3 Key Takeaways
Plain English Summary- 01Core Finding
Here, we identify Otubain-2 (OTUB2) as a pivotal regulator that orchestrates the STING signalosome to amplify inflammatory responses.
- 02Study Evidence
Tested in a in vivo animal model (preclinical discovery) at the preclinical stage.
- 03Practical Meaning
Early laboratory or animal model findings — human trials are still needed to confirm safety and benefit.
What This Means for You
Additionally, OTUB2 functioned as a scaffold facilitating assembly of the TBK1-interferon (an immune-signaling protein) regulatory factor 3 (IRF3) signalling complex, a prerequisite for IRF3 phosphorylation, and enhanced IRF3 dimerization by reducing its K11 ubiquitination. Genetic deletion or pharmacological inhibition of OTUB2 significantly ameliorated neuroinflammation and neurodegeneration in both ALS and aged mouse models.
This study establishes OTUB2 as a critical regulator of cGAS-STING signalling and a potential therapeutic target for neuroinflammation and neurodegeneration.
The Discovery
The cyclic GMP-AMP synthase (cGAS)-stimulator of interferon (an immune-signaling protein) genes (STING) pathway-mediated chronic inflammation drives neurodegeneration in natural aging and various neurodegenerative diseases, including amyotrophic lateral sclerosis (ALS). Here, we identify Otubain-2 (OTUB2) as a pivotal regulator that orchestrates the STING signalosome to amplify inflammatory responses. The function of OTUB2 in neuroinflammation and neurodegeneration was investigated through genetic deletion and pharmacological inhibition of OTUB2 in hTARDBP transgenic mice, adeno-associated virus-mediated TDP43 overexpression mice, and aged mice. Biochemical assays were performed to dissect underlying molecular mechanisms. OTUB2 inhibited K63 ubiquitination of TANK-binding kinase 1 (TBK1), thereby suppressing TBK1 kinase activity and promoting cell death mediated by hyperactivated receptor-interacting serine/threonine-protein kinase 1 (RIPK1).
How It Works, Simply
This neurology research focuses on inflammation · Receptor targeting · Genetics. Researchers evaluated it using an in vivo animal model (Preclinical discovery) at the preclinical stage of medical research.
3 Key Takeaways
Clinical Takeaways- 01Core Finding
Here, we identify Otubain-2 (OTUB2) as a pivotal regulator that orchestrates the STING signalosome to amplify inflammatory responses.
- 02Study Evidence
Tested in a in vivo animal model (preclinical discovery) at the preclinical stage.
- 03Practical Meaning
Early laboratory or animal model findings — human trials are still needed to confirm safety and benefit.
Biological Mechanism & Study Design
Study Design & Cohort
Animal models
In vivo animal model (Preclinical discovery) · Preclinical
Biological Pathway & Modality
Inflammation · Receptor targeting · Genetics
Intervention: The TBK1-OTUB2-IRF3 signalling complex promotes neuroinflammation and
Experimental Findings & Endpoints
The cyclic GMP-AMP synthase (cGAS)-stimulator of interferon genes (STING) pathway-mediated chronic inflammation drives neurodegeneration in natural aging and various neurodegenerative diseases, including amyotrophic lateral sclerosis (ALS).
Here, we identify Otubain-2 (OTUB2) as a pivotal regulator that orchestrates the STING signalosome to amplify inflammatory responses. The function of OTUB2 in neuroinflammation and neurodegeneration was investigated through genetic deletion and pharmacological inhibition of OTUB2 in hTARDBP transgenic mice, adeno-associated virus-mediated TDP43 overexpression mice, and aged mice.
Biochemical assays were performed to dissect underlying molecular mechanisms. OTUB2 inhibited K63 ubiquitination of TANK-binding kinase 1 (TBK1), thereby suppressing TBK1 kinase activity and promoting cell death mediated by hyperactivated receptor-interacting serine/threonine-protein kinase 1 (RIPK1).
Clinical Translation & Practice Context
Additionally, OTUB2 functioned as a scaffold facilitating assembly of the TBK1-interferon regulatory factor 3 (IRF3) signalling complex, a prerequisite for IRF3 phosphorylation, and enhanced IRF3 dimerization by reducing its K11 ubiquitination.
Genetic deletion or pharmacological inhibition of OTUB2 significantly ameliorated neuroinflammation and neurodegeneration in both ALS and aged mouse models.
This study establishes OTUB2 as a critical regulator of cGAS-STING signalling and a potential therapeutic target for neuroinflammation and neurodegeneration.
The Bottom Line · Clinical Pearl
“This study establishes OTUB2 as a critical regulator of cGAS-STING signalling and a potential therapeutic target for neuroinflammation and neurodegeneration.”
Published in Brain: A Journal of Neurology · Current Stage: Preclinical
