Combined modality radioprotection: The use of glucan and selenium with WR-2721

Journal Article · Tue May 01 00:00:00 EDT 1990 · International Journal of Radiation Oncology, Biology and Physics; (USA)

DOI:https://doi.org/10.1016/0360-3016(90)90442-M· OSTI ID:6704012

Patchen, M L; MacVittie, T J; Weiss, J F ^[1]

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1. Armed Forces Radiobiology Research Institute, Bethesda, MD (USA)

Glucan, WR-2721, and selenium, three agents with distinct radioprotective mechanisms, were evaluated in C3H/HeN mice for survival-enhancing and hemopoietic-regenerating effects when administered alone or in combinations before exposure to 60Co radiation. At LD50/30 radiation doses (radiation doses lethal for 50% of mice within 30 days postexposure), dose reduction factors of 1.21, 1.02, 1.37, 1.51, and 1.66 were obtained following glucan (75 mg/kg i.v., -20 hr), selenium (0.8 mg/kg, i.p., -20 hr), WR-2721 (200 mg/kg, i.p., -30 min), glucan + WR-2721, and glucan + selenium + WR-2721 treatments, respectively. All treatments increased numbers of hemopoietic stem cells as measured by the day 12 endogenous spleen colony-forming unit (E-CFU) assay; the most significant E-CFU effects, however, were observed following glucan + WR-2721 and glucan + selenium + WR-2721 treatments. Combined modality treatments were also more effective than single-agent treatments at accelerating bone marrow and splenic granulocyte-macrophage colony-forming cell (GM-CFC) regeneration. These results demonstrate the value of multiple-agent radioprotectants.

• OSTI ID: 6704012
• Journal Information: International Journal of Radiation Oncology, Biology and Physics; (USA), Vol. 18:5; ISSN 0360-3016
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
PROTEINS
RADIOSENSITIVITY EFFECTS
RADIOPROTECTIVE SUBSTANCES
EVALUATION
SELENIUM
BONE MARROW CELLS
COBALT 60
COLONY FORMATION
MICE
RADIATION INJURIES
SPLEEN CELLS
SYNERGISM
ANIMAL CELLS
ANIMALS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOLOGICAL EFFECTS
BIOLOGICAL RADIATION EFFECTS
COBALT ISOTOPES
CONNECTIVE TISSUE CELLS
DRUGS
ELEMENTS
INJURIES
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MAMMALS
MINUTES LIVING RADIOISOTOPES
NUCLEI
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
RADIATION EFFECTS
RADIOISOTOPES
RODENTS
SEMIMETALS
SOMATIC CELLS
VERTEBRATES
YEARS LIVING RADIOISOT
560152* - Radiation Effects on Animals- Animals