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Liver Tropism-The Key for B Cell Deletion Immunotherapy

by Dr. Enozia Vakil on November 2, 2013 at 4:36 PM
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 Liver Tropism-The Key for B Cell Deletion Immunotherapy

B cell-mediated autoimmune diseases and lymphoma can now be treated using antibodies against B cell protein CD20. Antibody binding receptors, called Fc receptors, on other immune cells bind anti-CD20 on coated B cells, which induces B cell deletion through a mechanism that is not clearly understood.

In this issue of the Journal of Clinical Investigation, Philippe Bousse and colleagues at the Pasteur Institute in Paris described the fate of B cells in live mice after treatment with anti-CD20 antibodies.

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Bousse and his group found that B cells circulating through the liver were the first ones depleted after treatment and that B cells in circulation were more susceptible to deletion than those stationary in the spleen or lymph nodes.

The researchers used intravital two-photon microscopy to follow B cells in the liver as they halted near specialized Fc receptor-bearing cells called Kupffer cells. The Kupffer cells bound and consumed the anti-CD20-coated B cells.

The study assigns a vital role to liver Kupffer cells in deleting B cells and describes techniques that may be used to improve the effectiveness of anti-CD20

Source: Eurekalert
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