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Management of nonalcoholic fatty liver disease: Lessons learned from type 2 diabetes.

ABSTRACT: Nonalcoholic fatty liver disease (NAFLD) is considered the hepatic manifestation of insulin resistance, which is the hallmark of type 2 diabetes (T2D). NAFLD is a known risk factor for developing T2D and has a very high prevalence in those with existing T2D. The diabetes spectrum includes several conditions from prediabetes to T2D to insulin-dependent diabetes leading to macrovascular and microvascular complications. Similarly, NAFLD has a histologic spectrum that ranges from the relatively benign nonalcoholic fatty liver to the aggressive form of nonalcoholic steatohepatitis with or without liver fibrosis to nonalcoholic steatohepatitis-cirrhosis leading to end-stage liver disease. The management of T2D has witnessed significant changes over the past few decades with multiple new drug classes entering the treatment algorithm. Unfortunately, there are no U.S. Food and Drug Administration-approved medications to treat NAFLD, and guidelines for the management of NAFLD are less established. However, the field of drug development in NAFLD has witnessed a revolution over the past 5 years with the establishment of a regulatory pathway for Food and Drug Administration approval; this has generated substantial interest from pharmaceutical companies. Several diabetes medications have been studied as potential treatments for NAFLD with promising results; moreover, drugs that target specific pathways that play a role in NAFLD development and progression are being developed at a rapid pace. Given the similarities between NAFLD and T2D in terms of pathogenesis, underlying risk factors, and disease spectrum, lessons learned from optimizing treatment for T2D can be extrapolated to the management of NAFLD. The aim of this review is to use the founding principles of the comprehensive type 2 diabetes management algorithm to optimize the management of NAFLD. (Hepatology Communications 2018;2:778-785).

SUBMITTER: Alkhouri N

PROVIDER: S-EPMC6049065 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature

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Management of nonalcoholic fatty liver disease: Lessons learned from type 2 diabetes.

Alkhouri Naim N Poordad Fred F Lawitz Eric E

Hepatology communications 20180607 7

Nonalcoholic fatty liver disease (NAFLD) is considered the hepatic manifestation of insulin resistance, which is the hallmark of type 2 diabetes (T2D). NAFLD is a known risk factor for developing T2D and has a very high prevalence in those with existing T2D. The diabetes spectrum includes several conditions from prediabetes to T2D to insulin-dependent diabetes leading to macrovascular and microvascular complications. Similarly, NAFLD has a histologic spectrum that ranges from the relatively beni ...[more]

PMID: 30027137

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Project description:ImportanceNonalcoholic fatty liver disease (NAFLD) is a major chronic liver disease in children in the United States and is associated with insulin resistance. In adults, NAFLD is also associated with type 2 diabetes. To our knowledge, the prevalence of type 2 diabetes in children with NAFLD is unknown.ObjectiveTo determine the prevalence of type 2 diabetes and prediabetes in children with NAFLD and assess type 2 diabetes and prediabetes as risk factors for nonalcoholic steatohepatitis (NASH).Design, setting, and participantsThis was a multicenter, cross-sectional study at 12 pediatric clinical centers across the United States participating in the National Institute of Diabetes and Digestive and Kidney Diseases NASH Clinical Research Network. Children younger than 18 years with biopsy-confirmed NAFLD enrolled in the NASH Clinical Research Network.Main outcomes and measuresThe presence of type 2 diabetes and prediabetes as determined by American Diabetes Association screening criteria using clinical history and fasting laboratory values.ResultsThere were 675 children with NAFLD included in the study with a mean age of 12.6 years and mean body mass index (calculated as weight in kilograms divided by height in meters squared) of 32.5. Most of the children were boys (480 of 675) and Hispanic (445 of 675).The estimated prevalence of prediabetes was 23.4% (95% CI, 20.2%-26.6%), and the estimated prevalence of type 2 diabetes was 6.5% (95% CI, 4.6%-8.4%). Girls with NAFLD had 1.6 (95% CI, 1.04-2.40) times greater odds of having prediabetes and 5.0 (95% CI, 2.49-9.98) times greater odds of having type 2 diabetes than boys with NAFLD. The prevalence of NASH was higher in those with type 2 diabetes (43.2%) compared with prediabetes (34.2%) or normal glucose (22%) (P < .001). The odds of having NASH were significantly higher in those with prediabetes (OR, 1.9; 95% CI, 1.21-2.9) or type 2 diabetes (OR, 3.1; 95% CI, 1.5-6.2) compared with those with normal glucose.Conclusions and relevanceIn this study, nearly 30% of children with NAFLD also had type 2 diabetes or prediabetes. These children had greater odds of having NASH and thus were at greater long-term risk for adverse hepatic outcomes.

Project description:BACKGROUND:Fatty liver is associated with obesity, type 2 diabetes, hyperlipidemia, hypertension, and metabolic syndrome. While there are no approved drugs for the treatment of nonalcoholic fatty liver disease (NAFLD) or nonalcoholic steatohepatitis, strategies to ameliorate fatty liver often target these related diseases. We sought to determine if any medications approved by the US Food and Drug Administration to treat diabetes are helpful in reducing weight and improving steatohepatitis in patients with NAFLD. METHODS:We conducted a systematic review of published and unpublished studies evaluating the comparative effectiveness and harms of diabetes medications for the treatment of NAFLD. We searched MEDLINE, EMBASE, Cochrane Database of Systematic Reviews, and the Cochrane Central Register of Controlled Trials through 3rd quarter, 2019 using terms for included drugs and indications. RESULTS:We screened 1591 citations and included 18 trials of diabetes drugs to treat NAFLD. Studies of metformin found no difference from placebo in steatosis, fibrosis, NAFLD activity score, or resolution of NASH. While weight and glucose control were improved with metformin, it did not substantially impact liver disease. Studies of pioglitazone in NASH patients found benefits in liver function, liver fat, and NASH resolution, though significant increases in weight may be cause for concern. Evidence for other thiazolinediones was more limited and had somewhat mixed results, but findings were generally consistent with those for pioglitazone: liver fat and function and glucose measures improved, but weight also increased. We found some evidence that liraglutide improves liver fat, liver function, and HbA1c and is effective at resolving NASH and reducing weight. Exenatide performed less well but also resulted in significant reductions in liver fat and weight. CONCLUSIONS:Consistent with existing clinical practice guidelines, which recommend lifestyle intervention and treatment for comorbidities related to fatty liver disease as first-line treatment, trial evidence supports the efficacy of some diabetes drugs (especially pioglitazone) in patients with NAFLD or NASH, though weight gain with some diabetes drugs may warrant caution. Larger trials are needed to better characterize the efficacy and harms of diabetes pharmacotherapy in these patients.

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Management of nonalcoholic fatty liver disease: Lessons learned from type 2 diabetes.

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Management of nonalcoholic fatty liver disease: Lessons learned from type 2 diabetes.

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