Cited by 215Cancer-related Molecular PathwaysMicrotubule and mitosis dynamicsDevelopmental Biology and Gene Regulation

Cyclin A Is Redundant in Fibroblasts but Essential in Hematopoietic and Embryonic Stem Cells

Open access
Kalaszczynska, Ilona, Geng, Yan, Iino, Tadafumi, Mizuno, Shin-ichi, Choi, Yoon, Kondratiuk, Ilona, Silver, Daniel P., Wolgemuth, Debra J. +2 more·2009·Cell

Abstract

Cyclins are regulatory subunits of cyclin-dependent kinases. Cyclin A, the first cyclin ever cloned, is thought to be an essential component of the cell-cycle engine. Mammalian cells encode two A-type cyclins, testis-specific cyclin A1 and ubiquitously expressed cyclin A2. Here, we tested the requirement for cyclin A function using conditional knockout mice lacking both A-type cyclins. We found that acute ablation of cyclin A in fibroblasts did not affect cell proliferation, but led to prolonged expression of another cyclin, cyclin E, across the cell cycle. However, combined ablation of all A- and E-type cyclins extinguished cell division. In contrast, cyclin A function was essential for cell-cycle progression of hematopoietic and embryonic stem cells. Expression of cyclin A is particularly high in these compartments, which might render stem cells dependent on cyclin A, whereas in fibroblasts cyclins A and E play redundant roles in cell proliferation.

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Crossref · 10.1016/j.cell.2009.04.062

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  • HSCs lacking cyclin A2 cannot proliferate in vitro, indicating cyclin A2 is essential for HSC proliferation.

    “HSCs that lack cyclin A2 are unable to proliferate in vitro, indicating the essential role of cyclin A2 in HSC proliferation48.”

    From Molecular regulation of stem cell quiescence (2013) · cites this paper as [48]

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Research works printed but not linked: 1

  1. Guadagno TM Ohtsubo M Roberts JM Assoian RK A link between cyclin A expression and adhesion-dependent cell cycle progression [published erratum appears in Science 1994 Jan 28; 263(5146):455] Science 1993 262 1572 1575 8248807

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Authors
Kalaszczynska, I., Geng, Y., Iino, T., Mizuno, S.-I., Choi, Y., Kondratiuk, I., Silver, D. P., Wolgemuth, D. J., Akashi, K., & Sicinski, P.
Affiliations
  • Harvard University (US)
  • Columbia University Irving Medical Center (US)
Venue
Cell
Publisher
Elsevier BV
Published
2009-07
Volume
138
Issue
2
Pages
352-365
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2039543791
Cited by
215
References
47
Citations by year
2026: 4 · 2025: 5 · 2024: 5 · 2023: 8 · 2022: 6 · 2021: 17 · 2020: 12 · 2019: 9 · 2018: 12 · 2017: 15 · 2016: 12 · 2015: 12 · 2014: 13 · 2013: 19 · 2012: 29
FWCI
10.98
Type
journal article
Language
en
Open access
Locations
  • Cell (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health
  • National Cancer Institute (R01CA132740, R01CA108950)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (R01HD034915)
Topics
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Microtubule and mitosis dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
Keywords
cyclin A, cyclin A1, cyclin A2, cyclin E, cyclin-dependent kinases, cell cycle, fibroblasts, hematopoietic stem cells, embryonic stem cells, conditional knockout mice, cell proliferation, functional redundancy
MeSH terms
Animals, Embryo, Mammalian, Fibroblasts, Hematopoietic Stem Cells, Mice, Knockout, Cyclin A, Cyclin E, Mice, Embryonic Stem Cells

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