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Wan S, Xie X, Yang G, Feng F. Discovery of the toxicity-related quality markers and mechanisms of Zhi-Zi-Hou-Po decoction based on Chinmedomics combined with differentially absorbed components and network pharmacology. JOURNAL OF ETHNOPHARMACOLOGY 2024; 320:117408. [PMID: 37972910 DOI: 10.1016/j.jep.2023.117408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Revised: 11/02/2023] [Accepted: 11/07/2023] [Indexed: 11/19/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Zhi-Zi-Hou-Po decoction (ZZHPD), as a representative traditional Chinese medicine (TCM) formula for the treatment of depression, has frequently triggered hepatorenal toxicity in recent years. However, its toxic effect, material basis, and underlying mechanisms have not been fully elucidated. AIM OF THE STUDY To explore the hepatorenal toxicity-material basis-quality markers (Q-markers) and multiple mechanisms of ZZHPD. MATERIALS AND METHODS ZZHPD-induced rat model of toxicity was evaluated by behavioral indicators, biochemical parameters, and histopathological sections. Then, UHPLC-Q-Exactive Orbitrap-MS combined with multivariate data analysis was utilized to identify the endogenous differential metabolites and the prototype components of ZZHPD in the plasma. A comprehensive strategy integrating in-house library, diagnostic ions, Compound Discover software, and network databases was constructed to identify the chemical constituents of ZZHPD. Additionally, the differentially absorbed components of ZZHPD were screened out based on the spectrum-effect relationship (toxic state and normal state), feature extraction of exogenous components, and variable influence on projection (VIP). Further, Chinmedomics and network pharmacology oriented by differentially absorbed components were performed to predict toxicity-related Q-markers and core targets, as well as relevant pathways. Finally, the binding ability between components and targets was predicted using molecular docking, and the mRNA expression of core target genes was determined by real-time qPCR experiment. RESULTS ZZHPD exerted significant hepatotoxicity and nephrotoxicity in rats accompanied by body weight loss, abnormal biochemical indicators, and pathologic characteristics with mild inflammation and cell damage. The results of plasma metabolomics indicated that 22 differential metabolites interfered by ZZHPD mainly involved in primary bile acid biosynthesis, arginine and proline metabolism, phenylalanine metabolism and biosynthesis, sphingolipid metabolism, pyrimidine and purine metabolism. Firstly, 106 chemical substances of ZZHPD were identified, 44 of them were absorbed into the blood, mainly including 7 iridoid glycosides, 15 flavonoids, 5 lignans, and others. Then, the correlation analysis results suggested that 12 of 19 differentially absorbed constituents were highly correlated with 22 differential metabolites and recognized as potential Q-markers. Finally, 9 toxicity-related Q-markers were predicted and confirmed with better binding ability to 5 core targets (PTGS2, CASP3, TNF, PPARG, HMOX1), including 3 flavonoids (naringin, hesperidin, and neohesperidin), 2 iridoid glycosides (geniposide and genipin-1-β-D-gentiobioside), 2 lignans (honokiol and magnolol), organic acid (chlorogenic acid), and crocin (crocetin). The real-time qPCR results showed that the mRNA levels of CASP3, TNF-α, and PPARG significantly increased in the damaged liver. Combining metabolomics and network pharmacology results, the multiple mechanisms of toxicity might involve in oxidative damage, inflammation, and apoptosis pathways. CONCLUSION Taken together, the toxicity-related Q-markers of ZZHPD screened for the first time in this work were reliable, and the holistic intervention for hepatorenal toxicity further revealed the multi-component, multi-target, and multi-pathway features in TCM. The integrated approach provides a novel perspective for the discovery of toxicity/efficacy-related substances and mechanistic studies in TCM.
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Affiliation(s)
- Shulin Wan
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing 210009, China.
| | - Xiaoxia Xie
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing 210009, China.
| | - Gongjun Yang
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing 210009, China; Key Laboratory of Drug Quality Control and Pharmacovigilance (China Pharmaceutical University), Ministry of Education, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China.
| | - Fang Feng
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing 210009, China; Key Laboratory of Drug Quality Control and Pharmacovigilance (China Pharmaceutical University), Ministry of Education, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China.
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Ilha M, Meira Martins LA, da Silveira Moraes K, Dias CK, Thomé MP, Petry F, Rohden F, Borojevic R, Trindade VMT, Klamt F, Barbé‐Tuana F, Lenz G, Guma FCR. Caveolin-1 influences mitochondrial plasticity and function in hepatic stellate cell activation. Cell Biol Int 2022; 46:1787-1800. [PMID: 35971753 PMCID: PMC9804617 DOI: 10.1002/cbin.11876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Revised: 03/21/2022] [Accepted: 05/26/2022] [Indexed: 01/05/2023]
Abstract
Caveolin-1 (Cav-1) is an integral membrane protein present in all organelles, responsible for regulating and integrating multiple signals as a platform. Mitochondria are extremely adaptable to external cues in chronic liver diseases, and expression of Cav-1 may affect mitochondrial flexibility in hepatic stellate cells (HSCs) activation. We previously demonstrated that exogenous expression of Cav-1 was sufficient to increase some classical markers of activation in HSCs. Here, we aimed to evaluate the influence of exogenous expression and knockdown of Cav-1 on regulating the mitochondrial plasticity, metabolism, endoplasmic reticulum (ER)-mitochondria distance, and lysosomal activity in HSCs. To characterize the mitochondrial, lysosomal morphology, and ER-mitochondria distance, we perform transmission electron microscope analysis. We accessed mitochondria and lysosomal networks and functions through a confocal microscope and flow cytometry. The expression of mitochondrial machinery fusion/fission genes was examined by real-time polymerase chain reaction. Total and mitochondrial cholesterol content was measured using Amplex Red. To define energy metabolism, we used the Oroboros system in the cells. We report that GRX cells with exogenous expression or knockdown of Cav-1 changed mitochondrial morphometric parameters, OXPHOS metabolism, ER-mitochondria distance, lysosomal activity, and may change the activation state of HSC. This study highlights that Cav-1 may modulate mitochondrial function and structural reorganization in HSC activation, being a potential candidate marker for chronic liver diseases and a molecular target for therapeutic intervention.
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Affiliation(s)
- Mariana Ilha
- Programa de Pós‐Graduação em Ciências Biológicas‐Bioquímica, Instituto de Ciências Básicas da SaúdeUniversidade Federal do Rio Grande do Sul – UFRGSPorto AlegreRio Grande do SulBrasil,Department of Clinical Nutrition, Institute of Public Health and Clinical NutritionUniversity of Eastern FinlandKuopioFinland
| | - Leo A. Meira Martins
- Programa de Pós‐Graduação em Ciências Biológicas‐Bioquímica, Instituto de Ciências Básicas da SaúdeUniversidade Federal do Rio Grande do Sul – UFRGSPorto AlegreRio Grande do SulBrasil,Departamento de Fisiologia, Instituto de Ciências Básicas da SaúdeUniversidade Federal do Rio Grande do Sul ‐ UFRGSPorto AlegreRio Grande do SulBrasil
| | - Ketlen da Silveira Moraes
- Departamento de Bioquímica, Instituto de Ciências Básicas da SaúdeUniversidade Federal do Rio Grande do Sul ‐ UFRGSPorto AlegreRio Grande do SulBrasil
| | - Camila K. Dias
- Programa de Pós‐Graduação em Ciências Biológicas‐Bioquímica, Instituto de Ciências Básicas da SaúdeUniversidade Federal do Rio Grande do Sul – UFRGSPorto AlegreRio Grande do SulBrasil
| | - Marcos P. Thomé
- Departamento de Biofísica e Centro de BiotecnologiaUniversidade Federal do Rio Grande do Sul ‐ UFRGSPorto AlegreRio Grande do SulBrasil
| | - Fernanda Petry
- Programa de Pós‐Graduação em Ciências Biológicas‐Bioquímica, Instituto de Ciências Básicas da SaúdeUniversidade Federal do Rio Grande do Sul – UFRGSPorto AlegreRio Grande do SulBrasil
| | - Francieli Rohden
- Programa de Pós‐Graduação em Ciências Biológicas‐Bioquímica, Instituto de Ciências Básicas da SaúdeUniversidade Federal do Rio Grande do Sul – UFRGSPorto AlegreRio Grande do SulBrasil
| | - Radovan Borojevic
- Centro de Medicina RegenerativaFaculdade Arthur Sa Earp Neto ‐ Faculdade de Medicina de PetrópolisRio de JaneiroBrasil
| | - Vera M. T. Trindade
- Departamento de Bioquímica, Instituto de Ciências Básicas da SaúdeUniversidade Federal do Rio Grande do Sul ‐ UFRGSPorto AlegreRio Grande do SulBrasil
| | - Fábio Klamt
- Departamento de Bioquímica, Instituto de Ciências Básicas da SaúdeUniversidade Federal do Rio Grande do Sul ‐ UFRGSPorto AlegreRio Grande do SulBrasil
| | - Florência Barbé‐Tuana
- Programa de Pós‐Graduação em Biologia Celular e MolecularEscola de Ciências da Pontifícia Universidade Católica do Rio Grande do Sul‐ PUCRSPorto AlegreRio Grande do SulBrasil
| | - Guido Lenz
- Departamento de Biofísica e Centro de BiotecnologiaUniversidade Federal do Rio Grande do Sul ‐ UFRGSPorto AlegreRio Grande do SulBrasil
| | - Fátima C. R. Guma
- Departamento de Bioquímica, Instituto de Ciências Básicas da SaúdeUniversidade Federal do Rio Grande do Sul ‐ UFRGSPorto AlegreRio Grande do SulBrasil,Centro de Microscopia e MicroanáliseUniversidade Federal do Rio Grande do Sul ‐ UFRGSPorto AlegreRio Grande do SulBrasil
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Gao J, Yang J, Yu W, Hao R, Fan J, Wei J. Gooseberry anthocyanins protect mice hepatic fibrosis by inhibiting TGF-β/Smad pathway. FOOD BIOSCI 2020. [DOI: 10.1016/j.fbio.2020.100717] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Karvar S, Ansa-Addo EA, Suda J, Singh S, Zhu L, Li Z, Rockey DC. Moesin, an Ezrin/Radixin/Moesin Family Member, Regulates Hepatic Fibrosis. Hepatology 2020; 72:1073-1084. [PMID: 31860744 PMCID: PMC7437180 DOI: 10.1002/hep.31078] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Accepted: 12/06/2019] [Indexed: 12/12/2022]
Abstract
BACKGROUND AND AIMS Moesin, an ezrin/radixin/moesin family member, is involved in the regulation of cell adhesion, polarity, and migration by cross-linking between the actin cytoskeleton and plasma membrane. The primary effector cell in hepatic fibrosis is the hepatic stellate cell (HSC), which undergoes activation during liver injury leading to increased extracellular matrix production. APPROACH AND RESULTS Here, we have hypothesized that moesin plays a critical role in linking the HSC cytoskeleton to the fibrogenic cascade during HSC activation. Moesin phosphorylation was up-regulated during HSC activation and fibrogenesis. Using moesin wild-type (WT) and mutant constructs (phosphomimicking T558D and nonphosphorylatable T558A), we found that cellular motility and contraction were increased in moesin WT-infected and T558D-infected cells, paralleled by an increase in smooth muscle α-actin and collagen 1 expression. In contrast, overexpression of nonphosphorylatable moesin and moesin knockout (KO) decreased cellular motility and contraction. Most importantly, moesin KO led to abrogation of liver fibrosis. The mechanism of moesin's effect was a reduction in myocardin-related transcription factor-A and serum-response factor (SRF)-mediated changes in the actin cytoskeleton, which in turn modulated the expression of matrix genes. CONCLUSIONS Taken together, our findings suggest that the linkage between cytoskeletal dynamics and the correlated MRTF/SRF signaling pathway has a pivotal role in HSC activation and fibrogenesis.
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Affiliation(s)
- Serhan Karvar
- Division of Gastroenterology and Hepatology, Department of
Medicine, Medical University of South Carolina, Charleston, SC, USA
| | | | - Jo Suda
- Department of Biomedical Sciences, Cedars-Sinai Medical
Center, Los Angeles, CA
| | | | - Lixin Zhu
- Guangdong Institute of Gastroenterology, Guangdong
Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, Department of
Colorectal Surgery, the Sixth Affiliated Hospital, Sun Yat-sen University,
Guangzhou, China. Department of Biochemistry and Department of Pediatrics,
University at Buffalo, Buffalo, NY
| | - Zihai Li
- Department of Microbiology and Immunology, Hollings Cancer
Center
| | - Don C. Rockey
- Division of Gastroenterology and Hepatology, Department of
Medicine, Medical University of South Carolina, Charleston, SC, USA
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Effect of Curcumol on the Fenestrae of Liver Sinusoidal Endothelial Cells Based on NF- κB Signaling Pathway. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2020; 2020:8590638. [PMID: 32595742 PMCID: PMC7275224 DOI: 10.1155/2020/8590638] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 03/23/2020] [Accepted: 04/08/2020] [Indexed: 12/24/2022]
Abstract
Objective To study the effect of curcumol on liver sinusoidal endothelial cells (LSECs) and to analyze the mechanism of antihepatic fibrosis. Methods The effects of drug intervention on cell proliferation rates were detected by MTT assay. The expression of NF-κB was detected by RT-PCR and WB. The NF-κB expression and entry into the nucleus were detected by immunofluorescence; scanning electron microscopy was used to observe the changes of LSECs fenestrae. Results MTT results showed that the interference of cell proliferation in each group was small. RT-PCR showed that the expression of NF-κB in the curcumol intervention group was significantly lower than that in the positive control group (P < 0.05). The WB detection found that, in the curcumol intervention group, the expression of pNF-κB in the NF-κB signaling pathway was significantly lower than that in the positive control group (P < 0.05). Scanning electron microscopy showed that the LSEC fenestrae were significantly improved compared with the positive control group. Conclusion Curcumol may be one of the mechanisms of antihepatic fibrosis by inhibiting the activity of the NF-κB signaling pathway and increasing the fenestrae of LSECs.
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Abstract
Endothelial cell nitric oxide (NO) synthase (eNOS), the enzyme responsible for synthesis of NO in endothelial cells, is regulated by complex posttranslational mechanisms. Sinusoidal portal hypertension, a disorder characterized by liver sinusoidal endothelial cell (SEC) injury with resultant reduced eNOS activity and NO production within the liver, has been associated with defects in eNOS protein-protein interactions and posttranslational modifications. We and others have previously identified novel eNOS interactors, including G protein-coupled receptor (GPCR) kinase interactor 1 (GIT1), which we found to play an unexpected stimulatory role in GPCR-mediated eNOS signaling. Here we report that β-arrestin 2 (β-Arr2), a canonical GPCR signaling partner, localizes in SECs with eNOS in a GIT1/eNOS/NO signaling module. Most importantly, we show that β-Arr2 stimulates eNOS activity, and that β-Arr2 expression is reduced and formation of the GIT1/eNOS/NO signaling module is interrupted during liver injury. In β-Arr2-deficient mice, bile duct ligation injury (BDL) led to significantly reduced eNOS activity and to a dramatic increase in portal hypertension compared to BDL in wild-type mice. Overexpression of β-Arr2 in injured or β-Arr2-deficient SECs rescued eNOS function by increasing eNOS complex formation and NO production. We also found that β-Arr2-mediated GIT1/eNOS complex formation is dependent on Erk1/2 and Src, two kinases known to interact with and be activated by β-Arr2 in response to GCPR activation. Our data emphasize that β-Arr2 is an integral component of the GIT1/eNOS/NO signaling pathway and have implications for the pathogenesis of sinusoidal portal hypertension.
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7
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Liu X, Rosenthal SB, Meshgin N, Baglieri J, Musallam SG, Diggle K, Lam K, Wu R, Pan SQ, Chen Y, Dorko K, Presnell S, Benner C, Hosseini M, Tsukamoto H, Brenner D, Kisseleva T. Primary Alcohol-Activated Human and Mouse Hepatic Stellate Cells Share Similarities in Gene-Expression Profiles. Hepatol Commun 2020; 4:606-626. [PMID: 32258954 PMCID: PMC7109347 DOI: 10.1002/hep4.1483] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Accepted: 12/15/2019] [Indexed: 01/18/2023] Open
Abstract
Alcoholic liver disease (ALD) is a leading cause of cirrhosis in the United States, which is characterized by extensive deposition of extracellular matrix proteins and formation of a fibrous scar. Hepatic stellate cells (HSCs) are the major source of collagen type 1 producing myofibroblasts in ALD fibrosis. However, the mechanism of alcohol-induced activation of human and mouse HSCs is not fully understood. We compared the gene-expression profiles of primary cultured human HSCs (hHSCs) isolated from patients with ALD (n = 3) or without underlying liver disease (n = 4) using RNA-sequencing analysis. Furthermore, the gene-expression profile of ALD hHSCs was compared with that of alcohol-activated mHSCs (isolated from intragastric alcohol-fed mice) or CCl4-activated mouse HSCs (mHSCs). Comparative transcriptome analysis revealed that ALD hHSCs, in addition to alcohol-activated and CCl4-activated mHSCs, share the expression of common HSC activation (Col1a1 [collagen type I alpha 1 chain], Acta1 [actin alpha 1, skeletal muscle], PAI1 [plasminogen activator inhibitor-1], TIMP1 [tissue inhibitor of metalloproteinase 1], and LOXL2 [lysyl oxidase homolog 2]), indicating that a common mechanism underlies the activation of human and mouse HSCs. Furthermore, alcohol-activated mHSCs most closely recapitulate the gene-expression profile of ALD hHSCs. We identified the genes that are similarly and uniquely up-regulated in primary cultured alcohol-activated hHSCs and freshly isolated mHSCs, which include CSF1R (macrophage colony-stimulating factor 1 receptor), PLEK (pleckstrin), LAPTM5 (lysosmal-associated transmembrane protein 5), CD74 (class I transactivator, the invariant chain), CD53, MMP9 (matrix metallopeptidase 9), CD14, CTSS (cathepsin S), TYROBP (TYRO protein tyrosine kinase-binding protein), and ITGB2 (integrin beta-2), and other genes (compared with CCl4-activated mHSCs). Conclusion: We identified genes in alcohol-activated mHSCs from intragastric alcohol-fed mice that are largely consistent with the gene-expression profile of primary cultured hHSCs from patients with ALD. These genes are unique to alcohol-induced HSC activation in two species, and therefore may become targets or readout for antifibrotic therapy in experimental models of ALD.
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Affiliation(s)
- Xiao Liu
- Department of Surgery University of California, San Diego La Jolla CA.,Department of Medicine University of California, San Diego La Jolla CA
| | - Sara Brin Rosenthal
- Center for Computational Biology & Bioinformatics University of California, San Diego La Jolla CA
| | - Nairika Meshgin
- Department of Surgery University of California, San Diego La Jolla CA.,Department of Medicine University of California, San Diego La Jolla CA
| | - Jacopo Baglieri
- Department of Surgery University of California, San Diego La Jolla CA.,Department of Medicine University of California, San Diego La Jolla CA
| | - Sami G Musallam
- Department of Surgery University of California, San Diego La Jolla CA
| | - Karin Diggle
- Department of Medicine University of California, San Diego La Jolla CA
| | - Kevin Lam
- Department of Medicine University of California, San Diego La Jolla CA
| | - Raymond Wu
- Southern California Research Center for ALPD & Cirrhosis Keck School of Medicine of the University of Southern California Los Angeles CA.,Department of Pathology Keck School of Medicine of the University of Southern California Los Angeles CA
| | - Stephanie Q Pan
- Southern California Research Center for ALPD & Cirrhosis Keck School of Medicine of the University of Southern California Los Angeles CA.,Department of Pathology Keck School of Medicine of the University of Southern California Los Angeles CA
| | - Yibu Chen
- Bioinformatics Services Keck School of Medicine of the University of Southern California Los Angeles CA
| | | | | | - Chris Benner
- Department of Medicine University of California, San Diego La Jolla CA
| | - Mojgan Hosseini
- Department of Pathology University of California, San Diego La Jolla CA
| | - Hidekazu Tsukamoto
- Southern California Research Center for ALPD & Cirrhosis Keck School of Medicine of the University of Southern California Los Angeles CA.,Department of Pathology Keck School of Medicine of the University of Southern California Los Angeles CA.,Department of Veterans Affairs Great Los Angeles Healthcare System Los Angeles CA
| | - David Brenner
- Department of Medicine University of California, San Diego La Jolla CA.,Southern California Research Center for ALPD & Cirrhosis Keck School of Medicine of the University of Southern California Los Angeles CA
| | - Tatiana Kisseleva
- Department of Surgery University of California, San Diego La Jolla CA.,Southern California Research Center for ALPD & Cirrhosis Keck School of Medicine of the University of Southern California Los Angeles CA
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Ilha M, Moraes KDS, Rohden F, Martins LAM, Borojevic R, Lenz G, Barbé‐Tuana F, Guma FCR. Exogenous expression of caveolin‐1 is sufficient for hepatic stellate cell activation. J Cell Biochem 2019; 120:19031-19043. [DOI: 10.1002/jcb.29226] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Accepted: 06/04/2019] [Indexed: 12/18/2022]
Affiliation(s)
- Mariana Ilha
- Programa de Pós‐Graduação em Ciências Biológicas‐ Bioquímica, Instituto de Ciências Básicas da SaúdeUniversidade Federal do Rio Grande do Sul – UFRGSPorto Alegre RS Brazil
| | - Ketlen da Silveira Moraes
- Programa de Pós‐Graduação em Ciências Biológicas‐ Bioquímica, Instituto de Ciências Básicas da SaúdeUniversidade Federal do Rio Grande do Sul – UFRGSPorto Alegre RS Brazil
| | - Francieli Rohden
- Programa de Pós‐Graduação em Ciências Biológicas‐ Bioquímica, Instituto de Ciências Básicas da SaúdeUniversidade Federal do Rio Grande do Sul – UFRGSPorto Alegre RS Brazil
| | - Leo Anderson Meira Martins
- Programa de Pós‐Graduação em Ciências Biológicas‐ Bioquímica, Instituto de Ciências Básicas da SaúdeUniversidade Federal do Rio Grande do Sul – UFRGSPorto Alegre RS Brazil
| | - Radovan Borojevic
- Centro de Medicina RegenerativaFaculdade de Medicina de Petrópolis – FMPPetrópolis RJ Brazil
| | - Guido Lenz
- Departamento de Biofísica e Centro de BiotecnologiaUniversidade Federal do Rio Grande do Sul ‐ UFRGSPorto Alegre RS Brazil
| | - Florencia Barbé‐Tuana
- Programa de Pós‐Graduação em Ciências Biológicas‐ Bioquímica, Instituto de Ciências Básicas da SaúdeUniversidade Federal do Rio Grande do Sul – UFRGSPorto Alegre RS Brazil
- Programa de Pós‐Graduação em Biologia Celular e MolecularEscola de Ciências da Pontifícia Universidade Católica do Rio Grande do Sul‐ PUCRSPorto Alegre RS Brazil
| | - Fátima Costa Rodrigues Guma
- Programa de Pós‐Graduação em Ciências Biológicas‐ Bioquímica, Instituto de Ciências Básicas da SaúdeUniversidade Federal do Rio Grande do Sul – UFRGSPorto Alegre RS Brazil
- Centro de Microscopia e MicroanáliseUniversidade Federal do Rio Grande do Sul ‐ UFRGSPorto Alegre RS Brazil
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Yokomori H, Ando W, Oda M. Cavin-1 is linked to lipid droplet formation in human hepatic stellate cells. Med Mol Morphol 2019; 53:56-59. [PMID: 30877476 DOI: 10.1007/s00795-019-00219-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Accepted: 03/11/2019] [Indexed: 12/14/2022]
Affiliation(s)
- Hiroaki Yokomori
- Department of Internal Medicine, Kitasato University Medical Center, Saitama, 364-8501, Japan.
| | - Wataru Ando
- Department of Clinical Pharmacy, School of Pharmacy, Kitasato University, Tokyo, Japan
| | - Masaya Oda
- Organized Center of Clinical Medicine, International University of Health and Welfare, Tokyo, Japan
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Yokomori H, Ando W, Oda M. Caveolin-1 is related to lipid droplet formation in hepatic stellate cells in human liver. Acta Histochem 2019; 121:113-118. [PMID: 30446170 DOI: 10.1016/j.acthis.2018.10.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2018] [Revised: 10/19/2018] [Accepted: 10/19/2018] [Indexed: 11/30/2022]
Abstract
Caveolins (CAVs) regulate intracellular cholesterol transport by a complex process involving caveolae, endoplasmic reticulum (ER), and the Golgi network. Hepatic stellate cells (HSCs) are the central site for retinoid storage in the liver and indeed the entire body. Herein, we attempted to elucidate the ultrastructural localization and expression of caveolin-1 (CAV-1) in human HSCs during the progression of liver cirrhosis (LC). Normal and hepatitis C-related cirrhotic liver samples were prepared using a modified perfusion-fixation method to fix organelle structures and molecules in their in vivo positions, and examined using immunoelectron microscopy. In control liver specimens, CAV-1 was minimally associated with low electron density lipid droplets (LDs) segregated around zones 1-2, and specifically associated with membranes surrounding LDs. CAV-1 was segregated in high-density LDs, consistent with the formation of membrane-enclosed lipid-rich vesicular structures, as well as caveolae on plasma membranes around zones 2-3. In cirrhotic liver specimens, CAV-1 molecules were inserted into the cytoplasmic leaflets of ER membranes for transportation to LDs. Thus, CAV-1 transport to LDs might represent an intracellular pathway from the ER in cirrhotic liver tissue.
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Affiliation(s)
- Hiroaki Yokomori
- Department of Internal Medicine, Kitasato University Medical Center, Saitama, Japan.
| | - Wataru Ando
- Department of Clinical Pharmacy, School of Pharmacy, Kitasato University, Tokyo, Japan
| | - Masaya Oda
- Organized Center of Clinical Medicine, Sanno Medical Center, International University of Health and Welfare, Tokyo, Japan
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Liu S, Premont RT, Singh S, Rockey DC. Caveolin 1 and G-Protein-Coupled Receptor Kinase-2 Coregulate Endothelial Nitric Oxide Synthase Activity in Sinusoidal Endothelial Cells. THE AMERICAN JOURNAL OF PATHOLOGY 2017; 187:896-907. [PMID: 28162981 DOI: 10.1016/j.ajpath.2016.11.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2016] [Revised: 11/23/2016] [Accepted: 11/28/2016] [Indexed: 12/14/2022]
Abstract
Liver injury leads to a vasculopathy in which post-translational modifications of endothelial nitric oxide synthase (eNOS) lead to impaired nitric oxide synthesis. We hypothesized that caveolin 1 (CAV1), a well-known eNOS interactor, regulates eNOS activity in sinusoidal endothelial cells (SECs) via its interaction with G-protein-coupled receptor kinase-2 (GRK2) that also post-translationally modifies eNOS. Liver injury with portal hypertension was established using bile duct ligation in rats. CAV1 function was modified using a CAV1 scaffolding domain construct and cDNAs encoding wild-type CAV1, and CAV1 phosphorylation was increased in injured SECs, resulting in increased GRK2-CAV1 interaction and decreased eNOS activity. In injured SECs, endothelin-1 blocked CAV1 phosphorylation induced by CAV1 scaffolding domain, indicating that CAV1 interaction with GRK2 is inversely regulated by endothelin-1 and CAV1 scaffolding domain after liver injury. In addition, after transduction with DNA encoding wild-type CAV1 into SECs isolated from Cav1-deficient mice, GRK2 association with CAV1 was evident, whereas transduction with a dominant negative CAV1 mutated at tyrosine 14 reduced the interaction. Finally, isoproterenol-induced GRK2 phosphorylation enhanced CAV1-GRK2 interaction and reduced eNOS activity. Our data suggest a novel mechanism and model in which CAV1 phosphorylation facilitates CAV1 scaffolding and GRK2-CAV1 interaction, thus clustering eNOS within a complex that inhibits eNOS activity. This process takes place in injured, but not in normal, SECs.
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Affiliation(s)
- Songling Liu
- Department of Medicine, Medical University of South Carolina, Charleston, South Carolina
| | - Richard T Premont
- Department of Medicine, Duke University Medical Center, Durham, North Carolina
| | - Shweta Singh
- Department of Medicine, Medical University of South Carolina, Charleston, South Carolina
| | - Don C Rockey
- Department of Medicine, Medical University of South Carolina, Charleston, South Carolina.
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