西亚试剂：Oct4 Expression Is Not Required for Mouse Somatic Stem Cell

发布时间：2025-09-28

Oct4 Expression Is Not Required for Mouse Somatic Stem Cell Self-Renewal

Christopher J. Lengner,1 Fernando D. Camargo,1 Konrad Hochedlinger,3 G. Grant Welstead,1 Samir Zaidi,2 Sumita Gokhale,1 Hans R. Scholer,4 Alexey Tomilin,5 and Rudolf Jaenisch1,2,

1 Whitehead Institute for Biomedical Research, Massachusetts Institute of Technology, 9 Cambridge Center, Cambridge, MA 02142, USA
2 Department of Biology, Massachusetts Institute of Technology, 9 Cambridge Center, Cambridge, MA 02142, USA
3 Massachusetts General Hospital Cancer Center and Center for Regenerative Medicine, Harvard Stem Cell Institute, 185 Cambridge Street, Boston, MA 02114, USA
4 Department of Cell and Developmental Biology, Max Planck Institute for Molecular Biomedicine, Röntgenstrasse 20, 48149 Münster, Germany
5 Institute of Cytology, Russian Academy of Science, 4 Tikhoretski Avenue, 194064 St-Petersburg, Russia

Corresponding author
Rudolf Jaenisch
Summary

The Pou domain containing transcription factor Oct4 is a well-established regulator of pluripotency in the inner cell mass of the mammalian blastocyst as well as in embryonic stem cells. While it has been shown that the Oct4 gene is inactivated through a series of epigenetic modifications following implantation, recent studies have detected Oct4 activity in a variety of somatic stem cells and tumor cells. Based on these observations it has been suggested that Oct4 may also function in maintaining self-renewal of somatic stem cells and, in addition, may promote tumor formation. We employed a genetic approach to determine whether Oct4 is important for maintaining pluripotency in the stem cell compartments of several somatic tissues, including the intestinal epithelium, bone marrow (hematopoietic and mesenchymal lineages), hair follicle, brain, and liver. Oct4 gene ablation in these tissues revealed no abnormalities in homeostasis or regenerative capacity. We conclude that Oct4 is dispensable for both self-renewal and maintenance of somatic stem cells in the adult mammal.

 

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