Abstract:
BACKGROUND:The standard therapy regimen of conventional osteosarcoma includes neoadjuvant chemotherapy followed by surgical resection and postoperative chemotherapy. The percentage of necrotic tissue following induction chemotherapy is assessed by using the Huvos grading system, which classifies patients as "poor responders" (PR) and "good responders" (GR). The aim of this study was to identify molecular markers expressed differentially between good and poor responders to neoadjuvant chemotherapy in order to predict the response to chemotherapy in conventional osteosarcomas before beginning treatment. METHODS:Suppression Substractive Hybridization (SSH) was performed by using cDNA from frozen biopsy specimens. Expression of selected relevant genes identified by SSH was validated by using QRT-PCR. Immunohistochemistry (IHC) on tissue microarray (TMA) sections of 52 biopsies was performed to investigate protein expression in an independent cohort. RESULTS:ERK1 and STAT3 mRNA level were significantly different between PR and GR in an independent cohort. Phosphorylated STAT3 and ERK1 expressions by IHC on TMA were correlated with poor response to chemotherapy. CONCLUSIONS:Our results suggest that ERK1 and STAT3 expression are good predictive markers for chemotherapy response and that inhibitors might be used in combination with common chemotherapeutic drugs in conventional osteosarcomas.
journal_name
BMC Cancerjournal_title
BMC cancerauthors
Salas S,Jiguet-Jiglaire C,Campion L,Bartoli C,Frassineti F,Deville JL,Maues De Paula A,Forest F,Jézéquel P,Gentet JC,Bouvier Cdoi
10.1186/1471-2407-14-606subject
Has Abstractpub_date
2014-08-20 00:00:00pages
606issn
1471-2407pii
1471-2407-14-606journal_volume
14pub_type
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