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The Impact of Obesity and Nutrition on Chronic Liver Diseases, An Issue of Clinics in Liver Disease, E-Book

The Impact of Obesity and Nutrition on Chronic Liver Diseases, An Issue of Clinics in Liver Disease, E-Book

Zobair Younossi

(2014)

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Book Details

Abstract

Internationally renowned experts present topics related to obesity, nutrition, and liver disease in this issue. In the first article, the epidemiology of obesity and its association with liver disease are covered. The following two articles focus on the roles that visceral adipose tissue and microbiota potentially play in the pathogenesis of obesity-related liver disease. The next article focuses on the hepatic pathology seen in patients with obesity-related liver disease and those with malnutrition. The next five articles are focused on NAFLD and provide in-depth data on the natural history and treatment strategies for patients with NAFLD. The next six articles deal with the impact of obesity on other liver diseases and on special populations including children and liver-transplant recipients. The final article provides the most updated information regarding genomics and genetic targets that may provide better prognostic and diagnostic biomarkers and more personalized treatment targets for patients with NAFLD. Cutting-edge information in this issue will help readers gain better understanding of the natural history and pathogenesis of primary and secondary liver diseases associated with obesity. As the information about obesity-related liver disease expands, clinicians will be able to provide more targeted therapeutic options for these patients and develop more accurate diagnostic and prognostic biomarkers.

Table of Contents

Section Title Page Action Price
Front Cover Cover
Contributors iii
Consulting Editor iii
Editor iii
Authors iii
Contents vii
Preface: Obesity and Liver Diseasexiii vii
Obesity and Liver Disease: The Epidemic of the Twenty-First Century1 vii
Obesity-Associated Nonalcoholic Fatty Liver Disease19 vii
The Impact of Obesity on Liver Histology33 vii
New Potential Pathways for the Pathogenesis of NAFLD vii
Adipose Tissue as an Endocrine Organ41 vii
Obesity and NAFLD: The Role of Bacteria and Microbiota59 viii
Treatment viii
The Role of Medications for the Management of Patients with NAFLD73 viii
The Role of Diet and Nutritional Intervention for the Management of Patients with NAFLD91 viii
Role of Exercise in Optimizing the Functional Status of Patients with Nonalcoholic Fatty Liver Disease113 ix
Surgical Management of Obesity in Patients with Morbid Obesity and Nonalcoholic Fatty Liver Disease129 ix
Obesity, Nutrition, and Other Liver Diseases ix
The Impact of Obesity and Metabolic Syndrome on Chronic Hepatitis C147 ix
The Impact of Obesity and Metabolic Syndrome on Alcoholic Liver Disease157 ix
The Impact of Obesity and Metabolic Syndrome on Chronic Hepatitis B and Drug-Induced Liver Disease165 x
Special Topics x
Nutrition in Cirrhosis and Chronic Liver Disease179 x
Obesity and Liver Cancer191 x
Impact of Nutrition and Obesity on Chronic Liver Disease205 x
Obesity, Nutrition, and Liver Disease in Children219 xi
The Interactions of Nonalcoholic Fatty Liver Disease and Cardiovascular Diseases233 xi
Host Genetic Variants in Obesity-Related Nonalcoholic Fatty Liver Disease249 xi
Obesity and Liver Disease xiii
Obesity and Liver Disease 1
Key points 1
Introduction 1
Challenges in obesity 2
Prevalence of obesity 3
Obesity-related morbidity and mortality 3
Pathophysiology of obesity 4
Role of the GI Tract in Energy Homeostasis 4
Bile Acids 5
Microbiota 5
The Liver and Weight Regulation 6
Obesity and liver disease 6
NAFLD 6
Hepatitis C 7
Hepatocellular Carcinoma 7
Cirrhosis and Decompensated Liver Disease 8
Treatment of obesity 8
Lifestyle-Based Therapy 8
Pharmacotherapy 10
Bariatric Surgery 13
Summary 14
References 14
Obesity-Associated Nonalcoholic Fatty Liver Disease 19
Key points 19
Introduction 19
Prevalence and incidence of obesity-associated NAFLD 21
Worldwide differences in obesity-associated NAFLD 23
Clinical correlations 24
Summary 25
References 26
The Impact of Obesity on Liver Histology 33
Key points 33
Normal liver and nonspecific or physiologic steatosis 33
Obesity-related steatosis and nonalcoholic fatty liver disease 34
Nonalcoholic steatohepatitis 35
Cryptogenic cirrhosis 37
Primary hepatic neoplasms—hepatocellular adenoma and hepatocellular carcinoma 38
References 38
Adipose Tissue as an Endocrine Organ 41
Key points 41
Introduction 41
Visceral fat composition 42
Adipokines and cytokines derived from visceral fat 44
Hypoxia 45
Hepcidin 45
H1F1 48
Mitochondrial Dysfunction 48
Inflammation 49
Insulin resistance 50
Hormone imbalances 51
Summary 52
References 52
Obesity and NAFLD 59
Key points 59
Introduction 59
Gut microbiota and obesity 60
Pathogenesis of Microbiota-associated Obesity 61
Gut microbiota and NAFLD 62
Pathophysiologic Basis of NAFLD 62
Small intestinal bacterial overgrowth and intestinal permeability 63
Innate immunity, TLRs, and inflammasomes 64
Impaired choline metabolism 65
Altered bile acid metabolism 66
Endogenous ethanol 66
Probiotics, Antibiotics, and Prebiotics in Obesity and NAFLD 66
Summary 67
References 67
The Role of Medications for the Management of Patients with NAFLD 73
Key points 73
Introduction 73
Insulin sensitizers 74
Metformin 74
Glitazones (Thiazolidinediones) 76
Lipid-lowering drugs, antioxidant and hepatoprotective agents 77
Statins 77
Ezetimibe 78
Fibrates 78
Polyunsaturated Fatty Acids 79
Orlistat 79
Vitamin E 79
Pentoxifylline 80
Sylibin 80
Bile acids and derivatives 80
Ursodeoxycholic Acid (UDCA) 80
New areas of research 81
Obeticholic Acid and Farnesoid X Receptor Agonists 82
Incretin Mimetics 82
PPAR-δ Agonists 82
PPAR-α/δ Agonists 83
Endocannabinoids (Cannabinoid Receptor Blockers Type 1 and Type 2 (CB1 and CB2)) 83
Drugs Modulating the Renin-Angiotensin System (RAS) 83
Lysyl Oxidase-Like-2 Inhibitory Monoclonal Antibody 84
Summary 84
References 84
The Role of Diet and Nutritional Intervention for the Management of Patients with NAFLD 91
Key points 91
Introduction 91
Weight loss: the main target of diet intervention 92
Macronutrient effects in NAFLD 96
Low-CHO Versus a Low-Fat Diet 96
Glycemic Index and Fructose 98
Lipids: the Good, the Bad, and the Ugly 99
Is a High-Protein Diet Good for NAFLD? 100
Role of micronutrients, antioxidants, and fiber 101
Practical approaches to nutritional intervention in NAFLD 105
Summary 106
References 107
Role of Exercise in Optimizing the Functional Status of Patients with Nonalcoholic Fatty Liver Disease 113
Key points 113
Introduction 113
Definitions: function, activity, and exercise 114
Function and NAFLD 115
Exercise for NAFLD 117
Diet and exercise 119
Behavioral considerations supporting adoption of therapeutic exercise and healthy eating 120
Summary and recommendations 123
References 123
Surgical Management of Obesity in Patients with Morbid Obesity and Nonalcoholic Fatty Liver Disease 129
Key points 129
Introduction 129
Laparoscopic bariatric-metabolic surgery 130
Indications 130
Mechanism of Action 133
Procedure Choice 133
The established benefits BM surgery 133
BM surgery in patients with NAFLD 133
Studies Examining Paired Liver Biopsies 136
Procedure-specific Concerns 140
BM Surgery in Patients with Cirrhosis 140
BM Surgery Complements Established Therapy 141
Future direction 141
References 141
The Impact of Obesity and Metabolic Syndrome on Chronic Hepatitis C 147
Key points 147
Introduction 147
Definitions 148
HCV and IR 149
HCV and steatosis 150
HCV and other components of the metabolic syndrome 151
HCV and the metabolic syndrome: does it matter? 151
Summary 153
References 153
The Impact of Obesity and Metabolic Syndrome on Alcoholic Liver Disease 157
Key points 157
Epidemiology of ALD 157
Spectrum of ALD 157
Obesity on the progression of ALD 158
Obesity and metabolic syndrome on the mortality of ALD 159
Obesity and alcohol on hepatic carcinogenesis 160
Diabetes on the progression of ALD 160
Clinical management and future direction 160
Summary 161
References 161
The Impact of Obesity and Metabolic Syndrome on Chronic Hepatitis B and Drug-Induced Liver Disease 165
Key points 165
Chronic hepatitis B 165
Prevalence and determinants of steatosis in patients with CHB 165
Molecular mechanisms and factors associated with steatosis in patients with CHB 167
Impact of steatosis and metabolic cofactors on the severity of liver injury and disease outcomes 169
Role of Steatosis 169
Role of IR and Metabolic Factors 169
Impact on therapeutic outcomes 170
Summary 171
Drug-induced liver disease 171
Idiosyncratic DILI 172
Intrinsic DILI 172
Acetaminophen 172
Methotrexate 173
Anesthetic drugs 173
Summary 174
References 174
Nutrition in Cirrhosis and Chronic Liver Disease 179
Key points 179
Introduction 179
Prevalence 180
Pathogenesis 180
Poor nutrient intake 180
Impaired digestion, absorption, and metabolism 181
Nutritional assessment 181
Nutritional recommendations 184
Summary 187
References 188
Obesity and Liver Cancer 191
Key points 191
Introduction 191
Obesity and hepatocellular carcinoma 192
Hepatocellular carcinoma and obesity in the setting of nonalcoholic fatty liver disease 194
Hepatocellular carcinoma in noncirrhotic liver with nonalcoholic fatty liver disease 195
Obesity as a risk factor for hepatocellular carcinoma arising in chronic liver disease of different etiology 197
Mechanisms of hepatocellular carcinoma carcinogenesis in obesity 197
Summary 200
References 200
Impact of Nutrition and Obesity on Chronic Liver Disease 205
Key points 205
Introduction 205
Role of the liver in nutrient metabolism 206
Malnutrition and chronic liver disease 206
Obesity and chronic liver disease 209
Assessment of nutritional status 211
General management strategies for poor nutritional status in chronic liver disease 211
Summary 212
References 212
Obesity, Nutrition, and Liver Disease in Children 219
Key points 219
Scope of the problem 219
Epidemiology of Obesity 219
Comorbid Conditions 220
Nonalcoholic or Metabolic Fatty Liver Disease 220
Evaluation of obesity in children 220
Evaluation of NAFLD in children 221
Serum Biomarkers 221
Imaging Techniques 222
Liver Biopsy 223
Treatment 223
Goals 223
Interventions for Obesity 224
Family-based behavioral treatment 224
Dietary 225
Pharmacologic 225
Interventions for NAFLD 226
Nonpharmacologic 226
Pharmacologic 226
Insulin-sensitizing agents 226
Hepatoprotective, antioxidant therapy 227
Summary 227
References 227
The Interactions of Nonalcoholic Fatty Liver Disease and Cardiovascular Diseases 233
Key points 233
NAFLD and surrogate markers of atherosclerosis 234
NAFLD and mortality 235
NAFLD and CV events 236
Possible mechanisms linking NAFLD and CVD 241
Framingham score to predict CVD in patients with NAFLD 243
Summary 243
References 243
Host Genetic Variants in Obesity-Related Nonalcoholic Fatty Liver Disease 249
Key points 249
Introduction 249
Genetic association studies 251
Genetic variants associated with NAFLD 251
Polymorphisms in Genes Involved in the Synthesis, Storage, and Export of Hepatic Triglyceride 251
Microsomal triglyceride transport protein 252
Phosphatidylethanolamine N-methyltransferase 252
Patatin-like phospholipase domain-containing 3 253
Other gene variants 253
Polymorphism in Genes Influencing Lipid Metabolism 254
Apolipoprotein C-III 254
Peroxisome proliferator-activated receptor-alpha 254
Peroxisome proliferator-activated receptor g coactivator 1-alpha 255
Peroxisome proliferator-activated receptor-gamma 255
Lipin1 255
Fatty Acid Transport Protein 5 256
Beta-adrenergic receptor 256
Polymorphisms in Genes Involved in Adipogenesis, Appetite Regulation, Fibrosis, Oxidative Load, and Inflammation 257
Methylenetetrahydrofolate reductase 257
Tumor necrosis factor α 258
Transforming growth factor beta 1 and angiotensin II 258
Leptin receptor 259
Adiponectin 259
Human hemochromatosis protein 260
Summary 261
References 261
Index 269
A 269
B 270
C 270
D 271
E 271
F 272
G 272
H 272
I 273
L 274
M 274
N 275
O 277
P 278
R 279
S 279
T 279
U 279
V 279
W 280