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total marrow irradiation

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https://www.readbyqxmd.com/read/28931604/sublethal-total-body-irradiation-causes-long-term-deficits-in-thymus-function-by-reducing-lymphoid-progenitors
#1
Shiyun Xiao, Ivo D Shterev, Wen Zhang, Lauren Young, Jae-Hung Shieh, Malcolm Moore, Marcel van den Brink, Gregory D Sempowski, Nancy R Manley
Total body irradiation (TBI) damages hematopoietic cells in the bone marrow and thymus; however, the long-term effects of irradiation with aging remain unclear. In this study, we found that the impact of radiation on thymopoiesis in mice varied by sex and dose but, overall, thymopoiesis remained suppressed for ≥12 mo after a single exposure. Male and female mice showed a long-term dose-dependent reduction in thymic cKit(+) lymphoid progenitors that was maintained throughout life. Damage to hematopoietic stem cells (HSCs) in the bone marrow was dose dependent, with as little as 0...
September 20, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28922655/zymosan-a-protects-the-hematopoietic-system-from-radiation-induced-damage-by-targeting-tlr2-signaling-pathway
#2
Jicong Du, Ying Cheng, Suhe Dong, Pei Zhang, Jiaming Guo, Jiaqi Han, Fu Gao, Hainan Zhao, Ding Sun, Jianguo Cui, Jianming Cai, Cong Liu
BACKGROUND/AIMS: The hematopoietic system is vulnerable to ionizing radiation and is often severely damaged by radiation. Molecules affecting radioresistance include Toll-like receptor 2. We investigated whether Zymosan-A, a novel TLR2 agonist, can protect the hematopoietic system from radiation-induced damage after total body irradiation. METHODS: Mice were exposed to total body radiation after treatment with Zymosan-A or normal saline, and their survival was recorded...
September 1, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28865761/predicting-severe-hematologic-toxicity-from-extended-field-chemoradiation-of-para-aortic-nodal-metastases-from-cervical-cancer
#3
Kevin Yan, Ezequiel Ramirez, Xian-Jin Xie, Xuejun Gu, Yin Xi, Kevin Albuquerque
PURPOSE: The purpose of this study was to determine factors predictive for severe hematologic toxicity (HT) in cervical cancer patients with para-aortic lymph node metastasis treated with concurrent cisplatin chemoradiation to an extended field (EFCRT). METHODS AND MATERIALS: Thirty-eight patients with cervical cancer and para-aortic lymph node metastasis who underwent EFCRT were analyzed. Active bone marrow was defined as the region within irradiated total bone marrow (BMTOT) with a standard uptake value on (18)F-fluorodeoxyglucose positron emission tomography/computed tomography greater than the mean standard uptake value for BMTOT...
July 8, 2017: Practical Radiation Oncology
https://www.readbyqxmd.com/read/28807769/reduced-intensity-haploidentical-bone-marrow-transplantation-with-post-transplant-cyclophosphamide-for-solid-tumors-in-pediatric-and-young-adult-patients
#4
Nicolas J Llosa, Kenneth R Cooke, Allen Chen, Christopher Gamper, Orly Klein, Elias Zambidis, Brandon Luber, Gary Rosner, Nicholas Siegel, Mary Jo Holuba, Nancy Robey, Masanori Hayashi, Richard J Jones, Ephraim Fuchs, Matthias Holdhoff, David M Loeb, Heather J Symons
High-risk, recurrent, or refractory solid tumors in pediatric, adolescent, and young adult (AYA) patients have an extremely poor prognosis despite current intensive treatment regimens. We piloted an allogeneic bone marrow transplant platform using reduced-intensity conditioning (RIC) and partially HLA-mismatched (haploidentical) related donors for this population of pediatric and AYA solid tumor patients. Sixteen patients received fludarabine, cyclophosphamide, melphalan, and low-dose total body irradiation RIC haploidentical BMT (haploBMT) followed by post-transplantation cyclophosphamide (PTCy), mycophenolate mofetil, and sirolimus...
August 12, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28782442/whole-body-proton-irradiation-causes-acute-damage-to-bone-marrow-hematopoietic-progenitor-and-stem-cells-in-mice
#5
Jianhui Chang, Yingying Wang, Rupak Pathak, Vijayalakshmi Sridharan, Tamako Jones, Xiao Wen Mao, Gregory Nelson, Marjan Boerma, Martin Hauer-Jensen, Daohong Zhou, Lijian Shao
PURPOSE: Exposure to proton irradiation during missions in deep space can lead to bone marrow injury. The acute effects of proton irradiation on hematopoietic stem and progenitor cells remain undefined and thus were investigated. MATERIALS AND METHODS: We exposed male C57BL/6 mice to 0.5 and 1.0 Gy proton total body irradiation (proton-TBI, 150 MeV) and examined changes in peripheral blood cells and bone marrow (BM) progenitors and LSK cells 2 weeks after exposure...
August 7, 2017: International Journal of Radiation Biology
https://www.readbyqxmd.com/read/28771181/ghrelin-therapy-decreases-incidents-of-intracranial-hemorrhage-in-mice-after-whole-body-ionizing-irradiation-combined-with-burn-trauma
#6
Nikolai V Gorbunov, Juliann G Kiang
Nuclear industrial accidents and the detonation of nuclear devices cause a variety of damaging factors which, when their impacts are combined, produce complicated injuries challenging for medical treatment. Thus, trauma following acute ionizing irradiation (IR) can deteriorate the IR-induced secondary reactive metabolic and inflammatory impacts to dose-limiting tissues, such as bone marrow/lymphatic, gastrointestinal tissues, and vascular endothelial tissues, exacerbating the severity of the primary injury and decreasing survival from the exposure...
August 3, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28771086/exposure-to-low-dose-x-ray-radiation-alters-bone-progenitor-cells-and-bone-microarchitecture
#7
Florence Lima, Joshua M Swift, Elisabeth S Greene, Matthew R Allen, David A Cunningham, Leslie A Braby, Susan A Bloomfield
Exposure to high-dose ionizing radiation during medical treatment exerts well-documented deleterious effects on bone health, reducing bone density and contributing to bone growth retardation in young patients and spontaneous fracture in postmenopausal women. However, the majority of human radiation exposures occur in a much lower dose range than that used in the radiation oncology clinic. Furthermore, very few studies have examined the effects of low-dose ionizing radiation on bone integrity and results have been inconsistent...
August 3, 2017: Radiation Research
https://www.readbyqxmd.com/read/28757529/inhibition-of-adipogenesis-is-involved-in-the-protective-effects-of-1-25-dihydroxy-vitamin-d3-on-the-radiation-injured-bone-marrow-microenvironment-in-mice
#8
Zhao Zhou, Xiao-Yu Chen, Ai-Zhen Zhu, Cheng-Cheng Liu, Jin-Can Zhu, Ge-Xiu Liu
To explore the protective effects of 1,25-dihydroxy vitamin D3 (1,25-(OH)2D3) on the bone marrow microenvironment in mice after irradiation and the underlying molecular mechanisms, a total of 150 7-wk-old male BALB/c mice were randomly divided into a normal group, an irradiation (IR) group and an irradiation+1,25-(OH)2D3 (IR+VD3) group. The mice in the IR+VD3 group were treated with 6.0 Gy (60)Coγ rays, and 1,25-(OH)2D3 (dissolved in DMSO, 2.5 μg/kg) was administered once per day from 2 d before to 8 d after irradiation...
2017: Journal of Nutritional Science and Vitaminology
https://www.readbyqxmd.com/read/28752258/allogeneic-reduced-intensity-hematopoietic-stem-cell-transplantation-for-chronic-granulomatous-disease-a-single-center-prospective-trial
#9
Mark Parta, Corin Kelly, Nana Kwatemaa, Narda Theobald, Diane Hilligoss, Jing Qin, Douglas B Kuhns, Christa Zerbe, Steven M Holland, Harry Malech, Elizabeth M Kang
PURPOSE: The purpose of this study was to evaluate engraftment and adverse events with a conditioning and prophylactic regimen intended to achieve high rates of engraftment with minimal graft-versus-host disease (GVHD) in allogeneic transplantation for chronic granulomatous disease in a single center. METHODS: Forty patients, 37 male, with chronic granulomatous disease were transplanted. Transplant products were matched sibling peripheral blood stem cells (PBSCs) in four and matched unrelated donor (MUD) bone marrow in three, and one patient received mismatched unrelated PBSCs...
July 28, 2017: Journal of Clinical Immunology
https://www.readbyqxmd.com/read/28741426/influence-of-different-irradiation-protocols-on-vascularization-and-bone-formation-parameters-in-rat-femora
#10
Ulrike Rottensteiner-Brandl, Luitpold Distel, Martin Stumpf, Tobias Fey, Katrin Köhn, Ulf Bertram, Lara F Lingens, Peter Greil, Raymund E Horch, Andreas Arkudas
Aim of the present study was the establishment of an efficient and reproducible model for irradiation of rat femora as a model for impaired osteogenesis and angiogenesis. Four different irradiation protocols were compared: single irradiation of the left femur with 20 Gy and explantation after 4 or 8 weeks (group A, B) and three irradiation fractions at 3-4 days intervals with 10 Gy and explantation after 4 or 8 weeks (group C, D). The contralateral, unirradiated femur served as control. Evaluation included histology, microcomputertomography (μCT), and real-time polymerase chain reaction...
September 14, 2017: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/28711727/a-chemotherapy-only-regimen-of-busulfan-melphalan-and-fludarabine-and-rabbit-antithymocyte-globulin-followed-by-allogeneic-t-cell-depleted-hematopoietic-stem-cell-transplantations-for-the-treatment-of-myeloid-malignancies
#11
Barbara Spitzer, Ann A Jakubowski, Esperanza B Papadopoulos, Kirsten Fuller, Patrick D Hilden, James W Young, Juliet N Barker, Guenther Koehne, Miguel-Angel Perales, Katharine C Hsu, Marcel R van den Brink, Nancy A Kernan, Susan E Prockop, Andromachi Scaradavou, Hugo Castro-Malaspina, Richard J O'Reilly, Farid Boulad
We sought to develop a myeloablative chemotherapeutic regimen to secure consistent engraftment of T-cell depleted (TCD) hematopoietic stem cell transplantations (HSCT) without the need for total body irradiation, thereby reducing toxicity while maintaining low rates of graft-versus-host disease (GVHD) and without increasing relapse. We investigated the myeloablative combination of busulfan (Bu) and melphalan (Mel), with the immunosuppressive agents fludarabine (Flu) and rabbit antithymocyte globulin (r-ATG) as cytoreduction before a TCD HSCT...
July 12, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28706973/splenocyte-infusion-and-whole-body-irradiation-for-induction-of-peripheral-tolerance-in-porcine-lung-transplantation-modifications-of-the-preconditioning-regime-for-improved-clinical-feasibility
#12
Katharina Jansson, Karla Dreckmann, Wiebke Sommer, Murat Avsar, Jawad Salman, Thierry Siemeni, Ann-Kathrin Knöfel, Linda Pauksch, Jens Gottlieb, Jörg Frühauf, Martin Werner, Danny Jonigk, Martin Strüber, Axel Haverich, Gregor Warnecke
BACKGROUND: Preoperative low-dose whole-body irradiation (IRR) with 1.5 and 7 Gy thymic IRR of the recipient, combined with a perioperative donor splenocyte infusion lead to reliable donor specific peripheral tolerance in our allogeneic porcine lung transplantation model. To reduce the toxicity of this preconditioning regime, modifications of the IRR protocol and their impact on allograft survival were assessed. METHODS: Left-sided single lung transplantation from major histocompatibility complex and sex mismatched donors was performed in 14 adult female minipigs...
July 2017: Transplantation Direct
https://www.readbyqxmd.com/read/28696051/unexpected-acute-renal-injury-after-high-dose-etoposide-phosphate-and-total-body-irradiation-in-children-undergoing-hematopoietic-stem-cell-transplantation
#13
C Cordero, C Loboda, I Clerc-Urmès, L Clément, C Pochon, P Chastagner
High-dose etoposide phosphate, a water-soluble prodrug of etoposide, may be used after total body irradiation (TBI) in pediatric allogeneic bone marrow transplantation for lymphoblastic leukemia. In a retrospective study of 21 children treated at the Nancy University Hospital (2000-2014), we identified unprecedentedly an unexpectedly high incidence (57%) of acute renal injury following etoposide phosphate infusion. Patients who developed renal function impairment experienced more severe mucositis but had outcomes similar to those who did not...
July 11, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28684372/umbilical-cord-blood-transplantation-in-children-with-acute-leukemia-impact-of-conditioning-on-transplantation-outcomes
#14
Mary Eapen, Joanne Kurtzberg, Mei-Jie Zhang, Gareth Hattersely, Mingwei Fei, Adam Mendizabal, Ka Wah Chan, Satiro De Oliveira, Kirk R Schultz, Donna Wall, Mary M Horowitz, John E Wagner
The Blood and Marrow Transplant Clinical Trials Network (BMT CTN 0501) randomized children with hematologic malignancies to transplantation with 1 or 2 cord blood units (UCB) between 2006 and 2012. While the trial concluded that survival was similar regardless of number of units infused, survival was better than previously reported. This prompted a comparison of survival of trial versus nontrial patients to determine the generalizability of trial results and whether survival was better because of the trial treatment regimen...
October 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28680278/current-practice-in-total-body-irradiation-results-of-a-canada-wide-survey
#15
R C N Studinski, D J Fraser, R S Samant, M S MacPherson
BACKGROUND: Total-body irradiation (tbi) is used to condition patients before bone marrow transplant. A variety of tbi treatment strategies have been described and implemented, but no consensus on best practice has been reached. We report on the results of a survey created to assess the current state of tbi delivery in Canada. RESULTS: A 19-question survey was distributed to 49 radiation oncology programs in Canada. Responses were received from 20 centres, including 12 centres that perform tbi...
June 2017: Current Oncology
https://www.readbyqxmd.com/read/28668491/validation-of-the-hematopoietic-cell-transplantation-specific-comorbidity-index-in-nonmyeloablative-allogeneic-stem-cell-transplantation
#16
Muthu Veeraputhiran, Lingyao Yang, Vandana Sundaram, Sally Arai, Robert Lowsky, David Miklos, Everett Meyer, Lori Muffly, Robert Negrin, Andrew Rezvani, Judith Shizuru, Wen Kai Weng, Laura Johnston
The Hematopoietic Cell Transplantation (HCT)-Specific Comorbidity Index (HCT-CI) has been extensively studied in myeloablative and reduced-intensity conditioning regimens, with less data available regarding the validity of HCT-CI in nonmyeloablative (NMA) allogeneic transplantation. We conducted a retrospective analysis to evaluate the association between HCT-CI and nonrelapse mortality (NRM) and all-cause mortality (ACM) in patients receiving the total lymphoid irradiation and antithymocyte globulin (TLI/ATG) NMA transplantation preparative regimen...
June 28, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28652564/risk-factors-for-graft-versus-host-disease-after-transplantation-of-hematopoietic-stem-cells-from-unrelated-donors-in-the-china-marrow-donor-program
#17
Fan Yang, Daopei Lu, Yu Hu, Xiaojun Huang, He Huang, Jing Chen, Depei Wu, Jianmin Wang, Chun Wang, Mingzhe Han, Hu Chen
BACKGROUND We identified risk factors for acute and chronic graft-versus-host disease (aGVHD and cGVHD, respectively) in recipients after hematopoietic stem cell transplantation (HSCT) from unrelated donors in the China Marrow Donor Program (CMDP). MATERIAL AND METHODS We analyzed follow-up clinical information from 1824 patients who underwent HSCT between 2001 and 2010. RESULTS The incidence of aGVHD and cGVHD after transplantation was 49.29% and 27.3%, respectively. aGVHD incidence decreased as HLA matching increased (p<0...
June 27, 2017: Annals of Transplantation: Quarterly of the Polish Transplantation Society
https://www.readbyqxmd.com/read/28614903/thiotepa-based-conditioning-versus-total-body-irradiation-as-myeloablative-conditioning-prior-to-allogeneic-stem-cell-transplantation-for-acute-lymphoblastic-leukemia-a-matched-pair-analysis-from-the-acute-leukemia-working-party-of-the-european-society-for
#18
Sandra Eder, Jonathan Canaani, Eric Beohou, Myriam Labopin, Jaime Sanz, William Arcese, Reuven Or, Juergen Finke, Agostino Cortelezzi, Dietrich Beelen, Jakob Passweg, Gerard Socié, Gunhan Gurman, Mahmoud Aljurf, Matthias Stelljes, Sebastian Giebel, Mohamad Mohty, Arnon Nagler
The optimal conditioning regimen to employ before hematopoietic stem cell transplantation in acute lymphoblastic leukemia (ALL) is still undecided, and while cyclophosphamide/total body irradiation (Cy/TBI) is the most commonly used myeloablative regimen, there are concerns regarding long-term toxicity for patients conditioned with this regimen. Thiotepa-based conditioning is an emerging radiation-free regimen with recent publications indicative of comparable clinical outcomes to TBI-based conditioning. In this analysis of the acute leukemia working party of the EBMT, we performed a retrospective matched-pair analysis, evaluating the outcome of adult patients with ALL who received thiotepa-based conditioning (n = 180) with those receiving Cy/TBI conditioning (n = 540)...
June 14, 2017: American Journal of Hematology
https://www.readbyqxmd.com/read/28554856/beneficial-role-of-low-dose-antithymocyte-globulin-in-unrelated-stem-cell-transplantation-for-adult-patients-with-acquired-severe-aplastic-anemia-reduction-of-graft-versus-host-disease-and-improvement-of-graft-versus-host-disease-free-failure-free-survival
#19
Sung-Soo Park, Dae Hun Kwak, Young-Woo Jeon, Jae-Ho Yoon, Sung-Eun Lee, Byung-Sik Cho, Ki-Seong Eom, Yoo-Jin Kim, Hee-Je Kim, Seok Lee, Chang-Ki Min, Seok-Goo Cho, Dong-Wook Kim, Woo-Sung Min, Jong Wook Lee
Stem cell transplantation (SCT) from an unrelated donor (URD) is often considered in patients with severe aplastic anemia (SAA) whom immunosuppressive therapy failed and matched sibling donor is not available. To reduce the incidence of graft-versus-host disease (GVHD) in URD SCT, introducting antithymocyte globulin (ATG) into the conditioning regimen has been proposed. Although ATG was shown to play a role in reducing GVHD in a cohort with diverse hematologic diseases, its role in SAA remains uncertain. The aim of this study was to determine the efficacy and toxicity of ATG in URD SCT for adult patients with SAA...
September 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28554508/-28-si-total-body-irradiation-injures-bone-marrow-hematopoietic-stem-cells-via-induction-of-cellular-apoptosis
#20
Jianhui Chang, Wei Feng, Yingying Wang, Antiño R Allen, Jennifer Turner, Blair Stewart, Jacob Raber, Martin Hauer-Jensen, Daohong Zhou, Lijian Shao
Long-term space mission exposes astronauts to a radiation environment with potential health hazards. High-energy charged particles (HZE), including (28)Si nuclei in space, have deleterious effects on cells due to their characteristics with high linear energy transfer and dense ionization. The influence of (28)Si ions contributes more than 10% to the radiation dose equivalent in the space environment. Understanding the biological effects of (28)Si irradiation is important to assess the potential health hazards of long-term space missions...
May 2017: Life Sciences in Space Research
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