51
|
Chang J, Yan J, Li X, Liu N, Zheng R, Zhong Y. Update on the Mechanisms of Tubular Cell Injury in Diabetic Kidney Disease. Front Med (Lausanne) 2021; 8:661076. [PMID: 33859992 PMCID: PMC8042139 DOI: 10.3389/fmed.2021.661076] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Accepted: 03/08/2021] [Indexed: 02/06/2023] Open
Abstract
Increasing evidence supports a role of proximal tubular (PT) injury in the progression of diabetic kidney disease (DKD), in patients with or without proteinuria. Research on the mechanisms of the PT injury in DKD could help us to identify potential new biomarkers and drug targets for DKD. A high glucose transport state and mismatched local hypoxia in the PT of diabetes patients may be the initiating factors causing PT injury. Other mechanism such as mitochondrial dysfunction, reactive oxygen species (ROS) overproduction, ER stress, and deficiency of autophagy interact with each other leading to more PT injury by forming a vicious circle. PT injury eventually leads to the development of tubulointerstitial inflammation and fibrosis in DKD. Many downstream signaling pathways have been demonstrated to mediate these diseased processes. This review focuses mostly on the novel mechanisms of proximal renal tubular injury in DKD and we believe such review could help us to better understand the pathogenesis of DKD and identify potential new therapies for this disease.
Collapse
Affiliation(s)
- Jingsheng Chang
- Department of Nephrology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Jiayi Yan
- Department of Nephrology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Xueling Li
- Department of Nephrology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Ni Liu
- Department of Nephrology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Rong Zheng
- Department of Nephrology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yifei Zhong
- Department of Nephrology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| |
Collapse
|
52
|
Liu H, Yan R, Liang L, Zhang H, Xiang J, Liu L, Zhang X, Mao Y, Peng W, Xiao Y, Zhang F, Zhou Y, Shi M, Wang Y, Guo B. The role of CDX2 in renal tubular lesions during diabetic kidney disease. Aging (Albany NY) 2021; 13:6782-6803. [PMID: 33621200 PMCID: PMC7993706 DOI: 10.18632/aging.202537] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 12/09/2020] [Indexed: 02/05/2023]
Abstract
Renal tubules are vulnerable targets of various factors causing kidney injury in diabetic kidney disease (DKD), and the degree of tubular lesions is closely related to renal function. Abnormal renal tubular epithelial cells (RTECs) differentiation and depletion of cell junction proteins are important in DKD pathogenesis. Caudal-type homeobox transcription factor 2 (CDX2), represents a key nuclear transcription factor that maintains normal proliferation and differentiation of the intestinal epithelium. The present study aimed to evaluate the effects of CDX2 on RTECs differentiation and cell junction proteins in DKD. The results demonstrated that CDX2 was mainly localized in renal tubules, and downregulated in various DKD models. CDX2 upregulated E-cadherin and suppressed partial epithelial-mesenchymal transition (EMT), which can alleviate hyperglycemia-associated RTECs injury. Cystic fibrosis transmembrane conductance regulator (CFTR) was regulated by CDX2 in NRK-52E cells, and CFTR interfered with β-catenin activation by binding to Dvl2, which is an essential component of Wnt/β-catenin signaling. CFTR knockdown abolished the suppressive effects of CDX2 on Wnt/β-catenin signaling, thereby upregulating cell junction proteins and inhibiting partial EMT in RTECs. In summary, CDX2 can improve renal tubular lesions during DKD by increasing CFTR amounts to suppress the Wnt/β-catenin signaling pathway.
Collapse
Affiliation(s)
- Huiming Liu
- Department of Pathophysiology, Guizhou Medical University, Guiyang 550025, Guizhou, China
- Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research on Common Chronic Diseases, Guizhou Medical University, Guiyang 550025, Guizhou, China
- Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, China
| | - Rui Yan
- Department of Nephrology, Affiliated Hospital of Guizhou Medical University, Guiyang 550025, Guizhou, China
| | - Luqun Liang
- Department of Pathophysiology, Guizhou Medical University, Guiyang 550025, Guizhou, China
- Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research on Common Chronic Diseases, Guizhou Medical University, Guiyang 550025, Guizhou, China
| | - Huifang Zhang
- Department of Pathophysiology, Guizhou Medical University, Guiyang 550025, Guizhou, China
- Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research on Common Chronic Diseases, Guizhou Medical University, Guiyang 550025, Guizhou, China
| | - Jiayi Xiang
- Department of Pathophysiology, Guizhou Medical University, Guiyang 550025, Guizhou, China
- Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research on Common Chronic Diseases, Guizhou Medical University, Guiyang 550025, Guizhou, China
| | - Lingling Liu
- Department of Pathophysiology, Guizhou Medical University, Guiyang 550025, Guizhou, China
- Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research on Common Chronic Diseases, Guizhou Medical University, Guiyang 550025, Guizhou, China
| | - Xiaohuan Zhang
- Department of Pathophysiology, Guizhou Medical University, Guiyang 550025, Guizhou, China
- Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research on Common Chronic Diseases, Guizhou Medical University, Guiyang 550025, Guizhou, China
| | - Yanwen Mao
- Department of Pathophysiology, Guizhou Medical University, Guiyang 550025, Guizhou, China
- Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research on Common Chronic Diseases, Guizhou Medical University, Guiyang 550025, Guizhou, China
| | - Wei Peng
- Department of Pathophysiology, Guizhou Medical University, Guiyang 550025, Guizhou, China
- Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research on Common Chronic Diseases, Guizhou Medical University, Guiyang 550025, Guizhou, China
| | - Ying Xiao
- Department of Pathophysiology, Guizhou Medical University, Guiyang 550025, Guizhou, China
- Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research on Common Chronic Diseases, Guizhou Medical University, Guiyang 550025, Guizhou, China
| | - Fan Zhang
- Department of Pathophysiology, Guizhou Medical University, Guiyang 550025, Guizhou, China
- Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research on Common Chronic Diseases, Guizhou Medical University, Guiyang 550025, Guizhou, China
| | - Yuxia Zhou
- Department of Pathophysiology, Guizhou Medical University, Guiyang 550025, Guizhou, China
- Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research on Common Chronic Diseases, Guizhou Medical University, Guiyang 550025, Guizhou, China
| | - Mingjun Shi
- Department of Pathophysiology, Guizhou Medical University, Guiyang 550025, Guizhou, China
- Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research on Common Chronic Diseases, Guizhou Medical University, Guiyang 550025, Guizhou, China
| | - Yuanyuan Wang
- Department of Pathophysiology, Guizhou Medical University, Guiyang 550025, Guizhou, China
- Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research on Common Chronic Diseases, Guizhou Medical University, Guiyang 550025, Guizhou, China
| | - Bing Guo
- Department of Pathophysiology, Guizhou Medical University, Guiyang 550025, Guizhou, China
- Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research on Common Chronic Diseases, Guizhou Medical University, Guiyang 550025, Guizhou, China
| |
Collapse
|
53
|
Huang J, Ladeiras D, Yu Y, Ming XF, Yang Z. Detrimental Effects of Chronic L-Arginine Rich Food on Aging Kidney. Front Pharmacol 2021; 11:582155. [PMID: 33542686 PMCID: PMC7851093 DOI: 10.3389/fphar.2020.582155] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Accepted: 11/18/2020] [Indexed: 11/13/2022] Open
Abstract
The impaired L-arginine/nitric oxide pathway is a well-recognized mechanism for cardiovascular and renal diseases with aging. Therefore, supplementation of L-arginine is widely proposed to boost health or as adjunct therapy for the patients. However, clinical data, show adverse effects and even enhanced mortality in patients receiving long-term L-arginine supplementation. The effects of long-term L-arginine supplementation on kidney aging and the underlying mechanisms remain elusive. Moreover, high protein and high amino acid diet has been thought detrimental for kidney. We therefore investigated effects of chronic dietary L-arginine supplementation on kidney aging. In both young (4 months) and old (18-24 months) mice, animals either receive standard chow containing 0.65% L-arginine or diet supplemented with L-arginine to 2.46% for 16 weeks. Inflammation and fibrosis markers and albuminuria are then analyzed. Age-associated increases in tnf-α, il-1β, and il-6, vcam-1, icam-1, mcp1, inos, and macrophage infiltration, collagen expression, and S6K1 activation are observed, which is not favorably affected, but rather further enhanced, by L-arginine supplementation. Importantly, L-arginine supplementation further enhances age-associated albuminuria and mortality particularly in females, accompanied by elevated renal arginase-II (Arg-II) levels. The enhanced albuminuria by L-arginine supplementation in aging is not protected in Arg-II-/- mice. In contrast, L-arginine supplementation increases ROS and decreases nitric oxide production in old mouse aortas, which is reduced in Arg-II-/- mice. The results do not support benefits of long-term L-arginine supplementation. It rather accelerates functional decline of kidney and vasculature in aging. Thus, the long-term dietary L-arginine supplementation should be avoided particularly in elderly population.
Collapse
Affiliation(s)
- Ji Huang
- Department of Endocrinology, Metabolism, and Cardiovascular System, Laboratory of Cardiovascular and Aging Research, Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland.,National Center of Competence in Research "Kidney.CH", University of Zürich, Zürich, Switzerland
| | - Diogo Ladeiras
- Department of Endocrinology, Metabolism, and Cardiovascular System, Laboratory of Cardiovascular and Aging Research, Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland.,National Center of Competence in Research "Kidney.CH", University of Zürich, Zürich, Switzerland
| | - Yi Yu
- Department of Endocrinology, Metabolism, and Cardiovascular System, Laboratory of Cardiovascular and Aging Research, Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland
| | - Xiu-Fen Ming
- Department of Endocrinology, Metabolism, and Cardiovascular System, Laboratory of Cardiovascular and Aging Research, Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland.,National Center of Competence in Research "Kidney.CH", University of Zürich, Zürich, Switzerland
| | - Zhihong Yang
- Department of Endocrinology, Metabolism, and Cardiovascular System, Laboratory of Cardiovascular and Aging Research, Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland.,National Center of Competence in Research "Kidney.CH", University of Zürich, Zürich, Switzerland
| |
Collapse
|
54
|
Zhang T, Guo S, Zhou H, Wu Z, Liu J, Qiu C, Deng G. Endometrial extracellular matrix rigidity and IFNτ ensure the establishment of early pregnancy through activation of YAP. Cell Prolif 2021; 54:e12976. [PMID: 33393124 PMCID: PMC7849163 DOI: 10.1111/cpr.12976] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 12/17/2020] [Accepted: 12/17/2020] [Indexed: 12/13/2022] Open
Abstract
Background In mammals, early pregnancy is a critical vulnerable period during which complications may arise, including pregnancy failure. Establishment of a maternal endometrial acceptance phenotype is a prerequisite for semiheterogeneous embryo implantation, comprising the rate‐limiting step of early pregnancy. Methods Confocal fluorescence, immunohistochemistry and western blot for nuclear and cytoplasmic protein were used to examine the activation of yes‐associated protein (YAP) in uterine tissue and primary endometrial cells. The target binding between miR16a and YAP was verified by dual‐luciferase reporter gene assay. The mouse pregnancy model and pseudopregnancy model were used to investigate the role of YAP in the maternal uterus during early pregnancy in vivo. Results We showed that YAP translocates into the nucleus in the endometrium of cattle and mice during early pregnancy. Mechanistically, YAP acts as a mediator of ECM rigidity and cell density, which requires the actomyosin cytoskeleton and is partially dependent on the Hippo pathway. Furthermore, we found that the soluble factor IFNτ, which is a ruminant pregnancy recognition factor, also induced activation of YAP by reducing the expression of miR‐16a. Conclusions This study revealed that activation of YAP is necessary for early pregnancy in bovines because it induced cell proliferation and established an immunosuppressive local environment that allowed conceptus implantation into the uterine epithelium.
Collapse
Affiliation(s)
- Tao Zhang
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Shuai Guo
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Han Zhou
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Zhimin Wu
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Junfeng Liu
- College of Animal Science, Tarim University, Alar, China
| | - Changwei Qiu
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| | - Ganzhen Deng
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
| |
Collapse
|
55
|
Wang Y, Liu Y, Zhang L, Bai L, Chen S, Wu H, Sun L, Wang X. miR-30b-5p modulate renal epithelial-mesenchymal transition in diabetic nephropathy by directly targeting SNAI1. Biochem Biophys Res Commun 2020; 535:12-18. [PMID: 33383483 DOI: 10.1016/j.bbrc.2020.10.096] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 10/29/2020] [Indexed: 12/11/2022]
Abstract
OBJECT Renal tubulointerstitial fibrosis plays a significant role in the development of diabetic nephropathy (DN). SNAI1 is a main activator of epithelial-to-mesenchymal transition (EMT) in the process of fibrosis. This study aimed to investigate the effect of miR-30b-5p targeting SNAI1 on the EMT in DN. METHODS Bioinformatics and miRNAs microarray analyses were used to predict the candidate miRNA targeting SNAI1, that is miR-30b-5p. The db/db mice was as DN animal model and renal tissues of mice were stained with PAS. The miR-30b-5p expression in mouse and human renal tissue were examined by quantitative RT-PCR (qRT-PCR) and fluorescence in situ hybridization (FISH), while SNAI1 expression was determined by qRT-PCR and immunohistochemistry. Luciferase reporter gene assay was used to confirm miR-30b-5p directly target 3'-UTR of the SNAI1 mRNA. In vitro, HK-2 cells were treated with high glucose to establish hyperglycemia cell model and transfected with miR-30b-5p mimics to overexpress miR-30b-5p. Expression of miR-30b-5p, SNAI1 and EMT related indicators (E-cadherin, a-SMA and Vimentin) in HK-2 cells under different treatments were determined by qRT-PCR and/or western-blot. In addition, immunofluorescence was performed to evaluate a-SMA expression in HK-2 cells under different treatments. RESULTS Bioinformatics analyses revealed miR-30b-5p had complementary sequences with SNAI1 mRNA and the seed region of miR-30b-5p was conserved in human and a variety of animals, including mice. Microarray analysis showed miR-30b expression decreased in DN mice, which was further verified in db/db mice by qRT-PCR and in human DN by FISH. Contrary to miR-30b-5p, SNAI1 expression level was upregulated in db/db mice. Correlation analysis suggested SNAI1 mRNA level was negatively with miR-30b-5p level in renal tissue of db/db mice. Luciferase reporter gene assay confirmed miR-30b-5p directly targeted SNAI1 mRNA. In high glucose induced HK-2 cells, expression levels of miR-30b-5p and E-cadherin were decreased, while SNAI1, a-SMA and Vimentin were increased. Overexpression miR-30b-5p in high glucose induced HK-2 cells could reverse that phenomenon to some extent. CONCLUSION These findings suggest that miR-30b-5p play a protective role by targeting SNAI1 in renal EMT in DN.
Collapse
Affiliation(s)
- Yanzhe Wang
- Department of Nephrology, Shanghai Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yuyuan Liu
- Department of Nephrology, Shanghai Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ling Zhang
- Department of Nephrology, Shanghai Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Linnan Bai
- Department of Nephrology, Shanghai Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Sijia Chen
- Department of Nephrology, Shanghai Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hao Wu
- Department of Nephrology, Shanghai Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Linlin Sun
- Department of Nephrology, Shanghai Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
| | - Xiaoxia Wang
- Department of Nephrology, Shanghai Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
| |
Collapse
|
56
|
Fabbiano F, Corsi J, Gurrieri E, Trevisan C, Notarangelo M, D'Agostino VG. RNA packaging into extracellular vesicles: An orchestra of RNA-binding proteins? J Extracell Vesicles 2020; 10:e12043. [PMID: 33391635 PMCID: PMC7769857 DOI: 10.1002/jev2.12043] [Citation(s) in RCA: 127] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 11/17/2020] [Accepted: 12/03/2020] [Indexed: 12/11/2022] Open
Abstract
Extracellular vesicles (EVs) are heterogeneous membranous particles released from the cells through different biogenetic and secretory mechanisms. We now conceive EVs as shuttles mediating cellular communication, carrying a variety of molecules resulting from intracellular homeostatic mechanisms. The RNA is a widely detected cargo and, impressively, a recognized functional intermediate that elects EVs as modulators of cancer cell phenotypes, determinants of disease spreading, cell surrogates in regenerative medicine, and a source for non-invasive molecular diagnostics. The mechanistic elucidation of the intracellular events responsible for the engagement of RNA into EVs will significantly improve the comprehension and possibly the prediction of EV "quality" in association with cell physiology. Interestingly, the application of multidisciplinary approaches, including biochemical as well as cell-based and computational strategies, is increasingly revealing an active RNA-packaging process implicating RNA-binding proteins (RBPs) in the sorting of coding and non-coding RNAs. In this review, we provide a comprehensive view of RBPs recently emerging as part of the EV biology, considering the scenarios where: (i) individual RBPs were detected in EVs along with their RNA substrates, (ii) RBPs were detected in EVs with inferred RNA targets, and (iii) EV-transcripts were found to harbour sequence motifs mirroring the activity of RBPs. Proteins so far identified are members of the hnRNP family (hnRNPA2B1, hnRNPC1, hnRNPG, hnRNPH1, hnRNPK, and hnRNPQ), as well as YBX1, HuR, AGO2, IGF2BP1, MEX3C, ANXA2, ALIX, NCL, FUS, TDP-43, MVP, LIN28, SRP9/14, QKI, and TERT. We describe the RBPs based on protein domain features, current knowledge on the association with human diseases, recognition of RNA consensus motifs, and the need to clarify the functional significance in different cellular contexts. We also summarize data on previously identified RBP inhibitor small molecules that could also be introduced in EV research as potential modulators of vesicular RNA sorting.
Collapse
Affiliation(s)
- Fabrizio Fabbiano
- Department of CellularComputational and Integrative Biology (CIBIO)University of TrentoTrentoItaly
| | - Jessica Corsi
- Department of CellularComputational and Integrative Biology (CIBIO)University of TrentoTrentoItaly
| | - Elena Gurrieri
- Department of CellularComputational and Integrative Biology (CIBIO)University of TrentoTrentoItaly
| | - Caterina Trevisan
- Department of CellularComputational and Integrative Biology (CIBIO)University of TrentoTrentoItaly
| | - Michela Notarangelo
- Department of CellularComputational and Integrative Biology (CIBIO)University of TrentoTrentoItaly
| | - Vito G. D'Agostino
- Department of CellularComputational and Integrative Biology (CIBIO)University of TrentoTrentoItaly
| |
Collapse
|
57
|
Zhang J, Zhu M, Zhang S, Xie S, Gao Y, Wang Y. Triptolide attenuates renal damage by limiting inflammatory responses in DOCA-salt hypertension. Int Immunopharmacol 2020; 89:107035. [PMID: 33045566 DOI: 10.1016/j.intimp.2020.107035] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 09/07/2020] [Accepted: 09/21/2020] [Indexed: 02/06/2023]
Abstract
BACKGROUND Triptolide (TP), a principal bioactive component of traditional Chinese medicine Tripterygium wilfordii Hook. F., has been shown to have immunosuppressive/anti-inflammatory actions in vitro. Moreover, it is well established that inflammatory mechanisms contribute to the progression of hypertension-induced renal injury. Therefore, this study was performed to determine the protective effects of TP on renal injury in salt-sensitive hypertension and to identify the possible mechanisms for TP-induced protection. METHODS Ten-week-old male C57BL/6 mice were subjected to uninephrectomy and deoxycorticosterone acetate (DOCA)-salt treatment with or without intraperitoneal administration of various concentrations of TP. RESULTS Five weeks after the treatment, systolic blood pressure measured by tail-cuff plethysmography increased in DOCA-salt-treated mice, but no difference was found between DOCA-salt-treated mice with or without TP treatment. Treatment with TP dose-dependently attenuated increments in urinary albumin and 8-isoprostane excretion, and glomerulosclerosis and tubulointerstitial injury and fibrosis in DOCA-salt-treated mice. Moreover, our data showed that treatment with TP dose-dependently inhibited DOCA-salt-induced interstitial monocyte/macrophage infiltration associated with decreases in renal levels of proinflammatory cytokine/chemokine and adhesion molecule, as well as renal activated NF-κB concentrations. Our results also demonstrated that suppression of inflammatory responses with dexamethasone, an immunosuppressive agent, alleviated DOCA-salt hypertension-induced renal injury. CONCLUSIONS TP treatment induced renal protection associated with inhibition of monocyte/macrophage-mediated inflammatory responses without lowering blood pressure. Thus, our data for the first time indicate that TP treatment ameliorates renal injury possibly via attenuating inflammatory responses in salt-sensitive hypertension.
Collapse
Affiliation(s)
- Jing Zhang
- Central Laboratory and Division of Cardiology, First Affiliated Hospital, Henan University of Traditional Chinese Medicine, Zhengzhou 450000, China
| | - Mingjun Zhu
- Central Laboratory and Division of Cardiology, First Affiliated Hospital, Henan University of Traditional Chinese Medicine, Zhengzhou 450000, China
| | - Shiyu Zhang
- Central Laboratory and Division of Cardiology, First Affiliated Hospital, Henan University of Traditional Chinese Medicine, Zhengzhou 450000, China
| | - Shiyang Xie
- Central Laboratory and Division of Cardiology, First Affiliated Hospital, Henan University of Traditional Chinese Medicine, Zhengzhou 450000, China
| | - Yuan Gao
- Central Laboratory and Division of Cardiology, First Affiliated Hospital, Henan University of Traditional Chinese Medicine, Zhengzhou 450000, China
| | - Youping Wang
- Central Laboratory and Division of Cardiology, First Affiliated Hospital, Henan University of Traditional Chinese Medicine, Zhengzhou 450000, China.
| |
Collapse
|
58
|
Kapucu A. Crocin ameliorates oxidative stress and suppresses renal damage in streptozotocin induced diabetic male rats. Biotech Histochem 2020; 96:153-160. [PMID: 32835521 DOI: 10.1080/10520295.2020.1808702] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Diabetes mellitus (DM) is a prevalent metabolic disorder with complications including nephropathy, neuropathy, retinopathy and peripheral vascular disease. Crocin is a water soluble carotenoid that exhibits strong antioxidant activity. I investigated the potential hypoglycemic and reno-protective effects of crocin for type 1 diabetic male rats using periodic acid-Schiff and hematoxylin staining; metalloproteinase-7 (MMP-7), phosphatase and tensin homolog (PTEN) and phospho-Akt (p-Akt) immunohistochemistry; measurement of blood glucose, malondialdehyde (MDA), superoxide dismutase (SOD), total antioxidant and total oxidant status; and oxidative stress index. I used four groups of rats: control (saline treated), diabetic (single dose of 65 mg/kg streptozotocin), crocin (treated with 50 mg/kg) and diabetic + crocin. Crocin decreased levels of MDA, SOD, oxidative stress index and glucose significantly in diabetic animals. Renal damage from DM also was decreased by crocin treatment. MMP-7 and p-Akt immunoreactivity were stronger in the diabetic group compared to other groups, but PTEN immunoreactivity was weaker. Crocin treatment returned MMP-7 and PTEN expression to near normal. The ameliorative effect of crocin is attributed to its stimulation of the antioxidant defense system and its ability to regulate the MMP-7/PTEN/Akt signaling cascade.
Collapse
Affiliation(s)
- Ayşegül Kapucu
- Department of Biology, Faculty of Science, Istanbul University , Istanbul, Turkey
| |
Collapse
|
59
|
Elk-1 transcriptionally regulates ZC3H4 expression to promote silica-induced epithelial-mesenchymal transition. J Transl Med 2020; 100:959-973. [PMID: 32218530 DOI: 10.1038/s41374-020-0419-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 03/09/2020] [Accepted: 03/11/2020] [Indexed: 12/11/2022] Open
Abstract
The epithelial-mesenchymal transition (EMT) process is a key priming activity of fibroblasts in pulmonary fibrosis during silicosis. Ets-like protein-1 (Elk-1) is a critical modulator that promotes functional changes in cells, and the effects are mediated by oxidative stress (OS). However, whether ELK-1 is involved in EMT of silicosis remains unclear. In addition, researchers have found that Elk-1 is involved in the expression of the gene zc3h12a, which encodes the protein MCPIP1, and MCPIP1 is a member of the zinc finger Cys-Cys-Cys-His (CCCH)-type protein family. A previous study from our lab showed that ZC3H4, which is also a member of the CCCH-type protein family, critically affected the regulation of EMT during silicosis. However, it has not yet been elucidated if ELK-1 acts at the promoter for zc3h4 to increase its expression in a mechanism that is similar to that of the zc3h12a gene and whether such regulation ultimately controls EMT. Therefore, we explored the correlation between ELK-1 and ZC3H4 expression and tested the underlying mechanisms affecting ELK-1 activation induced by silica. Our study identifies that SiO2-mediated EMT via ELK-1, with the upstream activity of OS and the downstream signaling of ZC3H4 expression resulting in enhanced EMT. These findings suggest that the nuclear transcription factor ELK-1 may be useful as a novel target for the treatment of pulmonary fibrosis.
Collapse
|
60
|
Khokhar M, Roy D, Modi A, Agarwal R, Yadav D, Purohit P, Sharma P. Perspectives on the role of PTEN in diabetic nephropathy: an update. Crit Rev Clin Lab Sci 2020; 57:470-483. [PMID: 32306805 DOI: 10.1080/10408363.2020.1746735] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Phosphatase and tensin homolog (PTEN) is a potent tumor suppressor gene that antagonizes the proto-oncogenic phosphatidylinositol 3 kinase (PI3K)/protein kinase B (Akt) signaling pathway and governs basic cellular metabolic processes. Recently, its role in cell growth, metabolism, architecture, and motility as an intramolecular and regulatory mediator has gained widespread research interest as it applies to non-tumorous diseases, such as insulin resistance (IR) and diabetic nephropathy (DN). DN is characterized by renal tubulointerstitial fibrosis (TIF) and epithelial-mesenchymal transition (EMT), and PTEN plays a significant role in the regulation of both. Epigenetics and microRNAs (miRNAs) are novel players in post-transcriptional regulation and research evidence demonstrates that they reduce the expression of PTEN by acting as key regulators of autophagy and TIF through activation of the Akt/mammalian target of rapamycin (mTOR) signaling pathway. These regulatory processes might play an important role in solving the complexities of DN pathogenesis and IR, as well as the therapeutic management of DN with the help of PTEN K27-linked polyubiquitination. Currently, there are no comprehensive reviews citing the role PTEN plays in the development of DN and its regulation via miRNA and epigenetic modifications. The present review explores these facets of PTEN in the pathogenesis of IR and DN.
Collapse
Affiliation(s)
- Manoj Khokhar
- Department of Biochemistry, All India Institute of Medical Sciences, Jodhpur, India
| | - Dipayan Roy
- Department of Biochemistry, All India Institute of Medical Sciences, Jodhpur, India
| | - Anupama Modi
- Department of Biochemistry, All India Institute of Medical Sciences, Jodhpur, India
| | - Riddhi Agarwal
- Department of Biochemistry, All India Institute of Medical Sciences, Jodhpur, India
| | - Dharmveer Yadav
- Department of Biochemistry, All India Institute of Medical Sciences, Jodhpur, India
| | - Purvi Purohit
- Department of Biochemistry, All India Institute of Medical Sciences, Jodhpur, India
| | - Praveen Sharma
- Department of Biochemistry, All India Institute of Medical Sciences, Jodhpur, India
| |
Collapse
|
61
|
Zahm AM, Wang AW, Wang YJ, Schug J, Wangensteen KJ, Kaestner KH. A High-Content Screen Identifies MicroRNAs That Regulate Liver Repopulation After Injury in Mice. Gastroenterology 2020; 158:1044-1057.e17. [PMID: 31759059 PMCID: PMC7472793 DOI: 10.1053/j.gastro.2019.11.025] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 10/18/2019] [Accepted: 11/11/2019] [Indexed: 02/08/2023]
Abstract
BACKGROUND & AIMS Liver regeneration is impaired in mice with hepatocyte-specific deficiencies in microRNA (miRNA) processing, but it is not clear which miRNAs regulate this process. We developed a high-throughput screen to identify miRNAs that regulate hepatocyte repopulation after toxic liver injury using fumarylacetoacetate hydrolase-deficient mice. METHODS We constructed plasmid pools encoding more than 30,000 tough decoy miRNA inhibitors (hairpin nucleic acids designed to specifically inhibit interactions between miRNAs and their targets) to target hepatocyte miRNAs in a pairwise manner. The plasmid libraries were delivered to hepatocytes in fumarylacetoacetate hydrolase-deficient mice at the time of liver injury via hydrodynamic tail-vein injection. Integrated transgene-containing transposons were quantified after liver repopulation via high-throughput sequencing. Changes in polysome-bound transcripts after miRNA inhibition were determined using translating ribosome affinity purification followed by high-throughput sequencing. RESULTS Analyses of tough decoy abundance in hepatocyte genomic DNA and input plasmid pools identified several thousand miRNA inhibitors that were significantly depleted or increased after repopulation. We classified a subset of miRNA binding sites as those that have strong effects on liver repopulation, implicating the targeted hepatocyte miRNAs as regulators of this process. We then generated a high-content map of pairwise interactions between 171 miRNA-binding sites and identified synergistic and redundant effects. CONCLUSIONS We developed a screen to identify miRNAs that regulate liver repopulation after injury in live mice.
Collapse
Affiliation(s)
| | | | - Yue J Wang
- Department of Biomedical Sciences, Florida State University, Tallahassee, Florida
| | - Jonathan Schug
- Department of Genetics, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Kirk J Wangensteen
- Department of Genetics, University of Pennsylvania, Philadelphia, Pennsylvania.
| | - Klaus H Kaestner
- Department of Genetics, University of Pennsylvania, Philadelphia, Pennsylvania.
| |
Collapse
|
62
|
Huang WJ, Liu WJ, Xiao YH, Zheng HJ, Xiao Y, Jia Q, Jiang HX, Zhu ZB, Xia CH, Han XT, Sun RX, Nan H, Feng ZD, Wang SD, Zhao JX. Tripterygium and its extracts for diabetic nephropathy: Efficacy and pharmacological mechanisms. Biomed Pharmacother 2020; 121:109599. [DOI: 10.1016/j.biopha.2019.109599] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 10/21/2019] [Accepted: 10/26/2019] [Indexed: 01/04/2023] Open
|
63
|
|
64
|
Samodelov SL, Gai Z, Kullak-Ublick GA, Visentin M. Renal Reabsorption of Folates: Pharmacological and Toxicological Snapshots. Nutrients 2019; 11:nu11102353. [PMID: 31581752 PMCID: PMC6836044 DOI: 10.3390/nu11102353] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 09/24/2019] [Accepted: 09/26/2019] [Indexed: 01/16/2023] Open
Abstract
Folates are water-soluble B9 vitamins that serve as one-carbon donors in the de novo synthesis of thymidylate and purines, and in the conversion of homocysteine to methionine. Due to their key roles in nucleic acid synthesis and in DNA methylation, inhibiting the folate pathway is still one of the most efficient approaches for the treatment of several tumors. Methotrexate and pemetrexed are the most prescribed antifolates and are mainly used in the treatment of acute myeloid leukemia, osteosarcoma, and lung cancers. Normal levels of folates in the blood are maintained not only by proper dietary intake and intestinal absorption, but also by an efficient renal reabsorption that seems to be primarily mediated by the glycosylphosphatidylinositol- (GPI) anchored protein folate receptor α (FRα), which is highly expressed at the brush-border membrane of proximal tubule cells. Folate deficiency due to malnutrition, impaired intestinal absorption or increased urinary elimination is associated with severe hematological and neurological deficits. This review describes the role of the kidneys in folate homeostasis, the molecular basis of folate handling by the kidneys, and the use of high dose folic acid as a model of acute kidney injury. Finally, we provide an overview on the development of folate-based compounds and their possible therapeutic potential and toxicological ramifications.
Collapse
Affiliation(s)
- Sophia L Samodelov
- Department of Clinical Pharmacology and Toxicology, University Hospital Zurich, University of Zurich, 8006 Zurich, Switzerland.
| | - Zhibo Gai
- Department of Clinical Pharmacology and Toxicology, University Hospital Zurich, University of Zurich, 8006 Zurich, Switzerland.
| | - Gerd A Kullak-Ublick
- Department of Clinical Pharmacology and Toxicology, University Hospital Zurich, University of Zurich, 8006 Zurich, Switzerland.
- Mechanistic Safety, CMO & Patient Safety, Global Drug Development, Novartis Pharma, 4056 Basel, Switzerland.
| | - Michele Visentin
- Department of Clinical Pharmacology and Toxicology, University Hospital Zurich, University of Zurich, 8006 Zurich, Switzerland.
| |
Collapse
|
65
|
Balakumar P, Sambathkumar R, Mahadevan N, Muhsinah AB, Alsayari A, Venkateswaramurthy N, Jagadeesh G. A potential role of the renin-angiotensin-aldosterone system in epithelial-to-mesenchymal transition-induced renal abnormalities: Mechanisms and therapeutic implications. Pharmacol Res 2019; 146:104314. [PMID: 31229564 DOI: 10.1016/j.phrs.2019.104314] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 06/12/2019] [Accepted: 06/13/2019] [Indexed: 12/14/2022]
Abstract
Epithelial-to-mesenchymal transition (EMT) is an orchestrated event where epithelial cells progressively undergo biochemical changes and transition into mesenchymal-like cells by gradually losing their epithelial characteristics. EMT plays a crucial pathologic role in renal abnormalities, especially renal fibrosis. A number of bench studies suggest the potential involvement of renin-angiotensin-aldosterone system (RAAS) in renal EMT process and associated renal abnormalities. EMT appears to be an important pathologic mechanism for the deleterious renal effects of angiotensin II and aldosterone, the two major RAAS components. Mechanistically, the renal RAAS-TGF-β-Smad3 signalling pathway plays an important pathologic role in EMT-associated renal abnormalities. Intriguingly, the RAAS antagonists such as losartan, telmisartan, eplerenone, and spironolactone have the potential to prevent renal EMT in bench studies. This review describes the key mechanistic role of RAAS overactivation in EMT-induced renal abnormalities. Moreover, drugs interrupting the RAAS at different levels in the cascade ameliorating the EMT-associated renal abnormalities are described.
Collapse
Affiliation(s)
| | | | - Nanjaian Mahadevan
- College of Pharmacy, King Khalid University, Guraiger, Abha 62529, Kingdom of Saudi Arabia
| | | | - Abdulrhman Alsayari
- College of Pharmacy, King Khalid University, Guraiger, Abha 62529, Kingdom of Saudi Arabia
| | | | - Gowraganahalli Jagadeesh
- Division of Cardiovascular and Renal Products, Center for Drug Evaluation and Research, US Food and Drug Administration (FDA), Silver Spring, MD 20993, USA.
| |
Collapse
|