Biochemistry (Moscow)

, Volume 84, Issue 6, pp 663–671 | Cite as

The Opposite Effects of ROCK and Src Kinase Inhibitors on Susceptibility of Eukaryotic Cells to Invasion by Bacteria Serratia grimesii

  • E. S. Bozhokina
  • O. A. Tsaplina
  • S. Yu. KhaitlinaEmail author


Bacterial internalization into eukaryotic cells is ensured by a sophisticated interplay of bacterial and host cell factors. Being a part of cell environment, opportunistic intracellular bacteria have developed various mechanisms providing their interaction with cell surface receptors (E-cadherin, integrins, epidermal growth factor receptor), activation of components of eukaryotic signaling pathways, and facilitation of bacterial uptake, survival, and intracellular replication. Our previous studies on the mechanisms underlying penetration of the opportunistic bacteria Serratia grimesii into cultured eukaryotic cells have shown that pretreatment of the cells with N-acetylcysteine (NAC) promotes S. grimesii invasion, and this effect correlates with the upregulation of E-cadherin expression. Since NAC has been shown to regulate expression of both Src kinase and ROCK, the aim of this work was to reveal the role of these kinases in S. grimesii invasion. We demonstrated that Y-27632, a specific inhibitor of ROCK, significantly promoted invasion of cultured eukaryotic cells by S. grimesii. On the other hand, invasion of the same cells by S. grimesii was inhibited with the Src kinase inhibitor Src-I1 and siRNA directed against RhoA. The effects of the inhibitors correlated with the corresponding changes in the E-cadherin gene expression, upregulation by the ROCK inhibition and downregulation by the Src kinase inhibition. These results prove the participation of ROCK and Src protein kinases in the invasion of eukaryotic cells by the opportunistic pathogen S. grimesii, as well as suggest that other signaling pathways might be involved in S. grimesii uptake, that are promoted by the ROCK inhibition with Y-27632.


bacterial invasion RhoA ROCK kinase Src kinase Serratia grimesii 





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Copyright information

© Pleiades Publishing, Ltd. 2019

Authors and Affiliations

  • E. S. Bozhokina
    • 1
  • O. A. Tsaplina
    • 1
  • S. Yu. Khaitlina
    • 1
    Email author
  1. 1.Institute of CytologyRussian Academy of SciencesSt. PetersburgRussia

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