Cited by 622Liver Disease Diagnosis and TreatmentBariatric Surgery and OutcomesOrgan Transplantation Techniques and Outcomes

Bariatric Surgery Provides Long-term Resolution of Nonalcoholic Steatohepatitis and Regression of Fibrosis

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Lassailly, Guillaume, Caiazzo, Robert, Ntandja-Wandji, Line-Carolle, Gnemmi, Viviane, Baud, Gregory, Verkindt, Helene, Ningarhari, Massih, Louvet, Alexandre +5 more·2020·Gastroenterology

Abstract

Background and Aims Studies are needed to determine the long-term effects of bariatric surgery for patients with nonalcoholic steatohepatitis (NASH). We evaluated sequential liver samples, collected the time of bariatric surgery and 1 and 5 years later, to assess the long-term effects of bariatric surgery in patients with NASH. Methods We performed a prospective study of 180 severely obese patients with biopsy-proven NASH, defined by the NASH clinical research network histologic scores. The patients underwent bariatric surgery at a single center in France and were followed for 5 years. We obtained liver samples from 125 of 169 patients (76%) having reached 1 year and 64 of 94 patients (68%) having reached 5 years after surgery. The primary endpoint was the resolution of NASH without worsening of fibrosis at 5 years. Secondary end points were improvement in fibrosis (reduction of ≥1 stage) at 5 years and regression of fibrosis and NASH at 1 and 5 years. Results At 5 years after bariatric surgery, NASH was resolved, without worsening fibrosis, in samples from 84% of patients (n = 64; 95% confidence interval, 73.1%-92.2%). Fibrosis decreased, compared with baseline, in samples from 70.2% of patients (95% CI, 56.6%-81.6%). Fibrosis disappeared from samples from 56% of all patients (95% CI, 42.4%-69.3%) and from samples from 45.5% of patients with baseline bridging fibrosis. Persistence of NASH was associated with no decrease in fibrosis and less weight loss (reduction in body mass index of 6.3 ± 4.1 kg/m 2 in patients with persistent NASH vs reduction of 13.4 ± 7.4 kg/m 2 ; P = .017 with resolution of NASH). Resolution of NASH was observed at 1 year after bariatric surgery in biopsies from 84% of patients, with no significant recurrence between 1 and 5 years ( P = .17). Fibrosis began to decrease by 1 year after surgery and continued to decrease until 5 years ( P < .001). Conclusions In a long-term follow-up of patients with NASH who underwent bariatric surgery, we observed resolution of NASH in liver samples from 84% of patients 5 years later. The reduction of fibrosis is progressive, beginning during the first year and continuing through 5 years.

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Crossref · 10.1053/j.gastro.2020.06.006

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  • In an observational study, MASH was resolved in 84% of 180 individuals with class 2 obesity and MASH 5 years after Roux-en-Y gastric bypass (66%), sleeve gastrectomy (12%) or gastric banding (22%).

    “In an observational study, MASH was resolved in 84% of 180 individuals with class 2 obesity and MASH 5 years after Roux-en-Y gastric bypass (66%), sleeve gastrectomy (12%) or gastric banding (22%).”

    From EASL-EASD-EASO Clinical Practice Guidelines on the management of metabolic dysfunction-associated steatotic liver disease (MASLD). (2024) · cites this paper as [443]

    The Cohort Patients section reports 180 participants with biopsy-proven NASH, and the Primary Outcome section reports resolution without worsening fibrosis in 84.4% of the 64 patients assessed at five years. Supplementary Table 1 supports the rounded percentages for bypass, sleeve gastrectomy and banding, but also lists one patient who had a shunt. Table 1 gives a mean baseline BMI of 48.1 kg/m², so describing all 180 as having class 2 obesity is unsupported; the 84% result also applies to the 64 with five-year biopsies, not all 180. (LLM, conf=0.91)

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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).”
  • Liver fibrosis can be a reversible process under certain conditions, particularly if the underlying cause of injury is removed.

    “One of the most promising developments in the field is the growing consensus that liver fibrosis can be a reversible process under certain conditions, particularly if the underlying cause of injury is removed (84–86).”

    From Targeting macrophages in liver fibrosis (2026) · cites this paper as [85]

  • Procedures such as RYGB and VSG are associated with significant metabolic improvements and reductions in NAFLD severity, including reductions in liver fat, liver enzymes, and fibrosis.

    “Procedures like Roux-en-Y gastric bypass (RYGB) and vertical sleeve gastrectomy (VSG) are associated with significant metabolic improvements and reductions in NAFLD severity [13,14,15], including reductions in liver fat, liver enzymes, and fibrosis [16,17,18].”
  • The reduction of fibrosis after bariatric surgery is progressive, beginning during the first year and continuing through 5 years.

    “The reduction of fibrosis is progressive, beginning during the first year and continuing through 5 years [4,127].”

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Authors
Lassailly, G., Caiazzo, R., Ntandja-Wandji, L.-C., Gnemmi, V., Baud, G., Verkindt, H., Ningarhari, M., Louvet, A., Leteurtre, E., Raverdy, V., Dharancy, S., Pattou, F., & Mathurin, P.
Affiliations
  • Inserm (FR)
  • Centre National de la Recherche Scientifique (FR)
Corresponding author
  • Pattou, François
  • Mathurin, Philippe
Venue
Gastroenterology
Publisher
Elsevier BV
Published
2020-10
Volume
159
Issue
4
Pages
1290-1301.e5
ISSN
0016-5085 (ISSN-L)
OpenAlex
W3034346518
Cited by
622
References
27
Citations by year
2026: 93 · 2025: 105 · 2024: 109 · 2023: 106 · 2022: 108 · 2021: 89 · 2020: 11
FWCI
56.22
Type
journal article
Language
en
Open access
Locations
  • Gastroenterology (acceptedVersion, other-oa)
  • PubMed (publishedVersion)
  • HAL (submittedVersion, cc-by-nc)
  • HAL (submittedVersion)
  • LillOA (Université de Lille (University Of Lille)) (submittedVersion, other-oa)
Funders
  • European Regional Development Fund
  • Agence Nationale de la Recherche (ANR-10-LABX-46, ANR-16-RHUS-0006)
  • Ministère des Affaires Sociales et de la Santé
  • European Commission
Topics
  • Health Sciences › Medicine › Epidemiology › Liver Disease Diagnosis and Treatment
  • Health Sciences › Medicine › Surgery › Bariatric Surgery and Outcomes
  • Health Sciences › Medicine › Surgery › Organ Transplantation Techniques and Outcomes
Keywords
bariatric surgery, nonalcoholic steatohepatitis, liver fibrosis regression, obesity, long-term outcomes, weight loss, NASH resolution, liver biopsy histology, bridging fibrosis, metabolic surgery, liver cancer risk, liver transplantation risk
MeSH terms
Adult, Biopsy, Female, Follow-Up Studies, France, Humans, Liver, Liver Cirrhosis, Male, Middle Aged, Obesity, Morbid, Prospective Studies, Remission Induction, Time Factors, Weight Loss, Treatment Outcome, Bariatric Surgery, Non-alcoholic Fatty Liver Disease

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