F o r m I (underwound families irradiated with fission neutrons at 32OC (in T E buffer) followed the expected expotential dependence on dose. The radiation sensitivity was found to be linearly related t o the average DNA linking difference (DL) with larger DL associated with enhanced r a d i a t i o n sensitivity. WR-33278, a radioprotector, is s h o w n t o s t i m u l a t e e u k a r y o t i ...

Gamma radiation induces pathological changes in the mouse liver which are dose dependent. Ionizing radiation at lower doses causes hematopoietic syndrome, at higher dose causes gastrointestinal syndrome and central nervous syndrome. Radiation causes inactivation of certain enzymes, denaturation of proteins, interruption of mitosis, chromosomal aberration etc. The severity of symptoms increased ...

The radioprotective effect of anthocyanin extracted from Lonicera caerulea var. edulis (ALC), was studied in ICR mice. Different doses of ALC were intragastrically administered to mice once a day, prior to radiation. After two weeks, the mice received a one-time 5 Gy whole body (60)Coγ radiation. The spleen index, thymus index, activities of superoxide dismutase (SOD) and glutathione peroxidase...

Propolis studies in Poland were initiated by Professor Stan Scheller in the 1960s. It was a team of Polish researchers who developed a method of introducing hydrophobic ethanol extracts of propolis (EEP) into aqueous solutions, which enabled the study of their biological properties. The studies performed in Poland showed that EEP possesses antioxidant, radioprotective, and immunostimulating pro...

Cerium oxide nanoparticles (CONPs) have a unique surface redox chemistry that appears to selectively protect normal tissues from radiation induced damage. Our prior research exploring the biocompatibility of polymer-coated CONPs found further study poly-acrylic acid (PAA)-coated was warranted due improved systemic biodistribution and rapid renal clearance. This work explores PAA-CONPs’ radiopro...

Background: Development of safe radioprotector is a challenging task. In this study radioprotective effect of sucrose has been demonstrated in calf thymus DNA (CtDNA). Sucrose is a free radical scavenger and also acts as osmolyte and therefore can influence the water activity around DNA and effects of radiation on DNA. Hoechst 33258 was used to probe the possible alteration in physicochemical p...

The hematopoietic syndrome is anticipated when a dose of radiation greater than 100 cGy is received. The resulting clinical situation is life-threatening because of opportunistic infections and gradual decline in immune competency due to irradiation. Because of evidence of a possible immunomodulatory role for cimetidine, an antagonist of histamine H2 receptors, we studied the effects of thi...

Nutmeg, the dried seed kernel of Myristica fragrans, MF (Family: Myristicaceae) possesses antifungal, hepatoprotective and antioxidant properties. Its radioprotective effect against 6, 8 and 10 Gy gamma radiation was evaluated by 30 day survival assay. Regression analysis yielded LD(50/30 )as 6.83 Gy and 8.89 Gy for irradiated only and (MF + radiation) groups, respectively. The dose reduction f...