OCT4 and downstream factors are expressed in human somatic urogenital epithelia and in culture of epididymal spheres

Karine Marie Laure Audouze, Søren Brunak, DM Kristensen, JE Nielsen, M Kalisz, MD Dalgaard, ME Larsen, GK Jacobsen, T Horn, NE Skakkebaek, H Leffers

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    The transcription factor OCT4 plays a crucial role in the earliest differentiation of the mammalian embryo and in self-renewal of embryonic stem cells. However, it remains controversial whether this gene is also expressed in somatic tissues. Here we use a combination of RT-PCR on whole and microdissected tissues, in situ hybridisation, immunohistochemistry, and Western blotting to show that OCT4 and SOX2 together with downstream targets, UTF1 and REX1, are expressed in the human male urogenital tract. We further supported these results by analysis of DNA methylation of a region in the OCT4 promoter. In culture, human primary epididymis cells formed spheres that continued to express the investigated genes for at least 20 days. Transcriptomic analysis of cultured cells showed up-regulation of CD29, CD44, and CD133 that are normally associated with sphere-forming cancer stem cells. Furthermore, stimulation with retinoic acid resulted in down-regulation of OCT4 expression, however, without multilineage differentiation. Our results show that OCT4 and associated genes are expressed in somatic epithelial cells from the urogenital tract and that these cells can form spheres, a general marker of stem cell behaviour.
    Original languageEnglish
    JournalMolecular Human Reproduction
    Volume16
    Issue number11
    Pages (from-to)835-845
    ISSN1360-9947
    DOIs
    Publication statusPublished - 2010

    Keywords

    • epididymal sphere
    • prostate
    • epididymis
    • OCT4
    • CD133

    Cite this

    Audouze, K. M. L., Brunak, S., Kristensen, DM., Nielsen, JE., Kalisz, M., Dalgaard, MD., Larsen, ME., Jacobsen, GK., Horn, T., Skakkebaek, NE., & Leffers, H. (2010). OCT4 and downstream factors are expressed in human somatic urogenital epithelia and in culture of epididymal spheres. Molecular Human Reproduction, 16(11), 835-845. https://doi.org/10.1093/molehr/gaq008