Cited by 26Amyotrophic Lateral Sclerosis ResearchMitochondrial Function and PathologyAlzheimer's disease research and treatments

Genome-wide synthetic lethal CRISPR screen identifies FIS1 as a genetic interactor of ALS-linked C9ORF72

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Chai, Noori, Haney, Michael S., Couthouis, Julien, Morgens, David W., Benjamin, Alyssa, Wu, Kathryn, Ousey, James, Fang, Shirleen +3 more·2020·Brain Research

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Abstract

Mutations in the C9ORF72 gene are the most common cause of amyotrophic lateral sclerosis (ALS). Both toxic gain of function and loss of function pathogenic mechanisms have been proposed. Accruing evidence from mouse knockout studies point to a role for C9ORF72 as a regulator of immune function. To provide further insight into its cellular function, we performed a genome-wide synthetic lethal CRISPR screen in human myeloid cells lacking C9ORF72. We discovered a strong synthetic lethal genetic interaction between C9ORF72 and FIS1, which encodes a mitochondrial membrane protein involved in mitochondrial fission and mitophagy. Mass spectrometry experiments revealed that in C9ORF72 knockout cells, FIS1 strongly bound to a class of immune regulators that activate the receptor for advanced glycation end (RAGE) products and trigger inflammatory cascades. These findings present a novel genetic interactor for C9ORF72 and suggest a compensatory role for FIS1 in suppressing inflammatory signaling in the absence of C9ORF72.

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  • iPSC-derived cells from different lineages can be combined into defined three-dimensional cultures called assembloids.

    “Furthermore, iPSC-derived cell types from different lineages can be combined into defined three-dimensional cultures, termed assembloids9,94–98.”

    From CRISPR-based functional genomics for neurological disease (2020) · cites this paper as [94]

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Authors
Chai, N., Haney, M. S., Couthouis, J., Morgens, D. W., Benjamin, A., Wu, K., Ousey, J., Fang, S., Finer, S., Bassik, M. C., & Gitler, A. D.
Affiliations
Stanford Medicine (US)
Corresponding author
Gitler, Aaron D.
Venue
Brain Research
Publisher
Elsevier BV
Published
2020-02
Volume
1728
Pages
146601
ISSN
0006-8993 (ISSN-L)
OpenAlex
W2995406300
Cited by
26
References
64
Citations by year
2026: 2 · 2025: 2 · 2024: 3 · 2023: 4 · 2022: 3 · 2021: 8 · 2020: 4
FWCI
2.54
Type
journal article
Language
en
Open access
Locations
  • Brain Research (publishedVersion)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute of Neurological Disorders and Stroke
Topics
  • Health Sciences › Medicine › Neurology › Amyotrophic Lateral Sclerosis Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
Keywords
C9orf72, amyotrophic lateral sclerosis, Fis1, synthetic lethality, CRISPR screen, mitochondrial fission, mitophagy, RAGE, advanced glycation end products, inflammation, immune regulation, myeloid cells
MeSH terms
Synthetic Lethal Mutations, C9orf72 Protein, RNA-Seq, Amyotrophic Lateral Sclerosis, Genetic Testing, Humans, Membrane Proteins, U937 Cells, Mitochondrial Proteins, Gene Knockout Techniques, Clustered Regularly Interspaced Short Palindromic Repeats

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