Sunday, November 3, 2013

Liver tropism is key for B cell deletion immunotherapy

Liver tropism is key for B cell deletion immunotherapy


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PUBLIC RELEASE DATE:

1-Nov-2013



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Contact: Corinne Williams
press_releases@the-jci.org
Journal of Clinical Investigation






Antibodies against the B cell surface protein CD20 have been used successfully to treat B cell-mediated autoimmune diseases and lymphomas. 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. 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 therapy

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TITLE:
The mechanism of anti-CD20mediated B cell depletion revealed by intravital imaging

AUTHOR CONTACT:
Philippe Bousso

Institut Pasteur, Paris, FRA

Phone: 33 1 45 68 85 51; Fax: ; E-mail: bousso@pasteur.fr

View this article at: http://www.jci.org/articles/view/70972?key=b0390c54a360d17753f4



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Liver tropism is key for B cell deletion immunotherapy


[ Back to EurekAlert! ]

PUBLIC RELEASE DATE:

1-Nov-2013



[


| E-mail

]


Share Share

Contact: Corinne Williams
press_releases@the-jci.org
Journal of Clinical Investigation






Antibodies against the B cell surface protein CD20 have been used successfully to treat B cell-mediated autoimmune diseases and lymphomas. 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. 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 therapy

###

TITLE:
The mechanism of anti-CD20mediated B cell depletion revealed by intravital imaging

AUTHOR CONTACT:
Philippe Bousso

Institut Pasteur, Paris, FRA

Phone: 33 1 45 68 85 51; Fax: ; E-mail: bousso@pasteur.fr

View this article at: http://www.jci.org/articles/view/70972?key=b0390c54a360d17753f4



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[


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AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert! system.




Source: http://www.eurekalert.org/pub_releases/2013-11/joci-lti102513.php
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