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Leptin affects filopodia and cofilin in NK-92 cells in a dose- and time-dependent manner

Jana Oswald, Maximilian Büttner, Simon Jasinsky-Bergner, Roland Jacobs, Philip Rosenstock, Heike Kielstein
  • Jana Oswald
    Martin Luther University Halle-Wittenberg, Department of Anatomy and Cell Biology, Germany
  • Maximilian Büttner
    Martin Luther University Halle-Wittenberg, Department of Anatomy and Cell Biology, Germany
  • Simon Jasinsky-Bergner
    Martin Luther University Halle-Wittenberg, Department of Anatomy and Cell Biology, Germany
  • Roland Jacobs
    Hannover Medical School, Clinic for Clinical Immunology and Rheumatology, Germany
  • Philip Rosenstock
    Martin Luther University Halle-Wittenberg, Institute for Physiological Chemistry, Germany

Abstract

Hyperleptinemia, associated with obesity, is related with immune dysfunction and carcinogenesis. Natural Killer (NK) cells, a major component of the innate immune system are mediators of anti-tumor immunity and the most actively migrating cells among leukocytes. Actin rearrangement, promoted by cofilin plays a central role in cellular migration. Leptin affects the phosphorylation-dependent activity of cofilin and thus actin remodeling. We used human NK-92 cells to explore the in vitro effects of leptin on co-localization of cofilin and F-actin and on morphological changes in NK cells. NK-92 cells were incubated with different leptin concentrations (10 and 100 ng/mL) for 30 min and 24 h and immunocytochemically stained. Results demonstrate a dose- and time-dependent influence of leptin on cellular morphology. Utilizing confocal microscopy, we observed that the co-localization of cofilin-1 and F-actin was slightly influenced by leptin. In summary, the present study demonstrates an impact of a physiological leptin stimulation on the filopodia length, and a time-dependent effect on the co-localization of cofilin and F-actin in NK-92 cells. 

Keywords

Actin; leptin; adipokine; NK cells; cell movement; migration; obesity; immunity.

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Submitted: 2017-09-07 14:07:27
Published: 2018-01-26 11:00:15
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Copyright (c) 2018 Jana Oswald, Maximilian Büttner, Simon Jasinsky-Bergner, Roland Jacobs, Philip Rosenstock, Heike Kielstein

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