The targeted aim of Project 4 is to develop therapies to mitigate late effects of radiation on the hematopoietic system. This robust cellular system is damaged by radiation resulting in life-threatening infections, anemia, and bleeding. While the """"""""hematopoietic syndrome"""""""" is well characterized, much less is known about the longterm effects of sublethal radiation on the bone marrow. Our preliminary studies indicate that external sublethal radiation leads to late cytopenias and striking decreases in hematopoietic stem cells (HSC) numbers and function. These preliminary findings support the hypothesis that sublethal external radiation causes significant late marrow injury particularly to the HSC compartment. A bioterrorist attack or nuclear disaster would lead not only to acute external radiation exposure, but also to internal exposure through inhalation and/or ingestion of radioactive particulates. In collaboration with current U19 investigators, we have determined that low dose internal 137Cs, unlike external radiation, causes unexpectedly severe late effects to hematopoietic progenitors. We hypothesize that internal radiation may cause a distinct, previously unexplored pattern of hematopoietic injury. We also hypothesize that combined external plus internal radiation may cause synergistic hematopoietic damage and lead to marrow failure.
In Aims 1 and 2, we will more fully define the late effects of external versus internal versus combined external/internal sublethal irradiation on the stem, progenitor, and peripheral blood cell compartments. A better understanding of the response of the hematopoietic system to irradiation will provide for a rational approach to its mitigation following nuclear accident or attack. The substance P analog, Homspera, has been shown to increase hematopoietic progenitor numbers and protect mice from lethal radiation.
In Aim 3, we will test the ability of Homspera, as well as the antioxidant EUK-207, to mitigate the late effects of radiation-induced injury to the hematopoietic system. During ontogeny, the sites of hematopoiesis transition from yolk sac to fetal liver to postnatal bone marrow.
In Aim 4, we will test the hypothesis that the hematopoietic system is highly vulnerable to radiation injury as it migrates from liver to marrow in the early post-natal period.

Public Health Relevance

Our goals are to better understand the effects of radiation on the blood-forming system and to use this knowledge to test medications to see if they can protect the body from radiation damage. We will also look at the effect of radiation on very young mice to see if they are particularly susceptible to injury.

National Institute of Health (NIH)
National Institute of Allergy and Infectious Diseases (NIAID)
Research Program--Cooperative Agreements (U19)
Project #
Application #
Study Section
Special Emphasis Panel (ZAI1-KS-I)
Project Start
Project End
Budget Start
Budget End
Support Year
Fiscal Year
Total Cost
Indirect Cost
University of Rochester
United States
Zip Code
Begolly, Sage; Olschowka, John A; Love, Tanzy et al. (2017) Fractionation enhances acute oligodendrocyte progenitor cell radiation sensitivity and leads to long term depletion. Glia :
Judge, Jennifer L; Lacy, Shannon H; Ku, Wei-Yao et al. (2017) The Lactate Dehydrogenase Inhibitor Gossypol Inhibits Radiation-Induced Pulmonary Fibrosis. Radiat Res 188:35-43
Domingo-Gonzalez, Racquel; Das, Shibali; Griffiths, Kristin L et al. (2017) Interleukin-17 limits hypoxia-inducible factor 1? and development of hypoxic granulomas during tuberculosis. JCI Insight 2:
Sweet, Tara B; Hurley, Sean D; Wu, Michael D et al. (2016) Neurogenic Effects of Low-Dose Whole-Body HZE (Fe) Ion and Gamma Irradiation. Radiat Res 186:614-623
Moravan, Michael J; Olschowka, John A; Williams, Jacqueline P et al. (2016) Brain radiation injury leads to a dose- and time-dependent recruitment of peripheral myeloid cells that depends on CCR2 signaling. J Neuroinflammation 13:30
Begolly, Sage; Shrager, Peter G; Olschowka, John A et al. (2016) Fractionation Spares Mice From Radiation-Induced Reductions in Weight Gain But Does Not Prevent Late Oligodendrocyte Lineage Side Effects. Int J Radiat Oncol Biol Phys 96:449-457
Groves, Angela M; Johnston, Carl J; Misra, Ravi S et al. (2016) Effects of IL-4 on pulmonary fibrosis and the accumulation and phenotype of macrophage subpopulations following thoracic irradiation. Int J Radiat Biol 92:754-765
Rabender, Christopher; Mezzaroma, Eleonora; Mauro, Adolfo G et al. (2016) IPW-5371 Proves Effective as a Radiation Countermeasure by Mitigating Radiation-Induced Late Effects. Radiat Res 186:478-488
Williams, Jacqueline P; Calvi, Laura; Chakkalakal, Joe V et al. (2016) Addressing the Symptoms or Fixing the Problem? Developing Countermeasures against Normal Tissue Radiation Injury. Radiat Res 186:1-16
Barlow, Margaret L; Cummings, Ryan J; Pentland, Alice P et al. (2016) Total-Body Irradiation Exacerbates Dissemination of Cutaneous Candida Albicans Infection. Radiat Res 186:436-446

Showing the most recent 10 out of 61 publications