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Palanivel C, Madduri LSV, Hein AL, Jenkins CB, Graff BT, Camero AL, Zhou S, Enke CA, Ouellette MM, Yan Y. PR55α-controlled protein phosphatase 2A inhibits p16 expression and blocks cellular senescence induction by γ-irradiation. Aging (Albany NY) 2024; 16:4116-4137. [PMID: 38441530 PMCID: PMC10968692 DOI: 10.18632/aging.205619] [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: 10/24/2023] [Accepted: 02/07/2024] [Indexed: 03/22/2024]
Abstract
Cellular senescence is a permanent cell cycle arrest that can be triggered by both internal and external genotoxic stressors, such as telomere dysfunction and DNA damage. The execution of senescence is mainly by two pathways, p16/RB and p53/p21, which lead to CDK4/6 inhibition and RB activation to block cell cycle progression. While the regulation of p53/p21 signaling in response to DNA damage and other insults is well-defined, the regulation of the p16/RB pathway in response to various stressors remains poorly understood. Here, we report a novel function of PR55α, a regulatory subunit of PP2A Ser/Thr phosphatase, as a potent inhibitor of p16 expression and senescence induction by ionizing radiation (IR), such as γ-rays. The results show that ectopic PR55α expression in normal pancreatic cells inhibits p16 transcription, increases RB phosphorylation, and blocks IR-induced senescence. Conversely, PR55α-knockdown by shRNA in pancreatic cancer cells elevates p16 transcription, reduces RB phosphorylation, and triggers senescence induction after IR. Furthermore, this PR55α function in the regulation of p16 and senescence is p53-independent because it was unaffected by the mutational status of p53. Moreover, PR55α only affects p16 expression but not p14 (ARF) expression, which is also transcribed from the same CDKN2A locus but from an alternative promoter. In normal human tissues, levels of p16 and PR55α proteins were inversely correlated and mutually exclusive. Collectively, these results describe a novel function of PR55α/PP2A in blocking p16/RB signaling and IR-induced cellular senescence.
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Affiliation(s)
- Chitra Palanivel
- Department of Radiation Oncology, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Lepakshe S. V. Madduri
- Department of Radiation Oncology, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Ashley L. Hein
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Christopher B. Jenkins
- Department of Radiation Oncology, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Brendan T. Graff
- Department of Radiation Oncology, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Alison L. Camero
- Department of Radiation Oncology, University of Nebraska Medical Center, Omaha, NE 68198, USA
- Department of Genetics, Cell Biology, and Anatomy, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Sumin Zhou
- Department of Radiation Oncology, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Charles A. Enke
- Department of Radiation Oncology, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Michel M. Ouellette
- Department of Internal Medicine - Gastroenterology and Hepatology, University of Nebraska Medical Center, Omaha, NE 68198, USA
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Ying Yan
- Department of Radiation Oncology, University of Nebraska Medical Center, Omaha, NE 68198, USA
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198, USA
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Yu H, Wang C, Wu L, Zhou Z, Wang Y, Li W, Yuan H, Lu Z, Yan D, Chen S, Wang X, Yan S. A novel hydrogel orthotopic injection model in moderately hypofractionated radiation therapy for prostate cancer: Adaptive degradation and durable imaging. Front Oncol 2023; 12:1077900. [PMID: 36713508 PMCID: PMC9880553 DOI: 10.3389/fonc.2022.1077900] [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: 10/23/2022] [Accepted: 12/29/2022] [Indexed: 01/15/2023] Open
Abstract
Purpose Moderately hypofractionated radiotherapy (MHRT) holds an important position in prostate cancer management. Existing hydrogel spacers can protect the rectum from radiation damage, but need improvement. We explored the application of a novel hydrogel in MHRT with adaptive degradation and durable imaging functions. Methods and materials The hydrogels were irradiated with 6MV x-ray to detect the radio-resistance property. Male SD rats (n=45) underwent hydrogel injection between the prostate and rectum. CT was used for investigating the novel spacer's degradation and imaging functions over three months. The hydrogel's radiation-attenuation properties and biocompatibility were further assessed. Results Hydrogel weight and volume remained stable for six weeks post-injection. After MHRT ended, the hydrogel showed accelerated degradation characteristics and remained in the body for at most three months. CT values of hydrogels exceeded 300 Hounsfield units (HU) throughout treatment, significantly higher than in surrounding normal tissues. A significant dose drop behind the hydrogel was observed post-implantation. Biocompatibility tests of hydrogel found it safe enough for living organisms. Conclusions The novel hydrogel application was fully adaptable to prostate cancer MHRT modalities, largely stable during treatment, rapidly degraded after radiotherapy ended, and consistently maintained superior imaging performance and biocompatibility. This novel spacer will be an effective tool in the era of hypofractionated radiotherapy.
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Affiliation(s)
- Hao Yu
- Department of Radiation Oncology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Cheng Wang
- College of Materials Science & Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang, China
| | - Lingyun Wu
- Department of Radiation Oncology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Ziyang Zhou
- Department of Radiation Oncology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Yiqi Wang
- Department of Radiation Oncology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Wenxiang Li
- Department of Radiation Oncology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Huili Yuan
- College of Materials Science & Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang, China
| | - Zeyi Lu
- Department of Urology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Danfang Yan
- Department of Radiation Oncology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Si Chen
- College of Materials Science & Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang, China,*Correspondence: Senxiang Yan, ; Xu Wang, ; Si Chen,
| | - Xu Wang
- College of Materials Science & Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang, China,*Correspondence: Senxiang Yan, ; Xu Wang, ; Si Chen,
| | - Senxiang Yan
- Department of Radiation Oncology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China,*Correspondence: Senxiang Yan, ; Xu Wang, ; Si Chen,
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Acute side effects after definitive stereotactic body radiation therapy (SBRT) for patients with clinically localized or locally advanced prostate cancer: a single institution prospective study. Radiol Oncol 2021; 55:474-481. [PMID: 34253001 PMCID: PMC8647800 DOI: 10.2478/raon-2021-0031] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Accepted: 05/30/2021] [Indexed: 12/24/2022] Open
Abstract
Background The aim of the study was to evaluate acute side effects after extremely hypofractionated intensity-modulated radiotherapy (IMRT) with stereotactic body radiation therapy (SBRT) for definitive treatment of prostate cancer patients. Patients and methods Between February 2018 and August 2019, 205 low-, intermediate- and high-risk prostate cancer patients were treated with SBRT using “CyberKnife M6” linear accelerator. In low-risk patients 7.5–8 Gy was delivered to the prostate gland by each fraction. For intermediate- and high-risk disease a dose of 7.5–8 Gy was delivered to the prostate and 6–6.5 Gy to the seminal vesicles by each fraction with a simultaneous integrated boost (SIB) technique. A total of 5 fractions (total dose 37.5–40 Gy) were given on every second working day. Acute radiotherapy-related genitourinary (GU) and gastrointestinal (GI) side effects were assessed using Radiation Therapy Oncology Group (RTOG) scoring system. Results Of the 205 patients (28 low-, 115 intermediate-, 62 high-risk) treated with SBRT, 203 (99%) completed the radiotherapy as planned. The duration of radiation therapy was 1 week and 3 days. The frequencies of acute radiotherapy-related side effects were as follows: GU grade 0 – 17.1%, grade I – 30.7%, grade II – 50.7%, grade III – 1.5%; and GI grade 0 – 62.4%, grade I–31.7%, grade II–5.9%, grade III–0%. None of the patients developed grade ≥ 4 acute toxicity. Conclusions SBRT with a total dose of 37.5–40 Gy in 5 fractions appears to be a safe and well tolerated treatment option in patients with prostate cancer, associated with slight or moderate early side effects. Longer follow-up is needed to evaluate long-term toxicity and biochemical control.
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Palhares DMF, Pimentel LCF, Castilho MS, Costa ABD, Reisner ML, Kuhnen FQ, Pássaro A, Leite ETT, Faustino FDLC, Obst FM, Costa FNBBF, Pioner GT, Carvalho ÍTD, Silva JLFD, Morikawa LKK, Zanuncio PHDR, Hanriot RDM, Rosa AA. Hypofractionated radiotherapy recommendations for localized prostate cancer in Brasil. ACTA ACUST UNITED AC 2021; 67:7-18. [PMID: 34161478 DOI: 10.1590/1806-9282.67.01.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 01/06/2021] [Indexed: 11/22/2022]
Abstract
OBJECTIVE Several prospective randomized trials have shown that hypofractionation has the same efficacy and safety as the conventional fractionation in the treatment of localized prostate cancer. There are many benefits of hypofractionation, including a more convenient schedule for the patients and better use of resources, which is especially important in low- and middle-income countries like Brasil. Based on these data, the Brazilian Society of Radiotherapy (Sociedade Brasileira de Radioterapia) organized this consensus to guide and support the use of hypofractionated radiotherapy for localized prostate cancer in Brasil. METHODS The relevant literature regarding moderate hypofractionation (mHypo) and ultra-hypofractionation (uHypo) was reviewed and discussed by a group of experts from public and private centers of different parts of Brasil. Several key questions concerning clinical indications, outcomes and technological requirements for hypofractionation were discussed and voted. For each question, consensus was reached if there was an agreement of at least 75% of the panel members. RESULTS The recommendations are described in this article. CONCLUSION This initiative will assist Brazilian radiation oncologists and medical physicists to safely treat localized prostate cancer patients with hypofractionation.
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Affiliation(s)
| | | | | | | | | | | | | | - Elton Trigo Teixeira Leite
- Universidade de São Paulo, Hospital Vila Nova Star, Rede D'Or, Instituto do Câncer do Estado de São Paulo - São Paulo (SP), Brasil
| | | | - Fernando Mariano Obst
- Grupo Oncoclínicas, Hospital São Lucas Pontifícia Universidade Católica do Rio Grande do Sul - Porto Alegre (RS), Brasil
| | | | | | | | | | | | | | | | - Arthur Accioly Rosa
- Sociedade Brasileira de Radioterapia, Grupo Oncoclínicas - São Paulo (SP), Brasil
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Greco C, Stroom J, Vieira S, Mateus D, Cardoso MJ, Soares A, Pares O, Pimentel N, Louro V, Nunes B, Kociolek J, Fuks Z. Reproducibility and accuracy of a target motion mitigation technique for dose-escalated prostate stereotactic body radiotherapy. Radiother Oncol 2021; 160:240-249. [PMID: 33992627 DOI: 10.1016/j.radonc.2021.05.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 05/03/2021] [Accepted: 05/05/2021] [Indexed: 11/17/2022]
Abstract
BACKGROUND AND PURPOSE To quantitate the accuracy, reproducibility and prostate motion mitigation efficacy rendered by a target immobilization method used in an intermediate-risk prostate cancer dose-escalated 5×9Gy SBRT study. MATERIAL AND METHODS An air-inflated (150 cm3) endorectal balloon and Foley catheter with three electromagnetic beacon transponders (EBT) were used to mitigate and track intra-fractional target motion. A 2 mm margin was used for PTV expansion, reduced to 0 mm at the interface with critical OARs. EBT-detected ≥ 2 mm/5 s motions mandated treatment interruption and target realignment prior to completion of planned dose delivery. Geometrical uncertainties were measured with an in-house ESAPI script. RESULTS Quantitative data were obtained in 886 sessions from 189 patients. Mean PTV dose was 45.8 ± 0.4 Gy (D95 = 40.5 ± 0.4 Gy). A mean of 3.7 ± 1.7 CBCTs were acquired to reach reference position. Mean treatment time was 19.5 ± 12 min, 14.1 ± 11 and 5.4 ± 5.9 min for preparation and treatment delivery, respectively. Target motion of 0, 1-2 and >2 mm/10 min were observed in 59%, 30% and 11% of sessions, respectively. Temporary beam-on hold occurred in 7.4% of sessions, while in 6% a new reference CBCT was required to correct deviations. Hence, all sessions were completed with application of the planned dose. Treatment preparation time > 15 min was significantly associated with the need of a second reference CBCT. Overall systematic and random geometrical errors were in the order of 1 mm. CONCLUSION The prostate immobilization technique explored here affords excellent accuracy and reproducibility, enabling normal tissue dose sculpting with tight PTV margins.
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Affiliation(s)
- Carlo Greco
- The Champalimaud Centre for the Unknown, Lisbon, Portugal.
| | - Joep Stroom
- The Champalimaud Centre for the Unknown, Lisbon, Portugal
| | - Sandra Vieira
- The Champalimaud Centre for the Unknown, Lisbon, Portugal
| | - Dalila Mateus
- The Champalimaud Centre for the Unknown, Lisbon, Portugal
| | | | - Ana Soares
- The Champalimaud Centre for the Unknown, Lisbon, Portugal
| | - Oriol Pares
- The Champalimaud Centre for the Unknown, Lisbon, Portugal
| | - Nuno Pimentel
- The Champalimaud Centre for the Unknown, Lisbon, Portugal
| | - Vasco Louro
- The Champalimaud Centre for the Unknown, Lisbon, Portugal
| | - Beatriz Nunes
- The Champalimaud Centre for the Unknown, Lisbon, Portugal
| | | | - Zvi Fuks
- The Champalimaud Centre for the Unknown, Lisbon, Portugal; Memorial Sloan Kettering Cancer Center, New York, USA
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Greco C, Pares O, Pimentel N, Louro V, Santiago I, Vieira S, Stroom J, Mateus D, Soares A, Marques J, Freitas E, Coelho G, Seixas M, Lopez-Beltran A, Fuks Z. Safety and Efficacy of Virtual Prostatectomy With Single-Dose Radiotherapy in Patients With Intermediate-Risk Prostate Cancer: Results From the PROSINT Phase 2 Randomized Clinical Trial. JAMA Oncol 2021; 7:700-708. [PMID: 33704378 DOI: 10.1001/jamaoncol.2021.0039] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Importance Ultra-high single-dose radiotherapy (SDRT) represents a potential alternative to curative extreme hypofractionated stereotactic body radiotherapy (SBRT) in organ-confined prostate cancer. Objective To compare toxic effect profiles, prostate-specific antigen (PSA) responses, and quality-of-life end points of SDRT vs extreme hypofractionated SBRT. Design, Setting, and Participants The PROSINT single-institution phase 2 randomized clinical trial accrued, between September 2015 and January 2017, 30 participants with intermediate-risk prostate cancer to receive SDRT or extreme hypofractionated SBRT. Androgen deprivation therapy was not permitted. Data were analyzed from March to May 2020. Interventions Patients were randomized in a 1:1 ratio to receive 5 × 9 Gy SBRT (control arm) or 24 Gy SDRT (test arm). Main Outcomes and Measures The primary end point was toxic effects; the secondary end points were PSA response, PSA relapse-free survival, and patient-reported quality of life measured with the International Prostate Symptom Score (IPSS) and Expanded Prostate Cancer Index Composite (EPIC)-26 questionnaires. Results A total of 30 men were randomized; median (interquartile range) age was 66.3 (61.2-69.9) and 73.6 (64.7-75.9) years for the SBRT and SDRT arms, respectively. Time to appearance and duration of acute and late toxic effects were similar in the 2 trial arms. Cumulative late actuarial urinary toxic effects did not differ for grade 1 (hazard ratio [HR], 0.41; 90% CI, 0.13-1.27) and grade 2 or greater (HR, 1.07; 90% CI, 0.21-5.57). Actuarial grade 1 late gastrointestinal (GI) toxic effects were comparable (HR, 0.37; 90% CI, 0.07-1.94) and there were no grade 2 or greater late GI toxic effects. Declines in PSA level to less than 0.5 ng/mL occurred by 36 months in both study arms. No PSA relapses occurred in favorable intermediate-risk disease, while in the unfavorable category, the actuarial 4-year PSA relapse-free survival values were 75.0% vs 64.0% (HR, 0.76; 90% CI, 0.17-3.31) for SBRT vs SDRT, respectively. The EPIC-26 median summary scores for the genitourinary and GI domains dropped transiently at 1 month and returned to pretreatment scores by 3 months in both arms. The IPSS-derived transient late urinary flare symptoms occurred at 9 to 18 months in 20% (90% CI, 3%-37%) of patients receiving SDRT. Conclusions and Relevance In this randomized clinical trial among patients with intermediate-risk prostate cancer, SDRT was safe and associated with low toxicity, and the tumor control and quality-of-life end points closely match the SBRT arm outcomes. Further studies are encouraged to explore indications for SDRT in the cure of prostate cancer. Trial Registration ClinicalTrials.gov Identifier: NCT02570919.
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Affiliation(s)
- Carlo Greco
- The Champalimaud Centre for the Unknown, Lisbon, Portugal
| | - Oriol Pares
- The Champalimaud Centre for the Unknown, Lisbon, Portugal
| | - Nuno Pimentel
- The Champalimaud Centre for the Unknown, Lisbon, Portugal
| | - Vasco Louro
- The Champalimaud Centre for the Unknown, Lisbon, Portugal
| | - Inês Santiago
- The Champalimaud Centre for the Unknown, Lisbon, Portugal
| | - Sandra Vieira
- The Champalimaud Centre for the Unknown, Lisbon, Portugal
| | - Joep Stroom
- The Champalimaud Centre for the Unknown, Lisbon, Portugal
| | - Dalila Mateus
- The Champalimaud Centre for the Unknown, Lisbon, Portugal
| | - Ana Soares
- The Champalimaud Centre for the Unknown, Lisbon, Portugal
| | - João Marques
- The Champalimaud Centre for the Unknown, Lisbon, Portugal
| | - Elda Freitas
- The Champalimaud Centre for the Unknown, Lisbon, Portugal
| | - Graça Coelho
- The Champalimaud Centre for the Unknown, Lisbon, Portugal
| | - Manuela Seixas
- The Champalimaud Centre for the Unknown, Lisbon, Portugal
| | | | - Zvi Fuks
- The Champalimaud Centre for the Unknown, Lisbon, Portugal.,Memorial Sloan Kettering Cancer Center, New York, New York
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Investigating the Benefit of Combined Androgen Modulation and Hypofractionation in Prostate Cancer. Int J Mol Sci 2020; 21:ijms21228447. [PMID: 33182844 PMCID: PMC7698244 DOI: 10.3390/ijms21228447] [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: 09/09/2020] [Revised: 11/03/2020] [Accepted: 11/07/2020] [Indexed: 12/24/2022] Open
Abstract
Hypofractionation is currently considered a valid alternative to conventional radiotherapy for the treatment of patients with organ-confined prostate cancer. Recent data have demonstrated that extreme hypofractionation, which involves the use of a high radiation dose per delivered fraction and concomitant reduction of sessions, is a safe and effective treatment, even though its radiobiological rationale is still lacking. The present work aims to investigate the biological basis sustaining this approach and to evaluate the potential of a hypofractionated regimen in combination with androgen deprivation therapy, one of the major standards of care for prostate cancer. Findings show that androgen receptor (AR) modulation, by use of androgens and antiandrogens, has a significant impact on cell survival, especially in hypoxic conditions (4% O2). Subsequent experiments have revealed that AR activity as a transcription factor is involved in the onset of malignant senescence-associated secretory phenotype (SASP) and activation of DNA repair cascade. In particular, we found that AR stimulation in hypoxic conditions promotes the enhanced transcription of ATM gene, the cornerstone kinase of the DNA damage repair genes. Together, these data provide new potential insights to justify the use of androgen deprivation therapy, in particular with second-generation anti-androgens such as enzalutamide, in combination with radiotherapy.
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Greco C, Pares O, Pimentel N, Louro V, Morales J, Nunes B, Vasconcelos AL, Antunes I, Kociolek J, Stroom J, Viera S, Mateus D, Cardoso MJ, Soares A, Marques J, Freitas E, Coelho G, Fuks Z. Target motion mitigation promotes high-precision treatment planning and delivery of extreme hypofractionated prostate cancer radiotherapy: Results from a phase II study. Radiother Oncol 2020; 146:21-28. [DOI: 10.1016/j.radonc.2020.01.029] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2019] [Revised: 01/26/2020] [Accepted: 01/30/2020] [Indexed: 01/06/2023]
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Devlin L, Dodds D, Sadozye A, McLoone P, MacLeod N, Lamb C, Currie S, Thomson S, Duffton A. Dosimetric impact of organ at risk daily variation during prostate stereotactic ablative radiotherapy. Br J Radiol 2020; 93:20190789. [PMID: 31971829 PMCID: PMC7362910 DOI: 10.1259/bjr.20190789] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 12/19/2019] [Accepted: 01/13/2020] [Indexed: 12/25/2022] Open
Abstract
OBJECTIVE Prostate stereotactic ablative radiotherapy (SABR) delivers large doses using a fast dose rate. This amplifies the effect geometric uncertainties have on normal tissue dose. The aim of this study was to determine whether the treatment dose-volume histogram (DVH) agrees with the planned dose to organs at risk (OAR). METHODS 41 low-intermediate risk prostate cancer patients were treated with SABR using a linac based technique. Dose prescribed was 35 Gy in five fractions delivered on alternate days, planned using volumetric modulated arc therapy (VMAT) with 10X flattening filter free (FFF). On treatment, prostate was matched to fiducial markers on cone beam CT (CBCT). OAR were retrospectively delineated on 205 pre-treatment CBCT images. Daily CBCT contours were overlaid on the planning CT for dosimetric analysis. Verification plan used to evaluate the daily DVH for each structure. The daily doses received by OAR were recorded using the D%. RESULTS The median rectum and bladder volumes at planning were 67.1 cm3 (interquartile range 56.4-78.2) and 164.4 cm3 (interquartile range 120.3-213.4) respectively. There was no statistically significant difference in median rectal volume at each of the five treatment scans compared to the planning scan (p = 0.99). This was also the case for median bladder volume (p = 0.79). The median dose received by rectum and bladder at each fraction was higher than planned, at the majority of dose levels. For rectum the increase ranged from 0.78-1.64Gy and for bladder 0.14-1.07Gy. The percentage of patients failing for rectum D35% < 18 Gy (p = 0.016), D10% < 28 Gy (p = 0.004), D5% < 32 Gy (p = 0.0001), D1% < 35 Gy (p = 0.0001) and bladder D1% < 35 Gy (p = 0.001) at treatment were all statistically significant. CONCLUSION In this cohort of prostate SABR patients, we estimate the OAR treatment DVH was higher than planned. This was due to rectal and bladder organ variation. ADVANCES IN KNOWLEDGE OAR variation in prostate SABR using a FFF technique, may cause the treatment DVH to be higher than planned.
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Affiliation(s)
- Lynsey Devlin
- Department of Clinical Oncology, Beatson West of Scotland Cancer Centre, Glasgow, United Kingdom
| | - David Dodds
- Department of Clinical Oncology, Beatson West of Scotland Cancer Centre, Glasgow, United Kingdom
| | - Azmat Sadozye
- Department of Clinical Oncology, Beatson West of Scotland Cancer Centre, Glasgow, United Kingdom
| | - Philip McLoone
- Institute of Health & Wellbeing, University of Glasgow, Glasgow, United Kingdom
| | - Nicholas MacLeod
- Department of Clinical Oncology, Beatson West of Scotland Cancer Centre, Glasgow, United Kingdom
| | - Carolynn Lamb
- Department of Clinical Oncology, Beatson West of Scotland Cancer Centre, Glasgow, United Kingdom
| | - Suzanne Currie
- Department of Clinical Physics and Bioengineering, Beatson West of Scotland Cancer Centre, Glasgow, United Kingdom
| | - Stefanie Thomson
- Department of Clinical Physics and Bioengineering, Beatson West of Scotland Cancer Centre, Glasgow, United Kingdom
| | - Aileen Duffton
- Department of Clinical Oncology, Beatson West of Scotland Cancer Centre, Glasgow, United Kingdom
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Moderate hypofractionation and stereotactic body radiation therapy in the treatment of prostate cancer. Urol Oncol 2019; 37:619-627. [DOI: 10.1016/j.urolonc.2019.01.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Revised: 01/02/2019] [Accepted: 01/13/2019] [Indexed: 01/03/2023]
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11
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New approaches for effective and safe pelvic radiotherapy in high-risk prostate cancer. Nat Rev Urol 2019; 16:523-538. [DOI: 10.1038/s41585-019-0213-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/26/2019] [Indexed: 02/07/2023]
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Lymphocyte Count Kinetics, Factors Associated with the End-of-Radiation-Therapy Lymphocyte Count, and Risk of Infection in Patients with Solid Malignant Tumors Treated with Curative-Intent Radiation Therapy. Int J Radiat Oncol Biol Phys 2019; 105:812-823. [PMID: 31344435 DOI: 10.1016/j.ijrobp.2019.07.013] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 06/12/2019] [Accepted: 07/12/2019] [Indexed: 12/14/2022]
Abstract
PURPOSE Lymphopenia has been associated with poor outcomes in patients with cancer. We sought to describe the lymphocyte kinetics in patients who received radiation therapy; to identify factors associated with the end-of-radiation-therapy (EoRT) lymphocyte count; and to determine the association of radiation therapy-induced lymphopenia with subsequent infection. METHODS AND MATERIALS Patients with solid malignant tumors treated at the Department of Oncology at Rigshospitalet, University of Copenhagen, Denmark, were included if they had received their first external beam radiation therapy with curative intent from January 2005 to December 2016 and had pretreatment and EoRT lymphocyte counts measured. Factors associated with the EoRT lymphocyte count were identified using regression analyses. The risk of subsequent infection was estimated using Cox proportional hazards regression. RESULTS We included 3920 patients. More patients had lymphopenia (<1000 cells/μL) at EoRT than at pretreatment (67.1% vs 14.9%; P < .001). Patients who received schemes with higher intensities (equivalent dose in 2-Gy fractions [EQD2] >65 Gy) in shorter time (<25 days) had a higher predicted EoRT lymphocyte count than patients who received schemes delivering EQD2 of 50 to 65 Gy in 25 to 45 days (1439 cells/μL, 95% confidence interval [1293-1585] vs 784 [754-814]). Radiation to multiple sites and concomitant chemotherapy use, particularly platinum compounds versus none, were associated with a lower EoRT lymphocyte count (698 [655-742] vs 852 [833-870]; and 612 [565-659] vs 937 [909-964], respectively). Patients with EoRT lymphopenia grade ≥3 (<500 cells/μL) had a higher risk of infection in the 3 months after radiation therapy (hazard ratio, 2.15 [95% confidence interval, 1.53-3.02]; P < .001), compared with patients with an EoRT lymphocyte count >1000 cells/μL. CONCLUSIONS The lymphocyte count declined during radiation therapy. Short duration schemes (<25 days), despite high total radiation dose (EQD2 >65 Gy), were associated with a higher EoRT lymphocyte count, whereas radiation to multiple sites and concomitant chemotherapy were associated with a lower count. EoRT lymphopenia was associated with an increased risk of infection.
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13
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Greco C, Vazirani AA, Pares O, Pimentel N, Louro V, Morales J, Nunes B, Vasconcelos AL, Antunes I, Kociolek J, Fuks Z. The evolving role of external beam radiotherapy in localized prostate cancer. Semin Oncol 2019; 46:246-253. [DOI: 10.1053/j.seminoncol.2019.08.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Accepted: 08/07/2019] [Indexed: 12/30/2022]
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14
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Dess RT, Soni PD, Jackson WC, Berlin A, Cox BW, Jolly S, Efstathiou JA, Feng FY, Kishan AU, Stish BJ, Pisansky TM, Spratt DE. The current state of randomized clinical trial evidence for prostate brachytherapy. Urol Oncol 2019; 37:599-610. [PMID: 31060795 DOI: 10.1016/j.urolonc.2019.04.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 03/26/2019] [Accepted: 04/09/2019] [Indexed: 02/06/2023]
Abstract
Interstitial brachytherapy is one of several curative therapeutic options for the treatment of localized prostate cancer. In this review, we summarize all available randomized data to support the optimal use of prostate brachytherapy. Evidence from completed randomized controlled trials is the focus of this review with a presentation also of important ongoing trials. Gaps in knowledge are identified where future investigation may be fruitful with intent to inspire well-designed prospective studies with standardized treatment that focuses on improving oncological outcomes, reducing morbidity, or maintaining quality of life.
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Affiliation(s)
- Robert T Dess
- Department of Radiation Oncology, University of Michigan, Ann Arbor, MI.
| | - Payal D Soni
- Department of Radiation Oncology, Hunter Holmes McGuire VA Medical Center, Richmond, VA
| | - William C Jackson
- Department of Radiation Oncology, University of Michigan, Ann Arbor, MI
| | - Alejandro Berlin
- Department of Radiation Oncology, University of Toronto, Toronto, Canada
| | - Brett W Cox
- Department of Radiation Medicine, Northwell Health, Hofstra Northwell School of Medicine, Hempstead, NY
| | - Shruti Jolly
- Department of Radiation Oncology, University of Michigan, Ann Arbor, MI
| | - Jason A Efstathiou
- Department of Radiation Oncology, Massachusetts General Hospital, Boston, MA
| | - Felix Y Feng
- Departments of Radiation Oncology, Urology and Medicine, University of California San Francisco, San Francisco, CA
| | - Amar U Kishan
- Department of Radiation Oncology, University of California Los Angeles, Los Angeles, CA
| | - Bradley J Stish
- Department of Radiation Oncology, Mayo Clinic, Rochester, MN
| | | | - Daniel E Spratt
- Department of Radiation Oncology, University of Michigan, Ann Arbor, MI
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15
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Jereczek-Fossa BA, Maucieri A, Marvaso G, Gandini S, Fodor C, Zerini D, Riva G, Alessandro O, Surgo A, Volpe S, Fanetti G, Arculeo S, Zerella MA, Parisi S, Maisonneuve P, Vavassori A, Cattani F, Cambria R, Garibaldi C, Starzyńska A, Musi G, De Cobelli O, Ferro M, Nolè F, Ciardo D, Orecchia R. Impact of image guidance on toxicity and tumour outcome in moderately hypofractionated external-beam radiotherapy for prostate cancer. Med Oncol 2018; 36:9. [PMID: 30483899 DOI: 10.1007/s12032-018-1233-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Accepted: 11/22/2018] [Indexed: 02/07/2023]
Abstract
To report toxicity and efficacy outcome of moderately hypofractionated image-guided external-beam radiotherapy in a large series of patients treated for prostate cancer (PCa). Between 10/2006 and 12/2015, 572 T1-T3N0M0 PCa patients received 70.2 Gy in 26 fractions at 2.7 Gy/fraction: 344 patients (60%) with three-dimensional conformal radiotherapy (3D-CRT) and 228 (40%) with intensity-modulated radiotherapy (IMRT). Radiation Therapy Oncology Group/European Organization for Research and Treatment of Cancer criteria and Houston definition (nadir + 2) were used for toxicity and biochemical failure evaluation, respectively. Median age was 74 years (interquartile range 69-77). Compared with 3D-CRT, in IMRT group more high-risk patients (29% vs 18%; P = 0.002) and more high-volume target (75% vs 60%; P < 0.001) were included. Acute gastro-intestinal (GI) toxicity G > 1 were registered in 8% and in 11% IMRT and 3D-CRT patients, respectively, whereas late GI G > 1 were observed in 2% and 16% IMRT and 3D-CRT patients, respectively. Acute genito-urinary (GU) toxicity G > 1 were registered in 26% and 40% IMRT and 3D-CRT patients, respectively, whereas late GU G > 1 occurred in 5% IMRT and 15% 3D-CRT patients. Multivariate proportional hazard Cox models confirmed significantly greater risk of late toxicity with 3D-CRT compared to IMRT for GU > 1 (P = 0.004) and for GI > 1 (P < 0.001). With a median 4-year follow-up, overall survival (OS), clinical progression-free survival (cPFS) and biochemical PFS (bPFS) for the whole series were 91%, 92% and 91%, respectively. cPFS and bPFS were significantly different by risk groups. Multivariate Cox models for bPFS and cPFS showed no difference between irradiation techniques and a significant impact of risk group and initial PSA. Moderately hypofractionated radiotherapy is a viable treatment option for localized PCa with excellent tumour control and satisfactory toxicity profile. IMRT seems associated with a reduction in toxicity, whereas tumour control was equal between IMRT and 3D-CRT patients and depended mainly on the risk category.
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Affiliation(s)
- B A Jereczek-Fossa
- Department of Radiation Oncology, IEO, European Institute of Oncology IRCCS, Milan, Italy.,Department of Oncology and Hemato-Oncology, University of Milan, Milan, Italy
| | - A Maucieri
- Department of Radiation Oncology, IEO, European Institute of Oncology IRCCS, Milan, Italy
| | - G Marvaso
- Department of Radiation Oncology, IEO, European Institute of Oncology IRCCS, Milan, Italy.
| | - S Gandini
- Department of Experimental Oncology, European Institute of Oncology, Via Adamello 16, 20139, Milan, Italy
| | - C Fodor
- Department of Radiation Oncology, IEO, European Institute of Oncology IRCCS, Milan, Italy
| | - D Zerini
- Department of Radiation Oncology, IEO, European Institute of Oncology IRCCS, Milan, Italy
| | - G Riva
- Department of Radiation Oncology, IEO, European Institute of Oncology IRCCS, Milan, Italy.,Department of Oncology and Hemato-Oncology, University of Milan, Milan, Italy
| | - O Alessandro
- Department of Radiation Oncology, IEO, European Institute of Oncology IRCCS, Milan, Italy.,Department of Oncology and Hemato-Oncology, University of Milan, Milan, Italy
| | - A Surgo
- Department of Radiation Oncology, IEO, European Institute of Oncology IRCCS, Milan, Italy
| | - S Volpe
- Department of Radiation Oncology, IEO, European Institute of Oncology IRCCS, Milan, Italy.,Department of Oncology and Hemato-Oncology, University of Milan, Milan, Italy
| | - G Fanetti
- Department of Radiation Oncology, IEO, European Institute of Oncology IRCCS, Milan, Italy
| | - S Arculeo
- Department of Radiation Oncology, IEO, European Institute of Oncology IRCCS, Milan, Italy.,Department of Oncology and Hemato-Oncology, University of Milan, Milan, Italy
| | - M A Zerella
- Department of Radiation Oncology, IEO, European Institute of Oncology IRCCS, Milan, Italy.,Department of Oncology and Hemato-Oncology, University of Milan, Milan, Italy
| | - S Parisi
- Department of Radiation Oncology, IEO, European Institute of Oncology IRCCS, Milan, Italy
| | - P Maisonneuve
- Division of Epidemiology and Biostatistics, IEO, European Institute of Oncology IRCCS, Milan, Italy
| | - A Vavassori
- Department of Radiation Oncology, IEO, European Institute of Oncology IRCCS, Milan, Italy
| | - F Cattani
- Unit of Medical Physics, IEO, European Institute of Oncology IRCCS, Milan, Italy
| | - R Cambria
- Unit of Medical Physics, IEO, European Institute of Oncology IRCCS, Milan, Italy
| | - C Garibaldi
- Radiation Research Unit, IEO, European Institute of Oncology IRCCS, Milan, Italy
| | - A Starzyńska
- Department of Oral Surgery, Medical University of Gdańsk, Gdańsk, Poland
| | - G Musi
- Department of Urology, IEO, European Institute of Oncology IRCCS, Milan, Italy
| | - O De Cobelli
- Department of Oncology and Hemato-Oncology, University of Milan, Milan, Italy.,Department of Urology, IEO, European Institute of Oncology IRCCS, Milan, Italy
| | - M Ferro
- Department of Urology, IEO, European Institute of Oncology IRCCS, Milan, Italy
| | - F Nolè
- Medical Oncology Division of Urogenital and Head and Neck Tumours, IEO, European Institute of Oncology IRCCS, Milan, Italy
| | - D Ciardo
- Department of Radiation Oncology, IEO, European Institute of Oncology IRCCS, Milan, Italy
| | - R Orecchia
- Scientific Directorate, IEO, European Institute of Oncology IRCCS, Milan, Italy
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16
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Bahtiyar N, Onaran İ, Aydemir B, Baykara O, Toplan S, Agaoglu FY, Akyolcu MC. Monitoring of platelet function parameters and microRNA expression levels in patients with prostate cancer treated with volumetric modulated arc radiotherapy. Oncol Lett 2018; 16:4745-4753. [PMID: 30250541 DOI: 10.3892/ol.2018.9167] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 11/16/2017] [Indexed: 12/24/2022] Open
Abstract
Radiotherapy (RT) may result in platelet activation and thrombosis development. To the best of our knowledge, the potential effect of volumetric-modulated arc therapy (VMAT), a novel radiotherapy technique, on platelet function and microRNA (miRNA/miR) expression has not been previously investigated. The present study aimed to determine the effect of VMAT on the alterations in platelet function parameters and miRNA expression levels. A total of 25 patients with prostate cancer and 25 healthy subjects were included in the present study. Blood samples were collected from the patient group on the day prior to RT (pre-RT), the day RT was completed (post-RT day 0), and 40 days following the end of therapy (post-RT day 40). Platelet count, mean platelet volume (MPV) value, platelet aggregation, plasma P-selectin, thrombospondin-1, platelet factor 4, plasma miR-223 and miR-126 expression levels were measured. A significant decrease in platelet count in the post-RT day 0 group was measured in comparison with the pre-RT and the post-RT day 40 groups. Pre-RT MPV values were higher than those of the post-RT day 0 and the post-RT day 40 groups. No significant differences were observed in the levels of platelet activation markers or miR-223 and miR-126 expression levels between the RT groups. Although RT may result in a reduction in platelet and MPV counts, the results of the present study indicate that platelet activation markers are not affected by VMAT. Therefore, it is possible that no platelet activation occurs during VMAT, owing to the conformal dose distributions, improved target volume coverage and the sparing of normal tissues from undesired radiation.
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Affiliation(s)
- Nurten Bahtiyar
- Department of Biophysics, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul 34098, Turkey
| | - İlhan Onaran
- Department of Medical Biology, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul 34098, Turkey
| | - Birsen Aydemir
- Department of Biophysics, Faculty of Medicine, Sakarya University, Sakarya 54050, Turkey
| | - Onur Baykara
- Department of Medical Biology, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul 34098, Turkey
| | - Selmin Toplan
- Department of Biophysics, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul 34098, Turkey
| | - Fulya Yaman Agaoglu
- Department of Radiation Oncology, Institute of Oncology, Istanbul University, Istanbul 34098, Turkey
| | - Mehmet Can Akyolcu
- Department of Biophysics, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul 34098, Turkey
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17
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Late toxicity of image-guided hypofractionated radiotherapy for prostate: non-randomized comparison with conventional fractionation. Radiol Med 2018; 124:65-78. [PMID: 30219945 DOI: 10.1007/s11547-018-0937-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Accepted: 08/28/2018] [Indexed: 10/28/2022]
Abstract
PURPOSE To evaluate the incidence and predictors for late toxicity and tumor outcome after hypofractionated radiotherapy using three different image-guided radiotherapy (IGRT) systems (hypo-IGRT) compared with conventional fractionation without image guidance (non-IGRT). METHODS AND MATERIALS We compared the late rectal and urinary toxicity and outcome in 179 prostate cancer patients treated with hypo-IGRT (70.2 Gy/26 fractions) and 174 non-IGRT patients (80 Gy/40 fractions). Multivariate analysis was performed to define predictors for late toxicity. 5- and 8-year recurrence-free survival (RFS) and overall survival (OS) were analyzed. RESULTS Mean follow-up was 81 months for hypo-IGRT and 90 months for non-IGRT group. Mainly mild late toxicity was observed: Hypo-IGRT group experienced 65 rectal (30.9% G1/G2; 6.3% G3/G4) and 105 urinary events (56% G1/G2; 4% G3/G4). 5- and 8-year RFS rates were 87.5% and 86.8% (hypo-IGRT) versus 80.4% and 66.8% (non-IGRT). 5- and 8-year OS rates were 91.3% and 82.7% in hypo-IGRT and 92.2% and 84% in non-IGRT group. Multivariate analysis showed that hypo-IGRT is a predictor for late genitourinary toxicity, whereas hypo-IGRT, acute urinary toxicity and androgen deprivation therapy are predictors for late rectal toxicity. Advanced T stage and higher Gleason score (GS) were correlated with worse RFS. CONCLUSIONS A small increase in mild late toxicity, but not statistically significant increase in severe late toxicity in the hypo-IGRT group when compared with conventional non-IGRT group was observed. Our study confirmed that IGRT allows for safe moderate hypofractionation, offering a shorter overall treatment time, a good impact in terms of RFS and providing potentially more economic health care.
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18
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Datta NR, Stutz E, Rogers S, Bodis S. Clinical estimation of α/β values for prostate cancer from isoeffective phase III randomized trials with moderately hypofractionated radiotherapy. Acta Oncol 2018; 57:883-894. [PMID: 29405785 DOI: 10.1080/0284186x.2018.1433874] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
BACKGROUND The α/β values for prostate cancer (PCa) are usually assumed to be low (1.0-1.8 Gy). This study estimated the α/β values of PCa from phase III randomized trials of conventional (CRT) versus hypofractionated (HRT) external beam radiotherapy (RT), reported as isoeffective in terms of their 5-year biochemical (BF) or biochemical and/or clinical failure (BCF) rates. MATERIAL AND METHODS The α/β for each trial was estimated from the equivalent biological effective doses using the linear-quadratic model for each of their HRT and CRT schedules. The cumulative outcomes of these trials were evaluated by meta-analysis for odds ratio (OR), risk ratio (RR) and risk difference (RD). RESULTS Eight trials from seven studies, randomized 6993 patients between CRT (n = 2941) and HRT (n = 4052). RT treatment varied between the two treatment groups in terms of dose/fraction, total dose, overall treatment time and %patients on androgen deprivation therapy (ADT). Differences in OR, RR, and RD for both BF and BCF were nonsignificant. The computed α/β ranged from 1.3 to 11.1 Gy (4.9 ± 3.9 Gy; 95% CI: 1.6-8.2). On multivariate regression, %ADT was the sole determinant of computed α/β (model R2: 0.98, p < .001). CONCLUSIONS Clinically estimated α/β for PCa from isoeffective randomized trials using known variables in the linear-quadratic expression ranged between 1.3 and 11.1 Gy. The estimated α/β values were inversely related to %ADT usage, which should be considered when planning future RT dose-fractionation schedules.
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Affiliation(s)
- Niloy R. Datta
- Center for Radiation Oncology, KSA-KSB, Kantonsspital Aarau, Aarau, Switzerland
| | - Emanuel Stutz
- Center for Radiation Oncology, KSA-KSB, Kantonsspital Aarau, Aarau, Switzerland
| | - Susanne Rogers
- Center for Radiation Oncology, KSA-KSB, Kantonsspital Aarau, Aarau, Switzerland
| | - Stephan Bodis
- Center for Radiation Oncology, KSA-KSB, Kantonsspital Aarau, Aarau, Switzerland
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19
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“Give me five” ultra-hypofractionated radiotherapy for localized prostate cancer: non-invasive ablative approach. Med Oncol 2018; 35:96. [DOI: 10.1007/s12032-018-1155-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 05/03/2018] [Indexed: 01/23/2023]
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20
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De Roover R, Crijns W, Poels K, Peeters R, Draulans C, Haustermans K, Depuydt T. Characterization of a novel liquid fiducial marker for multimodal image guidance in stereotactic body radiotherapy of prostate cancer. Med Phys 2018. [PMID: 29537613 DOI: 10.1002/mp.12860] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
PURPOSE Liquid fiducial markers have shown to be a promising alternative to solid gold markers in terms of imaging artifact reduction, patient comfort, and compatibility with different imaging modalities. This study aims to investigate the performance of the novel BioXmark® liquid marker for state-of-the-art multimodal imaging used in prostate cancer (PCa) radiotherapy, encompassing kV CT/CBCT, multiparametric MRI, and kV x-ray imaging. In addition, automatic detection of the liquid markers in x-ray imaging for prostate motion monitoring during treatment was investigated. METHODS A total of eight BioXmark® liquid markers with varying volumes (range 5-300 μL) were casted on a square grid into a gelatin phantom insert. A cylindrical gold marker (QLRAD, length = 7 mm, Ø = 1 mm) was inserted for reference. Liquid marker visibility and streaking artifacts in CT/CBCT imaging were evaluated by placing the gelatin phantom into a CIRS anthropomorphic phantom. Relevant MRI characteristics such as the T2 and T1 relaxation times, the ADC value, and the relative proton density (ρH) were quantified by placing the gelatin phantom insert next to a T1MES mapping phantom and a water-filled syringe for reference. Ex vivo multiparametric MRI images were acquired by placing the gelatin phantom next to a resected prostate specimen. Anterior-posterior x-ray projection images were obtained by placing the gelatin phantom insert on top of an anthropomorphic pelvic phantom with internal pelvic bony structures and were acquired for five positions relative to the bony anatomy and 24 clinically relevant x-ray exposure settings. To quantify individual automatic marker detection, single markers were artificially isolated in the x-ray images using postprocessing. RESULTS Markers of all sizes were clearly visible on CT and CBCT images with only the largest marker volumes (100-300 μL) displaying artifacts similar in size to the gold fiducial marker. Artifact size increased with increasing liquid marker volume. Liquid markers displayed good contrast in ex vivo T1-weighted and ρH-weighted images. The markers were not visible in the ex vivo T2-weighted image. The liquid markers induced a chemical shift artifact in the obtained ADC-map. Automated detection in x-ray imaging was feasible with high detection success (four of five positions) for marker volumes in the range of 25-200 μL. None of the liquid markers were detected successfully when superimposed on a bony edge, independent of their size. CONCLUSIONS This study is the first to show the compatibility of BioXmark® liquid markers with multimodal image-guided radiotherapy for PCa. Compared to a solid gold marker, they had favorable results in both visibility and induced imaging artifacts. Liquid marker visibility in MRI imaging of the prostate does not solely depend on the low ρH value (not visible on T2-weighted image) but is also influenced by its relaxation times. Automated marker detection in x-ray images was feasible but better adapted marker detection algorithms are necessary for marker localization in the presence of bony edges. Hence, the liquid marker provides a minimally invasive (fine needles) and highly applicable alternative to current solid gold markers for multimodal image-guided prostate radiotherapy treatments.
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Affiliation(s)
- Robin De Roover
- Laboratory of Experimental Radiotherapy, Department of Oncology, KU Leuven - University of Leuven, Herestraat 49, Leuven, B-3000, Belgium
| | - Wouter Crijns
- Department of Radiation Oncology, University Hospitals Leuven, Herestraat 49, Leuven, B-3000, Belgium
| | - Kenneth Poels
- Department of Radiation Oncology, University Hospitals Leuven, Herestraat 49, Leuven, B-3000, Belgium
| | - Ronald Peeters
- Department of Radiology, University Hospitals Leuven, Herestraat 49, Leuven, B-3000, Belgium
| | - Cédric Draulans
- Laboratory of Experimental Radiotherapy, Department of Oncology, KU Leuven - University of Leuven, Herestraat 49, Leuven, B-3000, Belgium.,Department of Radiation Oncology, University Hospitals Leuven, Herestraat 49, Leuven, B-3000, Belgium
| | - Karin Haustermans
- Laboratory of Experimental Radiotherapy, Department of Oncology, KU Leuven - University of Leuven, Herestraat 49, Leuven, B-3000, Belgium.,Department of Radiation Oncology, University Hospitals Leuven, Herestraat 49, Leuven, B-3000, Belgium
| | - Tom Depuydt
- Laboratory of Experimental Radiotherapy, Department of Oncology, KU Leuven - University of Leuven, Herestraat 49, Leuven, B-3000, Belgium.,Department of Radiation Oncology, University Hospitals Leuven, Herestraat 49, Leuven, B-3000, Belgium
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21
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Dong Y, Zaorsky NG, Li T, Churilla TM, Viterbo R, Sobczak ML, Smaldone MC, Chen DY, Uzzo RG, Hallman MA, Horwitz EM. Effects of interruptions of external beam radiation therapy on outcomes in patients with prostate cancer. J Med Imaging Radiat Oncol 2017; 62:116-121. [PMID: 29030906 DOI: 10.1111/1754-9485.12675] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2017] [Accepted: 08/27/2017] [Indexed: 12/25/2022]
Abstract
INTRODUCTION To evaluate if interruptions of external beam radiation therapy impact outcomes in men with localized prostate cancer (PCa). METHODS We included men with localized PCa treated with three-dimensional conformal radiotherapy (3D-CRT) or intensity-modulated radiation therapy (IMRT) of escalated dose (≥74 Gy in 1.8 or 2 Gy fractions) between 1992 and 2013 at an NCI-designated cancer centre. Men receiving androgen deprivation therapy were excluded. The non-treatment day ratio (NTDR) was defined as the number of non-treatment days divided by the total elapsed days of therapy. NTDR was analysed for each National Comprehensive Cancer Network (NCCN) risk group. RESULTS There were 1728 men included (839 low-risk, 776 intermediate-risk and 113 high-risk), with a median follow up of 53.5 months (range 12-185.8). The median NTDR was 31% (range 23-71%), translating to approximately 2 breaks (each break represents a missed treatment that will be made up) for 8 weeks of RT with 5 treatments per week. The 75 percentile of NTDR was 33%, translating to approximately 4 breaks, which was used as the cutoff for analysis. There were no significant differences in freedom from biochemical failure, freedom from distant metastasis, cancer specific survival, or overall survival for men with NTDR ≥33% compared to NTDR<33% for each risk group. Multivariable analyses including NTDR, age, race, Gleason score, T stage, and PSA were performed using the proportional hazards regression procedure. NTDR≥33% was not significantly associated with increased hazard ratio for outcomes in each risk group compared to NTDR<33%. CONCLUSION Unintentional treatment breaks during dose escalated external beam radiation therapy for PCa did not cause a significant difference in outcomes, although duration of follow up limits the strength of this conclusion.
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Affiliation(s)
- Yanqun Dong
- Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, Pennsylvania, USA
| | - Nicholas G Zaorsky
- Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, Pennsylvania, USA.,Department of Radiation Oncology, Penn State Cancer Institute, Hershey, Pennsylvania, USA
| | - Tianyu Li
- Department of Biostatistics, Fox Chase Cancer Center, Philadelphia, Pennsylvania, USA
| | - Thomas M Churilla
- Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, Pennsylvania, USA
| | - Rosalia Viterbo
- Department of Urologic Oncology, Fox Chase Cancer Center, Philadelphia, Pennsylvania, USA
| | - Mark L Sobczak
- Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, Pennsylvania, USA
| | - Marc C Smaldone
- Department of Urologic Oncology, Fox Chase Cancer Center, Philadelphia, Pennsylvania, USA
| | - David Yt Chen
- Department of Urologic Oncology, Fox Chase Cancer Center, Philadelphia, Pennsylvania, USA
| | - Robert G Uzzo
- Department of Urologic Oncology, Fox Chase Cancer Center, Philadelphia, Pennsylvania, USA
| | - Mark A Hallman
- Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, Pennsylvania, USA
| | - Eric M Horwitz
- Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, Pennsylvania, USA
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22
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Mahdavi SR, Janati Esfahani A, Shiran MB, Khoei S, Estiri N. Enhanced DNA Damages of Human Prostate Cancer Cells Induced by Radiofrequency Capacitive Hyperthermia Pre- and Post X-rays: 6 MV versus 15 MV. CELL JOURNAL 2017; 19:79-85. [PMID: 28580311 PMCID: PMC5448316 DOI: 10.22074/cellj.2017.4749] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Accepted: 12/31/2016] [Indexed: 01/18/2023]
Abstract
Objective This study aimed to determine the effect of 13.56 MHz radiofrequency (RF)
capacitive hyperthermia (HT) on radiosensivity of human prostate cancer cells pre and
post X-ray radiation treatment (RT).
Materials and Methods In this experimental study, the human prostate cancer cell line
DU145 was cultured as 300 µm diameter spheroids. We divided the spheroids into group I:
control, group II: HT at 43˚C for 30 minutes (HT), group III: 4 Gy irradiation with 6 MV X-ray [RT
(6 MV)], group IV: 4 Gy irradiation with 15 MV X-ray [RT (15 MV)], group V: HT+RT (6 MV),
group VI: HT+RT (15 MV), group VII: RT (6 MV)+HT, and group VIII: RT (15 MV)+HT. The alkaline
comet assay was used to assess DNA damages in terms of tail moment (TM). Thermal
enhancement factor (TEF) was obtained for the different treatment combinations.
Results Mean TM increased with increasing photon energy. Group II had significantly greater TM compared to group I. Groups III and IV also had significantly higher TM
compared to group I. Significant differences in TM existed between groups V, VII, and III
(P<0.05). We observed significant differences in TM between groups VI, VIII, and IV. TEF
values demonstrated that enhanced response to radiation was more pronounced in group
V compared to the other combined treatments.
Conclusion Our results suggest that HT applied before RT leads to higher radiosensivity
compared to after RT. HT at 43˚C for 30 minutes added to 6 MV X-ray causes higher
enhancement of radiation compared to 15 MV X-ray.
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Affiliation(s)
- Seied Rabi Mahdavi
- Radiation Biology Research Center, Department of Medical Physics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Azam Janati Esfahani
- Department of Medical Physics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Mohammad Bagher Shiran
- Department of Medical Physics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Samideh Khoei
- Department of Medical Physics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Nader Estiri
- Department of Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
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23
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Mowery YM, Salama JK, Zafar SY, Moore HG, Willett CG, Czito BG, Hopkins MB, Palta M. Neoadjuvant long-course chemoradiation remains strongly favored over short-course radiotherapy by radiation oncologists in the United States. Cancer 2016; 123:1434-1441. [DOI: 10.1002/cncr.30461] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Accepted: 10/31/2016] [Indexed: 12/25/2022]
Affiliation(s)
- Yvonne M. Mowery
- Department of Radiation Oncology; Duke University; Durham North Carolina
| | - Joseph K. Salama
- Department of Radiation Oncology; Duke University; Durham North Carolina
| | - S. Yousuf Zafar
- Department of Medicine; Duke University; Durham North Carolina
| | - Harvey G. Moore
- Department of Surgery; Duke University; Durham North Carolina
| | | | - Brian G. Czito
- Department of Radiation Oncology; Duke University; Durham North Carolina
| | | | - Manisha Palta
- Department of Radiation Oncology; Duke University; Durham North Carolina
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Ngwa W, Boateng F, Kumar R, Irvine DJ, Formenti S, Ngoma T, Herskind C, Veldwijk MR, Hildenbrand GL, Hausmann M, Wenz F, Hesser J. Smart Radiation Therapy Biomaterials. Int J Radiat Oncol Biol Phys 2016; 97:624-637. [PMID: 28126309 DOI: 10.1016/j.ijrobp.2016.10.034] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Revised: 09/21/2016] [Accepted: 10/24/2016] [Indexed: 12/22/2022]
Abstract
Radiation therapy (RT) is a crucial component of cancer care, used in the treatment of over 50% of cancer patients. Patients undergoing image guided RT or brachytherapy routinely have inert RT biomaterials implanted into their tumors. The single function of these RT biomaterials is to ensure geometric accuracy during treatment. Recent studies have proposed that the inert biomaterials could be upgraded to "smart" RT biomaterials, designed to do more than 1 function. Such smart biomaterials include next-generation fiducial markers, brachytherapy spacers, and balloon applicators, designed to respond to stimuli and perform additional desirable functions like controlled delivery of therapy-enhancing payloads directly into the tumor subvolume while minimizing normal tissue toxicities. More broadly, smart RT biomaterials may include functionalized nanoparticles that can be activated to boost RT efficacy. This work reviews the rationale for smart RT biomaterials, the state of the art in this emerging cross-disciplinary research area, challenges and opportunities for further research and development, and a purview of potential clinical applications. Applications covered include using smart RT biomaterials for boosting cancer therapy with minimal side effects, combining RT with immunotherapy or chemotherapy, reducing treatment time or health care costs, and other incipient applications.
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Affiliation(s)
- Wilfred Ngwa
- Department of Radiation Oncology, Dana-Farber Cancer Institute, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts; Department of Physics and Applied Physics, University of Massachusetts, Lowell, Massachusetts.
| | - Francis Boateng
- Department of Radiation Oncology, Dana-Farber Cancer Institute, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Rajiv Kumar
- Department of Physics, Northeastern University, Dana-Farber Cancer Institute, Massachusetts
| | - Darrell J Irvine
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts
| | - Silvia Formenti
- Department of Radiation Oncology, Cornell University, Ithaca, New York
| | - Twalib Ngoma
- Department of Clinical Oncology, Muhimbili University of Health and Allied Sciences, Tanzania
| | - Carsten Herskind
- University Medical Center Mannheim, University of Heidelberg, Germany
| | - Marlon R Veldwijk
- University Medical Center Mannheim, University of Heidelberg, Germany
| | | | - Michael Hausmann
- Kirchhoff-Institute for Physics, University of Heidelberg, Germany
| | - Frederik Wenz
- University Medical Center Mannheim, University of Heidelberg, Germany
| | - Juergen Hesser
- University Medical Center Mannheim, University of Heidelberg, Germany
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