Self-eating to remove cilia roadblock

Zaiming Tang, Muyuan Zhu, Qing Zhong

Research output: Contribution to journalShort survey

11 Scopus citations

Abstract

Autophagy delivers many proteins and cellular components to the lysosome for degradation via selective or nonselective mechanisms. By controlling the stability of defined protein factors, autophagy might regulate cellular processes in a precise and finely-tuned manner. In this study, we demonstrated that autophagy positively regulates the biogenesis of the primary cilium, an antenna-like organelle that senses the environment and transduces signals. Defects in the function or structure of cilia cause a number of human diseases called "ciliopathies." We found that the autophagosome membrane anchored protein LC3 interacts with OFD1 (oral-facial-digital syndrome 1) and removes it from the centriolar satellite upon serum starvation to initiate primary cilium biogenesis. OFD1 regulation and primary cilium formation are defective in autophagy-deficient cells, and reducing OFD1 protein levels through RNA interference rescues primary cilium formation. More strikingly, knockdown of OFD1 induces primary cilium formation in unstressed cells as well as in a human breast cancer cell that was previously reported to have lost the ability to form primary cilia. These findings therefore suggest an unexpected link among autophagy, ciliogenesis, ciliopathy, and cancers.

Original languageEnglish (US)
Pages (from-to)379-381
Number of pages3
JournalAutophagy
Volume10
Issue number2
DOIs
StatePublished - Feb 2014

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Keywords

  • Autophagy
  • Centriolar satellites
  • OFD1
  • PCM1
  • Primary ciliogenesis

ASJC Scopus subject areas

  • Molecular Biology
  • Cell Biology

Cite this

Tang, Z., Zhu, M., & Zhong, Q. (2014). Self-eating to remove cilia roadblock. Autophagy, 10(2), 379-381. https://doi.org/10.4161/auto.27346