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abscopal effect

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https://www.readbyqxmd.com/read/29138841/enhanced-activated-t%C3%A2-cell-subsets-in-prostate-cancer-patients-receiving-iodine-125-low-dose-rate-prostate-brachytherapy
#1
Makoto Kubo, Takefumi Satoh, Hiromichi Ishiyama, Ken-Ichi Tabata, Hideyasu Tsumura, Shoko Komori, Masatsugu Iwamura, Shiro Baba, Kazushige Hayakawa, Toshihiko Kawamura, Fumiya Obata
Radiotherapy (RT) is one of the most important treatments for prostate cancer. Although RT can kill cancer cells through direct and indirect effects of radiation, it occasionally induces an abscopal effect whereby localized radiation treatment is associated with elimination of metastatic cancer at a distance from the irradiated area. Thus, RT may induce an effective antitumor immune response, although the mechanism involved has remained unclear. The present was designed to evaluate this effect of RT in 36 patients with prostate cancer who provided informed consent prior to enrollment in this clinical trial...
November 13, 2017: Oncology Reports
https://www.readbyqxmd.com/read/29114600/abscopal-effect-in-recurrent-colorectal-cancer-treated-with-carbon-ion-radiation-therapy-2-case-reports
#2
Daniel K Ebner, Tadashi Kamada, Shigeru Yamada
No abstract text is available yet for this article.
July 2017: Advances in Radiation Oncology
https://www.readbyqxmd.com/read/29100279/radiotherapy-prolongs-the-survival-of-advanced-non-small-cell-lung-cancer-patients-undergone-to-an-immune-modulating-treatment-with-dose-fractioned-cisplatin-and-metronomic-etoposide-and-bevacizumab-mpebev
#3
Pierpaolo Pastina, Valerio Nardone, Cirino Botta, Stefania Croci, Paolo Tini, Giuseppe Battaglia, Veronica Ricci, Maria Grazia Cusi, Claudia Gandolfo, Gabriella Misso, Silvia Zappavigna, Michele Caraglia, Antonio Giordano, Donatella Aldinucci, Pierfrancesco Tassone, Pierosandro Tagliaferri, Luigi Pirtoli, Pierpaolo Correale
Radiotherapy (RT), together with a direct cytolytic effect on tumor tissue, also elicits systemic immunological events, which sometimes result in the regression of distant metastases (abscopal effect). We have shown the safety and anti-tumor activity of a novel metronomic chemotherapy (mCH) regimen with dose-fractioned cisplatin, oral etoposide and bevacizumab, a mAb against the vasculo-endothelial-growth-factor (mPEBev regimen), in metastatic non-small-cell-lung cancer (mNSCLC). This regimen, designed on the results of translational studies, showed immune-modulating effects that could trigger and empower the immunological effects associated with tumor irradiation...
September 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/29095061/history-of-bystander-effects-research-1905-present-what-s-in-a-name
#4
Carmel Mothersill, Andrej Rusin, Cristian Fernandez-Palomo, Colin Seymour
PURPOSE: This review, which arose from a Radiation Research Society History symposium, traces the history of "bystander effects" or "indirect effects" (also known as "abscopal effects", "clastogenic effects" and more recently "the secretosome"). In 1905, Murphy first drew attention to effects caused by the injection of irradiated cells into animals. In the present day, bystander effects are seen as part of the secretosome, where they coordinate responses to stressors at the tissue, organism, and population level...
November 2, 2017: International Journal of Radiation Biology
https://www.readbyqxmd.com/read/29027221/abscopal-immunological-effects-of-radiotherapy-narrowing-the-gap-between-clinical-and-preclinical-experiences
#5
REVIEW
Nikko Brix, Anna Tiefenthaller, Heike Anders, Claus Belka, Kirsten Lauber
Radiotherapy-despite being a local therapy that meanwhile is characterized by an impressively high degree of spatial accuracy-can stimulate systemic phenomena which occasionally lead to regression and rejection of non-irradiated, distant tumor lesions. These abscopal effects of local irradiation have been observed in sporadic clinical case reports since the beginning of the 20th century, and extensive preclinical work has contributed to identify systemic anti-tumor immune responses as the underlying driving forces...
November 2017: Immunological Reviews
https://www.readbyqxmd.com/read/28977985/improving-radiotherapy-in-cancer-treatment-promises-and-challenges
#6
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...
September 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28937261/radiation-induced-bystander-effects-in-the-spleen-of-cranially-irradiated-rats
#7
Amal A Mohye El-Din, Abdelrazek B Abdelrazzak, Moustafa T Ahmed, Mohamed A El-Missiry
OBJECTIVE: To investigate the radiation-induced abscopal effect in terms of oxidative stress, apoptosis and DNA damage in the spleen cells following cranial X-rays irradiation of rats. METHODS: Rats were cranially irradiated using 2 Gy X-rays. Another group was whole-body irradiated with 2 Gy X-rays and a third group was exposed to scattered radiation (measured to be 3 mGy). 24 hours following irradiation, sections from the spleen of the rats were dissected as well as plasma samples...
December 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28931759/combination-immunotherapy-with-tlr-agonists-and-checkpoint-inhibitors-suppresses-head-and-neck-cancer
#8
Fumi Sato-Kaneko, Shiyin Yao, Alast Ahmadi, Shannon S Zhang, Tadashi Hosoya, Megan M Kaneda, Judith A Varner, Minya Pu, Karen S Messer, Cristiana Guiducci, Robert L Coffman, Kazutaka Kitaura, Takaji Matsutani, Ryuji Suzuki, Dennis A Carson, Tomoko Hayashi, Ezra Ew Cohen
Checkpoint inhibitors have demonstrated efficacy in patients with recurrent or metastatic head and neck squamous cell carcinoma (HNSCC). However, the majority of patients do not benefit from these agents. To improve the efficacy of checkpoint inhibitors, intratumoral (i.t.) injection with innate immune activators, TLR7 and TLR9 agonists, were tested along with programmed death-1 receptor (PD-1) blockade. The combination therapy suppressed tumor growth at the primary injected and distant sites in human papillomavirus-negative (HPV-negative) SCC7 and MOC1, and HPV-positive MEER syngeneic mouse models...
September 21, 2017: JCI Insight
https://www.readbyqxmd.com/read/28929083/emerging-therapies-for-stage-iii-non-small-cell-lung-cancer-stereotactic-body-radiation-therapy-and-immunotherapy
#9
REVIEW
Sameera S Kumar, Kristin A Higgins, Ronald C McGarry
The current standard of care for locally advanced non-small cell lung cancer (NSCLC) includes radiation, chemotherapy, and surgery in certain individualized cases. In unresectable NSCLC, chemoradiation has been the standard of care for the past three decades. Local and distant failure remains high in this group of patients, so dose escalation has been studied in both single institution and national clinical trials. Though initial studies showed a benefit to dose escalation, phase III studies examining dose escalation using standard fractionation or hyperfractionation have failed to show a benefit...
2017: Frontiers in Oncology
https://www.readbyqxmd.com/read/28920000/oncolytic-peptide-ltx-315-induces-an-immune-mediated-abscopal-effect-in-a-rat-sarcoma-model
#10
Janne Nestvold, Meng-Yu Wang, Ketil A Camilio, Severin Zinöcker, Torunn Elisabeth Tjelle, Alf Lindberg, Bengt Erik Haug, Gunnar Kvalheim, Baldur Sveinbjørnsson, Øystein Rekdal
LTX 315 is an oncolytic peptide with potent immunological properties. In the present study, we demonstrate that intratumoral treatment with LTX-315 resulted in a complete regression and systemic immune response in a rat fibrosarcoma model. The treatment was T-cell dependent, and also resulted in an abscopal effect as demonstrated by the regression of distal non-treated lesions. Significant infiltration of CD8(+) T cells was observed in both treated and non-treated lesions, as shown by immunohistochemical and flow cytometric analysis...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28905118/administration-of-low-dose-combination-anti-ctla4-anti-cd137-and-anti-ox40-into-murine-tumor-or-proximal-to-the-tumor-draining-lymph-node-induces-systemic-tumor-regression
#11
Jonathan P O Hebb, Adriane R Mosley, Felipe Vences-Catalán, Narendiran Rajasekaran, Anna Rosén, Peter Ellmark, Dean W Felsher
The delivery of immunomodulators directly into the tumor potentially harnesses the existing antigen, tumor-specific infiltrating lymphocytes, and antigen presenting cells. This can confer specificity and generate a potent systemic anti-tumor immune response with lower doses and less toxicity compared to systemic administration, in effect an in situ vaccine. Here, we test this concept using the novel combination of immunomodulators anti-CTLA4, -CD137, and -OX40. The triple combination administered intratumorally at low doses to one tumor of a dual tumor mouse model had dramatic local and systemic anti-tumor efficacy in lymphoma (A20) and solid tumor (MC38) models, consistent with an abscopal effect...
September 13, 2017: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/28872544/soft-tissue-response-on-18f-fluorocholine-pet-ct-in-metastatic-castrate-resistant-prostate-cancer-treated-with-223ra-dichloride-a-possible-abscopal-effect
#12
Sandi A Kwee, John Lim, Marc N Coel
Two patients with castrate-resistant prostate cancer and symptomatic skeletal metastases underwent F-fluorocholine PET/CT prior to treatment with Ra-dichloride to reveal additional active lesions in the prostate gland and lymph nodes. Subsequent scans performed at the midpoint and end of Ra-dichloride therapy showed resolution of this soft tissue activity alongside declining bone lesion activity. Concomitant increases in plasma interleukin 6 were detected, suggesting that immune system activation may have mediated the soft tissue response...
September 1, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28871985/stimulating-innate-immunity-to-enhance-radiation-therapy-induced-tumor-control
#13
REVIEW
Jason R Baird, Arta M Monjazeb, Omid Shah, Heather McGee, William J Murphy, Marka R Crittenden, Michael J Gough
Novel ligands that target Toll-like receptors and other innate recognition pathways represent a potent strategy for modulating innate immunity to generate antitumor immunity. Although many of the current clinically successful immunotherapies target adaptive T-cell responses, both preclinical and clinical studies suggest that adjuvants have the potential to enhance the scope and efficacy of cancer immunotherapy. Radiation may be a particularly good partner to combine with innate immune therapies, because it is a highly efficient means to kill cancer cells but may fail to send the appropriate inflammatory signals needed to act as an efficient endogenous vaccine...
October 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28870955/correlation-of-radiation-pneumonitis-history-before-nivolumab-with-onset-of-interstitial-lung-disease-and-progression-free-survival-of-patients-with-pre-treated-advanced-non-small-cell-lung-cancer
#14
Akihiro Tamiya, Motohiro Tamiya, Kenji Nakahama, Yoshihiko Taniguchi, Takayuki Shiroyama, Shun-Ichi Isa, Takako Inoue, Kyoichi Okishio, Kazumi Nishino, Toru Kumagai, Hidekazu Suzuki, Tomonori Hirashima, Fumio Imamura, Shinji Atagi
BACKGROUND/AIM: Nivolumab has a promising efficacy for patients with non-small-cell lung cancer (NSCLC) as second-line or later treatment, and after radiotherapy as abscopal effect. However, the effects of radiation pneumonitis history before nivolumab have not been clarified. Therefore, we retrospectively analyzed the correlation of a history of radiation pneumonitis before nivolumab with onset of interstitial lung disease (ILD) and progression-free survival (PFS) after nivolumab treatment in patients with previously treated NSCLC...
September 2017: Anticancer Research
https://www.readbyqxmd.com/read/28858075/concurrent-radiotherapy-for-patients-with-metastatic-melanoma-and-receiving-anti-programmed-death-1-therapy-a-safe-and-effective-combination
#15
Amélie Aboudaram, Anouchka Modesto, Léonor Chaltiel, Carlos Gomez-Roca, Serge Boulinguez, Vincent Sibaud, Jean-Pierre Delord, Ciprian Chira, Martine Delannes, Elizabeth Moyal, Nicolas Meyer
A combination of immune-checkpoint inhibitors and radiation therapy (RT) represents a promising therapeutic strategy in part mediated by the abscopal effect, but clinical experience related to this combination remains scarce. Clinical data and patterns of treatment were retrospectively collected from all consecutive patients with metastatic melanoma and receiving programmed-death 1 (PD-1) immune-checkpoint inhibitors. Survival data, best overall response, and acute and delayed toxicities (graded according to Common Terminology Criteria for Adverse Events, v 4...
October 2017: Melanoma Research
https://www.readbyqxmd.com/read/28838649/brachytherapy-attains-abscopal-effects-when-combined-with-immunostimulatory-monoclonal-antibodies
#16
María E Rodriguez-Ruiz, Inmaculada Rodriguez, Benigno Barbes, Lina Mayorga, Alfonso Rodriguez Sanchez-Paulete, Mariano Ponz-Sarvise, José Luis Pérez-Gracia, Ignacio Melero
PURPOSE/OBJECTIVES: Preclinical and clinical evidence indicate that the proimmune effects of radiotherapy can be synergistically augmented with immunostimulatory monoclonal antibodies (mAb) to act both on irradiated tumor lesions and on tumors at distant, nonirradiated sites. We have recently reported that external beam radiotherapy achieves abscopal effects when combined with antagonist anti-PD1 mAbs and agonist anti-CD137 (4-1BB) mAbs. The goal of this work is to study the abscopal effects of radiotherapy instigated by brachytherapy techniques...
August 21, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28795608/focus-small-to-find-big-the-microbeam-story
#17
Jinhua Wu, Tom K Hei
PURPOSE: Even though the first ultraviolet microbeam was described by S. Tschachotin back in 1912, the development of sophisticated micro-irradiation facilities only began to flourish in the late 1980s. In this article, we highlight significant microbeam experiments, describe the latest microbeam irradiator configurations and critical discoveries made by using the microbeam apparatus. MATERIALS AND METHODS: Modern radiological microbeams facilities are capable of producing a beam size of a few micrometers, or even tens of nanometers in size, and can deposit radiation with high precision within a cellular target...
August 10, 2017: International Journal of Radiation Biology
https://www.readbyqxmd.com/read/28791476/abscopal-effect-of-boron-neutron-capture-therapy-bnct-proof-of-principle-in-an-experimental-model-of-colon-cancer
#18
Verónica A Trivillin, Emiliano C C Pozzi, Lucas L Colombo, Silvia I Thorp, Marcela A Garabalino, Andrea Monti Hughes, Sara J González, Rubén O Farías, Paula Curotto, Gustavo A Santa Cruz, Daniel G Carando, Amanda E Schwint
The aim of the present study was to evaluate, for the first time, the abscopal effect of boron neutron capture therapy (BNCT). Twenty-six BDIX rats were inoculated subcutaneously with 1 × 10(6) DHD/K12/TRb syngeneic colon cancer cells in the right hind flank. Three weeks post-inoculation, the right leg of 12 rats bearing the tumor nodule was treated with BPA-BNCT (BPA-Boronophenylalanine) at the RA-3 nuclear reactor located in Buenos Aires, Argentina, at an absorbed dose of 7.5 Gy to skin as the dose-limiting tissue...
November 2017: Radiation and Environmental Biophysics
https://www.readbyqxmd.com/read/28721900/triggering-the-abscopal-effect-is-the-quality-of-the-radiation-important
#19
Frederik J Vernimmen, Jill T Nicholson
No abstract text is available yet for this article.
August 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28686524/hunting-for-abscopal-and-bystander-effects-clinical-exploitation-of-non-targeted-effects-induced-by-partial-high-single-dose-irradiation-of-the-hypoxic-tumour-segment-in-oligometastatic-patients
#20
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