Pituitary transcription factor-1 induces transient differentiation of adult hepatic stem cells into prolactin-producing cells in vivo

Eun Jig Lee, Theron Russell, Lisa Hurley, J. Larry Jameson

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

A subset of transcription factors function as pivotal regulators of cell differentiation pathways. Pituitary transcription factor-1 (Pit-1) is a tissue-specific homeodomain protein that specifies the development of pituitary somatotropes and lactotropes. In this study, adenovirus was used to deliver rat Pit-1 to mouse liver. Pit-1 expression was detected in the majority (50-80%) of hepatocyte nuclei after tail vein injection (2 × 109 plaque forming units). Pit-1 activated hepatic expression of the endogenous prolactin (PRL), GH, and TSHβ genes along with several other markers of lactotrope progenitor cells. Focal clusters (0.2-0.5% of liver cells per tissue section) of periportal cells were positive for PRL by immunofluorescent staining. The PRL-producing cells also expressed proliferating cell nuclear antigen as well as the hepatic stem cell markers (c-Kit, Thy1, and cytokeratin 14). These data indicate that Pit-1 induces the transient differentiation of hepatic progenitor cells into PRL-producing cells, providing additional evidence that transcription factors can specify the differentiation pathway of adult stem cells.

Original languageEnglish
Pages (from-to)964-971
Number of pages8
JournalMolecular Endocrinology
Volume19
Issue number4
DOIs
Publication statusPublished - 2005 Apr 1

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Adult Stem Cells
Prolactin
Hepatocytes
Transcription Factors
Stem Cells
Liver
Keratin-14
Homeodomain Proteins
Proliferating Cell Nuclear Antigen
Adenoviridae
Tail
Cell Differentiation
Veins
Staining and Labeling
Injections
Genes

All Science Journal Classification (ASJC) codes

  • Molecular Biology
  • Endocrinology

Cite this

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Pituitary transcription factor-1 induces transient differentiation of adult hepatic stem cells into prolactin-producing cells in vivo. / Lee, Eun Jig; Russell, Theron; Hurley, Lisa; Jameson, J. Larry.

In: Molecular Endocrinology, Vol. 19, No. 4, 01.04.2005, p. 964-971.

Research output: Contribution to journalArticle

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