The effects of bariatric surgeries on nonalcoholic fatty liver disease
Abstract
Non-alcoholic fatty liver disease (NAFLD) is the most common chronic liver disease and is associated with obesity. Bariatric surgery has been shown to be the most effective method for weight reduction. However, no conclusive data exists on the effects of weight reduction surgery on NAFLD. This study aimed to characterize liver histology, metabolic status, and liver function changes in patients who underwent bariatric surgery, before and after the weight-reduction procedure. This is a phase 1 report of a prospective cohort study of patients who underwent bariatric surgery. Biopsies were obtained at baseline (intraoperatively) and 3 months postoperatively. Clinical characteristics, biochemical profile, and histopathological data [steatosis, NAFLD activity score (NAS), hepatocyte ballooning, lobular inflammation, and degree of fibrosis] were obtained at each time point. Twenty-seven patients were included (9 men and 18 women), and the median age was 35 ± 8 years old. At baseline, 3 patients had dyslipidemia, 4 had diabetes, and 5 patients had hypertension, which did not change at follow-up. The average body mass index decreased from 44.6 ± 7.8 to 34.2 ± 6.3 kg/m 2 at follow-up (P < 0.001). On histopathology, 12 of the 18 patients with preoperative steatosis (median score 2) had reduced steatosis scores postoperatively (P = 0.025); fibrosis (median score 1) was also reduced in 17 patients (P = 0.012), and NAS was decreased from 4 (3-5) to 2 (1-3) (P = 0.004). The changes in lobular inflammation and hepatocyte ballooning were not statistically significant on follow-up. The phase 1 results of this study described the histopathological changes following weight reduction surgery and suggested that hepatic steatosis, fibrosis, and NAFLD activity score were reduced 3 months after surgery. This clinical trial is financially supported by the National Plan for Science, Technology and Innovation Program grant number (11-MED1910-02).
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Marked weight loss achieved through bariatric surgery is associated with improvements in glucose levels and cardiac structure and function in patients with obesity and T2DM.
“Indeed, marked weight loss achieved through bariatric surgery is associated with improvements in glucose levels and cardiac structure and function in patients with obesity and T2DM.14, 15, 16”
From The cardioprotective effects of semaglutide exceed those of dietary weight loss in mice with HFpEF (2023) · cites this paper as [16]
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- Authors
- Aldoheyan, T., Hassanain, M., Al-Mulhim, A., Al-Sabhan, A., Al-Amro, S., Bamehriz, F., & Al-Khalidi, H.
- Affiliations
- King Saud University (SA)
- Emory University (US)
- Corresponding author
- Hassanain, Mazen
- Venue
- Surgical Endoscopy
- Published
- 2016-07-12
- Volume
- 31
- Issue
- 3
- Pages
- 1142-1147
- ISSN
- 0930-2794 (ISSN-L)
- 1432-2218
- OpenAlex
- W2466141210
- Cited by
- 47
- References
- 40
- Citations by year
- 2026: 3 · 2025: 2 · 2024: 5 · 2023: 5 · 2022: 2 · 2021: 6 · 2020: 7 · 2019: 11 · 2018: 2 · 2017: 2 · 2016: 2
- FWCI
- 6.27
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Surgical Endoscopy (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Surgery › Bariatric Surgery and Outcomes
- Health Sciences › Medicine › Epidemiology › Liver Disease Diagnosis and Treatment
- Health Sciences › Medicine › Surgery › Organ Transplantation Techniques and Outcomes
- Keywords
- bariatric surgery, non-alcoholic fatty liver disease, weight loss, hepatic steatosis, liver fibrosis, NAFLD activity score, liver histopathology, obesity, lobular inflammation, hepatocyte ballooning
- MeSH terms
- Adult, Biopsy, Female, Humans, Liver, Male, Obesity, Morbid, Cohort Studies, Hepatocytes, Bariatric Surgery, Non-alcoholic Fatty Liver Disease
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
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