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image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Cancer Lettersarrow_drop_down
image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
Cancer Letters
Article . 2014 . Peer-reviewed
License: Elsevier TDM
Data sources: Crossref
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LRH1 promotes pancreatic cancer metastasis

Authors: Qiushi, Lin; Arihiro, Aihara; Waihong, Chung; Yu, Li; Xuesong, Chen; Zheping, Huang; Shaofan, Weng; +4 Authors
Abstract

The transcriptional factor liver receptor homolog 1 (LRH1) regulates pancreatic development, and may participate in pancreatic oncogenesis through activation of growth factor signaling transduction cascades. We measured transcriptional activity of β-catenin in response to LRH1 stimulation by a Topflash reporter assay. The pancreatic cancer (PC) phenotype was then characterized by cell migration, wound healing, invasion, and sphere formation in vitro, as well as tumor formation and distant metastatic spread in vivo. We compared results between vector control and LRH1-overexpressing stable PC cell lines. In addition, tumor burden, angiogenesis, histologic characteristics, and hepatic spread were assessed in orthotopic and experimental liver metastatic murine models. Expression of downstream LRH1 related genes was evaluated by Western blot and immunohistochemistry in PC cell lines and human tumor specimens. Specific inhibition of LRH1 expression and function was accomplished by shRNAs "knockdown" experiments. It was found that LRH1 enhanced transcriptional activity of β-catenin and the expression of downstream target genes (c-Myc, MMP2/9), as well as promoted migration, wound healing, invasion, and sphere formation of PC cell lines. Specific inhibition of LRH1 by shRNAs reduced cell migration, invasion, sphere formation and expression of c-Myc and MMP2/9 target genes. Mice injected with LRH1 overexpressing stable PC cells developed tumors with increased size and exhibited striking hepatic metastatic spread. More important, LRH1 was overexpressed in PC tumors compared to adjacent normal pancreas. Our findings demonstrate that LRH1 overexpression is associated with increased PC growth and metastatic spread, indicating that LRH1-targeted therapy could inhibit tumor progression.

Keywords

Male, Mice, Inbred BALB C, Transcription, Genetic, Mice, Nude, Receptors, Cytoplasmic and Nuclear, Gene Expression Regulation, Neoplastic, Pancreatic Neoplasms, Proto-Oncogene Proteins c-myc, Mice, Matrix Metalloproteinase 9, Cell Movement, Spheroids, Cellular, Animals, Humans, Matrix Metalloproteinase 2, Neoplasm Invasiveness, RNA Interference, Neoplasm Metastasis, RNA, Small Interfering, Signal Transduction

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
38
Top 10%
Top 10%
Top 10%
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