Cited by 346Sperm and Testicular FunctionEpigenetics and DNA MethylationGenomics and Chromatin Dynamics

Chromatin and Transcription Transitions of Mammalian Adult Germline Stem Cells and Spermatogenesis

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Hammoud, Saher Sue, Low, Diana H.P., Yi, Chongil, Carrell, Douglas T., Guccione, Ernesto, Cairns, Bradley R.·2014·Cell Stem Cell

Abstract

Adult germline stem cells (AGSCs) self-renew (Thy1(+) enriched) or commit to gametogenesis (Kit(+) enriched). To better understand how chromatin regulates AGSC biology and gametogenesis, we derived stage-specific high-resolution profiles of DNA methylation, 5hmC, histone modifications/variants, and RNA-seq in AGSCs and during spermatogenesis. First, we define striking signaling and transcriptional differences between AGSC types, involving key self-renewal and proliferation pathways. Second, key pluripotency factors (e.g., Nanog) are silent in AGSCs and bear particular chromatin/DNAme attributes that may "poise" them for reactivation after fertilization. Third, AGSCs display chromatin "poising/bivalency" of enhancers and promoters for embryonic transcription factors. Remarkably, gametogenesis occurs without significant changes in DNAme and instead involves transcription of DNA-methylated promoters bearing high RNAPol2, H3K9ac, H3K4me3, low CG content, and (often) 5hmC. Furthermore, key findings were confirmed in human sperm. Here, we reveal AGSC signaling asymmetries and chromatin/DNAme strategies in AGSCs to poise key transcription factors and to activate DNA-methylated promoters during gametogenesis.

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Crossref · 10.1016/j.stem.2014.04.006

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  • Many genes are expressed during spermatogenesis despite high methylation at their promoters.

    “and numerous genes are expressed during spermatogenesis despite high level methylation at their promoters (18).”

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Authors
Hammoud, S. S., Low, D. H. P., Yi, C., Carrell, D. T., Guccione, E., & Cairns, B. R.
Affiliations
  • Howard Hughes Medical Institute (US)
  • Agency for Science, Technology and Research (SG)
  • University of Utah (US)
Corresponding author
  • Guccione, Ernesto
  • Cairns, Bradley R.
Venue
Cell Stem Cell
Publisher
Elsevier BV
Published
2014-08
Volume
15
Issue
2
Pages
239-253
ISSN
  • 1875-9777 (ISSN-L)
  • 1934-5909
OpenAlex
W1994950146
Cited by
346
References
46
Citations by year
2026: 12 · 2025: 32 · 2024: 19 · 2023: 27 · 2022: 34 · 2021: 31 · 2020: 33 · 2019: 39 · 2018: 25 · 2017: 35 · 2016: 27 · 2015: 26 · 2014: 6
FWCI
37.95
Type
journal article
Language
en
Open access
Locations
  • Cell stem cell (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Howard Hughes Medical Institute
  • National Cancer Institute (CA24014)
Topics
  • Health Sciences › Medicine › Reproductive Medicine › Sperm and Testicular Function
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
Keywords
spermatogenesis, chromatin regulation, DNA methylation, 5-hydroxymethylcytosine, histone modifications, histone variants, bivalent promoters, enhancers, Nanog, pluripotency factors, self-renewal, human spermatozoa
MeSH terms
Animals, Cell Differentiation, Cell Separation, Chromatin, Enhancer Elements, Genetic, Flow Cytometry, Histones, Humans, Male, Mice, Inbred C57BL, Promoter Regions, Genetic, Spermatogenesis, Spermatozoa, Time Factors, Transcription, Genetic, Signal Transduction, DNA Methylation, Gene Expression Profiling, Genomics, Mice, Embryonic Stem Cells, Adult Stem Cells

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