Isolation of primary human colon tumor cells from surgical tissues and culturing them directly on soft elastic substrates for traction cytometry

M. Yakut Ali, Sandeep V. Anand, Krishnarao Tangella, Davendra Ramkumar, Taher A. Saif

Research output: Contribution to journalArticle

Abstract

Cancer cells respond to matrix mechanical stiffness in a complex manner using a coordinated, hierarchical mechano-chemical system composed of adhesion receptors and associated signal transduction membrane proteins, the cytoskeletal architecture, and molecular motors1, 2. Mechanosensitivity of different cancer cells in vitro are investigated primarily with immortalized cell lines or murine derived primary cells, not with primary human cancer cells. Hence, little is known about the mechanosensitivity of primary human colon cancer cells in vitro. Here, an optimized protocol is developed that describes the isolation of primary human colon cells from healthy and cancerous surgical human tissue samples. Isolated colon cells are then successfully cultured on soft (2 kPa stiffness) and stiff (10 kPa stiffness) polyacrylamide hydrogels and rigid polystyrene (~3.6 GPa stiffness) substrates functionalized by an extracellular matrix (fibronectin in this case). Fluorescent microbeads are embedded in soft gels near the cell culture surface, and traction assay is performed to assess cellular contractile stresses using free open access software. In addition, immunofluorescence microscopy on different stiffness substrates provides useful information about primary cell morphology, cytoskeleton organization and vinculin containing focal adhesions as a function of substrate rigidity.

Original languageEnglish (US)
Article numbere52532
JournalJournal of Visualized Experiments
Volume2015
Issue number100
DOIs
StatePublished - Jun 4 2015

Keywords

  • Bioengineering
  • Cell mechanics
  • Immunofluorescence microscopy
  • Issue 100
  • Mechanobiology
  • Primary human colon tumor cells
  • Soft elastic substrates
  • Traction force microscopy

ASJC Scopus subject areas

  • Neuroscience(all)
  • Chemical Engineering(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Immunology and Microbiology(all)

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