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Erschienen in: Cancer Chemotherapy and Pharmacology 2/2009

01.07.2009 | Original Article

Stable XIAP knockdown clones of HCT116 colon cancer cells are more sensitive to TRAIL, taxanes and irradiation in vitro

verfasst von: Kate Connolly, Richard Mitter, Morwenna Muir, Duncan Jodrell, Sylvie Guichard

Erschienen in: Cancer Chemotherapy and Pharmacology | Ausgabe 2/2009

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Abstract

Purpose

To develop a model of X-linked inhibitor of apoptosis (XIAP) down regulation in colorectal cancer cell lines. This may be used to determine whether combination strategies have clinical potential.

Methods

A series of clones were developed using short hairpin RNA (shRNA) against XIAP stably expressed in HCT116 cells. XIAP mRNA and protein levels were established by RT-PCR and Immunoblot, respectively. GeneChip microarrays confirmed XIAP knockdown and absence of compensation by other IAP members.

Results

Four XIAP knockdown cell lines show 82–93% reduction in XIAP mRNA and 67–89% reduction in protein when compared to four luciferase control cell lines. XIAP knockdown sensitises cells to rhTRAIL by a factor of 3, to paclitaxel and docetaxel by a factor of >2 and, to a lesser extent, radiotherapy (20% enhancement).

Conclusions

Clinical trials with XIAP antisense continue, and these data suggest combination studies with agents such as rhTRAIL and taxanes should be undertaken.
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Metadaten
Titel
Stable XIAP knockdown clones of HCT116 colon cancer cells are more sensitive to TRAIL, taxanes and irradiation in vitro
verfasst von
Kate Connolly
Richard Mitter
Morwenna Muir
Duncan Jodrell
Sylvie Guichard
Publikationsdatum
01.07.2009
Verlag
Springer-Verlag
Erschienen in
Cancer Chemotherapy and Pharmacology / Ausgabe 2/2009
Print ISSN: 0344-5704
Elektronische ISSN: 1432-0843
DOI
https://doi.org/10.1007/s00280-008-0872-x

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