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Roach E, Hutten R, Johnson S, Suneja G, Tward J, Petereit D, Gaffney D. The impact of a positive COVID-19 test on timeliness of radiation in patients receiving brachytherapy. Brachytherapy 2024; 23:360-367. [PMID: 38395662 DOI: 10.1016/j.brachy.2024.01.006] [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: 10/22/2023] [Revised: 01/09/2024] [Accepted: 01/19/2024] [Indexed: 02/25/2024]
Abstract
BACKGROUND Delays in initiating and completing brachytherapy may have adverse oncologic outcomes for patients with cervical, uterine, and prostate cancer. The impact of the COVID-19 pandemic on brachytherapy in the United States has not been well-characterized. OBJECTIVES We aim to evaluate how a positive COVID-19 test affected timeliness of treatment for patients undergoing brachytherapy for cervical, uterine, and prostate cancer. METHODS We queried the National Cancer Database to identify patients diagnosed with cervical, uterine, and prostate cancer in 2019 and 2020 who received brachytherapy in their treatment. Patients who tested positive for COVID-19 between cancer diagnosis and start of radiation were compared to those who did not test positive for COVID-19. Time in days from cancer diagnosis to initiation of radiation was compared using two-sample t-tests with p < 0.05 signifying significant differences. RESULTS We identified 38,341 patients with cervical (n = 6,925), uterine (n = 18,587), and prostate cancer (n = 12,829). Rates of COVID-19 positivity were cervical cancer (n = 135; 2%), uterine cancer (n = 236; 1.3%), and prostate cancer (n = 141; 1%). Of those, 35% of cervical, 49% of uterine, and 43% of prostate cancer patients tested positive between their cancer diagnosis and initiation of radiation. Median days to radiation was significantly longer in these patients: 78 versus 51 for cervical cancer (p < 0.01), 150 versus 104 for uterine cancer (p < 0.01), and 154 versus 124 for prostate cancer (p < 0.01). CONCLUSIONS For patients with cervical, uterine, and prostate cancer diagnosed between 2019-2020, testing positive for COVID-19 after their cancer diagnosis was associated with a delay to initiation of radiation by 4-7 weeks.
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Affiliation(s)
- Eric Roach
- Department of Radiation Oncology, Huntsman Cancer Institute, University of Utah, Salt Lake City, UT.
| | - Ryan Hutten
- Department of Human Oncology, University of Wisconsin Comprehensive Cancer Center, Madison, WI
| | - Skyler Johnson
- Department of Radiation Oncology, Huntsman Cancer Institute, University of Utah, Salt Lake City, UT
| | - Gita Suneja
- Department of Radiation Oncology, Huntsman Cancer Institute, University of Utah, Salt Lake City, UT
| | - Jonathan Tward
- Department of Radiation Oncology, Huntsman Cancer Institute, University of Utah, Salt Lake City, UT
| | | | - David Gaffney
- Department of Radiation Oncology, Huntsman Cancer Institute, University of Utah, Salt Lake City, UT
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Li W, Li S, Chen IX, Liu Y, Ramjiawan RR, Leung CH, Gerweck LE, Fukumura D, Loeffler JS, Jain RK, Duda DG, Huang P. Combining losartan with radiotherapy increases tumor control and inhibits lung metastases from a HER2/neu-positive orthotopic breast cancer model. Radiat Oncol 2021; 16:48. [PMID: 33663521 PMCID: PMC7934382 DOI: 10.1186/s13014-021-01775-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 02/23/2021] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Patients with metastatic HER2/neu-positive (HER2/neu +) breast cancer (BC) often experience treatment resistance, disease recurrences and metastases. Thus, new approaches for improving the treatment of HER2/neu + BC to prevent metastatic dissemination are urgently needed. Our previous studies have shown that losartan, an angiotensin receptor blocker, increases tumor perfusion and decreases hypoxia in a number of tumor models. Hypoxia reduces the efficacy of radiation and increases metastases. We therefore hypothesized that by modifying tumor stroma and increasing oxygenation, losartan will improve the outcome of radiotherapy and inhibit disease progression in a highly metastatic HER2/neu + murine BC model. METHODS We established a metastatic HER2/neu + murine BC line (MCa-M3C) and used it to generate mammary fat pad isografts in syngeneic female FVB/N mice. Starting on day 3 after orthotopic tumor implantation, we administered a 7-day losartan treatment (40 mg/kg BW, gavage daily); or a 7-day losartan treatment followed by 20 Gy single dose local irradiation (S-IR) on day 10 (tumor size ~ 100 mm3), or 20 Gy local fractionated (5 × 4 Gy daily) irradiation (F-IR) on days 10-14. We analyzed tumor-growth delay (TGD), development of spontaneous lung metastases, animal survival, tumor vascular density, and tumor hypoxia. RESULTS Treatments with S-IR, F-IR, Losartan + S-IR, or Losartan + F-IR resulted in a significantly increased TGD (8-16 days) in MCa-M3C tumors versus controls. However, the combination of Losartan + S-IR and Losartan + F-IR further enhanced tumor response to radiation alone by increasing TGD an additional 5 to 8 days for both single and fractionated dose irradiation (P < 0.01), decreasing lung metastasis (Losartan + IR vs. Control, P < 0.025), and increasing animal survival (Losartan + IR vs. Control, P = 0.0303). In addition, losartan treatment significantly increased tumor vascularity (P = 0.0314) and decreased pimonidazole positive (hypoxic) area (P = 0.0002). CONCLUSIONS Combining losartan with local irradiation significantly enhanced tumor response, at least in part via reduced tumor hypoxia presumably due to increased tumor perfusion. Our findings suggest that combining losartan with radiotherapy is a potential new treatment strategy for local control and inhibiting metastasis in HER2 + BC.
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Affiliation(s)
- Wende Li
- Edwin L. Steele Laboratories, Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, 100 Blossom Street, Cox-7, Boston, MA, 02114, USA
- Guangdong Laboratory Animal Monitoring Institute, Guangzhou, 510663, People's Republic of China
| | - Sen Li
- Edwin L. Steele Laboratories, Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, 100 Blossom Street, Cox-7, Boston, MA, 02114, USA
- Department of Spinal Surgery, Affiliated Traditional Chinese Medicine Hospital, Southwest Medical University, Luzhou, 646000, People's Republic of China
| | - Ivy X Chen
- Edwin L. Steele Laboratories, Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, 100 Blossom Street, Cox-7, Boston, MA, 02114, USA
| | - Yujiao Liu
- Edwin L. Steele Laboratories, Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, 100 Blossom Street, Cox-7, Boston, MA, 02114, USA
| | - Rakesh R Ramjiawan
- Edwin L. Steele Laboratories, Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, 100 Blossom Street, Cox-7, Boston, MA, 02114, USA
| | - Chi-Ho Leung
- Edwin L. Steele Laboratories, Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, 100 Blossom Street, Cox-7, Boston, MA, 02114, USA
- Division of Urology, Department of Surgery, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Leo E Gerweck
- Edwin L. Steele Laboratories, Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, 100 Blossom Street, Cox-7, Boston, MA, 02114, USA
| | - Dai Fukumura
- Edwin L. Steele Laboratories, Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, 100 Blossom Street, Cox-7, Boston, MA, 02114, USA
| | - Jay S Loeffler
- Edwin L. Steele Laboratories, Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, 100 Blossom Street, Cox-7, Boston, MA, 02114, USA
| | - Rakesh K Jain
- Edwin L. Steele Laboratories, Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, 100 Blossom Street, Cox-7, Boston, MA, 02114, USA
| | - Dan G Duda
- Edwin L. Steele Laboratories, Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, 100 Blossom Street, Cox-7, Boston, MA, 02114, USA
| | - Peigen Huang
- Edwin L. Steele Laboratories, Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, 100 Blossom Street, Cox-7, Boston, MA, 02114, USA.
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Dewan A, Mitra S, Aggarwal S, Barik S, Kaur I, Umesh P, Dewan R. Management of cervical cancer during the corona virus disease-19 (COVID-19) era. Br J Radiol 2020; 94:20200686. [PMID: 33216637 PMCID: PMC7774674 DOI: 10.1259/bjr.20200686] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
COVID-19 pandemic has had a catastrophic impact on the society, economy and heath-care system all over the globe with virus showing no signs of losing potency. As the situation appears to worsen, extra burden on other specialities like oncology seems to increase. Specific recommendations are necessary for management of cervical cancer in the current context. All concerned specialities must work together in the best interest of the patient. Attempts should be made at managing cervical cancer while limiting the viral spread among the patients and health-care workers without the loss of opportunity. Surgical intervention for early cervical cancer should be postponed or alternative modalities be considered. In a locally advanced disease, concurrent chemoradiation is the treatment of choice. In addition, the following under mentioned suggestions aim to discuss ways of minimizing infection spread, workload rationalization and providing guidance for management of cervical cancer in the presence of COVID-19 infection.
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Affiliation(s)
- Abhinav Dewan
- Department of Radiation Oncology, Rajiv Gandhi Cancer Institute and Research Centre, New Delhi, India
| | - Swarupa Mitra
- Department of Radiation Oncology, Rajiv Gandhi Cancer Institute and Research Centre, New Delhi, India
| | - Sumeet Aggarwal
- Department of Radiation Oncology, Rajiv Gandhi Cancer Institute and Research Centre, New Delhi, India
| | - Soumitra Barik
- Department of Radiation Oncology, Rajiv Gandhi Cancer Institute and Research Centre, New Delhi, India
| | - Inderjeet Kaur
- Department of Radiation Oncology, Rajiv Gandhi Cancer Institute and Research Centre, New Delhi, India
| | - Preetha Umesh
- Department of Radiation Oncology, Rajiv Gandhi Cancer Institute and Research Centre, New Delhi, India
| | - Rupali Dewan
- Department of Gynecology and Obstetrics, Vardhman Mahavir Medical College and Safdarjung Hospital, New Delhi, India
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Williams VM, Kahn JM, Harkenrider MM, Chino J, Chen J, Fang LC, Dunn EF, Fields E, Mayadev JS, Rengan R, Petereit D, Dyer BA. COVID-19 impact on timing of brachytherapy treatment and strategies for risk mitigation. Brachytherapy 2020; 19:401-411. [PMID: 32359937 PMCID: PMC7172676 DOI: 10.1016/j.brachy.2020.04.005] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 04/10/2020] [Accepted: 04/10/2020] [Indexed: 01/08/2023]
Abstract
PURPOSE The purpose of this study was to highlight the importance of timely brachytherapy treatment for patients with gynecologic, breast, and prostate malignancies, and provide a framework for brachytherapy clinical practice and management in response to the COVID-19 pandemic. METHODS AND MATERIALS We review amassing evidence to help guide the management and timing of brachytherapy for gynecologic, breast, and prostate cancers. Where concrete data could not be found, peer-reviewed expert opinion is provided. RESULTS There may be a significant negative impact on oncologic outcomes for patients with gynecologic malignancies who have a delay in the timely completion of therapy. Delay of prostate or breast cancer treatment may also impact oncologic outcomes. If a treatment delay is expected, endocrine therapy may be an appropriate temporizing measure before delivery of radiation therapy. The use of shorter brachytherapy fractionation schedules will help minimize patient exposure and conserve resources. CONCLUSIONS Brachytherapy remains a critical treatment for patients and may shorten treatment time and exposure for some. Reduced patient exposure and resource utilization is important during COVID-19. Every effort should be made to ensure timely brachytherapy delivery for patients with gynecologic malignancies, and endocrine therapy may help temporize treatment delays for breast and prostate cancer patients. Physicians should continue to follow developing institutional, state, and federal guidelines/recommendations as challenges in delivering care during COVID-19 will continue to evolve.
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Affiliation(s)
| | - Jenna M Kahn
- Department of Radiation Oncology, Oregon Health & Science University, Portland, OR
| | | | - Junzo Chino
- Department of Radiation Oncology, Duke University, Durham, VA
| | - Jonathan Chen
- Department of Radiation Oncology, University of Washington, Seattle, WA
| | - L Christine Fang
- Department of Radiation Oncology, University of Washington, Seattle, WA
| | - Emily F Dunn
- Department of Radiation Oncology, Willamette Valley Cancer Institute and Research Center, Eugene, OR
| | - Emma Fields
- Department of Radiation Oncology, Virginia Commonwealth University, Richmond, VA
| | - Jyoti S Mayadev
- Department of Radiation Medicine and Applied Sciences, University of California San Diego, La Jolla, CA
| | - Ramesh Rengan
- Department of Radiation Oncology, University of Washington, Seattle, WA
| | - Daniel Petereit
- Department of Radiation Oncology, Monument Health Cancer Care Institute, Rapid City, SD
| | - Brandon A Dyer
- Department of Radiation Oncology, University of Washington, Seattle, WA.
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Yasuda M, Hatanaka T, Shirato H, Nishioka T. Involvement of UTR-dependent gene expression in the maintenance of cancer stem cell like phenotypes. Oncol Lett 2016; 10:3171-3176. [PMID: 26722307 DOI: 10.3892/ol.2015.3688] [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: 10/18/2014] [Accepted: 08/05/2015] [Indexed: 11/06/2022] Open
Abstract
The present study demonstrated the acquisition of additional malignant characteristics in irradiated mouse fibrosarcoma cells compared with the parent cells. Several reporter assays indicated that hypoxia-inducible factor (HIF)-1α, activator protein-1 and Ets-dependent transcription were activated in irradiated cells. The cis-elements in the 5'-untranslated region (UTR) of these transcription factors plays a major role in their expression in surviving irradiated cancer cells. By contrast, there were no evident differences between the 3'-UTR-dependent repression demonstrated by parent cells and irradiated cells. A small population of parental fibrosarcoma cells was also found to exhibit the same enhanced 5'-UTR-dependent HIF-1α expression as that demonstrated by irradiated cells. These observations may indicate that high-dose X-ray irradiation affects the majority of proliferating cancer cells, but not the cancer stem cells (CSCs), and an increased CSC population may explain the progressive phenotypes of the irradiated cells. It appears likely that the transcription factors that maintain stemness are regulated by the same 5'-UTR-dependent mechanism.
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Affiliation(s)
- Motoaki Yasuda
- Department of Oral Pathobiology, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Hokkaido 060-8586, Japan
| | - Tomoyuki Hatanaka
- Department of Oral Pathobiology, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Hokkaido 060-8586, Japan
| | - Hiroki Shirato
- Department of Radiology and Nuclear Medicine, Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido 060-8638, Japan
| | - Takeshi Nishioka
- Department of Biological Sciences, Graduate School of Science, Hokkaido University, Sapporo, Hokkaido 060-0812, Japan
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Tillner F, Thute P, Bütof R, Krause M, Enghardt W. Pre-clinical research in small animals using radiotherapy technology – a bidirectional translational approach. Z Med Phys 2014; 24:335-51. [DOI: 10.1016/j.zemedi.2014.07.004] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Revised: 07/18/2014] [Accepted: 07/18/2014] [Indexed: 01/17/2023]
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Yue JB, Yang J, Liu J, Lee J, Cabrera AR, Sun XD, Bai GH, Li YH, Yu JM. Histopathologic validation of 3′-deoxy-3′-18F-fluorothymidine PET for detecting tumor repopulation during fractionated radiotherapy of human FaDu squamous cell carcinoma in nude mice18F-FLT PET repopulation -->. Radiother Oncol 2014; 111:475-81. [DOI: 10.1016/j.radonc.2014.04.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Revised: 03/31/2014] [Accepted: 04/07/2014] [Indexed: 12/25/2022]
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Yang J, Yue JB, Liu J, Yu JM. Repopulation of tumor cells during fractionated radiotherapy and detection methods (Review). Oncol Lett 2014; 7:1755-1760. [PMID: 24932228 PMCID: PMC4049693 DOI: 10.3892/ol.2014.1990] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Accepted: 02/26/2014] [Indexed: 12/18/2022] Open
Abstract
Repopulation of tumor cells during radiotherapy is believed to be a significant cause for treatment failure. The phenomenon of tumor repopulation during fractionated radiotherapy was found from clinical observations that identified that the local control rate decreased with a prolonged treatment time. A series of animal experiments with varied overall treatment time and fractionated doses were performed to demonstrate tumor cell repopulation during radiotherapy in various mouse xenograft models. However, conventional detection methods are challenging, as it is difficult to separate viable cells from those destined for apoptosis during fractionated radiotherapy. In essence, the mechanism of tumor repopulation involves the continuing proliferation of clonogenic tumor cells. In vivo imaging, tracking and targeting of the repopulation of these cells has been of clinical interest so as to administer a higher dose to the tumor repopulation regions. Currently, functional imaging methods, including 3'-deoxy-3'-18F-fluorothymidine positron emission tomography (18F-FLT PET), are showing promise in assessing the proliferation activity of tumors in vivo. This review mainly focuses on the phenomenon of tumor repopulation during radiotherapy and its conventional and novel detection methods, particularly on the feasibility of 18F-FLT PET for the detection of tumor-cell repopulation.
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Affiliation(s)
- Jia Yang
- Shandong Cancer Hospital and Institute, Jinan University, Shandong Academy of Medical Sciences, Jinan, Shandong 250117, P.R. China
| | - Jin-Bo Yue
- Department of Radiation Oncology, Shandong Cancer Hospital and Institute, Jinan, Shandong 250117, P.R. China
| | - Jing Liu
- Graduate Education Centre of Shandong Academy of Medical Sciences, Jinan, Shandong 250117, P.R. China
| | - Jin-Ming Yu
- Department of Radiation Oncology, Shandong Cancer Hospital and Institute, Jinan, Shandong 250117, P.R. China
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Gossman MS, Das IJ, Sharma SC, Lopez JP, Howard CM, Claudio PP. A novel phantom model for mouse tumor dose assessment under MV beams. HEALTH PHYSICS 2011; 101:746-53. [PMID: 22048493 PMCID: PMC3208162 DOI: 10.1097/hp.0b013e31821a4838] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In order to determine a mouse's dose accurately and prior to engaging in live mouse radiobiological research, a tissue-equivalent tumor-bearing phantom mouse was constructed and bored to accommodate detectors. Comparisons were made among four different types of radiation detectors, each inserted into the mouse phantom for radiation measurement under a 6 MV linear accelerator beam. Dose detection response from a diode, thermoluminescent dosimeters, and metal-oxide semiconductor field-effect transistors were used and compared to that of a reference pinpoint ionization chamber. A computerized treatment planning system was also directly compared to the chamber. Each detector system demonstrated results similar to the dose computed by the treatment planning system, although some differences were noted. The average disagreement from an accelerator calibrated output dose prescription in the range of 200-400 cGy was -0.4% ± 0.5 σ for the diode, -2.4% ± 2.6 σ for the TLD, -2.9% ± 5.0 σ for the MOSFET, and +1.3% ± 1.4 σ for the treatment planning system. This phantom mouse design is unique, simple, reproducible, and therefore recommended as a standard approach to dosimetry for radiobiological mouse studies by means of any of the detectors used in this study. The authors fully advocate for treatment planning modeling when possible prior to linac-based dose delivery.
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Affiliation(s)
- Michael S. Gossman
- Tri-State Regional Cancer Center, Radiation Oncology Department, 706 23 Street, Ashland, Kentucky 41101 USA; , , (606) 329-0060
| | - Indra J. Das
- Indiana University, School of Medicine, Radiation Oncology Department, 535 Barnhill Drive, RT 041, Indianapolis, Indiana 46202 USA; , (317) 944-1303
| | - Subhash C. Sharma
- Parkview Comprehensive Cancer Center, Radiation Oncology Department, 11141 Parkview Plaza Drive, Fort Wayne, Indiana 46845 USA; , (260) 266-9100
| | - Jeffrey P. Lopez
- Tri-State Regional Cancer Center, Radiation Oncology Department, 706 23 Street, Ashland, Kentucky 41101 USA; , , (606) 329-0060
| | - Candace M. Howard
- Marshall University School of Medicine, Department of Biochemistry and Microbiology, & Department of Surgery, One John Marshall Drive, BBSC 336-Q, Huntington, West Virginia 25755 USA; , (304) 696-3516
| | - Pier P. Claudio
- Marshall University School of Medicine, Department of Biochemistry and Microbiology, & Department of Surgery, One John Marshall Drive, BBSC 336-Q, Huntington, West Virginia 25755 USA; , (304) 696-3516
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Final results of the randomized phase III CHARTWEL-trial (ARO 97-1) comparing hyperfractionated-accelerated versus conventionally fractionated radiotherapy in non-small cell lung cancer (NSCLC). Radiother Oncol 2011; 100:76-85. [PMID: 21757247 DOI: 10.1016/j.radonc.2011.06.031] [Citation(s) in RCA: 125] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2011] [Revised: 06/14/2011] [Accepted: 06/14/2011] [Indexed: 12/17/2022]
Abstract
BACKGROUND Continuous hyperfractionated accelerated radiotherapy (CHART) counteracts repopulation and may significantly improve outcome of patients with non-small-cell lung cancer (NSCLC). Nevertheless high local failure rates call for radiation dose escalation. We report here the final results of the multicentric CHARTWEL trial (CHART weekend less, ARO 97-1). PATIENTS AND METHODS Four hundred and six patients with NSCLC were stratified according to stage, histology, neoadjuvant chemotherapy and centre and were randomized to receive 3D-planned radiotherapy to 60Gy/40 fractions/2.5weeks (CHARTWEL) or 66Gy/33 fractions/6.5weeks (conventional fractionation, CF). RESULTS Overall survival (OS, primary endpoint) at 2, 3 and 5yr was not significantly different after CHARTWEL (31%, 22% and 11%) versus CF (32%, 18% and 7%; HR 0.92, 95% CI 0.75-1.13, p=0.43). Also local tumour control rates and distant metastases did not significantly differ. Acute dysphagia and radiological pneumonitis were more pronounced after CHARTWEL, without differences in clinical signs of pneumopathy. Exploratory analysis revealed a significant trend for improved LC after CHARTWEL versus CF with increasing UICC, T or N stage (p=0.006-0.025) and after neoadjuvant chemotherapy (HR 0.48, 0.26-0.89, p=0.019). CONCLUSIONS Overall, outcome after CHARTWEL or CF was not different. The lower total dose in the CHARTWEL arm was compensated by the shorter overall treatment time, confirming a time factor for NSCLC. The higher efficacy of CHARTWEL versus CF in advanced stages and after chemotherapy provides a basis for further trials on treatment intensification for locally advanced NSCLC.
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Heymann S, Jung GM, Simon P, Bergerat JP, Borel C, Di Marco A, Kurtz JE, Marcellin L, Ghnassia JP, Dufour P, Noël G. [Late outcome of 89 patients with soft-tissue sarcomas treated by surgery and three different radiotherapy schedules]. Cancer Radiother 2007; 11:443-51. [PMID: 17981486 DOI: 10.1016/j.canrad.2007.09.143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2007] [Revised: 08/01/2007] [Accepted: 09/20/2007] [Indexed: 11/29/2022]
Abstract
PURPOSE To evaluate the outcome of patients treated for soft tissue sarcoma using three different post-operative radiotherapy schedules. METHODS AND MATERIALS Between 1990 and 2003, 89 patients (median age 50.8 years) presenting with soft tissue sarcoma (located to the limbs for 66 of them) underwent post-conservative-surgery radiotherapy. Pathology was liposarcoma in 35 cases and 54 others tumors. Tumors grades (FNCLCC classification) were 1, 2, 3 or unknown in 29, 32, 19 and 9 cases, respectively. Surgery was considered as complete in 68 patients. Irradiation was normofractionated (NF) in 62 cases, hyperfractionated (BF) in 19 cases and hypofractionated (HF) in 8 cases. For all the patients, median delivered dose was 61 Gy [34-76 Gy]. RESULTS Median follow-up of alive patients was 73,8 months [3-184]. Five-year local control (LC) and overall survival (OS) rates were 85.5 and 71.2% respectively. According to multifactorial analysis, favourable prognostic factors were for local control, complete surgery (P=0.0075) and for overall survival, complete surgery (P=0.0267), grade 1 tumor (P=0.012) and absence of distant recurrence (P=0.0488). There was no statistical evidence of difference for the five-year LC and OS rates between the patients who received NF, BF or HF. There were few complications and there were comparable in the three groups. CONCLUSIONS This retrospective serie showed similar results for all the schedules. There is no evidence to recommend bifractionation. Hypofractionation should be used only in selected patients with poor performans status.
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Affiliation(s)
- S Heymann
- Service de radiothérapie, centre de lutte contre le cancer Paul-Strauss, 3, rue de la Porte-de-l'Hôpital, BP 42, 67065 Strasbourg cedex, France.
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Pinel S, Chastagner P, Merlin JL, Marchal C, Taghian A, Barberi-Heyob M. Topotecan Can Compensate for Protracted Radiation Treatment Time Effects in High Grade Glioma Xenografts*. J Neurooncol 2005; 76:31-8. [PMID: 16311843 DOI: 10.1007/s11060-005-3666-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
PURPOSE Several studies reported that prolongation of overall treatment time of fractionated radiotherapy reduces the chance of tumor control. In the present study, we hypothesize that combining topotecan with irradiation could compensate for this detrimental time effect on the radioresponse. Therefore, we investigated the efficiency of different schedules of topotecan (TPT), radiotherapy (RT) or concomitant combination TPT + RT. METHODS AND MATERIALS Experiments were performed in two human high-grade glioma xenograft models (U87 and GBM Nan1). TPT and RT were delivered at a total dose of 3 mg/kg and 40 Gy, respectively. For the TPT + RT groups, TPT was injected 5 min before radiation. Total radiation doses were delivered in 5, 10, 20, or 30 fractions over 1, 2, 4, or 6 weeks, respectively. The efficiency of TPT, RT, and TPT + RT was evaluated by tumor growth delay (TGD). RESULTS At this low total dose, and independent of the schedule, no efficacy was found in TPT-treated glioma xenografts. Conversely, radiotherapy-induced antitumor effect decreased with prolongation of treatment time. For TPT + RT combination, antitumor activity was not influenced by schedule, and tumor response was always comparable to those measured for the shortest and the most efficient irradiation schedule (i.e. 1 week). When treatment was delivered over 4 or 6 weeks in U87 glioma xenografts, therapeutic enhancement ratios reached 2.6 and 3.7, respectively. This indicated that the interaction between ionizing radiation and topotecan was synergistic. CONCLUSION The present study demonstrated that concomitant topotecan can compensate for the detrimental effect of treatment time protraction on radiotherapy efficacy in two malignant glioma xenografts.
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Affiliation(s)
- Sophie Pinel
- Laboratoire de Recherche en Oncologie, Centre A. Vautrin, Vandoeuvre-lès-Nancy, France.
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13
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Kim JJ, Tannock IF. Repopulation of cancer cells during therapy: an important cause of treatment failure. Nat Rev Cancer 2005; 5:516-25. [PMID: 15965493 DOI: 10.1038/nrc1650] [Citation(s) in RCA: 536] [Impact Index Per Article: 28.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Radiotherapy and chemotherapy are given in multiple doses, which are spaced out to allow the recovery of normal tissues between treatments. However, surviving cancer cells also proliferate during the intervals between treatments and this process of repopulation is an important cause of treatment failure. Strategies developed to overcome repopulation have improved clinical outcomes, and now new strategies to inhibit repopulation are emerging in parallel with advances in the understanding of underlying biological mechanisms.
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Affiliation(s)
- John J Kim
- Department of Radiation Oncology, Princess Margaret Hospital and University of Toronto, 610 University Avenue, Toronto, ON M5G 2M9, Canada
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Haustermans K, Fowler JF. Is there a future for cell kinetic measurements using IdUrd or BdUrd? Int J Radiat Oncol Biol Phys 2001; 49:505-11. [PMID: 11173147 DOI: 10.1016/s0360-3016(00)01506-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
PURPOSE The analysis of causes of radiation failure both in retrospective series of patients with head and neck cancer and in several randomized clinical trials suggests a loss of local control as the overall treatment time increases for the same total dose. This is attributed to tumor cell proliferation during fractionated radiotherapy. As longer treatment times lead to loss of local control, it has been suggested that shorter treatment times could lead to an increase in local control. For this reason accelerated treatment regimens have been and are being designed. However, these treatments may cause severe acute reactions. Due to this, lower total doses are sometimes given. Slowly proliferating tumors, therefore, may do worse when treated with accelerated schedules compared with conventional schedules. In addition, it is not desirable to subject all patients to the more intense acute reactions of accelerated schedules. It would thus be useful to predict which tumors will rapidly proliferate during treatment and are likely to benefit from accelerated radiotherapy. The potential doubling time (Tpot) is defined as the time within which the cell population of a tumor would double if there were no cell loss. The hypothesis is that the median Tpot measured before treatment might correlate with the effective doubling time (Tp) during treatment. CONCLUSION Tpot can be calculated knowing the labeling index (LI; proportion of cells incorporating the DNA precursor IdUrd or BdUrd) and Ts (the DNA synthesis time) measured by flow cytometry. A recent multicenter analysis has shown that the only pretreatment kinetic parameter for which some evidence is found for an association with local control is LI, not Tpot. Pitfalls associated with cell kinetic measurements such as assay variability, intratumor and intertumor variability, interlaboratory variability and the problem of an admixture of normal and malignant cells make Tpot not accurate and reproducible enough for a robust predictive assay. It therefore appears that pretreatment Tpot measurements using flow cytometry, provide only a relatively weak predictor of outcome after radiotherapy in head and neck cancer. Immunohistochemistry allows a simple measure of LI and may give additional independent information from labeling patterns, suggesting that this method is the (short term) future for clinical cell kinetic measurements using BdUrd or IdUrd.
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Affiliation(s)
- K Haustermans
- Department of Radiation Oncology, UH Leuven, Leuven, Belgium
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Le Péchoux C, Le Deley MC, Delaloge S, Lartigau E, Levy-Piedbois C, Bonvalot S, Le Cesne A, Missenard G, Terrier P, Vanel D, Genin J, Fontaine F. Postoperative radiotherapy in the management of adult soft tissue sarcoma of the extremities: results with two different total dose, fractionation, and overall treatment time schedules. Int J Radiat Oncol Biol Phys 1999; 44:879-86. [PMID: 10386645 DOI: 10.1016/s0360-3016(99)00077-2] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
PURPOSE This retrospective study was performed to evaluate two postoperative radiotherapy schedules in terms of dose, fractionation, and overall treatment time in soft tissue sarcoma (STS) of the extremities. METHODS AND MATERIALS Between January 1984 and December 1993, 62 patients with newly diagnosed localized STS of the extremities were treated with maximal conservative surgery and postoperative radiotherapy (RT). Forty-five patients received 50 Gy with conventional fractionation plus a boost dose (5 to 20 Gy). Seventeen patients had hyperfractionated accelerated radiotherapy (HFART) up to a dose of 45 Gy in 3 weeks. RESULTS With a median follow-up of 72 months, the 5-year local failure rate was 25%, the 5-year disease-free and overall survival rates were respectively 42% and 62%. The 3-year local relapse, disease-free, and overall survival rates were respectively 16%, 44%, and 70% in the conventional radiotherapy group, and 36%, 47%, and 82% in the HFART group (NS). No factor significantly influenced local control with a trend, however, in favor of conventional RT (p = 0.10). CONCLUSION HFART at the dose of 45 Gy does not seem to be superior to the standard RT schedule, neither in terms of local control, survival, nor in terms of long-term side effects. However this dose could be considered too low as well as the power of comparison between the two groups to draw definitive conclusions.
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Affiliation(s)
- C Le Péchoux
- Department of Radiotherapy, Institut Gustave Roussy, Villejuif, France
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Sham E, Durand RE. Cell kinetics and repopulation parameters of irradiated xenograft tumours in SCID mice: comparison of two dose-fractionation regimens. Eur J Cancer 1999; 35:850-8. [PMID: 10505048 DOI: 10.1016/s0959-8049(99)00019-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The extent and mechanism(s) of repopulation were assessed in SiHa (human cervical squamous cell carcinoma) xenografts in SCID mice for two fractionated irradiation regimens. Mice in one arm of the study received 50 Gy in 20 fractions over 23 days with a 14 day split between 10 fraction, 5 day courses. The other tumours were treated with 50 Gy in 20 fractions over 10 consecutive days. Cell kinetics and tumour regrowth parameters were monitored during and after treatment by measuring tumour volume and analysing cellular DNA content and proliferation parameters with flow cytometry. Repopulation occurred rapidly, beginning during irradiation and largely attributable to an increased growth fraction and decreased potential doubling time, apparently triggered by increased cell loss. Cell cycle time, in contrast, remained relatively constant throughout. Extrapolation of these results to humans suggests that treatment times should be minimised whenever possible, since regrowth rates exceeded those predicted from pretreatment Tpot measurements.
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Affiliation(s)
- E Sham
- British Columbia Cancer Agency, Department of Radiation Oncology, Vancouver, Canada
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Urano M, Nishimura Y, Kuroda M, Reynolds R. Are hypoxic cells critical for the outcome of fractionated radiotherapy in a slow-growing mouse tumor? Radiother Oncol 1998; 48:221-8. [PMID: 9783896 DOI: 10.1016/s0167-8140(98)00010-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
PURPOSE To investigate the significance of hypoxic cells, reoxygenation and repopulation for the outcome of fractionated radiotherapy of a slow-growing subline of a murine fibrosarcoma and to compare the results with those previously obtained from the original fast-growing tumor. MATERIALS AND METHODS A slow-growing subline, 457-O, was obtained among the tumors that recurred after a single irradiation to the third generation isotransplants of a mouse fibrosarcoma, FSa-II. The single cell suspensions were transplanted into the mouse foot and when the tumors reached an average diameter of 4 mm, they were subjected to one to 20 equal daily y-ray doses given in air (A) or under hypoxic conditions (H). The TCD50 (50% tumor control radiation dose) was calculated according to the tumor control frequency within 180 days. The linear-quadratic plus time model was fitted to these data by logistic regression analysis. RESULTS The volume doubling time of the 457-O tumors was approximately 2.2 times slower than that of the original FSa-II tumors. The TCD50(H) (single dose) was 52.3 Gy and increased with an increasing number of fractions to a TCD50(H) (20 doses) of 90.8 Gy. This increase of 38.5 Gy was much smaller than that of 149 Gy for the original FSa-II. The TCD50(A) (single dose) and TCD50(A) (20 doses) were 41.3 and 50.6 Gy, respectively. This small difference of 9.3 Gy contrasted with a significant increase of 52.9 Gy for the FSa-II. DISCUSSION These results suggested no repopulation of 457-O tumor clonogens during the course of up to 20 daily doses, while the original FSa-II tumor cells repopulated substantially. Hypoxic clonogens in the slow-growing tumor reoxygenated but some fractions remained critical. CONCLUSION The present data together with those obtained from the fast-growing FSa-II suggested that hypoxic clonogens were critical for the outcome of fractionated radiotherapy. Repopulation was insignificant in this slow-growing tumor during five to 20 daily doses.
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Affiliation(s)
- M Urano
- Department of Radiation Medicine, University of Kentucky Medical Center, Lexington 40536-0084, USA
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Abstract
Hyperfractionation is generally expected to allow an escalation of total dose, thereby increasing tumour control rate, without increasing the risk of late complications. The purpose of this review is to assess the empirical evidence for this therapeutic gain from hyperfractionated radiotherapy. Although extensive clinical data have been accumulated until now, especially on treatment of head and neck cancer, the line of evidence is not consistent. The present analysis indicates that the dose per fraction generally used in standard radiotherapy is already a good choice.
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Affiliation(s)
- H P Beck-Bornholdt
- Institute of Biophysics and Radiobiology, University of Hamburg, Germany
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Huang P, Taghian A, Hsu DW, Perez LA, Allam A, Duffy M, DaCosta A, Suit HD. Spontaneous metastasis, proliferation characteristics and radiation sensitivity of fractionated irradiation recurrent and unirradiated human xenografts. Radiother Oncol 1996; 41:73-81. [PMID: 8961371 DOI: 10.1016/s0167-8140(96)91803-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
PURPOSE Do tumor cells which survive high dose fractionated irradiation exhibit modified metastasis activity, proliferation kinetics, and/or radiation sensitivity? To address this question experimentally, we have studied three recurrent human tumor xenograft systems. METHODS AND MATERIALS Three models were derived from a soft tissue sarcoma (HSTS26T), a colon adenocarcinoma (HCT15), and a glioblastoma (HGL21) which had recurred after 90 Gy, 109 Gy, or 77.4 Gy administered in 30 equal doses, respectively. Their production of spontaneous metastasis and cell proliferation characteristics were studied in early generation xenografts in SCID mice, and were compared to those in their previously unirradiated counterparts. As a control, we have also studied each tumor as a post-surgical recurrence. Specimens from the irradiated recurrent and their unirradiated primary tumors were cultured in vitro and their radiation sensitivity determined by clonogenic assay. RESULTS The three irradiated recurrent tumor systems retained the individual histological features of their unirradiated primary xenografts. A lower metastatic incidence was observed in two of the three irradiated recurrent tumor lines in comparison with their unirradiated control tumors and their surgical recurrent counterparts. No significant differences were found between the irradiated recurrent tumors and their unirradiated counterparts with respect to: volume doubling time, growth time, potential doubling time, mitotic index, PCNA index, and SF2 values. CONCLUSIONS High dose irradiation given in 30 fractions did not increase the metastatic activity in the three human tumor xenograft systems. Furthermore, the fractionated irradiation did not significantly change their proliferation characteristics and cellular radiation sensitivity.
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Affiliation(s)
- P Huang
- Edwin L. Steele Laboratory of Radiation Biology, Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, Boston 02114, USA
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Thames HD, Ruifrok AC, Milas L, Hunter N, Mason KA, Terry NH, White RA. Accelerated repopulation during fractionated irradiation of a murine ovarian carcinoma: downregulation of apoptosis as a possible mechanism. Int J Radiat Oncol Biol Phys 1996; 35:951-62. [PMID: 8751404 DOI: 10.1016/0360-3016(96)00256-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
PURPOSE To test whether accelerated tumor clonogen repopulation occurs during continuous fractionated radiotherapy of a slow-growing mouse ovarian tumor, and if so whether the accelerated rate of repopulation is predicted by the pretreatment potential doubling time, and whether changes in apoptotic response are a possible mechanism for this change. METHODS AND MATERIALS The rate of clonogen production during fractionated radiotherapy was followed using the tumor-control assay, with an independent determination of the sensitivity to repeated dose fractions in vivo in the absence of repopulation. The pretreatment potential doubling time was measured by bromodeoxyuridine (BrdUrd) labeling and fluorescence measurements. The apoptotic and mitotic indices at various times during treatment were scored histologically. RESULTS The slow-growing (pretreatment volume doubling time 6 days) ovarian tumor OCA responds to daily irradiation with 6 Gy under hypoxia by negligible tumor clonogen production in the first few days, followed by a change at about 9 days to accelerated repopulation, after which the effective clonogen doubling time Tclon was about 2 days, near the pretreatment Tpot of 1.7 days. Alternative interpretations of the data, such as a change in radiosensitivity vs. a change in the repopulation rate or acceleration at 3 days as opposed to 9 days, were shown to be unlikely. This change was accompanied by a reduced apoptotic response (measured morphometrically). CONCLUSIONS When sensitivity to fractionated doses has been corrected for in vivo, this slow-growing mouse tumor exhibits a change to accelerated clonogen production during a continuous radiotherapy regimen that is accompanied or preceded by a reduced histologic apoptotic response. Tclon during accelerated repopulation was slightly longer than the pretreatment Tpot.
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Affiliation(s)
- H D Thames
- Department of Biomathematics, University of Texas M.D. Anderson Cancer Center, Houston 77030, USA
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Murata R, Nishimura Y, Shibamoto Y, Hiraoka M, Abe M. Changes in cell proliferative parameters of SCCVII and EMT6 murine tumors after single-dose irradiation. Jpn J Cancer Res 1996; 87:662-8. [PMID: 8766532 PMCID: PMC5921140 DOI: 10.1111/j.1349-7006.1996.tb00274.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
To understand better the repopulation kinetics of tumor cells after radiotherapy, we investigated changes in cell proliferative parameters after single-dose irradiation of SCCVII tumors in C3H/He mice and EMT6 tumors in Balb/c mice. The following parameters were determined 0-15 days after single irradiation at 20 or 30 Gy; dividing fraction (DF), potential doubling time (Tpot), number of clonogenic cells per tumor (Ncln), and volume doubling time (Tvol). DF and Tpot were determined by in vivo-in vitro cytokinesis-block assay with cytochalasin B, Ncln was measured by in vivo-in vitro colony-forming assay, and Tvol was determined by growth delay assay. In both tumors, longer Tpot and lower DF and Ncln were obtained for 3-4 days after irradiation, but in SCCVII tumors these values returned to the pretreatment levels 9 days after irradiation. In EMT6 tumors, Tpot, DF, and Ncln did not return to the pretreatment levels even 12 days after irradiation. In the regrowth phase of both tumors following irradiation at 20 Gy, Tvol was longer than the pretreatment level, although Tpot was similar in SCCVII and only slightly longer in EMT6. Therefore, the cell loss factor in the regrowth phase was considered to be higher than the pretreatment level in both tumors. From the results, recruitment of previously quiescent cells into the proliferative pool in these tumors was suggested to contribute to repopulation after radiation.
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Affiliation(s)
- R Murata
- Department of Radiology, Faculty of Medicine, Kyoto University, Kyoto, Japan
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