Ovarian normal and tumor-associated fibroblasts retain in vivo stromal characteristics in a 3-D matrix-dependent manner

Roderick M. Quiros, Matthildi Valianou, Youngjoo Kwon, Kimberly M. Brown, Andrew K. Godwin, Edna Cukierman

Research output: Contribution to journalArticle

38 Scopus citations

Abstract

Objective: Due to a lack of experimental systems, little is known about ovarian stroma. Here, we introduce an in vivo-like 3-D system of mesenchymal stromal progression during ovarian tumorigenesis to support the study of stroma permissiveness in human ovarian neoplasias. Methods: To sort 3-D cultures into 'normal,' 'primed' and 'activated' stromagenic stages, 29 fibroblastic cell lines from 5 ovarian tumor samples (tumor ovarian fibroblasts, TOFs) and 14 cell lines from normal prophylactic oophorectomy samples (normal ovarian fibroblasts, NOFs) were harvested and characterized for their morphological, biochemical and 3-D culture features. Results: Under 2-D conditions, cells displayed three distinct morphologies: spread, spindle, and intermediate. We found that spread and spindle cells have similar levels of α-SMA, a desmoplastic marker, and consistent ratios of pFAKY397/totalFAK. In 3-D intermediate cultures, α-SMA levels were virtually undetectable while pFAKY397/totalFAK ratios were low. In addition, we used confocal microscopy to assess in vivo-like extracellular matrix topography, nuclei morphology and α-SMA features in the 3-D cultures. We found that all NOFs presented 'normal' characteristics, while TOFs presented both 'primed' and 'activated' features. Moreover, immunohistochemistry analyses confirmed that the 3-D matrix-dependent characteristics are reminiscent of those observed in in vivo stromal counterparts. Conclusions: We conclude that primary human ovarian fibroblasts maintain in vivo-like (staged) stromal characteristics in a 3-D matrix-dependent manner. Therefore, our stromal 3-D system offers a tool that can enhance the understanding of both stromal progression and stroma-induced ovarian tumorigenesis. In the future, this system could also be used to develop ovarian stroma-targeted therapies.

Original languageEnglish (US)
Pages (from-to)99-109
Number of pages11
JournalGynecologic Oncology
Volume110
Issue number1
DOIs
StatePublished - Jul 1 2008

Keywords

  • 3-D culture
  • Extracellular matrix
  • Tumor stroma
  • Tumor-associated fibroblasts

ASJC Scopus subject areas

  • Oncology
  • Obstetrics and Gynecology

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