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Kurooka N, Eguchi J, Wada J. Role of glycosylphosphatidylinositol-anchored high-density lipoprotein binding protein 1 in hypertriglyceridemia and diabetes. J Diabetes Investig 2023; 14:1148-1156. [PMID: 37448184 PMCID: PMC10512915 DOI: 10.1111/jdi.14056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 06/25/2023] [Accepted: 06/28/2023] [Indexed: 07/15/2023] Open
Abstract
In diabetes, the impairment of insulin secretion and insulin resistance contribute to hypertriglyceridemia, as the enzymatic activity of lipoprotein lipase (LPL) depends on insulin action. The transport of LPL to endothelial cells and its enzymatic activity are maintained by the formation of lipolytic complex depending on the multiple positive (glycosylphosphatidylinositol-anchored high-density lipoprotein binding protein 1 [GPIHBP1], apolipoprotein C-II [APOC2], APOA5, heparan sulfate proteoglycan [HSPG], lipase maturation factor 1 [LFM1] and sel-1 suppressor of lin-12-like [SEL1L]) and negative regulators (APOC1, APOC3, angiopoietin-like proteins [ANGPTL]3, ANGPTL4 and ANGPTL8). Among the regulators, GPIHBP1 is a crucial molecule for the translocation of LPL from parenchymal cells to the luminal surface of capillary endothelial cells, and maintenance of lipolytic activity; that is, hydrolyzation of triglyceride into free fatty acids and monoglyceride, and conversion from chylomicron to chylomicron remnant in the exogenous pathway and from very low-density lipoprotein to low-density lipoprotein in the endogenous pathway. The null mutation of GPIHBP1 causes severe hypertriglyceridemia and pancreatitis, and GPIGBP1 autoantibody syndrome also causes severe hypertriglyceridemia and recurrent episodes of acute pancreatitis. In patients with type 2 diabetes, the elevated serum triglyceride levels negatively correlate with circulating LPL levels, and positively with circulating APOC1, APOC3, ANGPTL3, ANGPTL4 and ANGPTL8 levels. In contrast, circulating GPIHBP1 levels are not altered in type 2 diabetes patients with higher serum triglyceride levels, whereas they are elevated in type 2 diabetes patients with diabetic retinopathy and nephropathy. The circulating regulators of lipolytic complex might be new biomarkers for lipid and glucose metabolism, and diabetic vascular complications.
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Affiliation(s)
- Naoko Kurooka
- Department of Nephrology, Rheumatology, Endocrinology and Metabolism, Faculty of Medicine, Dentistry and Pharmaceutical SciencesOkayama UniversityOkayamaJapan
| | - Jun Eguchi
- Department of Nephrology, Rheumatology, Endocrinology and Metabolism, Faculty of Medicine, Dentistry and Pharmaceutical SciencesOkayama UniversityOkayamaJapan
| | - Jun Wada
- Department of Nephrology, Rheumatology, Endocrinology and Metabolism, Faculty of Medicine, Dentistry and Pharmaceutical SciencesOkayama UniversityOkayamaJapan
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Hsu CC, Kanter JE, Kothari V, Bornfeldt KE. Quartet of APOCs and the Different Roles They Play in Diabetes. Arterioscler Thromb Vasc Biol 2023; 43:1124-1133. [PMID: 37226733 PMCID: PMC10330679 DOI: 10.1161/atvbaha.122.318290] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Accepted: 05/10/2023] [Indexed: 05/26/2023]
Abstract
APOA1 and APOB are the structural proteins of high-density lipoprotein and APOB-containing lipoproteins, such as low-density lipoprotein and very low-density lipoprotein, respectively. The 4 smaller APOCs (APOC1, APOC2, APOC3, and APOC4) are exchangeable apolipoproteins; they are readily transferred among high-density lipoproteins and APOB-containing lipoproteins. The APOCs regulate plasma triglyceride and cholesterol levels by modulating substrate availability and activities of enzymes interacting with lipoproteins and by interfering with APOB-containing lipoprotein uptake through hepatic receptors. Of the 4 APOCs, APOC3 has been best studied in relation to diabetes. Elevated serum APOC3 levels predict incident cardiovascular disease and progression of kidney disease in people with type 1 diabetes. Insulin suppresses APOC3 levels, and accordingly, elevated APOC3 levels associate with insulin deficiency and insulin resistance. Mechanistic studies in a mouse model of type 1 diabetes have demonstrated that APOC3 acts in the causal pathway of diabetes-accelerated atherosclerosis. The mechanism is likely due to the ability of APOC3 to slow the clearance of triglyceride-rich lipoproteins and their remnants, thereby causing an increased accumulation of atherogenic lipoprotein remnants in lesions of atherosclerosis. Less is known about the roles of APOC1, APOC2, and APOC4 in diabetes.
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Affiliation(s)
- Cheng-Chieh Hsu
- Division of Metabolism, Endocrinology and Nutrition, University of Washington Medicine Diabetes Institute, Department of Medicine, University of Washington, Seattle, WA 98109, USA
| | - Jenny E. Kanter
- Division of Metabolism, Endocrinology and Nutrition, University of Washington Medicine Diabetes Institute, Department of Medicine, University of Washington, Seattle, WA 98109, USA
| | - Vishal Kothari
- Division of Metabolism, Endocrinology and Nutrition, University of Washington Medicine Diabetes Institute, Department of Medicine, University of Washington, Seattle, WA 98109, USA
| | - Karin E. Bornfeldt
- Division of Metabolism, Endocrinology and Nutrition, University of Washington Medicine Diabetes Institute, Department of Medicine, University of Washington, Seattle, WA 98109, USA
- Department of Laboratory Medicine and Pathology, University of Washington Medicine Diabetes Institute, University of Washington, Seattle, WA 98109, USA
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Yu K, Ding L, An X, Yang Y, Zhang X, Li L, Wang C, Bai F, Yang X. APOC1 exacerbates renal fibrosis through the activation of the NF-κB signaling pathway in IgAN. Front Pharmacol 2023; 14:1181435. [PMID: 37305534 PMCID: PMC10248024 DOI: 10.3389/fphar.2023.1181435] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 05/02/2023] [Indexed: 06/13/2023] Open
Abstract
Introduction: IgA nephropathy (IgAN) is the most common disease leading to end-stage renal disease, and tubular fibrosis represents an important risk factor for disease progression. However, research on early molecular diagnostic indicators of tubular fibrosis and the mechanisms underlying disease progression is still lacking. Methods: The GSE93798 dataset was downloaded from the GEO database. DEGs were screened and analyzed for GO and KEGG enrichment in IgAN. The least absolute shrinkage and selection operator (LASSO) and support vector machine recursive feature elimination (SVM-RFE) algorithms were applied to screen for hub secretory genes. The expression and diagnostic efficacy of hub genes were confirmed by the GSE35487 dataset. ELISA was applied to detect the expression of APOC1 in serum. The expression and localization of hub genes in IgAN were verified by the expression of IHC and IF in human kidney tissues, and the correlation of expression with clinical data was verified in the Nephroseq database. Finally, cellular experiments clarified the role of hub genes in the signaling pathway. Results: A total of 339 DEGs were identified in IgAN, of which 237 were upregulated and 102 downregulated. The KEGG signaling pathway is enriched in the ECM-receptor interaction and AGE-RAGE signaling pathway. APOC1, ALB, CCL8, CXCL2, SRPX2, and TGFBI identified six hub secretory genes using the LASSO and SVM-RFE algorithms. In vivo and in vitro experiments demonstrated that APOC1 expression was elevated in IgAN. The serum concentration of APOC1 was 1.232 ± 0.1812 μg/ml in IgAN patients, whereas it was 0.3956 ± 0.1233 μg/ml in healthy individuals. APOC1 exhibited high diagnostic efficacy for IgAN (AUC of 99.091%, specificity of 95.455%, and sensitivity of 99.141%) in the GSE93798 dataset. APOC1 expression negatively correlated with eGFR (R 2 = 0.2285, p = 0.0385) and positively correlated with serum creatinine (R 2 = 0.41, p = 0.000567) in IgAN. APOC1 exacerbated renal fibrosis, possibly in part by activating the NF-κB pathway in IgAN. Conclusion: APOC1 was identified as the core secretory gene of IgAN, which was closely associated with blood creatinine and eGFR and had significant efficacy in the diagnosis of IgAN. Mechanistic studies revealed that the knockdown of APOC1 could improve IgAN renal fibrosis by inhibiting the NF pathway, which may be a potential therapeutic target for improving renal fibrosis in IgAN.
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Affiliation(s)
- Kuipeng Yu
- Department of Nephrology, Qilu Hospital of Shandong University, Jinan, Shandong, China
- Department of Blood Purification, Qilu Hospital of Shandong University, Jinan, Shandong, China
- Laboratory of Basic Medical Sciences, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Lin Ding
- Department of Nephrology, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Xin An
- Department of Nephrology, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Yanjiang Yang
- Department of Nephrology, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Xiaoning Zhang
- Department of Nephrology, Shengli Oilfield Central Hospital, Dongying, Shandong, China
| | - Luyao Li
- Department of Nephrology, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Chunjie Wang
- Department of Nephrology, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Fang Bai
- Department of Nephrology, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Xiangdong Yang
- Department of Nephrology, Qilu Hospital of Shandong University, Jinan, Shandong, China
- Department of Blood Purification, Qilu Hospital of Shandong University, Jinan, Shandong, China
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Rouland A, Masson D, Lagrost L, Vergès B, Gautier T, Bouillet B. Role of apolipoprotein C1 in lipoprotein metabolism, atherosclerosis and diabetes: a systematic review. Cardiovasc Diabetol 2022; 21:272. [PMID: 36471375 PMCID: PMC9724408 DOI: 10.1186/s12933-022-01703-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 11/21/2022] [Indexed: 12/12/2022] Open
Abstract
Apolipoprotein C1 (apoC1) is a small size apolipoprotein whose exact role is not totally clarified but which seems to modulate significantly the metabolism of lipoproteins. ApoC1 is involved in the metabolism of triglyceride-rich lipoproteins by inhibiting the binding of very low density lipoproteins (VLDL) to VLDL-receptor (VLDL-R), to low density lipoprotein receptor (LDL-R) and to LDL receptor related protein (LRP), by reducing the activity of lipoprotein lipase (LPL) and by stimulating VLDL production, all these effects leading to increase plasma triglycerides. ApoC1 takes also part in the metabolism of high density lipoproteins (HDL) by inhibiting Cholesterol Ester Transfer Protein (CETP). The functionality of apoC1 on CETP activity is impaired in diabetes that might account, at least in part, for the increased plasma CETP activity observed in patients with diabetes. Its different effects on lipoprotein metabolism with a possible role in the modulation of inflammation makes the net impact of apoC1 on cardiometabolic risk difficult to figure out and apoC1 might be considered as pro-atherogenic or anti-atherogenic depending on the overall metabolic context. Making the link between total plasma apoC1 levels and the risk of cardio-metabolic diseases is difficult due to the high exchangeability of this small protein whose biological effects might depend essentially on its association with VLDL or HDL. The role of apoC1 in humans is not entirely elucidated and further studies are needed to determine its precise role in lipid metabolism and its possible pleiotropic effects on inflammation and vascular wall biology. In this review, we will present data on apoC1 structure and distribution among lipoproteins, on the effects of apoC1 on VLDL metabolism and HDL metabolism and we will discuss the possible links between apoC1, atherosclerosis and diabetes.
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Affiliation(s)
- Alexia Rouland
- grid.31151.37Endocrinology and Diabetology Unit, University Hospital, Dijon, France ,grid.493090.70000 0004 4910 6615INSERM/University of Bourgogne Franche-Comté, LNC UMR1231, Dijon, France
| | - David Masson
- grid.493090.70000 0004 4910 6615INSERM/University of Bourgogne Franche-Comté, LNC UMR1231, Dijon, France ,LipSTIC LabEx, UFR Sciences de Santé, Dijon, France
| | - Laurent Lagrost
- grid.493090.70000 0004 4910 6615INSERM/University of Bourgogne Franche-Comté, LNC UMR1231, Dijon, France ,LipSTIC LabEx, UFR Sciences de Santé, Dijon, France
| | - Bruno Vergès
- grid.31151.37Endocrinology and Diabetology Unit, University Hospital, Dijon, France ,grid.493090.70000 0004 4910 6615INSERM/University of Bourgogne Franche-Comté, LNC UMR1231, Dijon, France
| | - Thomas Gautier
- grid.493090.70000 0004 4910 6615INSERM/University of Bourgogne Franche-Comté, LNC UMR1231, Dijon, France ,LipSTIC LabEx, UFR Sciences de Santé, Dijon, France
| | - Benjamin Bouillet
- grid.31151.37Endocrinology and Diabetology Unit, University Hospital, Dijon, France ,grid.493090.70000 0004 4910 6615INSERM/University of Bourgogne Franche-Comté, LNC UMR1231, Dijon, France ,grid.31151.37Service Endocrinologie, Diabétologie et Maladies Métaboliques, Hôpital François Mitterrand, CHU Dijon, BP 77908, 21079 Dijon, France
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Ghiam S, Eslahchi C, Shahpasand K, Habibi-Rezaei M, Gharaghani S. Exploring the role of non-coding RNAs as potential candidate biomarkers in the cross-talk between diabetes mellitus and Alzheimer’s disease. Front Aging Neurosci 2022; 14:955461. [PMID: 36092798 PMCID: PMC9451601 DOI: 10.3389/fnagi.2022.955461] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Accepted: 08/04/2022] [Indexed: 11/17/2022] Open
Abstract
Background Recent research has investigated the connection between Diabetes Mellitus (DM) and Alzheimer’s Disease (AD). Insulin resistance plays a crucial role in this interaction. Studies have focused on dysregulated proteins to disrupt this connection. Non-coding RNAs (ncRNAs), on the other hand, play an important role in the development of many diseases. They encode the majority of the human genome and regulate gene expression through a variety of mechanisms. Consequently, identifying significant ncRNAs and utilizing them as biomarkers could facilitate the early detection of this cross-talk. On the other hand, computational-based methods may help to understand the possible relationships between different molecules and conduct future wet laboratory experiments. Materials and methods In this study, we retrieved Genome-Wide Association Study (GWAS, 2008) results from the United Kingdom Biobank database using the keywords “Alzheimer’s” and “Diabetes Mellitus.” After excluding low confidence variants, statistical analysis was performed, and adjusted p-values were determined. Using the Linkage Disequilibrium method, 127 significant shared Single Nucleotide Polymorphism (SNP) were chosen and the SNP-SNP interaction network was built. From this network, dense subgraphs were extracted as signatures. By mapping each signature to the reference genome, genes associated with the selected SNPs were retrieved. Then, protein-microRNA (miRNA) and miRNA-long non-coding RNA (lncRNA) bipartite networks were built and significant ncRNAs were extracted. After the validation process, by applying the scoring function, the final protein-miRNA-lncRNA tripartite network was constructed, and significant miRNAs and lncRNAs were identified. Results Hsa-miR-199a-5p, hsa-miR-199b-5p, hsa-miR-423-5p, and hsa-miR-3184-5p, the four most significant miRNAs, as well as NEAT1, XIST, and KCNQ1OT1, the three most important lncRNAs, and their interacting proteins in the final tripartite network, have been proposed as new candidate biomarkers in the cross-talk between DM and AD. The literature review also validates the obtained ncRNAs. In addition, miRNA/lncRNA pairs; hsa-miR-124-3p/KCNQ1OT1, hsa-miR-124-3p/NEAT1, and hsa-miR-124-3p/XIST, all expressed in the brain, and their interacting proteins in our final network are suggested for future research investigation. Conclusion This study identified 127 shared SNPs, 7 proteins, 15 miRNAs, and 11 lncRNAs involved in the cross-talk between DM and AD. Different network analysis and scoring function suggested the most significant miRNAs and lncRNAs as potential candidate biomarkers for wet laboratory experiments. Considering these candidate biomarkers may help in the early detection of DM and AD co-occurrence.
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Affiliation(s)
- Shokoofeh Ghiam
- Laboratory of Bioinformatics and Drug Design, Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Changiz Eslahchi
- Department of Computer and Data Sciences, Faculty of Mathematical Sciences, Shahid-Beheshti University, Tehran, Iran
- School of Biological Sciences, Institute for Research in Fundamental Sciences (IPM), Tehran, Iran
- Changiz Eslahchi,
| | - Koorosh Shahpasand
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology (RI-SCBT), Tehran, Iran
| | - Mehran Habibi-Rezaei
- Department of Cell and Molecular Biology, School of Biology, College of Science, University of Tehran, Tehran, Iran
| | - Sajjad Gharaghani
- Laboratory of Bioinformatics and Drug Design, Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
- *Correspondence: Sajjad Gharaghani,
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Mu X, Qi S, Wang H, Yuan L, Wang C, Li Y, Qiu J. Bisphenol analogues induced metabolic effects through eliciting intestinal cell heterogeneous response. ENVIRONMENT INTERNATIONAL 2022; 165:107287. [PMID: 35598417 DOI: 10.1016/j.envint.2022.107287] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 04/26/2022] [Accepted: 05/05/2022] [Indexed: 06/15/2023]
Abstract
The metabolic effects of endocrine-disrupting chemicals, such as bisphenol analogues, have drawn increasing attention. Bisphenol A (BPA) usage is associated with the occurrence of many metabolic diseases. With the restricted use of BPA, alternatives like bisphenol F (BPF) and bisphenol AF (BPAF) have been greatly introduced for industrial manufacture, and brings new hazard to public health. To understand how bisphenol analogues induced metabolic effects, zebrafish are continuous exposed to environmental level (0.5 μg/L) of BPA, BPF and BPAF since embryonic stage, and identified hepatic steatosis and insulin resistance at 60-day post fertilization. Hepatic transcriptional profile indicated that pancreatic disease pathways were activated by BPA, but were inhibited by BPF. At the same time, increased lipid secretion and gluconeogenesis pathways in zebrafish liver was found post BPAF exposure. Significant inflammatory response, histological injury and increased mucus secretion was detected in zebrafish intestine post exposure of three bisphenol analogues. Single-cell RNA sequencing of zebrafish intestinal cells revealed activation of lipid uptake and absorption pathways in enterocyte lineages, which well explained the hepatic steatosis induced by BPA and BPF. Besides, genes related to carbohydrate metabolism, diabetes and insulin resistance were activated in intestinal immune cell types by three bisphenol analogues. These findings indicated that BPA and its alternatives could lead to abnormal lipid and carbohydrate metabolism of zebrafish through inducing cell heterogeneous changes in gut, and revealed both molecular and cellular mechanism in mediating this effect.
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Affiliation(s)
- Xiyan Mu
- Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing, People's Republic of China; Fishery Resource and Environment Research Center, Chinese Academy of Fishery Sciences, Beijing, People's Republic of China.
| | - Suzhen Qi
- Institute of Apicultural Research, Chinese Academy of Agricultural Sciences, Beijing, People's Republic of China
| | - Hui Wang
- Fishery Resource and Environment Research Center, Chinese Academy of Fishery Sciences, Beijing, People's Republic of China
| | - Lilai Yuan
- Fishery Resource and Environment Research Center, Chinese Academy of Fishery Sciences, Beijing, People's Republic of China
| | - Chengju Wang
- College of Sciences, China Agricultural University, Beijing, People's Republic of China
| | - Yingren Li
- Fishery Resource and Environment Research Center, Chinese Academy of Fishery Sciences, Beijing, People's Republic of China
| | - Jing Qiu
- Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing, People's Republic of China.
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Chen D, Wu H, Wang X, Huang T, Jia J. Shared Genetic Basis and Causal Relationship Between Television Watching, Breakfast Skipping and Type 2 Diabetes: Evidence From a Comprehensive Genetic Analysis. Front Endocrinol (Lausanne) 2022; 13:836023. [PMID: 35399945 PMCID: PMC8988136 DOI: 10.3389/fendo.2022.836023] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 03/01/2022] [Indexed: 11/13/2022] Open
Abstract
Background Epidemiological investigations have established unhealthy lifestyles, such as excessive leisurely sedentary behavior (especially TV/television watching) and breakfast skipping, increase the risk of type 2 diabetes (T2D), but the causal relationship is unclear. We aimed to understand how single nucleotide variants contribute to the co-occurrence of unhealthy lifestyles and T2D, thereby providing meaningful insights into disease mechanisms. Methods Combining summary statistics from genome-wide association studies (GWAS) on TV watching (N = 422218), breakfast skipping (N = 193860) and T2D (N = 159208) in European pedigrees, we conducted comprehensive pairwise genetic analysis, including high-definition likelihood (HDL-method), cross-phenotype association studies (CPASSOC), GWAS-eQTL colocalization analysis and transcriptome-wide association studies (TWAS), to understand the genetic overlap between them. We also performed bidirectional two-sample Mendelian randomization (MR) analysis for causal inference using genetic instrumental variables, and two-step MR mediation analysis was used to assess any effects explained by body mass index, lipid traits and glycemic traits. Results HDL-method showed that T2D shared a strong genetic correlation with TV watching (rg = 0.26; P = 1.63×10-29) and skipping breakfast (rg = 0.15; P =2.02×10-6). CPASSOC identifies eight independent SNPs shared between T2D and TV watching, including one novel shared locus. TWAS and CPASSOC showed that shared genes were enriched in lung, esophageal, adipose, and thyroid tissues and highlighted potential shared regulatory pathways for lipoprotein metabolism, pancreatic β-cell function, cellular senescence and multi-mediator factors. MR showed TV watching had a causal effect on T2D (βIVW = 0.629, PIVW = 1.80×10-10), but no significant results were observed between breakfast skipping and T2D. Mediation analysis provided evidence that body mass index, fasting glucose, hemoglobin A1c and high-density lipoprotein are potential factors that mediate the causal relationship between TV and T2D. Conclusions Our findings provide strong evidence of shared genetics and causation between TV watching and T2D and facilitate our identification of common genetic architectures shared between them.
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Affiliation(s)
- Dongze Chen
- Department of Biostatistics, School of Public Health, Peking University, Beijing, China
| | - Hanyu Wu
- Department of Bioinformatics, School of Life Science, Peking University, Beijing, China
| | - Xinpei Wang
- Department of Biostatistics, School of Public Health, Peking University, Beijing, China
| | - Tao Huang
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, China
- Key Laboratory of Molecular Cardiovascular Sciences (Peking University), Ministry of Education, Beijing, China
| | - Jinzhu Jia
- Department of Biostatistics, School of Public Health, Peking University, Beijing, China
- Center for Statistical Science, Peking University, Beijing, China
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Wang HJ, Ma YX, Wang AH, Jiang YS, Jiang XZ. Expression of apolipoprotein C1 in clear cell renal cell carcinoma: An oncogenic gene and a prognostic marker. Kaohsiung J Med Sci 2020; 37:419-426. [PMID: 33305507 DOI: 10.1002/kjm2.12328] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 08/17/2020] [Accepted: 11/02/2020] [Indexed: 01/04/2023] Open
Abstract
This study aimed to explore whether APOC1 expression has a function in the biological behavior of clear cell renal cell carcinoma (ccRCC) cells and its possible mechanism. Bioinformatics analysis of data TCGA and OnComine was conducted to explore the expression pattern and prognostic value of APOC1, as well as the relationship between APOC1 expression and clinical indicators. Loss- and gain- of APOC1 function assays were carried out to assess the biological functions of APOC1. Western blotting was applied to detect protein expression. We revealed that APOC1 was upregulated in ccRCC tissues. APOC1 expression was related to gender, grade, pathologic-T, pathologic-stage, and pathologic-M in patients with ccRCC. Meanwhile, Kaplan-Meier analysis evidenced that the high APOC1 expression indicated unfavorable outcomes of ccRCC. Functional experiments in vitro revealed that upregulation of APOC1 in UT33A cells promoted cell proliferation, invasion, and migration, while downregulation of APOC1 in 786-O cells had the opposite effect. Furthermore, epithelial mesenchymal transition (EMT) was activated in cells with upregulated APOC1 but inhibited in cells with down-regulated APOC1. Collectively, our data suggested that APOC1 was overexpressed in ccRCC cells and promoted the malignant biological behaviors and EMT of ccRCC cells.
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Affiliation(s)
- Hai-Jun Wang
- Department of Urology, Qilu Hospital,Cheeloo College of Medicine, Shandong University, Jinan, China.,Department of Urology Surgery, Anqiu Hospital of Chinese Traditional Medicine, Anqiu, China
| | - Yong-Xiang Ma
- Department of Urology Surgery, Anqiu Hospital of Chinese Traditional Medicine, Anqiu, China
| | - Ai-Hua Wang
- Department of Urology Surgery, Anqiu Hospital of Chinese Traditional Medicine, Anqiu, China
| | - Yuan-Shun Jiang
- Department of Urology Surgery, Anqiu Hospital of Chinese Traditional Medicine, Anqiu, China
| | - Xian-Zhou Jiang
- Department of Urology, Qilu Hospital,Cheeloo College of Medicine, Shandong University, Jinan, China
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ApoC1 promotes the metastasis of clear cell renal cell carcinoma via activation of STAT3. Oncogene 2020; 39:6203-6217. [PMID: 32826950 DOI: 10.1038/s41388-020-01428-3] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Revised: 08/05/2020] [Accepted: 08/10/2020] [Indexed: 12/19/2022]
Abstract
Clear cell renal cell carcinoma (ccRCC) is the most common renal cancer and frequently diagnosed at an advanced stage. It is prone to develop unpredictable metastases even with proper treatment. Antiangiogenic therapy is the most effective medical treatment for metastatic ccRCC. Thus, exploration of novel approaches to inhibit angiogenesis and metastasis may potentially lead to a better therapeutic option for ccRCC. Among all the types of cancer, renal cancer samples exhibited the maximum upregulation of ApoC1 as referred to in the Oncomine database. The expression of ApoC1 was increased accompanied by ccRCC progression. A high level of ApoC1 was closely related to poor survival time in ccRCC patients. Furthermore, ApoC1 was over-expressed in the highly invasive ccRCC cells as compared to that in the low-invasive ccRCC cells. Besides, ApoC1 promoted metastasis of ccRCC cells via EMT pathway, whereas depletion of ApoC1 alleviated these effects. ApoC1 as a novel pro-metastatic factor facilitates the activation of STAT3 and enhances the metastasis of ccRCC cells. Meanwhile, ApoC1 in the exosomes were transferred from the ccRCC cells to the vascular endothelial cells and promoted metastasis of the ccRCC cells via activating STAT3. Finally, the metastatic potential of the ccRCC cells driven by ApoC1 was suppressed by DPP-4 inhibition. Our study not only identifies a novel ApoC1-STAT3 pathway in ccRCC metastasis but also provides direction for the exploration of novel strategies to predict and treat metastatic ccRCC in the future.
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Fuior EV, Gafencu AV. Apolipoprotein C1: Its Pleiotropic Effects in Lipid Metabolism and Beyond. Int J Mol Sci 2019; 20:ijms20235939. [PMID: 31779116 PMCID: PMC6928722 DOI: 10.3390/ijms20235939] [Citation(s) in RCA: 94] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 11/19/2019] [Accepted: 11/21/2019] [Indexed: 12/20/2022] Open
Abstract
Apolipoprotein C1 (apoC1), the smallest of all apolipoproteins, participates in lipid transport and metabolism. In humans, APOC1 gene is in linkage disequilibrium with APOE gene on chromosome 19, a proximity that spurred its investigation. Apolipoprotein C1 associates with triglyceride-rich lipoproteins and HDL and exchanges between lipoprotein classes. These interactions occur via amphipathic helix motifs, as demonstrated by biophysical studies on the wild-type polypeptide and representative mutants. Apolipoprotein C1 acts on lipoprotein receptors by inhibiting binding mediated by apolipoprotein E, and modulating the activities of several enzymes. Thus, apoC1 downregulates lipoprotein lipase, hepatic lipase, phospholipase A2, cholesterylester transfer protein, and activates lecithin-cholesterol acyl transferase. By controlling the plasma levels of lipids, apoC1 relates directly to cardiovascular physiology, but its activity extends beyond, to inflammation and immunity, sepsis, diabetes, cancer, viral infectivity, and-not last-to cognition. Such correlations were established based on studies using transgenic mice, associated in the recent years with GWAS, transcriptomic and proteomic analyses. The presence of a duplicate gene, pseudogene APOC1P, stimulated evolutionary studies and more recently, the regulatory properties of the corresponding non-coding RNA are steadily emerging. Nonetheless, this prototypical apolipoprotein is still underexplored and deserves further research for understanding its physiology and exploiting its therapeutic potential.
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Affiliation(s)
- Elena V. Fuior
- Institute of Cellular Biology and Pathology “N. Simionescu”, 050568 Bucharest, Romania;
| | - Anca V. Gafencu
- Institute of Cellular Biology and Pathology “N. Simionescu”, 050568 Bucharest, Romania;
- Correspondence:
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11
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Bouillet B, Gautier T, Rouland A, Duvillard L, Petit JM, Lagrost L, Vergès B. Plasma apolipoprotein C1 concentration is associated with plasma triglyceride concentration but not with visceral fat and liver fat content in people with type 1 diabetes. Acta Diabetol 2019; 56:1155-1157. [PMID: 31119457 DOI: 10.1007/s00592-019-01367-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Accepted: 05/08/2019] [Indexed: 11/25/2022]
Affiliation(s)
- Benjamin Bouillet
- Endocrinology, Diabetology Department, University Hospital of Dijon, 2 Boulevard du Maréchal de Lattre de Tassigny, BP 77908, 21079, Dijon, France.
- INSERM LNC-UMR 1231, University of Bourgogne, Dijon, France.
| | - Thomas Gautier
- INSERM LNC-UMR 1231, University of Bourgogne, Dijon, France
| | - Alexia Rouland
- Endocrinology, Diabetology Department, University Hospital of Dijon, 2 Boulevard du Maréchal de Lattre de Tassigny, BP 77908, 21079, Dijon, France
- INSERM LNC-UMR 1231, University of Bourgogne, Dijon, France
| | | | - Jean-Michel Petit
- Endocrinology, Diabetology Department, University Hospital of Dijon, 2 Boulevard du Maréchal de Lattre de Tassigny, BP 77908, 21079, Dijon, France
- INSERM LNC-UMR 1231, University of Bourgogne, Dijon, France
| | | | - Bruno Vergès
- Endocrinology, Diabetology Department, University Hospital of Dijon, 2 Boulevard du Maréchal de Lattre de Tassigny, BP 77908, 21079, Dijon, France
- INSERM LNC-UMR 1231, University of Bourgogne, Dijon, France
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McPherson A, Larson SB. The structure of human apolipoprotein C-1 in four different crystal forms. J Lipid Res 2018; 60:400-411. [PMID: 30559175 PMCID: PMC6358290 DOI: 10.1194/jlr.m089441] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2018] [Revised: 11/28/2018] [Indexed: 02/02/2023] Open
Abstract
Human apolipoprotein C1 (APOC1) is a 57 amino acid long polypeptide that, through its potent inhibition of cholesteryl ester transferase protein, helps regulate the transfer of lipids between lipid particles. We have now determined the structure of APOC1 in four crystal forms by X-ray diffraction. A molecule of APOC1 is a single, slightly bent, α-helix having 13–14 turns and a length of about 80 Å. APOC1 exists as a dimer, but the dimers are not the same in the four crystals. In two monoclinic crystals, two helices closely engage one another in an antiparallel fashion. The interactions between monomers are almost entirely hydrophobic with sparse electrostatic complements. In the third monoclinic crystal, the two monomers spread at one end of the dimer, like a scissor opening, and, by translation along the crystallographic a axis, form a continuous, contiguous sheet through the crystal. In the orthorhombic crystals, two molecules of APOC1 are related by a noncrystallographic 2-fold axis to create an arc of about 120 Å length. This symmetrical dimer utilizes interactions not present in dimers of the monoclinic crystals. Versatility of APOC1 monomer association shown by these crystals is suggestive of physiological function.
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Affiliation(s)
- Alexander McPherson
- Department of Molecular Biology and Biochemistry, University of California, Irvine, CA 92697-3900
| | - Steven B Larson
- Department of Molecular Biology and Biochemistry, University of California, Irvine, CA 92697-3900
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Bus P, Pierneef L, Bor R, Wolterbeek R, van Es LA, Rensen PC, de Heer E, Havekes LM, Bruijn JA, Berbée JF, Baelde HJ. Apolipoprotein C-I plays a role in the pathogenesis of glomerulosclerosis. J Pathol 2017; 241:589-599. [PMID: 27976371 DOI: 10.1002/path.4859] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Revised: 10/27/2016] [Accepted: 11/29/2016] [Indexed: 12/22/2022]
Abstract
Diabetic nephropathy is the leading cause of end-stage renal disease. Diabetic patients have increased plasma concentrations of apolipoprotein C-I (apoCI), and meta-analyses found that a polymorphism in APOC1 is associated with an increased risk of developing nephropathy. To investigate whether overexpressing apoCI contributes to the development of kidney damage, we studied renal tissue and peritoneal macrophages from APOC1 transgenic (APOC1-tg) mice and wild-type littermates. In addition, we examined renal material from autopsied diabetic patients with and without diabetic nephropathy and from autopsied control subjects. We found that APOC1-tg mice, but not wild-type mice, develop albuminuria, renal dysfunction, and glomerulosclerosis with increased numbers of glomerular M1 macrophages. Moreover, compared to wild-type macrophages, stimulated macrophages isolated from APOC1-tg mice have increased cytokine expression, including TNF-alpha and TGF-beta, both of which are known to increase the production of extracellular matrix proteins in mesangial cells. These results suggest that APOC1 expression induces glomerulosclerosis, potentially by increasing the cytokine response in macrophages. Furthermore, we detected apoCI in the kidneys of diabetic patients, but not in control kidneys. Moreover, patients with diabetic nephropathy have significantly more apoCI present in glomeruli compared to diabetic patients without nephropathy, suggesting that apoCI could be involved in the development of diabetic nephropathy. ApoCI co-localized with macrophages. Therefore, apoCI is a promising new therapeutic target for patients at risk of developing nephropathy. Copyright © 2016 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
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Affiliation(s)
- Pascal Bus
- Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands
| | - Louise Pierneef
- Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands
| | - Rosalie Bor
- Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands
| | - Ron Wolterbeek
- Department of Medical Statistics and Bioinformatics, Leiden University Medical Center, Leiden, The Netherlands
| | - Leendert A van Es
- Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands
| | - Patrick Cn Rensen
- Department of Medicine, Division of Endocrinology, Leiden University Medical Center, Leiden, The Netherlands.,Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands
| | - Emile de Heer
- Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands
| | - Louis M Havekes
- Department of Medicine, Division of Endocrinology, Leiden University Medical Center, Leiden, The Netherlands.,Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands
| | - Jan A Bruijn
- Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands
| | - Jimmy F Berbée
- Department of Medicine, Division of Endocrinology, Leiden University Medical Center, Leiden, The Netherlands.,Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, The Netherlands
| | - Hans J Baelde
- Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands
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