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https://www.readbyqxmd.com/read/28621265/improving-radiotherapy-in-cancer-treatment-promises-and-challenges
#1
REVIEW
Helen H W Chen, Macus Tien Kuo
Effective radiotherapy for cancer has relied on the promise of maximally eradicating tumor cells while minimally killing normal cells. Technological advancement has provided state-of-the-art instrumentation that enables delivery of radiotherapy with great precision to tumor lesions with substantial reduced injury to normal tissues. Moreover, better understanding of radiobiology, particularly the mechanisms of radiation sensitivity and resistance in tumor lesions and toxicity in normal tissues, has improved the treatment efficacy of radiotherapy...
June 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/28598415/dna-exonuclease-trex1-regulates-radiotherapy-induced-tumour-immunogenicity
#2
Claire Vanpouille-Box, Amandine Alard, Molykutty J Aryankalayil, Yasmeen Sarfraz, Julie M Diamond, Robert J Schneider, Giorgio Inghirami, C Norman Coleman, Silvia C Formenti, Sandra Demaria
Radiotherapy is under investigation for its ability to enhance responses to immunotherapy. However, the mechanisms by which radiation induces anti-tumour T cells remain unclear. We show that the DNA exonuclease Trex1 is induced by radiation doses above 12-18 Gy in different cancer cells, and attenuates their immunogenicity by degrading DNA that accumulates in the cytosol upon radiation. Cytosolic DNA stimulates secretion of interferon-β by cancer cells following activation of the DNA sensor cGAS and its downstream effector STING...
June 9, 2017: Nature Communications
https://www.readbyqxmd.com/read/28597025/abscopal-effect-of-local-irradiation-treatment-for-diffuse-large-b-cell-lymphoma
#3
Yuri Hidaka, Takuya Takeichi, Yuichi Ishikawa, Mariko Kawamura, Masashi Akiyama
No abstract text is available yet for this article.
June 9, 2017: Acta Dermato-venereologica
https://www.readbyqxmd.com/read/28592116/radionuclides-in-radiation-induced-bystander-effect-may-it-share-in-radionuclide-therapy
#4
M Widel
For many years in radiobiology and radiotherapy predominated the conviction that cellular DNA is the main target for ionizing radiation, however, the view has changed in the past 20 years. Nowadays, it is assumed that not only directed (targeted) radiation effect, but also an indirect (non-targeted) effect may contribute to the result of radiation treatment. Non-targeted effect is relatively well recognized after external beam irradiation in vitro and in vivo, and comprises such phenomena like radiation-induced bystander effect (RIBE), genomic instability, adaptive response and abscopal (out of field) effect...
June 8, 2017: Neoplasma
https://www.readbyqxmd.com/read/28579522/thermal-ablation-and-immunomodulation-from-preclinical-experiments-to-clinical-trials
#5
H Takaki, F Cornelis, Y Kako, K Kobayashi, N Kamikonya, K Yamakado
Accumulating evidence has shown that thermal ablation can induce spontaneous distant tumor regression, which is also known as abscopal effect. Abscopal effect might depend upon the activation of antitumor immune response. However, such responses induced by thermal ablation had been thought to be usually weak and that they rarely induce distant tumor regression. Recently, results of several preclinical and clinical studies have suggested that thermal ablation can induce therapeutically effective systemic antitumor immune response if appropriate immunomodulators are combined...
June 1, 2017: Diagnostic and Interventional Imaging
https://www.readbyqxmd.com/read/28571827/effect-on-overall-survival-of-locoregional-treatment-in-a-cohort-of-de-novo-metastatic-prostate-cancer-patients-a-single-institution-retrospective-analysis-from-the-royal-marsden-hospital
#6
Diletta Bianchini, David Lorente, Pasquale Rescigno, Zafeiris Zafeiriou, Elena Psychopaida, Hazel O'Sullivan, Mervyn Alaras, Michael Kolinsky, Semini Sumanasuriya, Mariane Sousa Fontes, Joaquin Mateo, Raquel Perez Lopez, Nina Tunariu, Nikolaos Fotiadis, Pardeep Kumar, Alison Tree, Nicholas Van As, Vincent Khoo, Chris Parker, Rosalind Eeles, Alan Thompson, David Dearnaley, Johann S de Bono
BACKGROUND: The optimal management of the primary tumor in metastatic at diagnosis (M1) prostate cancer (PCa) patients is not yet established. We retrospectively evaluated the effect of locoregional treatment (LRT) on overall survival (OS) hypothesizing that this could improve outcome through better local disease control and the induction of an antitumor immune response (abscopal effect). PATIENTS AND METHODS: M1 at diagnosis PCa patients referred to the Prostate Targeted Therapy Group at the Royal Marsden between June 2003 and December 2013 were identified...
April 26, 2017: Clinical Genitourinary Cancer
https://www.readbyqxmd.com/read/28559824/microwave-ablation-and-immune-activation-in-the-treatment-of-recurrent-colorectal-lung-metastases-a-case-report
#7
Magnus Bäcklund, Jacob Freedman
We present a patient with colorectal metastases confined to the lungs and treated with multiple resections until this was not an option anymore, followed by stereotactic body radiation therapy until this option was drained. Then, the patient was successfully treated with multiple microwave ablations combined with immunological activation targeting the programmed cell death 1 receptor (PD-1), possibly instigating a powerful abscopal effect. Techniques, doses, and radiological findings are presented.
January 2017: Case Reports in Oncology
https://www.readbyqxmd.com/read/28550027/exceptional-response-to-nivolumab-and-stereotactic-body-radiation-therapy-sbrt-in-neuroendocrine-cervical-carcinoma-with-high-tumor-mutational-burden-management-considerations-from-the-center-for-personalized-cancer-therapy-at-uc-san-diego-moores-cancer-center
#8
Andrew Sharabi, Sangwoo Shawn Kim, Shumei Kato, Philip D Sanders, Sandip Pravin Patel, Parag Sanghvi, Elizabeth Weihe, Razelle Kurzrock
Neuroendocrine carcinoma of the cervix is an ultra-rare malignancy with a poor prognosis and limited treatment options. Checkpoint blockade immunotherapy has rapidly developed into an emerging standard of care for several common disease types. Interestingly, in preclinical and retrospective clinical data, radiation therapy has been demonstrated to synergize with checkpoint inhibitors. Here we report a patient with metastatic, chemotherapy-refractory neuroendocrine carcinoma who presented with partial bowel obstruction due to a large tumor burden...
June 2017: Oncologist
https://www.readbyqxmd.com/read/28536278/immune-checkpoint-blockade-immunogenic-chemotherapy-or-ifn-%C3%AE-blockade-boost-the-local-and-abscopal-effects-of-oncolytic-virotherapy
#9
Laetitia Fend, Takahiro Yamazaki, Christelle Remy, Catherine Fahrner, Murielle Gantzer, Virginie Nourtier, Xavier Préville, Eric Quéméneur, Oliver Kepp, Julien Adam, Aurélien Marabelle, Jonathan M Pitt, Guido Kroemer, Laurence Zitvogel
Athough the clinical efficacy of oncolytic viruses has been demonstrated for local treatment, the ability to induce immune-mediated regression of distant metastases is still poorly documented. We report here that the engineered oncolytic vaccinia virus VVWR-TK(-)RR(-)-Fcu1 can induce immunogenic cell death and generate a systemic immune response. Effects on tumor growth and survival was largely driven by CD8(+) T cells, and immune cell infiltrate in the tumor could be reprogrammed towards a higher ratio of effector T cells to regulatory CD4(+) T cells...
May 23, 2017: Cancer Research
https://www.readbyqxmd.com/read/28533222/fractionated-radiation-therapy-stimulates-anti-tumor-immunity-mediated-by-both-resident-and-infiltrating-polyclonal-t-cell-populations-when-combined-with-pd1-blockade
#10
Simon J Dovedi, Eleanor J Cheadle, Amy Popple, Edmund Poon, Michelle Morrow, Ross Stewart, Erik Yusko, Catherine Sanders, Marissa Vignali, Ryan Emerson, Harlan Robins, Robert W Wilkinson, Jamie Honeychurch, Timothy Illidge
Purpose: Radiotherapy (RT) is a highly effective anti-cancer treatment forming part of the standard of care for the majority of patients, but local and distal disease recurrence remains a major cause of mortality. RT is known to enhance tumor immunogenicity; however, the contribution and mechanisms of RT induced immune responses are unknown. <p>Experimental Design: The impact of low-dose fractionated RT (5 x 2 Gy) alone and in combination with αPD-1 mAb on the tumor microenvironment was evaluated by flow cytometry and next-generation sequencing (NGS) of the T-cell receptor (TCR)-repertoire...
May 22, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28522277/-immunotherapy-and-radiotherapy
#11
S Bockel, D Antoni, É Deutsch, F Mornex
Radiotherapy, primarily known for its cytotoxic effect on the tumor cells, via the induction of DNA damages, has the ability to induce a systemic antitumoral response. By an immunologic cell death, tumor cells exposed to radiation release a large amount of neoantigenes and pro-inflammatory mediators, acting as an in situ vaccine, resulting in an tumor regression within the primary irradiated site, but also in the distant "out of field" secondary tumors. However, this phenomenon is extremly rare with radiotherapy alone, suggesting that the radiation-induced antitumor immunity is not sufficient for overcoming the tumor's and its microenvironnement immunosuppressing effect...
May 2017: Cancer Radiothérapie: Journal de la Société Française de Radiothérapie Oncologique
https://www.readbyqxmd.com/read/28512270/abscopal-effect-propitious-or-pernicious
#12
Sachin C Sarode, Nikunj Maniyar, Gargi S Sarode, Shankargouda Patil
Recent advances in the field of radiation biology have increased our knowledge of cellular responses to radiation and microenvironmental disseminations through radiation at molecular level.
May 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28501459/-cancer-radiotherapy-and-immune-system
#13
J P Nesseler, D Peiffert, G Vogin, P Nickers
Novel paradigms emerge in oncology today. Systemic treatments are more effective and diversified along with an increased life expectancy in oligometastatic patients. Stereotactic radiotherapy using hypofractionation opens new perspectives for local tumour control. The area of radiobiology has expanded with integration of tumour microenvironment in which radiation-induced inflammation mediators and immune system play a major role. Immunity checkpoints inhibitors experience a major development. This rapidly evolving field seems involved in the abscopal effects, especially when radiation is combined with checkpoints inhibitors, as demonstrated in numerous preclinical studies and several clinical trials...
May 10, 2017: Cancer Radiothérapie: Journal de la Société Française de Radiothérapie Oncologique
https://www.readbyqxmd.com/read/28475423/investigating-the-abscopal-effects-of-radioablation-on-shielded-bone-marrow-in-rodent-models-using-multimodality-imaging
#14
Solmaz F Afshar, Janice A Zawaski, Taeko Inoue, David A Rendon, Arthur W Zieske, Jyotinder N Punia, Omaima M Sabek, M Waleed Gaber
The abscopal effect is the response to radiation at sites that are distant from the irradiated site of an organism, and it is thought to play a role in bone marrow (BM) recovery by initiating responses in the unirradiated bone marrow. Understanding the mechanism of this effect has applications in treating BM failure (BMF) and BM transplantation (BMT), and improving survival of nuclear disaster victims. Here, we investigated the use of multimodality imaging as a translational tool to longitudinally assess bone marrow recovery...
May 5, 2017: Radiation Research
https://www.readbyqxmd.com/read/28447024/following-the-preclinical-data-leveraging-the-abscopal-effect-more-efficaciously
#15
Wilfred Ngwa, Zi Ouyang
Radiotherapy is employed in the treatment of over 50% of cancer patients. However, this therapy approach is limited to mainly treating localized disease. In 1953, Mole described the remarkable abscopal effect, whereby, localized radiotherapy of a patient's primary tumor might engender regression of cancer at distant sites, which were not irradiated. Current consensus is that if the abscopal effect can be efficaciously leveraged, it would transform the field of radiation oncology, extending the use of radiotherapy to treatment of both localized and metastatic disease...
2017: Frontiers in Oncology
https://www.readbyqxmd.com/read/28440500/indirect-effects-of-x-irradiation-on-proliferation-and-osteogenic-potential-of-bone-marrow-mesenchymal-stem-cells-in-a-local-irradiated-rat-model
#16
Ruilian Sun, Guoying Zhu, Jianping Wang, Ling Tong, Jianglong Zhai
Cancer survivors after radiotherapy may suffer a variety of bone‑related adverse side effects, including radioactive osteoporosis and fractures. Localized irradiation is a common treatment modality for malignancies. Recently, a series of reactions and injuries called indirect effects (remote changes in bone when other parts of the body are irradiated) have been reported on the indirect irradiated area of bone tissue after radiotherapy. To address this issue, we developed a rat localized irradiation model...
June 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28409192/can-local-radiotherapy-and-il-12-synergise-to-overcome-the-immunosuppressive-tumor-microenvironment-and-allow-in-situ-tumor-vaccination
#17
Gaël Deplanque, Keyvan Shabafrouz, Michel Obeid
The abscopal effect, which is the spontaneous regression of tumors or metastases outside the radiation field, occurs rarely in cancer patients. Interestingly, radiotherapy (RT) triggers an immunogenic cell death (ICD) that is able to generate tumor-specific cytotoxic CD8(+) T cells that are efficient in killing cancer cells. The key question is: why is this "abscopal effect" so uncommon in cancer patients treated with RT? Most probably, the main reason may be related to the highly immunosuppressive tumor microenvironment of well-established tumors that constantly antagonizes the anti-tumor immune responses triggered by RT...
April 13, 2017: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/28396751/an-abscopal-effect-in-a-case-of-concomitant-treatment-of-locally-and-peritoneally-recurrent-gastric-cancer-using-adoptive-t-cell-immunotherapy-and-radiotherapy
#18
Hiro Sato, Yoshiyuki Suzuki, Yuya Yoshimoto, Shin-Ei Noda, Kazutoshi Murata, Yosuke Takakusagi, Atsushi Okazaki, Tetsuo Sekihara, Takashi Nakano
The mechanism of abscopal effect is becoming clear by the progress of cancer immunology. A 54-year-old male with recurrent gastric cancer presented an abscopal effect after radiotherapy with concurrent adoptive T-cell immunotherapy (immunoradiotherapy). Immunoradiotherapy has potential to induce abscopal effect by strengthening systemic antitumor immunity even in recurrent cancer.
April 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/28357914/short-review-of-potential-synergies-of-immune-checkpoint-inhibition-and-radiotherapy-with-a-focus-on-hodgkin-lymphoma-radio-immunotherapy-opens-new-doors
#19
REVIEW
Christian Baues, Maike Trommer-Nestler, Karolina Jablonska, Paul J Bröckelmann, Max Schlaak, Michael von Bergwelt-Baildon, Andreas Engert, Robert Semrau, Simone Marnitz, Sebastian Theurich
Radiotherapy is an established local treatment in patients with various malignancies. Systemic responses following local irradiation have been described as abscopal effects. Modern cancer immunotherapy with immune checkpoint inhibitors has shown impressive response rates and prolongation of survival even in heavily pretreated patients with advanced solid malignancies and lymphomas. Radiotherapy has been shown to modulate immune response, and its application in the context of immune checkpoint inhibition has recently evolved into an active field of research...
March 2017: Immunotherapy
https://www.readbyqxmd.com/read/28352658/priming-is-key-to-effective-incorporation-of-image-guided-thermal-ablation-into-immunotherapy-protocols
#20
Matthew T Silvestrini, Elizabeth S Ingham, Lisa M Mahakian, Azadeh Kheirolomoom, Yu Liu, Brett Z Fite, Sarah M Tam, Samantha T Tucci, Katherine D Watson, Andrew W Wong, Arta M Monjazeb, Neil E Hubbard, William J Murphy, Alexander D Borowsky, Katherine W Ferrara
Focal therapies play an important role in the treatment of cancers where palliation is desired, local control is needed, or surgical resection is not feasible. Pairing immunotherapy with such focal treatments is particularly attractive; however, there is emerging evidence that focal therapy can have a positive or negative impact on the efficacy of immunotherapy. Thermal ablation is an appealing modality to pair with such protocols, as tumors can be rapidly debulked (cell death occurring within minutes to hours), tumor antigens can be released locally, and treatment can be conducted and repeated without the concerns of radiation-based therapies...
March 23, 2017: JCI Insight
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