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I I Poletaeva

Publications and source records attributed to I I Poletaeva.

At least 37 records · Page 2Linked to original sources
PubMed1995

[Behavior of adult mice of various strains after exposure of thiophosphamide during organogenesis].

Females of strains 101/HY and CBA were treated with a single dose of thio-TEPA (0, 0.625, or 1.25 mg/kg body weight) on day 12 of gestation (deposition of a vaginal plug was considered as the first day of gestation). Special experiments were performed on their offspring at 3 months of age to study exploratory-research activity (burrow reactions, upright postures), locomotor activity in a "open field" cage, emotional reactivity, and level of feeding motivation. Changes in behavior after exposure to thio-TEPA were observed in mice of both sexes and genotypes; however, in 101/HY mice, which are characterized by genetically determined genome instability and a defect in DNA repair system, such changes were more pronounced. In general, they may be defined as a decrease in intensity of exploratory-research activity with some modulation of the level of motor activity. Sex differences in behavior of animals of both strains after prenatal exposure to thio-TEPA were also found. The data provide evidence about the specific role of genetic factors in variation of mouse behavior after prenatal exposure to thiophosphamide and allow consideration of thio-TEPA as a behavioral teratogen.

Animals↗
PubMed1994

Swimming navigation, open-field activity, and extrapolation behavior of two inbred mouse strains with Robertsonian translocation of chromosomes 8 and 17.

Female mice from inbred strains carrying a Robertsonian translocation (nine CBARb and eight C57BL/6Rb) were compared with animals from their respective strains (seven CBA and nine C57BL/6) first in open-field activity (two exposures of 10-min duration), then during 5 days (with six trials each) in Morris' swimming navigation test, and finally, in their ability to extrapolate the future position of a food reward being moved slowly out of their reach. ANOVA (strain and translocation) revealed significant effects of Robertsonian translocations (Rb) in swimming navigation, Rb mice being impaired primarily in the initial phases of acquisition and during the first trials of platform reversal and the impairment being stronger in C57BL/6 mice. In the open field, Rb mice were as active as the normal strains but showed significantly increased path tortuosity and moved slightly faster. In the extrapolation task, Rb mice showed above-chance levels in moving to the target indicated by the disappearance of the stimulus, while normal mice chose at chance levels, but the translocation effects were not statistically significant. These data indicate that telocentric fusion of chromosomes may entail behavioral alterations, perhaps by subtle changes in neurotransmitters or limbic circuitry. The expression of such alterations, however, can be remarkably strain dependent.

Animals↗
PubMed1993

Genetic aspects of animal reasoning.

This paper reviews the investigations of Prof. L. V. Krushinsky and his colleagues into the genetics of complex behaviors in mammals. The ability of animals to extrapolate the direction of a food stimulus movement was investigated in wild and domesticated foxes (including different fur-color mutants), wild brown rats, and laboratory rats and mice. Wild animals (raised in the laboratory) were shown to be superior to their respective domesticated forms on performance of the extrapolation task, especially in their scores for the first presentation, in which no previous experience could be used. Laboratory rats and mice demonstrated a low level of extrapolation performance. This means that only a few laboratory animals were capable of solving the task, i.e., the percentage of correct solutions was equivalent to chance. The brain weight selection program resulted in two mice strains with a 20% (90-mg) difference in brain weight. Ability to solve the extrapolation task was present in low-brain weight mice in generations 7-11 but declined with further selection. Investigation of extrapolation ability in mice with different chromosomal anomalies demonstrated that animals with Robertsonian translocations Rb(8,17) 1lem and Rb(8,17) 6Sic were capable of solving this task in a statistically significant majority of cases, while mice with fusion of other chromosomes, as well as CBA normal karyotype mice, performed no better than expected by chance. Mice with two types of partial trisomies and animals homo- and heterozygous for translocations were also tested.(ABSTRACT TRUNCATED AT 250 WORDS)

Animals↗
PubMed1992

[An unusual type of locomotion in mice of line 101/Hy].

An unusual type of locomotion--backward movements--was revealed in the 101/HY mouse strain characterized by a chromosomal instability and the defect in DNA repair. The backward movements were found in 60% of mice belonging to the population under study. The manifestation of the character was found to vary: it was high in 16% of the animals. No age and sex differences were found. The backward movements in the 101/HY mouse strain were somewhat similar to the peculiarity in locomotion of the neurological hot-foot mouse mutants. The latter had mild anatomical alterations in the cerebellum. No obvious brain pathology was revealed in the 101/HY mice.

Animals↗
PubMed1986

[Behavior of mice with robertsonian translocations of chromosomes].

The behaviour of mice with normal karyotype and those with robertsonian translocations was studied. The ability of the animals to solve an extrapolatory task was analysed. The experimental procedure was initiated with presentation of a food bait which the animal could reach only through a small opening in a screen. As the mouse started drinking, the food cup was moved leftward or rightward disappearing from the animal's view. The problem was to move in the direction of food, in which case the mouse could find it behind one of two feeding holes, to the right or to the left of the starting point. Laboratory mice were not able to solve this problem, whereas mice containing Rb(8, 17)1 IEM in karyotype demonstrated the extrapolatory ability - they solve the task correctly in a significant majority of cases. By means of a series of backcrosses of Rb(8, 17)1 IEM carriers on CBA strain (these mice have no extrapolatory ability) and subsequent inbreeding, a novel inbred strain was obtained, coisogenic to CBA and possessing the robertsonian translocation Rb(8, 17)1 IEM. These mice with the CBA genetic background solve the extrapolatory problem successfully, the level of correct choices being significantly above the 50% chance level. At the same time, their performance was lower than that of outbred mice with Rb(8, 17)1 IEM, the phenomenon possibly being the result of the influence of CBA genetic background. Mice with Rb(8, 17)6 Sic were also shown to possess the extrapolatory ability.(ABSTRACT TRUNCATED AT 250 WORDS)

Animals↗
PubMedDate not supplied

[Interstrain differences in the the behavior of mice selected for greater and lesser brain mass].

The capability for extrapolation of movement direction of stimuli and learning ability in T-maze were studied in F15-F18 mice generations, selected for large (LB) and small (SB) brain weight. There were no significant or stable differences between strains in capacity for extrapolation. Learning ability was higher in mice of the LB strain. In these mice, the behavioral asymmetry (the tendency to move to the right) was observed during performance of both extrapolation and T-maze tasks. Since such an asymmetry was absent in mice of initial heterogeneous population, we think that the observed phenomenon may be a concomitant result of brain weight selection. The described strains present a model for studying the functional relationships between brain weight and behavior.

Animals↗
PubMedDate not supplied

[Interstrain differences in the maturation of congenital reflexes in 101/HY and CBA mice in early postnatal ontogeny].

We have identified interstrain differences in the rate of formation of certain reflexes and parameters of physical development in CBA/LacSto and 101/HY mice. We have shown that in young 101/HY mice, the maturation of reflexes reflecting the development of the vestibular, neurosensory, and neuromuscular systems, such as surface righting, bar holding, negative geotaxis, and auditory startle response, takes place later during postnatal life. Opening of eyes and auditory canals in mice of all studied groups takes place at the same time. In CBA females, maturation of cliff avoidance reflex occurs later than in 101/HY females; hair also appeared later. Body weight of young 101/HY mice of both sexes is significantly higher during the period of postnatal development from day 2 to day 20 than in the CBA strain. However, the relative brain weight was lower in the 101/HY strain. CBA males had a higher brain weight and also showed a faster rate of formation of inborn reflexes. We discuss possible factors underlying the observed difficulties in the rate of formation of reflexes in 101/HY and CBA young mice in relation to general background information about their genetic and neurobehavioral features. The results provide evidence that these differences are genetically determined; the rate of reflex formation does not depend on the overall physical development of mice and is rather due to a delay and/or abnormalities in nervous system development.

Aging↗