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Li Y, Chen S, Yang Q, Liu X, Zhou W, Kang T, Wu W, Ou S. The ANGPTL4-HIF-1α loop: a critical regulator of renal interstitial fibrosis. J Transl Med 2024; 22:649. [PMID: 38992710 PMCID: PMC11241841 DOI: 10.1186/s12967-024-05466-3] [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: 12/27/2023] [Accepted: 07/03/2024] [Indexed: 07/13/2024] Open
Abstract
BACKGROUND Renal interstitial fibrosis (RIF) is a progressive, irreversible terminal kidney disease with a poor prognosis and high mortality. Angiopoietin-like 4 (ANGPTL4) is known to be associated with fibrosis in various organs, but its impact on the RIF process remains unclear. This study aimed to elucidate the role and underlying mechanisms of ANGPTL4 in the progression of RIF. METHODS In vivo, a chronic kidney disease (CKD) rat model of renal interstitial fibrosis was established via intragastric administration of adenine at different time points (4 and 6 weeks). Blood and urine samples were collected to assess renal function and 24-h urinary protein levels. Kidney tissues were subjected to HE and Masson staining for pathological observation. Immunohistochemistry and real-time quantitative PCR (qRT‒PCR) were performed to evaluate the expression of ANGPTL4 and hypoxia-inducible factor-1α (HIF-1α), followed by Pearson correlation analysis. Subsequently, kidney biopsy tissues from 11 CKD patients (6 with RIF and 5 without RIF) were subjected to immunohistochemical staining to validate the expression of ANGPTL4. In vitro, a fibrosis model of human renal tubular epithelial cells (HK2) was established through hypoxic stimulation. Subsequently, an HIF-1α inhibitor (2-MeOE2) was used, and ANGPTL4 was manipulated using siRNA or plasmid overexpression. Changes in ANGPTL4 and fibrosis markers were analyzed through Western blotting, qRT‒PCR, and immunofluorescence. RESULTS ANGPTL4 was significantly upregulated in the CKD rat model and was significantly positively correlated with renal injury markers, the fibrotic area, and HIF-1α. These results were confirmed by clinical samples, which showed a significant increase in the expression level of ANGPTL4 in CKD patients with RIF, which was positively correlated with HIF-1α. Further in vitro studies indicated that the expression of ANGPTL4 is regulated by HIF-1α, which in turn is subject to negative feedback regulation by ANGPTL4. Moreover, modulation of ANGPTL4 expression influences the progression of fibrosis in HK2 cells. CONCLUSION Our findings indicate that ANGPTL4 is a key regulatory factor in renal fibrosis, forming a loop with HIF-1α, potentially serving as a novel therapeutic target for RIF.
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Affiliation(s)
- Yan Li
- Department of Nephrology, The Affiliated Hospital of Southwest Medical University, 25 Taiping Street, Jiangyang District, Luzhou, 646000, Sichuan, China
- Sichuan Clinical Research Center for Nephrology, Luzhou, 646000, Sichuan, China
- Metabolic Vascular Disease Key Laboratory of Sichuan Province, Luzhou, 646000, Sichuan, China
| | - Shuang Chen
- Department of Nephrology, The Affiliated Hospital of Southwest Medical University, 25 Taiping Street, Jiangyang District, Luzhou, 646000, Sichuan, China
- Sichuan Clinical Research Center for Nephrology, Luzhou, 646000, Sichuan, China
- Metabolic Vascular Disease Key Laboratory of Sichuan Province, Luzhou, 646000, Sichuan, China
| | - Qian Yang
- Department of Nephrology, The Affiliated Hospital of Southwest Medical University, 25 Taiping Street, Jiangyang District, Luzhou, 646000, Sichuan, China
- Sichuan Clinical Research Center for Nephrology, Luzhou, 646000, Sichuan, China
- Metabolic Vascular Disease Key Laboratory of Sichuan Province, Luzhou, 646000, Sichuan, China
| | - Xiao Liu
- Department of Nephrology, The Affiliated Hospital of Southwest Medical University, 25 Taiping Street, Jiangyang District, Luzhou, 646000, Sichuan, China
- Sichuan Clinical Research Center for Nephrology, Luzhou, 646000, Sichuan, China
- Metabolic Vascular Disease Key Laboratory of Sichuan Province, Luzhou, 646000, Sichuan, China
| | - Weiming Zhou
- Department of Nephrology, The Affiliated Hospital of Southwest Medical University, 25 Taiping Street, Jiangyang District, Luzhou, 646000, Sichuan, China
- Sichuan Clinical Research Center for Nephrology, Luzhou, 646000, Sichuan, China
- Metabolic Vascular Disease Key Laboratory of Sichuan Province, Luzhou, 646000, Sichuan, China
| | - Ting Kang
- Department of Nephrology, The Affiliated Hospital of Southwest Medical University, 25 Taiping Street, Jiangyang District, Luzhou, 646000, Sichuan, China
- Sichuan Clinical Research Center for Nephrology, Luzhou, 646000, Sichuan, China
- Metabolic Vascular Disease Key Laboratory of Sichuan Province, Luzhou, 646000, Sichuan, China
| | - Weihua Wu
- Department of Nephrology, The Affiliated Hospital of Southwest Medical University, 25 Taiping Street, Jiangyang District, Luzhou, 646000, Sichuan, China
- Sichuan Clinical Research Center for Nephrology, Luzhou, 646000, Sichuan, China
- Metabolic Vascular Disease Key Laboratory of Sichuan Province, Luzhou, 646000, Sichuan, China
| | - Santao Ou
- Department of Nephrology, The Affiliated Hospital of Southwest Medical University, 25 Taiping Street, Jiangyang District, Luzhou, 646000, Sichuan, China.
- Sichuan Clinical Research Center for Nephrology, Luzhou, 646000, Sichuan, China.
- Metabolic Vascular Disease Key Laboratory of Sichuan Province, Luzhou, 646000, Sichuan, China.
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Wang X, Chang HC, Gu X, Han W, Mao S, Lu L, Jiang S, Ding H, Han S, Qu X, Bao Z. Renal lipid accumulation and aging linked to tubular cells injury via ANGPTL4. Mech Ageing Dev 2024; 219:111932. [PMID: 38580082 DOI: 10.1016/j.mad.2024.111932] [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: 03/29/2024] [Accepted: 04/02/2024] [Indexed: 04/07/2024]
Abstract
Renal tubular epithelial cells are vulnerable to stress-induced damage, including excessive lipid accumulation and aging, with ANGPTL4 potentially playing a crucial bridging role between these factors. In this study, RNA-sequencing was used to identify a marked increase in ANGPTL4 expression in kidneys of diet-induced obese and aging mice. Overexpression and knockout of ANGPTL4 in renal tubular epithelial cells (HK-2) was used to investigate the underlying mechanism. Subsequently, ANGPTL4 expression in plasma and kidney tissues of normal young controls and elderly individuals was analyzed using ELISA and immunohistochemical techniques. RNA sequencing results showed that ANGPTL4 expression was significantly upregulated in the kidney tissue of diet-induced obesity and aging mice. In vitro experiments demonstrated that overexpression of ANGPTL4 in HK-2 cells led to increased lipid deposition and senescence. Conversely, the absence of ANGPTL4 appears to alleviate the impact of free fatty acids (FFA) on aging in HK-2 cells. Additionally, aging HK-2 cells exhibited elevated ANGPTL4 expression, and stress response markers associated with cell cycle arrest. Furthermore, our clinical evidence revealed dysregulation of ANGPTL4 expression in serum and kidney tissue samples obtained from elderly individuals compared to young subjects. Our study findings indicate a potential association between ANGPTL4 and age-related metabolic disorders, as well as injury to renal tubular epithelial cells. This suggests that targeting ANGPTL4 could be a viable strategy for the clinical treatment of renal aging.
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Affiliation(s)
- Xiaojun Wang
- Department of Gerontology, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, China; Shanghai Key Laboratory of Clinical Geriatric Medicine, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, China
| | - Hung-Chen Chang
- Shanghai Key Laboratory of Clinical Geriatric Medicine, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, China; Department of Cardiology, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, China
| | - Xuchao Gu
- Shanghai Key Laboratory of Clinical Geriatric Medicine, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, China; Department of Traditional Chinese Medicine, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, China
| | - Wanlin Han
- Shanghai Key Laboratory of Clinical Geriatric Medicine, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, China; Department of Cardiology, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, China
| | - Shihang Mao
- Department of ENT Institute and Otorhinolaryngology, Eye & ENT Hospital, State Key Laboratory of Medical Neurobiology, NHC Key Laboratory of Hearing Medicine Research, Fudan University, Shanghai, China
| | - Lili Lu
- Shanghai Key Laboratory of Clinical Geriatric Medicine, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, China; Department of Traditional Chinese Medicine, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, China
| | - Shuai Jiang
- Shanghai Key Laboratory of Clinical Geriatric Medicine, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, China; Department of Thoracic Surgery, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, China
| | - Haiyong Ding
- Shanghai Key Laboratory of Clinical Geriatric Medicine, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, China; Department of Urologic Surgery, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, China.
| | - Shisheng Han
- Department of Nephrology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China.
| | - Xinkai Qu
- Shanghai Key Laboratory of Clinical Geriatric Medicine, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, China; Department of Cardiology, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, China.
| | - Zhijun Bao
- Department of Gerontology, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, China; Shanghai Key Laboratory of Clinical Geriatric Medicine, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, China.
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Zheng B, Lu D, Chen X, Yin Y, Chen W, Wang X, Lin H, Xu P, Wu A, Liu B. Tripterygium glycosides improve abnormal lipid deposition in nephrotic syndrome rat models. Ren Fail 2023; 45:2182617. [PMID: 36876728 PMCID: PMC10013393 DOI: 10.1080/0886022x.2023.2182617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023] Open
Abstract
OBJECTIVE The purpose of this study was to determine the effect of tripterygium glycosides (TGs) on regulating abnormal lipid deposition in nephrotic syndrome (NS) rats. METHODS Sprague-Dawley (SD) rats were injected with 6 mg/kg doxorubicin to construct nephrotic syndrome models (n = 6 per group), and then administered with TGs (10 mg/kg·d-1), prednisone (6.3 mg/kg·d-1), or pure water for 5 weeks. Biomedical indexes, such as urine protein/creatinine ratio (PCR), blood urea nitrogen (BUN), serum creatinine (Scr), serum albumin (SA), triglycerides (TG), total cholesterol (TC)were investigated to evaluate the renal injury of rats. H&E staining experiment was used to assess the pathological alterations. Oil Red O staining was used to assess the level of renal lipid deposition. Malondialdehyde (MDA) and glutathione (GSH) were measured to assess the extent of oxidative damage to the kidney. TUNEL staining was used to assess the status of apoptosis in the kidney. Western blot analysis was performed to examine the levels of relevant intracellular signaling molecules. RESULTS After treatment with TGs, those tested biomedical indexes were significantly improved, and the extent of kidney tissue pathological changes and lipid deposition in the kidney was diminished. Treatment with TGs decreased renal oxidative damage and apoptosis. Regarding the molecular mechanism, TGs significantly increased the protein expression levels of Bcl-2 but decreased the levels of CD36, ADFP, Bax, and Cleaved caspase-3. CONCLUSION TGs alleviates renal injury and lipid deposition induced by doxorubicin, suggesting that it may be a new strategy for reducing renal lipotoxicity in NS.
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Affiliation(s)
- Bidan Zheng
- Guangdong Provincial Key Laboratory of Clinical Research on Traditional Chinese Medicine Syndrome, The Second Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Dongfang Lu
- Guangdong Provincial Key Laboratory of Clinical Research on Traditional Chinese Medicine Syndrome, The Second Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xiuping Chen
- Guangdong Provincial Key Laboratory of Clinical Research on Traditional Chinese Medicine Syndrome, The Second Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yinghua Yin
- Guangdong Provincial Key Laboratory of Clinical Research on Traditional Chinese Medicine Syndrome, The Second Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Weiying Chen
- Guangdong Provincial Key Laboratory of Clinical Research on Traditional Chinese Medicine Syndrome, The Second Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China.,Guangzhou Key Laboratory of Chirality Research on Active Components of Traditional Chinese Medicine, Guangzhou, China
| | - Xiaowan Wang
- Guangdong Provincial Key Laboratory of Clinical Research on Traditional Chinese Medicine Syndrome, The Second Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Huanmei Lin
- Guangdong Provincial Key Laboratory of Clinical Research on Traditional Chinese Medicine Syndrome, The Second Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Peng Xu
- State Key Laboratory of Dampness Syndrome of Chinese Medicine, Guangzhou, China.,Guangdong Provincial Key Laboratory of Chinese Medicine for Prevention and Treatment of Refractory Chronic Diseases, The Second Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Aihua Wu
- Guangdong Provincial Key Laboratory of Clinical Research on Traditional Chinese Medicine Syndrome, The Second Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Bo Liu
- Guangdong Provincial Key Laboratory of Clinical Research on Traditional Chinese Medicine Syndrome, The Second Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China.,Guangzhou Key Laboratory of Chirality Research on Active Components of Traditional Chinese Medicine, Guangzhou, China.,State Key Laboratory of Dampness Syndrome of Chinese Medicine, Guangzhou, China
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Hirsutidin Prevents Cisplatin-Evoked Renal Toxicity by Reducing Oxidative Stress/Inflammation and Restoring the Endogenous Enzymatic and Non-Enzymatic Level. Biomedicines 2023; 11:biomedicines11030804. [PMID: 36979784 PMCID: PMC10045162 DOI: 10.3390/biomedicines11030804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 02/24/2023] [Accepted: 02/28/2023] [Indexed: 03/09/2023] Open
Abstract
Recent research has shown that phytocomponents may be useful in the treatment of renal toxicity. This study was conducted to evaluate the renal disease hirsutidin in the paradigm of renal toxicity induced by cisplatin. Male Wistar rats were given cisplatin (3 mg/kg body weight/day, for 25 days, i.p.) to induce renal toxicity. Experimental rats were randomly allocated to four different groups: group I received saline, group II received cisplatin, group III received cisplatin + hirsutidin (10 mg/kg)and group IV (per se)received hirsutidin (10 m/kg)for 25 days. Various biochemical parameters were assessed, oxidative stress (superoxide dismutase (SOD), glutathione transferase (GSH), malonaldehyde (MDA) and catalase (CAT)), blood-chemistry parameters (blood urea nitrogen (BUN) and cholesterol), non-protein-nitrogenous components (uric acid, urea, and creatinine), and anti-inflammatory-tumor necrosis factor-α (TNF-α), interleukin-1β(IL-1β). IL-6 and nuclear factor-kB (NFκB) were evaluated and histopathology was conducted. Hirsutidin alleviated renal injury which was manifested by significantly diminished uric acid, urea, urine volume, creatinine, and BUN, compared to the cisplatin group. Hirsutidin restored the activities of several antioxidant enzyme parameters—MDA, CAT, GSH, and SOD. Additionally, there was a decline in the levels of inflammatory markers—TNF-α, IL-1β, IL-6, and NFκB—compared to the cisplatin group. The current research study shows that hirsutidin may act as a therapeutic agent for the treatment of nephrotoxicity induced by cisplatin.
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Harley G, Katerelos M, Gleich K, de Souza DP, Narayana VK, Kemp BE, Power DA, Mount PF. Blocking AMPK signalling to acetyl-CoA carboxylase increases cisplatin-induced acute kidney injury and suppresses the benefit of metformin. Biomed Pharmacother 2022; 153:113377. [DOI: 10.1016/j.biopha.2022.113377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 06/25/2022] [Accepted: 07/06/2022] [Indexed: 11/27/2022] Open
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Kim JS, Han YK, Kong MJ, Park KM. Short-term control of diet affects cisplatin-induced acute kidney injury through modulation of mitochondrial dynamics and mitochondrial GSH. Physiol Rep 2022; 10:e15348. [PMID: 35748040 PMCID: PMC9226808 DOI: 10.14814/phy2.15348] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 05/22/2022] [Indexed: 04/21/2023] Open
Abstract
Obesity affects acute kidney injury (AKI) induced by various clinical settings, including transplantation and cisplatin-cancer therapy. However, the effect of short-term food intake change remains to be defined. Here, we investigated the effects of short-term high-fat diet intake and food restriction on cisplatin-induced AKI. Mice were fed either a high-fat diet (HFD) or a low-fat diet (LFD) for 11 days or were not fed for 40 hh (fasting), before cisplatin administration. Cisplatin-induced functional and structural damages to kidneys in both HFD- and LFD-fed mice, with greater damages in HFD-fed mice than LFD-fed mice. HFD decreased mitochondrial total glutathione (tGSH) level, along with increases in the plasma and kidney cholesterol levels. Cisplatin caused the increase of kidney cholesterol levels and oxidative stress, along with the decrease of mitochondrial tGSH levels. In addition, cisplatin-induced mitochondrial damage and apoptosis of tubular cells in both HFD- and LFD-fed mice. An increase of Fis1 (mitochondria fission 1 protein), whereas a decrease of Opa1 (mitochondria fusion 1 protein) occurred by cisplatin. These cisplatin effects were greater in HFD-fed mice than in LFD-fed mice. Administration of mitochondria-specific antioxidant treatment during HFD feeding inhibited these cisplatin-induced changes. Fasting for 40 h also significantly reduced the cisplatin-induced changes mentioned above. These data demonstrate that short-term HFD intake worsens cisplatin-induced oxidative stress by the reduction of mitochondrial tGSH, resulting in increased cisplatin-induced nephrotoxicity. These data newly indicate that the control of calorie intake, even for a short period, affects kidney susceptibility to injury. Although most studies described the effects of a long-term high-fat diet on the kidneys, in this study, we found that even if a high-fat diet was consumed for a short-term, physiological changes and mitochondria tGSH decrease in the kidneys, and consequently increased cisplatin-nephrotoxic susceptibility. These data suggest the association of calorie intake with kidney susceptibility to cisplatin.
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Affiliation(s)
- Ji Su Kim
- Department of Anatomy and BK21 PlusSchool of Medicine, Kyungpook National UniversityDaeguRepublic of Korea
| | - Yong Kwon Han
- Department of Anatomy and BK21 PlusSchool of Medicine, Kyungpook National UniversityDaeguRepublic of Korea
| | - Min Jung Kong
- Department of Anatomy and BK21 PlusSchool of Medicine, Kyungpook National UniversityDaeguRepublic of Korea
- Cardiovascular Research Institute, Kyungpook National UniversityDaeguRepublic of Korea
| | - Kwon Moo Park
- Department of Anatomy and BK21 PlusSchool of Medicine, Kyungpook National UniversityDaeguRepublic of Korea
- Cardiovascular Research Institute, Kyungpook National UniversityDaeguRepublic of Korea
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Pan X. The Roles of Fatty Acids and Apolipoproteins in the Kidneys. Metabolites 2022; 12:metabo12050462. [PMID: 35629966 PMCID: PMC9145954 DOI: 10.3390/metabo12050462] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 05/15/2022] [Accepted: 05/17/2022] [Indexed: 12/10/2022] Open
Abstract
The kidneys are organs that require energy from the metabolism of fatty acids and glucose; several studies have shown that the kidneys are metabolically active tissues with an estimated energy requirement similar to that of the heart. The kidneys may regulate the normal and pathological function of circulating lipids in the body, and their glomerular filtration barrier prevents large molecules or large lipoprotein particles from being filtered into pre-urine. Given the permeable nature of the kidneys, renal lipid metabolism plays an important role in affecting the rest of the body and the kidneys. Lipid metabolism in the kidneys is important because of the exchange of free fatty acids and apolipoproteins from the peripheral circulation. Apolipoproteins have important roles in the transport and metabolism of lipids within the glomeruli and renal tubules. Indeed, evidence indicates that apolipoproteins have multiple functions in regulating lipid import, transport, synthesis, storage, oxidation and export, and they are important for normal physiological function. Apolipoproteins are also risk factors for several renal diseases; for example, apolipoprotein L polymorphisms induce kidney diseases. Furthermore, renal apolipoprotein gene expression is substantially regulated under various physiological and disease conditions. This review is aimed at describing recent clinical and basic studies on the major roles and functions of apolipoproteins in the kidneys.
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Affiliation(s)
- Xiaoyue Pan
- Department of Foundations of Medicine, New York University Long Island School of Medicine, Mineola, New York, NY 11501, USA;
- Diabetes and Obesity Research Center, NYU Langone Hospital—Long Island, Mineola, New York, NY 11501, USA
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Gao Y, Ma Y, Xie D, Jiang H. ManNAc protects against podocyte pyroptosis via inhibiting mitochondrial damage and ROS/NLRP3 signaling pathway in diabetic kidney injury model. Int Immunopharmacol 2022; 107:108711. [PMID: 35338958 DOI: 10.1016/j.intimp.2022.108711] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 03/05/2022] [Accepted: 03/14/2022] [Indexed: 12/31/2022]
Abstract
Podocyte pyroptosis is an inflammatory form of cell death associated with Diabetic nephropathy (DN). It is reported that hyposialylated Angiopoietin-like-4 (Angptl4) secreted by glomerular podocytes plays an important role in the formation of proteinuria. Previous study indicated that supplementation of sialic acid precursor N-acetylmannosamine (ManNAc) could inhibit podocyte apoptosis and actin cytoskeleton rearrangement. Nevertheless, whether ManNAc could improve diabetic kidney damage by inhibiting podocyte pyroptosis remains unclear. This study aimed to explore the effect of ManNAc therapy on alleviating diabetic renal injury and podocyte pyroptosis, and its possible mechanism was also figured out. The male 8-week-old C57BL/6 mice were divided into three groups: control group, Streptozocin (STZ)-induced DN group, and ManNAc treated diabetic group. Then, the changes in renal function, renal histopathology, podocyte pyroptosis, reactive oxygen species (ROS), and mitochondrial dysfunction were measured. Herein, we observed that the upregulated expression of Angptl4 was involved in podocyte injury. ManNAc treatment ameliorated podocyte ultrastructure, renal function, and renal histopathology in STZ-induced DN mice. In addition, ManNAc administration attenuated podocyte cell death and suppressed the activation of Nucleotide leukin-rich polypeptide 3 (NLRP3), caspase-1, and interleukin-1β (IL-1β), and the cleavage of gasdermin-D (GSDMD). Moreover, ManNAc inhibited ROS production and restored mitochondrial morphology in vivo and vitro. Further, ManNAc administration significantly alleviated podocyte pyroptosis through inhibiting ROS/NLRP3 signaling pathway. Therefore, these results elucidated that the upregulated expression of Angptl4 was involved in podocyte injury and ManNAc treatment protected against podocyte pyroptosis via inhibiting mitochondrial injury and ROS/NLRP3 signaling pathway in DN mice.
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Affiliation(s)
- Yanmin Gao
- Department of General Practice, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai 200120, China; Department of General Practice, Kongjiang Community Health Service Center, Yangpu District, Shanghai 200093, China
| | - Yanli Ma
- Department of Pediatrics, Fourth People's Hospital Affiliated to Tongji University, Shanghai 200434, China
| | - Di Xie
- Emergency Department, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China.
| | - Hua Jiang
- Department of General Practice, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai 200120, China.
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Selective depletion of a CD64-expressing phagocyte subset mediates protection against toxic kidney injury and failure. Proc Natl Acad Sci U S A 2021; 118:2022311118. [PMID: 34518373 PMCID: PMC8488624 DOI: 10.1073/pnas.2022311118] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/04/2021] [Indexed: 01/16/2023] Open
Abstract
Dendritic cells (DC), macrophages, and monocytes, collectively known as mononuclear phagocytes (MPs), critically control tissue homeostasis and immune defense. However, there is a paucity of models allowing to selectively manipulate subsets of these cells in specific tissues. The steady-state adult kidney contains four MP subsets with Clec9a-expression history that include the main conventional DC1 (cDC1) and cDC2 subtypes as well as two subsets marked by CD64 but varying levels of F4/80. How each of these MP subsets contributes to the different phases of acute kidney injury and repair is unknown. We created a mouse model with a Cre-inducible lox-STOP-lox-diphtheria toxin receptor cassette under control of the endogenous CD64 locus that allows for diphtheria toxin-mediated depletion of CD64-expressing MPs without affecting cDC1, cDC2, or other leukocytes in the kidney. Combined with specific depletion of cDC1 and cDC2, we revisited the role of MPs in cisplatin-induced kidney injury. We found that the intrinsic potency reported for CD11c+ cells to limit cisplatin toxicity is specifically attributed to CD64+ MPs, while cDC1 and cDC2 were dispensable. Thus, we report a mouse model allowing for selective depletion of a specific subset of renal MPs. Our findings in cisplatin-induced injury underscore the value of dissecting the functions of individual MP subsets in kidney disease, which may enable therapeutic targeting of specific immune components in the absence of general immunosuppression.
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10
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Cohen A, Ioannidis K, Ehrlich A, Regenbaum S, Cohen M, Ayyash M, Tikva SS, Nahmias Y. Mechanism and reversal of drug-induced nephrotoxicity on a chip. Sci Transl Med 2021; 13:13/582/eabd6299. [PMID: 33627489 DOI: 10.1126/scitranslmed.abd6299] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 09/30/2020] [Accepted: 01/13/2021] [Indexed: 12/12/2022]
Abstract
The kidney plays a critical role in fluid homeostasis, glucose control, and drug excretion. Loss of kidney function due to drug-induced nephrotoxicity affects over 20% of the adult population. The kidney proximal tubule is a complex vascularized structure that is particularly vulnerable to drug-induced nephrotoxicity. Here, we introduce a model of vascularized human kidney spheroids with integrated tissue-embedded microsensors for oxygen, glucose, lactate, and glutamine, providing real-time assessment of cellular metabolism. Our model shows that both the immunosuppressive drug cyclosporine and the anticancer drug cisplatin disrupt proximal tubule polarity at subtoxic concentrations, leading to glucose accumulation and lipotoxicity. Impeding glucose reabsorption using glucose transport inhibitors blocked cyclosporine and cisplatin toxicity by 1000- to 3-fold, respectively. Retrospective study of 247 patients who were diagnosed with kidney damage receiving cyclosporine or cisplatin in combination with the sodium-glucose cotransporter-2 (SGLT2) inhibitor empagliflozin showed significant (P < 0.001) improvement of kidney function, as well as reduction in creatinine and uric acid, markers of kidney damage. These results demonstrate the potential of sensor-integrated kidney-on-chip platforms to elucidate mechanisms of action and rapidly reformulate effective therapeutic solutions, increasing drug safety and reducing the cost of clinical and commercial failures.
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Affiliation(s)
- Aaron Cohen
- Grass Center for Bioengineering, Benin School of Computer Science and Engineering, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.,Department of Cell and Developmental Biology, Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Konstantinos Ioannidis
- Grass Center for Bioengineering, Benin School of Computer Science and Engineering, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Avner Ehrlich
- Grass Center for Bioengineering, Benin School of Computer Science and Engineering, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.,Department of Cell and Developmental Biology, Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Shaun Regenbaum
- Grass Center for Bioengineering, Benin School of Computer Science and Engineering, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.,Tissue Dynamics, Jerusalem 91904, Israel
| | - Merav Cohen
- Grass Center for Bioengineering, Benin School of Computer Science and Engineering, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.,Department of Cell and Developmental Biology, Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Muneef Ayyash
- Grass Center for Bioengineering, Benin School of Computer Science and Engineering, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.,Tissue Dynamics, Jerusalem 91904, Israel
| | | | - Yaakov Nahmias
- Grass Center for Bioengineering, Benin School of Computer Science and Engineering, The Hebrew University of Jerusalem, Jerusalem 91904, Israel. .,Department of Cell and Developmental Biology, Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.,Tissue Dynamics, Jerusalem 91904, Israel
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Identification of Potential Gene and MicroRNA Biomarkers of Acute Kidney Injury. BIOMED RESEARCH INTERNATIONAL 2021; 2021:8834578. [PMID: 33506037 PMCID: PMC7810567 DOI: 10.1155/2021/8834578] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 11/30/2020] [Accepted: 12/16/2020] [Indexed: 12/27/2022]
Abstract
Acute kidney injury (AKI) is a disease that seriously endangers human health. At present, AKI lacks effective treatment methods, so it is particularly important to find effective treatment measures and targets. Bioinformatics analysis has become an important method to identify significant processes of disease occurrence and development. In this study, we analyzed the public expression profile with bioinformatics analysis to identify differentially expressed genes (DEGs) in two types of common AKI models (ischemia-reperfusion injury and cisplatin). DEGs were predicted in four commonly used microRNA databases, and it was found that miR-466 and miR-709 may play important roles in AKI. Then, we found key nodes through protein-protein interaction (PPI) network analysis and subnetwork analysis. Finally, by detecting the expression levels in the renal tissues of the two established AKI models, we found that Myc, Mcm5, E2f1, Oip5, Mdm2, E2f8, miR-466, and miR-709 may be important genes and miRNAs in the process of AKI damage repair. The findings of our study reveal some candidate genes, miRNAs, and pathways potentially involved in the molecular mechanisms of AKI. These data improve the current understanding of AKI and provide new insight for AKI research and treatment.
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12
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Shen X, Zhang Y, Lin C, Weng C, Wang Y, Feng S, Wang C, Shao X, Lin W, Li B, Wang H, Chen J, Jiang H. Calcineurin inhibitors ameliorate PAN-induced podocyte injury through the NFAT-Angptl4 pathway. J Pathol 2020; 252:227-238. [PMID: 32686149 DOI: 10.1002/path.5512] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Revised: 06/29/2020] [Accepted: 07/13/2020] [Indexed: 12/31/2022]
Abstract
Podocyte injury plays a vital role in proteinuria and nephrotic syndrome. Calcineurin (CaN) inhibitors are effective in reducing proteinuria. However, their molecular mechanism is still not fully understood. Angiopoietin-like-4 (ANGPTL4) is a secreted protein that mediates proteinuria in podocyte-related nephropathy. In this study, we established a puromycin aminonucleoside (PAN)-induced minimal-change disease (MCD) rat model and a cultured podocyte injury model. We found that CaN inhibitors protected against PAN-induced podocyte injury, accompanied by an inhibition of Nfatc1 and Angptl4 both in vivo and in vitro. Nfatc1 overexpression and knockdown experiments indicated that Angptl4 was regulated by Nfatc1 in podocytes. ChIP assays further demonstrated that Nfatc1 increased Angptl4 expression by binding to the Angptl4 promoter. In addition, overexpression and knockdown of Angptl4 revealed that Angptl4 directly induced rearrangement of the cytoskeleton of podocytes, reduced the expression of synaptopodin, and enhanced PAN-induced podocyte apoptosis. Furthermore, in a cohort of 83 MCD and 94 membranous nephropathy (MN) patients, we found increased expression of serum ANGPTL4 compared to 120 healthy controls, and there were close correlations between serum ANGPTL4 and Alb, urinary protein, urinary Alb, eGFR, Scr, and BUN in MCD patients. No obvious correlation was found in MN patients. Immunofluorescence studies indicated that increased ANGPTL4 in MCD and MN patients was located mostly in podocytes. In conclusion, our results demonstrate that CaN inhibitors ameliorate PAN-induced podocyte injury by targeting Angptl4 through the NFAT pathway, and Angptl4 plays a vital role in podocyte injury and is involved in human podocyte-related nephropathy. © 2020 The Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
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Affiliation(s)
- Xiujin Shen
- Kidney Disease Center, The First Affiliated Hospital, College of Medicine, Zhejiang University; Key Laboratory of Kidney Disease Prevention and Control Technology, Zhejiang Province; National Key Clinical Department of Kidney Diseases; Institute of Nephrology, Zhejiang University; The Third Grade Laboratory under the National State, Administration of Traditional Chinese Medicine, Hangzhou, PR China
| | - Ying Zhang
- Kidney Disease Center, The First Affiliated Hospital, College of Medicine, Zhejiang University; Key Laboratory of Kidney Disease Prevention and Control Technology, Zhejiang Province; National Key Clinical Department of Kidney Diseases; Institute of Nephrology, Zhejiang University; The Third Grade Laboratory under the National State, Administration of Traditional Chinese Medicine, Hangzhou, PR China
| | - Chuan Lin
- Kidney Disease Center, The First Affiliated Hospital, College of Medicine, Zhejiang University; Key Laboratory of Kidney Disease Prevention and Control Technology, Zhejiang Province; National Key Clinical Department of Kidney Diseases; Institute of Nephrology, Zhejiang University; The Third Grade Laboratory under the National State, Administration of Traditional Chinese Medicine, Hangzhou, PR China
| | - Chunhua Weng
- Kidney Disease Center, The First Affiliated Hospital, College of Medicine, Zhejiang University; Key Laboratory of Kidney Disease Prevention and Control Technology, Zhejiang Province; National Key Clinical Department of Kidney Diseases; Institute of Nephrology, Zhejiang University; The Third Grade Laboratory under the National State, Administration of Traditional Chinese Medicine, Hangzhou, PR China
| | - Yucheng Wang
- Kidney Disease Center, The First Affiliated Hospital, College of Medicine, Zhejiang University; Key Laboratory of Kidney Disease Prevention and Control Technology, Zhejiang Province; National Key Clinical Department of Kidney Diseases; Institute of Nephrology, Zhejiang University; The Third Grade Laboratory under the National State, Administration of Traditional Chinese Medicine, Hangzhou, PR China
| | - Shi Feng
- Kidney Disease Center, The First Affiliated Hospital, College of Medicine, Zhejiang University; Key Laboratory of Kidney Disease Prevention and Control Technology, Zhejiang Province; National Key Clinical Department of Kidney Diseases; Institute of Nephrology, Zhejiang University; The Third Grade Laboratory under the National State, Administration of Traditional Chinese Medicine, Hangzhou, PR China
| | - Cuili Wang
- Kidney Disease Center, The First Affiliated Hospital, College of Medicine, Zhejiang University; Key Laboratory of Kidney Disease Prevention and Control Technology, Zhejiang Province; National Key Clinical Department of Kidney Diseases; Institute of Nephrology, Zhejiang University; The Third Grade Laboratory under the National State, Administration of Traditional Chinese Medicine, Hangzhou, PR China
| | - Xue Shao
- Kidney Disease Center, The First Affiliated Hospital, College of Medicine, Zhejiang University; Key Laboratory of Kidney Disease Prevention and Control Technology, Zhejiang Province; National Key Clinical Department of Kidney Diseases; Institute of Nephrology, Zhejiang University; The Third Grade Laboratory under the National State, Administration of Traditional Chinese Medicine, Hangzhou, PR China
| | - Weiqiang Lin
- Kidney Disease Center, The First Affiliated Hospital, College of Medicine, Zhejiang University; Key Laboratory of Kidney Disease Prevention and Control Technology, Zhejiang Province; National Key Clinical Department of Kidney Diseases; Institute of Nephrology, Zhejiang University; The Third Grade Laboratory under the National State, Administration of Traditional Chinese Medicine, Hangzhou, PR China
| | - Bingjue Li
- Kidney Disease Center, The First Affiliated Hospital, College of Medicine, Zhejiang University; Key Laboratory of Kidney Disease Prevention and Control Technology, Zhejiang Province; National Key Clinical Department of Kidney Diseases; Institute of Nephrology, Zhejiang University; The Third Grade Laboratory under the National State, Administration of Traditional Chinese Medicine, Hangzhou, PR China
| | - Haibing Wang
- Central Laboratory, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, PR China
| | - Jianghua Chen
- Kidney Disease Center, The First Affiliated Hospital, College of Medicine, Zhejiang University; Key Laboratory of Kidney Disease Prevention and Control Technology, Zhejiang Province; National Key Clinical Department of Kidney Diseases; Institute of Nephrology, Zhejiang University; The Third Grade Laboratory under the National State, Administration of Traditional Chinese Medicine, Hangzhou, PR China
| | - Hong Jiang
- Kidney Disease Center, The First Affiliated Hospital, College of Medicine, Zhejiang University; Key Laboratory of Kidney Disease Prevention and Control Technology, Zhejiang Province; National Key Clinical Department of Kidney Diseases; Institute of Nephrology, Zhejiang University; The Third Grade Laboratory under the National State, Administration of Traditional Chinese Medicine, Hangzhou, PR China
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13
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Li M, Li CM, Ye ZC, Huang J, Li Y, Lai W, Peng H, Lou TQ. Sirt3 modulates fatty acid oxidation and attenuates cisplatin-induced AKI in mice. J Cell Mol Med 2020; 24:5109-5121. [PMID: 32281286 PMCID: PMC7205836 DOI: 10.1111/jcmm.15148] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 02/15/2020] [Accepted: 02/20/2020] [Indexed: 12/25/2022] Open
Abstract
Fatty acid oxidation (FAO) dysfunction is one of the important mechanisms of renal fibrosis. Sirtuin 3 (Sirt3) has been confirmed to alleviate acute kidney injury (AKI) by improving mitochondrial function and participate in the regulation of FAO in other disease models. However, it is not clear whether Sirt3 is involved in regulating FAO to improve the prognosis of AKI induced by cisplatin. Here, using a murine model of cisplatin-induced AKI, we revealed that there were significantly FAO dysfunction and extensive lipid deposition in the mice with AKI. Metabolomics analysis suggested reprogrammed energy metabolism and decreased ATP production. In addition, fatty acid deposition can increase reactive oxygen species (ROS) production and induce apoptosis. Our data suggested that Sirt3 deletion aggravated FAO dysfunction, resulting in increased apoptosis of kidney tissues and aggravated renal injury. The activation of Sirt3 by honokiol could improve FAO and renal function and reduced fatty acid deposition in wide-type mice, but not Sirt3-defective mice. We concluded that Sirt3 may regulate FAO by deacetylating liver kinase B1 and activating AMP-activated protein kinase. Also, the activation of Sirt3 by honokiol increased ATP production as well as reduced ROS and lipid peroxidation through improving mitochondrial function. Collectively, these results provide new evidence that Sirt3 is protective against AKI. Enhancing Sirt3 to improve FAO may be a potential strategy to prevent kidney injury in the future.
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Affiliation(s)
- Ming Li
- Division of Nephrology, Department of Medicine, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Can-Ming Li
- Division of Nephrology, Department of Medicine, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Zeng-Chun Ye
- Division of Nephrology, Department of Medicine, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Jiayan Huang
- Division of Nephrology, Department of Medicine, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Yin Li
- Division of Nephrology, Department of Medicine, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Weiyan Lai
- Division of Nephrology, Department of Medicine, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Hui Peng
- Division of Nephrology, Department of Medicine, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Tan-Qi Lou
- Division of Nephrology, Department of Medicine, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
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14
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Alteration of Angiopoietin-Like Protein 4 Levels in Serum or Urine Correlate with Different Biochemical Markers in Hyperlipidemia-Related Proteinuria. BIOMED RESEARCH INTERNATIONAL 2020; 2020:5281251. [PMID: 32280690 PMCID: PMC7125447 DOI: 10.1155/2020/5281251] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 01/26/2020] [Accepted: 02/29/2020] [Indexed: 01/28/2023]
Abstract
Angiopoietin-like protein 4 (ANGPTL4) is widely known as a key regulator of lipid metabolism. We investigated the relationship between ANGPTL4 expression in serum or urine and blood lipid or urine protein levels of patients with hyperlipidemia- (HL-) related proteinuria. Sixty-eight patients with HL-related proteinuria (HL-Pro group), 68 patients with HL without proteinuria (HL-NPro group), 46 patients with non-HL-related proteinuria (NHL-Pro group), and 50 healthy control (Con) subjects were selected. There were no significant differences in serum ANGPTL4 levels between the Con group (36.82 ± 17.03 ng/ml) and the HL-Pro group (27.94 (18.90, 53.72) ng/ml). Additionally, the serum ANGPTL4 levels in the HL-Pro group were significantly lower than those in the HL-NPro group (53.32 ± 24.01 ng/ml) (P < 0.001). The urine ANGPTL4/Cr levels in the HL-Pro group (52.01 (45.25, 79.79) μg/g) were significantly higher than those in the HL-NPro group (9.96 (8.35, 12.43) ng/ml) (P < 0.05). A significant alteration in urine ANGPTL4/Cr levels was observed in the NHL-Pro group (69.41 ± 55.36 μg/g) and the Con group (10.08 ± 2.38 μg/g) as well. There was no correlation between serum and urine ANGPTL4 levels of the four groups (P > 0.05). Serum ANGPTL4 levels (HL-Pro/HL-NPro group) were positively correlated with total cholesterol (TC) and triglyceride (TG) levels in hyperlipidemia patients. However, there was no correlation between urinary ANGPTL4 levels and TC or TG (P > 0.05). Urine ANGPTL4 levels were positively correlated with 24hUPro in patients with renal impairment (HL-Pro/NHL-Pro group). To summarize, ANGPTL4 may be considered an accurate predictor of proteinuria with HL. Notably, serum or urine ANGPTL4 levels indicated the degree of proteinuria or hyperlipidemia, respectively, in HL patients.
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15
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Li J, Li L, Guo D, Li S, Zeng Y, Liu C, Fu R, Huang M, Xie W. Triglyceride metabolism and angiopoietin-like proteins in lipoprotein lipase regulation. Clin Chim Acta 2020; 503:19-34. [PMID: 31923423 DOI: 10.1016/j.cca.2019.12.029] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 12/31/2019] [Accepted: 12/31/2019] [Indexed: 12/21/2022]
Abstract
Hypertriglyceridemia is a risk factor for a series of diseases, such as cardiovascular disease (CVD), diabetes and nonalcoholic fatty liver disease (NAFLD). Angiopoietin-like proteins (ANGPTLs) family, especially ANGPTL3, ANGPTL4 and ANGPTL8, which regulate lipoprotein lipase (LPL) activity, play pivotal roles in triglyceride (TG) metabolism and related diseases/complications. There are many transcriptional and post-transcriptional factors that participate in physiological and pathological regulation of ANGPTLs to affect triglyceride metabolism. This review is intended to focus on the similarity and difference in the expression, structural features, regulation profile of the three ANGPTLs and inhibitory models for LPL. Description of the regulatory factors of ANGPTLs and the properties in regulating the lipid metabolism involved in the underlying mechanisms in pathological effects on diseases will provide potential therapeutic approaches for the treatment of dyslipidemia related diseases.
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Affiliation(s)
- Jing Li
- Clinical Anatomy & Reproductive Medicine Application Institute, University of South China, Hengyang 421001, Hunan, China; 2016 Class of Clinical Medicine, University of South China, Hengyang 421001, Hunan, China
| | - Liang Li
- Department of Pathophysiology, University of South China, Hengyang 421001, Hunan, China
| | - DongMing Guo
- Clinical Anatomy & Reproductive Medicine Application Institute, University of South China, Hengyang 421001, Hunan, China
| | - SuYun Li
- Clinical Anatomy & Reproductive Medicine Application Institute, University of South China, Hengyang 421001, Hunan, China
| | - YuXin Zeng
- 2018 Class of Excellent Doctor, University of South China, Hengyang 421001, Hunan, China
| | - ChuHao Liu
- Clinical Anatomy & Reproductive Medicine Application Institute, University of South China, Hengyang 421001, Hunan, China; 2016 Class of Clinical Medicine, University of South China, Hengyang 421001, Hunan, China
| | - Ru Fu
- Clinical Anatomy & Reproductive Medicine Application Institute, University of South China, Hengyang 421001, Hunan, China; 2016 Class of Clinical Medicine, University of South China, Hengyang 421001, Hunan, China
| | - MengQian Huang
- 2015 Class of Clinical Medicine, Fuxing Hospital, Capital Medical University, Beijing 100038, China.
| | - Wei Xie
- Clinical Anatomy & Reproductive Medicine Application Institute, University of South China, Hengyang 421001, Hunan, China.
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16
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Iwaki T, Bennion BG, Stenson EK, Lynn JC, Otinga C, Djukovic D, Raftery D, Fei L, Wong HR, Liles WC, Standage SW. PPARα contributes to protection against metabolic and inflammatory derangements associated with acute kidney injury in experimental sepsis. Physiol Rep 2019; 7:e14078. [PMID: 31102342 PMCID: PMC6525329 DOI: 10.14814/phy2.14078] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 04/02/2019] [Accepted: 04/04/2019] [Indexed: 01/05/2023] Open
Abstract
Sepsis-associated acute kidney injury (AKI) is a significant problem in critically ill children and adults resulting in increased morbidity and mortality. Fundamental mechanisms contributing to sepsis-associated AKI are poorly understood. Previous research has demonstrated that peroxisome proliferator-activated receptor α (PPARα) expression is associated with reduced organ system failure in sepsis. Using an experimental model of polymicrobial sepsis, we demonstrate that mice deficient in PPARα have worse kidney function, which is likely related to reduced fatty acid oxidation and increased inflammation. Ultrastructural evaluation with electron microscopy reveals that the proximal convoluted tubule is specifically injured in septic PPARα deficient mice. In this experimental group, serum metabolomic analysis reveals unanticipated metabolic derangements in tryptophan-kynurenine-NAD+ and pantothenate pathways. We also show that a subgroup of children with sepsis whose genome-wide expression profiles are characterized by repression of the PPARα signaling pathway has increased incidence of severe AKI. These findings point toward interesting associations between sepsis-associated AKI and PPARα-driven fatty acid metabolism that merit further investigation.
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Affiliation(s)
- Takuma Iwaki
- Department of PediatricsUniversity of Washington School of MedicineSeattleWashington
- Department of PediatricsUniversity HospitalFaculty of MedicineKagawa UniversityKagawaJapan
| | - Brock G. Bennion
- Department of PediatricsUniversity of Washington School of MedicineSeattleWashington
- Department of Pathology and ImmunologyWashington University School of MedicineSt. LouisMissouri
| | - Erin K. Stenson
- Department of PediatricsSection of Critical CareUniversity of Colorado School of MedicineAnschutz Medical CenterChildren's Hospital ColoradoAuroraColorado
- Division of Critical Care MedicineCincinnati Children's Hospital Medical CenterCincinnatiOhio
| | - Jared C. Lynn
- Department of PediatricsUniversity of Washington School of MedicineSeattleWashington
| | - Cynthia Otinga
- Department of PediatricsUniversity of Washington School of MedicineSeattleWashington
| | - Danijel Djukovic
- Department of Chemistry and BiochemistryUniversity of ColoradoBoulderColorado
- Department of Anesthesiology and Pain MedicineUniversity of Washington School of MedicineSeattleWashington
| | - Daniel Raftery
- Department of Anesthesiology and Pain MedicineUniversity of Washington School of MedicineSeattleWashington
| | - Lin Fei
- Division of Biostatistics and EpidemiologyCincinnati Children's Hospital Medical CenterCincinnatiOhio
- Department of PediatricsUniversity of CincinnatiCincinnatiOhio
| | - Hector R. Wong
- Division of Critical Care MedicineCincinnati Children's Hospital Medical CenterCincinnatiOhio
- Department of PediatricsUniversity of CincinnatiCincinnatiOhio
| | - W. Conrad Liles
- Department of MedicineUniversity of Washington School of MedicineSeattleWashington
| | - Stephen W. Standage
- Department of PediatricsUniversity of Washington School of MedicineSeattleWashington
- Division of Critical Care MedicineCincinnati Children's Hospital Medical CenterCincinnatiOhio
- Department of PediatricsUniversity of CincinnatiCincinnatiOhio
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17
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Yang X, Xu W, Huang K, Zhang B, Wang H, Zhang X, Gong L, Luo Y, He X. Precision toxicology shows that troxerutin alleviates ochratoxin A-induced renal lipotoxicity. FASEB J 2018; 33:2212-2227. [PMID: 30247986 DOI: 10.1096/fj.201800742r] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Lipotoxicity is the most common cause of severe kidney disease, with few treatment options available today. Precision toxicology can improve detection of subtle intracellular changes in response to exogenous substrates; thus, it facilitates in-depth research on bioactive molecules that may interfere with the onset of certain diseases. In the current study, troxerutin significantly relieved nephrotoxicity, increased endurance, and improved systemic energy metabolism and renal inflammation in OTA-induced nephrotic mice. Lipidomics showed that troxerutin effectively reduced the levels of triglycerides, phosphatidylcholines, and phosphatidylethanolamines in nephropathy. The mechanism was partly attributable to troxerutin in alleviating the aberrantly up-regulated expression of sphingomyelinase, the cystic fibrosis transmembrane conductance regulator, and chloride channel 2. Renal tubular epithelial cells, the main site of toxin-induced accumulation of lipids in the kidney, were subjected to transcriptomic profiling, which uncovered several metabolic factors relevant to aberrant lipid and lipoprotein metabolism. Our work provides new insights into the molecular features of toxin-induced lipotoxicity in renal tubular epithelial cells in vivo and demonstrates the function of troxerutin in alleviating OTA-induced nephrosis and associated systemic energy metabolism disorders.-Yang, X., Xu, W., Huang, K., Zhang, B., Wang, H., Zhang, X., Gong, L., Luo, Y., He, X. Precision toxicology shows that troxerutin alleviates ochratoxin A-induced renal lipotoxicity.
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Affiliation(s)
- Xuan Yang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Wentao Xu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China.,Beijing Laboratory for Food Quality and Safety, Beijing, China
| | - Kunlun Huang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China.,Beijing Laboratory for Food Quality and Safety, Beijing, China
| | - Boyang Zhang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Haomiao Wang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Xueqin Zhang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Lijing Gong
- China Academy of Sport and Health Sciences, Beijing Sport University, Beijing, China
| | - Yunbo Luo
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China.,Key Laboratory of Safety Assessment of Genetically Modified Organism-Food Safety, Ministry of Agriculture, China
| | - Xiaoyun He
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China.,Key Laboratory of Safety Assessment of Genetically Modified Organism-Food Safety, Ministry of Agriculture, China
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18
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Physical exercise contributes to cisplatin-induced nephrotoxicity protection with decreased CD4+ T cells activation. Mol Immunol 2018; 101:507-513. [DOI: 10.1016/j.molimm.2018.08.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Revised: 06/28/2018] [Accepted: 08/13/2018] [Indexed: 12/13/2022]
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19
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Kim SJ, Park C, Lee JN, Park R. Protective roles of fenofibrate against cisplatin-induced ototoxicity by the rescue of peroxisomal and mitochondrial dysfunction. Toxicol Appl Pharmacol 2018; 353:43-54. [PMID: 29908243 DOI: 10.1016/j.taap.2018.06.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Revised: 05/18/2018] [Accepted: 06/12/2018] [Indexed: 12/20/2022]
Abstract
Cisplatin is an alkylating agent that interferes with DNA replication and kills proliferating carcinogenic cells. Several studies have been conducted to attenuate the side effects of cisplatin; one such side effect in cancer patients undergoing cisplatin chemotherapy is ototoxicity. However, owing to a lack of understanding of the precise mechanism underlying cisplatin-induced side effects, management of cisplatin-induced ototoxicity remains unsolved. We investigated the protective effects of fenofibrate, a PPAR-α activator, on cisplatin-induced ototoxicity. Fenofibrate prevented cisplatin-induced loss of hair cells and improved cell viability; moreover, fenofibrate significantly attenuated the threshold of auditory brainstem responses (ABR) in cisplatin-injected mice. Fenofibrate significantly increased PPAR-α, PPAR-γ, and PGC-1α expression, which consequently resulted in increased number and functional enzyme levels of peroxisomes and mitochondria, and markedly decreased phospho-p53 (S15), activated caspase-3, cleaved-PARP, and NF-κB p65 nuclear translocation, which reduced NADPH oxidase isoform (NOX3 and NOX4) expression, thereby decreasing reactive oxygen species (ROS) production in cisplatin-treated tissues ex vivo. Taken together, these results indicate that fenofibrate rescues cisplatin-induced ototoxicity by maintaining peroxisome and mitochondria number and function, reducing inflammation, and decreasing ROS levels. Our findings suggest that fenofibrate administration might serve as an effective therapeutic agent against cisplatin-induced ototoxicity.
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Affiliation(s)
- Se-Jin Kim
- Lab of Peroxisomes & Lipid Metabolism, Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
| | - Channy Park
- Lab of Peroxisomes & Lipid Metabolism, Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
| | - Joon No Lee
- Lab of Peroxisomes & Lipid Metabolism, Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
| | - Raekil Park
- Lab of Peroxisomes & Lipid Metabolism, Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea.
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20
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Lagies S, Pichler R, Kaminski MM, Schlimpert M, Walz G, Lienkamp SS, Kammerer B. Metabolic characterization of directly reprogrammed renal tubular epithelial cells (iRECs). Sci Rep 2018; 8:3878. [PMID: 29497074 PMCID: PMC5832874 DOI: 10.1038/s41598-018-22073-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Accepted: 02/15/2018] [Indexed: 12/11/2022] Open
Abstract
Fibroblasts can be directly reprogrammed to induced renal tubular epithelial cells (iRECs) using four transcription factors. These engineered cells may be used for disease modeling, cell replacement therapy or drug and toxicity testing. Direct reprogramming induces drastic changes in the transcriptional landscape, protein expression, morphological and functional properties of cells. However, how the metabolome is changed by reprogramming and to what degree it resembles the target cell type remains unknown. Using untargeted gas chromatography-mass spectrometry (GC-MS) and targeted liquid chromatography-MS, we characterized the metabolome of mouse embryonic fibroblasts (MEFs), iRECs, mIMCD-3 cells, and whole kidneys. Metabolic fingerprinting can distinguish each cell type reliably, revealing iRECs are most similar to mIMCD-3 cells and clearly separate from MEFs used for reprogramming. Treatment with the cytotoxic drug cisplatin induced typical changes in the metabolic profile of iRECs commonly occurring in acute renal injury. Interestingly, metabolites in the medium of iRECs, but not of mIMCD-3 cells or fibroblast could distinguish treated and non-treated cells by cluster analysis. In conclusion, direct reprogramming of fibroblasts into renal tubular epithelial cells strongly influences the metabolome of engineered cells, suggesting that metabolic profiling may aid in establishing iRECs as in vitro models for nephrotoxicity testing in the future.
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Affiliation(s)
- Simon Lagies
- Center for Biosystems Analysis (ZBSA), Albert-Ludwigs-University Freiburg, Habsburgerstr. 49, 79104, Freiburg, Germany
- Spemann Graduate School of Biology and Medicine (SGBM), University of Freiburg, Albertstr. 19a, 79104, Freiburg, Germany
- Faculty of Biology, University of Freiburg, Schänzlestr. 1, 79104, Freiburg, Germany
| | - Roman Pichler
- Department of Medicine, Renal Division, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany
| | - Michael M Kaminski
- Department of Medicine, Renal Division, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany
| | - Manuel Schlimpert
- Center for Biosystems Analysis (ZBSA), Albert-Ludwigs-University Freiburg, Habsburgerstr. 49, 79104, Freiburg, Germany
- Spemann Graduate School of Biology and Medicine (SGBM), University of Freiburg, Albertstr. 19a, 79104, Freiburg, Germany
- Faculty of Biology, University of Freiburg, Schänzlestr. 1, 79104, Freiburg, Germany
| | - Gerd Walz
- Department of Medicine, Renal Division, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany
- BIOSS Centre of Biological Signalling Studies, University of Freiburg, Schänzlestr. 18, 79104, Freiburg, Germany
| | - Soeren S Lienkamp
- Department of Medicine, Renal Division, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany.
- BIOSS Centre of Biological Signalling Studies, University of Freiburg, Schänzlestr. 18, 79104, Freiburg, Germany.
| | - Bernd Kammerer
- Center for Biosystems Analysis (ZBSA), Albert-Ludwigs-University Freiburg, Habsburgerstr. 49, 79104, Freiburg, Germany.
- BIOSS Centre of Biological Signalling Studies, University of Freiburg, Schänzlestr. 18, 79104, Freiburg, Germany.
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Lin MT, Ko JL, Liu TC, Chao PT, Ou CC. Protective Effect of D-Methionine on Body Weight Loss, Anorexia, and Nephrotoxicity in Cisplatin-Induced Chronic Toxicity in Rats. Integr Cancer Ther 2018; 17:813-824. [PMID: 29430988 PMCID: PMC6142074 DOI: 10.1177/1534735417753543] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
D-methionine is a sulfur-containing amino acid that can act as a potent antioxidant. Anorexia and nephrotoxicity are side effects of cisplatin. The protective effects of D-methionine on cisplatin-induced anorexia and renal injury were investigated. The model of chronic cisplatin administration (5 mg/kg body weight) involved intraperitoneal injection on days 1, 8, and 15 and oral D-methionine (300 mg/kg body weight) coadministration daily for 20 days. On the 21st day of treatment, food intake and body weight in the cisplatin-treated group significantly decreased by 52% and 31%, respectively, when compared with a control group. D-methionine coadministration with cisplatin decreased food intake and body weight by 29% and 8%, respectively. In cisplatin-treated rats, white blood cell, mean corpuscular volume, and platelet values significantly decreased, while mean corpuscular hemoglobin concentration significantly increased by 8.6% when compared with control rats. Cisplatin administration resulted in significantly decreased feeding efficiency, elevated renal oxidative stress, and reduced antioxidative activity. Leukocyte infiltration, tubule vacuolization, tubular expansion, and swelling were observed in the kidneys of cisplatin-treated rats. Oral D-methionine exhibited an antianorexic effect, with improvement in food intake, feeding efficiency, and hematological toxicities, as well as a protective effect against nephrotoxicity by elevated antioxidative activity. D-methionine may serve as a chemoprotectant in patients receiving cisplatin as part of a chemotherapy regimen.
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Affiliation(s)
- Ming-Tai Lin
- 1 Changhua Christian Hospital, Changhua City, Taiwan
| | | | - Te-Chung Liu
- 2 Chung Shan Medical University, Taichung, Taiwan
| | | | - Chu-Chyn Ou
- 2 Chung Shan Medical University, Taichung, Taiwan.,3 Chung Shan Medical University Hospital, Taichung, Taiwan
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22
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Wang Y, Luo X, Pan H, Huang W, Wang X, Wen H, Shen K, Jin B. Pharmacological inhibition of NADPH oxidase protects against cisplatin induced nephrotoxicity in mice by two step mechanism. Food Chem Toxicol 2015; 83:251-60. [DOI: 10.1016/j.fct.2015.05.007] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Revised: 04/30/2015] [Accepted: 05/18/2015] [Indexed: 02/05/2023]
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23
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Omega-3 fatty acids protect renal functions by increasing docosahexaenoic acid-derived metabolite levels in SHR.Cg-Lepr(cp)/NDmcr rats, a metabolic syndrome model. Molecules 2014; 19:3247-63. [PMID: 24642910 PMCID: PMC6271130 DOI: 10.3390/molecules19033247] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2013] [Revised: 03/07/2014] [Accepted: 03/07/2014] [Indexed: 01/01/2023] Open
Abstract
The omega-3 polyunsaturated fatty acids (ω-3 PUFAs) docosahexaenoic acid (DHA) and/or eicosapentaenoic acid (EPA) protect against diabetic nephropathy by inhibiting inflammation. The aim of this study was to assess the effects of highly purified DHA and EPA or EPA only administration on renal function and renal eicosanoid and docosanoid levels in an animal model of metabolic syndrome, SHR.Cg-Leprcp/NDmcr (SHRcp) rats. Male SHRcp rats were divided into 3 groups. Control (5% arabic gum), TAK-085 (300 mg/kg/day, containing 467 mg/g EPA and 365 mg/g DHA), or EPA (300 mg/kg/day) was orally administered for 20 weeks. The urinary albumin to creatinine ratio in the TAK-085-administered group was significantly lower than that in other groups. The glomerular sclerosis score in the TAK-085-administered group was significantly lower than that in the other groups. Although DHA levels were increased in total kidney fatty acids, the levels of nonesterified DHA were not significantly different among the 3 groups, whereas the levels of protectin D1, resolvin D1, and resolvin D2 were significantly increased in the TAK-085-administered group. The results show that the use of combination therapy with DHA and EPA in SHRcp rats improved or prevented renal failure associate with metabolic syndrome with decreasing triglyceride levels and increasing ω-3 PUFA lipid mediators.
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24
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Herman-Edelstein M, Scherzer P, Tobar A, Levi M, Gafter U. Altered renal lipid metabolism and renal lipid accumulation in human diabetic nephropathy. J Lipid Res 2013; 55:561-72. [PMID: 24371263 DOI: 10.1194/jlr.p040501] [Citation(s) in RCA: 388] [Impact Index Per Article: 35.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Animal models link ectopic lipid accumulation to renal dysfunction, but whether this process occurs in the human kidney is uncertain. To this end, we investigated whether altered renal TG and cholesterol metabolism results in lipid accumulation in human diabetic nephropathy (DN). Lipid staining and the expression of lipid metabolism genes were studied in kidney biopsies of patients with diagnosed DN (n = 34), and compared with normal kidneys (n = 12). We observed heavy lipid deposition and increased intracellular lipid droplets. Lipid deposition was associated with dysregulation of lipid metabolism genes. Fatty acid β-oxidation pathways including PPAR-α, carnitine palmitoyltransferase 1, acyl-CoA oxidase, and L-FABP were downregulated. Downregulation of renal lipoprotein lipase, which hydrolyzes circulating TGs, was associated with increased expression of angiopoietin-like protein 4. Cholesterol uptake receptor expression, including LDL receptors, oxidized LDL receptors, and acetylated LDL receptors, was significantly increased, while there was downregulation of genes effecting cholesterol efflux, including ABCA1, ABCG1, and apoE. There was a highly significant correlation between glomerular filtration rate, inflammation, and lipid metabolism genes, supporting a possible role of abnormal lipid metabolism in the pathogenesis of DN. These data suggest that renal lipid metabolism may serve as a target for specific therapies aimed at slowing the progression of glomerulosclerosis.
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Affiliation(s)
- Michal Herman-Edelstein
- Felsenstein Medical Research Center, and Departments of Nephrology Rabin Medical Center, Sackler School of Medicine Tel Aviv University, Tel Aviv, Israel
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25
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Dong CQ, Luo YG, Dong K, Chen C, Liu Q, Yang TQ. Relationship between apolipoprotein E gene polymorphism with triglyceride level in patients with renal diseases. Ren Fail 2013; 35:1449-54. [PMID: 24001346 DOI: 10.3109/0886022x.2013.829407] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Apolipoprotein E (apoE), one of the major plasma lipoproteins, plays a major role in the transport and metabolism of lipids by acting as a ligand. apoE gene contains three potential alleles: ϵ2, ϵ3 and ϵ4, forming six genotypes: E2E2, E2E3, E2E4, E3E3, E3E3 and E4E4. Association between apoE gene polymorphism and triglyceride (TG) is still controversial. There was not any meta-analysis to explore the association of apoE gene polymorphism with triglyceride level, and this meta-analysis was performed to evaluate the association between apoE gene polymorphism and triglyceride in patients with renal diseases. A predefined literature search and selection of eligible relevant studies were performed to collect data from electronic databases. Twenty-four articles were identified for the analysis of association between apoE gene polymorphism and triglyceride level. Subjects with E2E3 or E3E4 had a higher TG than those with E3E3. Subjects with ϵ4 had a higher TG than those with ϵ3. Subjects with ϵ2 had a slightly higher TG than those with ϵ3, although there was no statistical difference. Interestingly, subjects with ϵ4 had a much higher TG than those with ϵ2. In conclusion, E2E3, E3E4 or ϵ4 was associated with higher level of TG. However, more studies should be performed in the future.
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Affiliation(s)
- Chun-Qiang Dong
- Department of Pediatric Surgery, The First Affiliated Hospital of GuangXi Medical University , NanNing , China
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