Abstract:
:Lung cancer is the most frequent cause of cancer-related death world-wide. Radiotherapy alone or in conjunction with chemotherapy is the standard treatment for locally advanced non-small cell lung cancer (NSCLC). Currently there is no predictive marker with clinical utility to guide treatment decisions in NSCLC patients undergoing radiotherapy. Identification of such markers would allow treatment options to be considered for more effective therapy. To enable the identification of appropriate protein biomarkers, plasma samples were collected from patients with non-small cell lung cancer before and during radiotherapy for longitudinal comparison following a protocol that carries sufficient power for effective discovery proteomics. Plasma samples from patients pre- and during radiotherapy who had survived > 18 mo were compared to the same time points from patients who survived < 14 mo using an 8 channel isobaric tagging tandem mass spectrometry discovery proteomics platform. Over 650 proteins were detected and relatively quantified. Proteins which showed a change during radiotherapy were selected for validation using an orthogonal antibody-based approach. Two of these proteins were verified in a separate patient cohort: values of CRP and LRG1 combined gave a highly significant indication of extended survival post one week of radiotherapy treatment.
journal_name
EBioMedicinejournal_title
EBioMedicineauthors
Walker MJ,Zhou C,Backen A,Pernemalm M,Williamson AJ,Priest LJ,Koh P,Faivre-Finn C,Blackhall FH,Dive C,Whetton ADdoi
10.1016/j.ebiom.2015.06.013subject
Has Abstractpub_date
2015-06-19 00:00:00pages
841-50issue
8issn
2352-3964pii
S2352-3964(15)30043-8journal_volume
2pub_type
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