Chemosignaling is widespread among animals as tool for regulation of synecological interactions. Evolutional conservatism of such signaling allows us to suggest that same chemosignals play an important role in different animal species including human beings. Aversion/attraction of mouse pheromone 2,5- dimethylpyrazine (2,5-DMP) and 2,3-dimethylpyrazine (2,3-DMP) for CBA and C57BL/6 mice was studied in T-maze. It is shown that intact males and females of both strains under choice condition prefer 2,3-DMP to water and 2,5-DMP. They also prefer water to 2,5-DMP Stress after swimming modifies behavior in T-maze: all preferences disappear in C57BL/6 males and remain without changes in CBA males. Importance of behavioral changes obtained here under stress condition is discussed. Detailed studies of the preference modulation with recently shown other effects of 2,5-DMP could connect specific sensitivity to chemosignals with the pheromone, stress and genotype.
Quantity of antibody producing cells and changes in bone marrow dividing cells of mouse males were studied after the exposure with chemosignals from intact or stressed donor mouse males. Inbred CBA, BALB/c and C57BL/6 strains were used. It is shown that excreted volatiles decrease quantity of antibody producing cells in spleen and at the same time raise the level of mitotic disturbances in bone marrow cells of recipient mice. Pheromone effect depends on genotype and physiological state of the recipients. For the first time we describe here the influence of mouse female pheromone 2,5-dimethylpyrazine on analyzed features. Biological meaning of the discovered effects is discussed.
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