[Transmission and exchange of genetic information during bacterial conjugation in ground-based simulations of the factors of orbital flight]. / Peredacha i obmen geneticheskogo materiala pri bakterial'noi kon"iugatsii v nazemnykh éksperimentakh, imitiruiushikh usloviia orbital'nogo poleta.

Control laboratory experiments on bacterial conjugation under simulated spaceflight conditions were performed with the use of new equipment (bioreactor RECOMB-2 and container BIOMAGNISTAT) within the RSA-NASA science program. External parameters were selected and the plan of simulation of a space experiment was verified to ensure high efficiency of the conjugative transfer of chromosomal and plasmid DNA and storage of hybrids on the ground. Genetic analysis of conjugative hybrids E. coli supported the hypothesized possibility of transfer of a whole bacterial chromosome during conjugation that will lead to relative stabilization of the diploid state. Earlier this hypothesis was used to interpret results of experiments performed on MIR in 1992-1993. Hence, the ground laboratory investigations proved the conclusion about high probability of transfer of large fragments or even a whole chromosome during space flight. Screening of the geomagnetic field by BIOMAGNISTAT increases the probability of conjugative contacts between cells and is likely to slightly inhibit the processes of recombination.

[Virus-induced dyslipidemias as possible risk factors in the development of somatic diseases]. / Virusindutsirovannye dislipidemii kak vozmozhnye faktory riska v razvitii somaticheskikh zabolevanii.

Experimental and clinical studies showed a number of virus infections to be accompanied by lipidemic disorders. Experimentally, dyslipidemias were found in tick-borne encephalitis (TBE) in mice, rotavirus infection in rabbits, and amyotrophic leukospongiosis in guinea pigs. The possibility of correcting the virus-induced lipidemic disorders with an antiviral drug, lincomycin, was demonstrated in TBE in mice. Dynamic study of the lipidemic status of patients with virus hepatitis A revealed marked dyslipidemia of the atherogenic type which was stable and persisted up to the time of clinical recovery. The data obtained supplement the current concepts concerning the pathogenesis of virus infections.

[Dyslipidemia in herpetic infection]. / Dislipidemiia pri gerpeticheskoi infektsii.

Herpes ophthalmicus (HO) patients were examined for lipid spectrum of the serum. The tests revealed dyslipidemia (DLE) with a distinctive rise in the levels of total cholesterol (CS), alpha-CS and beta-CS. The severity of the lipidemic shifts correlated with that of the infection. DLE was more marked in recurrent HO. Clinical evidence was consistent with experimental findings. In rabbit models, herpetic keratoconjunctivitis was characterized by pronounced lipidemic alterations correctable with antiherpetic drug furavir. The results are discussed in terms of herpetic infection pathogenesis and its role in the development of atherosclerosis.

[Lipid metabolism in experimental virus infections]. / Lipidnyi obmen pri virusnykh infektsiiakh v éksperimente.

The effect of herpes simplex virus (HSV) and influenza virus (IV) on lipid metabolism was studied. In conditions of acute herpetic infection of rabbits we detected typical dyslipidemia, characterized by increased contents of total cholesterol, beta-cholesterol and triglycerides in the absence of trustworthy differences in concentrations of alpha-cholesterol. The use of antiherpetic preparation furavir, on the background of infection, corrected lipid spectrum of the infected animals. Blood lipid disturbances in acute influenza virus infection of mice were not detected. HSV infection of cell culture of human aorta was accompanied by increased accumulation of free lipids in cells. IV infection, in the same conditions of experiment, did not change the contents of intracellular lipids. The obtained data deepen the existing notions of herpetic and influenza infections pathogenesis and may be useful in understanding etiopathogenesis of certain somatic metabolism diseases.

[Dyslipidemia and an elevated lipid level in the cells in experimental herpetic infection and their correction with antiviral chemotherapeutic agents]. / Dislipidemiia, povyshennoe soderzhanie v kletkakh lipidov pri éksperimental'noi gerpeticheskoi infektsii i ikh korrektsiia antivirusnymi khimiopreparatami.

The influence of herpes simplex virus on lipid exchange and accumulation by blood vessels cells was studied. In acute herpes infection in rabbits, typical dyslipidemia characterised by a rise in the content of total cholesterol, low and very low density lipoprotein cholesterol and triglycerides in the absence of manifest changes in concentration of high density lipoprotein was detected. HSV infection of smooth muscle cell culture of human embryo aorta was accompanied by increased accumulation of free lipids in the cells. The use of antiherpetic preparations during the infection led to correction of the lipid spectrum of the infected animals and was accompanied by normalization of intracellular lipid contents. A possible pathogenetic role of HSV in atherogenesis which may be connected with at least two processes: the development of lipidemic disturbances and formation of pathologic lipid depot in the arterial wall, is discussed.