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Prognostic role of the LCS6 KRAS variant in locally advanced rectal cancer : results of the EXPERT-C trial

Sclafani, F. (författare)
Royal Marsden NHS Fdn Trust, Dept Med, London, England.;Royal Marsden NHS Fdn Trust, Dept Med, Surrey, England.
Chau, I. (författare)
Royal Marsden NHS Fdn Trust, Dept Med, London, England.;Royal Marsden NHS Fdn Trust, Dept Med, Surrey, England.
Cunningham, D. (författare)
Royal Marsden NHS Fdn Trust, Dept Med, London, England.;Royal Marsden NHS Fdn Trust, Dept Med, Surrey, England.
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Peckitt, C. (författare)
Royal Marsden NHS Fdn Trust, Dept Med, London, England.;Royal Marsden NHS Fdn Trust, Dept Med, Surrey, England.
Lampis, A. (författare)
Inst Canc Res, Div Mol Pathol, London, England.;Inst Canc Res, Div Mol Pathol, Sutton, Surrey, England.
Hahne, J. C. (författare)
Inst Canc Res, Div Mol Pathol, London, England.;Inst Canc Res, Div Mol Pathol, Sutton, Surrey, England.
Braconi, C. (författare)
Royal Marsden NHS Fdn Trust, Dept Med, London, England.;Royal Marsden NHS Fdn Trust, Dept Med, Surrey, England.;Inst Canc Res, Div Canc Therapeut, London, England.;Inst Canc Res, Div Canc Therapeut, Sutton, Surrey, England.
Tabernero, J. (författare)
Univ Autonoma Barcelona, Vall Hebron Univ Hosp, Dept Med Oncol, E-08193 Barcelona, Spain.
Glimelius, Bengt (författare)
Uppsala universitet,Experimentell och klinisk onkologi
Cervantes, A. (författare)
Univ Valencia, Biomed Res Inst INCLIVA, Dept Hematol & Med Oncol, Valencia, Spain.
Begum, R. (författare)
Royal Marsden NHS Fdn Trust, Dept Med, London, England.;Royal Marsden NHS Fdn Trust, Dept Med, Surrey, England.
De Castro, D. Gonzalez (författare)
Royal Marsden NHS Fdn Trust, Dept Med, London, England.;Royal Marsden NHS Fdn Trust, Dept Med, Surrey, England.
Wilson, S. Hulkki (författare)
Royal Marsden NHS Fdn Trust, Dept Med, London, England.;Royal Marsden NHS Fdn Trust, Dept Med, Surrey, England.
Eltahir, Z. (författare)
Royal Marsden NHS Fdn Trust, Dept Med, London, England.;Royal Marsden NHS Fdn Trust, Dept Med, Surrey, England.
Wotherspoon, A. (författare)
Royal Marsden NHS Fdn Trust, Dept Med, London, England.;Royal Marsden NHS Fdn Trust, Dept Med, Surrey, England.
Tait, D. (författare)
Royal Marsden NHS Fdn Trust, Dept Med, London, England.;Royal Marsden NHS Fdn Trust, Dept Med, Surrey, England.
Brown, G. (författare)
Royal Marsden NHS Fdn Trust, Dept Med, London, England.;Royal Marsden NHS Fdn Trust, Dept Med, Surrey, England.
Oates, J. (författare)
Royal Marsden NHS Fdn Trust, Dept Med, London, England.;Royal Marsden NHS Fdn Trust, Dept Med, Surrey, England.
Valeri, N. (författare)
Royal Marsden NHS Fdn Trust, Dept Med, London, England.;Royal Marsden NHS Fdn Trust, Dept Med, Surrey, England.;Inst Canc Res, Div Mol Pathol, London, England.;Inst Canc Res, Div Mol Pathol, Sutton, Surrey, England.
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Royal Marsden NHS Fdn Trust, Dept Med, London, England;Royal Marsden NHS Fdn Trust, Dept Med, Surrey, England. Inst Canc Res, Div Mol Pathol, London, England.;Inst Canc Res, Div Mol Pathol, Sutton, Surrey, England. (creator_code:org_t)
Elsevier BV, 2015
2015
Engelska.
Ingår i: Annals of Oncology. - : Elsevier BV. - 0923-7534 .- 1569-8041. ; 26:9, s. 1936-1941
Relaterad länk:
https://doi.org/10.1...
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https://doi.org/10.1...
https://urn.kb.se/re...
https://doi.org/10.1...
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  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
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  • Lethal-7 (let-7) is a tumour suppressor miRNA which acts by down-regulating several oncogenes including KRAS. A single-nucleotide polymorphism (rs61764370, T > G base substitution) in the let-7 complementary site 6 (LCS-6) of KRAS mRNA has been shown to predict prognosis in early-stage colorectal cancer (CRC) and benefit from anti-epidermal growth factor receptor monoclonal antibodies in metastatic CRC. We analysed rs61764370 in EXPERT-C, a randomised phase II trial of neoadjuvant CAPOX followed by chemoradiotherapy, surgery and adjuvant CAPOX plus or minus cetuximab in locally advanced rectal cancer. DNA was isolated from formalin-fixed paraffin-embedded tumour tissue and genotyped using a PCR-based commercially available assay. Kaplan-Meier method and Cox regression analysis were used to calculate survival estimates and compare treatment arms. A total of 155/164 (94.5%) patients were successfully analysed, of whom 123 (79.4%) and 32 (20.6%) had the LCS-6 TT and LCS-6 TG genotype, respectively. Carriers of the G allele were found to have a statistically significantly higher rate of complete response (CR) after neoadjuvant therapy (28.1% versus 10.6%; P = 0.020) and a trend for better 5-year progression-free survival (PFS) [77.4% versus 64.5%: hazard ratio (HR) 0.56; P = 0.152] and overall survival (OS) rates (80.3% versus 71.9%: HR 0.59; P = 0.234). Both CR and survival outcomes were independent of the use of cetuximab. The negative prognostic effect associated with KRAS mutation appeared to be stronger in patients with the LCS-6 TT genotype (HR PFS 1.70, P = 0.078; HR OS 1.79, P = 0.082) compared with those with the LCS-6 TG genotype (HR PFS 1.33, P = 0.713; HR OS 1.01, P = 0.995). This analysis suggests that rs61764370 may be a biomarker of response to neoadjuvant treatment and an indicator of favourable outcome in locally advanced rectal cancer possibly by mitigating the poor prognosis of KRAS mutation. In this setting, however, this polymorphism does not appear to predict cetuximab benefit.

Ämnesord

MEDICIN OCH HÄLSOVETENSKAP  -- Klinisk medicin -- Cancer och onkologi (hsv//swe)
MEDICAL AND HEALTH SCIENCES  -- Clinical Medicine -- Cancer and Oncology (hsv//eng)

Nyckelord

LCS-6 KRAS variant
single-nucleotide polymorphism
let-7
KRAS
cetuximab
rectal cancer

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