Prosorba column

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The Prosorba Column is a plasma filtering device used to treat severe cases of rheumatoid arthritis or psoriatic arthritis. Its active element is Protein A bonded to a diatomaceous earth/clay bead .[1] The effect of the Protein A is to remove circulating immune complexes responsible for the autoimmune joint deterioration process.

The device was originally manufactured by Imre Corp and approved by the FDA in 1987.[2] The Prosorba Column went out of production at the end of 2006.


  1. ^ Eustice, Carol; Scott J. Zashin (2007). The Everything Health Guide to Arthritis. Everything Books. pp. 111–113. ISBN 978-1-59869-410-9. 
  2. ^ "Drug Discovery in Seattle 2015: An Updated History | Xconomy". Xconomy. 3 August 2015. Retrieved 5 May 2016. 

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