Serfaty du 2012

23 Jan 2012
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Serfaty du 2012

Notes de l'éditeur

  1. In a recent study, Kumar et al have studied the impact of antiviral therapy on steatosis according to genotypes and response to treatment. As you can see on these figures, patients infected with genotype 3, it means viral steatosis, had significant improvement of steatosis in case of virological response, wherea patients infected with genotype 1, it means metabolic steatosis, had no such improvement whatever the response.
  2. In favour of the interaction between HCV and apo B, Perlemuter et al have shown in transgenic mice expressing HCV core protein that microsomal triglyceride transfer protein was inhibited, leading to impaired VLDL secretion and steatosis.
  3. Since a strong link was found between HCV genotype 3 and cannabis smoking, the relationship between steatosis and cannabis intake was studied following adjustment on genotype. In patients with genotype 3 like in those with genotype non-3, the proportion of patients with severe steatosis was significantly greater in daily cannabis smokers than in non smokers and occasional smokers.
  4. A number of cross sectional studies have shown that steatosis was associated with more severe fibrosis in chronic hepatitis C, independently from other risk factors.
  5. This figure shows you rates of sustained virologic response according to genotypes and steatosis in our 3 studies. In the two studies with genotype 1 patients, steatosis was associated with significantly lower rate of response. In the 2 studies with genotype 2 patients, steatosis was also predictive of lower rate of response. As expected, in patients infected with genotype 3, steatosis was not predictive of the response rate. In all studies, steatosis was an independent risk factor of bad response in genotype 1 and genotype 2 patients.
  6. This figure shows you rates of sustained virologic response according to genotypes and steatosis in our 3 studies. In the two studies with genotype 1 patients, steatosis was associated with significantly lower rate of response. In the 2 studies with genotype 2 patients, steatosis was also predictive of lower rate of response. As expected, in patients infected with genotype 3, steatosis was not predictive of the response rate. In all studies, steatosis was an independent risk factor of bad response in genotype 1 and genotype 2 patients.
  7. The pathogenic link between steatosis and fibrosis could be oxidative stress. According to the two hits hypothesis, steatosis could increase the sensitivity of hepatocytes to oxidative stress, the second hit being HCV itself or environemental factors such as alcohol, dru…and therefore could favor fibrogenesis through lipid peroxidation.