51
|
The predictive value of the hepatorenal index for detection of impaired glucose metabolism in patients with non-alcoholic fatty liver disease. Indian J Gastroenterol 2020; 39:50-59. [PMID: 32185691 DOI: 10.1007/s12664-019-01009-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Accepted: 11/06/2019] [Indexed: 02/04/2023]
Abstract
BACKGROUND/PURPOSE Non-alcoholic fatty liver disease (NAFLD) patients are at increased risk of liver-related as well as cardiovascular mortality, including diabetes, coronary heart disease, and stroke, independently of traditional cardiovascular risk factors and metabolic syndrome. The aim of this study was to find out the predictive impact of hepatorenal index (HRI) in the detection of impaired glucose metabolism in asymptomatic NAFLD patients. METHODS B-mode ultrasound examinations were performed and ultrasound images from all 89 NAFLD patients aged 50.8 ± 10.1 years were analyzed by echogenicity analyzing software and HRI was acquired, and appropriate laboratory tests for liver, glucose, and lipid metabolism were undertaken. RESULTS The mean HRI was 1.345 ± 0.189. 23.59% of patients had mild NAFLD (HRI = 1.167 ± 0.041), 64.04% moderate (HRI = 1.401 ± 0.102), and 12.36% patients severe NAFLD (HRI = 1.802 ± 0.098). Impaired glucose metabolism was present in 48.31% of patients. A positive correlation was present between HRI and impaired glucose metabolism (r = 0.335, p = 0.001). The coefficients of determinations R2 for linear regression for HRI and glycated hemoglobin (HbA1c) and oral glucose tolerance test (GTT) were 0.05841 and 0.07498, respectively. The cutoff values for HRI in the detection of diabetes and prediabetes, and prediabetes only, were 1.4 and 1.38, respectively. In logistic regression, the β coefficients for oral GTT, HbA1c, or HRI were 0.62042 (p = 0.0002), 2.18036 (p = 0.0033), and 2.36986 (p = 0.012). The hazard ratio (HR) coefficients (exp [b]) for HRI, HbA1c, and oral GTT sorted according to their HR strength were 10.6958, 8.8494, and 1.8597, respectively. CONCLUSION Ultrasonographically acquired HRI has a significant predictive impact on the detection of prediabetes and diabetes in patients with NAFLD.
Collapse
|
52
|
Lu Z, Li Y, Syn WK, Wang Z, Lopes-Virella MF, Lyons TJ, Huang Y. Amitriptyline inhibits nonalcoholic steatohepatitis and atherosclerosis induced by high-fat diet and LPS through modulation of sphingolipid metabolism. Am J Physiol Endocrinol Metab 2020; 318:E131-E144. [PMID: 31821039 PMCID: PMC7052581 DOI: 10.1152/ajpendo.00181.2019] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We reported previously that increased acid sphingomyelinase (ASMase)-catalyzed hydrolysis of sphingomyelin, which leads to increases in ceramide and sphingosine 1 phosphate (S1P), played a key role in the synergistic upregulation of proinflammatory cytokines by palmitic acid (PA), a major saturated fatty acid, and lipopolysaccharide (LPS) in macrophages. Since macrophages are vital players in nonalcoholic steatohepatitis (NASH) and atherosclerosis, we assessed the effect of ASMase inhibition on NASH and atherosclerosis cooperatively induced by high-PA-containing high-fat diet (HP-HFD) and LPS in LDL receptor-deficient (LDLR-/-) mice. LDLR-/- mice were fed HP-HFD, injected with low dose of LPS and treated with or without the ASMase inhibitor amitriptyline. The neutral sphingomyelinase inhibitor GW4869 was used as control. Metabolic study showed that both amitriptyline and GW4869 reduced glucose, lipids, and insulin resistance. Histological analysis and Oil Red O staining showed that amitriptyline robustly reduced hepatic steatosis while GW4869 had modest effects. Interestingly, immunohistochemical study showed that amitriptyline, but not GW4869, strongly reduced hepatic inflammation. Furthermore, results showed that both amitriptyline and GW4869 attenuated atherosclerosis. To elucidate the underlying mechanisms whereby amitriptyline inhibited both NASH and atherosclerosis, but GW4869 only inhibited atherosclerosis, we found that amitriptyline, but not GW4869, downregulated proinflammatory cytokines in macrophages. Finally, we found that inhibition of sphingosine 1 phosphate production is a potential mechanism whereby amitriptyline inhibited proinflammatory cytokines. Collectively, this study showed that amitriptyline inhibited NASH and atherosclerosis through modulation of sphingolipid metabolism in LDLR-/- mice, indicating that sphingolipid metabolism in macrophages plays a crucial role in the linkage of NASH and atherosclerosis.
Collapse
Affiliation(s)
- Zhongyang Lu
- Ralph H. Johnson Veterans Affairs Medical Center, Charleston, South Carolina
| | - Yanchun Li
- Division of Endocrinology, Diabetes and Medical Genetics, Department of Medicine, Medical University of South Carolina, Charleston, South Carolina
| | - Wing-Kin Syn
- Ralph H. Johnson Veterans Affairs Medical Center, Charleston, South Carolina
- Division of Gastroenterology and Hepatology, Department of Medicine, Medical University of South Carolina, Charleston, South Carolina
- Department of Physiology, Faculty of Medicine and Nursing, University of the Basque Country, Euskal Herriko Unibertsitatea/Universidad del País Vasco, Leioa, Spain
| | - Zhewu Wang
- Ralph H. Johnson Veterans Affairs Medical Center, Charleston, South Carolina
- Department of Psychiatry and Behavioral Sciences, Medical University of South Carolina, Charleston, South Carolina
| | - Maria F Lopes-Virella
- Ralph H. Johnson Veterans Affairs Medical Center, Charleston, South Carolina
- Division of Endocrinology, Diabetes and Medical Genetics, Department of Medicine, Medical University of South Carolina, Charleston, South Carolina
| | - Timothy J Lyons
- Division of Endocrinology, Diabetes and Medical Genetics, Department of Medicine, Medical University of South Carolina, Charleston, South Carolina
| | - Yan Huang
- Ralph H. Johnson Veterans Affairs Medical Center, Charleston, South Carolina
- Division of Endocrinology, Diabetes and Medical Genetics, Department of Medicine, Medical University of South Carolina, Charleston, South Carolina
| |
Collapse
|
53
|
Multi-omics analysis of multiple missions to space reveal a theme of lipid dysregulation in mouse liver. Sci Rep 2019; 9:19195. [PMID: 31844325 PMCID: PMC6915713 DOI: 10.1038/s41598-019-55869-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 11/30/2019] [Indexed: 12/13/2022] Open
Abstract
Spaceflight has several detrimental effects on the physiology of astronauts, many of which are recapitulated in rodent models. Mouse studies performed on the Space Shuttle showed disruption of lipid metabolism in liver. However, given that these animals were not sacrificed on-orbit and instead returned live to earth, it is unclear if these disruptions were solely induced by space stressors (e.g. microgravity, space radiation) or in part explained by the stress of return to Earth. In this work we analyzed three liver datasets from two different strains of mice (C57BL/6 (Jackson) & BALB/c (Taconic)) flown aboard the International Space Station (ISS). Notably, these animals were sacrificed on-orbit and exposed to varying spaceflight durations (i.e. 21, 37, and 42 days vs 13 days for the Shuttle mice). Oil Red O (ORO) staining showed abnormal lipid accumulation in all space-flown mice compared to ground controls regardless of strain or exposure duration. Similarly, transcriptomic analysis by RNA-sequencing revealed several pathways that were affected in both strains related to increased lipid metabolism, fatty acid metabolism, lipid and fatty acid processing, lipid catabolic processing, and lipid localization. In addition, key upstream regulators were predicted to be commonly regulated across all conditions including Glucagon (GCG) and Insulin (INS). Moreover, quantitative proteomic analysis showed that a number of lipid related proteins were changed in the livers during spaceflight. Taken together, these data indicate that activation of lipotoxic pathways are the result of space stressors alone and this activation occurs in various genetic backgrounds during spaceflight exposures of weeks to months. If similar responses occur in humans, a prolonged change of these pathways may result in the development of liver disease and should be investigated further.
Collapse
|
54
|
Donaldson J, Ngema M, Nkomozepi P, Erlwanger K. Quercetin administration post-weaning attenuates high-fructose, high-cholesterol diet-induced hepatic steatosis in growing, female, Sprague Dawley rat pups. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2019; 99:6954-6961. [PMID: 31414497 DOI: 10.1002/jsfa.9984] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 07/15/2019] [Accepted: 08/10/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND Fructose and cholesterol-rich diets have been implicated in the upsurge of metabolic syndrome (MetS). Phytochemicals are being explored as alternatives for the prevention and management of MetS. Thirty-six 21-day-old, female Sprague Dawley rats fed a high-fructose, high-cholesterol diet post-weaning were used to investigate the prophylactic potential of quercetin. Group 1 was given standard rat chow (SRC); Group 2: SRC and quercetin (75 mg kg-1 daily); Group 3: SRC and fenofibrate (100 mg kg-1 daily); Group 4 was given a high cholesterol diet (HCD) (2% added dietary cholesterol in SRC), 20% fructose drinking solution (FS); Group 5 was given HCD, 20% FS and quercetin (75 mg kg-1 daily); Group 6: HCD, 20% FS and fenofibrate (100 mg kg-1 daily). Rats were fed ad libitum for 8 weeks, euthanized, and blood and liver samples were collected. RESULTS The HCD and FS significantly increased (P < 0.05) absolute and relative liver masses and serum cholesterol. Fasting blood glucose, serum triglycerides, alanine transaminase, creatinine, and urea were not significantly different (P > 0.05) between groups. The HCD and FS significantly increased liver lipid yield compared to the SRC and rats receiving SRC with fenofibrate (P < 0.05). Quercetin or fenofibrate together with HCD and FS attenuated the diet-induced increase in liver lipids by approximately 50%, although this was not statistically significant. Liver macro- and micro-steatosis scores were significantly increased (P < 0.05) in rats receiving HCD and FS. Quercetin or fenofibrate administration together with HCD and FS significantly decreased (P < 0.05) liver macro-steatosis scores. CONCLUSION The prophylactic effect of quercetin on fructose and cholesterol diet-induced liver lipid accumulation may be exploited in the fight against non-alcoholic fatty liver disease (NAFLD). © 2019 Society of Chemical Industry.
Collapse
Affiliation(s)
- Janine Donaldson
- School of Physiology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Mandisa Ngema
- School of Physiology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Pilani Nkomozepi
- Department of Human Anatomy and Physiology, Faculty of Health Sciences, University of Johannesburg, Johannesburg, South Africa
| | - Kennedy Erlwanger
- School of Physiology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| |
Collapse
|
55
|
Acharya G, Kaushik RM, Gupta R, Kaushik R. Child-Turcotte-Pugh Score, MELD Score and MELD-Na Score as Predictors of Short-Term Mortality among Patients with End-Stage Liver Disease in Northern India. Inflamm Intest Dis 2019; 5:1-10. [PMID: 32232049 DOI: 10.1159/000503921] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 10/04/2019] [Indexed: 12/31/2022] Open
Abstract
Background and Objectives Child-Turcotte-Pugh (CTP), Model for End-Stage Liver Disease (MELD) and MELD-sodium (MELD-Na) scores are used for predicting disease severity and mortality among patients with end-stage liver disease. However, data regarding their usefulness in predicting the short-term outcome of end-stage liver disease are not available in India. This prospective study compared the CTP score, MELD score and MELD-Na score as predictors of short-term outcome among patients with end-stage liver disease. Methods CTP, MELD and MELD-Na scores were determined in 171 patients with end-stage liver disease at a tertiary healthcare centre in India at the time of admission, and the concordance (C-) statistics of the three scores for 3-month mortality were assessed and compared. The aetiology of end-stage liver disease and the clinical presentation were determined. Results The CTP score, MELD score and MELD-Na score on day 1 were significantly higher among non-survivors than among survivors (p < 0.0001 each). The C-statistic for 3-month mortality for the CTP score was 0.93 (p < 0.0001), that for the MELD score was 0.86 (p < 0.0001) and that for the MELD-Na score was 0.83 (p < 0.0001). The C-statistics of these scores differed significantly for 3-month mortality, and the CTP score was better than the MELD (p < 0.0001) and MELD-Na (p < 0.0001) scores in predicting 3-month mortality. Conclusions The CTP, MELD and MELD-Na scores were very good predictors of mortality at 3 months among patients with end-stage liver disease. The CTP score was superior to the MELD and MELD-Na scores in predicting 3-month mortality.
Collapse
Affiliation(s)
- Gagandeep Acharya
- Department of General Medicine, Himalayan Institute of Medical Sciences, Swami Rama Himalayan University, Dehradun, India
| | - Rajeev Mohan Kaushik
- Department of General Medicine, Himalayan Institute of Medical Sciences, Swami Rama Himalayan University, Dehradun, India
| | - Rohit Gupta
- Department of General Medicine, Himalayan Institute of Medical Sciences, Swami Rama Himalayan University, Dehradun, India
| | - Reshma Kaushik
- Department of General Medicine, Himalayan Institute of Medical Sciences, Swami Rama Himalayan University, Dehradun, India
| |
Collapse
|
56
|
d'Angelo M, Castelli V, Tupone MG, Catanesi M, Antonosante A, Dominguez-Benot R, Ippoliti R, Cimini AM, Benedetti E. Lifestyle and Food Habits Impact on Chronic Diseases: Roles of PPARs. Int J Mol Sci 2019; 20:ijms20215422. [PMID: 31683535 PMCID: PMC6862628 DOI: 10.3390/ijms20215422] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 10/28/2019] [Accepted: 10/29/2019] [Indexed: 02/07/2023] Open
Abstract
Peroxisome proliferator-activated receptors (PPARs) are nuclear receptors that exert important functions in mediating the pleiotropic effects of diverse exogenous factors such as physical exercise and food components. Particularly, PPARs act as transcription factors that control the expression of genes implicated in lipid and glucose metabolism, and cellular proliferation and differentiation. In this review, we aim to summarize the recent advancements reported on the effects of lifestyle and food habits on PPAR transcriptional activity in chronic disease.
Collapse
Affiliation(s)
- Michele d'Angelo
- Department of Life, Health and Environmental Sciences, University of L'Aquila, 67100 L'Aquila, Italy.
| | - Vanessa Castelli
- Department of Life, Health and Environmental Sciences, University of L'Aquila, 67100 L'Aquila, Italy.
| | - Maria Grazia Tupone
- Department of Life, Health and Environmental Sciences, University of L'Aquila, 67100 L'Aquila, Italy.
| | - Mariano Catanesi
- Department of Life, Health and Environmental Sciences, University of L'Aquila, 67100 L'Aquila, Italy.
| | - Andrea Antonosante
- Department of Life, Health and Environmental Sciences, University of L'Aquila, 67100 L'Aquila, Italy.
| | - Reyes Dominguez-Benot
- Department of Life, Health and Environmental Sciences, University of L'Aquila, 67100 L'Aquila, Italy.
| | - Rodolfo Ippoliti
- Department of Life, Health and Environmental Sciences, University of L'Aquila, 67100 L'Aquila, Italy.
| | - Anna Maria Cimini
- Department of Life, Health and Environmental Sciences, University of L'Aquila, 67100 L'Aquila, Italy.
- Sbarro Institute for Cancer Research and Molecular Medicine and Center for Biotechnology, Temple University, Philadelphia, PA 19122, USA.
| | - Elisabetta Benedetti
- Department of Life, Health and Environmental Sciences, University of L'Aquila, 67100 L'Aquila, Italy.
| |
Collapse
|
57
|
Salaye L, Bychkova I, Sink S, Kovalic AJ, Bharadwaj MS, Lorenzo F, Jain S, Harrison AV, Davis AT, Turnbull K, Meegalla NT, Lee SH, Cooksey R, Donati GL, Kavanagh K, Bonkovsky HL, McClain DA. A Low Iron Diet Protects from Steatohepatitis in a Mouse Model. Nutrients 2019; 11:nu11092172. [PMID: 31510077 PMCID: PMC6769937 DOI: 10.3390/nu11092172] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2019] [Revised: 08/31/2019] [Accepted: 09/06/2019] [Indexed: 02/07/2023] Open
Abstract
High tissue iron levels are a risk factor for multiple chronic diseases including type 2 diabetes mellitus (T2DM) and non-alcoholic fatty liver disease (NAFLD). To investigate causal relationships and underlying mechanisms, we used an established NAFLD model-mice fed a high fat diet with supplemental fructose in the water ("fast food", FF). Iron did not affect excess hepatic triglyceride accumulation in the mice on FF, and FF did not affect iron accumulation compared to normal chow. Mice on low iron are protected from worsening of markers for non-alcoholic steatohepatitis (NASH), including serum transaminases and fibrotic gene transcript levels. These occurred prior to the onset of significant insulin resistance or changes in adipokines. Transcriptome sequencing revealed the major effects of iron to be on signaling by the transforming growth factor beta (TGF-β) pathway, a known mechanistic factor in NASH. High iron increased fibrotic gene expression in vitro, demonstrating that the effect of dietary iron on NASH is direct. Conclusion: A lower tissue iron level prevents accelerated progression of NAFLD to NASH, suggesting a possible therapeutic strategy in humans with the disease.
Collapse
Affiliation(s)
- Lipika Salaye
- Center on Diabetes, Obesity and Metabolism, Department of Internal Medicine, Wake Forest Baptist Medical Center, Winston-Salem, NC 27101, USA
| | - Ielizaveta Bychkova
- Department of Internal Medicine, University of Utah Medical Center, Salt Lake City, UT 84112, USA
| | - Sandy Sink
- Center on Diabetes, Obesity and Metabolism, Department of Internal Medicine, Wake Forest Baptist Medical Center, Winston-Salem, NC 27101, USA
| | - Alexander J Kovalic
- Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA
| | - Manish S Bharadwaj
- Sticht Center on Aging, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA
- Agilent Technologies, 121 Hartwell Ave, Lexington, MA 02421, USA
| | - Felipe Lorenzo
- Center on Diabetes, Obesity and Metabolism, Department of Internal Medicine, Wake Forest Baptist Medical Center, Winston-Salem, NC 27101, USA
| | - Shalini Jain
- Center on Diabetes, Obesity and Metabolism, Department of Internal Medicine, Wake Forest Baptist Medical Center, Winston-Salem, NC 27101, USA
| | - Alexandria V Harrison
- Center on Diabetes, Obesity and Metabolism, Department of Internal Medicine, Wake Forest Baptist Medical Center, Winston-Salem, NC 27101, USA
| | - Ashley T Davis
- Department of Comparative Medicine, Wake Forest University, Winston-Salem, NC 27157, USA
| | - Katherine Turnbull
- Center on Diabetes, Obesity and Metabolism, Department of Internal Medicine, Wake Forest Baptist Medical Center, Winston-Salem, NC 27101, USA
- Department of Comparative Medicine, Wake Forest University, Winston-Salem, NC 27157, USA
| | - Nuwan T Meegalla
- Center on Diabetes, Obesity and Metabolism, Department of Internal Medicine, Wake Forest Baptist Medical Center, Winston-Salem, NC 27101, USA
- Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA
| | - Soh-Hyun Lee
- Department of Internal Medicine, University of Utah Medical Center, Salt Lake City, UT 84112, USA
| | - Robert Cooksey
- Department of Internal Medicine, University of Utah Medical Center, Salt Lake City, UT 84112, USA
- VA Medical Center, Salt Lake City, UT 84148, USA
| | - George L Donati
- Department of Chemistry, Wake Forest University, Winston-Salem, NC 27109, USA
| | - Kylie Kavanagh
- Department of Comparative Medicine, Wake Forest University, Winston-Salem, NC 27157, USA
- Department of Biomedicine, University of Tasmania, Hobart, Tasmania 7000, Australia
| | - Herbert L Bonkovsky
- Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA
| | - Donald A McClain
- Center on Diabetes, Obesity and Metabolism, Department of Internal Medicine, Wake Forest Baptist Medical Center, Winston-Salem, NC 27101, USA.
- VA Medical Center, Salt Lake City, UT 84148, USA.
- VA Medical Center, Salisbury, NC 28144, USA.
| |
Collapse
|
58
|
Evaluation of diffusion kurtosis imaging in stratification of nonalcoholic fatty liver disease and early diagnosis of nonalcoholic steatohepatitis in a rabbit model. Magn Reson Imaging 2019; 63:267-273. [PMID: 31445117 DOI: 10.1016/j.mri.2019.08.032] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 08/19/2019] [Accepted: 08/21/2019] [Indexed: 02/07/2023]
Abstract
PURPOSE To examine the feasibility of MR diffusion kurtosis imaging (DKI) for characterizing nonalcoholic fatty liver disease (NAFLD) and diagnosing nonalcoholic steatohepatitis (NASH). METHODS Thirty-two rabbits on high fat diet with different severities of NAFLD were imaged at 3 T MR including diffusion weighted imaging (DWI) and DKI using b values of 0, 400, 800 s/mm2 with 15 diffusion directions at each b value. Apparent diffusion coefficient (ADC) was derived from the linear exponential DWI model. Mean diffusion (MD) and mean kurtosis (MK) were derived from the quadratic exponential model of DKI. Correlations between MR parameters and hepatic pathology determined by the NAFLD activity scoring system were analyzed by Spearman rank correlation analysis. Receiver operating characteristic analyses were applied to determine the cutoff values of MD, MK as well as ADC in distinguishing NASH from non-NASH. The diagnostic efficacies of MD and MK in detecting NASH were compared with that of ADC. RESULTS Values for ADC and MD significantly decreased as the severity of NAFLD increased (ρ = -0.529, -0.904, respectively; P < 0.05). MK values significantly increased as the severity of NAFLD increased (ρ = 0.761; P < 0.05). In addition, both MD and MK values were significantly different between borderline NASH and NASH groups (MD: 1.729 ± 0.144 vs. 1.458 ± 0.240[×10-3 mm2/s]; MK: 1.096 ± 0.079 vs. 1.237 ± 0.180; P < 0.05). Moreover, there was a significantly higher area under the curve (AUC) for both MD (0.955) and MK (0.905), as compared to ADC (0.736). CONCLUSION Diffusion kurtosis imaging was feasible for stratifying NAFLD, and more accurately discriminated NASH from non-NASH when compared with DWI.
Collapse
|
59
|
Homeostasis of Glucose and Lipid in Non-Alcoholic Fatty Liver Disease. Int J Mol Sci 2019; 20:ijms20020298. [PMID: 30642126 PMCID: PMC6359196 DOI: 10.3390/ijms20020298] [Citation(s) in RCA: 90] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 01/07/2019] [Accepted: 01/09/2019] [Indexed: 02/07/2023] Open
Abstract
Industrialized society-caused dysregular human behaviors and activities such as overworking, excessive dietary intake, and sleep deprivation lead to perturbations in the metabolism and the development of metabolic syndrome. Non-alcoholic fatty liver disease (NAFLD), the most common chronic liver disease worldwide, affects around 30% and 25% of people in Western and Asian countries, respectively, which leads to numerous medical costs annually. Insulin resistance is the major hallmark of NAFLD and is crucial in the pathogenesis and for the progression from NAFLD to non-alcoholic steatohepatitis (NASH). Excessive dietary intake of saturated fats and carbohydrate-enriched foods contributes to both insulin resistance and NAFLD. Once NAFLD is established, insulin resistance can promote the progression to the more severe state of liver endangerment like NASH. Here, we review current and potential studies for understanding the complexity between insulin-regulated glycolytic and lipogenic homeostasis and the underlying causes of NAFLD. We discuss how disruption of the insulin signal is associated with various metabolic disorders of glucoses and lipids that constitute both the metabolic syndrome and NAFLD.
Collapse
|
60
|
Huang S, Pang D, Li X, You L, Zhao Z, Cheung PCK, Zhang M, Liu D. A sulfated polysaccharide from Gracilaria Lemaneiformis regulates cholesterol and bile acid metabolism in high-fat diet mice. Food Funct 2019; 10:3224-3236. [DOI: 10.1039/c9fo00263d] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This study aimed to evaluate the regulation of lipid metabolism and mechanism of a sulfated polysaccharide from Gracilaria Lemaneiformis (GLP).
Collapse
Affiliation(s)
- Shiming Huang
- School of Food Science and Engineering
- South China University of Technology
- Guangzhou 510640
- China
| | - Daorui Pang
- Sericultural & Agri-Food Research Institute
- Guangdong Academy of Agricultural Sciences
- Guangzhou 510610
- China
| | - Xiong Li
- School of Food Science and Engineering
- South China University of Technology
- Guangzhou 510640
- China
- Overseas Expertise Introduction Center for Discipline Innovation of Food Nutrition and Human Health (111 Center)
| | - Lijun You
- School of Food Science and Engineering
- South China University of Technology
- Guangzhou 510640
- China
- Overseas Expertise Introduction Center for Discipline Innovation of Food Nutrition and Human Health (111 Center)
| | - Zhengang Zhao
- School of Food Science and Engineering
- South China University of Technology
- Guangzhou 510640
- China
- Overseas Expertise Introduction Center for Discipline Innovation of Food Nutrition and Human Health (111 Center)
| | - Peter Chi-Keung Cheung
- Food and Nutritional Sciences
- School of Life Sciences
- The Chinese University of Hong Kong
- Shatin
- Hong Kong SAR
| | - Mingwei Zhang
- Sericultural & Agri-Food Research Institute
- Guangdong Academy of Agricultural Sciences
- Guangzhou 510610
- China
| | - Dong Liu
- School of Applied Chemistry and Biotechnology
- Shenzhen Polytechnic
- Shenzhen 518055
- China
| |
Collapse
|
61
|
Baranova A, Maltseva D, Tonevitsky A. Adipose may actively delay progression of NAFLD by releasing tumor-suppressing, anti-fibrotic miR-122 into circulation. Obes Rev 2019; 20:108-118. [PMID: 30248223 DOI: 10.1111/obr.12765] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 08/07/2018] [Accepted: 08/09/2018] [Indexed: 12/12/2022]
Abstract
Nonalcoholic fatty liver disease (NAFLD) is the most common liver pathology. Here we propose tissue-cooperative, homeostatic model of NAFLD. During early stages of NAFLD the intrahepatic production of miR-122 falls, while the secretion of miRNA-containing exosomes by adipose increases. Bloodstream carries exosome to the liver, where their miRNA cargo is released to regulate their intrahepatic targets. When the deterioration of adipose catches up with the failing hepatic parenchyma, the external supply of liver-supporting miRNAs gradually tapers off, leading to the fibrotic decompensation of the liver and an increase in hepatic carcinogenesis. This model may explain paradoxical observations of the disease-associated decrease in intrahepatic production of certain miRNAs with an increase in their levels in serum. Infusions of miR-122 and, possibly, some other miRNAs may be efficient for preventing NAFLD-associated hepatocellular carcinoma. The best candidates for exosome-wrapped miRNA producer are adipose tissue-derived mesenchymal stem cells (MSCs), known for their capacity to shed large amounts of exosomes into the media. Notably, MSC-derived exosomes with no specific loading are already tested in patients with liver fibrosis. Carrier exosomes may be co-manufactured along with their cargo. Exosome-delivered miRNA cocktails may augment functioning of human organs suffering from a variety of chronic diseases.
Collapse
Affiliation(s)
- A Baranova
- School of Systems Biology, George Mason University, Fairfax, VA, USA.,Research Center for Medical Genetics, Moscow, Russia
| | - D Maltseva
- Department of Fundamental Medicine, School of Biomedicine, Far Eastern Federal University (FEFU), Vladivostok, Russia.,Scientific Research Center Bioclinicum (SRC Bioclinicum), Moscow, Russia
| | - A Tonevitsky
- Scientific Research Center Bioclinicum (SRC Bioclinicum), Moscow, Russia.,Higher School of Economics, Moscow, Russia
| |
Collapse
|
62
|
Role of the Circadian Clock in the Metabolic Syndrome and Nonalcoholic Fatty Liver Disease. Dig Dis Sci 2018; 63:3187-3206. [PMID: 30121811 DOI: 10.1007/s10620-018-5242-x] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 08/06/2018] [Indexed: 12/20/2022]
Abstract
Nonalcoholic fatty liver disease (NAFLD) is the most common chronic liver disease in industrialized nations and is strongly associated with the metabolic syndrome. The prevalence of NAFLD continues to rise along with the epidemic of the metabolic syndrome. Metabolic homeostasis is linked to the circadian clock (rhythm), with multiple signaling pathways in organs regulated by circadian clock genes, and recent studies of circadian clock gene functions suggest that disruption of the circadian rhythm is associated with significant morbidity and mortality, including the metabolic syndrome. In the industrialized world, various human behaviors and activities such as work and eating patterns, jet lag, and sleep deprivation interfere with the circadian rhythm, leading to perturbations in metabolism and development of the metabolic syndrome. In this review, we discuss how disruption of the circadian rhythm is associated with various metabolic conditions that comprise the metabolic syndrome and NAFLD.
Collapse
|
63
|
Castro-Correia C, Santos-Silva R, Pinheiro M, Costa C, Fontoura M. Metabolic risk factors in adolescent girls with type 1 diabetes. J Pediatr Endocrinol Metab 2018; 31:631-635. [PMID: 29750655 DOI: 10.1515/jpem-2018-0053] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 04/16/2018] [Indexed: 02/06/2023]
Abstract
BACKGROUND The incidence of pediatric metabolic syndrome (MS) has progressively increased. The incidence of type 1 diabetes mellitus (T1DM) has also increased. Thus, some children and adolescents with T1DM exhibit MS parameters. The aim of the study was to evaluate the presence of MS parameters in female adolescents with T1DM based on their nutritional status. METHODS We evaluated 44 adolescents with T1DM (consecutive non-randomized sample) aged between 14 and 18 years, who were on intensive therapy with insulin. Patients were subdivided according to their body mass index (BMI). Variables evaluated include: age, age at diagnosis, weight, height, BMI, abdominal circumference, blood pressure, glycated hemoglobin (HbA1c), abdominal and pelvic ultrasound and lipoprotein profile. Gynecological history data were also collected. RESULTS Lipid profile changes were identified in 32% of overweight or obese girls and in 23% of those with an adequate weight. Hypertension (HT) was observed in 19% of overweight or obese girls and in 14% of those with a BMI≥85th percentile (Pc). The only statistically significant difference between the groups was the presence of abdominal adiposity. All other features, including the presence of dyslipidemia, HT, abdominal adiposity, non-alcoholic steatohepatitis (NASH) and polycystic ovarian syndrome (PCOS), were present in both groups. CONCLUSIONS Although being overweight and/or obese aggravates the risk of cardiovascular disease, MS is already present in many young adolescents with T1DM of normal weight. It is necessary that MS risk factors are routinely evaluated in all diabetic adolescents, including those with an adequate BMI.
Collapse
Affiliation(s)
- Cíntia Castro-Correia
- Pediatric Endocrinology Unit, Pediatrics Service, São João Integrated Pediatric Hospital, Alameda Hernani Monteiro, University of Porto Medical School, Porto, Portugal
| | - Rita Santos-Silva
- Pediatric Endocrinology Unit, Pediatrics Service, São João Integrated Pediatric Hospital, Alameda Hernani Monteiro, University of Porto Medical School, Porto, Portugal
| | - Marta Pinheiro
- Pediatric Service, São João Integrated Pediatric Hospital, Alameda Hernâni Monteiro, Porto, Portugal
| | - Carla Costa
- Pediatric Endocrinology Unit, Pediatrics Service, São João Integrated Pediatric Hospital, Alameda Hernani Monteiro, University of Porto Medical School, Porto, Portugal
| | - Manuel Fontoura
- Pediatric Endocrinology Unit, Pediatrics Service, São João Integrated Pediatric Hospital, Alameda Hernani Monteiro, University of Porto Medical School, Porto, Portugal
| |
Collapse
|
64
|
Intestinal epithelial Toll-like receptor 4 prevents metabolic syndrome by regulating interactions between microbes and intestinal epithelial cells in mice. Mucosal Immunol 2018; 11:727-740. [PMID: 29363671 PMCID: PMC6131112 DOI: 10.1038/mi.2017.114] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Accepted: 11/12/2017] [Indexed: 02/04/2023]
Abstract
Little is known about the pathogenesis of metabolic syndrome, although Toll-like receptor 4 (TLR4) has been implicated. We investigated whether TLR4 in the intestinal epithelium regulates metabolic syndrome by coordinating interactions between the luminal microbiota and host genes that regulate metabolism. Mice lacking TLR4 in the intestinal epithelium (TLR4ΔIEC), but not mice lacking TLR4 in myeloid cells nor mice lacking TLR4 globally, developed metabolic syndrome; these features were not observed in TLR4ΔIEC mice given antibiotics. Metagenomic analysis of the fecal microbiota revealed differences between TLR4ΔIEC and wild-type mice, while meta-transcriptome analysis of the microbiota showed that intestinal TLR4 affected the expression of microbial genes involved in the metabolism of lipids, amino acids, and nucleotides. Genes regulated by peroxisome proliferator-activated receptors (PPARs) and the antimicrobial peptide lysozyme were significantly downregulated in TLR4ΔIEC mice, suggesting a mechanism by which intestinal TLR4 could exert its effects on the microbiota and metabolic syndrome. Supportingly, antibiotics prevented both downregulation of PPAR genes and the development of metabolic syndrome, while PPAR agonists prevented development of metabolic syndrome in TLR4ΔIEC mice. Thus, intestinal epithelial TLR4 regulates metabolic syndrome through altered host-bacterial signaling, suggesting that microbial or PPAR-based strategies might have therapeutic potential for this disease.
Collapse
|
65
|
Alshammari GM, Balakrishnan A, Chinnasamy T. Butein protects the nonalcoholic fatty liver through mitochondrial reactive oxygen species attenuation in rats. Biofactors 2018; 44:289-298. [PMID: 29672963 DOI: 10.1002/biof.1428] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Accepted: 03/13/2018] [Indexed: 12/13/2022]
Abstract
One of the worldwide metabolic health dilemma is nonalcoholic fatty liver diseases (NAFLD). Researchers are searching effective drug to manage NAFLD patients. One of the best way to manage the metabolic imperfection is through natural principal isolated from different sources. Butein, a natural compound known to have numerous pharmacological application. In the current study we assessed the therapeutic effect of butein administration on liver function tests, oxidative stress, antioxidants, lipid abnormalities, serum inflammatory cytokines, and mitochondrial reactive oxygen species levels, in rats with methionine-choline deficient (MCD) diet induced NAFLD. Male Wistar rats were treated with MCD diet with/without butein (200 mg/kg body wt. orally) for 6 weeks. The protective effect of butein, were evident from decreased transaminase activities, restoration of albumin, globulin, albumin/globulin ratio, and oxidants in serum (P < 0.01), further it improved liver antioxidant status (P < 0.01). Butein significantly lowered lipid profile parameters (P < 0.01), suppressed inflammatory cytokines (P < 0.01), and improved liver histology. Further to understand the possible mechanism behind the hepatoprotective and lipid lowering effect of butein, the activities of heme oxygenase (HO1), myeloperoxidase (MPO), and mitochondrial reactive oxygen species (ROS) were measured. We found that butein supplementation significantly decreased the activity of HO1 (P < 0.001), and increased the activity of MPO (P < 0.001). Furthermore butein attenuated mitochondrial ROS produced in NAFLD condition. Present study shows that butein supplementation restore liver function by altering liver oxidative stress, inflammatory markers, vital defensive enzyme activities, and mitochondrial ROS. In summary, butein has remarkable potential to develop effective hepato-protective drug. © 2018 BioFactors, 44(3):289-298, 2018.
Collapse
Affiliation(s)
- Ghedeir M Alshammari
- Adipocytes and Metabolic Disorders Lab, Food Science and Nutrition Department, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Aristatile Balakrishnan
- Adipocytes and Metabolic Disorders Lab, Food Science and Nutrition Department, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Thirunavukkarasu Chinnasamy
- Adipocytes and Metabolic Disorders Lab, Food Science and Nutrition Department, King Saud University, Riyadh, 11451, Saudi Arabia
| |
Collapse
|
66
|
Bogolyubova AV, Mayorov AY, Mishina EE, Schwartz AM, Belousov PV. Farnesoid X receptor (FXR) as a potential therapeutic target in nonalcoholic fatty liver disease and associated syndromes. DIABETES MELLITUS 2018. [DOI: 10.14341/dm9374] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Nonalcoholic fatty liver disease (NAFLD) is a group of obesity-associated pathological changes characterized by abnormal accumulation of lipids in cells of the liver parenchyma. NAFLD and associated conditions, namely insulin resistance and type II diabetes mellitus (DM2), as well as the possible risks of developing fibrosis and cirrhosis with a potential outcome in hepatocellular carcinoma, represent the primary health problems in developed countries, gradually replacing the importance of similar pathologies caused by the regular use of hepatotoxic doses of alcoholic beverages. Recent fundamental and clinical studies demonstrated the important role of the farnesoid receptor (FXR, NR1H4) in the regulation of the metabolism of glucose, lipids and bile acids. This review focuses on the molecular aspects of the pathogenesis of NAFLD, the role of FXR (NR1H4) in the biology of this disease, and the prospects for using different FXR (NR1H4) modulators for therapy of NAFLD and associated conditions such as metabolic syndrome and DM2, as well as a number of other FXR (NR1H4) mediated diseases.
Collapse
|
67
|
Abstract
Nonalcoholic fatty liver disease (NAFLD) is a common liver disorder that can be divided into benign steatosis or nonalcoholic fatty liver (NAFL) and nonalcoholic steatohepatitis (NASH). Elastography and scoring systems based on clinical features and routine biochemical testing can be used to assess fibrosis in patients with NAFLD. Patients with fibrosis are thought to have NASH. However, only a liver biopsy can reliably diagnose NAFLD and differentiate NAFL from NASH. Because medical therapy for NASH is not available, it is not necessary to perform a liver biopsy in all patients. Patients suspected of having NASH should undergo liver biopsy.
Collapse
|
68
|
Sharma DL, Lakhani HV, Klug RL, Snoad B, El-Hamdani R, Shapiro JI, Sodhi K. Investigating Molecular Connections of Non-alcoholic Fatty Liver Disease with Associated Pathological Conditions in West Virginia for Biomarker Analysis. ACTA ACUST UNITED AC 2017; 8. [PMID: 29177105 PMCID: PMC5701750 DOI: 10.4172/2155-9899.1000523] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Non-alcoholic fatty liver disease (NAFLD) is a disease characterized by a steatosis of the liver that may progress to more serious pathological conditions including: nonalcoholic steatohepatitis (NASH), fibrosis, and cirrhosis. As the prevalence of NAFLD has increased worldwide in recent years, pathophysiology and risk factors associated with disease progression of NAFLD are at the focus of many studies. NAFLD is related to and shares common serum biomarkers with cardiovascular disease (CVD), type 2 diabetes mellitus (T2DM), obesity, and metabolic syndrome (MetS). West Virginia (WV) is a state with some of the highest rates of CVD, obesity and diabetes mellitus. As NAFLD is closely related to these diseases, it is of particular interest in WV. Currently there is no cost-effective, standardized method used clinically to detect NAFLD prior to the onset of reversible complications. At this time, the diagnosis of NAFLD is made with costly radiologic studies and invasive biopsy. These studies are only diagnostic once changes to hepatic tissue have occurred. The diagnosis of NAFLD by traditional methods may not allow for successful intervention and may not be readily available in areas with already sparse medical resources. In this literature review, we identify a list of biomarkers common among CVD, T2DM, obesity, MetS and NAFLD. From this research we propose the following biomarkers are good candidates for inclusion in a panel of biomarkers for the early detection of NAFLD: adiponectin, AST, ALT, apo-B, CK18, CPS1, CRP, FABP-1, ferritin, GGT, GRP78, HDL-C, IGF-1, IL-1β, 6, 8, 10, IRS-2PAI-1, leptin, lumican, MDA SREBP-1c and TNF-α. Creating and implementing a biomarker panel for the early detection and attenuation of NAFLD, prior to the onset of irreversible complication would provide maximum benefit and decrease the disease burden on the patients and healthcare system of WV.
Collapse
Affiliation(s)
- Dana L Sharma
- Department of Internal Medicine, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV, USA
| | - Hari Vishal Lakhani
- Department of Internal Medicine, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV, USA
| | - Rebecca L Klug
- Department of Surgery, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV, USA
| | - Brian Snoad
- Department of Internal Medicine, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV, USA
| | - Rawan El-Hamdani
- Department of Internal Medicine, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV, USA
| | - Joseph I Shapiro
- Department of Internal Medicine, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV, USA
| | - Komal Sodhi
- Department of Surgery, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV, USA
| |
Collapse
|
69
|
Kohi MP. Gender-Related Differences in Hepatocellular Carcinoma: Does Sex Matter? J Vasc Interv Radiol 2017; 27:1338-1341. [PMID: 27566425 DOI: 10.1016/j.jvir.2016.06.035] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2016] [Revised: 06/28/2016] [Accepted: 06/28/2016] [Indexed: 02/07/2023] Open
Affiliation(s)
- Maureen P Kohi
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, 505 Parnassus Ave., M-361, San Francisco, CA 94143.
| |
Collapse
|
70
|
Benedict M, Zhang X. Non-alcoholic fatty liver disease: An expanded review. World J Hepatol 2017; 9:715-732. [PMID: 28652891 PMCID: PMC5468341 DOI: 10.4254/wjh.v9.i16.715] [Citation(s) in RCA: 469] [Impact Index Per Article: 67.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 02/08/2017] [Accepted: 04/18/2017] [Indexed: 02/06/2023] Open
Abstract
Non-alcoholic fatty liver disease (NAFLD) encompasses the simple steatosis to more progressive steatosis with associated hepatitis, fibrosis, cirrhosis, and in some cases hepatocellular carcinoma. NAFLD is a growing epidemic, not only in the United States, but worldwide in part due to obesity and insulin resistance leading to liver accumulation of triglycerides and free fatty acids. Numerous risk factors for the development of NAFLD have been espoused with most having some form of metabolic derangement or insulin resistance at the core of its pathophysiology. NAFLD patients are at increased risk of liver-related as well as cardiovascular mortality, and NAFLD is rapidly becoming the leading indication for liver transplantation. Liver biopsy remains the gold standard for definitive diagnosis, but the development of noninvasive advanced imaging, biochemical and genetic tests will no doubt provide future clinicians with a great deal of information and opportunity for enhanced understanding of the pathogenesis and targeted treatment. As it currently stands several medications/supplements are being used in the treatment of NAFLD; however, none seem to be the "magic bullet" in curtailing this growing problem yet. In this review we summarized the current knowledge of NAFLD epidemiology, risk factors, diagnosis, pathogenesis, pathologic changes, natural history, and treatment in order to aid in further understanding this disease and better managing NAFLD patients.
Collapse
Affiliation(s)
- Mark Benedict
- Mark Benedict, Xuchen Zhang, Department of Pathology, Yale University School of Medicine, New Haven, CT 06510, United States
| | - Xuchen Zhang
- Mark Benedict, Xuchen Zhang, Department of Pathology, Yale University School of Medicine, New Haven, CT 06510, United States
| |
Collapse
|
71
|
Sodhi K, Srikanthan K, Goguet-Rubio P, Nichols A, Mallick A, Nawab A, Martin R, Shah PT, Chaudhry M, Sigdel S, El-Hamdani M, Liu J, Xie Z, Abraham NG, Shapiro JI. pNaKtide Attenuates Steatohepatitis and Atherosclerosis by Blocking Na/K-ATPase/ROS Amplification in C57Bl6 and ApoE Knockout Mice Fed a Western Diet. Sci Rep 2017; 7:193. [PMID: 28298638 PMCID: PMC5428305 DOI: 10.1038/s41598-017-00306-5] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Accepted: 02/20/2017] [Indexed: 02/07/2023] Open
Abstract
We have previously reported that the α1 subunit of sodium potassium adenosine triphosphatase (Na/K-ATPase), acts as a receptor and an amplifier for reactive oxygen species, in addition to its distinct pumping function. On this background, we speculated that blockade of Na/K-ATPase-induced ROS amplification with a specific peptide, pNaKtide, might attenuate the development of steatohepatitis. To test this hypothesis, pNaKtide was administered to a murine model of NASH: the C57Bl6 mouse fed a “western” diet containing high amounts of fat and fructose. The administration of pNaKtide reduced obesity as well as hepatic steatosis, inflammation and fibrosis. Of interest, we also noted marked improvement in mitochondrial fatty acid oxidation, insulin sensitivity, dyslipidemia and aortic streaking in this mouse model. To further elucidate the effects of pNaKtide on atherosclerosis, similar studies were performed in ApoE knockout mice also exposed to the western diet. In these mice, pNaKtide not only improved steatohepatitis, dyslipidemia, and insulin sensitivity, but also ameliorated significant aortic atherosclerosis. Collectively, this study demonstrates that the Na/K-ATPase/ROS amplification loop contributes significantly to the development and progression of steatohepatitis and atherosclerosis. And furthermore, this study presents a potential treatment, the pNaKtide, for the metabolic syndrome phenotype.
Collapse
Affiliation(s)
- Komal Sodhi
- Departments of Medicine, Surgery, Pathology, and Cardiology, Joan C. Edwards School of Medicine, Marshall University, Huntington, USA
| | - Krithika Srikanthan
- Departments of Medicine, Surgery, Pathology, and Cardiology, Joan C. Edwards School of Medicine, Marshall University, Huntington, USA
| | - Perrine Goguet-Rubio
- Departments of Medicine, Surgery, Pathology, and Cardiology, Joan C. Edwards School of Medicine, Marshall University, Huntington, USA
| | - Alexandra Nichols
- Departments of Medicine, Surgery, Pathology, and Cardiology, Joan C. Edwards School of Medicine, Marshall University, Huntington, USA
| | - Amrita Mallick
- Departments of Medicine, Surgery, Pathology, and Cardiology, Joan C. Edwards School of Medicine, Marshall University, Huntington, USA
| | - Athar Nawab
- Departments of Medicine, Surgery, Pathology, and Cardiology, Joan C. Edwards School of Medicine, Marshall University, Huntington, USA
| | - Rebecca Martin
- Departments of Medicine, Surgery, Pathology, and Cardiology, Joan C. Edwards School of Medicine, Marshall University, Huntington, USA
| | - Preeya T Shah
- Departments of Medicine, Surgery, Pathology, and Cardiology, Joan C. Edwards School of Medicine, Marshall University, Huntington, USA
| | - Muhammad Chaudhry
- Departments of Medicine, Surgery, Pathology, and Cardiology, Joan C. Edwards School of Medicine, Marshall University, Huntington, USA
| | - Saroj Sigdel
- Departments of Medicine, Surgery, Pathology, and Cardiology, Joan C. Edwards School of Medicine, Marshall University, Huntington, USA
| | - Mehiar El-Hamdani
- Departments of Medicine, Surgery, Pathology, and Cardiology, Joan C. Edwards School of Medicine, Marshall University, Huntington, USA
| | - Jiang Liu
- Departments of Medicine, Surgery, Pathology, and Cardiology, Joan C. Edwards School of Medicine, Marshall University, Huntington, USA
| | - Zijian Xie
- Departments of Medicine, Surgery, Pathology, and Cardiology, Joan C. Edwards School of Medicine, Marshall University, Huntington, USA
| | - Nader G Abraham
- Departments of Medicine, Surgery, Pathology, and Cardiology, Joan C. Edwards School of Medicine, Marshall University, Huntington, USA.,Department of Medicine, New York Medical College, Valhalla, NY, 10595, USA
| | - Joseph I Shapiro
- Departments of Medicine, Surgery, Pathology, and Cardiology, Joan C. Edwards School of Medicine, Marshall University, Huntington, USA.
| |
Collapse
|
72
|
An update on the assessment and management of metabolic syndrome, a growing medical emergency in paediatric populations. Pharmacol Res 2017; 119:99-117. [PMID: 28111263 DOI: 10.1016/j.phrs.2017.01.017] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Revised: 01/13/2017] [Accepted: 01/16/2017] [Indexed: 01/19/2023]
Abstract
In the last decades the increasing rate of obesity in children and adolescents worldwide has led to the onset in paediatric age of metabolic syndrome, a disease commonly associated to adulthood. Central obesity, dyslipidaemia, hyperglycaemia, and hypertension are typical features of metabolic syndrome that seem to hesitate often in type 2 diabetes, cardiovascular disease, non-alcoholic fatty liver disease, and many other clinical conditions. Thus preventing and curing metabolic syndrome in paediatric patients is becoming an urgent need for public health. While diagnostic criteria and therapy of metabolic syndrome in adults are very well defined, there is no consensus on the definition of metabolic syndrome in children and adolescents as well as on healing approaches. The aim of this review is to describe the recent advances on the pathogenesis and clinical outcomes of paediatric metabolic syndrome. We then detail the therapeutic strategies (i.e. dietary regimens, physical exercise, nutraceuticals, and medications) employed to manage the disease. Finally, we analyse the safety profile of the drugs used in children and adolescents by performing a retrospective review of paediatric adverse reactions reported in the FDA's Adverse Event Reporting System database.
Collapse
|
73
|
Gu JJ, Yao M, Yang J, Cai Y, Zheng WJ, Wang L, Yao DB, Yao DF. Mitochondrial carnitine palmitoyl transferase-II inactivity aggravates lipid accumulation in rat hepatocarcinogenesis. World J Gastroenterol 2017; 23:256-264. [PMID: 28127199 PMCID: PMC5236505 DOI: 10.3748/wjg.v23.i2.256] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Revised: 09/29/2016] [Accepted: 10/31/2016] [Indexed: 02/06/2023] Open
Abstract
AIM To investigate the dynamic alteration of mitochondrial carnitine palmitoyl transferase II (CPT-II) expression during malignant transformation of rat hepatocytes.
METHODS Sprague-Dawley male rats were fed with normal, high fat (HF), and HF containing 2-fluorenylacetamide (2-FAA) diet, respectively. According to the Hematoxylin and Eosin staining of livers, rats were divided into control, fatty liver, degeneration, precancerous, and cancerous groups. Liver lipids were dyed with Oil Red O, CPT-II alterations were analyzed by immunohistochemistry, and compared with CPT-II specific concentration (μg/mg protein). Levels of total cholesterol (Tch), triglyceride (TG), and amino-transferases [alanine aminotransferase (ALT), aspartate aminotransferase (AST)] were determined by the routine methods.
RESULTS After intake of HF and/or HF+2-FAA diets, the rat livers showed mass lipid accumulation. The lipid level in the control group was significantly lower than that in other groups. The changes of serum TG and Tch levels were abnormally increasing, 2-3 times more than those in the controls (P < 0.05). During the rat liver morphological changes from normal to cancer development process with hepatocyte injury, serum AST and ALT levels were significantly higher (4-8 times, P < 0.05) than those in the control group. The specific concentration of CPT-II in liver tissues progressively decreased during hepatocyte malignant transformation, with the lowest CPT-II levels in the cancer group than in any of the other groups (P < 0.05).
CONCLUSION Low CPT-II expression might lead to abnormal hepatic lipid accumulation, which should promote the malignant transformation of hepatocytes.
Collapse
|