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Molecular and Cellular Biochemistry

, Volume 384, Issue 1–2, pp 213–219 | Cite as

MicroRNA-124 reduces caveolar density by targeting caveolin-1 in porcine kidney epithelial PK15 cells

  • Songbai Yang
  • Xiangdong Liu
  • Xinyun Li
  • Shufeng Sun
  • Fei Sun
  • Bin FanEmail author
  • Shuhong ZhaoEmail author
Article

Abstract

Caveolin-1 is the principal component of caveolae, and it is implicated in endocytosis, cholesterol homeostasis, signal transduction and tumorigenesis. MicroRNAs play key regulatory roles in many cellular processes. However, the molecular mechanism by which porcine caveolin-1 is regulated by microRNAs remains unclear. In the present study, we found that miR-124 could directly target caveolin-1 in porcine kidney epithelial cells (PK15). A luciferase reporter assay revealed that miR-124 directly bound to Cav1 mRNA. Ectopic expression of miR-124 decreased porcine Cav1 expression at both the mRNA and protein levels. Furthermore, we used transmission electron microscopy to count caveolae in the cytosolic space next to the membrane and we found that the overexpression of miR-124 in PK15 cells reduced the density of the caveolae. Our results suggested that miR-124 reduced caveolar density by targeting caveolin-1 in PK15 cells; therefore, miR-124 could play an important role in the caveolae-mediated endocytosis of pathogens and signal transduction.

Keywords

miR-124 Caveolin-1 Caveolar density PK15 cells 

Notes

Acknowledgments

This work was supported by the NSFC (31025026, 31101693, 31072009) and the Fundamental Research Funds for the Central Universities (2010PY008).

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  1. 1.Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education & College of Animal Science and TechnologyHuazhong Agricultural UniversityWuhanChina
  2. 2.Center for Bio-imaging, Institute of BiophysicsChinese Academy of SciencesBeijingChina
  3. 3.National Laboratory of Biomacromolecules, Institute of BiophysicsChinese Academy of SciencesBeijingChina

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