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- W2384467097 abstract "ABSTRACT Aim: A phase I/II study of nanoparticle albumin-bound paclitaxel (nab-paclitaxel) plus cisplatin in the treatment of advanced nasopharyngeal carcinomas (NPC) has been completed (NCT01735409). Here we reported the outcomes of biomarker analyses. Methods: The tumor tissues and baseline blood sample of all included patients were prospectively collected. The expression of secreted protein acidic and rich in cysteine (SPARC), excision repair cross-complementation group (ERCC1), b-tubulin III and Breast cancer 1 (BRCA1) were examined by immunohistochemical (IHC) staining. The single nucleotide polymorphism (SNP) of ATP-binding casette B1 (ABCB1) 2677 was detected by DNA sequencing. RECIST 1.1 was used to evaluate the response and CTC AE 4.0 was used to assess the toxicity. Results: A total of 69 patients with advanced NPC were enrolled. The overall objective response rate (ORR) was 66% (42/64) and median progression free survival (PFS) was 9 months (95% CI 6-12). Stromal-vascular SPARC over-expression indicated significantly better response (74% vs. 29%, OR = 7.1, 95% CI 1.2 to 41.1; P = 0.03) and prolonged PFS (9 vs. 3 months, P = 0.01). However, SPARC expression on the tumor cells as well as other biomarkers including b-tubulin III, ERCC1and BRCA1 failed to substantial predictive value. ABCB1 2677 homozygous genotype (GG/TT) indicated inferior tumor response (OR = 0.5, 95% CI 0.2 to 1.8; P = 0.33) and higher incidence of Grade 3/4 toxicity (OR = 1.3, 95% CI 0.4 to 4.7; P = 0.69) but without significance. The above results were confirmed by adjusting for history of chemotherapy and dose level in the multivariate analysis. Additionally, those with simultaneously low tumoral b-tubulin III, ERCC1and BRCA1expression and ABCB1 2677 heterozygotes represented significantly greater tumor response rate (100% vs. 64%, P = 0.04) and longer PFS (P = 0.03). Conclusions: SPARC expression in the stromal-vascular, rather than that on the tumor cells, predicts the sensitivity of patients to nab-paclitaxel plus cisplatin. Other markers (b-tubulin III, ERCC1, BRCA1) failed to show significant predictive value. ABCB1 2677 loci SNP were not associated with efficacy and toxiciy. In addition, we showed some evidences that combination of biomarkers may improve the predictive accuracy. Disclosure: All authors have declared that this study is sponsored by Celgene company." @default.
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- W2384467097 date "2014-09-01" @default.
- W2384467097 modified "2023-09-28" @default.
- W2384467097 title "Biomarker Analyses of a Phase I/II Study of Nanoparticle Albumin-Bound Paclitaxel Plus Cisplatin in the Treatment of Advanced Nasopharyngeal Carcinomas" @default.
- W2384467097 doi "https://doi.org/10.1093/annonc/mdu326.41" @default.
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