Cited by 450Liver Disease Diagnosis and TreatmentLiver Diseases and ImmunityLiver physiology and pathology

Thiazolidinediones and Advanced Liver Fibrosis in Nonalcoholic Steatohepatitis: A Meta-analysis

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Musso, Giovanni, Cassader, Maurizio, Paschetta, Elena, Gambino, Roberto·2017·JAMA Internal Medicine

Abstract

Importance: Nonalcoholic steatohepatitis (NASH) is projected to be the leading cause of liver transplantation by 2020. Advanced fibrosis (stage F3-F4) on liver biopsy independently predicts all-cause and liver-related mortality in NASH. There are no known efficacious treatments for advanced fibrosis related to NASH. Thiazolidinedione therapy has been extensively evaluated in NASH, and new randomized clinical trials (RCTs) of its efficacy have been completed. Objective: To synthesize the evidence about the association of thiazolidinedione therapy with advanced liver fibrosis in NASH. Data Sources: MEDLINE, Ovid MEDLINE In-Process, Cochrane Library, EMBASE, clinicaltrials.gov, PubMed, and Scopus databases (without language restrictions), as well as other registries and scientific meeting presentations, from database inception through August 15, 2016. Study Selection: Randomized clinical trials evaluating the effect of thiazolidinedione therapy on histologic features of the liver in biopsy-proven NASH. Data Extraction and Synthesis: Two investigators extracted study data independently and in duplicate and rated the risk of bias using the Cochrane Risk of Bias Tool. Main Outcomes and Measures: The primary outcome was a dichotomous improvement in advanced fibrosis on liver biopsy, defined as an improvement in fibrosis stage from F3-F4 to F0-F2. Secondary outcomes were at least a 1-point improvement in fibrosis of any stage and NASH resolution. This meta-analysis also evaluated adverse effects of thiazolidinedione therapy, including weight gain, lower limb edema, congestive heart failure, bone fractures, cancer, and anemia. With the use of random-effects models, dichotomous variables are presented as odds ratios (ORs) with 95% CIs, and continuous variables are presented as weighted mean differences with 95% CIs. Results: This study analyzed 8 RCTs (5 evaluating pioglitazone use and 3 evaluating rosiglitazone maleate use) enrolling 516 patients with biopsy-proven NASH for a duration of 6 to 24 months. Among all studies combined, thiazolidinedione therapy was associated with improved advanced fibrosis (OR, 3.15; 95% CI, 1.25-7.93; P = .01; I2 = 0%), fibrosis of any stage (OR, 1.66; 95% CI, 1.12-2.47; P = .01; I2 = 0%), and NASH resolution (OR, 3.22; 95% CI, 2.17-4.79; P < .001; I2 = 0%). Analyses restricted to RCTs enrolling patients without diabetes yielded similar results for improvement in advanced fibrosis (OR, 2.95; 95% CI, 1.04-10.90; P = .02; I2 = 0%), improvement in fibrosis of any stage (OR, 1.76; 95% CI, 1.02-3.03; P = .02; I2 = 0%), and NASH resolution (OR, 3.40; 95% CI, 1.95-5.93; P < .001; I2 = 0%). All effects were accounted for by pioglitazone use. Weight gain and lower limb edema occurred more frequently with thiazolidinedione therapy (initial body weight +2.70%; 95% CI, 1.96%-4.34%; P = .001). The small sample size of included RCTs prevented evaluation of more serious adverse effects of thiazolidinedione therapy. Conclusions and Relevance: Pioglitazone use improves advanced fibrosis in NASH, even in patients without diabetes. Whether this finding translates to improvement in risk for clinical outcomes requires further study.

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Crossref · 10.1001/jamainternmed.2016.9607

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  • Pioglitazone therapy, GLP-1 RA therapy, and metabolic surgery have all been shown to reduce NASH activity; pioglitazone therapy and metabolic surgery may also improve hepatic fibrosis.

    “Pioglitazone therapy, GLP-1 RA therapy, and metabolic surgery have all been shown to reduce NASH activity; pioglitazone therapy and metabolic surgery may also improve hepatic fi brosis (188,292 -298).”

    From Management of Hyperglycemia in Type 2 Diabetes, 2022. A Consensus Report by the American Diabetes Association (ADA) and the European Association for the Study of Diabetes (EASD) (2022) · cites this paper as [293]

    The Discussion (page not provided) reports NASH resolution and improved fibrosis with thiazolidinedione therapy, mainly attributable to pioglitazone. The paper does not provide evidence for the sentence’s claims about GLP-1 receptor agonists or metabolic surgery. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • In MASH, treatment with pioglitazone was repeatedly associated with improvements in liver histology, despite a net weight gain of 2-4% of body weight.

    “In MASH, treatment with pioglitazone, the most prescribed PPARγ agonistic drug over the last decades, was repeatedly associated with improvements in liver histology, despite a net weight gain of 2-4 % of body weight (Table 1) [176,177].”
  • PPARα agonist action on lipid metabolism is driven by stimulation of hepatic fatty acid transport, lipolysis and peroxisomal as well as mitochondrial β-oxidation.

    “PPARα agonist action on lipid metabolism is driven by stimulation of hepatic fatty acid transport, lipolysis and peroxisomal as well as mitochondrial β-oxidation [172].”

    From Obesity and MASLD: Is weight loss the (only) key to treat metabolic liver disease? (2024) · cites this paper as [172]

    The Data Sources and Searches section identifies thiazolidinediones as PPAR-γ agonists, and the Discussion addresses their effects on NASH fibrosis. Neither section explains PPARα action on lipid metabolism. Searches for hepatic fatty acid transport, lipolysis, and mitochondrial or peroxisomal β-oxidation found no passage addressing the claimed mechanism. (LLM, conf=0.76)

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Authors
Musso, G., Cassader, M., Paschetta, E., & Gambino, R.
Affiliations
  • Ospedale Humanitas Gradenigo (IT)
  • University of Turin (IT)
Corresponding author
Musso, Giovanni
Venue
JAMA Internal Medicine
Published
2017-05-01
Volume
177
Issue
5
Pages
633
ISSN
2168-6106 (ISSN-L)
OpenAlex
W2593506275
Cited by
449
References
31
Citations by year
2026: 37 · 2025: 49 · 2024: 45 · 2023: 69 · 2022: 58 · 2021: 66 · 2020: 39 · 2019: 33 · 2018: 32 · 2017: 18 · 2016: 2
FWCI
26.12
Type
journal article
Language
en
Open access
Locations
  • JAMA Internal Medicine (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Institutional Research Information System University of Turin (University of Turin) (submittedVersion, other-oa)
Topics
  • Health Sciences › Medicine › Epidemiology › Liver Disease Diagnosis and Treatment
  • Health Sciences › Medicine › Hepatology › Liver Diseases and Immunity
  • Health Sciences › Medicine › Hepatology › Liver physiology and pathology
Keywords
thiazolidinediones, nonalcoholic steatohepatitis, advanced liver fibrosis, pioglitazone, rosiglitazone, NASH resolution, adverse drug reactions, weight gain, congestive heart failure, anemia, drug safety, liver transplantation risk, risk of bias assessment, risk of bias
MeSH terms
Pioglitazone, Diabetes Mellitus, Type 2, Humans, Hypoglycemic Agents, Treatment Outcome, Disease Progression, Thiazolidinediones, Non-alcoholic Fatty Liver Disease, Protective Factors

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