Cited by 592Inflammasome and immune disordersRetinal Diseases and TreatmentsRetinal Development and Disorders

DICER1 loss and Alu RNA induce age-related macular degeneration via the NLRP3 inflammasome and MyD88

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Tarallo, Valeria, Hirano, Yoshio, Gelfand, Bradley D., Dridi, Sami, Kerur, Nagaraj, Kim, Younghee, Cho, Won Gil, Kaneko, Hiroki +21 more·2012·Cell

Abstract

Alu RNA accumulation due to DICER1 deficiency in the retinal pigmented epithelium (RPE) is implicated in geographic atrophy (GA), an advanced form of age-related macular degeneration that causes blindness in millions of individuals. The mechanism of Alu RNA-induced cytotoxicity is unknown. Here we show that DICER1 deficit or Alu RNA exposure activates the NLRP3 inflammasome and triggers TLR-independent MyD88 signaling via IL18 in the RPE. Genetic or pharmacological inhibition of inflammasome components (NLRP3, Pycard, Caspase-1), MyD88, or IL18 prevents RPE degeneration induced by DICER1 loss or Alu RNA exposure. These findings, coupled with our observation that human GA RPE contains elevated amounts of NLRP3, PYCARD, and IL18 and evidence of increased Caspase-1 and MyD88 activation, provide a rationale for targeting this pathway in GA. Our findings also reveal a function of the inflammasome outside the immune system and an immunomodulatory action of mobile elements.

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Crossref · 10.1016/j.cell.2012.03.036

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  • AMD has been associated with downregulation of DICER1, and consequent elevation of Alu RNA levels activates the NLRP3 inflammasome in retinal pigmented epithelial cells, leading to cytotoxicity and degeneration.

    “AMD has been associated with the downregulation DICER1, and the consequent elevation of Alu RNA levels activates the NLRP3 (NOD, LRR and pyrin domain containing protein 3) inflammasome in retinal pigmented epithelial cells, leading to cytotoxicity and degeneration128.”
  • Alu RNA activates the NLRP3 inflammasome, stimulating cytokine production and MyD88-induced cytotoxicity of RPE cells, thus contributing to the etiology of GA.

    “The latter then activates the NLRP3 inflammasome, stimulating cytokine production and MyD88-induced cytotoxicity of RPE cells, thus contributing to the etiology of GA (Tarallo et al., 2012).”

    From Cytoplasmic DNA: sources, sensing, and role in aging and disease (2021) · cites this paper as Tarallo et al., 2012

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Authors
Tarallo, V., Hirano, Y., Gelfand, B. D., Dridi, S., Kerur, N., Kim, Y., Cho, W. G., Kaneko, H., Fowler, B. J., Bogdanovich, S., Albuquerque, R. J. C., Hauswirth, W. W., Chiodo, V. A., Kugel, J. F., Goodrich, J. A., Ponicsan, S. L., Chaudhuri, G., Murphy, M. P., Dunaief, J. L., Ambati, B. K., Ogura, Y., Yoo, J. W., Lee, D.-K., Provost, P., Hinton, D. R., Núñez, G., Baffi, J. Z., Kleinman, M. E., & Ambati, J.
Affiliations
  • University of Kentucky (US)
  • University of Florida (US)
  • University of Colorado Boulder (US)
  • Meharry Medical College (US)
  • MRC Mitochondrial Biology Unit (GB)
  • University of Pennsylvania (US)
  • University of Utah (US)
  • Nagoya City University (JP)
  • Sungkyunkwan University (KR)
  • Centre hospitalier universitaire de Québec (CA)
  • University of Southern California (US)
  • University of Michigan (US)
Corresponding author
Ambati, Jayakrishna
Venue
Cell
Publisher
Elsevier BV
Published
2012-05
Volume
149
Issue
4
Pages
847-859
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2111586778
Cited by
592
References
93
Citations by year
2026: 17 · 2025: 19 · 2024: 41 · 2023: 32 · 2022: 39 · 2021: 57 · 2020: 53 · 2019: 34 · 2018: 48 · 2017: 40 · 2016: 46 · 2015: 53 · 2014: 53 · 2013: 38 · 2012: 21
FWCI
21.23
Type
journal article
Language
en
Open access
Locations
  • Cell (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (TL1TR000115, 1ul1rr033173-01, UL1TR000117, UL1TR001998)
  • National Heart, Lung, and Blood Institute (T32HL091812)
  • National Eye Institute (R01EY020672, P30EY003040, R01EY017950, P30EY021721, R01EY018836, K08EY021521, R01EY001545, R01EY018350, R21EY019778, RC1EY020442, R01EY017182, K08EY021757, R01EY022238)
  • National Institute of General Medical Sciences (R01GM068414)
  • National Institute of Allergy and Infectious Diseases (R01AI063331)
  • National Institute of Arthritis and Musculoskeletal and Skin Diseases (R01AR052756)
  • National Center for Research Resources (UL1RR-033173, TL1RR033172)
  • National Center for Advancing Translational Sciences
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Inflammasome and immune disorders
  • Health Sciences › Medicine › Ophthalmology › Retinal Diseases and Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Retinal Development and Disorders
Keywords
DICER1, Alu RNA, age-related macular degeneration, geographic atrophy, retinal pigment epithelium, NLRP3 inflammasome, MyD88 signaling, IL-18, caspase-1, PYCARD, transposable elements, RNA interference, retinal degeneration
MeSH terms
NLR Family, Pyrin Domain-Containing 3 Protein, Animals, Carrier Proteins, Humans, Alu Elements, Ribonuclease III, Toll-Like Receptors, Mice, DEAD-box RNA Helicases, Myeloid Differentiation Factor 88, Retinal Pigment Epithelium, Geographic Atrophy, Inflammasomes

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