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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Nat+Commun
2017 ; 8
(ä): 15107
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Selective analysis of cancer-cell intrinsic transcriptional traits defines novel
clinically relevant subtypes of colorectal cancer
#MMPMID28561063
Isella C
; Brundu F
; Bellomo SE
; Galimi F
; Zanella E
; Porporato R
; Petti C
; Fiori A
; Orzan F
; Senetta R
; Boccaccio C
; Ficarra E
; Marchionni L
; Trusolino L
; Medico E
; Bertotti A
Nat Commun
2017[May]; 8
(ä): 15107
PMID28561063
show ga
Stromal content heavily impacts the transcriptional classification of colorectal
cancer (CRC), with clinical and biological implications. Lineage-dependent
stromal transcriptional components could therefore dominate over more subtle
expression traits inherent to cancer cells. Since in patient-derived xenografts
(PDXs) stromal cells of the human tumour are substituted by murine counterparts,
here we deploy human-specific expression profiling of CRC PDXs to assess
cancer-cell intrinsic transcriptional features. Through this approach, we
identify five CRC intrinsic subtypes (CRIS) endowed with distinctive molecular,
functional and phenotypic peculiarities: (i) CRIS-A: mucinous, glycolytic,
enriched for microsatellite instability or KRAS mutations; (ii) CRIS-B: TGF-?
pathway activity, epithelial-mesenchymal transition, poor prognosis; (iii)
CRIS-C: elevated EGFR signalling, sensitivity to EGFR inhibitors; (iv) CRIS-D:
WNT activation, IGF2 gene overexpression and amplification; and (v) CRIS-E:
Paneth cell-like phenotype, TP53 mutations. CRIS subtypes successfully categorize
independent sets of primary and metastatic CRCs, with limited overlap on existing
transcriptional classes and unprecedented predictive and prognostic performances.