Inactivation of LGI1 expression accompanies early stage hyperplasia of prostate epithelium in the TRAMP murine model of prostate cancer

John Kenneth Cowell, Karen Head, Padmaja Kunapuli, Mary Vaughan, Ellen Karasik, Barbara Foster

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The LGI1 gene has been implicated in tumor cell invasion through regulation of the ERK pathway. To determine whether human prostate cancer cells (PC3, 22RV, Du145) are similarly affected by exposure to LGI1, we conducted scratch wound assays and demonstrated that the secreted LGI1 protein can reduce cell motility, an essential component of invasion and metastasis. These studies have now been extended to an in vivo mouse model of prostate cancer. Using a BAC transgenic mouse expressing a GFP reporter gene under the control of cis regulatory elements, we demonstrated that LGI1 is highly expressed in the normal prostate epithelium. To determine whether loss of LGI1 expression is associated with development and progression of murine prostate cancer, we bred the GFP reporter BAC transgenic mice with TRAMP mice which undergo early hyperplasia and progressive stages of prostate cancer. In the F1 animals, although the surrounding normal prostate epithelium expressed high levels of LGI1 in the double transgenic mice, the LGI1 gene had been inactivated even at the earliest stages of hyperplasia. This observation supports the suggestion that inactivation of LGI1 in certain cell types is related to tumor progression. Taken together these results suggest that LGI1 may be an important molecule for the arrest of prostate cancer cell invasion and possibly as a biomarker for early detection of prostate hyperplasia.

Original languageEnglish (US)
Pages (from-to)77-81
Number of pages5
JournalExperimental and Molecular Pathology
Volume88
Issue number1
DOIs
StatePublished - Feb 1 2010

Fingerprint

Hyperplasia
Prostate
Prostatic Neoplasms
Epithelium
Genes
Cells
Tumors
Transgenic Mice
Biomarkers
Assays
Animals
MAP Kinase Signaling System
Molecules
Reporter Genes
Cell Movement
Neoplasms
Neoplasm Metastasis
Proteins
Wounds and Injuries

Keywords

  • Gene inactivation
  • LGI1
  • Prostate cancer
  • TRAMP mouse
  • Tumor development

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Molecular Biology
  • Clinical Biochemistry

Cite this

Inactivation of LGI1 expression accompanies early stage hyperplasia of prostate epithelium in the TRAMP murine model of prostate cancer. / Cowell, John Kenneth; Head, Karen; Kunapuli, Padmaja; Vaughan, Mary; Karasik, Ellen; Foster, Barbara.

In: Experimental and Molecular Pathology, Vol. 88, No. 1, 01.02.2010, p. 77-81.

Research output: Contribution to journalArticle

Cowell, John Kenneth ; Head, Karen ; Kunapuli, Padmaja ; Vaughan, Mary ; Karasik, Ellen ; Foster, Barbara. / Inactivation of LGI1 expression accompanies early stage hyperplasia of prostate epithelium in the TRAMP murine model of prostate cancer. In: Experimental and Molecular Pathology. 2010 ; Vol. 88, No. 1. pp. 77-81.
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