Abstract
Mutations in the NGLY1 (N-glycanase 1) gene, encoding an evolutionarily conserved deglycosylation enzyme, are associated with a rare congenital disorder leading to global developmental delay and neurological abnormalities. The molecular mechanism of the NGLY1 disease and its function in tissue and immune homeostasis remain unknown. Here, we find that NGLY1-deficient human and mouse cells chronically activate cytosolic nucleic acid-sensing pathways, leading to elevated interferon gene signature. We also find that cellular clearance of damaged mitochondria by mitophagy is impaired in the absence of NGLY1, resulting in severely fragmented mitochondria and activation of cGAS-STING as well as MDA5-MAVS pathways. Furthermore, we show that NGLY1 regulates mitochondrial homeostasis through transcriptional factor NRF1. Remarkably, pharmacological activation of a homologous but nonglycosylated transcriptional factor NRF2 restores mitochondrial homeostasis and suppresses immune gene activation in NGLY1-deficient cells. Together, our findings reveal novel functions of the NGLY1-NRF1 pathway in mitochondrial homeostasis and inflammation and uncover an unexpected therapeutic strategy using pharmacological activators of NRF2 for treating mitochondrial and immune dysregulation.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 2600-2616 |
| Number of pages | 17 |
| Journal | The Journal of experimental medicine |
| Volume | 215 |
| Issue number | 10 |
| DOIs | |
| State | Published - Oct 1 2018 |
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ASJC Scopus subject areas
- Immunology and Allergy
- Immunology
Cite this
N-glycanase NGLY1 regulates mitochondrial homeostasis and inflammation through NRF1. / Yang, Kun; Huang, Ryan; Fujihira, Haruhiko; Suzuki, Tadashi; Yan, Nan.
In: The Journal of experimental medicine, Vol. 215, No. 10, 01.10.2018, p. 2600-2616.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - N-glycanase NGLY1 regulates mitochondrial homeostasis and inflammation through NRF1
AU - Yang, Kun
AU - Huang, Ryan
AU - Fujihira, Haruhiko
AU - Suzuki, Tadashi
AU - Yan, Nan
PY - 2018/10/1
Y1 - 2018/10/1
N2 - Mutations in the NGLY1 (N-glycanase 1) gene, encoding an evolutionarily conserved deglycosylation enzyme, are associated with a rare congenital disorder leading to global developmental delay and neurological abnormalities. The molecular mechanism of the NGLY1 disease and its function in tissue and immune homeostasis remain unknown. Here, we find that NGLY1-deficient human and mouse cells chronically activate cytosolic nucleic acid-sensing pathways, leading to elevated interferon gene signature. We also find that cellular clearance of damaged mitochondria by mitophagy is impaired in the absence of NGLY1, resulting in severely fragmented mitochondria and activation of cGAS-STING as well as MDA5-MAVS pathways. Furthermore, we show that NGLY1 regulates mitochondrial homeostasis through transcriptional factor NRF1. Remarkably, pharmacological activation of a homologous but nonglycosylated transcriptional factor NRF2 restores mitochondrial homeostasis and suppresses immune gene activation in NGLY1-deficient cells. Together, our findings reveal novel functions of the NGLY1-NRF1 pathway in mitochondrial homeostasis and inflammation and uncover an unexpected therapeutic strategy using pharmacological activators of NRF2 for treating mitochondrial and immune dysregulation.
AB - Mutations in the NGLY1 (N-glycanase 1) gene, encoding an evolutionarily conserved deglycosylation enzyme, are associated with a rare congenital disorder leading to global developmental delay and neurological abnormalities. The molecular mechanism of the NGLY1 disease and its function in tissue and immune homeostasis remain unknown. Here, we find that NGLY1-deficient human and mouse cells chronically activate cytosolic nucleic acid-sensing pathways, leading to elevated interferon gene signature. We also find that cellular clearance of damaged mitochondria by mitophagy is impaired in the absence of NGLY1, resulting in severely fragmented mitochondria and activation of cGAS-STING as well as MDA5-MAVS pathways. Furthermore, we show that NGLY1 regulates mitochondrial homeostasis through transcriptional factor NRF1. Remarkably, pharmacological activation of a homologous but nonglycosylated transcriptional factor NRF2 restores mitochondrial homeostasis and suppresses immune gene activation in NGLY1-deficient cells. Together, our findings reveal novel functions of the NGLY1-NRF1 pathway in mitochondrial homeostasis and inflammation and uncover an unexpected therapeutic strategy using pharmacological activators of NRF2 for treating mitochondrial and immune dysregulation.
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U2 - 10.1084/jem.20180783
DO - 10.1084/jem.20180783
M3 - Article
VL - 215
SP - 2600
EP - 2616
JO - Journal of Experimental Medicine
JF - Journal of Experimental Medicine
SN - 0022-1007
IS - 10
ER -