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Velazquez FN, Luberto C, Canals D, Hannun YA. Enzymes of sphingolipid metabolism as transducers of metabolic inputs. Biochem Soc Trans 2024; 52:1795-1808. [PMID: 39101614 DOI: 10.1042/bst20231442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/06/2024]
Abstract
Sphingolipids (SLs) constitute a discrete subdomain of metabolism, and they display both structural and signaling functions. Accumulating evidence also points to intimate connections between intermediary metabolism and SL metabolism. Given that many SLs exhibit bioactive properties (i.e. transduce signals), these raise the possibility that an important function of SLs is to relay information on metabolic changes into specific cell responses. This could occur at various levels. Some metabolites are incorporated into SLs, whereas others may initiate regulatory or signaling events that, in turn, modulate SL metabolism. In this review, we elaborate on the former as it represents a poorly appreciated aspect of SL metabolism, and we develop the hypothesis that the SL network is highly sensitive to several specific metabolic changes, focusing on amino acids (serine and alanine), various fatty acids, choline (and ethanolamine), and glucose.
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Affiliation(s)
- Fabiola N Velazquez
- From the Stony Brook Cancer Center, Stony Brook University, Stony Brook, NY 11794
- Department of Medicine, Stony Brook University, Stony Brook, NY 11794
| | - Chiara Luberto
- From the Stony Brook Cancer Center, Stony Brook University, Stony Brook, NY 11794
- Physiology and Biophysics, Stony Brook University, Stony Brook, NY 11794
| | - Daniel Canals
- From the Stony Brook Cancer Center, Stony Brook University, Stony Brook, NY 11794
- Department of Medicine, Stony Brook University, Stony Brook, NY 11794
| | - Yusuf A Hannun
- From the Stony Brook Cancer Center, Stony Brook University, Stony Brook, NY 11794
- Department of Medicine, Stony Brook University, Stony Brook, NY 11794
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Wilkerson JL, Tatum SM, Holland WL, Summers SA. Ceramides are fuel gauges on the drive to cardiometabolic disease. Physiol Rev 2024; 104:1061-1119. [PMID: 38300524 DOI: 10.1152/physrev.00008.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 01/23/2024] [Accepted: 01/25/2024] [Indexed: 02/02/2024] Open
Abstract
Ceramides are signals of fatty acid excess that accumulate when a cell's energetic needs have been met and its nutrient storage has reached capacity. As these sphingolipids accrue, they alter the metabolism and survival of cells throughout the body including in the heart, liver, blood vessels, skeletal muscle, brain, and kidney. These ceramide actions elicit the tissue dysfunction that underlies cardiometabolic diseases such as diabetes, coronary artery disease, metabolic-associated steatohepatitis, and heart failure. Here, we review the biosynthesis and degradation pathways that maintain ceramide levels in normal physiology and discuss how the loss of ceramide homeostasis drives cardiometabolic pathologies. We highlight signaling nodes that sense small changes in ceramides and in turn reprogram cellular metabolism and stimulate apoptosis. Finally, we evaluate the emerging therapeutic utility of these unique lipids as biomarkers that forecast disease risk and as targets of ceramide-lowering interventions that ameliorate disease.
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Affiliation(s)
- Joseph L Wilkerson
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, United States
| | - Sean M Tatum
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, United States
| | - William L Holland
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, United States
| | - Scott A Summers
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, United States
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Lin R, Li H, Lin W, Yang F, Bao X, Pan C, Lai L, Lin W. Whole-genome selection signature differences between Chaohu and Ji'an red ducks. BMC Genomics 2024; 25:522. [PMID: 38802792 PMCID: PMC11131323 DOI: 10.1186/s12864-024-10339-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Accepted: 04/23/2024] [Indexed: 05/29/2024] Open
Abstract
Assessing the genetic structure of local varieties and understanding their genetic data are crucial for effective management and preservation. However, the genetic differences among local breeds require further explanation. To enhance our understanding of their population structure and genetic diversity, we conducted a genome-wide comparative study of Chaohu and Ji'an Red ducks using genome sequence and restriction site-associated DNA sequencing technology. Our analysis revealed a distinct genetic distinction between the two breeds, leading to divided groups. The phylogenetic tree for Chaohu duck displayed two branches, potentially indicating minimal impact from artificial selection. Additionally, our ROH (runs of homozygosity) analysis revealed that Chaohu ducks had a lower average inbreeding coefficient than Ji'an Red ducks. We identified several genomic regions with high genetic similarity in these indigenous duck breeds. By conducting a selective sweep analysis, we identified 574 candidate genes associated with muscle growth (BMP2, ITGA8, MYLK, and PTCH1), fat deposits (ELOVL1 and HACD2), and pigmentation (ASIP and LOC101797494). These results offer valuable insights for the further enhancement and conservation of Chinese indigenous duck breeds.
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Affiliation(s)
- Ruiyi Lin
- College of Animal Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, People's Republic of China
| | - Huihuang Li
- College of Animal Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, People's Republic of China
| | - Weilong Lin
- College of Animal Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, People's Republic of China
| | - Fan Yang
- College of Animal Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, People's Republic of China
| | - Xinguo Bao
- College of Animal Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, People's Republic of China
| | - Chengfu Pan
- College of Animal Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, People's Republic of China
| | - Lianjie Lai
- College of Animal Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, People's Republic of China
| | - Weimin Lin
- College of Animal Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, People's Republic of China.
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Ghosh A, Peyot ML, Leung YH, Ravenelle F, Madiraju SRM, Prentki M. A peripherally restricted cannabinoid-1 receptor inverse agonist promotes insulin secretion and protects from cytokine toxicity in human pancreatic islets. Eur J Pharmacol 2023; 944:175589. [PMID: 36773683 DOI: 10.1016/j.ejphar.2023.175589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 01/30/2023] [Accepted: 02/08/2023] [Indexed: 02/11/2023]
Abstract
The cannabinoid receptor CB1R is expressed in pancreatic β-cells; CB1R increased activity is associated with diabetes, obesity, cardiovascular disorders as well as decreased insulin secretion and insulin resistance. CB1R was shown to signal through G-protein coupling as well as β-arrestins in β-cells. Peripherally restricted CB1R inverse agonists purportedly have beneficial effects on insulin secretion in β-cells, without the unwanted effects in the central nervous system. Here we show that a peripherally restricted CB1R inverse agonist, MRI-1891, augments glucose stimulated insulin secretion in isolated human pancreatic islets and mouse islets. The insulin secretion enhancing effect of MRI-1891 is comparable to exendin-4, an analogue of the glucagon like peptide-1 (GLP1). Moreover, MRI-1891 treatment protects isolated human islet cells against cytokine-induced apoptosis, similar to exendin-4. Thus, MRI-1891, a new class of CB1R inverse agonist, may be considered a potential therapeutic for both type 1 and type 2 diabetes because of its ability to protect pancreatic β-cells from cytokine toxicity and to promote insulin secretion.
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Affiliation(s)
- Anindya Ghosh
- Departments of Nutrition, Biochemistry and Molecular Medicine, Université de Montréal, Montreal Diabetes Research Center, CRCHUM, 900 Saint Denis Street, Montréal, QC, H2X 0A9, Canada
| | - Marie-Line Peyot
- Departments of Nutrition, Biochemistry and Molecular Medicine, Université de Montréal, Montreal Diabetes Research Center, CRCHUM, 900 Saint Denis Street, Montréal, QC, H2X 0A9, Canada
| | - Yat Hei Leung
- Departments of Nutrition, Biochemistry and Molecular Medicine, Université de Montréal, Montreal Diabetes Research Center, CRCHUM, 900 Saint Denis Street, Montréal, QC, H2X 0A9, Canada
| | - François Ravenelle
- Inversago Pharma Inc., 1100 Rene-Levesque West, Suite 1110, Montreal, QC, H3B 4N4, Canada
| | - S R Murthy Madiraju
- Departments of Nutrition, Biochemistry and Molecular Medicine, Université de Montréal, Montreal Diabetes Research Center, CRCHUM, 900 Saint Denis Street, Montréal, QC, H2X 0A9, Canada
| | - Marc Prentki
- Departments of Nutrition, Biochemistry and Molecular Medicine, Université de Montréal, Montreal Diabetes Research Center, CRCHUM, 900 Saint Denis Street, Montréal, QC, H2X 0A9, Canada.
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Vivoli A, Ghislain J, Filali-Mouhim A, Angeles ZE, Castell AL, Sladek R, Poitout V. Single-Cell RNA Sequencing Reveals a Role for Reactive Oxygen Species and Peroxiredoxins in Fatty Acid-Induced Rat β-Cell Proliferation. Diabetes 2023; 72:45-58. [PMID: 36191509 PMCID: PMC9797324 DOI: 10.2337/db22-0121] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Accepted: 09/24/2022] [Indexed: 01/19/2023]
Abstract
The functional mass of insulin-secreting pancreatic β-cells expands to maintain glucose homeostasis in the face of nutrient excess, in part via replication of existing β-cells. Type 2 diabetes appears when these compensatory mechanisms fail. Nutrients including glucose and fatty acids are important contributors to the β-cell compensatory response, but their underlying mechanisms of action remain poorly understood. We investigated the transcriptional mechanisms of β-cell proliferation in response to fatty acids. Isolated rat islets were exposed to 16.7 mmol/L glucose with or without 0.5 mmol/L oleate (C18:1) or palmitate (C16:0) for 48 h. The islet transcriptome was assessed by single-cell RNA sequencing. β-Cell proliferation was measured by flow cytometry. Unsupervised clustering of pooled β-cells identified different subclusters, including proliferating β-cells. β-Cell proliferation increased in response to oleate but not palmitate. Both fatty acids enhanced the expression of genes involved in energy metabolism and mitochondrial activity. Comparison of proliferating versus nonproliferating β-cells and pseudotime ordering suggested the involvement of reactive oxygen species (ROS) and peroxiredoxin signaling. Accordingly, N-acetyl cysteine and the peroxiredoxin inhibitor conoidin A both blocked oleate-induced β-cell proliferation. Our study reveals a key role for ROS signaling through peroxiredoxin activation in oleate-induced β-cell proliferation.
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Affiliation(s)
- Alexis Vivoli
- Montreal Diabetes Research Center, Montréal, Québec, Canada
- Department of Medicine, Université de Montréal, Montréal, Québec, Canada
- Centre de Recherche du Centre Hospitalier de l’Université de Montréal, Montréal, Québec, Canada
| | - Julien Ghislain
- Montreal Diabetes Research Center, Montréal, Québec, Canada
- Centre de Recherche du Centre Hospitalier de l’Université de Montréal, Montréal, Québec, Canada
| | - Ali Filali-Mouhim
- Centre de Recherche du Centre Hospitalier de l’Université de Montréal, Montréal, Québec, Canada
| | - Zuraya Elisa Angeles
- Montreal Diabetes Research Center, Montréal, Québec, Canada
- Department of Medicine, Université de Montréal, Montréal, Québec, Canada
- Centre de Recherche du Centre Hospitalier de l’Université de Montréal, Montréal, Québec, Canada
| | - Anne-Laure Castell
- Montreal Diabetes Research Center, Montréal, Québec, Canada
- Department of Medicine, Université de Montréal, Montréal, Québec, Canada
- Centre de Recherche du Centre Hospitalier de l’Université de Montréal, Montréal, Québec, Canada
| | - Robert Sladek
- Montreal Diabetes Research Center, Montréal, Québec, Canada
- Department of Human Genetics, McGill University and McGill Genome Centre, Montréal, Québec, Canada
| | - Vincent Poitout
- Montreal Diabetes Research Center, Montréal, Québec, Canada
- Department of Medicine, Université de Montréal, Montréal, Québec, Canada
- Centre de Recherche du Centre Hospitalier de l’Université de Montréal, Montréal, Québec, Canada
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