Colorectal cancers with microsatellite instability display mRNA expression signatures characteristic of increased immunogenicity
<p>Abstract</p> <p>Background</p> <p>Colorectal cancers displaying high-degree microsatellite instability (MSI-H) have an improved prognosis compared to microsatellite stable (MSS) cancers. The observation of pronounced lymphocytic infiltrates suggests that MSI-H cancer...
Main Authors: | , , , , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
BMC
2004-08-01
|
Series: | Molecular Cancer |
Online Access: | http://www.molecular-cancer.com/content/3/1/21 |
id |
doaj-f4f5dcfabe55456bbc23408ca1bdd86e |
---|---|
record_format |
Article |
spelling |
doaj-f4f5dcfabe55456bbc23408ca1bdd86e2020-11-24T21:52:39ZengBMCMolecular Cancer1476-45982004-08-01312110.1186/1476-4598-3-21Colorectal cancers with microsatellite instability display mRNA expression signatures characteristic of increased immunogenicityBustin Stephen AFeakins RogerShaw Peter MHan XiaHuang FeiHands Rebecca EAhmed ShafiBanerjea AyanDorudi Sina<p>Abstract</p> <p>Background</p> <p>Colorectal cancers displaying high-degree microsatellite instability (MSI-H) have an improved prognosis compared to microsatellite stable (MSS) cancers. The observation of pronounced lymphocytic infiltrates suggests that MSI-H cancers are inherently more immunogenic. We aimed to compare the gene expression profiles of MSI-H and MSS cancers to provide evidence for an activated immune response in the former.</p> <p>Results</p> <p>We analysed tissue from 133 colorectal cancer patients with full consent and Local Ethics Committee approval. Genomic DNA was analysed for microsatellite instability in BAT-26. High-quality RNA was used for microarray analysis on the Affymetrix<sup>® </sup>HG-U133A chip. Data was analysed on GeneSpring software version 6.0. Confirmatory real-time RT-PCR was performed on 28 MSI-H and 26 MSS cancers. A comparison of 29 MSI-H and 104 MSS cancers identified 2070 genes that were differentially expressed between the two groups [P < 0.005]. Significantly, many key immunomodulatory genes were up-regulated in MSI-H cancers. These included antigen chaperone molecules (HSP-70, HSP-110, Calreticulin, gp96), pro-inflammatory cytokines (Interleukin (IL)-18, IL-15, IL-8, IL-24, IL-7) and cytotoxic mediators (Granulysin, Granzyme A). Quantitative RT-PCR confirmed up-regulation of HSP-70 [P = 0.016], HSP-110 [P = 0.002], IL-18 [P = 0.004], IL-8 [0.002] and Granulysin [P < 0.0001].</p> <p>Conclusions</p> <p>The upregulation of a large number of genes implicated in immune response supports the theory that MSI-H cancers are immunogenic. The novel observation of Heat Shock Protein up-regulation in MSI-H cancer is highly significant in light of the recognised roles of these proteins in innate and antigen-specific immunogenicity. Increased mRNA levels of pro-inflammatory cytokines and cytotoxic mediators also indicate an activated anti-tumour immune response.</p> http://www.molecular-cancer.com/content/3/1/21 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Bustin Stephen A Feakins Roger Shaw Peter M Han Xia Huang Fei Hands Rebecca E Ahmed Shafi Banerjea Ayan Dorudi Sina |
spellingShingle |
Bustin Stephen A Feakins Roger Shaw Peter M Han Xia Huang Fei Hands Rebecca E Ahmed Shafi Banerjea Ayan Dorudi Sina Colorectal cancers with microsatellite instability display mRNA expression signatures characteristic of increased immunogenicity Molecular Cancer |
author_facet |
Bustin Stephen A Feakins Roger Shaw Peter M Han Xia Huang Fei Hands Rebecca E Ahmed Shafi Banerjea Ayan Dorudi Sina |
author_sort |
Bustin Stephen A |
title |
Colorectal cancers with microsatellite instability display mRNA expression signatures characteristic of increased immunogenicity |
title_short |
Colorectal cancers with microsatellite instability display mRNA expression signatures characteristic of increased immunogenicity |
title_full |
Colorectal cancers with microsatellite instability display mRNA expression signatures characteristic of increased immunogenicity |
title_fullStr |
Colorectal cancers with microsatellite instability display mRNA expression signatures characteristic of increased immunogenicity |
title_full_unstemmed |
Colorectal cancers with microsatellite instability display mRNA expression signatures characteristic of increased immunogenicity |
title_sort |
colorectal cancers with microsatellite instability display mrna expression signatures characteristic of increased immunogenicity |
publisher |
BMC |
series |
Molecular Cancer |
issn |
1476-4598 |
publishDate |
2004-08-01 |
description |
<p>Abstract</p> <p>Background</p> <p>Colorectal cancers displaying high-degree microsatellite instability (MSI-H) have an improved prognosis compared to microsatellite stable (MSS) cancers. The observation of pronounced lymphocytic infiltrates suggests that MSI-H cancers are inherently more immunogenic. We aimed to compare the gene expression profiles of MSI-H and MSS cancers to provide evidence for an activated immune response in the former.</p> <p>Results</p> <p>We analysed tissue from 133 colorectal cancer patients with full consent and Local Ethics Committee approval. Genomic DNA was analysed for microsatellite instability in BAT-26. High-quality RNA was used for microarray analysis on the Affymetrix<sup>® </sup>HG-U133A chip. Data was analysed on GeneSpring software version 6.0. Confirmatory real-time RT-PCR was performed on 28 MSI-H and 26 MSS cancers. A comparison of 29 MSI-H and 104 MSS cancers identified 2070 genes that were differentially expressed between the two groups [P < 0.005]. Significantly, many key immunomodulatory genes were up-regulated in MSI-H cancers. These included antigen chaperone molecules (HSP-70, HSP-110, Calreticulin, gp96), pro-inflammatory cytokines (Interleukin (IL)-18, IL-15, IL-8, IL-24, IL-7) and cytotoxic mediators (Granulysin, Granzyme A). Quantitative RT-PCR confirmed up-regulation of HSP-70 [P = 0.016], HSP-110 [P = 0.002], IL-18 [P = 0.004], IL-8 [0.002] and Granulysin [P < 0.0001].</p> <p>Conclusions</p> <p>The upregulation of a large number of genes implicated in immune response supports the theory that MSI-H cancers are immunogenic. The novel observation of Heat Shock Protein up-regulation in MSI-H cancer is highly significant in light of the recognised roles of these proteins in innate and antigen-specific immunogenicity. Increased mRNA levels of pro-inflammatory cytokines and cytotoxic mediators also indicate an activated anti-tumour immune response.</p> |
url |
http://www.molecular-cancer.com/content/3/1/21 |
work_keys_str_mv |
AT bustinstephena colorectalcancerswithmicrosatelliteinstabilitydisplaymrnaexpressionsignaturescharacteristicofincreasedimmunogenicity AT feakinsroger colorectalcancerswithmicrosatelliteinstabilitydisplaymrnaexpressionsignaturescharacteristicofincreasedimmunogenicity AT shawpeterm colorectalcancerswithmicrosatelliteinstabilitydisplaymrnaexpressionsignaturescharacteristicofincreasedimmunogenicity AT hanxia colorectalcancerswithmicrosatelliteinstabilitydisplaymrnaexpressionsignaturescharacteristicofincreasedimmunogenicity AT huangfei colorectalcancerswithmicrosatelliteinstabilitydisplaymrnaexpressionsignaturescharacteristicofincreasedimmunogenicity AT handsrebeccae colorectalcancerswithmicrosatelliteinstabilitydisplaymrnaexpressionsignaturescharacteristicofincreasedimmunogenicity AT ahmedshafi colorectalcancerswithmicrosatelliteinstabilitydisplaymrnaexpressionsignaturescharacteristicofincreasedimmunogenicity AT banerjeaayan colorectalcancerswithmicrosatelliteinstabilitydisplaymrnaexpressionsignaturescharacteristicofincreasedimmunogenicity AT dorudisina colorectalcancerswithmicrosatelliteinstabilitydisplaymrnaexpressionsignaturescharacteristicofincreasedimmunogenicity |
_version_ |
1725875475944833024 |