The Health Risks of Extraterrestrial Environments
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NASA Space Radiation Summer School
2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017

30th Space Radiation Investigators' Workshop (2019)
29th Space Radiation Investigators' Workshop (2018)
28th Space Radiation Investigators' Workshop (2017)
27th Space Radiation Investigators' Workshop (2016)
26th Space Radiation Investigators' Workshop (2015)

Under construction

Cancer Risk I Sessions
Cancer Risk II Sessions
Cancer NSCOR I Sessions
Cancer NSCOR II Sessions
The Radiation Carcinogenesis Specialized Center of Research
Emory NSCOR Overview Progress
Characterization of the Tumor Sepctrum Arising in HZE Ion Irradiated Outbred Mice
In Vivo Induction of Aberrant Patterns of DNA Methylation and Chromosome Instability in Hematpoietic Stem/progenitor Cells (HSPCs) by Silicon (28Si) Ions
Functional Role of BCL2 in Regulating the Repair of the HZE Particle-Induced DNA Damage
mBand Analysis of Late Chromosome Aberrations in Human Lymphocytes Induced by Low- and High-LET Radiation
Update of Harderian Gland Tumorigenesis: Low-Dose- and LET-Response
Micronucleus Formation in Human Skin Kerationcytes Exposed to Different Radiation Qualities in 2D and in 3D
Exposure to 56 Radiation Induces Persistently Increased Serum Levels of Known Colorectal Cancer Biomarkers in C67BL/6J Mice
Long-term Differential Changes in Mouse Intestinal Metabolomics after γ and Heavy Ion Radiation Exposure
The Contribution of Non-Targeted Effects in HZE Cancer Risk
Smad7 Foci Present in Micronuclei Induced by Heavy Particle Radiation
Development of a Risk Assessment Model for Lung Cancer Pathogenesis After Exposure of Human and Mouse Lung Epithelial Cells to HZE Particle Radiation
Biological Countermeasures of Space Radiation-induced Invasive Carcinomas in Mouse Models of Lung and Colon Cancer
Duke NSCOR: Lung Cancer Risk from HZE Ions

Poster Session I
Poster Session II
Fractionated Protons and HZE Radiation to Rat Spinal Cords Increases Base Exicision Repair, Induces Demyelination, Neuro-Inflammation in Brain, Cognitive Deficits and Non-Targeted Tumor Induction
Persistent Changes in Neuronal Structure and Synaptic Plasticity Caused by Proton Irradiation
Deletions of Ink4, Arf, p53, or Pten Cooperate with HZE Particle-Induced DNA Double-Strand Breaks to Trigger High Grade Gliomas in Mouse Models
Using EUD4TEA as the Active Element for Space-Based Radiation Sensors
Development of Cognitive Performance Decrements as a Function of Time Following Exposure to HZE Particles
Induction of Radiation Signature Mutations In Vivo with Charged Particles at Low Fluence
Space Radiation Induced Neuroinflammation on Alzheimer and Parkinson Disease Pathology
Suppression of Genome Instability in Response to Space Radiation is Mediated by Fanconi Anemia Pathway
Low Dose Space Radiation Affects Long-Term Survival of Bone Marrow Progenitor Cell Populations
Effects of Combined Proton and 56Fe Irradiation on Hippocampal Function
Inflammatory Responses and Aberrant Patterns of DNA Methylation in the Liver of Mice Exposed Whole-Body to Titanium (48Ti) Ions
A Genomic Stress Response as a Novel Mechanism Leading to Chromosomal Instability in Heavy Particle-Irradiated Cell Populations
Applying Lessons Learned from Clinical Radiotherapy to Improve Biophysical Modeling of Clinical Outcomes Used to Guide Management and Countermeasures Following Acute Radiation Exposures
Individual Differences in Neurobehavioral Deficits Following Proton Irradiation are Related to Differential Brain Protein and Cytokine Expression
The Role of Persisting Phenotypes on Radiation-Induced Genomic Instability
Effects of 28Si Radiation on Neurobehavioral Function
Development of a New Improved Biodosimetry Method for Measuring Previous Exposure to HZE Radiation
Autosomal Mutants of Proton-Exposed Kidney Cells Display Loss of Heterozygosity on Other Chromosomes
Protons and HZE Radiation Affect Hippocampal Functions in APP/PSEN1 Transgenic Mice
Radiation Quality Effects on Transcriptome Profiles in 3-D Cultures After Charged Particle Irradiation
The Role of the Bone Marrow Microenvironment in Space Radiation-Induced Leukemogenesis
An Extra Copy of p53 Suppresses Initiation of Kras-Driven Tumors but not Radiation-Induced Lymphomas
Effects of Heavy-Ion Irradiation on Ex Vivo Osteoblastogenesis, Oxidative Stress Response, and Cancellous Bone Microarchitecture
High LET Radiation Produces Sustained DNA Damage Signaling and Changes Cellular Homeostasis in Hippocampal Neuronal Cells
Role of Age, Radiation Quality and Genetic Background on Levels of Surrogate Cancer Biomarkers
The Tumor Suppressor P53 Acts During Total-Body Irradiation to Decrease Hematopoietic Stem/Progenitor Cell Fitness and to Promote Lymphoma Development
Fractionated High LET Iron Irradiation Effects on K-RasG12D-Induced Tumor Progression
The Radioresponse of Normal Human Bronchial Epithelial Cells to Charged Particle Exposures of Increasing Mass, Energy and LET
High LET 56Fe Ion Irradiation Induces Tissue Specific Changes in DNA Methylation in the Mouse

Translocator Protein 18 kDa (TSPO), a Potential In-Vivo Biomarker of Space Radiation Induced CNS Injury
Role of NADPH Oxidase in Low-Dose Radiation-Induced Neurovascular Remodeling in Mouse Hippocampus
Radiation-Induced Alterations in Synaptic Transmission of Dentate Granule Neurons Depend on the Dose and Species of Charged Particles
Effects of Space Radiation on Hippocampal-Dependent Learning and Neuropathology in Wild-Type and Alzheimer's Disease Transgenic Mice
Charged Particle Radiation, Reactive Oxygen Species, and CNS Function
Reliability of the Disruptive Effects of Exposure to Protons on Neurocognitive Performance
Charged Particle Radiation, Reactive Oxygen Species, and CNS Function
Functional Effects of Proton Radiation on Synaptic Transmission and Plasticity in the Hippocampus of APP/PSEN1 Transgenic Mice
Radiation-Induced Suppression of LTP is Associated with Altered Intrinsic Membrane Properties in Hippocampal CA1 Neurons
Fractionated Ionizing Radiation Skews Differentiation of Glial/Oligodendrocyte Progenitor Cells and Induces Cognitive Defects
Functional Effects of Proton, Silicon and Iron Radiation on Synaptic Excitability in the Mouse Hippocampus

Low Doses of Proton Radiation Do Not Induce Spatial Learning or Memory Deficits in a Mouse Model of Alzheimer's Disease
Modeling Cell-Intrinsic Effects of Low vs High LET Ionizing Radiation on Lung Epithelial Progenitor Cells
The Mechanism and Treatment of Coagulopathy in Proton Irradiated Ferrets
Role of p53 in Lung Carcinogenesis After Exposure to Space Radiation
Heterozygous Deletions of p53 and PTEN Cooperate with DNA Damage Induced by Fe Ions to Trigger High Grade Gliomas in Mouse Models
Long-Term Effects of a Single Exposure of the Vertebrate Embryo to High Charge and Energy (HZE) Particle Radiation
A Systems Genetic Analysis of Susceptibility to Development of Tumors Induced by High LET Radiation
Consequences of Low-Dose HZE Irradiation in the Cortical Bone of Aged Mice
Student Poster Contest Winners

Introduction to THREE
Walter Schimmerling

Radiation tracks and radiation track simulation video
Ianik Plante, Ph.D.
Universities Space Research Association
Division of Space Life Sciences
NASA Johnson Space Center
Houston, Texas

Radiation tracks and radiation track simulation video is excerpted from the article:
Radiation chemistry and oxidative stress (PDF)
Ianik Plante, Ph.D.

Video Presentation of
Space Radiation and Cataracts
Eleanor Blakely
Life Sciences, Lawrence Berkeley National Laboratory
Berkeley, California
July 16, 2003

Thomas B. Borak, Ph.D 1942-2021
We mourn the death of Professor Thomas B. Borak, Ph.D on January 25, 2021. Tom was a long time Professor of Health Physics in the Department of Environmental and Radiological Health Sciences at Colorado State University. He was a highly regarded instructor at the NASA Space Radiation Summer School and an active space radiation research investigator, most recently assisting in research to develop radiation monitors for use by NASA astronauts. An obituary may be found at

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R. J. Michael Fry, MD 1925-2017
We were greatly saddened to learn that R.J. Michael Fry died peacefully Friday evening (November 24, 2017) at age 92 due to the rupture of an abdominal aortic aneurysm. He and his wife Shirley, 3 sons and their families and 8 grandchildren had just celebrated Thanksgiving together the day before. It is indeed sad news: Michael was a source of inspiration for all of us who were fortunate enough to know him, a model of scientific integrity and graciousness, quite apart from his widely recognized qualities as a scientist. He contributed to THREE for many years. and was an Associate Editor for many of them. His death is a loss to the world scientific community, to which he made many signal contributions as a radiobiologist and to NASA in particular, for which he oversaw the generation of guidelines for radiation protection in space over several decades.


[For a more extensive obituary, xf. John D. Boice Jr., Amy Kronenberg, and Robert L. Ullrich "R. J. Michael Fry, MD 1925-2017," Radiation Research 189(1), 1-4, (1 January 2018).]
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James M. Slater, MD (1929-2018)
James M. Slater, MD, who pioneered the world's first hospital-based proton treatment center at Loma Linda University Health, died December 26, 2018. He was 89. He is survived by his wife of 70 years, Mary JoAnn Strout, and by his five children, Jim, Julie, Jan, Jerry, and Jon, 14 grandchildren, and 18 great-grandchildren. He was a devoted husband and father.

James Munroe Slater was born in 1929 in Salt Lake City, Utah. He graduated from the University of Utah, in 1955 with a bachelor's degree in physics, and obtained his M.D. from the Loma Linda University School of Medicine in 1963. He trained as a resident at both LDS Hospital in Utah and White Memorial Medical Center in Los Angeles and completed a National Institutes of Health Fellowship at University of Texas MD Anderson Cancer Center. He accepted the invitation to return to Loma Linda University Health in 1970 and chaired the Department of Radiation Medicine at Loma Linda University for more than 20 years.

The James M. Slater, M.D. Proton Treatment and Research Center - which opened in 1990 - has since treated more than 18,000 patients from around the world. When the Loma Linda University Medical Center Proton Treatment Center opened in 1990, it was the only place in the world to offer proton therapy for patient treatment and research in a hospital setting. It would remain the only hospital-based treatment center of its kind in the United States until 2003. In 2007, it was renamed the James M. Slater, M.D. Proton Treatment and Research Center in his honor. Today there are approximately 25 proton therapy centers in operation, with another 11 centers under construction or in development, according to the National Association for Proton Therapy.

Slater described the compassion he felt for his patients in a documentary, The Convergence of Disciplines. During his residency training in radiology, he said, "[It] was a shocking experience to see how ill we made our patients. During treatment they became very, very sick. Some of them had to stop treatment and recuperate for a week or so before they could come back. This reduced their chance for a cure and caused misery for them as an individual and for their family."

Slater also maintained an enthusiastic interest in space radiation problems. He enjoyed telling the story of how he had lunch with one of us (WS) in the basement restaurant of the Hamburg City Hall, where we both were attending the 30th Scientific Assembly of the Committee for Space Research (COSPAR), in July 1994 and we realized that NASA and Loma Linda had essentially complementary interests.

At the time, NASA was seriously concerned about access to a charged particle accelerator capable of simulating the space radiation environment. The only particle accelerator capable of delivering the full spectrum of particles present in space, the Berkeley BEVALAC, was shut down by DOE, and budget for NSRL had not yet been approved. LLU beams were capable of providing some of the knowledge required, especially with relation to solar particle events whose major impact is on EVAs.

LLU had established a superb clinical facility, but needed to develop the research capability required to provide a scientific basis for treatment planning. The relevant radiobiology has significant overlap with the radiation biology required to predict the risks to astronauts exposed to space radiation.

Accordingly, as a result of this conversation, Slater and Schimmerling initiated a Memorandum of Agreement between NASA and Loma Linda University, concerning cooperation in radiation biology and physics and their application to medicine. It was signed, in December 1994, by Joan Vernikos, Director of the NASA Life and Biomedical Sciences and Applications Division, and by David B. Hinshaw, Sr. President, Loma Linda University Medical Center, with the Loma Linda Congressional Representative, the Hon. Jerry Lewis, attending. The main objectives of this MOA were to provide access to accelerated proton beams and related research laboratories for NASA-sponsored investigators; provide for contribution of NASA-sponsored investigators to the academic and educational programs of LLU; and, to facilitate transfer of technical expertise between NASA and LLU in areas of radiation physics and radiation biology.

These objectives were achieved, as LLU has provided, and continues to provide, beams for NASA investigators, including a successful series of studies of space suits. A major contribution has also been coordination between LLU and NSRL hardware, so that experiments can be conducted at either laboratory using the same irradiation equipment. LLU has achieved a credible research capability, as evidenced by successful competition for NASA research grants by their scientists. The LLU Medical Center and investigators working there continue to make significant contributions to the NASA Space Radiation Program Element under the guidance of Nelson, who was recruited from the Jet Propulsion Laboratory and who led the early development of the current LLU research capability.

None of this would have been possible without the determination of a soft-spoken, gentle, modest man of far-reaching vision, James Slater. He was a visionary, a pioneer, and a medical and scientific leader. He was also, I am humbly proud to say, a teacher and a friend. He will be sorely missed.

Walter Schimmerling
Gregory A. Nelson
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David Boothman, Ph.D. (1958-2019)
We are saddened to learn that our longtime Associate Editor, David Boothman, Ph.D., died from a stroke on November 1, 2019. David was the Sid and Lois Eskenazi Chair of Oncology, Professor of Biochemistry and Molecular Biology, and Associate Director of Translational Research, at the Indiana University Melvin and Bren Simon Cancer Center. An inter-faith memorial service is being planned for spring 2020.

Dr. Boothman grew up in Detroit, Michigan, and earned his B.S. at the University of Michigan-Ann Arbor. He did his graduate work in microbiology and immunology at the University of Miami Medical School, where he received his Ph.D. under the mentorship of Dr. Sheldon Greer. His research focused on the biochemistry and pharmacology of anticancer drugs, specifically 5-fluoro-deoxycytidine derivatives.

He did postdoctoral research at the Dana-Farber Cancer Institute of Harvard Medical School with Dr. Arthur B. Pardee. There, he investigated changes in several aspects of cancer cells before and after cell stress: cell cycle checkpoint regulation, molecular biology, and gene expression. His studies on β-lapachone as a radiosensitizer and DNA repair inhibitor began at this time. Dr. Boothman also discovered and cloned the first proteins and transcripts induced by ionizing radiation (IR).

In 1990, Dr. Boothman became Assistant Professor at the University of Michigan-Ann Arbor and continued his investigations of x-ray-inducible proteins and x-ray-inducible transcripts leading to proteins. He discovered xip8 (clusterin) and its induction by super-low levels of IR exposure. Dr. Boothman then joined the faculty in the Department of Human Oncology at the University of Wisconsin-Madison, where he rose to Associate Professor with tenure and became the Vice Chairman of Radiation Oncology, and Division Head of Molecular Radiation Oncology.

In 1998, Dr. Boothman accepted an Endowed Professorship at Case Western Reserve University and, in 2005, Dr. Boothman and his close colleague Dr. Jinming Gao moved to the University of Texas Southwestern Medical Center to start the Cell Stress and Cancer Nanomedicine Program.

In 2017, Dr. Boothman moved to his current position at the Indiana University School of Medicine.

David was an Associate Editor of THREE since 2013 and his enthusiasm and wise counsel will be remembered by all of us, who were fortunate to be counted among his friends and colleagues and to be impressed with his scientific acumen and understanding, Those of us who also were privileged to know David through his commitment to teaching on the NASA Summer School were immediately impressed by his keenness to maximize the learning experience for the students, as well as by his well-deserved reputation as a mentor.

Walter Schimmerling
Stanley Curtis
Amelia Eisch
Dudley Goodhead
Marianne B. Sowa
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