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Nonalcoholic fatty liver disease: Improvement in liver histological analysis with weight loss
Open accessAbstract
The effect of significant weight loss on nonalcoholic fatty liver disease remains unclear. In this case series of 36 selected obese patients, we examined the effect of weight loss on nonalcoholic fatty liver disease, including nonalcoholic steatohepatitis (NASH) and hepatic fibrosis. These 36 patients (11 males, 25 females) had paired liver biopsies, the first at the time of laparoscopic adjustable gastric band placement and the second after weight loss. Second biopsies were obtained from two groups: those requiring a subsequent laparoscopic procedure (n = 19) and those with index biopsy score of 2 or greater for zone 3-centric hepatic fibrosis (n = 17). All biopsies were scored, blinded to the patient's identity and clinical condition, for individual histological features and for NASH stage and grade. Initial biopsies demonstrated NASH in 23 patients and steatosis in 12 patients. Repeat biopsies were taken at 25.6 ± 10 months (range, 9-51 months) after band placement. Mean weight loss was 34.0 ± 17 kg, and percentage of excess weight loss was 52 ± 17%. There were major improvements in lobular steatosis, necroinflammatory changes, and fibrosis at the second biopsy ( P < .001 for all). Portal abnormalities remained unchanged. Only four of the repeat biopsies fulfilled the criteria for NASH. There were 18 patients with an initial fibrosis score of 2 or more compared with 3 patients at follow-up ( P < .001). Those with the metabolic syndrome (n = 23) had more extensive changes before surgery and greater improvement with weight loss. In conclusion , weight loss after surgery provides major improvement or resolution of obesity and metabolic syndrome-associated abnormal liver histological features in severely obese subjects. (Hepatology 2004;39:1647-1654.)
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“In a seminal biopsy study by Dixon et al., 36 adults underwent paired liver biopsies at ~2 years after AGB: nearly all showed major reductions in lobular steatosis, inflammation, and fibrosis (p < 0.001).”
From Impact of Bariatric Surgery and Endoscopic Therapies on Liver Health in Metabolic Dysfunction-Associated Steatotic Liver Disease: A Review (2025) · cites this paper as [45]
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“The proportion meeting NASH criteria fell from 64% pre-operatively to ~11% on follow-up”
From Impact of Bariatric Surgery and Endoscopic Therapies on Liver Health in Metabolic Dysfunction-Associated Steatotic Liver Disease: A Review (2025) · cites this paper as [45]
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“and the number of patients with significant fibrosis (stage ≥ 2) dropped from 18 to three (p < 0.001) [45].”
From Impact of Bariatric Surgery and Endoscopic Therapies on Liver Health in Metabolic Dysfunction-Associated Steatotic Liver Disease: A Review (2025) · cites this paper as [45]
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“Clinical interventions such as weight loss resulting from dietary changes, bariatric surgery, pharmacological agents, or the use of farnesoid X receptor (FXR) agonists have been associated with fibrosis regression in patients with MASH (256-258).”
From Found in translation—Fibrosis in metabolic dysfunction–associated steatohepatitis (MASH) (2023) · cites this paper as [257]
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Metadata
- Authors
- Dixon, J. B., Bhathal, P. S., Hughes, N. R., & O'Brien, P. E.
- Affiliations
- The University of Melbourne (AU)
- Corresponding author
- Dixon, John B.
- ORCID
- Dixon, John B.
- Venue
- Hepatology
- Published
- 2004-06
- Volume
- 39
- Issue
- 6
- Pages
- 1647-1654
- ISSN
- 0270-9139 (ISSN-L)
- OpenAlex
- W2063671857
- Cited by
- 727
- References
- 35
- Citations by year
- 2026: 5 · 2025: 11 · 2024: 11 · 2023: 11 · 2022: 19 · 2021: 27 · 2020: 20 · 2019: 31 · 2018: 26 · 2017: 36 · 2016: 32 · 2015: 44 · 2014: 33 · 2013: 38 · 2012: 38
- FWCI
- 40.65
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Hepatology (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Hepatology › Liver Disease Diagnosis and Treatment
- Health Sciences › Medicine › Surgery › Bariatric Surgery and Outcomes
- Health Sciences › Medicine › Hepatology › Liver physiology and pathology
- Keywords
- non-alcoholic fatty liver disease, nonalcoholic steatohepatitis, liver fibrosis, weight loss, laparoscopic adjustable gastric band, bariatric surgery, obesity, metabolic syndrome, liver histopathology, steatosis, necroinflammation
- MeSH terms
- Adult, Fatty Liver, Female, Humans, Male, Weight Loss
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