Weight-loss surgery can decrease liver damage
Washington: Researchers have said that bariatric surgery, which is best known for its ability to help patients lose substantial weight, can also result in significant improvement in nonalcoholic fatty liver disease (NAFLD).
Researchers at the University of South Florida-Tampa found that bariatric surgery resolved liver inflammation and reversed early-stage liver fibrosis, the thickening and scarring of liver tissue, by reducing fat deposits in the liver.
Michel Murr, MD, lead researcher of the study, professor of surgery and director of Tampa General Hospital and USF Health Bariatric Center, said their findings suggest that providers should consider bariatric surgery as the treatment of choice for nonalcoholic fatty liver disease in severely obese patients.
Researchers compared liver biopsies from 152 patients - one at the time of the bariatric procedure and a second an average of 29 months afterwards.
In examining pre-operative biopsies, researchers identified patients with cellular-level manifestations of nonalcoholic fatty liver disease, specifically, fat deposits and inflammation of the liver. These types of liver damage can lead to liver fibrosis and cirrhosis, which can be life-threatening.
After reviewing post-operative biopsies, they found that bariatric surgery resulted in improvements for these patients. In the post-operative biopsies, researchers found that fat deposits on the liver resolved in 70 percent of patients. Inflammation was also improved, with lobular inflammation resolved in 74 percent of patients, chronic portal inflammation resolved in 32 percent, and steatohepatitis resolved in 88 percent.
In addition to these improvements, 62 percent of patients with stage two liver fibrosis had an improvement or resolution of the fibrosis. One of three patients with cirrhosis also showed improvement. Dr. Murr noted that these findings on fibrosis reversal apply only to early-stage fibrosis, and not late-stage liver disease.
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