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Onal C, Elmali A, Guler OC. In Regard to Ong et al. Int J Radiat Oncol Biol Phys 2024; 119:1021-1022. [PMID: 38851255 DOI: 10.1016/j.ijrobp.2024.02.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Accepted: 02/18/2024] [Indexed: 06/10/2024]
Affiliation(s)
- Cem Onal
- Department of Radiation Oncology, Adana Dr Turgut Noyan Research and Treatment Center, Başkent University Faculty of Medicine, Adana, Turkey; Department of Radiation Oncology, Başkent University Faculty of Medicine, Ankara, Turkey
| | - Aysenur Elmali
- Department of Radiation Oncology, Başkent University Faculty of Medicine, Ankara, Turkey
| | - Ozan Cem Guler
- Department of Radiation Oncology, Adana Dr Turgut Noyan Research and Treatment Center, Başkent University Faculty of Medicine, Adana, Turkey
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Roumeliotis M, Thind K, Morrison H, Burke B, Martell K, van Dyke L, Barbera L, Quirk S. The impact of advancing the standard of care in radiotherapy on operational treatment resources. J Appl Clin Med Phys 2024; 25:e14363. [PMID: 38634814 PMCID: PMC11244663 DOI: 10.1002/acm2.14363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 02/05/2024] [Accepted: 03/22/2024] [Indexed: 04/19/2024] Open
Abstract
PURPOSE To demonstrate the impact of implementing hypofractionated prescription regimens and advanced treatment techniques on institutional operational hours and radiotherapy personnel resources in a multi-institutional setting. The study may be used to describe the impact of advancing the standard of care with modern radiotherapy techniques on patient and staff resources. METHODS This study uses radiation therapy data extracted from the radiotherapy information system from two tertiary care, university-affiliated cancer centers from 2012 to 2021. Across all patients in the analysis, the average fraction number for curative and palliative patients was reported each year in the decade. Also, the institutional operational treatment hours are reported for both centers. A sub-analysis for curative intent breast and lung radiotherapy patients was performed to contextualize the impact of changes to imaging, motion management, and treatment technique. RESULTS From 2012 to 2021, Center 1 had 42 214 patient plans and Center 2 had 43 252 patient plans included in the analysis. Averaged over both centers across the decade, the average fraction number per patient decreased from 6.9 to 5.2 (25%) and 21.8 to 17.2 (21%) for palliative and curative patients, respectively. The operational treatment hours for both institutions increased from 8 h 15 min to 9 h 45 min (18%), despite a patient population increase of 45%. CONCLUSION The clinical implementation of hypofractionated treatment regimens has successfully reduced the radiotherapy workload and operational treatment hours required to treat patients. This analysis describes the impact of changes to the standard of care on institutional resources.
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Affiliation(s)
- Michael Roumeliotis
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, Baltimore, Maryland, USA
| | - Kundan Thind
- Henry Ford Cancer Institute, Detroit, Michigan, USA
| | - Hali Morrison
- Department of Oncology, University of Calgary, Calgary, Alberta, Canada
| | - Ben Burke
- University of Alberta, Edmonton, Alberta, Canada
| | - Kevin Martell
- Department of Oncology, University of Calgary, Calgary, Alberta, Canada
- Tom Baker Cancer Centre, Calgary, Alberta, Canada
| | | | - Lisa Barbera
- Department of Oncology, University of Calgary, Calgary, Alberta, Canada
- Tom Baker Cancer Centre, Calgary, Alberta, Canada
| | - Sarah Quirk
- Department of Radiation Oncology, Brigham and Women's Hospital, Dana-Farber Cancer Institute, and Harvard Medical School, Boston, Massachusetts, USA
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3
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Ong WL, Zhang L, Loblaw A. In Reply to Onal et al. Int J Radiat Oncol Biol Phys 2024; 119:1022-1023. [PMID: 38851256 DOI: 10.1016/j.ijrobp.2024.02.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Accepted: 02/07/2024] [Indexed: 06/10/2024]
Affiliation(s)
- Wee Loon Ong
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada; Department of Radiation Oncology, University of Toronto, Toronto, Ontario, Canada; Alfred Health Radiation Oncology, Monash University, Melbourne, Australia
| | - Liying Zhang
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
| | - Andrew Loblaw
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada; Department of Radiation Oncology, University of Toronto, Toronto, Ontario, Canada; Department of Health Policy, Measurement and Evaluation, University of Toronto, Toronto, Ontario, Canada
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Hudson JM, Loblaw A, McGuffin M, Chung HT, Tseng CL, Helou J, Cheung P, Szumacher E, Liu S, Zhang L, Deabreu A, Mamedov A, Morton G. Prostate high dose-rate brachytherapy as monotherapy for low and intermediate-risk prostate cancer: Efficacy results from a randomized phase II clinical trial of one fraction of 19 Gy or two fractions of 13.5 Gy: A 9-year update. Radiother Oncol 2024; 198:110381. [PMID: 38879130 DOI: 10.1016/j.radonc.2024.110381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2024] [Revised: 06/05/2024] [Accepted: 06/08/2024] [Indexed: 06/25/2024]
Abstract
BACKGROUND AND PURPOSE High dose-rate (HDR) brachytherapy as a monotherapy is an accepted treatment for localized prostate cancer, but the optimal dose and fractionation schedule remain unknown. We report on the efficacy of a randomized Phase II trial comparing HDR monotherapy delivered as 27 Gy in 2 fractions vs. 19 Gy in 1 fraction with a median follow-up of 9 years. MATERIALS AND METHODS Enrolled patients had low or intermediate-risk disease, <60 cc prostate volume and no androgen deprivation use. Patients were randomized to 27 Gy in 2 fractions delivered one week apart vs a single fraction of 19 Gy. RESULTS 170 patients were randomized: median age 65 years, median follow-up 107 months and median baseline PSA 6.35 ng/ml. NCCN risk categories comprised low (19 %), favourable (51 %), and unfavourable intermediate risk (30 %). The median PSA at 8 years was 0.08 ng/ml in the 2-fraction arm vs. 0.89 ng/ml in the single-fraction arm. The cumulative incidence of local failure at 8 years was 11.2 % in the 2-fraction arm vs. 35.9 % in the single-fraction arm (p < 0.001). The incidence of distant failure at 8 years was 3.8 % in the 2-fraction arm and 2.5 % in the single-fraction arm (p = 0.6). CONCLUSIONS HDR monotherapy delivered in two fractions of 13.5 Gy demonstrated a persistent cancer control rate at 8 years and was well-tolerated. Single-fraction monotherapy yielded poor oncologic control and is not recommended. These findings contribute to the ongoing discourse on optimal HDR monotherapy strategies for low and intermediate-risk prostate cancer.
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Affiliation(s)
- John M Hudson
- Sunnybrook Odette Cancer Centre, University of Toronto, Canada
| | - Andrew Loblaw
- Sunnybrook Odette Cancer Centre, University of Toronto, Canada
| | | | - Hans T Chung
- Sunnybrook Odette Cancer Centre, University of Toronto, Canada
| | - Chia-Lin Tseng
- Sunnybrook Odette Cancer Centre, University of Toronto, Canada
| | - Joelle Helou
- Sunnybrook Odette Cancer Centre, University of Toronto, Canada
| | - Patrick Cheung
- Sunnybrook Odette Cancer Centre, University of Toronto, Canada
| | - Ewa Szumacher
- Sunnybrook Odette Cancer Centre, University of Toronto, Canada
| | - Stanley Liu
- Sunnybrook Odette Cancer Centre, University of Toronto, Canada
| | - Liying Zhang
- Sunnybrook Odette Cancer Centre, University of Toronto, Canada
| | - Andrea Deabreu
- Sunnybrook Odette Cancer Centre, University of Toronto, Canada
| | | | - Gerard Morton
- Sunnybrook Odette Cancer Centre, University of Toronto, Canada.
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Corrao G, Marvaso G, Mastroleo F, Biffi A, Pellegrini G, Minari S, Vincini MG, Zaffaroni M, Zerini D, Volpe S, Gaito S, Mazzola GC, Bergamaschi L, Cattani F, Petralia G, Musi G, Ceci F, De Cobelli O, Orecchia R, Alterio D, Jereczek-Fossa BA. Photon vs proton hypofractionation in prostate cancer: A systematic review and meta-analysis. Radiother Oncol 2024; 195:110264. [PMID: 38561122 DOI: 10.1016/j.radonc.2024.110264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 03/21/2024] [Accepted: 03/24/2024] [Indexed: 04/04/2024]
Abstract
BACKGROUND High-level evidence on hypofractionated proton therapy (PT) for localized and locally advanced prostate cancer (PCa) patients is currently missing. The aim of this study is to provide a systematic literature review to compare the toxicity and effectiveness of curative radiotherapy with photon therapy (XRT) or PT in PCa. METHODS PubMed, Embase, and the Cochrane Library databases were systematically searched up to April 2022. Men with a diagnosis of PCa who underwent curative hypofractionated RT treatment (PT or XRT) were included. Risk of grade (G) ≥ 2 acute and late genitourinary (GU) OR gastrointestinal (GI) toxicity were the primary outcomes of interest. Secondary outcomes were five-year biochemical relapse-free survival (b-RFS), clinical relapse-free, distant metastasis-free, and prostate cancer-specific survival. Heterogeneity between study-specific estimates was assessed using Chi-square statistics and measured with the I2 index (heterogeneity measure across studies). RESULTS A total of 230 studies matched inclusion criteria and, due to overlapped populations, 160 were included in the present analysis. Significant lower rates of G ≥ 2 acute GI incidence (2 % vs 7 %) and improved 5-year biochemical relapse-free survival (95 % vs 91 %) were observed in the PT arm compared to XRT. PT benefits in 5-year biochemical relapse-free survival were maintained for the moderate hypofractionated arm (p-value 0.0122) and among patients in intermediate and low-risk classes (p-values < 0.0001 and 0.0368, respectively). No statistically relevant differences were found for the other considered outcomes. CONCLUSION The present study supports that PT is safe and effective for localized PCa treatment, however, more data from RCTs are needed to draw solid evidence in this setting and further effort must be made to identify the patient subgroups that could benefit the most from PT.
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Affiliation(s)
- Giulia Corrao
- Division of Radiation Oncology, European Institute of Oncology IRCCS, Milan, Italy; Department of Oncology and Hemato-oncology, University of Milan, Milan, Italy
| | - Giulia Marvaso
- Division of Radiation Oncology, European Institute of Oncology IRCCS, Milan, Italy; Department of Oncology and Hemato-oncology, University of Milan, Milan, Italy
| | - Federico Mastroleo
- Division of Radiation Oncology, European Institute of Oncology IRCCS, Milan, Italy; Department of Oncology and Hemato-oncology, University of Milan, Milan, Italy
| | - Annalisa Biffi
- National Centre of Healthcare Research and Pharmacoepidemiology, University of Milano-Bicocca, Milan, Italy; Unit of Biostatistics, Epidemiology and Public Health, Department of Statistics and Quantitative Methods, University of Milano-Bicocca, Milan, Italy
| | - Giacomo Pellegrini
- National Centre of Healthcare Research and Pharmacoepidemiology, University of Milano-Bicocca, Milan, Italy; Unit of Biostatistics, Epidemiology and Public Health, Department of Statistics and Quantitative Methods, University of Milano-Bicocca, Milan, Italy
| | - Samuele Minari
- National Centre of Healthcare Research and Pharmacoepidemiology, University of Milano-Bicocca, Milan, Italy
| | - Maria Giulia Vincini
- Division of Radiation Oncology, European Institute of Oncology IRCCS, Milan, Italy.
| | - Mattia Zaffaroni
- Division of Radiation Oncology, European Institute of Oncology IRCCS, Milan, Italy.
| | - Dario Zerini
- Division of Radiation Oncology, European Institute of Oncology IRCCS, Milan, Italy
| | - Stefania Volpe
- Division of Radiation Oncology, European Institute of Oncology IRCCS, Milan, Italy; Department of Oncology and Hemato-oncology, University of Milan, Milan, Italy
| | - Simona Gaito
- Proton Clinical Outcomes Unit, The Christie NHS Proton Beam Therapy Centre, Manchester, UK; Division of Clinical Cancer Science, School of Medical Sciences, The University of Manchester, Manchester, UK
| | | | - Luca Bergamaschi
- Division of Radiation Oncology, European Institute of Oncology IRCCS, Milan, Italy
| | - Federica Cattani
- Unit of Medical Physics, European Institute of Oncology IRCCS, Milan, Italy
| | - Giuseppe Petralia
- Department of Oncology and Hemato-oncology, University of Milan, Milan, Italy; Division of Radiology, IEO European Institute of Oncology IRCCS, Milan, Italy
| | - Gennaro Musi
- Division of Urology, European Institute of Oncology IRCCS, Milan, Italy
| | - Francesco Ceci
- Department of Oncology and Hemato-oncology, University of Milan, Milan, Italy; Division of Nuclear Medicine and Theranostics, IEO European Institute of Oncology, IRCCS, Milan, Italy
| | - Ottavio De Cobelli
- Department of Oncology and Hemato-oncology, University of Milan, Milan, Italy; Division of Urology, European Institute of Oncology IRCCS, Milan, Italy
| | - Roberto Orecchia
- Scientific Directorate, European Institute of Oncology IRCCS, Milan, Italy
| | - Daniela Alterio
- Division of Radiation Oncology, European Institute of Oncology IRCCS, Milan, Italy
| | - Barbara Alicja Jereczek-Fossa
- Division of Radiation Oncology, European Institute of Oncology IRCCS, Milan, Italy; Department of Oncology and Hemato-oncology, University of Milan, Milan, Italy
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Fredman E, Icht O, Moore A, Bragilovski D, Kindler J, Golan S, Limon D. SABR-Dual: a phase II/III trial of two-fraction versus five-fraction stereotactic radiotherapy for localized low- and favorable intermediate-risk prostate cancer. BMC Cancer 2024; 24:431. [PMID: 38589860 PMCID: PMC11000374 DOI: 10.1186/s12885-024-12165-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 03/21/2024] [Indexed: 04/10/2024] Open
Abstract
BACKGROUND Dose-escalated radiotherapy is known to improve progression free survival in patients with localized prostate cancer, and recent advances have led to the standardization of ultrahypofractionated stereotactic ablative radiotherapy (SABR) delivered in just 5-fractions. Based on the known effectiveness of the accepted though invasive 2-fraction treatment method of high-dose-rate brachytherapy and given the ubiquity of prostate cancer, a further reduction in the number of treatments of external-beam SABR is possible. This study aims to evaluate the safety, efficacy, and non-inferiority of generalizable 2-fraction SABR compared to the current 5-fraction regimen. METHODS 502 patients will be enrolled on this phase II/III randomized control trial. Eligible patients will have previously untreated low- or favorable intermediate-risk adenocarcinoma of the prostate. Patients will be randomized between standard SABR of 40 Gy in 5 fractions given every-other-day and 27 Gy in 2 fractions at least two days apart but completing within seven days. MRI-based planning, radiopaque hydrogel spacer insertion, and fiducial marker placement are required, and SABR will be delivered on either a standard CT-guided linear accelerator or MR-LINAC. The primary endpoint will be freedom from disease progression, with additional secondary clinical, toxicity, and quality of life endpoints. DISCUSSION This study will be the largest prospective randomized trial, adequately powered to demonstrate non-inferiority, comparing 2-fraction SABR to standard 5-fraction SABR for localized prostate cancer. As the protocol does not obligate use of an MRI-LINAC or other adaptive technologies, results will be broadly generalizable to the wider community. TRIAL REGISTRATION This trial is registered on Clinicaltrials.gov: ClinicalTrials.gov Identifier: NCT06027892.
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Affiliation(s)
- Elisha Fredman
- Department of Radiation Oncology, Davidoff Cancer Center, Rabin Medical Center, 39 Ze'ev Jabotinsky St, Petah Tikvah, Israel.
| | - Oded Icht
- Department of Radiation Oncology, Davidoff Cancer Center, Rabin Medical Center, 39 Ze'ev Jabotinsky St, Petah Tikvah, Israel
| | - Assaf Moore
- Department of Radiation Oncology, Davidoff Cancer Center, Rabin Medical Center, 39 Ze'ev Jabotinsky St, Petah Tikvah, Israel
| | - Dimitri Bragilovski
- Department of Radiation Oncology, Davidoff Cancer Center, Rabin Medical Center, 39 Ze'ev Jabotinsky St, Petah Tikvah, Israel
| | - Jonathan Kindler
- Department of Radiation Oncology, Davidoff Cancer Center, Rabin Medical Center, 39 Ze'ev Jabotinsky St, Petah Tikvah, Israel
| | - Shay Golan
- Department of Urology, Rabin Medical Center, 39 Ze'ev Jabotinsky St, Petah Tikvah, Israel
| | - Dror Limon
- Department of Radiation Oncology, Davidoff Cancer Center, Rabin Medical Center, 39 Ze'ev Jabotinsky St, Petah Tikvah, Israel
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Westley RL, Biscombe K, Dunlop A, Mitchell A, Oelfke U, Nill S, Murray J, Pathmanathan A, Hafeez S, Parker C, Ratnakumaran R, Alexander S, Herbert T, Hall E, Tree AC. Interim Toxicity Analysis From the Randomized HERMES Trial of 2- and 5-Fraction Magnetic Resonance Imaging-Guided Adaptive Prostate Radiation Therapy. Int J Radiat Oncol Biol Phys 2024; 118:682-687. [PMID: 37776979 DOI: 10.1016/j.ijrobp.2023.09.032] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 08/31/2023] [Accepted: 09/18/2023] [Indexed: 10/02/2023]
Abstract
PURPOSE Ultrahypofractionated radiation therapy (UHRT) is an effective treatment for localized prostate cancer with an acceptable toxicity profile; boosting the visible intraprostatic tumor has been shown to improve biochemical disease-free survival with no significant effect on genitourinary (GU) and gastrointestinal (GI) toxicity. METHODS AND MATERIALS HERMES is a single-center noncomparative randomized phase 2 trial in men with intermediate or lower high risk prostate cancer. Patients were allocated (1:1) to 36.25 Gy in 5 fractions over 2 weeks or 24 Gy in 2 fractions over 8 days with an integrated boost to the magnetic resonance imaging (MRI) visible tumor of 27 Gy in 2 fractions. A minimization algorithm with a random element with risk group as a balancing factor was used for participant randomization. Treatment was delivered on the Unity MR-Linac (Elekta AB) with daily online adaption. The primary endpoint was acute GU Common Terminology Criteria for Adverse Events version 5.0 toxicity with the aim of excluding a doubling of the rate of acute grade 2+ GU toxicity seen in PACE. Analysis was by treatment received and included all participants who received at least 1 fraction of study treatment. This interim analysis was prespecified (stage 1 of a 2-stage Simon design) for when 10 participants in each treatment group had completed the acute toxicity monitoring period (12 weeks after radiation therapy). RESULTS Acute grade 2 GU toxicity was reported in 1 (10%) patient in the 5-fraction group and 2 (20%) patients in the 2-fraction group. No grade 3+ GU toxicities were reported. CONCLUSIONS At this interim analysis, the rate of GU toxicity in the 2-fraction and 5-fraction treatment groups was found to be below the prespecified threshold (5/10 grade 2+) and continuation of the study to complete recruitment of 23 participants per group was recommended.
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Affiliation(s)
- Rosalyne Laura Westley
- Royal Marsden NHS Foundation Trust, London, United Kingdom; Institute of Cancer Research, London, United Kingdom.
| | | | - Alex Dunlop
- Joint Department of Physics, Institute of Cancer Research and Royal Marsden NHS Foundation Trust, London, United Kingdom
| | - Adam Mitchell
- Joint Department of Physics, Institute of Cancer Research and Royal Marsden NHS Foundation Trust, London, United Kingdom
| | - Uwe Oelfke
- Joint Department of Physics, Institute of Cancer Research and Royal Marsden NHS Foundation Trust, London, United Kingdom
| | - Simeon Nill
- Joint Department of Physics, Institute of Cancer Research and Royal Marsden NHS Foundation Trust, London, United Kingdom
| | - Julia Murray
- Royal Marsden NHS Foundation Trust, London, United Kingdom; Institute of Cancer Research, London, United Kingdom
| | - Angela Pathmanathan
- Royal Marsden NHS Foundation Trust, London, United Kingdom; Institute of Cancer Research, London, United Kingdom
| | - Shaista Hafeez
- Royal Marsden NHS Foundation Trust, London, United Kingdom; Institute of Cancer Research, London, United Kingdom
| | - Chris Parker
- Royal Marsden NHS Foundation Trust, London, United Kingdom; Institute of Cancer Research, London, United Kingdom
| | - Ragu Ratnakumaran
- Royal Marsden NHS Foundation Trust, London, United Kingdom; Institute of Cancer Research, London, United Kingdom
| | - Sophie Alexander
- Royal Marsden NHS Foundation Trust, London, United Kingdom; Institute of Cancer Research, London, United Kingdom
| | - Trina Herbert
- Royal Marsden NHS Foundation Trust, London, United Kingdom
| | - Emma Hall
- Institute of Cancer Research, London, United Kingdom
| | - Alison C Tree
- Royal Marsden NHS Foundation Trust, London, United Kingdom; Institute of Cancer Research, London, United Kingdom
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Snyder J, Smith B, Aubin JS, Shepard A, Hyer D. Simulating an intra-fraction adaptive workflow to enable PTV margin reduction in MRIgART volumetric modulated arc therapy for prostate SBRT. Front Oncol 2024; 13:1325105. [PMID: 38260830 PMCID: PMC10800949 DOI: 10.3389/fonc.2023.1325105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Accepted: 12/18/2023] [Indexed: 01/24/2024] Open
Abstract
Purpose This study simulates a novel prostate SBRT intra-fraction re-optimization workflow in MRIgART to account for prostate intra-fraction motion and evaluates the dosimetric benefit of reducing PTV margins. Materials and methods VMAT prostate SBRT treatment plans were created for 10 patients using two different PTV margins, one with a 5 mm margin except 3 mm posteriorly (standard) and another using uniform 2 mm margins (reduced). All plans were prescribed to 36.25 Gy in 5 fractions and adapted onto each daily MRI dataset. An intra-fraction adaptive workflow was simulated for the reduced margin group by synchronizing the radiation delivery with target position from cine MRI imaging. Intra-fraction delivered dose was reconstructed and prostate DVH metrics were evaluated under three conditions for the reduced margin plans: Without motion compensation (no-adapt), with a single adapt prior to treatment (ATP), and lastly for intra-fraction re-optimization during delivery (intra). Bladder and rectum DVH metrics were compared between the standard and reduced margin plans. Results As expected, rectum V18 Gy was reduced by 4.4 ± 3.9%, D1cc was reduced by 12.2 ± 6.8% (3.4 ± 2.3 Gy), while bladder reductions were 7.8 ± 5.6% for V18 Gy, and 9.6 ± 7.3% (3.4 ± 2.5 Gy) for D1cc for the reduced margin reference plans compared to the standard PTV margin. For the intrafraction replanning approach, average intra-fraction optimization times were 40.0 ± 2.9 seconds, less than the time to deliver one of the four VMAT arcs (104.4 ± 9.3 seconds) used for treatment delivery. When accounting for intra-fraction motion, prostate V36.25 Gy was on average 96.5 ± 4.0%, 99.1 ± 1.3%, and 99.6 ± 0.4 for the non-adapt, ATP, and intra-adapt groups, respectively. The minimum dose received by the prostate was less than 95% of the prescription dose in 84%, 36%, and 10% of fractions, for the non-adapt, ATP, and intra-adapt groups, respectively. Conclusions Intra-fraction re-optimization improves prostate coverage, specifically the minimum dose to the prostate, and enables PTV margin reduction and subsequent OAR sparing. Fast re-optimizations enable uninterrupted treatment delivery.
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Affiliation(s)
- Jeffrey Snyder
- Department of Radiation Oncology, University of Iowa Hospitals and Clinics, Iowa City, IA, United States
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9
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Courtney PT, Valle LF, Raldow AC, Steinberg ML. MRI-Guided Radiation Therapy-An Emerging and Disruptive Process of Care: Healthcare Economic and Policy Considerations. Semin Radiat Oncol 2024; 34:4-13. [PMID: 38105092 DOI: 10.1016/j.semradonc.2023.10.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2023]
Abstract
MRI-guided radiation therapy (MRgRT) is an emerging, innovative technology that provides opportunities to transform and improve the current clinical care process in radiation oncology. As with many new technologies in radiation oncology, careful evaluation from a healthcare economic and policy perspective is required for its successful implementation. In this review article, we describe the current evidence surrounding MRgRT, framing it within the context of value within the healthcare system. Additionally, we highlight areas in which MRgRT may disrupt the current process of care, and discuss the evidence thresholds and timeline required for the widespread adoption of this promising technology.
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Affiliation(s)
- P Travis Courtney
- Department of Radiation Oncology, University of California, Los Angeles, CA
| | - Luca F Valle
- Department of Radiation Oncology, University of California, Los Angeles, CA
| | - Ann C Raldow
- Department of Radiation Oncology, University of California, Los Angeles, CA
| | - Michael L Steinberg
- Department of Radiation Oncology, University of California, Los Angeles, CA.
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10
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Ong WL, Zhang L, Loblaw A. Response to comment to "Dosimetric correlates of toxicities and quality of life following two-fraction stereotactic ablative radiotherapy (SABR) for prostate cancer". Radiother Oncol 2023; 189:109918. [PMID: 37776903 DOI: 10.1016/j.radonc.2023.109918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Accepted: 09/14/2023] [Indexed: 10/02/2023]
Affiliation(s)
- Wee Loon Ong
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Canada; Department of Radiation Oncology, University of Toronto, Canada; Alfred Health Radiation Oncology, Monash University, Melbourne, Australia
| | - Liying Zhang
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Canada
| | - Andrew Loblaw
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Canada; Department of Radiation Oncology, University of Toronto, Canada; Department of Health Policy, Measurement and Evaluation, University of Toronto, Canada.
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11
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Ong WL, Loblaw A. The march toward single-fraction stereotactic body radiotherapy for localized prostate cancer-Quo Vadimus? World J Urol 2023; 41:3485-3491. [PMID: 37921936 DOI: 10.1007/s00345-023-04663-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Accepted: 10/01/2023] [Indexed: 11/05/2023] Open
Abstract
PURPOSE Stereotactic body radiotherapy (SBRT) is an emerging treatment option for localized prostate cancer. There is increasing interest to reduce the number of fractions for prostate SBRT. METHODS We provide a narrative review and summary of prospective trials of different fractionation schedules for prostate SBRT, focusing on efficacy, toxicities, and quality of life outcomes. RESULTS There are two randomized phase 3 trials comparing standard external beam radiotherapy with ultra-hypofractionated radiotherapy. HYPO-RT-PC compared 78 Gy in 39 fractions vs 42.7 Gy in 7 fractions (3D-CRT or IMRT) showing non-inferiority in 5-year biochemical recurrence-free survival and equivalent tolerability. PACE-B trial compared 78 Gy in 39-fraction or 62 Gy in 20-fraction vs 36.25 Gy in 5-fraction prostate SBRT, with no significant differences in toxicity outcomes at 2 years. Five-year efficacy data for PACE-B are expected in 2024. Five-fraction prostate SBRT is currently the most common and well-established fractionation schedule with multiple prospective phase 2 trials published to date. There is more limited data on 1-4 fraction prostate SBRT. All fractionation schedules had acceptable toxicity outcomes. Experience from a high-dose-rate brachytherapy randomized trial showed inferior efficacy with single-fraction compared to two-fraction brachytherapy. Hence, caution should be applied in adopting single-fraction prostate SBRT. CONCLUSION Two-fraction SBRT is likely the shortest fractionation schedule that maintains the therapeutic ratio. Several randomized trials currently recruiting will likely provide us with more definite answers about whether two-fraction prostate SBRT should become a standard-of-care option. Enrollment of eligible patients into these trials should be encouraged.
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Affiliation(s)
- Wee Loon Ong
- Department of Radiation Oncology, Sunnybrook Health Sciences Centre, Odette Cancer Centre, University of Toronto, Rm T2-161, 2075 Bayview Ave, Toronto, ON, M4N 3M5, Canada
- Alfred Health Radiation Oncology, Monash University, Melbourne, Australia
| | - Andrew Loblaw
- Department of Radiation Oncology, Sunnybrook Health Sciences Centre, Odette Cancer Centre, University of Toronto, Rm T2-161, 2075 Bayview Ave, Toronto, ON, M4N 3M5, Canada.
- Institute of Health Policy, Measurement and Evaluation, University of Toronto, Toronto, Canada.
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Chien YT, Kao YS. Comment to "Dosimetric correlates of toxicities and quality of life following two-fraction stereotactic ablative radiotherapy (SABR) for prostate cancer". Radiother Oncol 2023; 189:109919. [PMID: 37776904 DOI: 10.1016/j.radonc.2023.109919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Accepted: 09/17/2023] [Indexed: 10/02/2023]
Affiliation(s)
- Yu-Tzu Chien
- Taoyuan General Hospital, Ministry of Health and Welfare, Taoyuan, Taiwan
| | - Yung-Shuo Kao
- Department of Radiation Oncology, Taoyuan General Hospital, Ministry of Health and Welfare, Taoyuan, Taiwan; Department of Research and Development, Taoyuan General Hospital, Ministry of Health and Welfare, Taoyuan, Taiwan.
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13
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Ong WL, Davidson M, Cheung P, Chung H, Chu W, Detsky J, Liu S, Morton G, Szumacher E, Tseng CL, Vesprini D, Ravi A, McGuffin M, Zhang L, Mamedov A, Deabreu A, Kulasingham-Poon M, Loblaw A. Dosimetric correlates of toxicities and quality of life following two-fraction stereotactic ablative radiotherapy (SABR) for prostate cancer. Radiother Oncol 2023; 188:109864. [PMID: 37619656 DOI: 10.1016/j.radonc.2023.109864] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 08/15/2023] [Accepted: 08/17/2023] [Indexed: 08/26/2023]
Abstract
PURPOSE There is no evidence-based data to guide dose constraints in two-fraction prostate stereotactic ablative radiotherapy (SABR). Using individual patient-data from two prospective trials, we aimed to correlate dosimetric parameters with toxicities and quality of life (QoL) outcomes. MATERIALS AND METHODS We included 60 patients who had two-fraction prostate SABR in the 2STAR (NCT02031328) and 2SMART (NCT03588819) trials. The prescribed dose was 26 Gy to the prostate+/-32 Gy boost to the dominant intraprostatic lesions. Toxicities and QoL data were prospectively collected using CTCAEv4 and EPIC-26 questionnaire. The outcomes evaluated were acute and late grade ≥ 2 toxicities, and late minimal clinical important changes (MCIC) in QoL domains. Dosimetric parameters for bladder, urethra, rectum, and penile bulb were evaluated. RESULTS The median follow-up was 56 months (range: 39-78 months). The cumulative incidence of grade ≥ 2 genitourinary (GU), gastrointestinal (GI), and sexual toxicities were 62%, 3%, and 17% respectively in the acute setting (<3 months), and 57%, 15%, and 52% respectively in late setting (>6 months). There were 36%, 28%, and 29% patients who had late MCIC in urinary, bowel and sexual QoL outcomes respectively. Bladder 0.5 cc was significant predictor for late grade ≥ 2 GU toxicities, with optimal cut-off of 25.5 Gy. Penile bulb D5cc was associated of late grade ≥ 2 sexual toxicities (no optimal cut-off was identified). No dosimetric parameters were identified to be associated with other outcomes. CONCLUSION Using real-life patient data from prospective trials with medium-term follow-up, we identified additional dose constraints that may mitigate the risk of late treatment-related toxicities for two-fraction prostate SABR.
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Affiliation(s)
- Wee Loon Ong
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Canada; Department of Radiation Oncology, University of Toronto, Canada; Alfred Health Radiation Oncology, Monash University, Melbourne, Australia
| | - Melanie Davidson
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Canada; Department of Radiation Oncology, University of Toronto, Canada
| | - Patrick Cheung
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Canada; Department of Radiation Oncology, University of Toronto, Canada
| | - Hans Chung
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Canada; Department of Radiation Oncology, University of Toronto, Canada
| | - William Chu
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Canada; Department of Radiation Oncology, University of Toronto, Canada
| | - Jay Detsky
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Canada; Department of Radiation Oncology, University of Toronto, Canada
| | - Stanley Liu
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Canada; Department of Radiation Oncology, University of Toronto, Canada
| | - Gerard Morton
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Canada; Department of Radiation Oncology, University of Toronto, Canada
| | - Ewa Szumacher
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Canada; Department of Radiation Oncology, University of Toronto, Canada
| | - Chia-Lin Tseng
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Canada; Department of Radiation Oncology, University of Toronto, Canada
| | - Danny Vesprini
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Canada; Department of Radiation Oncology, University of Toronto, Canada
| | - Ananth Ravi
- Department of Radiation Oncology, University of Toronto, Canada; Molli Surgical, Toronto, Canada
| | - Merrylee McGuffin
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Canada
| | - Liying Zhang
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Canada
| | - Alexandre Mamedov
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Canada
| | - Andrea Deabreu
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Canada
| | | | - Andrew Loblaw
- Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Canada; Department of Radiation Oncology, University of Toronto, Canada; Department of Health Policy, Measurement and Evaluation, University of Toronto, Canada.
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14
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Wolfe S, Diven MA, Marciscano AE, Zhou XK, Kishan AU, Steinberg ML, Miccio JA, Camilleri P, Nagar H. A randomized phase II trial of MR-guided prostate stereotactic body radiotherapy administered in 5 or 2 fractions for localized prostate cancer (FORT). BMC Cancer 2023; 23:923. [PMID: 37777738 PMCID: PMC10544147 DOI: 10.1186/s12885-023-11430-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Accepted: 09/21/2023] [Indexed: 10/02/2023] Open
Abstract
BACKGROUND Ultra-hypofractionated regimens for definitive prostate cancer (PCa) radiotherapy are increasingly utilized due in part to promising safety and efficacy data complemented by greater patient convenience from a treatment course requiring fewer sessions. As such, stereotactic body radiation therapy (SBRT) is rapidly emerging as a standard definitive treatment option for patients with localized PCa. The commercially available magnetic resonance linear accelerator (MR-LINAC) integrates MR imaging with radiation delivery, providing several theoretical advantages compared to computed tomography (CT)-guided radiotherapy. MR-LINAC technology facilitates improved visualization of the prostate, real-time intrafraction tracking of prostate and organs-at-risk (OAR), and online adaptive planning to account for target movement and anatomical changes. These features enable reduced treatment volume margins and improved sparing of surrounding OAR. The theoretical advantages of MR-guided radiotherapy (MRgRT) have recently been shown to significantly reduce rates of acute grade ≥ 2 GU toxicities as reported in the prospective randomized phase III MIRAGE trial, which compared MR-LINAC vs CT-based 5 fraction SBRT in patients with localized PCa (Kishan et al. JAMA Oncol 9:365-373, 2023). Thus, MR-LINAC SBRT-utilizing potentially fewer treatments-is warranted and clinically relevant for men with low or intermediate risk PCa electing for radiotherapy as definitive treatment. METHODS/DESIGN A total of 136 men with treatment naïve low or intermediate risk PCa will be randomized in a 1:1 ratio to 5 or 2 fractions of MR-guided SBRT using permuted block randomization. Randomization is stratified by baseline Expanded PCa Index Composite (EPIC) bowel and urinary domain scores. Patients undergoing 5 fractions will receive 37.5 Gy to the prostate over 10-14 days and patients undergoing 2 fractions will receive 25 Gy to the prostate over 7-10 days. The co-primary endpoints are GI and GU toxicities as measured by change scores in the bowel and urinary EPIC domains, respectively. The change scores will be calculated as pre-treatment (baseline) score subtracted from the 2-year score. DISCUSSION FORT is an international, multi-institutional prospective randomized phase II trial evaluating whether MR-guided SBRT delivered in 2 fractions versus 5 fractions is non-inferior from a gastrointestinal (GI) and genitourinary (GU) toxicity standpoint at 2 years post-treatment in men with low or intermediate risk PCa. TRIAL REGISTRATION Clinicaltrials.gov identifier: NCT04984343 . Date of registration: July 30, 2021. PROTOCOL VERSION 4.0, Nov 8, 2022.
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Affiliation(s)
- Sydney Wolfe
- Department of Radiation Oncology, Weill Cornell Medicine/NewYork-Presbyterian, 525 East 68th Street, N-046, Box 169, New York, NY, 10065, USA
| | - Marshall A Diven
- Department of Radiation Oncology, Brooklyn Methodist Hospital/New York-Presbyterian, Brooklyn, NY, USA
| | - Ariel E Marciscano
- Department of Radiation Oncology, Weill Cornell Medicine/NewYork-Presbyterian, 525 East 68th Street, N-046, Box 169, New York, NY, 10065, USA
| | - Xi Kathy Zhou
- Division of Biostatistics, Department of Population Health Sciences, Weill Cornell Medicine/NewYork-Presbyterian, New York, NY, USA
| | - A U Kishan
- Department of Radiation Oncology, University of California, Los Angeles, Los Angeles, CA, USA
| | - M L Steinberg
- Department of Radiation Oncology, University of California, Los Angeles, Los Angeles, CA, USA
| | | | | | - Himanshu Nagar
- Department of Radiation Oncology, Weill Cornell Medicine/NewYork-Presbyterian, 525 East 68th Street, N-046, Box 169, New York, NY, 10065, USA.
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15
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Lo Greco MC, Marletta G, Marano G, Fazio A, Buffettino E, Iudica A, Liardo RLE, Milazzotto R, Foti PV, Palmucci S, Basile A, Marletta F, Cuccia F, Ferrera G, Parisi S, Pontoriero A, Pergolizzi S, Spatola C. Hypofractionated Radiotherapy in Localized, Low-Intermediate-Risk Prostate Cancer: Current and Future Prospectives. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:1144. [PMID: 37374348 DOI: 10.3390/medicina59061144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 06/10/2023] [Accepted: 06/12/2023] [Indexed: 06/29/2023]
Abstract
At the time of diagnosis, the vast majority of prostate carcinoma patients have a clinically localized form of the disease, with most of them presenting with low- or intermediate-risk prostate cancer. In this setting, various curative-intent alternatives are available, including surgery, external beam radiotherapy and brachytherapy. Randomized clinical trials have demonstrated that moderate hypofractionated radiotherapy can be considered as a valid alternative strategy for localized prostate cancer. High-dose-rate brachytherapy can be administered according to different schedules. Proton beam radiotherapy represents a promising strategy, but further studies are needed to make it more affordable and accessible. At the moment, new technologies such as MRI-guided radiotherapy remain in early stages, but their potential abilities are very promising.
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Affiliation(s)
- Maria Chiara Lo Greco
- Radiation Oncology Unit, Department of Biomedical, Dental and Morphological and Functional Imaging Sciences, University of Messina, 98122 Messina, Italy
| | - Giulia Marletta
- Radiation Oncology Unit, Department of Biomedical, Dental and Morphological and Functional Imaging Sciences, University of Messina, 98122 Messina, Italy
| | - Giorgia Marano
- Radiation Oncology Unit, Department of Biomedical, Dental and Morphological and Functional Imaging Sciences, University of Messina, 98122 Messina, Italy
| | - Alessandro Fazio
- Radiology I Unit, Department of Medical Surgical Sciences and Advanced Technologies "G.F. Ingrassia", University of Catania, 95123 Catania, Italy
| | - Emanuele Buffettino
- Radiation Oncology Unit, Department of Biomedical, Dental and Morphological and Functional Imaging Sciences, University of Messina, 98122 Messina, Italy
| | - Arianna Iudica
- Radiation Oncology Unit, Department of Biomedical, Dental and Morphological and Functional Imaging Sciences, University of Messina, 98122 Messina, Italy
| | - Rocco Luca Emanuele Liardo
- Radiation Oncology Unit, Department of Medical Surgical Sciences and Advanced Technologies "G.F. Ingrassia", University of Catania, 95123 Catania, Italy
| | - Roberto Milazzotto
- Radiation Oncology Unit, Department of Medical Surgical Sciences and Advanced Technologies "G.F. Ingrassia", University of Catania, 95123 Catania, Italy
| | - Pietro Valerio Foti
- Radiology I Unit, Department of Medical Surgical Sciences and Advanced Technologies "G.F. Ingrassia", University of Catania, 95123 Catania, Italy
| | - Stefano Palmucci
- Radiology I Unit, Department of Medical Surgical Sciences and Advanced Technologies "G.F. Ingrassia", University of Catania, 95123 Catania, Italy
| | - Antonio Basile
- Radiology I Unit, Department of Medical Surgical Sciences and Advanced Technologies "G.F. Ingrassia", University of Catania, 95123 Catania, Italy
| | | | | | | | - Silvana Parisi
- Radiation Oncology Unit, Department of Biomedical, Dental and Morphological and Functional Imaging Sciences, University of Messina, 98122 Messina, Italy
| | - Antonio Pontoriero
- Radiation Oncology Unit, Department of Biomedical, Dental and Morphological and Functional Imaging Sciences, University of Messina, 98122 Messina, Italy
| | - Stefano Pergolizzi
- Radiation Oncology Unit, Department of Biomedical, Dental and Morphological and Functional Imaging Sciences, University of Messina, 98122 Messina, Italy
| | - Corrado Spatola
- Radiation Oncology Unit, Department of Medical Surgical Sciences and Advanced Technologies "G.F. Ingrassia", University of Catania, 95123 Catania, Italy
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16
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Two-fraction stereotactic ablative radiotherapy with simultaneous boost to MRI-defined dominant intra-prostatic lesion - Results from the 2SMART phase 2 trial. Radiother Oncol 2023; 181:109503. [PMID: 36754232 DOI: 10.1016/j.radonc.2023.109503] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/24/2023] [Accepted: 01/25/2023] [Indexed: 02/09/2023]
Abstract
PURPOSE This is the first report of the 2SMART Phase II trial evaluating the safety of two-fraction stereotactic ablative radiotherapy (SABR) with focal boost to magnetic resonance imaging (MRI) defined dominant intra-prostatic lesion (DIL) for localised prostate cancer. MATERIALS AND METHODS Men with low or intermediate risk prostate cancer were eligible for the study. The gross tumour volume (GTV) was MRI-defined DIL, and the clinical target volume (CTV) was entire prostate gland. The planning target volume (PTV) was a 2 mm expansion anteroposterior and lateral, and 2.5 mm superoinferior. The prescribed dose was 32 Gy to GTV, and 26 Gy to CTV. Primary endpoint was minimal clinically important change (MCIC) in quality of life (QOL) within 3-months of SABR, assessed using the EPIC-26 questionnaire. Secondary endpoints were acute and late toxicities (assessed using CTCAEv4), PSA nadir, and biochemical failure (based on Phoenix criteria). RESULTS Thirty men were enrolled in the study - 2 (7%) had low-risk and 28 (93%) had intermediate risk prostate cancer. The median follow-up was 44 months (range:39-49 months). The median PSA nadir was 0.25 ng/mL, with median time to nadir of 37 months. One patient (3%) had biochemical failure at 44 months post-treatment. Ten (33%), six (20%), and three (10%) men had acute MCIC in urinary, bowel, and sexual QOL domains respectively. No acute or late grade ≥ 3 urinary or bowel toxicities were observed. CONCLUSION This novel protocol of two-fraction prostate SABR with MRI-defined DIL boost is a safe approach for dose-escalation, with minimal impact on acute QOL and no grade ≥ 3 toxicities.
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17
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Large Prostate Volume Does Not Negatively Impact Health-Related Quality of Life in Patients with Prostate Cancer Treated with Ultrahypofractionated Stereotactic Body Radiotherapy. J Pers Med 2023; 13:jpm13020233. [PMID: 36836467 PMCID: PMC9967077 DOI: 10.3390/jpm13020233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 01/11/2023] [Accepted: 01/20/2023] [Indexed: 01/31/2023] Open
Abstract
BACKGROUND Survival outcomes after primary radiotherapy for localized prostate cancer (PCa) are excellent, regardless of the specific treatment modality. For this reason, health-related quality of life (HRQOL) has come to play an ever more important role in treatment selection. Stereotactic body radiation therapy (SBRT) is increasingly used to treat patients with PCa. However, the impact of prostate volume on HRQOL is not clear. In this study, we aimed to determine whether a large prostate volume negatively influences HRQOL outcomes in patients undergoing ultrahypofractionated SBRT. MATERIAL AND METHODS We conducted a prospective study of 530 men with low- and intermediate-risk localized PCa. All patients were treated from 2013 to 2017 with SBRT (Cyberknife system). HRQOL data were collected at baseline (pre-treatment), immediately after treatment, and at 12 and 24 months. QOL variables were assessed with the European Organization for Research and Treatment of Cancer QLQ-C30 and PR-25 module. Differences in the QLQ-C30 scales were considered clinically relevant when the change was >10 points. For the analysis, patients were classified into two groups according to prostate volume (≤60 vs. >60 cm3). RESULTS The prostate volume was ≤60 cm3 in 415 patients (78.3%) and >60 cm3 in 115 (21.7%). No between-group differences were observed at baseline for any of the following variables: clinical stage; hormonal therapy; marital status; educational level; or employment status. No clinically-significant deterioration (functional and symptom scales) was observed in either group between the baseline and 24-month assessment. There were no clinically-relevant differences between the groups on any of the HRQOL variables, regardless of the prostate volume. CONCLUSIONS This study shows that a large prostate volume (>60 cm3) does not appear to negatively impact HRQOL outcomes at two years in patients with localized prostate cancer treated with ultrahypofractionated SBRT administered with the CyberKnife system.
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18
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Leung E, Gladwish AP, Davidson M, Taggar A, Velker V, Barnes E, Mendez L, Donovan E, Gien LT, Covens A, Vicus D, Kupets R, MacKay H, Han K, Cheung P, Zhang L, Loblaw A, D’Souza DP. Quality-of-Life Outcomes and Toxic Effects Among Patients With Cancers of the Uterus Treated With Stereotactic Pelvic Adjuvant Radiation Therapy: The SPARTACUS Phase 1/2 Nonrandomized Controlled Trial. JAMA Oncol 2022; 8:1-9. [PMID: 35420695 PMCID: PMC9011178 DOI: 10.1001/jamaoncol.2022.0362] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
IMPORTANCE Adjuvant radiation plays an important role in reducing locoregional recurrence in patients with uterine cancer. Although hypofractionated radiotherapy may benefit health care systems and the global community while decreasing treatment burden for patients traveling for daily radiotherapy, it has not been studied prospectively nor in randomized trials for treatment of uterine cancers, and the associated toxic effects and patient quality of life are unknown. OBJECTIVE To evaluate acute genitourinary and bowel toxic effects and patient-reported outcomes following stereotactic hypofractionated adjuvant radiation to the pelvis for treatment of uterine cancer. DESIGN, SETTING, AND PARTICIPANTS The Stereotactic Pelvic Adjuvant Radiation Therapy in Cancers of the Uterus (SPARTACUS) phase 1/2 nonrandomized controlled trial of patients accrued between May 2019 and August 2021 was conducted as a multicenter trial at 2 cancer centers in Ontario, Canada. In total, 61 patients with uterine cancer stages I through III after surgery entered the study. INTERVENTIONS Stereotactic adjuvant pelvic radiation to a dose of 30 Gy in 5 fractions administered every other day or once weekly. MAIN OUTCOMES AND MEASURES Assessments of toxic effects and patient-reported quality of life (European Organisation for Research and Treatment of Cancer Quality of Life Questionnaires C30 and endometrial EN24) were collected at baseline, fractions 3 and 5, and at 6 weeks and 3 months of follow-up. Descriptive analysis was conducted, calculating means, SDs, medians, IQRs, and ranges for continuous variables and proportions for categorical variables. Univariate generalized linear mixed models were generated for repeated measurements on the quality-of-life scales. RESULTS A total of 61 patients were enrolled (median age, 66 years; range, 51-88 years). Tumor histologic results included 39 endometrioid adenocarcinoma, 15 serous or clear cell, 3 carcinosarcoma, and 4 dedifferentiated. Sixteen patients received sequential chemotherapy, and 9 received additional vault brachytherapy. Median follow-up was 9 months (IQR, 3-15 months). Of 61 patients, worst acute gastrointestinal tract toxic effects of grade 1 were observed in 33 patients (54%) and of grade 2 in 8 patients (13%). For genitourinary worst toxic effects, grade 1 was observed in 25 patients (41%) and grade 2 in 2 patients (3%). One patient (1.6%) had an acute grade 3 gastrointestinal tract toxic effect of diarrhea at fraction 5 that resolved at follow-up. Only patient-reported diarrhea scores were both clinically (scores ≥10) and statistically significantly worse at fraction 5 (mean [SD] score, 35.76 [26.34]) compared with baseline (mean [SD] score, 6.56 [13.36]; P < .001), but this symptom improved at follow-up. CONCLUSIONS AND RELEVANCE Results of this phase 1/2 nonrandomized controlled trial suggest that stereotactic hypofractionated radiation was well tolerated at short-term follow-up for treatment of uterine cancer. Longer follow-up and future randomized studies are needed to further evaluate this treatment. TRIAL REGISTRATION ClinicalTrials.gov Identifier: NCT04866394.
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Affiliation(s)
- Eric Leung
- Department of Radiation Oncology, Sunnybrook Health Sciences Centre, Odette Cancer Centre, University of Toronto, Toronto, Ontario, Canada
| | - Adam P. Gladwish
- Department of Radiation Oncology, Royal Victoria Hospital, University of Toronto, Barrie, Ontario, Canada
| | - Melanie Davidson
- Department of Radiation Oncology, Sunnybrook Health Sciences Centre, Odette Cancer Centre, University of Toronto, Toronto, Ontario, Canada
| | - Amandeep Taggar
- Department of Radiation Oncology, Sunnybrook Health Sciences Centre, Odette Cancer Centre, University of Toronto, Toronto, Ontario, Canada
| | - Vikram Velker
- Division of Radiation Oncology, Department of Oncology, London Health Sciences Centre, Western University, London, Ontario, Canada
| | - Elizabeth Barnes
- Department of Radiation Oncology, Sunnybrook Health Sciences Centre, Odette Cancer Centre, University of Toronto, Toronto, Ontario, Canada
| | - Lucas Mendez
- Division of Radiation Oncology, Department of Oncology, London Health Sciences Centre, Western University, London, Ontario, Canada
| | - Elysia Donovan
- Department of Radiation Oncology, Sunnybrook Health Sciences Centre, Odette Cancer Centre, University of Toronto, Toronto, Ontario, Canada
| | - Lilian T. Gien
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Sunnybrook Health Sciences Centre, Odette Cancer Centre, University of Toronto, Toronto, Ontario, Canada
| | - Allan Covens
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Sunnybrook Health Sciences Centre, Odette Cancer Centre, University of Toronto, Toronto, Ontario, Canada
| | - Danielle Vicus
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Sunnybrook Health Sciences Centre, Odette Cancer Centre, University of Toronto, Toronto, Ontario, Canada
| | - Rachel Kupets
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Sunnybrook Health Sciences Centre, Odette Cancer Centre, University of Toronto, Toronto, Ontario, Canada
| | - Helen MacKay
- Divison of Medical Oncology and Hematology, Sunnybrook Health Sciences Centre, Odette Cancer Centre, University of Toronto, Toronto, Ontario, Canada
| | - Kathy Han
- Department of Radiation Oncology, Princess Margaret Cancer Centre, University of Toronto, Toronto, Ontario, Canada
| | - Patrick Cheung
- Department of Radiation Oncology, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - Liying Zhang
- Department of Radiation Oncology, Sunnybrook Health Sciences Centre, Odette Cancer Centre, University of Toronto, Toronto, Ontario, Canada
| | - Andrew Loblaw
- Department of Radiation Oncology, Sunnybrook Health Sciences Centre, Odette Cancer Centre, University of Toronto, Toronto, Ontario, Canada
| | - David P. D’Souza
- Division of Radiation Oncology, Department of Oncology, London Health Sciences Centre, Western University, London, Ontario, Canada
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Yamashita H, Ogita M, Sawayanagi S, Nozawa Y, Abe O. Quality of life after definitive linear accelerator-based stereotactic radiotherapy for prostate cancer: a longitudinal study. Radiat Oncol 2022; 17:90. [PMID: 35545795 PMCID: PMC9097176 DOI: 10.1186/s13014-022-02061-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Accepted: 04/28/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Prostate cancer is the second most common malignancy worldwide, and the majority of patients are diagnosed with localized disease. We examined patients' quality of life after stereotactic body radiation therapy (SBRT) for prostate cancer. METHODS We included patients who were treated between 2016 and 2020. Inclusion criteria were adenocarcinoma of the prostate; class risk of low, intermediate, and high; and a World Health Organization performance status of 0-2. Quality of life was measured using the Functional Assessment of Cancer Therapy-Prostate (FACT-P). RESULTS A total of 439 patients were treated with SBRT, with a median age of 73 years old. The median follow-up period was 34 months. FACT-P Trial Outcome Index (p < 0.0001), FACT-General (p = 0.0003), and FACT-P-Total (p < 0.0001) scores declined at 1 month post-SBRT, then recovered and returned to the same level as before treatment at 3-4 months post-SBRT. The decrease in quality of life in the first month was particularly remarkable in patients who received long-term hormone injections (36%). One month after the end of SBRT, about 22% of patients experienced "quite a bit" or more troubling side effects. CONCLUSIONS This study showed longitudinal changes in quality of life by FACT-P after SBRT for prostate cancer. Overall, prostate SBRT was well tolerated.
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Affiliation(s)
- Hideomi Yamashita
- Department of Radiology, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
| | - Mami Ogita
- Department of Radiology, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Subaru Sawayanagi
- Department of Radiology, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Yuki Nozawa
- Department of Radiology, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Osamu Abe
- Department of Radiology, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
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20
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Glicksman R, Kishan A, Quon H, Shabsovich D, Juarez J, Jiang T, Steinberg M, Zhang L, Loblaw A. Absolute Percentage of Pattern 4 Disease as a Prognostic Measure for Intermediate-risk Prostate Cancer Treated with Stereotactic Body Radiotherapy. Clin Oncol (R Coll Radiol) 2022; 34:581-588. [DOI: 10.1016/j.clon.2022.05.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 04/13/2022] [Accepted: 05/05/2022] [Indexed: 11/25/2022]
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21
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A comparative study of patient-reported outcomes after contemporary radiation techniques for prostate cancer. Radiother Oncol 2022; 171:164-172. [DOI: 10.1016/j.radonc.2022.04.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 04/20/2022] [Accepted: 04/25/2022] [Indexed: 11/19/2022]
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22
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Lapierre A, Hennequin C, Beneux A, Belhomme S, Benziane N, Biston MC, Crehange G, de Crevoisier R, Dumas JL, Fawzi M, Lisbona A, Pasquier D, Pelissier S, Graff-Cailleaud P, Pommier P, Sargos P, Simon JM, Supiot S, Tantot F, Chapet O. Highly hypofractionated schedules for localized prostate cancer: Recommendations of the GETUG radiation oncology group. Crit Rev Oncol Hematol 2022; 173:103661. [PMID: 35341986 DOI: 10.1016/j.critrevonc.2022.103661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 01/25/2022] [Accepted: 03/21/2022] [Indexed: 10/18/2022] Open
Abstract
Stereotactic body radiotherapy (SBRT) has become treatment option for localized prostate cancer but the evidence base remains incomplete. Several clinical studies, both prospective and retrospective, have been published. However, treatment techniques, target volumes and dose constraints lack consistency between studies. Based on the current available literature, the French Genito-Urinary Group (GETUG) suggests that.
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Affiliation(s)
- Ariane Lapierre
- Ariane Lapierre: Département of de radiothérapie oncologie, centre hospitalier universitaire Lyon Sud, 165, chemin du Grand-Revoyet, 69495 Pierre-Bénite, France; Université de Lyon, 69000 Lyon, France
| | - Christophe Hennequin
- Christophe Hennequin: Department of Radiation Oncology, Hôpital Saint-Louis, 75475, Paris, France
| | - Amandine Beneux
- Amandine Beneux: Service de Physique Médicale et de Radioprotection, centre hospitalier universitaire Lyon Sud, 165, chemin du Grand-Revoyet, 69495 Pierre-Bénite, France
| | - Sarah Belhomme
- Sarah Belhomme: Radiation Oncology Department, Bergonie Institute, 229, cours de l'Argonne, 33076 Bordeaux Cedex, France
| | - Nicolas Benziane
- Nicolas Benziane: Radiation Oncology Department, Bergonie Institute, 229, cours de l'Argonne, 33076 Bordeaux Cedex, France
| | - Marie-Claude Biston
- Marie-Claude Biston: Léon Bérard Cancer Center, University of Lyon, France; Université de Lyon, CREATIS, CNRS UMR5220, Inserm U1044, INSA, Lyon, France
| | - Gilles Crehange
- Gilles Crehange: Département de radiothérapie oncologique, institut Curie, 26, rue d'Ulm, 75005 Paris, France
| | - Renaud de Crevoisier
- Renaud de Crevoisier: Département de Radiothérapie, Centre Eugène Marquis, Rennes
| | - Jean-Luc Dumas
- Jean-luc Dumas: Institut Curie, Radiotherapy department / Medical physics, 26 rue d'Ulm, 75005 PARIS cedex, France
| | - Maher Fawzi
- Maher Fawzi: Institut Curie, Site Saint Cloud, Service de Radiotherapie, 35, rue Dailly 92210 Saint Cloud
| | - Albert Lisbona
- Albert Lisbona: Medical Physics Department Institut de Cancérologie de l'Ouest, Bd J. Monod, 44805 Saint Herblain France
| | - David Pasquier
- David Pasquier: Academic Department of Radiation Oncology, Centre Oscar Lambret, Lille; CRIStAL UMR 9189, Lille University
| | | | - Pierre Graff-Cailleaud
- Pierre Graff-Cailleaud: University Institute of Cancer Toulouse-Oncopôle, Toulouse, France
| | - Pascal Pommier
- Pascal Pommier: Radiotherapy Department, Centre Léon Bérard, Lyon, France
| | - Paul Sargos
- Paul Sargos: Radiation Oncology Department, Bergonie Institute, Bordeaux, France
| | - Jean-Marc Simon
- Jean-Marc Simon: Department of Radiotherapy, Sorbonne Université, Assistance Publique-Hôpitaux de Paris, Pitié-Salpêtrière University Hospital, Paris, France
| | - Stéphane Supiot
- Stéphane Supiot: Department of Radiation Oncology, Institut de Cancérologie de l'Ouest, Nantes, St-Herblain, France
| | | | - Olivier Chapet
- Département of de radiothérapie oncologie, centre hospitalier universitaire Lyon Sud, 165, chemin du Grand-Revoyet, 69495 Pierre-Bénite, France; Université de Lyon, 69000 Lyon, France
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23
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Two-fraction stereotactic ablative radiotherapy (SABR) versus two-fraction high dose rate (HDR) brachytherapy for localized prostate cancer: Does dose heterogeneity matter? Radiother Oncol 2022; 169:51-56. [DOI: 10.1016/j.radonc.2022.02.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 01/28/2022] [Accepted: 02/04/2022] [Indexed: 12/25/2022]
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24
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Corkum MT, Achard V, Morton G, Zilli T. Ultrahypofractionated Radiotherapy for Localised Prostate Cancer: How Far Can We Go? Clin Oncol (R Coll Radiol) 2021; 34:340-349. [PMID: 34961659 DOI: 10.1016/j.clon.2021.12.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 10/07/2021] [Accepted: 12/10/2021] [Indexed: 01/23/2023]
Abstract
Following adoption of moderately hypofractionated radiotherapy as a standard for localised prostate cancer, ultrahypofractioned radiotherapy delivered in five to seven fractions is rapidly being embraced by clinical practice and international guidelines. However, the question remains: how low can we go? Can radiotherapy for prostate cancer be delivered in fewer than five fractions? The current review summarises the evidence that radiotherapy for localised prostate cancer can be safely and effectively delivered in fewer than five fractions using high dose rate brachytherapy or stereotactic body radiotherapy. We also discuss important lessons learned from the single-fraction high dose rate brachytherapy experience.
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Affiliation(s)
- M T Corkum
- Division of Radiation Oncology, Department of Radiology, The Ottawa Hospital, Ottawa, Ontario, Canada
| | - V Achard
- Division of Radiation Oncology, Department of Oncology, Geneva University Hospitals and Faculty of Medicine, Geneva University, Geneva, Switzerland
| | - G Morton
- Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
| | - T Zilli
- Division of Radiation Oncology, Department of Oncology, Geneva University Hospitals and Faculty of Medicine, Geneva University, Geneva, Switzerland.
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25
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Schaule J, Chamberlain M, Wilke L, Baumgartl M, Krayenbühl J, Zamburlini M, Mayinger M, Andratschke N, Tanadini-Lang S, Guckenberger M. Intrafractional stability of MR-guided online adaptive SBRT for prostate cancer. Radiat Oncol 2021; 16:189. [PMID: 34565439 PMCID: PMC8474766 DOI: 10.1186/s13014-021-01916-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Accepted: 09/15/2021] [Indexed: 12/25/2022] Open
Abstract
Background MR-guided online adaptive stereotactic body radiation therapy (SBRT) for prostate cancer aims to reduce toxicity by full compensation of interfractional uncertainties. However, the process of online adaptation currently takes approximately 45 min during which intrafractional movements remain unaccounted for. This study aims to analyze the dosimetric benefit of online adaptation and to evaluate its robustness over the duration of one treatment fraction. Methods Baseline MR-scans at a MR-linear accelerator were acquired for ten healthy male volunteers for generation of mock-prostate SBRT plans with a dose prescription of 5 × 7.25 Gy. On a separate day, online MR-guided adaptation (ViewRay® MRIdian) was performed, and thereafter MR images were acquired every 15 min for 1 h to assess the stability of the adapted plan. Results A dosimetric benefit of online MR-guided adaptive re-planning was observed in 90% of volunteers. The median D95CTV- and D95PTV-coverage was improved from 34.8 to 35.5 Gy and from 30.7 to 34.6 Gy, respectively. Improved target coverage was not associated with higher dose to the organs at risk, most importantly the rectum (median D1ccrectum baseline plan vs. adapted plan 33.3 Gy vs. 32.3 Gy). The benefit of online adaptation remained stable over 45 min for all volunteers. However, at 60 min, CTV-coverage was below a threshold of 32.5 Gy in 30% of volunteers (30.6 Gy, 32.0 Gy, 32.3 Gy). Conclusion The dosimetric benefit of MR-guided online adaptation for prostate SBRT was robust over 45 min in all volunteers. However, intrafractional uncertainties became dosimetrically relevant at 60 min and we therefore recommend verification imaging before delivery of MR-guided online adapted SBRT. Supplementary Information The online version contains supplementary material available at 10.1186/s13014-021-01916-0.
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Affiliation(s)
- J Schaule
- Department of Radiation Oncology, University Hospital Zurich, Rämistrasse 100, 8091, Zurich, Switzerland.
| | - M Chamberlain
- Department of Radiation Oncology, University Hospital Zurich, Rämistrasse 100, 8091, Zurich, Switzerland
| | - L Wilke
- Department of Radiation Oncology, University Hospital Zurich, Rämistrasse 100, 8091, Zurich, Switzerland
| | - M Baumgartl
- Department of Radiation Oncology, University Hospital Zurich, Rämistrasse 100, 8091, Zurich, Switzerland
| | - J Krayenbühl
- Department of Radiation Oncology, University Hospital Zurich, Rämistrasse 100, 8091, Zurich, Switzerland
| | - M Zamburlini
- Department of Radiation Oncology, University Hospital Zurich, Rämistrasse 100, 8091, Zurich, Switzerland
| | - M Mayinger
- Department of Radiation Oncology, University Hospital Zurich, Rämistrasse 100, 8091, Zurich, Switzerland
| | - N Andratschke
- Department of Radiation Oncology, University Hospital Zurich, Rämistrasse 100, 8091, Zurich, Switzerland
| | - S Tanadini-Lang
- Department of Radiation Oncology, University Hospital Zurich, Rämistrasse 100, 8091, Zurich, Switzerland
| | - M Guckenberger
- Department of Radiation Oncology, University Hospital Zurich, Rämistrasse 100, 8091, Zurich, Switzerland
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26
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Extreme Hypofractionation with SBRT in Localized Prostate Cancer. Curr Oncol 2021; 28:2933-2949. [PMID: 34436023 PMCID: PMC8395496 DOI: 10.3390/curroncol28040257] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 07/24/2021] [Accepted: 07/27/2021] [Indexed: 02/07/2023] Open
Abstract
Prostate cancer is the most commonly diagnosed cancer among men around the world. Radiotherapy is a standard of care treatment option for men with localized prostate cancer. Over the years, radiation delivery modalities have contributed to increased precision of treatment, employing radiobiological insights to shorten the overall treatment time, improving the control of the disease without increasing toxicities. Stereotactic body radiation therapy (SBRT) represents an extreme form of hypofractionated radiotherapy in which treatment is usually delivered in 1–5 fractions. This review assesses the main efficacy and toxicity data of SBRT in non-metastatic prostate cancer and discusses the potential to implement this scheme in routine clinical practice.
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27
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Nasser NJ, Klein J, Fenig E, Agbarya A. Automatic localization of the prostatic urethra for image guided radiation therapy. Tech Innov Patient Support Radiat Oncol 2021; 19:1-6. [PMID: 34189284 PMCID: PMC8215297 DOI: 10.1016/j.tipsro.2021.05.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 05/27/2021] [Accepted: 05/27/2021] [Indexed: 11/28/2022] Open
Abstract
Prostatic urethra can be used for image guided radiation for prostate cancer. Computer “finds” the urethra by digital subtraction of scans with / without contrast. Urethra segmentation used to setup the patient and position prostate as in simulation. A catheter with continuous aerated gel flow is used to detect the urethra under US.
Treatment of prostate cancer with radiation therapy (RT) requires image guided RT (IGRT) to focus the radiation on the target volumes while minimizing doses to organs at risk. Here we describe a urinary catheter that allows imaging of the prostatic urethra and uses it for automatic localization of the prostate for IGRT. The catheter has a contrast lumen that can be empty or full with contrast. Computerized tomography is performed twice, with contrast lumen empty and full, allowing urethral autosegmentation using digital subtraction. Under ultrasound, continuous urethral visualization is possible by pumping aerated gel in- and out of the contrast lumen.
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Affiliation(s)
- Nicola J Nasser
- Department of Radiation Oncology, University of Maryland School of Medicine, Maryland Proton Treatment Center, Baltimore, MD, USA
| | - Jonathan Klein
- Department of Radiation Oncology, Montefiore Medical Center and Albert Einstein College of Medicine, Bronx, NY, USA
| | - Eyal Fenig
- Institute of Oncology, Davidoff Center, Rabin Medical Center, Beilinson Hospital, Petah Tikva, Israel
| | - Abed Agbarya
- Institute of Oncology, Bnai Zion Medical Center, Haifa, Israel
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28
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Tsang YM, Tharmalingam H, Belessiotis-Richards K, Armstrong S, Ostler P, Hughes R, Alonzi R, Hoskin PJ. Ultra-hypofractionated radiotherapy for low- and intermediate risk prostate cancer: High-dose-rate brachytherapy vs stereotactic ablative radiotherapy. Radiother Oncol 2021; 158:184-190. [PMID: 33639192 DOI: 10.1016/j.radonc.2021.02.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 02/16/2021] [Accepted: 02/18/2021] [Indexed: 11/25/2022]
Abstract
PURPOSE To compare the biochemical control rates (BCRs), late gastrointestinal (GI) and genitourinary (GU) toxicities in patients with low- and intermediate risk prostate cancer (PCa) treated with high-dose-rate brachytherapy (HDR BT) of 19 Gy/1 fraction, 26 Gy/2 fractions, or stereotactic ablative radiotherapy (SABR) of 36.25 Gy/5 fractions. METHODS AND MATERIALS Between August 2008 and December 2017, patients with low- and intermediate risk PCa who received single dose or 2-fraction HDR BT, or 5-fraction SABR at a single institution were included. BCR for the whole population and the individual treatment groups were calculated using the Phoenix definition. Post treatment GI and GU toxicities were evaluated according to the CTCAE v4.0 guidelines. RESULTS 185 patients with low- and intermediate risk PCa were included in this study with a median follow up of 60.5 months. BCRs at 3 and 5 years were 95% and 85% for all patients. The 5-year BCRs were 69%, 95% and 92% for the 19 Gy/1 fraction, 26 Gy/2 fractions and 36.25 Gy/5 fractions groups respectively. The cumulative 5-year incidence rates of ≥grade 2 GI events in the 19 Gy/1fr, 26 Gy/2fr and 36.25 Gy/5fr groups were 0%, 2% and 4%, respectively. Incidence rates in those treated in the 5-fraction SABR arm were significantly higher (p < 0.05) than those treated in both HDR BT arms where no statistically significant difference between the two HDR BT groups was seen (p = 0.15). The cumulative 5-year incidence rates of ≥grade 2 GU events in the 19 Gy/1fr, 26 Gy/2fr and 36.25 Gy/5fr groups were 30%, 5% and 6%, respectively. No statistically significant difference was found between the 26 Gy/2fr and 36.25 Gy/5fr (p = 0.37) treatment arms but the incidence rate in the 26 Gy/2fr were significantly lower than those seen after 19 Gy/1fr (p < 0.05). CONCLUSIONS 26 Gy/2 fractions HDR BT provided equivalent BCR with lower toxicity compared to 36.25 Gy/5 fractions SABR. Both 2-fraction HBR BT and 5-fraction SABR achieved better BCRs than single dose 19 Gy HDR BT. The two-fraction HDR BT schedule should be considered as an important comparator in future clinical trials.
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Affiliation(s)
| | | | | | | | | | | | | | - Peter J Hoskin
- Mount Vernon Cancer Centre, Northwood, UK; Division of Cancer Sciences, Faculty of Biology Medicine and Health, University of Manchester, United Kingdom
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29
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Nasser NJ, Fenig E, Klein J, Agbarya A. Maintaining consistent bladder filling during external beam radiotherapy for prostate cancer. Tech Innov Patient Support Radiat Oncol 2021; 17:1-4. [PMID: 33553698 PMCID: PMC7851838 DOI: 10.1016/j.tipsro.2021.01.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 12/23/2020] [Accepted: 01/11/2021] [Indexed: 12/03/2022] Open
Abstract
Radiation for prostate cancer is preferably provided with a full urinary bladder. There are discrepancies how well current methods achieve consistent bladder filling. A urinary catheter with a check-valve controlled by a float is under development.
Radiation therapy for patients with prostate cancer is preferably provided with a full urinary bladder. Full bladder can potentially move the small intestine out of the radiation treatment regions, and results in decreased small bowel radiation dose and gastrointestinal toxicity. Maintaining consistent bladder filling during computerized tomography simulation scan used for treatment planning and at daily radiation treatments is challenging. Here we present an in-development urinary catheter with a floating balloon that drains the bladder only when urine reaches to a prespecified level, and review current methods used in clinic to ensure consistent bladder filling. These includes bladder filling protocols, ultrasound scanning and biofeedback techniques.
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Affiliation(s)
- Nicola J. Nasser
- Department of Radiation Oncology, University of Maryland School of Medicine, Maryland Proton Treatment Center, Baltimore, MD, USA
- Corresponding author at: University of Maryland School of Medicine, Department of Radiation Oncology, Maryland Proton Treatment Center, Baltimore, MD, USA.
| | - Eyal Fenig
- Institute of Oncology, Davidoff Center, Rabin Medical Center, Beilinson Hospital, Petah Tikva, Israel
| | - Jonathan Klein
- Department of Radiation Oncology, Montefiore Medical Center and Albert Einstein College of Medicine, Bronx, NY, USA
| | - Abed Agbarya
- Institute of Oncology, Bnai Zion Medical Center, Haifa, Israel
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Ablative Radiotherapy in Prostate Cancer: Stereotactic Body Radiotherapy and High Dose Rate Brachytherapy. Cancers (Basel) 2020; 12:cancers12123606. [PMID: 33276562 PMCID: PMC7761604 DOI: 10.3390/cancers12123606] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 11/29/2020] [Accepted: 11/30/2020] [Indexed: 02/06/2023] Open
Abstract
Simple Summary Radiation therapy is a standard of care treatment option for men with localized prostate cancer. Over the years, various radiation delivery modalities have contributed to the increased precision of radiation, employing radiobiological insights to shorten the overall treatment time with hypofractionation, while improving oncological control without increasing toxicities. Here, we discuss and compare two ablative radiation modalities, stereotactic body radiation therapy (SBRT) and high-dose-rate brachytherapy (HDRBT), in terms of oncological control, dose/fractionation and toxicities in men with localized prostate cancer. This review will highlight the levels of evidence available to support either modality as a monotherapy, will summarize safety and efficacy, help clinicians gain a deeper understanding of the safety and efficacy profiles of these two modalities, and highlight ongoing research efforts to address many unanswered questions regarding ablative prostate radiation. Abstract Prostate cancer (PCa) is the most common noncutaneous solid organ malignancy among men worldwide. Radiation therapy is a standard of care treatment option that has historically been delivered in the form of small daily doses of radiation over the span of multiple weeks. PCa appears to have a unique sensitivity to higher doses of radiation per fraction, rendering it susceptible to abbreviated forms of treatment. Stereotactic body radiation therapy (SBRT) and high-dose-rate brachytherapy (HDRBT) are both modern radiation modalities that allow the precise delivery of ablative doses of radiation to the prostate while maximally sparing sensitive surrounding normal structures. In this review, we highlight the evidence regarding the radiobiology, oncological outcomes, toxicity and dose/fractionation schemes of SBRT and HDRBT monotherapy in men with low-and intermediate-risk PCa.
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31
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Byun DJ, Gorovets DJ, Jacobs LM, Happersett L, Zhang P, Pei X, Burleson S, Zhang Z, Hunt M, McBride S, Kollmeier MA, Zelefsky MJ. Strict bladder filling and rectal emptying during prostate SBRT: Does it make a dosimetric or clinical difference? Radiat Oncol 2020; 15:239. [PMID: 33066781 PMCID: PMC7565753 DOI: 10.1186/s13014-020-01681-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 10/06/2020] [Indexed: 01/01/2023] Open
Abstract
Background To evaluate inter-fractional variations in bladder and rectum during prostate stereotactic body radiation therapy (SBRT) and determine dosimetric and clinical consequences. Methods Eighty-five patients with 510 computed tomography (CT) images were analyzed. Median prescription dose was 40 Gy in 5 fractions. Patients were instructed to maintain a full bladder and empty rectum prior to simulation and each treatment. A single reviewer delineated organs at risk (OARs) on the simulation (Sim-CT) and Cone Beam CTs (CBCT) for analyses. Results Bladder and rectum volume reductions were observed throughout the course of SBRT, with largest mean reductions of 86.9 mL (19.0%) for bladder and 6.4 mL (8.7%) for rectum noted at fraction #5 compared to Sim-CT (P < 0.01). Higher initial Sim-CT bladder volumes were predictive for greater reduction in absolute bladder volume during treatment (ρ = − 0.69; P < 0.01). Over the course of SBRT, there was a small but significant increase in bladder mean dose (+ 4.5 ± 12.8%; P < 0.01) but no significant change in the D2cc (+ 0.8 ± 4.0%; P = 0.28). The mean bladder trigone displacement was in the anterior direction (+ 4.02 ± 6.59 mm) with a corresponding decrease in mean trigone dose (− 3.6 ± 9.6%; P < 0.01) and D2cc (− 6.2 ± 15.6%; P < 0.01). There was a small but significant increase in mean rectal dose (+ 7.0 ± 12.9%, P < 0.01) but a decrease in rectal D2cc (− 2.2 ± 10.1%; P = 0.04). No significant correlations were found between relative bladder volume changes, bladder trigone displacements, or rectum volume changes with rates of genitourinary or rectal toxicities. Conclusions Despite smaller than expected bladder and rectal volumes at the time of treatment compared to the planning scans, dosimetric impact was minimal and not predictive of detrimental clinical outcomes. These results cast doubt on the need for excessively strict bladder filling and rectal emptying protocols in the context of image guided prostate SBRT and prospective studies are needed to determine its necessity.
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Affiliation(s)
- David J Byun
- Department of Radiation Oncology, NYU Langone Health, 160 East 34th St, New York, NY, USA
| | - Daniel J Gorovets
- Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, 1275 York Ave, New York, NY, 10065, USA
| | - Lauren M Jacobs
- Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, 1275 York Ave, New York, NY, 10065, USA
| | - Laura Happersett
- Department of Medical Physics, Memorial Sloan Kettering Cancer Center, 1275 York Ave, New York, NY, USA
| | - Pengpeng Zhang
- Department of Medical Physics, Memorial Sloan Kettering Cancer Center, 1275 York Ave, New York, NY, USA
| | - Xin Pei
- Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, 1275 York Ave, New York, NY, USA
| | - Sarah Burleson
- Department of Medical Physics, Memorial Sloan Kettering Cancer Center, 1275 York Ave, New York, NY, USA
| | - Zhigang Zhang
- Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, 1275 York Ave, New York, NY, USA
| | - Margie Hunt
- Department of Medical Physics, Memorial Sloan Kettering Cancer Center, 1275 York Ave, New York, NY, USA
| | - Sean McBride
- Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, 1275 York Ave, New York, NY, 10065, USA
| | - Marisa A Kollmeier
- Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, 1275 York Ave, New York, NY, 10065, USA
| | - Michael J Zelefsky
- Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, 1275 York Ave, New York, NY, 10065, USA.
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Gleeson I. A comparison of a moderately hypofractionated IMRT planning technique used in a randomised UK external beam radiotherapy trial with an in-house technique for localised prostate cancer. Rep Pract Oncol Radiother 2020; 25:360-366. [PMID: 32256220 DOI: 10.1016/j.rpor.2020.03.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 12/26/2019] [Accepted: 03/10/2020] [Indexed: 11/18/2022] Open
Abstract
AIM To compare the radiotherapy technique used in a randomised trial with VMAT and an in-house technique for prostate cancer. BACKGROUND Techniques are evolving with volumetric modulated arc therapy (VMAT) commonly used. The CHHiP trial used a 3 PTV forward planned IMRT technique (FP_CH). Our centre has adopted a simpler two PTV technique with locally calculated margins. MATERIALS AND METHODS 25 patients treated with FP_CH to 60 Gy in 20 fractions were re-planned with VMAT (VMAT_CH) and a two PTV protocol (VMAT_60/52 and VMAT_60/48). Target coverage, conformity index (CI), homogeneity index (HI), monitor units (MU) and dose to the rectum, bladder, hips and penile bulb were compared. RESULTS PTV coverage was high for all techniques. VMAT_CH plans had better CI than FP_CH (p ≤ 0.05). VMAT_60/52/48 plans had better CI than VMAT_CH. FP_CH had better HI and fewer MU than VMAT (p ≤ 0.05). More favourable rectum doses were found for VMAT _CH than FP_CH (V48.6, V52.8, V57, p ≤ 0.05) with less difference for bladder (p ≥ 0.05). Comparing VMAT_CH to VMAT_60/52/48 showed little differences for the bladder and rectum but VMAT_CH had larger penile bulb doses (V40.8, V48.6, mean, D2, p ≤ 0.05). Femoral head doses (V40.8) were similarly low for all techniques (p = ≥ 0.05). CONCLUSION VMAT produced more conformal plans with smaller rectum doses compared to FP_CH albeit worse HI and more MU. VMAT_60/52 and VMAT_60/48 plans had similar rectal and bladder doses to VMAT_CH but better CI and penile bulb doses which may reduce toxicity.
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Affiliation(s)
- Ian Gleeson
- Department of Medical Physics, Addenbrooke's Hospital, Cambridge CB2 0QQ, UK
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33
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Weimin S, Abula A, Qianghong D, Wenguang W. Chimeric cytokine receptor enhancing PSMA-CAR-T cell-mediated prostate cancer regression. Cancer Biol Ther 2020; 21:570-580. [PMID: 32208880 DOI: 10.1080/15384047.2020.1739952] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Objective: Chimeric antigen receptor T (CAR-T) cell therapy has demonstrated an unprecedented therapeutic efficacy in hematological malignancies; however, its effectiveness in solid tumors remains elusive. In order to enable CAR-T cells more effective to solid tumors, a inverted chimeric cytokine receptor (ICR) was designed, which is consists of the TGF-β extracellular domain, IL-7 receptor intracellular domain, and co-expression on CAR-T cells.Materials and Methods: We selected prostate specific membrane antigen (PSMA) as a target for CAR-T cells, constructed corresponding effector cells, and verified the anti-tumor activity of this enhanced PSMA-CAR-T cell by a series of repeated target cell stimulation experiments in vitro and the anti-tumor capabilities by using mice xenograft model in vivo.Results: In vitro experiments showed that co-expression of ICR could significantly enhance sustained anti-tumor capabilities of PSMA-CAR-T cells. Moreover, in vivo experiments also confirmed that the enhanced PSMA-CAR-T cells exhibited significant superior anti-tumor capabilities and could prolong the survival time in the xenograft and PDX models of prostate cancer.Conclusions: PSMA-CAR-T cells co-expressing ICR can be envisaged as a new therapeutic strategy for prostate cancer and support the translation of this enhanced approach in the clinical setting.
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Affiliation(s)
- Shao Weimin
- Reproductive medicine Center, The First Affiliated Hospital of Xinjiang Medical University, China
| | - Asimujiang Abula
- Department of Urology, The First Affiliated Hospital of Xinjiang Medical University, China
| | - Ding Qianghong
- Department of Urology, Fourth People's Hospital of Shenzhen Longgang District, Shenzhen, China
| | - Wang Wenguang
- Department of Urology, The First Affiliated Hospital of Xinjiang Medical University, China
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Murray JR, Tree AC, Alexander EJ, Sohaib A, Hazell S, Thomas K, Gunapala R, Parker CC, Huddart RA, Gao A, Truelove L, McNair HA, Blasiak-Wal I, deSouza NM, Dearnaley D. Standard and Hypofractionated Dose Escalation to Intraprostatic Tumor Nodules in Localized Prostate Cancer: Efficacy and Toxicity in the DELINEATE Trial. Int J Radiat Oncol Biol Phys 2020; 106:715-724. [PMID: 31812718 DOI: 10.1016/j.ijrobp.2019.11.402] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 11/11/2019] [Accepted: 11/25/2019] [Indexed: 12/16/2022]
Abstract
PURPOSE To report a planned analysis of the efficacy and toxicity of dose escalation to the intraprostatic dominant nodule identified on multiparametric magnetic resonance imaging using standard and hypofractionated external beam radiation therapy. METHODS AND MATERIALS DELINEATE is a single centre prospective phase 2 multicohort study including standard (cohort A: 74 Gy in 37 fractions) and moderately hypofractionated (cohort B: 60 Gy in 20 fractions) prostate image guided intensity modulated radiation therapy in patients with National Comprehensive Cancer Network intermediate- and high-risk disease. Patients received an integrated boost of 82 Gy (cohort A) and 67 Gy (cohort B) to lesions visible on multiparametric magnetic resonance imaging. Fifty-five patients were treated in cohort A, and 158 patients were treated in cohort B; the first 50 sequentially treated patients in cohort B were included in this planned analysis. The primary endpoint was late Radiation Therapy Oncology Group rectal toxicity at 1 year. Secondary endpoints included acute and late toxicity measured with clinician- and patient-reported outcomes at other time points and biochemical relapse-free survival for cohort A. Median follow-up was 74.5 months for cohort A and 52.0 months for cohort B. RESULTS In cohorts A and B, 27% and 40% of patients, respectively, were classified as having National Comprehensive Cancer Network high-risk disease. The cumulative 1-year incidence of Radiation Therapy Oncology Group grade 2 or worse rectal and urinary toxicity was 3.6% and 0% in cohort A and 8% and 10% in cohort B, respectively. There was no reported late grade 3 rectal toxicity in either cohort. Within cohort A, 4 of 55 (7%) patients had biochemical relapse. CONCLUSIONS Delivery of a simultaneous integrated boost to intraprostatic dominant nodules is feasible in prostate radiation therapy using standard and moderately hypofractionated regimens, with rectal and genitourinary toxicity comparable to contemporary series without an intraprostatic boost.
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Affiliation(s)
- Julia R Murray
- The Royal Marsden NHS Foundation Trust, London, United Kingdom; The Institute of Cancer Research, London, United Kingdom.
| | - Alison C Tree
- The Royal Marsden NHS Foundation Trust, London, United Kingdom; The Institute of Cancer Research, London, United Kingdom
| | | | - Aslam Sohaib
- The Royal Marsden NHS Foundation Trust, London, United Kingdom
| | - Steve Hazell
- The Royal Marsden NHS Foundation Trust, London, United Kingdom
| | - Karen Thomas
- The Royal Marsden NHS Foundation Trust, London, United Kingdom
| | - Ranga Gunapala
- The Royal Marsden NHS Foundation Trust, London, United Kingdom
| | - Chris C Parker
- The Royal Marsden NHS Foundation Trust, London, United Kingdom; The Institute of Cancer Research, London, United Kingdom
| | - Robert A Huddart
- The Royal Marsden NHS Foundation Trust, London, United Kingdom; The Institute of Cancer Research, London, United Kingdom
| | - Annie Gao
- The Royal Marsden NHS Foundation Trust, London, United Kingdom; The Institute of Cancer Research, London, United Kingdom
| | - Lesley Truelove
- The Royal Marsden NHS Foundation Trust, London, United Kingdom; The Institute of Cancer Research, London, United Kingdom
| | - Helen A McNair
- The Royal Marsden NHS Foundation Trust, London, United Kingdom; The Institute of Cancer Research, London, United Kingdom
| | - Irena Blasiak-Wal
- The Royal Marsden NHS Foundation Trust, London, United Kingdom; The Institute of Cancer Research, London, United Kingdom
| | - Nandita M deSouza
- The Royal Marsden NHS Foundation Trust, London, United Kingdom; The Institute of Cancer Research, London, United Kingdom
| | - David Dearnaley
- The Royal Marsden NHS Foundation Trust, London, United Kingdom; The Institute of Cancer Research, London, United Kingdom
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35
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Current use of stereotactic body radiation therapy for low and intermediate risk prostate cancer: A National Cancer Database Analysis. Prostate Cancer Prostatic Dis 2019; 23:349-355. [DOI: 10.1038/s41391-019-0191-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Revised: 11/07/2019] [Accepted: 11/14/2019] [Indexed: 02/02/2023]
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36
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Two versus five stereotactic ablative radiotherapy treatments for localized prostate cancer: A quality of life analysis of two prospective clinical trials. Radiother Oncol 2019; 140:105-109. [PMID: 31265940 DOI: 10.1016/j.radonc.2019.06.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 06/11/2019] [Accepted: 06/12/2019] [Indexed: 11/20/2022]
Abstract
PURPOSE Stereotactic ablative radiotherapy (SABR) is appealing for prostate cancer (PCa) due to low α/β, and increasing the dose per fraction could improve the therapeutic index and lead to a better quality of life (QOL). Here we report the outcomes of a QOL comparison between two phase II clinical trials: two vs. five fraction prostate SABR. METHODS Patients had low or intermediate risk PCa. The doses prescribed were 26 Gy/2 and 40 Gy/5. Expanded prostate cancer index composite was collected. Urinary, bowel and sexual domains were analyzed. Minimal clinically important change (MCIC) was defined as >0.5 standard deviation. RESULTS 30 and 152 patients were treated with 2-fraction and 5-fraction SABR. Median follow-up was 55 and 62 months. Five-year biochemical failure rate was 3.3% and 4.6%. The 2-fraction cohort had a significantly better mean QOL over time in the bowel domain (p = 0.0004), without a significant difference in the urinary or sexual domains. The 2-fraction cohort had a significantly lower rate of bowel MCIC (17.8% vs 42.3%, p = 0.01), but there was no difference in urinary (24.1% vs 35.7%) or sexual (15.3% vs 29.2%) MCIC. For MCIC x2 (moderate QOL change), the 2-fraction trial had significantly lower MCIC rates in both the bowel (7.1% vs 24%, p = 0.04) and sexual (0 vs 17.6%, p = 0.01) domains. CONCLUSIONS 2-Fraction SABR is feasible to deliver and well tolerated, with significant signals of improved bowel and sexual QOL. A randomized trial of two vs. five fractions for prostate SABR is needed to confirm the promising findings of this study.
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