Cited by 45Autophagy in Disease and TherapyMitochondrial Function and PathologyMetabolism, Diabetes, and Cancer

Deletion of PRKAA triggers mitochondrial fission by inhibiting the autophagy-dependent degradation of DNM1L

Open access
Wang, Qilong, Wu, Shengnan, Zhu, Huaiping, Ding, Ye, Dai, Xiaoyan, Ouyang, Changhan, Han, Young-min, Xie, Zhonglin +1 more·2017·Autophagy

Abstract

PRKAA (protein kinase, AMP-activated, α catalytic subunit) regulates mitochondrial biogenesis, function, and turnover. However, the molecular mechanisms by which PRKAA regulates mitochondrial dynamics remain poorly characterized. Here, we report that PRKAA regulated mitochondrial fission via the autophagy-dependent degradation of DNM1L (dynamin 1-like). Deletion of Prkaa1/AMPKα1 or Prkaa2/AMPKα2 resulted in defective autophagy, DNM1L accumulation, and aberrant mitochondrial fragmentation in the mouse aortic endothelium. Furthermore, autophagy inhibition by chloroquine treatment or ATG7 small interfering RNA (siRNA) transfection, upregulated DNM1L expression and triggered DNM1L-mediated mitochondrial fragmentation. In contrast, autophagy activation by overexpression of ATG7 or chronic administration of rapamycin, the MTOR inhibitor, promoted DNM1L degradation and attenuated mitochondrial fragmentation in Prkaa2-deficient (prkaa2−/−) mice, suggesting that defective autophagy contributes to enhanced DNM1L expression and mitochondrial fragmentation. Additionally, the autophagic receptor protein SQSTM1/p62, which bound to DNM1L and led to its translocation into the autophagosome, was involved in DNM1L degradation by the autophagy-lysosome pathway. Gene silencing of SQSTM1 markedly reduced the association between SQSTM1 and DNM1L, impaired the degradation of DNM1L, and enhanced mitochondrial fragmentation in PRKAA-deficient endothelial cells. Finally, the genetic (DNM1L siRNA) or pharmacological (mdivi-1) inhibition of DNMA1L ablated mitochondrial fragmentation in the mouse aortic endothelium and prevented the acetylcholine-induced relaxation of isolated mouse aortas. This suggests that aberrant DNM1L is responsible for enhanced mitochondrial fragmentation and endothelial dysfunction in prkaa knockout mice. Overall, our results show that PRKAA deletion promoted mitochondrial fragmentation in vascular endothelial cells by inhibiting the autophagy-dependent degradation of DNM1L.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1080/15548627.2016.1263776

Cites

62 of 62 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • AMPK deletion promoted mitochondrial fragmentation in endothelial cells by inhibiting the autophagy-dependent degradation of DRP1.

    “Studies showed that AMPK deletion promoted mitochondrial fragmentation in ECs by inhibiting the autophagy-dependent degradation of DRP1 [105].”

    From AMPK, Mitochondrial Function, and Cardiovascular Disease (2020) · cites this paper as [105]

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

3 retracted

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Wang, Q., Wu, S., Zhu, H., Ding, Y., Dai, X., Ouyang, C., Han, Y.-M., Xie, Z., & Zou, M.-H.
Affiliations
Georgia State University (US)
Corresponding author
  • Xie, Zhonglin
  • Zou, Ming-Hui
Venue
Autophagy
Published
2017-01-13
Volume
13
Issue
2
Pages
404-422
ISSN
  • 1554-8627 (ISSN-L)
  • 1554-8635
OpenAlex
W2577260066
Cited by
45
References
62
Citations by year
2026: 3 · 2025: 3 · 2024: 8 · 2023: 4 · 2022: 6 · 2021: 6 · 2020: 8 · 2019: 2 · 2018: 3 · 2017: 2
FWCI
3.21
Type
journal article
Language
en
Open access
Locations
  • Autophagy (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (HL080499, HL137371)
  • National Institute on Aging (R01AG047776)
  • National Heart, Lung, and Blood Institute (R01HL079584, R01HL132500, R01HL110488, R01HL089920)
  • National Cancer Institute (R01CA213022)
Topics
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
Keywords
AMPK, Drp1, mitochondrial fission, mitochondrial fragmentation, p62, autophagosomes, ATG7, Mdivi-1, endothelial dysfunction, aortic endothelium, vasorelaxation, acetylcholine
MeSH terms
Sequestosome-1 Protein, Animals, Aorta, Autophagy, Cell Separation, Endothelium, Vascular, Humans, Mice, Inbred C57BL, Microtubule-Associated Proteins, Phosphorylation, Phosphoserine, Vasodilation, Gene Deletion, Sirolimus, GTP Phosphohydrolases, Mitochondrial Proteins, Dynamins, AMP-Activated Protein Kinases, Proteolysis, Human Umbilical Vein Endothelial Cells, Mitochondrial Dynamics

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review