TY - JOUR
T1 - Impact of DNA damage repair defects on response to PSMA radioligand therapy in metastatic castration-resistant prostate cancer
AU - Privé, Bastiaan M.
AU - Slootbeek, Peter H.J.
AU - Laarhuis, Babette I.
AU - Naga, Samhita Pamidimarri
AU - van der Doelen, Maarten J.
AU - van Kalmthout, Ludwike W.M.
AU - de Keizer, Bart
AU - Ezziddin, Samer
AU - Kratochwil, Clemens
AU - Morgenstern, Alfred
AU - Bruchertseifer, Frank
AU - Ligtenberg, Marjolijn J.L.
AU - Witjes, J. Alfred
AU - van Oort, Inge M.
AU - Gotthardt, Martin
AU - Heskamp, Sandra
AU - Janssen, Marcel J.R.
AU - Gerritsen, Winald R.
AU - Nagarajah, James
AU - Mehra, Niven
N1 - Funding Information:
We thank all the investigators of the study, the patients and their families.
Publisher Copyright:
© 2021, The Author(s), under exclusive licence to Springer Nature Limited.
PY - 2022/3
Y1 - 2022/3
N2 - Purpose: Prostate-specific membrane antigen radioligand therapy (PSMA-RLT) is a novel treatment for castration-resistant prostate cancer (mCRPC). While the majority of patients responds to PSMA-RLT, with 10–15% having an exceptional response, approximately 30% of patients is unresponsive to PSMA-RLT. The molecular underpinning may in part explain these varying responses. This study investigated alterations in DNA damage repair (DDR) genes in tumour biopsies and their association with response to PSMA-RLT. Methods: A predefined retrospective cohort study was performed in mCRPC patients of whom the tumours had undergone next-generation sequencing of 40 DDR genes and received Lu-177-PSMA and/or Ac-225-PSMA-RLT. The primary outcome of this study was to compare the progression free survival (PFS) after PSMA-RLT for patients with and without pathogenic DDR aberrations in their tumour. Secondary outcomes were prostate-specific antigen (PSA) response and overall survival (OS). Results: A total of 40 patients were included of which seventeen had a tumour with a pathogenic DDR aberration (DDR+), of which eight had defects in BRCA1/2. DDR+ patients had an equal varying response to PSMA-RLT compared to those without pathological DDR anomalies (DDR-) in terms of PFS (5.9 vs. 6.4 months, respectively; HR 1.14; 95% CI 0.58-2.25; p = 0.71), ≥50% PSA response (59% vs. 65%, respectively; p = 0.75) or OS (11.1 vs. 10.7 months, respectively; HR 1.40; 95% CI: 0.68–2.91; p = 0.36). Conclusion: In this study of a selected cohort, pathogenic DDR aberrations were not associated with exceptional responsiveness to PSMA-RLT. Translational studies in larger prospective cohorts are warranted to associate DDR gene defects with differential responses to PSMA-RLT.
AB - Purpose: Prostate-specific membrane antigen radioligand therapy (PSMA-RLT) is a novel treatment for castration-resistant prostate cancer (mCRPC). While the majority of patients responds to PSMA-RLT, with 10–15% having an exceptional response, approximately 30% of patients is unresponsive to PSMA-RLT. The molecular underpinning may in part explain these varying responses. This study investigated alterations in DNA damage repair (DDR) genes in tumour biopsies and their association with response to PSMA-RLT. Methods: A predefined retrospective cohort study was performed in mCRPC patients of whom the tumours had undergone next-generation sequencing of 40 DDR genes and received Lu-177-PSMA and/or Ac-225-PSMA-RLT. The primary outcome of this study was to compare the progression free survival (PFS) after PSMA-RLT for patients with and without pathogenic DDR aberrations in their tumour. Secondary outcomes were prostate-specific antigen (PSA) response and overall survival (OS). Results: A total of 40 patients were included of which seventeen had a tumour with a pathogenic DDR aberration (DDR+), of which eight had defects in BRCA1/2. DDR+ patients had an equal varying response to PSMA-RLT compared to those without pathological DDR anomalies (DDR-) in terms of PFS (5.9 vs. 6.4 months, respectively; HR 1.14; 95% CI 0.58-2.25; p = 0.71), ≥50% PSA response (59% vs. 65%, respectively; p = 0.75) or OS (11.1 vs. 10.7 months, respectively; HR 1.40; 95% CI: 0.68–2.91; p = 0.36). Conclusion: In this study of a selected cohort, pathogenic DDR aberrations were not associated with exceptional responsiveness to PSMA-RLT. Translational studies in larger prospective cohorts are warranted to associate DDR gene defects with differential responses to PSMA-RLT.
UR - http://www.scopus.com/inward/record.url?scp=85110573170&partnerID=8YFLogxK
U2 - 10.1038/s41391-021-00424-2
DO - 10.1038/s41391-021-00424-2
M3 - Article
AN - SCOPUS:85110573170
SN - 1365-7852
VL - 25
SP - 71
EP - 78
JO - Prostate cancer and prostatic diseases
JF - Prostate cancer and prostatic diseases
IS - 1
ER -