IN comparative studies of the mutagenic action of ionizing and ultraviolet radiation on conidia of the fungus Glomerella (5) it was evident that the shape of the mutation curve was different for the two types of radiation. The dose-mutation curve for the surviving spores was essentially linear for the ionizing radiations, but with the ultraviolet radiation the mutation curve rose with increasin...

Background: The effect of low dose radiation on immune system is shown. Ionizing radiation can affect cytokine production and polarization of T helper cells. Objective: The current study focused on ionizing radiation in Ukrainian children residing in a contaminated area with clinical irritable bowel syndrome. Method: Our study included 75 rural children population aged 4-18 yrs, who lived in a ...

To understand the potential impact on risk from exposure to low-level ionizing radiation, we have investigated the modulation of gene expression, induction of DNA damage and of neoplastic transformation in human or rodent cells derived from cultures exposed in vitro to low dose gamma-rays (a low linear energy transfer radiation) or very low fluences of alpha-particles (a high linear energy tran...

We report molecular changes in leaves of rice plants (Oryza sativa L. - reference crop plant and grass model) exposed to ultra low-dose ionizing radiation, first using contaminated soil from the exclusion zone around Chernobyl reactor site. Results revealed induction of stress-related marker genes (Northern blot) and secondary metabolites (LC-MS/MS) in irradiated leaf segments over appropriate ...

The health effects arising from exposure to low doses of ionizing radiation are of particular concern, mainly due to the increased application of diagnostic and therapeutic X-ray modalities. The mechanisms behind the cell and tissue responses to low doses remain to be elucidated. Accumulating evidence suggests that low doses of ionizing radiation induce activation of the immune response; howeve...

A common side effect of radiotherapy used in the treatment of oral cancer is the occurrence of structural and physiological alterations of the salivary glands due to exposure to ionizing radiation, as demonstrated by conditions such as decreased salivary flow. The present study evaluated ultrastructural alterations in the parotid glands of rats receiving a fractionated dose (1,500-cGy) of radia...

Medical imaging procedures with x-ray, computed tomography (CT) and nuclear isotopes use ionizing radiation.1–4 On the other hand, ultrasound and magnetic resonance imaging (MRI) do not. When biological tissues are exposed to radiation, the effects are related to the type of radiation and the amount absorbed. Units of absorbed dose are grays (Gy) (joules/kilogram). One rad (radiation absorbed d...

*Correspon In this issue of Radioprotection, K. Leuraud et al. present a comprehensive update of the main results obtained on mortality in the French cohort of nuclear workers. The publication of this article offers the opportunity to make a point on the current radiation protection system and on the strengths and limitations of epidemiology regarding the health risks associated to ionizing rad...