[Teratogenic effects of incorporated radionuclides].

Experimental data on teratogenic effects induced by incorporated alpha, beta and gamma-emitters were analyzed. It was found that the radioactive substances as well as external irradiation induced teratogenic effects. Teratogenesis caused by incorporated radionuclides has some peculiarities compared to the effect caused by fetus exposure to external radiation.

[Dependence of the therapeutic effectiveness of interleukin-1beta on the time of the drug administration after irradiation of mice].

In experiments on mice F1(CBA x C57BL/6) the dependence of 30th days survival on the time of betaleukin (medicine form of interleukin-1 beta) administering after exposure to 7.5 Gy whole body gamma-irradiation from 137Cs (approximately DL80/30) was studied. Betaleukin was injected subcutaneously in dose 25 mcg/kg 0.

[Study of mechanisms of anti-irradiation effects of interleukin-1beta in long-term bone marrow cultures].

The influence of betaleukin (human recombinant interleukin-1 beta) on the processes of postirradiation recovery of haemopoietic precursors (GM-CFC) and the level of granulocyte-macrophag colony-stimulating factor (GM-CSF) were studied in long-term bone marrow cultures after gamma-irradiation with a dose 2 Gy. Then the betaleukin action on the contents of GM-CFC and induction of GM-CSF in the non irradiated cultures was studied. It was shown that betaleukin increased the induction of GM-CSF and raised the contents of GM-CFC in long-term bone marrow cultures, and the maximal increase of a GM-CSF level and GM-CFC amount was marked in 20 hours after introduction.

[Emotional stress and problems of radiation medicine].

The influence of emotional stress on behaviour and industrial activity of man as well as on the development of posttraumatic stressful frustration and other disorders is considered in connection with real or possible action of ionizing radiation, and on the course of radiation injuries. It is shown that a problem of emotional stress and radiation safety are closely connected. The study is important for solving problems facing emergency medicine.

[Pro and contra regarding the threshold/non-threshold mutagenic (carcinogenic) action of low-level ionizing radiation].

According to the analysis of epidemiological and experimental data there are evidences in threshold on criterion of mutagenic (in broad sense) ionising radiation action. A threshold takes place in the region of about 20-200 mGy concerning a dose in case of an acute exposure and in the region of the third order above a background level regarding a dose rate in case of chronic or prolonged exposure. Evidences in favour of linear non-threshold conception are based on primitive mathematical extrapolations and approximations of the study results, mainly, in the region of intermediate doses/dose rates.

[Problems of radiobiology and p53 protein].

The data about the structure and the mechanisms of participation of p53 protein in regulation of the cell cycle checkpoints, DNA repair and apoptosis in normal conditions and after ionizing irradiation are considered. The double strand break of DNA, as a signal of radiation damage, lead to binding of ATM protein with DNA, to appearance of the protein kinase activity at the ATM protein, that after phosphorylation of p53 protein lead to its stabilization and activation. It is noted, that the p53 protein is an integrator of environmental lesion signals, which triggers the transcription, that activate or inhibite the synthesis of protein factors leading to cell cycle arrest in the checkpoints, to increase of DNA repair or to apoptosis.

[Mobile communication: radiobiology problems and evaluation of danger].

Generalized data on the influence of EMF of cellular telephones on the users and evaluation of danger of electromagnetic fields of base stations of telecommunications for the population are submitted.

[A possibility to predict the severity of individual damage following the exposure to supralethal radiation dosage. Prediction of working capacity of irradiated rats and dogs by response to pre-exposure hypobaric load].

In experiments on rats and dogs exposed to radiation doses which cause intestinal and cerebral forms of radiation sickness, hypobaric hypoxia used as an unconventional test of animals' reactivity has enabled the relationship between reactivity and radiosensitivity to be established. Higher post-radiation efficiency is observed in animals with less pronounced changes during a barotest. The goodness of fit of experimental data to the expected result is up to 70%, rising if a set parameters for one index or the sum total of indices are used.

[A possibility to predict the severity of individual damage following the exposure to supralethal radiation dosage. Prediction of the clinical manifestation of radiation injury in laboratory animals by response to pre-exposure hypobaric hypoxia].

The experiments on rats, dogs and monkeys exposed to radiation doses which cause intestinal and cerebral forms of radiation sickness have shown that the severity of a clinical state can be predicted by cardiovascular and endocrine changes when a pre-exposure test with moderate hypobaric hypoxia is performed. The goodness of fit of experimental data to the exposed result is up to 60-80%, still rising if a set of indices of the neuroendocrine status is used.

[A possibility to predict the severity of individual damage following the exposure to supralethal radiation dosage. Prediction of working capacity of irradiated rats and dogs by response to pre-exposure physical load].

The experiments on rats and dogs exposed to radiation doses which cause intestinal and cerebral forms of radiation sickness have shown that, within the first 24 hours post-exposure, efficiency impairment can be predicted by changes in some indices of the cardiovascular and endocrine systems after physical load used as a non-radiation testing agent. The goodness of fit of experimental data to the expected result is up to 50-70%, still rising if a number of indices for different sections of the neuroendocrine system are used at a time.

[A possibility to predict the severity of individual damage following the exposure to supralethal radiation dosage. Prediction by early radiation response ].

The experiments on dogs and monkeys have shown that the severity of radiation sickness following the exposure to supralethal radiation doses can be predicted by early response of an individual. For such prediction, the most informative criteria include general severity of clinical manifestations during primary radiation response and evaluated within a few post-damage hours, the degree of tension in cardiac rhythm control, the cortisol level, the endocrine status index.

[State of hemopoiesis under exposure to low doses of ionizing radiation and emotional stress during treatment with anxiolytic aphobazole].

In experiments on rats it was found that aphobazole administered before emotional stress is capable to stop violations of adaptive reactions and compensator capabilities of a hemopoietic system in conditions of development of an emotional stress in early terms after gamma-irradiation with a dose of 0.9 Gy.

[Experimental study of combined effect of actoprotectors and radioprotectors in radiation injury].

Combined treatment of mice and dogs with actoprotector bimethyl and radioprotector indralin suppressed radioprotective action of the latter, the surveillance being decreased from 83.3 to 14.3% in dogs and from 70.

[Efficiency of polysaccharide translam for early treatment of acute radiation illness].

Antiradiation therapeutic efficiency of translam (1-->3; 1-->6-beta-D-glucan) produced by enzymatic synthesis out of laminarin, polysaccharide of Laminaria cychorioides, has been studied in four animal species (mice, guinea-pigs, dogs, monkeys). A stable curative effect has been observed following its administration within first 24 h after radiation exposure at doses that cause acute radiation sickness (about LD90). The preparation is nontoxic and has a broad therapeutic range which permits its practical application.

[Treatment of infectious complications of experimental acute radiation injury with combined antibiotic sulacillin].

An anti-infectious effect of sulacillin (ampicillin/sulbactam) is higher than that of ampicillin in treatment of irradiated mice infected with a beta-lactamaseproducing strain of Kl. pneumoniae. Involving of sulacillin as a principal antibiotic into the therapeutic scheme for acute radiation sickness results in 67% dogs survival at LD90/45.

[Advances and prospects of a combined therapy of acute radiation injury in experiments].

We present the results of a long-standing experimental development of ways and means for acute radiation sickness treatment that have been authorized for application in medicine and are mostly aimed at large-scale accidental injuries. The paper describes means for early treatment (prodigiosan, desoxynate, typhoid vaccine, proteus vaccine), a myeolopoiesis stimulant (estradiol dipropionate), a detoxication procedure (hemosorption), substitution therapy with bone marrow cells and peripheral blood mononuclears, anti-infectious schemes comprising antibiotics and polyvitamins.

[The study of mechanisms of radioprotective action of indometofen n hematopoietic stem cells in mouse long-term bone marrow cultures].

The influence of indometophen (an analog of tamoxiphen) on the dynamic content and the proliferative activity of CFUs (colony-forming units) and CFU-GM (granulocyto-macrophages precursors) and the level of colony-stimulating factor (GM-CSF) in mouse long-term bone marrow cultures were studied for 4 weeks after administration. Five days after indometophen injection the long-term cultures were exposed to irradiation with a dose of 2 Gy and on the time course of postirradiation recovery haemopoietic precursors cells and dynamic release of GM-CSF in the culture supernatants were examined. The data of this report suggest that the mechanisms responsible for the radioprotective action of indometophen may be associated both with its direct effects on the proliferation and differentiation of hemopoietic cellular precursors and with the stimulation of release of growth-differential factors by hemopoietic microenvironmental elements.

[Analysis of pulsed bioelectric activity of rabbit cerebral cortex in response to low-intensity microwave radiation].

In experiments on 22 rabbits the influence of a pulse microwave irradiation on extracellular activity of separate nervous cells of sensorimotori and occipital areas of a cortex brain is shown. The reaction could consist in activation or in braking frequency of the discharges, that was connected to frequency impulsation in an initial background. The researched mode of a microwave irradiation (1.

[Features of radiation carcinogenesis in man at low doses and low dose rates].

The accepted linear no-threshold (LNT) dose response for stochastic effects is not valid even for the cellular level. Published data on the human radiation carcinogenesis demonstrate now the radiation hormesis or the absence of effects or its reduction in the whole low dose interval when a dose rate is decreased. This is demonstrated for leukemia and for lung, breast, thyroid, bone, skin and liver solid cancers, for such organs, which are responsible in the more, than 1/2 of cancer detriment postulated by the ICRP.

[Forming of memory (imprinting) in chicks after prior low-level exposure to electromagnetic fields].

EMF of power density from 0.4 to 10 mW/cm2 can influence forming the memory (imprinting). Showed the possibility to fix EMF modulated in embryonic brain during the natal period and conservation of this information after birth.