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Norfloxacin Therapy for Patients With Cirrhosis and Severe Liver Failure

2014-08-27 03:17:05 | BioPortfolio

Summary

Patients with advanced cirrhosis have abnormal translocation of Gram-negative bacteria across the intestinal barrier and subsequent systemic inflammatory response. We hypothesized that this translocation may worsen the underlying liver disease. Thus, the aim of this trial was to assess the effects of the oral administration of norfloxacin (an antibiotic that suppresses intestinal Gram-negative bacteria) on the development of complications of cirrhosis.

Description

Intestinal translocation of Gram-negative bacteria occurs in patients with advanced cirrhosis. Long-term oral administration of 400 mg/day of norfloxacin (a fluoroquinolone antibiotic) is known to induce selective intestinal decontamination against Gram-negative bacteria. A randomized, double-blind, placebo-controlled trial of oral norfloxacin (400 mg/day for 1 year) has been conducted in a small series of patients with advanced cirrhosis and low ascitic fluid protein concentrations <1.5 g/dL. This trial showed that norfloxacin therapy significantly increased the 1-year probability of being free of a first episode of spontaneous bacterial peritonitis (SBP) and improved 3-month survival. In this previous study, oral norfloxacin therapy was also found to decrease the risk of development of hepatorenal syndrome, a very severe complication of cirrhosis. It has been suggested that bacterial translocation, through the release of bacterial byproducts, results in systemic inflammation and subsequent systemic vasodilation which precipitates hepatorenal syndrome. Since systemic vasodilation plays a role in the development of ascites, bacterial byproducts via circulatory alterations may contribute to mechanisms leading to ascites formation. It is important to note that a randomized, double-blind, placebo-controlled trial of oral administration of the quinolone ciprofloxacin (500 mg/day for 1 year) has been conducted in a small series of patients with moderately severe cirrhosis, low ascitic fluid protein concentrations (<1.5 g/dL) and no prior history of SBP. However, ciprofloxacin therapy did not significantly increase the 1-year probability of being free of SBP. Taken together the findings of these 2 previous small-size trials suggest that long-term oral quinolone therapy is effective mainly in patients with severe cirrhosis. This is why we decided to perform a large multicenter, randomized, parallel, placebo-controlled trial assessing the effects of norfloxacin on survival in patients with cirrhosis and severe liver failure (Child-Pugh grade C). In addition, the effects of norfloxacin on the development of main complications of cirrhosis will be investigated.

The primary outcome measure will be 6-month survival. The secondary outcome measures will be the proportion of transplanted patients, the occurrence of complications (bacterial infection, renal failure, hepatic encephalopathy and gastrointestinal bleeding). All adult patients with severe cirrhosis might be randomized after written consent. Pregnant persons; patients with either previous history of SBP or of norfloxacin prophylaxis, allergy to quinolones, severe acute alcoholic hepatitis, hepatocellular carcinoma, or HIV infection will not be included. Patients receive either norfloxacin or placebo once a day for 6 months. Three hundred and ninety-two patients are necessary to decrease 6-month mortality rate from 40% in the placebo group to 25% in the norfloxacin group with a beta risk of 90% and an alpha risk of 5%. Patients will be followed-up every month during 6 months and at 9 and 12 months.

Study Design

Allocation: Randomized, Control: Placebo Control, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Investigator, Outcomes Assessor), Primary Purpose: Prevention

Conditions

Severe Cirrhosis

Intervention

Norfloxacin, Placebo

Location

Assisatnce publique Hoptitaux de Paris
Clichy
France
92110

Status

Recruiting

Source

Assistance Publique - Hôpitaux de Paris

Results (where available)

View Results

Links

Published on BioPortfolio: 2014-08-27T03:17:05-0400

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Medical and Biotech [MESH] Definitions

A synthetic fluoroquinolone (FLUOROQUINOLONES) with broad-spectrum antibacterial activity against most gram-negative and gram-positive bacteria. Norfloxacin inhibits bacterial DNA GYRASE.

Experimentally induced chronic injuries to the parenchymal cells in the liver to achieve a model for LIVER CIRRHOSIS.

FIBROSIS of the hepatic parenchyma due to obstruction of BILE flow (CHOLESTASIS) in the intrahepatic or extrahepatic bile ducts (BILE DUCTS, INTRAHEPATIC; BILE DUCTS, EXTRAHEPATIC). Primary biliary cirrhosis involves the destruction of small intra-hepatic bile ducts and bile secretion. Secondary biliary cirrhosis is produced by prolonged obstruction of large intrahepatic or extrahepatic bile ducts from a variety of causes.

Misunderstanding among individuals, frequently research subjects, of scientific methods such as randomization and placebo controls.

An effect usually, but not necessarily, beneficial that is attributable to an expectation that the regimen will have an effect, i.e., the effect is due to the power of suggestion.

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Hepatology
Hepatology is the study of liver, gallbladder, biliary tree, and pancreas, and diseases associated with them. This includes viral hepatitis, alcohol damage, cirrhosis and cancer. As modern lifestyles change, with alcoholism and cancer becoming more promi...


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