Circulating Cell-Free DNA as Biomarker of Taxane Resistance in Metastatic Castration-Resistant Prostate Cancer

Cancers

Steven P. Balk¹  Rupal S. Bhatt¹  Mary-Ellen Taplin²  Atish D. Choudhury²  Gavin Ha²  Edward P. O’Connor²  Kaitlin M. Kelleher²  Christopher J. Sweeney²  Edoardo Francini³  Eric G. Wolfe⁴  Fang-Shu Ou⁴  Justin Rhoades⁵  Viktor A. Adalsteinsson⁵  Gregory Gydush⁵ 

[1] Beth Israel Deaconess Medical Center, Boston, MA 02215, USA;Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02215, USA;Department of Experimental and Clinical Medicine, University of Florence, 50134 Florence, Italy;Department of Quantitative Health Sciences, Mayo Clinic, Rochester, MN 55905, USA;Eli and Edythe L. Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA;

关键词: cell-free DNA;    biomarkers;    metastatic castration-resistant prostate cancer;    taxanes;   

DOI  :  10.3390/cancers13164055

来源: DOAJ

【 摘 要 】

There are no biomarkers predictive of resistance to docetaxel or cabazitaxel validated for patients with metastatic castration-resistant prostate cancer (mCRPC). We assessed the association between ABCB1 amplification and primary resistance to docetaxel or cabazitaxel for patients with mCRPC, using circulating cell-free DNA (cfDNA). Patients with ≥1 plasma sample drawn within 12 months before starting docetaxel (cohort A) or cabazitaxel (cohort B) for mCRPC were identified from the Dana–Farber Cancer Institute IRB approved database. Sparse whole genome sequencing was performed on the selected cfDNA samples and tumor fractions were estimated using the computational tool ichorCNA. We evaluated the association between ABCB1 amplification or other copy number alterations and primary resistance to docetaxel or cabazitaxel. Of the selected 176 patients, 45 samples in cohort A and 21 samples in cohort B had sufficient tumor content. No significant association was found between ABCB1 amplification and primary resistance to docetaxel (p = 0.58; odds ratio (OR) = 1.49) or cabazitaxel (p = 0.97; OR = 1.06). No significant association was found between exploratory biomarkers and primary resistance to docetaxel or cabazitaxel. In this study, ABCB1 amplification did not predict primary resistance to docetaxel or cabazitaxel for mCRPC. Future studies including ABCB1 amplification in a suite of putative biomarkers and a larger cohort may aid in drawing definitive conclusions.

【 授权许可】

Unknown