 78
Guest, D. J., Street, M., Jeffries, A. R., & Buckley, N. J. (2006) · Stem Cells · doi:10.1634/stemcells.2006-0207 · Cited by 72
Gene expression profiling of choline-deprived neural precursor cells isolated from mouse brain.
Niculescu, M., Craciunescu, C., & Zeisel, S. (2005) · Brain Research. Molecular Brain Research · doi:10.1016/j.molbrainres.2004.11.001 · Cited by 56
Self-citationAlbright, C. D., Siwek, D. F., Craciunescu, C. N., Mar, M.-H. H., Kowall, N. W., Williams, C. L., & Zeisel, S. H. (2003) · Nutritional Neuroscience · doi:10.1080/1028415031000084418 · Cited by 45
Self-citationZhu, X., Mar, M.-H. H., Song, J., & Zeisel, S. H. (2004) · Developmental Brain Research · doi:10.1016/j.devbrainres.2004.01.004 · Cited by 38
Self-citationAlbright, C. D., Mar, M.-H. H., Craciunescu, C. N., Song, J., & Zeisel, S. H. (2005) · Developmental Brain Research · doi:10.1016/j.devbrainres.2005.07.002 · Cited by 33
Self-citationIsolation of neural stem and precursor cells from rodent tissue.
Wu, Y.-Y., Liu, Y., Chesnut, J., & Rao, M. S. (2008) · Methods in molecular biology · doi:10.1007/978-1-59745-133-8_5 · Cited by 17
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Metadata
- Authors
- Mehedint, M. G., Niculescu, M. D., Craciunescu, C. N., & Zeisel, S. H.
- Affiliations
- University of North Carolina at Chapel Hill (US)
- Corresponding author
- Zeisel, Steven H.
- Venue
- The FASEB Journal
- Publisher
- Wiley
- Published
- 2009-09-14
- Volume
- 24
- Issue
- 1
- Pages
- 184-195
- ISSN
- 0892-6638 (ISSN-L)
- 1530-6860
- PMC
- PMC2797040
- OpenAlex
- W2070463636
- Cited by
- 167
- References
- 77
- Citations by year
- 2026: 3 · 2025: 1 · 2024: 9 · 2023: 2 · 2022: 13 · 2021: 12 · 2020: 12 · 2019: 11 · 2018: 4 · 2017: 15 · 2016: 11 · 2015: 8 · 2014: 12 · 2013: 7 · 2012: 27
- FWCI
- 6.31
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- The FASEB Journal (publishedVersion)
- Europe PMC (PubMed Central) (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Institutes of Health (AG-09525, DK-55865)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
- Health Sciences › Nursing › Nutrition and Dietetics › Folate and B Vitamins Research
- Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
- Keywords
- choline deficiency, histone H3 methylation, H3K9me1, H3K9me2, G9a, rest, neural progenitor cells, fetal hippocampus, neurogenesis, epigenetic regulation, CpG methylation, fetal development
- MeSH terms
- RE1-Silencing Transcription Factor, Animals, Base Sequence, Binding Sites, Cells, Cultured, Choline Deficiency, DNA, Female, Hippocampus, Histones, Methylation, Mice, Inbred C57BL, Mitosis, Models, Biological, Pregnancy, Promoter Regions, Genetic, Histone-Lysine N-Methyltransferase, Repressor Proteins, Apoptosis, CpG Islands, Epigenesis, Genetic, Mice, Embryonic Stem Cells, Calbindins, S100 Calcium Binding Protein G, Calbindin 1
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