Genome-wide plasma DNA methylation features of metastatic prostate cancer.

Genome-wide plasma DNA methylation features of metastatic prostate cancer. J Clin Invest. 2020 Mar 09;: Authors: Wu A, Cremaschi P, Wetterskog D, Conteduca V, Franceschini GM, Kleftogiannis D, Jayaram A, Sandhu S, Wong SQ, Benelli M, Salvi S, Gurioli G, Feber A, Pereira MB, Wingate AM, Gonzalez-Billalebeita E, De Giorgi U, Demichelis F, Lise S, Attard G Abstract Tumor DNA circulates in the plasma of cancer patients admixed with DNA from noncancerous cells. The genomic landscape of plasma DNA has been characterized in metastatic castration-resistant prostate cancer (mCRPC) but the plasma methylome has not been extensively explored. Here, we performed next-generation sequencing (NGS) on plasma DNA with and without bisulfite treatment from mCRPC patients receiving either abiraterone or enzalutamide in the pre- or post-chemotherapy setting. Principal component analysis on the mCRPC plasma methylome indicated that the main contributor to methylation variance (principal component one, or PC1) was strongly correlated with genomically determined tumor fraction (r = -0.96; P < 10-8) and characterized by hypermethylation of targets of the polycomb repressor complex 2 components. Further deconvolution of the PC1 top-correlated segments revealed that these segments are comprised of methylation patterns specific to either prostate cancer or prostate normal epithelium. To extract information specific to an individual's cancer, we then focused o...
Source: Clinical Prostate Cancer - Category: Cancer & Oncology Authors: Tags: J Clin Invest Source Type: research