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Human CLEC16A regulates autophagy through modulating mTOR activity.

Rachel Chun Yee Tam1, Michelle Wing Man Li1, Yan Pan Gao2

  • 1Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR.

Experimental Cell Research
|February 23, 2017
PubMed
Summary
This summary is machine-generated.

The protein CLEC16A inhibits autophagy, a cellular process implicated in autoimmune diseases. It does this by activating the mTOR pathway, suggesting a new target for treating autoimmune conditions.

Keywords:
AutophagyCLEC16AConfocal microscopyQuantitative proteomicsmTOR signaling

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Area of Science:

  • Cell Biology
  • Immunology
  • Molecular Biology

Background:

  • The protein CLEC16A is genetically associated with autoimmune disorders, but its precise function in these conditions is unclear.
  • Autophagy, a cellular degradation process, is increasingly recognized for its role in the development of autoimmune diseases.

Purpose of the Study:

  • To investigate the functional role of CLEC16A in autophagy and its potential connection to autoimmune disease pathogenesis.
  • To elucidate the molecular mechanism by which CLEC16A influences autophagy.

Main Methods:

  • Ectopic expression and siRNA silencing of CLEC16A in human cells.
  • Quantitative proteomics and immunoblotting analyses.
  • Cellular localization studies using microscopy.

Main Results:

  • CLEC16A was found to inhibit starvation-induced autophagy in human cells.
  • CLEC16A appears to regulate autophagy by activating the mTOR pathway.
  • Overexpression of CLEC16A enhanced mTOR activity and reduced autophagy, while CLEC16A deficiency augmented the autophagic response.
  • CLEC16A localizes to cytosolic vesicles and the Golgi apparatus, potentially positioning it to modulate mTOR signaling.

Conclusions:

  • CLEC16A negatively regulates autophagy through the mTOR pathway, particularly at the Golgi apparatus.
  • These findings suggest a functional link between CLEC16A, autophagy modulation, and the development of autoimmune diseases.