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Dendritic cells in liver protect against acetaminophen toxicity
Date:9/1/2011

tic injured mice models to closely examine the protective role of dendritic cells. Dendritic cells are the main antigens in the liver that trigger an immune response and control the liver's tolerance to high doses of invading toxins like acetaminophen. In the experiment all mice were injected with acetaminophen but some mice models were first depleted of dendritic liver cells using a diphtheria toxin while others had their dendritic cell levels bolstered with Flt3L, a protein in the blood previously shown to increase proliferation of dendritic cell levels.

Researchers discovered dendritic cell depletion exacerbates acetaminophen's damage to the liver. The acetaminophen treated mice with depleted dendritic cells had more extensive liver cell and tissue death compared to other mice. Also, these mice died within 48 hours of acetaminophen challenge- whereas death was rare in other mice without dendritic cell depletion. In addition, the study shows dendritic cell expansion successfully diminished the hepatotoxic effects of acetaminophen protecting the liver from damage.

"Understanding the regulatory role of dendritic cells is an important step in the development of immune-therapy for acetaminophen induced liver injury," said Dr. Miller, a member of the NYU Cancer Institute. "Advanced studies are warranted to investigate further the protective role of dendritic cells in humans and their use as a possible new therapeutic target for liver failure prevention in the future."


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Contact: Lauren Woods
lauren.woods@nyumc.org
212-404-3555
NYU Langone Medical Center / New York University School of Medicine
Source:Eurekalert

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