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Total body irradiation

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https://www.readbyqxmd.com/read/28110075/tlr9-mediated-regulatory-b10-cell-amplification-following-sub-total-body-irradiation-implications-in-attenuating-eae
#1
Jinsheng Hong, Jie Fang, Ruilong Lan, Qi Tan, Yeping Tian, Mei Zhang, Paul Okunieff, Lurong Zhang, Jianhua Lin, Deping Han
Autoimmunity and inflammation are controlled in part by regulatory B (Breg) cells, including the recently identified IL-10-competent B10 cell subset that represents 1%-3% of mouse spleen B cells. In this study, the influence of irradiation on Breg/B10 cell generation and IL-10 production mediated by TLR9 signaling pathways was investigated. Spleen and peritoneal cavity Breg/B10 cell frequencies were significantly expanded three weeks after sub-total body irradiation (sub-TBI, 5Gy or 10Gy) in adult male wild type (WT) C57BL/6(B6) mice but not in TLR9(-/-) mice...
January 18, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28108271/comparative-effectiveness-of-busulfan-and-fludarabine-versus-fludarabine-and-400-cgy-total-body-irradiation-conditioning-regimens-for-aml-mds
#2
Moaath Mustafa Ali, Donna M Abounader, Lisa A Rybicki, Melissa A Yurch, Jamie Starn, Christina Ferraro, Victoria Winslow, Betty K Hamilton, Aaron T Gerds, Hien Liu, Robert Dean, Brian T Hill, Brad Pohlman, Steven Andresen, Rabi Hanna, Matt Kalaycio, Brian J Bolwell, Navneet S Majhail, Ronald Sobecks
Allogeneic hematopoietic cell transplantation (alloHCT) conditioning regimen intensity has varied for patients with acute myeloid leukemia (AML) and myelodysplastic syndrome (MDS). A comparative effectiveness analysis was performed to assess outcomes of busulfan and fludarabine (BuFlu) versus fludarabine and 400 cGy total body irradiation (FluTBI) conditioning. Thirty-three subjects received BuFlu and 38 had FluTBI. The BuFlu group received more red blood cell transfusions (P=0.02) and had a longer time to platelet recovery (P=0...
January 17, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28105098/radioprotective-effects-of-pyrroloquinoline-quinone-on-parotid-glands-in-c57bl-6j-mice
#3
Yuanqing Huang, Ning Chen, Dengshun Miao
The aim of the present study was to investigate whether pyrroloquinoline quinine (PQQ) serve a radioprotective role in parotid gland damage induced by total body irradiation (TBI) in C57BL/6J mice. A total of 15 female 8-week-old C57BL/6J mice were randomly assigned into three treatment groups: i) Untreated control (no irradiation); ii) 4 gray (Gy) X-ray irradiation; iii) 4 Gy X-ray irradiation with additional dietary PQQ (4 mg PQQ/kg in normal diet). Each group included five mice. After 4 weeks, all animals were collected for evaluating the phenotype, body weight, pathological and biochemical parameters...
December 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28096089/tolerogenic-interactions-between-cd8-dendritic-cells-and-nkt-cells-prevent-rejection-of-bone-marrow-and-organ-grafts
#4
David Hongo, Xiaobin Tang, Xiangyue Zhang, Edgar G Engleman, Samuel Strober
The combination of total lymphoid irradiation and anti-T cell antibodies safely induces immune tolerance to combined hematopoietic cell and organ allografts in humans. Our mouse model required host natural killer T (NKT) cells to induce tolerance. Since NKT cells normally depend on signals from CD8+ dendritic cells (DCs) for their activation, we used the mouse model to test the hypothesis that after lymphoid irradiation host CD8+DCs play a requisite role in tolerance induction through interactions with NKT cells...
January 17, 2017: Blood
https://www.readbyqxmd.com/read/28094209/simplified-low-dose-rate-infant-total-body-irradiation
#5
Nels Knutson, Y James Rao, Sridhar Yaddanapudi, Stephanie M Perkins, H Harold Li
PURPOSE: Low-dose-rate total body irradiation (LDR TBI) in infants possesses unique challenges because of the setup limitations imposed by anesthesia. We present an LDR TBI method with an anteroposterior/posteroanterior arrangement and dose rate < 10 cGy/minute for infants (thickness <14 cm) without the use of a beam attenuator. MATERIALS AND METHODS: The delivery used a 6 MV TrueBeam linear accelerator (Varian Medical Systems, Palo Alto, CA) with adjustable meterset rates below 100 MU/minute...
October 24, 2016: Practical Radiation Oncology
https://www.readbyqxmd.com/read/28092350/long-term-renal-survival-in-patients-undergoing-t-cell-depleted-versus-conventional-hematopoietic-stem-cell-transplants
#6
I G Glezerman, S Devlin, M Maloy, M Bui, E A Jaimes, S A Giralt, A A Jakubowski
Calcineurin inhibitor (CNI)-sparing T-cell depleted (TCD) hematopoietic stem cell transplants (HSCTs) are presumed to be less nephrotoxic than conventional HSCTs. We evaluated incidence and risk factors for kidney failure and chronic kidney disease (CKD) in 231 TCD and 212 conventional HSCT recipients. Kidney failure required a median glomerular filtration rate (GFR) <60 ml/min/1.73 m(2) for ⩾100 days anytime after 180-days post-HSCT. Two-year cumulative incidence (CI) of kidney failure was 42% in the conventional versus 31% in the TCD group (P=0...
January 16, 2017: Bone Marrow Transplantation
https://www.readbyqxmd.com/read/28087884/the-role-of-immunoglobulin-prophylaxis-for-prevention-of-cytomegalovirus-infection-in-pediatric-hematopoietic-stem-cell-transplantation-recipients
#7
Gal Goldstein, Tal Frenkel Rutenberg, Sarina Levy Mendelovich, Daphna Hutt, Michal Teperberg Oikawa, Amos Toren, Bella Bielorai
BACKGROUND: Following cessation of intravenous immunoglobulin (IVIg) administration for allogeneic hematopoietic stem cell transplantation (HSCT) recipients at our unit, we observed a sharp decline in the incidence of cytomegalovirus (CMV) infection. PROCEDURE: We conducted a retrospective study of the role of IVIg in the prevention of CMV infection in children and young adults who underwent HSCT from matched related donor. RESULTS: We included 109 patients (IVIg+/IVIg- ratio 82/27)...
January 14, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28087456/phase-i-trial-of-total-marrow-and-lymphoid-irradiation-transplant-conditioning-in-patients-with-relapsed-refractory-acute-leukemia
#8
Anthony Stein, Joycelynne Palmer, Ni-Chun Tsai, Monzr M Al Malki, Ibrahim Aldoss, Haris Ali, Ahmed Aribi, Len Farol, Chatchada Karanes, Samer Khaled, An Liu, Margaret O'Donnell, Pablo Parker, Anna Pawlowska, Vinod Pullarkat, Eric Radany, Joseph Rosenthal, Firoozeh Sahebi, Amandeep Salhotra, James F Sanchez, Tim Schultheiss, Ricardo Spielberger, Sandra H Thomas, David Snyder, Ryotaro Nakamura, Guido Marcucci, Stephen J Forman, Jeffrey Wong
Current conditioning regimens provide insufficient disease control in relapsed/refractory acute leukemia (AL) patients undergoing hematopoietic stem cell transplantation (HSCT) with active disease. Intensification of chemotherapy and/or total body irradiation (TBI) is not feasible because of excessive toxicity. Total marrow and lymphoid irradiation (TMLI) allows for precise delivery and increased intensity treatment via sculpting radiation to sites with high disease burden or high risk for disease involvement, while sparing normal tissue...
January 10, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28079265/chimeric-antigen-receptor-t-cells-in-hematologic-malignancies
#9
Brandon R Shank, Bryan Do, Adrienne Sevin, Sheree E Chen, Sattva S Neelapu, Sandra B Horowitz
Patients with B cell hematologic malignancies who progress through first or second line chemotherapy have a poor prognosis. Early clinical trials with autologous anti-CD19 chimeric antigen receptor (CAR) T cells have demonstrated promising results for patients who have relapsed or refractory disease. Lymphodepleting conditioning regimens including cyclophosphamide, fludarabine, pentostatin, bendamustine, interleukin-2, and total body irradiation are often administered prior to infusion of CAR T cells, allowing for greater T cell expansion...
January 12, 2017: Pharmacotherapy
https://www.readbyqxmd.com/read/28074473/predicting-cd4-t-cell-reconstitution-following-paediatric-haematopoietic-stem-cell-transplantation
#10
Rollo L Hoare, Paul Veys, Nigel Klein, Robin Callard, Joseph F Standing
Haematopoietic stem cell transplantation is an increasingly common treatment for children with a range of haematological disorders. Conditioning with cytotoxic chemotherapy and total body irradiation leaves patients severely immunocompromised. T-cell reconstitution can take several years due to delayed restoration of thymic output. Understanding T-cell reconstitution in children is complicated by normal immune system maturation, heterogeneous diagnoses, and sparse uneven sampling due to the long time spans involved...
January 11, 2017: Clinical Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28068235/patterns-of-relapse-in-high-risk-neuroblastoma-patients-treated-with-and-without-total-body-irradiation
#11
Richard Li, Alexei Polishchuk, Steven DuBois, Randall Hawkins, Stephanie W Lee, Rochelle Bagatell, Suzanne Shusterman, Christine Hill-Kayser, Hasan Al-Sayegh, Lisa Diller, Daphne A Haas-Kogan, Katherine K Matthay, Wendy B London, Karen J Marcus
PURPOSE: External beam radiation therapy to initial sites of disease may influence relapse patterns in high-risk neuroblastoma. However, the effect of systemic irradiation by use of total body irradiation (TBI) on anatomic patterns of relapse has not previously been investigated. METHODS AND MATERIALS: We retrospectively analyzed patients receiving definitive treatment of high-risk neuroblastoma with subsequent relapse in bony metastatic sites, with a date of relapse between January 1, 1997, and December 31, 2012...
February 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28064218/effectiveness-of-analogs-of-the-gs-nitroxide-jp4-039-as-total-body-irradiation-mitigators
#12
Michael W Epperly, Joshua R Sacher, Tanja Krainz, Xiaolin Zhang, Peter Wipf, Mary Liang, Renee Fisher, Song Li, Hong Wang, Joel S Greenberger
BACKGROUND/AIM: Mitochondrial-targeted gramicidin S (GS)-nitroxide, JP4-039, has been demonstrated to be a potent radiation mitigator, and safe over a wide dose range. In addition, JP4-039 has organ-specific effectiveness when locally applied. MATERIALS AND METHODS: We tested the effect of another GS-nitroxide, XJB-5-131, which has more effective mitochondrial localization, and compared these results to those for radiation mitigation against the hematopoietic syndrome, and two analogs of JP4-039, which have the same mitochondrial localization signal, but different chemical payloads: JRS527...
January 2017: In Vivo
https://www.readbyqxmd.com/read/28060909/long-term-depletion-of-conventional-dendritic-cells-cannot-be-maintained-in-an-atherosclerotic-zbtb46-dtr-mouse-model
#13
Miche Rombouts, Nathalie Cools, Mandy O J Grootaert, Flore de Bakker, Ilse Van Brussel, An Wouters, Guido R Y De Meyer, Benedicte Y De Winter, Dorien M Schrijvers
BACKGROUND AND AIMS: Increased evidence suggests a pro-atherogenic role for conventional dendritic cells (cDC). However, due to the lack of an exclusive marker for cDC, their exact contribution to atherosclerosis remains elusive. Recently, a unique transcription factor was described for cDC, namely Zbtb46, enabling us to selectively target this cell type in mice. METHODS: Low-density lipoprotein receptor-deficient (Ldlr-/-) mice were transplanted with bone marrow from Zbtb46-diphtheria toxin receptor (DTR) transgenic mice following total body irradiation...
2017: PloS One
https://www.readbyqxmd.com/read/28049509/hyperbaric-oxygen-therapy-for-a-refractory-skin-ulcer-after-radical-mastectomy-and-radiation-therapy-a-case-report
#14
Mitsuhiro Enomoto, Kazuyoshi Yagishita, Kae Okuma, Takuya Oyaizu, Yasushi Kojima, Atsushi Okubo, Takuma Maeda, Satoko Miyamoto, Atsushi Okawa
BACKGROUND: Radiation therapy is performed as an adjuvant therapy when indicated following surgical resection of malignant tumors. However, radiation exposure induces acute or chronic dermatitis, depending on the radiation dose, interval, tissue volume, or irradiated area of the body. Radiation-induced skin ulcers and osteomyelitis of the underlying bone are intractable late-stage complications of radiation therapy, and often require reconstructive surgery to cover exposed tissue. Hyperbaric oxygen therapy has been suggested as a treatment for delayed radiation injury with soft tissue and bony necrosis...
January 4, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28048596/su-f-t-248-fmea-risk-analysis-implementation-aapm-tg-100-in-total-skin-electron-irradiation-technique
#15
B Ibanez-Rosello, J Bautista-Ballesteros, J Bonaque, J Perez-Calatayud, A Gonzalez-Sanchis, J Lopez-Torrecilla, L Brualla-Gonzalez, T Garcia-Hernandez, A Vicedo-Gonzalez, D Granero, A Serrano, B Borderia, C Solera, J Rosello
PURPOSE: Total Skin Electron Irradiation (TSEI) is a radiotherapy treatment which involves irradiating the entire body surface as homogeneously as possible. It is composed of an extensive multi-step technique in which quality management requires high consumption of resources and a fluid communication between the involved staff, necessary to improve the safety of treatment. The TG-100 proposes a new perspective of quality management in radiotherapy, presenting a systematic method of risk analysis throughout the global flow of the stages through the patient...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048541/su-f-t-327-total-body-irradiation-in-vivo-dose-measurements-using-optically-stimulated-luminescence-osl-nanodots-and-farmer-type-ion-chamber
#16
H Kaur, S Kumar, B Sarkar, T Ganesh, U Giri, K Jassal, S Rathinamuthu, G Gulia, V Gopal, B Mohanti, A Munshi
PURPOSE: This study was performed to analyze the agreement between optically stimulated luminescence (OSL) nanoDots measured doses and 0.6 cc Farmer type ionization chamber measured doses during total body irradiation (TBI). METHODS: In-vivo dose measurements using OSL nanoDots and Farmer chamber were done in a total of twelve patients who received TBI at our center by bilateral parallel-opposed beams technique. In this technique, the patient is kept inside the TBI box which is filled with rice bags and irradiated using two bilateral parallel opposed beams of 40×40 cm(2) size with 45° collimator rotation at an SSD of 333...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048008/su-f-t-289-mlc-fluence-sonogram-based-delivery-quality-assurance-for-bilateral-breast-irradiation
#17
Rajesh Thiyagarajan, K P Karrthick, Tejinder Kataria, N Arunai, Nambi Raj, Ramu Mahendran, Tamil Selvan, Palani Duraikannu
PURPOSE: Performing DQA for Bilateral (B-L) breast tomotherapy is a challenging task due to the limitation of any commercially available detector array or film. Aim of this study is to perform DQA for B-L breast tomotherapy plan using MLC fluence sinogram. METHODS: Treatment plan was generated on Tomotherapy system for B-L breast tumour. B-L breast targets were given 50.4 Gy prescribed over 28 fractions. Plan is generated with 6 MV photon beam & pitch was set to 0...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047953/su-f-t-383-robustness-for-patient-setup-error-in-total-body-irradiation-using-volumetric-modulated-arc-therapy-vmat
#18
Y Takahashi, H Tachibana, N Nakamura
PURPOSE: Total body irradiation (TBI) and total marrow irradiation (TMI) using Tomotherapy have been reported. A gantry-based linear accelerator uses one isocenter during one rotational irradiation. Thus, 3-5 isocenter points should be used for a whole plan of TBI-VMAT during smoothing out the junctional dose distribution. IGRT provides accurate and precise patient setup for the multiple junctions, however it is evident that some setup errors should occur and affect accuracy of dose distribution in the area...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047861/su-f-t-317-skin-exposure-outside-the-treatment-field-during-treatment-of-breast-cancer-with-tri-co-60-mr-igrt-system
#19
J Park, J Kim, S Park, S Kim, K Shin
PURPOSE: To investigate exposure outside the treatment field when treating breast cancer with tri-Co-60 magnetic resonance (MR) image guided radiation therapy (IGRT) system. METHODS: A total of 7 patients who treated with accelerated partial breast irradiation (APBI) technique were selected prospectively for this study (prescription dose = 38.5 Gy in 10 fractions). Every patient treated with two plans, one was an initial plan and the other was an adaptive plan generated after finishing 5 fractions (a total of 14 plans)...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047697/su-f-t-661-dependence-of-gold-nano-particles-cluster-morphology-on-dose-enhancement-of-photon-radiation-therapy-apply-for-radiation-biology-effect
#20
S Ahn, K Chung, Y Han, H Park
PURPOSE: Injected gold nano particles (GNPs) to a body for dose enhancement are known to form in the tumorcell cluster morphology. We investigated the dependence of dose enhancement on the morphology characteristic with an approximated morphology model by using Monte Carlo simulations. METHODS: For MC simulation, TOPAS version 2.0P-03 was used. GNP cluster morphology was approximated as a body center cubic(BCC) model by placing 8 GNPs at the corner and one at the center of cube with length from 2...
June 2016: Medical Physics
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