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A Prospective Correlation of Tissue Histopathology With Nucleic Acid Yield in Metastatic Castration-Resistant Prostate Cancer Biopsy Specimens.
Jimenez, Rafael E; Atwell, Thomas D; Sicotte, Hughes; Eckloff, Bruce; Wang, Liguo; Barman, Poulami; Sinnwell, Jason P; Eiken, Patrick W; McMenomy, Brendan P; Tan, Winston; Wang, Liewei; Carlson, Rachel E; Kohli, Manish.
Affiliation
  • Jimenez RE; Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN.
  • Atwell TD; Department of Radiology, Mayo Clinic, Rochester, MN.
  • Sicotte H; Division of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, MN.
  • Eckloff B; Medical Genome Facility, Mayo Clinic, Rochester, MN.
  • Wang L; Division of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, MN.
  • Barman P; Division of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, MN.
  • Sinnwell JP; Division of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, MN.
  • Eiken PW; Department of Radiology, Mayo Clinic, Rochester, MN.
  • McMenomy BP; Department of Radiology, Mayo Clinic, Rochester, MN.
  • Tan W; Department of Hematology/Oncology, Mayo Clinic, Jacksonville, FL.
  • Wang L; Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, Rochester, MN.
  • Carlson RE; Division of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, MN.
  • Kohli M; Department of Medical Oncology, Mayo Clinic, Rochester, MN.
Mayo Clin Proc Innov Qual Outcomes ; 3(1): 14-22, 2019 Mar.
Article in En | MEDLINE | ID: mdl-30899904
ABSTRACT

OBJECTIVE:

To determine histopathologic, exome, and transcriptome nucleic acid material yield from prospectively collected metastatic tissue biopsy specimens in patients with metastatic castration-resistant prostate cancer (mCRPC). PATIENTS AND

METHODS:

Patients with mCRPC initiating abiraterone acetate therapy underwent 2 serial metastatic site core needle biopsies after study activation on May 17, 2013. Multiple cores were obtained, and from each core, 1- to 2-mm segments were separated and formalin fixed for histopathologic examination. Tumor purity was determined for DNA and RNA from the rest of the biopsy specimen. RNA quality was assessed by calculation of an RNA integrity number and a DV200 score.

RESULTS:

A total of 89 patients underwent 172 uniformly processed core needle biopsies (89 on visit 1 and 83 on visit 2) between May 30, 2013, and September 10, 2015. Metastatic sites biopsied included bone (131), lymph nodes (31), liver (5), lung (3), and pelvic soft tissues (2). Of the 172 biopsy specimens, 85 (49%) had at least one of the multiple cores positive for tumor on histopathologic examination (53 of 88 [60%] from visit 1 and 32 of 83 [39%] from visit 2; P=.006). Metastatic carcinoma was observed in 50 of 130 bone lesion specimens (38%), compared to 35 of 41 nonbone specimens (85%) (P<.001). More than 10% tumoral DNA purity was observed in 89% and 80% of visit 1 and visit 2 biopsy specimens, respectively. Similarly, more than 10% tumor RNA purity was observed in 79% of visit 1 vs 59% for visit 2 (P=.008). In all, 134 of 172 procedures (78%) yielded tumor material either by histopathologic or nucleic acid purity analysis.

CONCLUSION:

This study found that biopsy specimens from mCRPC sites yield adequate histopathologic, exome, and transcriptome material in most, but not all, cases. This finding has relevance for future genome sequencing studies on the introduction of targeted therapeutic agents. TRIAL REGISTRATION clinicaltrials.gov Identifier 01953640.
Key words

Full text: 1 Collection: 01-internacional Database: MEDLINE Type of study: Prognostic_studies Language: En Journal: Mayo Clin Proc Innov Qual Outcomes Year: 2019 Document type: Article

Full text: 1 Collection: 01-internacional Database: MEDLINE Type of study: Prognostic_studies Language: En Journal: Mayo Clin Proc Innov Qual Outcomes Year: 2019 Document type: Article