The DOI matches its Crossref record; 76 of the 76 references it cites were found in a registry or an index.
Targeted in vivo expression of the cyclin-dependent kinase inhibitor p21 halts hepatocyte cell-cycle progression, postnatal liver development and regeneration.
Open accessAbstract
The CDK inhibitor p21 (WAF-1/CIP-1/SDI-1) has been implicated in DNA damage-induced p53-mediated G1 arrest, as well as in physiological processes, such as cell differentiation and senescence, that do not involve p53 function. To determine the impact of p21 on normal development and cell-cycle regulation in vivo, we have generated transgenic mice that abundantly express p21 specifically in hepatocytes. During postnatal liver development, when transgenic p-21 protein becomes detectable, hepatocyte proliferation is inhibited dramatically. This disturbance causes a reduction in the overall number of adult hepatocytes, resulting in aberrant tissue organization, runted liver and body growth, and increased mortality. The transgenic p21 protein is associated with most, if not all, of the cyclin D1-CDK4 in liver but not significantly with other cyclin/CDK proteins, indicating the importance of cyclin D1-CDK4 function in normal liver development. The appearance of large polyploid nuclei in some hepatocytes indicates that p21 may also cause arrest during the G2 phase of the cell cycle. Significantly, partial hepatectomy failed to stimulate hepatocytes to proliferate in p21 transgenic animals. These results provide the first in vivo evidence that appropriate p21 levels are critical in normal development and further implicate p21 in the control of multiple cell-cycle phases.
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“The proliferation of p21 positive hepatocytes is irreversibly inhibited49 making it unlikely that p21 positive hepatocytes contribute to regeneration here.”
From Hepatic progenitor cells of biliary origin with liver repopulation capacity (2015) · cites this paper as [49]
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Metadata
- Authors
- Wu, H., Wade, M., Krall, L., Grisham, J., Xiong, Y., & Van Dyke, T.
- Affiliations
- University of North Carolina at Chapel Hill (US)
- Venue
- Genes & Development
- Publisher
- Cold Spring Harbor Laboratory
- Published
- 1996-02-01
- Volume
- 10
- Issue
- 3
- Pages
- 245-260
- ISSN
- 0890-9369 (ISSN-L)
- 1549-5477
- OpenAlex
- W4300612151
- Cited by
- 234
- References
- 75
- Citations by year
- 2026: 1 · 2025: 1 · 2024: 2 · 2022: 4 · 2021: 2 · 2020: 2 · 2019: 2 · 2018: 3 · 2017: 7 · 2016: 4 · 2015: 5 · 2014: 2 · 2013: 4 · 2012: 1
- Type
- posted content
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Genes & Development (publishedVersion)
- PubMed (publishedVersion)
- Carolina Digital Repository (University of North Carolina at Chapel Hill) (submittedVersion)
- UNC Libraries
- Funders
- National Institutes of Health (5r01dk042910-04)
- National Cancer Institute (R01CA065572, CA 65572, R01CA046283, CA-46283)
- National Institute of Diabetes and Digestive and Kidney Diseases (DK-42910)
- Topics
- Health Sciences › Medicine › Hepatology › Liver physiology and pathology
- Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
- Keywords
- p21, cyclin-dependent kinase inhibitors, hepatocytes, postnatal liver development, liver regeneration, cell cycle arrest, cyclin D1/CDK4, hepatocyte proliferation, transgenic mice, partial hepatectomy, G2 cell cycle arrest, polyploidy, p53-independent function
- MeSH terms
- Animals, Base Sequence, Cell Cycle, Cell Division, DNA, Enzyme Inhibitors, Hepatectomy, Liver, Liver Regeneration, Mice, Transgenic, Molecular Sequence Data, Prealbumin, Proto-Oncogene Proteins, Oncogene Proteins, Cyclins, Gene Targeting, Cyclin-Dependent Kinases, Cyclin D1, Cyclin-Dependent Kinase Inhibitor p21, Cyclin-Dependent Kinase 4, Mice
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