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NLR2 and TLR3, TLR4, TLR5 Ligands, Injected In Vivo, Improve after 1 h the Efficiency of Cloning and Proliferative Activity of Bone Marrow Multipotent Stromal Cells and Reduce the Content of Osteogenic Multipotent Stromal Cells in CBA Mice

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Ligands NLR2 (muramyldipeptide) and TLR (bacterial LPS, flagellin, CpG-dinucleotide, and Poly I:C) and S. typhimurium antigenic complex by 1.5-3-fold increase the efficiency of cloning and content of multipotent stromal cells (MSC) in the bone marrow of CBA mice as soon as 1 h postinjection. The counts of large colonies (150-500 cells) increased by 2.5-3.3 times in comparison with intact bone marrow cultures at the expense of a decrease in the number of smaller colonies, which attests to enhanced proliferation of stromal cells in the colonies. The efficiency of cloning and hence, MSC content in the femoral bone decreased by 1.2-1.9 times after 3 h and increased again after 24 h to the level 1.3-1.5 times higher than the level 1 h postinjection (LPS, Poly I:C, and S. typhimurium antigenic complex). The dynamics of bone marrow MSC cloning efficiency after 1-3 h corresponded to the dynamics of serum cytokine concentrations during the same period. However, the levels of serum cytokines after 24 h in general were similar to those in intact mice or were lower. The concentrations of osteogenic multipotent stromal cells in the bone marrow decreased 2-3-fold after 3 h and thus persisted by 24 h postinjection. Twofold (at 24-h interval) and a single injection of S. typhimurium antigenic complex to mice led to a significant increase of cloning efficiency, observed as early as just 1 h postinjection (1.9 and 1.5 times, respectively). The same picture was observed for serum cytokines. On the whole, injections of TLR and NLR ligands and of S. typhimurium antigenic complex led to stromal tissue activation within 1 h postinjection, this activation consisting in a significant increase of the efficiency of cloning and of MSC count in the bone marrow, and also in an increase in their proliferative activity and a decrease (after 3 h) of osteogenic MSC concentration.

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Authors and Affiliations

  1. Laboratory of Immunity Regulation and Immunological Tolerance, Moscow, Russia

    Yu. F. Gorskaya & V. G. Nesterenko

  2. Laboratory of Cellular Microbiology, N. F. Gamaleya Federal Research Centre of Epidemiology and Microbiology, the Ministry of Health of the Russian Federation, Moscow, Russia

    A. I. Tukhvatulin

Authors
  1. Yu. F. Gorskaya
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  2. A. I. Tukhvatulin
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  3. V. G. Nesterenko
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Correspondence to Yu. F. Gorskaya.

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Translated from Byulleten’ Eksperimental’noi Biologii i Meditsiny, Vol. 163, No. 3, pp. 339-344, March, 2017

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Gorskaya, Y.F., Tukhvatulin, A.I. & Nesterenko, V.G. NLR2 and TLR3, TLR4, TLR5 Ligands, Injected In Vivo, Improve after 1 h the Efficiency of Cloning and Proliferative Activity of Bone Marrow Multipotent Stromal Cells and Reduce the Content of Osteogenic Multipotent Stromal Cells in CBA Mice. Bull Exp Biol Med 163, 356–360 (2017). https://doi.org/10.1007/s10517-017-3803-1

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  • DOI: https://doi.org/10.1007/s10517-017-3803-1

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