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Ibrahim MA, Isah MB, Inim MD, Abdullahi AD, Adamu A. The connections of sialic acids and diabetes mellitus: therapeutic or diagnostic value? Glycobiology 2024; 34:cwae053. [PMID: 39041707 DOI: 10.1093/glycob/cwae053] [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: 03/11/2024] [Revised: 06/16/2024] [Accepted: 07/19/2024] [Indexed: 07/24/2024] Open
Abstract
Modulation of sialic acids is one of the important pathological consequences of both type 1 and type 2 diabetes mellitus with or without the micro- and macrovascular complications. However, the mechanistic, therapeutic and/or diagnostic implications of these observations are uncoordinated and possibly conflicting. This review critically analyses the scientific investigations connecting sialic acids with diabetes mellitus. Generally, variations in the levels and patterns of sialylation, fucosylation and galactosylation were predominant across various tissues and body systems of diabetic patients, but the immune system seemed to be most affected. These might be explored as a basis for differential diagnosis of various diabetic complications. Sialic acids are predominantly elevated in nearly all forms of diabetic conditions, particularly nephropathy and retinopathy, which suggests some diagnostic value but the mechanistic details were not unequivocal from the available data. The plausible mechanistic explanations for the elevated sialic acids are increased desialylation by sialidases, stimulation of hexosamine pathway and synthesis of acute phase proteins as well as oxidative stress. Additionally, sialic acids are also profoundly associated with glucose transport and insulin resistance in human-based studies while animal-based studies revealed that the increased desialylation of insulin receptors by sialidases, especially NEU1, might be the causal link. Interestingly, inhibition of the diabetes-associated NEU1 desialylation was beneficial in diabetes management and might be considered as a therapeutic target. It is hoped that the article will provide an informed basis for future research activities on the exploitation of sialic acids and glycobiology for therapeutic and/or diagnostic purposes against diabetes mellitus.
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Affiliation(s)
| | - Murtala Bindawa Isah
- Department of Biochemistry, Umaru Musa Yar'adua University, P.M.B. 2218, Katsina, Nigeria
| | - Mayen David Inim
- Department of Biochemistry, Ahmadu Bello University, Samaru, 80001, Zaria, Nigeria
| | | | - Auwal Adamu
- Department of Biochemistry, Ahmadu Bello University, Samaru, 80001, Zaria, Nigeria
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Wei B, Li Y, Ao M, Shao W, Wang K, Rong T, Zhou Y, Chen Y. Ganglioside GM3-Functionalized Reconstituted High-Density Lipoprotein (GM3-rHDL) as a Novel Nanocarrier Enhances Antiatherosclerotic Efficacy of Statins in apoE -/- C57BL/6 Mice. Pharmaceutics 2022; 14:pharmaceutics14112534. [PMID: 36432725 PMCID: PMC9698139 DOI: 10.3390/pharmaceutics14112534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 11/15/2022] [Accepted: 11/17/2022] [Indexed: 11/22/2022] Open
Abstract
Previously, we found that exogenous ganglioside GM3 had an antiatherosclerotic efficacy and that its antiatherosclerotic efficacy could be enhanced by reconstituted high-density lipoprotein (rHDL). In this study, we hypothesized that GM3-functionalized rHDL (i.e., GM3-rHDL) as a nanocarrier can promote the efficacy of traditional antiatherosclerotic drugs (e.g., statins). To test this hypothesis, lovastatin (LT) was used as a representative of statins, and LT-loaded GM3-rHDL nanoparticle (LT-GM3-rHDL or LT@GM3-rHDL; a mean size of ~142 nm) and multiple controls (e.g., GM3-rHDL without LT, LT-loaded rHDL or LT-rHDL, and other nanoparticles) were prepared. By using two different microsphere-based methods, the presences of apolipoprotein A-I (apoA-I) and/or GM3 in nanoparticles and the apoA-I-mediated macrophage-targeting ability of apoA-I/rHDL-containing nanoparticles were verified in vitro. Moreover, LT-GM3-rHDL nanoparticle had a slowly sustained LT release in vitro and the strongest inhibitory effect on the foam cell formation of macrophages (a key event of atherogenesis). After single administration of rHDL-based nanoparticles, a higher LT concentration was detected shortly in the atherosclerotic plaques of apoE-/- mice than non-rHDL-based nanoparticles, suggesting the in vivo plaque-targeting ability of apoA-I/rHDL-containing nanoparticles. Finally, among all nanoparticles LT-GM3-rHDL induced the largest decreases in the contents of blood lipids and in the areas of atherosclerotic plaques at various aortic locations in apoE-/- mice fed a high-fat diet for 12 weeks, supporting that LT-GM3-rHDL has the best in vivo antiatherosclerotic efficacy among the tested nanoparticles. Our data imply that GM3-functionalized rHDL (i.e., GM3-rHDL) can be utilized as a novel nanocarrier to enhance the efficacy of traditional antiatherosclerotic drugs (e.g., statins).
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Affiliation(s)
- Bo Wei
- College of Life Sciences, Nanchang University, Nanchang 330031, China
| | - Yuanfang Li
- Jiangxi Key Laboratory for Microscale Interdisciplinary Study, Institute for Advanced Study, Nanchang University, Nanchang 330031, China
| | - Meiying Ao
- School of Chinese Medicine & Life Science, Jiangxi University of Chinese Medicine, Nanchang 330025, China
| | - Wenxiang Shao
- School of Chinese Medicine & Life Science, Jiangxi University of Chinese Medicine, Nanchang 330025, China
| | - Kun Wang
- Jiangxi Key Laboratory for Microscale Interdisciplinary Study, Institute for Advanced Study, Nanchang University, Nanchang 330031, China
| | - Tong Rong
- College of Life Sciences, Nanchang University, Nanchang 330031, China
- Jiangxi Key Laboratory for Microscale Interdisciplinary Study, Institute for Advanced Study, Nanchang University, Nanchang 330031, China
| | - Yun Zhou
- College of Life Sciences, Nanchang University, Nanchang 330031, China
- Jiangxi Key Laboratory for Microscale Interdisciplinary Study, Institute for Advanced Study, Nanchang University, Nanchang 330031, China
| | - Yong Chen
- College of Life Sciences, Nanchang University, Nanchang 330031, China
- Jiangxi Key Laboratory for Microscale Interdisciplinary Study, Institute for Advanced Study, Nanchang University, Nanchang 330031, China
- Correspondence: or ; Tel./Fax: +86-(791)-83969963
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Advanced glycation end products induce Aβ 1-42 deposition and cognitive decline through H19/miR-15b/BACE1 axis in diabetic encephalopathy. Brain Res Bull 2022; 188:187-196. [PMID: 35961529 DOI: 10.1016/j.brainresbull.2022.08.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 07/26/2022] [Accepted: 08/08/2022] [Indexed: 11/23/2022]
Abstract
OBJECTIVE Diabetic encephalopathy (DE), a chronic complication of diabetes, is characterized by decline of cognitive function. The molecular mechanism of DE remains unclear. The purpose of this study is to evaluate the roles of advanced glycation end products (AGEs) in the pathogenesis of DE and investigate its underlying mechanisms in this process. METHODS DE rats were developed by incorporating a high-fat diet and streptozotocin injection followed by the Morris Water Maze test. HT-22 cells were used to mimic the in vitro neuronal injuries of DE. Expression levels of long non-coding RNA H19, miR-15b and β-site amyloid precursor protein cleaving enzyme 1 (BACE1) mRNA in the hippocampus of DE rats or HT-22 cells were detected by quantitative real-time polymerase chain reaction (qRT-PCR). The levels of BACE1 proteins were analyzed by western blotting or immunohistochemical staining. The contents of Aβ1-42 in supernatant of the cell culture were analyzed by enzyme-linked immu-nosorbent assay (ELISA). The relationship between H19 or BACE1 and miR-15b was verified with dual-luciferase reporter assay. RESULTS We found that the accumulation of Aβ1-42 and the phosphorylation of Tau (Ser404) were increased in the hippocampus CA3 regionof DE rats. MiR-15b was downregulated while H19 and BACE1 were upregulated in the hippocampus CA3 regionof DE rats and AGEs-treated HT-22 cells. The expression of BACE1 protein was negatively regulated by miR-15b at the post-transcriptional level in HT-22 cells. In vivo, administration of miR-15b mimics by the intranasal delivery markedly decreased the BACE1 protein in hippocampal CA3 region and improved the cognitive decline in DE rats. Besides, the luciferase activity assay confirmed the binding site of miR-15b to both the 3'-untranslated region (3'-UTR) of BACE1 mRNA and H19. Then, miR-15b inhibitor reversed H19 knockdown-mediated decrease of Aβ1-42 level in AGEs-treated HT-22 cells. CONCLUSION These results suggested that AGEs induced Aβ1-42 deposition andcognitive decline through H19/miR-15b/ BACE1 axis in DE.
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Liang CC, Shaw SW, Huang YH, Lee TH. Human amniotic fluid stem cell therapy can help regain bladder function in type 2 diabetic rats. World J Stem Cells 2022; 14:330-346. [PMID: 35722197 PMCID: PMC9157602 DOI: 10.4252/wjsc.v14.i5.330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 01/03/2022] [Accepted: 04/25/2022] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Diabetes mellitus (DM) is a serious and growing global health burden. It is estimated that 80% of diabetic patients have micturition problems such as poor emptying, urinary incontinence, urgency, and urgency incontinence. Patients with diabetic bladder dysfunction are often resistant to currently available therapies. It is necessary to develop new and effective treatment methods.
AIM To examine the therapeutic effect of human amniotic fluid stem cells (hAFSCs) therapy on bladder dysfunction in a type 2 diabetic rat model.
METHODS Sixty female Sprague-Dawley rats were divided into five groups: Group 1, normal-diet control (control); group 2, high-fat diet (HFD); group 3, HFD plus streptozotocin-induced DM (DM); group 4, DM plus insulin treatment (DM + insulin); group 5, DM plus hAFSCs injection via tail vein (DM + hAFSCs). Conscious cystometric studies were done at 4 and 12 wk after insulin or hAFSCs treatment to measure peak voiding pressure, voided volume, intercontraction interval, bladder capacity, and residual volume. Immunoreactivities and/or mRNA expression of muscarinic receptors, nerve growth factor (NGF), and sensory nerve markers in the bladder and insulin, MafA, and pancreatic-duodenal homeobox-1 (PDX-1) in pancreatic beta cells were studied.
RESULTS Compared with DM rats, insulin but not hAFSCs treatment could reduce the bladder weight and improve the voided volume, intercontraction interval, bladder capacity, and residual volume (P < 0.05). However, both insulin and hAFSCs treatment could help to regain the blood glucose and bladder functions to the levels near controls (P > 0.05). The immunoreactivities and mRNA expression of M2- and M3-muscarinic receptors (M2 and M3) were increased mainly at 4 wk (P < 0.05), while the number of beta cells in islets and the immunoreactivities and/or mRNA of NGF, calcitonin gene-related peptide (CGRP), substance P, insulin, MafA, and PDX-1 were decreased in DM rats (P < 0.05). However, insulin and hAFSCs treatment could help to regain the expression of M2, M3, NGF, CGRP, substance P, MafA, and PDX-1 to near the levels of controls at 4 and/or 12 wk (P > 0.05).
CONCLUSION Insulin but not hAFSCs therapy can recover the bladder dysfunction caused by DM; however, hAFSCs and insulin therapy can help to regain bladder function to near the levels of control.
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Affiliation(s)
- Ching-Chung Liang
- Female Urology Section, Department of Obstetrics and Gynecology, Linkou Chang Gung Memorial Hospital, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan
| | - Steven W Shaw
- Division of Obstetrics, Department of Obstetrics and Gynecology, Taipei Chang Gung Memorial Hospital, Taipei 105, Taiwan
- Prenatal Cell and Gene Therapy Group, Institute for Women’s Health, University College London, London WC1E 6BT, United Kingdom
| | - Yung-Hsin Huang
- Female Urology Section, Department of Obstetrics and Gynecology, Linkou Chang Gung Memorial Hospital, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan
| | - Tsong-Hai Lee
- Stroke Center and Department of Neurology, Linkou Chang Gung Memorial Hospital, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan
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Inim MD, Ibrahim MA, Isah MB, Onyike E. Variations in the mRNA expression level of UDP-GlcNAc epimerase/ManNAc kinase and neuraminidase 1 genes in organs of type 2 diabetic animals. Glycoconj J 2021; 38:129-134. [PMID: 33608771 DOI: 10.1007/s10719-021-09979-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 01/13/2021] [Accepted: 02/10/2021] [Indexed: 12/21/2022]
Abstract
Sialic acid and its associated metabolic enzymes have emerged as important components of the pathophysiology of type 2 diabetes (T2D). There is an elevation in the serum concentration of sialic acid in humans and animals with T2D. The present study investigated the modulation of mRNA expression level of UDP-N-acetylglucosamine-2-epimerase/N-acetylmannosamine kinase (GNE) and neuraminidase 1 (NEU1) genes in some organs of type 2 diabetic rats. T2D was induced using fructose-streptozotocin model and eight weeks after the induction of diabetes, sialic acid was assayed in the blood and organs (adipose tissue, brain, colon, kidney, liver, pancreas, skeletal muscle and spleen) followed by quantification of mRNA expression level of GNE and NEU1 genes by qPCR. The results showed a significant (P < 0.05) increase in sialic acid level in the serum and all the afore-mentioned organs investigated except in the adipose tissue and skeletal muscle of the diabetic rats compared the normal control. The expression GNE gene was only increased in the pancreas (1.8-fold) of the diabetic rats while there was a decrease in the expression of the gene in the colon. In contrast, the expression of NEU1 gene was increased in the spleen (3.5-fold), brain (2.2-fold), liver (1.9-fold), colon (1.5-fold) and kidney of the diabetic rats. It was concluded that the elevated level of sialic acid in the organs of diabetic rats, except the pancreas, might not be due to increased endogenous synthesis of sialic acid.
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Affiliation(s)
- Mayen David Inim
- Department of Biochemistry, Ahmadu Bello University, Zaria, Nigeria
| | | | | | - Elewechi Onyike
- Department of Biochemistry, Ahmadu Bello University, Zaria, Nigeria
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In Vitro Exposure of Leukocytes to HIV Preexposure Prophylaxis Decreases Mitochondrial Function and Alters Gene Expression Profiles. Antimicrob Agents Chemother 2020; 65:AAC.01755-20. [PMID: 33020165 PMCID: PMC7927818 DOI: 10.1128/aac.01755-20] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 10/01/2020] [Indexed: 12/21/2022] Open
Abstract
The use of antiretroviral therapy (ART) as preexposure prophylaxis (PrEP) is an effective strategy for preventing HIV acquisition. The cellular consequences of PrEP exposure, however, have not been sufficiently explored to determine potential effects on health in individuals without HIV. In this study, peripheral blood mononuclear cells (PBMCs) from people without HIV were exposed to tenofovir disoproxil fumarate (TDF) or emtricitabine (FTC) overnight. Mitochondrial mass and function were measured by flow cytometry and an Agilent XFp analyzer. The use of antiretroviral therapy (ART) as preexposure prophylaxis (PrEP) is an effective strategy for preventing HIV acquisition. The cellular consequences of PrEP exposure, however, have not been sufficiently explored to determine potential effects on health in individuals without HIV. In this study, peripheral blood mononuclear cells (PBMCs) from people without HIV were exposed to tenofovir disoproxil fumarate (TDF) or emtricitabine (FTC) overnight. Mitochondrial mass and function were measured by flow cytometry and an Agilent XFp analyzer. Monocyte-derived macrophages (MDMs) were differentiated in 20% autologous serum for 5 days in the presence or absence of TDF or FTC, and surface markers, lipid uptake, and efferocytosis were measured by flow cytometry. MDM gene expression was measured using transcriptome sequencing (RNA-seq). Plasma lipids were measured using mass spectrometry. PBMCs exposed to TDF or FTC had decreased maximal oxygen consumption rate (OCR) and reduced mitochondrial mass. Exposure to PrEP also increased reactive oxygen species (ROS) production from monocyte subsets. Compared to MDMs cultured in medium alone, cells differentiated in the presence of TDF (829 genes) or FTC (888 genes) had significant changes in gene expression. Further, PrEP-exposed MDMs had decreased mitochondrial mass and displayed increased lipid uptake and reduced efferocytosis. Plasma biomarkers and lipid levels were also altered in vivo in individuals receiving a PrEP regimen. In conclusion, exposure of leukocytes to TDF or FTC resulted in decreased mitochondrial function and altered functional and transcriptional profiles. These findings may have important implications for the metabolic and immunologic consequences of PrEP in populations at risk for HIV acquisition.
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Cas MD, Roda G, Li F, Secundo F. Functional Lipids in Autoimmune Inflammatory Diseases. Int J Mol Sci 2020; 21:E3074. [PMID: 32349258 PMCID: PMC7246500 DOI: 10.3390/ijms21093074] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 04/22/2020] [Accepted: 04/24/2020] [Indexed: 12/27/2022] Open
Abstract
Lipids are apolar small molecules known not only as components of cell membranes but also, in recent literature, as modulators of different biological functions. Herein, we focused on the bioactive lipids that can influence the immune responses and inflammatory processes regulating vascular hyperreactivity, pain, leukocyte trafficking, and clearance. In the case of excessive pro-inflammatory lipid activity, these lipids also contribute to the transition from acute to chronic inflammation. Based on their biochemical function, these lipids can be divided into different families, including eicosanoids, specialized pro-resolving mediators, lysoglycerophospholipids, sphingolipids, and endocannabinoids. These bioactive lipids are involved in all phases of the inflammatory process and the pathophysiology of different chronic autoimmune diseases such as rheumatoid arthritis, multiple sclerosis, type-1 diabetes, and systemic lupus erythematosus.
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Affiliation(s)
- Michele Dei Cas
- Department of Health Sciences, Università degli Studi di Milano, 20142 Milan, Italy
| | - Gabriella Roda
- Department of Pharmaceutical Sciences, Università degli Studi di Milano, 20133 Milan, Italy
| | - Feng Li
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, China
| | - Francesco Secundo
- Istituto di Scienze e Tecnologie Chimiche “Giulio Natta”, Consiglio Nazionale delle Ricerche, 20131 Milan, Italy
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Yamanaka K, Takahashi Y, Azuma Y, Hantani Y. Assay Development and Screening for the Identification of Ganglioside GM3 Synthase Inhibitors. Biochemistry 2020; 59:1242-1251. [DOI: 10.1021/acs.biochem.0c00055] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Kenji Yamanaka
- Biological/Pharmacological Research Laboratories, Central Pharmaceutical Research Institute, Japan Tobacco Inc., 1-1 Murasaki-cho, Takatsuki, Osaka 569-1125, Japan
| | - Yu Takahashi
- Biological/Pharmacological Research Laboratories, Central Pharmaceutical Research Institute, Japan Tobacco Inc., 1-1 Murasaki-cho, Takatsuki, Osaka 569-1125, Japan
| | - Yuya Azuma
- Biological/Pharmacological Research Laboratories, Central Pharmaceutical Research Institute, Japan Tobacco Inc., 1-1 Murasaki-cho, Takatsuki, Osaka 569-1125, Japan
| | - Yoshiji Hantani
- Biological/Pharmacological Research Laboratories, Central Pharmaceutical Research Institute, Japan Tobacco Inc., 1-1 Murasaki-cho, Takatsuki, Osaka 569-1125, Japan
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Jennemann R, Kaden S, Volz M, Nordström V, Herzer S, Sandhoff R, Gröne HJ. Gangliosides modulate insulin secretion by pancreatic beta cells under glucose stress. Glycobiology 2020; 30:722-734. [PMID: 32149357 DOI: 10.1093/glycob/cwaa022] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 02/18/2020] [Accepted: 03/02/2020] [Indexed: 02/06/2023] Open
Abstract
In pancreatic beta cells, the entry of glucose and downstream signaling for insulin release is regulated by the glucose transporter 2 (Glut2) in rodents. Dysfunction of the insulin-signaling cascade may lead to diabetes mellitus. Gangliosides, sialic acid-containing glycosphingolipids (GSLs), have been reported to modulate the function of several membrane proteins.Murine islets express predominantly sialylated GSLs, particularly the simple gangliosides GM3 and GD3 having a potential modulatory role in Glut2 activity. Conditional, tamoxifen-inducible gene targeting in pancreatic islets has now shown that mice lacking the glucosylceramide synthase (Ugcg), which represents the rate-limiting enzyme in GSL biosynthesis, displayed impaired glucose uptake and showed reduced insulin secretion. Consequently, mice with pancreatic GSL deficiency had higher blood glucose levels than respective controls after intraperitoneal glucose application. High-fat diet feeding enhanced this effect. GSL-deficient islets did not show apoptosis or ER stress and displayed a normal ultrastructure. Their insulin content, size and number were similar as in control islets. Isolated beta cells from GM3 synthase null mice unable to synthesize GM3 and GD3 also showed lower glucose uptake than respective control cells, corroborating the results obtained from the cell-specific model. We conclude that in particular the negatively charged gangliosides GM3 and GD3 of beta cells positively influence Glut2 function to adequately respond to high glucose loads.
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Affiliation(s)
- Richard Jennemann
- Department of Cellular and Molecular Pathology, German Cancer Research Center, Im Neuenheimer Feld 280, Heidelberg 69120, Germany.,Lipid Pathobiochemistry Group, German Cancer Research Center, Im Neuenheimer Feld 280, Heidelberg 69120, Germany
| | - Sylvia Kaden
- Department of Cellular and Molecular Pathology, German Cancer Research Center, Im Neuenheimer Feld 280, Heidelberg 69120, Germany
| | - Martina Volz
- Department of Cellular and Molecular Pathology, German Cancer Research Center, Im Neuenheimer Feld 280, Heidelberg 69120, Germany
| | - Viola Nordström
- Department of Cellular and Molecular Pathology, German Cancer Research Center, Im Neuenheimer Feld 280, Heidelberg 69120, Germany
| | - Silke Herzer
- Department of Cellular and Molecular Pathology, German Cancer Research Center, Im Neuenheimer Feld 280, Heidelberg 69120, Germany
| | - Roger Sandhoff
- Department of Cellular and Molecular Pathology, German Cancer Research Center, Im Neuenheimer Feld 280, Heidelberg 69120, Germany.,Lipid Pathobiochemistry Group, German Cancer Research Center, Im Neuenheimer Feld 280, Heidelberg 69120, Germany
| | - Hermann-Josef Gröne
- Department of Cellular and Molecular Pathology, German Cancer Research Center, Im Neuenheimer Feld 280, Heidelberg 69120, Germany.,Institute of Pharmacology, University of Marburg, Karl-von-Frisch-Straße 2 Marburg 35043, Germany
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Zhang ZD, Ren H, Wang WX, Shen GY, Huang JJ, Zhan MQ, Tang JJ, Yu X, Zhang YZ, Liang D, Yang ZD, Jiang XB. IGF-1R/β-catenin signaling axis is involved in type 2 diabetic osteoporosis. J Zhejiang Univ Sci B 2020; 20:838-848. [PMID: 31489803 DOI: 10.1631/jzus.b1800648] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Insulin-like growth factor-1 receptor (IGF-1R) is involved in both glucose and bone metabolism. IGF-1R signaling regulates the canonical Wnt/β-catenin signaling pathway. In this study, we investigated whether the IGF-1R/ β-catenin signaling axis plays a role in the pathogenesis of diabetic osteoporosis (DOP). Serum from patients with or without DOP was collected to measure the IGF-1R level using enzyme-linked immunosorbent assay (ELISA). Rats were given streptozotocin following a four-week high-fat diet induction (DOP group), or received vehicle after the same period of a normal diet (control group). Dual energy X-ray absorption, a biomechanics test, and hematoxylin-eosin (HE) staining were performed to evaluate bone mass, bone strength, and histomorphology, respectively, in vertebrae. Quantitative real-time polymerase chain reaction (qRT-PCR) and western blotting were performed to measure the total and phosphorylation levels of IGF-1R, glycogen synthase kinase-3β (GSK-3β), and β-catenin. The serum IGF-1R level was much higher in patients with DOP than in controls. DOP rats exhibited strikingly reduced bone mass and attenuated compression strength of the vertebrae compared with the control group. HE staining showed that the histomorphology of DOP vertebrae was seriously impaired, which manifested as decreased and thinned trabeculae and increased lipid droplets within trabeculae. PCR analysis demonstrated that IGF-1R mRNA expression was significantly up-regulated, and western blotting detection showed that phosphorylation levels of IGF-1R, GSK-3β, and β-catenin were enhanced in DOP rat vertebrae. Our results suggest that the IGF-1R/β-catenin signaling axis plays a role in the pathogenesis of DOP. This may contribute to development of the underlying therapeutic target for DOP.
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Affiliation(s)
- Zhi-Da Zhang
- The First Clinical School, Guangzhou University of Chinese Medicine, Guangzhou 510405, China
| | - Hui Ren
- Department of Spinal Surgery, the First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510405, China
| | - Wei-Xi Wang
- The First Clinical School, Guangzhou University of Chinese Medicine, Guangzhou 510405, China
| | - Geng-Yang Shen
- Department of Spinal Surgery, the First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510405, China
| | - Jin-Jing Huang
- The First Clinical School, Guangzhou University of Chinese Medicine, Guangzhou 510405, China
| | - Mei-Qi Zhan
- The First Clinical School, Guangzhou University of Chinese Medicine, Guangzhou 510405, China
| | - Jing-Jing Tang
- Department of Spinal Surgery, the First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510405, China
| | - Xiang Yu
- The First Clinical School, Guangzhou University of Chinese Medicine, Guangzhou 510405, China
| | - Yu-Zhuo Zhang
- School of Basic Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - De Liang
- Department of Spinal Surgery, the First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510405, China
| | - Zhi-Dong Yang
- Department of Spinal Surgery, the First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510405, China
| | - Xiao-Bing Jiang
- Department of Spinal Surgery, the First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510405, China.,Lingnan Medical Research Center of Guangzhou University of Chinese Medicine, Guangzhou 510405, China
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Tan-Chen S, Guitton J, Bourron O, Le Stunff H, Hajduch E. Sphingolipid Metabolism and Signaling in Skeletal Muscle: From Physiology to Physiopathology. Front Endocrinol (Lausanne) 2020; 11:491. [PMID: 32849282 PMCID: PMC7426366 DOI: 10.3389/fendo.2020.00491] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 06/22/2020] [Indexed: 12/14/2022] Open
Abstract
Sphingolipids represent one of the major classes of eukaryotic lipids. They play an essential structural role, especially in cell membranes where they also possess signaling properties and are capable of modulating multiple cell functions, such as apoptosis, cell proliferation, differentiation, and inflammation. Many sphingolipid derivatives, such as ceramide, sphingosine-1-phosphate, and ganglioside, have been shown to play many crucial roles in muscle under physiological and pathological conditions. This review will summarize our knowledge of sphingolipids and their effects on muscle fate, highlighting the role of this class of lipids in modulating muscle cell differentiation, regeneration, aging, response to insulin, and contraction. We show that modulating sphingolipid metabolism may be a novel and interesting way for preventing and/or treating several muscle-related diseases.
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Affiliation(s)
- Sophie Tan-Chen
- Centre de Recherche des Cordeliers, INSERM, Sorbonne Université, Université de Paris, Paris, France
- Institut Hospitalo-Universitaire ICAN, Paris, France
| | - Jeanne Guitton
- Université Saclay, CNRS UMR 9197, Institut des Neurosciences Paris-Saclay, Orsay, France
| | - Olivier Bourron
- Centre de Recherche des Cordeliers, INSERM, Sorbonne Université, Université de Paris, Paris, France
- Institut Hospitalo-Universitaire ICAN, Paris, France
- Assistance Publique-Hôpitaux de Paris, Département de Diabétologie et Maladies Métaboliques, Hôpital Pitié-Salpêtrière, Paris, France
| | - Hervé Le Stunff
- Université Saclay, CNRS UMR 9197, Institut des Neurosciences Paris-Saclay, Orsay, France
| | - Eric Hajduch
- Centre de Recherche des Cordeliers, INSERM, Sorbonne Université, Université de Paris, Paris, France
- Institut Hospitalo-Universitaire ICAN, Paris, France
- *Correspondence: Eric Hajduch
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Chew WS, Torta F, Ji S, Choi H, Begum H, Sim X, Khoo CM, Khoo EYH, Ong WY, Van Dam RM, Wenk MR, Tai ES, Herr DR. Large-scale lipidomics identifies associations between plasma sphingolipids and T2DM incidence. JCI Insight 2019; 5:126925. [PMID: 31162145 PMCID: PMC6629294 DOI: 10.1172/jci.insight.126925] [Citation(s) in RCA: 86] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 05/28/2019] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Sphingolipids (SPs) are ubiquitous, structurally diverse molecules that include ceramides, sphingomyelins, and sphingosines. They are involved in various pathologies including obesity and type 2 diabetes mellitus (T2DM). Therefore, it is likely that perturbations in plasma concentrations of SPs are associated with disease. Identifying these associations may reveal useful biomarkers or provide insight into disease processes. METHODS We performed a lipidomics evaluation of molecularly-distinct SPs in the plasma of 2,302 ethnically-Chinese Singaporeans using electrospray ionization mass spectrometry coupled with liquid chromatography. SP profiles were compared to clinical and biochemical characteristics, and subjects were evaluated by follow-up visits for 11 years. RESULTS We found that ceramides correlate positively but hexosylceramides correlate negatively with body mass index (BMI) and homeostatic model assessment of insulin resistance (HOMA-IR). Furthermore, SPs with a d16:1 sphingoid backbone correlate more positively with BMI and HOMA-IR, while d18:2 SPs correlate less positively, relative to canonical d18:1 SPs. We also found that higher concentrations of two distinct sphingomyelins were associated with a higher risk of T2DM (HR 1.45, 95% CI 1.18-1.78 for SM d16:1/C18:0; and HR 1.40, 95% CI 1.17-1.68 for SM d18:1/C18:0). CONCLUSION We identified significant associations between SPs and obesity/T2DM characteristics, specifically, that of hexosylceramides, d16:1 SPs, and d18:2 SPs. This suggests that the balance of SP metabolism, rather than ceramide accumulation, is associated with the pathology of obesity. We further identified two specific SPs that may represent prognostic biomarkers for T2DM. FUNDING Funding sources are listed in the Acknowledgements section.
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Affiliation(s)
| | - Federico Torta
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Singapore Lipidomics Incubator, Life Sciences Institute, National University of Singapore, Singapore
| | - Shanshan Ji
- Singapore Lipidomics Incubator, Life Sciences Institute, National University of Singapore, Singapore
| | - Hyungwon Choi
- Saw Swee Hock School of Public Health, National University of Singapore, Singapore
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore and National Health System, Singapore
- Institute of Molecular and Cell Biology, Agency for Science, Technology, and Research, Singapore
| | - Husna Begum
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Singapore Lipidomics Incubator, Life Sciences Institute, National University of Singapore, Singapore
| | - Xueling Sim
- Saw Swee Hock School of Public Health, National University of Singapore, Singapore
| | - Chin Meng Khoo
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore and National Health System, Singapore
| | - Eric Yin Hao Khoo
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore and National Health System, Singapore
| | - Wei-Yi Ong
- Department of Anatomy, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Rob M. Van Dam
- Saw Swee Hock School of Public Health, National University of Singapore, Singapore
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore and National Health System, Singapore
| | - Markus R. Wenk
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Singapore Lipidomics Incubator, Life Sciences Institute, National University of Singapore, Singapore
| | - E. Shyong Tai
- Saw Swee Hock School of Public Health, National University of Singapore, Singapore
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore and National Health System, Singapore
- Duke-NUS Graduate Medical School, Singapore
| | - Deron R. Herr
- Department of Pharmacology and
- Department of Biology, San Diego State University, San Diego, California, USA
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Abstract
Liquid chromatography-mass spectrometry (LC-MS) is a widely used methodology for measuring lipids at a global level. Combined with an optimal extraction method LC-MS enables the detection and characterization of a wide range of lipid species even of low abundance. Here, we describe two extraction- and LC-MS-based quantitative analytical methods for lipid, acyl-CoA, and acyl-carnitine analyses from either mouse C2C12 myotubes or mouse skeletal tissue. We also describe the use of 13C16-palmitate and its incorporation into acyl-carnitines to show how stable isotope tracers are metabolized within cells and therefore can be implemented for lipidomic flux analysis.
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