title: [Effects of relic microorganism B. sp. on development, gaseous exchange, spontaneous motor activity, stress resistance and survival of Drosophila melanogaster].
abstract: The effect of relic microorganism B. sp., living in severe environment of Siberian permafrost during thousands and millions of years, on development and stress resistance of Drosophila melanogaster has been studied. In manipulating with such objects with practically "eternal life span", molecular carriers of the unprecedented longevity potential and possibilities of their transmission to other biological objects should primarily be addressed. Here we discuss for the first time the influence of B. sp. application on development, survival, stress resistance and the gross physiological predictors of aging rate in D. melanogaster. To establish optimal and toxic doses, wide range of B. sp. concentrations were tested (1-500 million cells of B. sp. per 1 ml of the flies feeding medium). Surprisingly, no toxic effects of B. sp. could be registered even on such a "sensitive" model as the developing larvae. In fact, the rate of development, survival and body mass gradually increased with elevation of B. sp. concentration. The gain of higher body mass within shorter periods of development could indicate enhanced anabolic and/ or declined catabolic effects of B. sp. Higher motor activity and gaseous exchange rates were observed in imagoes developed on the mediums with B. sp. application. Survival of these flies at the heat shock (30 min at 38 degrees C) and ultraviolet irradiation (60 min, 50W UV lamp) was increased, indicating elevated stress resistance, apparently due to stimulation of DNA-repair and chaperone-mediated protection of macromolecules. Further research is clearly warranted to identify more efficient anti-stress and antiaging preparations and schemes of B. sp. application on models of laboratory mammals and human cell cultures.
authors.forename: A V
authors.initials: AV
authors.lastname: Brushkov
authors.forename: V V
authors.initials: VV
authors.lastname: Bezrukov
authors.forename: G I
authors.initials: GI
authors.lastname: Griva
authors.forename: Kh K
authors.initials: KhK
authors.lastname: Muradian
mesh_terms: D000818:Animals; D001419:Bacteria / Q000302:isolation & purification*; D018407:Bacterial Physiological Phenomena; D002245:Carbon Dioxide / Q000502:physiology; D004331:Drosophila melanogaster / Q000254:growth & development / Q000382:microbiology* / Q000502:physiology*; D005260:Female; D008136:Longevity; D008297:Male; D009043:Motor Activity; D010101:Oxygen Consumption; D013312:Stress, Physiological
chemical_list: D002245:Carbon Dioxide