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Hanson I, Pitman KE, Edin NFJ. The Role of TGF-β3 in Radiation Response. Int J Mol Sci 2023; 24:ijms24087614. [PMID: 37108775 PMCID: PMC10141893 DOI: 10.3390/ijms24087614] [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: 03/16/2023] [Revised: 04/18/2023] [Accepted: 04/19/2023] [Indexed: 04/29/2023] Open
Abstract
Transforming growth factor-beta 3 (TGF-β3) is a ubiquitously expressed multifunctional cytokine involved in a range of physiological and pathological conditions, including embryogenesis, cell cycle regulation, immunoregulation, and fibrogenesis. The cytotoxic effects of ionizing radiation are employed in cancer radiotherapy, but its actions also influence cellular signaling pathways, including that of TGF-β3. Furthermore, the cell cycle regulating and anti-fibrotic effects of TGF-β3 have identified it as a potential mitigator of radiation- and chemotherapy-induced toxicity in healthy tissue. This review discusses the radiobiology of TGF-β3, its induction in tissue by ionizing radiation, and its potential radioprotective and anti-fibrotic effects.
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Affiliation(s)
- Ingunn Hanson
- Department of Physics, University of Oslo, 0371 Oslo, Norway
| | | | - Nina F J Edin
- Department of Physics, University of Oslo, 0371 Oslo, Norway
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Dahiya DS, Kichloo A, Tuma F, Albosta M, Wani F. Radiation Proctitis and Management Strategies. Clin Endosc 2021; 55:22-32. [PMID: 34788934 PMCID: PMC8831406 DOI: 10.5946/ce.2020.288] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 01/30/2021] [Indexed: 11/24/2022] Open
Abstract
Radiotherapy (RT) is a treatment modality that uses high-energy rays or radioactive agents to generate ionizing radiation against rapidly dividing cells. The main objective of using radiation in cancer therapy is to impair or halt the division of the tumor cells. Over the past few decades, advancements in technology, the introduction of newer methods of RT, and a better understanding of the pathophysiology of cancers have enabled physicians to deliver doses of radiation that match the exact dimensions of the tumor for greater efficacy, with minimal exposure of the surrounding tissues. However, RT has numerous complications, the most common being radiation proctitis (RP). It is characterized by damage to the rectal epithelium by secondary ionizing radiation. Based on the onset of signs and symptoms, post-radiotherapy RP can be classified as acute or chronic, each with varying levels of severity and complication rates. The treatment options available for RP are limited, with most of the data on treatment available from case reports or small studies. Here, we describe the types of RT used in modern-day medicine and radiation-mediated tissue injury. We have primarily focused on the classification, epidemiology, pathogenesis, clinical features, treatment strategies, complications, and prognosis of RP.
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Affiliation(s)
| | - Asim Kichloo
- Department of Internal Medicine, Central Michigan University, Saginaw, MI, USA.,Department of Internal Medicine, Samaritan Medical Center, Watertown, NY, USA
| | - Faiz Tuma
- Department of Surgery, Central Michigan University, Saginaw, MI, USA
| | - Michael Albosta
- Department of Internal Medicine, Central Michigan University, Saginaw, MI, USA
| | - Farah Wani
- Department of Family Medicine, Samaritan Medical Center, Watertown, NY, USA
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Wang X, Zhang B, He Q, Kong Y, Dai Z, Meng H, Huang F, Zhang S, Zhu Y, Tan X, Zhen X. Rectum Protection by Rectal Gel Injection in Cervical Cancer Brachytherapy: A Dosimetric Study via Deformable Surface Dose Accumulation and Machine-Learning-Based Discriminative Modeling. Front Oncol 2021; 11:657208. [PMID: 33937068 PMCID: PMC8085420 DOI: 10.3389/fonc.2021.657208] [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: 01/22/2021] [Accepted: 03/29/2021] [Indexed: 11/13/2022] Open
Abstract
Purpose This retrospective study aimed to evaluate the dosimetric effects of a rectal insertion of Kushen Ningjiao on rectal protection using deformable dose accumulation and machine learning–based discriminative modelling. Materials and Methods Sixty-two patients with cervical cancer enrolled in a clinical trial, who received a Kushen Ningjiao injection of 20 g into their rectum for rectal protection via high–dose rate brachytherapy (HDR-BT, 6 Gy/f), were studied. The cumulative equivalent 2-Gy fractional rectal surface dose was deformably summed using an in-house-developed topography-preserved point-matching deformable image registration method. The cumulative three-dimensional (3D) dose was flattened and mapped to a two-dimensional (2D) plane to obtain the rectal surface dose map (RSDM). For analysis, the rectal dose (RD) was further subdivided as follows: whole, anterior, and posterior 3D-RD and 2D-RSDM. The dose–volume parameters (DVPs) were extracted from the 3D-RD, while the dose geometric parameters (DGPs) and textures were extracted from the 2D-RSDM. These features were fed into 192 classification models (built with 8 classifiers and 24 feature selection methods) for discriminating the dose distributions between pre-Kushen Ningjiao and pro-Kushen Ningjiao. Results The rectal insertion of Kushen Ningjiao dialated the rectum in the ambilateral direction, with the rectal column increased from pre-KN 15 cm3 to post-KN 18 cm3 (P < 0.001). The characteristics of DGPs accounted for the largest portions of the top-ranked features. The top-ranked dosimetric features extracted from the posterior rectum were more reliable indicators of the dosimetric effects/changes introduced by the rectal insertion of Kushen Ningjiao. A significant dosimetric impact was found on the dose–volume parameters D1.0cc–D2.5cc extracted on the posterior rectal wall. Conclusions The rectal insertion of Kushen Ningjiao incurs significant dosimetric changes on the posterior rectal wall. Whether this effect is eventually translated into clinical gains requires further long-term follow-up and more clinical data for confirmation.
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Affiliation(s)
- Xuetao Wang
- Radiation Oncology Department, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Bailin Zhang
- Radiation Oncology Department, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Qiang He
- Radiation Oncology Department, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yilin Kong
- Radiation Oncology Department, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Zhenhui Dai
- Radiation Oncology Department, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Haoyu Meng
- Radiation Oncology Department, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Fangjun Huang
- School of Biomedical Engineering, Southern Medical University, Guangzhou, China
| | - Shengfeng Zhang
- Radiation Oncology Department, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yuanhu Zhu
- Radiation Oncology Department, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xiang Tan
- Radiation Oncology Department, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xin Zhen
- School of Biomedical Engineering, Southern Medical University, Guangzhou, China
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Patel P, Malipatlolla DK, Devarakonda S, Bull C, Rascón A, Nyman M, Stringer A, Tremaroli V, Steineck G, Sjöberg F. Dietary Oat Bran Reduces Systemic Inflammation in Mice Subjected to Pelvic Irradiation. Nutrients 2020; 12:nu12082172. [PMID: 32707913 PMCID: PMC7468988 DOI: 10.3390/nu12082172] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Revised: 07/10/2020] [Accepted: 07/18/2020] [Indexed: 12/14/2022] Open
Abstract
Patients undergoing radiotherapy to treat pelvic-organ cancer are commonly advised to follow a restricted fiber diet. However, reducing dietary fiber may promote gastrointestinal inflammation, eventually leading to deteriorated intestinal health. The goal of this study was to evaluate the influence of dietary fiber on radiation-induced inflammation. C57BL/6J male mice were fed a High-oat bran diet (15% fiber) or a No-fiber diet (0% fiber) and were either irradiated (32 Gy delivered in four fractions) to the colorectal region or only sedated (controls). The dietary intervention started at 2 weeks before irradiation and lasted for 1, 6, and 18 weeks after irradiation, at which time points mice were sacrificed and their serum samples were assayed for 23 cytokines and chemokines. Our analyses show that irradiation increased the serum cytokine levels at all the time points analyzed. The No-fiber irradiated mice had significantly higher levels of pro-inflammatory cytokines than the High-oat irradiated mice at all time points. The results indicate that a fiber-rich oat bran diet reduces the intensity of radiation-induced inflammation, both at an early and late stage. Based on the results, it seems that the advice to follow a low-fiber diet during radiotherapy may increase the risk of decreased intestinal health in cancer survivors.
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Affiliation(s)
- Piyush Patel
- Division of Clinical Cancer Epidemiology, Department of Oncology, Institute of Clinical Sciences, The Sahlgrenska Academy, University of Gothenburg, 41345 Gothenburg, Sweden; (D.K.M.); (S.D.); (C.B.); (G.S.); (F.S.)
- Department of Infectious Diseases, Institute of Biomedicine, the Sahlgrenska Academy, University of Gothenburg, 41346 Gothenburg, Sweden
- Correspondence:
| | - Dilip Kumar Malipatlolla
- Division of Clinical Cancer Epidemiology, Department of Oncology, Institute of Clinical Sciences, The Sahlgrenska Academy, University of Gothenburg, 41345 Gothenburg, Sweden; (D.K.M.); (S.D.); (C.B.); (G.S.); (F.S.)
| | - Sravani Devarakonda
- Division of Clinical Cancer Epidemiology, Department of Oncology, Institute of Clinical Sciences, The Sahlgrenska Academy, University of Gothenburg, 41345 Gothenburg, Sweden; (D.K.M.); (S.D.); (C.B.); (G.S.); (F.S.)
| | - Cecilia Bull
- Division of Clinical Cancer Epidemiology, Department of Oncology, Institute of Clinical Sciences, The Sahlgrenska Academy, University of Gothenburg, 41345 Gothenburg, Sweden; (D.K.M.); (S.D.); (C.B.); (G.S.); (F.S.)
| | - Ana Rascón
- Department of Food Technology, Engineering and Nutrition, Lund University, 22100 Lund, Sweden; (A.R.); (M.N.)
| | - Margareta Nyman
- Department of Food Technology, Engineering and Nutrition, Lund University, 22100 Lund, Sweden; (A.R.); (M.N.)
| | - Andrea Stringer
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide SA 5001, Australia;
| | - Valentina Tremaroli
- The Wallenberg Laboratory, Department of Molecular and Clinical Medicine, the Sahlgrenska Academy, University of Gothenburg, 413 45 Gothenburg, Sweden;
| | - Gunnar Steineck
- Division of Clinical Cancer Epidemiology, Department of Oncology, Institute of Clinical Sciences, The Sahlgrenska Academy, University of Gothenburg, 41345 Gothenburg, Sweden; (D.K.M.); (S.D.); (C.B.); (G.S.); (F.S.)
| | - Fei Sjöberg
- Division of Clinical Cancer Epidemiology, Department of Oncology, Institute of Clinical Sciences, The Sahlgrenska Academy, University of Gothenburg, 41345 Gothenburg, Sweden; (D.K.M.); (S.D.); (C.B.); (G.S.); (F.S.)
- Department of Infectious Diseases, Institute of Biomedicine, the Sahlgrenska Academy, University of Gothenburg, 41346 Gothenburg, Sweden
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5
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Radwan RR, Karam HM. Resveratrol attenuates intestinal injury in irradiated rats via PI3K/Akt/mTOR signaling pathway. ENVIRONMENTAL TOXICOLOGY 2020; 35:223-230. [PMID: 31633274 DOI: 10.1002/tox.22859] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 07/08/2019] [Accepted: 10/02/2019] [Indexed: 06/10/2023]
Abstract
Radiation-induced enteritis is one of the greatest challenges in radiotherapy. The current study was designed to evaluate the ameliorative effect of resveratrol, which exhibits anti-inflammatory property, against radiation-induced intestinal injury in rats and to explore the underlying mechanism. Rats were exposed to a single dose of 5 Gy. Resveratrol (20 mg/kg/day) was orally administered to irradiated rats over 3 weeks. Results showed that resveratrol ameliorated the intestinal oxidative stress parameters; malondialdehyde (MDA) content, glutathione (GSH) level, and catalase (CAT) activity compared to irradiated group. Furthermore, resveratrol reduced the contents of inflammatory cytokines; tumor necrosis factor α (TNF-α), nuclear factor-kappa (NF-κB), and interleukin 1β (IL-1β) in intestine. Western blotting analysis revealed that resveratrol down-regulated the proteins expression of phosphoinositide 3-kinases (PI3K), protein kinase B (Akt) as well as the mammalian target of rapamycin (mTOR) in intestinal tissues of irradiated rats and thus reduced the inflammatory mediator production. These results were confirmed by histopathological investigation. In conclusion, resveratrol attenuated intestinal inflammation following irradiation via modulating PI3K/Akt/mTOR pathway and thereby could be a promising adjuvant in radiotherapy.
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Affiliation(s)
- Rasha R Radwan
- Drug Radiation Research Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
| | - Heba M Karam
- Drug Radiation Research Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
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Li X, Xiao C, Kong Y, Guo W, Zhan W, Li G, Wang X, Zhang B, Gao L. Rectal wall dose-volume effect of pre- or post KUSHEN Ningjiaos relationship with 3D brachytherapy in cervical cancer patients. Radiat Oncol 2019; 14:149. [PMID: 31429773 PMCID: PMC6700783 DOI: 10.1186/s13014-019-1354-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Accepted: 08/05/2019] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND The present prospective study evaluated the safety and efficacy of the rectum following KUSHEN Ningjiaos in cervical cancer. We compared rectal wall changes during brachytherapy with or without KUSHEN Ningjiaos in cervical cancer patients and analyzed the difference in spatial dose distribution, including whole rectum-wall (R-w), anterior rectum-wall (R-a) and posterior rectum-wall (R-p). METHODS AND MATERIALS One hundred cervical cancer patients with and without KUSHEN Ningjiaos were treated with brachytherapy (600 cGy). The whole R-w was divided into two areas of R-a and R-p, and R-w dose surface map were constructed. The volume of each R-w was compared in patients pre- and post-KUSHEN Ningjiaos. RESULTS When the pre- vs. post-KUSHEN groups were compared the volume of R-w increased. In the post-KUSHEN group, a significantly higher proportion of the D2cc of VR-w and VR-a compared with the pre-KUSHEN group showed that the D2ccmean increased from 532.45 cGy to 564.7 cGy and 533.51 cGy to 565.26 cGy, respectively; however, results demonstrated a decrease in the D2ccmean of R-p from 260.5 cGy to 240.0868 cGy (P < 0.05). The insertion of KUSHEN Ningjiaos resulted in a reduction of the relative volume of R-p exposed to high doses, and regressive analysis showed that the DR-p-max correlated most strongly with VR-w and D2ccR-p (P < 0.01 and P < 0.05, respectively). CONCLUSION The insertion of KUSHEN Ningjiaos can protect the rectum. KUSHEN Ningjiaos appears to be safe and well tolerated; therefore, we believe that there will be fewer adverse events after brachytherapy for patients. TRIAL REGISTRATION A multi-center, prospective clinical trial for KUSHEN Ningjiaos was inserted into rectum to reduce the rate of radiation proctitis in three-dimensional brachytherapy of cervical cancer. ChiCTR1900021631 . 2 Mar 2019-Retrospectively registered.
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Affiliation(s)
- Xiaojuan Li
- Graduate student of grade 2016, Guangzhou University of Chinese Medicine, No.232, Waihuandong Road, University Town, Panyu District, Guangzhou, Guangdong, China
| | - Cheng Xiao
- Graduate student of grade 2016, Guangzhou University of Chinese Medicine, No.232, Waihuandong Road, University Town, Panyu District, Guangzhou, Guangdong, China
| | - Yilin Kong
- Radiation Oncology Department, Guangzhou University of Chinese Medicine Second Affiliated Hospital (Guangdong Provincial Hosiptal of Chinese Medicine), No. 55, Neihuanxi Road, University Town, Panyu District, Guangzhou, Guangdong, China
| | - Weiwei Guo
- Radiation Oncology Department, Guangzhou University of Chinese Medicine Second Affiliated Hospital (Guangdong Provincial Hosiptal of Chinese Medicine), No. 55, Neihuanxi Road, University Town, Panyu District, Guangzhou, Guangdong, China
| | - Wenting Zhan
- Radiation Oncology Department, Guangzhou University of Chinese Medicine Second Affiliated Hospital (Guangdong Provincial Hosiptal of Chinese Medicine), No. 55, Neihuanxi Road, University Town, Panyu District, Guangzhou, Guangdong, China
| | - Gong Li
- Radiation Oncology Department, Guangzhou University of Chinese Medicine Second Affiliated Hospital (Guangdong Provincial Hosiptal of Chinese Medicine), No. 55, Neihuanxi Road, University Town, Panyu District, Guangzhou, Guangdong, China
| | - Xuetao Wang
- Radiation Therapy Department, Guangzhou University of Chinese Medicine Second Affiliated Hospital (Guangdong Provincial Hosiptal of Chinese Medicine), No.55, Neihuanxi Road, University Town, Panyu District, Guangzhou, Guangdong, China
| | - Bailin Zhang
- Radiation Therapy Department, Guangzhou University of Chinese Medicine Second Affiliated Hospital (Guangdong Provincial Hosiptal of Chinese Medicine), No.55, Neihuanxi Road, University Town, Panyu District, Guangzhou, Guangdong, China
| | - Lei Gao
- Radiation Oncology Department, Guangzhou University of Chinese Medicine Second Affiliated Hospital (Guangdong Provincial Hosiptal of Chinese Medicine), No. 55, Neihuanxi Road, University Town, Panyu District, Guangzhou, Guangdong, China.
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Yavuz E, Ercan G, Karagulle OO, Bayrak BY, Biricik A, Ercetin C, Gokcek B, Yigitbas H, Kusaslan R, Celik A, Gulcicek OB. Evaluation of prophylactic and therapeutic effects of sildenafil on acute radiation proctitis in rats. Acta Cir Bras 2018; 33:362-374. [DOI: 10.1590/s0102-865020180040000008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Accepted: 05/20/2018] [Indexed: 01/27/2023] Open
Affiliation(s)
- Erkan Yavuz
- University of Health Science Bagcilar Training and Research Hospital, Turkey
| | - Gulcin Ercan
- University of Health Science Bagcilar Training and Research Hospital, Turkey
| | | | | | - Aytac Biricik
- University of Health Science Bagcilar Training and Research Hospital, Turkey
| | - Candas Ercetin
- University of Health Science Bagcilar Training and Research Hospital, Turkey
| | - Berk Gokcek
- University of Health Science Okmeydanı Training and Research Hospital, Turkey
| | - Hakan Yigitbas
- University of Health Science Bagcilar Training and Research Hospital, Turkey
| | - Ramazan Kusaslan
- University of Health Science Bagcilar Training and Research Hospital, Turkey
| | - Atilla Celik
- University of Health Science Bagcilar Training and Research Hospital, Turkey
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8
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Yavuz E, Karagulle OO, Ercan G, Celik A, Yigitbas H, Bayrak BY, Tartar R, Kusaslan R, Altinel Y, Gulcicek OB. Evaluation of prophylactic and therapeutic effects of ruscogenin on acute radiation proctitis: an experimental rat model. Ann Surg Treat Res 2018; 94:174-182. [PMID: 29629351 PMCID: PMC5880974 DOI: 10.4174/astr.2018.94.4.174] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 08/22/2017] [Accepted: 08/26/2017] [Indexed: 01/27/2023] Open
Abstract
Purpose Radiation proctitis (RP) is inflammation and damage to the rectum, manifested secondary to ionizing radiation utilized for treatment. In this study, we evaluated the anti-inflammatory therapeutical and protective effects of ruscogenin in a model of acute RP. Methods Thirty-two Sprague-Dawley rats were divided into 4 groups (n = 8) as sham, control, treatment, and prophylaxis groups. Prophylaxis group and treatment group were dosed ruscogenin by oral gavage for 14 days pre- and postradiation. At the end of the 28th day, all subjects were sacrificed. Results Histopathological analysis showed a significant increase in cryptitis abscess, cryptitis and reactive atypia, and depth of lymphocytic infiltration of the control group, compared to the other groups (P < 0.05), while treatment and prophylaxis groups showed significant decreases (P < 0.05). Immunohistochemical analysis indicated that immunoreactivity were significantly higher in control group (P < 0.05, P < 0.001, and P < 0.01, respectively), but vice versa for treatment and prophylaxis groups. There was not any significant difference for fibroblast growth factor 2 immunoreactivity. The epithelium of control rectums indicated an increase in TNF-α immunoreactivity while other groups had significant decrease (P < 0.01). Electron microscopical findings were parallel to light microscopy. Conclusion In this study, ruscogenin was observed to be effective on prophylaxis or treatment of acute RP. Although there are various reports on the treatment of the rectum damaged by acute RP in the literature, this could be the first study since there is no research indicating the ultrastructural effect of ruscogenin.
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Affiliation(s)
- Erkan Yavuz
- Department of General Surgery, Istanbul Bagcilar Training and Research Hospital, Istanbul, Turkey
| | - Onur Olgac Karagulle
- Department of General Surgery, Istanbul Bagcilar Training and Research Hospital, Istanbul, Turkey
| | - Gulcin Ercan
- Department of General Surgery, Istanbul Bagcilar Training and Research Hospital, Istanbul, Turkey
| | - Atilla Celik
- Department of General Surgery, Istanbul Bagcilar Training and Research Hospital, Istanbul, Turkey
| | - Hakan Yigitbas
- Department of General Surgery, Istanbul Bagcilar Training and Research Hospital, Istanbul, Turkey
| | - Busra Yaprak Bayrak
- Department of Pathology, Kocaeli Derince Training and Research Hospital, Kocaeli, Turkey
| | - Rumeysa Tartar
- Department of General Surgery, Istanbul Bagcilar Training and Research Hospital, Istanbul, Turkey
| | - Ramazan Kusaslan
- Department of General Surgery, Istanbul Bagcilar Training and Research Hospital, Istanbul, Turkey
| | - Yuksel Altinel
- Department of General Surgery, Istanbul Bagcilar Training and Research Hospital, Istanbul, Turkey
| | - Osman Bilgin Gulcicek
- Department of General Surgery, Istanbul Bagcilar Training and Research Hospital, Istanbul, Turkey
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Najafi M, Motevaseli E, Shirazi A, Geraily G, Rezaeyan A, Norouzi F, Rezapoor S, Abdollahi H. Mechanisms of inflammatory responses to radiation and normal tissues toxicity: clinical implications. Int J Radiat Biol 2018; 94:335-356. [DOI: 10.1080/09553002.2018.1440092] [Citation(s) in RCA: 95] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Masoud Najafi
- Radiology and Nuclear Medicine Department, School of Paramedical Sciences, Kermanshah University of Medical Science, Kermanshah, Iran
| | - Elahe Motevaseli
- Department of Molecular Medicine, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Alireza Shirazi
- Department of Medical Physics and Biomedical Engineering, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Ghazale Geraily
- Department of Medical Physics and Biomedical Engineering, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Abolhasan Rezaeyan
- Department of Medical Physics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Farzad Norouzi
- Science and Research Branch, Azad University, Tehran, Iran
| | - Saeed Rezapoor
- Department of Radiology, Faculty of Paramedical Sciences, Tehran University of Medical Sciences, Tehran, Iran
| | - Hamid Abdollahi
- Department of Medical Physics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
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Liu Q, Sun Y, Lv Y, Le Z, Xin Y, Zhang P, Liu Y. TERT alleviates irradiation-induced late rectal injury by reducing hypoxia-induced ROS levels through the activation of NF-κB and autophagy. Int J Mol Med 2016; 38:785-93. [PMID: 27431814 PMCID: PMC4990283 DOI: 10.3892/ijmm.2016.2673] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Accepted: 06/28/2016] [Indexed: 12/11/2022] Open
Abstract
The hypoxic microenvironment which is present following irradiation has been proven to promote radiation-induced injury to normal tissues. Previous studies have demonstrated that telomerase reverse transcriptase (TERT) is regulated by hypoxia, and that it plays a protective role in the process of wound repair. However, its effects on radiation-induced injury remain unclear. In this study, we examined the effects of human TERT on irradiation-induced late rectal injury in fibroblasts under hypoxic conditions. We also performed in vivo experiments. The rectums of 5-week-old female C57BL/6N mice were irradiated locally with a single dose of 25 Gy. We then examined the fibrotic changes using hematoxylin and eosin staining, and Masson's staining. The expression of hypoxia inducible factor-1α (HIF-1α) and TERT was analyzed by immunohistochemistry. In in vitro experiments, apoptosis, reactive oxygen species (ROS) production and the autophagy level induced by exposure to hypoxia were assayed in fibroblasts. The association between TERT, nuclear factor-κB (NF-κB) and the autophagy level was examined by western blot analysis. The antioxidant effects of TERT were examined on the basis of the ratio of glutathione to glutathione disulfide (GSH/GSSG) and mitochondrial membrane potential. Rectal fibrosis was induced significantly at 12 weeks following irradiation. The HIF-1α and TERT expression levels increased in the fibrotic region. The TERT-overexpressing fibroblasts (transfected with an hTERT-expressing lentiviral vector) exhibited reduced apoptosis, reduced ROS production, a higher autophagy level, a higher GSH/GSSG ratio and stable mitochondrial membrane potential compared with the fibroblasts in which TERT had been silenced by siRNA. NF-κB was activated by TERT, and the inhibition of TERT reduced the autophagy level in the fibroblasts. These results demonstrate that TERT decreases cellular ROS production, while maintaining mitochondrial function and protecting the cells from hypoxia-induced apoptosis, which may thus attenuate the effects of irradiation-induced hypoxia on rectal injury following irradiation.
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Affiliation(s)
- Qi Liu
- Cancer Research Institute, Fudan University Shanghai Cancer Center, Shanghai 200032, P.R. China
| | - Yong Sun
- Cancer Research Institute, Fudan University Shanghai Cancer Center, Shanghai 200032, P.R. China
| | - Yuefeng Lv
- Department of Obstetrics, Shiyan Taihe Hospital, Hubei University of Medcine, Shiyan, Hubei 442000, P.R. China
| | - Ziyu Le
- Department of Radiation Oncology, Fudan University Shanghai Cancer Center, Shanghai 200032, P.R. China
| | - Yuhu Xin
- Cancer Research Institute, Fudan University Shanghai Cancer Center, Shanghai 200032, P.R. China
| | - Ping Zhang
- Cancer Research Institute, Fudan University Shanghai Cancer Center, Shanghai 200032, P.R. China
| | - Yong Liu
- Cancer Research Institute, Fudan University Shanghai Cancer Center, Shanghai 200032, P.R. China
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Grellier N, Deray G, Yousfi A, Khodari W, Bouaita R, Belkacemi Y. Carence martiale fonctionnelle, inflammation et fatigue après radiothérapie. Bull Cancer 2015; 102:780-5. [DOI: 10.1016/j.bulcan.2015.06.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Accepted: 12/17/2014] [Indexed: 01/20/2023]
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12
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Pollom EL, Deng L, Pai RK, Brown JM, Giaccia A, Loo BW, Shultz DB, Le QT, Koong AC, Chang DT. Gastrointestinal Toxicities With Combined Antiangiogenic and Stereotactic Body Radiation Therapy. Int J Radiat Oncol Biol Phys 2015; 92:568-76. [PMID: 26068491 DOI: 10.1016/j.ijrobp.2015.02.016] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Revised: 02/03/2015] [Accepted: 02/09/2015] [Indexed: 12/14/2022]
Abstract
Combining the latest targeted biologic agents with the most advanced radiation technologies has been an exciting development in the treatment of cancer patients. Stereotactic body radiation therapy (SBRT) is an ablative radiation approach that has become established for the treatment of a variety of malignancies, and it has been increasingly used in combination with biologic agents, including those targeting angiogenesis-specific pathways. Multiple reports have emerged describing unanticipated toxicities arising from the combination of SBRT and angiogenesis-targeting agents, particularly of late luminal gastrointestinal toxicities. In this review, we summarize the literature describing these toxicities, explore the biological mechanism of action of toxicity with the combined use of antiangiogenic therapies, and discuss areas of future research, so that this combination of treatment modalities can continue to be used in broader clinical contexts.
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Affiliation(s)
- Erqi L Pollom
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, California
| | - Lei Deng
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, California
| | - Reetesh K Pai
- Department of Pathology, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
| | - J Martin Brown
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, California
| | - Amato Giaccia
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, California
| | - Billy W Loo
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, California
| | - David B Shultz
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, California
| | - Quynh Thu Le
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, California
| | - Albert C Koong
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, California
| | - Daniel T Chang
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, California.
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Abstract
Radiation therapy is a widely utilized treatment modality for pelvic malignancies, including prostate cancer, rectal cancer, and cervical cancer. Given its fixed position in the pelvis, the rectum is at a high risk for injury secondary to ionizing radiation. Despite advances made in radiation science, up to 75% of the patients will suffer from acute radiation proctitis and up to 20% may experience chronic symptoms. Symptoms can be variable and include diarrhea, bleeding, incontinence, and fistulization. A multitude of treatment options exist. This article summarizes the latest knowledge relating to radiation proctopathy focusing on the vast array of treatment options.
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Affiliation(s)
- Marc B. Grodsky
- Section of Colon and Rectal Surgery, MedStar Washington Hospital Center, Washington, District of Columbia
| | - Shafik M. Sidani
- Department of Colorectal Surgery, Virginia Hospital Center Physician Group, Arlington, Virginia
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Kim KO, Park H, Chun M, Kim HS. Immunomodulatory effects of high-protein diet with resveratrol supplementation on radiation-induced acute-phase inflammation in rats. J Med Food 2014; 17:963-71. [PMID: 25054274 DOI: 10.1089/jmf.2013.2976] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
We hypothesized that a high-protein diet and/or resveratrol supplementation will improve acute inflammatory responses in rats after receiving experimental abdominal radiation treatment (ART). Based on our previous study, the period of 10 days after ART was used as an acute inflammation model. Rats were exposed to a radiation dose of 17.5 Gy and were supplied with a control (C), 30% high-protein diet (HP), resveratrol supplementation (RES), or HP with RES diet ([HP+RES]). At day 10 after ART, we measured profiles of lipids, proteins, and immune cells in blood. The levels of clusters of differentiating 4(+) (CD4(+)) cells and regulatory T cells, serum proinflammatory cytokines, and 8-hydroxy-2'-deoxyguanosine (8-OHdG) in urine were also measured. ART caused significant disturbances of lipid profiles by increasing triglyceride (TG) and low-density lipoprotein cholesterol (LDL-C), and decreasing high-density lipoprotein cholesterol. The proinflammatroy cytokine levels were also increased by ART. All the experimental diets (HP, RES, and [HP+RES]) significantly decreased levels of TG, monocytes, proinflammatory cytokines, and 8-OHdG, whereas the platelet counts were increased. In addition, the HP and [HP+RES] diets decreased the concentrations of plasma LDL-C and total cholesterol. Also, the HP and RES diets decreased regulatory T cells compared with those of the control diet in ART group. Further, the HP diet led to a significant recovery of white blood cell counts, as well as increased percentages of lymphocyte and decreased percentages of neutrophils. In summary, RES appeared to be significantly effective in minimizing radiation-induced damage to lipid metabolism and immune responses. Our study also demonstrated the importance of dietary protein intake in recovering from acute inflammation by radiation.
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Affiliation(s)
- Kyoung-Ok Kim
- 1 Division of Food and Nutritional Science & Life Systems, Sookmyung Women's University , Seoul, Korea
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15
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Mancini ML, Sonis ST. Mechanisms of cellular fibrosis associated with cancer regimen-related toxicities. Front Pharmacol 2014; 5:51. [PMID: 24734020 PMCID: PMC3973915 DOI: 10.3389/fphar.2014.00051] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Accepted: 03/09/2014] [Indexed: 11/26/2022] Open
Abstract
Fibrosis is a common, persistent and potentially debilitating complication of chemotherapy and radiation regimens used for the treatment of cancer. The molecular mechanisms underlying fibrosis have been well studied and reveal overall processes that are largely ubiquitous. However, it is important to note that although the processes are similar, they result in cellular phenotypes that are highly tissue specific. These tissue specific differences may present opportunities for therapeutic interventions to prevent or treat this often irreversible condition. Data generated from animal models of cancer therapy-related tissue toxicities have revealed that the signaling pathways involved in fibrosis are the same as those involved in the normal injury response and include the transforming growth factor β superfamily and a range of pro-inflammatory cytokines. The critical difference between normal wound healing and fibrosis development appears to be, that in fibrosis, these signaling pathways escape normal cellular regulation. As a result, an injury state is maintained and processes involved in normal healing are usurped. There are a few, if any, therapeutics that effectively prevent or treat fibrosis in patients. Consequently, cancer survivors may be chronically plagued with a variety of life-altering fibrosis-related symptoms. Uncovering the signaling pathways that drive cellular fibrosis is paramount to the development of specific therapeutics that will mitigate this potentially devastating condition.
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Siva S, MacManus MP, Martin RF, Martin OA. Abscopal effects of radiation therapy: a clinical review for the radiobiologist. Cancer Lett 2013; 356:82-90. [PMID: 24125863 DOI: 10.1016/j.canlet.2013.09.018] [Citation(s) in RCA: 306] [Impact Index Per Article: 27.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2013] [Revised: 08/23/2013] [Accepted: 09/14/2013] [Indexed: 12/16/2022]
Abstract
An "abscopal" effect occurs when localized irradiation perturbs the organism as a whole, with consequences that can be either beneficial or detrimental. Mechanistic explanations of this effect are challenging. From the oncologist's perspective, the term refers to distant tumor regression after localized irradiation. On the other hand, from a biologist's point of view, abscopal effects include induction of genomic instability, cell death, and oncogenic transformation in normal tissues. This conceptual dichotomy is explored in this review, with a focus on clinically documented cases of anti-tumor abscopal effects and abscopal effects in normal tissues. This review also outlines several suggested mechanisms for abscopal effects.
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Affiliation(s)
- Shankar Siva
- Division of Radiation Oncology and Cancer Imaging, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia; Sir Peter MacCallum Department of Oncology, The University of Melbourne, Melbourne, VIC, Australia.
| | - Michael P MacManus
- Division of Radiation Oncology and Cancer Imaging, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia; Sir Peter MacCallum Department of Oncology, The University of Melbourne, Melbourne, VIC, Australia
| | - Roger F Martin
- Sir Peter MacCallum Department of Oncology, The University of Melbourne, Melbourne, VIC, Australia; Molecular Radiation Biology Laboratory, Research Division, Peter MacCallum Cancer Centre, The University of Melbourne, VIC, Australia
| | - Olga A Martin
- Division of Radiation Oncology and Cancer Imaging, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia; Sir Peter MacCallum Department of Oncology, The University of Melbourne, Melbourne, VIC, Australia; Molecular Radiation Biology Laboratory, Research Division, Peter MacCallum Cancer Centre, The University of Melbourne, VIC, Australia.
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17
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Sprung CN, Ivashkevich A, Forrester HB, Redon CE, Georgakilas A, Martin OA. Oxidative DNA damage caused by inflammation may link to stress-induced non-targeted effects. Cancer Lett 2013; 356:72-81. [PMID: 24041866 DOI: 10.1016/j.canlet.2013.09.008] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2013] [Revised: 08/30/2013] [Accepted: 09/08/2013] [Indexed: 12/25/2022]
Abstract
A spectrum of radiation-induced non-targeted effects has been reported during the last two decades since Nagasawa and Little first described a phenomenon in cultured cells that was later called the "bystander effect". These non-targeted effects include radiotherapy-related abscopal effects, where changes in organs or tissues occur distant from the irradiated region. The spectrum of non-targeted effects continue to broaden over time and now embrace many types of exogenous and endogenous stressors that induce a systemic genotoxic response including a widely studied tumor microenvironment. Here we discuss processes and factors leading to DNA damage induction in non-targeted cells and tissues and highlight similarities in the regulation of systemic effects caused by different stressors.
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Affiliation(s)
- Carl N Sprung
- Centre for Innate Immunity and Infectious Diseases, Monash Institute of Medical Research, Monash University, Clayton, Victoria, Australia.
| | - Alesia Ivashkevich
- Centre for Innate Immunity and Infectious Diseases, Monash Institute of Medical Research, Monash University, Clayton, Victoria, Australia
| | - Helen B Forrester
- Centre for Innate Immunity and Infectious Diseases, Monash Institute of Medical Research, Monash University, Clayton, Victoria, Australia
| | - Christophe E Redon
- Laboratory of Molecular Pharmacology, Center for Cancer Research, National Cancer Institute, Bethesda, MD, USA
| | - Alexandros Georgakilas
- Department of Physics, School of Applied Mathematical and Physical Sciences, National Technical University of Athens, Zografou Campus, Athens, Greece
| | - Olga A Martin
- Department of Radiation Oncology, Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia; Molecular Radiation Biology Laboratory, Peter MacCallum Cancer Centre and the University of Melbourne, Victoria, Australia; Sir Peter MacCallum Department of Oncology, The University of Melbourne, Melbourne, Victoria, Australia
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18
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Valdagni R, Vavassori V, Rancati T, Fellin G, Baccolini M, Bianchi C, Cagna E, Gabriele P, Mauro F, Menegotti L, Monti AF, Stasi M, Fiorino C. Increasing the risk of late rectal bleeding after high-dose radiotherapy for prostate cancer: The case of previous abdominal surgery. Results from a prospective trial. Radiother Oncol 2012; 103:252-5. [DOI: 10.1016/j.radonc.2012.03.012] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2010] [Revised: 03/23/2012] [Accepted: 03/26/2012] [Indexed: 11/25/2022]
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Response patterns of cytokines/chemokines in two murine strains after irradiation. Cytokine 2012; 58:169-77. [PMID: 22277799 DOI: 10.1016/j.cyto.2011.12.023] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2011] [Revised: 11/17/2011] [Accepted: 12/22/2011] [Indexed: 11/23/2022]
Abstract
PURPOSE To determine the plasma concentrations of acute responding cytokines/chemokines following 9-Gy ionizing radiation in C57BL/6 (radiation tolerant) and C3H/HeN (radiation sensitive) murine strains. METHODS AND MATERIALS Mice (5/group) received 9-Gy total body irradiation (TBI), and the plasma from each mouse was collected at 6h or 1, 2, 4, or 10 days after TBI. A multiplex bead array was used to assess the levels of 32 cytokines/chemokines in plasma to determine their common and strain-specific temporal responses. RESULTS The plasma levels of five cytokines/chemokines (Axl, FasL, ICAM-1, TARC, and TSLP) were beyond the detectable level. Five (VEGF, IL-2, IL-5, IL-17, and CD30) were unaffected by irradiation in either strain. Temporal patterns were similar in both murine strains for 10 of the cytokines tested, including G-CSF, IL-6, TCA-3, MCP-1, MIP-1γ, KC, CXCL 13, CXCL 16, MDC, and TIMP-1; the other 12 molecules (GM-CSF, IL-3, SCF, IL-1β, IL-4, IL-10, IL-12p70, MIP-1α, Eotaxin, TNF-α, sTNF-R1, and CD40) showed strain-specific response patterns. While a number of cytokines had temporal response patterns following TBI, the strains exhibited quantitatively different results. CONCLUSIONS The levels of 27 of the 32 plasma cytokines measured indicate the following: (1) different cytokine concentrations and temporal patterns in the two strains may partly explain different radiation sensitivities and sequelae following irradiation; (2) many of the cytokines/chemokines exhibit similar temporal responses in the two strains. These responses suggest the potential value of using a panel of cytokine/chemokine temporal patterns for radiation dosimetry. Although radiation doses will be difficult to quantitate due to the large variation in levels and temporal responses exhibited in the two murine strains, serial measurements of cytokines might help identify subjects exposed to radiation.
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20
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Gallet P, Phulpin B, Merlin JL, Leroux A, Bravetti P, Mecellem H, Tran N, Dolivet G. Long-term alterations of cytokines and growth factors expression in irradiated tissues and relation with histological severity scoring. PLoS One 2011; 6:e29399. [PMID: 22216271 PMCID: PMC3245280 DOI: 10.1371/journal.pone.0029399] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2011] [Accepted: 11/28/2011] [Indexed: 02/06/2023] Open
Abstract
Purpose Beside its efficacy in cancer treatment, radiotherapy induces degeneration of healthy tissues within the irradiated area. The aim of this study was to analyze the variations of proinflammatory (IL-1α, IL-2, IL-6, TNF-α, IFN-γ), profibrotic (TGF-β1), proangiogneic (VEGF) and stem cell mobilizing (GM-CSF) cytokines and growth factors in an animal model of radiation-induced tissue degeneration. Materials and Methods 24 rats were irradiated unilaterally on the hindlimb at a monodose of 30 Gy. Six weeks (n = 8), 6 months (n = 8) and 1 year (n = 8) after irradiation the mediators expression in skin and muscle were analyzed using Western blot and the Bio-Plex® protein array (BPA) technology. Additional histological severity for fibrosis, inflammation, vascularity and cellularity alterations scoring was defined from histology and immnunohistochemistry analyses. Results A significant increase of histological severity scoring was found in irradiated tissue. Skin tissues were more radio-sensitive than muscle. A high level of TGF-β1 expression was found throughout the study and a significant relation was evidenced between TGF-β1 expression and fibrosis scoring. Irradiated tissue showed a chronic inflammation (IL-2 and TNF-α significantly increased). Moreover a persistent expression of GM-CSF and VEGF was found in all irradiated tissues. The vascular score was related to TGF-β1 expression and the cellular alterations score was significantly related with the level of IL-2, VEGF and GM-CSF. Conclusion The results achieved in the present study underline the complexity and multiplicity of radio-induced alterations of cytokine network. It offers many perspectives of development, for the comprehension of the mechanisms of late injuries or for the histological and molecular evaluation of the mode of action and the efficacy of rehabilitation techniques.
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Affiliation(s)
- Patrice Gallet
- EA4421 SiGReTO Nancy University, Faculty of Medicine, Vandoeuvre-lès-Nancy, France
| | - Bérengère Phulpin
- EA4421 SiGReTO Nancy University, Faculty of Medicine, Vandoeuvre-lès-Nancy, France
- Head and Neck Surgery and Dental Units, Oncologic Surgery Department, Centre Alexis Vautrin, Vandoeuvre-lès-Nancy, France
- * E-mail:
| | - Jean-Louis Merlin
- EA4421 SiGReTO Nancy University, Faculty of Medicine, Vandoeuvre-lès-Nancy, France
- Pathology and Tumor Biology Department, Centre Alexis Vautrin, Vandoeuvre-lès- Nancy, France
| | - Agnès Leroux
- EA4421 SiGReTO Nancy University, Faculty of Medicine, Vandoeuvre-lès-Nancy, France
- Pathology and Tumor Biology Department, Centre Alexis Vautrin, Vandoeuvre-lès- Nancy, France
| | - Pierre Bravetti
- Oral surgery department, Faculty of Dentistry, Nancy University, Nancy, France
| | - Hinda Mecellem
- Radiotherapy Department, Centre Alexis Vautrin, Vandoeuvre-lès-Nancy, France
| | - Nguyen Tran
- School of Surgery, INSERM U961, Faculty of Medicine, Nancy University, Vandoeuvre-lès-Nancy, France
- INSERM U961, Faculty of Medicine, Nancy University, Vandoeuvre-lès-Nancy, France
| | - Gilles Dolivet
- EA4421 SiGReTO Nancy University, Faculty of Medicine, Vandoeuvre-lès-Nancy, France
- Head and Neck Surgery and Dental Units, Oncologic Surgery Department, Centre Alexis Vautrin, Vandoeuvre-lès-Nancy, France
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Zhang L, Sun W, Wang J, Zhang M, Yang S, Tian Y, Vidyasagar S, Peña LA, Zhang K, Cao Y, Yin L, Wang W, Zhang L, Schaefer KL, Saubermann LJ, Swarts SG, Fenton BM, Keng PC, Okunieff P. Mitigation effect of an FGF-2 peptide on acute gastrointestinal syndrome after high-dose ionizing radiation. Int J Radiat Oncol Biol Phys 2010; 77:261-8. [PMID: 20394858 DOI: 10.1016/j.ijrobp.2009.11.026] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2009] [Revised: 11/05/2009] [Accepted: 11/07/2009] [Indexed: 10/19/2022]
Abstract
PURPOSE Acute gastrointestinal syndrome (AGS) resulting from ionizing radiation causes death within 7 days. Currently, no satisfactory agent exists for mitigation of AGS. A peptide derived from the receptor binding domain of fibroblast growth factor 2 (FGF-P) was synthesized and its mitigation effect on AGS was examined. METHODS AND MATERIALS A subtotal body irradiation (sub-TBI) model was created to induce gastrointestinal (GI) death while avoiding bone marrow death. After 10.5 to 16 Gy sub-TBI, mice received an intramuscular injection of FGF-P (10 mg/kg/day) or saline (0.2 ml/day) for 5 days; survival (frequency and duration) was measured. Crypt cells and their proliferation were assessed by hematoxylin, eosin, and BrdU staining. In addition, GI hemoccult score, stool formation, and plasma levels of endotoxin, insulin, amylase, interleukin (IL)-6, keratinocyte-derived chemokine (KC) monocyte chemoattractant protein 1 (MCP-1) and tumor necrosis factor (TNF)-alpha were evaluated. RESULTS Treatment with FGF-P rescued a significant fraction of four strains of mice (33-50%) exposed to a lethal dose of sub-TBI. Use of FGF-P improved crypt survival and repopulation and partially preserved or restored GI function. Furthermore, whereas sub-TBI increased plasma endotoxin levels and several pro-inflammation cytokines (IL-6, KC, MCP-1, and TNF-alpha), FGF-P reduced these adverse responses. CONCLUSIONS The study data support pursuing FGF-P as a mitigator for AGS.
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Affiliation(s)
- Lurong Zhang
- Department of Radiation Oncology, University of Rochester Medical Center, Rochester, NY 14642-8647, USA
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Okunieff P, Kachnic LA, Constine LS, Fuller CD, Gaspar LE, Hayes DF, Hooks J, Ling C, Meyskens FL, Philip PA, Raben D, Smalley SR, Swanson GP, Teicher BA, Thomas CR, Vikram B, Zelefsky MJ, Baker LH. Report from the Radiation Therapy Committee of the Southwest Oncology Group (SWOG): Research Objectives Workshop 2008. Clin Cancer Res 2009; 15:5663-70. [PMID: 19723641 PMCID: PMC2978526 DOI: 10.1158/1078-0432.ccr-09-0357] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Strategic planning for the Radiation Therapy Committee of the Southwest Oncology Group (SWOG) is comprehensively evaluated every six years in an effort to maintain a current and relevant scientific focus, and to provide a standard platform for future development of protocol concepts. Participants in the 2008 Strategic Planning Workshop included clinical trial experts from multiple specialties, industry representatives from both pharmaceuticals and equipment manufacturers, and basic scientists. High-priority research areas such as image-guided radiation therapy for control of limited metastatic disease, analysis of biomarkers for treatment response and late toxicity, assessment of novel agents in combination with radiation, standardization of radiation target delineation, and the assessment of new imaging techniques to individualize cancer therapy, were discussed. Research priorities included clinical study designs featuring translational end points that identify patients most likely to benefit from combined modality therapy; intervention including combination radiation with standard chemotherapy; radiation with radiosensitizing molecular-targeted therapies; and stereotactic radiation for treatment of patients with regard to asymptomatic metastasis and radiation-induced tumor autoimmunity. The Committee concluded that the future research opportunities are among the most exciting to have developed in the last decade, and work is in progress to embark on these plans.
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Affiliation(s)
- Paul Okunieff
- University of Rochester Medical Center, Rochester, New York 14642, USA.
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Facoetti A, Mariotti L, Ballarini F, Bertolotti A, Nano R, Pasi F, Ranza E, Ottolenghi A. Experimental and theoretical analysis of cytokine release for the study of radiation-induced bystander effect. Int J Radiat Biol 2009; 85:690-9. [PMID: 19637080 DOI: 10.1080/09553000903020016] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
PURPOSE To clarify the experimental conditions that might influence the release of cytokines in the culture medium and give some basic input for building a model for cytokine (e.g., Interleukin-6, IL-6) regulation in the case of 'sham irradiation' and after ionising radiation exposure. MATERIALS AND METHODS The influence of cell type, cell density, medium volume, medium storage temperature and other methodological aspects on IL-6 and Interleukin-8 (IL-8) release were investigated. In addition, the effects over the time of different doses of gamma irradiation on the clonogenic survival of bystander cells and on the secretion of these cytokines were studied. RESULTS We observed significant decreases of clonogenic survival in AG01522 and T98G cells after the transfer of medium collected 5 and 20 h after low doses of gamma irradiation. Concerning the Interleukins' measurements, our experiments showed that the aggregate removal modalities tested, and up to 10 freeze-thaw cycles, do not have significant influence on the measurements of IL-6 concentration in the medium. We also observed that the IL-6 accumulated in the medium of human fibroblasts is not degraded when maintained at 37 degrees C. Sets of experiments demonstrated that cell density or medium volume do not influence the release of IL-6. On the contrary, our results showed that IL-8 released by glioblastoma cells strongly depends on the amount of medium. Finally, the exposure of fibroblasts to gamma irradiation has influence on the release kinetics of both IL-6 and IL-8 with peculiar features. CONCLUSIONS This study solved some of the methodological doubts concerning the study of bystander effects by means of the medium transfer technique; moreover it also highlighted some experimental aspects that need to be considered when approaching this sort of experiments.
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Affiliation(s)
- Angelica Facoetti
- Dipartimento di Fisica Nucleare e Teorica, Universita degli Studi di Pavia, Pavia, Italy.
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Abstract
Radiation colitis, an insidious, progressive disease of increasing frequency, develops 6 mo to 5 years after regional radiotherapy for malignancy, owing to the deleterious effects of the latter on the colon and the small intestine. When dealing with radiation colitis and its complications, the most conservative modality should be employed because the areas of intestinal injury do not tend to heal. Acute radiation colitis is mostly self-limited, and usually, only supportive management is required. Chronic radiation colitis, a poorly predictable progressive disease, is considered as a precancerous lesion; radiation-associated malignancy has a tendency to be diagnosed at an advanced stage and to bear a dismal prognosis. Therefore, management of chronic radiation colitis remains a major challenge owing to the progressive evolution of the disease, including development of fibrosis, endarteritis, edema, fragility, perforation, partial obstruction, and cancer. Patients are commonly managed conservatively. Surgical intervention is difficult to perform because of the extension of fibrosis and alterations in the gut and mesentery, and should be reserved for intestinal obstruction, perforation, fistulas, and severe bleeding. Owing to the difficulty in managing the complications of acute and chronic radiation colitis, particular attention should be focused onto the prevention strategies. Uncovering the fibrosis mechanisms and the molecular events underlying radiation bowel disease could lead to the introduction of new therapeutic and/or preventive approaches. A variety of novel, mostly experimental, agents have been used mainly as a prophylaxis, and improvements have been made in radiotherapy delivery, including techniques to reduce the amount of exposed intestine in the radiation field, as a critical strategy for prevention.
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Abstract
PURPOSE OF REVIEW Radiotherapy frequently results in persistent effects on gastrointestinal function adversely impacting on the quality of life of patients cured of their malignant disease. Long-term effects on gastrointestinal function remain prevalent despite the advent of three-dimensional techniques of radiotherapy because higher radiation doses and more combined modality treatments are prescribed to improve cure rates. RECENT FINDINGS Chronic elevation of cytokine levels and implication of the cyclooxygenase-2 pathway in radiation bowel injury in animals, and the involvement of the Rho/Rho kinase pathway in the fibrogenic differentiation of smooth muscle cells of patients with late radiation enteritis, suggest a role for inhibition of these pathways. The importance of limiting acute gastrointestinal toxicity by dietary, pharmacological and physical interventions and of optimizing radiotherapy techniques and prescriptions is underscored by increasing evidence that a component of the long-term effects of radiotherapy on gastrointestinal function is a consequence of acute damage. SUMMARY Strategies to control acute toxicity are important in reducing the impact of long-term effects of radiotherapy on gastrointestinal function. Further research into genetic profiling to characterize individual risk of radiation bowel damage and the pathways implicated in fibrogenic differentiation is needed to reduce and prevent bowel complications.
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Sun SP, Jin YN, Yang HP, Wei Y, Dong Z. Serum transforming growth factor-β1 level reflects disease status in patients with esophageal carcinoma after radiotherapy. World J Gastroenterol 2007; 13:5267-72. [PMID: 17876899 PMCID: PMC4171310 DOI: 10.3748/wjg.v13.i39.5267] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To evaluate the relationship between changes in serum transforming growth factor β1 (TGFβ1) level and curative effect of radiotherapy (RT) in patients with esophageal carcinoma.
METHODS: Ninety patients with histologically confirmed esophageal carcinoma were enrolled. Serum samples for TGFβ1 analysis were obtained before and at the end of RT. An enzyme-linked immunosorbent assay was used to measure serum TGFβ1 level. Multivariate analysis was performed to investigate the relationship between disease status and changes in serum TGFβ1 level.
RESULTS: Serum TGFβ1 level in patients with esophageal carcinoma before RT was significantly higher than that in healthy controls (P < 0.001). At the end of RT, serum TGFβ1 level was decreased in 67.82% (59/87) of the patients. The overall survival rate at 1, 3 and 5 years was 48.28% (42/87), 19.54% (17/87) and 12.64% (11/87), respectively. Main causes of death were local failure and regional lymph node metastasis. In patients whose serum TGFβ1 level decreased after RT, the survival rate at 1, 3 and 5 years was 61.02% (36/59), 28.81% (17/59) and 18.64% (11/59), respectively. The survival rate at 1 year was 17.86% (5/28) in patients whose serum TGFβ1 level increased after RT, and all died within 18 mo (P < 0.01).
CONCLUSION: Serum TGFβ1 level may be a useful marker for monitoring disease status after RT in patients with esophageal carcinoma.
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Affiliation(s)
- Su-Ping Sun
- Department of Radiation Oncology, Changzhou Second Hospital-Affiliated Hospital of Nanjing Medical University, Changzhou, 213003, Jiangsu Province, China.
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27
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Sowden HM, Karoo ROS, Tobin DJ. Transforming growth factor-? receptor II is preferentially expressed in the companion layer of the human anagen hair follicle. Br J Dermatol 2007; 157:161-4. [PMID: 17578439 DOI: 10.1111/j.1365-2133.2007.07925.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Transforming growth factor (TGF)-beta is a multifunctional growth factor with multiple roles in skin including hair follicle development and cycling, where it regulates cell proliferation, differentiation and apoptosis, as well as in wound healing. While TGF-beta receptor I (TGF-beta RI) and receptor II (TGF-beta RII) expression helps define early human hair follicle morphogenesis, expression in the adult human hair follicle remains to be established. OBJECTIVES To assess TGF-beta receptor expression in human scalp anagen hair follicles. METHODS Immunohistochemical and double immunofluorescence analysis of TGF-beta RI and RII was conducted on frozen sections of haired human scalp obtained from 10 healthy individuals. RESULTS TGF-beta RI expression was detected in the outer root sheath of anagen hair follicles while TGF-beta RII was expressed almost exclusively in the companion layer of inner root sheath and less so in premedulla keratinocytes. Both receptors were colocalized in the companion layer of the proximal and mid follicle. CONCLUSIONS The well-described role of TGF-beta in keratinocyte apoptosis during catagen is likely to involve anagen-specific hair follicle components including the companion layer, as this layer provides the slippage plane supporting the inner root sheath and hair shaft as they ascend to the skin surface. Results of this study suggest that the colocalization of TGF-beta RI/RII complexes at the companion layer would facilitate TGF-beta signalling at this site to regulate apoptosis of the companion layer keratinocytes, facilitating shrinkage/contraction of this cell layer during hair follicle regression/catagen.
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Affiliation(s)
- H M Sowden
- Medical Biosciences Research, School of Life Sciences, University of Bradford, Bradford BD7 1DP, U.K
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Brush J, Lipnick SL, Phillips T, Sitko J, McDonald JT, McBride WH. Molecular mechanisms of late normal tissue injury. Semin Radiat Oncol 2007; 17:121-30. [PMID: 17395042 DOI: 10.1016/j.semradonc.2006.11.008] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Irradiation perturbs the homeostatic network linking parenchymal, mesenchymal, and vascular cells within tissues. Normal communication between cells through soluble, matrix, and cell-associated ligands and receptors is altered so as to set in motion a seemingly inexorable series of events aimed at tissue regeneration and healing. In late responding normal tissues where cell death is not compensated for by rapid regeneration, this process unfortunately often culminates in symptomatic complications of radiation exposure. Cytokines and their receptors are prominent in driving the cascade of molecular responses using the balance between seemingly mutually antagonistic molecules to control and direct the healing processes. There is strong evidence from preclinical models for the importance of cytokine-driven pathways in late radiation damage and growing evidence in humans for their relevance to radiation-induced disease. This review aims to show some general aspects of the molecular torrents that drive responses in irradiated tissues before and during the development of late effects. It attempts to collate some of the findings from preclinical models of late lung, central nervous system, skin, and intestinal damage and from clinical studies in the belief that understanding how irradiation perturbs the cellular communication networks will allow rationale intervention for mitigating late radiation tissue damage and carcinogenesis.
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Affiliation(s)
- James Brush
- Roy E. Coats Laboratories, Department of Radiation Oncology, University of California at Los Angeles, Los Angeles, CA, USA
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Coderre JA, Morris GM, Micca PL, Hopewell JW, Verhagen I, Kleiboer BJ, van der Kogel AJ. Late Effects of Radiation on the Central Nervous System: Role of Vascular Endothelial Damage and Glial Stem Cell Survival. Radiat Res 2006; 166:495-503. [PMID: 16953668 DOI: 10.1667/rr3597.1] [Citation(s) in RCA: 127] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Selective irradiation of the vasculature of the rat spinal cord was used in this study, which was designed specifically to address the question as to whether it is the endothelial cell or the glial progenitor cell that is the target responsible for late white matter necrosis in the CNS. Selective irradiation of the vascular endothelium was achieved by the intraperitoneal (ip) administration of a boron compound known as BSH (Na(2)B(12)H(11)SH), followed by local irradiation with thermal neutrons. The blood-brain barrier is known to exclude BSH from the CNS parenchyma. Thirty minutes after the ip injection of BSH, the boron concentration in blood was 100 microg (10)B/ g, while that in the CNS parenchyma was below the detection limit of the boron analysis system, <1 microg (10)B/g. An ex vivo clonogenic assay of the O2A (oligodendrocyte-type 2 astrocyte) glial progenitor cell survival was performed 1 week after irradiation and at various times during the latent period before white matter necrosis in the spinal cord resulted in myelopathy. One week after 4.5 Gy of thermal neutron irradiation alone (approximately one-third of the dose required to produce a 50% incidence of radiation myelopathy), the average glial progenitor cell surviving fraction was 0.03. The surviving fraction of glial progenitor cells after a thermal neutron irradiation with BSH for a comparable effect was 0.46. The high level of glial progenitor cell survival after irradiation in the presence of BSH clearly reflects the lower dose delivered to the parenchyma due to the complete exclusion of BSH by the blood-brain barrier. The intermediate response of glial progenitor cells after irradiation with thermal neutrons in the presence of a boron compound known as BPA (p-dihydroxyboryl-phenylalanine), again for a dose that represents one-third the ED(50) for radiation-induced myelopathy, reflects the differential partition of boron-10 between blood and CNS parenchyma for this compound, which crosses the blood-brain barrier, at the time of irradiation. The large differences in glial progenitor survival seen 1 week after irradiation were also maintained during the 4-5-month latent period before the development of radiation myelopathy, due to selective white matter necrosis, after irradiation with doses that would produce a high incidence of radiation myelopathy. Glial progenitor survival was similar to control values at 100 days after irradiation with a dose of thermal neutrons in the presence of BSH, significantly greater than the ED(100), shortly before the normal time of onset of myelopathy. In contrast, glial progenitor survival was less than 1% of control levels after irradiation with 15 Gy of thermal neutrons alone. This dose of thermal neutrons represents the approximate ED(90-100) for myelopathy. The response to irradiation with an equivalent dose of X rays (ED(90): 23 Gy) was intermediate between these extremes as it was to thermal neutrons in the presence of BPA at a slightly lower dose equivalent to the approximate ED(60) for radiation myelopathy. The conclusions from these studies, performed at dose levels approximately iso-effective for radiation-induced myelopathy as a consequence of white matter necrosis, were that the large differences observed in glial progenitor survival were directly related to the dose distribution in the parenchyma. These observations clearly indicate the relative importance of the dose to the vascular endothelium as the primary event leading to white matter necrosis.
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Affiliation(s)
- Jeffrey A Coderre
- Medical Department, Brookhaven National Laboratory, Upton, NY 11973, USA
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30
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Streitparth F, Pech M, Böhmig M, Ruehl R, Peters N, Wieners G, Steinberg J, Lopez-Haenninen E, Felix R, Wust P, Ricke J. In vivo assessment of the gastric mucosal tolerance dose after single fraction, small volume irradiation of liver malignancies by computed tomography–guided, high-dose-rate brachytherapy. Int J Radiat Oncol Biol Phys 2006; 65:1479-86. [PMID: 16757131 DOI: 10.1016/j.ijrobp.2006.02.052] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2006] [Revised: 02/24/2006] [Accepted: 02/25/2006] [Indexed: 11/17/2022]
Abstract
PURPOSE The aim of this study was to assess the tolerance dose of gastric mucosa for single-fraction computed tomography (CT)-guided, high-dose-rate (HDR) brachytherapy of liver malignancies. METHODS AND MATERIALS A total of 33 patients treated by CT-guided HDR brachytherapy of liver malignancies in segments II and/or III were included. Dose planning was performed upon a three-dimensional CT data set acquired after percutaneous applicator positioning. All patients received gastric protection post-treatment. For further analysis, the contours of the gastric wall were defined in every CT slice using Brachyvision Software. Dose-volume histograms were calculated for each treatment and correlated with clinical data derived from questionnaires assessing Common Toxicity Criteria (CTC). All patients presenting symptoms of upper GI toxicity were examined endoscopically. RESULTS Summarizing all patients the minimum dose applied to 1 ml of the gastric wall (D(1 ml)) ranged from 6.3 to 34.2 Gy; median, 14.3 Gy. Toxicity was present in 18 patients (55%). We found nausea in 16 (69%), emesis in 9 (27%), cramping in 13 (39%), weight loss in 12 (36%), gastritis in 4 (12%), and ulceration in 5 patients (15%). We found a threshold dose D(1 ml) of 11 Gy for general gastric toxicity and 15.5 Gy for gastric ulceration verified by an univariate analysis (p = 0.01). CONCLUSIONS For a single fraction, small volume irradiation we found in the upper abdomen a threshold dose D(1 ml) of 15.5 Gy for the clinical endpoint ulceration of the gastric mucosa. This in vivo assessment is in accordance with previously published tolerance data.
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Affiliation(s)
- Florian Streitparth
- Department of Radiology, Charité Medical University Center, Campus Virchow Clinic, Humboldt University, Berlin, Germany
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Xiao Z, Su Y, Yang S, Yin L, Wang W, Yi Y, Fenton BM, Zhang L, Okunieff P. Protective effect of esculentoside A on radiation-induced dermatitis and fibrosis. Int J Radiat Oncol Biol Phys 2006; 65:882-9. [PMID: 16751070 DOI: 10.1016/j.ijrobp.2006.01.031] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2005] [Revised: 01/19/2006] [Accepted: 01/20/2006] [Indexed: 11/26/2022]
Abstract
PURPOSE To investigate the effect of esculentoside A (EsA) on radiation-induced cutaneous and fibrovascular toxicity and its possible molecular mechanisms, both in vivo and in vitro. METHODS AND MATERIALS Mice received drug intervention 18 hours before 30 Gy to the right hind leg. Alterations in several cytokines expressed in skin tissue 2 days after irradiation were determined by ELISA. Early skin toxicity was evaluated 3 to 4 weeks after irradiation by skin scoring, and both tissue contraction and expression of TGF-beta1 were determined for soft-tissue fibrosis 3 months after irradiation. In vitro, the effect of EsA on radiation-induced nitric oxide (NO) and cytokine production in different cell types was measured by application of 2, 4, and 8 Gy. RESULTS In vivo, EsA reduced levels of IL-1alpha, MCP-1, VEGF, and TGF-beta1 in cutaneous tissue and reduced soft-tissue toxicity. In vitro, EsA inhibited the IL-1alpha ordinarily produced after 4 Gy in A431 cells. In Raw264.7 cells, EsA reduced levels of IL-1alpha, IL-1beta, and NO production costimulated by radiation and lipopolysaccharide (LPS). In L-929 cells, EsA inhibited VEGF, TNF, and MCP-1 production at 2, 4, and 8 Gy. CONCLUSIONS Esculentoside A protects soft tissues against radiation toxicity through inhibiting the production of several proinflammatory cytokines and inflammatory mediators in epithelial cells, macrophages, fibroblasts, and skin tissue.
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Affiliation(s)
- Zhenyu Xiao
- Department of Radiation Oncology, James P. Wilmot Cancer Center at the University of Rochester Medical Center, Rochester, NY, USA
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Schuller BW, Binns PJ, Riley KJ, Ma L, Hawthorne MF, Coderre JA. Selective irradiation of the vascular endothelium has no effect on the survival of murine intestinal crypt stem cells. Proc Natl Acad Sci U S A 2006; 103:3787-92. [PMID: 16505359 PMCID: PMC1383492 DOI: 10.1073/pnas.0600133103] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The possible role of vascular endothelial cell damage in the loss of intestinal crypt stem cells and the subsequent development of the gastrointestinal (GI) syndrome is addressed. Mice received whole-body epithermal neutron irradiation at a dose rate of 0.57 +/- 0.04 Gy x min(-1). An additional dose was selectively targeted to endothelial cells from the short-ranged (5-9 microm) particles released from neutron capture reactions in 10B confined to the blood by incorporation into liposomes 70-90 nm in diameter. Different liposome formulations produced 45 +/- 7 or 118 +/- 12 microg/g 10B in the blood at the time of neutron irradiation, which resulted in total absorbed dose rates in the endothelial cells of 1.08 +/- 0.09 or 1.90 +/- 0.16 Gy x min(-1), respectively. At 3.5 d after irradiation, the intestinal crypt microcolony assay showed that the 2- to 3-fold increased doses to the microvasculature, relative to the nonspecific whole-body neutron beam doses, caused no additional crypt stem cell loss beyond that produced by the neutron beam alone. The threshold dose for death from the GI syndrome after neutron-beam-only irradiation was 9.0 +/- 0.6 Gy. There were no deaths from the GI syndrome, despite calculated absorbed doses to endothelial cells as high as 27.7 Gy, in the groups that received neutron beam doses of <9.0 Gy with boronated liposomes in the blood. These data indicate that endothelial cell damage is not causative in the loss of intestinal crypt stem cells and the eventual development of the GI syndrome.
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Affiliation(s)
| | - Peter J. Binns
- Nuclear Reactor Laboratory, Massachusetts Institute of Technology, Cambridge, MA 02139; and
| | - Kent J. Riley
- Nuclear Reactor Laboratory, Massachusetts Institute of Technology, Cambridge, MA 02139; and
| | - Ling Ma
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90024
| | - M. Frederick Hawthorne
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90024
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