Cited by 73Chronic Kidney Disease and DiabetesHeme Oxygenase-1 and Carbon MonoxideGenetic and Kidney Cyst Diseases

Loss of biliverdin reductase-A promotes lipid accumulation and lipotoxicity in mouse proximal tubule cells

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Adeosun, Samuel O., Gordon, Darren M., Weeks, Mary Frances, Moore, Kyle H., Hall, John E., Hinds, Terry D., Stec, David E.·2018·American Journal of Physiology-Renal Physiology

Abstract

Obesity and increased lipid availability have been implicated in the development and progression of chronic kidney disease. One of the major sites of renal lipid accumulation is in the proximal tubule cells of the kidney, suggesting that these cells may be susceptible to lipotoxicity. We previously demonstrated that loss of hepatic biliverdin reductase A (BVRA) causes fat accumulation in livers of mice on a high-fat diet. To determine the role of BVRA in mouse proximal tubule cells, we generated a CRISPR targeting BVRA for a knockout in mouse proximal tubule cells (BVRA KO). The BVRA KO cells had significantly less metabolic potential and mitochondrial respiration, which was exacerbated by treatment with palmitic acid, a saturated fatty acid. The BVRA KO cells also showed increased intracellular triglycerides which were associated with higher fatty acid uptake gene cluster of differentiation 36 as well as increased de novo lipogenesis as measured by higher neutral lipids. Additionally, neutrophil gelatinase-associated lipocalin 1 expression, annexin-V FITC staining, and lactate dehydrogenase assays all demonstrated that BVRA KO cells are more sensitive to palmitic acid-induced lipotoxicity than wild-type cells. Phosphorylation of BAD which plays a role in cell survival pathways, was significantly reduced in palmitic acid-treated BVRA KO cells. These data demonstrate the protective role of BVRA in proximal tubule cells against saturated fatty acid-induced lipotoxicity and suggest that activating BVRA could provide a benefit in protecting from obesity-induced kidney injury.

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Crossref · 10.1152/ajprenal.00495.2017

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  • Excessive renal sinus fat and perirenal fat may also cause lipotoxicity owing to the accumulation of intracellular triglycerides and toxic metabolites such as ceramides.

    “Excessive RSF and PRF may also cause lipotoxicity owing to the accumulation of intracellular triglycerides and toxic metabolites such as ceramides57,58.”

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Authors
Adeosun, S. O., Gordon, D. M., Weeks, M. F., Moore, K. H., Hall, J. E., Hinds, T. D., & Stec, D. E.
Affiliations
  • University of Mississippi Medical Center (US)
  • University of Toledo (US)
Corresponding author
Stec, David E.
Venue
American Journal of Physiology-Renal Physiology
Published
2018-08-01
Volume
315
Issue
2
Pages
F323-F331
ISSN
  • 1522-1466 (ISSN-L)
  • 1931-857X
OpenAlex
W2795948416
Cited by
73
References
47
Citations by year
2026: 5 · 2025: 10 · 2024: 10 · 2023: 13 · 2022: 10 · 2021: 8 · 2020: 6 · 2019: 10 · 2018: 1
FWCI
5.12
Type
journal article
Language
en
Open access
Locations
  • American Journal of Physiology-Renal Physiology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • HHS | NIH | National Heart, Lung, and Blood Institute (NHBLI) (1T32HL105324, PO1HL-051971, K01HL-125445)
  • HHS | NIH | National Institute of General Medical Sciences (NIGMS) (P20GM-104357)
Topics
  • Health Sciences › Medicine › Nephrology › Chronic Kidney Disease and Diabetes
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Heme Oxygenase-1 and Carbon Monoxide
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic and Kidney Cyst Diseases
Keywords
biliverdin reductase A, lipotoxicity, proximal tubular epithelial cells, renal lipid accumulation, palmitic acid, saturated fatty acids, de novo lipogenesis, triglyceride accumulation, mitochondrial respiration, Bad phosphorylation, apoptosis, chronic kidney disease, CRISPR knockout
MeSH terms
Lipocalin-2, Gene Editing, Animals, Cells, Cultured, Energy Metabolism, Kidney Tubules, Proximal, L-Lactate Dehydrogenase, Mitochondria, Phosphorylation, Triglycerides, Apoptosis, Gene Deletion, CD36 Antigens, Palmitic Acid, Oxidoreductases Acting on CH-CH Group Donors, Lipogenesis, bcl-Associated Death Protein, Mice, CRISPR-Cas Systems

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