DR5 receptor mediates anoikis in human colorectal carcinoma cell lines

Luciana M. Laguinge, Raed N. Samara, Wenge Wang, Wafik S. El-Deiry, Georgia Corner, Leonard H. Augenlicht, Lopa Mishra, J. Milburn Jessup

Research output: Contribution to journalArticle

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Abstract

As human colorectal cancer (CRC) cells metastasize to distant sites, they are susceptible to detachment-induced cell death or anoikis - a form of apoptosis that occurs when anchorage-dependent CRC cells go into suspension. Our goal was to identify whether tumor necrosis factor receptor apoptosis-inducing ligand (TRAIL) receptors mediate anoikis in human CRC cells. First, we assessed whether caspases of the extrinsic (caspase-8) or intrinsic (caspase-9) death pathways were involved. Caspase-8 was cleaved during exposure to suspension culture in four CRC lines, and cell death was inhibited by caspase-3 and caspase-8 inhibitors but not by a caspase-9 inhibitor. Gene transcripts in macrophage inflammatory protein-101 (MIP-110), a weakly metastatic human CRC, were increased at least 2-fold for TRAIL-R2 (DR5) and TRAIL after 24 h of suspension culture compared with cells in monolayer culture. The increased expression of DR5 was confirmed at the protein level at 24 h, and exposure of MIP-101 cells to an antagonistic antibody to DR5 decreased caspase-8 activation. The antagonistic antibody to DR5 inhibited anoikis in four human CRC lines. Treatment with an antagonistic DR4 antibody or a neutralizing antibody to TRAIL ligand did not reduce anoikis consistently. Knockdown of DR5 or TRAIL also inhibited anoikis, whereas exogenous TRAIL or FasL did not consistently increase anoikis. In summary, DR5 receptor mediates death signals for anoikis in human CRC cells through the extrinsic apoptotic pathway.

Original languageEnglish (US)
Pages (from-to)909-917
Number of pages9
JournalCancer Research
Volume68
Issue number3
DOIs
StatePublished - Feb 1 2008

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Anoikis
TNF-Related Apoptosis-Inducing Ligand Receptors
Colorectal Neoplasms
Caspase 8
Cell Line
Suspensions
Caspase Inhibitors
Caspase 9
Antibodies
Cell Death
Apoptosis
Ligands
Macrophage Inflammatory Proteins
Tumor Necrosis Factor Receptors
Caspases
Neutralizing Antibodies
Caspase 3

ASJC Scopus subject areas

  • Cancer Research
  • Oncology

Cite this

Laguinge, L. M., Samara, R. N., Wang, W., El-Deiry, W. S., Corner, G., Augenlicht, L. H., ... Jessup, J. M. (2008). DR5 receptor mediates anoikis in human colorectal carcinoma cell lines. Cancer Research, 68(3), 909-917. https://doi.org/10.1158/0008-5472.CAN-06-1806

DR5 receptor mediates anoikis in human colorectal carcinoma cell lines. / Laguinge, Luciana M.; Samara, Raed N.; Wang, Wenge; El-Deiry, Wafik S.; Corner, Georgia; Augenlicht, Leonard H.; Mishra, Lopa; Jessup, J. Milburn.

In: Cancer Research, Vol. 68, No. 3, 01.02.2008, p. 909-917.

Research output: Contribution to journalArticle

Laguinge, LM, Samara, RN, Wang, W, El-Deiry, WS, Corner, G, Augenlicht, LH, Mishra, L & Jessup, JM 2008, 'DR5 receptor mediates anoikis in human colorectal carcinoma cell lines', Cancer Research, vol. 68, no. 3, pp. 909-917. https://doi.org/10.1158/0008-5472.CAN-06-1806
Laguinge, Luciana M. ; Samara, Raed N. ; Wang, Wenge ; El-Deiry, Wafik S. ; Corner, Georgia ; Augenlicht, Leonard H. ; Mishra, Lopa ; Jessup, J. Milburn. / DR5 receptor mediates anoikis in human colorectal carcinoma cell lines. In: Cancer Research. 2008 ; Vol. 68, No. 3. pp. 909-917.
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