1
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Linder M, Bennink L, Foxton RH, Kirkness M, Westenskow PD. In vivo monitoring of active subretinal fibrosis in mice using collagen hybridizing peptides. Lab Anim (NY) 2024; 53:196-204. [PMID: 39060633 PMCID: PMC11291276 DOI: 10.1038/s41684-024-01408-0] [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: 12/08/2023] [Accepted: 06/19/2024] [Indexed: 07/28/2024]
Abstract
Subretinal fibrosis is associated with worse visual outcomes in patients with neovascular age-related macular degeneration. As there is a lack of optimal biomarkers and no method that directly detects collagen in the back of the eye, novel tools that monitor fibrosis-related changes in neovascular age-related macular degeneration are needed. Here, using two mouse models (the laser-induced choroidal neovascularization model, and the JR5558 mouse presenting with spontaneous subretinal neovascularization with fibrosis), we imaged active fibrotic lesions using fluorescently labeled collagen hybridizing peptides (CHPs), short peptides that bind to single α-chain collagen structures during collagen remodeling. JR5558 retinal pigment epithelium/choroid flat mounts showed CHP co-staining with fibrosis and epithelial mesenchymal transition-related markers; additionally, CHP histopathology staining correlated with in vivo CHP imaging. After laser-induced choroidal neovascularization, in vivo CHP binding correlated with laser intensity, histopathology CHP and fibronectin staining. Laser-induced choroidal neovascularization showed decreased CHP intensity over time in healing/regressing versus active scars in vivo, whereas increased CHP binding correlated with elevated fibrosis in JR5558 mouse eyes with age. In bispecific angiopoietin 2/vascular endothelial growth factor antibody-treated JR5558 mice, CHPs detected significantly decreased collagen remodeling versus immunoglobulin G control. These results demonstrate the first use of CHPs to directly image remodeling collagen in the eye and as a potential clinical optical biomarker of active subretinal fibrosis associated with ocular neovascularization.
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Affiliation(s)
- Markus Linder
- Roche Pharma Research and Early Development, Roche Innovation Center, F. Hoffmann-La Roche AG, Basel, Switzerland
- Novartis Institutes for BioMedical Research, Basel, Switzerland
| | | | - Richard H Foxton
- Roche Pharma Research and Early Development, Roche Innovation Center, F. Hoffmann-La Roche AG, Basel, Switzerland
| | | | - Peter D Westenskow
- Roche Pharma Research and Early Development, Roche Innovation Center, F. Hoffmann-La Roche AG, Basel, Switzerland.
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2
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Deh K, Zhang G, Park AH, Cunningham CH, Bragagnolo ND, Lyashchenko S, Ahmmed S, Leftin A, Coffee E, Hricak H, Miloushev V, Mayerhoefer M, Keshari KR. First in-human evaluation of [1- 13C]pyruvate in D 2O for hyperpolarized MRI of the brain: A safety and feasibility study. Magn Reson Med 2024; 91:2559-2567. [PMID: 38205934 PMCID: PMC11009889 DOI: 10.1002/mrm.30002] [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: 10/23/2023] [Revised: 12/15/2023] [Accepted: 12/20/2023] [Indexed: 01/12/2024]
Abstract
PURPOSE To investigate the safety and value of hyperpolarized (HP) MRI of [1-13C]pyruvate in healthy volunteers using deuterium oxide (D2O) as a solvent. METHODS Healthy volunteers (n = 5), were injected with HP [1-13C]pyruvate dissolved in D2O and imaged with a metabolite-specific 3D dual-echo dynamic EPI sequence at 3T at one site (Site 1). Volunteers were monitored following the procedure to assess safety. Image characteristics, including SNR, were compared to data acquired in a separate cohort using water as a solvent (n = 5) at another site (Site 2). The apparent spin-lattice relaxation time (T1) of [1-13C]pyruvate was determined both in vitro and in vivo from a mono-exponential fit to the image intensity at each time point of our dynamic data. RESULTS All volunteers completed the study safely and reported no adverse effects. The use of D2O increased the T1 of [1-13C]pyruvate from 66.5 ± 1.6 s to 92.1 ± 5.1 s in vitro, which resulted in an increase in signal by a factor of 1.46 ± 0.03 at the time of injection (90 s after dissolution). The use of D2O also increased the apparent relaxation time of [1-13C]pyruvate by a factor of 1.4 ± 0.2 in vivo. After adjusting for inter-site SNR differences, the use of D2O was shown to increase image SNR by a factor of 2.6 ± 0.2 in humans. CONCLUSIONS HP [1-13C]pyruvate in D2O is safe for human imaging and provides an increase in T1 and SNR that may improve image quality.
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Affiliation(s)
- Kofi Deh
- Radiology, Memorial Sloan Kettering Cancer Center
| | | | - Angela Hijin Park
- Radiochemistry & Imaging Probes Core (RMIP), Memorial Sloan Kettering Cancer Center
| | - Charles H. Cunningham
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario
- Physical Sciences, Sunnybrook Research Institute, Toronto, Ontario
| | | | - Serge Lyashchenko
- Radiochemistry & Imaging Probes Core (RMIP), Memorial Sloan Kettering Cancer Center
| | - Shake Ahmmed
- Radiochemistry & Imaging Probes Core (RMIP), Memorial Sloan Kettering Cancer Center
| | | | | | - Hedvig Hricak
- Radiology, Memorial Sloan Kettering Cancer Center
- Molecular Pharmacology Program, Memorial Sloan Kettering Cancer Center
| | | | | | - Kayvan R. Keshari
- Radiology, Memorial Sloan Kettering Cancer Center
- Molecular Pharmacology Program, Memorial Sloan Kettering Cancer Center
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3
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Musso G, Pinach S, Mariano F, Saba F, De Michieli F, Framarin L, Berrutti M, Paschetta E, Parente R, Lizet Castillo Y, Leone N, Castellino F, Cassader M, Gambino R. Effect of phospholipid curcumin Meriva on liver histology and kidney disease in nonalcoholic steatohepatitis: A randomized, double-blind, placebo-controlled trial. Hepatology 2024:01515467-990000000-00891. [PMID: 38809154 DOI: 10.1097/hep.0000000000000937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 04/14/2024] [Indexed: 05/30/2024]
Abstract
BACKGROUND AND AIMS NASH confers an increased liver-related and kidney morbidity. Phospholipid curcumin (Meriva) is a phospholipid formulation with ameliorated systemic curcumin absorption and delivery. We assessed the safety and efficacy of Meriva in NASH. APPROACH AND RESULTS In this double-blind trial, 52 patients with biopsy-proven NASH (71% with stage ≥F2 fibrosis, 58% with stage A2-G2/A2-G3a chronic kidney disease) were randomized 1:1 to receive Meriva 2 g/d or placebo for 72 weeks. The primary endpoint was NASH resolution with no worsening of fibrosis. The secondary endpoints included a ≥1 stage liver fibrosis improvement with no NASH worsening; regression of significant (ie, stage ≥F2) fibrosis and CKD; and improvement in renal, glucose, lipid, and inflammatory parameters. We also explored the treatment effect on hepatic activation of NF-kB, a key proinflammatory transcription factor and a major target of curcumin. Fifty-one patients (26 on Meriva and 25 on placebo) completed the trial. Sixteen (62%) patients on Meriva versus 3 (12%) patients on placebo had NASH resolution (RR = 5.33 [95% CI = 1.76-12.13]; p = 0.003). Thirteen (50%) patients on Meriva versus 2 (8%) patients on placebo had ≥1 stage fibrosis improvement (RR = 6.50 [1.63-21.20]; p = 0.008). Eleven (42%) patients on Meriva versus 0 (0%) on placebo had regression of significant liver fibrosis (RR = 18.01 [1.43-36.07]; p = 0.02). Hepatic NF-kB inhibition predicted NASH resolution (AUC = 0.90, 95% CI = 0.84-0.95) and fibrosis improvement (AUC = 0.89, 95% CI = 0.82-0.96). Thirteen (50%) patients on Meriva versus 0 (0%) on placebo had chronic kidney disease regression (RR = 10.71 [1.94-17.99)]; p = 0.004). Compared with placebo, Meriva improved eGFR (difference in adjusted eGFR change: +3.59 [2.96-4.11] mL/min/1.73 m 2 /y, p = 0.009), fasting glucose(-17 mg/dL; 95% CI = -22, -12), HbA1c (-0.62%; 95% CI = -0.87%, -0.37%), LDL-C (-39 mg/dL; 95% CI = -45, -33), triglycerides (-36 mg/dL, 95% CI = -46, -26), HDL-C (+10 mg/dL; 95% CI = +8, +11), and inflammatory markers. Adverse events were rare, mild, and evenly distributed. CONCLUSIONS In patients with NASH, Meriva administration for 72 weeks was safe, well-tolerated, and improved liver histology, possibly through NF-kB inhibition, kidney disease, and metabolic profile.
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Affiliation(s)
- Giovanni Musso
- MECAU Department, San Luigi Gonzaga Hospital, Orbassano, Turin, Italy
| | - Silvia Pinach
- Department of Medical Sciences, Città della Salute e della Scienza Hospital, University of Turin, Turin, Italy
| | - Filippo Mariano
- Department of Nephrology, Città della Salute e della Scienza Hospital, University of Turin, Turin, Italy
| | - Francesca Saba
- Department of Medical Sciences, Città della Salute e della Scienza Hospital, University of Turin, Turin, Italy
| | - Franco De Michieli
- Department of Medical Sciences, Città della Salute e della Scienza Hospital, University of Turin, Turin, Italy
| | - Luciana Framarin
- Gastroenterology Unit, HUMANITAS Gradenigo Hospital, Turin, Italy
| | - Mara Berrutti
- Gastroenterology Unit, HUMANITAS Gradenigo Hospital, Turin, Italy
| | - Elena Paschetta
- MECAU Department, HUMANITAS Gradenigo Hospital, Turin, Italy
| | - Renato Parente
- Pathology Unit, HUMANITAS Gradenigo Hospital, Turin, Italy
| | | | - Nicola Leone
- Gastroenterology Unit, HUMANITAS Gradenigo Hospital, Turin, Italy
| | | | - Maurizio Cassader
- Department of Medical Sciences, Città della Salute e della Scienza Hospital, University of Turin, Turin, Italy
| | - Roberto Gambino
- Department of Medical Sciences, Città della Salute e della Scienza Hospital, University of Turin, Turin, Italy
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4
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Macdonald JK, Clift CL, Saunders J, Zambrzycki SC, Mehta AS, Drake RR, Angel PM. Differential Protease Specificity by Collagenase as a Novel Approach to Serum Proteomics That Includes Identification of Extracellular Matrix Proteins without Enrichment. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2024; 35:487-497. [PMID: 38329320 PMCID: PMC10921462 DOI: 10.1021/jasms.3c00366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 12/18/2023] [Accepted: 01/10/2024] [Indexed: 02/09/2024]
Abstract
Circulating extracellular matrix (ECM) proteins are serological biomarkers of interest due to their association with pathologies involving disease processes such as fibrosis and cancers. In this study, we investigate the potential for serum biomarker research using differential protease specificity (DPS), leveraging alternate protease specificity as a targeting mechanism to selectively digest circulating ECM protein serum proteins. A proof-of-concept study is presented using serum from patients with cirrhotic liver or hepatocellular carcinoma. The approach uses collagenase DPS for digestion of deglycosylated serum and liquid-chromatography-trapped ion mobility-tandem mass spectrometry (LC-TIMS-MS/MS) to enhance the detection of ECM proteins in serum. It requires no sample enrichment and minimizes the albumin average precursor intensity readout to less than 1.2%. We further demonstrate the capabilities for using the method as a high-throughput matrix-assisted laser/desorption ionization mass spectrometry (MALDI-MS) assay coupled with reference library searching. A goal is to improve the depth and breadth of biofluid proteomics for noninvasive assays.
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Affiliation(s)
- Jade K. Macdonald
- Department of Cell and Molecular
Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, South Carolina 29425, United States
| | | | | | - Stephen C. Zambrzycki
- Department of Cell and Molecular
Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, South Carolina 29425, United States
| | - Anand S. Mehta
- Department of Cell and Molecular
Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, South Carolina 29425, United States
| | - Richard R. Drake
- Department of Cell and Molecular
Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, South Carolina 29425, United States
| | - Peggi M. Angel
- Department of Cell and Molecular
Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, South Carolina 29425, United States
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5
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Slusher AL, Nouws J, Tokoglu F, Vash-Margita A, Matthews MD, Fitch M, Shankaran M, Hellerstein MK, Caprio S. Altered extracellular matrix dynamics is associated with insulin resistance in adolescent children with obesity. Obesity (Silver Spring) 2024; 32:593-602. [PMID: 38410080 PMCID: PMC11034857 DOI: 10.1002/oby.23974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 11/27/2023] [Accepted: 11/29/2023] [Indexed: 02/28/2024]
Abstract
OBJECTIVE The objective of this study was to examine the hypothesis that abdominal and gluteal adipocyte turnover, lipid dynamics, and fibrogenesis are dysregulated among insulin-resistant (IR) compared with insulin-sensitive (IS) adolescents with obesity. METHODS Seven IS and seven IR adolescents with obesity participated in a 3-h oral glucose tolerance test and a multi-section magnetic resonance imaging scan of the abdominal region to examine body fat distribution patterns and liver fat content. An 8-week 70% deuterated water (2 H2 O) labeling protocol examined adipocyte turnover, lipid dynamics, and fibrogenesis in vivo from biopsied abdominal and gluteal fat. RESULTS Abdominal and gluteal subcutaneous adipose tissue (SAT) turnover rates of lipid components were similar among IS and IR adolescents with obesity. However, the insoluble collagen (type I, subunit α2) isoform measured from abdominal, but not gluteal, SAT was elevated in IR compared with IS individuals. In addition, abdominal insoluble collagen Iα2 was associated with ratios of visceral-to-total (visceral adipose tissue + SAT) abdominal fat and whole-body and adipose tissue insulin signaling, and it trended toward a positive association with liver fat content. CONCLUSIONS Altered extracellular matrix dynamics, but not expandability, potentially decreases abdominal SAT lipid storage capacity, contributing to the pathophysiological pathways linking adipose tissue and whole-body IR with altered ectopic storage of lipids within the liver among IR adolescents with obesity.
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Affiliation(s)
- Aaron L. Slusher
- Department of Pediatrics, Yale School of Medicine, New Haven, CT, USA
| | - Jessica Nouws
- Pulmonary, Critical Care and Sleep Medicine, Yale School of Medicine, New Haven, CT
| | - Fuyuze Tokoglu
- Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, CT, USA
| | - Alla Vash-Margita
- Department of Obstetrics, Gynecology and Reproductive Sciences, Yale School of Medicine, New Haven, CT, USA
| | - Marcy D. Matthews
- Department of Nutritional Sciences and Toxicology, University of California Berkeley, Berkeley, CA, USA
| | - Mark Fitch
- Department of Nutritional Sciences and Toxicology, University of California Berkeley, Berkeley, CA, USA
| | - Mahalakshmi Shankaran
- Department of Nutritional Sciences and Toxicology, University of California Berkeley, Berkeley, CA, USA
| | - Marc K. Hellerstein
- Department of Nutritional Sciences and Toxicology, University of California Berkeley, Berkeley, CA, USA
| | - Sonia Caprio
- Department of Pediatrics, Yale School of Medicine, New Haven, CT, USA
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6
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Mahmoudi A, Butler AE, De Vincentis A, Jamialahmadi T, Sahebkar A. Microarray-based Detection of Critical Overexpressed Genes in the Progression of Hepatic Fibrosis in Non-alcoholic Fatty Liver Disease: A Protein-protein Interaction Network Analysis. Curr Med Chem 2024; 31:3631-3652. [PMID: 37194229 DOI: 10.2174/0929867330666230516123028] [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: 02/02/2023] [Revised: 03/26/2023] [Accepted: 04/11/2023] [Indexed: 05/18/2023]
Abstract
BACKGROUND Non-alcoholic fatty liver disease (NAFLD) is a prevalent cause of chronic liver disease and encompasses a broad spectrum of disorders, including simple steatosis, steatohepatitis, fibrosis, cirrhosis, and liver cancer. However, due to the global epidemic of NAFLD, where invasive liver biopsy is the gold standard for diagnosis, it is necessary to identify a more practical method for early NAFLD diagnosis with useful therapeutic targets; as such, molecular biomarkers could most readily serve these aims. To this end, we explored the hub genes and biological pathways in fibrosis progression in NAFLD patients. METHODS Raw data from microarray chips with GEO accession GSE49541 were downloaded from the Gene Expression Omnibus database, and the R package (Affy and Limma) was applied to investigate differentially expressed genes (DEGs) involved in the progress of low- (mild 0-1 fibrosis score) to high- (severe 3-4 fibrosis score) fibrosis stage NAFLD patients. Subsequently, significant DEGs with pathway enrichment were analyzed, including gene ontology (GO), KEGG and Wikipathway. In order to then explore critical genes, the protein-protein interaction network (PPI) was established and visualized using the STRING database, with further analysis undertaken using Cytoscape and Gephi software. Survival analysis was undertaken to determine the overall survival of the hub genes in the progression of NAFLD to hepatocellular carcinoma. RESULTS A total of 311 significant genes were identified, with an expression of 278 being upregulated and 33 downregulated in the high vs. low group. Gene functional enrichment analysis of these significant genes demonstrated major involvement in extracellular matrix (ECM)-receptor interaction, protein digestion and absorption, and the AGE-RAGE signaling pathway. The PPI network was constructed with 196 nodes and 572 edges with PPI enrichment using a p-value < 1.0 e-16. Based on this cut-off, we identified 12 genes with the highest score in four centralities: Degree, Betweenness, Closeness, and Eigenvector. Those twelve hub genes were CD34, THY1, CFTR, COL3A1, COL1A1, COL1A2, SPP1, THBS1, THBS2, LUM, VCAN, and VWF. Four of these hub genes, namely CD34, VWF, SPP1, and VCAN, showed significant association with the development of hepatocellular carcinoma. CONCLUSION This PPI network analysis of DEGs identified critical hub genes involved in the progression of fibrosis and the biological pathways through which they exert their effects in NAFLD patients. Those 12 genes offer an excellent opportunity for further focused research to determine potential targets for therapeutic applications.
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Affiliation(s)
- Ali Mahmoudi
- Student Research Committee, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
- Department of Medical Biotechnology and Nanotechnology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | | | - Antonio De Vincentis
- Unit of Internal Medicine and Geriatrics, Università Campus Bio-Medico di Roma, Fondazione Policlinico Universitario Campus Bio-Medico di Roma, Via Alvaro del Portillo 200, Rome 00128, Italy
| | - Tannaz Jamialahmadi
- Applied Biomedical Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Amirhossein Sahebkar
- Applied Biomedical Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
- Biotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
- School of Medicine, The University of Western Australia, Perth, Australia
- Department of Biotechnology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
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7
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Li X, Zhang Q, Yu SM, Li Y. The Chemistry and Biology of Collagen Hybridization. J Am Chem Soc 2023; 145:10901-10916. [PMID: 37158802 PMCID: PMC10789224 DOI: 10.1021/jacs.3c00713] [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] [Indexed: 05/10/2023]
Abstract
Collagen provides mechanical and biological support for virtually all human tissues in the extracellular matrix (ECM). Its defining molecular structure, the triple-helix, could be damaged and denatured in disease and injuries. To probe collagen damage, the concept of collagen hybridization has been proposed, revised, and validated through a series of investigations reported as early as 1973: a collagen-mimicking peptide strand may form a hybrid triple-helix with the denatured chains of natural collagen but not the intact triple-helical collagen proteins, enabling assessment of proteolytic degradation or mechanical disruption to collagen within a tissue-of-interest. Here we describe the concept and development of collagen hybridization, summarize the decades of chemical investigations on rules underlying the collagen triple-helix folding, and discuss the growing biomedical evidence on collagen denaturation as a previously overlooked ECM signature for an array of conditions involving pathological tissue remodeling and mechanical injuries. Finally, we propose a series of emerging questions regarding the chemical and biological nature of collagen denaturation and highlight the diagnostic and therapeutic opportunities from its targeting.
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Affiliation(s)
- Xiaojing Li
- Guangdong Provincial Engineering Research Center of Molecular Imaging, Department of Radiology, Cardiac Surgery and Structural Heart Disease Unit of Cardiovascular Center, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, 519000, China
| | - Qi Zhang
- Guangdong Provincial Engineering Research Center of Molecular Imaging, Department of Radiology, Cardiac Surgery and Structural Heart Disease Unit of Cardiovascular Center, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, 519000, China
| | - S. Michael Yu
- Department of Biomedical Engineering, Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Yang Li
- Guangdong Provincial Engineering Research Center of Molecular Imaging, Department of Radiology, Cardiac Surgery and Structural Heart Disease Unit of Cardiovascular Center, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, 519000, China
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8
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Alemán MN, Sánchez SS, Honoré SM. Daily Intake of Smallanthus sonchifolius (Yacon) Roots Reduces the Progression of Non-alcoholic Fatty Liver in Rats Fed a High Fructose Diet. PLANT FOODS FOR HUMAN NUTRITION (DORDRECHT, NETHERLANDS) 2022; 77:521-528. [PMID: 36048356 DOI: 10.1007/s11130-022-01009-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 08/22/2022] [Indexed: 06/15/2023]
Abstract
High-fructose diet is associated with an increased risk of dyslipidemia, metabolic syndrome, and the development of non-alcoholic fatty liver disease (NAFLD) through chronic inflammation. The present study aimed to elucidate the potential benefit of daily consumption of Smallanthus sonchifolius (yacon) roots, rich in fructooligosaccharides (FOS), on the progression to liver fibrosis, in a rat model of NAFLD induced by a high-fructose diet. Male Wistar rats were fed a standard diet (CD, n = 6) or a standard diet plus 10% fructose solution (FD; n = 18). After 20 weeks, FD rats were randomly separated into the following groups (n = 6, each): FD; FD treated with yacon flour (340 mg FOS/body weight; FD + Y) and FD treated with fenofibrate (30 mg/kg body weight; FD + F), for 16 weeks. Daily intake of yacon flour significantly reduced body weight gain, plasma lipid levels, transaminase activities, and improved systemic insulin response in FD rats. In the liver, yacon treatment decreased fructose-induced steatosis and inflammation, and reduced total collagen deposition (64%). Also, yacon decreased TGF-β1 mRNA expression (78%), followed by decreased nuclear localization of p-Smad2/3 in liver tissue. Yacon significantly reduced the expression of α-smooth muscle actin (α-SMA), Col1α1, and Col3α1 mRNAs (85, 44, and 47%, respectively), inhibiting the activation of resident hepatic stellate cells (HSCs). These results suggested that yacon roots have the potential to ameliorate liver damage caused by long-term consumption of a high-fructose diet, being a promising nutritional strategy in NAFLD management.
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Affiliation(s)
- Mariano Nicolás Alemán
- Instituto Superior de Investigaciones Biológicas (INSIBIO), CONICET-UNT, Chacabuco 461, T4000ILI, San Miguel de Tucumán, Argentina
- Instituto de Biología "Dr. Francisco D. Barbieri" Facultad de Bioquímica, Química y Farmacia- Universidad Nacional de Tucumán (UNT), San Miguel de Tucumán, Argentina
| | - Sara Serafina Sánchez
- Instituto Superior de Investigaciones Biológicas (INSIBIO), CONICET-UNT, Chacabuco 461, T4000ILI, San Miguel de Tucumán, Argentina
| | - Stella Maris Honoré
- Instituto Superior de Investigaciones Biológicas (INSIBIO), CONICET-UNT, Chacabuco 461, T4000ILI, San Miguel de Tucumán, Argentina.
- Instituto de Biología "Dr. Francisco D. Barbieri" Facultad de Bioquímica, Química y Farmacia- Universidad Nacional de Tucumán (UNT), San Miguel de Tucumán, Argentina.
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9
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Naylor B, Anderson CNK, Hadfield M, Parkinson DH, Ahlstrom A, Hannemann A, Quilling CR, Cutler KJ, Denton RL, Adamson R, Angel TE, Burlett RS, Hafen PS, Dallon JC, Transtrum MK, Hyldahl RD, Price JC. Utilizing Nonequilibrium Isotope Enrichments to Dramatically Increase Turnover Measurement Ranges in Single Biopsy Samples from Humans. J Proteome Res 2022; 21:2703-2714. [PMID: 36099490 PMCID: PMC9639613 DOI: 10.1021/acs.jproteome.2c00380] [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: 07/06/2022] [Indexed: 11/30/2022]
Abstract
The synthesis of new proteins and the degradation of old proteins in vivo can be quantified in serial samples using metabolic isotope labeling to measure turnover. Because serial biopsies in humans are impractical, we set out to develop a method to calculate the turnover rates of proteins from single human biopsies. This method involved a new metabolic labeling approach and adjustments to the calculations used in previous work to calculate protein turnover. We demonstrate that using a nonequilibrium isotope enrichment strategy avoids the time dependent bias caused by variable lag in label delivery to different tissues observed in traditional metabolic labeling methods. Turnover rates are consistent for the same subject in biopsies from different labeling periods, and turnover rates calculated in this study are consistent with previously reported values. We also demonstrate that by measuring protein turnover we can determine where proteins are synthesized. In human subjects a significant difference in turnover rates differentiated proteins synthesized in the salivary glands versus those imported from the serum. We also provide a data analysis tool, DeuteRater-H, to calculate protein turnover using this nonequilibrium metabolic 2H2O method.
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Affiliation(s)
- Bradley
C. Naylor
- Department
of Chemistry and Biochemistry, Brigham Young
University, Provo, Utah 84602, United States
| | | | - Marcus Hadfield
- Department
of Chemistry and Biochemistry, Brigham Young
University, Provo, Utah 84602, United States
| | - David H. Parkinson
- Department
of Chemistry and Biochemistry, Brigham Young
University, Provo, Utah 84602, United States
| | - Austin Ahlstrom
- Department
of Chemistry and Biochemistry, Brigham Young
University, Provo, Utah 84602, United States
| | - Austin Hannemann
- Department
of Chemistry and Biochemistry, Brigham Young
University, Provo, Utah 84602, United States
| | - Chad R. Quilling
- Department
of Chemistry and Biochemistry, Brigham Young
University, Provo, Utah 84602, United States
| | - Kyle J. Cutler
- Department
of Chemistry and Biochemistry, Brigham Young
University, Provo, Utah 84602, United States
| | - Russell L. Denton
- Department
of Chemistry and Biochemistry, Brigham Young
University, Provo, Utah 84602, United States
| | - Robert Adamson
- Department
of Chemistry and Biochemistry, Brigham Young
University, Provo, Utah 84602, United States
| | - Thomas E. Angel
- In-vitro/In-vivo
Translation Platform Group, GlaxoSmithKline, Collegeville, Pennsylvania 19426, United States
| | - Rebecca S. Burlett
- Department
of Chemistry and Biochemistry, Brigham Young
University, Provo, Utah 84602, United States
| | - Paul S. Hafen
- Department
of Exercise Sciences, Brigham Young University, Provo, Utah 84602, United States
| | - John. C. Dallon
- Department
of Mathematics, Brigham Young University, Provo, Utah 84602, United States
| | - Mark K. Transtrum
- Department
of Physics and Astronomy, Brigham Young
University, Provo, Utah 84602, United States
| | - Robert D. Hyldahl
- Department
of Exercise Sciences, Brigham Young University, Provo, Utah 84602, United States
| | - John C. Price
- Department
of Chemistry and Biochemistry, Brigham Young
University, Provo, Utah 84602, United States
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10
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Naoumov NV, Brees D, Loeffler J, Chng E, Ren Y, Lopez P, Tai D, Lamle S, Sanyal AJ. Digital pathology with artificial intelligence analyses provides greater insights into treatment-induced fibrosis regression in NASH. J Hepatol 2022; 77:1399-1409. [PMID: 35779659 DOI: 10.1016/j.jhep.2022.06.018] [Citation(s) in RCA: 36] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 05/21/2022] [Accepted: 06/10/2022] [Indexed: 12/12/2022]
Abstract
BACKGROUND & AIMS Liver fibrosis is a key prognostic determinant for clinical outcomes in non-alcoholic steatohepatitis (NASH). Current scoring systems have limitations, especially in assessing fibrosis regression. Second harmonic generation/two-photon excitation fluorescence (SHG/TPEF) microscopy with artificial intelligence analyses provides standardized evaluation of NASH features, especially liver fibrosis and collagen fiber quantitation on a continuous scale. This approach was applied to gain in-depth understanding of fibrosis dynamics after treatment with tropifexor (TXR), a non-bile acid farnesoid X receptor agonist in patients participating in the FLIGHT-FXR study (NCT02855164). METHOD Unstained sections from 198 liver biopsies (paired: baseline and end-of-treatment) from 99 patients with NASH (fibrosis stage F2 or F3) who received placebo (n = 34), TXR 140 μg (n = 37), or TXR 200 μg (n = 28) for 48 weeks were examined. Liver fibrosis (qFibrosis®), hepatic fat (qSteatosis®), and ballooned hepatocytes (qBallooning®) were quantitated using SHG/TPEF microscopy. Changes in septa morphology, collagen fiber parameters, and zonal distribution within liver lobules were also quantitatively assessed. RESULTS Digital analyses revealed treatment-associated reductions in overall liver fibrosis (qFibrosis®), unlike conventional microscopy, as well as marked regression in perisinusoidal fibrosis in patients who had either F2 or F3 fibrosis at baseline. Concomitant zonal quantitation of fibrosis and steatosis revealed that patients with greater qSteatosis reduction also have the greatest reduction in perisinusoidal fibrosis. Regressive changes in septa morphology and reduction in septa parameters were observed almost exclusively in F3 patients, who were adjudged as 'unchanged' with conventional scoring. CONCLUSION Fibrosis regression following hepatic fat reduction occurs initially in the perisinusoidal regions, around areas of steatosis reduction. Digital pathology provides new insights into treatment-induced fibrosis regression in NASH, which are not captured by current staging systems. LAY SUMMARY The degree of liver fibrosis (tissue scarring) in non-alcoholic steatohepatitis (NASH) is the main predictor of negative clinical outcomes. Accurate assessment of the quantity and architecture of liver fibrosis is fundamental for patient enrolment in NASH clinical trials and for determining treatment efficacy. Using digital microscopy with artificial intelligence analyses, the present study demonstrates that this novel approach has greater sensitivity in demonstrating treatment-induced reversal of fibrosis in the liver than current systems. Furthermore, additional details are obtained regarding the pathogenesis of NASH disease and the effects of therapy.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Arun J Sanyal
- Virginia Commonwealth University School of Medicine, Richmond, United States
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11
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Valenti L, Tripodi A, La Mura V, Pelusi S, Bianco C, Scalambrino E, Margarita S, Malvestiti F, Ronzoni L, Clerici M, D’Ambrosio R, Fraquelli M, Carpani R, Prati D, Peyvandi F. Interplay between coagulation and determinants of liver disease in patients with metabolic dysfunction. JHEP Rep 2022; 4:100598. [PMID: 36313186 PMCID: PMC9597122 DOI: 10.1016/j.jhepr.2022.100598] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background & Aims The aim of this study was to examine the determinants of the interplay between liver damage and the coagulation balance in individuals at risk of non-alcoholic fatty liver disease (NAFLD). Methods We considered 581 healthy participants with ≥3 metabolic alterations undergoing clinical and genomic evaluation, measurement of liver stiffness (LSM) and controlled attenuation parameter (CAP) by Fibroscan, Pro-C3, coagulation balance (von Willebrand factor [vWF], factor VIII/protein C ratio [F8/PC] as the main outcome, D-dimer as marker of coagulation/fibrinolysis activation). Results Liver fibrosis indices (both Fibrosis-4 [FIB-4] and liver stiffness measurement [LSM]), but not liver fat (CAP), were independently associated with higher F8/PC ratio (p <0.01), triggering D-dimer formation (p = 2E-21). In keeping with a causal role of liver damage in determining a procoagulant status, the main fatty liver inherited risk variant PNPLA3 p.I148M was independently associated with the F8/PC ratio (p = 0.048). Vice versa, the main determinant of the coagulation balance was ABO locus variation (p = 1E-16), through the impact on vWF (p = 8E-26). Both rs687289 ABO and factor V Leiden were independently associated with higher Pro-C3 (p <0.025), with the effect of ABO being mediated by the impact on vWF (p = 5E-10 for association with Pro-C3). Mendelian randomisation analysis was consistent with a causal association of procoagulant imbalance with heightened fibrogenesis (p = 0.001 at robust MR-Egger for Pro-C3), but not with fibrosis (for LSM; p = not significant). Conclusions In individuals with metabolic dysfunction, liver damage severity and possibly the PNPLA3 p.I148M variant were associated with procoagulant status. Vice versa, evaluation of inherited variants in ABO and other genes influencing coagulation was consistent with a causal role of procoagulant imbalance in activation of early stages of fibrogenesis. Lay summary In individuals with metabolic alterations at risk of metabolic fatty liver disease, there is a tendency toward heightened blood coagulation (clotting), but the cause and the impact on the progression of liver disease remain unclear. Here we show that liver damage severity and metabolic alterations, but not hepatic fat, are mainly responsible for heightened coagulation in patients with metabolic fatty liver disease. By using genetic approaches, we showed that hepatic inflammation due to lipotoxicity may favour heightened coagulation, which in turn can trigger liver fibrosis, igniting a vicious cycle that leads to progressive liver disease. There is a complex interplay between liver damage and the coagulation balance in individuals at risk of non-alcoholic fatty liver disease. Non-invasive indices and genetic determinants of liver damage, but not fat, were associated with a procoagulant imbalance. Vice versa, genetic predisposition to hypercoagulability was associated with fibrogenesis. In individuals with metabolic dysfunction, liver damage appears to promote coagulation, which in turn can activate fibrogenesis.
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12
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Siler SQ. Applications of Quantitative Systems Pharmacology (QSP) in Drug Development for NAFLD and NASH and Its Regulatory Application. Pharm Res 2022; 39:1789-1802. [PMID: 35610402 PMCID: PMC9314276 DOI: 10.1007/s11095-022-03295-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 05/17/2022] [Indexed: 02/08/2023]
Abstract
Nonalcoholic steatohepatitis (NASH) is a widely prevalent disease, but approved pharmaceutical treatments are not available. As such, there is great activity within the pharmaceutical industry to accelerate drug development in this area and improve the quality of life and reduce mortality for NASH patients. The use of quantitative systems pharmacology (QSP) can help make this overall process more efficient. This mechanism-based mathematical modeling approach describes both the pathophysiology of a disease and how pharmacological interventions can modify pathophysiologic mechanisms. Multiple capabilities are provided by QSP modeling, including the use of model predictions to optimize clinical studies. The use of this approach has grown over the last 20 years, motivating discussions between modelers and regulators to agree upon methodologic standards. These include model transparency, documentation, and inclusion of clinical pharmacodynamic biomarkers. Several QSP models have been developed that describe NASH pathophysiology to varying extents. One specific application of NAFLDsym, a QSP model of NASH, is described in this manuscript. Simulations were performed to help understand if patient behaviors could help explain the relatively high rate of fibrosis stage reductions in placebo cohorts. Simulated food intake and body weight fluctuated periodically over time. The relatively slow turnover of liver collagen allowed persistent reductions in predicted fibrosis stage despite return to baseline for liver fat, plasma ALT, and the NAFLD activity score. Mechanistic insights such as this that have been derived from QSP models can help expedite the development of safe and effective treatments for NASH patients.
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Affiliation(s)
- Scott Q Siler
- DILIsym Services, a Division of Simulations Plus, 510-862-6027, 6 Davis Drive, PO Box 12317, Research Triangle Park, North Carolina, 27709, USA.
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13
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Dooling LJ, Saini K, Anlaş AA, Discher DE. Tissue mechanics coevolves with fibrillar matrisomes in healthy and fibrotic tissues. Matrix Biol 2022; 111:153-188. [PMID: 35764212 PMCID: PMC9990088 DOI: 10.1016/j.matbio.2022.06.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 06/16/2022] [Accepted: 06/23/2022] [Indexed: 12/12/2022]
Abstract
Fibrillar proteins are principal components of extracellular matrix (ECM) that confer mechanical properties to tissues. Fibrosis can result from wound repair in nearly every tissue in adults, and it associates with increased ECM density and crosslinking as well as increased tissue stiffness. Such fibrotic tissues are a major biomedical challenge, and an emerging view posits that the altered mechanical environment supports both synthetic and contractile myofibroblasts in a state of persistent activation. Here, we review the matrisome in several fibrotic diseases, as well as normal tissues, with a focus on physicochemical properties. Stiffness generally increases with the abundance of fibrillar collagens, the major constituent of ECM, with similar mathematical trends for fibrosis as well as adult tissues from soft brain to stiff bone and heart development. Changes in expression of other core matrisome and matrisome-associated proteins or proteoglycans contribute to tissue stiffening in fibrosis by organizing collagen, crosslinking ECM, and facilitating adhesion of myofibroblasts. Understanding how ECM composition and mechanics coevolve during fibrosis can lead to better models and help with antifibrotic therapies.
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Affiliation(s)
- Lawrence J Dooling
- Molecular and Cellular Biophysics Lab, University of Pennsylvania,Philadelphia, PA 19104, USA
| | - Karanvir Saini
- Molecular and Cellular Biophysics Lab, University of Pennsylvania,Philadelphia, PA 19104, USA
| | - Alişya A Anlaş
- Molecular and Cellular Biophysics Lab, University of Pennsylvania,Philadelphia, PA 19104, USA
| | - Dennis E Discher
- Molecular and Cellular Biophysics Lab, University of Pennsylvania,Philadelphia, PA 19104, USA.
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14
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Kahn DE, Bergman BC. Keeping It Local in Metabolic Disease: Adipose Tissue Paracrine Signaling and Insulin Resistance. Diabetes 2022; 71:599-609. [PMID: 35316835 PMCID: PMC8965661 DOI: 10.2337/dbi21-0020] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 01/03/2022] [Indexed: 01/04/2023]
Abstract
Alterations in adipose tissue composition and function are associated with obesity and contribute to the development of type 2 diabetes. While the significance of this relationship has been cemented, our understanding of the multifaceted role of adipose tissue in metabolic heath and disease continues to evolve and expand. Heterogenous populations of cells that make up adipose tissue throughout the body generate diverse secretomes containing a mosaic of bioactive compounds with vast structural and signaling capabilities. While there are many reports highlighting the important role of adipose tissue endocrine signaling in insulin resistance and type 2 diabetes, the direct, local, paracrine effect of adipose tissue has received less attention. Recent studies have begun to underscore the importance of considering anatomically discrete adipose depots for their specific impact on local microenvironments and metabolic function in neighboring tissues as well as regulation of whole-body physiology. This article highlights the important role of adipose tissue paracrine signaling on metabolic function and insulin sensitivity in nearby tissues and organs, specifically focusing on visceral, pancreatic, subcutaneous, intermuscular, and perivascular adipose tissue depots.
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Affiliation(s)
- Darcy E. Kahn
- University of Colorado Anschutz Medical Campus, Aurora, CO
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15
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Gao R, Wang J, He X, Wang T, Zhou L, Ren Z, Yang J, Xiang X, Wen S, Yu Z, Ai H, Wang Y, Liang H, Li S, Lu Y, Zhu Y, Shi G, Chen Y. Comprehensive analysis of endoplasmic reticulum-related and secretome gene expression profiles in the progression of non-alcoholic fatty liver disease. Front Endocrinol (Lausanne) 2022; 13:967016. [PMID: 36034446 PMCID: PMC9412753 DOI: 10.3389/fendo.2022.967016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Accepted: 07/25/2022] [Indexed: 11/13/2022] Open
Abstract
Endoplasmic reticulum (ER) is the principal organelle for protein synthesis, such as hepatokines and transmembrane proteins, and is critical for maintaining physiological function. Dysfunction of ER is associated with metabolic disorders. However, the role of ER homeostasis as well as hepatokines in the progression of non-alcoholic fatty liver disease (NAFLD) remains to be elucidated. Here we comprehensively analyzed the RNA-seq profiles of liver biopsies from 206 NAFLD patients and 10 controls from dataset GSE135251. The co-expression modules were constructed based on weighted gene co-expression network analysis and six co-expression modules were identified, of which brown module stood out to be significantly associated with fibrosis stage and NAFLD activity score (NAS). Subsequently, cytoscape with cytoHubba plugin was applied to identify hub genes in the brown module. GO and KEGG enrichment analysis of the top 20 hub genes were performed and showed the involvement of extracellular matrix formation, collagen synthesis and decomposition, etc. Further, the expression of the top 20 hub genes were found to be a consistent increasing trend as the fibrosis stages and NAS increased, which have been validated both in HFD fed and HFHC fed mice. Among these genes, THY1, PTGDS, TMPRSS3, SPON1, COL1A2, RHBDF1, COL3A1, COL5A1, COL1A1 and IGFBP7 performed well in distinguishing fibrosis stage, while COL1A2, COL3A1, THY1, RHBDF1 and COL1A2 exhibited good capacity to discriminate NAS. Besides, RHBDF1, COL3A1, QSOX1, STING1, COL5A1, IGFBP7, COL4A2, COL1A1, FKBP10 and COL1A2 also showed a strong power in the diagnosis of NAFLD. In addition, COL1A1, COL1A2, COL3A1, COL8A2, IGFBP7, PGF, PTGDS, SPON1, THY1 and TIMP1 were identified as secretome genes from the top 20 hub genes. Of them, circulated THY1 and collagen III level were validated to be significantly elevated in the MCD diet-induced mice. Thus, we provided a systemic view on understanding the pathological roles and mechanisms of ER as well as secretome in NAFLD progression. THY1, COL1A1, COL1A2, COL3A1 and RHBDF1 could be served as candidate biomarkers to evaluate the progression of NAFLD.
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Affiliation(s)
- Rong Gao
- Department of Endocrinology and Metabolism, Guangdong Provincial Key Laboratory of Diabetology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Jin Wang
- Department of Endocrinology and Metabolism, Guangdong Provincial Key Laboratory of Diabetology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Xuemin He
- Department of Endocrinology and Metabolism, Guangdong Provincial Key Laboratory of Diabetology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Tongtong Wang
- Department of Clinical Immunology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Li Zhou
- Department of Endocrinology and Metabolism, Guangdong Provincial Key Laboratory of Diabetology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Zhitao Ren
- Department of Endocrinology and Metabolism, Guangdong Provincial Key Laboratory of Diabetology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Jifeng Yang
- Department of Endocrinology and Metabolism, Guangdong Provincial Key Laboratory of Diabetology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Xiaoxin Xiang
- Department of Endocrinology and Metabolism, Guangdong Provincial Key Laboratory of Diabetology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Shiyi Wen
- Department of Endocrinology and Metabolism, Guangdong Provincial Key Laboratory of Diabetology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Zhuojun Yu
- Department of Endocrinology and Metabolism, Guangdong Provincial Key Laboratory of Diabetology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Heying Ai
- Department of Endocrinology and Metabolism, Guangdong Provincial Key Laboratory of Diabetology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Yuchan Wang
- Department of Endocrinology and Metabolism, Guangdong Provincial Key Laboratory of Diabetology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Hua Liang
- Department of Endocrinology and Metabolism, Guangdong Provincial Key Laboratory of Diabetology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Shasha Li
- Department of Endocrinology and Metabolism, Guangdong Provincial Key Laboratory of Diabetology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Yan Lu
- Department of Clinical Immunology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Yanhua Zhu
- Department of Endocrinology and Metabolism, Guangdong Provincial Key Laboratory of Diabetology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Guojun Shi
- Department of Endocrinology and Metabolism, Guangdong Provincial Key Laboratory of Diabetology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
- *Correspondence: Yanming Chen, ; Guojun Shi,
| | - Yanming Chen
- Department of Endocrinology and Metabolism, Guangdong Provincial Key Laboratory of Diabetology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
- *Correspondence: Yanming Chen, ; Guojun Shi,
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16
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Mosca A, Mantovani A, Crudele A, Panera N, Comparcola D, De Vito R, Bianchi M, Byrne CD, Targher G, Alisi A. Higher Levels of Plasma Hyaluronic Acid and N-terminal Propeptide of Type III Procollagen Are Associated With Lower Kidney Function in Children With Non-alcoholic Fatty Liver Disease. Front Pediatr 2022; 10:917714. [PMID: 35733806 PMCID: PMC9207333 DOI: 10.3389/fped.2022.917714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 05/03/2022] [Indexed: 11/17/2022] Open
Abstract
OBJECTIVE Hyaluronic acid (HA) and N-terminal propeptide of type III procollagen (PIIINP) are two non-invasive biomarkers of liver fibrosis in non-alcoholic fatty liver disease (NAFLD). We examined the relationships of plasma levels of HA and PIIINP with kidney function in children with NAFLD. METHODS Plasma HA and PIIINP levels were measured using two commercially available enzyme-linked immunosorbent assay kits in a cohort of 106 Caucasian overweight or obese children with biopsy-proven NAFLD. Glomerular filtration rate (eGFR) was estimated using the Bedside Schwartz equation. Genotyping for the patatin-like phospholipase domain-containing protein-3 (PNPLA3) rs738409 variant was performed using an allelic discrimination assay. RESULTS Children with fibrosis F2 had significantly higher plasma PIIINP and HA levels than those with F0 or F1 fibrosis. Liver fibrosis was positively associated with plasma HA and PIIINP, as well as with the presence of the risk allele G of PNPLA3 rs738409 variant, and negatively with eGFR. Moreover, eGFR showed significant inverse associations with HA and PIIINP levels, as well as the presence of G of PNPLA3 rs738409, and liver fibrosis stage. Notably, our multivariable regression models showed that higher plasma PIIINP (standardized beta coefficient: -0.206, P = 0.011) and HA levels (standardized beta coefficient: -0.531, P < 0.0001) were associated with lower eGFR values, even after adjustment for age, sex, systolic blood pressure, PNPLA3 rs738409 genotype, and any stage of liver fibrosis. CONCLUSIONS Higher levels of HA and PIIINP were associated with lower eGFR values in Caucasian children with biopsy-proven NAFLD, independently of PNPLA3 rs738409 genotype and other potential confounding factors.
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Affiliation(s)
- Antonella Mosca
- Hepatology, Gastroenterology and Nutrition Unit, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Alessandro Mantovani
- Section of Endocrinology, Diabetes and Metabolism, Department of Medicine, University and Azienda Ospedaliera Universitaria Integrata of Verona, Verona, Italy
| | - Annalisa Crudele
- Research Unit of Molecular Genetics of Complex Phenotypes, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Nadia Panera
- Research Unit of Molecular Genetics of Complex Phenotypes, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Donatella Comparcola
- Hepatology, Gastroenterology and Nutrition Unit, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Rita De Vito
- Unit of Pathology, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Marzia Bianchi
- Research Unit of Molecular Genetics of Complex Phenotypes, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Christopher D Byrne
- Southampton National Institute for Health Research Biomedical Research Centre, Southampton General Hospital, University Hospital Southampton, Southampton, United Kingdom.,Nutrition and Metabolism, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Giovanni Targher
- Section of Endocrinology, Diabetes and Metabolism, Department of Medicine, University and Azienda Ospedaliera Universitaria Integrata of Verona, Verona, Italy
| | - Anna Alisi
- Research Unit of Molecular Genetics of Complex Phenotypes, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
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17
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Torp N, Israelsen M, Nielsen MJ, Åstrand CP, Juhl P, Johansen S, Hansen CD, Madsen B, Villesen IF, Leeming DJ, Thiele M, Hansen T, Karsdal M, Krag A. Binge drinking induces an acute burst of markers of hepatic fibrogenesis (PRO-C3). Liver Int 2022; 42:92-101. [PMID: 34845832 DOI: 10.1111/liv.15120] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 10/27/2021] [Accepted: 11/03/2021] [Indexed: 12/16/2022]
Abstract
BACKGROUND & AIMS Binge drinking is associated with an increased risk of liver disease. Morbidity and mortality of alcohol-related liver disease (ALD) is associated with collagen deposition in the hepatic extracellular matrix (ECM). However, the acute effects of binge drinking on ECM turnover are unknown. We aimed to investigate the effects on hepatic ECM turnover following a binge drinking episode. METHODS We performed a pathophysiological intervention study with 15 non-alcoholic fatty liver disease (NAFLD) patients, 15 ALD patients and 10 healthy controls. We used 40% ethanol in 9 mg/mL NaCl administered through a nasogastric tube to simulate binge drinking. Hepatic vein catheterisation allowed simultaneous hepatic- and systemic vein sampling. Markers of ECM formation and degradation were measured with competitive ELISA. RESULTS The interstitial matrix formation marker PRO-C3 increased by 1.2 ng/mL (10%, P < .001) 24 hours after binge drinking. In participants with existing liver fibrosis determined by elevated baseline PRO-C3, hepatic levels increased by 0.09 ng/mL (95% CI: 0.03-0.15, P = .005) while systemic PRO-C3 decreased 0.11 ng/mL (95% CI: -0.15 to -0.06, P < .001) in 3 hours. PRO-C8 increased by 30% (+0.9 ng/mL, P = .014) in liver-diseased patients with F0-F1 but not in any other group. Twenty-four-hour changes in systemic C3M and PRO-C3 were not associated (P = .911). CONCLUSIONS Binge drinking induced an acute burst of PRO-C3 in healthy individuals and patients with liver disease. Markers of ECM degradation were not correlated to markers of ECM formation, suggesting that even a single episode of binge drinking promotes excessive hepatic fibrogenesis.
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Affiliation(s)
- Nikolaj Torp
- Department of Gastroenterology and Hepatology, Odense University Hospital, Odense, Denmark.,Institute of Clinical Research, University of Southern Denmark, Odense, Denmark
| | - Mads Israelsen
- Department of Gastroenterology and Hepatology, Odense University Hospital, Odense, Denmark.,Institute of Clinical Research, University of Southern Denmark, Odense, Denmark
| | | | - Claus P Åstrand
- Department of Gastroenterology and Hepatology, Odense University Hospital, Odense, Denmark.,Institute of Clinical Research, University of Southern Denmark, Odense, Denmark
| | - Pernille Juhl
- Nordic Bioscience A/S, Herlev Hovedgade, Herlev, Denmark.,Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Stine Johansen
- Department of Gastroenterology and Hepatology, Odense University Hospital, Odense, Denmark.,Institute of Clinical Research, University of Southern Denmark, Odense, Denmark
| | - Camilla D Hansen
- Department of Gastroenterology and Hepatology, Odense University Hospital, Odense, Denmark.,Institute of Clinical Research, University of Southern Denmark, Odense, Denmark
| | - Bjørn Madsen
- Department of Gastroenterology and Hepatology, Odense University Hospital, Odense, Denmark.,Institute of Clinical Research, University of Southern Denmark, Odense, Denmark
| | - Ida F Villesen
- Nordic Bioscience A/S, Herlev Hovedgade, Herlev, Denmark
| | | | - Maja Thiele
- Department of Gastroenterology and Hepatology, Odense University Hospital, Odense, Denmark.,Institute of Clinical Research, University of Southern Denmark, Odense, Denmark
| | - Torben Hansen
- Novo Nordisk Foundation Center for Basic Metabolic Research, University of Copenhagen, Copenhagen, Denmark
| | - Morten Karsdal
- Nordic Bioscience A/S, Herlev Hovedgade, Herlev, Denmark.,Department of Molecular Medicine, Faculty of Health Sciences, University of Southern Denmark, Odense, Denmark
| | - Aleksander Krag
- Department of Gastroenterology and Hepatology, Odense University Hospital, Odense, Denmark.,Institute of Clinical Research, University of Southern Denmark, Odense, Denmark
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18
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Dandan M, Han J, Mann S, Kim R, Mohammed H, Nyangau E, Hellerstein M. Turnover Rates of the Low-Density Lipoprotein Receptor and PCSK9: Added Dimension to the Cholesterol Homeostasis Model. Arterioscler Thromb Vasc Biol 2021; 41:2866-2876. [PMID: 34615375 DOI: 10.1161/atvbaha.121.316764] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE We measured the turnover rates of the LDLR (low-density lipoprotein receptor) and PCSK9 (proprotein convertase subtilisin/kexin type 9) in mice by metabolic labeling with heavy water and mass spectrometry. Approach and Results: In liver of mice fed high-cholesterol diets, LDLR mRNA levels and synthesis rates were markedly lower with complete suppression of cholesterol synthesis and higher cholesterol content, consistent with the Brown-Goldstein model of tissue cholesterol homeostasis. We observed markedly lower PCSK9 mRNA levels and synthesis rates in liver and lower concentrations and synthesis rates in plasma. Hepatic LDLR half-life (t½) was prolonged, consistent with an effect of reduced PCSK9, and resulted in no reduction in hepatic LDLR content despite reduced mRNA levels and LDLR synthesis rates. These changes in PCSK9 synthesis complement and expand the well-established model of tissue cholesterol homeostasis in mouse liver, in that reduced synthesis and levels of PCSK9 counterbalance lower LDLR synthesis by promoting less LDLR catabolism, thereby maintaining uptake of LDL cholesterol into liver despite high intracellular cholesterol concentrations. CONCLUSIONS Lower hepatic synthesis and secretion of PCSK9, an SREBP2 (sterol response element binding protein) target gene, results in longer hepatic LDLR t½ in response to cholesterol feeding in mice in the face of high intracellular cholesterol content. PCSK9 modulation opposes the canonical lowering of LDLR mRNA and synthesis by cholesterol surplus and preserves LDLR levels. The physiological and therapeutic implications of these opposing control mechanisms over liver LDLR are of interest and may reflect subservience of hepatic cholesterol homeostasis to whole body cholesterol needs.
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Affiliation(s)
- Mohamad Dandan
- Graduate Program in Metabolic Biology, Department of Nutritional Sciences and Toxicology, University of California, Berkeley
| | - Julia Han
- Graduate Program in Metabolic Biology, Department of Nutritional Sciences and Toxicology, University of California, Berkeley
| | - Sabrina Mann
- Graduate Program in Metabolic Biology, Department of Nutritional Sciences and Toxicology, University of California, Berkeley
| | - Rachael Kim
- Graduate Program in Metabolic Biology, Department of Nutritional Sciences and Toxicology, University of California, Berkeley
| | - Hussein Mohammed
- Graduate Program in Metabolic Biology, Department of Nutritional Sciences and Toxicology, University of California, Berkeley
| | - Edna Nyangau
- Graduate Program in Metabolic Biology, Department of Nutritional Sciences and Toxicology, University of California, Berkeley
| | - Marc Hellerstein
- Graduate Program in Metabolic Biology, Department of Nutritional Sciences and Toxicology, University of California, Berkeley
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Kozumi K, Kodama T, Murai H, Sakane S, Govaere O, Cockell S, Motooka D, Kakita N, Yamada Y, Kondo Y, Tahata Y, Yamada R, Hikita H, Sakamori R, Kamada Y, Daly AK, Anstee QM, Tatsumi T, Morii E, Takehara T. Transcriptomics Identify Thrombospondin-2 as a Biomarker for NASH and Advanced Liver Fibrosis. Hepatology 2021; 74:2452-2466. [PMID: 34105780 PMCID: PMC8596693 DOI: 10.1002/hep.31995] [Citation(s) in RCA: 67] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 05/07/2021] [Accepted: 05/09/2021] [Indexed: 12/13/2022]
Abstract
BACKGROUND AND AIMS NAFLD is the most common liver disease worldwide. NASH, the progressive form of NAFLD, and advanced fibrosis are associated with poor outcomes. We searched for their noninvasive biomarkers. APPROACH AND RESULTS Global RNA sequencing of liver tissue from 98 patients with biopsy-proven NAFLD was performed. Unsupervised hierarchical clustering well distinguished NASH from nonalcoholic fatty liver (NAFL), and patients with NASH exhibited molecular abnormalities reflecting their pathological features. Transcriptomic analysis identified proteins up-regulated in NASH and/or advanced fibrosis (stage F3-F4), including matricellular glycoprotein thrombospondin-2 (TSP-2), encoded by the thrombospondin 2 (THBS2) gene. The intrahepatic THBS2 expression level showed the highest areas under the receiver operating characteristic curves (AUROCs) of 0.915 and 0.957 for diagnosing NASH and advanced fibrosis, respectively. THBS2 positively correlated with inflammation and ballooning according to NAFLD activity score, serum aspartate aminotransferase and hyaluronic acid (HA) levels, and NAFLD Fibrosis Score (NFS). THBS2 was associated with extracellular matrix and collagen biosynthesis, platelet activation, caspase-mediated cleavage of cytoskeletal proteins, and immune cell infiltration. Serum TSP-2 expression was measured in 213 patients with biopsy-proven NAFLD, was significantly higher in NASH than in NAFL, and increased parallel to fibrosis stage. The AUROCs for predicting NASH and advanced fibrosis were 0.776 and 0.856, respectively, which were comparable to Fibrosis-4 index, serum HA level, and NFS in advanced fibrosis diagnosis. Serum TSP-2 level and platelet count were independent predictors of NASH and advanced fibrosis. Serum TSP-2 levels could stratify patients with NAFLD according to the risk of hepatic complications, including liver cancer and decompensated cirrhotic events. CONCLUSIONS TSP-2 may be a useful biomarker for NASH and advanced fibrosis diagnosis in patients with NAFLD.
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Affiliation(s)
- Kazuhiro Kozumi
- Department of Gastroenterology and HepatologyOsaka University Graduate School of MedicineSuitaJapan
| | - Takahiro Kodama
- Department of Gastroenterology and HepatologyOsaka University Graduate School of MedicineSuitaJapan
| | - Hiroki Murai
- Department of Gastroenterology and HepatologyOsaka University Graduate School of MedicineSuitaJapan
| | - Sadatsugu Sakane
- Department of Gastroenterology and HepatologyOsaka University Graduate School of MedicineSuitaJapan
| | - Olivier Govaere
- Translational and Clinical Research InstituteFaculty of Medical SciencesNewcastle UniversityNewcastle Upon TyneUnited Kingdom
| | - Simon Cockell
- Translational and Clinical Research InstituteFaculty of Medical SciencesNewcastle UniversityNewcastle Upon TyneUnited Kingdom
| | - Daisuke Motooka
- Genome Information Research CenterResearch Institute for Microbial DiseasesOsaka UniversitySuitaJapan
| | - Naruyasu Kakita
- Department of Gastroenterology and HepatologyKaizuka City HospitalOsakaJapan
| | - Yukinori Yamada
- Department of Gastroenterology and HepatologyKaizuka City HospitalOsakaJapan
| | - Yasuteru Kondo
- Department of HepatologySendai Kousei HospitalSendaiJapan
| | - Yuki Tahata
- Department of Gastroenterology and HepatologyOsaka University Graduate School of MedicineSuitaJapan
| | - Ryoko Yamada
- Department of Gastroenterology and HepatologyOsaka University Graduate School of MedicineSuitaJapan
| | - Hayato Hikita
- Department of Gastroenterology and HepatologyOsaka University Graduate School of MedicineSuitaJapan
| | - Ryotaro Sakamori
- Department of Gastroenterology and HepatologyOsaka University Graduate School of MedicineSuitaJapan
| | - Yoshihiro Kamada
- Department of Advanced Metabolic HepatologyOsaka University Graduate School of MedicineSuitaJapan
| | - Ann K. Daly
- Translational and Clinical Research InstituteFaculty of Medical SciencesNewcastle UniversityNewcastle Upon TyneUnited Kingdom
| | - Quentin M. Anstee
- Translational and Clinical Research InstituteFaculty of Medical SciencesNewcastle UniversityNewcastle Upon TyneUnited Kingdom,Newcastle National Institute for Health Research Biomedical Research CentreNewcastle Upon Tyne Hospitals National Health Service Foundation TrustNewcastle Upon TyneUnited Kingdom
| | - Tomohide Tatsumi
- Department of Gastroenterology and HepatologyOsaka University Graduate School of MedicineSuitaJapan
| | - Eiichi Morii
- Department of PathologyOsaka University Graduate School of MedicineOsakaJapan
| | - Tetsuo Takehara
- Department of Gastroenterology and HepatologyOsaka University Graduate School of MedicineSuitaJapan
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20
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Thiele M, Johansen S, Gudmann NS, Madsen B, Kjærgaard M, Nielsen MJ, Leeming DJ, Jacobsen S, Bendtsen F, Møller S, Detlefsen S, Karsdal M, Krag A. Progressive alcohol-related liver fibrosis is characterised by imbalanced collagen formation and degradation. Aliment Pharmacol Ther 2021; 54:1070-1080. [PMID: 34428307 PMCID: PMC9292476 DOI: 10.1111/apt.16567] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 02/09/2021] [Accepted: 08/01/2021] [Indexed: 12/18/2022]
Abstract
BACKGROUND Liver fibrosis accumulation is considered a turnover disease, with formation exceeding degradation, although this hypothesis has never been tested in humans. AIMS To investigate extracellular matrix (ECM) remodelling in a biopsy-controlled study of alcohol-related liver disease (ALD) patients. METHODS We evaluated the relationship between formation and degradation of four collagens as a function of histological fibrosis, inflammation and steatosis in 281 patients with ALD and 50 matched healthy controls. Post hoc, we tested the findings in a cohort of patients with alcohol-related cirrhosis and assessed the collagens' prognostic accuracy. We assessed the fibrillar collagens type III (PRO-C3/C3M) and V (PRO-C5/C5M), the basement membrane collagen IV (PRO-C4/C4M), and the microfilament interface collagen VI (PRO-C6/C6M). RESULTS Mean age was 54 ± 6 years, 74% male, fibrosis stage F0/1/2/3/4 = 33/98/84/18/48. Compared to controls, patients with ALD had higher levels of type III collagen formation and degradation, with the highest concentrations in those with cirrhosis (PRO-C3 = 8.2 ± 1.7 ng/mL in controls, 14.6 ± 13.5 in ALD, 34.8 ± 23.1 in cirrhosis; C3M 7.4 ± 1.9 in controls, 9.3 ± 4.4 in ALD, 14.0 ± 5 in cirrhosis). ECM remodelling became increasingly imbalanced in higher stages of liver fibrosis, with formation progressively superseding degradation. This was particularly pronounced for type III collagen. We observed similar imbalance for inflammatory severity, but not steatosis. CONCLUSIONS ALD is characterised by both elevated collagen formation and degradation, which becomes increasingly imbalanced with more severe disease. Net increase in fibrillar collagens contributes to fibrosis progression. This has important implications for monitoring and very early identification of patients at highest risk of progressing to cirrhosis.
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Affiliation(s)
- Maja Thiele
- Fibrosis, Fatty Liver and Steatohepatitis Research Centre Odense (FLASH)Department of Gastroenterology and HepatologyOdense University HospitalOdenseDenmark,Department of Clinical ResearchFaculty of Health SciencesUniversity of Southern DenmarkOdenseDenmark
| | - Stine Johansen
- Fibrosis, Fatty Liver and Steatohepatitis Research Centre Odense (FLASH)Department of Gastroenterology and HepatologyOdense University HospitalOdenseDenmark
| | | | - Bjørn Madsen
- Fibrosis, Fatty Liver and Steatohepatitis Research Centre Odense (FLASH)Department of Gastroenterology and HepatologyOdense University HospitalOdenseDenmark
| | - Maria Kjærgaard
- Fibrosis, Fatty Liver and Steatohepatitis Research Centre Odense (FLASH)Department of Gastroenterology and HepatologyOdense University HospitalOdenseDenmark
| | | | | | - Suganya Jacobsen
- Fibrosis, Fatty Liver and Steatohepatitis Research Centre Odense (FLASH)Department of Gastroenterology and HepatologyOdense University HospitalOdenseDenmark
| | - Flemming Bendtsen
- Gastro Unit, Medical SectionHvidovre University HospitalHvidovreDenmark,Department of Clinical MedicineFaculty of Health SciencesUniversity of CopenhagenHvidovreDenmark
| | - Søren Møller
- Department of Clinical MedicineFaculty of Health SciencesUniversity of CopenhagenHvidovreDenmark,Department of Clinical Physiology and Nuclear MedicineCentre for Functional and Diagnostic Imaging and ResearchHvidovre HospitalHvidovreDenmark
| | - Sönke Detlefsen
- Department of Clinical ResearchFaculty of Health SciencesUniversity of Southern DenmarkOdenseDenmark,Department of PathologyOdense University HospitalOdenseDenmark
| | - Morten Karsdal
- Nordic Bioscience A/SHerlevDenmark,Department of Molecular MedicineFaculty of Health SciencesUniversity of Southern DenmarkOdenseDenmark
| | - Aleksander Krag
- Fibrosis, Fatty Liver and Steatohepatitis Research Centre Odense (FLASH)Department of Gastroenterology and HepatologyOdense University HospitalOdenseDenmark,Department of Clinical ResearchFaculty of Health SciencesUniversity of Southern DenmarkOdenseDenmark
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21
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Evans WJ, Shankaran M, Smith EC, Morris C, Nyangau E, Bizieff A, Matthews M, Mohamed H, Hellerstein M. Profoundly lower muscle mass and rate of contractile protein synthesis in boys with Duchenne muscular dystrophy. J Physiol 2021; 599:5215-5227. [PMID: 34569076 DOI: 10.1113/jp282227] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2021] [Accepted: 09/15/2021] [Indexed: 12/29/2022] Open
Abstract
Boys with Duchenne muscular dystrophy (DMD) experience a progressive loss of functional muscle mass, with fibrosis and lipid accumulation. Accurate evaluation of whole-body functional muscle mass (MM) in DMD patients has not previously been possible and the rate of synthesis of muscle proteins remains unexplored. We used non-invasive, stable isotope-based methods from plasma and urine to measure the fractional rate of muscle protein synthesis (FSR) functional muscle mass (MM), and fat free mass (FFM) in 10 DMD (6-17 years) and 9 age-matched healthy subjects. An oral dose of D3 creatine in 70% 2 H2 O was administered to determine MM and FFM followed by daily 70% 2 H2 O to measure protein FSR. Functional MM was profoundly reduced in DMD subjects compared to controls (17% vs. 41% of body weight, P < 0.0001), particularly in older, non-ambulant patients in whom functional MM was extraordinarily low (<13% body weight). We explored the urine proteome to measure FSR of skeletal muscle-derived proteins. Titin, myosin light chain and gelsolin FSRs were substantially lower in DMD subjects compared to controls (27%, 11% and 40% of control, respectively, P < 0.0001) and were strongly correlated. There were no differences in muscle-derived sarcoplasmic proteins FSRs (creatine kinase M-type and carbonic anhydrase-3) measured in plasma. These data demonstrate that both functional MM, body composition and muscle protein synthesis rates can be quantified non-invasively and are markedly different between DMD and control subjects and suggest that the rate of contractile but not sarcoplasmic protein synthesis is affected by a lack of dystrophin. KEY POINTS: Duchenne muscular dystrophy (DMD) results in a progressive loss of functional skeletal muscle but total body functional muscle mass or rates of muscle protein synthesis have not previously been assessed in these patients. D3 -creatine dilution was used to measure total functional muscle mass and oral 2 H2 O was used to examine the rates of muscle protein synthesis non-invasively in boys with DMD and healthy controls using urine samples. Muscle mass was profoundly lower in DMD compared to control subjects, particularly in older, non-ambulant patients. The rates of contractile protein synthesis but not sarcoplasmic proteins were substantially lower in DMD. These results may provide non-invasive biomarkers for disease progression and therapeutic efficacy in DMD and other neuromuscular diseases.
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Affiliation(s)
- William J Evans
- Department of Nutritional Sciences and Toxicology, University of California, Berkeley, CA, USA.,Department of Medicine, Duke Medical Center, Durham, NC, USA
| | - Mahalakshmi Shankaran
- Department of Nutritional Sciences and Toxicology, University of California, Berkeley, CA, USA
| | - Edward C Smith
- Department of Pediatrics, Duke Medical Center, Durham, NC, USA
| | | | - Edna Nyangau
- Department of Nutritional Sciences and Toxicology, University of California, Berkeley, CA, USA
| | - Alec Bizieff
- Department of Nutritional Sciences and Toxicology, University of California, Berkeley, CA, USA
| | - Marcy Matthews
- Department of Nutritional Sciences and Toxicology, University of California, Berkeley, CA, USA
| | - Hussein Mohamed
- Department of Nutritional Sciences and Toxicology, University of California, Berkeley, CA, USA
| | - Marc Hellerstein
- Department of Nutritional Sciences and Toxicology, University of California, Berkeley, CA, USA
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22
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Beals JW, Smith GI, Shankaran M, Fuchs A, Schweitzer GG, Yoshino J, Field T, Matthews M, Nyangau E, Morozov D, Mittendorfer B, Hellerstein MK, Klein S. Increased Adipose Tissue Fibrogenesis, Not Impaired Expandability, Is Associated With Nonalcoholic Fatty Liver Disease. Hepatology 2021; 74:1287-1299. [PMID: 33743554 PMCID: PMC8559258 DOI: 10.1002/hep.31822] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 03/07/2021] [Accepted: 03/14/2021] [Indexed: 12/27/2022]
Abstract
BACKGROUND AND AIMS It is proposed that impaired expansion of subcutaneous adipose tissue (SAT) and an increase in adipose tissue (AT) fibrosis causes ectopic lipid accumulation, insulin resistance (IR), and metabolically unhealthy obesity. We therefore evaluated whether a decrease in SAT expandability, assessed by measuring SAT lipogenesis (triglyceride [TG] production), and an increase in SAT fibrogenesis (collagen production) are associated with NAFLD and IR in persons with obesity. APPROACH AND RESULTS In vivo abdominal SAT lipogenesis and fibrogenesis, expression of SAT genes involved in extracellular matrix (ECM) formation, and insulin sensitivity were assessed in three groups of participants stratified by adiposity and intrahepatic TG (IHTG) content: (1) healthy lean with normal IHTG content (Lean-NL; n = 12); (2) obese with normal IHTG content and normal glucose tolerance (Ob-NL; n = 25); and (3) obese with NAFLD and abnormal glucose metabolism (Ob-NAFLD; n = 25). Abdominal SAT TG synthesis rates were greater (P < 0.05) in both the Ob-NL (65.9 ± 4.6 g/wk) and Ob-NAFLD groups (71.1 ± 6.7 g/wk) than the Lean-NL group (16.2 ± 2.8 g/wk) without a difference between the Ob-NL and Ob-NAFLD groups. Abdominal SAT collagen synthesis rate and the composite expression of genes encoding collagens progressively increased from the Lean-NL to the Ob-NL to the Ob-NAFLD groups and were greater in the Ob-NAFLD than the Ob-NL group (P < 0.05). Composite expression of collagen genes was inversely correlated with both hepatic and whole-body insulin sensitivity (P < 0.001). CONCLUSIONS AT expandability is not impaired in persons with obesity and NAFLD. However, SAT fibrogenesis is greater in persons with obesity and NAFLD than in those with obesity and normal IHTG content, and is inversely correlated with both hepatic and whole-body insulin sensitivity.
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Affiliation(s)
- Joseph W. Beals
- Center for Human Nutrition and Atkins Center of Excellence in Obesity Medicine, Washington University School of Medicine, St Louis, MO
| | - Gordon I. Smith
- Center for Human Nutrition and Atkins Center of Excellence in Obesity Medicine, Washington University School of Medicine, St Louis, MO
| | | | - Anja Fuchs
- Department of Surgery, Washington University School of Medicine, St Louis, MO
| | - George G. Schweitzer
- Center for Human Nutrition and Atkins Center of Excellence in Obesity Medicine, Washington University School of Medicine, St Louis, MO
| | - Jun Yoshino
- Center for Human Nutrition and Atkins Center of Excellence in Obesity Medicine, Washington University School of Medicine, St Louis, MO
| | - Tyler Field
- University of California Berkeley, Berkeley, CA
| | | | | | - Darya Morozov
- Department of Radiology, Washington University School of Medicine, St Louis, MO
| | - Bettina Mittendorfer
- Center for Human Nutrition and Atkins Center of Excellence in Obesity Medicine, Washington University School of Medicine, St Louis, MO
| | | | - Samuel Klein
- Center for Human Nutrition and Atkins Center of Excellence in Obesity Medicine, Washington University School of Medicine, St Louis, MO
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23
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He W, Huang C, Zhang X, Wang D, Chen Y, Zhao Y, Li X. Identification of transcriptomic signatures and crucial pathways involved in non-alcoholic steatohepatitis. Endocrine 2021; 73:52-64. [PMID: 33837926 DOI: 10.1007/s12020-021-02716-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Accepted: 03/25/2021] [Indexed: 02/08/2023]
Abstract
PURPOSE Our study aimed to uncover the crucial genes and functional pathways involved in the development of non-alcoholic steatohepatitis (NASH). METHODS Liver transcriptome datasets were integrated with Robust rank aggregation (RRA) method, and transcriptomic signatures for NASH progression and fibrosis severity in NAFLD were developed. The functions of transcriptomic signatures were explored by multiple bioinformatic analyses, and their diagnostic role was also evaluated. RESULTS RRA analyses of 12 transcriptome datasets comparing NASH with non-alcoholic fatty liver (NAFL) identified 116 abnormally up-regulated genes in NASH patients. RRA analyses of five transcriptome datasets focusing fibrosis severity identified 78 abnormally up-regulated genes in NAFLD patients with advanced fibrosis. The functions of those transcriptomic signatures of NASH development or fibrosis progression were similar, and were both characterized by extracellular matrix (ECM)-related pathways (Adjusted P < 0.05). The transcriptomic signatures could effectively differentiate NASH from NAFL, and could help to identify NAFLD patients with advanced fibrosis. Gene set enrichment analysis and weighted gene co-expression network analysis further validated the key role of ECM-related pathways in NASH development. The top 10 up-regulated genes in NASH patients were SPP1, FBLN5, CHI3L1, CCL20, CD24, FABP4, GPNMB, VCAN, EFEMP1, and CXCL10, and their functions were mainly related to either ECM-related pathways or immunity-related pathways. Single cell RNA-sequencing analyses revealed that those crucial genes were expressed by distinct cells such as hepatocytes, macrophages, and hepatic stellate cells. CONCLUSIONS Transcriptomic signatures related to NASH development and fibrosis severity of NAFLD patients are both characterized by ECM-related pathways, and fibrosis is a main player during NASH progression. This study uncovers some novel key genes involved in NASH progression, which may be promising therapeutic targets.
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Affiliation(s)
- Weiwei He
- School of Medicine, Xiamen University, Xiamen, China
- Xiamen Diabetes Institute, The First Affiliated Hospital of Xiamen University, Xiamen, China
- Fujian Provincial Key Laboratory of Translational Medicine for Diabetes, Xiamen, China
| | - Caoxin Huang
- Xiamen Diabetes Institute, The First Affiliated Hospital of Xiamen University, Xiamen, China
- Fujian Provincial Key Laboratory of Translational Medicine for Diabetes, Xiamen, China
| | - Xiaofang Zhang
- Xiamen Diabetes Institute, The First Affiliated Hospital of Xiamen University, Xiamen, China
- Fujian Provincial Key Laboratory of Translational Medicine for Diabetes, Xiamen, China
| | - Dongmei Wang
- School of Medicine, Xiamen University, Xiamen, China
- Xiamen Diabetes Institute, The First Affiliated Hospital of Xiamen University, Xiamen, China
- Fujian Provincial Key Laboratory of Translational Medicine for Diabetes, Xiamen, China
| | - Yinling Chen
- School of Medicine, Xiamen University, Xiamen, China
- Xiamen Diabetes Institute, The First Affiliated Hospital of Xiamen University, Xiamen, China
- Fujian Provincial Key Laboratory of Translational Medicine for Diabetes, Xiamen, China
| | - Yan Zhao
- Xiamen Diabetes Institute, The First Affiliated Hospital of Xiamen University, Xiamen, China.
- Fujian Provincial Key Laboratory of Translational Medicine for Diabetes, Xiamen, China.
| | - Xuejun Li
- Xiamen Diabetes Institute, The First Affiliated Hospital of Xiamen University, Xiamen, China.
- Fujian Provincial Key Laboratory of Translational Medicine for Diabetes, Xiamen, China.
- Department of Endocrinology and Diabetes, The First Affiliated Hospital of Xiamen University, Xiamen, China.
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24
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Peters DC, Markovic S, Bao Q, Preise D, Sasson K, Agemy L, Scherz A, Frydman L. Improving deuterium metabolic imaging (DMI) signal-to-noise ratio by spectroscopic multi-echo bSSFP: A pancreatic cancer investigation. Magn Reson Med 2021; 86:2604-2617. [PMID: 34196041 DOI: 10.1002/mrm.28906] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 06/07/2021] [Accepted: 06/07/2021] [Indexed: 12/15/2022]
Abstract
PURPOSE Deuterium metabolic imaging (DMI) maps the uptake of deuterated precursors and their conversion into lactate and other markers of tumor metabolism. Even after leveraging 2 H's short T1 s, DMI's signal-to-noise ratio (SNR) is limited. We hypothesize that a multi-echo balanced steady-state free precession (ME-bSSFP) approach would increase SNR compared to chemical shift imaging (CSI), while achieving spectral isolation of the metabolic precursors and products. METHODS Suitably tuned 2 H ME-bSSFP (five echo times [TEs], ΔTE = 2.2 ms, repetition time [TR]/flip-angle = 12 ms/60°) was implemented at 15.2T and compared to CSI (TR/flip-angle = 95 ms/90°) regarding SNR and spectral isolation, in simulations, in deuterated phantoms and for the in vivo diagnosis of a mouse tumor model of pancreatic adenocarcinoma (N = 10). RESULTS Simulations predicted an SNR increase vs. CSI of 3-5, and that the peaks of 2 H-water, 2 H6,6' -glucose, and 2 H3,3' -lactate can be well isolated by ME-bSSFP; phantoms confirmed this. In vivo, at equal spatial resolution (1.25 × 1.25 mm2 ) and scan time (10 min), 2 H6,6' -glucose's and 2 H3,3' -lactate's SNR were indeed higher for bSSFP than for CSI, three-fold for glucose (57 ± 30 vs. 19 ± 11, P < .001), doubled for water (13 ± 5 vs. 7 ± 3, P = .005). The time courses and overall localization of all metabolites agreed well, comparing CSI against ME-bSSFP. However, a clearer localization of glucose in kidneys and bladder, the detection of glucose-avid rims in certain tumors, and a heterogeneous pattern of intra-tumor lactate production could only be observed using ME-bSSFP's higher resolution. CONCLUSIONS ME-bSSFP provides greater SNR per unit time than CSI, providing for higher spatial resolution mapping of glucose uptake and lactate production in tumors.
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Affiliation(s)
- Dana C Peters
- Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, Connecticut, USA
| | - Stefan Markovic
- Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, Israel
| | - Qingjia Bao
- Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, Israel
| | - Dina Preise
- Department of Life Sciences Core Facilities, Weizmann Institute of Science, Rehovot, Israel
| | - Keren Sasson
- Department of Life Sciences Core Facilities, Weizmann Institute of Science, Rehovot, Israel
| | - Lilach Agemy
- Department of Plant and Environmental Science, Weizmann Institute of Science, Rehovot, Israel
| | - Avigdor Scherz
- Department of Plant and Environmental Science, Weizmann Institute of Science, Rehovot, Israel
| | - Lucio Frydman
- Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, Israel
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25
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Biglycan: A regulator of hepatorenal inflammation and autophagy. Matrix Biol 2021; 100-101:150-161. [DOI: 10.1016/j.matbio.2021.06.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 06/03/2021] [Accepted: 06/04/2021] [Indexed: 02/07/2023]
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Budi EH, Schaub JR, Decaris M, Turner S, Derynck R. TGF-β as a driver of fibrosis: physiological roles and therapeutic opportunities. J Pathol 2021; 254:358-373. [PMID: 33834494 DOI: 10.1002/path.5680] [Citation(s) in RCA: 100] [Impact Index Per Article: 33.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 04/06/2021] [Accepted: 04/07/2021] [Indexed: 02/06/2023]
Abstract
Many chronic diseases are marked by fibrosis, which is defined by an abundance of activated fibroblasts and excessive deposition of extracellular matrix, resulting in loss of normal function of the affected organs. The initiation and progression of fibrosis are elaborated by pro-fibrotic cytokines, the most critical of which is transforming growth factor-β1 (TGF-β1). This review focuses on the fibrogenic roles of increased TGF-β activities and underlying signaling mechanisms in the activated fibroblast population and other cell types that contribute to progression of fibrosis. Insight into these roles and mechanisms of TGF-β as a universal driver of fibrosis has stimulated the development of therapeutic interventions to attenuate fibrosis progression, based on interference with TGF-β signaling. Their promise in preclinical and clinical settings will be discussed. © 2021 The Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
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Affiliation(s)
- Erine H Budi
- Pliant Therapeutics Inc, South San Francisco, CA, USA
| | | | | | - Scott Turner
- Pliant Therapeutics Inc, South San Francisco, CA, USA
| | - Rik Derynck
- Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, and Department of Cell and Tissue Biology, University of California at San Francisco, San Francisco, CA, USA
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27
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De Feyter HM, de Graaf RA. Deuterium metabolic imaging - Back to the future. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2021; 326:106932. [PMID: 33902815 PMCID: PMC8083995 DOI: 10.1016/j.jmr.2021.106932] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 01/29/2021] [Accepted: 02/02/2021] [Indexed: 05/07/2023]
Abstract
Deuterium metabolic spectroscopy (DMS) and imaging (DMI) have recently been described as simple and robust MR-based methods to map metabolism with high temporal and/or spatial resolution. The metabolic fate of a wide range of suitable deuterated substrates, including glucose and acetate, can be monitored with deuterium MR methods in which the favorable MR characteristics of deuterium prevent many of the complications that hamper other techniques. The short T1 relaxation times lead to good MR sensitivity, while the low natural abundance prevents the need for water or lipid suppression. The sparsity of the deuterium spectra in combination with the low resonance frequency provides relative immunity to magnetic field inhomogeneity. Taken together, these features combine into a highly robust metabolic imaging method that has strong potential to become a dominant MR research tool and a viable clinical imaging modality. This perspective reviews the history of deuterium as a metabolic tracer, the use of NMR as a detection method for deuterium in vitro and in vivo and the recent development of DMS and DMI. Following a review of the NMR characteristics and the biological effects of deuterium, the promising future of DMI is outlined.
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Affiliation(s)
- Henk M De Feyter
- Departments of Radiology and Biomedical Imaging, Magnetic Resonance Research Center, Yale University School of Medicine, New Haven, CT, USA.
| | - Robin A de Graaf
- Departments of Radiology and Biomedical Imaging, Magnetic Resonance Research Center, Yale University School of Medicine, New Haven, CT, USA.
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28
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Ting Soon GS, Wee A. Liver biopsy in the quantitative assessment of liver fibrosis in nonalcoholic fatty liver disease. INDIAN J PATHOL MICR 2021; 64:S104-S111. [PMID: 34135151 DOI: 10.4103/ijpm.ijpm_947_20] [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: 11/04/2022] Open
Abstract
Nonalcoholic fatty liver disease/nonalcoholic steatohepatitis (NAFLD/NASH) is a major cause of liver fibrosis/cirrhosis and liver-related mortality. Despite emergence of noninvasive tests, liver biopsy remains the mainstay for the diagnosis and assessment of disease severity and chronicity. Accurate detection and quantification of liver fibrosis with architectural localization are essential for assessing the severity of NAFLD and its response to antifibrotic therapy in clinical trials. Conventional histological scoring systems for liver fibrosis are semiquantitative. Collagen proportionate area is morphometric by measuring the percentage of fibrosis on a continuous scale but is limited by the absence of architectural input. Ultra-fast laser microscopy, e.g., second harmonic generation (SHG) imaging, has enabled in-depth analysis of fibrillary collagen based on intrinsic optical signals. Quantification and calculation of different detailed variables of collagen fibers can be used to establish algorithm-based quantitative fibrosis scores (e.g. qFibrosis, q-FPs) in NAFLD. Artificial intelligence is being explored to further develop quantitative fibrosis scoring methods. SHG microscopy should be considered the new gold standard for the quantitative assessment of liver fibrosis, reaffirming the pivotal role of the liver biopsy in NAFLD, at least for the near-future. The ability of SHG-derived algorithms to intuitively detect subtle nuances in liver fibrosis changes over a continuous scale should be employed to redress the efficacy endpoint for fibrosis in NASH clinical trials. The current decrease by 1-point or more in fibrosis stage may not be realistic for the evaluation of therapeutic response to antifibrotic drugs in relatively short-term trials.
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Affiliation(s)
| | - Aileen Wee
- Department of Pathology, National University Hospital, Singapore
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Soon G, Wee A. Updates in the quantitative assessment of liver fibrosis for nonalcoholic fatty liver disease: Histological perspective. Clin Mol Hepatol 2020; 27:44-57. [PMID: 33207115 PMCID: PMC7820194 DOI: 10.3350/cmh.2020.0181] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 08/26/2020] [Indexed: 12/12/2022] Open
Abstract
Nonalcoholic fatty liver disease/nonalcoholic steatohepatitis (NAFLD/NASH) is a major cause of liver fibrosis and cirrhosis. Accurate assessment of liver fibrosis is important for predicting disease outcomes and assessing therapeutic response in clinical practice and clinical trials. Although noninvasive tests such as transient elastography and magnetic resonance elastography are preferred where possible, histological assessment of liver fibrosis via semiquantitative scoring systems remains the current gold standard. Collagen proportionate area provides more granularity by measuring the percentage of fibrosis on a continuous scale, but is limited by the absence of architectural input. Although not yet used in routine clinical practice, advances in second harmonic generation/two-photon excitation fluorescence (SHG/TPEF) microscopy imaging show great promise in characterising architectural features of fibrosis at the individual collagen fiber level. Quantification and calculation of different detailed variables of collagen fibers can be used to establish algorithm-based quantitative fibrosis scores (e.g., qFibrosis, q-FPs), which have been validated against fibrosis stage in NAFLD. Artificial intelligence is being explored to further refine and develop quantitative fibrosis scoring methods. SHG-microscopy shows promise as the new gold standard for the quantitative measurement of liver fibrosis. This has reaffirmed the pivotal role of the liver biopsy in fibrosis assessment in NAFLD, at least for the near-future. The ability of SHG-derived algorithms to intuitively detect subtle nuances in liver fibrosis changes over a continuous scale should be employed to redress the efficacy endpoint for fibrosis in NASH clinical trials; this approach may improve the outcomes of the trials evaluating therapeutic response to antifibrotic drugs.
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Affiliation(s)
- Gwyneth Soon
- Department of Pathology, National University Hospital, Singapore, Singapore
| | - Aileen Wee
- Department of Pathology, National University Hospital, Singapore, Singapore.,Department of Pathology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
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Karamfilova V, Gateva A, Assyov Y, Nedeva I, Velikova T, Cherkezov N, Mateva L, Kamenov Z. Lumican in Obese Patients with Nonalcoholic Fatty Liver Disease With or Without Prediabetes. Metab Syndr Relat Disord 2020; 18:443-448. [PMID: 32780624 DOI: 10.1089/met.2020.0001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Affiliation(s)
- Vera Karamfilova
- Department of Internal Medicine, Clinic of Endocrinology and Metabolic Diseases, University Hospital “Alexandrovska,” Medical University, Sofia, Bulgaria
| | - Antoaneta Gateva
- Department of Internal Medicine, Clinic of Endocrinology and Metabolic Diseases, University Hospital “Alexandrovska,” Medical University, Sofia, Bulgaria
| | - Yavor Assyov
- Department of Internal Medicine, Clinic of Endocrinology and Metabolic Diseases, University Hospital “Alexandrovska,” Medical University, Sofia, Bulgaria
| | - Iveta Nedeva
- Department of Internal Medicine, Clinic of Endocrinology and Metabolic Diseases, University Hospital “Alexandrovska,” Medical University, Sofia, Bulgaria
| | - Tsvetelina Velikova
- Department of Clinical Immunology, University Hospital Lozenetz, Sofia, Bulgaria
| | | | - Ludmila Mateva
- Department of Internal Medicine, Clinic of Gastroenterology, University Hospital “St. Ivan Rilski,” Medical University, Sofia, Bulgaria
| | - Zdravko Kamenov
- Department of Internal Medicine, Clinic of Endocrinology and Metabolic Diseases, University Hospital “Alexandrovska,” Medical University, Sofia, Bulgaria
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31
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Mandala A, Janssen RC, Palle S, Short KR, Friedman JE. Pediatric Non-Alcoholic Fatty Liver Disease: Nutritional Origins and Potential Molecular Mechanisms. Nutrients 2020; 12:E3166. [PMID: 33081177 PMCID: PMC7602751 DOI: 10.3390/nu12103166] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 10/12/2020] [Accepted: 10/13/2020] [Indexed: 02/06/2023] Open
Abstract
Non-alcoholic fatty liver disease (NAFLD) is the number one chronic liver disease worldwide and is estimated to affect nearly 40% of obese youth and up to 10% of the general pediatric population without any obvious signs or symptoms. Although the early stages of NAFLD are reversible with diet and lifestyle modifications, detecting such stages is hindered by a lack of non-invasive methods of risk assessment and diagnosis. This absence of non-invasive means of diagnosis is directly related to the scarcity of long-term prospective studies of pediatric NAFLD in children and adolescents. In the majority of pediatric NAFLD cases, the mechanisms driving the origin and rapid progression of NAFLD remain unknown. The progression from NAFLD to non-alcoholic steatohepatitis (NASH) in youth is associated with unique histological features and possible immune processes and metabolic pathways that may reflect different mechanisms compared with adults. Recent data suggest that circulating microRNAs (miRNAs) are important new biomarkers underlying pathways of liver injury. Several factors may contribute to pediatric NAFLD development, including high-sugar diets, in utero exposures via epigenetic alterations, changes in the neonatal microbiome, and altered immune system development and mitochondrial function. This review focuses on the unique aspects of pediatric NAFLD and how nutritional exposures impact the immune system, mitochondria, and liver/gastrointestinal metabolic health. These factors highlight the need for answers to how NAFLD develops in children and for early stage-specific interventions.
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Affiliation(s)
- Ashok Mandala
- Harold Hamm Diabetes Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; (A.M.); (R.C.J.); (K.R.S.)
| | - Rachel C. Janssen
- Harold Hamm Diabetes Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; (A.M.); (R.C.J.); (K.R.S.)
| | - Sirish Palle
- Department of Pediatrics, Section of Gastroenterology, Hepatology & Nutrition, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA;
| | - Kevin R. Short
- Harold Hamm Diabetes Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; (A.M.); (R.C.J.); (K.R.S.)
- Department of Pediatrics, Section of Diabetes and Endocrinology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
- Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
| | - Jacob E. Friedman
- Harold Hamm Diabetes Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA; (A.M.); (R.C.J.); (K.R.S.)
- Department of Pediatrics, Section of Diabetes and Endocrinology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
- Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
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32
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Sven M F, Pierre B, Manal F A, Quentin M A, Elisabetta B, Vlad R, Philippe HM, Bruno S, Jean-Louis J, Pierre B, Jean-Louis A. A randomised, double-blind, placebo-controlled, multi-centre, dose-range, proof-of-concept, 24-week treatment study of lanifibranor in adult subjects with non-alcoholic steatohepatitis: Design of the NATIVE study. Contemp Clin Trials 2020; 98:106170. [PMID: 33038502 DOI: 10.1016/j.cct.2020.106170] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 08/10/2020] [Accepted: 08/27/2020] [Indexed: 12/17/2022]
Abstract
Background Non-alcoholic steatohepatitis (NASH), a multifactorial disease, can progress to hepatic fibrosis and cirrhosis. The Peroxysomal Proliferator-Activated Receptors, PPARα, β/δ and γ, play a central role in the regulation of glucose and lipid metabolism and of the inflammatory and fibrogenic pathways in liver and in other organs that all contribute to NASH pathogenesis. Lanifibranor (IVA337), a panPPAR agonist, by acting on these three different PPAR isotypes, combines pharmacological effects that could address the different components of the disease as demonstrated in preclinical models. Objectives NATIVE study (EudraCT: 2016-001979-70, NCT: NCT03008070) aims to assess the safety and the efficacy of a 24-week treatment with lanifibranor (800 and 1200 mg/day) in adult non-cirrhotic NASH patients. The primary efficacy endpoint is a 2-point reduction in the activity part of the Steatosis Activity Fibrosis (SAF) histological score (combining inflammation and ballooning) without worsening of fibrosis. Design NATIVE is a Phase 2b randomised, placebo-controlled, double-blind, parallel-assignment, dose-range study. Eligible adult patients with a confirmed histological diagnosis of NASH should have a SAF Activity score of 3 or 4 (>2) and a SAF Steatosis score ≥ 1. There is no specific criterion related to the fibrosis score except that patients with cirrhosis (F4) were excluded. Summary This study will evaluate the efficacy of a 24-week treatment of NASH with lanifibranor based on histological evaluations (SAF score) by biopsy. The number of responders according to the SAF Activity score-based definition from baseline to 24 weeks will be compared between groups and serves as primary endpoint.
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Affiliation(s)
- Francque Sven M
- Department of Gastroenterology and Hepatology, Antwerp University Hospital, Drie Eikenstraat 655, B-2650 Edegem, 2610 Wilrijk, Belgium; Laboratory of Experimental Medicine and Paediatrics, Faculty of Medicine and Health Sciences, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium.
| | - Bedossa Pierre
- Liverpat, 28 rue de l'Amiral Hamelin, 75116 Paris, France.; Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle, Upon Tyne, UK
| | - Abdelmalek Manal F
- Division of Gastroenterology and Hepatology, Duke University, 40 Duke Medicine Circle, Durham, NC 27710, USA
| | - Anstee Quentin M
- Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle, Upon Tyne, UK; Newcastle NIHR Biomedical Research Centre, Newcastle upon Tyne, UK; Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - Bugianesi Elisabetta
- Division of Gastroenterology and Hepatology, Department of Medical Sciences, University of Torino, A.O. Città della Salute e della Scienza di Torino, Corso Bramante, 88 I-10126 Torino, Italy
| | - Ratziu Vlad
- AP-HP Hopital Pitié-Salpetrière, 47 Boulevard de L'Hôpital, 75013 Paris, France
| | | | - Scherrer Bruno
- Bruno Scherrer Conseil S.A.R.L., 15 rue Beethoven, 78730 Saint Arnoult en Yvelines, France
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Han H, Desert R, Das S, Song Z, Athavale D, Ge X, Nieto N. Danger signals in liver injury and restoration of homeostasis. J Hepatol 2020; 73:933-951. [PMID: 32371195 PMCID: PMC7502511 DOI: 10.1016/j.jhep.2020.04.033] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 04/08/2020] [Accepted: 04/23/2020] [Indexed: 02/06/2023]
Abstract
Damage-associated molecular patterns are signalling molecules involved in inflammatory responses and restoration of homeostasis. Chronic release of these molecules can also promote inflammation in the context of liver disease. Herein, we provide a comprehensive summary of the role of damage-associated molecular patterns as danger signals in liver injury. We consider the role of reactive oxygen species and reactive nitrogen species as inducers of damage-associated molecular patterns, as well as how specific damage-associated molecular patterns participate in the pathogenesis of chronic liver diseases such as alcohol-related liver disease, non-alcoholic steatohepatitis, liver fibrosis and liver cancer. In addition, we discuss the role of damage-associated molecular patterns in ischaemia reperfusion injury and liver transplantation and highlight current studies in which blockade of specific damage-associated molecular patterns has proven beneficial in humans and mice.
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Affiliation(s)
- Hui Han
- Department of Pathology, University of Illinois at Chicago, 840 S. Wood St., Suite 130 CSN, MC 847, Chicago, IL 60612, USA
| | - Romain Desert
- Department of Pathology, University of Illinois at Chicago, 840 S. Wood St., Suite 130 CSN, MC 847, Chicago, IL 60612, USA
| | - Sukanta Das
- Department of Pathology, University of Illinois at Chicago, 840 S. Wood St., Suite 130 CSN, MC 847, Chicago, IL 60612, USA
| | - Zhuolun Song
- Department of Pathology, University of Illinois at Chicago, 840 S. Wood St., Suite 130 CSN, MC 847, Chicago, IL 60612, USA
| | - Dipti Athavale
- Department of Pathology, University of Illinois at Chicago, 840 S. Wood St., Suite 130 CSN, MC 847, Chicago, IL 60612, USA
| | - Xiaodong Ge
- Department of Pathology, University of Illinois at Chicago, 840 S. Wood St., Suite 130 CSN, MC 847, Chicago, IL 60612, USA
| | - Natalia Nieto
- Department of Pathology, University of Illinois at Chicago, 840 S. Wood St., Suite 130 CSN, MC 847, Chicago, IL 60612, USA; Division of Gastroenterology and Hepatology, Department of Medicine, University of Illinois at Chicago, 840 S. Wood St., Suite 1020N, MC 787, Chicago, IL 60612, USA.
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Loomba R, Decaris M, Li KW, Shankaran M, Mohammed H, Matthews M, Richards LM, Nguyen P, Rizo E, Andrews B, Soto R, Angel T, Suri V, Kitrinos KM, Barnes D, Czerwieniec G, Brendza K, Subramanian GM, Gaggar A, Hellerstein MK. Discovery of Half-life of Circulating Hepatitis B Surface Antigen in Patients With Chronic Hepatitis B Infection Using Heavy Water Labeling. Clin Infect Dis 2020; 69:542-545. [PMID: 30590481 DOI: 10.1093/cid/ciy1100] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Accepted: 12/22/2018] [Indexed: 01/05/2023] Open
Abstract
In a pilot study, heavy water labeling was used to determine hepatitis B surface antigen (HBsAg) turnover rates in chronic hepatitis B (CHB) patients. The mean (standard deviation) half-life of HBsAg in blood was 6.7 (5.5) days, which reflects recent production in the liver and supports strategies aimed at reducing HBsAg production in CHB patients.
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Affiliation(s)
- Rohit Loomba
- NAFLD Research Center, University of California, San Diego, La Jolla
| | | | - Kelvin W Li
- KineMed, Inc., Emeryville
- Department of Nutritional Sciences and Toxicology, University of California Berkeley
| | - Mahalakshmi Shankaran
- Department of Nutritional Sciences and Toxicology, University of California Berkeley
| | - Hussein Mohammed
- KineMed, Inc., Emeryville
- Department of Nutritional Sciences and Toxicology, University of California Berkeley
| | - Marcy Matthews
- KineMed, Inc., Emeryville
- Department of Nutritional Sciences and Toxicology, University of California Berkeley
| | - Lisa M Richards
- NAFLD Research Center, University of California, San Diego, La Jolla
| | - Phirum Nguyen
- NAFLD Research Center, University of California, San Diego, La Jolla
| | - Emily Rizo
- NAFLD Research Center, University of California, San Diego, La Jolla
| | - Barbara Andrews
- NAFLD Research Center, University of California, San Diego, La Jolla
| | - Robin Soto
- NAFLD Research Center, University of California, San Diego, La Jolla
| | - Thomas Angel
- Department of Nutritional Sciences and Toxicology, University of California Berkeley
| | - Vithika Suri
- Clinical Research, Inc., Foster City, California
| | | | - Dwight Barnes
- Biology, Gilead Sciences, Inc., Foster City, California
| | | | - Kathy Brendza
- Biology, Gilead Sciences, Inc., Foster City, California
| | | | - Anuj Gaggar
- Clinical Research, Inc., Foster City, California
| | - Marc K Hellerstein
- KineMed, Inc., Emeryville
- Department of Nutritional Sciences and Toxicology, University of California Berkeley
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Loomba R, Adams LA. Advances in non-invasive assessment of hepatic fibrosis. Gut 2020; 69:1343-1352. [PMID: 32066623 PMCID: PMC7945956 DOI: 10.1136/gutjnl-2018-317593] [Citation(s) in RCA: 184] [Impact Index Per Article: 46.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 01/27/2020] [Accepted: 01/28/2020] [Indexed: 12/14/2022]
Abstract
Liver fibrosis should be assessed in all individuals with chronic liver disease as it predicts the risk of future liver-related morbidity and thus need for treatment, monitoring and surveillance. Non-invasive fibrosis tests (NITs) overcome many limitations of liver biopsy and are now routinely incorporated into specialist clinical practice. Simple serum-based tests (eg, Fibrosis Score 4, non-alcoholic fatty liver disease Fibrosis Score) consist of readily available biochemical surrogates and clinical risk factors for liver fibrosis (eg, age and sex). These have been extensively validated across a spectrum of chronic liver diseases, however, tend to be less accurate than more 'complex' serum tests, which incorporate direct measures of fibrogenesis or fibrolysis (eg, hyaluronic acid, N-terminal propeptide of type three collagen). Elastography methods quantify liver stiffness as a marker of fibrosis and are more accurate than simple serum NITs, however, suffer increasing rates of unreliability with increasing obesity. MR elastography appears more accurate than sonographic elastography and is not significantly impacted by obesity but is costly with limited availability. NITs are valuable for excluding advanced fibrosis or cirrhosis, however, are not sufficiently predictive when used in isolation. Combining serum and elastography techniques increases diagnostic accuracy and can be used as screening and confirmatory tests, respectively. Unfortunately, NITs have not yet been demonstrated to accurately reflect fibrosis change in response to treatment, limiting their role in disease monitoring. However, recent studies have demonstrated lipidomic, proteomic and gut microbiome profiles as well as microRNA signatures to be promising techniques for fibrosis assessment in the future.
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Affiliation(s)
- Rohit Loomba
- NAFLD Research Center, Division of Gastroenterology and Epidemiology, University of California at San Diego, La Jolla, California, USA
| | - Leon A Adams
- Medicine and Pharmacology, The University of Western Australia, Nedlands, Western Australia, Australia
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Albhaisi S, Sanyal AJ. Applying Non-Invasive Fibrosis Measurements in NAFLD/NASH: Progress to Date. Pharmaceut Med 2020; 33:451-463. [PMID: 31933238 DOI: 10.1007/s40290-019-00305-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Nonalcoholic fatty liver disease (NAFLD) has now become a worldwide health issue due to the obesity epidemic, affecting approximately 90% of the obese population and 15-40% of the general population. It is the most common form of chronic liver disease in the United States. NAFLD constitutes a spectrum of diseases ranging in severity from mild, such as fatty liver, progressing into nonalcoholic steatohepatitis (NASH), then fibrosis, and ending with cirrhosis. NASH and increasing fibrosis stage are associated with increased morbidity and mortality; the fibrosis stage is therefore a critical element of risk stratification needed to determine therapeutic approach and also the response to treatment. Liver biopsy is considered the 'gold standard' in the diagnosis of NAFLD. However, it is not practical for widespread clinical use because it is invasive, costly, and associated with complications including occasional death. These limitations have driven the development of noninvasive tests that can accurately predict the fibrosis stage in those with NAFLD. In this review, we provide a concise overview of different non-invasive measurements used for NAFLD/NASH.
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Affiliation(s)
- Somaya Albhaisi
- Department of Internal Medicine, Virginia Commonwealth University, Box 980102, Richmond, VA, 23298, USA
| | - Arun J Sanyal
- Division of Gastroenterology, Hepatology and Nutrition, Department of Internal Medicine, Virginia Commonwealth University, Box 980341, Richmond, VA, 23298, USA.
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Liu HF, Wang Q, Du YN, Zhu ZH, Li YF, Zou LQ, Xing W. Dynamic contrast-enhanced MRI with Gd-EOB-DTPA for the quantitative assessment of early-stage liver fibrosis induced by carbon tetrachloride in rabbits. Magn Reson Imaging 2020; 70:57-63. [PMID: 32325235 DOI: 10.1016/j.mri.2020.04.010] [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: 02/28/2020] [Revised: 03/31/2020] [Accepted: 04/15/2020] [Indexed: 02/07/2023]
Abstract
PURPOSE To explore quantitative parameters obtained by dynamic contrast-enhanced magnetic resonance imaging (DCE MRI) with Gd-EOB-DTPA in discriminating early-stage liver fibrosis (LF) in a rabbit model. MATERIALS AND METHODS LF was established in 60 rabbits by the injection of 50% CCl4 oil solution, whereas 30 rabbits served as the control group. All rabbits underwent pathological examination to determine the LF stage using the METAVIR classification system. DCE MRI was performed, and quantitative parameters, including Ktrans, Kep, Ve, Vp and Re were measured and evaluated among the different LF stages using spearman correlation coefficients and receiver operating characteristic curve. RESULTS In all, 24, 25, and 22 rabbits had stage F0, stage F1, and stage F2 LF, respectively. Ktrans (r = 0.803) increased, and Kep (r = -0.495) and Re (r = -0.701) decreased with LF stage progression (P < 0.001), while no significant correlation was found for Ve or Vp. Ktrans and Re were significantly different between all LF stage pairs compared (F0 vs. F1, F0 vs. F2, F1 vs. F2, F0 vs. F1-F2, P < 0.05). With the exception of F0 vs. F1, Kep differed significantly between stages (P < 0.05). The AUC of Ktrans was higher than that of other quantitative parameters, with an AUC of 0.92, 0.99, 0.94 and 0.92 for staging F0 vs. F1, F0 vs. F2, F1 vs. F2, and F0 vs. F1-F2, respectively. CONCLUSION Among quantitative parameters of Gd-EOB-DTPA DCE MRI, Ktrans was the best predictor for quantitatively differentiating early-stage LF.
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Affiliation(s)
- Hai-Feng Liu
- Department of Radiology, Third Affiliated Hospital of Soochow University & Changzhou First People's Hospital, Changzhou 213003, Jiangsu, China
| | - Qing Wang
- Department of Radiology, Third Affiliated Hospital of Soochow University & Changzhou First People's Hospital, Changzhou 213003, Jiangsu, China
| | - Ya-Nan Du
- Department of Radiology, Third Affiliated Hospital of Soochow University & Changzhou First People's Hospital, Changzhou 213003, Jiangsu, China
| | - Zu-Hui Zhu
- Department of Radiology, Third Affiliated Hospital of Soochow University & Changzhou First People's Hospital, Changzhou 213003, Jiangsu, China
| | - Yu-Feng Li
- Department of Radiology, Third Affiliated Hospital of Soochow University & Changzhou First People's Hospital, Changzhou 213003, Jiangsu, China
| | - Li-Qiu Zou
- Department of Radiology, The Sixth Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen 518052, China.
| | - Wei Xing
- Department of Radiology, Third Affiliated Hospital of Soochow University & Changzhou First People's Hospital, Changzhou 213003, Jiangsu, China
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Guzmán-Ruiz R, Tercero-Alcázar C, Rabanal-Ruiz Y, Díaz-Ruiz A, El Bekay R, Rangel-Zuñiga OA, Navarro-Ruiz MC, Molero L, Membrives A, Ruiz-Rabelo JF, Pandit A, López-Miranda J, Tinahones FJ, Malagón MM. Adipose tissue depot-specific intracellular and extracellular cues contributing to insulin resistance in obese individuals. FASEB J 2020; 34:7520-7539. [PMID: 32293066 PMCID: PMC7384030 DOI: 10.1096/fj.201902703r] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2019] [Revised: 03/10/2020] [Accepted: 03/22/2020] [Indexed: 12/12/2022]
Abstract
Adipose tissue dysregulation in obesity strongly influences systemic metabolic homeostasis and is often linked to insulin resistance (IR). However, the molecular mechanisms underlying adipose tissue dysfunction in obesity are not fully understood. Herein, a proteomic analysis of subcutaneous (SC) and omental (OM) fat from lean subjects and obese individuals with different degrees of insulin sensitivity was performed to identify adipose tissue biomarkers related to obesity‐associated metabolic disease. Our results suggest that dysregulation of both adipose tissue extracellular matrix (ECM) organization and intracellular trafficking processes may be associated with IR in obesity. Thus, abnormal accumulation of the small leucine‐rich proteoglycan, lumican, as observed in SC fat of IR obese individuals, modifies collagen I organization, impairs adipogenesis and activates stress processes [endoplasmic reticulum and oxidative stress] in adipocytes. In OM fat, IR is associated with increased levels of the negative regulator of the Rab family of small GTPases, GDI2, which alters lipid storage in adipocytes by inhibiting insulin‐stimulated binding of the Rab protein, Rab18, to lipid droplets. Together, these results indicate that lumican and GDI2 might play depot‐dependent, pathogenic roles in obesity‐associated IR. Our findings provide novel insights into the differential maladaptive responses of SC and OM adipose tissue linking obesity to IR.
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Affiliation(s)
- Rocío Guzmán-Ruiz
- Department of Cell Biology, Physiology, and Immunology, Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), University of Córdoba, Reina Sofia University Hospital, Córdoba, Spain.,CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Instituto de Salud Carlos III, Madrid, Spain
| | - Carmen Tercero-Alcázar
- Department of Cell Biology, Physiology, and Immunology, Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), University of Córdoba, Reina Sofia University Hospital, Córdoba, Spain.,CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Instituto de Salud Carlos III, Madrid, Spain
| | - Yoana Rabanal-Ruiz
- Department of Cell Biology, Physiology, and Immunology, Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), University of Córdoba, Reina Sofia University Hospital, Córdoba, Spain.,CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Instituto de Salud Carlos III, Madrid, Spain
| | - Alberto Díaz-Ruiz
- Department of Cell Biology, Physiology, and Immunology, Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), University of Córdoba, Reina Sofia University Hospital, Córdoba, Spain.,CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Instituto de Salud Carlos III, Madrid, Spain
| | - Rajaa El Bekay
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Instituto de Salud Carlos III, Madrid, Spain.,Unidad de Gestión Clínica de Endocrinología y Nutrición, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Regional Universitario, University of Málaga, Málaga, Spain
| | - Oriol A Rangel-Zuñiga
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Instituto de Salud Carlos III, Madrid, Spain.,Lipids and Atherosclerosis Unit, IMIBIC, Reina Sofia University Hospital, University of Córdoba, Córdoba, Spain
| | - M Carmen Navarro-Ruiz
- Department of Cell Biology, Physiology, and Immunology, Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), University of Córdoba, Reina Sofia University Hospital, Córdoba, Spain.,CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Instituto de Salud Carlos III, Madrid, Spain
| | - Laura Molero
- Department of Cell Biology, Physiology, and Immunology, Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), University of Córdoba, Reina Sofia University Hospital, Córdoba, Spain.,CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Instituto de Salud Carlos III, Madrid, Spain
| | - Antonio Membrives
- Unidad de Gestión Clínica de Cirugía General y Digestivo, Sección de Obesidad, IMIBIC, Reina Sofia University Hospital, Córdoba, Spain
| | - Juan F Ruiz-Rabelo
- Unidad de Gestión Clínica de Cirugía General y Digestivo, Sección de Obesidad, IMIBIC, Reina Sofia University Hospital, Córdoba, Spain
| | - Abhay Pandit
- Centre for Research in Medical Devices (CÚRAM), National University of Ireland, Galway, Ireland
| | - José López-Miranda
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Instituto de Salud Carlos III, Madrid, Spain.,Lipids and Atherosclerosis Unit, IMIBIC, Reina Sofia University Hospital, University of Córdoba, Córdoba, Spain
| | - Francisco J Tinahones
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Instituto de Salud Carlos III, Madrid, Spain.,Department of Endocrinology and Nutrition, Virgen de la Victoria Hospital (IBIMA), University of Málaga, Málaga, Spain
| | - María M Malagón
- Department of Cell Biology, Physiology, and Immunology, Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), University of Córdoba, Reina Sofia University Hospital, Córdoba, Spain.,CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Instituto de Salud Carlos III, Madrid, Spain
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Hepatocyte Injury and Hepatic Stem Cell Niche in the Progression of Non-Alcoholic Steatohepatitis. Cells 2020; 9:cells9030590. [PMID: 32131439 PMCID: PMC7140508 DOI: 10.3390/cells9030590] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 02/21/2020] [Accepted: 02/27/2020] [Indexed: 02/07/2023] Open
Abstract
Non-alcoholic fatty liver disease (NAFLD) is a chronic liver disease characterized by lipid accumulation in hepatocytes in the absence of excessive alcohol consumption. The global prevalence of NAFLD is constantly increasing. NAFLD is a disease spectrum comprising distinct stages with different prognoses. Non-alcoholic steatohepatitis (NASH) is a progressive condition, characterized by liver inflammation and hepatocyte ballooning, with or without fibrosis. The natural history of NAFLD is negatively influenced by NASH onset and by the progression towards advanced fibrosis. Pathogenetic mechanisms and cellular interactions leading to NASH and fibrosis involve hepatocytes, liver macrophages, myofibroblast cell subpopulations, and the resident progenitor cell niche. These cells are implied in the regenerative trajectories following liver injury, and impairment or perturbation of these mechanisms could lead to NASH and fibrosis. Recent evidence underlines the contribution of extra-hepatic organs/tissues (e.g., gut, adipose tissue) in influencing NASH development by interacting with hepatic cells through various molecular pathways. The present review aims to summarize the role of hepatic parenchymal and non-parenchymal cells, their mutual influence, and the possible interactions with extra-hepatic tissues and organs in the pathogenesis of NAFLD.
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A Microbial Signature Identifies Advanced Fibrosis in Patients with Chronic Liver Disease Mainly Due to NAFLD. Sci Rep 2020; 10:2771. [PMID: 32066758 PMCID: PMC7026172 DOI: 10.1038/s41598-020-59535-w] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 01/29/2020] [Indexed: 01/30/2023] Open
Abstract
The presence of advanced fibrosis is an important measure of the severity of chronic liver disease. Prior works that have examined the gut microbiome as a novel biomarker for advanced fibrosis have only examined patients with nonalcoholic fatty liver disease. Therefore, our goal was to examine the gut microbiome across varying etiologies of liver disease to create a predictive model for liver fibrosis based upon a microbial signature. Stool samples were obtained from patients with chronic liver disease (n = 50) undergoing FibroScan (ultrasound elastography) at the VA Greater Los Angeles Healthcare System. Healthy control patients (n = 25) were also recruited as a reference population. Fecal samples underwent 16S ribosomal RNA sequencing. Using differentially abundant microbes, a random forest classifier model was created to distinguish advanced fibrosis from mild/moderate fibrosis. The findings were then validated in a separate cohort of chronic liver disease patients (n = 37). Etiologies for liver disease included non-alcoholic liver disease (58.0%), hepatitis C (26.0%), hepatitis B (10.0%), and alcohol (6.0%). Microbiome composition was distinct in liver patients with advanced fibrosis compared to those with minimal fibrosis and healthy controls (p = 0.003). In multivariate negative binomial modeling, 26 bacterial taxa were differentially abundant in patients with advanced fibrosis as compared to those with minimal/moderate fibrosis (q-value < 0.05). A random forests classifier based on these taxa had an AUROC of 0.90 to predict advanced fibrosis. Prevotella copri, which was enriched in patients with advanced fibrosis, was the most strongly predictive microbe in the classifier. The classifier had an AUROC of 0.82 for advanced fibrosis in the validation cohort and Prevotella copri remained the strongest predictive microbe for advanced fibrosis. There is a distinct microbial signature for patients with advanced fibrosis independent of liver disease etiology and other comorbidities. These results suggest that microbial profiles can be used as a non-invasive marker for advanced fibrosis and support the hypothesis that microbes and their metabolites contribute to hepatic fibrosis.
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Nithyananthan S, Sushmaa D, Myrthong I, Valluru L, Guha S, Hassan Mir I, Behera J, Thirunavukkarasu C. Curcuma longa and Trigonella foenum graecum-enriched nutrient mixture from germinated Macrotyloma uniflorum and Vigna radiate ameliorate nonalcoholic fatty liver diseases in rats. J Food Biochem 2020; 44:e13159. [PMID: 32017151 DOI: 10.1111/jfbc.13159] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 01/08/2020] [Accepted: 01/13/2020] [Indexed: 12/19/2022]
Abstract
The prevalence of nonalcoholic fatty liver is increasing due to modern lifestyle. Germinated and dehulled Macrotyloma uniflorum and Vigna radiate were shown to have enhanced nutrients. Curcuma longa and Trigonella foenum graecum were proven hepatoprotective.The supplementation of the nutrient herbal mixture to the MCD diet-induced steatosis shows reduced hepatic fat accumulation and lipid profile, and liver injury markers in serum also reserved in normal. Increased serum albumin in the treatment group indicates that the liver function is enhanced than that of steatosis. The supplementation of the herbal mixture has preserved the hepatic antioxidant. Zymographic analysis of matrix metalloproteinase, western blot determination of α-SMA, and histological evolution (H&E, Sirius red) depicted reduced fibrosis and reveled management of hepatic stellate cells in quiescent form. The present study concludes that the herbal mixture has reduced hepatocyte fat accumulation in steatotic animals, and curtailed the oxidative stress, further it prevents the progression of steatohepatitis. PRACTICAL APPLICATIONS: Fatty liver diseases can be treated by modulating the diet composition such as consuming food rich in the nutrient herbal mixture. In this study, the nutrient mixture was made with dynamic food processing techniques such as germination, dehulling, and milling to augment the nutritional contents. Besides, Macrotyloma uniflorum, Vigna radiate, Curcuma longa, and Trigonella foenum graecum were used to improve the medicinal value and antioxidant. This formulation could target the various stages of NAFLD. This study revealed that the nutrient herbal mixture reduces the steatosis of the liver and curtailed the progression of steatohepatitis from hepatic steatosis. Since the edible foodstuff was used to make the nutrient mixture, it has excellent clinical application.
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Affiliation(s)
| | - Dangudubiyyam Sushmaa
- Department of Biochemistry and Molecular Biology, Pondicherry University, Puducherry, India
| | - Ibansiewdor Myrthong
- Department of Biochemistry and Molecular Biology, Pondicherry University, Puducherry, India
| | | | - Shreyoshi Guha
- Department of Biochemistry and Molecular Biology, Pondicherry University, Puducherry, India
| | - Ishfaq Hassan Mir
- Department of Biochemistry and Molecular Biology, Pondicherry University, Puducherry, India
| | - Jajnasenee Behera
- Department of Biochemistry and Molecular Biology, Pondicherry University, Puducherry, India
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Zhou Y, Zhang Q, Kong Y, Guo X, Zhang H, Fan H, Liu L. Insulin-Like Growth Factor Binding Protein-Related Protein 1 Activates Primary Hepatic Stellate Cells via Autophagy Regulated by the PI3K/Akt/mTOR Signaling Pathway. Dig Dis Sci 2020; 65:509-523. [PMID: 31468266 PMCID: PMC6995450 DOI: 10.1007/s10620-019-05798-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Accepted: 08/12/2019] [Indexed: 12/17/2022]
Abstract
BACKGROUND Autophagy is a self-degrading process. Previously, we showed that insulin-like growth factor binding protein-related protein 1 (IGFBPrP1) is a novel transforming growth factor β1 (TGFβ1)-interacting factor in liver fibrosis; the role of TGFβ1-mediated autophagy in hepatic stellate cells (HSCs) activation has been investigated. However, whether autophagy is regulated by IGFBPrP1 remains unknown. AIMS We investigated the interactions among IGFBPrP1, autophagy, and activation of primary rat HSCs. METHODS Primary HSCs were separated from Sprague Dawley rats by two-step enzymatic digestion, and then, we overexpressed or inhibited IGFBPrP1 expression in HSCs under serum-starved condition. Autophagy inducer rapamycin or inhibitor 3-methyladenine (3MA) was used to assess the relationship between autophagy and HSCs activation. RESULTS We observed the expression of activation marker α-SMA and autophagy markers such as LC3B and Beclin1, which were significantly increased in HSCs treated with adenovirus vector harboring the IGFBPrP1 gene (AdIGFBPrP1) compared to cells cultured under serum-starved. In comparison, HSCs treated with shIGFBPrP1 showed opposite results. Furthermore, HSCs activation and autophagy increased when cells were treated with rapamycin, whereas opposite results were obtained when cells were treated with 3MA. AdIGFBPrP1 treatment downregulated the phosphorylation of Akt and mTOR. CONCLUSION Autophagy was induced in IGFBPrP1-treated primary HSCs, and IGFBPrP1-induced autophagy promoted the activation of HSCs and extracellular matrix expression, the underlying mechanism of which may involve the phosphatidylinositide 3-kinase/Akt/mTOR signaling pathway.
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Affiliation(s)
- Yuzheng Zhou
- Department of Gastroenterology and Hepatology, The First Hospital of Shanxi Medical University, Taiyuan, China
| | - Qianqian Zhang
- Department of Gastroenterology and Hepatology, The First Hospital of Shanxi Medical University, Taiyuan, China
- Experimental Center of Science and Research, The First Hospital of Shanxi Medical University, Taiyuan, Shanxi Province, China
- Key Laboratory of Cell Physiology, Department of The Ministry of Education, Shanxi Medical University, 85 Jiefang South Road, Taiyuan, 030001, Shanxi Province, China
| | - Yangyang Kong
- Department of Gastroenterology and Hepatology, The First Hospital of Shanxi Medical University, Taiyuan, China
| | - Xiaohong Guo
- Department of Gastroenterology and Hepatology, The First Hospital of Shanxi Medical University, Taiyuan, China
- Experimental Center of Science and Research, The First Hospital of Shanxi Medical University, Taiyuan, Shanxi Province, China
- Key Laboratory of Cell Physiology, Department of The Ministry of Education, Shanxi Medical University, 85 Jiefang South Road, Taiyuan, 030001, Shanxi Province, China
| | - Haiyan Zhang
- Department of Gastroenterology and Hepatology, The First Hospital of Shanxi Medical University, Taiyuan, China
- Experimental Center of Science and Research, The First Hospital of Shanxi Medical University, Taiyuan, Shanxi Province, China
- Key Laboratory of Cell Physiology, Department of The Ministry of Education, Shanxi Medical University, 85 Jiefang South Road, Taiyuan, 030001, Shanxi Province, China
| | - Huiqin Fan
- Department of Gastroenterology and Hepatology, The First Hospital of Shanxi Medical University, Taiyuan, China
- Experimental Center of Science and Research, The First Hospital of Shanxi Medical University, Taiyuan, Shanxi Province, China
- Key Laboratory of Cell Physiology, Department of The Ministry of Education, Shanxi Medical University, 85 Jiefang South Road, Taiyuan, 030001, Shanxi Province, China
| | - Lixin Liu
- Department of Gastroenterology and Hepatology, The First Hospital of Shanxi Medical University, Taiyuan, China.
- Experimental Center of Science and Research, The First Hospital of Shanxi Medical University, Taiyuan, Shanxi Province, China.
- Key Laboratory of Cell Physiology, Department of The Ministry of Education, Shanxi Medical University, 85 Jiefang South Road, Taiyuan, 030001, Shanxi Province, China.
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Schuster-Gaul S, Geisler LJ, McGeough MD, Johnson CD, Zagorska A, Li L, Wree A, Barry V, Mikaelian I, Jih LJ, Papouchado BG, Budas G, Hoffman HM, Feldstein AE. ASK1 inhibition reduces cell death and hepatic fibrosis in an Nlrp3 mutant liver injury model. JCI Insight 2020; 5:123294. [PMID: 31996485 PMCID: PMC7098717 DOI: 10.1172/jci.insight.123294] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 12/18/2019] [Indexed: 12/14/2022] Open
Abstract
Hepatic inflammasome activation is considered a major contributor to liver fibrosis in NASH. Apoptosis signal-regulating kinase 1 (ASK1) is an apical mitogen-activated protein kinase that activates hepatic JNK and p38 to promote apoptosis, inflammation, and fibrosis. The aim of the current study was to investigate whether pharmacologic inhibition of ASK1 could attenuate hepatic fibrosis driven by inflammasome activation using gain-of-function NOD-like receptor protein 3 (Nlrp3) mutant mice. Tamoxifen-inducible Nlrp3 knock-in (Nlrp3A350V/+CreT-KI) mice and WT mice were administered either control chow diet or diet containing the selective ASK1 inhibitor GS-444217 for 6 weeks. Livers of Nlrp3-KI mice had increased inflammation, cell death, and fibrosis and increased phosphorylation of ASK1, p38, and c-Jun. GS-444217 reduced ASK1 pathway activation, liver cell death, and liver fibrosis. ASK1 inhibition resulted in a significant downregulation of genes involved in collagen production and extracellular matrix deposition, as well as in a reduced hepatic TNF-α expression. ASK1 inhibition also directly reduced LPS-induced gene expression of Collagen 1A1 (Col1a1) in hepatic stellate cells isolated from Nlrp3-KI mice. In conclusion, ASK1 inhibition reduced liver cell death and fibrosis downstream of inflammatory signaling induced by NLRP3. These data provide mechanistic insight into the antifibrotic mechanisms of ASK1 inhibition.
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Affiliation(s)
- Susanne Schuster-Gaul
- Department of Pediatrics, School of Medicine, UCSD, La Jolla, California, USA
- Clinic and Polyclinic for Cardiology, Medical Faculty, Leipzig University, Leipzig, Germany
| | - Lukas Jonathan Geisler
- Department of Pediatrics, School of Medicine, UCSD, La Jolla, California, USA
- Department of Internal Medicine III, RWTH-Aachen University Hospital, Aachen, Germany
| | - Matthew D McGeough
- Department of Pediatrics, School of Medicine, UCSD, La Jolla, California, USA
| | - Casey D Johnson
- Department of Pediatrics, School of Medicine, UCSD, La Jolla, California, USA
| | | | - Li Li
- Gilead Sciences Inc., Foster City, California, USA
| | - Alexander Wree
- Department of Pediatrics, School of Medicine, UCSD, La Jolla, California, USA
- Department of Hepatology and Gastroenterology, Charité University Medical Center Berlin, Berlin, Germany
| | - Vivian Barry
- Gilead Sciences Inc., Foster City, California, USA
| | | | - Lily J Jih
- Department of Pathology, Veterans Affairs San Diego Healthcare System, San Diego, California, USA
| | - Bettina G Papouchado
- Department of Pathology, Veterans Affairs San Diego Healthcare System, San Diego, California, USA
| | - Grant Budas
- Gilead Sciences Inc., Foster City, California, USA
| | - Hal M Hoffman
- Department of Pediatrics, School of Medicine, UCSD, La Jolla, California, USA
| | - Ariel E Feldstein
- Department of Pediatrics, School of Medicine, UCSD, La Jolla, California, USA
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Riis-Vestergaard MJ, Laustsen C, Mariager CØ, Schulte RF, Pedersen SB, Richelsen B. Glucose metabolism in brown adipose tissue determined by deuterium metabolic imaging in rats. Int J Obes (Lond) 2020; 44:1417-1427. [PMID: 31965069 DOI: 10.1038/s41366-020-0533-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 12/13/2019] [Accepted: 01/07/2020] [Indexed: 01/02/2023]
Abstract
BACKGROUND/OBJECTIVES Brown adipose tissue (BAT) has gained growing interest as a potential target for treatment of obesity. Currently, the most widely used technique/method for in vivo measurements of BAT activity in humans is 18FDG PET/CT. To supplement these investigations novel radiation-free methods are warranted. Deuterium metabolic imaging (DMI) is a novel modality that combines magnetic resonance spectroscopic (MRS) imaging with deuterium-labelled glucose (2H-glucose). This allows for spatio-temporal and metabolic imaging beyond glucose uptake. We aimed to evaluate if DMI could discriminate glucose metabolism in BAT of cold-acclimatised and thermoneutral rats. SUBJECTS/METHODS Male Sprague-Dawley rats were housed in a cold environment (9 °C, n = 10) or at thermoneutrality (30 °C, n = 11) for 1 week. For imaging rats were anaesthetized, received a 2H-glucose (1 M, 1.95 g/kg) bolus and DMI was acquired at baseline followed by 20 min time intervals up to 2 h. Furthermore, Dixon MRI was performed for anatomical determination of the interscapular BAT (iBAT) depot along with dynamic contrast enhanced (DCE) MRI to evaluate perfusion. RESULTS 2H-glucose signal was higher in cold-acclimatised rats compared with thermoneutral rats (p ≤ 0.001) indicating an overall increase in glucose uptake and metabolism. This was in line with a lower fat/water threshold, higher perfusion and increased UCP1 mRNA expression in iBAT (ninefold increment) of cold-acclimatised rats compared with thermoneutral rats. CONCLUSIONS We find that DMI can discriminate cold-acclimatised and thermoneutral BAT in rats. This is the first study to evaluate BAT activity by DMI, which may open up for the use of the non-radioactive DMI method for BAT measurements in humans.
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Affiliation(s)
- Mette Ji Riis-Vestergaard
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Palle Juul Jensens Boulevard 99, 8200, Aarhus N, Denmark. .,Institute of Clinical Medicine, Aarhus University, Aarhus, Denmark.
| | - Christoffer Laustsen
- MR Research Center, Institute of Clinical Medicine, Aarhus University, Aarhus, Denmark
| | | | | | - Steen Bønløkke Pedersen
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Palle Juul Jensens Boulevard 99, 8200, Aarhus N, Denmark.,Institute of Clinical Medicine, Aarhus University, Aarhus, Denmark.,Steno Diabetes Center Aarhus, Aarhus, Denmark
| | - Bjørn Richelsen
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Palle Juul Jensens Boulevard 99, 8200, Aarhus N, Denmark.,Institute of Clinical Medicine, Aarhus University, Aarhus, Denmark.,Steno Diabetes Center Aarhus, Aarhus, Denmark
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Frey LJ, Talbert DA. Artificial Intelligence Pipeline to Bridge the Gap between Bench Researchers and Clinical Researchers in Precision Medicine. MED ONE 2020; 5:10.20900/mo20200001. [PMID: 33511289 PMCID: PMC7839064 DOI: 10.20900/mo20200001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Precision medicine informatics is a field of research that incorporates learning systems that generate new knowledge to improve individualized treatments using integrated data sets and models. Given the ever-increasing volumes of data that are relevant to patient care, artificial intelligence (AI) pipelines need to be a central component of such research to speed discovery. Applying AI methodology to complex multidisciplinary information retrieval can support efforts to discover bridging concepts within collaborating communities. This dovetails with precision medicine research, given the information rich multi-omic data that are used in precision medicine analysis pipelines. In this perspective article we define a prototype AI pipeline to facilitate discovering research connections between bioinformatics and clinical researchers. We propose building knowledge representations that are iteratively improved through AI and human-informed learning feedback loops supported through crowdsourcing. To illustrate this, we will explore the specific use case of nonalcoholic fatty liver disease, a growing health care problem. We will examine AI pipeline construction and utilization in relation to bench-to-bedside bridging concepts with interconnecting knowledge representations applicable to bioinformatics researchers and clinicians.
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Affiliation(s)
- Lewis J. Frey
- Department of Public Health Science, Biomedical Informatics Center, Hollings Cancer Center, Medical University of South Carolina (MUSC), 135 Cannon St, Charleston, SC 29425, USA
- Health Equity and Rural Outreach Innovation Center (HEROIC), Ralph H. Johnson Veteran Affairs Medical Center, Charleston, SC 29401, USA
| | - Douglas A. Talbert
- Department of Computer Science, Tennessee Tech University (TTU), 1 William L Jones Dr, Cookeville, TN 38505, USA
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Singh SP, Barik RK. NonInvasive Biomarkers in Nonalcoholic Fatty Liver Disease: Are We There Yet? J Clin Exp Hepatol 2020; 10:88-98. [PMID: 32025168 PMCID: PMC6995889 DOI: 10.1016/j.jceh.2019.09.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2019] [Accepted: 09/15/2019] [Indexed: 12/12/2022] Open
Abstract
Nonalcoholic fatty liver disease (NAFLD) is the most common chronic liver disease worldwide. NAFLD encompasses a spectrum of disease ranging from simple steatosis (NAFL) to nonalcoholic steatohepatitis (NASH), cirrhosis and hepatocellular carcinoma. However, despite the growing recognition of this important disease burden, there are significant challenges to accurately and noninvasively diagnose the various forms of NAFLD, especially to differentiate benign steatosis from the progressive NASH. This is of utmost importance because although liver biopsy is considered the current imperfect 'gold' standard for diagnosing NASH and staging fibrosis, it is an invasive procedure with significant limitations. Although, a number of noninvasive markers have been or are currently undergoing investigation, until date, no highly sensitive and specific tests are available to differentiate NASH from simple steatosis. At the moment, further investigations are needed before prediction models or blood-based biomarkers become available and acceptable for routine clinical care. There is a great need for developing inexpensive, easily accessible, highly sensitive and specific biomarkers that permit not only the identification of patients at high risk of adverse outcomes, but also the monitoring of disease progression and response after therapeutic interventions.
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Affiliation(s)
- Shivaram P. Singh
- Address for correspondence: Shivaram Prasad Singh, Professor, Dept. of Gastroenterology, S.C.B. Medical College, Cuttack, Odisha, 753007, India.
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Du K, Chitneni SK, Suzuki A, Wang Y, Henao R, Hyun J, Premont RT, Naggie S, Moylan CA, Bashir MR, Abdelmalek MF, Diehl AM. Increased Glutaminolysis Marks Active Scarring in Nonalcoholic Steatohepatitis Progression. Cell Mol Gastroenterol Hepatol 2019; 10:1-21. [PMID: 31881361 PMCID: PMC7215180 DOI: 10.1016/j.jcmgh.2019.12.006] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 12/16/2019] [Accepted: 12/17/2019] [Indexed: 12/12/2022]
Abstract
BACKGROUND & AIMS Nonalcoholic steatohepatitis (NASH) occurs in the context of aberrant metabolism. Glutaminolysis is required for metabolic reprograming of hepatic stellate cells (HSCs) and liver fibrogenesis in mice. However, it is unclear how changes in HSC glutamine metabolism contribute to net changes in hepatic glutaminolytic activity during fibrosis progression, or whether this could be used to track fibrogenic activity in NASH. We postulated that increased HSC glutaminolysis marks active scarring in NASH. METHODS Glutaminolysis was assessed in mouse NASH fibrosis models and in NASH patients. Serum and liver levels of glutamine and glutamate and hepatic expression of glutamine transporter/metabolic enzymes were correlated with each other and with fibrosis severity. Glutaminolysis was disrupted in HSCs to examine if this directly influenced fibrogenesis. 18F-fluoroglutamine positron emission tomography was used to determine how liver glutamine assimilation tracked with hepatic fibrogenic activity in situ. RESULTS The serum glutamate/glutamine ratio increased and correlated with its hepatic ratio, myofibroblast content, and fibrosis severity. Healthy livers almost exclusively expressed liver-type glutaminase (Gls2); Gls2 protein localized in zone 1 hepatocytes, whereas glutamine synthase was restricted to zone 3 hepatocytes. In fibrotic livers, Gls2 levels reduced and glutamine synthase zonality was lost, but both Slc1a5 (glutamine transporter) and kidney-type Gls1 were up-regulated; Gls1 protein was restricted to stromal cells and accumulated in fibrotic septa. Hepatocytes did not compensate for decreased Gls2 by inducing Gls1. Limiting glutamine or directly inhibiting GLS1 inhibited growth and fibrogenic activity in cultured human HSCs. Compared with healthy livers, fibrotic livers were 18F-fluoroglutamine-avid by positron emission tomography, suggesting that glutamine-addicted myofibroblasts drive increased hepatic utilization of glutamine as fibrosis progresses. CONCLUSIONS Glutaminolysis is a potential diagnostic marker and therapeutic target during NASH fibrosis progression.
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Affiliation(s)
- Kuo Du
- Division of Gastroenterology, Duke University, Durham, North Carolina
| | | | - Ayako Suzuki
- Division of Gastroenterology, Duke University, Durham, North Carolina
| | - Ying Wang
- Division of Gastroenterology, Duke University, Durham, North Carolina
| | - Ricardo Henao
- Department of Electrical and Computer Engineering, Duke University, Durham, North Carolina
| | - Jeongeun Hyun
- Division of Gastroenterology, Duke University, Durham, North Carolina
| | - Richard T Premont
- Division of Gastroenterology, Duke University, Durham, North Carolina
| | - Susanna Naggie
- Division of Infectious Diseases, Department of Medicine, Duke University, Durham, North Carolina
| | - Cynthia A Moylan
- Division of Gastroenterology, Duke University, Durham, North Carolina
| | - Mustafa R Bashir
- Division of Gastroenterology, Duke University, Durham, North Carolina; Department of Radiology, Duke University, Durham, North Carolina; Center for Advanced Magnetic Resonance Development, Duke University, Durham, North Carolina
| | | | - Anna Mae Diehl
- Division of Gastroenterology, Duke University, Durham, North Carolina.
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Wu Y, Li Z, Xiu AY, Meng DX, Wang SN, Zhang CQ. Carvedilol attenuates carbon tetrachloride-induced liver fibrosis and hepatic sinusoidal capillarization in mice. DRUG DESIGN DEVELOPMENT AND THERAPY 2019; 13:2667-2676. [PMID: 31534314 PMCID: PMC6681906 DOI: 10.2147/dddt.s210797] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 06/30/2019] [Indexed: 12/24/2022]
Abstract
Aim To investigate the effect of carvedilol on liver fibrosis and hepatic sinusoidal capillarization in mice with carbon tetrachloride (CCl4)-induced fibrosis. Methods A liver fibrosis mouse model was induced by intraperitoneal CCl4 injection for 8 weeks. The mice were divided into five experimental groups: the normal group, the oil group, the CCl4 group, the CCl4+carvedilol (5 mg/kg/d) group, and the CCl4+carvedilol (10 mg/kg/d) group. The extent of liver fibrosis was evaluated by histopathological staining, and the changes in fenestrations of hepatic sinus endothelial cells were observed by scanning electron microscope (SEM). The expression of α-smooth muscle actin (α-SMA) and vascular endothelial markers was detected by immunohistochemistry and Western blot assays. The effect of carvedilol on cell apoptosis was studied via Terminal deoxynucleotidyl Transferase Mediated dUTP Nick End Labeling (TUNEL) assay, and the serum levels of matrix metalloproteinase-8 (MMP-8), vascular endothelial growth factor (VEGF), and angiopoietin-2 were detected through a Luminex assay. Results Liver fibrosis in CCl4-treated mice was attenuated by reduced accumulation of collagen and the reaction of inflammation with carvedilol treatment. Carvedilol reduced the activation of hepatic stellate cells (HSCs) and increased the number of apoptotic cells. The expression of α-SMA, CD31, CD34 and VWF (von Willebrand factor) was significantly decreased after carvedilol treatment. In addition, the number of fenestrae in the hepatic sinusoid showed notable differences between the groups, and the serum levels of MMP-8, VEGF and angiopoietin-2 were increased in the mice with liver fibrosis and reduced by carvedilol treatment. Conclusion The study demonstrated that carvedilol could prevent further development of liver fibrosis and hepatic sinusoidal capillarization in mice with CCl4-induced fibrosis.
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Affiliation(s)
- Ying Wu
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong Province, People's Republic of China
| | - Zhen Li
- Department of Health Digestion, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong Province, People's Republic of China
| | - Ai-Yuan Xiu
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong Province, People's Republic of China
| | - Dong-Xiao Meng
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong Province, People's Republic of China
| | - Si-Ning Wang
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong Province, People's Republic of China
| | - Chun-Qing Zhang
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong Province, People's Republic of China
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Angel TE, Naylor BC, Price JC, Evans C, Szapacs M. Improved Sensitivity for Protein Turnover Quantification by Monitoring Immonium Ion Isotopologue Abundance. Anal Chem 2019; 91:9732-9740. [PMID: 31259532 DOI: 10.1021/acs.analchem.9b01329] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We describe an analytical strategy allowing for the direct quantification of stable isotope label incorporation in newly synthesized proteins following administration of the stable isotope tracer deuterium oxide. We present a demonstration of coupling high-resolution mass spectrometry, metabolic stable isotope labeling, and MS/MS-based isotopologue quantification for the measurement of protein turnover. Stable isotope labeling with deuterium oxide, followed by immonium ion isotopologue quantification, is a more sensitive strategy for determining protein fractional synthesis rates compared to peptide centric mass isotopomer distribution analysis approaches when labeling time and/or stable isotope tracer exposure is limited and, as such, offers a great advantage for human studies.
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Affiliation(s)
- Thomas E Angel
- In-vitro/In-vivo Translation Platform Group , GlaxoSmithKline , 1250 S Collegeville Road , Collegeville , Pennsylvania 19426 , United States
| | - Bradley C Naylor
- Department of Chemistry and Biochemistry , Brigham Young University , Provo , Utah 84604 , United States
| | - John C Price
- Department of Chemistry and Biochemistry , Brigham Young University , Provo , Utah 84604 , United States
| | - Christopher Evans
- In-vitro/In-vivo Translation Platform Group , GlaxoSmithKline , 1250 S Collegeville Road , Collegeville , Pennsylvania 19426 , United States
| | - Matthew Szapacs
- In-vitro/In-vivo Translation Platform Group , GlaxoSmithKline , 1250 S Collegeville Road , Collegeville , Pennsylvania 19426 , United States
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